Add Minio TLS configuration doc for Kubernetes deployment (#5617)

In-place decryption/encryption already holds write
locks on them, attempting to acquire a read lock would
fail.

.github/PULL_REQUEST_TEMPLATE.md

@@ -24,5 +24,6 @@
 - [ ] My code follows the code style of this project.
 - [ ] My change requires a change to the documentation.
 - [ ] I have updated the documentation accordingly.
-- [ ] I have added tests to cover my changes.
+- [ ] I have added unit tests to cover my changes.
+- [ ] I have added/updated functional tests in [mint](https://github.com/minio/mint). (If yes, add `mint` PR # here: )
 - [ ] All new and existing tests passed.

.gitignore

@@ -9,7 +9,7 @@ site/
 /.idea/
 /Minio.iml
 **/access.log
-build
+build/
 vendor/**/*.js
 vendor/**/*.json
 release
@@ -23,3 +23,5 @@ parts/
 prime/
 snap/.snapcraft/
 stage/
+.sia_temp/
+buildcoveragecoverage.txt

.travis.yml

@@ -17,8 +17,8 @@ env:
 script:
 ## Run all the tests
 - make
-- diff -au <(gofmt -d cmd) <(printf "")
-- diff -au <(gofmt -d pkg) <(printf "")
+- diff -au <(gofmt -s -d cmd) <(printf "")
+- diff -au <(gofmt -s -d pkg) <(printf "")
 - make test GOFLAGS="-timeout 15m -race -v"
 - make coverage
 
@@ -26,4 +26,4 @@ after_success:
 - bash <(curl -s https://codecov.io/bash)
 
 go:
-- 1.9.1
+- 1.9.4

Dockerfile

@@ -1,10 +1,13 @@
-FROM golang:1.9.1-alpine3.6
+FROM golang:1.9.4-alpine3.6
 
 MAINTAINER Minio Inc <dev@minio.io>
 
 ENV GOPATH /go
 ENV PATH $PATH:$GOPATH/bin
 ENV CGO_ENABLED 0
+ENV MINIO_UPDATE off
+ENV MINIO_ACCESS_KEY_FILE=access_key \
+    MINIO_SECRET_KEY_FILE=secret_key
 
 WORKDIR /go/src/github.com/minio/
 

Dockerfile.dev

@@ -1,10 +1,13 @@
-FROM golang:1.9.1-alpine3.6
+FROM golang:1.9.4-alpine3.6
 
 MAINTAINER Minio Inc <dev@minio.io>
 
 ENV GOPATH /go
 ENV PATH $PATH:$GOPATH/bin
 ENV CGO_ENABLED 0
+ENV MINIO_UPDATE off
+ENV MINIO_ACCESS_KEY_FILE=access_key \
+    MINIO_SECRET_KEY_FILE=secret_key
 
 WORKDIR /go/src/github.com/minio/
 

Dockerfile.release

@@ -4,6 +4,10 @@ MAINTAINER Minio Inc <dev@minio.io>
  
 COPY dockerscripts/docker-entrypoint.sh dockerscripts/healthcheck.sh /usr/bin/
 
+ENV MINIO_UPDATE off
+ENV MINIO_ACCESS_KEY_FILE=access_key \
+    MINIO_SECRET_KEY_FILE=secret_key
+
 RUN \
      apk add --no-cache ca-certificates && \
      apk add --no-cache --virtual .build-deps curl && \

Makefile

@@ -7,12 +7,12 @@ BUILD_LDFLAGS := '$(LDFLAGS)'
 all: build
 
 checks:
-	@echo "Check deps"
+	@echo "Checking dependencies"
 	@(env bash $(PWD)/buildscripts/checkdeps.sh)
-	@echo "Checking project is in GOPATH"
+	@echo "Checking for project in GOPATH"
 	@(env bash $(PWD)/buildscripts/checkgopath.sh)
 
-getdeps: checks
+getdeps:
 	@echo "Installing golint" && go get -u github.com/golang/lint/golint
 	@echo "Installing gocyclo" && go get -u github.com/fzipp/gocyclo
 	@echo "Installing deadcode" && go get -u github.com/remyoudompheng/go-misc/deadcode
@@ -58,19 +58,17 @@ spelling:
 check: test
 test: verifiers build
 	@echo "Running unit tests"
-	@go test $(GOFLAGS) .
-	@go test $(GOFLAGS) github.com/minio/minio/cmd...
-	@go test $(GOFLAGS) github.com/minio/minio/pkg...
+	@go test $(GOFLAGS) ./...
 	@echo "Verifying build"
 	@(env bash $(PWD)/buildscripts/verify-build.sh)
 
 coverage: build
 	@echo "Running all coverage for minio"
-	@./buildscripts/go-coverage.sh
+	@(env bash $(PWD)/buildscripts/go-coverage.sh)
 
 # Builds minio locally.
-build:
-	@echo "Building minio to $(PWD)/minio ..."
+build: checks
+	@echo "Building minio binary to './minio'"
 	@CGO_ENABLED=0 go build --ldflags $(BUILD_LDFLAGS) -o $(PWD)/minio
 
 pkg-add:
@@ -90,18 +88,13 @@ pkg-list:
 
 # Builds minio and installs it to $GOPATH/bin.
 install: build
-	@echo "Installing minio at $(GOPATH)/bin/minio ..."
+	@echo "Installing minio binary to '$(GOPATH)/bin/minio'"
 	@cp $(PWD)/minio $(GOPATH)/bin/minio
-	@echo "Check 'minio -h' for help."
-
-release: verifiers
-	@MINIO_RELEASE=RELEASE ./buildscripts/build.sh
-
-experimental: verifiers
-	@MINIO_RELEASE=EXPERIMENTAL ./buildscripts/build.sh
+	@echo "Installation successful. To learn more, try \"minio --help\"."
 
 clean:
 	@echo "Cleaning up all the generated files"
 	@find . -name '*.test' | xargs rm -fv
-	@rm -rf build
-	@rm -rf release
+	@rm -rvf minio
+	@rm -rvf build
+	@rm -rvf release

README.md

@@ -1,5 +1,5 @@
 # Minio Quickstart Guide
-[![Slack](https://slack.minio.io/slack?type=svg)](https://slack.minio.io) [![Go Report Card](https://goreportcard.com/badge/minio/minio)](https://goreportcard.com/report/minio/minio) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/) [![codecov](https://codecov.io/gh/minio/minio/branch/master/graph/badge.svg)](https://codecov.io/gh/minio/minio) [![Snap Status](https://build.snapcraft.io/badge/minio/minio.svg)](https://build.snapcraft.io/user/minio/minio)
+[![Slack](https://slack.minio.io/slack?type=svg)](https://slack.minio.io) [![Go Report Card](https://goreportcard.com/badge/minio/minio)](https://goreportcard.com/report/minio/minio) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/) [![codecov](https://codecov.io/gh/minio/minio/branch/master/graph/badge.svg)](https://codecov.io/gh/minio/minio)
 
 Minio is an object storage server released under Apache License v2.0. It is compatible with Amazon S3 cloud storage service. It is best suited for storing unstructured data such as photos, videos, log files, backups and container / VM images. Size of an object can range from a few KBs to a maximum of 5TB.
 
@@ -26,8 +26,8 @@ Install minio packages using [Homebrew](http://brew.sh/)
 brew install minio/stable/minio
 minio server /data
 ```
-#### Note
-If you previously installed minio using `brew install minio` then it is recommended that you reinstall minio from `minio/stable/minio` official repo instead.
+
+> NOTE: If you previously installed minio using `brew install minio` then it is recommended that you reinstall minio from `minio/stable/minio` official repo instead.
 ```sh
 brew uninstall minio
 brew install minio/stable/minio
@@ -48,23 +48,21 @@ chmod 755 minio
 | ----------| -------- | ------|
 |GNU/Linux|64-bit Intel|https://dl.minio.io/server/minio/release/linux-amd64/minio |
 ```sh
+wget https://dl.minio.io/server/minio/release/linux-amd64/minio
 chmod +x minio
 ./minio server /data
 ```
 
 ### Snap
-You can install the latest `minio` [snap](https://snapcraft.io), and help testing the most recent changes of the master branch in [all the supported Linux distros](https://snapcraft.io/docs/core/install) with:
-
+Install minio using [Snap](https://snapcraft.io)
 ```sh
 sudo snap install minio --edge
 ```
 
-Every time a new version of `minio` is pushed to the store, you will get it updated automatically.
-
-You will need to allow the minio snap to observe mounts in the system:
-
+Start minio using `snap run` command
 ```sh
 sudo snap connect minio:mount-observe
+sudo snap run minio server /data
 ```
 
 ## Microsoft Windows
@@ -88,7 +86,6 @@ service minio start
 ```
 
 ## Install from Source
-
 Source installation is only intended for developers and advanced users. If you do not have a working Golang environment, please follow [How to install Golang](https://docs.minio.io/docs/how-to-install-golang).
 
 ```sh
@@ -103,6 +100,11 @@ Minio Server comes with an embedded web based object browser. Point your web bro
 ## Test using Minio Client `mc`
 `mc` provides a modern alternative to UNIX commands like ls, cat, cp, mirror, diff etc. It supports filesystems and Amazon S3 compatible cloud storage services. Follow the Minio Client [Quickstart Guide](https://docs.minio.io/docs/minio-client-quickstart-guide) for further instructions.
 
+## Pre-existing data
+When deployed on a single drive, Minio server lets clients access any pre-existing data in the data directory. For example, if Minio is started with the command  `minio server /mnt/data`, any pre-existing data in the `/mnt/data` directory would be accessible to the clients.
+
+The above statement is also valid for all gateway backends.
+
 ## Explore Further
 - [Minio Erasure Code QuickStart Guide](https://docs.minio.io/docs/minio-erasure-code-quickstart-guide)
 - [Use `mc` with Minio Server](https://docs.minio.io/docs/minio-client-quickstart-guide)
@@ -113,3 +115,7 @@ Minio Server comes with an embedded web based object browser. Point your web bro
 
 ## Contribute to Minio Project
 Please follow Minio [Contributor's Guide](https://github.com/minio/minio/blob/master/CONTRIBUTING.md)
+
+
+## License
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fminio%2Fminio.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2Fminio%2Fminio?ref=badge_large)

README_ZH.md

@@ -1,197 +0,0 @@
-# Minio 快速入门 [![Slack](https://slack.minio.io/slack?type=svg)](https://slack.minio.io) [![Go Report Card](https://goreportcard.com/badge/minio/minio)](https://goreportcard.com/report/minio/minio) [![codecov](https://codecov.io/gh/minio/minio/branch/master/graph/badge.svg)](https://codecov.io/gh/minio/minio) [![Snap Status](https://build.snapcraft.io/badge/minio/minio.svg)](https://build.snapcraft.io/user/minio/minio)
-
-Minio是一个对象存储服务，基于Apache License v2.0协议. 它完全兼容亚马逊的S3云储存服务，非常适合于存储很多非结构化的数据，例如图片、视频、日志文件、备份数据和容器/虚拟机镜像等，而一个对象文件可以是任意大小，从几kb到最大5T不等。 
-
-##  1. 下载
-
-Minio是一个非常轻量的服务,可以很简单的和其他应用的结合，类似 NodeJS, Redis 或者 MySQL.
-
-| Platform| Architecture | URL|
-| ----------| -------- | ------|
-|GNU/Linux|64-bit Intel|https://dl.minio.io/server/minio/release/linux-amd64/minio|
-|Apple OS X|64-bit Intel|https://dl.minio.io/server/minio/release/darwin-amd64/minio|
-|Microsoft Windows|64-bit|https://dl.minio.io/server/minio/release/windows-amd64/minio.exe|
-|FreeBSD|64-bit|https://dl.minio.io/server/minio/release/freebsd-amd64/minio|
-
-### Homebrew 安装
-
-使用[Homebrew](http://brew.sh/) 来安装minio
- 
-```sh
-$ brew install minio
-$ minio --help
-```
-
-### 源码安装
-
-源码安装只针对开发者和一些高级用户，如果你还没有golang的环境，请安装golang官网安装[How to install Golang](https://docs.minio.io/docs/zh-CN/how-to-install-golang).
-
-```sh
-
-$ go get -u github.com/minio/minio
-
-
-```
-
-## 2. 运行Minio服务
-
-
-### GNU/Linux
-
- ```sh
-
-$ chmod +x minio
-$ ./minio --help
-$ ./minio server /data
-
-端点:  http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-AccessKey: USWUXHGYZQYFYFFIT3RE
-SecretKey: MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-区域:    us-east-1
-
-浏览器访问入口:
-   http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-
-命令行访问: https://docs.minio.io/docs/zh-CN/minio-client-quickstart-guide
-   $ mc config host add myminio http://10.0.0.10:9000 USWUXHGYZQYFYFFIT3RE MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-
-对象操作API (兼容Amazon S3):
-   Go:         https://docs.minio.io/docs/zh-CN/golang-client-quickstart-guide
-   Java:       https://docs.minio.io/docs/zh-CN/java-client-quickstart-guide
-   Python:     https://docs.minio.io/docs/zh-CN/python-client-quickstart-guide
-   JavaScript: https://docs.minio.io/docs/zh-CN/javascript-client-quickstart-guide
-
-```
-
-### OS X
-
-
- ```sh
-
-$ chmod 755 minio
-$ ./minio --help
-$ ./minio server /data
-
-端点:  http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-AccessKey: USWUXHGYZQYFYFFIT3RE
-SecretKey: MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-区域:    us-east-1
-
-浏览器访问入口:
-   http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-
-命令行访问: https://docs.minio.io/docs/zh-CN/minio-client-quickstart-guide
-   $ mc config host add myminio http://10.0.0.10:9000 USWUXHGYZQYFYFFIT3RE MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-
-对象操作API (兼容Amazon S3):
-   Go:         https://docs.minio.io/docs/zh-CN/golang-client-quickstart-guide
-   Java:       https://docs.minio.io/docs/zh-CN/java-client-quickstart-guide
-   Python:     https://docs.minio.io/docs/zh-CN/python-client-quickstart-guide
-   JavaScript: https://docs.minio.io/docs/zh-CN/javascript-client-quickstart-guide
-
-```
-
-### Microsoft Windows
-
-```sh
-
-C:\Users\Username\Downloads> minio.exe --help
-C:\Users\Username\Downloads> minio.exe server D:\Photos
-
-端点:  http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-AccessKey: USWUXHGYZQYFYFFIT3RE
-SecretKey: MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-区域:    us-east-1
-
-浏览器访问入口:
-   http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-
-命令行访问: https://docs.minio.io/docs/zh-CN/minio-client-quickstart-guide
-   $ mc.exe config host add myminio http://10.0.0.10:9000 USWUXHGYZQYFYFFIT3RE MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-
-对象操作API (兼容Amazon S3):
-   Go:         https://docs.minio.io/docs/zh-CN/golang-client-quickstart-guide
-   Java:       https://docs.minio.io/docs/zh-CN/java-client-quickstart-guide
-   Python:     https://docs.minio.io/docs/zh-CN/python-client-quickstart-guide
-   JavaScript: https://docs.minio.io/docs/zh-CN/javascript-client-quickstart-guide
-
-
-```
-
-### Docker
-
-```sh
-
-$ docker pull minio/minio
-$ docker run -p 9000:9000 minio/minio
-
-```
-访问minio的docker入门指南获得更多内容 [here](https://docs.minio.io/docs/zh-CN/minio-docker-quickstart-guide)
-
-### FreeBSD
-
-```sh
-
-$ chmod 755 minio
-$ ./minio --help
-$ ./minio server /data
-
-端点:  http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-AccessKey: USWUXHGYZQYFYFFIT3RE
-SecretKey: MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-区域:    us-east-1
-
-浏览器访问入口:
-   http://10.0.0.10:9000  http://127.0.0.1:9000  http://172.17.0.1:9000
-
-命令行访问: https://docs.minio.io/docs/zh-CN/minio-client-quickstart-guide
-   $ mc config host add myminio http://10.0.0.10:9000 USWUXHGYZQYFYFFIT3RE MOJRH0mkL1IPauahWITSVvyDrQbEEIwljvmxdq03
-
-对象操作API (兼容Amazon S3):
-   Go:         https://docs.minio.io/docs/zh-CN/golang-client-quickstart-guide
-   Java:       https://docs.minio.io/docs/zh-CN/java-client-quickstart-guide
-   Python:     https://docs.minio.io/docs/zh-CN/python-client-quickstart-guide
-   JavaScript: https://docs.minio.io/docs/zh-CN/javascript-client-quickstart-guide
-
-
-```
-请访问FreeBSD的官网指南获取更多详细信息[here](https://www.freebsd.org/doc/handbook/zfs-quickstart.html)
-
-## 3. 使用浏览器测试minio服务
-
-打开浏览器并输入 http://127.0.0.1:9000 查看在minio服务器上面的所有bucket
-
-![Screenshot](https://github.com/minio/minio/blob/master/docs/screenshots/minio-browser.jpg?raw=true)
-
-
-## 4. 使用`mc`测试minio服务
-
-
-按照 [这个](https://docs.minio.io/docs/minio-client-quickstart-guide) 安装mc. 使用 `mc ls` 命令显示所有在minio服务上面的bucket.
-
-```sh
-
-$ mc ls myminio/
-[2015-08-05 08:13:22 IST]     0B andoria/
-[2015-08-05 06:14:26 IST]     0B deflector/
-[2015-08-05 08:13:11 IST]     0B ferenginar/
-[2016-03-08 14:56:35 IST]     0B jarjarbing/
-[2016-01-20 16:07:41 IST]     0B my.minio.io/
-
-```
-
-查看更多的例子请访问 [Minio Client Complete Guide](https://docs.minio.io/docs/zh-CN/minio-client-complete-guide).
-
-
-## 5. 更多内容
-
-- [Minio Erasure Code 快速入门](https://docs.minio.io/docs/zh-CN/minio-erasure-code-quickstart-guide)
-- [Minio Docker 快速入门](https://docs.minio.io/docs/zh-CN/minio-docker-quickstart-guide)
-- [使用`mc`测试 Minio Server](https://docs.minio.io/docs/zh-CN/minio-client-quickstart-guide)
-- [使用 `aws-cli` 测试 Minio Server](https://docs.minio.io/docs/zh-CN/aws-cli-with-minio)
-- [使用 `s3cmd` 测试 Minio Server](https://docs.minio.io/docs/zh-CN/s3cmd-with-minio)
-- [使用 `minio-go` SDK ce's测试 Minio Server](https://docs.minio.io/docs/zh-CN/golang-client-quickstart-guide)
-
-
-## 6. 给Minio项目贡献
-请按照Minio [贡献者指导手册](https://github.com/minio/minio/blob/master/CONTRIBUTING.md)

README_zh_CN.md

@@ -0,0 +1,121 @@
+# Minio Quickstart Guide [![Slack](https://slack.minio.io/slack?type=svg)](https://slack.minio.io) [![Go Report Card](https://goreportcard.com/badge/minio/minio)](https://goreportcard.com/report/minio/minio) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/) [![codecov](https://codecov.io/gh/minio/minio/branch/master/graph/badge.svg)](https://codecov.io/gh/minio/minio)
+
+Minio 是一个基于Apache License v2.0开源协议的对象存储服务。它兼容亚马逊S3云存储服务接口，非常适合于存储大容量非结构化的数据，例如图片、视频、日志文件、备份数据和容器/虚拟机镜像等，而一个对象文件可以是任意大小，从几kb到最大5T不等。 
+
+Minio是一个非常轻量的服务,可以很简单的和其他应用的结合，类似 NodeJS, Redis 或者 MySQL。
+
+## Docker 容器
+### 稳定版
+```
+docker pull minio/minio
+docker run -p 9000:9000 minio/minio server /data
+```
+
+### 尝鲜版
+```
+docker pull minio/minio:edge
+docker run -p 9000:9000 minio/minio:edge server /data
+```
+更多Docker部署信息请访问 [这里](https://docs.minio.io/docs/minio-docker-quickstart-guide)
+
+## macOS
+### Homebrew
+使用 [Homebrew](http://brew.sh/)安装minio
+
+```sh
+brew install minio/stable/minio
+minio server /data
+```
+#### Note
+如果你之前使用 `brew install minio`安装过minio, 可以用 `minio/stable/minio` 官方镜像进行重装. 由于golang 1.8的bug,homebrew版本不太稳定。
+
+```
+brew uninstall minio
+brew install minio/stable/minio
+```
+
+### 下载二进制文件
+| 操作系统| CPU架构 | 地址|
+| ----------| -------- | ------|
+|Apple macOS|64-bit Intel|https://dl.minio.io/server/minio/release/darwin-amd64/minio |
+```sh
+chmod 755 minio
+./minio server /data
+```
+
+## GNU/Linux
+### 下载二进制文件
+| 操作系统| CPU架构 | 地址|
+| ----------| -------- | ------|
+|GNU/Linux|64-bit Intel|https://dl.minio.io/server/minio/release/linux-amd64/minio |
+```sh
+chmod +x minio
+./minio server /data
+```
+
+### 快照版
+你可以下载最新版 `minio` [快照](https://snapcraft.io), 并且帮助我们一起验证master分支上[所有支持的Linux发行版](https://snapcraft.io/docs/core/install) 的一些最新修改:
+
+```sh
+sudo snap install minio --edge
+```
+
+每次有最新的 `minio` 被推送到服务器,你都会自动更新下来.
+
+你需要允许minio snap来观察其安装:
+
+```sh
+sudo snap connect minio:mount-observe
+```
+
+## 微软Windows系统
+### 下载二进制文件
+| 操作系统| CPU架构 | 地址|
+| ----------| -------- | ------|
+|微软Windows系统|64位|https://dl.minio.io/server/minio/release/windows-amd64/minio.exe |
+```sh
+minio.exe server D:\Photos
+```
+
+## FreeBSD
+### Port
+使用 [pkg](https://github.com/freebsd/pkg)进行安装。
+
+```sh
+pkg install minio
+sysrc minio_enable=yes
+sysrc minio_disks=/home/user/Photos
+service minio start
+```
+
+## 使用源码安装
+
+采用源码安装仅供开发人员和高级用户使用,如果你还没有Golang环境， 请参考 [How to install Golang](https://docs.minio.io/docs/how-to-install-golang).
+
+```sh
+go get -u github.com/minio/minio
+```
+
+## 使用Minio浏览器进行验证
+安装后使用浏览器访问[http://127.0.0.1:9000](http://127.0.0.1:9000)，如果可以访问，则表示minio已经安装成功。
+
+![Screenshot](https://github.com/minio/minio/blob/master/docs/screenshots/minio-browser.jpg?raw=true)
+
+## 使用Minio客户端 `mc`进行验证
+`mc` 提供了一些UNIX常用命令的替代品，像ls, cat, cp, mirror, diff这些。 它支持文件系统和亚马逊S3云存储服务。 更多信息请参考 [mc快速入门](https://docs.minio.io/docs/minio-client-quickstart-guide) 。
+
+## 已经存在的数据
+当在单块磁盘上部署Minio server,Minio server允许客户端访问数据目录下已经存在的数据。比如，如果Minio使用`minio server /mnt/data`启动，那么所有已经在`/mnt/data`目录下的数据都可以被客户端访问到。
+
+上述描述对所有网关后端同样有效。
+
+## 了解更多
+- [Minio纠删码入门](https://docs.minio.io/docs/minio-erasure-code-quickstart-guide)
+- [`mc`快速入门](https://docs.minio.io/docs/minio-client-quickstart-guide)
+- [使用 `aws-cli`](https://docs.minio.io/docs/aws-cli-with-minio)
+- [使用 `s3cmd`](https://docs.minio.io/docs/s3cmd-with-minio)
+- [使用 `minio-go` SDK](https://docs.minio.io/docs/golang-client-quickstart-guide)
+- [Minio文档](https://docs.minio.io)
+
+## 如何参与到Minio项目
+请参考 [贡献者指南](https://github.com/minio/minio/blob/master/CONTRIBUTING.md)。欢迎各位中国程序员加到Minio项目中。

appveyor.yml

@@ -12,7 +12,7 @@ clone_folder: c:\gopath\src\github.com\minio\minio
 # Environment variables
 environment:
   GOPATH: c:\gopath
-  GOROOT: c:\go
+  GOROOT: c:\go19
 
 # scripts that run after cloning repository
 install:
@@ -38,9 +38,8 @@ test_script:
   # Unit tests
   - ps: Add-AppveyorTest "Unit Tests" -Outcome Running
   - mkdir build\coverage
-  - go test -v -timeout 17m -race github.com/minio/minio/cmd...
-  - go test -v -race github.com/minio/minio/pkg...
-  - go test -v -timeout 17m -coverprofile=build\coverage\coverage.txt -covermode=atomic github.com/minio/minio/cmd
+  - for /f "" %%G in ('go list github.com/minio/minio/... ^| find /i /v "browser/"') do ( go test -v -timeout 20m -race %%G )
+  - go test -v -timeout 20m -coverprofile=build\coverage\coverage.txt -covermode=atomic github.com/minio/minio/cmd
   - ps: Update-AppveyorTest "Unit Tests" -Outcome Passed
 
 after_test:

browser/app/index.html

@@ -5,13 +5,13 @@
         <meta charset="UTF-8">
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <title>Minio Browser</title>
-        <link rel="stylesheet" href="/minio/loader.css" type="text/css">
+        <link rel="stylesheet" href="loader.css" type="text/css">
     </head>
 
     <body>
         <div class="page-load">
             <div class="pl-inner">
-                <img src="/minio/logo.svg" alt="">
+                <img src="logo.svg" alt="">
             </div>
         </div>
         <div id="root"></div>
@@ -27,19 +27,19 @@
                     <ul>
                         <li>
                             <a href="http://www.google.com/chrome/">
-                                <img src="/minio/chrome.png" alt="">
+                                <img src="chrome.png" alt="">
                                 <div>Chrome</div>
                             </a>
                         </li>
                         <li>
                             <a href="https://www.mozilla.org/en-US/firefox/new/">
-                                <img src="/minio/firefox.png" alt="">
+                                <img src="firefox.png" alt="">
                                 <div>Firefox</div>
                             </a>
                         </li>
                         <li>
                             <a href="https://www.apple.com/safari/">
-                                <img src="/minio/safari.png" alt="">
+                                <img src="safari.png" alt="">
                                 <div>Safari</div>
                             </a>
                         </li>
@@ -51,6 +51,6 @@
         <![endif]-->
 
         <script>currentUiVersion = 'MINIO_UI_VERSION'</script>
-        <script src="/minio/index_bundle.js"></script>
+        <script src="index_bundle.js"></script>
     </body>
 </html>

browser/app/index.js

@@ -41,6 +41,8 @@ import _Login from './js/components/Login.js'
 import _Browse from './js/components/Browse.js'
 import fontAwesome from 'font-awesome/css/font-awesome.css'
 
+import MaterialDesignIconicFonts from 'material-design-iconic-font/dist/css/material-design-iconic-font.min.css'
+
 import Web from './js/web'
 window.Web = Web
 
@@ -81,7 +83,7 @@ ReactDOM.render((
   <Provider store={ store } web={ web }>
     <Router history={ browserHistory }>
       <Route path='/' component={ App }>
-        <Route path='minio' component={ App }>
+        <Route path={ minioBrowserPrefix } component={ App }>
           <IndexRoute component={ Browse } onEnter={ authNeeded } />
           <Route path='login' component={ Login } onEnter={ authNotNeeded } />
           <Route path=':bucket' component={ Browse } onEnter={ authNeeded } />

browser/app/js/actions.js

@@ -24,6 +24,8 @@ export const SET_CURRENT_BUCKET = 'SET_CURRENT_BUCKET'
 export const SET_CURRENT_PATH = 'SET_CURRENT_PATH'
 export const SET_BUCKETS = 'SET_BUCKETS'
 export const ADD_BUCKET = 'ADD_BUCKET'
+export const REMOVE_BUCKET = 'REMOVE_BUCKET'
+export const SHOW_BUCKET_DROPDOWN = 'SHOW_BUCKET_DROPDOWN'
 export const SET_VISIBLE_BUCKETS = 'SET_VISIBLE_BUCKETS'
 export const SET_OBJECTS = 'SET_OBJECTS'
 export const APPEND_OBJECTS = 'APPEND_OBJECTS'
@@ -173,6 +175,27 @@ export const addBucket = bucket => {
   }
 }
 
+export const removeBucket = bucket => {
+  return {
+    type: REMOVE_BUCKET,
+    bucket
+  }
+}
+
+export const showBucketDropdown = bucket => {
+  return {
+    type: SHOW_BUCKET_DROPDOWN,
+    showBucketDropdown: true
+  }
+}
+
+export const hideBucketDropdown = bucket => {
+  return {
+    type: SHOW_BUCKET_DROPDOWN,
+    showBucketDropdown: false
+  }
+}
+
 export const showMakeBucketModal = () => {
   return {
     type: SHOW_MAKEBUCKET_MODAL,
@@ -314,10 +337,35 @@ export const selectBucket = (newCurrentBucket, prefix) => {
   }
 }
 
+export const deleteBucket = (bucket) => {
+  return (dispatch, getState) => {
+    // DeleteBucket() RPC call will ONLY delete a bucket if it is empty of
+    // objects. This means a call can just be sent, as it is entirely reversable
+    // and won't do any permanent damage.
+    web.DeleteBucket({
+      bucketName: bucket
+    })
+      .then(() => {
+        dispatch(showAlert({
+          type: 'info',
+          message: `Bucket '${bucket}' has been deleted.`
+        }))
+        dispatch(removeBucket(bucket))
+      })
+      .catch(err => {
+        let message = err.message
+        dispatch(showAlert({
+          type: 'danger',
+          message: message
+        }))
+      })
+  }
+}
+
 export const listObjects = () => {
   return (dispatch, getState) => {
-    const {currentBucket, currentPath, marker, objects, istruncated, web} = getState()
-    if (!istruncated) return
+    const {buckets, currentBucket, currentPath, marker, objects, istruncated, web} = getState()
+    if (!istruncated || buckets.length === 0) return
     web.ListObjects({
       bucketName: currentBucket,
       prefix: currentPath,
@@ -352,7 +400,6 @@ export const listObjects = () => {
 export const selectPrefix = prefix => {
   return (dispatch, getState) => {
     const {currentBucket, web} = getState()
-    dispatch(resetObjects())
     dispatch(setLoadPath(prefix))
     web.ListObjects({
       bucketName: currentBucket,
@@ -367,6 +414,7 @@ export const selectPrefix = prefix => {
           object.name = object.name.replace(`${prefix}`, '');
           return object
         })
+        dispatch(resetObjects())
         dispatch(appendObjects(
           objects,
           res.nextmarker,
@@ -465,7 +513,7 @@ export const uploadFile = (file, xhr) => {
   return (dispatch, getState) => {
     const {currentBucket, currentPath} = getState()
     const objectName = `${currentPath}${file.name}`
-    const uploadUrl = `${window.location.origin}/minio/upload/${currentBucket}/${objectName}`
+    const uploadUrl = `${window.location.origin}${minioBrowserPrefix}/upload/${currentBucket}/${objectName}`
     // The slug is a unique identifer for the file upload.
     const slug = `${currentBucket}-${currentPath}-${file.name}`
 
@@ -482,7 +530,7 @@ export const uploadFile = (file, xhr) => {
     }))
 
     xhr.onload = function(event) {
-      if (xhr.status == 401 || xhr.status == 403 || xhr.status == 500) {
+      if (xhr.status == 401 || xhr.status == 403) {
         setShowAbortModal(false)
         dispatch(stopUpload({
           slug
@@ -492,6 +540,16 @@ export const uploadFile = (file, xhr) => {
           message: 'Unauthorized request.'
         }))
       }
+      if (xhr.status == 500) {
+        setShowAbortModal(false)
+        dispatch(stopUpload({
+          slug
+        }))
+        dispatch(showAlert({
+          type: 'danger',
+          message: xhr.responseText
+        }))
+      }
       if (xhr.status == 200) {
         setShowAbortModal(false)
         dispatch(stopUpload({

browser/app/js/components/Browse.js

@@ -157,7 +157,7 @@ export default class Browse extends React.Component {
         // Download the selected file.
         web.CreateURLToken()
           .then(res => {
-            let url = `${window.location.origin}/minio/download/${currentBucket}/${encPrefix}?token=${res.token}`
+            let url = `${window.location.origin}${minioBrowserPrefix}/download/${currentBucket}/${encPrefix}?token=${res.token}`
             window.location = url
           })
           .catch(err => dispatch(actions.showAlert({
@@ -210,9 +210,19 @@ export default class Browse extends React.Component {
     dispatch(actions.hideAbout())
   }
 
+  toggleBucketDropdown(e) {
+    const {dispatch, showBucketDropdown} = this.props
+    if (showBucketDropdown) {
+      dispatch(actions.hideBucketDropdown())
+    } else {
+      dispatch(actions.showBucketDropdown())
+    }
+  }
+
   showBucketPolicy(e) {
     e.preventDefault()
     const {dispatch} = this.props
+    this.toggleBucketDropdown(e)
     dispatch(actions.showBucketPolicy())
   }
 
@@ -222,10 +232,17 @@ export default class Browse extends React.Component {
     dispatch(actions.hideBucketPolicy())
   }
 
+  deleteBucket(e, bucket) {
+    e.preventDefault()
+    const {dispatch} = this.props
+    this.toggleBucketDropdown(e)
+    dispatch(actions.deleteBucket(bucket))
+    browserHistory.push(`${minioBrowserPrefix}/`)
+  }
+
   uploadFile(e) {
     e.preventDefault()
-    const {dispatch, buckets} = this.props
-
+    const {dispatch, buckets, currentBucket} = this.props
     if (buckets.length === 0) {
       dispatch(actions.showAlert({
         type: 'danger',
@@ -233,6 +250,13 @@ export default class Browse extends React.Component {
       }))
       return
     }
+    if (currentBucket === '') {
+      dispatch(actions.showAlert({
+        type: 'danger',
+        message: "Please choose a bucket before trying to upload files."
+      }))
+      return
+    }
     let file = e.target.files[0]
     e.target.value = null
     this.xhr = new XMLHttpRequest()
@@ -433,8 +457,7 @@ export default class Browse extends React.Component {
     } else {
       web.CreateURLToken()
         .then(res => {
-          let requestUrl = location.origin + "/minio/zip?token=" + res.token
-
+          let requestUrl = location.origin + minioBrowserPrefix + "/zip?token=" + res.token
           this.xhr = new XMLHttpRequest()
           dispatch(actions.downloadSelected(requestUrl, req, this.xhr))
         })
@@ -503,7 +526,7 @@ export default class Browse extends React.Component {
                                 settingsFunc={ this.showSettings.bind(this) }
                                 logoutFunc={ this.logout.bind(this) } />
     } else {
-      loginButton = <a className='btn btn-danger' href='/minio/login'>Login</a>
+      loginButton = <a className='btn btn-danger' href={minioBrowserPrefix+'/login'}>Login</a>
     }
 
     if (web.LoggedIn()) {
@@ -578,7 +601,9 @@ export default class Browse extends React.Component {
         <SideBar searchBuckets={ this.searchBuckets.bind(this) }
           selectBucket={ this.selectBucket.bind(this) }
           clickOutside={ this.hideSidebar.bind(this) }
-          showPolicy={ this.showBucketPolicy.bind(this) } />
+          showPolicy={ this.showBucketPolicy.bind(this) }
+          deleteBucket={ this.deleteBucket.bind(this) }
+          toggleBucketDropdown={ this.toggleBucketDropdown.bind(this) } />
         <div className="fe-body">
           <div className={ 'list-actions' + (classNames({
                              ' list-actions-toggled': checkedObjects.length > 0

browser/app/js/components/SideBar.js

@@ -21,8 +21,9 @@ import Scrollbars from 'react-custom-scrollbars/lib/Scrollbars'
 import connect from 'react-redux/lib/components/connect'
 
 import logo from '../../img/logo.svg'
+import Dropdown from 'react-bootstrap/lib/Dropdown'
 
-let SideBar = ({visibleBuckets, loadBucket, currentBucket, selectBucket, searchBuckets, sidebarStatus, clickOutside, showPolicy}) => {
+let SideBar = ({visibleBuckets, loadBucket, currentBucket, selectBucket, searchBuckets, sidebarStatus, clickOutside, showPolicy, deleteBucket, toggleBucketDropdown, showBucketDropdown}) => {
 
   const list = visibleBuckets.map((bucket, i) => {
     return <li className={ classNames({
@@ -33,7 +34,19 @@ let SideBar = ({visibleBuckets, loadBucket, currentBucket, selectBucket, searchB
                                     }) }>
                { bucket }
              </a>
-             <i className="fesli-trigger" onClick={ showPolicy }></i>
+             <Dropdown open={bucket === currentBucket && showBucketDropdown} onToggle={toggleBucketDropdown} className="bucket-dropdown" id="bucket-dropdown">
+               <Dropdown.Toggle noCaret>
+                 <i className="zmdi zmdi-more-vert" />
+               </Dropdown.Toggle>
+               <Dropdown.Menu className="dropdown-menu-right">
+                 <li>
+                   <a onClick={ showPolicy }>Edit policy</a>
+                 </li>
+                 <li>
+                   <a onClick={ (e) => deleteBucket(e, bucket) }>Delete</a>
+                 </li>
+               </Dropdown.Menu>
+             </Dropdown>
            </li>
   })
 
@@ -80,6 +93,7 @@ export default connect(state => {
     visibleBuckets: state.visibleBuckets,
     loadBucket: state.loadBucket,
     currentBucket: state.currentBucket,
+    showBucketDropdown: state.showBucketDropdown,
     sidebarStatus: state.sidebarStatus
   }
 })(SideBar)

browser/app/js/constants.js

@@ -17,7 +17,9 @@
 // File for all the browser constants.
 
 // minioBrowserPrefix absolute path.
-export const minioBrowserPrefix = '/minio'
+var p = window.location.pathname
+export const minioBrowserPrefix = p.slice(0, p.indexOf("/", 1))
+
 export const READ_ONLY = 'readonly'
 export const WRITE_ONLY = 'writeonly'
 export const READ_WRITE = 'readwrite'

browser/app/js/reducers.js

@@ -25,6 +25,7 @@ export default (state = {
     storageInfo: {},
     serverInfo: {},
     currentBucket: '',
+    showBucketDropdown: false,
     currentPath: '',
     showMakeBucketModal: false,
     uploads: {},
@@ -71,6 +72,14 @@ export default (state = {
       newState.buckets = [action.bucket, ...newState.buckets]
       newState.visibleBuckets = [action.bucket, ...newState.visibleBuckets]
       break
+    case actions.REMOVE_BUCKET:
+      newState.buckets = newState.buckets.filter(bucket => bucket != action.bucket)
+      newState.visibleBuckets = newState.visibleBuckets.filter(bucket => bucket != action.bucket)
+      newState.currentBucket = ""
+      break
+    case actions.SHOW_BUCKET_DROPDOWN:
+      newState.showBucketDropdown = action.showBucketDropdown
+      break
     case actions.SET_VISIBLE_BUCKETS:
       newState.visibleBuckets = action.visibleBuckets
       break

browser/app/js/web.js

@@ -87,6 +87,9 @@ export default class Web {
   MakeBucket(args) {
     return this.makeCall('MakeBucket', args)
   }
+  DeleteBucket(args) {
+    return this.makeCall('DeleteBucket', args)
+  }
   ListObjects(args) {
     return this.makeCall('ListObjects', args)
   }

browser/app/less/inc/file-explorer.less

@@ -14,7 +14,7 @@
 
 .fe-body {
 	@media(min-width: @screen-md-min) {
-		padding: 0 0 40px @fe-sidebar-width;
+		padding: 0 0 80px @fe-sidebar-width;
 	}
 
 	@media(max-width: @screen-sm-max) {
@@ -79,7 +79,7 @@
 	text-align: center;
 	border: 0;
 	padding: 0;
-	
+
 	span {
 		display: inline-block;
 		height: 100%;

browser/app/less/inc/list.less

@@ -108,7 +108,7 @@ div.fesl-row {
     &[data-type=zip] { .list-type(#427089, '\f1c6'); }
     &[data-type=audio] { .list-type(#009688, '\f1c7'); }
     &[data-type=code] { .list-type(#997867, "\f1c9"); }
-    &[data-type=excel] { .list-type(#f1c3, '\f1c3'); }
+    &[data-type=excel] { .list-type(#64c866, '\f1c3'); }
     &[data-type=image] { .list-type(#f06292, '\f1c5'); }
     &[data-type=video] { .list-type(#f8c363, '\f1c8'); }
     &[data-type=other] { .list-type(#afafaf, '\f016'); }
@@ -159,7 +159,7 @@ div.fesl-row {
         top: 0;
         width: 35px;
         height: 35px;
-        z-index: 20;
+        z-index: 8;
         opacity: 0;
         cursor: pointer;
 
@@ -223,7 +223,7 @@ div.fesl-row {
         width: 15px;
         height: 15px;
         border: 2px solid @white;
-        z-index: 10;
+        z-index: 7;
         border-radius: 2px;
         top: 10px;
         left: 10px;

browser/app/less/inc/sidebar.less

@@ -111,7 +111,7 @@
 		}
 
 		&:hover {
-			.fesli-trigger {
+			.bucket-dropdown .dropdown-toggle {
 				.opacity(0.6);
 
 				&:hover {
@@ -132,17 +132,40 @@
 	}
 }
 
-.fesli-trigger {
-	.opacity(0);
-	.transition(all);
-	.transition-duration(200ms);
+/* Dropdown */
+.bucket-dropdown {
 	position: absolute;
-	top: 0;
-	right: 0;
+	top: 0px;
+	right: 0px;
 	width: 35px;
 	height: 100%;
 	cursor: pointer;
-	background: url(../../img/more-h-light.svg) no-repeat top 20px left;
+	color: @white;
+
+	.dropdown-toggle {
+		.opacity(0);
+		.transition(all);
+		.transition-duration(200ms);
+		font-size: 20px;
+		background-color: transparent;
+	}
+
+	.dropdown-menu-right {
+		padding: 15px 0;
+		margin-top: -1px;
+		& li {
+			a:before {
+				content: none;
+				-webkit-box-shadow: @dropdown-shadow;
+				box-shadow: @dropdown-shadow;	
+			}
+			&:not(.active):hover {
+				& > a {
+					color: @dropdown-link-hover-color;
+				}
+			}
+		}
+	}
 }
 
 /* Scrollbar */

browser/package.json

@@ -60,6 +60,7 @@
     "humanize": "0.0.9",
     "json-loader": "^0.5.4",
     "local-storage-fallback": "^1.3.0",
+    "material-design-iconic-font": "^2.2.0",
     "mime-db": "^1.25.0",
     "mime-types": "^2.1.13",
     "moment": "^2.15.1",

buildscripts/build.sh

@@ -1,110 +0,0 @@
-#!/bin/bash
-
-_init() {
-    # Save release LDFLAGS
-    LDFLAGS=$(go run buildscripts/gen-ldflags.go)
-
-    # Extract release tag
-    release_tag=$(echo $LDFLAGS | awk {'print $6'} | cut -f2 -d=)
-
-    # Verify release tag.
-    if [ -z "$release_tag" ]; then
-        echo "Release tag cannot be empty. Please check return value of \`go run buildscripts/gen-ldflags.go\`"
-        exit 1;
-    fi
-
-    # Extract release string.
-    release_str=$(echo $MINIO_RELEASE | tr '[:upper:]' '[:lower:]')
-
-    # Verify release string.
-    if [ -z "$release_str" ]; then
-        echo "Release string cannot be empty. Please set \`MINIO_RELEASE\` env variable."
-        exit 1;
-    fi
-
-    # List of supported architectures
-    SUPPORTED_OSARCH='linux/amd64 windows/amd64 darwin/amd64'
-
-    ## System binaries
-    CP=`which cp`
-    SHASUM=`which shasum`
-    SHA256SUM="${SHASUM} -a 256"
-    SED=`which sed`
-}
-
-go_build() {
-    local osarch=$1
-    os=$(echo $osarch | cut -f1 -d'/')
-    arch=$(echo $osarch | cut -f2 -d'/')
-    package=$(go list -f '{{.ImportPath}}')
-    echo -n "-->"
-    printf "%15s:%s\n" "${osarch}" "${package}"
-
-    # Release binary name
-    release_bin="$release_str/$os-$arch/$(basename $package).$release_tag"
-    # Release binary downloadable name
-    release_real_bin="$release_str/$os-$arch/$(basename $package)"
-
-    # Release sha1sum name
-    release_shasum="$release_str/$os-$arch/$(basename $package).${release_tag}.shasum"
-    # Release sha1sum default
-    release_shasum_default="$release_str/$os-$arch/$(basename $package).shasum"
-
-    # Release sha256sum name
-    release_sha256sum="$release_str/$os-$arch/$(basename $package).${release_tag}.sha256sum"
-    # Release sha256sum default
-    release_sha256sum_default="$release_str/$os-$arch/$(basename $package).sha256sum"
-
-    # Go build to build the binary.
-    CGO_ENABLED=0 GOOS=$os GOARCH=$arch go build --ldflags "${LDFLAGS}" -o $release_bin
-
-    # Create copy
-    if [ $os == "windows" ]; then
-        $CP -p $release_bin ${release_real_bin}.exe
-    else
-        $CP -p $release_bin $release_real_bin
-    fi
-
-    # Calculate sha1sum
-    shasum_str=$(${SHASUM} ${release_bin})
-    echo ${shasum_str} | $SED "s/$release_str\/$os-$arch\///g" > $release_shasum
-    $CP -p $release_shasum $release_shasum_default
-
-    # Calculate sha256sum
-    sha256sum_str=$(${SHA256SUM} ${release_bin})
-    echo ${sha256sum_str} | $SED "s/$release_str\/$os-$arch\///g" > $release_sha256sum
-    $CP -p $release_sha256sum $release_sha256sum_default
-}
-
-main() {
-    # Build releases.
-    echo "Executing $release_str builds for OS: ${SUPPORTED_OSARCH}"
-    echo  "Choose an OS Arch from the below"
-    for osarch in ${SUPPORTED_OSARCH}; do
-        echo ${osarch}
-    done
-
-    read -p "If you want to build for all, Just press Enter: " chosen_osarch
-    if [ "$chosen_osarch" = "" ] || [ "$chosen_osarch" = "all" ]; then
-        for each_osarch in ${SUPPORTED_OSARCH}; do
-            go_build ${each_osarch}
-        done
-    else
-        local found=0
-        for each_osarch in ${SUPPORTED_OSARCH}; do
-            if [ "$chosen_osarch" = "$each_osarch" ]; then
-                found=1
-            fi
-        done
-        if [ ${found} -eq 1 ]; then
-            go_build ${chosen_osarch}
-        else
-            echo "Unknown architecture \"${chosen_osarch}\""
-            exit 1
-        fi
-    fi
-
-}
-
-# Run main.
-_init && main

buildscripts/checkdeps.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Minio Cloud Storage, (C) 2014-2016 Minio, Inc.
+# Minio Cloud Storage, (C) 2014-2018 Minio, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -21,7 +21,7 @@ _init() {
 
     ## Minimum required versions for build dependencies
     GIT_VERSION="1.0"
-    GO_VERSION="1.9.1"
+    GO_VERSION="1.9.4"
     OSX_VERSION="10.8"
     KNAME=$(uname -s)
     ARCH=$(uname -m)
@@ -93,9 +93,7 @@ assert_is_supported_arch() {
             return
             ;;
         *)
-            echo "ERROR"
-            echo "Arch '${ARCH}' not supported."
-            echo "Supported Arch: [x86_64, amd64, aarch64, arm*]"
+            echo "Arch '${ARCH}' is not supported. Supported Arch: [x86_64, amd64, aarch64, arm*]"
             exit 1
     esac
 }
@@ -108,41 +106,31 @@ assert_is_supported_os() {
         Darwin )
             osx_host_version=$(env sw_vers -productVersion)
             if ! check_minimum_version "${OSX_VERSION}" "${osx_host_version}"; then
-                echo "ERROR"
-                echo "OSX version '${osx_host_version}' not supported."
-                echo "Minimum supported version: ${OSX_VERSION}"
+                echo "OSX version '${osx_host_version}' is not supported. Minimum supported version: ${OSX_VERSION}"
                 exit 1
             fi
             return
             ;;
         *)
-            echo "ERROR"
-            echo "OS '${KNAME}' is not supported."
-            echo "Supported OS: [Linux, FreeBSD, OpenBSD, NetBSD, Darwin, DragonFly]"
+            echo "OS '${KNAME}' is not supported. Supported OS: [Linux, FreeBSD, OpenBSD, NetBSD, Darwin, DragonFly]"
             exit 1
     esac
 }
 
 assert_check_golang_env() {
     if ! which go >/dev/null 2>&1; then
-        echo "ERROR"
-        echo "Cannot find go binary in your PATH configuration, please refer to Go installation document at"
-        echo "https://docs.minio.io/docs/how-to-install-golang"
+        echo "Cannot find go binary in your PATH configuration, please refer to Go installation document at https://docs.minio.io/docs/how-to-install-golang"
         exit 1
     fi
 
     installed_go_version=$(go version | sed 's/^.* go\([0-9.]*\).*$/\1/')
     if ! check_minimum_version "${GO_VERSION}" "${installed_go_version}"; then
-        echo "ERROR"
-        echo "Go version '${installed_go_version}' not supported."
-        echo "Minimum supported version: ${GO_VERSION}"
+        echo "Go runtime version '${installed_go_version}' is unsupported. Minimum supported version: ${GO_VERSION} to compile."
         exit 1
     fi
 
     if [ -z "${GOPATH}" ]; then
-        echo "ERROR"
-        echo "GOPATH environment variable missing, please refer to Go installation document"
-        echo "https://docs.minio.io/docs/how-to-install-golang"
+        echo "GOPATH environment variable missing, please refer to Go installation document at https://docs.minio.io/docs/how-to-install-golang"
         exit 1
     fi
 
@@ -152,9 +140,7 @@ assert_check_deps() {
     # support unusual Git versions such as: 2.7.4 (Apple Git-66)
     installed_git_version=$(git version | perl -ne '$_ =~ m/git version (.*?)( |$)/; print "$1\n";')
     if ! check_minimum_version "${GIT_VERSION}" "${installed_git_version}"; then
-        echo "ERROR"
-        echo "Git version '${installed_git_version}' not supported."
-        echo "Minimum supported version: ${GIT_VERSION}"
+        echo "Git version '${installed_git_version}' is not supported. Minimum supported version: ${GIT_VERSION}"
         exit 1
     fi
 }

buildscripts/go-coverage.sh

@@ -3,8 +3,8 @@
 set -e
 echo "" > coverage.txt
 
-for d in $(go list ./... | grep -v vendor); do
-    go test -coverprofile=profile.out -covermode=atomic $d
+for d in $(go list ./... | grep -v browser); do
+    go test -coverprofile=profile.out -covermode=atomic "$d"
     if [ -f profile.out ]; then
         cat profile.out >> coverage.txt
         rm profile.out

buildscripts/verify-build.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Minio Cloud Storage, (C) 2017 Minio, Inc.
+# Minio Cloud Storage, (C) 2017, 2018 Minio, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -45,21 +45,58 @@ function start_minio_fs()
 {
     "${MINIO[@]}" server "${WORK_DIR}/fs-disk" >"$WORK_DIR/fs-minio.log" 2>&1 &
     minio_pid=$!
-    sleep 3
+    sleep 10
 
     echo "$minio_pid"
 }
 
-function start_minio_xl()
+function start_minio_erasure()
 {
-    "${MINIO[@]}" server "${WORK_DIR}/xl-disk1" "${WORK_DIR}/xl-disk2" "${WORK_DIR}/xl-disk3" "${WORK_DIR}/xl-disk4" >"$WORK_DIR/xl-minio.log" 2>&1 &
+    "${MINIO[@]}" server "${WORK_DIR}/erasure-disk1" "${WORK_DIR}/erasure-disk2" "${WORK_DIR}/erasure-disk3" "${WORK_DIR}/erasure-disk4" >"$WORK_DIR/erasure-minio.log" 2>&1 &
     minio_pid=$!
-    sleep 3
+    sleep 15
 
     echo "$minio_pid"
 }
 
-function start_minio_dist()
+function start_minio_erasure_sets()
+{
+    "${MINIO[@]}" server "${WORK_DIR}/erasure-disk-sets{1...32}" >"$WORK_DIR/erasure-minio-sets.log" 2>&1 &
+    minio_pid=$!
+    sleep 15
+
+    echo "$minio_pid"
+}
+
+function start_minio_dist_erasure_sets()
+{
+    declare -a minio_pids
+    "${MINIO[@]}" server --address=:9000 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9000.log" 2>&1 &
+    minio_pids[0]=$!
+    "${MINIO[@]}" server --address=:9001 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9001.log" 2>&1 &
+    minio_pids[1]=$!
+    "${MINIO[@]}" server --address=:9002 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9002.log" 2>&1 &
+    minio_pids[2]=$!
+    "${MINIO[@]}" server --address=:9003 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9003.log" 2>&1 &
+    minio_pids[3]=$!
+    "${MINIO[@]}" server --address=:9004 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9004.log" 2>&1 &
+    minio_pids[4]=$!
+    "${MINIO[@]}" server --address=:9005 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9005.log" 2>&1 &
+    minio_pids[5]=$!
+    "${MINIO[@]}" server --address=:9006 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9006.log" 2>&1 &
+    minio_pids[6]=$!
+    "${MINIO[@]}" server --address=:9007 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9007.log" 2>&1 &
+    minio_pids[7]=$!
+    "${MINIO[@]}" server --address=:9008 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9008.log" 2>&1 &
+    minio_pids[8]=$!
+    "${MINIO[@]}" server --address=:9009 "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets4" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets5" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets6" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets7" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets8" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets9" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets10" "http://127.0.0.1:9000${WORK_DIR}/dist-disk-sets11" "http://127.0.0.1:9001${WORK_DIR}/dist-disk-sets12" "http://127.0.0.1:9002${WORK_DIR}/dist-disk-sets13" "http://127.0.0.1:9003${WORK_DIR}/dist-disk-sets14" "http://127.0.0.1:9004${WORK_DIR}/dist-disk-sets15" "http://127.0.0.1:9005${WORK_DIR}/dist-disk-sets16" "http://127.0.0.1:9006${WORK_DIR}/dist-disk-sets17" "http://127.0.0.1:9007${WORK_DIR}/dist-disk-sets18" "http://127.0.0.1:9008${WORK_DIR}/dist-disk-sets19" "http://127.0.0.1:9009${WORK_DIR}/dist-disk-sets20" >"$WORK_DIR/dist-minio-9009.log" 2>&1 &
+    minio_pids[9]=$!
+
+    sleep 30
+    echo "${minio_pids[@]}"
+}
+
+function start_minio_dist_erasure()
 {
     declare -a minio_pids
     "${MINIO[@]}" server --address=:9000 "http://127.0.0.1:9000${WORK_DIR}/dist-disk1" "http://127.0.0.1:9001${WORK_DIR}/dist-disk2" "http://127.0.0.1:9002${WORK_DIR}/dist-disk3" "http://127.0.0.1:9003${WORK_DIR}/dist-disk4" >"$WORK_DIR/dist-minio-9000.log" 2>&1 &
@@ -103,9 +140,8 @@ function run_test_fs()
     return "$rv"
 }
 
-function run_test_xl()
-{
-    minio_pid="$(start_minio_xl)"
+function run_test_erasure_sets() {
+    minio_pid="$(start_minio_erasure_sets)"
 
     (cd "$WORK_DIR" && "$FUNCTIONAL_TESTS")
     rv=$?
@@ -114,16 +150,60 @@ function run_test_xl()
     sleep 3
 
     if [ "$rv" -ne 0 ]; then
-        cat "$WORK_DIR/xl-minio.log"
+        cat "$WORK_DIR/erasure-minio-sets.log"
     fi
-    rm -f "$WORK_DIR/xl-minio.log"
+    rm -f "$WORK_DIR/erasure-minio-sets.log"
 
     return "$rv"
 }
 
-function run_test_dist()
+function run_test_dist_erasure_sets()
 {
-    minio_pids=( $(start_minio_dist) )
+    minio_pids=( $(start_minio_dist_erasure_sets) )
+
+    (cd "$WORK_DIR" && "$FUNCTIONAL_TESTS")
+    rv=$?
+
+    for pid in "${minio_pids[@]}"; do
+        kill "$pid"
+    done
+    sleep 3
+
+    if [ "$rv" -ne 0 ]; then
+        for i in $(seq 0 9); do
+            echo "server$i log:"
+            cat "$WORK_DIR/dist-minio-900$i.log"
+        done
+    fi
+
+    for i in $(seq 0 9); do
+        rm -f "$WORK_DIR/dist-minio-900$i.log"
+    done
+
+    return "$rv"
+}
+
+function run_test_erasure()
+{
+    minio_pid="$(start_minio_erasure)"
+
+    (cd "$WORK_DIR" && "$FUNCTIONAL_TESTS")
+    rv=$?
+
+    kill "$minio_pid"
+    sleep 3
+
+    if [ "$rv" -ne 0 ]; then
+        cat "$WORK_DIR/erasure-minio.log"
+    fi
+    rm -f "$WORK_DIR/erasure-minio.log"
+
+    return "$rv"
+}
+
+function run_test_dist_erasure()
+{
+    minio_pids=( $(start_minio_dist_erasure) )
 
     (cd "$WORK_DIR" && "$FUNCTIONAL_TESTS")
     rv=$?
@@ -144,7 +224,7 @@ function run_test_dist()
         cat "$WORK_DIR/dist-minio-9003.log"
     fi
 
-    rm -f "$WORK_DIR/dist-minio-9000.log" "$WORK_DIR/dist-minio-9001.log" "$WORK_DIR/dist-minio-9002.log" "$WORK_DIR/dist-minio-9003.log" 
+    rm -f "$WORK_DIR/dist-minio-9000.log" "$WORK_DIR/dist-minio-9001.log" "$WORK_DIR/dist-minio-9002.log" "$WORK_DIR/dist-minio-9003.log"
 
    return "$rv"
 }
@@ -207,15 +287,29 @@ function main()
         exit 1
     fi
 
-    echo "Testing in XL setup"
-    if ! run_test_xl; then
+    echo "Testing in Erasure setup"
+    if ! run_test_erasure; then
         echo "FAILED"
         rm -fr "$WORK_DIR"
         exit 1
     fi
 
-    echo "Testing in Distribute XL setup"
-    if ! run_test_dist; then
+    echo "Testing in Distributed Erasure setup"
+    if ! run_test_dist_erasure; then
+        echo "FAILED"
+        rm -fr "$WORK_DIR"
+        exit 1
+    fi
+
+    echo "Testing in Erasure setup as sets"
+    if ! run_test_erasure_sets; then
+        echo "FAILED"
+        rm -fr "$WORK_DIR"
+        exit 1
+    fi
+
+    echo "Testing in Distributed Erasure setup as sets"
+    if ! run_test_dist_erasure_sets; then
         echo "FAILED"
         rm -fr "$WORK_DIR"
         exit 1

cmd/admin-heal-ops.go

@@ -0,0 +1,654 @@
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/minio/minio/pkg/madmin"
+)
+
+// healStatusSummary - overall short summary of a healing sequence
+type healStatusSummary string
+
+// healStatusSummary constants
+const (
+	healNotStartedStatus healStatusSummary = "not started"
+	healRunningStatus                      = "running"
+	healStoppedStatus                      = "stopped"
+	healFinishedStatus                     = "finished"
+)
+
+const (
+	// a heal sequence with this many un-consumed heal result
+	// items blocks until heal-status consumption resumes or is
+	// aborted due to timeout.
+	maxUnconsumedHealResultItems = 1000
+
+	// if no heal-results are consumed (via the heal-status API)
+	// for this timeout duration, the heal sequence is aborted.
+	healUnconsumedTimeout = 24 * time.Hour
+
+	// time-duration to keep heal sequence state after it
+	// completes.
+	keepHealSeqStateDuration = time.Minute * 10
+)
+
+var (
+	errHealIdleTimeout      = fmt.Errorf("healing results were not consumed for too long")
+	errHealPushStopNDiscard = fmt.Errorf("heal push stopped due to heal stop signal")
+	errHealStopSignalled    = fmt.Errorf("heal stop signalled")
+
+	errFnHealFromAPIErr = func(err error) error {
+		errCode := toAPIErrorCode(err)
+		apiErr := getAPIError(errCode)
+		return fmt.Errorf("Heal internal error: %s: %s",
+			apiErr.Code, apiErr.Description)
+	}
+)
+
+// healSequenceStatus - accumulated status of the heal sequence
+type healSequenceStatus struct {
+	// lock to update this structure as it is concurrently
+	// accessed
+	updateLock *sync.RWMutex
+
+	// summary and detail for failures
+	Summary       healStatusSummary `json:"Summary"`
+	FailureDetail string            `json:"Detail,omitempty"`
+	StartTime     time.Time         `json:"StartTime"`
+
+	// disk information
+	NumDisks int `json:"NumDisks"`
+
+	// settings for the heal sequence
+	HealSettings madmin.HealOpts `json:"Settings"`
+
+	// slice of available heal result records
+	Items []madmin.HealResultItem `json:"Items"`
+}
+
+// structure to hold state of all heal sequences in server memory
+type allHealState struct {
+	sync.Mutex
+
+	// map of heal path to heal sequence
+	healSeqMap map[string]*healSequence
+}
+
+var (
+	// global server heal state
+	globalAllHealState allHealState
+)
+
+// initAllHealState - initialize healing apparatus
+func initAllHealState(isErasureMode bool) {
+	if !isErasureMode {
+		return
+	}
+
+	globalAllHealState = allHealState{
+		healSeqMap: make(map[string]*healSequence),
+	}
+}
+
+// getHealSequence - Retrieve a heal sequence by path. The second
+// argument returns if a heal sequence actually exists.
+func (ahs *allHealState) getHealSequence(path string) (h *healSequence, exists bool) {
+	ahs.Lock()
+	defer ahs.Unlock()
+	h, exists = ahs.healSeqMap[path]
+	return h, exists
+}
+
+// LaunchNewHealSequence - launches a background routine that performs
+// healing according to the healSequence argument. For each heal
+// sequence, state is stored in the `globalAllHealState`, which is a
+// map of the heal path to `healSequence` which holds state about the
+// heal sequence.
+//
+// Heal results are persisted in server memory for
+// `keepHealSeqStateDuration`. This function also launches a
+// background routine to clean up heal results after the
+// aforementioned duration.
+func (ahs *allHealState) LaunchNewHealSequence(h *healSequence) (
+	respBytes []byte, errCode APIErrorCode, errMsg string) {
+
+	existsAndLive := false
+	he, exists := ahs.getHealSequence(h.path)
+	if exists {
+		if !he.hasEnded() || len(he.currentStatus.Items) > 0 {
+			existsAndLive = true
+		}
+	}
+	if existsAndLive {
+		// A heal sequence exists on the given path.
+		if h.forceStarted {
+			// stop the running heal sequence - wait for
+			// it to finish.
+			he.stop()
+			for !he.hasEnded() {
+				time.Sleep(10 * time.Second)
+			}
+		} else {
+			errMsg = "Heal is already running on the given path " +
+				"(use force-start option to stop and start afresh). " +
+				fmt.Sprintf("The heal was started by IP %s at %s",
+					h.clientAddress, h.startTime)
+
+			return nil, ErrHealAlreadyRunning, errMsg
+		}
+	}
+
+	ahs.Lock()
+	defer ahs.Unlock()
+
+	// Check if new heal sequence to be started overlaps with any
+	// existing, running sequence
+	for k, hSeq := range ahs.healSeqMap {
+		if !hSeq.hasEnded() && (strings.HasPrefix(k, h.path) ||
+			strings.HasPrefix(h.path, k)) {
+
+			errMsg = "The provided heal sequence path overlaps with an existing " +
+				fmt.Sprintf("heal path: %s", k)
+			return nil, ErrHealOverlappingPaths, errMsg
+		}
+	}
+
+	// Add heal state and start sequence
+	ahs.healSeqMap[h.path] = h
+
+	// Launch top-level background heal go-routine
+	go h.healSequenceStart()
+
+	// Launch clean-up routine to remove this heal sequence (after
+	// it ends) from the global state after timeout has elapsed.
+	go func() {
+		var keepStateTimeout <-chan time.Time
+		ticker := time.NewTicker(time.Minute)
+		defer ticker.Stop()
+		everyMinute := ticker.C
+		for {
+			select {
+			// Check every minute if heal sequence has ended.
+			case <-everyMinute:
+				if h.hasEnded() {
+					keepStateTimeout = time.After(keepHealSeqStateDuration)
+					everyMinute = nil
+				}
+
+			// This case does not fire until the heal
+			// sequence completes.
+			case <-keepStateTimeout:
+				// Heal sequence has ended, keep
+				// results state duration has elapsed,
+				// so purge state.
+				ahs.Lock()
+				defer ahs.Unlock()
+				delete(ahs.healSeqMap, h.path)
+				return
+
+			case <-globalServiceDoneCh:
+				// server could be restarting - need
+				// to exit immediately
+				return
+			}
+		}
+	}()
+
+	b, err := json.Marshal(madmin.HealStartSuccess{
+		h.clientToken,
+		h.clientAddress,
+		h.startTime,
+	})
+	if err != nil {
+		errorIf(err, "Failed to marshal heal result into json.")
+		return nil, ErrInternalError, ""
+	}
+	return b, ErrNone, ""
+}
+
+// PopHealStatusJSON - Called by heal-status API. It fetches the heal
+// status results from global state and returns its JSON
+// representation. The clientToken helps ensure there aren't
+// conflicting clients fetching status.
+func (ahs *allHealState) PopHealStatusJSON(path string,
+	clientToken string) ([]byte, APIErrorCode) {
+
+	// fetch heal state for given path
+	h, exists := ahs.getHealSequence(path)
+	if !exists {
+		// If there is no such heal sequence, return error.
+		return nil, ErrHealNoSuchProcess
+	}
+
+	// Check if client-token is valid
+	if clientToken != h.clientToken {
+		return nil, ErrHealInvalidClientToken
+	}
+
+	// Take lock to access and update the heal-sequence
+	h.currentStatus.updateLock.Lock()
+	defer h.currentStatus.updateLock.Unlock()
+
+	numItems := len(h.currentStatus.Items)
+
+	// calculate index of most recently available heal result
+	// record.
+	lastResultIndex := h.lastSentResultIndex
+	if numItems > 0 {
+		lastResultIndex = h.currentStatus.Items[numItems-1].ResultIndex
+	}
+
+	// After sending status to client, and before relinquishing
+	// the updateLock, reset Item to nil and record the result
+	// index sent to the client.
+	defer func(i int64) {
+		h.lastSentResultIndex = i
+		h.currentStatus.Items = nil
+	}(lastResultIndex)
+
+	jbytes, err := json.Marshal(h.currentStatus)
+	if err != nil {
+		errorIf(err, "Failed to marshal heal result into json.")
+		return nil, ErrInternalError
+	}
+
+	return jbytes, ErrNone
+}
+
+// healSequence - state for each heal sequence initiated on the
+// server.
+type healSequence struct {
+	// bucket, and prefix on which heal seq. was initiated
+	bucket, objPrefix string
+
+	// path is just bucket + "/" + objPrefix
+	path string
+
+	// time at which heal sequence was started
+	startTime time.Time
+
+	// Heal client info
+	clientToken, clientAddress string
+
+	// was this heal sequence force started?
+	forceStarted bool
+
+	// heal settings applied to this heal sequence
+	settings madmin.HealOpts
+
+	// current accumulated status of the heal sequence
+	currentStatus healSequenceStatus
+
+	// channel signalled by background routine when traversal has
+	// completed
+	traverseAndHealDoneCh chan error
+
+	// channel to signal heal sequence to stop (e.g. from the
+	// heal-stop API)
+	stopSignalCh chan struct{}
+
+	// the last result index sent to client
+	lastSentResultIndex int64
+}
+
+// NewHealSequence - creates healSettings, assumes bucket and
+// objPrefix are already validated.
+func newHealSequence(bucket, objPrefix, clientAddr string,
+	numDisks int, hs madmin.HealOpts, forceStart bool) *healSequence {
+
+	return &healSequence{
+		bucket:        bucket,
+		objPrefix:     objPrefix,
+		path:          bucket + "/" + objPrefix,
+		startTime:     UTCNow(),
+		clientToken:   mustGetUUID(),
+		clientAddress: clientAddr,
+		forceStarted:  forceStart,
+		settings:      hs,
+		currentStatus: healSequenceStatus{
+			Summary:      healNotStartedStatus,
+			HealSettings: hs,
+			NumDisks:     numDisks,
+			updateLock:   &sync.RWMutex{},
+		},
+		traverseAndHealDoneCh: make(chan error),
+		stopSignalCh:          make(chan struct{}),
+	}
+}
+
+// isQuitting - determines if the heal sequence is quitting (due to an
+// external signal)
+func (h *healSequence) isQuitting() bool {
+	select {
+	case <-h.stopSignalCh:
+		return true
+	default:
+		return false
+	}
+}
+
+// check if the heal sequence has ended
+func (h *healSequence) hasEnded() bool {
+	h.currentStatus.updateLock.RLock()
+	summary := h.currentStatus.Summary
+	h.currentStatus.updateLock.RUnlock()
+	return summary == healStoppedStatus || summary == healFinishedStatus
+}
+
+// stops the heal sequence - safe to call multiple times.
+func (h *healSequence) stop() {
+	select {
+	case <-h.stopSignalCh:
+	default:
+		close(h.stopSignalCh)
+	}
+}
+
+// pushHealResultItem - pushes a heal result item for consumption in
+// the heal-status API. It blocks if there are
+// maxUnconsumedHealResultItems. When it blocks, the heal sequence
+// routine is effectively paused - this happens when the server has
+// accumulated the maximum number of heal records per heal
+// sequence. When the client consumes further records, the heal
+// sequence automatically resumes. The return value indicates if the
+// operation succeeded.
+func (h *healSequence) pushHealResultItem(r madmin.HealResultItem) error {
+
+	// start a timer to keep an upper time limit to find an empty
+	// slot to add the given heal result - if no slot is found it
+	// means that the server is holding the maximum amount of
+	// heal-results in memory and the client has not consumed it
+	// for too long.
+	unconsumedTimer := time.NewTimer(healUnconsumedTimeout)
+	defer func() {
+		// stop the timeout timer so it is garbage collected.
+		if !unconsumedTimer.Stop() {
+			<-unconsumedTimer.C
+		}
+	}()
+
+	var itemsLen int
+	for {
+		h.currentStatus.updateLock.Lock()
+		itemsLen = len(h.currentStatus.Items)
+		if itemsLen == maxUnconsumedHealResultItems {
+			// unlock and wait to check again if we can push
+			h.currentStatus.updateLock.Unlock()
+
+			// wait for a second, or quit if an external
+			// stop signal is received or the
+			// unconsumedTimer fires.
+			select {
+			// Check after a second
+			case <-time.After(time.Second):
+				continue
+
+			case <-h.stopSignalCh:
+				// discard result and return.
+				return errHealPushStopNDiscard
+
+			// Timeout if no results consumed for too
+			// long.
+			case <-unconsumedTimer.C:
+				return errHealIdleTimeout
+
+			}
+		}
+		break
+	}
+
+	// Set the correct result index for the new result item
+	if itemsLen > 0 {
+		r.ResultIndex = 1 + h.currentStatus.Items[itemsLen-1].ResultIndex
+	} else {
+		r.ResultIndex = 1 + h.lastSentResultIndex
+	}
+
+	// append to results
+	h.currentStatus.Items = append(h.currentStatus.Items, r)
+
+	// release lock
+	h.currentStatus.updateLock.Unlock()
+
+	// This is a "safe" point for the heal sequence to quit if
+	// signalled externally.
+	if h.isQuitting() {
+		return errHealStopSignalled
+	}
+
+	return nil
+}
+
+// healSequenceStart - this is the top-level background heal
+// routine. It launches another go-routine that actually traverses
+// on-disk data, checks and heals according to the selected
+// settings. This go-routine itself, (1) monitors the traversal
+// routine for completion, and (2) listens for external stop
+// signals. When either event happens, it sets the finish status for
+// the heal-sequence.
+func (h *healSequence) healSequenceStart() {
+	// Set status as running
+	h.currentStatus.updateLock.Lock()
+	h.currentStatus.Summary = healRunningStatus
+	h.currentStatus.StartTime = UTCNow()
+	h.currentStatus.updateLock.Unlock()
+
+	go h.traverseAndHeal()
+
+	select {
+	case err, ok := <-h.traverseAndHealDoneCh:
+		h.currentStatus.updateLock.Lock()
+		defer h.currentStatus.updateLock.Unlock()
+		// Heal traversal is complete.
+		if ok {
+			// heal traversal had an error.
+			h.currentStatus.Summary = healStoppedStatus
+			h.currentStatus.FailureDetail = err.Error()
+		} else {
+			// heal traversal succeeded.
+			h.currentStatus.Summary = healFinishedStatus
+		}
+
+	case <-h.stopSignalCh:
+		h.currentStatus.updateLock.Lock()
+		h.currentStatus.Summary = healStoppedStatus
+		h.currentStatus.FailureDetail = errHealStopSignalled.Error()
+		h.currentStatus.updateLock.Unlock()
+
+		// drain traverse channel so the traversal
+		// go-routine does not leak.
+		go func() {
+			// Eventually the traversal go-routine closes
+			// the channel and returns, so this go-routine
+			// itself will not leak.
+			<-h.traverseAndHealDoneCh
+		}()
+	}
+}
+
+// traverseAndHeal - traverses on-disk data and performs healing
+// according to settings. At each "safe" point it also checks if an
+// external quit signal has been received and quits if so. Since the
+// healing traversal may be mutating on-disk data when an external
+// quit signal is received, this routine cannot quit immediately and
+// has to wait until a safe point is reached, such as between scanning
+// two objects.
+func (h *healSequence) traverseAndHeal() {
+	var err error
+	checkErr := func(f func() error) {
+		switch {
+		case err != nil:
+			return
+		case h.isQuitting():
+			err = errHealStopSignalled
+			return
+		}
+		err = f()
+	}
+
+	// Start with format healing
+	checkErr(h.healDiskFormat)
+
+	// Heal buckets and objects
+	checkErr(h.healBuckets)
+
+	if err != nil {
+		h.traverseAndHealDoneCh <- err
+	}
+
+	close(h.traverseAndHealDoneCh)
+}
+
+// healDiskFormat - heals format.json, return value indicates if a
+// failure error occurred.
+func (h *healSequence) healDiskFormat() error {
+	// Get current object layer instance.
+	objectAPI := newObjectLayerFn()
+	if objectAPI == nil {
+		return errServerNotInitialized
+	}
+
+	res, err := objectAPI.HealFormat(h.settings.DryRun)
+	if err != nil {
+		return errFnHealFromAPIErr(err)
+	}
+
+	peersReInitFormat(globalAdminPeers, h.settings.DryRun)
+
+	// Push format heal result
+	return h.pushHealResultItem(res)
+}
+
+// healBuckets - check for all buckets heal or just particular bucket.
+func (h *healSequence) healBuckets() error {
+	// 1. If a bucket was specified, heal only the bucket.
+	if h.bucket != "" {
+		return h.healBucket(h.bucket)
+	}
+
+	// Get current object layer instance.
+	objectAPI := newObjectLayerFn()
+	if objectAPI == nil {
+		return errServerNotInitialized
+	}
+
+	buckets, err := objectAPI.ListBucketsHeal()
+	if err != nil {
+		return errFnHealFromAPIErr(err)
+	}
+
+	for _, bucket := range buckets {
+		if err = h.healBucket(bucket.Name); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// healBucket - traverses and heals given bucket
+func (h *healSequence) healBucket(bucket string) error {
+	if h.isQuitting() {
+		return errHealStopSignalled
+	}
+
+	// Get current object layer instance.
+	objectAPI := newObjectLayerFn()
+	if objectAPI == nil {
+		return errServerNotInitialized
+	}
+
+	bucketLock := globalNSMutex.NewNSLock(bucket, "")
+	if err := bucketLock.GetLock(globalHealingTimeout); err != nil {
+		return err
+	}
+
+	results, err := objectAPI.HealBucket(bucket, h.settings.DryRun)
+	// push any available results before checking for error
+	for _, result := range results {
+		if perr := h.pushHealResultItem(result); perr != nil {
+			bucketLock.Unlock()
+			return perr
+		}
+	}
+	bucketLock.Unlock()
+	// handle heal-bucket error
+	if err != nil {
+		return err
+	}
+
+	if !h.settings.Recursive {
+		if h.objPrefix != "" {
+			// Check if an object named as the objPrefix exists,
+			// and if so heal it.
+			_, err = objectAPI.GetObjectInfo(bucket, h.objPrefix)
+			if err == nil {
+				err = h.healObject(bucket, h.objPrefix)
+				if err != nil {
+					return err
+				}
+			}
+		}
+
+		return nil
+	}
+
+	marker := ""
+	isTruncated := true
+	for isTruncated {
+		objectInfos, err := objectAPI.ListObjectsHeal(bucket,
+			h.objPrefix, marker, "", 1000)
+		if err != nil {
+			return errFnHealFromAPIErr(err)
+		}
+
+		for _, o := range objectInfos.Objects {
+			if err := h.healObject(o.Bucket, o.Name); err != nil {
+				return err
+			}
+		}
+
+		isTruncated = objectInfos.IsTruncated
+		marker = objectInfos.NextMarker
+	}
+	return nil
+}
+
+// healObject - heal the given object and record result
+func (h *healSequence) healObject(bucket, object string) error {
+	if h.isQuitting() {
+		return errHealStopSignalled
+	}
+
+	// Get current object layer instance.
+	objectAPI := newObjectLayerFn()
+	if objectAPI == nil {
+		return errServerNotInitialized
+	}
+
+	hri, err := objectAPI.HealObject(bucket, object, h.settings.DryRun)
+	if err != nil {
+		hri.Detail = err.Error()
+	}
+	return h.pushHealResultItem(hri)
+}

cmd/admin-router.go

@@ -16,7 +16,15 @@
 
 package cmd
 
-import router "github.com/gorilla/mux"
+import (
+	"net/http"
+
+	router "github.com/gorilla/mux"
+)
+
+const (
+	adminAPIPathPrefix = "/minio/admin"
+)
 
 // adminAPIHandlers provides HTTP handlers for Minio admin API.
 type adminAPIHandlers struct {
@@ -27,50 +35,44 @@ func registerAdminRouter(mux *router.Router) {
 
 	adminAPI := adminAPIHandlers{}
 	// Admin router
-	adminRouter := mux.NewRoute().PathPrefix("/").Subrouter()
+	adminRouter := mux.NewRoute().PathPrefix(adminAPIPathPrefix).Subrouter()
+
+	// Version handler
+	adminRouter.Methods(http.MethodGet).Path("/version").HandlerFunc(adminAPI.VersionHandler)
+
+	adminV1Router := adminRouter.PathPrefix("/v1").Subrouter()
 
 	/// Service operations
 
 	// Service status
-	adminRouter.Methods("GET").Queries("service", "").Headers(minioAdminOpHeader, "status").HandlerFunc(adminAPI.ServiceStatusHandler)
+	adminV1Router.Methods(http.MethodGet).Path("/service").HandlerFunc(adminAPI.ServiceStatusHandler)
 
-	// Service restart
-	adminRouter.Methods("POST").Queries("service", "").Headers(minioAdminOpHeader, "restart").HandlerFunc(adminAPI.ServiceRestartHandler)
-	// Service update credentials
-	adminRouter.Methods("POST").Queries("service", "").Headers(minioAdminOpHeader, "set-credentials").HandlerFunc(adminAPI.ServiceCredentialsHandler)
+	// Service restart and stop - TODO
+	adminV1Router.Methods(http.MethodPost).Path("/service").HandlerFunc(adminAPI.ServiceStopNRestartHandler)
 
 	// Info operations
-	adminRouter.Methods("GET").Queries("info", "").HandlerFunc(adminAPI.ServerInfoHandler)
+	adminV1Router.Methods(http.MethodGet).Path("/info").HandlerFunc(adminAPI.ServerInfoHandler)
 
 	/// Lock operations
 
 	// List Locks
-	adminRouter.Methods("GET").Queries("lock", "").Headers(minioAdminOpHeader, "list").HandlerFunc(adminAPI.ListLocksHandler)
+	adminV1Router.Methods(http.MethodGet).Path("/locks").HandlerFunc(adminAPI.ListLocksHandler)
 	// Clear locks
-	adminRouter.Methods("POST").Queries("lock", "").Headers(minioAdminOpHeader, "clear").HandlerFunc(adminAPI.ClearLocksHandler)
+	adminV1Router.Methods(http.MethodDelete).Path("/locks").HandlerFunc(adminAPI.ClearLocksHandler)
 
 	/// Heal operations
 
-	// List Objects needing heal.
-	adminRouter.Methods("GET").Queries("heal", "").Headers(minioAdminOpHeader, "list-objects").HandlerFunc(adminAPI.ListObjectsHealHandler)
-	// List Uploads needing heal.
-	adminRouter.Methods("GET").Queries("heal", "").Headers(minioAdminOpHeader, "list-uploads").HandlerFunc(adminAPI.ListUploadsHealHandler)
-	// List Buckets needing heal.
-	adminRouter.Methods("GET").Queries("heal", "").Headers(minioAdminOpHeader, "list-buckets").HandlerFunc(adminAPI.ListBucketsHealHandler)
-
-	// Heal Buckets.
-	adminRouter.Methods("POST").Queries("heal", "").Headers(minioAdminOpHeader, "bucket").HandlerFunc(adminAPI.HealBucketHandler)
-	// Heal Objects.
-	adminRouter.Methods("POST").Queries("heal", "").Headers(minioAdminOpHeader, "object").HandlerFunc(adminAPI.HealObjectHandler)
-	// Heal Format.
-	adminRouter.Methods("POST").Queries("heal", "").Headers(minioAdminOpHeader, "format").HandlerFunc(adminAPI.HealFormatHandler)
-	// Heal Uploads.
-	adminRouter.Methods("POST").Queries("heal", "").Headers(minioAdminOpHeader, "upload").HandlerFunc(adminAPI.HealUploadHandler)
+	// Heal processing endpoint.
+	adminV1Router.Methods(http.MethodPost).Path("/heal/").HandlerFunc(adminAPI.HealHandler)
+	adminV1Router.Methods(http.MethodPost).Path("/heal/{bucket}").HandlerFunc(adminAPI.HealHandler)
+	adminV1Router.Methods(http.MethodPost).Path("/heal/{bucket}/{prefix:.*}").HandlerFunc(adminAPI.HealHandler)
 
 	/// Config operations
 
+	// Update credentials
+	adminV1Router.Methods(http.MethodPut).Path("/config/credential").HandlerFunc(adminAPI.UpdateCredentialsHandler)
 	// Get config
-	adminRouter.Methods("GET").Queries("config", "").Headers(minioAdminOpHeader, "get").HandlerFunc(adminAPI.GetConfigHandler)
-	// Set Config
-	adminRouter.Methods("PUT").Queries("config", "").Headers(minioAdminOpHeader, "set").HandlerFunc(adminAPI.SetConfigHandler)
+	adminV1Router.Methods(http.MethodGet).Path("/config").HandlerFunc(adminAPI.GetConfigHandler)
+	// Set config
+	adminV1Router.Methods(http.MethodPut).Path("/config").HandlerFunc(adminAPI.SetConfigHandler)
 }

cmd/admin-rpc-client.go

@@ -18,25 +18,24 @@ package cmd
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"net"
 	"os"
 	"path"
 	"path/filepath"
-	"reflect"
 	"sort"
 	"sync"
 	"time"
 
 	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/minio/pkg/errors"
 )
 
 const (
 	// Admin service names
-	serviceRestartRPC = "Admin.Restart"
+	signalServiceRPC  = "Admin.SignalService"
+	reInitFormatRPC   = "Admin.ReInitFormat"
 	listLocksRPC      = "Admin.ListLocks"
-	reInitDisksRPC    = "Admin.ReInitDisks"
 	serverInfoDataRPC = "Admin.ServerInfoData"
 	getConfigRPC      = "Admin.GetConfig"
 	writeTmpConfigRPC = "Admin.WriteTmpConfig"
@@ -56,60 +55,75 @@ type remoteAdminClient struct {
 // adminCmdRunner - abstracts local and remote execution of admin
 // commands like service stop and service restart.
 type adminCmdRunner interface {
-	Restart() error
+	SignalService(s serviceSignal) error
+	ReInitFormat(dryRun bool) error
 	ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error)
-	ReInitDisks() error
 	ServerInfoData() (ServerInfoData, error)
 	GetConfig() ([]byte, error)
 	WriteTmpConfig(tmpFileName string, configBytes []byte) error
 	CommitConfig(tmpFileName string) error
 }
 
-// Restart - Sends a message over channel to the go-routine
-// responsible for restarting the process.
-func (lc localAdminClient) Restart() error {
-	globalServiceSignalCh <- serviceRestart
+var errUnsupportedSignal = fmt.Errorf("unsupported signal: only restart and stop signals are supported")
+
+// SignalService - sends a restart or stop signal to the local server
+func (lc localAdminClient) SignalService(s serviceSignal) error {
+	switch s {
+	case serviceRestart, serviceStop:
+		globalServiceSignalCh <- s
+	default:
+		return errUnsupportedSignal
+	}
 	return nil
 }
 
+// ReInitFormat - re-initialize disk format.
+func (lc localAdminClient) ReInitFormat(dryRun bool) error {
+	objectAPI := newObjectLayerFn()
+	if objectAPI == nil {
+		return errServerNotInitialized
+	}
+	_, err := objectAPI.HealFormat(dryRun)
+	return err
+}
+
 // ListLocks - Fetches lock information from local lock instrumentation.
 func (lc localAdminClient) ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error) {
 	return listLocksInfo(bucket, prefix, duration), nil
 }
 
-// Restart - Sends restart command to remote server via RPC.
-func (rc remoteAdminClient) Restart() error {
-	args := AuthRPCArgs{}
+func (rc remoteAdminClient) SignalService(s serviceSignal) (err error) {
+	switch s {
+	case serviceRestart, serviceStop:
+		reply := AuthRPCReply{}
+		err = rc.Call(signalServiceRPC, &SignalServiceArgs{Sig: s},
+			&reply)
+	default:
+		err = errUnsupportedSignal
+	}
+	return err
+}
+
+// ReInitFormat - re-initialize disk format, remotely.
+func (rc remoteAdminClient) ReInitFormat(dryRun bool) error {
 	reply := AuthRPCReply{}
-	return rc.Call(serviceRestartRPC, &args, &reply)
+	return rc.Call(reInitFormatRPC, &ReInitFormatArgs{
+		DryRun: dryRun,
+	}, &reply)
 }
 
 // ListLocks - Sends list locks command to remote server via RPC.
 func (rc remoteAdminClient) ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error) {
 	listArgs := ListLocksQuery{
-		bucket:   bucket,
-		prefix:   prefix,
-		duration: duration,
+		Bucket:   bucket,
+		Prefix:   prefix,
+		Duration: duration,
 	}
 	var reply ListLocksReply
 	if err := rc.Call(listLocksRPC, &listArgs, &reply); err != nil {
 		return nil, err
 	}
-	return reply.volLocks, nil
-}
-
-// ReInitDisks - There is nothing to do here, heal format REST API
-// handler has already formatted and reinitialized the local disks.
-func (lc localAdminClient) ReInitDisks() error {
-	return nil
-}
-
-// ReInitDisks - Signals peers via RPC to reinitialize their disks and
-// object layer.
-func (rc remoteAdminClient) ReInitDisks() error {
-	args := AuthRPCArgs{}
-	reply := AuthRPCReply{}
-	return rc.Call(reInitDisksRPC, &args, &reply)
+	return reply.VolLocks, nil
 }
 
 // ServerInfoData - Returns the server info of this server.
@@ -139,7 +153,7 @@ func (lc localAdminClient) ServerInfoData() (sid ServerInfoData, e error) {
 			Version:  Version,
 			CommitID: CommitID,
 			SQSARN:   arns,
-			Region:   serverConfig.GetRegion(),
+			Region:   globalServerConfig.GetRegion(),
 		},
 	}, nil
 }
@@ -158,11 +172,11 @@ func (rc remoteAdminClient) ServerInfoData() (sid ServerInfoData, e error) {
 
 // GetConfig - returns config.json of the local server.
 func (lc localAdminClient) GetConfig() ([]byte, error) {
-	if serverConfig == nil {
-		return nil, errors.New("config not present")
+	if globalServerConfig == nil {
+		return nil, fmt.Errorf("config not present")
 	}
 
-	return json.Marshal(serverConfig)
+	return json.Marshal(globalServerConfig)
 }
 
 // GetConfig - returns config.json of the remote server.
@@ -225,10 +239,11 @@ func (rc remoteAdminClient) CommitConfig(tmpFileName string) error {
 	return nil
 }
 
-// adminPeer - represents an entity that implements Restart methods.
+// adminPeer - represents an entity that implements admin API RPCs.
 type adminPeer struct {
 	addr      string
 	cmdRunner adminCmdRunner
+	isLocal   bool
 }
 
 // type alias for a collection of adminPeer.
@@ -243,10 +258,11 @@ func makeAdminPeers(endpoints EndpointList) (adminPeerList adminPeers) {
 	adminPeerList = append(adminPeerList, adminPeer{
 		thisPeer,
 		localAdminClient{},
+		true,
 	})
 
 	hostSet := set.CreateStringSet(globalMinioAddr)
-	cred := serverConfig.GetCredential()
+	cred := globalServerConfig.GetCredential()
 	serviceEndpoint := path.Join(minioReservedBucketPath, adminPath)
 	for _, host := range GetRemotePeers(endpoints) {
 		if hostSet.Contains(host) {
@@ -269,16 +285,36 @@ func makeAdminPeers(endpoints EndpointList) (adminPeerList adminPeers) {
 	return adminPeerList
 }
 
+// peersReInitFormat - reinitialize remote object layers to new format.
+func peersReInitFormat(peers adminPeers, dryRun bool) error {
+	errs := make([]error, len(peers))
+
+	// Send ReInitFormat RPC call to all nodes.
+	// for local adminPeer this is a no-op.
+	wg := sync.WaitGroup{}
+	for i, peer := range peers {
+		wg.Add(1)
+		go func(idx int, peer adminPeer) {
+			defer wg.Done()
+			if !peer.isLocal {
+				errs[idx] = peer.cmdRunner.ReInitFormat(dryRun)
+			}
+		}(i, peer)
+	}
+	wg.Wait()
+	return nil
+}
+
 // Initialize global adminPeer collection.
 func initGlobalAdminPeers(endpoints EndpointList) {
 	globalAdminPeers = makeAdminPeers(endpoints)
 }
 
-// invokeServiceCmd - Invoke Restart command.
+// invokeServiceCmd - Invoke Restart/Stop command.
 func invokeServiceCmd(cp adminPeer, cmd serviceSignal) (err error) {
 	switch cmd {
-	case serviceRestart:
-		err = cp.cmdRunner.Restart()
+	case serviceRestart, serviceStop:
+		err = cp.cmdRunner.SignalService(cmd)
 	}
 	return err
 }
@@ -352,24 +388,6 @@ func listPeerLocksInfo(peers adminPeers, bucket, prefix string, duration time.Du
 	return groupedLockInfos, nil
 }
 
-// reInitPeerDisks - reinitialize disks and object layer on peer servers to use the new format.
-func reInitPeerDisks(peers adminPeers) error {
-	errs := make([]error, len(peers))
-
-	// Send ReInitDisks RPC call to all nodes.
-	// for local adminPeer this is a no-op.
-	wg := sync.WaitGroup{}
-	for i, peer := range peers {
-		wg.Add(1)
-		go func(idx int, peer adminPeer) {
-			defer wg.Done()
-			errs[idx] = peer.cmdRunner.ReInitDisks()
-		}(i, peer)
-	}
-	wg.Wait()
-	return nil
-}
-
 // uptimeSlice - used to sort uptimes in chronological order.
 type uptimeSlice []struct {
 	err    error
@@ -466,7 +484,7 @@ func getPeerConfig(peers adminPeers) ([]byte, error) {
 	// Find the maximally occurring config among peers in a
 	// distributed setup.
 
-	serverConfigs := make([]serverConfigV13, len(peers))
+	serverConfigs := make([]serverConfig, len(peers))
 	for i, configBytes := range configs {
 		if errs[i] != nil {
 			continue
@@ -483,7 +501,7 @@ func getPeerConfig(peers adminPeers) ([]byte, error) {
 	configJSON, err := getValidServerConfig(serverConfigs, errs)
 	if err != nil {
 		errorIf(err, "Unable to find a valid server config")
-		return nil, traceError(err)
+		return nil, errors.Trace(err)
 	}
 
 	// Return the config.json that was present quorum or more
@@ -493,7 +511,7 @@ func getPeerConfig(peers adminPeers) ([]byte, error) {
 
 // getValidServerConfig - finds the server config that is present in
 // quorum or more number of servers.
-func getValidServerConfig(serverConfigs []serverConfigV13, errs []error) (scv serverConfigV13, e error) {
+func getValidServerConfig(serverConfigs []serverConfig, errs []error) (scv serverConfig, e error) {
 	// majority-based quorum
 	quorum := len(serverConfigs)/2 + 1
 
@@ -536,7 +554,7 @@ func getValidServerConfig(serverConfigs []serverConfigV13, errs []error) (scv se
 				// seen. See example above for
 				// clarity.
 				continue
-			} else if j < i && reflect.DeepEqual(serverConfigs[i], serverConfigs[j]) {
+			} else if j < i && serverConfigs[i].ConfigDiff(&serverConfigs[j]) == "" {
 				// serverConfigs[i] is equal to
 				// serverConfigs[j], update
 				// serverConfigs[j]'s counter since it
@@ -555,7 +573,7 @@ func getValidServerConfig(serverConfigs []serverConfigV13, errs []error) (scv se
 
 	// We find the maximally occurring server config and check if
 	// there is quorum.
-	var configJSON serverConfigV13
+	var configJSON serverConfig
 	maxOccurrence := 0
 	for i, count := range configCounter {
 		if maxOccurrence < count {

cmd/admin-rpc-client_test.go

@@ -220,7 +220,7 @@ var (
 
 // TestGetValidServerConfig - test for getValidServerConfig.
 func TestGetValidServerConfig(t *testing.T) {
-	var c1, c2 serverConfigV13
+	var c1, c2 serverConfig
 	err := json.Unmarshal(config1, &c1)
 	if err != nil {
 		t.Fatalf("json unmarshal of %s failed: %v", string(config1), err)
@@ -233,7 +233,7 @@ func TestGetValidServerConfig(t *testing.T) {
 
 	// Valid config.
 	noErrs := []error{nil, nil, nil, nil}
-	serverConfigs := []serverConfigV13{c1, c2, c1, c1}
+	serverConfigs := []serverConfig{c1, c2, c1, c1}
 	validConfig, err := getValidServerConfig(serverConfigs, noErrs)
 	if err != nil {
 		t.Errorf("Expected a valid config but received %v instead", err)
@@ -244,7 +244,7 @@ func TestGetValidServerConfig(t *testing.T) {
 	}
 
 	// Invalid config - no quorum.
-	serverConfigs = []serverConfigV13{c1, c2, c2, c1}
+	serverConfigs = []serverConfig{c1, c2, c2, c1}
 	_, err = getValidServerConfig(serverConfigs, noErrs)
 	if err != errXLWriteQuorum {
 		t.Errorf("Expected to fail due to lack of quorum but received %v", err)
@@ -252,7 +252,7 @@ func TestGetValidServerConfig(t *testing.T) {
 
 	// All errors
 	allErrs := []error{errDiskNotFound, errDiskNotFound, errDiskNotFound, errDiskNotFound}
-	serverConfigs = []serverConfigV13{{}, {}, {}, {}}
+	serverConfigs = []serverConfig{{}, {}, {}, {}}
 	_, err = getValidServerConfig(serverConfigs, allErrs)
 	if err != errXLWriteQuorum {
 		t.Errorf("Expected to fail due to lack of quorum but received %v", err)

cmd/admin-rpc-server.go

@@ -18,7 +18,6 @@ package cmd
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -26,30 +25,35 @@ import (
 	"time"
 
 	router "github.com/gorilla/mux"
+	"github.com/minio/minio/pkg/errors"
 )
 
 const adminPath = "/admin"
 
-var errUnsupportedBackend = errors.New("not supported for non erasure-code backend")
-
 // adminCmd - exports RPC methods for service status, stop and
 // restart commands.
 type adminCmd struct {
 	AuthRPCServer
 }
 
+// SignalServiceArgs - provides the signal argument to SignalService RPC
+type SignalServiceArgs struct {
+	AuthRPCArgs
+	Sig serviceSignal
+}
+
 // ListLocksQuery - wraps ListLocks API's query values to send over RPC.
 type ListLocksQuery struct {
 	AuthRPCArgs
-	bucket   string
-	prefix   string
-	duration time.Duration
+	Bucket   string
+	Prefix   string
+	Duration time.Duration
 }
 
 // ListLocksReply - wraps ListLocks response over RPC.
 type ListLocksReply struct {
 	AuthRPCReply
-	volLocks []VolumeLockInfo
+	VolLocks []VolumeLockInfo
 }
 
 // ServerInfoDataReply - wraps the server info response over RPC.
@@ -64,60 +68,38 @@ type ConfigReply struct {
 	Config []byte // json-marshalled bytes of serverConfigV13
 }
 
-// Restart - Restart this instance of minio server.
-func (s *adminCmd) Restart(args *AuthRPCArgs, reply *AuthRPCReply) error {
+// SignalService - Send a restart or stop signal to the service
+func (s *adminCmd) SignalService(args *SignalServiceArgs, reply *AuthRPCReply) error {
 	if err := args.IsAuthenticated(); err != nil {
 		return err
 	}
 
-	globalServiceSignalCh <- serviceRestart
+	globalServiceSignalCh <- args.Sig
 	return nil
 }
 
+// ReInitFormatArgs - provides dry-run information to re-initialize format.json
+type ReInitFormatArgs struct {
+	AuthRPCArgs
+	DryRun bool
+}
+
+// ReInitFormat - re-init 'format.json'
+func (s *adminCmd) ReInitFormat(args *ReInitFormatArgs, reply *AuthRPCReply) error {
+	if err := args.IsAuthenticated(); err != nil {
+		return err
+	}
+	_, err := newObjectLayerFn().HealFormat(args.DryRun)
+	return err
+}
+
 // ListLocks - lists locks held by requests handled by this server instance.
 func (s *adminCmd) ListLocks(query *ListLocksQuery, reply *ListLocksReply) error {
 	if err := query.IsAuthenticated(); err != nil {
 		return err
 	}
-	volLocks := listLocksInfo(query.bucket, query.prefix, query.duration)
-	*reply = ListLocksReply{volLocks: volLocks}
-	return nil
-}
-
-// ReInitDisk - reinitialize storage disks and object layer to use the
-// new format.
-func (s *adminCmd) ReInitDisks(args *AuthRPCArgs, reply *AuthRPCReply) error {
-	if err := args.IsAuthenticated(); err != nil {
-		return err
-	}
-
-	if !globalIsXL {
-		return errUnsupportedBackend
-	}
-
-	// Get the current object layer instance.
-	objLayer := newObjectLayerFn()
-
-	// Initialize new disks to include the newly formatted disks.
-	bootstrapDisks, err := initStorageDisks(globalEndpoints)
-	if err != nil {
-		return err
-	}
-
-	// Initialize new object layer with newly formatted disks.
-	newObjectAPI, err := newXLObjects(bootstrapDisks)
-	if err != nil {
-		return err
-	}
-
-	// Replace object layer with newly formatted storage.
-	globalObjLayerMutex.Lock()
-	globalObjectAPI = newObjectAPI
-	globalObjLayerMutex.Unlock()
-
-	// Shutdown storage belonging to old object layer instance.
-	objLayer.Shutdown()
-
+	volLocks := listLocksInfo(query.Bucket, query.Prefix, query.Duration)
+	*reply = ListLocksReply{VolLocks: volLocks}
 	return nil
 }
 
@@ -148,7 +130,7 @@ func (s *adminCmd) ServerInfoData(args *AuthRPCArgs, reply *ServerInfoDataReply)
 			Uptime:   UTCNow().Sub(globalBootTime),
 			Version:  Version,
 			CommitID: CommitID,
-			Region:   serverConfig.GetRegion(),
+			Region:   globalServerConfig.GetRegion(),
 			SQSARN:   arns,
 		},
 		StorageInfo: storageInfo,
@@ -165,11 +147,11 @@ func (s *adminCmd) GetConfig(args *AuthRPCArgs, reply *ConfigReply) error {
 		return err
 	}
 
-	if serverConfig == nil {
-		return errors.New("config not present")
+	if globalServerConfig == nil {
+		return fmt.Errorf("config not present")
 	}
 
-	jsonBytes, err := json.Marshal(serverConfig)
+	jsonBytes, err := json.Marshal(globalServerConfig)
 	if err != nil {
 		return err
 	}
@@ -238,7 +220,7 @@ func registerAdminRPCRouter(mux *router.Router) error {
 	adminRPCServer := newRPCServer()
 	err := adminRPCServer.RegisterName("Admin", adminRPCHandler)
 	if err != nil {
-		return traceError(err)
+		return errors.Trace(err)
 	}
 	adminRouter := mux.NewRoute().PathPrefix(minioReservedBucketPath).Subrouter()
 	adminRouter.Path(adminPath).Handler(adminRPCServer)

cmd/admin-rpc-server_test.go

@@ -23,8 +23,8 @@ import (
 )
 
 func testAdminCmd(cmd cmdType, t *testing.T) {
-	// reset globals.
-	// this is to make sure that the tests are not affected by modified globals.
+	// reset globals. this is to make sure that the tests are not
+	// affected by modified globals.
 	resetTestGlobals()
 
 	rootPath, err := newTestConfig(globalMinioDefaultRegion)
@@ -33,7 +33,7 @@ func testAdminCmd(cmd cmdType, t *testing.T) {
 	}
 	defer os.RemoveAll(rootPath)
 
-	creds := serverConfig.GetCredential()
+	creds := globalServerConfig.GetCredential()
 	token, err := authenticateNode(creds.AccessKey, creds.SecretKey)
 	if err != nil {
 		t.Fatal(err)
@@ -42,7 +42,7 @@ func testAdminCmd(cmd cmdType, t *testing.T) {
 	adminServer := adminCmd{}
 	args := LoginRPCArgs{
 		AuthToken:   token,
-		Version:     Version,
+		Version:     globalRPCAPIVersion,
 		RequestTime: UTCNow(),
 	}
 	err = adminServer.Login(&args, &LoginRPCReply{})
@@ -55,12 +55,23 @@ func testAdminCmd(cmd cmdType, t *testing.T) {
 		<-globalServiceSignalCh
 	}()
 
-	ga := AuthRPCArgs{AuthToken: token}
+	sa := SignalServiceArgs{
+		AuthRPCArgs: AuthRPCArgs{AuthToken: token, Version: globalRPCAPIVersion},
+		Sig:         cmd.toServiceSignal(),
+	}
+
 	genReply := AuthRPCReply{}
 	switch cmd {
-	case restartCmd:
-		if err = adminServer.Restart(&ga, &genReply); err != nil {
-			t.Errorf("restartCmd: Expected: <nil>, got: %v", err)
+	case restartCmd, stopCmd:
+		if err = adminServer.SignalService(&sa, &genReply); err != nil {
+			t.Errorf("restartCmd/stopCmd: Expected: <nil>, got: %v",
+				err)
+		}
+	default:
+		err = adminServer.SignalService(&sa, &genReply)
+		if err != nil && err.Error() != errUnsupportedSignal.Error() {
+			t.Errorf("invalidSignal %s: unexpected error got: %v",
+				cmd, err)
 		}
 	}
 }
@@ -70,8 +81,18 @@ func TestAdminRestart(t *testing.T) {
 	testAdminCmd(restartCmd, t)
 }
 
-// TestReInitDisks - test for Admin.ReInitDisks RPC service.
-func TestReInitDisks(t *testing.T) {
+// TestAdminStop - test for Admin.Stop RPC service.
+func TestAdminStop(t *testing.T) {
+	testAdminCmd(stopCmd, t)
+}
+
+// TestAdminStatus - test for Admin.Status RPC service (error case)
+func TestAdminStatus(t *testing.T) {
+	testAdminCmd(statusCmd, t)
+}
+
+// TestReInitFormat - test for Admin.ReInitFormat RPC service.
+func TestReInitFormat(t *testing.T) {
 	// Reset global variables to start afresh.
 	resetTestGlobals()
 
@@ -95,7 +116,7 @@ func TestReInitDisks(t *testing.T) {
 	globalIsXL = true
 	adminServer := adminCmd{}
 
-	creds := serverConfig.GetCredential()
+	creds := globalServerConfig.GetCredential()
 	token, err := authenticateNode(creds.AccessKey, creds.SecretKey)
 	if err != nil {
 		t.Fatal(err)
@@ -103,7 +124,7 @@ func TestReInitDisks(t *testing.T) {
 
 	args := LoginRPCArgs{
 		AuthToken:   token,
-		Version:     Version,
+		Version:     globalRPCAPIVersion,
 		RequestTime: UTCNow(),
 	}
 	err = adminServer.Login(&args, &LoginRPCReply{})
@@ -113,42 +134,17 @@ func TestReInitDisks(t *testing.T) {
 
 	authArgs := AuthRPCArgs{
 		AuthToken: token,
+		Version:   globalRPCAPIVersion,
 	}
 	authReply := AuthRPCReply{}
 
-	err = adminServer.ReInitDisks(&authArgs, &authReply)
+	err = adminServer.ReInitFormat(&ReInitFormatArgs{
+		AuthRPCArgs: authArgs,
+		DryRun:      false,
+	}, &authReply)
 	if err != nil {
 		t.Errorf("Expected to pass, but failed with %v", err)
 	}
-
-	token, err = authenticateNode(creds.AccessKey, creds.SecretKey)
-	if err != nil {
-		t.Fatal(err)
-	}
-	// Negative test case with admin rpc server setup for FS.
-	globalIsXL = false
-	fsAdminServer := adminCmd{}
-	fsArgs := LoginRPCArgs{
-		AuthToken:   token,
-		Version:     Version,
-		RequestTime: UTCNow(),
-	}
-	fsReply := LoginRPCReply{}
-	err = fsAdminServer.Login(&fsArgs, &fsReply)
-	if err != nil {
-		t.Fatalf("Failed to login to fs admin server - %v", err)
-	}
-
-	authArgs = AuthRPCArgs{
-		AuthToken: token,
-	}
-	authReply = AuthRPCReply{}
-	// Attempt ReInitDisks service on a FS backend.
-	err = fsAdminServer.ReInitDisks(&authArgs, &authReply)
-	if err != errUnsupportedBackend {
-		t.Errorf("Expected to fail with %v, but received %v",
-			errUnsupportedBackend, err)
-	}
 }
 
 // TestGetConfig - Test for GetConfig admin RPC.
@@ -163,7 +159,7 @@ func TestGetConfig(t *testing.T) {
 	defer os.RemoveAll(rootPath)
 
 	adminServer := adminCmd{}
-	creds := serverConfig.GetCredential()
+	creds := globalServerConfig.GetCredential()
 
 	token, err := authenticateNode(creds.AccessKey, creds.SecretKey)
 	if err != nil {
@@ -172,7 +168,7 @@ func TestGetConfig(t *testing.T) {
 
 	args := LoginRPCArgs{
 		AuthToken:   token,
-		Version:     Version,
+		Version:     globalRPCAPIVersion,
 		RequestTime: UTCNow(),
 	}
 	reply := LoginRPCReply{}
@@ -183,6 +179,7 @@ func TestGetConfig(t *testing.T) {
 
 	authArgs := AuthRPCArgs{
 		AuthToken: token,
+		Version:   globalRPCAPIVersion,
 	}
 
 	configReply := ConfigReply{}
@@ -212,14 +209,14 @@ func TestWriteAndCommitConfig(t *testing.T) {
 	defer os.RemoveAll(rootPath)
 
 	adminServer := adminCmd{}
-	creds := serverConfig.GetCredential()
+	creds := globalServerConfig.GetCredential()
 	token, err := authenticateNode(creds.AccessKey, creds.SecretKey)
 	if err != nil {
 		t.Fatal(err)
 	}
 	args := LoginRPCArgs{
 		AuthToken:   token,
-		Version:     Version,
+		Version:     globalRPCAPIVersion,
 		RequestTime: UTCNow(),
 	}
 	reply := LoginRPCReply{}
@@ -234,6 +231,7 @@ func TestWriteAndCommitConfig(t *testing.T) {
 	wArgs := WriteConfigArgs{
 		AuthRPCArgs: AuthRPCArgs{
 			AuthToken: token,
+			Version:   globalRPCAPIVersion,
 		},
 		TmpFileName: tmpFileName,
 		Buf:         buf,
@@ -251,6 +249,7 @@ func TestWriteAndCommitConfig(t *testing.T) {
 	cArgs := CommitConfigArgs{
 		AuthRPCArgs: AuthRPCArgs{
 			AuthToken: token,
+			Version:   globalRPCAPIVersion,
 		},
 		FileName: tmpFileName,
 	}

cmd/api-errors.go

@@ -18,8 +18,11 @@ package cmd
 
 import (
 	"encoding/xml"
+	"fmt"
 	"net/http"
 
+	"github.com/minio/minio/pkg/auth"
+	"github.com/minio/minio/pkg/errors"
 	"github.com/minio/minio/pkg/hash"
 )
 
@@ -38,8 +41,8 @@ type APIErrorResponse struct {
 	Key        string
 	BucketName string
 	Resource   string
-	RequestID  string `xml:"RequestId"`
-	HostID     string `xml:"HostId"`
+	RequestID  string `xml:"RequestId" json:"RequestId"`
+	HostID     string `xml:"HostId" json:"HostId"`
 }
 
 // APIErrorCode type of error status.
@@ -119,8 +122,22 @@ const (
 	ErrBucketAlreadyExists
 	ErrMetadataTooLarge
 	ErrUnsupportedMetadata
+	ErrMaximumExpires
+	ErrSlowDown
+	ErrInvalidPrefixMarker
 	// Add new error codes here.
 
+	// Server-Side-Encryption (with Customer provided key) related API errors.
+	ErrInsecureSSECustomerRequest
+	ErrSSEMultipartEncrypted
+	ErrSSEEncryptedObject
+	ErrInvalidEncryptionParameters
+	ErrInvalidSSECustomerAlgorithm
+	ErrInvalidSSECustomerKey
+	ErrMissingSSECustomerKey
+	ErrMissingSSECustomerKeyMD5
+	ErrSSECustomerKeyMD5Mismatch
+
 	// Bucket notification related errors.
 	ErrEventNotification
 	ErrARNNotification
@@ -142,6 +159,7 @@ const (
 	ErrReadQuorum
 	ErrWriteQuorum
 	ErrStorageFull
+	ErrRequestBodyParse
 	ErrObjectExistsAsDirectory
 	ErrPolicyNesting
 	ErrInvalidObjectName
@@ -149,15 +167,30 @@ const (
 	ErrServerNotInitialized
 	ErrOperationTimedOut
 	ErrPartsSizeUnequal
+	ErrInvalidRequest
+
+	// Minio storage class error codes
+	ErrInvalidStorageClass
+
 	// Add new extended error codes here.
 	// Please open a https://github.com/minio/minio/issues before adding
 	// new error codes here.
 
+	ErrMalformedJSON
 	ErrAdminInvalidAccessKey
 	ErrAdminInvalidSecretKey
 	ErrAdminConfigNoQuorum
+	ErrAdminConfigTooLarge
+	ErrAdminConfigBadJSON
 	ErrAdminCredentialsMismatch
 	ErrInsecureClientRequest
+	ErrObjectTampered
+	ErrHealNotImplemented
+	ErrHealNoSuchProcess
+	ErrHealInvalidClientToken
+	ErrHealMissingBucket
+	ErrHealAlreadyRunning
+	ErrHealOverlappingPaths
 )
 
 // error code to APIError structure, these fields carry respective
@@ -178,6 +211,11 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Unknown metadata directive.",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
+	ErrInvalidStorageClass: {
+		Code:           "InvalidStorageClass",
+		Description:    "Invalid storage class.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrInvalidRequestBody: {
 		Code:           "InvalidArgument",
 		Description:    "Body shouldn't be set for this request.",
@@ -490,6 +528,17 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Request is not valid yet",
 		HTTPStatusCode: http.StatusForbidden,
 	},
+	ErrSlowDown: {
+		Code:           "SlowDown",
+		Description:    "Please reduce your request",
+		HTTPStatusCode: http.StatusServiceUnavailable,
+	},
+	ErrInvalidPrefixMarker: {
+		Code:           "InvalidPrefixMarker",
+		Description:    "Invalid marker prefix combination",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
 	// FIXME: Actual XML error response also contains the header which missed in list of signed header parameters.
 	ErrUnsignedHeaders: {
 		Code:           "AccessDenied",
@@ -573,6 +622,56 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Range specified is not valid for source object",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
+	ErrMetadataTooLarge: {
+		Code:           "InvalidArgument",
+		Description:    "Your metadata headers exceed the maximum allowed metadata size.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInsecureSSECustomerRequest: {
+		Code:           "InvalidRequest",
+		Description:    errInsecureSSERequest.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrSSEMultipartEncrypted: {
+		Code:           "InvalidRequest",
+		Description:    "The multipart upload initiate requested encryption. Subsequent part requests must include the appropriate encryption parameters.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrSSEEncryptedObject: {
+		Code:           "InvalidRequest",
+		Description:    errEncryptedObject.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidEncryptionParameters: {
+		Code:           "InvalidRequest",
+		Description:    "The encryption parameters are not applicable to this object.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidSSECustomerAlgorithm: {
+		Code:           "InvalidArgument",
+		Description:    errInvalidSSEAlgorithm.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrInvalidSSECustomerKey: {
+		Code:           "InvalidArgument",
+		Description:    errInvalidSSEKey.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingSSECustomerKey: {
+		Code:           "InvalidArgument",
+		Description:    errMissingSSEKey.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrMissingSSECustomerKeyMD5: {
+		Code:           "InvalidArgument",
+		Description:    errMissingSSEKeyMD5.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrSSECustomerKeyMD5Mismatch: {
+		Code:           "InvalidArgument",
+		Description:    errSSEKeyMD5Mismatch.Error(),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 
 	/// S3 extensions.
 	ErrContentSHA256Mismatch: {
@@ -587,6 +686,11 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Storage backend has reached its minimum free disk threshold. Please delete a few objects to proceed.",
 		HTTPStatusCode: http.StatusInternalServerError,
 	},
+	ErrRequestBodyParse: {
+		Code:           "XMinioRequestBodyParse",
+		Description:    "The request body failed to parse.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrObjectExistsAsDirectory: {
 		Code:           "XMinioObjectExistsAsDirectory",
 		Description:    "Object name already exists as a directory.",
@@ -622,6 +726,11 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Server not initialized, please try again.",
 		HTTPStatusCode: http.StatusServiceUnavailable,
 	},
+	ErrMalformedJSON: {
+		Code:           "XMinioMalformedJSON",
+		Description:    "The JSON you provided was not well-formed or did not validate against our published format.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrAdminInvalidAccessKey: {
 		Code:           "XMinioAdminInvalidAccessKey",
 		Description:    "The access key is invalid.",
@@ -637,6 +746,17 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Configuration update failed because server quorum was not met",
 		HTTPStatusCode: http.StatusServiceUnavailable,
 	},
+	ErrAdminConfigTooLarge: {
+		Code: "XMinioAdminConfigTooLarge",
+		Description: fmt.Sprintf("Configuration data provided exceeds the allowed maximum of %d bytes",
+			maxConfigJSONSize),
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrAdminConfigBadJSON: {
+		Code:           "XMinioAdminConfigBadJSON",
+		Description:    "JSON configuration provided has objects with duplicate keys",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrAdminCredentialsMismatch: {
 		Code:           "XMinioAdminCredentialsMismatch",
 		Description:    "Credentials in config mismatch with server environment variables",
@@ -652,11 +772,6 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "A timeout occurred while trying to lock a resource",
 		HTTPStatusCode: http.StatusRequestTimeout,
 	},
-	ErrMetadataTooLarge: {
-		Code:           "InvalidArgument",
-		Description:    "Your metadata headers exceed the maximum allowed metadata size.",
-		HTTPStatusCode: http.StatusBadRequest,
-	},
 	ErrUnsupportedMetadata: {
 		Code:           "InvalidArgument",
 		Description:    "Your metadata headers are not supported.",
@@ -667,6 +782,55 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "All parts except the last part should be of the same size.",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
+	ErrObjectTampered: {
+		Code:           "XMinioObjectTampered",
+		Description:    errObjectTampered.Error(),
+		HTTPStatusCode: http.StatusPartialContent,
+	},
+	ErrMaximumExpires: {
+		Code:           "AuthorizationQueryParametersError",
+		Description:    "X-Amz-Expires must be less than a week (in seconds); that is, the given X-Amz-Expires must be less than 604800 seconds",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	// Generic Invalid-Request error. Should be used for response errors only for unlikely
+	// corner case errors for which introducing new APIErrorCode is not worth it. errorIf()
+	// should be used to log the error at the source of the error for debugging purposes.
+	ErrInvalidRequest: {
+		Code:           "InvalidRequest",
+		Description:    "Invalid Request",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrHealNotImplemented: {
+		Code:           "XMinioHealNotImplemented",
+		Description:    "This server does not implement heal functionality.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrHealNoSuchProcess: {
+		Code:           "XMinioHealNoSuchProcess",
+		Description:    "No such heal process is running on the server",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrHealInvalidClientToken: {
+		Code:           "XMinioHealInvalidClientToken",
+		Description:    "Client token mismatch",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrHealMissingBucket: {
+		Code:           "XMinioHealMissingBucket",
+		Description:    "A heal start request with a non-empty object-prefix parameter requires a bucket to be specified.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrHealAlreadyRunning: {
+		Code:           "XMinioHealAlreadyRunning",
+		Description:    "",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+	ErrHealOverlappingPaths: {
+		Code:           "XMinioHealOverlappingPaths",
+		Description:    "",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
+
 	// Add your error structure here.
 }
 
@@ -678,7 +842,7 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 		return ErrNone
 	}
 
-	err = errorCause(err)
+	err = errors.Cause(err)
 	// Verify if the underlying error is signature mismatch.
 	switch err {
 	case errSignatureMismatch:
@@ -687,9 +851,9 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 		apiErr = ErrEntityTooLarge
 	case errDataTooSmall:
 		apiErr = ErrEntityTooSmall
-	case errInvalidAccessKeyLength:
+	case auth.ErrInvalidAccessKeyLength:
 		apiErr = ErrAdminInvalidAccessKey
-	case errInvalidSecretKeyLength:
+	case auth.ErrInvalidSecretKeyLength:
 		apiErr = ErrAdminInvalidSecretKey
 	}
 
@@ -698,6 +862,27 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 		return apiErr
 	}
 
+	switch err { // SSE errors
+	case errInsecureSSERequest:
+		return ErrInsecureSSECustomerRequest
+	case errInvalidSSEAlgorithm:
+		return ErrInvalidSSECustomerAlgorithm
+	case errInvalidSSEKey:
+		return ErrInvalidSSECustomerKey
+	case errMissingSSEKey:
+		return ErrMissingSSECustomerKey
+	case errMissingSSEKeyMD5:
+		return ErrMissingSSECustomerKeyMD5
+	case errSSEKeyMD5Mismatch:
+		return ErrSSECustomerKeyMD5Mismatch
+	case errObjectTampered:
+		return ErrObjectTampered
+	case errEncryptedObject:
+		return ErrSSEEncryptedObject
+	case errSSEKeyMismatch:
+		return ErrAccessDenied // no access without correct key
+	}
+
 	switch err.(type) {
 	case StorageFull:
 		apiErr = ErrStorageFull
@@ -763,6 +948,8 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 		apiErr = ErrUnsupportedMetadata
 	case PartsSizeUnequal:
 		apiErr = ErrPartsSizeUnequal
+	case BucketPolicyNotFound:
+		apiErr = ErrNoSuchBucketPolicy
 	default:
 		apiErr = ErrInternalError
 	}

cmd/api-errors_test.go

@@ -23,116 +23,48 @@ import (
 	"github.com/minio/minio/pkg/hash"
 )
 
+var toAPIErrorCodeTests = []struct {
+	err     error
+	errCode APIErrorCode
+}{
+	{err: hash.BadDigest{}, errCode: ErrBadDigest},
+	{err: hash.SHA256Mismatch{}, errCode: ErrContentSHA256Mismatch},
+	{err: IncompleteBody{}, errCode: ErrIncompleteBody},
+	{err: ObjectExistsAsDirectory{}, errCode: ErrObjectExistsAsDirectory},
+	{err: BucketNameInvalid{}, errCode: ErrInvalidBucketName},
+	{err: BucketExists{}, errCode: ErrBucketAlreadyOwnedByYou},
+	{err: ObjectNotFound{}, errCode: ErrNoSuchKey},
+	{err: ObjectNameInvalid{}, errCode: ErrInvalidObjectName},
+	{err: InvalidUploadID{}, errCode: ErrNoSuchUpload},
+	{err: InvalidPart{}, errCode: ErrInvalidPart},
+	{err: InsufficientReadQuorum{}, errCode: ErrReadQuorum},
+	{err: InsufficientWriteQuorum{}, errCode: ErrWriteQuorum},
+	{err: UnsupportedDelimiter{}, errCode: ErrNotImplemented},
+	{err: InvalidMarkerPrefixCombination{}, errCode: ErrNotImplemented},
+	{err: InvalidUploadIDKeyCombination{}, errCode: ErrNotImplemented},
+	{err: MalformedUploadID{}, errCode: ErrNoSuchUpload},
+	{err: PartTooSmall{}, errCode: ErrEntityTooSmall},
+	{err: BucketNotEmpty{}, errCode: ErrBucketNotEmpty},
+	{err: BucketNotFound{}, errCode: ErrNoSuchBucket},
+	{err: StorageFull{}, errCode: ErrStorageFull},
+	{err: NotImplemented{}, errCode: ErrNotImplemented},
+	{err: errSignatureMismatch, errCode: ErrSignatureDoesNotMatch},
+
+	// SSE-C errors
+	{err: errInsecureSSERequest, errCode: ErrInsecureSSECustomerRequest},
+	{err: errInvalidSSEAlgorithm, errCode: ErrInvalidSSECustomerAlgorithm},
+	{err: errMissingSSEKey, errCode: ErrMissingSSECustomerKey},
+	{err: errInvalidSSEKey, errCode: ErrInvalidSSECustomerKey},
+	{err: errMissingSSEKeyMD5, errCode: ErrMissingSSECustomerKeyMD5},
+	{err: errSSEKeyMD5Mismatch, errCode: ErrSSECustomerKeyMD5Mismatch},
+	{err: errObjectTampered, errCode: ErrObjectTampered},
+
+	{err: nil, errCode: ErrNone},
+	{err: errors.New("Custom error"), errCode: ErrInternalError}, // Case where err type is unknown.
+}
+
 func TestAPIErrCode(t *testing.T) {
-	testCases := []struct {
-		err     error
-		errCode APIErrorCode
-	}{
-		// Valid cases.
-		{
-			hash.BadDigest{},
-			ErrBadDigest,
-		},
-		{
-			hash.SHA256Mismatch{},
-			ErrContentSHA256Mismatch,
-		},
-		{
-			IncompleteBody{},
-			ErrIncompleteBody,
-		},
-		{
-			ObjectExistsAsDirectory{},
-			ErrObjectExistsAsDirectory,
-		},
-		{
-			BucketNameInvalid{},
-			ErrInvalidBucketName,
-		},
-		{
-			BucketExists{},
-			ErrBucketAlreadyOwnedByYou,
-		},
-		{
-			ObjectNotFound{},
-			ErrNoSuchKey,
-		},
-		{
-			ObjectNameInvalid{},
-			ErrInvalidObjectName,
-		},
-		{
-			InvalidUploadID{},
-			ErrNoSuchUpload,
-		},
-		{
-			InvalidPart{},
-			ErrInvalidPart,
-		},
-		{
-			InsufficientReadQuorum{},
-			ErrReadQuorum,
-		},
-		{
-			InsufficientWriteQuorum{},
-			ErrWriteQuorum,
-		},
-		{
-			UnsupportedDelimiter{},
-			ErrNotImplemented,
-		},
-		{
-			InvalidMarkerPrefixCombination{},
-			ErrNotImplemented,
-		},
-		{
-			InvalidUploadIDKeyCombination{},
-			ErrNotImplemented,
-		},
-		{
-			MalformedUploadID{},
-			ErrNoSuchUpload,
-		},
-		{
-			PartTooSmall{},
-			ErrEntityTooSmall,
-		},
-		{
-			BucketNotEmpty{},
-			ErrBucketNotEmpty,
-		},
-		{
-			BucketNotFound{},
-			ErrNoSuchBucket,
-		},
-		{
-			StorageFull{},
-			ErrStorageFull,
-		},
-		{
-			NotImplemented{},
-			ErrNotImplemented,
-		},
-		{
-			errSignatureMismatch,
-			ErrSignatureDoesNotMatch,
-		}, // End of all valid cases.
-
-		// Case where err is nil.
-		{
-			nil,
-			ErrNone,
-		},
-
-		// Case where err type is unknown.
-		{
-			errors.New("Custom error"),
-			ErrInternalError,
-		},
-	}
-
-	// Validate all the errors with their API error codes.
-	for i, testCase := range testCases {
+	for i, testCase := range toAPIErrorCodeTests {
 		errCode := toAPIErrorCode(testCase.err)
 		if errCode != testCase.errCode {
 			t.Errorf("Test %d: Expected error code %d, got %d", i+1, testCase.errCode, errCode)

cmd/api-headers.go

@@ -18,6 +18,7 @@ package cmd
 
 import (
 	"bytes"
+	"encoding/json"
 	"encoding/xml"
 	"fmt"
 	"net/http"
@@ -38,7 +39,7 @@ func setCommonHeaders(w http.ResponseWriter) {
 	w.Header().Set("Server", globalServerUserAgent)
 	// Set `x-amz-bucket-region` only if region is set on the server
 	// by default minio uses an empty region.
-	if region := serverConfig.GetRegion(); region != "" {
+	if region := globalServerConfig.GetRegion(); region != "" {
 		w.Header().Set("X-Amz-Bucket-Region", region)
 	}
 	w.Header().Set("Accept-Ranges", "bytes")
@@ -53,6 +54,14 @@ func encodeResponse(response interface{}) []byte {
 	return bytesBuffer.Bytes()
 }
 
+// Encodes the response headers into JSON format.
+func encodeResponseJSON(response interface{}) []byte {
+	var bytesBuffer bytes.Buffer
+	e := json.NewEncoder(&bytesBuffer)
+	e.Encode(response)
+	return bytesBuffer.Bytes()
+}
+
 // Write object header
 func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *httpRange) {
 	// set common headers
@@ -80,6 +89,11 @@ func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *h
 
 	// Set all other user defined metadata.
 	for k, v := range objInfo.UserDefined {
+		if hasPrefix(k, ReservedMetadataPrefix) {
+			// Do not need to send any internal metadata
+			// values to client.
+			continue
+		}
 		w.Header().Set(k, v)
 	}
 

cmd/api-response.go

@@ -22,6 +22,8 @@ import (
 	"net/url"
 	"path"
 	"time"
+
+	"github.com/minio/minio/pkg/handlers"
 )
 
 const (
@@ -166,13 +168,12 @@ type ListBucketsResponse struct {
 
 // Upload container for in progress multipart upload
 type Upload struct {
-	Key            string
-	UploadID       string `xml:"UploadId"`
-	Initiator      Initiator
-	Owner          Owner
-	StorageClass   string
-	Initiated      string
-	HealUploadInfo *HealObjectInfo `xml:"HealObjectInfo,omitempty"`
+	Key          string
+	UploadID     string `xml:"UploadId"`
+	Initiator    Initiator
+	Owner        Owner
+	StorageClass string
+	Initiated    string
 }
 
 // CommonPrefix container for prefix response in ListObjectsResponse
@@ -182,9 +183,8 @@ type CommonPrefix struct {
 
 // Bucket container for bucket metadata
 type Bucket struct {
-	Name           string
-	CreationDate   string          // time string of format "2006-01-02T15:04:05.000Z"
-	HealBucketInfo *HealBucketInfo `xml:"HealBucketInfo,omitempty"`
+	Name         string
+	CreationDate string // time string of format "2006-01-02T15:04:05.000Z"
 }
 
 // Object container for object metadata
@@ -198,8 +198,7 @@ type Object struct {
 	Owner Owner
 
 	// The class of storage used to store the object.
-	StorageClass   string
-	HealObjectInfo *HealObjectInfo `xml:"HealObjectInfo,omitempty"`
+	StorageClass string
 }
 
 // CopyObjectResponse container returns ETag and LastModified of the successfully copied object
@@ -284,15 +283,21 @@ func getURLScheme(tls bool) string {
 }
 
 // getObjectLocation gets the fully qualified URL of an object.
-func getObjectLocation(host, proto, bucket, object string) string {
+func getObjectLocation(r *http.Request, domain, bucket, object string) string {
+	proto := handlers.GetSourceScheme(r)
 	if proto == "" {
 		proto = getURLScheme(globalIsSSL)
 	}
-	u := url.URL{
-		Host:   host,
+	u := &url.URL{
+		Host:   r.Host,
 		Path:   path.Join(slashSeparator, bucket, object),
 		Scheme: proto,
 	}
+	// If domain is set then we need to use bucket DNS style.
+	if domain != "" {
+		u.Host = bucket + "." + domain
+		u.Path = path.Join(slashSeparator, object)
+	}
 	return u.String()
 }
 
@@ -308,7 +313,6 @@ func generateListBucketsResponse(buckets []BucketInfo) ListBucketsResponse {
 		var listbucket = Bucket{}
 		listbucket.Name = bucket.Name
 		listbucket.CreationDate = bucket.Created.UTC().Format(timeFormatAMZLong)
-		listbucket.HealBucketInfo = bucket.HealBucketInfo
 		listbuckets = append(listbuckets, listbucket)
 	}
 
@@ -339,8 +343,6 @@ func generateListObjectsV1Response(bucket, prefix, marker, delimiter string, max
 		content.Size = object.Size
 		content.StorageClass = globalMinioDefaultStorageClass
 		content.Owner = owner
-		// object.HealObjectInfo is non-empty only when resp is constructed in ListObjectsHeal.
-		content.HealObjectInfo = object.HealObjectInfo
 		contents = append(contents, content)
 	}
 	// TODO - support EncodingType in xml decoding
@@ -498,7 +500,6 @@ func generateListMultipartUploadsResponse(bucket string, multipartsInfo ListMult
 		newUpload.UploadID = upload.UploadID
 		newUpload.Key = upload.Object
 		newUpload.Initiated = upload.Initiated.UTC().Format(timeFormatAMZLong)
-		newUpload.HealUploadInfo = upload.HealUploadInfo
 		listMultipartUploadsResponse.Uploads[index] = newUpload
 	}
 	return listMultipartUploadsResponse
@@ -567,6 +568,12 @@ func writeSuccessResponseHeadersOnly(w http.ResponseWriter) {
 
 // writeErrorRespone writes error headers
 func writeErrorResponse(w http.ResponseWriter, errorCode APIErrorCode, reqURL *url.URL) {
+	switch errorCode {
+	case ErrSlowDown, ErrServerNotInitialized, ErrReadQuorum, ErrWriteQuorum:
+		// Set retry-after header to indicate user-agents to retry request after 120secs.
+		// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After
+		w.Header().Set("Retry-After", "120")
+	}
 	apiError := getAPIError(errorCode)
 	// Generate error response.
 	errorResponse := getAPIErrorResponse(apiError, reqURL.Path)
@@ -578,3 +585,31 @@ func writeErrorResponseHeadersOnly(w http.ResponseWriter, errorCode APIErrorCode
 	apiError := getAPIError(errorCode)
 	writeResponse(w, apiError.HTTPStatusCode, nil, mimeNone)
 }
+
+// writeErrorResponseJSON - writes error response in JSON format;
+// useful for admin APIs.
+func writeErrorResponseJSON(w http.ResponseWriter, errorCode APIErrorCode, reqURL *url.URL) {
+	apiError := getAPIError(errorCode)
+	// Generate error response.
+	errorResponse := getAPIErrorResponse(apiError, reqURL.Path)
+	encodedErrorResponse := encodeResponseJSON(errorResponse)
+	writeResponse(w, apiError.HTTPStatusCode, encodedErrorResponse, mimeJSON)
+}
+
+// writeCustomErrorResponseJSON - similar to writeErrorResponseJSON,
+// but accepts the error message directly (this allows messages to be
+// dynamically generated.)
+func writeCustomErrorResponseJSON(w http.ResponseWriter, errorCode APIErrorCode,
+	errBody string, reqURL *url.URL) {
+
+	apiError := getAPIError(errorCode)
+	errorResponse := APIErrorResponse{
+		Code:      apiError.Code,
+		Message:   errBody,
+		Resource:  reqURL.Path,
+		RequestID: "3L137",
+		HostID:    "3L137",
+	}
+	encodedErrorResponse := encodeResponseJSON(errorResponse)
+	writeResponse(w, apiError.HTTPStatusCode, encodedErrorResponse, mimeJSON)
+}

cmd/api-response_test.go

@@ -17,42 +17,89 @@
 package cmd
 
 import (
+	"net/http"
 	"testing"
 )
 
 // Tests object location.
 func TestObjectLocation(t *testing.T) {
 	testCases := []struct {
-		host, proto, bucket, object string
-		expectedLocation            string
+		request          *http.Request
+		bucket, object   string
+		domain           string
+		expectedLocation string
 	}{
 		// Server binding to localhost IP with https.
 		{
-			host:             "127.0.0.1:9000",
-			proto:            httpsScheme,
+			request: &http.Request{
+				Host: "127.0.0.1:9000",
+				Header: map[string][]string{
+					"X-Forwarded-Scheme": {httpScheme},
+				},
+			},
+			bucket:           "testbucket1",
+			object:           "test/1.txt",
+			expectedLocation: "http://127.0.0.1:9000/testbucket1/test/1.txt",
+		},
+		{
+			request: &http.Request{
+				Host: "127.0.0.1:9000",
+				Header: map[string][]string{
+					"X-Forwarded-Scheme": {httpsScheme},
+				},
+			},
 			bucket:           "testbucket1",
 			object:           "test/1.txt",
 			expectedLocation: "https://127.0.0.1:9000/testbucket1/test/1.txt",
 		},
 		// Server binding to fqdn.
 		{
-			host:             "s3.mybucket.org",
-			proto:            httpScheme,
+			request: &http.Request{
+				Host: "s3.mybucket.org",
+				Header: map[string][]string{
+					"X-Forwarded-Scheme": {httpScheme},
+				},
+			},
 			bucket:           "mybucket",
 			object:           "test/1.txt",
 			expectedLocation: "http://s3.mybucket.org/mybucket/test/1.txt",
 		},
 		// Server binding to fqdn.
 		{
-			host:             "mys3.mybucket.org",
-			proto:            "",
+			request: &http.Request{
+				Host:   "mys3.mybucket.org",
+				Header: map[string][]string{},
+			},
 			bucket:           "mybucket",
 			object:           "test/1.txt",
 			expectedLocation: "http://mys3.mybucket.org/mybucket/test/1.txt",
 		},
+		// Server with virtual domain name.
+		{
+			request: &http.Request{
+				Host:   "mys3.bucket.org",
+				Header: map[string][]string{},
+			},
+			domain:           "mys3.bucket.org",
+			bucket:           "mybucket",
+			object:           "test/1.txt",
+			expectedLocation: "http://mybucket.mys3.bucket.org/test/1.txt",
+		},
+		{
+			request: &http.Request{
+				Host: "mys3.bucket.org",
+				Header: map[string][]string{
+					"X-Forwarded-Scheme": {httpsScheme},
+				},
+			},
+			domain:           "mys3.bucket.org",
+			bucket:           "mybucket",
+			object:           "test/1.txt",
+			expectedLocation: "https://mybucket.mys3.bucket.org/test/1.txt",
+		},
 	}
 	for i, testCase := range testCases {
-		gotLocation := getObjectLocation(testCase.host, testCase.proto, testCase.bucket, testCase.object)
+		gotLocation := getObjectLocation(testCase.request, testCase.domain, testCase.bucket, testCase.object)
 		if testCase.expectedLocation != gotLocation {
 			t.Errorf("Test %d: expected %s, got %s", i+1, testCase.expectedLocation, gotLocation)
 		}

cmd/api-router.go

@@ -16,9 +16,8 @@
 
 package cmd
 
-import (
-	router "github.com/gorilla/mux"
-)
+import router "github.com/gorilla/mux"
+import "net/http"
 
 // objectAPIHandler implements and provides http handlers for S3 API.
 type objectAPIHandlers struct {
@@ -34,70 +33,75 @@ func registerAPIRouter(mux *router.Router) {
 
 	// API Router
 	apiRouter := mux.NewRoute().PathPrefix("/").Subrouter()
+	var routers []*router.Router
+	if globalDomainName != "" {
+		routers = append(routers, apiRouter.Host("{bucket:.+}."+globalDomainName).Subrouter())
+	}
+	routers = append(routers, apiRouter.PathPrefix("/{bucket}").Subrouter())
 
-	// Bucket router
-	bucket := apiRouter.PathPrefix("/{bucket}").Subrouter()
+	for _, bucket := range routers {
+		// Object operations
+		// HeadObject
+		bucket.Methods("HEAD").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.HeadObjectHandler))
+		// CopyObjectPart
+		bucket.Methods("PUT").Path("/{object:.+}").HeadersRegexp("X-Amz-Copy-Source", ".*?(\\/|%2F).*?").HandlerFunc(httpTraceAll(api.CopyObjectPartHandler)).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
+		// PutObjectPart
+		bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.PutObjectPartHandler)).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
+		// ListObjectPxarts
+		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.ListObjectPartsHandler)).Queries("uploadId", "{uploadId:.*}")
+		// CompleteMultipartUpload
+		bucket.Methods("POST").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.CompleteMultipartUploadHandler)).Queries("uploadId", "{uploadId:.*}")
+		// NewMultipartUpload
+		bucket.Methods("POST").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.NewMultipartUploadHandler)).Queries("uploads", "")
+		// AbortMultipartUpload
+		bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.AbortMultipartUploadHandler)).Queries("uploadId", "{uploadId:.*}")
+		// GetObject
+		bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.GetObjectHandler))
+		// CopyObject
+		bucket.Methods("PUT").Path("/{object:.+}").HeadersRegexp("X-Amz-Copy-Source", ".*?(\\/|%2F).*?").HandlerFunc(httpTraceAll(api.CopyObjectHandler))
+		// PutObject
+		bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.PutObjectHandler))
+		// DeleteObject
+		bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.DeleteObjectHandler))
 
-	/// Object operations
-
-	// HeadObject
-	bucket.Methods("HEAD").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.HeadObjectHandler))
-	// CopyObjectPart
-	bucket.Methods("PUT").Path("/{object:.+}").HeadersRegexp("X-Amz-Copy-Source", ".*?(\\/|%2F).*?").HandlerFunc(httpTraceAll(api.CopyObjectPartHandler)).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
-	// PutObjectPart
-	bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.PutObjectPartHandler)).Queries("partNumber", "{partNumber:[0-9]+}", "uploadId", "{uploadId:.*}")
-	// ListObjectPxarts
-	bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.ListObjectPartsHandler)).Queries("uploadId", "{uploadId:.*}")
-	// CompleteMultipartUpload
-	bucket.Methods("POST").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.CompleteMultipartUploadHandler)).Queries("uploadId", "{uploadId:.*}")
-	// NewMultipartUpload
-	bucket.Methods("POST").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.NewMultipartUploadHandler)).Queries("uploads", "")
-	// AbortMultipartUpload
-	bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.AbortMultipartUploadHandler)).Queries("uploadId", "{uploadId:.*}")
-	// GetObject
-	bucket.Methods("GET").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.GetObjectHandler))
-	// CopyObject
-	bucket.Methods("PUT").Path("/{object:.+}").HeadersRegexp("X-Amz-Copy-Source", ".*?(\\/|%2F).*?").HandlerFunc(httpTraceAll(api.CopyObjectHandler))
-	// PutObject
-	bucket.Methods("PUT").Path("/{object:.+}").HandlerFunc(httpTraceHdrs(api.PutObjectHandler))
-	// DeleteObject
-	bucket.Methods("DELETE").Path("/{object:.+}").HandlerFunc(httpTraceAll(api.DeleteObjectHandler))
-
-	/// Bucket operations
-
-	// GetBucketLocation
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.GetBucketLocationHandler)).Queries("location", "")
-	// GetBucketPolicy
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.GetBucketPolicyHandler)).Queries("policy", "")
-	// GetBucketNotification
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.GetBucketNotificationHandler)).Queries("notification", "")
-	// ListenBucketNotification
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListenBucketNotificationHandler)).Queries("events", "{events:.*}")
-	// ListMultipartUploads
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListMultipartUploadsHandler)).Queries("uploads", "")
-	// ListObjectsV2
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListObjectsV2Handler)).Queries("list-type", "2")
-	// ListObjectsV1 (Legacy)
-	bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListObjectsV1Handler))
-	// PutBucketPolicy
-	bucket.Methods("PUT").HandlerFunc(httpTraceAll(api.PutBucketPolicyHandler)).Queries("policy", "")
-	// PutBucketNotification
-	bucket.Methods("PUT").HandlerFunc(httpTraceAll(api.PutBucketNotificationHandler)).Queries("notification", "")
-	// PutBucket
-	bucket.Methods("PUT").HandlerFunc(httpTraceAll(api.PutBucketHandler))
-	// HeadBucket
-	bucket.Methods("HEAD").HandlerFunc(httpTraceAll(api.HeadBucketHandler))
-	// PostPolicy
-	bucket.Methods("POST").HeadersRegexp("Content-Type", "multipart/form-data*").HandlerFunc(httpTraceAll(api.PostPolicyBucketHandler))
-	// DeleteMultipleObjects
-	bucket.Methods("POST").HandlerFunc(httpTraceAll(api.DeleteMultipleObjectsHandler))
-	// DeleteBucketPolicy
-	bucket.Methods("DELETE").HandlerFunc(httpTraceAll(api.DeleteBucketPolicyHandler)).Queries("policy", "")
-	// DeleteBucket
-	bucket.Methods("DELETE").HandlerFunc(httpTraceAll(api.DeleteBucketHandler))
+		/// Bucket operations
+		// GetBucketLocation
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.GetBucketLocationHandler)).Queries("location", "")
+		// GetBucketPolicy
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.GetBucketPolicyHandler)).Queries("policy", "")
+		// GetBucketNotification
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.GetBucketNotificationHandler)).Queries("notification", "")
+		// ListenBucketNotification
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListenBucketNotificationHandler)).Queries("events", "{events:.*}")
+		// ListMultipartUploads
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListMultipartUploadsHandler)).Queries("uploads", "")
+		// ListObjectsV2
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListObjectsV2Handler)).Queries("list-type", "2")
+		// ListObjectsV1 (Legacy)
+		bucket.Methods("GET").HandlerFunc(httpTraceAll(api.ListObjectsV1Handler))
+		// PutBucketPolicy
+		bucket.Methods("PUT").HandlerFunc(httpTraceAll(api.PutBucketPolicyHandler)).Queries("policy", "")
+		// PutBucketNotification
+		bucket.Methods("PUT").HandlerFunc(httpTraceAll(api.PutBucketNotificationHandler)).Queries("notification", "")
+		// PutBucket
+		bucket.Methods("PUT").HandlerFunc(httpTraceAll(api.PutBucketHandler))
+		// HeadBucket
+		bucket.Methods("HEAD").HandlerFunc(httpTraceAll(api.HeadBucketHandler))
+		// PostPolicy
+		bucket.Methods("POST").HeadersRegexp("Content-Type", "multipart/form-data*").HandlerFunc(httpTraceAll(api.PostPolicyBucketHandler))
+		// DeleteMultipleObjects
+		bucket.Methods("POST").HandlerFunc(httpTraceAll(api.DeleteMultipleObjectsHandler)).Queries("delete", "")
+		// DeleteBucketPolicy
+		bucket.Methods("DELETE").HandlerFunc(httpTraceAll(api.DeleteBucketPolicyHandler)).Queries("policy", "")
+		// DeleteBucket
+		bucket.Methods("DELETE").HandlerFunc(httpTraceAll(api.DeleteBucketHandler))
+	}
 
 	/// Root operation
 
 	// ListBuckets
-	apiRouter.Methods("GET").HandlerFunc(httpTraceAll(api.ListBucketsHandler))
+	apiRouter.Methods("GET").Path("/").HandlerFunc(httpTraceAll(api.ListBucketsHandler))
+
+	// If none of the routes match.
+	apiRouter.NotFoundHandler = http.HandlerFunc(httpTraceAll(notFoundHandler))
 }

cmd/auth-handler.go

@@ -18,15 +18,13 @@ package cmd
 
 import (
 	"bytes"
+	"errors"
 	"io/ioutil"
 	"net/http"
 	"strings"
-)
 
-// Verify if the request http Header "x-amz-content-sha256" == "UNSIGNED-PAYLOAD"
-func isRequestUnsignedPayload(r *http.Request) bool {
-	return r.Header.Get("x-amz-content-sha256") == unsignedPayload
-}
+	"github.com/minio/minio/pkg/handlers"
+)
 
 // Verify if request has JWT.
 func isRequestJWT(r *http.Request) bool {
@@ -58,13 +56,14 @@ func isRequestPresignedSignatureV2(r *http.Request) bool {
 
 // Verify if request has AWS Post policy Signature Version '4'.
 func isRequestPostPolicySignatureV4(r *http.Request) bool {
-	return strings.Contains(r.Header.Get("Content-Type"), "multipart/form-data") && r.Method == httpPOST
+	return strings.Contains(r.Header.Get("Content-Type"), "multipart/form-data") &&
+		r.Method == http.MethodPost
 }
 
 // Verify if the request has AWS Streaming Signature Version '4'. This is only valid for 'PUT' operation.
 func isRequestSignStreamingV4(r *http.Request) bool {
 	return r.Header.Get("x-amz-content-sha256") == streamingContentSHA256 &&
-		r.Method == httpPUT
+		r.Method == http.MethodPut
 }
 
 // Authorization type.
@@ -105,30 +104,38 @@ func getRequestAuthType(r *http.Request) authType {
 	return authTypeUnknown
 }
 
+// checkAdminRequestAuthType checks whether the request is a valid signature V2 or V4 request.
+// It does not accept presigned or JWT or anonymous requests.
+func checkAdminRequestAuthType(r *http.Request, region string) APIErrorCode {
+	s3Err := ErrAccessDenied
+	if getRequestAuthType(r) == authTypeSigned { // we only support V4 (no presign)
+		s3Err = isReqAuthenticated(r, region)
+	}
+	if s3Err != ErrNone {
+		errorIf(errors.New(getAPIError(s3Err).Description), "%s", dumpRequest(r))
+	}
+	return s3Err
+}
+
 func checkRequestAuthType(r *http.Request, bucket, policyAction, region string) APIErrorCode {
 	reqAuthType := getRequestAuthType(r)
 
 	switch reqAuthType {
 	case authTypePresignedV2, authTypeSignedV2:
 		// Signature V2 validation.
-		s3Error := isReqAuthenticatedV2(r)
-		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
-		}
-		return s3Error
+		return isReqAuthenticatedV2(r)
 	case authTypeSigned, authTypePresigned:
-		s3Error := isReqAuthenticated(r, region)
-		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
-		}
-		return s3Error
+		return isReqAuthenticated(r, region)
 	}
 
 	if reqAuthType == authTypeAnonymous && policyAction != "" {
 		// http://docs.aws.amazon.com/AmazonS3/latest/dev/using-with-s3-actions.html
-		sourceIP := getSourceIPAddress(r)
-		return enforceBucketPolicy(bucket, policyAction, r.URL.Path,
-			r.Referer(), sourceIP, r.URL.Query())
+		resource, err := getResource(r.URL.Path, r.Host, globalDomainName)
+		if err != nil {
+			return ErrInternalError
+		}
+		return enforceBucketPolicy(bucket, policyAction, resource,
+			r.Referer(), handlers.GetSourceIP(r), r.URL.Query())
 	}
 
 	// By default return ErrAccessDenied

cmd/auth-handler_test.go

@@ -23,6 +23,9 @@ import (
 	"net/url"
 	"os"
 	"testing"
+	"time"
+
+	"github.com/minio/minio/pkg/auth"
 )
 
 // Test get request auth type.
@@ -188,40 +191,6 @@ func TestS3SupportedAuthType(t *testing.T) {
 	}
 }
 
-// TestIsRequestUnsignedPayload - Test validates the Unsigned payload detection logic.
-func TestIsRequestUnsignedPayload(t *testing.T) {
-	testCases := []struct {
-		inputAmzContentHeader string
-		expectedResult        bool
-	}{
-		// Test case - 1.
-		// Test case with "X-Amz-Content-Sha256" header set to empty value.
-		{"", false},
-		// Test case - 2.
-		// Test case with "X-Amz-Content-Sha256" header set to  "UNSIGNED-PAYLOAD"
-		// The payload is flagged as unsigned When "X-Amz-Content-Sha256" header is set to  "UNSIGNED-PAYLOAD".
-		{unsignedPayload, true},
-		// Test case - 3.
-		// set to a random value.
-		{"abcd", false},
-	}
-
-	// creating an input HTTP request.
-	// Only the headers are relevant for this particular test.
-	inputReq, err := http.NewRequest("GET", "http://example.com", nil)
-	if err != nil {
-		t.Fatalf("Error initializing input HTTP request: %v", err)
-	}
-
-	for i, testCase := range testCases {
-		inputReq.Header.Set("X-Amz-Content-Sha256", testCase.inputAmzContentHeader)
-		actualResult := isRequestUnsignedPayload(inputReq)
-		if testCase.expectedResult != actualResult {
-			t.Errorf("Test %d: Expected the result to `%v`, but instead got `%v`", i+1, testCase.expectedResult, actualResult)
-		}
-	}
-}
-
 func TestIsRequestPresignedSignatureV2(t *testing.T) {
 	testCases := []struct {
 		inputQueryKey   string
@@ -302,17 +271,50 @@ func mustNewRequest(method string, urlStr string, contentLength int64, body io.R
 // is signed with AWS Signature V4, fails if not able to do so.
 func mustNewSignedRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
 	req := mustNewRequest(method, urlStr, contentLength, body, t)
-	cred := serverConfig.GetCredential()
+	cred := globalServerConfig.GetCredential()
 	if err := signRequestV4(req, cred.AccessKey, cred.SecretKey); err != nil {
 		t.Fatalf("Unable to inititalized new signed http request %s", err)
 	}
 	return req
 }
 
+// This is similar to mustNewRequest but additionally the request
+// is signed with AWS Signature V2, fails if not able to do so.
+func mustNewSignedV2Request(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
+	req := mustNewRequest(method, urlStr, contentLength, body, t)
+	cred := globalServerConfig.GetCredential()
+	if err := signRequestV2(req, cred.AccessKey, cred.SecretKey); err != nil {
+		t.Fatalf("Unable to inititalized new signed http request %s", err)
+	}
+	return req
+}
+
+// This is similar to mustNewRequest but additionally the request
+// is presigned with AWS Signature V2, fails if not able to do so.
+func mustNewPresignedV2Request(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
+	req := mustNewRequest(method, urlStr, contentLength, body, t)
+	cred := globalServerConfig.GetCredential()
+	if err := preSignV2(req, cred.AccessKey, cred.SecretKey, time.Now().Add(10*time.Minute).Unix()); err != nil {
+		t.Fatalf("Unable to inititalized new signed http request %s", err)
+	}
+	return req
+}
+
+// This is similar to mustNewRequest but additionally the request
+// is presigned with AWS Signature V4, fails if not able to do so.
+func mustNewPresignedRequest(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
+	req := mustNewRequest(method, urlStr, contentLength, body, t)
+	cred := globalServerConfig.GetCredential()
+	if err := preSignV4(req, cred.AccessKey, cred.SecretKey, time.Now().Add(10*time.Minute).Unix()); err != nil {
+		t.Fatalf("Unable to inititalized new signed http request %s", err)
+	}
+	return req
+}
+
 func mustNewSignedBadMD5Request(method string, urlStr string, contentLength int64, body io.ReadSeeker, t *testing.T) *http.Request {
 	req := mustNewRequest(method, urlStr, contentLength, body, t)
 	req.Header.Set("Content-Md5", "YWFhYWFhYWFhYWFhYWFhCg==")
-	cred := serverConfig.GetCredential()
+	cred := globalServerConfig.GetCredential()
 	if err := signRequestV4(req, cred.AccessKey, cred.SecretKey); err != nil {
 		t.Fatalf("Unable to initialized new signed http request %s", err)
 	}
@@ -327,12 +329,12 @@ func TestIsReqAuthenticated(t *testing.T) {
 	}
 	defer os.RemoveAll(path)
 
-	creds, err := createCredential("myuser", "mypassword")
+	creds, err := auth.CreateCredentials("myuser", "mypassword")
 	if err != nil {
 		t.Fatalf("unable create credential, %s", err)
 	}
 
-	serverConfig.SetCredential(creds)
+	globalServerConfig.SetCredential(creds)
 
 	// List of test cases for validating http request authentication.
 	testCases := []struct {
@@ -351,8 +353,37 @@ func TestIsReqAuthenticated(t *testing.T) {
 
 	// Validates all testcases.
 	for _, testCase := range testCases {
-		if s3Error := isReqAuthenticated(testCase.req, serverConfig.GetRegion()); s3Error != testCase.s3Error {
+		if s3Error := isReqAuthenticated(testCase.req, globalServerConfig.GetRegion()); s3Error != testCase.s3Error {
 			t.Fatalf("Unexpected s3error returned wanted %d, got %d", testCase.s3Error, s3Error)
 		}
 	}
 }
+func TestCheckAdminRequestAuthType(t *testing.T) {
+	path, err := newTestConfig(globalMinioDefaultRegion)
+	if err != nil {
+		t.Fatalf("unable initialize config file, %s", err)
+	}
+	defer os.RemoveAll(path)
+
+	creds, err := auth.CreateCredentials("myuser", "mypassword")
+	if err != nil {
+		t.Fatalf("unable create credential, %s", err)
+	}
+
+	globalServerConfig.SetCredential(creds)
+	testCases := []struct {
+		Request *http.Request
+		ErrCode APIErrorCode
+	}{
+		{Request: mustNewRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrAccessDenied},
+		{Request: mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrNone},
+		{Request: mustNewSignedV2Request("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrAccessDenied},
+		{Request: mustNewPresignedV2Request("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrAccessDenied},
+		{Request: mustNewPresignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrCode: ErrAccessDenied},
+	}
+	for i, testCase := range testCases {
+		if s3Error := checkAdminRequestAuthType(testCase.Request, globalServerConfig.GetRegion()); s3Error != testCase.ErrCode {
+			t.Errorf("Test %d: Unexpected s3error returned wanted %d, got %d", i, testCase.ErrCode, s3Error)
+		}
+	}
+}

cmd/auth-rpc-client.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016, 2017 Minio, Inc.
+ * Minio Cloud Storage, (C) 2016, 2017, 2018 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,16 @@
 package cmd
 
 import (
+	"bufio"
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
 	"net/rpc"
+	"strings"
 	"sync"
 	"time"
 )
@@ -52,10 +61,11 @@ type authConfig struct {
 
 // AuthRPCClient is a authenticated RPC client which does authentication before doing Call().
 type AuthRPCClient struct {
-	sync.RWMutex            // Mutex to lock this object.
-	rpcClient    *RPCClient // Reconnectable RPC client to make any RPC call.
-	config       authConfig // Authentication configuration information.
-	authToken    string     // Authentication token.
+	sync.RWMutex             // Mutex to lock this object.
+	rpcClient    *rpc.Client // RPC client to make any RPC call.
+	config       authConfig  // Authentication configuration information.
+	authToken    string      // Authentication token.
+	version      semVersion  // RPC version.
 }
 
 // newAuthRPCClient - returns a JWT based authenticated (go) rpc client, which does automatic reconnect.
@@ -73,8 +83,8 @@ func newAuthRPCClient(config authConfig) *AuthRPCClient {
 	}
 
 	return &AuthRPCClient{
-		rpcClient: newRPCClient(config.serverAddr, config.serviceEndpoint, config.secureConn),
-		config:    config,
+		config:  config,
+		version: globalRPCAPIVersion,
 	}
 }
 
@@ -99,38 +109,60 @@ func (authClient *AuthRPCClient) Login() (err error) {
 
 	// Attempt to login if not logged in already.
 	if authClient.authToken == "" {
-		authClient.authToken, err = authenticateNode(authClient.config.accessKey, authClient.config.secretKey)
+		var authToken string
+		authToken, err = authenticateNode(authClient.config.accessKey, authClient.config.secretKey)
 		if err != nil {
 			return err
 		}
+
 		// Login to authenticate your token.
 		var (
 			loginMethod = authClient.config.serviceName + loginMethodName
 			loginArgs   = LoginRPCArgs{
-				AuthToken:   authClient.authToken,
-				Version:     Version,
+				AuthToken:   authToken,
+				Version:     globalRPCAPIVersion,
 				RequestTime: UTCNow(),
 			}
 		)
-		if err = authClient.rpcClient.Call(loginMethod, &loginArgs, &LoginRPCReply{}); err != nil {
+
+		// Re-dial after we have disconnected or if its a fresh run.
+		var rpcClient *rpc.Client
+		rpcClient, err = rpcDial(authClient.config.serverAddr, authClient.config.serviceEndpoint, authClient.config.secureConn)
+		if err != nil {
 			return err
 		}
+
+		if err = rpcClient.Call(loginMethod, &loginArgs, &LoginRPCReply{}); err != nil {
+			// gob doesn't provide any typed errors for us to reflect
+			// upon, this is the only way to return proper error.
+			if strings.Contains(err.Error(), "gob: wrong type") {
+				return errRPCAPIVersionUnsupported
+			}
+			return err
+		}
+
+		// Initialize rpc client and auth token after a successful login.
+		authClient.authToken = authToken
+		authClient.rpcClient = rpcClient
 	}
+
 	return nil
 }
 
 // call makes a RPC call after logs into the server.
 func (authClient *AuthRPCClient) call(serviceMethod string, args interface {
 	SetAuthToken(authToken string)
+	SetRPCAPIVersion(version semVersion)
 }, reply interface{}) (err error) {
 	if err = authClient.Login(); err != nil {
 		return err
 	} // On successful login, execute RPC call.
 
-	authClient.RLock()
 	// Set token before the rpc call.
+	authClient.RLock()
+	defer authClient.RUnlock()
 	args.SetAuthToken(authClient.authToken)
-	authClient.RUnlock()
+	args.SetRPCAPIVersion(authClient.version)
 
 	// Do an RPC call.
 	return authClient.rpcClient.Call(serviceMethod, args, reply)
@@ -139,6 +171,7 @@ func (authClient *AuthRPCClient) call(serviceMethod string, args interface {
 // Call executes RPC call till success or globalAuthRPCRetryThreshold on ErrShutdown.
 func (authClient *AuthRPCClient) Call(serviceMethod string, args interface {
 	SetAuthToken(authToken string)
+	SetRPCAPIVersion(version semVersion)
 }, reply interface{}) (err error) {
 
 	// Done channel is used to close any lingering retry routine, as soon
@@ -159,6 +192,11 @@ func (authClient *AuthRPCClient) Call(serviceMethod string, args interface {
 				}
 			}
 		}
+		// gob doesn't provide any typed errors for us to reflect
+		// upon, this is the only way to return proper error.
+		if err != nil && strings.Contains(err.Error(), "gob: wrong type") {
+			err = errRPCAPIVersionUnsupported
+		}
 		break
 	}
 	return err
@@ -169,6 +207,10 @@ func (authClient *AuthRPCClient) Close() error {
 	authClient.Lock()
 	defer authClient.Unlock()
 
+	if authClient.rpcClient == nil {
+		return nil
+	}
+
 	authClient.authToken = ""
 	return authClient.rpcClient.Close()
 }
@@ -182,3 +224,87 @@ func (authClient *AuthRPCClient) ServerAddr() string {
 func (authClient *AuthRPCClient) ServiceEndpoint() string {
 	return authClient.config.serviceEndpoint
 }
+
+// default Dial timeout for RPC connections.
+const defaultDialTimeout = 3 * time.Second
+
+// Connect success message required from rpc server.
+const connectSuccessMessage = "200 Connected to Go RPC"
+
+// dial tries to establish a connection to serverAddr in a safe manner.
+// If there is a valid rpc.Cliemt, it returns that else creates a new one.
+func rpcDial(serverAddr, serviceEndpoint string, secureConn bool) (netRPCClient *rpc.Client, err error) {
+	if serverAddr == "" || serviceEndpoint == "" {
+		return nil, errInvalidArgument
+	}
+	d := &net.Dialer{
+		Timeout: defaultDialTimeout,
+	}
+	var conn net.Conn
+	if secureConn {
+		var hostname string
+		if hostname, _, err = net.SplitHostPort(serverAddr); err != nil {
+			return nil, &net.OpError{
+				Op:   "dial-http",
+				Net:  serverAddr + serviceEndpoint,
+				Addr: nil,
+				Err:  fmt.Errorf("Unable to parse server address <%s>: %s", serverAddr, err),
+			}
+		}
+		// ServerName in tls.Config needs to be specified to support SNI certificates.
+		conn, err = tls.DialWithDialer(d, "tcp", serverAddr, &tls.Config{
+			ServerName: hostname,
+			RootCAs:    globalRootCAs,
+		})
+	} else {
+		conn, err = d.Dial("tcp", serverAddr)
+	}
+
+	if err != nil {
+		// Print RPC connection errors that are worthy to display in log.
+		switch err.(type) {
+		case x509.HostnameError:
+			errorIf(err, "Unable to establish secure connection to %s", serverAddr)
+		}
+
+		return nil, &net.OpError{
+			Op:   "dial-http",
+			Net:  serverAddr + serviceEndpoint,
+			Addr: nil,
+			Err:  err,
+		}
+	}
+
+	// Check for network errors writing over the dialed conn.
+	if _, err = io.WriteString(conn, "CONNECT "+serviceEndpoint+" HTTP/1.0\n\n"); err != nil {
+		conn.Close()
+		return nil, &net.OpError{
+			Op:   "dial-http",
+			Net:  serverAddr + serviceEndpoint,
+			Addr: nil,
+			Err:  err,
+		}
+	}
+
+	// Attempt to read the HTTP response for the HTTP method CONNECT, upon
+	// success return the RPC connection instance.
+	resp, err := http.ReadResponse(bufio.NewReader(conn), &http.Request{
+		Method: http.MethodConnect,
+	})
+	if err != nil {
+		conn.Close()
+		return nil, &net.OpError{
+			Op:   "dial-http",
+			Net:  serverAddr + serviceEndpoint,
+			Addr: nil,
+			Err:  err,
+		}
+	}
+	if resp.Status != connectSuccessMessage {
+		conn.Close()
+		return nil, errors.New("unexpected HTTP response: " + resp.Status)
+	}
+
+	// Initialize rpc client.
+	return rpc.NewClient(conn), nil
+}

cmd/auth-rpc-client_test.go

@@ -16,7 +16,12 @@
 
 package cmd
 
-import "testing"
+import (
+	"crypto/x509"
+	"os"
+	"path"
+	"testing"
+)
 
 // Tests authorized RPC client.
 func TestAuthRPCClient(t *testing.T) {
@@ -53,3 +58,81 @@ func TestAuthRPCClient(t *testing.T) {
 		t.Fatalf("Unexpected node value %s, but expected %s", authRPC.ServiceEndpoint(), authCfg.serviceEndpoint)
 	}
 }
+
+// Test rpc dial test.
+func TestRPCDial(t *testing.T) {
+	prevRootCAs := globalRootCAs
+	defer func() {
+		globalRootCAs = prevRootCAs
+	}()
+
+	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(rootPath)
+
+	testServer := StartTestServer(t, "")
+	defer testServer.Stop()
+
+	cert, key, err := generateTLSCertKey("127.0.0.1")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Set global root CAs.
+	globalRootCAs = x509.NewCertPool()
+	globalRootCAs.AppendCertsFromPEM(cert)
+
+	testServerTLS := StartTestTLSServer(t, "", cert, key)
+	defer testServerTLS.Stop()
+
+	adminEndpoint := path.Join(minioReservedBucketPath, adminPath)
+	testCases := []struct {
+		serverAddr     string
+		serverEndpoint string
+		success        bool
+		secure         bool
+	}{
+		// Empty server addr should fail.
+		{
+			serverAddr:     "",
+			serverEndpoint: adminEndpoint,
+			success:        false,
+		},
+		// Unexpected server addr should fail.
+		{
+			serverAddr:     "example.com",
+			serverEndpoint: adminEndpoint,
+			success:        false,
+		},
+		// Server addr connects but fails for CONNECT call.
+		{
+			serverAddr:     "example.com:80",
+			serverEndpoint: "/",
+			success:        false,
+		},
+		// Successful connecting to insecure RPC server.
+		{
+			serverAddr:     testServer.Server.Listener.Addr().String(),
+			serverEndpoint: adminEndpoint,
+			success:        true,
+		},
+		// Successful connecting to secure RPC server.
+		{
+			serverAddr:     testServerTLS.Server.Listener.Addr().String(),
+			serverEndpoint: adminEndpoint,
+			success:        true,
+			secure:         true,
+		},
+	}
+	for i, testCase := range testCases {
+		_, err = rpcDial(testCase.serverAddr, testCase.serverEndpoint, testCase.secure)
+		if err != nil && testCase.success {
+			t.Errorf("Test %d: Expected success but found failure instead %s", i+1, err)
+		}
+		if err == nil && !testCase.success {
+			t.Errorf("Test %d: Expected failure but found success instead", i+1)
+		}
+	}
+}

cmd/auth-rpc-server_test.go

@@ -28,7 +28,7 @@ func TestLogin(t *testing.T) {
 		t.Fatalf("Failed to create test config - %v", err)
 	}
 	defer os.RemoveAll(rootPath)
-	creds := serverConfig.GetCredential()
+	creds := globalServerConfig.GetCredential()
 	token, err := authenticateNode(creds.AccessKey, creds.SecretKey)
 	if err != nil {
 		t.Fatal(err)
@@ -43,7 +43,7 @@ func TestLogin(t *testing.T) {
 		{
 			args: LoginRPCArgs{
 				AuthToken: token,
-				Version:   Version,
+				Version:   globalRPCAPIVersion,
 			},
 			skewTime:    0,
 			expectedErr: nil,
@@ -52,16 +52,16 @@ func TestLogin(t *testing.T) {
 		{
 			args: LoginRPCArgs{
 				AuthToken: token,
-				Version:   "INVALID-" + Version,
+				Version:   semVersion{3, 0, 0},
 			},
 			skewTime:    0,
-			expectedErr: errServerVersionMismatch,
+			expectedErr: errRPCAPIVersionUnsupported,
 		},
 		// Valid username, password and version, not request time
 		{
 			args: LoginRPCArgs{
 				AuthToken: token,
-				Version:   Version,
+				Version:   globalRPCAPIVersion,
 			},
 			skewTime:    20 * time.Minute,
 			expectedErr: errServerTimeMismatch,
@@ -70,7 +70,7 @@ func TestLogin(t *testing.T) {
 		{
 			args: LoginRPCArgs{
 				AuthToken: "",
-				Version:   Version,
+				Version:   globalRPCAPIVersion,
 			},
 			skewTime:    0,
 			expectedErr: errAuthentication,

cmd/benchmark-utils_test.go

@@ -239,7 +239,7 @@ func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
 		var buffer = new(bytes.Buffer)
-		err = obj.GetObject(bucket, "object"+strconv.Itoa(i%10), 0, int64(objSize), buffer)
+		err = obj.GetObject(bucket, "object"+strconv.Itoa(i%10), 0, int64(objSize), buffer, "")
 		if err != nil {
 			b.Error(err)
 		}
@@ -402,7 +402,7 @@ func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 	b.RunParallel(func(pb *testing.PB) {
 		i := 0
 		for pb.Next() {
-			err = obj.GetObject(bucket, "object"+strconv.Itoa(i), 0, int64(objSize), ioutil.Discard)
+			err = obj.GetObject(bucket, "object"+strconv.Itoa(i), 0, int64(objSize), ioutil.Discard, "")
 			if err != nil {
 				b.Error(err)
 			}

cmd/browser-peer-rpc.go

@@ -21,6 +21,8 @@ import (
 	"path"
 	"sync"
 	"time"
+
+	"github.com/minio/minio/pkg/auth"
 )
 
 // SetAuthPeerArgs - Arguments collection for SetAuth RPC call
@@ -29,7 +31,7 @@ type SetAuthPeerArgs struct {
 	AuthRPCArgs
 
 	// New credentials that receiving peer should update to.
-	Creds credential
+	Creds auth.Credentials
 }
 
 // SetAuthPeer - Update to new credentials sent from a peer Minio
@@ -48,13 +50,17 @@ func (br *browserPeerAPIHandlers) SetAuthPeer(args SetAuthPeerArgs, reply *AuthR
 		return fmt.Errorf("Invalid credential passed")
 	}
 
+	// Acquire lock before updating global configuration.
+	globalServerConfigMu.Lock()
+	defer globalServerConfigMu.Unlock()
+
 	// Update credentials in memory
-	prevCred := serverConfig.SetCredential(args.Creds)
+	prevCred := globalServerConfig.SetCredential(args.Creds)
 
 	// Save credentials to config file
-	if err := serverConfig.Save(); err != nil {
+	if err := globalServerConfig.Save(); err != nil {
 		// Save the current creds when failed to update.
-		serverConfig.SetCredential(prevCred)
+		globalServerConfig.SetCredential(prevCred)
 
 		errorIf(err, "Unable to update the config with new credentials sent from browser RPC.")
 		return err
@@ -64,7 +70,7 @@ func (br *browserPeerAPIHandlers) SetAuthPeer(args SetAuthPeerArgs, reply *AuthR
 }
 
 // Sends SetAuthPeer RPCs to all peers in the Minio cluster
-func updateCredsOnPeers(creds credential) map[string]error {
+func updateCredsOnPeers(creds auth.Credentials) map[string]error {
 	// Get list of peer addresses (from globalS3Peers)
 	peers := []string{}
 	for _, p := range globalS3Peers {
@@ -75,7 +81,7 @@ func updateCredsOnPeers(creds credential) map[string]error {
 	errs := make([]error, len(peers))
 	var wg sync.WaitGroup
 
-	serverCred := serverConfig.GetCredential()
+	serverCred := globalServerConfig.GetCredential()
 	// Launch go routines to send request to each peer in parallel.
 	for ix := range peers {
 		wg.Add(1)

cmd/browser-peer-rpc_test.go

@@ -19,6 +19,8 @@ package cmd
 import (
 	"path"
 	"testing"
+
+	"github.com/minio/minio/pkg/auth"
 )
 
 // API suite container common to both FS and XL.
@@ -61,18 +63,20 @@ func TestBrowserPeerRPC(t *testing.T) {
 // Tests for browser peer rpc.
 func (s *TestRPCBrowserPeerSuite) testBrowserPeerRPC(t *testing.T) {
 	// Construct RPC call arguments.
-	creds, err := createCredential("abcd1", "abcd1234")
+	creds, err := auth.CreateCredentials("abcd1", "abcd1234")
 	if err != nil {
 		t.Fatalf("unable to create credential. %v", err)
 	}
 
 	// Validate for invalid token.
 	args := SetAuthPeerArgs{Creds: creds}
-	args.AuthToken = "garbage"
-	rclient := newRPCClient(s.testAuthConf.serverAddr, s.testAuthConf.serviceEndpoint, false)
+	rclient := newAuthRPCClient(s.testAuthConf)
 	defer rclient.Close()
-	err = rclient.Call("BrowserPeer.SetAuthPeer", &args, &AuthRPCReply{})
-	if err != nil {
+	if err = rclient.Login(); err != nil {
+		t.Fatal(err)
+	}
+	rclient.authToken = "garbage"
+	if err = rclient.Call("BrowserPeer.SetAuthPeer", &args, &AuthRPCReply{}); err != nil {
 		if err.Error() != errInvalidToken.Error() {
 			t.Fatal(err)
 		}
@@ -88,20 +92,14 @@ func (s *TestRPCBrowserPeerSuite) testBrowserPeerRPC(t *testing.T) {
 	}
 
 	// Validate for failure in login handler with previous credentials.
-	rclient = newRPCClient(s.testAuthConf.serverAddr, s.testAuthConf.serviceEndpoint, false)
+	rclient = newAuthRPCClient(s.testAuthConf)
 	defer rclient.Close()
 	token, err := authenticateNode(creds.AccessKey, creds.SecretKey)
 	if err != nil {
 		t.Fatal(err)
 	}
-	rargs := &LoginRPCArgs{
-		AuthToken:   token,
-		Version:     Version,
-		RequestTime: UTCNow(),
-	}
-	rreply := &LoginRPCReply{}
-	err = rclient.Call("BrowserPeer"+loginMethodName, rargs, rreply)
-	if err != nil {
+	rclient.authToken = token
+	if err = rclient.Login(); err != nil {
 		if err.Error() != errInvalidAccessKeyID.Error() {
 			t.Fatal(err)
 		}
@@ -111,14 +109,8 @@ func (s *TestRPCBrowserPeerSuite) testBrowserPeerRPC(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	// Validate for success in loing handled with valid credetnails.
-	rargs = &LoginRPCArgs{
-		AuthToken:   token,
-		Version:     Version,
-		RequestTime: UTCNow(),
-	}
-	rreply = &LoginRPCReply{}
-	if err = rclient.Call("BrowserPeer"+loginMethodName, rargs, rreply); err != nil {
+	rclient.authToken = token
+	if err = rclient.Login(); err != nil {
 		t.Fatal(err)
 	}
 }

cmd/browser-rpc-router.go

@@ -18,6 +18,8 @@ package cmd
 
 import (
 	router "github.com/gorilla/mux"
+
+	"github.com/minio/minio/pkg/errors"
 )
 
 // Set up an RPC endpoint that receives browser related calls. The
@@ -40,7 +42,7 @@ func registerBrowserPeerRPCRouter(mux *router.Router) error {
 	bpRPCServer := newRPCServer()
 	err := bpRPCServer.RegisterName("BrowserPeer", bpHandlers)
 	if err != nil {
-		return traceError(err)
+		return errors.Trace(err)
 	}
 
 	bpRouter := mux.NewRoute().PathPrefix(minioReservedBucketPath).Subrouter()

cmd/bucket-handlers-listobjects.go

@@ -40,37 +40,10 @@ func validateListObjectsArgs(prefix, marker, delimiter string, maxKeys int) APIE
 	if delimiter != "" && delimiter != "/" {
 		return ErrNotImplemented
 	}
-	// Marker is set validate pre-condition.
-	if marker != "" {
-		// Marker not common with prefix is not implemented.
-		if !hasPrefix(marker, prefix) {
-			return ErrNotImplemented
-		}
-	}
 	// Success.
 	return ErrNone
 }
 
-// Validate all the ListObjectsV2 query arguments, returns an APIErrorCode
-// if one of the args do not meet the required conditions.
-// Special conditions required by Minio server are as below
-// - delimiter if set should be equal to '/', otherwise the request is rejected.
-func validateGatewayListObjectsV2Args(prefix, marker, delimiter string, maxKeys int) APIErrorCode {
-	// Max keys cannot be negative.
-	if maxKeys < 0 {
-		return ErrInvalidMaxKeys
-	}
-
-	/// Minio special conditions for ListObjects.
-
-	// Verify if delimiter is anything other than '/', which we do not support.
-	if delimiter != "" && delimiter != "/" {
-		return ErrNotImplemented
-	}
-
-	return ErrNone
-}
-
 // ListObjectsV2Handler - GET Bucket (List Objects) Version 2.
 // --------------------------
 // This implementation of the GET operation returns some or all (up to 1000)
@@ -89,7 +62,7 @@ func (api objectAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -104,23 +77,35 @@ func (api objectAPIHandlers) ListObjectsV2Handler(w http.ResponseWriter, r *http
 		// Then we need to use 'start-after' as marker instead.
 		marker = startAfter
 	}
+
 	// Validate the query params before beginning to serve the request.
 	// fetch-owner is not validated since it is a boolean
 	if s3Error := validateListObjectsArgs(prefix, marker, delimiter, maxKeys); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
+
 	// Inititate a list objects operation based on the input params.
 	// On success would return back ListObjectsInfo object to be
 	// marshalled into S3 compatible XML header.
-	listObjectsInfo, err := objectAPI.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
+	listObjectsV2Info, err := objectAPI.ListObjectsV2(bucket, prefix, marker, delimiter, maxKeys, fetchOwner, startAfter)
 	if err != nil {
-		errorIf(err, "Unable to list objects.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
-	response := generateListObjectsV2Response(bucket, prefix, token, listObjectsInfo.NextMarker, startAfter, delimiter, fetchOwner, listObjectsInfo.IsTruncated, maxKeys, listObjectsInfo.Objects, listObjectsInfo.Prefixes)
+	for i := range listObjectsV2Info.Objects {
+		if listObjectsV2Info.Objects[i].IsEncrypted() {
+			listObjectsV2Info.Objects[i].Size, err = listObjectsV2Info.Objects[i].DecryptedSize()
+			if err != nil {
+				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				return
+			}
+		}
+	}
+
+	response := generateListObjectsV2Response(bucket, prefix, token, listObjectsV2Info.NextContinuationToken, startAfter,
+		delimiter, fetchOwner, listObjectsV2Info.IsTruncated, maxKeys, listObjectsV2Info.Objects, listObjectsV2Info.Prefixes)
 
 	// Write success response.
 	writeSuccessResponseXML(w, encodeResponse(response))
@@ -142,7 +127,7 @@ func (api objectAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *http
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -150,7 +135,12 @@ func (api objectAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *http
 	// Extract all the litsObjectsV1 query params to their native values.
 	prefix, marker, delimiter, maxKeys, _ := getListObjectsV1Args(r.URL.Query())
 
-	// Validate all the query params before beginning to serve the request.
+	// Validate the maxKeys lowerbound. When maxKeys > 1000, S3 returns 1000 but
+	// does not throw an error.
+	if maxKeys < 0 {
+		writeErrorResponse(w, ErrInvalidMaxKeys, r.URL)
+		return
+	} // Validate all the query params before beginning to serve the request.
 	if s3Error := validateListObjectsArgs(prefix, marker, delimiter, maxKeys); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
@@ -161,10 +151,20 @@ func (api objectAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *http
 	// marshalled into S3 compatible XML header.
 	listObjectsInfo, err := objectAPI.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
 	if err != nil {
-		errorIf(err, "Unable to list objects.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
+
+	for i := range listObjectsInfo.Objects {
+		if listObjectsInfo.Objects[i].IsEncrypted() {
+			listObjectsInfo.Objects[i].Size, err = listObjectsInfo.Objects[i].DecryptedSize()
+			if err != nil {
+				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				return
+			}
+		}
+	}
+
 	response := generateListObjectsV1Response(bucket, prefix, marker, delimiter, maxKeys, listObjectsInfo)
 
 	// Write success response.

cmd/bucket-handlers.go

@@ -24,11 +24,15 @@ import (
 	"net/http"
 	"net/url"
 	"path"
+	"path/filepath"
+	"reflect"
 	"strings"
 	"sync"
 
 	mux "github.com/gorilla/mux"
+	"github.com/minio/minio-go/pkg/policy"
 	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/minio/pkg/errors"
 	"github.com/minio/minio/pkg/hash"
 )
 
@@ -36,8 +40,9 @@ import (
 // Enforces bucket policies for a bucket for a given tatusaction.
 func enforceBucketPolicy(bucket, action, resource, referer, sourceIP string, queryParams url.Values) (s3Error APIErrorCode) {
 	// Verify if bucket actually exists
-	if err := checkBucketExist(bucket, newObjectLayerFn()); err != nil {
-		err = errorCause(err)
+	objAPI := newObjectLayerFn()
+	if err := checkBucketExist(bucket, objAPI); err != nil {
+		err = errors.Cause(err)
 		switch err.(type) {
 		case BucketNameInvalid:
 			// Return error for invalid bucket name.
@@ -51,13 +56,12 @@ func enforceBucketPolicy(bucket, action, resource, referer, sourceIP string, que
 		return ErrInternalError
 	}
 
-	if globalBucketPolicies == nil {
+	// Fetch bucket policy, if policy is not set return access denied.
+	p, err := objAPI.GetBucketPolicy(bucket)
+	if err != nil {
 		return ErrAccessDenied
 	}
-
-	// Fetch bucket policy, if policy is not set return access denied.
-	policy := globalBucketPolicies.GetBucketPolicy(bucket)
-	if policy == nil {
+	if reflect.DeepEqual(p, emptyBucketPolicy) {
 		return ErrAccessDenied
 	}
 
@@ -65,7 +69,7 @@ func enforceBucketPolicy(bucket, action, resource, referer, sourceIP string, que
 	arn := bucketARNPrefix + strings.TrimSuffix(strings.TrimPrefix(resource, "/"), "/")
 
 	// Get conditions for policy verification.
-	conditionKeyMap := make(map[string]set.StringSet)
+	conditionKeyMap := make(policy.ConditionKeyMap)
 	for queryParam := range queryParams {
 		conditionKeyMap[queryParam] = set.CreateStringSet(queryParams.Get(queryParam))
 	}
@@ -78,26 +82,26 @@ func enforceBucketPolicy(bucket, action, resource, referer, sourceIP string, que
 	conditionKeyMap["ip"] = set.CreateStringSet(sourceIP)
 
 	// Validate action, resource and conditions with current policy statements.
-	if !bucketPolicyEvalStatements(action, arn, conditionKeyMap, policy.Statements) {
+	if !bucketPolicyEvalStatements(action, arn, conditionKeyMap, p.Statements) {
 		return ErrAccessDenied
 	}
 	return ErrNone
 }
 
 // Check if the action is allowed on the bucket/prefix.
-func isBucketActionAllowed(action, bucket, prefix string) bool {
-	if globalBucketPolicies == nil {
+func isBucketActionAllowed(action, bucket, prefix string, objectAPI ObjectLayer) bool {
+
+	bp, err := objectAPI.GetBucketPolicy(bucket)
+	if err != nil {
 		return false
 	}
-
-	policy := globalBucketPolicies.GetBucketPolicy(bucket)
-	if policy == nil {
+	if reflect.DeepEqual(bp, emptyBucketPolicy) {
 		return false
 	}
 	resource := bucketARNPrefix + path.Join(bucket, prefix)
 	var conditionKeyMap map[string]set.StringSet
 	// Validate action, resource and conditions with current policy statements.
-	return bucketPolicyEvalStatements(action, resource, conditionKeyMap, policy.Statements)
+	return bucketPolicyEvalStatements(action, resource, conditionKeyMap, bp.Statements)
 }
 
 // GetBucketLocationHandler - GET Bucket location.
@@ -116,15 +120,21 @@ func (api objectAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r *
 	s3Error := checkRequestAuthType(r, bucket, "s3:GetBucketLocation", globalMinioDefaultRegion)
 	if s3Error == ErrInvalidRegion {
 		// Clients like boto3 send getBucketLocation() call signed with region that is configured.
-		s3Error = checkRequestAuthType(r, "", "s3:GetBucketLocation", serverConfig.GetRegion())
+		s3Error = checkRequestAuthType(r, "", "s3:GetBucketLocation", globalServerConfig.GetRegion())
 	}
 	if s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
 
+	bucketLock := globalNSMutex.NewNSLock(bucket, "")
+	if err := bucketLock.GetRLock(globalObjectTimeout); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+	defer bucketLock.RUnlock()
+
 	if _, err := objectAPI.GetBucketInfo(bucket); err != nil {
-		errorIf(err, "Unable to fetch bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -132,7 +142,7 @@ func (api objectAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r *
 	// Generate response.
 	encodedSuccessResponse := encodeResponse(LocationResponse{})
 	// Get current region.
-	region := serverConfig.GetRegion()
+	region := globalServerConfig.GetRegion()
 	if region != globalMinioDefaultRegion {
 		encodedSuccessResponse = encodeResponse(LocationResponse{
 			Location: region,
@@ -161,7 +171,7 @@ func (api objectAPIHandlers) ListMultipartUploadsHandler(w http.ResponseWriter,
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucketMultipartUploads", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucketMultipartUploads", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -181,7 +191,6 @@ func (api objectAPIHandlers) ListMultipartUploadsHandler(w http.ResponseWriter,
 
 	listMultipartsInfo, err := objectAPI.ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
 	if err != nil {
-		errorIf(err, "Unable to list multipart uploads.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -208,7 +217,7 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 	s3Error := checkRequestAuthType(r, "", "", globalMinioDefaultRegion)
 	if s3Error == ErrInvalidRegion {
 		// Clients like boto3 send listBuckets() call signed with region that is configured.
-		s3Error = checkRequestAuthType(r, "", "", serverConfig.GetRegion())
+		s3Error = checkRequestAuthType(r, "", "", globalServerConfig.GetRegion())
 	}
 	if s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
@@ -217,7 +226,6 @@ func (api objectAPIHandlers) ListBucketsHandler(w http.ResponseWriter, r *http.R
 	// Invoke the list buckets.
 	bucketsInfo, err := objectAPI.ListBuckets()
 	if err != nil {
-		errorIf(err, "Unable to list buckets.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -242,7 +250,7 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	}
 
 	var authError APIErrorCode
-	if authError = checkRequestAuthType(r, bucket, "s3:DeleteObject", serverConfig.GetRegion()); authError != ErrNone {
+	if authError = checkRequestAuthType(r, bucket, "s3:DeleteObject", globalServerConfig.GetRegion()); authError != ErrNone {
 		// In the event access is denied, a 200 response should still be returned
 		// http://docs.aws.amazon.com/AmazonS3/latest/API/multiobjectdeleteapi.html
 		if authError != ErrAccessDenied {
@@ -300,16 +308,9 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 				}
 				return
 			}
-			objectLock := globalNSMutex.NewNSLock(bucket, obj.ObjectName)
-			if timedOutErr := objectLock.GetLock(globalObjectTimeout); timedOutErr != nil {
-				dErrs[i] = timedOutErr
-			} else {
-				defer objectLock.Unlock()
-
-				dErr := objectAPI.DeleteObject(bucket, obj.ObjectName)
-				if dErr != nil {
-					dErrs[i] = dErr
-				}
+			dErr := objectAPI.DeleteObject(bucket, obj.ObjectName)
+			if dErr != nil {
+				dErrs[i] = dErr
 			}
 		}(index, object)
 	}
@@ -325,13 +326,12 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 			deletedObjects = append(deletedObjects, object)
 			continue
 		}
-		if _, ok := errorCause(err).(ObjectNotFound); ok {
+		if _, ok := errors.Cause(err).(ObjectNotFound); ok {
 			// If the object is not found it should be
 			// accounted as deleted as per S3 spec.
 			deletedObjects = append(deletedObjects, object)
 			continue
 		}
-		errorIf(err, "Unable to delete object. %s", object.ObjectName)
 		// Error during delete should be collected separately.
 		deleteErrors = append(deleteErrors, DeleteError{
 			Code:    errorCodeResponse[toAPIErrorCode(err)].Code,
@@ -381,7 +381,7 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 	}
 
 	// PutBucket does not have any bucket action.
-	s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion())
+	s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion())
 	if s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
@@ -405,16 +405,15 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 	}
 
 	bucketLock := globalNSMutex.NewNSLock(bucket, "")
-	if bucketLock.GetLock(globalObjectTimeout) != nil {
-		writeErrorResponse(w, ErrOperationTimedOut, r.URL)
+	if err := bucketLock.GetLock(globalObjectTimeout); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 	defer bucketLock.Unlock()
 
 	// Proceed to creating a bucket.
-	err := objectAPI.MakeBucketWithLocation(bucket, "")
+	err := objectAPI.MakeBucketWithLocation(bucket, location)
 	if err != nil {
-		errorIf(err, "Unable to create a bucket.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -436,12 +435,24 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		return
 	}
 
+	bucket := mux.Vars(r)["bucket"]
+
 	// Require Content-Length to be set in the request
 	size := r.ContentLength
 	if size < 0 {
 		writeErrorResponse(w, ErrMissingContentLength, r.URL)
 		return
 	}
+	resource, err := getResource(r.URL.Path, r.Host, globalDomainName)
+	if err != nil {
+		writeErrorResponse(w, ErrInvalidRequest, r.URL)
+		return
+	}
+	// Make sure that the URL  does not contain object name.
+	if bucket != filepath.Clean(resource[1:]) {
+		writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
+		return
+	}
 
 	// Here the parameter is the size of the form data that should
 	// be loaded in memory, the remaining being put in temporary files.
@@ -480,7 +491,6 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	// Close multipart file
 	defer fileBody.Close()
 
-	bucket := mux.Vars(r)["bucket"]
 	formValues.Set("Bucket", bucket)
 
 	if fileName != "" && strings.Contains(formValues.Get("Key"), "${filename}") {
@@ -531,13 +541,11 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 	lengthRange := postPolicyForm.Conditions.ContentLengthRange
 	if lengthRange.Valid {
 		if fileSize < lengthRange.Min {
-			errorIf(err, "Unable to create object.")
 			writeErrorResponse(w, toAPIErrorCode(errDataTooSmall), r.URL)
 			return
 		}
 
 		if fileSize > lengthRange.Max || isMaxObjectSize(fileSize) {
-			errorIf(err, "Unable to create object.")
 			writeErrorResponse(w, toAPIErrorCode(errDataTooLarge), r.URL)
 			return
 		}
@@ -551,13 +559,6 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		return
 	}
 
-	objectLock := globalNSMutex.NewNSLock(bucket, object)
-	if objectLock.GetLock(globalObjectTimeout) != nil {
-		writeErrorResponse(w, ErrOperationTimedOut, r.URL)
-		return
-	}
-	defer objectLock.Unlock()
-
 	hashReader, err := hash.NewReader(fileBody, fileSize, "", "")
 	if err != nil {
 		errorIf(err, "Unable to initialize hashReader.")
@@ -565,15 +566,36 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		return
 	}
 
+	if objectAPI.IsEncryptionSupported() {
+		if hasSSECustomerHeader(formValues) && !hasSuffix(object, slashSeparator) { // handle SSE-C requests
+			var reader io.Reader
+			var key []byte
+			key, err = ParseSSECustomerHeader(formValues)
+			if err != nil {
+				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				return
+			}
+			reader, err = newEncryptReader(hashReader, key, metadata)
+			if err != nil {
+				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				return
+			}
+			info := ObjectInfo{Size: fileSize}
+			hashReader, err = hash.NewReader(reader, info.EncryptedSize(), "", "") // do not try to verify encrypted content
+			if err != nil {
+				writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+				return
+			}
+		}
+	}
+
 	objInfo, err := objectAPI.PutObject(bucket, object, hashReader, metadata)
 	if err != nil {
-		errorIf(err, "Unable to create object.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
-	port := r.Header.Get("X-Forward-Proto")
-	location := getObjectLocation(r.Host, port, bucket, object)
+	location := getObjectLocation(r, globalDomainName, bucket, object)
 	w.Header().Set("ETag", `"`+objInfo.ETag+`"`)
 	w.Header().Set("Location", location)
 
@@ -634,20 +656,12 @@ func (api objectAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.Re
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, bucket, "s3:ListBucket", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponseHeadersOnly(w, s3Error)
 		return
 	}
 
-	bucketLock := globalNSMutex.NewNSLock(bucket, "")
-	if bucketLock.GetRLock(globalObjectTimeout) != nil {
-		writeErrorResponseHeadersOnly(w, ErrOperationTimedOut)
-		return
-	}
-	defer bucketLock.RUnlock()
-
 	if _, err := objectAPI.GetBucketInfo(bucket); err != nil {
-		errorIf(err, "Unable to fetch bucket info.")
 		writeErrorResponseHeadersOnly(w, toAPIErrorCode(err))
 		return
 	}
@@ -664,7 +678,7 @@ func (api objectAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.
 	}
 
 	// DeleteBucket does not have any bucket action.
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -672,38 +686,12 @@ func (api objectAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]
 
-	bucketLock := globalNSMutex.NewNSLock(bucket, "")
-	if bucketLock.GetLock(globalObjectTimeout) != nil {
-		writeErrorResponse(w, ErrOperationTimedOut, r.URL)
-		return
-	}
-	defer bucketLock.Unlock()
-
 	// Attempt to delete bucket.
 	if err := objectAPI.DeleteBucket(bucket); err != nil {
-		errorIf(err, "Unable to delete a bucket.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
-	// Delete bucket access policy, if present - ignore any errors.
-	_ = removeBucketPolicy(bucket, objectAPI)
-
-	// Notify all peers (including self) to update in-memory state
-	S3PeersUpdateBucketPolicy(bucket, policyChange{true, nil})
-
-	// Delete notification config, if present - ignore any errors.
-	_ = removeNotificationConfig(bucket, objectAPI)
-
-	// Notify all peers (including self) to update in-memory state
-	S3PeersUpdateBucketNotification(bucket, nil)
-
-	// Delete listener config, if present - ignore any errors.
-	_ = removeListenerConfig(bucket, objectAPI)
-
-	// Notify all peers (including self) to update in-memory state
-	S3PeersUpdateBucketListener(bucket, []listenerConfig{})
-
 	// Write success response.
 	writeSuccessNoContent(w)
 }

cmd/bucket-handlers_test.go

@@ -24,6 +24,8 @@ import (
 	"net/http/httptest"
 	"strconv"
 	"testing"
+
+	"github.com/minio/minio/pkg/auth"
 )
 
 // Wrapper for calling GetBucketPolicy HTTP handler tests for both XL multiple disks and single node setup.
@@ -32,8 +34,7 @@ func TestGetBucketLocationHandler(t *testing.T) {
 }
 
 func testGetBucketLocationHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	initBucketPolicies(obj)
+	credentials auth.Credentials, t *testing.T) {
 
 	// test cases with sample input and expected output.
 	testCases := []struct {
@@ -153,7 +154,7 @@ func testGetBucketLocationHandler(obj ObjectLayer, instanceType, bucketName stri
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getReadOnlyBucketStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "TestGetBucketLocationHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyBucketStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "TestGetBucketLocationHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyBucketStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -177,8 +178,7 @@ func TestHeadBucketHandler(t *testing.T) {
 }
 
 func testHeadBucketHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	initBucketPolicies(obj)
+	credentials auth.Credentials, t *testing.T) {
 
 	// test cases with sample input and expected output.
 	testCases := []struct {
@@ -259,7 +259,7 @@ func testHeadBucketHandler(obj ObjectLayer, instanceType, bucketName string, api
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getReadOnlyBucketStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "TestHeadBucketHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyBucketStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "TestHeadBucketHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyBucketStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -284,8 +284,7 @@ func TestListMultipartUploadsHandler(t *testing.T) {
 
 // testListMultipartUploadsHandler - Tests validate listing of multipart uploads.
 func testListMultipartUploadsHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	initBucketPolicies(obj)
+	credentials auth.Credentials, t *testing.T) {
 
 	// Collection of non-exhaustive ListMultipartUploads test cases, valid errors
 	// and success responses.
@@ -494,7 +493,7 @@ func testListMultipartUploadsHandler(obj ObjectLayer, instanceType, bucketName s
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getWriteOnlyBucketStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "TestListMultipartUploadsHandler", bucketName, "", instanceType, apiRouter, anonReq, getWriteOnlyBucketStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "TestListMultipartUploadsHandler", bucketName, "", instanceType, apiRouter, anonReq, getWriteOnlyBucketStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -522,7 +521,7 @@ func TestListBucketsHandler(t *testing.T) {
 
 // testListBucketsHandler - Tests validate listing of buckets.
 func testListBucketsHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
+	credentials auth.Credentials, t *testing.T) {
 
 	testCases := []struct {
 		bucketName         string
@@ -592,7 +591,7 @@ func testListBucketsHandler(obj ObjectLayer, instanceType, bucketName string, ap
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getWriteOnlyObjectStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "ListBucketsHandler", "", "", instanceType, apiRouter, anonReq, getWriteOnlyObjectStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "ListBucketsHandler", "", "", instanceType, apiRouter, anonReq, getWriteOnlyObjectStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -615,8 +614,7 @@ func TestAPIDeleteMultipleObjectsHandler(t *testing.T) {
 }
 
 func testAPIDeleteMultipleObjectsHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	initBucketPolicies(obj)
+	credentials auth.Credentials, t *testing.T) {
 
 	var err error
 	// register event notifier.
@@ -805,7 +803,7 @@ func TestIsBucketActionAllowed(t *testing.T) {
 }
 
 func testIsBucketActionAllowedHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
+	credentials auth.Credentials, t *testing.T) {
 
 	testCases := []struct {
 		// input.
@@ -820,12 +818,7 @@ func testIsBucketActionAllowedHandler(obj ObjectLayer, instanceType, bucketName
 		{"s3:ListObject", "mybucket", "abc", false, false},
 	}
 	for i, testCase := range testCases {
-		if testCase.isGlobalPoliciesNil {
-			globalBucketPolicies = nil
-		} else {
-			initBucketPolicies(obj)
-		}
-		isAllowed := isBucketActionAllowed(testCase.action, testCase.bucket, testCase.prefix)
+		isAllowed := isBucketActionAllowed(testCase.action, testCase.bucket, testCase.prefix, obj)
 		if isAllowed != testCase.shouldPass {
 			t.Errorf("Case %d: Expected the response status to be `%t`, but instead found `%t`", i+1, testCase.shouldPass, isAllowed)
 		}

cmd/bucket-metadata.go

@@ -16,8 +16,6 @@
 
 package cmd
 
-import "encoding/json"
-
 // BucketMetaState - Interface to update bucket metadata in-memory
 // state.
 type BucketMetaState interface {
@@ -79,13 +77,7 @@ func (lc *localBucketMetaState) UpdateBucketPolicy(args *SetBucketPolicyPeerArgs
 	if objAPI == nil {
 		return errServerNotInitialized
 	}
-
-	var pCh policyChange
-	if err := json.Unmarshal(args.PChBytes, &pCh); err != nil {
-		return err
-	}
-
-	return globalBucketPolicies.SetBucketPolicy(args.Bucket, pCh)
+	return objAPI.RefreshBucketPolicy(args.Bucket)
 }
 
 // localBucketMetaState.SendEvent - sends event to local event notifier via

cmd/bucket-notification-datatypes.go

@@ -137,13 +137,13 @@ type bucketMeta struct {
 
 // Notification event object metadata.
 type objectMeta struct {
-	Key         string            `json:"key"`
-	Size        int64             `json:"size,omitempty"`
-	ETag        string            `json:"eTag,omitempty"`
-	ContentType string            `json:"contentType,omitempty"`
-	UserDefined map[string]string `json:"userDefined,omitempty"`
-	VersionID   string            `json:"versionId,omitempty"`
-	Sequencer   string            `json:"sequencer"`
+	Key          string            `json:"key"`
+	Size         int64             `json:"size,omitempty"`
+	ETag         string            `json:"eTag,omitempty"`
+	ContentType  string            `json:"contentType,omitempty"`
+	UserMetadata map[string]string `json:"userMetadata,omitempty"`
+	VersionID    string            `json:"versionId,omitempty"`
+	Sequencer    string            `json:"sequencer"`
 }
 
 const (
@@ -209,5 +209,5 @@ type arnSQS struct {
 
 // Stringer for constructing AWS ARN compatible string.
 func (m arnSQS) String() string {
-	return minioSqs + serverConfig.GetRegion() + ":" + m.AccountID + ":" + m.Type
+	return minioSqs + globalServerConfig.GetRegion() + ":" + m.AccountID + ":" + m.Type
 }

cmd/bucket-notification-handlers.go

@@ -22,10 +22,13 @@ import (
 	"encoding/xml"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
+	"syscall"
 	"time"
 
 	"github.com/gorilla/mux"
+	"github.com/minio/minio/pkg/errors"
 )
 
 const (
@@ -40,13 +43,18 @@ const (
 // not enabled on the bucket, the operation returns an empty
 // NotificationConfiguration element.
 func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
+
 	objAPI := api.ObjectAPI()
 	if objAPI == nil {
 		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if !objAPI.IsNotificationSupported() {
+		writeErrorResponse(w, ErrNotImplemented, r.URL)
+		return
+	}
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -56,20 +64,19 @@ func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter,
 
 	_, err := objAPI.GetBucketInfo(bucket)
 	if err != nil {
-		errorIf(err, "Unable to find bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
 	// Attempt to successfully load notification config.
 	nConfig, err := loadNotificationConfig(bucket, objAPI)
-	if err != nil && errorCause(err) != errNoSuchNotifications {
+	if err != nil && errors.Cause(err) != errNoSuchNotifications {
 		errorIf(err, "Unable to read notification configuration.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 	// For no notifications we write a dummy XML.
-	if errorCause(err) == errNoSuchNotifications {
+	if errors.Cause(err) == errNoSuchNotifications {
 		// Complies with the s3 behavior in this regard.
 		nConfig = &notificationConfig{}
 	}
@@ -94,13 +101,18 @@ func (api objectAPIHandlers) GetBucketNotificationHandler(w http.ResponseWriter,
 // By default, your bucket has no event notifications configured. That is,
 // the notification configuration will be an empty NotificationConfiguration.
 func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter, r *http.Request) {
+
 	objectAPI := api.ObjectAPI()
 	if objectAPI == nil {
 		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if !objectAPI.IsNotificationSupported() {
+		writeErrorResponse(w, ErrNotImplemented, r.URL)
+		return
+	}
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -110,7 +122,6 @@ func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter,
 
 	_, err := objectAPI.GetBucketInfo(bucket)
 	if err != nil {
-		errorIf(err, "Unable to find bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -150,6 +161,12 @@ func (api objectAPIHandlers) PutBucketNotificationHandler(w http.ResponseWriter,
 		return
 	}
 
+	// Convert the incoming ARNs properly to the GetRegion().
+	for i, queueConfig := range notificationCfg.QueueConfigs {
+		queueConfig.QueueARN = unmarshalSqsARN(queueConfig.QueueARN).String()
+		notificationCfg.QueueConfigs[i] = queueConfig
+	}
+
 	// Put bucket notification config.
 	err = PutBucketNotificationConfig(bucket, &notificationCfg, objectAPI)
 	if err != nil {
@@ -207,14 +224,6 @@ func writeNotification(w http.ResponseWriter, notification map[string][]Notifica
 		return err
 	}
 
-	// https://github.com/containous/traefik/issues/560
-	// https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events
-	//
-	// Proxies might buffer the connection to avoid this we
-	// need the proper MIME type before writing to client.
-	// This MIME header tells the proxies to avoid buffering
-	w.Header().Set("Content-Type", "text/event-stream")
-
 	// Add additional CRLF characters for client to
 	// differentiate the individual events properly.
 	_, err = w.Write(append(notificationBytes, crlf...))
@@ -226,25 +235,61 @@ func writeNotification(w http.ResponseWriter, notification map[string][]Notifica
 // CRLF character used for chunked transfer in accordance with HTTP standards.
 var crlf = []byte("\r\n")
 
-// sendBucketNotification - writes notification back to client on the response writer
-// for each notification input, otherwise writes whitespace characters periodically
-// to keep the connection active. Each notification messages are terminated by CRLF
-// character. Upon any error received on response writer the for loop exits.
-func sendBucketNotification(w http.ResponseWriter, arnListenerCh <-chan []NotificationEvent) {
-	var dummyEvents = map[string][]NotificationEvent{"Records": nil}
-	// Continuously write to client either timely empty structures
-	// every 5 seconds, or return back the notifications.
+// listenChan A `listenChan` provides a data channel to send event
+// notifications on and `doneCh` to signal that events are no longer
+// being received. It also sends empty events (whitespace) to keep the
+// underlying connection alive.
+type listenChan struct {
+	doneCh chan struct{}
+	dataCh chan []NotificationEvent
+}
+
+// newListenChan returns a listenChan with properly initialized
+// unbuffered channels.
+func newListenChan() *listenChan {
+	return &listenChan{
+		doneCh: make(chan struct{}),
+		dataCh: make(chan []NotificationEvent),
+	}
+}
+
+// sendNotificationEvent sends notification events on the data channel
+// unless doneCh is not closed
+func (l *listenChan) sendNotificationEvent(events []NotificationEvent) {
+	select {
+	// Returns immediately if receiver has quit.
+	case <-l.doneCh:
+	// Blocks until receiver is available.
+	case l.dataCh <- events:
+	}
+}
+
+// waitForListener writes event notification OR whitespaces on
+// ResponseWriter until client closes connection
+func (l *listenChan) waitForListener(w http.ResponseWriter) {
+
+	// Logs errors other than EPIPE and ECONNRESET.
+	// EPIPE and ECONNRESET indicate that the client stopped
+	// listening to notification events.
+	logClientError := func(err error, msg string) {
+		if oe, ok := err.(*net.OpError); ok && (oe.Err == syscall.EPIPE || oe.Err ==
+			syscall.ECONNRESET) {
+			errorIf(err, msg)
+		}
+	}
+
+	emptyEvent := map[string][]NotificationEvent{"Records": nil}
+	defer close(l.doneCh)
 	for {
 		select {
-		case events := <-arnListenerCh:
+		case events := <-l.dataCh:
 			if err := writeNotification(w, map[string][]NotificationEvent{"Records": events}); err != nil {
-				errorIf(err, "Unable to write notification to client.")
+				logClientError(err, "Unable to write notification")
 				return
 			}
-		case <-time.After(globalSNSConnAlive): // Wait for global conn active seconds.
-			if err := writeNotification(w, dummyEvents); err != nil {
-				// FIXME - do not log for all errors.
-				errorIf(err, "Unable to write notification to client.")
+		case <-time.After(globalSNSConnAlive):
+			if err := writeNotification(w, emptyEvent); err != nil {
+				logClientError(err, "Unable to write empty notification")
 				return
 			}
 		}
@@ -259,8 +304,11 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
 		return
 	}
-
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if !objAPI.IsNotificationSupported() {
+		writeErrorResponse(w, ErrNotImplemented, r.URL)
+		return
+	}
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -291,7 +339,6 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 
 	_, err := objAPI.GetBucketInfo(bucket)
 	if err != nil {
-		errorIf(err, "Unable to get bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -301,7 +348,7 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 	accountARN := fmt.Sprintf(
 		"%s:%s:%s:%s-%s",
 		minioTopic,
-		serverConfig.GetRegion(),
+		globalServerConfig.GetRegion(),
 		accountID,
 		snsTypeMinio,
 		targetServer,
@@ -340,12 +387,11 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 		},
 	}
 
-	// Setup a listening channel that will receive notifications
-	// from the RPC handler.
-	nEventCh := make(chan []NotificationEvent)
-	defer close(nEventCh)
+	// Setup a listen channel to receive notifications like
+	// s3:ObjectCreated, s3:ObjectDeleted etc.
+	nListenCh := newListenChan()
 	// Add channel for listener events
-	if err = globalEventNotifier.AddListenerChan(accountARN, nEventCh); err != nil {
+	if err = globalEventNotifier.AddListenerChan(accountARN, nListenCh); err != nil {
 		errorIf(err, "Error adding a listener!")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
@@ -355,8 +401,8 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 	defer globalEventNotifier.RemoveListenerChan(accountARN)
 
 	// Update topic config to bucket config and persist - as soon
-	// as this call compelets, events may start appearing in
-	// nEventCh
+	// as this call completes, events may start appearing in
+	// nListenCh
 	lc := listenerConfig{
 		TopicConfig:  *topicCfg,
 		TargetServer: targetServer,
@@ -372,8 +418,16 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 	// Add all common headers.
 	setCommonHeaders(w)
 
-	// Start sending bucket notifications.
-	sendBucketNotification(w, nEventCh)
+	// https://github.com/containous/traefik/issues/560
+	// https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events
+	//
+	// Proxies might buffer the connection to avoid this we
+	// need the proper MIME type before writing to client.
+	// This MIME header tells the proxies to avoid buffering
+	w.Header().Set("Content-Type", "text/event-stream")
+
+	// Start writing bucket notifications to ResponseWriter.
+	nListenCh.waitForListener(w)
 }
 
 // AddBucketListenerConfig - Updates on disk state of listeners, and

cmd/bucket-notification-handlers_test.go

@@ -21,13 +21,19 @@ import (
 	"bytes"
 	"encoding/json"
 	"encoding/xml"
+	"errors"
 	"io"
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"os"
 	"reflect"
+	"sync"
 	"testing"
+
+	"time"
+
+	"github.com/minio/minio/pkg/auth"
 )
 
 // Implement a dummy flush writer.
@@ -111,7 +117,47 @@ func TestWriteNotification(t *testing.T) {
 	}
 }
 
-func TestSendBucketNotification(t *testing.T) {
+// testResponseWriter implements `http.ResponseWriter` that buffers
+// response body in a `bytes.Buffer` and returns error after `failCount`
+// calls to `Write` method
+type testResponseWriter struct {
+	mu        sync.Mutex
+	failCount int
+	buf       *bytes.Buffer
+	m         http.Header
+}
+
+func newTestResponseWriter(failAt int) *testResponseWriter {
+	return &testResponseWriter{
+		buf:       new(bytes.Buffer),
+		m:         make(http.Header),
+		failCount: failAt,
+	}
+}
+
+func (trw *testResponseWriter) Flush() {
+}
+
+func (trw *testResponseWriter) Write(p []byte) (int, error) {
+	trw.mu.Lock()
+	defer trw.mu.Unlock()
+
+	if trw.failCount == 0 {
+		return 0, errors.New("Custom error")
+	}
+	trw.failCount--
+
+	return trw.buf.Write(p)
+}
+
+func (trw *testResponseWriter) Header() http.Header {
+	return trw.m
+}
+
+func (trw *testResponseWriter) WriteHeader(i int) {
+}
+
+func TestListenChan(t *testing.T) {
 	// Initialize a new test config.
 	root, err := newTestConfig(globalMinioDefaultRegion)
 	if err != nil {
@@ -119,18 +165,8 @@ func TestSendBucketNotification(t *testing.T) {
 	}
 	defer os.RemoveAll(root)
 
-	eventCh := make(chan []NotificationEvent)
-
-	// Create a Pipe with FlushWriter on the write-side and bufio.Scanner
-	// on the reader-side to receive notification over the listen channel in a
-	// synchronized manner.
-	pr, pw := io.Pipe()
-	fw := newFlushWriter(pw)
-	scanner := bufio.NewScanner(pr)
-	// Start a go-routine to wait for notification events.
-	go func(listenerCh <-chan []NotificationEvent) {
-		sendBucketNotification(fw, listenerCh)
-	}(eventCh)
+	// Create a listen channel to manage notifications
+	nListenCh := newListenChan()
 
 	// Construct notification events to be passed on the events channel.
 	var events []NotificationEvent
@@ -140,37 +176,68 @@ func TestSendBucketNotification(t *testing.T) {
 		ObjectCreatedCopy,
 		ObjectCreatedCompleteMultipartUpload,
 	}
+
 	for _, evType := range evTypes {
 		events = append(events, newNotificationEvent(eventData{
 			Type: evType,
 		}))
 	}
-	// Send notification events to the channel on which sendBucketNotification
-	// is waiting on.
-	eventCh <- events
 
-	// Read from the pipe connected to the ResponseWriter.
-	scanner.Scan()
-	notificationBytes := scanner.Bytes()
-
-	// Close the read-end and send an empty notification event on the channel
-	// to signal sendBucketNotification to terminate.
-	pr.Close()
-	eventCh <- []NotificationEvent{}
-	close(eventCh)
-
-	// Checking if the notification are the same as those sent over the channel.
-	var notifications map[string][]NotificationEvent
-	err = json.Unmarshal(notificationBytes, &notifications)
-	if err != nil {
-		t.Fatal("Failed to Unmarshal notification")
-	}
-	records := notifications["Records"]
-	for i, rec := range records {
-		if rec.EventName == evTypes[i].String() {
-			continue
+	// Send notification events one-by-one
+	go func() {
+		for _, event := range events {
+			nListenCh.sendNotificationEvent([]NotificationEvent{event})
 		}
-		t.Errorf("Failed to receive %d event %s", i, evTypes[i].String())
+	}()
+
+	// Create a http.ResponseWriter that fails after len(events)
+	// number of times
+	trw := newTestResponseWriter(len(events))
+
+	// Wait for all (4) notification events to be received
+	nListenCh.waitForListener(trw)
+
+	// Used to read JSON-formatted event stream line-by-line
+	scanner := bufio.NewScanner(trw.buf)
+	var records map[string][]NotificationEvent
+	for i := 0; scanner.Scan(); i++ {
+		err = json.Unmarshal(scanner.Bytes(), &records)
+		if err != nil {
+			t.Fatalf("Failed to unmarshal json %v", err)
+		}
+
+		nEvent := records["Records"][0]
+		if nEvent.EventName != evTypes[i].String() {
+			t.Errorf("notification event name mismatch, expected %s but got %s", evTypes[i], nEvent.EventName)
+		}
+	}
+}
+
+func TestSendNotificationEvent(t *testing.T) {
+	// This test verifies that sendNotificationEvent function
+	// returns once listenChan.doneCh is closed
+
+	l := newListenChan()
+	testCh := make(chan struct{})
+	timeout := 5 * time.Second
+
+	go func() {
+		// Send one empty notification event on listenChan
+		events := []NotificationEvent{{}}
+		l.sendNotificationEvent(events)
+		testCh <- struct{}{}
+	}()
+
+	// close l.doneCh to signal client exiting from
+	// ListenBucketNotification API call
+	close(l.doneCh)
+
+	select {
+	case <-time.After(timeout):
+		t.Fatalf("sendNotificationEvent didn't return after %v seconds", timeout)
+	case <-testCh:
+		// If we reach this case, sendNotificationEvent
+		// returned on closing l.doneCh
 	}
 }
 
@@ -181,7 +248,7 @@ func TestGetBucketNotificationHandler(t *testing.T) {
 }
 
 func testGetBucketNotificationHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
+	credentials auth.Credentials, t *testing.T) {
 	// declare sample configs
 	filterRules := []filterRule{
 		{
@@ -254,7 +321,7 @@ func TestPutBucketNotificationHandler(t *testing.T) {
 }
 
 func testPutBucketNotificationHandler(obj ObjectLayer, instanceType,
-	bucketName string, apiRouter http.Handler, credentials credential,
+	bucketName string, apiRouter http.Handler, credentials auth.Credentials,
 	t *testing.T) {
 
 	// declare sample configs
@@ -344,7 +411,7 @@ func TestListenBucketNotificationNilHandler(t *testing.T) {
 }
 
 func testListenBucketNotificationNilHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
+	credentials auth.Credentials, t *testing.T) {
 	// get random bucket name.
 	randBucket := getRandomBucketName()
 
@@ -371,7 +438,7 @@ func testListenBucketNotificationNilHandler(obj ObjectLayer, instanceType, bucke
 }
 
 func testRemoveNotificationConfig(obj ObjectLayer, instanceType,
-	bucketName string, apiRouter http.Handler, credentials credential,
+	bucketName string, apiRouter http.Handler, credentials auth.Credentials,
 	t *testing.T) {
 
 	invalidBucket := "Invalid\\Bucket"

cmd/bucket-notification-utils.go

@@ -116,9 +116,13 @@ func checkARN(arn, arnType string) APIErrorCode {
 	if len(strs) != 6 {
 		return ErrARNNotification
 	}
-	if serverConfig.GetRegion() != "" {
+
+	// Server region is allowed to be empty by default,
+	// in such a scenario ARN region is not validating
+	// allowing all regions.
+	if sregion := globalServerConfig.GetRegion(); sregion != "" {
 		region := strs[3]
-		if region != serverConfig.GetRegion() {
+		if region != sregion {
 			return ErrRegionNotification
 		}
 	}
@@ -142,34 +146,34 @@ func isValidQueueID(queueARN string) bool {
 	// Is Queue identifier valid?.
 
 	if isAMQPQueue(sqsARN) { // AMQP eueue.
-		amqpN := serverConfig.Notify.GetAMQPByID(sqsARN.AccountID)
+		amqpN := globalServerConfig.Notify.GetAMQPByID(sqsARN.AccountID)
 		return amqpN.Enable && amqpN.URL != ""
 	} else if isMQTTQueue(sqsARN) {
-		mqttN := serverConfig.Notify.GetMQTTByID(sqsARN.AccountID)
+		mqttN := globalServerConfig.Notify.GetMQTTByID(sqsARN.AccountID)
 		return mqttN.Enable && mqttN.Broker != ""
 	} else if isNATSQueue(sqsARN) {
-		natsN := serverConfig.Notify.GetNATSByID(sqsARN.AccountID)
+		natsN := globalServerConfig.Notify.GetNATSByID(sqsARN.AccountID)
 		return natsN.Enable && natsN.Address != ""
 	} else if isElasticQueue(sqsARN) { // Elastic queue.
-		elasticN := serverConfig.Notify.GetElasticSearchByID(sqsARN.AccountID)
+		elasticN := globalServerConfig.Notify.GetElasticSearchByID(sqsARN.AccountID)
 		return elasticN.Enable && elasticN.URL != ""
 	} else if isRedisQueue(sqsARN) { // Redis queue.
-		redisN := serverConfig.Notify.GetRedisByID(sqsARN.AccountID)
+		redisN := globalServerConfig.Notify.GetRedisByID(sqsARN.AccountID)
 		return redisN.Enable && redisN.Addr != ""
 	} else if isPostgreSQLQueue(sqsARN) {
-		pgN := serverConfig.Notify.GetPostgreSQLByID(sqsARN.AccountID)
+		pgN := globalServerConfig.Notify.GetPostgreSQLByID(sqsARN.AccountID)
 		// Postgres can work with only default conn. info.
 		return pgN.Enable
 	} else if isMySQLQueue(sqsARN) {
-		msqlN := serverConfig.Notify.GetMySQLByID(sqsARN.AccountID)
+		msqlN := globalServerConfig.Notify.GetMySQLByID(sqsARN.AccountID)
 		// Mysql can work with only default conn. info.
 		return msqlN.Enable
 	} else if isKafkaQueue(sqsARN) {
-		kafkaN := serverConfig.Notify.GetKafkaByID(sqsARN.AccountID)
+		kafkaN := globalServerConfig.Notify.GetKafkaByID(sqsARN.AccountID)
 		return (kafkaN.Enable && len(kafkaN.Brokers) > 0 &&
 			kafkaN.Topic != "")
 	} else if isWebhookQueue(sqsARN) {
-		webhookN := serverConfig.Notify.GetWebhookByID(sqsARN.AccountID)
+		webhookN := globalServerConfig.Notify.GetWebhookByID(sqsARN.AccountID)
 		return webhookN.Enable && webhookN.Endpoint != ""
 	}
 	return false
@@ -273,9 +277,13 @@ func unmarshalSqsARN(queueARN string) (mSqs arnSQS) {
 	if len(strs) != 6 {
 		return
 	}
-	if serverConfig.GetRegion() != "" {
+
+	// Server region is allowed to be empty by default,
+	// in such a scenario ARN region is not validating
+	// allowing all regions.
+	if sregion := globalServerConfig.GetRegion(); sregion != "" {
 		region := strs[3]
-		if region != serverConfig.GetRegion() {
+		if region != sregion {
 			return
 		}
 	}

cmd/bucket-policy-handlers.go

@@ -17,7 +17,7 @@
 package cmd
 
 import (
-	"fmt"
+	"encoding/json"
 	"io"
 	"io/ioutil"
 	"net"
@@ -27,7 +27,8 @@ import (
 
 	humanize "github.com/dustin/go-humanize"
 	mux "github.com/gorilla/mux"
-	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/minio-go/pkg/policy"
+	"github.com/minio/minio/pkg/errors"
 	"github.com/minio/minio/pkg/wildcard"
 )
 
@@ -36,7 +37,8 @@ const maxAccessPolicySize = 20 * humanize.KiByte
 
 // Verify if a given action is valid for the url path based on the
 // existing bucket access policy.
-func bucketPolicyEvalStatements(action string, resource string, conditions map[string]set.StringSet, statements []policyStatement) bool {
+func bucketPolicyEvalStatements(action string, resource string, conditions policy.ConditionKeyMap,
+	statements []policy.Statement) bool {
 	for _, statement := range statements {
 		if bucketPolicyMatchStatement(action, resource, conditions, statement) {
 			if statement.Effect == "Allow" {
@@ -52,7 +54,8 @@ func bucketPolicyEvalStatements(action string, resource string, conditions map[s
 }
 
 // Verify if action, resource and conditions match input policy statement.
-func bucketPolicyMatchStatement(action string, resource string, conditions map[string]set.StringSet, statement policyStatement) bool {
+func bucketPolicyMatchStatement(action string, resource string, conditions policy.ConditionKeyMap,
+	statement policy.Statement) bool {
 	// Verify if action, resource and condition match in given statement.
 	return (bucketPolicyActionMatch(action, statement) &&
 		bucketPolicyResourceMatch(resource, statement) &&
@@ -60,7 +63,7 @@ func bucketPolicyMatchStatement(action string, resource string, conditions map[s
 }
 
 // Verify if given action matches with policy statement.
-func bucketPolicyActionMatch(action string, statement policyStatement) bool {
+func bucketPolicyActionMatch(action string, statement policy.Statement) bool {
 	return !statement.Actions.FuncMatch(actionMatch, action).IsEmpty()
 }
 
@@ -95,7 +98,7 @@ func isIPInCIDR(cidr, ip string) bool {
 }
 
 // Verify if given resource matches with policy statement.
-func bucketPolicyResourceMatch(resource string, statement policyStatement) bool {
+func bucketPolicyResourceMatch(resource string, statement policy.Statement) bool {
 	// the resource rule for object could contain "*" wild card.
 	// the requested object can be given access based on the already set bucket policy if
 	// the match is successful.
@@ -104,7 +107,7 @@ func bucketPolicyResourceMatch(resource string, statement policyStatement) bool
 }
 
 // Verify if given condition matches with policy statement.
-func bucketPolicyConditionMatch(conditions map[string]set.StringSet, statement policyStatement) bool {
+func bucketPolicyConditionMatch(conditions policy.ConditionKeyMap, statement policy.Statement) bool {
 	// Supports following conditions.
 	// - StringEquals
 	// - StringNotEquals
@@ -223,7 +226,7 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -234,7 +237,6 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
 	// Before proceeding validate if bucket exists.
 	_, err := objAPI.GetBucketInfo(bucket)
 	if err != nil {
-		errorIf(err, "Unable to find bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -260,13 +262,29 @@ func (api objectAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *ht
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
-
-	// Parse validate and save bucket policy.
-	if s3Error := parseAndPersistBucketPolicy(bucket, policyBytes, objAPI); s3Error != ErrNone {
+	policyInfo := policy.BucketAccessPolicy{}
+	if err = json.Unmarshal(policyBytes, &policyInfo); err != nil {
+		writeErrorResponse(w, ErrInvalidPolicyDocument, r.URL)
+		return
+	}
+	// Parse check bucket policy.
+	if s3Error := checkBucketPolicyResources(bucket, policyInfo); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
 
+	if err = objAPI.SetBucketPolicy(bucket, policyInfo); err != nil {
+		err = errors.Cause(err)
+		switch err.(type) {
+		case NotImplemented:
+			// Return error for invalid bucket name.
+			writeErrorResponse(w, ErrNotImplemented, r.URL)
+		default:
+			writeErrorResponse(w, ErrMalformedPolicy, r.URL)
+		}
+		return
+	}
+
 	// Success.
 	writeSuccessNoContent(w)
 }
@@ -282,7 +300,7 @@ func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -293,20 +311,14 @@ func (api objectAPIHandlers) DeleteBucketPolicyHandler(w http.ResponseWriter, r
 	// Before proceeding validate if bucket exists.
 	_, err := objAPI.GetBucketInfo(bucket)
 	if err != nil {
-		errorIf(err, "Unable to find bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
 	// Delete bucket access policy, by passing an empty policy
 	// struct.
-	if err := persistAndNotifyBucketPolicyChange(bucket, policyChange{true, nil}, objAPI); err != nil {
-		switch err.(type) {
-		case BucketPolicyNotFound:
-			writeErrorResponse(w, ErrNoSuchBucketPolicy, r.URL)
-		default:
-			writeErrorResponse(w, ErrInternalError, r.URL)
-		}
+	if err := objAPI.DeleteBucketPolicy(bucket); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
@@ -325,7 +337,7 @@ func (api objectAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *ht
 		return
 	}
 
-	if s3Error := checkRequestAuthType(r, "", "", serverConfig.GetRegion()); s3Error != ErrNone {
+	if s3Error := checkRequestAuthType(r, "", "", globalServerConfig.GetRegion()); s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}
@@ -336,24 +348,24 @@ func (api objectAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *ht
 	// Before proceeding validate if bucket exists.
 	_, err := objAPI.GetBucketInfo(bucket)
 	if err != nil {
-		errorIf(err, "Unable to find bucket info.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
 	// Read bucket access policy.
-	policy, err := readBucketPolicy(bucket, objAPI)
+	policy, err := objAPI.GetBucketPolicy(bucket)
 	if err != nil {
-		errorIf(err, "Unable to read bucket policy.")
-		switch err.(type) {
-		case BucketPolicyNotFound:
-			writeErrorResponse(w, ErrNoSuchBucketPolicy, r.URL)
-		default:
-			writeErrorResponse(w, ErrInternalError, r.URL)
-		}
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	policyBytes, err := json.Marshal(&policy)
+	if err != nil {
+		errorIf(err, "Unable to marshal bucket policy.")
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
 
 	// Write to client.
-	fmt.Fprint(w, policy)
+	w.Write(policyBytes)
 }

cmd/bucket-policy-handlers_test.go

@@ -25,15 +25,17 @@ import (
 	"net/http/httptest"
 	"testing"
 
+	"github.com/minio/minio-go/pkg/policy"
 	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/minio/pkg/auth"
 )
 
 // Tests validate Bucket policy resource matcher.
 func TestBucketPolicyResourceMatch(t *testing.T) {
 
 	// generates statement with given resource..
-	generateStatement := func(resource string) policyStatement {
-		statement := policyStatement{}
+	generateStatement := func(resource string) policy.Statement {
+		statement := policy.Statement{}
 		statement.Resources = set.CreateStringSet([]string{resource}...)
 		return statement
 	}
@@ -45,7 +47,7 @@ func TestBucketPolicyResourceMatch(t *testing.T) {
 
 	testCases := []struct {
 		resourceToMatch       string
-		statement             policyStatement
+		statement             policy.Statement
 		expectedResourceMatch bool
 	}{
 		// Test case 1-4.
@@ -85,7 +87,7 @@ func TestBucketPolicyResourceMatch(t *testing.T) {
 }
 
 // TestBucketPolicyActionMatch - Test validates whether given action on the
-// bucket/object matches the allowed actions in policyStatement.
+// bucket/object matches the allowed actions in policy.Statement.
 // This test preserves the allowed actions for all 3 sets of policies, that is read-write,read-only, write-only.
 // The intention of the test is to catch any changes made to allowed action for on eof the above 3 major policy groups mentioned.
 func TestBucketPolicyActionMatch(t *testing.T) {
@@ -94,7 +96,7 @@ func TestBucketPolicyActionMatch(t *testing.T) {
 
 	testCases := []struct {
 		action         string
-		statement      policyStatement
+		statement      policy.Statement
 		expectedResult bool
 	}{
 		// s3:GetBucketLocation is the action necessary to be present in the bucket policy to allow
@@ -247,8 +249,7 @@ func TestPutBucketPolicyHandler(t *testing.T) {
 
 // testPutBucketPolicyHandler - Test for Bucket policy end point.
 func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	initBucketPolicies(obj)
+	credentials auth.Credentials, t *testing.T) {
 
 	bucketName1 := fmt.Sprintf("%s-1", bucketName)
 	if err := obj.MakeBucketWithLocation(bucketName1, ""); err != nil {
@@ -428,7 +429,7 @@ func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getWriteOnlyObjectStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "PutBucketPolicyHandler", bucketName, "", instanceType, apiRouter, anonReq, getWriteOnlyObjectStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "PutBucketPolicyHandler", bucketName, "", instanceType, apiRouter, anonReq, getWriteOnlyObjectStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -445,6 +446,7 @@ func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 	// execute the object layer set to `nil` test.
 	// `ExecObjectLayerAPINilTest` manages the operation.
 	ExecObjectLayerAPINilTest(t, nilBucket, "", instanceType, apiRouter, nilReq)
+
 }
 
 // Wrapper for calling Get Bucket Policy HTTP handler tests for both XL multiple disks and single node setup.
@@ -454,10 +456,7 @@ func TestGetBucketPolicyHandler(t *testing.T) {
 
 // testGetBucketPolicyHandler - Test for end point which fetches the access policy json of the given bucket.
 func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	// initialize bucket policy.
-	initBucketPolicies(obj)
-
+	credentials auth.Credentials, t *testing.T) {
 	// template for constructing HTTP request body for PUT bucket policy.
 	bucketPolicyTemplate := `{"Version":"2012-10-17","Statement":[{"Action":["s3:GetBucketLocation","s3:ListBucket"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::%s"],"Sid":""},{"Action":["s3:GetObject"],"Effect":"Allow","Principal":{"AWS":["*"]},"Resource":["arn:aws:s3:::%s/this*"],"Sid":""}]}`
 
@@ -617,7 +616,7 @@ func testGetBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getWriteOnlyObjectStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "GetBucketPolicyHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyObjectStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "GetBucketPolicyHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyObjectStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -643,9 +642,7 @@ func TestDeleteBucketPolicyHandler(t *testing.T) {
 
 // testDeleteBucketPolicyHandler - Test for Delete bucket policy end point.
 func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
-	credentials credential, t *testing.T) {
-	// initialize bucket policy.
-	initBucketPolicies(obj)
+	credentials auth.Credentials, t *testing.T) {
 
 	// template for constructing HTTP request body for PUT bucket policy.
 	bucketPolicyTemplate := `{
@@ -822,7 +819,7 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 	// ExecObjectLayerAPIAnonTest - Calls the HTTP API handler using the anonymous request, validates the ErrAccessDeniedResponse,
 	// sets the bucket policy using the policy statement generated from `getWriteOnlyObjectStatement` so that the
 	// unsigned request goes through and its validated again.
-	ExecObjectLayerAPIAnonTest(t, "DeleteBucketPolicyHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyObjectStatement)
+	ExecObjectLayerAPIAnonTest(t, obj, "DeleteBucketPolicyHandler", bucketName, "", instanceType, apiRouter, anonReq, getReadOnlyObjectStatement)
 
 	// HTTP request for testing when `objectLayer` is set to `nil`.
 	// There is no need to use an existing bucket and valid input for creating the request
@@ -843,28 +840,28 @@ func testDeleteBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName str
 
 // TestBucketPolicyConditionMatch - Tests to validate whether bucket policy conditions match.
 func TestBucketPolicyConditionMatch(t *testing.T) {
-	// obtain the inner map[string]set.StringSet for policyStatement.Conditions.
+	// obtain the inner map[string]set.StringSet for policy.Statement.Conditions.
 	getInnerMap := func(key2, value string) map[string]set.StringSet {
 		innerMap := make(map[string]set.StringSet)
 		innerMap[key2] = set.CreateStringSet(value)
 		return innerMap
 	}
 
-	// obtain policyStatement with Conditions set.
-	getStatementWithCondition := func(key1, key2, value string) policyStatement {
+	// obtain policy.Statement with Conditions set.
+	getStatementWithCondition := func(key1, key2, value string) policy.Statement {
 		innerMap := getInnerMap(key2, value)
 		// to set policyStatment.Conditions .
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions[key1] = innerMap
 		// new policy statement.
-		statement := policyStatement{}
+		statement := policy.Statement{}
 		// set the condition.
 		statement.Conditions = conditions
 		return statement
 	}
 
 	testCases := []struct {
-		statementCondition policyStatement
+		statementCondition policy.Statement
 		condition          map[string]set.StringSet
 
 		expectedMatch bool

cmd/bucket-policy-parser.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,12 +26,16 @@ import (
 	"sort"
 	"strings"
 
+	"github.com/minio/minio-go/pkg/policy"
 	"github.com/minio/minio-go/pkg/set"
 )
 
-var conditionKeyActionMap = map[string]set.StringSet{
-	"s3:prefix":   set.CreateStringSet("s3:ListBucket"),
-	"s3:max-keys": set.CreateStringSet("s3:ListBucket"),
+var emptyBucketPolicy = policy.BucketAccessPolicy{}
+
+var conditionKeyActionMap = policy.ConditionKeyMap{
+	"s3:prefix": set.CreateStringSet("s3:ListBucket", "s3:ListBucketMultipartUploads"),
+	"s3:max-keys": set.CreateStringSet("s3:ListBucket", "s3:ListBucketMultipartUploads",
+		"s3:ListMultipartUploadParts"),
 }
 
 // supportedActionMap - lists all the actions supported by minio.
@@ -49,41 +53,16 @@ var supportedConditionsKey = set.CreateStringSet("s3:prefix", "s3:max-keys", "aw
 // supportedEffectMap - supported effects.
 var supportedEffectMap = set.CreateStringSet("Allow", "Deny")
 
-// Statement - minio policy statement
-type policyStatement struct {
-	Actions    set.StringSet                       `json:"Action"`
-	Conditions map[string]map[string]set.StringSet `json:"Condition,omitempty"`
-	Effect     string
-	Principal  interface{}   `json:"Principal"`
-	Resources  set.StringSet `json:"Resource"`
-	Sid        string
-}
-
-// bucketPolicy - collection of various bucket policy statements.
-type bucketPolicy struct {
-	Version    string            // date in YYYY-MM-DD format
-	Statements []policyStatement `json:"Statement"`
-}
-
-// Stringer implementation for the bucket policies.
-func (b bucketPolicy) String() string {
-	bbytes, err := json.Marshal(&b)
-	if err != nil {
-		errorIf(err, "Unable to marshal bucket policy into JSON %#v", b)
-		return ""
-	}
-	return string(bbytes)
-}
-
 // isValidActions - are actions valid.
 func isValidActions(actions set.StringSet) (err error) {
 	// Statement actions cannot be empty.
-	if len(actions) == 0 {
+	if actions.IsEmpty() {
 		err = errors.New("Action list cannot be empty")
 		return err
 	}
 	if unsupportedActions := actions.Difference(supportedActionMap); !unsupportedActions.IsEmpty() {
-		err = fmt.Errorf("Unsupported actions found: ‘%#v’, please validate your policy document", unsupportedActions)
+		err = fmt.Errorf("Unsupported actions found: ‘%#v’, please validate your policy document",
+			unsupportedActions)
 		return err
 	}
 	return nil
@@ -106,7 +85,7 @@ func isValidEffect(effect string) (err error) {
 // isValidResources - are valid resources.
 func isValidResources(resources set.StringSet) (err error) {
 	// Statement resources cannot be empty.
-	if len(resources) == 0 {
+	if resources.IsEmpty() {
 		err = errors.New("Resource list cannot be empty")
 		return err
 	}
@@ -124,60 +103,17 @@ func isValidResources(resources set.StringSet) (err error) {
 	return nil
 }
 
-// Parse principals parses a incoming json. Handles cases for
-// these three combinations.
-// - "Principal": "*",
-// - "Principal": { "AWS" : "*" }
-// - "Principal": { "AWS" : [ "*" ]}
-func parsePrincipals(principal interface{}) set.StringSet {
-	principals, ok := principal.(map[string]interface{})
-	if !ok {
-		var principalStr string
-		principalStr, ok = principal.(string)
-		if ok {
-			return set.CreateStringSet(principalStr)
-		}
-	} // else {
-	var principalStrs []string
-	for _, p := range principals {
-		principalStr, isStr := p.(string)
-		if !isStr {
-			principalsAdd, isInterface := p.([]interface{})
-			if !isInterface {
-				principalStrsAddr, isStrs := p.([]string)
-				if !isStrs {
-					continue
-				}
-				principalStrs = append(principalStrs, principalStrsAddr...)
-			} else {
-				for _, pa := range principalsAdd {
-					var pstr string
-					pstr, isStr = pa.(string)
-					if !isStr {
-						continue
-					}
-					principalStrs = append(principalStrs, pstr)
-				}
-			}
-			continue
-		} // else {
-		principalStrs = append(principalStrs, principalStr)
-	}
-	return set.CreateStringSet(principalStrs...)
-}
-
 // isValidPrincipals - are valid principals.
-func isValidPrincipals(principal interface{}) (err error) {
-	principals := parsePrincipals(principal)
-	// Statement principal should have a value.
-	if len(principals) == 0 {
-		err = errors.New("Principal cannot be empty")
-		return err
+func isValidPrincipals(principal policy.User) (err error) {
+	if principal.AWS.IsEmpty() {
+		return errors.New("Principal cannot be empty")
 	}
-	if unsuppPrincipals := principals.Difference(set.CreateStringSet([]string{"*"}...)); !unsuppPrincipals.IsEmpty() {
+	if diff := principal.AWS.Difference(set.CreateStringSet("*")); !diff.IsEmpty() {
 		// Minio does not support or implement IAM, "*" is the only valid value.
-		// Amazon s3 doc on principals: http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements.html#Principal
-		err = fmt.Errorf("Unsupported principals found: ‘%#v’, please validate your policy document", unsuppPrincipals)
+		// Amazon s3 doc on principal:
+		// http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements.html#Principal
+		err = fmt.Errorf("Unsupported principals found: ‘%#v’, please validate your policy document",
+			diff)
 		return err
 	}
 	return nil
@@ -185,7 +121,7 @@ func isValidPrincipals(principal interface{}) (err error) {
 
 // isValidConditions - returns nil if the given conditions valid and
 // corresponding error otherwise.
-func isValidConditions(actions set.StringSet, conditions map[string]map[string]set.StringSet) (err error) {
+func isValidConditions(actions set.StringSet, conditions policy.ConditionMap) (err error) {
 	// Verify conditions should be valid. Validate if only
 	// supported condition keys are present and return error
 	// otherwise.
@@ -239,7 +175,7 @@ func resourcePrefix(resource string) string {
 // checkBucketPolicyResources validates Resources in unmarshalled bucket policy structure.
 // - Resources are validated against the given set of Actions.
 // -
-func checkBucketPolicyResources(bucket string, bucketPolicy *bucketPolicy) APIErrorCode {
+func checkBucketPolicyResources(bucket string, bucketPolicy policy.BucketAccessPolicy) APIErrorCode {
 	// Validate statements for special actions and collect resources
 	// for others to validate nesting.
 	var resourceMap = set.NewStringSet()
@@ -294,27 +230,27 @@ func checkBucketPolicyResources(bucket string, bucketPolicy *bucketPolicy) APIEr
 
 // parseBucketPolicy - parses and validates if bucket policy is of
 // proper JSON and follows allowed restrictions with policy standards.
-func parseBucketPolicy(bucketPolicyReader io.Reader, policy *bucketPolicy) (err error) {
+func parseBucketPolicy(bucketPolicyReader io.Reader, bktPolicy *policy.BucketAccessPolicy) (err error) {
 	// Parse bucket policy reader.
 	decoder := json.NewDecoder(bucketPolicyReader)
-	if err = decoder.Decode(&policy); err != nil {
+	if err = decoder.Decode(bktPolicy); err != nil {
 		return err
 	}
 
 	// Policy version cannot be empty.
-	if len(policy.Version) == 0 {
+	if len(bktPolicy.Version) == 0 {
 		err = errors.New("Policy version cannot be empty")
 		return err
 	}
 
 	// Policy statements cannot be empty.
-	if len(policy.Statements) == 0 {
+	if len(bktPolicy.Statements) == 0 {
 		err = errors.New("Policy statement cannot be empty")
 		return err
 	}
 
 	// Loop through all policy statements and validate entries.
-	for _, statement := range policy.Statements {
+	for _, statement := range bktPolicy.Statements {
 		// Statement effect should be valid.
 		if err := isValidEffect(statement.Effect); err != nil {
 			return err
@@ -339,19 +275,20 @@ func parseBucketPolicy(bucketPolicyReader io.Reader, policy *bucketPolicy) (err
 
 	// Separate deny and allow statements, so that we can apply deny
 	// statements in the beginning followed by Allow statements.
-	var denyStatements []policyStatement
-	var allowStatements []policyStatement
-	for _, statement := range policy.Statements {
+	var denyStatements []policy.Statement
+	var allowStatements []policy.Statement
+	for _, statement := range bktPolicy.Statements {
 		if statement.Effect == "Deny" {
 			denyStatements = append(denyStatements, statement)
 			continue
 		}
+
 		// else if statement.Effect == "Allow"
 		allowStatements = append(allowStatements, statement)
 	}
 
 	// Deny statements are enforced first once matched.
-	policy.Statements = append(denyStatements, allowStatements...)
+	bktPolicy.Statements = append(denyStatements, allowStatements...)
 
 	// Return successfully parsed policy structure.
 	return nil

cmd/bucket-policy-parser_test.go

@@ -20,6 +20,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"reflect"
 	"testing"
 
 	"github.com/minio/minio-go/pkg/policy"
@@ -74,11 +75,11 @@ var (
 )
 
 // Obtain bucket statement for read-write bucketPolicy.
-func getReadWriteObjectStatement(bucketName, objectPrefix string) policyStatement {
-	objectResourceStatement := policyStatement{}
+func getReadWriteObjectStatement(bucketName, objectPrefix string) policy.Statement {
+	objectResourceStatement := policy.Statement{}
 	objectResourceStatement.Effect = "Allow"
-	objectResourceStatement.Principal = map[string]interface{}{
-		"AWS": "*",
+	objectResourceStatement.Principal = policy.User{
+		AWS: set.StringSet{"*": struct{}{}},
 	}
 	objectResourceStatement.Resources = set.CreateStringSet([]string{fmt.Sprintf("%s%s", bucketARNPrefix, bucketName+"/"+objectPrefix+"*")}...)
 	objectResourceStatement.Actions = set.CreateStringSet(readWriteObjectActions...)
@@ -86,11 +87,11 @@ func getReadWriteObjectStatement(bucketName, objectPrefix string) policyStatemen
 }
 
 // Obtain object statement for read-write bucketPolicy.
-func getReadWriteBucketStatement(bucketName, objectPrefix string) policyStatement {
-	bucketResourceStatement := policyStatement{}
+func getReadWriteBucketStatement(bucketName, objectPrefix string) policy.Statement {
+	bucketResourceStatement := policy.Statement{}
 	bucketResourceStatement.Effect = "Allow"
-	bucketResourceStatement.Principal = map[string]interface{}{
-		"AWS": "*",
+	bucketResourceStatement.Principal = policy.User{
+		AWS: set.StringSet{"*": struct{}{}},
 	}
 	bucketResourceStatement.Resources = set.CreateStringSet([]string{fmt.Sprintf("%s%s", bucketARNPrefix, bucketName)}...)
 	bucketResourceStatement.Actions = set.CreateStringSet(readWriteBucketActions...)
@@ -98,19 +99,19 @@ func getReadWriteBucketStatement(bucketName, objectPrefix string) policyStatemen
 }
 
 // Obtain statements for read-write bucketPolicy.
-func getReadWriteStatement(bucketName, objectPrefix string) []policyStatement {
-	statements := []policyStatement{}
+func getReadWriteStatement(bucketName, objectPrefix string) []policy.Statement {
+	statements := []policy.Statement{}
 	// Save the read write policy.
 	statements = append(statements, getReadWriteBucketStatement(bucketName, objectPrefix), getReadWriteObjectStatement(bucketName, objectPrefix))
 	return statements
 }
 
 // Obtain bucket statement for read only bucketPolicy.
-func getReadOnlyBucketStatement(bucketName, objectPrefix string) policyStatement {
-	bucketResourceStatement := policyStatement{}
+func getReadOnlyBucketStatement(bucketName, objectPrefix string) policy.Statement {
+	bucketResourceStatement := policy.Statement{}
 	bucketResourceStatement.Effect = "Allow"
-	bucketResourceStatement.Principal = map[string]interface{}{
-		"AWS": "*",
+	bucketResourceStatement.Principal = policy.User{
+		AWS: set.StringSet{"*": struct{}{}},
 	}
 	bucketResourceStatement.Resources = set.CreateStringSet([]string{fmt.Sprintf("%s%s", bucketARNPrefix, bucketName)}...)
 	bucketResourceStatement.Actions = set.CreateStringSet(readOnlyBucketActions...)
@@ -118,11 +119,11 @@ func getReadOnlyBucketStatement(bucketName, objectPrefix string) policyStatement
 }
 
 // Obtain object statement for read only bucketPolicy.
-func getReadOnlyObjectStatement(bucketName, objectPrefix string) policyStatement {
-	objectResourceStatement := policyStatement{}
+func getReadOnlyObjectStatement(bucketName, objectPrefix string) policy.Statement {
+	objectResourceStatement := policy.Statement{}
 	objectResourceStatement.Effect = "Allow"
-	objectResourceStatement.Principal = map[string]interface{}{
-		"AWS": "*",
+	objectResourceStatement.Principal = policy.User{
+		AWS: set.StringSet{"*": struct{}{}},
 	}
 	objectResourceStatement.Resources = set.CreateStringSet([]string{fmt.Sprintf("%s%s", bucketARNPrefix, bucketName+"/"+objectPrefix+"*")}...)
 	objectResourceStatement.Actions = set.CreateStringSet(readOnlyObjectActions...)
@@ -130,20 +131,20 @@ func getReadOnlyObjectStatement(bucketName, objectPrefix string) policyStatement
 }
 
 // Obtain statements for read only bucketPolicy.
-func getReadOnlyStatement(bucketName, objectPrefix string) []policyStatement {
-	statements := []policyStatement{}
+func getReadOnlyStatement(bucketName, objectPrefix string) []policy.Statement {
+	statements := []policy.Statement{}
 	// Save the read only policy.
 	statements = append(statements, getReadOnlyBucketStatement(bucketName, objectPrefix), getReadOnlyObjectStatement(bucketName, objectPrefix))
 	return statements
 }
 
 // Obtain bucket statements for write only bucketPolicy.
-func getWriteOnlyBucketStatement(bucketName, objectPrefix string) policyStatement {
+func getWriteOnlyBucketStatement(bucketName, objectPrefix string) policy.Statement {
 
-	bucketResourceStatement := policyStatement{}
+	bucketResourceStatement := policy.Statement{}
 	bucketResourceStatement.Effect = "Allow"
-	bucketResourceStatement.Principal = map[string]interface{}{
-		"AWS": "*",
+	bucketResourceStatement.Principal = policy.User{
+		AWS: set.StringSet{"*": struct{}{}},
 	}
 	bucketResourceStatement.Resources = set.CreateStringSet([]string{fmt.Sprintf("%s%s", bucketARNPrefix, bucketName)}...)
 	bucketResourceStatement.Actions = set.CreateStringSet(writeOnlyBucketActions...)
@@ -151,11 +152,11 @@ func getWriteOnlyBucketStatement(bucketName, objectPrefix string) policyStatemen
 }
 
 // Obtain object statements for write only bucketPolicy.
-func getWriteOnlyObjectStatement(bucketName, objectPrefix string) policyStatement {
-	objectResourceStatement := policyStatement{}
+func getWriteOnlyObjectStatement(bucketName, objectPrefix string) policy.Statement {
+	objectResourceStatement := policy.Statement{}
 	objectResourceStatement.Effect = "Allow"
-	objectResourceStatement.Principal = map[string]interface{}{
-		"AWS": "*",
+	objectResourceStatement.Principal = policy.User{
+		AWS: set.StringSet{"*": struct{}{}},
 	}
 	objectResourceStatement.Resources = set.CreateStringSet([]string{fmt.Sprintf("%s%s", bucketARNPrefix, bucketName+"/"+objectPrefix+"*")}...)
 	objectResourceStatement.Actions = set.CreateStringSet(writeOnlyObjectActions...)
@@ -163,8 +164,8 @@ func getWriteOnlyObjectStatement(bucketName, objectPrefix string) policyStatemen
 }
 
 // Obtain statements for write only bucketPolicy.
-func getWriteOnlyStatement(bucketName, objectPrefix string) []policyStatement {
-	statements := []policyStatement{}
+func getWriteOnlyStatement(bucketName, objectPrefix string) []policy.Statement {
+	statements := []policy.Statement{}
 	// Write only policy.
 	// Save the write only policy.
 	statements = append(statements, getWriteOnlyBucketStatement(bucketName, objectPrefix), getWriteOnlyBucketStatement(bucketName, objectPrefix))
@@ -325,9 +326,10 @@ func TestIsValidPrincipals(t *testing.T) {
 		{[]string{"*"}, nil, true},
 	}
 	for i, testCase := range testCases {
-		err := isValidPrincipals(map[string]interface{}{
-			"AWS": testCase.principals,
-		})
+		u := policy.User{
+			AWS: set.CreateStringSet(testCase.principals...),
+		}
+		err := isValidPrincipals(u)
 		if err != nil && testCase.shouldPass {
 			t.Errorf("Test %d: Expected to pass, but failed with: <ERROR> %s", i+1, err.Error())
 		}
@@ -343,86 +345,86 @@ func TestIsValidPrincipals(t *testing.T) {
 	}
 }
 
-// getEmptyConditionKeyMap - returns a function that generates a
+// getEmptyConditionMap - returns a function that generates a
 // condition key map for a given key.
-func getEmptyConditionKeyMap(conditionKey string) func() map[string]map[string]set.StringSet {
-	emptyConditonGenerator := func() map[string]map[string]set.StringSet {
-		emptyMap := make(map[string]set.StringSet)
-		conditions := make(map[string]map[string]set.StringSet)
+func getEmptyConditionMap(conditionKey string) func() policy.ConditionMap {
+	emptyConditonGenerator := func() policy.ConditionMap {
+		emptyMap := make(policy.ConditionKeyMap)
+		conditions := make(policy.ConditionMap)
 		conditions[conditionKey] = emptyMap
 		return conditions
 	}
 	return emptyConditonGenerator
 }
 
-// Tests validate policyStatement condition validator.
+// Tests validate policy.Statement condition validator.
 func TestIsValidConditions(t *testing.T) {
 	// returns empty conditions map.
-	setEmptyConditions := func() map[string]map[string]set.StringSet {
-		return make(map[string]map[string]set.StringSet)
+	setEmptyConditions := func() policy.ConditionMap {
+		return make(policy.ConditionMap)
 	}
 
 	// returns map with the "StringEquals" set to empty map.
-	setEmptyStringEquals := getEmptyConditionKeyMap("StringEquals")
+	setEmptyStringEquals := getEmptyConditionMap("StringEquals")
 
 	// returns map with the "StringNotEquals" set to empty map.
-	setEmptyStringNotEquals := getEmptyConditionKeyMap("StringNotEquals")
+	setEmptyStringNotEquals := getEmptyConditionMap("StringNotEquals")
 
 	// returns map with the "StringLike" set to empty map.
-	setEmptyStringLike := getEmptyConditionKeyMap("StringLike")
+	setEmptyStringLike := getEmptyConditionMap("StringLike")
 
 	// returns map with the "StringNotLike" set to empty map.
-	setEmptyStringNotLike := getEmptyConditionKeyMap("StringNotLike")
+	setEmptyStringNotLike := getEmptyConditionMap("StringNotLike")
 
 	// returns map with the "IpAddress" set to empty map.
-	setEmptyIPAddress := getEmptyConditionKeyMap("IpAddress")
+	setEmptyIPAddress := getEmptyConditionMap("IpAddress")
 
 	// returns map with "NotIpAddress" set to empty map.
-	setEmptyNotIPAddress := getEmptyConditionKeyMap("NotIpAddress")
+	setEmptyNotIPAddress := getEmptyConditionMap("NotIpAddress")
 
 	// Generate conditions.
-	generateConditions := func(key1, key2, value string) map[string]map[string]set.StringSet {
-		innerMap := make(map[string]set.StringSet)
+	generateConditions := func(key1, key2, value string) policy.ConditionMap {
+		innerMap := make(policy.ConditionKeyMap)
 		innerMap[key2] = set.CreateStringSet(value)
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions[key1] = innerMap
 		return conditions
 	}
 
 	// generate ambigious conditions.
-	generateAmbigiousConditions := func() map[string]map[string]set.StringSet {
-		prefixMap := make(map[string]set.StringSet)
+	generateAmbigiousConditions := func() policy.ConditionMap {
+		prefixMap := make(policy.ConditionKeyMap)
 		prefixMap["s3:prefix"] = set.CreateStringSet("Asia/")
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions["StringEquals"] = prefixMap
 		conditions["StringNotEquals"] = prefixMap
 		return conditions
 	}
 
 	// generate valid and non valid type in the condition map.
-	generateValidInvalidConditions := func() map[string]map[string]set.StringSet {
-		innerMap := make(map[string]set.StringSet)
+	generateValidInvalidConditions := func() policy.ConditionMap {
+		innerMap := make(policy.ConditionKeyMap)
 		innerMap["s3:prefix"] = set.CreateStringSet("Asia/")
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions["StringEquals"] = innerMap
 		conditions["InvalidType"] = innerMap
 		return conditions
 	}
 
 	// generate valid and invalid keys for valid types in the same condition map.
-	generateValidInvalidConditionKeys := func() map[string]map[string]set.StringSet {
-		innerMapValid := make(map[string]set.StringSet)
+	generateValidInvalidConditionKeys := func() policy.ConditionMap {
+		innerMapValid := make(policy.ConditionKeyMap)
 		innerMapValid["s3:prefix"] = set.CreateStringSet("Asia/")
 		innerMapInValid := make(map[string]set.StringSet)
 		innerMapInValid["s3:invalid"] = set.CreateStringSet("Asia/")
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions["StringEquals"] = innerMapValid
 		conditions["StringEquals"] = innerMapInValid
 		return conditions
 	}
 
 	// List of Conditions used for test cases.
-	testConditions := []map[string]map[string]set.StringSet{
+	testConditions := []policy.ConditionMap{
 		generateConditions("StringValues", "s3:max-keys", "100"),
 		generateConditions("StringEquals", "s3:Object", "100"),
 		generateAmbigiousConditions(),
@@ -447,7 +449,7 @@ func TestIsValidConditions(t *testing.T) {
 		"please validate your policy document", "s3:max-keys", getObjectActionSet)
 	testCases := []struct {
 		inputActions   set.StringSet
-		inputCondition map[string]map[string]set.StringSet
+		inputCondition policy.ConditionMap
 		// expected result.
 		expectedErr error
 		// flag indicating whether test should pass.
@@ -518,26 +520,26 @@ func TestIsValidConditions(t *testing.T) {
 // Tests validate Policy Action and Resource fields.
 func TestCheckbucketPolicyResources(t *testing.T) {
 	// constructing policy statement without invalidPrefixActions (check bucket-policy-parser.go).
-	setValidPrefixActions := func(statements []policyStatement) []policyStatement {
+	setValidPrefixActions := func(statements []policy.Statement) []policy.Statement {
 		statements[0].Actions = set.CreateStringSet([]string{"s3:DeleteObject", "s3:PutObject"}...)
 		return statements
 	}
 	// contracting policy statement with recursive resources.
 	// should result in ErrMalformedPolicy
-	setRecurseResource := func(statements []policyStatement) []policyStatement {
+	setRecurseResource := func(statements []policy.Statement) []policy.Statement {
 		statements[0].Resources = set.CreateStringSet([]string{"arn:aws:s3:::minio-bucket/Asia/*", "arn:aws:s3:::minio-bucket/Asia/India/*"}...)
 		return statements
 	}
 
 	// constructing policy statement with lexically close characters.
 	// should not result in ErrMalformedPolicy
-	setResourceLexical := func(statements []policyStatement) []policyStatement {
+	setResourceLexical := func(statements []policy.Statement) []policy.Statement {
 		statements[0].Resources = set.CreateStringSet([]string{"arn:aws:s3:::minio-bucket/op*", "arn:aws:s3:::minio-bucket/oo*"}...)
 		return statements
 	}
 
 	// List of bucketPolicy used for tests.
-	bucketAccessPolicies := []bucketPolicy{
+	bucketAccessPolicies := []policy.BucketAccessPolicy{
 		// bucketPolicy - 1.
 		// Contains valid read only policy statement.
 		{Version: "1.0", Statements: getReadOnlyStatement("minio-bucket", "")},
@@ -568,7 +570,7 @@ func TestCheckbucketPolicyResources(t *testing.T) {
 	}
 
 	testCases := []struct {
-		inputPolicy bucketPolicy
+		inputPolicy policy.BucketAccessPolicy
 		// expected results.
 		apiErrCode APIErrorCode
 		// Flag indicating whether the test should pass.
@@ -599,7 +601,7 @@ func TestCheckbucketPolicyResources(t *testing.T) {
 		{bucketAccessPolicies[6], ErrNone, true},
 	}
 	for i, testCase := range testCases {
-		apiErrCode := checkBucketPolicyResources("minio-bucket", &testCase.inputPolicy)
+		apiErrCode := checkBucketPolicyResources("minio-bucket", testCase.inputPolicy)
 		if apiErrCode != ErrNone && testCase.shouldPass {
 			t.Errorf("Test %d: Expected to pass, but failed with Errocode %v", i+1, apiErrCode)
 		}
@@ -618,39 +620,39 @@ func TestCheckbucketPolicyResources(t *testing.T) {
 // Tests validate parsing of BucketAccessPolicy.
 func TestParseBucketPolicy(t *testing.T) {
 	// set Unsupported Actions.
-	setUnsupportedActions := func(statements []policyStatement) []policyStatement {
+	setUnsupportedActions := func(statements []policy.Statement) []policy.Statement {
 		// "s3:DeleteEverything"" is an Unsupported Action.
 		statements[0].Actions = set.CreateStringSet([]string{"s3:GetObject", "s3:ListBucket", "s3:PutObject", "s3:DeleteEverything"}...)
 		return statements
 	}
 	// set unsupported Effect.
-	setUnsupportedEffect := func(statements []policyStatement) []policyStatement {
+	setUnsupportedEffect := func(statements []policy.Statement) []policy.Statement {
 		// Effect "Don't allow" is Unsupported.
 		statements[0].Effect = "DontAllow"
 		return statements
 	}
 	// set unsupported principals.
-	setUnsupportedPrincipals := func(statements []policyStatement) []policyStatement {
+	setUnsupportedPrincipals := func(statements []policy.Statement) []policy.Statement {
 		// "User1111"" is an Unsupported Principal.
-		statements[0].Principal = map[string]interface{}{
-			"AWS": []string{"*", "User1111"},
+		statements[0].Principal = policy.User{
+			AWS: set.CreateStringSet([]string{"*", "User1111"}...),
 		}
 		return statements
 	}
 	// set unsupported Resources.
-	setUnsupportedResources := func(statements []policyStatement) []policyStatement {
+	setUnsupportedResources := func(statements []policy.Statement) []policy.Statement {
 		// "s3:DeleteEverything"" is an Unsupported Action.
 		statements[0].Resources = set.CreateStringSet([]string{"my-resource"}...)
 		return statements
 	}
 	// List of bucketPolicy used for test cases.
-	bucketAccesPolicies := []bucketPolicy{
+	bucketAccesPolicies := []policy.BucketAccessPolicy{
 		// bucketPolicy - 0.
 		// bucketPolicy statement empty.
 		{Version: "1.0"},
 		// bucketPolicy - 1.
 		// bucketPolicy version empty.
-		{Version: "", Statements: []policyStatement{}},
+		{Version: "", Statements: []policy.Statement{}},
 		// bucketPolicy - 2.
 		// Readonly bucketPolicy.
 		{Version: "1.0", Statements: getReadOnlyStatement("minio-bucket", "")},
@@ -675,19 +677,19 @@ func TestParseBucketPolicy(t *testing.T) {
 	}
 
 	testCases := []struct {
-		inputPolicy bucketPolicy
+		inputPolicy policy.BucketAccessPolicy
 		// expected results.
-		expectedPolicy bucketPolicy
+		expectedPolicy policy.BucketAccessPolicy
 		err            error
 		// Flag indicating whether the test should pass.
 		shouldPass bool
 	}{
 		// Test case - 1.
 		// bucketPolicy statement empty.
-		{bucketAccesPolicies[0], bucketPolicy{}, errors.New("Policy statement cannot be empty"), false},
+		{bucketAccesPolicies[0], policy.BucketAccessPolicy{}, errors.New("Policy statement cannot be empty"), false},
 		// Test case - 2.
 		// bucketPolicy version empty.
-		{bucketAccesPolicies[1], bucketPolicy{}, errors.New("Policy version cannot be empty"), false},
+		{bucketAccesPolicies[1], policy.BucketAccessPolicy{}, errors.New("Policy version cannot be empty"), false},
 		// Test case - 3.
 		// Readonly bucketPolicy.
 		{bucketAccesPolicies[2], bucketAccesPolicies[2], nil, true},
@@ -718,8 +720,8 @@ func TestParseBucketPolicy(t *testing.T) {
 			t.Fatalf("Test %d: Couldn't Marshal bucket policy %s", i+1, err)
 		}
 
-		var actualAccessPolicy = &bucketPolicy{}
-		err = parseBucketPolicy(&buffer, actualAccessPolicy)
+		var actualAccessPolicy = policy.BucketAccessPolicy{}
+		err = parseBucketPolicy(&buffer, &actualAccessPolicy)
 		if err != nil && testCase.shouldPass {
 			t.Errorf("Test %d: Expected to pass, but failed with: <ERROR> %s", i+1, err.Error())
 		}
@@ -734,7 +736,7 @@ func TestParseBucketPolicy(t *testing.T) {
 		}
 		// Test passes as expected, but the output values are verified for correctness here.
 		if err == nil && testCase.shouldPass {
-			if testCase.expectedPolicy.String() != actualAccessPolicy.String() {
+			if !reflect.DeepEqual(testCase.expectedPolicy, actualAccessPolicy) {
 				t.Errorf("Test %d: The expected statements from resource statement generator doesn't match the actual statements", i+1)
 			}
 		}
@@ -751,8 +753,8 @@ func TestAWSRefererCondition(t *testing.T) {
 		set.CreateStringSet("www.example.com",
 			"http://www.example.com"))
 
-	requestConditionKeyMap := make(map[string]set.StringSet)
-	requestConditionKeyMap["referer"] = set.CreateStringSet("www.example.com")
+	requestConditionMap := make(policy.ConditionKeyMap)
+	requestConditionMap["referer"] = set.CreateStringSet("www.example.com")
 
 	testCases := []struct {
 		effect       string
@@ -782,20 +784,20 @@ func TestAWSRefererCondition(t *testing.T) {
 	}
 
 	for i, test := range testCases {
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions[test.conditionKey] = conditionsKeyMap
 
-		allowStatement := policyStatement{
+		allowStatement := policy.Statement{
 			Sid:    "Testing AWS referer condition",
 			Effect: test.effect,
-			Principal: map[string]interface{}{
-				"AWS": "*",
+			Principal: policy.User{
+				AWS: set.CreateStringSet("*"),
 			},
 			Resources:  resource,
 			Conditions: conditions,
 		}
 
-		if result := bucketPolicyConditionMatch(requestConditionKeyMap, allowStatement); result != test.match {
+		if result := bucketPolicyConditionMatch(requestConditionMap, allowStatement); result != test.match {
 			t.Errorf("Test %d -  Expected conditons to evaluate to %v but got %v",
 				i+1, test.match, result)
 		}
@@ -813,8 +815,8 @@ func TestAWSSourceIPCondition(t *testing.T) {
 		set.CreateStringSet("54.240.143.0/24",
 			"2001:DB8:1234:5678::/64"))
 
-	requestConditionKeyMap := make(map[string]set.StringSet)
-	requestConditionKeyMap["ip"] = set.CreateStringSet("54.240.143.2")
+	requestConditionMap := make(policy.ConditionKeyMap)
+	requestConditionMap["ip"] = set.CreateStringSet("54.240.143.2")
 
 	testCases := []struct {
 		effect       string
@@ -844,20 +846,20 @@ func TestAWSSourceIPCondition(t *testing.T) {
 	}
 
 	for i, test := range testCases {
-		conditions := make(map[string]map[string]set.StringSet)
+		conditions := make(policy.ConditionMap)
 		conditions[test.conditionKey] = conditionsKeyMap
 
-		allowStatement := policyStatement{
+		allowStatement := policy.Statement{
 			Sid:    "Testing AWS referer condition",
 			Effect: test.effect,
-			Principal: map[string]interface{}{
-				"AWS": "*",
+			Principal: policy.User{
+				AWS: set.CreateStringSet("*"),
 			},
 			Resources:  resource,
 			Conditions: conditions,
 		}
 
-		if result := bucketPolicyConditionMatch(requestConditionKeyMap, allowStatement); result != test.match {
+		if result := bucketPolicyConditionMatch(requestConditionMap, allowStatement); result != test.match {
 			t.Errorf("Test %d -  Expected conditons to evaluate to %v but got %v",
 				i+1, test.match, result)
 		}

cmd/bucket-policy.go

@@ -20,8 +20,11 @@ import (
 	"bytes"
 	"encoding/json"
 	"io"
+	"reflect"
 	"sync"
 
+	"github.com/minio/minio-go/pkg/policy"
+	"github.com/minio/minio/pkg/errors"
 	"github.com/minio/minio/pkg/hash"
 )
 
@@ -34,30 +37,17 @@ const (
 	bucketPolicyConfig = "policy.json"
 )
 
-// Variable represents bucket policies in memory.
-var globalBucketPolicies *bucketPolicies
-
 // Global bucket policies list, policies are enforced on each bucket looking
 // through the policies here.
 type bucketPolicies struct {
 	rwMutex *sync.RWMutex
 
 	// Collection of 'bucket' policies.
-	bucketPolicyConfigs map[string]*bucketPolicy
-}
-
-// Represent a policy change
-type policyChange struct {
-	// isRemove is true if the policy change is to delete the
-	// policy on a bucket.
-	IsRemove bool
-
-	// represents the new policy for the bucket
-	BktPolicy *bucketPolicy
+	bucketPolicyConfigs map[string]policy.BucketAccessPolicy
 }
 
 // Fetch bucket policy for a given bucket.
-func (bp bucketPolicies) GetBucketPolicy(bucket string) *bucketPolicy {
+func (bp bucketPolicies) GetBucketPolicy(bucket string) policy.BucketAccessPolicy {
 	bp.rwMutex.RLock()
 	defer bp.rwMutex.RUnlock()
 	return bp.bucketPolicyConfigs[bucket]
@@ -65,80 +55,61 @@ func (bp bucketPolicies) GetBucketPolicy(bucket string) *bucketPolicy {
 
 // Set a new bucket policy for a bucket, this operation will overwrite
 // any previous bucket policies for the bucket.
-func (bp *bucketPolicies) SetBucketPolicy(bucket string, pCh policyChange) error {
+func (bp *bucketPolicies) SetBucketPolicy(bucket string, newpolicy policy.BucketAccessPolicy) error {
 	bp.rwMutex.Lock()
 	defer bp.rwMutex.Unlock()
 
-	if pCh.IsRemove {
-		delete(bp.bucketPolicyConfigs, bucket)
-	} else {
-		if pCh.BktPolicy == nil {
-			return errInvalidArgument
-		}
-		bp.bucketPolicyConfigs[bucket] = pCh.BktPolicy
+	if reflect.DeepEqual(newpolicy, emptyBucketPolicy) {
+		return errInvalidArgument
 	}
+	bp.bucketPolicyConfigs[bucket] = newpolicy
+
 	return nil
 }
 
-// Loads all bucket policies from persistent layer.
-func loadAllBucketPolicies(objAPI ObjectLayer) (policies map[string]*bucketPolicy, err error) {
-	// List buckets to proceed loading all notification configuration.
-	buckets, err := objAPI.ListBuckets()
-	errorIf(err, "Unable to list buckets.")
-	if err != nil {
-		return nil, errorCause(err)
+// Delete bucket policy from struct for a given bucket.
+func (bp *bucketPolicies) DeleteBucketPolicy(bucket string) error {
+	bp.rwMutex.Lock()
+	defer bp.rwMutex.Unlock()
+	delete(bp.bucketPolicyConfigs, bucket)
+	return nil
+}
+
+// Intialize all bucket policies.
+func initBucketPolicies(objAPI ObjectLayer) (*bucketPolicies, error) {
+	if objAPI == nil {
+		return nil, errInvalidArgument
 	}
 
-	policies = make(map[string]*bucketPolicy)
-	var pErrs []error
+	// List buckets to proceed loading all notification configuration.
+	buckets, err := objAPI.ListBuckets()
+	if err != nil {
+		return nil, errors.Cause(err)
+	}
+
+	policies := make(map[string]policy.BucketAccessPolicy)
 	// Loads bucket policy.
 	for _, bucket := range buckets {
-		policy, pErr := readBucketPolicy(bucket.Name, objAPI)
+		bp, pErr := ReadBucketPolicy(bucket.Name, objAPI)
 		if pErr != nil {
 			// net.Dial fails for rpc client or any
 			// other unexpected errors during net.Dial.
-			if !isErrIgnored(pErr, errDiskNotFound) {
+			if !errors.IsErrIgnored(pErr, errDiskNotFound) {
 				if !isErrBucketPolicyNotFound(pErr) {
-					pErrs = append(pErrs, pErr)
+					return nil, errors.Cause(pErr)
 				}
 			}
 			// Continue to load other bucket policies if possible.
 			continue
 		}
-		policies[bucket.Name] = policy
+		policies[bucket.Name] = bp
 	}
 
-	// Look for any errors occurred while reading bucket policies.
-	for _, pErr := range pErrs {
-		if pErr != nil {
-			return policies, pErr
-		}
-	}
-
-	// Success.
-	return policies, nil
-}
-
-// Intialize all bucket policies.
-func initBucketPolicies(objAPI ObjectLayer) error {
-	if objAPI == nil {
-		return errInvalidArgument
-	}
-
-	// Read all bucket policies.
-	policies, err := loadAllBucketPolicies(objAPI)
-	if err != nil {
-		return err
-	}
-
-	// Populate global bucket collection.
-	globalBucketPolicies = &bucketPolicies{
+	// Return all bucket policies.
+	return &bucketPolicies{
 		rwMutex:             &sync.RWMutex{},
 		bucketPolicyConfigs: policies,
-	}
-
-	// Success.
-	return nil
+	}, nil
 }
 
 // readBucketPolicyJSON - reads bucket policy for an input bucket, returns BucketPolicyNotFound
@@ -146,58 +117,44 @@ func initBucketPolicies(objAPI ObjectLayer) error {
 func readBucketPolicyJSON(bucket string, objAPI ObjectLayer) (bucketPolicyReader io.Reader, err error) {
 	policyPath := pathJoin(bucketConfigPrefix, bucket, bucketPolicyConfig)
 
-	// Acquire a read lock on policy config before reading.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, policyPath)
-	if err = objLock.GetRLock(globalOperationTimeout); err != nil {
-		return nil, err
-	}
-	defer objLock.RUnlock()
-
 	var buffer bytes.Buffer
-	err = objAPI.GetObject(minioMetaBucket, policyPath, 0, -1, &buffer)
+	err = objAPI.GetObject(minioMetaBucket, policyPath, 0, -1, &buffer, "")
 	if err != nil {
 		if isErrObjectNotFound(err) || isErrIncompleteBody(err) {
-			return nil, BucketPolicyNotFound{Bucket: bucket}
+			return nil, PolicyNotFound{Bucket: bucket}
 		}
 		errorIf(err, "Unable to load policy for the bucket %s.", bucket)
-		return nil, errorCause(err)
+		return nil, errors.Cause(err)
 	}
 
 	return &buffer, nil
 }
 
-// readBucketPolicy - reads bucket policy for an input bucket, returns BucketPolicyNotFound
+// ReadBucketPolicy - reads bucket policy for an input bucket, returns BucketPolicyNotFound
 // if bucket policy is not found. This function also parses the bucket policy into an object.
-func readBucketPolicy(bucket string, objAPI ObjectLayer) (*bucketPolicy, error) {
+func ReadBucketPolicy(bucket string, objAPI ObjectLayer) (policy.BucketAccessPolicy, error) {
 	// Read bucket policy JSON.
 	bucketPolicyReader, err := readBucketPolicyJSON(bucket, objAPI)
 	if err != nil {
-		return nil, err
+		return emptyBucketPolicy, err
 	}
 
 	// Parse the saved policy.
-	var policy = &bucketPolicy{}
-	err = parseBucketPolicy(bucketPolicyReader, policy)
-	if err != nil {
-		return nil, err
+	var bp policy.BucketAccessPolicy
+	if err = parseBucketPolicy(bucketPolicyReader, &bp); err != nil {
+		return emptyBucketPolicy, err
 
 	}
-	return policy, nil
+	return bp, nil
 }
 
 // removeBucketPolicy - removes any previously written bucket policy. Returns BucketPolicyNotFound
 // if no policies are found.
 func removeBucketPolicy(bucket string, objAPI ObjectLayer) error {
 	policyPath := pathJoin(bucketConfigPrefix, bucket, bucketPolicyConfig)
-	// Acquire a write lock on policy config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, policyPath)
-	if err := objLock.GetLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	defer objLock.Unlock()
-	if err := objAPI.DeleteObject(minioMetaBucket, policyPath); err != nil {
-		errorIf(err, "Unable to remove bucket-policy on bucket %s.", bucket)
-		err = errorCause(err)
+	err := objAPI.DeleteObject(minioMetaBucket, policyPath)
+	if err != nil {
+		err = errors.Cause(err)
 		if _, ok := err.(ObjectNotFound); ok {
 			return BucketPolicyNotFound{Bucket: bucket}
 		}
@@ -207,88 +164,45 @@ func removeBucketPolicy(bucket string, objAPI ObjectLayer) error {
 }
 
 // writeBucketPolicy - save a bucket policy that is assumed to be validated.
-func writeBucketPolicy(bucket string, objAPI ObjectLayer, bpy *bucketPolicy) error {
+func writeBucketPolicy(bucket string, objAPI ObjectLayer, bpy policy.BucketAccessPolicy) error {
 	buf, err := json.Marshal(bpy)
 	if err != nil {
-		errorIf(err, "Unable to marshal bucket policy '%v' to JSON", *bpy)
+		errorIf(err, "Unable to marshal bucket policy '%#v' to JSON", bpy)
 		return err
 	}
 	policyPath := pathJoin(bucketConfigPrefix, bucket, bucketPolicyConfig)
-	// Acquire a write lock on policy config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, policyPath)
-	if err = objLock.GetLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	defer objLock.Unlock()
-
 	hashReader, err := hash.NewReader(bytes.NewReader(buf), int64(len(buf)), "", getSHA256Hash(buf))
 	if err != nil {
 		errorIf(err, "Unable to set policy for the bucket %s", bucket)
-		return errorCause(err)
+		return errors.Cause(err)
 	}
 
 	if _, err = objAPI.PutObject(minioMetaBucket, policyPath, hashReader, nil); err != nil {
 		errorIf(err, "Unable to set policy for the bucket %s", bucket)
-		return errorCause(err)
+		return errors.Cause(err)
 	}
 	return nil
 }
 
-func parseAndPersistBucketPolicy(bucket string, policyBytes []byte, objAPI ObjectLayer) APIErrorCode {
-	// Parse bucket policy.
-	var policy = &bucketPolicy{}
-	err := parseBucketPolicy(bytes.NewReader(policyBytes), policy)
-	if err != nil {
-		errorIf(err, "Unable to parse bucket policy.")
-		return ErrInvalidPolicyDocument
-	}
-
-	// Parse check bucket policy.
-	if s3Error := checkBucketPolicyResources(bucket, policy); s3Error != ErrNone {
-		return s3Error
-	}
-
-	// Acquire a write lock on bucket before modifying its configuration.
-	bucketLock := globalNSMutex.NewNSLock(bucket, "")
-	if bucketLock.GetLock(globalOperationTimeout) != nil {
-		return ErrOperationTimedOut
-	}
-	// Release lock after notifying peers
-	defer bucketLock.Unlock()
-
-	// Save bucket policy.
-	if err = persistAndNotifyBucketPolicyChange(bucket, policyChange{false, policy}, objAPI); err != nil {
-		switch err.(type) {
-		case BucketNameInvalid:
-			return ErrInvalidBucketName
-		case BucketNotFound:
-			return ErrNoSuchBucket
-		default:
-			errorIf(err, "Unable to save bucket policy.")
-			return ErrInternalError
-		}
-	}
-	return ErrNone
-}
-
 // persistAndNotifyBucketPolicyChange - takes a policyChange argument,
 // persists it to storage, and notify nodes in the cluster about the
 // change. In-memory state is updated in response to the notification.
-func persistAndNotifyBucketPolicyChange(bucket string, pCh policyChange, objAPI ObjectLayer) error {
-	if pCh.IsRemove {
-		if err := removeBucketPolicy(bucket, objAPI); err != nil {
+func persistAndNotifyBucketPolicyChange(bucket string, isRemove bool, bktPolicy policy.BucketAccessPolicy, objAPI ObjectLayer) error {
+	if isRemove {
+		err := removeBucketPolicy(bucket, objAPI)
+		if err != nil {
 			return err
 		}
 	} else {
-		if pCh.BktPolicy == nil {
+		if reflect.DeepEqual(bktPolicy, emptyBucketPolicy) {
 			return errInvalidArgument
 		}
-		if err := writeBucketPolicy(bucket, objAPI, pCh.BktPolicy); err != nil {
+		if err := writeBucketPolicy(bucket, objAPI, bktPolicy); err != nil {
 			return err
 		}
 	}
 
 	// Notify all peers (including self) to update in-memory state
-	S3PeersUpdateBucketPolicy(bucket, pCh)
+	S3PeersUpdateBucketPolicy(bucket)
 	return nil
 }

cmd/build-constants.go

@@ -16,11 +16,13 @@
 
 package cmd
 
+import "go/build"
+
 // DO NOT EDIT THIS FILE DIRECTLY. These are build-time constants
 // set through ‘buildscripts/gen-ldflags.go’.
 var (
 	// GOPATH - GOPATH value at the time of build.
-	GOPATH = ""
+	GOPATH = build.Default.GOPATH
 
 	// Go get development tag.
 	goGetTag = "DEVELOPMENT.GOGET"

cmd/certs.go

@@ -22,9 +22,14 @@ import (
 	"encoding/pem"
 	"fmt"
 	"io/ioutil"
-	"path/filepath"
+	"os"
 )
 
+// TLSPrivateKeyPassword is the environment variable which contains the password used
+// to decrypt the TLS private key. It must be set if the TLS private key is
+// password protected.
+const TLSPrivateKeyPassword = "MINIO_CERT_PASSWD"
+
 func parsePublicCertFile(certFile string) (x509Certs []*x509.Certificate, err error) {
 	// Read certificate file.
 	var data []byte
@@ -58,14 +63,18 @@ func parsePublicCertFile(certFile string) (x509Certs []*x509.Certificate, err er
 func getRootCAs(certsCAsDir string) (*x509.CertPool, error) {
 	// Get all CA file names.
 	var caFiles []string
-	fis, err := ioutil.ReadDir(certsCAsDir)
+	fis, err := readDir(certsCAsDir)
 	if err != nil {
 		return nil, err
 	}
 	for _, fi := range fis {
-		caFiles = append(caFiles, filepath.Join(certsCAsDir, fi.Name()))
+		// Skip all directories.
+		if hasSuffix(fi, slashSeparator) {
+			continue
+		}
+		// We are only interested in regular files here.
+		caFiles = append(caFiles, pathJoin(certsCAsDir, fi))
 	}
-
 	if len(caFiles) == 0 {
 		return nil, nil
 	}
@@ -90,6 +99,36 @@ func getRootCAs(certsCAsDir string) (*x509.CertPool, error) {
 	return rootCAs, nil
 }
 
+// load an X509 key pair (private key , certificate) from the provided
+// paths. The private key may be encrypted and is decrypted using the
+// ENV_VAR: MINIO_CERT_PASSWD.
+func loadX509KeyPair(certFile, keyFile string) (tls.Certificate, error) {
+	certPEMBlock, err := ioutil.ReadFile(certFile)
+	if err != nil {
+		return tls.Certificate{}, fmt.Errorf("TLS: failed to read cert file: %v", err)
+	}
+	keyPEMBlock, err := ioutil.ReadFile(keyFile)
+	if err != nil {
+		return tls.Certificate{}, fmt.Errorf("TLS: failed to read private key: %v", err)
+	}
+	key, rest := pem.Decode(keyPEMBlock)
+	if len(rest) > 0 {
+		return tls.Certificate{}, fmt.Errorf("TLS: private key contains additional data")
+	}
+	if x509.IsEncryptedPEMBlock(key) {
+		password, ok := os.LookupEnv(TLSPrivateKeyPassword)
+		if !ok {
+			return tls.Certificate{}, fmt.Errorf("TLS: private key is encrypted but no password is present - set env var: %s", TLSPrivateKeyPassword)
+		}
+		decryptedKey, decErr := x509.DecryptPEMBlock(key, []byte(password))
+		if decErr != nil {
+			return tls.Certificate{}, fmt.Errorf("TLS: failed to decrypt private key: %v", decErr)
+		}
+		keyPEMBlock = pem.EncodeToMemory(&pem.Block{Type: key.Type, Bytes: decryptedKey})
+	}
+	return tls.X509KeyPair(certPEMBlock, keyPEMBlock)
+}
+
 func getSSLConfig() (x509Certs []*x509.Certificate, rootCAs *x509.CertPool, tlsCert *tls.Certificate, secureConn bool, err error) {
 	if !(isFile(getPublicCertFile()) && isFile(getPrivateKeyFile())) {
 		return nil, nil, nil, false, nil
@@ -100,7 +139,7 @@ func getSSLConfig() (x509Certs []*x509.Certificate, rootCAs *x509.CertPool, tlsC
 	}
 
 	var cert tls.Certificate
-	if cert, err = tls.LoadX509KeyPair(getPublicCertFile(), getPrivateKeyFile()); err != nil {
+	if cert, err = loadX509KeyPair(getPublicCertFile(), getPrivateKeyFile()); err != nil {
 		return nil, nil, nil, false, err
 	}
 

cmd/certs_test.go

@@ -219,27 +219,16 @@ func TestGetRootCAs(t *testing.T) {
 		t.Fatalf("Unable create test file. %v", err)
 	}
 
-	nonexistentErr := fmt.Errorf("open nonexistent-dir: no such file or directory")
-	if runtime.GOOS == "windows" {
-		// Below concatenation is done to get rid of goline error
-		// "error strings should not be capitalized or end with punctuation or a newline"
-		nonexistentErr = fmt.Errorf("open nonexistent-dir:" + " The system cannot find the file specified.")
-	}
-
-	err1 := fmt.Errorf("read %s: is a directory", filepath.Join(dir1, "empty-dir"))
-	if runtime.GOOS == "windows" {
-		// Below concatenation is done to get rid of goline error
-		// "error strings should not be capitalized or end with punctuation or a newline"
-		err1 = fmt.Errorf("read %s:"+" The handle is invalid.", filepath.Join(dir1, "empty-dir"))
-	}
-
 	testCases := []struct {
 		certCAsDir  string
 		expectedErr error
 	}{
-		{"nonexistent-dir", nonexistentErr},
-		{dir1, err1},
+		{"nonexistent-dir", errFileNotFound},
+		// Ignores directories.
+		{dir1, nil},
+		// Ignore empty directory.
 		{emptydir, nil},
+		// Loads the cert properly.
 		{dir2, nil},
 	}
 
@@ -257,3 +246,252 @@ func TestGetRootCAs(t *testing.T) {
 		}
 	}
 }
+
+func TestLoadX509KeyPair(t *testing.T) {
+	for i, testCase := range loadX509KeyPairTests {
+		privateKey, err := createTempFile("private.key", testCase.privateKey)
+		if err != nil {
+			t.Fatalf("Test %d: failed to create tmp private key file: %v", i, err)
+		}
+		certificate, err := createTempFile("public.crt", testCase.certificate)
+		if err != nil {
+			os.Remove(privateKey)
+			t.Fatalf("Test %d: failed to create tmp certificate file: %v", i, err)
+		}
+
+		os.Unsetenv(TLSPrivateKeyPassword)
+		if testCase.password != "" {
+			os.Setenv(TLSPrivateKeyPassword, testCase.password)
+		}
+		_, err = loadX509KeyPair(certificate, privateKey)
+		if err != nil && !testCase.shouldFail {
+			t.Errorf("Test %d: test should succeed but it failed: %v", i, err)
+		}
+		if err == nil && testCase.shouldFail {
+			t.Errorf("Test %d: test should fail but it succeed", i)
+		}
+		os.Remove(privateKey)
+		os.Remove(certificate)
+	}
+}
+
+var loadX509KeyPairTests = []struct {
+	password                string
+	privateKey, certificate string
+	shouldFail              bool
+}{
+	{
+		password: "foobar",
+		privateKey: `-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: AES-128-CBC,CC483BF11678C35F9F02A1AD85DAE285
+
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+aRW9BRoNZ0czKx7Lhuwjreyb5IcWDarhC8q29ZkkWsQQonaPb0kTEFJul80Yqk0k
+-----END RSA PRIVATE KEY-----`,
+		certificate: `-----BEGIN CERTIFICATE-----
+MIIDiTCCAnGgAwIBAgIJAK5m5S7EE46kMA0GCSqGSIb3DQEBCwUAMFsxCzAJBgNV
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+-----END CERTIFICATE-----`,
+		shouldFail: false,
+	},
+	{
+		password: "password",
+		privateKey: `-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: AES-128-CBC,CC483BF11678C35F9F02A1AD85DAE285
+
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+aRW9BRoNZ0czKx7Lhuwjreyb5IcWDarhC8q29ZkkWsQQonaPb0kTEFJul80Yqk0k
+-----END RSA PRIVATE KEY-----`,
+		certificate: `-----BEGIN CERTIFICATE-----
+MIIDiTCCAnGgAwIBAgIJAK5m5S7EE46kMA0GCSqGSIb3DQEBCwUAMFsxCzAJBgNV
+BAYTAlVTMQ4wDAYDVQQIDAVzdGF0ZTERMA8GA1UEBwwIbG9jYXRpb24xFTATBgNV
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+kQyKGUTpDbKLuyYMFsoH73YLjBqNe+UEhPwE+FWpcky1Sp9RTx/oMLpiZaPR
+-----END CERTIFICATE-----`,
+		shouldFail: true,
+	},
+	{
+		password: "",
+		privateKey: `-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEA4K9Qq7vMY2bGkrdFAYpBYNLlCgnnFU+0pi+N+3bjuWmfX/kw
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+yZpYRXUXhdv/FXCjtXvAhKIX5+e+3dlzPHIdekSfcY00ip/ifAS1OyVviJia+cna
+eJgq8WLHxJZim9Ah93NlPyiqGPwtasub90qjZbkCgYEA35WK02o1wII3dvCNc7bM
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+ny6DDYXyjlhO9WFogHYhwP636+mHJl8+PAsfDvqk0VRJZDmpdUDIv7DrSQGpRfRX
+8f+2K4oIOlhv9RuRpI4wHwUCgYB8OjaMyn1NEsy4k2qBt4U+jhcdyEv1pbWqi/U1
+qYm5FTgd44VvWVDHBGdQoMv9h28iFCJpzrU2Txv8B4y7v9Ujg+ZLIAFL7j0szt5K
+wTZpWvO9Q0Qb98Q2VgL2lADRiyIlglrMJnoRfiisNfOfGKE6e+eGsxI5qUxmN5e5
+JQvoiQKBgQCqgyuUBIu/Qsb3qUED/o0S5wCel43Yh/Rl+mxDinOUvJfKJSW2SyEk
++jDo0xw3Opg6ZC5Lj2V809LA/XteaIuyhRuqOopjhHIvIvrYGe+2O8q9/Mv40BYW
+0BhJ/Gdseps0C6Z5mTT5Fee4YVlGZuyuNKmKTd4JmqInfBV3ncMWQg==
+-----END RSA PRIVATE KEY-----`,
+		certificate: `-----BEGIN CERTIFICATE-----
+MIIDiTCCAnGgAwIBAgIJAIb84Z5Mh31iMA0GCSqGSIb3DQEBCwUAMFsxCzAJBgNV
+BAYTAlVTMQ4wDAYDVQQIDAVzdGF0ZTERMA8GA1UEBwwIbG9jYXRpb24xFTATBgNV
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+ZbPC8FIs8IJRXYi5R3u0FrWknbBeR2gN4jkidgckqtdtJmieeLoF7HuyCepX/2jz
+EWRI6V6hBZmDJ4obG23Qn9n7OGkf7NdqHAzjA4vfLMtJC340Iozo33rNdiLXoMRr
+z19jBHE/ATVdNFzsN2CCrH7iJEe9gbR/JM1w8H/5SIXDn0QTVKBAjJNWe1Wqmxvq
+zxd2QXFRGgvF5+FwxV/aRTRPTg5YjeCZ5q8p9NyPxnb9uM9Kyo+aCQAO/1G7pWdI
+r/3pNb83DFYnfY8HPpJuX0t3AgMBAAGjUDBOMB0GA1UdDgQWBBQ2/bSCHscnoV+0
+d+YJxLu4XLSNIDAfBgNVHSMEGDAWgBQ2/bSCHscnoV+0d+YJxLu4XLSNIDAMBgNV
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+Q59oe79ZK1RqDE6ZZu0rgw07rPzKr4ofW4hTxnx7PUgKOhWLq9VvwEC/9tDbD0Gw
+SKknRZZOiEE3qUZbwNtHMd4UBzpzChTRC6RcwC5zT1/WICMUHxa4b8E2umJuf3Qd
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+OncDtuIpK8O7OyfHP3+MBpUFG4P6Ctn7RVcZe9fQweTpfAy18G+loVzuUeOD
+-----END CERTIFICATE-----`,
+		shouldFail: false,
+	},
+	{
+		password: "foobar",
+		privateKey: `-----BEGIN RSA PRIVATE KEY-----
+MIIEpAIBAAKCAQEA4K9Qq7vMY2bGkrdFAYpBYNLlCgnnFU+0pi+N+3bjuWmfX/kw
+WXBa3SDqKD08PWWzwvBSLPCCUV2IuUd7tBa1pJ2wXkdoDeI5InYHJKrXbSZonni6
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+M+3CoAglEdmXoF1uM/TdPUXKcbqoU3ymeXAGjYhOov3CMp/n0z0xqvLnMLPxmx+i
+ny6DDYXyjlhO9WFogHYhwP636+mHJl8+PAsfDvqk0VRJZDmpdUDIv7DrSQGpRfRX
+8f+2K4oIOlhv9RuRpI4wHwUCgYB8OjaMyn1NEsy4k2qBt4U+jhcdyEv1pbWqi/U1
+qYm5FTgd44VvWVDHBGdQoMv9h28iFCJpzrU2Txv8B4y7v9Ujg+ZLIAFL7j0szt5K
+wTZpWvO9Q0Qb98Q2VgL2lADRiyIlglrMJnoRfiisNfOfGKE6e+eGsxI5qUxmN5e5
+JQvoiQKBgQCqgyuUBIu/Qsb3qUED/o0S5wCel43Yh/Rl+mxDinOUvJfKJSW2SyEk
++jDo0xw3Opg6ZC5Lj2V809LA/XteaIuyhRuqOopjhHIvIvrYGe+2O8q9/Mv40BYW
+0BhJ/Gdseps0C6Z5mTT5Fee4YVlGZuyuNKmKTd4JmqInfBV3ncMWQg==
+-----END RSA PRIVATE KEY-----`,
+		certificate: `-----BEGIN CERTIFICATE-----
+MIIDiTCCAnGgAwIBAgIJAIb84Z5Mh31iMA0GCSqGSIb3DQEBCwUAMFsxCzAJBgNV
+BAYTAlVTMQ4wDAYDVQQIDAVzdGF0ZTERMA8GA1UEBwwIbG9jYXRpb24xFTATBgNV
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+d+YJxLu4XLSNIDAfBgNVHSMEGDAWgBQ2/bSCHscnoV+0d+YJxLu4XLSNIDAMBgNV
+HRMEBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQC6p4gPwmkoDtRsP1c8IWgXFka+
+Q59oe79ZK1RqDE6ZZu0rgw07rPzKr4ofW4hTxnx7PUgKOhWLq9VvwEC/9tDbD0Gw
+SKknRZZOiEE3qUZbwNtHMd4UBzpzChTRC6RcwC5zT1/WICMUHxa4b8E2umJuf3Qd
+5Y23sXEESx5evr49z6DLcVe2i70o2wJeWs2kaXqhCJt0X7z0rnYqjfFdvxd8dyzt
+1DXmE45cLadpWHDg26DMsdchamgnqEo79YUxkH6G/Cb8ZX4igQ/CsxCDOKvccjHO
+OncDtuIpK8O7OyfHP3+MBpUFG4P6Ctn7RVcZe9fQweTpfAy18G+loVzuUeOD
+-----END CERTIFICATE-----`,
+		shouldFail: false,
+	},
+}

cmd/common-main.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2017 Minio, Inc.
+ * Minio Cloud Storage, (C) 2017, 2018 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,39 +24,26 @@ import (
 	"time"
 
 	"github.com/minio/cli"
+	"github.com/minio/minio/pkg/auth"
 )
 
 // Check for updates and print a notification message
 func checkUpdate(mode string) {
-	// Its OK to ignore any errors during getUpdateInfo() here.
-	if older, downloadURL, err := getUpdateInfo(1*time.Second, mode); err == nil {
-		if updateMsg := computeUpdateMessage(downloadURL, older); updateMsg != "" {
+	// Its OK to ignore any errors during doUpdate() here.
+	if updateMsg, _, currentReleaseTime, latestReleaseTime, err := getUpdateInfo(2*time.Second, mode); err == nil {
+		if globalInplaceUpdateDisabled {
 			log.Println(updateMsg)
+		} else {
+			log.Println(prepareUpdateMessage("Run `minio update`", latestReleaseTime.Sub(currentReleaseTime)))
 		}
 	}
 }
 
-func enableLoggers() {
-	fileLogTarget := serverConfig.Logger.GetFile()
-	if fileLogTarget.Enable {
-		err := InitFileLogger(&fileLogTarget)
-		fatalIf(err, "Unable to initialize file logger")
-		log.AddTarget(fileLogTarget)
-	}
-
-	consoleLogTarget := serverConfig.Logger.GetConsole()
-	if consoleLogTarget.Enable {
-		InitConsoleLogger(&consoleLogTarget)
-	}
-
-	log.SetConsoleTarget(consoleLogTarget)
-}
-
 func initConfig() {
 	// Config file does not exist, we create it fresh and return upon success.
 	if isFile(getConfigFile()) {
 		fatalIf(migrateConfig(), "Config migration failed.")
-		fatalIf(loadConfig(), "Unable to load config version: '%s'.", v19)
+		fatalIf(loadConfig(), "Unable to load config version: '%s'.", serverConfigVersion)
 	} else {
 		fatalIf(newConfig(), "Unable to initialize minio config for the first time.")
 		log.Println("Created minio configuration file successfully at " + getConfigDir())
@@ -64,23 +51,36 @@ func initConfig() {
 }
 
 func handleCommonCmdArgs(ctx *cli.Context) {
-	// Set configuration directory.
-	{
-		// Get configuration directory from command line argument.
-		configDir := ctx.String("config-dir")
-		if !ctx.IsSet("config-dir") && ctx.GlobalIsSet("config-dir") {
-			configDir = ctx.GlobalString("config-dir")
+
+	var configDir string
+
+	if ctx.IsSet("config-dir") {
+		configDir = ctx.String("config-dir")
+	} else if ctx.GlobalIsSet("config-dir") {
+		configDir = ctx.GlobalString("config-dir")
+		// cli package does not expose parent's "config-dir" option.  Below code is workaround.
+		if configDir == "" || configDir == getConfigDir() {
+			if ctx.Parent().GlobalIsSet("config-dir") {
+				configDir = ctx.Parent().GlobalString("config-dir")
+			}
 		}
+	} else {
+		// Neither local nor global config-dir option is provided.  In this case, try to use
+		// default config directory.
+		configDir = getConfigDir()
 		if configDir == "" {
-			fatalIf(errors.New("empty directory"), "Configuration directory cannot be empty.")
+			fatalIf(errors.New("missing option"), "config-dir option must be provided.")
 		}
-
-		// Disallow relative paths, figure out absolute paths.
-		configDirAbs, err := filepath.Abs(configDir)
-		fatalIf(err, "Unable to fetch absolute path for config directory %s", configDir)
-
-		setConfigDir(configDirAbs)
 	}
+
+	if configDir == "" {
+		fatalIf(errors.New("empty directory"), "Configuration directory cannot be empty.")
+	}
+
+	// Disallow relative paths, figure out absolute paths.
+	configDirAbs, err := filepath.Abs(configDir)
+	fatalIf(err, "Unable to fetch absolute path for config directory %s", configDir)
+	setConfigDir(configDirAbs)
 }
 
 func handleCommonEnvVars() {
@@ -89,13 +89,10 @@ func handleCommonEnvVars() {
 		globalProfiler = startProfiler(profiler)
 	}
 
-	// Check if object cache is disabled.
-	globalXLObjCacheDisabled = strings.EqualFold(os.Getenv("_MINIO_CACHE"), "off")
-
 	accessKey := os.Getenv("MINIO_ACCESS_KEY")
 	secretKey := os.Getenv("MINIO_SECRET_KEY")
 	if accessKey != "" && secretKey != "" {
-		cred, err := createCredential(accessKey, secretKey)
+		cred, err := auth.CreateCredentials(accessKey, secretKey)
 		fatalIf(err, "Invalid access/secret Key set in environment.")
 
 		// credential Envs are set globally.
@@ -115,5 +112,50 @@ func handleCommonEnvVars() {
 		globalIsBrowserEnabled = bool(browserFlag)
 	}
 
-	globalHTTPTrace = os.Getenv("MINIO_HTTP_TRACE") != ""
+	traceFile := os.Getenv("MINIO_HTTP_TRACE")
+	if traceFile != "" {
+		var err error
+		globalHTTPTraceFile, err = os.OpenFile(traceFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0660)
+		fatalIf(err, "error opening file %s", traceFile)
+	}
+
+	globalDomainName = os.Getenv("MINIO_DOMAIN")
+	if globalDomainName != "" {
+		globalIsEnvDomainName = true
+	}
+
+	// In place update is true by default if the MINIO_UPDATE is not set
+	// or is not set to 'off', if MINIO_UPDATE is set to 'off' then
+	// in-place update is off.
+	globalInplaceUpdateDisabled = strings.EqualFold(os.Getenv("MINIO_UPDATE"), "off")
+
+	// Validate and store the storage class env variables only for XL/Dist XL setups
+	if globalIsXL {
+		var err error
+
+		// Check for environment variables and parse into storageClass struct
+		if ssc := os.Getenv(standardStorageClassEnv); ssc != "" {
+			globalStandardStorageClass, err = parseStorageClass(ssc)
+			fatalIf(err, "Invalid value set in environment variable %s.", standardStorageClassEnv)
+		}
+
+		if rrsc := os.Getenv(reducedRedundancyStorageClassEnv); rrsc != "" {
+			globalRRStorageClass, err = parseStorageClass(rrsc)
+			fatalIf(err, "Invalid value set in environment variable %s.", reducedRedundancyStorageClassEnv)
+		}
+
+		// Validation is done after parsing both the storage classes. This is needed because we need one
+		// storage class value to deduce the correct value of the other storage class.
+		if globalRRStorageClass.Scheme != "" {
+			err = validateParity(globalStandardStorageClass.Parity, globalRRStorageClass.Parity)
+			fatalIf(err, "Invalid value set in environment variable %s.", reducedRedundancyStorageClassEnv)
+			globalIsStorageClass = true
+		}
+
+		if globalStandardStorageClass.Scheme != "" {
+			err = validateParity(globalStandardStorageClass.Parity, globalRRStorageClass.Parity)
+			fatalIf(err, "Invalid value set in environment variable %s.", standardStorageClassEnv)
+			globalIsStorageClass = true
+		}
+	}
 }

cmd/config-current.go

@@ -20,69 +20,51 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
+	"reflect"
 	"sync"
 
+	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/quick"
 	"github.com/tidwall/gjson"
 )
 
+// Steps to move from version N to version N+1
+// 1. Add new struct serverConfigVN+1 in config-versions.go
+// 2. Set serverConfigVersion to "N+1"
+// 3. Set serverConfig to serverConfigVN+1
+// 4. Add new migration function (ex. func migrateVNToVN+1()) in config-migrate.go
+// 5. Call migrateVNToVN+1() from migrateConfig() in config-migrate.go
+// 6. Make changes in config-current_test.go for any test change
+
 // Config version
-const v19 = "19"
+const serverConfigVersion = "22"
+
+type serverConfig = serverConfigV22
 
 var (
-	// serverConfig server config.
-	serverConfig   *serverConfigV19
-	serverConfigMu sync.RWMutex
+	// globalServerConfig server config.
+	globalServerConfig   *serverConfig
+	globalServerConfigMu sync.RWMutex
 )
 
-// serverConfigV19 server configuration version '19' which is like
-// version '18' except it adds support for MQTT notifications.
-type serverConfigV19 struct {
-	sync.RWMutex
-	Version string `json:"version"`
-
-	// S3 API configuration.
-	Credential credential  `json:"credential"`
-	Region     string      `json:"region"`
-	Browser    BrowserFlag `json:"browser"`
-
-	// Additional error logging configuration.
-	Logger *loggers `json:"logger"`
-
-	// Notification queue configuration.
-	Notify *notifier `json:"notify"`
-}
-
 // GetVersion get current config version.
-func (s *serverConfigV19) GetVersion() string {
-	s.RLock()
-	defer s.RUnlock()
-
+func (s *serverConfig) GetVersion() string {
 	return s.Version
 }
 
 // SetRegion set a new region.
-func (s *serverConfigV19) SetRegion(region string) {
-	s.Lock()
-	defer s.Unlock()
-
+func (s *serverConfig) SetRegion(region string) {
 	// Save new region.
 	s.Region = region
 }
 
 // GetRegion get current region.
-func (s *serverConfigV19) GetRegion() string {
-	s.RLock()
-	defer s.RUnlock()
-
+func (s *serverConfig) GetRegion() string {
 	return s.Region
 }
 
-// SetCredentials set new credentials. SetCredential returns the previous credential.
-func (s *serverConfigV19) SetCredential(creds credential) (prevCred credential) {
-	s.Lock()
-	defer s.Unlock()
-
+// SetCredential sets new credential and returns the previous credential.
+func (s *serverConfig) SetCredential(creds auth.Credentials) (prevCred auth.Credentials) {
 	// Save previous credential.
 	prevCred = s.Credential
 
@@ -94,52 +76,95 @@ func (s *serverConfigV19) SetCredential(creds credential) (prevCred credential)
 }
 
 // GetCredentials get current credentials.
-func (s *serverConfigV19) GetCredential() credential {
-	s.RLock()
-	defer s.RUnlock()
-
+func (s *serverConfig) GetCredential() auth.Credentials {
 	return s.Credential
 }
 
 // SetBrowser set if browser is enabled.
-func (s *serverConfigV19) SetBrowser(b bool) {
-	s.Lock()
-	defer s.Unlock()
-
+func (s *serverConfig) SetBrowser(b bool) {
 	// Set the new value.
 	s.Browser = BrowserFlag(b)
 }
 
-// GetCredentials get current credentials.
-func (s *serverConfigV19) GetBrowser() bool {
-	s.RLock()
-	defer s.RUnlock()
+func (s *serverConfig) SetStorageClass(standardClass, rrsClass storageClass) {
+	s.StorageClass.Standard = standardClass
+	s.StorageClass.RRS = rrsClass
+}
 
+// GetStorageClass reads storage class fields from current config.
+// It returns the standard and reduced redundancy storage class struct
+func (s *serverConfig) GetStorageClass() (storageClass, storageClass) {
+	return s.StorageClass.Standard, s.StorageClass.RRS
+}
+
+// GetCredentials get current credentials.
+func (s *serverConfig) GetBrowser() bool {
 	return bool(s.Browser)
 }
 
 // Save config.
-func (s *serverConfigV19) Save() error {
-	s.RLock()
-	defer s.RUnlock()
-
+func (s *serverConfig) Save() error {
 	// Save config file.
 	return quick.Save(getConfigFile(), s)
 }
 
-func newServerConfigV19() *serverConfigV19 {
-	srvCfg := &serverConfigV19{
-		Version:    v19,
-		Credential: mustGetNewCredential(),
+// Returns the string describing a difference with the given
+// configuration object. If the given configuration object is
+// identical, an empty string is returned.
+func (s *serverConfig) ConfigDiff(t *serverConfig) string {
+	switch {
+	case t == nil:
+		return "Given configuration is empty"
+	case s.Credential != t.Credential:
+		return "Credential configuration differs"
+	case s.Region != t.Region:
+		return "Region configuration differs"
+	case s.Browser != t.Browser:
+		return "Browser configuration differs"
+	case s.Domain != t.Domain:
+		return "Domain configuration differs"
+	case s.StorageClass != t.StorageClass:
+		return "StorageClass configuration differs"
+	case !reflect.DeepEqual(s.Notify.AMQP, t.Notify.AMQP):
+		return "AMQP Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.NATS, t.Notify.NATS):
+		return "NATS Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.ElasticSearch, t.Notify.ElasticSearch):
+		return "ElasticSearch Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.Redis, t.Notify.Redis):
+		return "Redis Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.PostgreSQL, t.Notify.PostgreSQL):
+		return "PostgreSQL Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.Kafka, t.Notify.Kafka):
+		return "Kafka Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.Webhook, t.Notify.Webhook):
+		return "Webhook Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.MySQL, t.Notify.MySQL):
+		return "MySQL Notification configuration differs"
+	case !reflect.DeepEqual(s.Notify.MQTT, t.Notify.MQTT):
+		return "MQTT Notification configuration differs"
+	case reflect.DeepEqual(s, t):
+		return ""
+	default:
+		// This case will not happen unless this comparison
+		// function has become stale.
+		return "Configuration differs"
+	}
+}
+
+func newServerConfig() *serverConfig {
+	srvCfg := &serverConfig{
+		Version:    serverConfigVersion,
+		Credential: auth.MustGetNewCredentials(),
 		Region:     globalMinioDefaultRegion,
 		Browser:    true,
-		Logger:     &loggers{},
-		Notify:     &notifier{},
+		StorageClass: storageClassConfig{
+			Standard: storageClass{},
+			RRS:      storageClass{},
+		},
+		Notify: notifier{},
 	}
 
-	// Enable console logger by default on a fresh run.
-	srvCfg.Logger.Console = NewConsoleLogger()
-
 	// Make sure to initialize notification configs.
 	srvCfg.Notify.AMQP = make(map[string]amqpNotify)
 	srvCfg.Notify.AMQP["1"] = amqpNotify{}
@@ -167,7 +192,7 @@ func newServerConfigV19() *serverConfigV19 {
 // found, otherwise use default parameters
 func newConfig() error {
 	// Initialize server config.
-	srvCfg := newServerConfigV19()
+	srvCfg := newServerConfig()
 
 	// If env is set override the credentials from config file.
 	if globalIsEnvCreds {
@@ -182,15 +207,23 @@ func newConfig() error {
 		srvCfg.SetRegion(globalServerRegion)
 	}
 
+	if globalIsEnvDomainName {
+		srvCfg.Domain = globalDomainName
+	}
+
+	if globalIsStorageClass {
+		srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
+	}
+
 	// hold the mutex lock before a new config is assigned.
 	// Save the new config globally.
 	// unlock the mutex.
-	serverConfigMu.Lock()
-	serverConfig = srvCfg
-	serverConfigMu.Unlock()
+	globalServerConfigMu.Lock()
+	globalServerConfig = srvCfg
+	globalServerConfigMu.Unlock()
 
 	// Save config into file.
-	return serverConfig.Save()
+	return globalServerConfig.Save()
 }
 
 // doCheckDupJSONKeys recursively detects duplicate json keys
@@ -245,8 +278,8 @@ func checkDupJSONKeys(json string) error {
 }
 
 // getValidConfig - returns valid server configuration
-func getValidConfig() (*serverConfigV19, error) {
-	srvCfg := &serverConfigV19{
+func getValidConfig() (*serverConfig, error) {
+	srvCfg := &serverConfig{
 		Region:  globalMinioDefaultRegion,
 		Browser: true,
 	}
@@ -256,8 +289,8 @@ func getValidConfig() (*serverConfigV19, error) {
 		return nil, err
 	}
 
-	if srvCfg.Version != v19 {
-		return nil, fmt.Errorf("configuration version mismatch. Expected: ‘%s’, Got: ‘%s’", v19, srvCfg.Version)
+	if srvCfg.Version != serverConfigVersion {
+		return nil, fmt.Errorf("configuration version mismatch. Expected: ‘%s’, Got: ‘%s’", serverConfigVersion, srvCfg.Version)
 	}
 
 	// Load config file json and check for duplication json keys
@@ -277,11 +310,6 @@ func getValidConfig() (*serverConfigV19, error) {
 		return nil, errors.New("invalid credential in config file " + configFile)
 	}
 
-	// Validate logger field
-	if err = srvCfg.Logger.Validate(); err != nil {
-		return nil, err
-	}
-
 	// Validate notify field
 	if err = srvCfg.Notify.Validate(); err != nil {
 		return nil, err
@@ -311,19 +339,33 @@ func loadConfig() error {
 		srvCfg.SetRegion(globalServerRegion)
 	}
 
+	if globalIsEnvDomainName {
+		srvCfg.Domain = globalDomainName
+	}
+
+	if globalIsStorageClass {
+		srvCfg.SetStorageClass(globalStandardStorageClass, globalRRStorageClass)
+	}
+
 	// hold the mutex lock before a new config is assigned.
-	serverConfigMu.Lock()
-	serverConfig = srvCfg
+	globalServerConfigMu.Lock()
+	globalServerConfig = srvCfg
 	if !globalIsEnvCreds {
-		globalActiveCred = serverConfig.GetCredential()
+		globalActiveCred = globalServerConfig.GetCredential()
 	}
 	if !globalIsEnvBrowser {
-		globalIsBrowserEnabled = serverConfig.GetBrowser()
+		globalIsBrowserEnabled = globalServerConfig.GetBrowser()
 	}
 	if !globalIsEnvRegion {
-		globalServerRegion = serverConfig.GetRegion()
+		globalServerRegion = globalServerConfig.GetRegion()
 	}
-	serverConfigMu.Unlock()
+	if !globalIsEnvDomainName {
+		globalDomainName = globalServerConfig.Domain
+	}
+	if !globalIsStorageClass {
+		globalStandardStorageClass, globalRRStorageClass = globalServerConfig.GetStorageClass()
+	}
+	globalServerConfigMu.Unlock()
 
 	return nil
 }

cmd/config-current_test.go

@@ -23,6 +23,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/minio/minio/pkg/auth"
 	"github.com/tidwall/gjson"
 )
 
@@ -34,95 +35,72 @@ func TestServerConfig(t *testing.T) {
 	// remove the root directory after the test ends.
 	defer os.RemoveAll(rootPath)
 
-	if serverConfig.GetRegion() != globalMinioDefaultRegion {
-		t.Errorf("Expecting region `us-east-1` found %s", serverConfig.GetRegion())
+	if globalServerConfig.GetRegion() != globalMinioDefaultRegion {
+		t.Errorf("Expecting region `us-east-1` found %s", globalServerConfig.GetRegion())
 	}
 
 	// Set new region and verify.
-	serverConfig.SetRegion("us-west-1")
-	if serverConfig.GetRegion() != "us-west-1" {
-		t.Errorf("Expecting region `us-west-1` found %s", serverConfig.GetRegion())
+	globalServerConfig.SetRegion("us-west-1")
+	if globalServerConfig.GetRegion() != "us-west-1" {
+		t.Errorf("Expecting region `us-west-1` found %s", globalServerConfig.GetRegion())
 	}
 
 	// Set new amqp notification id.
-	serverConfig.Notify.SetAMQPByID("2", amqpNotify{})
-	savedNotifyCfg1 := serverConfig.Notify.GetAMQPByID("2")
+	globalServerConfig.Notify.SetAMQPByID("2", amqpNotify{})
+	savedNotifyCfg1 := globalServerConfig.Notify.GetAMQPByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg1, amqpNotify{}) {
 		t.Errorf("Expecting AMQP config %#v found %#v", amqpNotify{}, savedNotifyCfg1)
 	}
 
 	// Set new elastic search notification id.
-	serverConfig.Notify.SetElasticSearchByID("2", elasticSearchNotify{})
-	savedNotifyCfg2 := serverConfig.Notify.GetElasticSearchByID("2")
+	globalServerConfig.Notify.SetElasticSearchByID("2", elasticSearchNotify{})
+	savedNotifyCfg2 := globalServerConfig.Notify.GetElasticSearchByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg2, elasticSearchNotify{}) {
 		t.Errorf("Expecting Elasticsearch config %#v found %#v", elasticSearchNotify{}, savedNotifyCfg2)
 	}
 
 	// Set new redis notification id.
-	serverConfig.Notify.SetRedisByID("2", redisNotify{})
-	savedNotifyCfg3 := serverConfig.Notify.GetRedisByID("2")
+	globalServerConfig.Notify.SetRedisByID("2", redisNotify{})
+	savedNotifyCfg3 := globalServerConfig.Notify.GetRedisByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg3, redisNotify{}) {
 		t.Errorf("Expecting Redis config %#v found %#v", redisNotify{}, savedNotifyCfg3)
 	}
 
 	// Set new kafka notification id.
-	serverConfig.Notify.SetKafkaByID("2", kafkaNotify{})
-	savedNotifyCfg4 := serverConfig.Notify.GetKafkaByID("2")
+	globalServerConfig.Notify.SetKafkaByID("2", kafkaNotify{})
+	savedNotifyCfg4 := globalServerConfig.Notify.GetKafkaByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg4, kafkaNotify{}) {
 		t.Errorf("Expecting Kafka config %#v found %#v", kafkaNotify{}, savedNotifyCfg4)
 	}
 
 	// Set new Webhook notification id.
-	serverConfig.Notify.SetWebhookByID("2", webhookNotify{})
-	savedNotifyCfg5 := serverConfig.Notify.GetWebhookByID("2")
+	globalServerConfig.Notify.SetWebhookByID("2", webhookNotify{})
+	savedNotifyCfg5 := globalServerConfig.Notify.GetWebhookByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg5, webhookNotify{}) {
 		t.Errorf("Expecting Webhook config %#v found %#v", webhookNotify{}, savedNotifyCfg5)
 	}
 
-	// Set new console logger.
 	// Set new MySQL notification id.
-	serverConfig.Notify.SetMySQLByID("2", mySQLNotify{})
-	savedNotifyCfg6 := serverConfig.Notify.GetMySQLByID("2")
+	globalServerConfig.Notify.SetMySQLByID("2", mySQLNotify{})
+	savedNotifyCfg6 := globalServerConfig.Notify.GetMySQLByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg6, mySQLNotify{}) {
 		t.Errorf("Expecting Webhook config %#v found %#v", mySQLNotify{}, savedNotifyCfg6)
 	}
 
-	// Set new console logger.
 	// Set new MQTT notification id.
-	serverConfig.Notify.SetMQTTByID("2", mqttNotify{})
-	savedNotifyCfg7 := serverConfig.Notify.GetMQTTByID("2")
+	globalServerConfig.Notify.SetMQTTByID("2", mqttNotify{})
+	savedNotifyCfg7 := globalServerConfig.Notify.GetMQTTByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg7, mqttNotify{}) {
 		t.Errorf("Expecting Webhook config %#v found %#v", mqttNotify{}, savedNotifyCfg7)
 	}
 
-	consoleLogger := NewConsoleLogger()
-	serverConfig.Logger.SetConsole(consoleLogger)
-	consoleCfg := serverConfig.Logger.GetConsole()
-	if !reflect.DeepEqual(consoleCfg, consoleLogger) {
-		t.Errorf("Expecting console logger config %#v found %#v", consoleLogger, consoleCfg)
-	}
-	// Set new console logger.
-	consoleLogger.Enable = false
-	serverConfig.Logger.SetConsole(consoleLogger)
-
-	// Set new file logger.
-	fileLogger := NewFileLogger("test-log-file")
-	serverConfig.Logger.SetFile(fileLogger)
-	fileCfg := serverConfig.Logger.GetFile()
-	if !reflect.DeepEqual(fileCfg, fileLogger) {
-		t.Errorf("Expecting file logger config %#v found %#v", fileLogger, fileCfg)
-	}
-	// Set new file logger.
-	fileLogger.Enable = false
-	serverConfig.Logger.SetFile(fileLogger)
-
 	// Match version.
-	if serverConfig.GetVersion() != v19 {
-		t.Errorf("Expecting version %s found %s", serverConfig.GetVersion(), v19)
+	if globalServerConfig.GetVersion() != serverConfigVersion {
+		t.Errorf("Expecting version %s found %s", globalServerConfig.GetVersion(), serverConfigVersion)
 	}
 
 	// Attempt to save.
-	if err := serverConfig.Save(); err != nil {
+	if err := globalServerConfig.Save(); err != nil {
 		t.Fatalf("Unable to save updated config file %s", err)
 	}
 
@@ -149,6 +127,9 @@ func TestServerConfigWithEnvs(t *testing.T) {
 	os.Setenv("MINIO_REGION", "us-west-1")
 	defer os.Unsetenv("MINIO_REGION")
 
+	os.Setenv("MINIO_DOMAIN", "domain.com")
+	defer os.Unsetenv("MINIO_DOMAIN")
+
 	defer resetGlobalIsEnvs()
 
 	// Get test root.
@@ -169,17 +150,17 @@ func TestServerConfigWithEnvs(t *testing.T) {
 	defer os.RemoveAll(rootPath)
 
 	// Check if serverConfig has
-	if serverConfig.GetBrowser() {
-		t.Errorf("Expecting browser is set to false found %v", serverConfig.GetBrowser())
+	if globalServerConfig.GetBrowser() {
+		t.Errorf("Expecting browser is set to false found %v", globalServerConfig.GetBrowser())
 	}
 
 	// Check if serverConfig has
-	if serverConfig.GetRegion() != "us-west-1" {
-		t.Errorf("Expecting region to be \"us-west-1\" found %v", serverConfig.GetRegion())
+	if globalServerConfig.GetRegion() != "us-west-1" {
+		t.Errorf("Expecting region to be \"us-west-1\" found %v", globalServerConfig.GetRegion())
 	}
 
 	// Check if serverConfig has
-	cred := serverConfig.GetCredential()
+	cred := globalServerConfig.GetCredential()
 
 	if cred.AccessKey != "minio" {
 		t.Errorf("Expecting access key to be `minio` found %s", cred.AccessKey)
@@ -189,6 +170,9 @@ func TestServerConfigWithEnvs(t *testing.T) {
 		t.Errorf("Expecting access key to be `minio123` found %s", cred.SecretKey)
 	}
 
+	if globalServerConfig.Domain != "domain.com" {
+		t.Errorf("Expecting Domain to be `domain.com` found " + globalServerConfig.Domain)
+	}
 }
 
 func TestCheckDupJSONKeys(t *testing.T) {
@@ -231,7 +215,7 @@ func TestValidateConfig(t *testing.T) {
 
 	configPath := filepath.Join(rootPath, minioConfigFile)
 
-	v := v19
+	v := serverConfigVersion
 
 	testCases := []struct {
 		configData string
@@ -267,58 +251,55 @@ func TestValidateConfig(t *testing.T) {
 		// Test 10 - duplicated json keys
 		{`{"version": "` + v + `", "browser": "on", "browser": "on", "region":"us-east-1", "credential" : {"accessKey":"minio", "secretKey":"minio123"}}`, false},
 
-		// Test 11 - empty filename field in File
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "logger": { "file": { "enable": true, "filename": "" } }}`, false},
-
-		// Test 12 - Test AMQP
+		// Test 11 - Test AMQP
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "amqp": { "1": { "enable": true, "url": "", "exchange": "", "routingKey": "", "exchangeType": "", "mandatory": false, "immediate": false, "durable": false, "internal": false, "noWait": false, "autoDeleted": false }}}}`, false},
 
-		// Test 13 - Test NATS
+		// Test 12 - Test NATS
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "nats": { "1": { "enable": true, "address": "", "subject": "", "username": "", "password": "", "token": "", "secure": false, "pingInterval": 0, "streaming": { "enable": false, "clusterID": "", "clientID": "", "async": false, "maxPubAcksInflight": 0 } } }}}`, false},
 
-		// Test 14 - Test ElasticSearch
+		// Test 13 - Test ElasticSearch
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "url": "", "index": "" } }}}`, false},
 
-		// Test 15 - Test Redis
+		// Test 14 - Test Redis
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "address": "", "password": "", "key": "" } }}}`, false},
 
-		// Test 16 - Test PostgreSQL
+		// Test 15 - Test PostgreSQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "table": "", "host": "", "port": "", "user": "", "password": "", "database": "" }}}}`, false},
 
-		// Test 17 - Test Kafka
+		// Test 16 - Test Kafka
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "kafka": { "1": { "enable": true, "brokers": null, "topic": "" } }}}`, false},
 
-		// Test 18 - Test Webhook
+		// Test 17 - Test Webhook
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "webhook": { "1": { "enable": true, "endpoint": "" } }}}`, false},
 
-		// Test 20 - Test MySQL
+		// Test 18 - Test MySQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "table": "", "host": "", "port": "", "user": "", "password": "", "database": "" }}}}`, false},
 
-		// Test 21 - Test Format for MySQL
+		// Test 19 - Test Format for MySQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "format": "invalid", "table": "xxx", "host": "10.0.0.1", "port": "3306", "user": "abc", "password": "pqr", "database": "test1" }}}}`, false},
 
-		// Test 22 - Test valid Format for MySQL
+		// Test 20 - Test valid Format for MySQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mysql": { "1": { "enable": true, "dsnString": "",  "format": "namespace", "table": "xxx", "host": "10.0.0.1", "port": "3306", "user": "abc", "password": "pqr", "database": "test1" }}}}`, true},
 
-		// Test 23 - Test Format for PostgreSQL
+		// Test 21 - Test Format for PostgreSQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "format": "invalid", "table": "xxx", "host": "myhost", "port": "5432", "user": "abc", "password": "pqr", "database": "test1" }}}}`, false},
 
-		// Test 24 - Test valid Format for PostgreSQL
+		// Test 22 - Test valid Format for PostgreSQL
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "postgresql": { "1": { "enable": true, "connectionString": "", "format": "namespace", "table": "xxx", "host": "myhost", "port": "5432", "user": "abc", "password": "pqr", "database": "test1" }}}}`, true},
 
-		// Test 25 - Test Format for ElasticSearch
+		// Test 23 - Test Format for ElasticSearch
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "format": "invalid", "url": "example.com", "index": "myindex" } }}}`, false},
 
-		// Test 26 - Test valid Format for ElasticSearch
+		// Test 24 - Test valid Format for ElasticSearch
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "format": "namespace", "url": "example.com", "index": "myindex" } }}}`, true},
 
-		// Test 27 - Test Format for Redis
+		// Test 25 - Test Format for Redis
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "format": "invalid", "address": "example.com:80", "password": "xxx", "key": "key1" } }}}`, false},
 
-		// Test 28 - Test valid Format for Redis
+		// Test 26 - Test valid Format for Redis
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "redis": { "1": { "enable": true, "format": "namespace", "address": "example.com:80", "password": "xxx", "key": "key1" } }}}`, true},
 
-		// Test 29 - Test MQTT
+		// Test 27 - Test MQTT
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "mqtt": { "1": { "enable": true, "broker": "",  "topic": "", "qos": 0, "clientId": "", "username": "", "password": ""}}}}`, false},
 	}
 
@@ -331,8 +312,97 @@ func TestValidateConfig(t *testing.T) {
 			t.Errorf("Test %d, should pass but it failed with err = %v", i+1, verr)
 		}
 		if !testCase.shouldPass && verr == nil {
-			t.Errorf("Test %d, should fail but it succeed.", i+1)
+			t.Errorf("Test %d, should fail but it succeeded.", i+1)
 		}
 	}
 
 }
+
+func TestConfigDiff(t *testing.T) {
+	testCases := []struct {
+		s, t *serverConfig
+		diff string
+	}{
+		// 1
+		{&serverConfig{}, nil, "Given configuration is empty"},
+		// 2
+		{
+			&serverConfig{Credential: auth.Credentials{"u1", "p1"}},
+			&serverConfig{Credential: auth.Credentials{"u1", "p2"}},
+			"Credential configuration differs",
+		},
+		// 3
+		{&serverConfig{Region: "us-east-1"}, &serverConfig{Region: "us-west-1"}, "Region configuration differs"},
+		// 4
+		{&serverConfig{Browser: false}, &serverConfig{Browser: true}, "Browser configuration differs"},
+		// 5
+		{&serverConfig{Domain: "domain1"}, &serverConfig{Domain: "domain2"}, "Domain configuration differs"},
+		// 6
+		{
+			&serverConfig{StorageClass: storageClassConfig{storageClass{"1", 8}, storageClass{"2", 6}}},
+			&serverConfig{StorageClass: storageClassConfig{storageClass{"1", 8}, storageClass{"2", 4}}},
+			"StorageClass configuration differs",
+		},
+		// 7
+		{
+			&serverConfig{Notify: notifier{AMQP: map[string]amqpNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{AMQP: map[string]amqpNotify{"1": {Enable: false}}}},
+			"AMQP Notification configuration differs",
+		},
+		// 8
+		{
+			&serverConfig{Notify: notifier{NATS: map[string]natsNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{NATS: map[string]natsNotify{"1": {Enable: false}}}},
+			"NATS Notification configuration differs",
+		},
+		// 9
+		{
+			&serverConfig{Notify: notifier{ElasticSearch: map[string]elasticSearchNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{ElasticSearch: map[string]elasticSearchNotify{"1": {Enable: false}}}},
+			"ElasticSearch Notification configuration differs",
+		},
+		// 10
+		{
+			&serverConfig{Notify: notifier{Redis: map[string]redisNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{Redis: map[string]redisNotify{"1": {Enable: false}}}},
+			"Redis Notification configuration differs",
+		},
+		// 11
+		{
+			&serverConfig{Notify: notifier{PostgreSQL: map[string]postgreSQLNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{PostgreSQL: map[string]postgreSQLNotify{"1": {Enable: false}}}},
+			"PostgreSQL Notification configuration differs",
+		},
+		// 12
+		{
+			&serverConfig{Notify: notifier{Kafka: map[string]kafkaNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{Kafka: map[string]kafkaNotify{"1": {Enable: false}}}},
+			"Kafka Notification configuration differs",
+		},
+		// 13
+		{
+			&serverConfig{Notify: notifier{Webhook: map[string]webhookNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{Webhook: map[string]webhookNotify{"1": {Enable: false}}}},
+			"Webhook Notification configuration differs",
+		},
+		// 14
+		{
+			&serverConfig{Notify: notifier{MySQL: map[string]mySQLNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{MySQL: map[string]mySQLNotify{"1": {Enable: false}}}},
+			"MySQL Notification configuration differs",
+		},
+		// 15
+		{
+			&serverConfig{Notify: notifier{MQTT: map[string]mqttNotify{"1": {Enable: true}}}},
+			&serverConfig{Notify: notifier{MQTT: map[string]mqttNotify{"1": {Enable: false}}}},
+			"MQTT Notification configuration differs",
+		},
+	}
+
+	for i, testCase := range testCases {
+		got := testCase.s.ConfigDiff(testCase.t)
+		if got != testCase.diff {
+			t.Errorf("Test %d: got %s expected %s", i+1, got, testCase.diff)
+		}
+	}
+}

cmd/config-dir.go

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2015, 2016, 2017 Minio, Inc.
+ * Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -95,14 +95,16 @@ func (config *ConfigDir) GetPrivateKeyFile() string {
 	return filepath.Join(config.getCertsDir(), privateKeyFile)
 }
 
-func mustGetDefaultConfigDir() string {
+func getDefaultConfigDir() string {
 	homeDir, err := homedir.Dir()
-	fatalIf(err, "Unable to get home directory.")
+	if err != nil {
+		return ""
+	}
 
 	return filepath.Join(homeDir, defaultMinioConfigDir)
 }
 
-var configDir = &ConfigDir{dir: mustGetDefaultConfigDir()}
+var configDir = &ConfigDir{dir: getDefaultConfigDir()}
 
 func setConfigDir(dir string) {
 	configDir.Set(dir)

cmd/config-migrate.go

@@ -21,6 +21,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/minio/minio/pkg/auth"
 	"github.com/minio/minio/pkg/quick"
 )
 
@@ -142,12 +143,26 @@ func migrateConfig() error {
 		}
 		fallthrough
 	case "18":
-		// Migrate version '17' to '18'.
+		// Migrate version '18' to '19'.
 		if err = migrateV18ToV19(); err != nil {
 			return err
 		}
 		fallthrough
-	case v19:
+	case "19":
+		if err = migrateV19ToV20(); err != nil {
+			return err
+		}
+		fallthrough
+	case "20":
+		if err = migrateV20ToV21(); err != nil {
+			return err
+		}
+		fallthrough
+	case "21":
+		if err = migrateV21ToV22(); err != nil {
+			return err
+		}
+	case serverConfigVersion:
 		// No migration needed. this always points to current version.
 		err = nil
 	}
@@ -190,7 +205,7 @@ func migrateV2ToV3() error {
 		return nil
 	}
 
-	cred, err := createCredential(cv2.Credentials.AccessKey, cv2.Credentials.SecretKey)
+	cred, err := auth.CreateCredentials(cv2.Credentials.AccessKey, cv2.Credentials.SecretKey)
 	if err != nil {
 		return fmt.Errorf("Invalid credential in V2 configuration file. %v", err)
 	}
@@ -1132,14 +1147,6 @@ func migrateV15ToV16() error {
 	// Load browser config from existing config in the file.
 	srvConfig.Browser = cv15.Browser
 
-	// Migrate console and file fields
-	if cv15.Logger.Console.Enable {
-		srvConfig.Logger.Console = NewConsoleLogger()
-	}
-	if cv15.Logger.File.Enable {
-		srvConfig.Logger.File = NewFileLogger(cv15.Logger.File.Filename)
-	}
-
 	if err = quick.Save(configFile, srvConfig); err != nil {
 		return fmt.Errorf("Failed to migrate config from ‘%s’ to ‘%s’. %v", cv15.Version, srvConfig.Version, err)
 	}
@@ -1478,3 +1485,325 @@ func migrateV18ToV19() error {
 	log.Printf(configMigrateMSGTemplate, configFile, cv18.Version, srvConfig.Version)
 	return nil
 }
+
+func migrateV19ToV20() error {
+	configFile := getConfigFile()
+
+	cv19 := &serverConfigV19{}
+	_, err := quick.Load(configFile, cv19)
+	if os.IsNotExist(err) {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config version ‘18’. %v", err)
+	}
+	if cv19.Version != "19" {
+		return nil
+	}
+
+	// Copy over fields from V19 into V20 config struct
+	srvConfig := &serverConfigV20{
+		Logger: &loggers{},
+		Notify: &notifier{},
+	}
+	srvConfig.Version = "20"
+	srvConfig.Credential = cv19.Credential
+	srvConfig.Region = cv19.Region
+	if srvConfig.Region == "" {
+		// Region needs to be set for AWS Signature Version 4.
+		srvConfig.Region = globalMinioDefaultRegion
+	}
+
+	srvConfig.Logger.Console = cv19.Logger.Console
+	srvConfig.Logger.File = cv19.Logger.File
+
+	// check and set notifiers config
+	if len(cv19.Notify.AMQP) == 0 {
+		srvConfig.Notify.AMQP = make(map[string]amqpNotify)
+		srvConfig.Notify.AMQP["1"] = amqpNotify{}
+	} else {
+		// New deliveryMode parameter is added for AMQP,
+		// default value is already 0, so nothing to
+		// explicitly migrate here.
+		srvConfig.Notify.AMQP = cv19.Notify.AMQP
+	}
+	if len(cv19.Notify.ElasticSearch) == 0 {
+		srvConfig.Notify.ElasticSearch = make(map[string]elasticSearchNotify)
+		srvConfig.Notify.ElasticSearch["1"] = elasticSearchNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.ElasticSearch = cv19.Notify.ElasticSearch
+	}
+	if len(cv19.Notify.Redis) == 0 {
+		srvConfig.Notify.Redis = make(map[string]redisNotify)
+		srvConfig.Notify.Redis["1"] = redisNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.Redis = cv19.Notify.Redis
+	}
+	if len(cv19.Notify.PostgreSQL) == 0 {
+		srvConfig.Notify.PostgreSQL = make(map[string]postgreSQLNotify)
+		srvConfig.Notify.PostgreSQL["1"] = postgreSQLNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.PostgreSQL = cv19.Notify.PostgreSQL
+	}
+	if len(cv19.Notify.Kafka) == 0 {
+		srvConfig.Notify.Kafka = make(map[string]kafkaNotify)
+		srvConfig.Notify.Kafka["1"] = kafkaNotify{}
+	} else {
+		srvConfig.Notify.Kafka = cv19.Notify.Kafka
+	}
+	if len(cv19.Notify.NATS) == 0 {
+		srvConfig.Notify.NATS = make(map[string]natsNotify)
+		srvConfig.Notify.NATS["1"] = natsNotify{}
+	} else {
+		srvConfig.Notify.NATS = cv19.Notify.NATS
+	}
+	if len(cv19.Notify.Webhook) == 0 {
+		srvConfig.Notify.Webhook = make(map[string]webhookNotify)
+		srvConfig.Notify.Webhook["1"] = webhookNotify{}
+	} else {
+		srvConfig.Notify.Webhook = cv19.Notify.Webhook
+	}
+	if len(cv19.Notify.MySQL) == 0 {
+		srvConfig.Notify.MySQL = make(map[string]mySQLNotify)
+		srvConfig.Notify.MySQL["1"] = mySQLNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.MySQL = cv19.Notify.MySQL
+	}
+	if len(cv19.Notify.MQTT) == 0 {
+		srvConfig.Notify.MQTT = make(map[string]mqttNotify)
+		srvConfig.Notify.MQTT["1"] = mqttNotify{}
+	} else {
+		srvConfig.Notify.MQTT = cv19.Notify.MQTT
+	}
+
+	// Load browser config from existing config in the file.
+	srvConfig.Browser = cv19.Browser
+
+	if err = quick.Save(configFile, srvConfig); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘%s’ to ‘%s’. %v", cv19.Version, srvConfig.Version, err)
+	}
+
+	log.Printf(configMigrateMSGTemplate, configFile, cv19.Version, srvConfig.Version)
+	return nil
+}
+
+func migrateV20ToV21() error {
+	configFile := getConfigFile()
+
+	cv20 := &serverConfigV20{}
+	_, err := quick.Load(configFile, cv20)
+	if os.IsNotExist(err) {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config version ‘20’. %v", err)
+	}
+	if cv20.Version != "20" {
+		return nil
+	}
+
+	// Copy over fields from V20 into V21 config struct
+	srvConfig := &serverConfigV21{
+		Notify: &notifier{},
+	}
+	srvConfig.Version = "21"
+	srvConfig.Credential = cv20.Credential
+	srvConfig.Region = cv20.Region
+	if srvConfig.Region == "" {
+		// Region needs to be set for AWS Signature Version 4.
+		srvConfig.Region = globalMinioDefaultRegion
+	}
+
+	// check and set notifiers config
+	if len(cv20.Notify.AMQP) == 0 {
+		srvConfig.Notify.AMQP = make(map[string]amqpNotify)
+		srvConfig.Notify.AMQP["1"] = amqpNotify{}
+	} else {
+		// New deliveryMode parameter is added for AMQP,
+		// default value is already 0, so nothing to
+		// explicitly migrate here.
+		srvConfig.Notify.AMQP = cv20.Notify.AMQP
+	}
+	if len(cv20.Notify.ElasticSearch) == 0 {
+		srvConfig.Notify.ElasticSearch = make(map[string]elasticSearchNotify)
+		srvConfig.Notify.ElasticSearch["1"] = elasticSearchNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.ElasticSearch = cv20.Notify.ElasticSearch
+	}
+	if len(cv20.Notify.Redis) == 0 {
+		srvConfig.Notify.Redis = make(map[string]redisNotify)
+		srvConfig.Notify.Redis["1"] = redisNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.Redis = cv20.Notify.Redis
+	}
+	if len(cv20.Notify.PostgreSQL) == 0 {
+		srvConfig.Notify.PostgreSQL = make(map[string]postgreSQLNotify)
+		srvConfig.Notify.PostgreSQL["1"] = postgreSQLNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.PostgreSQL = cv20.Notify.PostgreSQL
+	}
+	if len(cv20.Notify.Kafka) == 0 {
+		srvConfig.Notify.Kafka = make(map[string]kafkaNotify)
+		srvConfig.Notify.Kafka["1"] = kafkaNotify{}
+	} else {
+		srvConfig.Notify.Kafka = cv20.Notify.Kafka
+	}
+	if len(cv20.Notify.NATS) == 0 {
+		srvConfig.Notify.NATS = make(map[string]natsNotify)
+		srvConfig.Notify.NATS["1"] = natsNotify{}
+	} else {
+		srvConfig.Notify.NATS = cv20.Notify.NATS
+	}
+	if len(cv20.Notify.Webhook) == 0 {
+		srvConfig.Notify.Webhook = make(map[string]webhookNotify)
+		srvConfig.Notify.Webhook["1"] = webhookNotify{}
+	} else {
+		srvConfig.Notify.Webhook = cv20.Notify.Webhook
+	}
+	if len(cv20.Notify.MySQL) == 0 {
+		srvConfig.Notify.MySQL = make(map[string]mySQLNotify)
+		srvConfig.Notify.MySQL["1"] = mySQLNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.MySQL = cv20.Notify.MySQL
+	}
+	if len(cv20.Notify.MQTT) == 0 {
+		srvConfig.Notify.MQTT = make(map[string]mqttNotify)
+		srvConfig.Notify.MQTT["1"] = mqttNotify{}
+	} else {
+		srvConfig.Notify.MQTT = cv20.Notify.MQTT
+	}
+
+	// Load browser config from existing config in the file.
+	srvConfig.Browser = cv20.Browser
+
+	// Load domain config from existing config in the file.
+	srvConfig.Domain = cv20.Domain
+
+	if err = quick.Save(configFile, srvConfig); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘%s’ to ‘%s’. %v", cv20.Version, srvConfig.Version, err)
+	}
+
+	log.Printf(configMigrateMSGTemplate, configFile, cv20.Version, srvConfig.Version)
+	return nil
+}
+
+func migrateV21ToV22() error {
+	configFile := getConfigFile()
+
+	cv21 := &serverConfigV21{}
+	_, err := quick.Load(configFile, cv21)
+	if os.IsNotExist(err) {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf("Unable to load config version ‘21’. %v", err)
+	}
+	if cv21.Version != "21" {
+		return nil
+	}
+
+	// Copy over fields from V21 into V22 config struct
+	srvConfig := &serverConfigV22{
+		Notify: notifier{},
+	}
+	srvConfig.Version = serverConfigVersion
+	srvConfig.Credential = cv21.Credential
+	srvConfig.Region = cv21.Region
+	if srvConfig.Region == "" {
+		// Region needs to be set for AWS Signature Version 4.
+		srvConfig.Region = globalMinioDefaultRegion
+	}
+
+	// check and set notifiers config
+	if len(cv21.Notify.AMQP) == 0 {
+		srvConfig.Notify.AMQP = make(map[string]amqpNotify)
+		srvConfig.Notify.AMQP["1"] = amqpNotify{}
+	} else {
+		// New deliveryMode parameter is added for AMQP,
+		// default value is already 0, so nothing to
+		// explicitly migrate here.
+		srvConfig.Notify.AMQP = cv21.Notify.AMQP
+	}
+	if len(cv21.Notify.ElasticSearch) == 0 {
+		srvConfig.Notify.ElasticSearch = make(map[string]elasticSearchNotify)
+		srvConfig.Notify.ElasticSearch["1"] = elasticSearchNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.ElasticSearch = cv21.Notify.ElasticSearch
+	}
+	if len(cv21.Notify.Redis) == 0 {
+		srvConfig.Notify.Redis = make(map[string]redisNotify)
+		srvConfig.Notify.Redis["1"] = redisNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.Redis = cv21.Notify.Redis
+	}
+	if len(cv21.Notify.PostgreSQL) == 0 {
+		srvConfig.Notify.PostgreSQL = make(map[string]postgreSQLNotify)
+		srvConfig.Notify.PostgreSQL["1"] = postgreSQLNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.PostgreSQL = cv21.Notify.PostgreSQL
+	}
+	if len(cv21.Notify.Kafka) == 0 {
+		srvConfig.Notify.Kafka = make(map[string]kafkaNotify)
+		srvConfig.Notify.Kafka["1"] = kafkaNotify{}
+	} else {
+		srvConfig.Notify.Kafka = cv21.Notify.Kafka
+	}
+	if len(cv21.Notify.NATS) == 0 {
+		srvConfig.Notify.NATS = make(map[string]natsNotify)
+		srvConfig.Notify.NATS["1"] = natsNotify{}
+	} else {
+		srvConfig.Notify.NATS = cv21.Notify.NATS
+	}
+	if len(cv21.Notify.Webhook) == 0 {
+		srvConfig.Notify.Webhook = make(map[string]webhookNotify)
+		srvConfig.Notify.Webhook["1"] = webhookNotify{}
+	} else {
+		srvConfig.Notify.Webhook = cv21.Notify.Webhook
+	}
+	if len(cv21.Notify.MySQL) == 0 {
+		srvConfig.Notify.MySQL = make(map[string]mySQLNotify)
+		srvConfig.Notify.MySQL["1"] = mySQLNotify{
+			Format: formatNamespace,
+		}
+	} else {
+		srvConfig.Notify.MySQL = cv21.Notify.MySQL
+	}
+	if len(cv21.Notify.MQTT) == 0 {
+		srvConfig.Notify.MQTT = make(map[string]mqttNotify)
+		srvConfig.Notify.MQTT["1"] = mqttNotify{}
+	} else {
+		srvConfig.Notify.MQTT = cv21.Notify.MQTT
+	}
+
+	// Load browser config from existing config in the file.
+	srvConfig.Browser = cv21.Browser
+
+	// Load domain config from existing config in the file.
+	srvConfig.Domain = cv21.Domain
+
+	if err = quick.Save(configFile, srvConfig); err != nil {
+		return fmt.Errorf("Failed to migrate config from ‘%s’ to ‘%s’. %v", cv21.Version, srvConfig.Version, err)
+	}
+
+	log.Printf(configMigrateMSGTemplate, configFile, cv21.Version, srvConfig.Version)
+	return nil
+}

cmd/config-migrate_test.go

@@ -125,11 +125,16 @@ func TestServerConfigMigrateInexistentConfig(t *testing.T) {
 	if err := migrateV18ToV19(); err != nil {
 		t.Fatal("migrate v18 to v19 should succeed when no config file is found")
 	}
-
+	if err := migrateV19ToV20(); err != nil {
+		t.Fatal("migrate v19 to v20 should succeed when no config file is found")
+	}
+	if err := migrateV20ToV21(); err != nil {
+		t.Fatal("migrate v20 to v21 should succeed when no config file is found")
+	}
 }
 
-// Test if a config migration from v2 to v19 is successfully done
-func TestServerConfigMigrateV2toV19(t *testing.T) {
+// Test if a config migration from v2 to v21 is successfully done
+func TestServerConfigMigrateV2toV21(t *testing.T) {
 	rootPath, err := newTestConfig(globalMinioDefaultRegion)
 	if err != nil {
 		t.Fatalf("Init Test config failed")
@@ -169,17 +174,17 @@ func TestServerConfigMigrateV2toV19(t *testing.T) {
 	}
 
 	// Check the version number in the upgraded config file
-	expectedVersion := v19
-	if serverConfig.Version != expectedVersion {
-		t.Fatalf("Expect version "+expectedVersion+", found: %v", serverConfig.Version)
+	expectedVersion := serverConfigVersion
+	if globalServerConfig.Version != expectedVersion {
+		t.Fatalf("Expect version "+expectedVersion+", found: %v", globalServerConfig.Version)
 	}
 
 	// Check if accessKey and secretKey are not altered during migration
-	if serverConfig.Credential.AccessKey != accessKey {
-		t.Fatalf("Access key lost during migration, expected: %v, found:%v", accessKey, serverConfig.Credential.AccessKey)
+	if globalServerConfig.Credential.AccessKey != accessKey {
+		t.Fatalf("Access key lost during migration, expected: %v, found:%v", accessKey, globalServerConfig.Credential.AccessKey)
 	}
-	if serverConfig.Credential.SecretKey != secretKey {
-		t.Fatalf("Secret key lost during migration, expected: %v, found: %v", secretKey, serverConfig.Credential.SecretKey)
+	if globalServerConfig.Credential.SecretKey != secretKey {
+		t.Fatalf("Secret key lost during migration, expected: %v, found: %v", secretKey, globalServerConfig.Credential.SecretKey)
 	}
 }
 
@@ -252,6 +257,12 @@ func TestServerConfigMigrateFaultyConfig(t *testing.T) {
 	if err := migrateV18ToV19(); err == nil {
 		t.Fatal("migrateConfigV18ToV19() should fail with a corrupted json")
 	}
+	if err := migrateV19ToV20(); err == nil {
+		t.Fatal("migrateConfigV19ToV20() should fail with a corrupted json")
+	}
+	if err := migrateV20ToV21(); err == nil {
+		t.Fatal("migrateConfigV20ToV21() should fail with a corrupted json")
+	}
 }
 
 // Test if all migrate code returns error with corrupted config files

cmd/config-versions.go

@@ -16,7 +16,11 @@
 
 package cmd
 
-import "sync"
+import (
+	"sync"
+
+	"github.com/minio/minio/pkg/auth"
+)
 
 /////////////////// Config V1 ///////////////////
 type configV1 struct {
@@ -92,8 +96,8 @@ type configV3 struct {
 	Addr string `json:"address"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV3 `json:"logger"`
@@ -122,8 +126,8 @@ type configV4 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV4 `json:"logger"`
@@ -179,8 +183,8 @@ type configV5 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV5 `json:"logger"`
@@ -209,8 +213,8 @@ type configV6 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV6 `json:"logger"`
@@ -246,8 +250,8 @@ type serverConfigV7 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV6 `json:"logger"`
@@ -265,8 +269,8 @@ type serverConfigV8 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV6 `json:"logger"`
@@ -284,8 +288,8 @@ type serverConfigV9 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV6 `json:"logger"`
@@ -310,8 +314,8 @@ type serverConfigV10 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV7 `json:"logger"`
@@ -338,8 +342,8 @@ type serverConfigV11 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV7 `json:"logger"`
@@ -354,8 +358,8 @@ type serverConfigV12 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger loggerV7 `json:"logger"`
@@ -370,8 +374,8 @@ type serverConfigV13 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
 
 	// Additional error logging configuration.
 	Logger *loggerV7 `json:"logger"`
@@ -386,9 +390,9 @@ type serverConfigV14 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential  `json:"credential"`
-	Region     string      `json:"region"`
-	Browser    BrowserFlag `json:"browser"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
 
 	// Additional error logging configuration.
 	Logger *loggerV7 `json:"logger"`
@@ -403,9 +407,9 @@ type serverConfigV15 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential  `json:"credential"`
-	Region     string      `json:"region"`
-	Browser    BrowserFlag `json:"browser"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
 
 	// Additional error logging configuration.
 	Logger *loggerV7 `json:"logger"`
@@ -414,15 +418,36 @@ type serverConfigV15 struct {
 	Notify *notifier `json:"notify"`
 }
 
+// FileLogger is introduced to workaround the dependency about logrus
+type FileLogger struct {
+	Enable   bool   `json:"enable"`
+	Filename string `json:"filename"`
+}
+
+// ConsoleLogger is introduced to workaround the dependency about logrus
+type ConsoleLogger struct {
+	Enable bool `json:"enable"`
+}
+
+// Loggers struct is defined with FileLogger and ConsoleLogger
+// although they are removed from logging logic. They are
+// kept here just to workaround the dependency migration
+// code/logic has on them.
+type loggers struct {
+	sync.RWMutex
+	Console ConsoleLogger `json:"console"`
+	File    FileLogger    `json:"file"`
+}
+
 // serverConfigV16 server configuration version '16' which is like
 // version '15' except it makes a change to logging configuration.
 type serverConfigV16 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential  `json:"credential"`
-	Region     string      `json:"region"`
-	Browser    BrowserFlag `json:"browser"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
 
 	// Additional error logging configuration.
 	Logger *loggers `json:"logger"`
@@ -439,9 +464,9 @@ type serverConfigV17 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential  `json:"credential"`
-	Region     string      `json:"region"`
-	Browser    BrowserFlag `json:"browser"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
 
 	// Additional error logging configuration.
 	Logger *loggers `json:"logger"`
@@ -458,9 +483,9 @@ type serverConfigV18 struct {
 	Version string `json:"version"`
 
 	// S3 API configuration.
-	Credential credential  `json:"credential"`
-	Region     string      `json:"region"`
-	Browser    BrowserFlag `json:"browser"`
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
 
 	// Additional error logging configuration.
 	Logger *loggers `json:"logger"`
@@ -468,3 +493,76 @@ type serverConfigV18 struct {
 	// Notification queue configuration.
 	Notify *notifier `json:"notify"`
 }
+
+// serverConfigV19 server configuration version '19' which is like
+// version '18' except it adds support for MQTT notifications.
+type serverConfigV19 struct {
+	sync.RWMutex
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
+
+	// Additional error logging configuration.
+	Logger *loggers `json:"logger"`
+
+	// Notification queue configuration.
+	Notify *notifier `json:"notify"`
+}
+
+// serverConfigV20 server configuration version '20' which is like
+// version '19' except it adds support for VirtualHostDomain
+type serverConfigV20 struct {
+	sync.RWMutex
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
+	Domain     string           `json:"domain"`
+
+	// Additional error logging configuration.
+	Logger *loggers `json:"logger"`
+
+	// Notification queue configuration.
+	Notify *notifier `json:"notify"`
+}
+
+// serverConfigV21 is just like version '20' without logger field
+type serverConfigV21 struct {
+	sync.RWMutex
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
+	Domain     string           `json:"domain"`
+
+	// Notification queue configuration.
+	Notify *notifier `json:"notify"`
+}
+
+// serverConfigV22 is just like version '21' with added support
+// for StorageClass.
+//
+// IMPORTANT NOTE: When updating this struct make sure that
+// serverConfig.ConfigDiff() is updated as necessary.
+type serverConfigV22 struct {
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential auth.Credentials `json:"credential"`
+	Region     string           `json:"region"`
+	Browser    BrowserFlag      `json:"browser"`
+	Domain     string           `json:"domain"`
+
+	// Storage class configuration
+	StorageClass storageClassConfig `json:"storageclass"`
+
+	// Notification queue configuration.
+	Notify notifier `json:"notify"`
+}

cmd/console-logger.go

@@ -1,74 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2017 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"fmt"
-	"os"
-
-	"github.com/Sirupsen/logrus"
-)
-
-// ConsoleLogger - console logger which logs into stderr.
-type ConsoleLogger struct {
-	BaseLogTarget
-}
-
-// Fire - log entry handler.
-func (logger ConsoleLogger) Fire(entry *logrus.Entry) error {
-	if !logger.Enable {
-		return nil
-	}
-
-	msgBytes, err := logger.formatter.Format(entry)
-	if err == nil {
-		fmt.Fprintf(os.Stderr, string(msgBytes))
-	}
-
-	return err
-}
-
-// String - represents ConsoleLogger as string.
-func (logger ConsoleLogger) String() string {
-	enableStr := "disabled"
-	if logger.Enable {
-		enableStr = "enabled"
-	}
-
-	return fmt.Sprintf("console:%s", enableStr)
-}
-
-// NewConsoleLogger - return new console logger object.
-func NewConsoleLogger() (logger ConsoleLogger) {
-	logger.Enable = true
-	logger.formatter = new(logrus.TextFormatter)
-
-	return logger
-}
-
-// InitConsoleLogger - initializes console logger.
-func InitConsoleLogger(logger *ConsoleLogger) {
-	if !logger.Enable {
-		return
-	}
-
-	if logger.formatter == nil {
-		logger.formatter = new(logrus.TextFormatter)
-	}
-
-	return
-}

cmd/credential_test.go

@@ -1,100 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2017 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import "testing"
-
-func TestMustGetNewCredential(t *testing.T) {
-	cred := mustGetNewCredential()
-	if !cred.IsValid() {
-		t.Fatalf("Failed to get new valid credential")
-	}
-	if len(cred.SecretKey) != secretKeyMaxLen {
-		t.Fatalf("Invalid length %d of the secretKey credential generated, expected %d", len(cred.SecretKey), secretKeyMaxLen)
-	}
-}
-
-func TestCreateCredential(t *testing.T) {
-	cred := mustGetNewCredential()
-	testCases := []struct {
-		accessKey      string
-		secretKey      string
-		expectedResult bool
-		expectedErr    error
-	}{
-		// Access key too small (min 5 chars).
-		{"user", "pass", false, errInvalidAccessKeyLength},
-		// Long access key is ok.
-		{"user123456789012345678901234567890", "password", true, nil},
-		// Secret key too small (min 8 chars).
-		{"myuser", "pass", false, errInvalidSecretKeyLength},
-		// Long secret key is ok.
-		{"myuser", "pass1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890", true, nil},
-		{"myuser", "mypassword", true, nil},
-		{cred.AccessKey, cred.SecretKey, true, nil},
-	}
-
-	for _, testCase := range testCases {
-		cred, err := createCredential(testCase.accessKey, testCase.secretKey)
-		if testCase.expectedErr == nil {
-			if err != nil {
-				t.Fatalf("error: expected = <nil>, got = %v", err)
-			}
-		} else if err == nil {
-			t.Fatalf("error: expected = %v, got = <nil>", testCase.expectedErr)
-		} else if testCase.expectedErr.Error() != err.Error() {
-			t.Fatalf("error: expected = %v, got = %v", testCase.expectedErr, err)
-		}
-
-		if testCase.expectedResult != cred.IsValid() {
-			t.Fatalf("cred: expected: %v, got: %v", testCase.expectedResult, cred.IsValid())
-		}
-	}
-}
-
-func TestCredentialEqual(t *testing.T) {
-	cred := mustGetNewCredential()
-	testCases := []struct {
-		cred           credential
-		ccred          credential
-		expectedResult bool
-	}{
-		// Empty compare credential
-		{cred, credential{}, false},
-		// Empty credential
-		{credential{}, cred, false},
-		// Two different credentials
-		{cred, mustGetNewCredential(), false},
-		// Access key is different in compare credential.
-		{cred, credential{AccessKey: "myuser", SecretKey: cred.SecretKey}, false},
-		// Secret key is different in compare credential.
-		{cred, credential{AccessKey: cred.AccessKey, SecretKey: "mypassword"}, false},
-		// secretHashKey is missing in compare credential.
-		{cred, credential{AccessKey: cred.AccessKey, SecretKey: cred.SecretKey}, true},
-		// secretHashKey is missing in credential.
-		{credential{AccessKey: cred.AccessKey, SecretKey: cred.SecretKey}, cred, true},
-		// Same credentials.
-		{cred, cred, true},
-	}
-
-	for _, testCase := range testCases {
-		result := testCase.cred.Equal(testCase.ccred)
-		if result != testCase.expectedResult {
-			t.Fatalf("cred: expected: %v, got: %v", testCase.expectedResult, result)
-		}
-	}
-}

cmd/encryption-v1.go

@@ -0,0 +1,826 @@
+/*
+ * Minio Cloud Storage, (C) 2017, 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"bytes"
+	"crypto/hmac"
+	"crypto/md5"
+	"crypto/rand"
+	"crypto/subtle"
+	"encoding/base64"
+	"encoding/binary"
+	"errors"
+	"io"
+	"net/http"
+
+	"github.com/minio/minio/pkg/ioutil"
+	sha256 "github.com/minio/sha256-simd"
+	"github.com/minio/sio"
+)
+
+var (
+	// AWS errors for invalid SSE-C requests.
+	errInsecureSSERequest  = errors.New("Requests specifying Server Side Encryption with Customer provided keys must be made over a secure connection")
+	errEncryptedObject     = errors.New("The object was stored using a form of Server Side Encryption. The correct parameters must be provided to retrieve the object")
+	errInvalidSSEAlgorithm = errors.New("Requests specifying Server Side Encryption with Customer provided keys must provide a valid encryption algorithm")
+	errMissingSSEKey       = errors.New("Requests specifying Server Side Encryption with Customer provided keys must provide an appropriate secret key")
+	errInvalidSSEKey       = errors.New("The secret key was invalid for the specified algorithm")
+	errMissingSSEKeyMD5    = errors.New("Requests specifying Server Side Encryption with Customer provided keys must provide the client calculated MD5 of the secret key")
+	errSSEKeyMD5Mismatch   = errors.New("The calculated MD5 hash of the key did not match the hash that was provided")
+	errSSEKeyMismatch      = errors.New("The client provided key does not match the key provided when the object was encrypted") // this msg is not shown to the client
+
+	// Additional Minio errors for SSE-C requests.
+	errObjectTampered = errors.New("The requested object was modified and may be compromised")
+)
+
+const (
+	// SSECustomerAlgorithm is the AWS SSE-C algorithm HTTP header key.
+	SSECustomerAlgorithm = "X-Amz-Server-Side-Encryption-Customer-Algorithm"
+	// SSECustomerKey is the AWS SSE-C encryption key HTTP header key.
+	SSECustomerKey = "X-Amz-Server-Side-Encryption-Customer-Key"
+	// SSECustomerKeyMD5 is the AWS SSE-C encryption key MD5 HTTP header key.
+	SSECustomerKeyMD5 = "X-Amz-Server-Side-Encryption-Customer-Key-MD5"
+
+	// SSECopyCustomerAlgorithm is the AWS SSE-C algorithm HTTP header key for CopyObject API.
+	SSECopyCustomerAlgorithm = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Algorithm"
+	// SSECopyCustomerKey is the AWS SSE-C encryption key HTTP header key for CopyObject API.
+	SSECopyCustomerKey = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key"
+	// SSECopyCustomerKeyMD5 is the AWS SSE-C encryption key MD5 HTTP header key for CopyObject API.
+	SSECopyCustomerKeyMD5 = "X-Amz-Copy-Source-Server-Side-Encryption-Customer-Key-MD5"
+)
+
+const (
+	// SSECustomerKeySize is the size of valid client provided encryption keys in bytes.
+	// Currently AWS supports only AES256. So the SSE-C key size is fixed to 32 bytes.
+	SSECustomerKeySize = 32
+
+	// SSEIVSize is the size of the IV data
+	SSEIVSize = 32 // 32 bytes
+
+	// SSECustomerAlgorithmAES256 the only valid S3 SSE-C encryption algorithm identifier.
+	SSECustomerAlgorithmAES256 = "AES256"
+
+	// SSE dare package block size.
+	sseDAREPackageBlockSize = 64 * 1024 // 64KiB bytes
+
+	// SSE dare package meta padding bytes.
+	sseDAREPackageMetaSize = 32 // 32 bytes
+
+)
+
+// SSE-C key derivation, key verification and key update:
+// H: Hash function [32 = |H(m)|]
+// AE: authenticated encryption scheme, AD: authenticated decryption scheme [m = AD(k, AE(k, m))]
+//
+// Key derivation:
+// 	 Input:
+// 		key     := 32 bytes              # client provided key
+// 		Re, Rm  := 32 bytes, 32 bytes    # uniformly random
+//
+//   Seal:
+// 		k       := H(key || Re)          # object encryption key
+// 		r       := H(Rm)                 # save as object metadata [ServerSideEncryptionIV]
+//		KeK     := H(key || r)           # key encryption key
+// 		K       := AE(KeK, k)            # save as object metadata [ServerSideEncryptionSealedKey]
+// ------------------------------------------------------------------------------------------------
+// Key verification:
+// 	 Input:
+// 		key     := 32 bytes              # client provided key
+// 		r       := 32 bytes              # object metadata [ServerSideEncryptionIV]
+// 		K       := 32 bytes              # object metadata [ServerSideEncryptionSealedKey]
+//
+//   Open:
+//		KeK     := H(key || r)           # key encryption key
+//		k       := AD(Kek, K)            # object encryption key
+// -------------------------------------------------------------------------------------------------
+// Key update:
+// 	 Input:
+// 		key     := 32 bytes              # old client provided key
+// 		key'    := 32 bytes              # new client provided key
+// 		Rm      := 32 bytes              # uniformly random
+// 		r       := 32 bytes              # object metadata [ServerSideEncryptionIV]
+// 		K       := 32 bytes              # object metadata [ServerSideEncryptionSealedKey]
+//
+//   Update:
+//      1. open:
+//			KeK     := H(key || r)       # key encryption key
+//			k       := AD(Kek, K)        # object encryption key
+//      2. seal:
+//			r'      := H(Rm)			 # save as object metadata [ServerSideEncryptionIV]
+//			KeK'    := H(key' || r')	 # new key encryption key
+// 			K'      := AE(KeK', k)       # save as object metadata [ServerSideEncryptionSealedKey]
+
+const (
+	// ServerSideEncryptionIV is a 32 byte randomly generated IV used to derive an
+	// unique key encryption key from the client provided key. The combination of this value
+	// and the client-provided key MUST be unique.
+	ServerSideEncryptionIV = ReservedMetadataPrefix + "Server-Side-Encryption-Iv"
+
+	// ServerSideEncryptionSealAlgorithm identifies a combination of a cryptographic hash function and
+	// an authenticated en/decryption scheme to seal the object encryption key.
+	ServerSideEncryptionSealAlgorithm = ReservedMetadataPrefix + "Server-Side-Encryption-Seal-Algorithm"
+
+	// ServerSideEncryptionSealedKey is the sealed object encryption key. The sealed key can be decrypted
+	// by the key encryption key derived from the client provided key and the server-side-encryption IV.
+	ServerSideEncryptionSealedKey = ReservedMetadataPrefix + "Server-Side-Encryption-Sealed-Key"
+)
+
+// SSESealAlgorithmDareSha256 specifies DARE as authenticated en/decryption scheme and SHA256 as cryptographic
+// hash function.
+const SSESealAlgorithmDareSha256 = "DARE-SHA256"
+
+// hasSSECustomerHeader returns true if the given HTTP header
+// contains server-side-encryption with customer provided key fields.
+func hasSSECustomerHeader(header http.Header) bool {
+	return header.Get(SSECustomerAlgorithm) != "" || header.Get(SSECustomerKey) != "" || header.Get(SSECustomerKeyMD5) != ""
+}
+
+// hasSSECopyCustomerHeader returns true if the given HTTP header
+// contains copy source server-side-encryption with customer provided key fields.
+func hasSSECopyCustomerHeader(header http.Header) bool {
+	return header.Get(SSECopyCustomerAlgorithm) != "" || header.Get(SSECopyCustomerKey) != "" || header.Get(SSECopyCustomerKeyMD5) != ""
+}
+
+// ParseSSECopyCustomerRequest parses the SSE-C header fields of the provided request.
+// It returns the client provided key on success.
+func ParseSSECopyCustomerRequest(r *http.Request) (key []byte, err error) {
+	if !globalIsSSL { // minio only supports HTTP or HTTPS requests not both at the same time
+		// we cannot use r.TLS == nil here because Go's http implementation reflects on
+		// the net.Conn and sets the TLS field of http.Request only if it's an tls.Conn.
+		// Minio uses a BufConn (wrapping a tls.Conn) so the type check within the http package
+		// will always fail -> r.TLS is always nil even for TLS requests.
+		return nil, errInsecureSSERequest
+	}
+	header := r.Header
+	if algorithm := header.Get(SSECopyCustomerAlgorithm); algorithm != SSECustomerAlgorithmAES256 {
+		return nil, errInvalidSSEAlgorithm
+	}
+	if header.Get(SSECopyCustomerKey) == "" {
+		return nil, errMissingSSEKey
+	}
+	if header.Get(SSECopyCustomerKeyMD5) == "" {
+		return nil, errMissingSSEKeyMD5
+	}
+
+	key, err = base64.StdEncoding.DecodeString(header.Get(SSECopyCustomerKey))
+	if err != nil {
+		return nil, errInvalidSSEKey
+	}
+
+	if len(key) != SSECustomerKeySize {
+		return nil, errInvalidSSEKey
+	}
+	// Make sure we purged the keys from http headers by now.
+	header.Del(SSECopyCustomerKey)
+
+	keyMD5, err := base64.StdEncoding.DecodeString(header.Get(SSECopyCustomerKeyMD5))
+	if err != nil {
+		return nil, errSSEKeyMD5Mismatch
+	}
+	if md5Sum := md5.Sum(key); !bytes.Equal(md5Sum[:], keyMD5) {
+		return nil, errSSEKeyMD5Mismatch
+	}
+	return key, nil
+}
+
+// ParseSSECustomerRequest parses the SSE-C header fields of the provided request.
+// It returns the client provided key on success.
+func ParseSSECustomerRequest(r *http.Request) (key []byte, err error) {
+	return ParseSSECustomerHeader(r.Header)
+}
+
+// ParseSSECustomerHeader parses the SSE-C header fields and returns
+// the client provided key on success.
+func ParseSSECustomerHeader(header http.Header) (key []byte, err error) {
+	if !globalIsSSL { // minio only supports HTTP or HTTPS requests not both at the same time
+		// we cannot use r.TLS == nil here because Go's http implementation reflects on
+		// the net.Conn and sets the TLS field of http.Request only if it's an tls.Conn.
+		// Minio uses a BufConn (wrapping a tls.Conn) so the type check within the http package
+		// will always fail -> r.TLS is always nil even for TLS requests.
+		return nil, errInsecureSSERequest
+	}
+	if algorithm := header.Get(SSECustomerAlgorithm); algorithm != SSECustomerAlgorithmAES256 {
+		return nil, errInvalidSSEAlgorithm
+	}
+	if header.Get(SSECustomerKey) == "" {
+		return nil, errMissingSSEKey
+	}
+	if header.Get(SSECustomerKeyMD5) == "" {
+		return nil, errMissingSSEKeyMD5
+	}
+
+	key, err = base64.StdEncoding.DecodeString(header.Get(SSECustomerKey))
+	if err != nil {
+		return nil, errInvalidSSEKey
+	}
+
+	if len(key) != SSECustomerKeySize {
+		return nil, errInvalidSSEKey
+	}
+	// Make sure we purged the keys from http headers by now.
+	header.Del(SSECustomerKey)
+
+	keyMD5, err := base64.StdEncoding.DecodeString(header.Get(SSECustomerKeyMD5))
+	if err != nil {
+		return nil, errSSEKeyMD5Mismatch
+	}
+	if md5Sum := md5.Sum(key); !bytes.Equal(md5Sum[:], keyMD5) {
+		return nil, errSSEKeyMD5Mismatch
+	}
+	return key, nil
+}
+
+// This function rotates old to new key.
+func rotateKey(oldKey []byte, newKey []byte, metadata map[string]string) error {
+	if subtle.ConstantTimeCompare(oldKey, newKey) == 1 {
+		return nil
+	}
+	delete(metadata, SSECustomerKey) // make sure we do not save the key by accident
+
+	if metadata[ServerSideEncryptionSealAlgorithm] != SSESealAlgorithmDareSha256 { // currently DARE-SHA256 is the only option
+		return errObjectTampered
+	}
+	iv, err := base64.StdEncoding.DecodeString(metadata[ServerSideEncryptionIV])
+	if err != nil || len(iv) != SSEIVSize {
+		return errObjectTampered
+	}
+	sealedKey, err := base64.StdEncoding.DecodeString(metadata[ServerSideEncryptionSealedKey])
+	if err != nil || len(sealedKey) != 64 {
+		return errObjectTampered
+	}
+
+	sha := sha256.New() // derive key encryption key
+	sha.Write(oldKey)
+	sha.Write(iv)
+	keyEncryptionKey := sha.Sum(nil)
+
+	objectEncryptionKey := bytes.NewBuffer(nil) // decrypt object encryption key
+	n, err := sio.Decrypt(objectEncryptionKey, bytes.NewReader(sealedKey), sio.Config{
+		Key: keyEncryptionKey,
+	})
+	if n != 32 || err != nil {
+		// Either the provided key does not match or the object was tampered.
+		// To provide strict AWS S3 compatibility we return: access denied.
+		return errSSEKeyMismatch
+	}
+
+	nonce := make([]byte, 32) // generate random values for key derivation
+	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
+		return err
+	}
+
+	niv := sha256.Sum256(nonce[:]) // derive key encryption key
+	sha = sha256.New()
+	sha.Write(newKey)
+	sha.Write(niv[:])
+	keyEncryptionKey = sha.Sum(nil)
+
+	sealedKeyW := bytes.NewBuffer(nil) // sealedKey := 16 byte header + 32 byte payload + 16 byte tag
+	n, err = sio.Encrypt(sealedKeyW, bytes.NewReader(objectEncryptionKey.Bytes()), sio.Config{
+		Key: keyEncryptionKey,
+	})
+	if n != 64 || err != nil {
+		return errors.New("failed to seal object encryption key") // if this happens there's a bug in the code (may panic ?)
+	}
+
+	metadata[ServerSideEncryptionIV] = base64.StdEncoding.EncodeToString(niv[:])
+	metadata[ServerSideEncryptionSealAlgorithm] = SSESealAlgorithmDareSha256
+	metadata[ServerSideEncryptionSealedKey] = base64.StdEncoding.EncodeToString(sealedKeyW.Bytes())
+	return nil
+}
+
+func newEncryptMetadata(key []byte, metadata map[string]string) ([]byte, error) {
+	delete(metadata, SSECustomerKey) // make sure we do not save the key by accident
+
+	// security notice:
+	//  - If the first 32 bytes of the random value are ever repeated under the same client-provided
+	//    key the encrypted object will not be tamper-proof. [ P(coll) ~= 1 / 2^(256 / 2)]
+	//  - If the last 32 bytes of the random value are ever repeated under the same client-provided
+	//    key an adversary may be able to extract the object encryption key. This depends on the
+	//    authenticated en/decryption scheme. The DARE format will generate an 8 byte nonce which must
+	//    be repeated in addition to reveal the object encryption key.
+	//    [ P(coll) ~= 1 / 2^((256 + 64) / 2) ]
+	nonce := make([]byte, 32+SSEIVSize) // generate random values for key derivation
+	if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
+		return nil, err
+	}
+	sha := sha256.New() // derive object encryption key
+	sha.Write(key)
+	sha.Write(nonce[:32])
+	objectEncryptionKey := sha.Sum(nil)
+
+	iv := sha256.Sum256(nonce[32:]) // derive key encryption key
+	sha = sha256.New()
+	sha.Write(key)
+	sha.Write(iv[:])
+	keyEncryptionKey := sha.Sum(nil)
+
+	sealedKey := bytes.NewBuffer(nil) // sealedKey := 16 byte header + 32 byte payload + 16 byte tag
+	n, err := sio.Encrypt(sealedKey, bytes.NewReader(objectEncryptionKey), sio.Config{
+		Key: keyEncryptionKey,
+	})
+	if n != 64 || err != nil {
+		return nil, errors.New("failed to seal object encryption key") // if this happens there's a bug in the code (may panic ?)
+	}
+
+	metadata[ServerSideEncryptionIV] = base64.StdEncoding.EncodeToString(iv[:])
+	metadata[ServerSideEncryptionSealAlgorithm] = SSESealAlgorithmDareSha256
+	metadata[ServerSideEncryptionSealedKey] = base64.StdEncoding.EncodeToString(sealedKey.Bytes())
+
+	return objectEncryptionKey, nil
+}
+
+func newEncryptReader(content io.Reader, key []byte, metadata map[string]string) (io.Reader, error) {
+	objectEncryptionKey, err := newEncryptMetadata(key, metadata)
+	if err != nil {
+		return nil, err
+	}
+
+	reader, err := sio.EncryptReader(content, sio.Config{Key: objectEncryptionKey})
+	if err != nil {
+		return nil, errInvalidSSEKey
+	}
+
+	return reader, nil
+}
+
+// EncryptRequest takes the client provided content and encrypts the data
+// with the client provided key. It also marks the object as client-side-encrypted
+// and sets the correct headers.
+func EncryptRequest(content io.Reader, r *http.Request, metadata map[string]string) (io.Reader, error) {
+	key, err := ParseSSECustomerRequest(r)
+	if err != nil {
+		return nil, err
+	}
+	return newEncryptReader(content, key, metadata)
+}
+
+// DecryptCopyRequest decrypts the object with the client provided key. It also removes
+// the client-side-encryption metadata from the object and sets the correct headers.
+func DecryptCopyRequest(client io.Writer, r *http.Request, metadata map[string]string) (io.WriteCloser, error) {
+	key, err := ParseSSECopyCustomerRequest(r)
+	if err != nil {
+		return nil, err
+	}
+	delete(metadata, SSECopyCustomerKey) // make sure we do not save the key by accident
+	return newDecryptWriter(client, key, 0, metadata)
+}
+
+func decryptObjectInfo(key []byte, metadata map[string]string) ([]byte, error) {
+	if metadata[ServerSideEncryptionSealAlgorithm] != SSESealAlgorithmDareSha256 { // currently DARE-SHA256 is the only option
+		return nil, errObjectTampered
+	}
+	iv, err := base64.StdEncoding.DecodeString(metadata[ServerSideEncryptionIV])
+	if err != nil || len(iv) != SSEIVSize {
+		return nil, errObjectTampered
+	}
+	sealedKey, err := base64.StdEncoding.DecodeString(metadata[ServerSideEncryptionSealedKey])
+	if err != nil || len(sealedKey) != 64 {
+		return nil, errObjectTampered
+	}
+
+	sha := sha256.New() // derive key encryption key
+	sha.Write(key)
+	sha.Write(iv)
+	keyEncryptionKey := sha.Sum(nil)
+
+	objectEncryptionKey := bytes.NewBuffer(nil) // decrypt object encryption key
+	n, err := sio.Decrypt(objectEncryptionKey, bytes.NewReader(sealedKey), sio.Config{
+		Key: keyEncryptionKey,
+	})
+	if n != 32 || err != nil {
+		// Either the provided key does not match or the object was tampered.
+		// To provide strict AWS S3 compatibility we return: access denied.
+		return nil, errSSEKeyMismatch
+	}
+	return objectEncryptionKey.Bytes(), nil
+}
+
+func newDecryptWriter(client io.Writer, key []byte, seqNumber uint32, metadata map[string]string) (io.WriteCloser, error) {
+	objectEncryptionKey, err := decryptObjectInfo(key, metadata)
+	if err != nil {
+		return nil, err
+
+	}
+	return newDecryptWriterWithObjectKey(client, objectEncryptionKey, seqNumber, metadata)
+}
+
+func newDecryptWriterWithObjectKey(client io.Writer, objectEncryptionKey []byte, seqNumber uint32, metadata map[string]string) (io.WriteCloser, error) {
+	writer, err := sio.DecryptWriter(client, sio.Config{
+		Key:            objectEncryptionKey,
+		SequenceNumber: seqNumber,
+	})
+	if err != nil {
+		return nil, errInvalidSSEKey
+	}
+
+	delete(metadata, ServerSideEncryptionIV)
+	delete(metadata, ServerSideEncryptionSealAlgorithm)
+	delete(metadata, ServerSideEncryptionSealedKey)
+	delete(metadata, ReservedMetadataPrefix+"Encrypted-Multipart")
+	return writer, nil
+}
+
+// DecryptRequestWithSequenceNumber decrypts the object with the client provided key. It also removes
+// the client-side-encryption metadata from the object and sets the correct headers.
+func DecryptRequestWithSequenceNumber(client io.Writer, r *http.Request, seqNumber uint32, metadata map[string]string) (io.WriteCloser, error) {
+	key, err := ParseSSECustomerRequest(r)
+	if err != nil {
+		return nil, err
+	}
+	delete(metadata, SSECustomerKey) // make sure we do not save the key by accident
+	return newDecryptWriter(client, key, seqNumber, metadata)
+}
+
+// DecryptRequest decrypts the object with the client provided key. It also removes
+// the client-side-encryption metadata from the object and sets the correct headers.
+func DecryptRequest(client io.Writer, r *http.Request, metadata map[string]string) (io.WriteCloser, error) {
+	return DecryptRequestWithSequenceNumber(client, r, 0, metadata)
+}
+
+// DecryptBlocksWriter - decrypts multipart parts, while implementing a io.Writer compatible interface.
+type DecryptBlocksWriter struct {
+	// Original writer where the plain data will be written
+	writer io.Writer
+	// Current decrypter for the current encrypted data block
+	decrypter io.WriteCloser
+	// Start sequence number
+	startSeqNum uint32
+	// Current part index
+	partIndex int
+	// Parts information
+	parts    []objectPartInfo
+	req      *http.Request
+	metadata map[string]string
+
+	partEncRelOffset int64
+
+	copySource bool
+	// Customer Key
+	customerKeyHeader string
+}
+
+func (w *DecryptBlocksWriter) buildDecrypter(partID int) error {
+	m := make(map[string]string)
+	for k, v := range w.metadata {
+		m[k] = v
+	}
+	// Initialize the first decrypter, new decrypters will be initialized in Write() operation as needed.
+	var key []byte
+	var err error
+	if w.copySource {
+		w.req.Header.Set(SSECopyCustomerKey, w.customerKeyHeader)
+		key, err = ParseSSECopyCustomerRequest(w.req)
+	} else {
+		w.req.Header.Set(SSECustomerKey, w.customerKeyHeader)
+		key, err = ParseSSECustomerRequest(w.req)
+	}
+	if err != nil {
+		return err
+	}
+
+	objectEncryptionKey, err := decryptObjectInfo(key, m)
+	if err != nil {
+		return err
+	}
+
+	var partIDbin [4]byte
+	binary.LittleEndian.PutUint32(partIDbin[:], uint32(partID)) // marshal part ID
+
+	mac := hmac.New(sha256.New, objectEncryptionKey) // derive part encryption key from part ID and object key
+	mac.Write(partIDbin[:])
+	partEncryptionKey := mac.Sum(nil)
+
+	// make sure we do not save the key by accident
+	if w.copySource {
+		delete(m, SSECopyCustomerKey)
+	} else {
+		delete(m, SSECustomerKey)
+	}
+
+	// make sure to provide a NopCloser such that a Close
+	// on sio.decryptWriter doesn't close the underlying writer's
+	// close which perhaps can close the stream prematurely.
+	decrypter, err := newDecryptWriterWithObjectKey(ioutil.NopCloser(w.writer), partEncryptionKey, w.startSeqNum, m)
+	if err != nil {
+		return err
+	}
+
+	if w.decrypter != nil {
+		// Pro-actively close the writer such that any pending buffers
+		// are flushed already before we allocate a new decrypter.
+		err = w.decrypter.Close()
+		if err != nil {
+			return err
+		}
+	}
+
+	w.decrypter = decrypter
+	return nil
+}
+
+func (w *DecryptBlocksWriter) Write(p []byte) (int, error) {
+	var err error
+	var n1 int
+	if int64(len(p)) < w.parts[w.partIndex].Size-w.partEncRelOffset {
+		n1, err = w.decrypter.Write(p)
+		if err != nil {
+			return 0, err
+		}
+		w.partEncRelOffset += int64(n1)
+	} else {
+		n1, err = w.decrypter.Write(p[:w.parts[w.partIndex].Size-w.partEncRelOffset])
+		if err != nil {
+			return 0, err
+		}
+
+		// We should now proceed to next part, reset all values appropriately.
+		w.partEncRelOffset = 0
+		w.startSeqNum = 0
+
+		w.partIndex++
+
+		err = w.buildDecrypter(w.partIndex + 1)
+		if err != nil {
+			return 0, err
+		}
+
+		n1, err = w.decrypter.Write(p[n1:])
+		if err != nil {
+			return 0, err
+		}
+
+		w.partEncRelOffset += int64(n1)
+	}
+
+	return len(p), nil
+}
+
+// Close closes the LimitWriter. It behaves like io.Closer.
+func (w *DecryptBlocksWriter) Close() error {
+	if w.decrypter != nil {
+		err := w.decrypter.Close()
+		if err != nil {
+			return err
+		}
+	}
+
+	if closer, ok := w.writer.(io.Closer); ok {
+		return closer.Close()
+	}
+	return nil
+}
+
+// DecryptAllBlocksCopyRequest - setup a struct which can decrypt many concatenated encrypted data
+// parts information helps to know the boundaries of each encrypted data block, this function decrypts
+// all parts starting from part-1.
+func DecryptAllBlocksCopyRequest(client io.Writer, r *http.Request, objInfo ObjectInfo) (io.WriteCloser, int64, error) {
+	w, _, size, err := DecryptBlocksRequest(client, r, 0, objInfo.Size, objInfo, true)
+	return w, size, err
+}
+
+// DecryptBlocksRequest - setup a struct which can decrypt many concatenated encrypted data
+// parts information helps to know the boundaries of each encrypted data block.
+func DecryptBlocksRequest(client io.Writer, r *http.Request, startOffset, length int64, objInfo ObjectInfo, copySource bool) (io.WriteCloser, int64, int64, error) {
+	seqNumber, encStartOffset, encLength := getEncryptedStartOffset(startOffset, length)
+
+	// Encryption length cannot be bigger than the file size, if it is
+	// which is allowed in AWS S3, we simply default to EncryptedSize().
+	if encLength+encStartOffset > objInfo.EncryptedSize() {
+		encLength = objInfo.EncryptedSize() - encStartOffset
+	}
+
+	if len(objInfo.Parts) == 0 || !objInfo.IsEncryptedMultipart() {
+		var writer io.WriteCloser
+		var err error
+		if copySource {
+			writer, err = DecryptCopyRequest(client, r, objInfo.UserDefined)
+		} else {
+			writer, err = DecryptRequestWithSequenceNumber(client, r, seqNumber, objInfo.UserDefined)
+		}
+		if err != nil {
+			return nil, 0, 0, err
+		}
+		return writer, encStartOffset, encLength, nil
+	}
+
+	var partStartIndex int
+	var partStartOffset = startOffset
+	// Skip parts until final offset maps to a particular part offset.
+	for i, part := range objInfo.Parts {
+		decryptedSize, err := decryptedSize(part.Size)
+		if err != nil {
+			return nil, -1, -1, err
+		}
+
+		partStartIndex = i
+
+		// Offset is smaller than size we have reached the
+		// proper part offset, break out we start from
+		// this part index.
+		if partStartOffset < decryptedSize {
+			break
+		}
+
+		// Continue to look for next part.
+		partStartOffset -= decryptedSize
+	}
+
+	startSeqNum := partStartOffset / sseDAREPackageBlockSize
+	partEncRelOffset := int64(startSeqNum) * (sseDAREPackageBlockSize + sseDAREPackageMetaSize)
+
+	w := &DecryptBlocksWriter{
+		writer:            client,
+		startSeqNum:       uint32(startSeqNum),
+		partEncRelOffset:  partEncRelOffset,
+		parts:             objInfo.Parts,
+		partIndex:         partStartIndex,
+		req:               r,
+		customerKeyHeader: r.Header.Get(SSECustomerKey),
+		copySource:        copySource,
+	}
+
+	w.metadata = map[string]string{}
+	// Copy encryption metadata for internal use.
+	for k, v := range objInfo.UserDefined {
+		w.metadata[k] = v
+	}
+
+	// Purge all the encryption headers.
+	delete(objInfo.UserDefined, ServerSideEncryptionIV)
+	delete(objInfo.UserDefined, ServerSideEncryptionSealAlgorithm)
+	delete(objInfo.UserDefined, ServerSideEncryptionSealedKey)
+	delete(objInfo.UserDefined, ReservedMetadataPrefix+"Encrypted-Multipart")
+
+	if w.copySource {
+		w.customerKeyHeader = r.Header.Get(SSECopyCustomerKey)
+	}
+
+	if err := w.buildDecrypter(partStartIndex + 1); err != nil {
+		return nil, 0, 0, err
+	}
+
+	return w, encStartOffset, encLength, nil
+}
+
+// getEncryptedStartOffset - fetch sequence number, encrypted start offset and encrypted length.
+func getEncryptedStartOffset(offset, length int64) (seqNumber uint32, encOffset int64, encLength int64) {
+	onePkgSize := int64(sseDAREPackageBlockSize + sseDAREPackageMetaSize)
+
+	seqNumber = uint32(offset / sseDAREPackageBlockSize)
+	encOffset = int64(seqNumber) * onePkgSize
+	// The math to compute the encrypted length is always
+	// originalLength i.e (offset+length-1) to be divided under
+	// 64KiB blocks which is the payload size for each encrypted
+	// block. This is then multiplied by final package size which
+	// is basically 64KiB + 32. Finally negate the encrypted offset
+	// to get the final encrypted length on disk.
+	encLength = ((offset+length)/sseDAREPackageBlockSize)*onePkgSize - encOffset
+
+	// Check for the remainder, to figure if we need one extract package to read from.
+	if (offset+length)%sseDAREPackageBlockSize > 0 {
+		encLength += onePkgSize
+	}
+
+	return seqNumber, encOffset, encLength
+}
+
+// IsEncryptedMultipart - is the encrypted content multiparted?
+func (o *ObjectInfo) IsEncryptedMultipart() bool {
+	_, ok := o.UserDefined[ReservedMetadataPrefix+"Encrypted-Multipart"]
+	return ok
+}
+
+// IsEncrypted returns true if the object is marked as encrypted.
+func (o *ObjectInfo) IsEncrypted() bool {
+	if _, ok := o.UserDefined[ServerSideEncryptionIV]; ok {
+		return true
+	}
+	if _, ok := o.UserDefined[ServerSideEncryptionSealAlgorithm]; ok {
+		return true
+	}
+	if _, ok := o.UserDefined[ServerSideEncryptionSealedKey]; ok {
+		return true
+	}
+	return false
+}
+
+// IsEncrypted returns true if the object is marked as encrypted.
+func (li *ListPartsInfo) IsEncrypted() bool {
+	if _, ok := li.UserDefined[ServerSideEncryptionIV]; ok {
+		return true
+	}
+	if _, ok := li.UserDefined[ServerSideEncryptionSealAlgorithm]; ok {
+		return true
+	}
+	if _, ok := li.UserDefined[ServerSideEncryptionSealedKey]; ok {
+		return true
+	}
+	return false
+}
+
+func decryptedSize(encryptedSize int64) (int64, error) {
+	if encryptedSize == 0 {
+		return encryptedSize, nil
+	}
+	size := (encryptedSize / (sseDAREPackageBlockSize + sseDAREPackageMetaSize)) * sseDAREPackageBlockSize
+	if mod := encryptedSize % (sseDAREPackageBlockSize + sseDAREPackageMetaSize); mod > 0 {
+		if mod < sseDAREPackageMetaSize+1 {
+			return -1, errObjectTampered // object is not 0 size but smaller than the smallest valid encrypted object
+		}
+		size += mod - sseDAREPackageMetaSize
+	}
+	return size, nil
+}
+
+// DecryptedSize returns the size of the object after decryption in bytes.
+// It returns an error if the object is not encrypted or marked as encrypted
+// but has an invalid size.
+// DecryptedSize panics if the referred object is not encrypted.
+func (o *ObjectInfo) DecryptedSize() (int64, error) {
+	if !o.IsEncrypted() {
+		panic("cannot compute decrypted size of an object which is not encrypted")
+	}
+
+	return decryptedSize(o.Size)
+}
+
+// EncryptedSize returns the size of the object after encryption.
+// An encrypted object is always larger than a plain object
+// except for zero size objects.
+func (o *ObjectInfo) EncryptedSize() int64 {
+	size := (o.Size / sseDAREPackageBlockSize) * (sseDAREPackageBlockSize + sseDAREPackageMetaSize)
+	if mod := o.Size % (sseDAREPackageBlockSize); mod > 0 {
+		size += mod + sseDAREPackageMetaSize
+	}
+	return size
+}
+
+// DecryptCopyObjectInfo tries to decrypt the provided object if it is encrypted.
+// It fails if the object is encrypted and the HTTP headers don't contain
+// SSE-C headers or the object is not encrypted but SSE-C headers are provided. (AWS behavior)
+// DecryptObjectInfo returns 'ErrNone' if the object is not encrypted or the
+// decryption succeeded.
+//
+// DecryptCopyObjectInfo also returns whether the object is encrypted or not.
+func DecryptCopyObjectInfo(info *ObjectInfo, headers http.Header) (apiErr APIErrorCode, encrypted bool) {
+	// Directories are never encrypted.
+	if info.IsDir {
+		return ErrNone, false
+	}
+	if apiErr, encrypted = ErrNone, info.IsEncrypted(); !encrypted && hasSSECopyCustomerHeader(headers) {
+		apiErr = ErrInvalidEncryptionParameters
+	} else if encrypted {
+		if !hasSSECopyCustomerHeader(headers) {
+			apiErr = ErrSSEEncryptedObject
+			return
+		}
+		var err error
+		if info.Size, err = info.DecryptedSize(); err != nil {
+			apiErr = toAPIErrorCode(err)
+		}
+	}
+	return
+}
+
+// DecryptObjectInfo tries to decrypt the provided object if it is encrypted.
+// It fails if the object is encrypted and the HTTP headers don't contain
+// SSE-C headers or the object is not encrypted but SSE-C headers are provided. (AWS behavior)
+// DecryptObjectInfo returns 'ErrNone' if the object is not encrypted or the
+// decryption succeeded.
+//
+// DecryptObjectInfo also returns whether the object is encrypted or not.
+func DecryptObjectInfo(info *ObjectInfo, headers http.Header) (apiErr APIErrorCode, encrypted bool) {
+	// Directories are never encrypted.
+	if info.IsDir {
+		return ErrNone, false
+	}
+	if apiErr, encrypted = ErrNone, info.IsEncrypted(); !encrypted && hasSSECustomerHeader(headers) {
+		apiErr = ErrInvalidEncryptionParameters
+	} else if encrypted {
+		if !hasSSECustomerHeader(headers) {
+			apiErr = ErrSSEEncryptedObject
+			return
+		}
+		var err error
+		if info.Size, err = info.DecryptedSize(); err != nil {
+			apiErr = toAPIErrorCode(err)
+		}
+	}
+	return
+}

cmd/encryption-v1_test.go

@@ -0,0 +1,517 @@
+/*
+ * Minio Cloud Storage, (C) 2017, 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"bytes"
+	"net/http"
+	"testing"
+)
+
+var hasSSECopyCustomerHeaderTests = []struct {
+	headers    map[string]string
+	sseRequest bool
+}{
+	{headers: map[string]string{SSECopyCustomerAlgorithm: "AES256", SSECopyCustomerKey: "key", SSECopyCustomerKeyMD5: "md5"}, sseRequest: true},                    // 0
+	{headers: map[string]string{SSECopyCustomerAlgorithm: "AES256"}, sseRequest: true},                                                                             // 1
+	{headers: map[string]string{SSECopyCustomerKey: "key"}, sseRequest: true},                                                                                      // 2
+	{headers: map[string]string{SSECopyCustomerKeyMD5: "md5"}, sseRequest: true},                                                                                   // 3
+	{headers: map[string]string{}, sseRequest: false},                                                                                                              // 4
+	{headers: map[string]string{SSECopyCustomerAlgorithm + " ": "AES256", " " + SSECopyCustomerKey: "key", SSECopyCustomerKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
+	{headers: map[string]string{SSECopyCustomerAlgorithm: "", SSECopyCustomerKey: "", SSECopyCustomerKeyMD5: ""}, sseRequest: false},                               // 6
+}
+
+func TestIsSSECopyCustomerRequest(t *testing.T) {
+	for i, test := range hasSSECopyCustomerHeaderTests {
+		headers := http.Header{}
+		for k, v := range test.headers {
+			headers.Set(k, v)
+		}
+		if hasSSECopyCustomerHeader(headers) != test.sseRequest {
+			t.Errorf("Test %d: Expected hasSSECopyCustomerHeader to return %v", i, test.sseRequest)
+		}
+	}
+}
+
+var hasSSECustomerHeaderTests = []struct {
+	headers    map[string]string
+	sseRequest bool
+}{
+	{headers: map[string]string{SSECustomerAlgorithm: "AES256", SSECustomerKey: "key", SSECustomerKeyMD5: "md5"}, sseRequest: true},                    // 0
+	{headers: map[string]string{SSECustomerAlgorithm: "AES256"}, sseRequest: true},                                                                     // 1
+	{headers: map[string]string{SSECustomerKey: "key"}, sseRequest: true},                                                                              // 2
+	{headers: map[string]string{SSECustomerKeyMD5: "md5"}, sseRequest: true},                                                                           // 3
+	{headers: map[string]string{}, sseRequest: false},                                                                                                  // 4
+	{headers: map[string]string{SSECustomerAlgorithm + " ": "AES256", " " + SSECustomerKey: "key", SSECustomerKeyMD5 + " ": "md5"}, sseRequest: false}, // 5
+	{headers: map[string]string{SSECustomerAlgorithm: "", SSECustomerKey: "", SSECustomerKeyMD5: ""}, sseRequest: false},                               // 6
+}
+
+func TesthasSSECustomerHeader(t *testing.T) {
+	for i, test := range hasSSECustomerHeaderTests {
+		headers := http.Header{}
+		for k, v := range test.headers {
+			headers.Set(k, v)
+		}
+		if hasSSECustomerHeader(headers) != test.sseRequest {
+			t.Errorf("Test %d: Expected hasSSECustomerHeader to return %v", i, test.sseRequest)
+		}
+	}
+}
+
+var parseSSECustomerRequestTests = []struct {
+	headers map[string]string
+	useTLS  bool
+	err     error
+}{
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 0
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		useTLS: true, err: nil,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 1
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		useTLS: false, err: errInsecureSSERequest,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES 256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 2
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		useTLS: true, err: errInvalidSSEAlgorithm,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 3
+			SSECustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
+		},
+		useTLS: true, err: errSSEKeyMD5Mismatch,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       " jE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 4
+			SSECustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
+		},
+		useTLS: true, err: errInvalidSSEKey,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 5
+			SSECustomerKeyMD5:    " +jq/LwEOEO90YtiTuNFVw==",
+		},
+		useTLS: true, err: errSSEKeyMD5Mismatch,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 6
+			SSECustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
+		},
+		useTLS: true, err: errInvalidSSEKey,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "", // 7
+			SSECustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
+		},
+		useTLS: true, err: errMissingSSEKey,
+	},
+	{
+		headers: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 8
+			SSECustomerKeyMD5:    "",
+		},
+		useTLS: true, err: errMissingSSEKeyMD5,
+	},
+}
+
+func TestParseSSECustomerRequest(t *testing.T) {
+	defer func(flag bool) { globalIsSSL = flag }(globalIsSSL)
+	for i, test := range parseSSECustomerRequestTests {
+		headers := http.Header{}
+		for k, v := range test.headers {
+			headers.Set(k, v)
+		}
+		request := &http.Request{}
+		request.Header = headers
+		globalIsSSL = test.useTLS
+
+		_, err := ParseSSECustomerRequest(request)
+		if err != test.err {
+			t.Errorf("Test %d: Parse returned: %v want: %v", i, err, test.err)
+		}
+		key := request.Header.Get(SSECustomerKey)
+		if (err == nil || err == errSSEKeyMD5Mismatch) && key != "" {
+			t.Errorf("Test %d: Client key survived parsing - found key: %v", i, key)
+		}
+
+	}
+}
+
+var parseSSECopyCustomerRequestTests = []struct {
+	headers map[string]string
+	useTLS  bool
+	err     error
+}{
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 0
+			SSECopyCustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		useTLS: true, err: nil,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 1
+			SSECopyCustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		useTLS: false, err: errInsecureSSERequest,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES 256",
+			SSECopyCustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=", // 2
+			SSECopyCustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		useTLS: true, err: errInvalidSSEAlgorithm,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 3
+			SSECopyCustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
+		},
+		useTLS: true, err: errSSEKeyMD5Mismatch,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       " jE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 4
+			SSECopyCustomerKeyMD5:    "H+jq/LwEOEO90YtiTuNFVw==",
+		},
+		useTLS: true, err: errInvalidSSEKey,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "NjE0SL87s+ZhYtaTrg5eI5cjhCQLGPVMKenPG2bCJFw=", // 5
+			SSECopyCustomerKeyMD5:    " +jq/LwEOEO90YtiTuNFVw==",
+		},
+		useTLS: true, err: errSSEKeyMD5Mismatch,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 6
+			SSECopyCustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
+		},
+		useTLS: true, err: errInvalidSSEKey,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "", // 7
+			SSECopyCustomerKeyMD5:    "9KPgDdZNTHimuYCwnJTp5g==",
+		},
+		useTLS: true, err: errMissingSSEKey,
+	},
+	{
+		headers: map[string]string{
+			SSECopyCustomerAlgorithm: "AES256",
+			SSECopyCustomerKey:       "vFQ9ScFOF6Tu/BfzMS+rVMvlZGJHi5HmGJenJfrfKI45", // 8
+			SSECopyCustomerKeyMD5:    "",
+		},
+		useTLS: true, err: errMissingSSEKeyMD5,
+	},
+}
+
+func TestParseSSECopyCustomerRequest(t *testing.T) {
+	defer func(flag bool) { globalIsSSL = flag }(globalIsSSL)
+	for i, test := range parseSSECopyCustomerRequestTests {
+		headers := http.Header{}
+		for k, v := range test.headers {
+			headers.Set(k, v)
+		}
+		request := &http.Request{}
+		request.Header = headers
+		globalIsSSL = test.useTLS
+
+		_, err := ParseSSECopyCustomerRequest(request)
+		if err != test.err {
+			t.Errorf("Test %d: Parse returned: %v want: %v", i, err, test.err)
+		}
+		key := request.Header.Get(SSECopyCustomerKey)
+		if (err == nil || err == errSSEKeyMD5Mismatch) && key != "" {
+			t.Errorf("Test %d: Client key survived parsing - found key: %v", i, key)
+		}
+	}
+}
+
+var encryptedSizeTests = []struct {
+	size, encsize int64
+}{
+	{size: 0, encsize: 0},                                                                   // 0
+	{size: 1, encsize: 33},                                                                  // 1
+	{size: 1024, encsize: 1024 + 32},                                                        // 2
+	{size: 2 * sseDAREPackageBlockSize, encsize: 2 * (sseDAREPackageBlockSize + 32)},        // 3
+	{size: 100*sseDAREPackageBlockSize + 1, encsize: 100*(sseDAREPackageBlockSize+32) + 33}, // 4
+	{size: sseDAREPackageBlockSize + 1, encsize: (sseDAREPackageBlockSize + 32) + 33},       // 5
+	{size: 5 * 1024 * 1024 * 1024, encsize: 81920 * (sseDAREPackageBlockSize + 32)},         // 6
+}
+
+func TestEncryptedSize(t *testing.T) {
+	for i, test := range encryptedSizeTests {
+		objInfo := ObjectInfo{Size: test.size}
+		if size := objInfo.EncryptedSize(); test.encsize != size {
+			t.Errorf("Test %d: got encrypted size: #%d want: #%d", i, size, test.encsize)
+		}
+	}
+}
+
+var decryptSSECustomerObjectInfoTests = []struct {
+	encsize, size int64
+	err           error
+}{
+	{encsize: 0, size: 0, err: nil},                                                                   // 0
+	{encsize: 33, size: 1, err: nil},                                                                  // 1
+	{encsize: 1024 + 32, size: 1024, err: nil},                                                        // 2
+	{encsize: 2 * (sseDAREPackageBlockSize + 32), size: 2 * sseDAREPackageBlockSize, err: nil},        // 3
+	{encsize: 100*(sseDAREPackageBlockSize+32) + 33, size: 100*sseDAREPackageBlockSize + 1, err: nil}, // 4
+	{encsize: (sseDAREPackageBlockSize + 32) + 33, size: sseDAREPackageBlockSize + 1, err: nil},       // 5
+	{encsize: 81920 * (sseDAREPackageBlockSize + 32), size: 5 * 1024 * 1024 * 1024, err: nil},         // 6
+	{encsize: 0, size: 0, err: nil},                                                                   // 7
+	{encsize: sseDAREPackageBlockSize + 32 + 31, size: 0, err: errObjectTampered},                     // 8
+}
+
+func TestDecryptedSize(t *testing.T) {
+	for i, test := range decryptSSECustomerObjectInfoTests {
+		objInfo := ObjectInfo{Size: test.encsize}
+		objInfo.UserDefined = map[string]string{
+			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
+		}
+
+		size, err := objInfo.DecryptedSize()
+		if err != test.err || (size != test.size && err == nil) {
+			t.Errorf("Test %d: decryption returned: %v want: %v", i, err, test.err)
+		}
+		if err == nil && size != test.size {
+			t.Errorf("Test %d: got decrypted size: #%d want: #%d", i, size, test.size)
+		}
+	}
+}
+
+var encryptRequestTests = []struct {
+	header   map[string]string
+	metadata map[string]string
+}{
+	{
+		header: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		metadata: map[string]string{},
+	},
+	{
+		header: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		metadata: map[string]string{
+			SSECustomerKey: "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+		},
+	},
+}
+
+func TestEncryptRequest(t *testing.T) {
+	defer func(flag bool) { globalIsSSL = flag }(globalIsSSL)
+	globalIsSSL = true
+	for i, test := range encryptRequestTests {
+		content := bytes.NewReader(make([]byte, 64))
+		req := &http.Request{Header: http.Header{}}
+		for k, v := range test.header {
+			req.Header.Set(k, v)
+		}
+		_, err := EncryptRequest(content, req, test.metadata)
+		if err != nil {
+			t.Fatalf("Test %d: Failed to encrypt request: %v", i, err)
+		}
+		if key, ok := test.metadata[SSECustomerKey]; ok {
+			t.Errorf("Test %d: Client provided key survived in metadata - key: %s", i, key)
+		}
+		if kdf, ok := test.metadata[ServerSideEncryptionSealAlgorithm]; !ok {
+			t.Errorf("Test %d: ServerSideEncryptionKDF must be part of metadata: %v", i, kdf)
+		}
+		if iv, ok := test.metadata[ServerSideEncryptionIV]; !ok {
+			t.Errorf("Test %d: ServerSideEncryptionIV must be part of metadata: %v", i, iv)
+		}
+		if mac, ok := test.metadata[ServerSideEncryptionSealedKey]; !ok {
+			t.Errorf("Test %d: ServerSideEncryptionKeyMAC must be part of metadata: %v", i, mac)
+		}
+	}
+}
+
+var decryptRequestTests = []struct {
+	header     map[string]string
+	metadata   map[string]string
+	shouldFail bool
+}{
+	{
+		header: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "MzJieXRlc2xvbmdzZWNyZXRrZXltdXN0cHJvdmlkZWQ=",
+			SSECustomerKeyMD5:    "7PpPLAK26ONlVUGOWlusfg==",
+		},
+		metadata: map[string]string{
+			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
+			ServerSideEncryptionIV:            "7nQqotA8xgrPx6QK7Ap3GCfjKitqJSrGP7xzgErSJlw=",
+			ServerSideEncryptionSealedKey:     "EAAfAAAAAAD7v1hQq3PFRUHsItalxmrJqrOq6FwnbXNarxOOpb8jTWONPPKyM3Gfjkjyj6NCf+aB/VpHCLCTBA==",
+		},
+		shouldFail: false,
+	},
+	{
+		header: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		metadata: map[string]string{
+			ServerSideEncryptionSealAlgorithm: "HMAC-SHA3",
+			ServerSideEncryptionIV:            "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			ServerSideEncryptionSealedKey:     "SY5E9AvI2tI7/nUrUAssIGE32Hcs4rR9z/CUuPqu5N4=",
+		},
+		shouldFail: true,
+	},
+	{
+		header: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		metadata: map[string]string{
+			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
+			ServerSideEncryptionIV:            "RrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			ServerSideEncryptionSealedKey:     "SY5E9AvI2tI7/nUrUAssIGE32Hcs4rR9z/CUuPqu5N4=",
+		},
+		shouldFail: true,
+	},
+	{
+		header: map[string]string{
+			SSECustomerAlgorithm: "AES256",
+			SSECustomerKey:       "XAm0dRrJsEsyPb1UuFNezv1bl9hxuYsgUVC/MUctE2k=",
+			SSECustomerKeyMD5:    "bY4wkxQejw9mUJfo72k53A==",
+		},
+		metadata: map[string]string{
+			ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256,
+			ServerSideEncryptionIV:            "XAm0dRrJsEsyPb1UuFNezv1bl9ehxuYsgUVC/MUctE2k=",
+			ServerSideEncryptionSealedKey:     "SY5E9AvI2tI7/nUrUAssIGE32Hds4rR9z/CUuPqu5N4=",
+		},
+		shouldFail: true,
+	},
+}
+
+func TestDecryptRequest(t *testing.T) {
+	defer func(flag bool) { globalIsSSL = flag }(globalIsSSL)
+	globalIsSSL = true
+	for i, test := range decryptRequestTests {
+		client := bytes.NewBuffer(nil)
+		req := &http.Request{Header: http.Header{}}
+		for k, v := range test.header {
+			req.Header.Set(k, v)
+		}
+		_, err := DecryptRequest(client, req, test.metadata)
+		if err != nil && !test.shouldFail {
+			t.Fatalf("Test %d: Failed to encrypt request: %v", i, err)
+		}
+		if key, ok := test.metadata[SSECustomerKey]; ok {
+			t.Errorf("Test %d: Client provided key survived in metadata - key: %s", i, key)
+		}
+		if kdf, ok := test.metadata[ServerSideEncryptionSealAlgorithm]; ok && !test.shouldFail {
+			t.Errorf("Test %d: ServerSideEncryptionKDF should not be part of metadata: %v", i, kdf)
+		}
+		if iv, ok := test.metadata[ServerSideEncryptionIV]; ok && !test.shouldFail {
+			t.Errorf("Test %d: ServerSideEncryptionIV should not be part of metadata: %v", i, iv)
+		}
+		if mac, ok := test.metadata[ServerSideEncryptionSealedKey]; ok && !test.shouldFail {
+			t.Errorf("Test %d: ServerSideEncryptionKeyMAC should not be part of metadata: %v", i, mac)
+		}
+	}
+}
+
+var decryptObjectInfoTests = []struct {
+	info    ObjectInfo
+	headers http.Header
+	expErr  APIErrorCode
+}{
+	{
+		info:    ObjectInfo{Size: 100},
+		headers: http.Header{},
+		expErr:  ErrNone,
+	},
+	{
+		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
+		expErr:  ErrNone,
+	},
+	{
+		info:    ObjectInfo{Size: 0, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
+		expErr:  ErrNone,
+	},
+	{
+		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{},
+		expErr:  ErrSSEEncryptedObject,
+	},
+	{
+		info:    ObjectInfo{Size: 100, UserDefined: map[string]string{}},
+		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
+		expErr:  ErrInvalidEncryptionParameters,
+	},
+	{
+		info:    ObjectInfo{Size: 31, UserDefined: map[string]string{ServerSideEncryptionSealAlgorithm: SSESealAlgorithmDareSha256}},
+		headers: http.Header{SSECustomerAlgorithm: []string{SSECustomerAlgorithmAES256}},
+		expErr:  ErrObjectTampered,
+	},
+}
+
+func TestDecryptObjectInfo(t *testing.T) {
+	for i, test := range decryptObjectInfoTests {
+		if err, encrypted := DecryptObjectInfo(&test.info, test.headers); err != test.expErr {
+			t.Errorf("Test %d: Decryption returned wrong error code: got %d , want %d", i, err, test.expErr)
+		} else if enc := test.info.IsEncrypted(); encrypted && enc != encrypted {
+			t.Errorf("Test %d: Decryption thinks object is encrypted but it is not", i)
+		} else if !encrypted && enc != encrypted {
+			t.Errorf("Test %d: Decryption thinks object is not encrypted but it is", i)
+		}
+	}
+}

cmd/endpoint-ellipses.go

@@ -0,0 +1,251 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/minio/minio-go/pkg/set"
+	"github.com/minio/minio/pkg/ellipses"
+)
+
+// This file implements and supports ellipses pattern for
+// `minio server` command line arguments.
+
+// Maximum number of unique args supported on the command line.
+const (
+	serverCommandLineArgsMax = 32
+)
+
+// Endpoint set represents parsed ellipses values, also provides
+// methods to get the sets of endpoints.
+type endpointSet struct {
+	argPatterns []ellipses.ArgPattern
+	endpoints   []string   // Endpoints saved from previous GetEndpoints().
+	setIndexes  [][]uint64 // All the sets.
+}
+
+// Supported set sizes this is used to find the optimal
+// single set size.
+var setSizes = []uint64{4, 6, 8, 10, 12, 14, 16}
+
+// getDivisibleSize - returns a greatest common divisor of
+// all the ellipses sizes.
+func getDivisibleSize(totalSizes []uint64) (result uint64) {
+	gcd := func(x, y uint64) uint64 {
+		for y != 0 {
+			x, y = y, x%y
+		}
+		return x
+	}
+	result = totalSizes[0]
+	for i := 1; i < len(totalSizes); i++ {
+		result = gcd(result, totalSizes[i])
+	}
+	return result
+}
+
+// getSetIndexes returns list of indexes which provides the set size
+// on each index, this function also determines the final set size
+// The final set size has the affinity towards choosing smaller
+// indexes (total sets)
+func getSetIndexes(args []string, totalSizes []uint64) (setIndexes [][]uint64, err error) {
+	if len(totalSizes) == 0 || len(args) == 0 {
+		return nil, errInvalidArgument
+	}
+
+	setIndexes = make([][]uint64, len(totalSizes))
+	for i, totalSize := range totalSizes {
+		// Check if totalSize has minimum range upto setSize
+		if totalSize < setSizes[0] {
+			return nil, fmt.Errorf("Invalid inputs (%s). Ellipses range or number of args %d should be atleast divisible by least possible set size %d",
+				args[i], totalSize, setSizes[0])
+		}
+	}
+
+	var setSize uint64
+
+	commonSize := getDivisibleSize(totalSizes)
+	if commonSize > setSizes[len(setSizes)-1] {
+		prevD := commonSize / setSizes[0]
+		for _, i := range setSizes {
+			if commonSize%i == 0 {
+				d := commonSize / i
+				if d <= prevD {
+					prevD = d
+					setSize = i
+				}
+			}
+		}
+	} else {
+		setSize = commonSize
+	}
+
+	// isValidSetSize - checks whether given count is a valid set size for erasure coding.
+	isValidSetSize := func(count uint64) bool {
+		return (count >= setSizes[0] && count <= setSizes[len(setSizes)-1] && count%2 == 0)
+	}
+
+	// Check whether setSize is with the supported range.
+	if !isValidSetSize(setSize) {
+		return nil, fmt.Errorf("Invalid inputs (%s). Ellipses range or number of args %d should be atleast divisible by least possible set size %d",
+			args, setSize, setSizes[0])
+	}
+
+	for i := range totalSizes {
+		for j := uint64(0); j < totalSizes[i]/setSize; j++ {
+			setIndexes[i] = append(setIndexes[i], setSize)
+		}
+	}
+
+	return setIndexes, nil
+}
+
+// Returns all the expanded endpoints, each argument is expanded separately.
+func (s endpointSet) getEndpoints() (endpoints []string) {
+	if len(s.endpoints) != 0 {
+		return s.endpoints
+	}
+	for _, argPattern := range s.argPatterns {
+		for _, lbls := range argPattern.Expand() {
+			endpoints = append(endpoints, strings.Join(lbls, ""))
+		}
+	}
+	s.endpoints = endpoints
+	return endpoints
+}
+
+// Get returns the sets representation of the endpoints
+// this function also intelligently decides on what will
+// be the right set size etc.
+func (s endpointSet) Get() (sets [][]string) {
+	var k = uint64(0)
+	endpoints := s.getEndpoints()
+	for i := range s.setIndexes {
+		for j := range s.setIndexes[i] {
+			sets = append(sets, endpoints[k:s.setIndexes[i][j]+k])
+			k = s.setIndexes[i][j] + k
+		}
+	}
+
+	return sets
+}
+
+// Return the total size for each argument patterns.
+func getTotalSizes(argPatterns []ellipses.ArgPattern) []uint64 {
+	var totalSizes []uint64
+	for _, argPattern := range argPatterns {
+		var totalSize uint64 = 1
+		for _, p := range argPattern {
+			totalSize = totalSize * uint64(len(p.Seq))
+		}
+		totalSizes = append(totalSizes, totalSize)
+	}
+	return totalSizes
+}
+
+// Parses all arguments and returns an endpointSet which is a collection
+// of endpoints following the ellipses pattern, this is what is used
+// by the object layer for initializing itself.
+func parseEndpointSet(args ...string) (ep endpointSet, err error) {
+	var argPatterns = make([]ellipses.ArgPattern, len(args))
+	for i, arg := range args {
+		patterns, perr := ellipses.FindEllipsesPatterns(arg)
+		if perr != nil {
+			return endpointSet{}, perr
+		}
+		argPatterns[i] = patterns
+	}
+
+	ep.setIndexes, err = getSetIndexes(args, getTotalSizes(argPatterns))
+	if err != nil {
+		return endpointSet{}, err
+	}
+
+	ep.argPatterns = argPatterns
+
+	return ep, nil
+}
+
+// Parses all ellipses input arguments, expands them into corresponding
+// list of endpoints chunked evenly in accordance with a specific
+// set size.
+// For example: {1...64} is divided into 4 sets each of size 16.
+// This applies to even distributed setup syntax as well.
+func getAllSets(args ...string) ([][]string, error) {
+	if len(args) == 0 {
+		return nil, errInvalidArgument
+	}
+
+	var setArgs [][]string
+	if !ellipses.HasEllipses(args...) {
+		var setIndexes [][]uint64
+		// Check if we have more one args.
+		if len(args) > 1 {
+			var err error
+			setIndexes, err = getSetIndexes(args, []uint64{uint64(len(args))})
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			// We are in FS setup, proceed forward.
+			setIndexes = [][]uint64{{uint64(len(args))}}
+		}
+		s := endpointSet{
+			endpoints:  args,
+			setIndexes: setIndexes,
+		}
+		setArgs = s.Get()
+	} else {
+		s, err := parseEndpointSet(args...)
+		if err != nil {
+			return nil, err
+		}
+		setArgs = s.Get()
+	}
+
+	uniqueArgs := set.NewStringSet()
+	for _, sargs := range setArgs {
+		for _, arg := range sargs {
+			if uniqueArgs.Contains(arg) {
+				return nil, fmt.Errorf("Input args (%s) has duplicate ellipses", args)
+			}
+			uniqueArgs.Add(arg)
+		}
+	}
+
+	return setArgs, nil
+}
+
+// CreateServerEndpoints - validates and creates new endpoints from input args, supports
+// both ellipses and without ellipses transparently.
+func createServerEndpoints(serverAddr string, args ...string) (string, EndpointList, SetupType, int, int, error) {
+	setArgs, err := getAllSets(args...)
+	if err != nil {
+		return serverAddr, nil, -1, 0, 0, err
+	}
+
+	var endpoints EndpointList
+	var setupType SetupType
+	serverAddr, endpoints, setupType, err = CreateEndpoints(serverAddr, setArgs...)
+	if err != nil {
+		return serverAddr, nil, -1, 0, 0, err
+	}
+
+	return serverAddr, endpoints, setupType, len(setArgs), len(setArgs[0]), nil
+}

cmd/endpoint-ellipses_test.go

@@ -0,0 +1,388 @@
+/*
+ * Minio Cloud Storage, (C) 2018 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+
+	"github.com/minio/minio/pkg/ellipses"
+)
+
+// Tests create endpoints with ellipses and without.
+func TestCreateServerEndpoints(t *testing.T) {
+	testCases := []struct {
+		serverAddr string
+		args       []string
+		success    bool
+	}{
+		// Invalid input.
+		{"", []string{}, false},
+		// Range cannot be negative.
+		{":9000", []string{"/export1{-1...1}"}, false},
+		// Range cannot start bigger than end.
+		{":9000", []string{"/export1{64...1}"}, false},
+		// Range can only be numeric.
+		{":9000", []string{"/export1{a...z}"}, false},
+		// Duplicate disks not allowed.
+		{":9000", []string{"/export1{1...32}", "/export1{1...32}"}, false},
+		// Same host cannot export same disk on two ports - special case localhost.
+		{":9001", []string{"http://localhost:900{1...2}/export{1...64}"}, false},
+
+		// Valid inputs.
+		{":9000", []string{"/export1"}, true},
+		{":9000", []string{"/export1", "/export2", "/export3", "/export4"}, true},
+		{":9000", []string{"/export1{1...64}"}, true},
+		{":9000", []string{"/export1{01...64}"}, true},
+		{":9000", []string{"/export1{1...32}", "/export1{33...64}"}, true},
+		{":9001", []string{"http://localhost:9001/export{1...64}"}, true},
+		{":9001", []string{"http://localhost:9001/export{01...64}"}, true},
+	}
+
+	for i, testCase := range testCases {
+		_, _, _, _, _, err := createServerEndpoints(testCase.serverAddr, testCase.args...)
+		if err != nil && testCase.success {
+			t.Errorf("Test %d: Expected success but failed instead %s", i+1, err)
+		}
+		if err == nil && !testCase.success {
+			t.Errorf("Test %d: Expected failure but passed instead", i+1)
+		}
+	}
+}
+
+// Test tests calculating set indexes.
+func TestGetSetIndexes(t *testing.T) {
+	testCases := []struct {
+		args       []string
+		totalSizes []uint64
+		indexes    [][]uint64
+		success    bool
+	}{
+		// Invalid inputs.
+		{
+			[]string{"data{1...27}"},
+			[]uint64{27},
+			nil,
+			false,
+		},
+		// Valid inputs.
+		{
+			[]string{"data{1...64}"},
+			[]uint64{64},
+			[][]uint64{{16, 16, 16, 16}},
+			true,
+		},
+		{
+			[]string{"data{1...24}"},
+			[]uint64{24},
+			[][]uint64{{12, 12}},
+			true,
+		},
+		{
+			[]string{"data/controller{1...11}/export{1...8}"},
+			[]uint64{88},
+			[][]uint64{{8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8}},
+			true,
+		},
+		{
+			[]string{"data{1...4}"},
+			[]uint64{4},
+			[][]uint64{{4}},
+			true,
+		},
+	}
+
+	for i, testCase := range testCases {
+		t.Run(fmt.Sprintf("Test%d", i+1), func(t *testing.T) {
+			gotIndexes, err := getSetIndexes(testCase.args, testCase.totalSizes)
+			if err != nil && testCase.success {
+				t.Errorf("Expected success but failed instead %s", err)
+			}
+			if err == nil && !testCase.success {
+				t.Errorf("Expected failure but passed instead")
+			}
+			if !reflect.DeepEqual(testCase.indexes, gotIndexes) {
+				t.Errorf("Expected %v, got %v", testCase.indexes, gotIndexes)
+			}
+		})
+	}
+}
+
+func getSequences(start int, number int, paddinglen int) (seq []string) {
+	for i := start; i <= number; i++ {
+		if paddinglen == 0 {
+			seq = append(seq, fmt.Sprintf("%d", i))
+		} else {
+			seq = append(seq, fmt.Sprintf(fmt.Sprintf("%%0%dd", paddinglen), i))
+		}
+	}
+	return seq
+}
+
+// Test tests parses endpoint ellipses input pattern.
+func TestParseEndpointSet(t *testing.T) {
+	testCases := []struct {
+		arg     string
+		es      endpointSet
+		success bool
+	}{
+		// Tests invalid inputs.
+		{
+			"...",
+			endpointSet{},
+			false,
+		},
+		// Indivisible range.
+		{
+			"{1...27}",
+			endpointSet{},
+			false,
+		},
+		// No range specified.
+		{
+			"{...}",
+			endpointSet{},
+			false,
+		},
+		// Invalid range.
+		{
+			"http://minio{2...3}/export/set{1...0}",
+			endpointSet{},
+			false,
+		},
+		// Range cannot be smaller than 4 minimum.
+		{
+			"/export{1..2}",
+			endpointSet{},
+			false,
+		},
+		// Unsupported characters.
+		{
+			"/export/test{1...2O}",
+			endpointSet{},
+			false,
+		},
+		// Tests valid inputs.
+		{
+			"/export/set{1...64}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"/export/set",
+							"",
+							getSequences(1, 64, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16, 16, 16}},
+			},
+			true,
+		},
+		// Valid input for distributed setup.
+		{
+			"http://minio{2...3}/export/set{1...64}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"",
+							"",
+							getSequences(1, 64, 0),
+						},
+						{
+							"http://minio",
+							"/export/set",
+							getSequences(2, 3, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16, 16, 16, 16, 16, 16, 16}},
+			},
+			true,
+		},
+		// Supporting some advanced cases.
+		{
+			"http://minio{1...64}.mydomain.net/data",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"http://minio",
+							".mydomain.net/data",
+							getSequences(1, 64, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16, 16, 16}},
+			},
+			true,
+		},
+		{
+			"http://rack{1...4}.mydomain.minio{1...16}/data",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"",
+							"/data",
+							getSequences(1, 16, 0),
+						},
+						{
+							"http://rack",
+							".mydomain.minio",
+							getSequences(1, 4, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16, 16, 16}},
+			},
+			true,
+		},
+		// Supporting kubernetes cases.
+		{
+			"http://minio{0...15}.mydomain.net/data{0...1}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"",
+							"",
+							getSequences(0, 1, 0),
+						},
+						{
+							"http://minio",
+							".mydomain.net/data",
+							getSequences(0, 15, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16}},
+			},
+			true,
+		},
+		// No host regex, just disks.
+		{
+			"http://server1/data{1...32}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"http://server1/data",
+							"",
+							getSequences(1, 32, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16}},
+			},
+			true,
+		},
+		// No host regex, just disks with two position numerics.
+		{
+			"http://server1/data{01...32}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"http://server1/data",
+							"",
+							getSequences(1, 32, 2),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16}},
+			},
+			true,
+		},
+		// More than 2 ellipses are supported as well.
+		{
+			"http://minio{2...3}/export/set{1...64}/test{1...2}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"",
+							"",
+							getSequences(1, 2, 0),
+						},
+						{
+							"",
+							"/test",
+							getSequences(1, 64, 0),
+						},
+						{
+							"http://minio",
+							"/export/set",
+							getSequences(2, 3, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{16, 16, 16, 16, 16, 16, 16, 16,
+					16, 16, 16, 16, 16, 16, 16, 16}},
+			},
+			true,
+		},
+		// More than 1 ellipses per argument for standalone setup.
+		{
+			"/export{1...10}/disk{1...10}",
+			endpointSet{
+				[]ellipses.ArgPattern{
+					[]ellipses.Pattern{
+						{
+							"",
+							"",
+							getSequences(1, 10, 0),
+						},
+						{
+							"/export",
+							"/disk",
+							getSequences(1, 10, 0),
+						},
+					},
+				},
+				nil,
+				[][]uint64{{10, 10, 10, 10, 10, 10, 10, 10, 10, 10}},
+			},
+			true,
+		},
+	}
+
+	for i, testCase := range testCases {
+		t.Run(fmt.Sprintf("Test%d", i+1), func(t *testing.T) {
+			gotEs, err := parseEndpointSet(testCase.arg)
+			if err != nil && testCase.success {
+				t.Errorf("Expected success but failed instead %s", err)
+			}
+			if err == nil && !testCase.success {
+				t.Errorf("Expected failure but passed instead")
+			}
+			if !reflect.DeepEqual(testCase.es, gotEs) {
+				t.Errorf("Expected %v, got %v", testCase.es, gotEs)
+			}
+		})
+	}
+}

cmd/endpoint.go

@@ -22,7 +22,7 @@ import (
 	"net/url"
 	"path"
 	"path/filepath"
-	"sort"
+	"runtime"
 	"strconv"
 	"strings"
 
@@ -44,7 +44,8 @@ const (
 // Endpoint - any type of endpoint.
 type Endpoint struct {
 	*url.URL
-	IsLocal bool
+	IsLocal  bool
+	SetIndex int
 }
 
 func (endpoint Endpoint) String() string {
@@ -64,18 +65,9 @@ func (endpoint Endpoint) Type() EndpointType {
 	return URLEndpointType
 }
 
-// SetHTTPS - sets secure http for URLEndpointType.
-func (endpoint Endpoint) SetHTTPS() {
-	if endpoint.Host != "" {
-		endpoint.Scheme = "https"
-	}
-}
-
-// SetHTTP - sets insecure http for URLEndpointType.
-func (endpoint Endpoint) SetHTTP() {
-	if endpoint.Host != "" {
-		endpoint.Scheme = "http"
-	}
+// IsHTTPS - returns true if secure for URLEndpointType.
+func (endpoint Endpoint) IsHTTPS() bool {
+	return endpoint.Scheme == "https"
 }
 
 // NewEndpoint - returns new endpoint based on given arguments.
@@ -130,6 +122,26 @@ func NewEndpoint(arg string) (ep Endpoint, e error) {
 			return ep, fmt.Errorf("empty or root path is not supported in URL endpoint")
 		}
 
+		// On windows having a preceding "/" will cause problems, if the
+		// command line already has C:/<export-folder/ in it. Final resulting
+		// path on windows might become C:/C:/ this will cause problems
+		// of starting minio server properly in distributed mode on windows.
+		// As a special case make sure to trim the separator.
+
+		// NOTE: It is also perfectly fine for windows users to have a path
+		// without C:/ since at that point we treat it as relative path
+		// and obtain the full filesystem path as well. Providing C:/
+		// style is necessary to provide paths other than C:/,
+		// such as F:/, D:/ etc.
+		//
+		// Another additional benefit here is that this style also
+		// supports providing \\host\share support as well.
+		if runtime.GOOS == globalWindowsOSName {
+			if filepath.VolumeName(u.Path[1:]) != "" {
+				u.Path = u.Path[1:]
+			}
+		}
+
 		isLocal, err = isLocalHost(host)
 		if err != nil {
 			return ep, err
@@ -154,47 +166,22 @@ func NewEndpoint(arg string) (ep Endpoint, e error) {
 // EndpointList - list of same type of endpoint.
 type EndpointList []Endpoint
 
-// Swap - helper method for sorting.
-func (endpoints EndpointList) Swap(i, j int) {
-	endpoints[i], endpoints[j] = endpoints[j], endpoints[i]
+// IsHTTPS - returns true if secure for URLEndpointType.
+func (endpoints EndpointList) IsHTTPS() bool {
+	return endpoints[0].IsHTTPS()
 }
 
-// Len - helper method for sorting.
-func (endpoints EndpointList) Len() int {
-	return len(endpoints)
-}
-
-// Less - helper method for sorting.
-func (endpoints EndpointList) Less(i, j int) bool {
-	return endpoints[i].String() < endpoints[j].String()
-}
-
-// SetHTTPS - sets secure http for URLEndpointType.
-func (endpoints EndpointList) SetHTTPS() {
-	for i := range endpoints {
-		endpoints[i].SetHTTPS()
-	}
-}
-
-// SetHTTP - sets insecure http for URLEndpointType.
-func (endpoints EndpointList) SetHTTP() {
-	for i := range endpoints {
-		endpoints[i].SetHTTP()
+// GetString - returns endpoint string of i-th endpoint (0-based),
+// and empty string for invalid indexes.
+func (endpoints EndpointList) GetString(i int) string {
+	if i < 0 || i >= len(endpoints) {
+		return ""
 	}
+	return endpoints[i].String()
 }
 
 // NewEndpointList - returns new endpoint list based on input args.
 func NewEndpointList(args ...string) (endpoints EndpointList, err error) {
-	// isValidDistribution - checks whether given count is a valid distribution for erasure coding.
-	isValidDistribution := func(count int) bool {
-		return (count >= minErasureBlocks && count <= maxErasureBlocks && count%2 == 0)
-	}
-
-	// Check whether no. of args are valid for XL distribution.
-	if !isValidDistribution(len(args)) {
-		return nil, fmt.Errorf("A total of %d endpoints were found. For erasure mode it should be an even number between %d and %d", len(args), minErasureBlocks, maxErasureBlocks)
-	}
-
 	var endpointType EndpointType
 	var scheme string
 
@@ -224,8 +211,6 @@ func NewEndpointList(args ...string) (endpoints EndpointList, err error) {
 		endpoints = append(endpoints, endpoint)
 	}
 
-	sort.Sort(endpoints)
-
 	return endpoints, nil
 }
 
@@ -246,7 +231,7 @@ func checkCrossDeviceMounts(endpoints EndpointList) (err error) {
 }
 
 // CreateEndpoints - validates and creates new endpoints for given args.
-func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, SetupType, error) {
+func CreateEndpoints(serverAddr string, args ...[]string) (string, EndpointList, SetupType, error) {
 	var endpoints EndpointList
 	var setupType SetupType
 	var err error
@@ -259,9 +244,9 @@ func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, S
 	_, serverAddrPort := mustSplitHostPort(serverAddr)
 
 	// For single arg, return FS setup.
-	if len(args) == 1 {
+	if len(args) == 1 && len(args[0]) == 1 {
 		var endpoint Endpoint
-		endpoint, err = NewEndpoint(args[0])
+		endpoint, err = NewEndpoint(args[0][0])
 		if err != nil {
 			return serverAddr, endpoints, setupType, err
 		}
@@ -278,14 +263,25 @@ func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, S
 		return serverAddr, endpoints, setupType, nil
 	}
 
-	// Convert args to endpoints
-	if endpoints, err = NewEndpointList(args...); err != nil {
-		return serverAddr, endpoints, setupType, err
-	}
+	for i, iargs := range args {
+		var newEndpoints EndpointList
+		// Convert args to endpoints
+		var eps EndpointList
+		eps, err = NewEndpointList(iargs...)
+		if err != nil {
+			return serverAddr, endpoints, setupType, err
+		}
 
-	// Check for cross device mounts if any.
-	if err = checkCrossDeviceMounts(endpoints); err != nil {
-		return serverAddr, endpoints, setupType, err
+		// Check for cross device mounts if any.
+		if err = checkCrossDeviceMounts(eps); err != nil {
+			return serverAddr, endpoints, setupType, err
+		}
+
+		for _, ep := range eps {
+			ep.SetIndex = i
+			newEndpoints = append(newEndpoints, ep)
+		}
+		endpoints = append(endpoints, newEndpoints...)
 	}
 
 	// Return XL setup when all endpoints are path style.
@@ -322,7 +318,7 @@ func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, S
 		return serverAddr, endpoints, setupType, fmt.Errorf("no endpoint found for this host")
 	}
 
-	// Check whether same path is not used in endpoints of a host.
+	// Check whether same path is not used in endpoints of a host on different port.
 	{
 		pathIPMap := make(map[string]set.StringSet)
 		for _, endpoint := range endpoints {
@@ -337,7 +333,6 @@ func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, S
 					err = fmt.Errorf("path '%s' can not be served by different port on same address", endpoint.Path)
 					return serverAddr, endpoints, setupType, err
 				}
-
 				pathIPMap[endpoint.Path] = IPSet.Union(hostIPSet)
 			} else {
 				pathIPMap[endpoint.Path] = hostIPSet
@@ -345,6 +340,21 @@ func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, S
 		}
 	}
 
+	// Check whether same path is used for more than 1 local endpoints.
+	{
+		localPathSet := set.CreateStringSet()
+		for _, endpoint := range endpoints {
+			if !endpoint.IsLocal {
+				continue
+			}
+			if localPathSet.Contains(endpoint.Path) {
+				err = fmt.Errorf("path '%s' cannot be served by different address on same server", endpoint.Path)
+				return serverAddr, endpoints, setupType, err
+			}
+			localPathSet.Add(endpoint.Path)
+		}
+	}
+
 	// Check whether serverAddrPort matches at least in one of port used in local endpoints.
 	{
 		if !localPortSet.Contains(serverAddrPort) {
@@ -415,6 +425,23 @@ func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, S
 		}
 	}
 
+	uniqueArgs := set.NewStringSet()
+	for _, endpoint := range endpoints {
+		uniqueArgs.Add(endpoint.Host)
+	}
+
+	// Error out if we have more than serverCommandLineArgsMax unique servers.
+	if len(uniqueArgs.ToSlice()) > serverCommandLineArgsMax {
+		err := fmt.Errorf("Unsupported number of endpoints (%s), total number of servers cannot be more than %d", endpoints, serverCommandLineArgsMax)
+		return serverAddr, endpoints, setupType, err
+	}
+
+	// Error out if we have less than 2 unique servers.
+	if len(uniqueArgs.ToSlice()) < 2 && setupType == DistXLSetupType {
+		err := fmt.Errorf("Unsupported number of endpoints (%s), minimum number of servers cannot be less than 2 in distributed setup", endpoints)
+		return serverAddr, endpoints, setupType, err
+	}
+
 	setupType = DistXLSetupType
 	return serverAddr, endpoints, setupType, nil
 }

cmd/endpoint_test.go

@@ -20,7 +20,6 @@ import (
 	"fmt"
 	"net/url"
 	"reflect"
-	"sort"
 	"strings"
 	"testing"
 )
@@ -108,7 +107,6 @@ func TestNewEndpointList(t *testing.T) {
 		{[]string{"d1", "d2", "d3", "d1"}, fmt.Errorf("duplicate endpoints found")},
 		{[]string{"d1", "d2", "d3", "./d1"}, fmt.Errorf("duplicate endpoints found")},
 		{[]string{"http://localhost/d1", "http://localhost/d2", "http://localhost/d1", "http://localhost/d4"}, fmt.Errorf("duplicate endpoints found")},
-		{[]string{"d1", "d2", "d3", "d4", "d5"}, fmt.Errorf("A total of 5 endpoints were found. For erasure mode it should be an even number between 4 and 16")},
 		{[]string{"ftp://server/d1", "http://server/d2", "http://server/d3", "http://server/d4"}, fmt.Errorf("'ftp://server/d1': invalid URL endpoint format")},
 		{[]string{"d1", "http://localhost/d2", "d3", "d4"}, fmt.Errorf("mixed style endpoints are not supported")},
 		{[]string{"http://example.org/d1", "https://example.com/d1", "http://example.net/d1", "https://example.edut/d1"}, fmt.Errorf("mixed scheme is not supported")},
@@ -142,7 +140,6 @@ func TestCreateEndpoints(t *testing.T) {
 	getExpectedEndpoints := func(args []string, prefix string) ([]*url.URL, []bool) {
 		var URLs []*url.URL
 		var localFlags []bool
-		sort.Strings(args)
 		for _, arg := range args {
 			u, _ := url.Parse(arg)
 			URLs = append(URLs, u)
@@ -157,8 +154,8 @@ func TestCreateEndpoints(t *testing.T) {
 	args := []string{
 		"http://" + nonLoopBackIP + ":10000/d1",
 		"http://" + nonLoopBackIP + ":10000/d2",
-		"http://example.com:10000/d4",
 		"http://example.org:10000/d3",
+		"http://example.com:10000/d4",
 	}
 	case1URLs, case1LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":10000/")
 
@@ -167,26 +164,26 @@ func TestCreateEndpoints(t *testing.T) {
 	args = []string{
 		"http://" + nonLoopBackIP + ":10000/d1",
 		"http://" + nonLoopBackIP + ":9000/d2",
-		"http://example.com:10000/d4",
 		"http://example.org:10000/d3",
+		"http://example.com:10000/d4",
 	}
 	case2URLs, case2LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":10000/")
 
 	case3Endpoint1 := "http://" + nonLoopBackIP + "/d1"
 	args = []string{
 		"http://" + nonLoopBackIP + ":80/d1",
+		"http://example.org:9000/d2",
 		"http://example.com:80/d3",
 		"http://example.net:80/d4",
-		"http://example.org:9000/d2",
 	}
 	case3URLs, case3LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":80/")
 
 	case4Endpoint1 := "http://" + nonLoopBackIP + "/d1"
 	args = []string{
 		"http://" + nonLoopBackIP + ":9000/d1",
+		"http://example.org:9000/d2",
 		"http://example.com:9000/d3",
 		"http://example.net:9000/d4",
-		"http://example.org:9000/d2",
 	}
 	case4URLs, case4LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":9000/")
 
@@ -213,29 +210,29 @@ func TestCreateEndpoints(t *testing.T) {
 
 	testCases := []struct {
 		serverAddr         string
-		args               []string
+		args               [][]string
 		expectedServerAddr string
 		expectedEndpoints  EndpointList
 		expectedSetupType  SetupType
 		expectedErr        error
 	}{
-		{"localhost", []string{}, "", EndpointList{}, -1, fmt.Errorf("address localhost: missing port in address")},
+		{"localhost", [][]string{}, "", EndpointList{}, -1, fmt.Errorf("address localhost: missing port in address")},
 
 		// FS Setup
-		{"localhost:9000", []string{"http://localhost/d1"}, "", EndpointList{}, -1, fmt.Errorf("use path style endpoint for FS setup")},
-		{":443", []string{"d1"}, ":443", EndpointList{Endpoint{URL: &url.URL{Path: "d1"}, IsLocal: true}}, FSSetupType, nil},
-		{"localhost:10000", []string{"/d1"}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: "/d1"}, IsLocal: true}}, FSSetupType, nil},
-		{"localhost:10000", []string{"./d1"}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: "d1"}, IsLocal: true}}, FSSetupType, nil},
-		{"localhost:10000", []string{`\d1`}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: `\d1`}, IsLocal: true}}, FSSetupType, nil},
-		{"localhost:10000", []string{`.\d1`}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: `.\d1`}, IsLocal: true}}, FSSetupType, nil},
-		{":8080", []string{"https://example.org/d1", "https://example.org/d2", "https://example.org/d3", "https://example.org/d4"}, "", EndpointList{}, -1, fmt.Errorf("no endpoint found for this host")},
-		{":8080", []string{"https://example.org/d1", "https://example.com/d2", "https://example.net:8000/d3", "https://example.edu/d1"}, "", EndpointList{}, -1, fmt.Errorf("no endpoint found for this host")},
-		{"localhost:9000", []string{"https://127.0.0.1:9000/d1", "https://localhost:9001/d1", "https://example.com/d1", "https://example.com/d2"}, "", EndpointList{}, -1, fmt.Errorf("path '/d1' can not be served by different port on same address")},
-		{"localhost:9000", []string{"https://127.0.0.1:8000/d1", "https://localhost:9001/d2", "https://example.com/d1", "https://example.com/d2"}, "", EndpointList{}, -1, fmt.Errorf("port number in server address must match with one of the port in local endpoints")},
-		{"localhost:10000", []string{"https://127.0.0.1:8000/d1", "https://localhost:8000/d2", "https://example.com/d1", "https://example.com/d2"}, "", EndpointList{}, -1, fmt.Errorf("server address and local endpoint have different ports")},
+		{"localhost:9000", [][]string{{"http://localhost/d1"}}, "", EndpointList{}, -1, fmt.Errorf("use path style endpoint for FS setup")},
+		{":443", [][]string{{"d1"}}, ":443", EndpointList{Endpoint{URL: &url.URL{Path: "d1"}, IsLocal: true}}, FSSetupType, nil},
+		{"localhost:10000", [][]string{{"/d1"}}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: "/d1"}, IsLocal: true}}, FSSetupType, nil},
+		{"localhost:10000", [][]string{{"./d1"}}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: "d1"}, IsLocal: true}}, FSSetupType, nil},
+		{"localhost:10000", [][]string{{`\d1`}}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: `\d1`}, IsLocal: true}}, FSSetupType, nil},
+		{"localhost:10000", [][]string{{`.\d1`}}, "localhost:10000", EndpointList{Endpoint{URL: &url.URL{Path: `.\d1`}, IsLocal: true}}, FSSetupType, nil},
+		{":8080", [][]string{{"https://example.org/d1", "https://example.org/d2", "https://example.org/d3", "https://example.org/d4"}}, "", EndpointList{}, -1, fmt.Errorf("no endpoint found for this host")},
+		{":8080", [][]string{{"https://example.org/d1", "https://example.com/d2", "https://example.net:8000/d3", "https://example.edu/d1"}}, "", EndpointList{}, -1, fmt.Errorf("no endpoint found for this host")},
+		{"localhost:9000", [][]string{{"https://127.0.0.1:9000/d1", "https://localhost:9001/d1", "https://example.com/d1", "https://example.com/d2"}}, "", EndpointList{}, -1, fmt.Errorf("path '/d1' can not be served by different port on same address")},
+		{"localhost:9000", [][]string{{"https://127.0.0.1:8000/d1", "https://localhost:9001/d2", "https://example.com/d1", "https://example.com/d2"}}, "", EndpointList{}, -1, fmt.Errorf("port number in server address must match with one of the port in local endpoints")},
+		{"localhost:10000", [][]string{{"https://127.0.0.1:8000/d1", "https://localhost:8000/d2", "https://example.com/d1", "https://example.com/d2"}}, "", EndpointList{}, -1, fmt.Errorf("server address and local endpoint have different ports")},
 
 		// XL Setup with PathEndpointType
-		{":1234", []string{"/d1", "/d2", "d3", "d4"}, ":1234",
+		{":1234", [][]string{{"/d1", "/d2", "d3", "d4"}}, ":1234",
 			EndpointList{
 				Endpoint{URL: &url.URL{Path: "/d1"}, IsLocal: true},
 				Endpoint{URL: &url.URL{Path: "/d2"}, IsLocal: true},
@@ -243,53 +240,55 @@ func TestCreateEndpoints(t *testing.T) {
 				Endpoint{URL: &url.URL{Path: "d4"}, IsLocal: true},
 			}, XLSetupType, nil},
 		// XL Setup with URLEndpointType
-		{":9000", []string{"http://localhost/d1", "http://localhost/d2", "http://localhost/d3", "http://localhost/d4"}, ":9000", EndpointList{
+		{":9000", [][]string{{"http://localhost/d1", "http://localhost/d2", "http://localhost/d3", "http://localhost/d4"}}, ":9000", EndpointList{
 			Endpoint{URL: &url.URL{Path: "/d1"}, IsLocal: true},
 			Endpoint{URL: &url.URL{Path: "/d2"}, IsLocal: true},
 			Endpoint{URL: &url.URL{Path: "/d3"}, IsLocal: true},
 			Endpoint{URL: &url.URL{Path: "/d4"}, IsLocal: true},
 		}, XLSetupType, nil},
 		// XL Setup with URLEndpointType having mixed naming to local host.
-		{"127.0.0.1:10000", []string{"http://localhost/d1", "http://localhost/d2", "http://127.0.0.1/d3", "http://127.0.0.1/d4"}, ":10000", EndpointList{
+		{"127.0.0.1:10000", [][]string{{"http://localhost/d1", "http://localhost/d2", "http://127.0.0.1/d3", "http://127.0.0.1/d4"}}, ":10000", EndpointList{
 			Endpoint{URL: &url.URL{Path: "/d1"}, IsLocal: true},
 			Endpoint{URL: &url.URL{Path: "/d2"}, IsLocal: true},
 			Endpoint{URL: &url.URL{Path: "/d3"}, IsLocal: true},
 			Endpoint{URL: &url.URL{Path: "/d4"}, IsLocal: true},
 		}, XLSetupType, nil},
-		{":9001", []string{"http://10.0.0.1:9000/export", "http://10.0.0.2:9000/export", "http://" + nonLoopBackIP + ":9001/export", "http://10.0.0.2:9001/export"}, "", EndpointList{}, -1, fmt.Errorf("path '/export' can not be served by different port on same address")},
+		{":9001", [][]string{{"http://10.0.0.1:9000/export", "http://10.0.0.2:9000/export", "http://" + nonLoopBackIP + ":9001/export", "http://10.0.0.2:9001/export"}}, "", EndpointList{}, -1, fmt.Errorf("path '/export' can not be served by different port on same address")},
 
-		{":9000", []string{"http://localhost/d1", "http://localhost/d2", "http://example.org/d3", "http://example.com/d4"}, "", EndpointList{}, -1, fmt.Errorf("'localhost' resolves to loopback address is not allowed for distributed XL")},
+		{":9000", [][]string{{"http://127.0.0.1:9000/export", "http://" + nonLoopBackIP + ":9000/export", "http://10.0.0.1:9000/export", "http://10.0.0.2:9000/export"}}, "", EndpointList{}, -1, fmt.Errorf("path '/export' cannot be served by different address on same server")},
+
+		{":9000", [][]string{{"http://localhost/d1", "http://localhost/d2", "http://example.org/d3", "http://example.com/d4"}}, "", EndpointList{}, -1, fmt.Errorf("'localhost' resolves to loopback address is not allowed for distributed XL")},
 
 		// DistXL type
-		{"127.0.0.1:10000", []string{case1Endpoint1, case1Endpoint2, "http://example.org/d3", "http://example.com/d4"}, "127.0.0.1:10000", EndpointList{
+		{"127.0.0.1:10000", [][]string{{case1Endpoint1, case1Endpoint2, "http://example.org/d3", "http://example.com/d4"}}, "127.0.0.1:10000", EndpointList{
 			Endpoint{URL: case1URLs[0], IsLocal: case1LocalFlags[0]},
 			Endpoint{URL: case1URLs[1], IsLocal: case1LocalFlags[1]},
 			Endpoint{URL: case1URLs[2], IsLocal: case1LocalFlags[2]},
 			Endpoint{URL: case1URLs[3], IsLocal: case1LocalFlags[3]},
 		}, DistXLSetupType, nil},
 
-		{"127.0.0.1:10000", []string{case2Endpoint1, case2Endpoint2, "http://example.org/d3", "http://example.com/d4"}, "127.0.0.1:10000", EndpointList{
+		{"127.0.0.1:10000", [][]string{{case2Endpoint1, case2Endpoint2, "http://example.org/d3", "http://example.com/d4"}}, "127.0.0.1:10000", EndpointList{
 			Endpoint{URL: case2URLs[0], IsLocal: case2LocalFlags[0]},
 			Endpoint{URL: case2URLs[1], IsLocal: case2LocalFlags[1]},
 			Endpoint{URL: case2URLs[2], IsLocal: case2LocalFlags[2]},
 			Endpoint{URL: case2URLs[3], IsLocal: case2LocalFlags[3]},
 		}, DistXLSetupType, nil},
 
-		{":80", []string{case3Endpoint1, "http://example.org:9000/d2", "http://example.com/d3", "http://example.net/d4"}, ":80", EndpointList{
+		{":80", [][]string{{case3Endpoint1, "http://example.org:9000/d2", "http://example.com/d3", "http://example.net/d4"}}, ":80", EndpointList{
 			Endpoint{URL: case3URLs[0], IsLocal: case3LocalFlags[0]},
 			Endpoint{URL: case3URLs[1], IsLocal: case3LocalFlags[1]},
 			Endpoint{URL: case3URLs[2], IsLocal: case3LocalFlags[2]},
 			Endpoint{URL: case3URLs[3], IsLocal: case3LocalFlags[3]},
 		}, DistXLSetupType, nil},
 
-		{":9000", []string{case4Endpoint1, "http://example.org/d2", "http://example.com/d3", "http://example.net/d4"}, ":9000", EndpointList{
+		{":9000", [][]string{{case4Endpoint1, "http://example.org/d2", "http://example.com/d3", "http://example.net/d4"}}, ":9000", EndpointList{
 			Endpoint{URL: case4URLs[0], IsLocal: case4LocalFlags[0]},
 			Endpoint{URL: case4URLs[1], IsLocal: case4LocalFlags[1]},
 			Endpoint{URL: case4URLs[2], IsLocal: case4LocalFlags[2]},
 			Endpoint{URL: case4URLs[3], IsLocal: case4LocalFlags[3]},
 		}, DistXLSetupType, nil},
 
-		{":9000", []string{case5Endpoint1, case5Endpoint2, case5Endpoint3, case5Endpoint4}, ":9000", EndpointList{
+		{":9000", [][]string{{case5Endpoint1, case5Endpoint2, case5Endpoint3, case5Endpoint4}}, ":9000", EndpointList{
 			Endpoint{URL: case5URLs[0], IsLocal: case5LocalFlags[0]},
 			Endpoint{URL: case5URLs[1], IsLocal: case5LocalFlags[1]},
 			Endpoint{URL: case5URLs[2], IsLocal: case5LocalFlags[2]},
@@ -297,7 +296,7 @@ func TestCreateEndpoints(t *testing.T) {
 		}, DistXLSetupType, nil},
 
 		// DistXL Setup using only local host.
-		{":9003", []string{"http://localhost:9000/d1", "http://localhost:9001/d2", "http://127.0.0.1:9002/d3", case6Endpoint}, ":9003", EndpointList{
+		{":9003", [][]string{{"http://localhost:9000/d1", "http://localhost:9001/d2", "http://127.0.0.1:9002/d3", case6Endpoint}}, ":9003", EndpointList{
 			Endpoint{URL: case6URLs[0], IsLocal: case6LocalFlags[0]},
 			Endpoint{URL: case6URLs[1], IsLocal: case6LocalFlags[1]},
 			Endpoint{URL: case6URLs[2], IsLocal: case6LocalFlags[2]},

cmd/erasure-createfile.go

@@ -19,6 +19,8 @@ package cmd
 import (
 	"hash"
 	"io"
+
+	"github.com/minio/minio/pkg/errors"
 )
 
 // CreateFile creates a new bitrot encoded file spread over all available disks. CreateFile will create
@@ -26,14 +28,14 @@ import (
 // be used to protect the erasure encoded file.
 func (s *ErasureStorage) CreateFile(src io.Reader, volume, path string, buffer []byte, algorithm BitrotAlgorithm, writeQuorum int) (f ErasureFileInfo, err error) {
 	if !algorithm.Available() {
-		return f, traceError(errBitrotHashAlgoInvalid)
+		return f, errors.Trace(errBitrotHashAlgoInvalid)
 	}
 	f.Checksums = make([][]byte, len(s.disks))
 	hashers := make([]hash.Hash, len(s.disks))
 	for i := range hashers {
 		hashers[i] = algorithm.New()
 	}
-	errChans, errors := make([]chan error, len(s.disks)), make([]error, len(s.disks))
+	errChans, errs := make([]chan error, len(s.disks)), make([]error, len(s.disks))
 	for i := range errChans {
 		errChans[i] = make(chan error, 1) // create buffered channel to let finished go-routines die early
 	}
@@ -53,19 +55,19 @@ func (s *ErasureStorage) CreateFile(src io.Reader, volume, path string, buffer [
 				return f, err
 			}
 		} else {
-			return f, traceError(err)
+			return f, errors.Trace(err)
 		}
 
 		for i := range errChans { // span workers
 			go erasureAppendFile(s.disks[i], volume, path, hashers[i], blocks[i], errChans[i])
 		}
 		for i := range errChans { // what until all workers are finished
-			errors[i] = <-errChans[i]
+			errs[i] = <-errChans[i]
 		}
-		if err = reduceWriteQuorumErrs(errors, objectOpIgnoredErrs, writeQuorum); err != nil {
+		if err = reduceWriteQuorumErrs(errs, objectOpIgnoredErrs, writeQuorum); err != nil {
 			return f, err
 		}
-		s.disks = evalDisks(s.disks, errors)
+		s.disks = evalDisks(s.disks, errs)
 		f.Size += int64(n)
 	}
 
@@ -83,7 +85,7 @@ func (s *ErasureStorage) CreateFile(src io.Reader, volume, path string, buffer [
 // the hash of the written data. It sends the write error (or nil) over the error channel.
 func erasureAppendFile(disk StorageAPI, volume, path string, hash hash.Hash, buf []byte, errChan chan<- error) {
 	if disk == OfflineDisk {
-		errChan <- traceError(errDiskNotFound)
+		errChan <- errors.Trace(errDiskNotFound)
 		return
 	}
 	err := disk.AppendFile(volume, path, buf)

cmd/erasure-createfile_test.go

@@ -70,7 +70,7 @@ func TestErasureCreateFile(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Test %d: failed to create test setup: %v", i, err)
 		}
-		storage, err := NewErasureStorage(setup.disks, test.dataBlocks, test.onDisks-test.dataBlocks)
+		storage, err := NewErasureStorage(setup.disks, test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
@@ -116,3 +116,77 @@ func TestErasureCreateFile(t *testing.T) {
 		setup.Remove()
 	}
 }
+
+// Benchmarks
+
+func benchmarkErasureWrite(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
+	setup, err := newErasureTestSetup(data, parity, blockSizeV1)
+	if err != nil {
+		b.Fatalf("failed to create test setup: %v", err)
+	}
+	defer setup.Remove()
+	storage, err := NewErasureStorage(setup.disks, data, parity, blockSizeV1)
+	if err != nil {
+		b.Fatalf("failed to create ErasureStorage: %v", err)
+	}
+	buffer := make([]byte, blockSizeV1, 2*blockSizeV1)
+	content := make([]byte, size)
+
+	for i := 0; i < dataDown; i++ {
+		storage.disks[i] = OfflineDisk
+	}
+	for i := data; i < data+parityDown; i++ {
+		storage.disks[i] = OfflineDisk
+	}
+
+	b.ResetTimer()
+	b.SetBytes(size)
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		_, err := storage.CreateFile(bytes.NewReader(content), "testbucket", "object", buffer, DefaultBitrotAlgorithm, data+1)
+		if err != nil {
+			panic(err)
+		}
+	}
+}
+
+func BenchmarkErasureWriteQuick(b *testing.B) {
+	const size = 12 * 1024 * 1024
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 1, 0, size, b) })
+}
+
+func BenchmarkErasureWrite_4_64KB(b *testing.B) {
+	const size = 64 * 1024
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureWrite(2, 2, 1, 0, size, b) })
+}
+
+func BenchmarkErasureWrite_8_20MB(b *testing.B) {
+	const size = 20 * 1024 * 1024
+	b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 0, 0, size, b) })
+	b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 0, 1, size, b) })
+	b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 1, 0, size, b) })
+	b.Run(" 0000|XXX0 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 0, 3, size, b) })
+	b.Run(" XXX0|0000 ", func(b *testing.B) { benchmarkErasureWrite(4, 4, 3, 0, size, b) })
+}
+
+func BenchmarkErasureWrite_12_30MB(b *testing.B) {
+	const size = 30 * 1024 * 1024
+	b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 0, 0, size, b) })
+	b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 0, 1, size, b) })
+	b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 1, 0, size, b) })
+	b.Run(" 000000|XXXXX0 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 0, 5, size, b) })
+	b.Run(" XXXXX0|000000 ", func(b *testing.B) { benchmarkErasureWrite(6, 6, 5, 0, size, b) })
+}
+
+func BenchmarkErasureWrite_16_40MB(b *testing.B) {
+	const size = 40 * 1024 * 1024
+	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 0, 0, size, b) })
+	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 0, 1, size, b) })
+	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 1, 0, size, b) })
+	b.Run(" 00000000|XXXXXXX0 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 0, 7, size, b) })
+	b.Run(" XXXXXXX0|00000000 ", func(b *testing.B) { benchmarkErasureWrite(8, 8, 7, 0, size, b) })
+}

cmd/erasure-healfile.go

@@ -20,6 +20,8 @@ import (
 	"fmt"
 	"hash"
 	"strings"
+
+	"github.com/minio/minio/pkg/errors"
 )
 
 // HealFile tries to reconstruct an erasure-coded file spread over all
@@ -48,7 +50,7 @@ func (s ErasureStorage) HealFile(staleDisks []StorageAPI, volume, path string, b
 	f ErasureFileInfo, err error) {
 
 	if !alg.Available() {
-		return f, traceError(errBitrotHashAlgoInvalid)
+		return f, errors.Trace(errBitrotHashAlgoInvalid)
 	}
 
 	// Initialization
@@ -68,58 +70,67 @@ func (s ErasureStorage) HealFile(staleDisks []StorageAPI, volume, path string, b
 	}
 	writeErrors := make([]error, len(s.disks))
 
+	// Read part file data on each disk
+	chunksize := ceilFrac(blocksize, int64(s.dataBlocks))
+	numBlocks := ceilFrac(size, blocksize)
+
+	readLen := chunksize * (numBlocks - 1)
+
+	lastChunkSize := chunksize
+	hasSmallerLastBlock := size%blocksize != 0
+	if hasSmallerLastBlock {
+		lastBlockLen := size % blocksize
+		lastChunkSize = ceilFrac(lastBlockLen, int64(s.dataBlocks))
+	}
+	readLen += lastChunkSize
+	var buffers [][]byte
+	buffers, _, err = s.readConcurrent(volume, path, 0, readLen, verifiers)
+	if err != nil {
+		return f, err
+	}
+
 	// Scan part files on disk, block-by-block reconstruct it and
 	// write to stale disks.
-	chunksize := getChunkSize(blocksize, s.dataBlocks)
 	blocks := make([][]byte, len(s.disks))
-	for i := range blocks {
-		blocks[i] = make([]byte, chunksize)
+
+	if numBlocks > 1 {
+		// Allocate once for all the equal length blocks. The
+		// last block may have a different length - allocation
+		// for this happens inside the for loop below.
+		for i := range blocks {
+			if len(buffers[i]) == 0 {
+				blocks[i] = make([]byte, chunksize)
+			}
+		}
 	}
-	var chunkOffset, blockOffset int64
-	for ; blockOffset < size; blockOffset += blocksize {
-		// last iteration may have less than blocksize data
-		// left, so chunksize needs to be recomputed.
-		if size < blockOffset+blocksize {
-			blocksize = size - blockOffset
-			chunksize = getChunkSize(blocksize, s.dataBlocks)
+
+	var buffOffset int64
+	for blockNumber := int64(0); blockNumber < numBlocks; blockNumber++ {
+		if blockNumber == numBlocks-1 && lastChunkSize != chunksize {
 			for i := range blocks {
-				blocks[i] = blocks[i][:chunksize]
-			}
-		}
-		// read a chunk from each disk, until we have
-		// `s.dataBlocks` number of chunks set to non-nil in
-		// `blocks`
-		numReads := 0
-		for i, disk := range s.disks {
-			// skip reading from unavailable or stale disks
-			if disk == nil || staleDisks[i] != nil {
-				blocks[i] = blocks[i][:0] // mark shard as missing
-				continue
-			}
-			_, err = disk.ReadFile(volume, path, chunkOffset, blocks[i], verifiers[i])
-			if err != nil {
-				// LOG FIXME: add a conditional log
-				// for read failures, once per-disk
-				// per-function-invocation.
-				blocks[i] = blocks[i][:0] // mark shard as missing
-				continue
-			}
-			numReads++
-			if numReads == s.dataBlocks {
-				// we have enough data to reconstruct
-				// mark all other blocks as missing
-				for j := i + 1; j < len(blocks); j++ {
-					blocks[j] = blocks[j][:0] // mark shard as missing
+				if len(buffers[i]) == 0 {
+					blocks[i] = make([]byte, lastChunkSize)
 				}
-				break
 			}
 		}
 
-		// advance the chunk offset to prepare for next loop
-		// iteration
-		chunkOffset += chunksize
+		for i := range blocks {
+			if len(buffers[i]) == 0 {
+				blocks[i] = blocks[i][0:0]
+			}
+		}
+
+		csize := chunksize
+		if blockNumber == numBlocks-1 {
+			csize = lastChunkSize
+		}
+		for i := range blocks {
+			if len(buffers[i]) != 0 {
+				blocks[i] = buffers[i][buffOffset : buffOffset+csize]
+			}
+		}
+		buffOffset += csize
 
-		// reconstruct data - this computes all data and parity shards
 		if err = s.ErasureDecodeDataAndParityBlocks(blocks); err != nil {
 			return f, err
 		}
@@ -144,7 +155,7 @@ func (s ErasureStorage) HealFile(staleDisks []StorageAPI, volume, path string, b
 		// If all disks had write errors we quit.
 		if !writeSucceeded {
 			// build error from all write errors
-			return f, traceError(joinWriteErrors(writeErrors))
+			return f, errors.Trace(joinWriteErrors(writeErrors))
 		}
 	}
 

cmd/erasure-healfile_test.go

@@ -74,7 +74,7 @@ func TestErasureHealFile(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Test %d: failed to setup XL environment: %v", i, err)
 		}
-		storage, err := NewErasureStorage(setup.disks, test.dataBlocks, test.disks-test.dataBlocks)
+		storage, err := NewErasureStorage(setup.disks, test.dataBlocks, test.disks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)

cmd/erasure-readfile.go

@@ -18,20 +18,86 @@ package cmd
 
 import (
 	"io"
+
+	"github.com/minio/minio/pkg/errors"
 )
 
-// ReadFile reads as much data as requested from the file under the given volume and path and writes the data to the provided writer.
-// The algorithm and the keys/checksums are used to verify the integrity of the given file. ReadFile will read data from the given offset
-// up to the given length. If parts of the file are corrupted ReadFile tries to reconstruct the data.
-func (s ErasureStorage) ReadFile(writer io.Writer, volume, path string, offset, length int64, totalLength int64, checksums [][]byte, algorithm BitrotAlgorithm, blocksize int64) (f ErasureFileInfo, err error) {
+type errIdx struct {
+	idx int
+	err error
+}
+
+func (s ErasureStorage) readConcurrent(volume, path string, offset, length int64,
+	verifiers []*BitrotVerifier) (buffers [][]byte, needsReconstruction bool,
+	err error) {
+
+	errChan := make(chan errIdx)
+	stageBuffers := make([][]byte, len(s.disks))
+	buffers = make([][]byte, len(s.disks))
+
+	readDisk := func(i int) {
+		stageBuffers[i] = make([]byte, length)
+		disk := s.disks[i]
+		if disk == OfflineDisk {
+			errChan <- errIdx{i, errors.Trace(errDiskNotFound)}
+			return
+		}
+		_, rerr := disk.ReadFile(volume, path, offset, stageBuffers[i], verifiers[i])
+		errChan <- errIdx{i, rerr}
+	}
+
+	var finishedCount, successCount, launchIndex int
+
+	for ; launchIndex < s.dataBlocks; launchIndex++ {
+		go readDisk(launchIndex)
+	}
+	for finishedCount < launchIndex {
+		select {
+		case errVal := <-errChan:
+			finishedCount++
+			if errVal.err != nil {
+				// TODO: meaningfully log the disk read error
+
+				// A disk failed to return data, so we
+				// request an additional disk if possible
+				if launchIndex < s.dataBlocks+s.parityBlocks {
+					needsReconstruction = true
+					// requiredBlocks++
+					go readDisk(launchIndex)
+					launchIndex++
+				}
+			} else {
+				successCount++
+				buffers[errVal.idx] = stageBuffers[errVal.idx]
+				stageBuffers[errVal.idx] = nil
+			}
+		}
+	}
+	if successCount != s.dataBlocks {
+		// Not enough disks returns data.
+		err = errors.Trace(errXLReadQuorum)
+	}
+	return
+}
+
+// ReadFile reads as much data as requested from the file under the
+// given volume and path and writes the data to the provided writer.
+// The algorithm and the keys/checksums are used to verify the
+// integrity of the given file. ReadFile will read data from the given
+// offset up to the given length. If parts of the file are corrupted
+// ReadFile tries to reconstruct the data.
+func (s ErasureStorage) ReadFile(writer io.Writer, volume, path string, offset,
+	length, totalLength int64, checksums [][]byte, algorithm BitrotAlgorithm,
+	blocksize int64) (f ErasureFileInfo, err error) {
+
 	if offset < 0 || length < 0 {
-		return f, traceError(errUnexpected)
+		return f, errors.Trace(errUnexpected)
 	}
 	if offset+length > totalLength {
-		return f, traceError(errUnexpected)
+		return f, errors.Trace(errUnexpected)
 	}
 	if !algorithm.Available() {
-		return f, traceError(errBitrotHashAlgoInvalid)
+		return f, errors.Trace(errBitrotHashAlgoInvalid)
 	}
 
 	f.Checksums = make([][]byte, len(s.disks))
@@ -42,117 +108,122 @@ func (s ErasureStorage) ReadFile(writer io.Writer, volume, path string, offset,
 		}
 		verifiers[i] = NewBitrotVerifier(algorithm, checksums[i])
 	}
-	errChans := make([]chan error, len(s.disks))
-	for i := range errChans {
-		errChans[i] = make(chan error, 1)
-	}
-	lastBlock := totalLength / blocksize
-	startOffset := offset % blocksize
-	chunksize := getChunkSize(blocksize, s.dataBlocks)
 
+	chunksize := ceilFrac(blocksize, int64(s.dataBlocks))
+
+	// We read all whole-blocks of erasure coded data containing
+	// the requested data range.
+	//
+	// The start index of the erasure coded block containing the
+	// `offset` byte of data is:
+	partDataStartIndex := (offset / blocksize) * chunksize
+	// The start index of the erasure coded block containing the
+	// (last) byte of data at the index `offset + length - 1` is:
+	blockStartIndex := ((offset + length - 1) / blocksize) * chunksize
+	// However, we need the end index of the e.c. block containing
+	// the last byte - we need to check if that block is the last
+	// block in the part (in that case, it may be have a different
+	// chunk size)
+	isLastBlock := (totalLength-1)/blocksize == (offset+length-1)/blocksize
+	var partDataEndIndex int64
+	if isLastBlock {
+		lastBlockChunkSize := chunksize
+		if totalLength%blocksize != 0 {
+			lastBlockChunkSize = ceilFrac(totalLength%blocksize, int64(s.dataBlocks))
+		}
+		partDataEndIndex = blockStartIndex + lastBlockChunkSize - 1
+	} else {
+		partDataEndIndex = blockStartIndex + chunksize - 1
+	}
+
+	// Thus, the length of data to be read from the part file(s) is:
+	partDataLength := partDataEndIndex - partDataStartIndex + 1
+	// The calculation above does not apply when length == 0:
+	if length == 0 {
+		partDataLength = 0
+	}
+
+	var buffers [][]byte
+	var needsReconstruction bool
+	buffers, needsReconstruction, err = s.readConcurrent(volume, path,
+		partDataStartIndex, partDataLength, verifiers)
+	if err != nil {
+		// Could not read enough disks.
+		return
+	}
+
+	numChunks := ceilFrac(partDataLength, chunksize)
 	blocks := make([][]byte, len(s.disks))
-	for i := range blocks {
-		blocks[i] = make([]byte, chunksize)
-	}
-	for off := offset / blocksize; length > 0; off++ {
-		blockOffset := off * chunksize
 
-		if currentBlock := (offset + f.Size) / blocksize; currentBlock == lastBlock {
-			blocksize = totalLength % blocksize
-			chunksize = getChunkSize(blocksize, s.dataBlocks)
-			for i := range blocks {
-				blocks[i] = blocks[i][:chunksize]
+	if needsReconstruction && numChunks > 1 {
+		// Allocate once for all the equal length blocks. The
+		// last block may have a different length - allocation
+		// for this happens inside the for loop below.
+		for i := range blocks {
+			if len(buffers[i]) == 0 {
+				blocks[i] = make([]byte, chunksize)
 			}
 		}
-		err = s.readConcurrent(volume, path, blockOffset, blocks, verifiers, errChans)
-		if err != nil {
-			return f, traceError(errXLReadQuorum)
+	}
+
+	var buffOffset int64
+	for chunkNumber := int64(0); chunkNumber < numChunks; chunkNumber++ {
+		if chunkNumber == numChunks-1 && partDataLength%chunksize != 0 {
+			chunksize = partDataLength % chunksize
+			// We allocate again as the last chunk has a
+			// different size.
+			for i := range blocks {
+				if len(buffers[i]) == 0 {
+					blocks[i] = make([]byte, chunksize)
+				}
+			}
 		}
 
-		writeLength := blocksize - startOffset
-		if length < writeLength {
-			writeLength = length
+		for i := range blocks {
+			if len(buffers[i]) == 0 {
+				blocks[i] = blocks[i][0:0]
+			}
 		}
-		n, err := writeDataBlocks(writer, blocks, s.dataBlocks, startOffset, writeLength)
+
+		for i := range blocks {
+			if len(buffers[i]) != 0 {
+				blocks[i] = buffers[i][buffOffset : buffOffset+chunksize]
+			}
+		}
+		buffOffset += chunksize
+
+		if needsReconstruction {
+			if err = s.ErasureDecodeDataBlocks(blocks); err != nil {
+				return f, errors.Trace(err)
+			}
+		}
+
+		var writeStart int64
+		if chunkNumber == 0 {
+			writeStart = offset % blocksize
+		}
+
+		writeLength := blocksize - writeStart
+		if chunkNumber == numChunks-1 {
+			lastBlockLength := (offset + length) % blocksize
+			if lastBlockLength != 0 {
+				writeLength = lastBlockLength - writeStart
+			}
+		}
+		n, err := writeDataBlocks(writer, blocks, s.dataBlocks, writeStart, writeLength)
 		if err != nil {
 			return f, err
 		}
-		startOffset = 0
+
 		f.Size += n
-		length -= n
 	}
 
 	f.Algorithm = algorithm
 	for i, disk := range s.disks {
-		if disk == OfflineDisk {
+		if disk == OfflineDisk || buffers[i] == nil {
 			continue
 		}
 		f.Checksums[i] = verifiers[i].Sum(nil)
 	}
 	return f, nil
 }
-
-func erasureCountMissingBlocks(blocks [][]byte, limit int) int {
-	missing := 0
-	for i := range blocks[:limit] {
-		if len(blocks[i]) == 0 {
-			missing++
-		}
-	}
-	return missing
-}
-
-// readConcurrent reads all requested data concurrently from the disks into blocks. It returns an error if
-// too many disks failed while reading.
-func (s *ErasureStorage) readConcurrent(volume, path string, offset int64, blocks [][]byte, verifiers []*BitrotVerifier, errChans []chan error) (err error) {
-	errs := make([]error, len(s.disks))
-
-	erasureReadBlocksConcurrent(s.disks[:s.dataBlocks], volume, path, offset, blocks[:s.dataBlocks], verifiers[:s.dataBlocks], errs[:s.dataBlocks], errChans[:s.dataBlocks])
-	missingDataBlocks := erasureCountMissingBlocks(blocks, s.dataBlocks)
-	mustReconstruct := missingDataBlocks > 0
-	if mustReconstruct {
-		requiredReads := s.dataBlocks + missingDataBlocks
-		if requiredReads > s.dataBlocks+s.parityBlocks {
-			return errXLReadQuorum
-		}
-		erasureReadBlocksConcurrent(s.disks[s.dataBlocks:requiredReads], volume, path, offset, blocks[s.dataBlocks:requiredReads], verifiers[s.dataBlocks:requiredReads], errs[s.dataBlocks:requiredReads], errChans[s.dataBlocks:requiredReads])
-		if erasureCountMissingBlocks(blocks, requiredReads) > 0 {
-			erasureReadBlocksConcurrent(s.disks[requiredReads:], volume, path, offset, blocks[requiredReads:], verifiers[requiredReads:], errs[requiredReads:], errChans[requiredReads:])
-		}
-	}
-	if err = reduceReadQuorumErrs(errs, []error{}, s.dataBlocks); err != nil {
-		return err
-	}
-	if mustReconstruct {
-		if err = s.ErasureDecodeDataBlocks(blocks); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// erasureReadBlocksConcurrent reads all data from each disk to each data block in parallel.
-// Therefore disks, blocks, verifiers errors and locks must have the same length.
-func erasureReadBlocksConcurrent(disks []StorageAPI, volume, path string, offset int64, blocks [][]byte, verifiers []*BitrotVerifier, errors []error, errChans []chan error) {
-	for i := range errChans {
-		go erasureReadFromFile(disks[i], volume, path, offset, blocks[i], verifiers[i], errChans[i])
-	}
-	for i := range errChans {
-		errors[i] = <-errChans[i] // blocks until the go routine 'i' is done - no data race
-		if errors[i] != nil {
-			disks[i] = OfflineDisk
-			blocks[i] = blocks[i][:0] // mark shard as missing
-		}
-	}
-}
-
-// erasureReadFromFile reads data from the disk to buffer in parallel.
-// It sends the returned error through the error channel.
-func erasureReadFromFile(disk StorageAPI, volume, path string, offset int64, buffer []byte, verifier *BitrotVerifier, errChan chan<- error) {
-	if disk == OfflineDisk {
-		errChan <- traceError(errDiskNotFound)
-		return
-	}
-	_, err := disk.ReadFile(volume, path, offset, buffer, verifier)
-	errChan <- err
-}

cmd/erasure-readfile_test.go

@@ -86,7 +86,7 @@ func TestErasureReadFile(t *testing.T) {
 		if err != nil {
 			t.Fatalf("Test %d: failed to create test setup: %v", i, err)
 		}
-		storage, err := NewErasureStorage(setup.disks, test.dataBlocks, test.onDisks-test.dataBlocks)
+		storage, err := NewErasureStorage(setup.disks, test.dataBlocks, test.onDisks-test.dataBlocks, test.blocksize)
 		if err != nil {
 			setup.Remove()
 			t.Fatalf("Test %d: failed to create ErasureStorage: %v", i, err)
@@ -174,7 +174,7 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 	}
 	defer setup.Remove()
 
-	storage, err := NewErasureStorage(setup.disks, dataBlocks, parityBlocks)
+	storage, err := NewErasureStorage(setup.disks, dataBlocks, parityBlocks, blockSize)
 	if err != nil {
 		t.Fatalf("failed to create ErasureStorage: %v", err)
 	}
@@ -222,3 +222,92 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 		buf.Reset()
 	}
 }
+
+// Benchmarks
+
+func benchmarkErasureRead(data, parity, dataDown, parityDown int, size int64, b *testing.B) {
+	setup, err := newErasureTestSetup(data, parity, blockSizeV1)
+	if err != nil {
+		b.Fatalf("failed to create test setup: %v", err)
+	}
+	defer setup.Remove()
+	storage, err := NewErasureStorage(setup.disks, data, parity, blockSizeV1)
+	if err != nil {
+		b.Fatalf("failed to create ErasureStorage: %v", err)
+	}
+
+	content := make([]byte, size)
+	buffer := make([]byte, blockSizeV1, 2*blockSizeV1)
+	file, err := storage.CreateFile(bytes.NewReader(content), "testbucket", "object", buffer, DefaultBitrotAlgorithm, data+1)
+	if err != nil {
+		b.Fatalf("failed to create erasure test file: %v", err)
+	}
+	checksums := file.Checksums
+
+	for i := 0; i < dataDown; i++ {
+		storage.disks[i] = OfflineDisk
+	}
+	for i := data; i < data+parityDown; i++ {
+		storage.disks[i] = OfflineDisk
+	}
+
+	b.ResetTimer()
+	b.SetBytes(size)
+	b.ReportAllocs()
+	for i := 0; i < b.N; i++ {
+		if file, err = storage.ReadFile(bytes.NewBuffer(content[:0]), "testbucket", "object", 0, size, size, checksums, DefaultBitrotAlgorithm, blockSizeV1); err != nil {
+			panic(err)
+		}
+	}
+}
+
+func BenchmarkErasureReadQuick(b *testing.B) {
+	const size = 12 * 1024 * 1024
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 0, size, b) })
+	b.Run(" X0|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 1, size, b) })
+}
+
+func BenchmarkErasureRead_4_64KB(b *testing.B) {
+	const size = 64 * 1024
+	b.Run(" 00|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 0, size, b) })
+	b.Run(" 00|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 1, size, b) })
+	b.Run(" X0|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 0, size, b) })
+	b.Run(" X0|X0 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 1, 1, size, b) })
+	b.Run(" 00|XX ", func(b *testing.B) { benchmarkErasureRead(2, 2, 0, 2, size, b) })
+	b.Run(" XX|00 ", func(b *testing.B) { benchmarkErasureRead(2, 2, 2, 0, size, b) })
+}
+
+func BenchmarkErasureRead_8_20MB(b *testing.B) {
+	const size = 20 * 1024 * 1024
+	b.Run(" 0000|0000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 0, 0, size, b) })
+	b.Run(" 0000|X000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 0, 1, size, b) })
+	b.Run(" X000|0000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 1, 0, size, b) })
+	b.Run(" X000|X000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 1, 1, size, b) })
+	b.Run(" 0000|XXXX ", func(b *testing.B) { benchmarkErasureRead(4, 4, 0, 4, size, b) })
+	b.Run(" XX00|XX00 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 2, 2, size, b) })
+	b.Run(" XXXX|0000 ", func(b *testing.B) { benchmarkErasureRead(4, 4, 4, 0, size, b) })
+}
+
+func BenchmarkErasureRead_12_30MB(b *testing.B) {
+	const size = 30 * 1024 * 1024
+	b.Run(" 000000|000000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 0, 0, size, b) })
+	b.Run(" 000000|X00000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 0, 1, size, b) })
+	b.Run(" X00000|000000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 1, 0, size, b) })
+	b.Run(" X00000|X00000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 1, 1, size, b) })
+	b.Run(" 000000|XXXXXX ", func(b *testing.B) { benchmarkErasureRead(6, 6, 0, 6, size, b) })
+	b.Run(" XXX000|XXX000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 3, 3, size, b) })
+	b.Run(" XXXXXX|000000 ", func(b *testing.B) { benchmarkErasureRead(6, 6, 6, 0, size, b) })
+}
+
+func BenchmarkErasureRead_16_40MB(b *testing.B) {
+	const size = 40 * 1024 * 1024
+	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 0, 0, size, b) })
+	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 0, 1, size, b) })
+	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 1, 0, size, b) })
+	b.Run(" X0000000|X0000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 1, 1, size, b) })
+	b.Run(" 00000000|XXXXXXXX ", func(b *testing.B) { benchmarkErasureRead(8, 8, 0, 8, size, b) })
+	b.Run(" XXXX0000|XXXX0000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 4, 4, size, b) })
+	b.Run(" XXXXXXXX|00000000 ", func(b *testing.B) { benchmarkErasureRead(8, 8, 8, 0, size, b) })
+}

cmd/erasure-utils.go

@@ -21,6 +21,7 @@ import (
 	"io"
 
 	"github.com/klauspost/reedsolomon"
+	"github.com/minio/minio/pkg/errors"
 )
 
 // getDataBlockLen - get length of data blocks from encoded blocks.
@@ -38,17 +39,17 @@ func getDataBlockLen(enBlocks [][]byte, dataBlocks int) int {
 func writeDataBlocks(dst io.Writer, enBlocks [][]byte, dataBlocks int, offset int64, length int64) (int64, error) {
 	// Offset and out size cannot be negative.
 	if offset < 0 || length < 0 {
-		return 0, traceError(errUnexpected)
+		return 0, errors.Trace(errUnexpected)
 	}
 
 	// Do we have enough blocks?
 	if len(enBlocks) < dataBlocks {
-		return 0, traceError(reedsolomon.ErrTooFewShards)
+		return 0, errors.Trace(reedsolomon.ErrTooFewShards)
 	}
 
 	// Do we have enough data?
 	if int64(getDataBlockLen(enBlocks, dataBlocks)) < length {
-		return 0, traceError(reedsolomon.ErrShortData)
+		return 0, errors.Trace(reedsolomon.ErrShortData)
 	}
 
 	// Counter to decrement total left to write.
@@ -76,7 +77,7 @@ func writeDataBlocks(dst io.Writer, enBlocks [][]byte, dataBlocks int, offset in
 		if write < int64(len(block)) {
 			n, err := io.Copy(dst, bytes.NewReader(block[:write]))
 			if err != nil {
-				return 0, traceError(err)
+				return 0, errors.Trace(err)
 			}
 			totalWritten += n
 			break
@@ -84,7 +85,7 @@ func writeDataBlocks(dst io.Writer, enBlocks [][]byte, dataBlocks int, offset in
 		// Copy the block.
 		n, err := io.Copy(dst, bytes.NewReader(block))
 		if err != nil {
-			return 0, traceError(err)
+			return 0, errors.Trace(err)
 		}
 
 		// Decrement output size.
@@ -97,11 +98,3 @@ func writeDataBlocks(dst io.Writer, enBlocks [][]byte, dataBlocks int, offset in
 	// Success.
 	return totalWritten, nil
 }
-
-// chunkSize is roughly BlockSize/DataBlocks.
-// chunkSize is calculated such that chunkSize*DataBlocks accommodates BlockSize bytes.
-// So chunkSize*DataBlocks can be slightly larger than BlockSize if BlockSize is not divisible by
-// DataBlocks. The extra space will have 0-padding.
-func getChunkSize(blockSize int64, dataBlocks int) int64 {
-	return (blockSize + int64(dataBlocks) - 1) / int64(dataBlocks)
-}

cmd/erasure-utils_test.go

@@ -1,53 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import "testing"
-
-// Tests validate the output of getChunkSize.
-func TestGetChunkSize(t *testing.T) {
-	// Refer to comments on getChunkSize() for details.
-	testCases := []struct {
-		blockSize  int64
-		dataBlocks int
-		// expected result.
-		expectedChunkSize int64
-	}{
-		{
-			10,
-			10,
-			1,
-		},
-		{
-			10,
-			11,
-			1,
-		},
-		{
-			10,
-			9,
-			2,
-		},
-	}
-	// Verify getChunkSize() for the test cases.
-	for i, testCase := range testCases {
-		got := getChunkSize(testCase.blockSize, testCase.dataBlocks)
-		if testCase.expectedChunkSize != got {
-			t.Errorf("Test %d : expected=%d got=%d", i+1, testCase.expectedChunkSize, got)
-		}
-	}
-}

cmd/erasure.go

@@ -21,6 +21,7 @@ import (
 	"hash"
 
 	"github.com/klauspost/reedsolomon"
+	"github.com/minio/minio/pkg/errors"
 )
 
 // OfflineDisk represents an unavailable disk.
@@ -43,10 +44,11 @@ type ErasureStorage struct {
 
 // NewErasureStorage creates a new ErasureStorage. The storage erasure codes and protects all data written to
 // the disks.
-func NewErasureStorage(disks []StorageAPI, dataBlocks, parityBlocks int) (s ErasureStorage, err error) {
-	erasure, err := reedsolomon.New(dataBlocks, parityBlocks)
+func NewErasureStorage(disks []StorageAPI, dataBlocks, parityBlocks int, blockSize int64) (s ErasureStorage, err error) {
+	shardsize := (int(blockSize) + dataBlocks - 1) / dataBlocks
+	erasure, err := reedsolomon.New(dataBlocks, parityBlocks, reedsolomon.WithAutoGoroutines(shardsize))
 	if err != nil {
-		return s, traceErrorf("failed to create erasure coding: %v", err)
+		return s, errors.Tracef("failed to create erasure coding: %v", err)
 	}
 	s = ErasureStorage{
 		disks:        make([]StorageAPI, len(disks)),
@@ -63,10 +65,10 @@ func NewErasureStorage(disks []StorageAPI, dataBlocks, parityBlocks int) (s Eras
 func (s *ErasureStorage) ErasureEncode(data []byte) ([][]byte, error) {
 	encoded, err := s.erasure.Split(data)
 	if err != nil {
-		return nil, traceErrorf("failed to split data: %v", err)
+		return nil, errors.Tracef("failed to split data: %v", err)
 	}
 	if err = s.erasure.Encode(encoded); err != nil {
-		return nil, traceErrorf("failed to encode data: %v", err)
+		return nil, errors.Tracef("failed to encode data: %v", err)
 	}
 	return encoded, nil
 }
@@ -76,7 +78,7 @@ func (s *ErasureStorage) ErasureEncode(data []byte) ([][]byte, error) {
 // It returns an error if the decoding failed.
 func (s *ErasureStorage) ErasureDecodeDataBlocks(data [][]byte) error {
 	if err := s.erasure.ReconstructData(data); err != nil {
-		return traceErrorf("failed to reconstruct data: %v", err)
+		return errors.Tracef("failed to reconstruct data: %v", err)
 	}
 	return nil
 }
@@ -85,7 +87,7 @@ func (s *ErasureStorage) ErasureDecodeDataBlocks(data [][]byte) error {
 // It returns an error if the decoding failed.
 func (s *ErasureStorage) ErasureDecodeDataAndParityBlocks(data [][]byte) error {
 	if err := s.erasure.Reconstruct(data); err != nil {
-		return traceErrorf("failed to reconstruct data: %v", err)
+		return errors.Tracef("failed to reconstruct data: %v", err)
 	}
 	return nil
 }

cmd/erasure_test.go

@@ -52,7 +52,7 @@ func TestErasureDecode(t *testing.T) {
 		copy(buffer, data)
 
 		disks := make([]StorageAPI, test.dataBlocks+test.parityBlocks)
-		storage, err := NewErasureStorage(disks, test.dataBlocks, test.parityBlocks)
+		storage, err := NewErasureStorage(disks, test.dataBlocks, test.parityBlocks, blockSizeV1)
 		if err != nil {
 			t.Fatalf("Test %d: failed to create erasure storage: %v", i, err)
 		}

cmd/errors.go

@@ -1,158 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"runtime"
-	"strings"
-)
-
-// Holds the current directory path. Used for trimming path in traceError()
-var rootPath string
-
-// Figure out the rootPath
-func initError() {
-	// Root path is automatically determined from the calling function's source file location.
-	// Catch the calling function's source file path.
-	_, file, _, _ := runtime.Caller(1)
-	// Save the directory alone.
-	rootPath = filepath.Dir(file)
-}
-
-// Represents a stack frame in the stack trace.
-type traceInfo struct {
-	file string // File where error occurred
-	line int    // Line where error occurred
-	name string // Name of the function where error occurred
-}
-
-// Error - error type containing cause and the stack trace.
-type Error struct {
-	e     error       // Holds the cause error
-	trace []traceInfo // stack trace
-	errs  []error     // Useful for XL to hold errors from all disks
-}
-
-// Implement error interface.
-func (e Error) Error() string {
-	return e.e.Error()
-}
-
-// Trace - returns stack trace.
-func (e Error) Trace() []string {
-	var traceArr []string
-	for _, info := range e.trace {
-		traceArr = append(traceArr, fmt.Sprintf("%s:%d:%s",
-			info.file, info.line, info.name))
-	}
-	return traceArr
-}
-
-// NewStorageError - return new Error type.
-func traceError(e error, errs ...error) error {
-	if e == nil {
-		return nil
-	}
-	err := &Error{}
-	err.e = e
-	err.errs = errs
-
-	stack := make([]uintptr, 40)
-	length := runtime.Callers(2, stack)
-	if length > len(stack) {
-		length = len(stack)
-	}
-	stack = stack[:length]
-
-	for _, pc := range stack {
-		pc = pc - 1
-		fn := runtime.FuncForPC(pc)
-		file, line := fn.FileLine(pc)
-		name := fn.Name()
-		if hasSuffix(name, "ServeHTTP") {
-			break
-		}
-		if hasSuffix(name, "runtime.") {
-			break
-		}
-
-		file = strings.TrimPrefix(file, rootPath+string(os.PathSeparator))
-		name = strings.TrimPrefix(name, "github.com/minio/minio/cmd.")
-		err.trace = append(err.trace, traceInfo{file, line, name})
-	}
-
-	return err
-}
-
-// Returns the underlying cause error.
-func errorCause(err error) error {
-	if e, ok := err.(*Error); ok {
-		err = e.e
-	}
-	return err
-}
-
-// Returns slice of underlying cause error.
-func errorsCause(errs []error) []error {
-	cerrs := make([]error, len(errs))
-	for i, err := range errs {
-		if err == nil {
-			continue
-		}
-		cerrs[i] = errorCause(err)
-	}
-	return cerrs
-}
-
-// Collection of basic errors.
-var baseErrs = []error{
-	errDiskNotFound,
-	errFaultyDisk,
-	errFaultyRemoteDisk,
-}
-
-var baseIgnoredErrs = baseErrs
-
-// isErrIgnored returns whether given error is ignored or not.
-func isErrIgnored(err error, ignoredErrs ...error) bool {
-	err = errorCause(err)
-	for _, ignoredErr := range ignoredErrs {
-		if ignoredErr == err {
-			return true
-		}
-	}
-	return false
-}
-
-// isErr returns whether given error is exact error.
-func isErr(err error, errs ...error) bool {
-	err = errorCause(err)
-	for _, exactErr := range errs {
-		if err == exactErr {
-			return true
-		}
-	}
-	return false
-}
-
-// traceErrorf behaves like fmt.traceErrorf but also traces the returned error.
-func traceErrorf(format string, args ...interface{}) error {
-	return traceError(fmt.Errorf(format, args...))
-}

cmd/event-notifier.go

@@ -27,6 +27,7 @@ import (
 	"sync"
 
 	"github.com/Sirupsen/logrus"
+	"github.com/minio/minio/pkg/errors"
 	"github.com/minio/minio/pkg/hash"
 )
 
@@ -60,7 +61,7 @@ type internalNotifier struct {
 	// Connected listeners is a map of listener ARNs to channels
 	// on which the ListenBucket API handler go routine is waiting
 	// for events to send to a client.
-	connectedListeners map[string]chan []NotificationEvent
+	connectedListeners map[string]*listenChan
 
 	rwMutex *sync.RWMutex
 }
@@ -106,10 +107,10 @@ func newNotificationEvent(event eventData) NotificationEvent {
 	}
 
 	// Fetch the region.
-	region := serverConfig.GetRegion()
+	region := globalServerConfig.GetRegion()
 
 	// Fetch the credentials.
-	creds := serverConfig.GetCredential()
+	creds := globalServerConfig.GetCredential()
 
 	// Time when Minio finished processing the request.
 	eventTime := UTCNow()
@@ -167,13 +168,13 @@ func newNotificationEvent(event eventData) NotificationEvent {
 
 	// For all other events we should set ETag and Size.
 	nEvent.S3.Object = objectMeta{
-		Key:         escapedObj,
-		ETag:        event.ObjInfo.ETag,
-		Size:        event.ObjInfo.Size,
-		ContentType: event.ObjInfo.ContentType,
-		UserDefined: event.ObjInfo.UserDefined,
-		VersionID:   "1",
-		Sequencer:   uniqueID,
+		Key:          escapedObj,
+		ETag:         event.ObjInfo.ETag,
+		Size:         event.ObjInfo.Size,
+		ContentType:  event.ObjInfo.ContentType,
+		UserMetadata: event.ObjInfo.UserDefined,
+		VersionID:    "1",
+		Sequencer:    uniqueID,
 	}
 
 	// Success.
@@ -206,7 +207,7 @@ func (en eventNotifier) GetInternalTarget(arn string) *listenerLogger {
 }
 
 // Set a new sns target for an input sns ARN.
-func (en *eventNotifier) AddListenerChan(snsARN string, listenerCh chan []NotificationEvent) error {
+func (en *eventNotifier) AddListenerChan(snsARN string, listenerCh *listenChan) error {
 	if listenerCh == nil {
 		return errInvalidArgument
 	}
@@ -229,9 +230,9 @@ func (en *eventNotifier) SendListenerEvent(arn string, event []NotificationEvent
 	en.internal.rwMutex.Lock()
 	defer en.internal.rwMutex.Unlock()
 
-	ch, ok := en.internal.connectedListeners[arn]
+	listenChan, ok := en.internal.connectedListeners[arn]
 	if ok {
-		ch <- event
+		listenChan.sendNotificationEvent(event)
 	}
 	// If the channel is not present we ignore the event.
 	return nil
@@ -364,21 +365,14 @@ func loadNotificationConfig(bucket string, objAPI ObjectLayer) (*notificationCon
 	// Construct the notification config path.
 	ncPath := path.Join(bucketConfigPrefix, bucket, bucketNotificationConfig)
 
-	// Acquire a write lock on notification config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, ncPath)
-	if err := objLock.GetRLock(globalOperationTimeout); err != nil {
-		return nil, err
-	}
-	defer objLock.RUnlock()
-
 	var buffer bytes.Buffer
-	err := objAPI.GetObject(minioMetaBucket, ncPath, 0, -1, &buffer) // Read everything.
+	err := objAPI.GetObject(minioMetaBucket, ncPath, 0, -1, &buffer, "") // Read everything.
 	if err != nil {
 		// 'notification.xml' not found return
 		// 'errNoSuchNotifications'.  This is default when no
 		// bucket notifications are found on the bucket.
 		if isErrObjectNotFound(err) || isErrIncompleteBody(err) {
-			return nil, traceError(errNoSuchNotifications)
+			return nil, errors.Trace(errNoSuchNotifications)
 		}
 		errorIf(err, "Unable to load bucket-notification for bucket %s", bucket)
 		// Returns error for other errors.
@@ -387,7 +381,7 @@ func loadNotificationConfig(bucket string, objAPI ObjectLayer) (*notificationCon
 
 	// if `notifications.xml` is empty we should return NoSuchNotifications.
 	if buffer.Len() == 0 {
-		return nil, traceError(errNoSuchNotifications)
+		return nil, errors.Trace(errNoSuchNotifications)
 	}
 
 	// Unmarshal notification bytes.
@@ -395,7 +389,7 @@ func loadNotificationConfig(bucket string, objAPI ObjectLayer) (*notificationCon
 	notificationCfg := &notificationConfig{}
 	// Unmarshal notification bytes only if we read data.
 	if err = xml.Unmarshal(notificationConfigBytes, notificationCfg); err != nil {
-		return nil, traceError(err)
+		return nil, errors.Trace(err)
 	}
 
 	// Return success.
@@ -415,21 +409,14 @@ func loadListenerConfig(bucket string, objAPI ObjectLayer) ([]listenerConfig, er
 	// Construct the notification config path.
 	lcPath := path.Join(bucketConfigPrefix, bucket, bucketListenerConfig)
 
-	// Acquire a write lock on notification config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, lcPath)
-	if err := objLock.GetRLock(globalOperationTimeout); err != nil {
-		return nil, err
-	}
-	defer objLock.RUnlock()
-
 	var buffer bytes.Buffer
-	err := objAPI.GetObject(minioMetaBucket, lcPath, 0, -1, &buffer)
+	err := objAPI.GetObject(minioMetaBucket, lcPath, 0, -1, &buffer, "")
 	if err != nil {
 		// 'listener.json' not found return
 		// 'errNoSuchNotifications'.  This is default when no
 		// bucket listeners are found on the bucket
 		if isErrObjectNotFound(err) || isErrIncompleteBody(err) {
-			return nil, traceError(errNoSuchNotifications)
+			return nil, errors.Trace(errNoSuchNotifications)
 		}
 		errorIf(err, "Unable to load bucket-listeners for bucket %s", bucket)
 		// Returns error for other errors.
@@ -438,14 +425,14 @@ func loadListenerConfig(bucket string, objAPI ObjectLayer) ([]listenerConfig, er
 
 	// if `listener.json` is empty we should return NoSuchNotifications.
 	if buffer.Len() == 0 {
-		return nil, traceError(errNoSuchNotifications)
+		return nil, errors.Trace(errNoSuchNotifications)
 	}
 
 	var lCfg []listenerConfig
 	lConfigBytes := buffer.Bytes()
 	if err = json.Unmarshal(lConfigBytes, &lCfg); err != nil {
 		errorIf(err, "Unable to unmarshal listener config from JSON.")
-		return nil, traceError(err)
+		return nil, errors.Trace(err)
 	}
 
 	// Return success.
@@ -462,12 +449,6 @@ func persistNotificationConfig(bucket string, ncfg *notificationConfig, obj Obje
 
 	// build path
 	ncPath := path.Join(bucketConfigPrefix, bucket, bucketNotificationConfig)
-	// Acquire a write lock on notification config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, ncPath)
-	if err = objLock.GetLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	defer objLock.Unlock()
 
 	// write object to path
 	hashReader, err := hash.NewReader(bytes.NewReader(buf), int64(len(buf)), "", getSHA256Hash(buf))
@@ -493,12 +474,6 @@ func persistListenerConfig(bucket string, lcfg []listenerConfig, obj ObjectLayer
 
 	// build path
 	lcPath := path.Join(bucketConfigPrefix, bucket, bucketListenerConfig)
-	// Acquire a write lock on notification config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, lcPath)
-	if err = objLock.GetLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	defer objLock.Unlock()
 
 	// write object to path
 	hashReader, err := hash.NewReader(bytes.NewReader(buf), int64(len(buf)), "", getSHA256Hash(buf))
@@ -525,12 +500,6 @@ func removeNotificationConfig(bucket string, objAPI ObjectLayer) error {
 
 	ncPath := path.Join(bucketConfigPrefix, bucket, bucketNotificationConfig)
 
-	// Acquire a write lock on notification config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, ncPath)
-	if err := objLock.GetLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	defer objLock.Unlock()
 	return objAPI.DeleteObject(minioMetaBucket, ncPath)
 }
 
@@ -539,12 +508,6 @@ func removeListenerConfig(bucket string, objAPI ObjectLayer) error {
 	// make the path
 	lcPath := path.Join(bucketConfigPrefix, bucket, bucketListenerConfig)
 
-	// Acquire a write lock on notification config before modifying.
-	objLock := globalNSMutex.NewNSLock(minioMetaBucket, lcPath)
-	if err := objLock.GetLock(globalOperationTimeout); err != nil {
-		return err
-	}
-	defer objLock.Unlock()
 	return objAPI.DeleteObject(minioMetaBucket, lcPath)
 }
 
@@ -552,13 +515,13 @@ func removeListenerConfig(bucket string, objAPI ObjectLayer) error {
 func loadNotificationAndListenerConfig(bucketName string, objAPI ObjectLayer) (nCfg *notificationConfig, lCfg []listenerConfig, err error) {
 	// Loads notification config if any.
 	nCfg, err = loadNotificationConfig(bucketName, objAPI)
-	if err != nil && !isErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
+	if err != nil && !errors.IsErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
 		return nil, nil, err
 	}
 
 	// Loads listener config if any.
 	lCfg, err = loadListenerConfig(bucketName, objAPI)
-	if err != nil && !isErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
+	if err != nil && !errors.IsErrIgnored(err, errDiskNotFound, errNoSuchNotifications) {
 		return nil, nil, err
 	}
 	return nCfg, lCfg, nil
@@ -595,7 +558,7 @@ func addQueueTarget(queueTargets map[string]*logrus.Logger,
 	newTargetFunc func(string) (*logrus.Logger, error)) (string, error) {
 
 	// Construct the queue ARN for AMQP.
-	queueARN := minioSqs + serverConfig.GetRegion() + ":" + accountID + ":" + queueType
+	queueARN := minioSqs + globalServerConfig.GetRegion() + ":" + accountID + ":" + queueType
 
 	// Queue target if already initialized we move to the next ARN.
 	if _, ok := queueTargets[queueARN]; ok {
@@ -618,7 +581,7 @@ func addQueueTarget(queueTargets map[string]*logrus.Logger,
 func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	queueTargets := make(map[string]*logrus.Logger)
 	// Load all amqp targets, initialize their respective loggers.
-	for accountID, amqpN := range serverConfig.Notify.GetAMQP() {
+	for accountID, amqpN := range globalServerConfig.Notify.GetAMQP() {
 		if !amqpN.Enable {
 			continue
 		}
@@ -637,7 +600,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load all mqtt targets, initialize their respective loggers.
-	for accountID, mqttN := range serverConfig.Notify.GetMQTT() {
+	for accountID, mqttN := range globalServerConfig.Notify.GetMQTT() {
 		if !mqttN.Enable {
 			continue
 		}
@@ -656,7 +619,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load all nats targets, initialize their respective loggers.
-	for accountID, natsN := range serverConfig.Notify.GetNATS() {
+	for accountID, natsN := range globalServerConfig.Notify.GetNATS() {
 		if !natsN.Enable {
 			continue
 		}
@@ -675,7 +638,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load redis targets, initialize their respective loggers.
-	for accountID, redisN := range serverConfig.Notify.GetRedis() {
+	for accountID, redisN := range globalServerConfig.Notify.GetRedis() {
 		if !redisN.Enable {
 			continue
 		}
@@ -694,7 +657,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load Webhook targets, initialize their respective loggers.
-	for accountID, webhookN := range serverConfig.Notify.GetWebhook() {
+	for accountID, webhookN := range globalServerConfig.Notify.GetWebhook() {
 		if !webhookN.Enable {
 			continue
 		}
@@ -704,7 +667,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load elastic targets, initialize their respective loggers.
-	for accountID, elasticN := range serverConfig.Notify.GetElasticSearch() {
+	for accountID, elasticN := range globalServerConfig.Notify.GetElasticSearch() {
 		if !elasticN.Enable {
 			continue
 		}
@@ -723,7 +686,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load PostgreSQL targets, initialize their respective loggers.
-	for accountID, pgN := range serverConfig.Notify.GetPostgreSQL() {
+	for accountID, pgN := range globalServerConfig.Notify.GetPostgreSQL() {
 		if !pgN.Enable {
 			continue
 		}
@@ -742,7 +705,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load MySQL targets, initialize their respective loggers.
-	for accountID, msqlN := range serverConfig.Notify.GetMySQL() {
+	for accountID, msqlN := range globalServerConfig.Notify.GetMySQL() {
 		if !msqlN.Enable {
 			continue
 		}
@@ -761,7 +724,7 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 	}
 
 	// Load Kafka targets, initialize their respective loggers.
-	for accountID, kafkaN := range serverConfig.Notify.GetKafka() {
+	for accountID, kafkaN := range globalServerConfig.Notify.GetKafka() {
 		if !kafkaN.Enable {
 			continue
 		}
@@ -833,7 +796,7 @@ func initEventNotifier(objAPI ObjectLayer) error {
 			rwMutex:            &sync.RWMutex{},
 			targets:            listenTargets,
 			listenerConfigs:    lConfigs,
-			connectedListeners: make(map[string]chan []NotificationEvent),
+			connectedListeners: make(map[string]*listenChan),
 		},
 	}
 

cmd/event-notifier_test.go

@@ -23,6 +23,8 @@ import (
 	"reflect"
 	"testing"
 	"time"
+
+	"github.com/minio/minio/pkg/errors"
 )
 
 // Test InitEventNotifier with faulty disks
@@ -35,7 +37,7 @@ func TestInitEventNotifierFaultyDisks(t *testing.T) {
 	// remove the root directory after the test ends.
 	defer os.RemoveAll(rootPath)
 
-	disks, err := getRandomDisks(4)
+	disks, err := getRandomDisks(16)
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
@@ -62,16 +64,17 @@ func TestInitEventNotifierFaultyDisks(t *testing.T) {
 	notificationXML += "</NotificationConfiguration>"
 	size := int64(len([]byte(notificationXML)))
 	reader := bytes.NewReader([]byte(notificationXML))
-	if _, err := xl.PutObject(minioMetaBucket, bucketConfigPrefix+"/"+bucketName+"/"+bucketNotificationConfig, mustGetHashReader(t, reader, size, "", ""), nil); err != nil {
+	bucketConfigPath := bucketConfigPrefix + "/" + bucketName + "/" + bucketNotificationConfig
+	if _, err := xl.PutObject(minioMetaBucket, bucketConfigPath, mustGetHashReader(t, reader, size, "", ""), nil); err != nil {
 		t.Fatal("Unexpected error:", err)
 	}
 
 	for i, d := range xl.storageDisks {
-		xl.storageDisks[i] = newNaughtyDisk(d.(*retryStorage), nil, errFaultyDisk)
+		xl.storageDisks[i] = newNaughtyDisk(d, nil, errFaultyDisk)
 	}
 	// Test initEventNotifier() with faulty disks
 	for i := 1; i <= 3; i++ {
-		if err := initEventNotifier(xl); errorCause(err) != errFaultyDisk {
+		if err := initEventNotifier(xl); errors.Cause(err) != errFaultyDisk {
 			t.Fatal("Unexpected error:", err)
 		}
 	}
@@ -98,7 +101,7 @@ func TestInitEventNotifierWithPostgreSQL(t *testing.T) {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
 
-	serverConfig.Notify.SetPostgreSQLByID("1", postgreSQLNotify{Enable: true})
+	globalServerConfig.Notify.SetPostgreSQLByID("1", postgreSQLNotify{Enable: true})
 	if err := initEventNotifier(fs); err == nil {
 		t.Fatal("PostgreSQL config didn't fail.")
 	}
@@ -125,7 +128,7 @@ func TestInitEventNotifierWithNATS(t *testing.T) {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
 
-	serverConfig.Notify.SetNATSByID("1", natsNotify{Enable: true})
+	globalServerConfig.Notify.SetNATSByID("1", natsNotify{Enable: true})
 	if err := initEventNotifier(fs); err == nil {
 		t.Fatal("NATS config didn't fail.")
 	}
@@ -152,7 +155,7 @@ func TestInitEventNotifierWithWebHook(t *testing.T) {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
 
-	serverConfig.Notify.SetWebhookByID("1", webhookNotify{Enable: true})
+	globalServerConfig.Notify.SetWebhookByID("1", webhookNotify{Enable: true})
 	if err := initEventNotifier(fs); err == nil {
 		t.Fatal("WebHook config didn't fail.")
 	}
@@ -179,7 +182,7 @@ func TestInitEventNotifierWithAMQP(t *testing.T) {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
 
-	serverConfig.Notify.SetAMQPByID("1", amqpNotify{Enable: true})
+	globalServerConfig.Notify.SetAMQPByID("1", amqpNotify{Enable: true})
 	if err := initEventNotifier(fs); err == nil {
 		t.Fatal("AMQP config didn't fail.")
 	}
@@ -206,7 +209,7 @@ func TestInitEventNotifierWithElasticSearch(t *testing.T) {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
 
-	serverConfig.Notify.SetElasticSearchByID("1", elasticSearchNotify{Enable: true})
+	globalServerConfig.Notify.SetElasticSearchByID("1", elasticSearchNotify{Enable: true})
 	if err := initEventNotifier(fs); err == nil {
 		t.Fatal("ElasticSearch config didn't fail.")
 	}
@@ -233,7 +236,7 @@ func TestInitEventNotifierWithRedis(t *testing.T) {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
 
-	serverConfig.Notify.SetRedisByID("1", redisNotify{Enable: true})
+	globalServerConfig.Notify.SetRedisByID("1", redisNotify{Enable: true})
 	if err := initEventNotifier(fs); err == nil {
 		t.Fatal("Redis config didn't fail.")
 	}
@@ -415,7 +418,7 @@ func TestListenBucketNotification(t *testing.T) {
 
 	listenARN := fmt.Sprintf("%s:%s:1:%s-%s",
 		minioTopic,
-		serverConfig.GetRegion(),
+		globalServerConfig.GetRegion(),
 		snsTypeMinio,
 		s.testServer.Server.Listener.Addr(),
 	)
@@ -462,11 +465,9 @@ func TestListenBucketNotification(t *testing.T) {
 	}
 
 	// Create a new notification event channel.
-	nEventCh := make(chan []NotificationEvent)
-	// Close the listener channel.
-	defer close(nEventCh)
+	nListenCh := newListenChan()
 	// Add events channel for listener.
-	if err := globalEventNotifier.AddListenerChan(listenARN, nEventCh); err != nil {
+	if err := globalEventNotifier.AddListenerChan(listenARN, nListenCh); err != nil {
 		t.Fatalf("Test Setup error: %v", err)
 	}
 	// Remove listen channel after the writer has closed or the
@@ -489,7 +490,7 @@ func TestListenBucketNotification(t *testing.T) {
 	// Wait for the event notification here, if nothing is received within 30 seconds,
 	// test error will be fired
 	select {
-	case n := <-nEventCh:
+	case n := <-nListenCh.dataCh:
 		// Check that received event
 		if len(n) == 0 {
 			t.Fatal("Unexpected error occurred")
@@ -497,9 +498,7 @@ func TestListenBucketNotification(t *testing.T) {
 		if n[0].S3.Object.Key != objectName {
 			t.Fatalf("Received wrong object name in notification, expected %s, received %s", n[0].S3.Object.Key, objectName)
 		}
-		break
 	case <-time.After(3 * time.Second):
-		break
 	}
 
 }
@@ -527,7 +526,7 @@ func TestAddRemoveBucketListenerConfig(t *testing.T) {
 	accountID := fmt.Sprintf("%d", UTCNow().UnixNano())
 	accountARN := fmt.Sprintf(
 		"arn:minio:sqs:%s:%s:listen-%s",
-		serverConfig.GetRegion(),
+		globalServerConfig.GetRegion(),
 		accountID,
 		globalMinioAddr,
 	)

cmd/file-logger.go

@@ -1,86 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2017 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"fmt"
-	"os"
-
-	"github.com/Sirupsen/logrus"
-)
-
-// FileLogger - file logger which logs to a file.
-type FileLogger struct {
-	BaseLogTarget
-	Filename string `json:"filename"`
-	file     *os.File
-}
-
-// Fire - log entry handler.
-func (logger FileLogger) Fire(entry *logrus.Entry) (err error) {
-	if !logger.Enable {
-		return nil
-	}
-
-	msgBytes, err := logger.formatter.Format(entry)
-	if err != nil {
-		return err
-	}
-
-	if _, err = logger.file.Write(msgBytes); err != nil {
-		return err
-	}
-
-	err = logger.file.Sync()
-	return err
-}
-
-// String - represents ConsoleLogger as string.
-func (logger FileLogger) String() string {
-	enableStr := "disabled"
-	if logger.Enable {
-		enableStr = "enabled"
-	}
-
-	return fmt.Sprintf("file:%s:%s", enableStr, logger.Filename)
-}
-
-// NewFileLogger - creates new file logger object.
-func NewFileLogger(filename string) (logger FileLogger) {
-	logger.Enable = true
-	logger.formatter = new(logrus.JSONFormatter)
-	logger.Filename = filename
-
-	return logger
-}
-
-// InitFileLogger - initializes file logger.
-func InitFileLogger(logger *FileLogger) (err error) {
-	if !logger.Enable {
-		return err
-	}
-
-	if logger.formatter == nil {
-		logger.formatter = new(logrus.JSONFormatter)
-	}
-
-	if logger.file == nil {
-		logger.file, err = os.OpenFile(logger.Filename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0664)
-	}
-
-	return err
-}

cmd/format-config-v1.go

@@ -1,905 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package cmd
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"reflect"
-	"sync"
-
-	"github.com/minio/minio/pkg/lock"
-)
-
-// fsFormat - structure holding 'fs' format.
-type fsFormat struct {
-	Version string `json:"version"`
-}
-
-// FS format version strings.
-const (
-	// Represents the current backend disk structure
-	// version under `.minio.sys` and actual data namespace.
-
-	// formatConfigV1.fsFormat.Version
-	fsFormatBackendV1 = "1"
-)
-
-// xlFormat - structure holding 'xl' format.
-type xlFormat struct {
-	Version string `json:"version"` // Version of 'xl' format.
-	Disk    string `json:"disk"`    // Disk field carries assigned disk uuid.
-	// JBOD field carries the input disk order generated the first
-	// time when fresh disks were supplied.
-	JBOD []string `json:"jbod"`
-}
-
-// XL format version strings.
-const (
-	// Represents the current backend disk structure
-	// version under `.minio.sys` and actual data namespace.
-
-	// formatConfigV1.xlFormat.Version
-	xlFormatBackendV1 = "1"
-)
-
-// formatConfigV1 - structure holds format config version '1'.
-type formatConfigV1 struct {
-	Version string `json:"version"` // Version of the format config.
-	// Format indicates the backend format type, supports two values 'xl' and 'fs'.
-	Format string    `json:"format"`
-	FS     *fsFormat `json:"fs,omitempty"` // FS field holds fs format.
-	XL     *xlFormat `json:"xl,omitempty"` // XL field holds xl format.
-}
-
-// Format json file.
-const (
-	// Format config file carries backend format specific details.
-	formatConfigFile = "format.json"
-
-	// Format config tmp file carries backend format.
-	formatConfigFileTmp = "format.json.tmp"
-)
-
-// `format.json` version value.
-const (
-	// formatConfigV1.Version represents the version string
-	// of the current structure and its fields in `format.json`.
-	formatFileV1 = "1"
-
-	// Future `format.json` structure changes should have
-	// its own version and should be subsequently listed here.
-)
-
-// Constitutes `format.json` backend name.
-const (
-	// Represents FS backend.
-	formatBackendFS = "fs"
-
-	// Represents XL backend.
-	formatBackendXL = "xl"
-)
-
-// CheckFS if the format is FS and is valid with right values
-// returns appropriate errors otherwise.
-func (f *formatConfigV1) CheckFS() error {
-	// Validate if format config version is v1.
-	if f.Version != formatFileV1 {
-		return fmt.Errorf("Unknown format file version '%s'", f.Version)
-	}
-
-	// Validate if we have the expected format.
-	if f.Format != formatBackendFS {
-		return fmt.Errorf("FS backend format required. Found '%s'", f.Format)
-	}
-
-	// Check if format is currently supported.
-	if f.FS.Version != fsFormatBackendV1 {
-		return fmt.Errorf("Unknown backend FS format version '%s'", f.FS.Version)
-	}
-
-	// Success.
-	return nil
-}
-
-// LoadFormat - loads format config v1, returns `errUnformattedDisk`
-// if reading format.json fails with io.EOF.
-func (f *formatConfigV1) LoadFormat(lk *lock.LockedFile) error {
-	_, err := f.ReadFrom(lk)
-	if errorCause(err) == io.EOF {
-		// No data on disk `format.json` still empty
-		// treat it as unformatted disk.
-		return traceError(errUnformattedDisk)
-	}
-	return err
-}
-
-func (f *formatConfigV1) WriteTo(lk *lock.LockedFile) (n int64, err error) {
-	// Serialize to prepare to write to disk.
-	var fbytes []byte
-	fbytes, err = json.Marshal(f)
-	if err != nil {
-		return 0, traceError(err)
-	}
-	if err = lk.Truncate(0); err != nil {
-		return 0, traceError(err)
-	}
-	_, err = lk.Write(fbytes)
-	if err != nil {
-		return 0, traceError(err)
-	}
-	return int64(len(fbytes)), nil
-}
-
-func (f *formatConfigV1) ReadFrom(lk *lock.LockedFile) (n int64, err error) {
-	var fbytes []byte
-	fi, err := lk.Stat()
-	if err != nil {
-		return 0, traceError(err)
-	}
-	fbytes, err = ioutil.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
-	if err != nil {
-		return 0, traceError(err)
-	}
-	if len(fbytes) == 0 {
-		return 0, traceError(io.EOF)
-	}
-	// Decode `format.json`.
-	if err = json.Unmarshal(fbytes, f); err != nil {
-		return 0, traceError(err)
-	}
-	return int64(len(fbytes)), nil
-}
-
-func newFSFormat() (format *formatConfigV1) {
-	return newFSFormatV1()
-}
-
-// newFSFormatV1 - initializes new formatConfigV1 with FS format info.
-func newFSFormatV1() (format *formatConfigV1) {
-	return &formatConfigV1{
-		Version: formatFileV1,
-		Format:  formatBackendFS,
-		FS: &fsFormat{
-			Version: fsFormatBackendV1,
-		},
-	}
-}
-
-/*
-
-All disks online
------------------
-- All Unformatted - format all and return success.
-- Some Unformatted - format all and return success.
-- Any JBOD inconsistent - return failure // Requires deep inspection, phase2.
-- Some are corrupt (missing format.json) - return failure  // Requires deep inspection, phase2.
-- Any unrecognized disks - return failure
-
-Some disks are offline and we have quorum.
------------------
-- Some unformatted - no heal, return success.
-- Any JBOD inconsistent - return failure // Requires deep inspection, phase2.
-- Some are corrupt (missing format.json) - return failure  // Requires deep inspection, phase2.
-- Any unrecognized disks - return failure
-
-No read quorum
------------------
-failure for all cases.
-
-// Pseudo code for managing `format.json`.
-
-// Generic checks.
-if (no quorum) return error
-if (any disk is corrupt) return error // phase2
-if (jbod inconsistent) return error // phase2
-if (disks not recognized) // Always error.
-
-// Specific checks.
-if (all disks online)
-  if (all disks return format.json)
-     if (jbod consistent)
-        if (all disks recognized)
-          return
-  else
-     if (all disks return format.json not found)
-        (initialize format)
-        return
-     else (some disks return format.json not found)
-        (heal format)
-        return
-     fi
-   fi
-else // No healing at this point forward, some disks are offline or dead.
-   if (some disks return format.json not found)
-      if (with force)
-         // Offline disks are marked as dead.
-         (heal format) // Offline disks should be marked as dead.
-         return success
-      else (without force)
-         // --force is necessary to heal few drives, because some drives
-         // are offline. Offline disks will be marked as dead.
-         return error
-      fi
-fi
-*/
-
-// error returned when some disks are offline.
-var errSomeDiskOffline = errors.New("some disks are offline")
-
-// errDiskOrderMismatch - returned when disk UUID is not in consistent JBOD order.
-var errDiskOrderMismatch = errors.New("disk order mismatch")
-
-// formatErrsSummary - summarizes errors into different classes
-func formatErrsSummary(errs []error) (formatCount, unformattedDiskCount,
-	diskNotFoundCount, corruptedFormatCount, otherErrCount int) {
-
-	for _, err := range errs {
-		switch err {
-		case errDiskNotFound:
-			diskNotFoundCount++
-		case errUnformattedDisk:
-			unformattedDiskCount++
-		case errCorruptedFormat:
-			corruptedFormatCount++
-		case nil:
-			// implies that format is not nil
-			formatCount++
-		default:
-			otherErrCount++
-		}
-	}
-	return
-}
-
-// loadAllFormats - load all format config from all input disks in parallel.
-func loadAllFormats(bootstrapDisks []StorageAPI) ([]*formatConfigV1, []error) {
-	// Initialize sync waitgroup.
-	var wg = &sync.WaitGroup{}
-
-	// Initialize list of errors.
-	var sErrs = make([]error, len(bootstrapDisks))
-
-	// Initialize format configs.
-	var formatConfigs = make([]*formatConfigV1, len(bootstrapDisks))
-
-	// Make a volume entry on all underlying storage disks.
-	for index, disk := range bootstrapDisks {
-		if disk == nil {
-			sErrs[index] = errDiskNotFound
-			continue
-		}
-		wg.Add(1)
-		// Make a volume inside a go-routine.
-		go func(index int, disk StorageAPI) {
-			defer wg.Done()
-			formatConfig, lErr := loadFormat(disk)
-			if lErr != nil {
-				sErrs[index] = lErr
-				return
-			}
-			formatConfigs[index] = formatConfig
-		}(index, disk)
-	}
-
-	// Wait for all make vol to finish.
-	wg.Wait()
-
-	for _, err := range sErrs {
-		if err != nil {
-			// Return all formats and errors.
-			return formatConfigs, sErrs
-		}
-	}
-	// Return all formats and nil
-	return formatConfigs, sErrs
-}
-
-// genericFormatCheckXL - validates and returns error.
-// if (no quorum) return error
-// if (any disk is corrupt) return error // phase2
-// if (jbod inconsistent) return error // phase2
-// if (disks not recognized) // Always error.
-func genericFormatCheckXL(formatConfigs []*formatConfigV1, sErrs []error) (err error) {
-	// Calculate the errors.
-	var (
-		errCorruptFormatCount = 0
-		errCount              = 0
-	)
-
-	// Through all errors calculate the actual errors.
-	for _, lErr := range sErrs {
-		if lErr == nil {
-			continue
-		}
-		// These errors are good conditions, means disk is online.
-		if lErr == errUnformattedDisk || lErr == errVolumeNotFound {
-			continue
-		}
-		if lErr == errCorruptedFormat {
-			errCorruptFormatCount++
-		} else {
-			errCount++
-		}
-	}
-
-	// Calculate read quorum.
-	readQuorum := len(formatConfigs) / 2
-
-	// Validate the err count under read quorum.
-	if errCount > len(formatConfigs)-readQuorum {
-		return errXLReadQuorum
-	}
-
-	// Check if number of corrupted format under read quorum
-	if errCorruptFormatCount > len(formatConfigs)-readQuorum {
-		return errCorruptedFormat
-	}
-
-	// Validates if format and JBOD are consistent across all disks.
-	if err = checkFormatXL(formatConfigs); err != nil {
-		return err
-	}
-
-	// Success..
-	return nil
-}
-
-// isSavedUUIDInOrder - validates if disk uuid is present and valid in all
-// available format config JBOD. This function also validates if the disk UUID
-// is always available on all JBOD under the same order.
-func isSavedUUIDInOrder(uuid string, formatConfigs []*formatConfigV1) bool {
-	var orderIndexes []int
-	// Validate each for format.json for relevant uuid.
-	for _, formatConfig := range formatConfigs {
-		if formatConfig == nil {
-			continue
-		}
-		// Validate if UUID is present in JBOD.
-		uuidIndex := findDiskIndex(uuid, formatConfig.XL.JBOD)
-		if uuidIndex == -1 {
-			// UUID not found.
-			errorIf(errDiskNotFound, "Disk %s not found in JBOD list", uuid)
-			return false
-		}
-		// Save the position of UUID present in JBOD.
-		orderIndexes = append(orderIndexes, uuidIndex+1)
-	}
-	// Once uuid is found, verify if the uuid
-	// present in same order across all format configs.
-	prevOrderIndex := orderIndexes[0]
-	for _, orderIndex := range orderIndexes {
-		if prevOrderIndex != orderIndex {
-			errorIf(errDiskOrderMismatch, "Disk %s is in wrong order wanted %d, saw %d ", uuid, prevOrderIndex, orderIndex)
-			return false
-		}
-	}
-	// Returns success, when we have verified if uuid
-	// is consistent and valid across all format configs.
-	return true
-}
-
-// checkDisksConsistency - checks if all disks are consistent with all JBOD entries on all disks.
-func checkDisksConsistency(formatConfigs []*formatConfigV1) error {
-	var disks = make([]string, len(formatConfigs))
-	// Collect currently available disk uuids.
-	for index, formatConfig := range formatConfigs {
-		if formatConfig == nil {
-			disks[index] = ""
-			continue
-		}
-		disks[index] = formatConfig.XL.Disk
-	}
-	// Validate collected uuids and verify JBOD.
-	for _, uuid := range disks {
-		if uuid == "" {
-			continue
-		}
-		// Is uuid present on all JBOD ?.
-		if !isSavedUUIDInOrder(uuid, formatConfigs) {
-			return fmt.Errorf("%s disk not found in JBOD", uuid)
-		}
-	}
-	return nil
-}
-
-// checkJBODConsistency - validate xl jbod order if they are consistent.
-func checkJBODConsistency(formatConfigs []*formatConfigV1) error {
-	var sentinelJBOD []string
-	// Extract first valid JBOD.
-	for _, format := range formatConfigs {
-		if format == nil {
-			continue
-		}
-		sentinelJBOD = format.XL.JBOD
-		break
-	}
-	for _, format := range formatConfigs {
-		if format == nil {
-			continue
-		}
-		currentJBOD := format.XL.JBOD
-		if !reflect.DeepEqual(sentinelJBOD, currentJBOD) {
-			return errors.New("Inconsistent JBOD found")
-		}
-	}
-	return nil
-}
-
-// findDiskIndex returns position of disk in JBOD.
-func findDiskIndex(disk string, jbod []string) int {
-	for index, uuid := range jbod {
-		if uuid == disk {
-			return index
-		}
-	}
-	return -1
-}
-
-// reorderDisks - reorder disks in JBOD order, and return reference
-// format-config. If assignUUIDs is true, it assigns UUIDs to disks
-// with missing format configurations in the reference configuration.
-func reorderDisks(bootstrapDisks []StorageAPI,
-	formatConfigs []*formatConfigV1, assignUUIDs bool) (*formatConfigV1,
-	[]StorageAPI, error) {
-
-	// Pick first non-nil format-cfg as reference
-	var refCfg *formatConfigV1
-	for _, formatConfig := range formatConfigs {
-		if formatConfig != nil {
-			refCfg = formatConfig
-			break
-		}
-	}
-	if refCfg == nil {
-		return nil, nil, fmt.Errorf("could not find any valid config")
-	}
-	refJBOD := refCfg.XL.JBOD
-
-	// construct reordered disk slice
-	var newDisks = make([]StorageAPI, len(bootstrapDisks))
-	for fIndex, format := range formatConfigs {
-		if format == nil {
-			continue
-		}
-		jIndex := findDiskIndex(format.XL.Disk, refJBOD)
-		if jIndex == -1 {
-			return nil, nil, errors.New("Unrecognized uuid " + format.XL.Disk + " found")
-		}
-		newDisks[jIndex] = bootstrapDisks[fIndex]
-	}
-
-	if assignUUIDs {
-		// Based on orderedDisks generate new UUIDs in the ref. config
-		// for disks without format-configs.
-		for index, disk := range newDisks {
-			if disk == nil {
-				refCfg.XL.JBOD[index] = mustGetUUID()
-			}
-		}
-	}
-
-	return refCfg, newDisks, nil
-}
-
-// loadFormat - loads format.json from disk.
-func loadFormat(disk StorageAPI) (format *formatConfigV1, err error) {
-	buf, err := disk.ReadAll(minioMetaBucket, formatConfigFile)
-	if err != nil {
-		// 'file not found' and 'volume not found' as
-		// same. 'volume not found' usually means its a fresh disk.
-		if err == errFileNotFound || err == errVolumeNotFound {
-			var vols []VolInfo
-			vols, err = disk.ListVols()
-			if err != nil {
-				return nil, err
-			}
-			if len(vols) > 1 {
-				// 'format.json' not found, but we found user data.
-				return nil, errCorruptedFormat
-			}
-			// No other data found, its a fresh disk.
-			return nil, errUnformattedDisk
-		}
-		return nil, err
-	}
-
-	// Try to decode format json into formatConfigV1 struct.
-	format = &formatConfigV1{}
-	if err = json.Unmarshal(buf, format); err != nil {
-		return nil, err
-	}
-
-	// Success.
-	return format, nil
-}
-
-// collectNSaveNewFormatConfigs - creates new format configs based on
-// the reference config and saves it on all disks, this is to be
-// called from healFormatXL* functions.
-func collectNSaveNewFormatConfigs(referenceConfig *formatConfigV1,
-	orderedDisks []StorageAPI) error {
-
-	// Collect new format configs that need to be written.
-	var newFormatConfigs = make([]*formatConfigV1, len(orderedDisks))
-	for index := range orderedDisks {
-		// New configs are generated since we are going
-		// to re-populate across all disks.
-		config := &formatConfigV1{
-			Version: referenceConfig.Version,
-			Format:  referenceConfig.Format,
-			XL: &xlFormat{
-				Version: referenceConfig.XL.Version,
-				Disk:    referenceConfig.XL.JBOD[index],
-				JBOD:    referenceConfig.XL.JBOD,
-			},
-		}
-		newFormatConfigs[index] = config
-	}
-
-	// Initialize meta volume, if volume already exists ignores it.
-	if err := initMetaVolume(orderedDisks); err != nil {
-		return fmt.Errorf("Unable to initialize '.minio.sys' meta volume, %s", err)
-	}
-
-	// Save new `format.json` across all disks, in JBOD order.
-	return saveFormatXL(orderedDisks, newFormatConfigs)
-}
-
-// Heals any missing format.json on the drives. Returns error only for
-// unexpected errors as regular errors can be ignored since there
-// might be enough quorum to be operational.  Heals only fresh disks.
-func healFormatXLFreshDisks(storageDisks []StorageAPI,
-	formatConfigs []*formatConfigV1) error {
-
-	// Reorder the disks based on the JBOD order.
-	referenceConfig, orderedDisks, err := reorderDisks(storageDisks,
-		formatConfigs, true)
-	if err != nil {
-		return err
-	}
-
-	// Fill in the missing disk back from format configs.
-	// We need to make sure we have kept the previous order
-	// and allowed fresh disks to be arranged anywhere.
-	// Following block facilitates to put fresh disks.
-	for index, format := range formatConfigs {
-		// Format is missing so we go through ordered disks.
-		if format == nil {
-			// At this point when disk is missing the fresh disk
-			// in the stack get it back from storageDisks.
-			for oIndex, disk := range orderedDisks {
-				if disk == nil {
-					orderedDisks[oIndex] = storageDisks[index]
-					break
-				}
-			}
-		}
-	}
-
-	// apply new format config and save to all disks
-	return collectNSaveNewFormatConfigs(referenceConfig, orderedDisks)
-}
-
-// collectUnAssignedDisks - collect disks unassigned to orderedDisks
-// from storageDisks and return them.
-func collectUnAssignedDisks(storageDisks, orderedDisks []StorageAPI) (
-	uDisks []StorageAPI) {
-
-	// search for each disk from storageDisks in orderedDisks
-	for i := range storageDisks {
-		found := false
-		for j := range orderedDisks {
-			if storageDisks[i] == orderedDisks[j] {
-				found = true
-				break
-			}
-		}
-		if !found {
-			// append not found disk to result
-			uDisks = append(uDisks, storageDisks[i])
-		}
-	}
-	return uDisks
-}
-
-// Inspect the content of all disks to guess the right order according
-// to the format files. The right order is represented in orderedDisks
-func reorderDisksByInspection(orderedDisks, storageDisks []StorageAPI,
-	formatConfigs []*formatConfigV1) ([]StorageAPI, error) {
-
-	for index, format := range formatConfigs {
-		if format != nil {
-			continue
-		}
-		vols, err := storageDisks[index].ListVols()
-		if err != nil {
-			return nil, err
-		}
-		if len(vols) == 0 {
-			continue
-		}
-		volName := ""
-		// Avoid picking minioMetaBucket because ListVols()
-		// returns a non ordered list
-		for i := range vols {
-			if vols[i].Name != minioMetaBucket {
-				volName = vols[i].Name
-				break
-			}
-		}
-		if volName == "" {
-			continue
-		}
-		objects, err := storageDisks[index].ListDir(volName, "")
-		if err != nil {
-			return nil, err
-		}
-		if len(objects) == 0 {
-			continue
-		}
-		xlData, err := readXLMeta(storageDisks[index], volName, objects[0])
-		if err != nil {
-			if err == errFileNotFound {
-				continue
-			}
-			return nil, err
-		}
-		diskIndex := -1
-		for i, d := range xlData.Erasure.Distribution {
-			if d == xlData.Erasure.Index {
-				diskIndex = i
-			}
-		}
-		// Check for found results
-		if diskIndex == -1 || orderedDisks[diskIndex] != nil {
-			// Some inconsistent data are found, exit immediately.
-			return nil, errCorruptedFormat
-		}
-		orderedDisks[diskIndex] = storageDisks[index]
-	}
-	return orderedDisks, nil
-}
-
-// Heals corrupted format json in all disks
-func healFormatXLCorruptedDisks(storageDisks []StorageAPI,
-	formatConfigs []*formatConfigV1) error {
-
-	// Reorder the disks based on the JBOD order.
-	referenceConfig, orderedDisks, err := reorderDisks(storageDisks,
-		formatConfigs, true)
-	if err != nil {
-		return err
-	}
-
-	// For disks with corrupted formats, inspect the disks
-	// contents to guess the disks order
-	orderedDisks, err = reorderDisksByInspection(orderedDisks, storageDisks,
-		formatConfigs)
-	if err != nil {
-		return err
-	}
-
-	// At this stage, all disks with corrupted formats but with
-	// objects inside found their way.  Now take care of
-	// unformatted disks, which are the `unAssignedDisks`
-	unAssignedDisks := collectUnAssignedDisks(storageDisks, orderedDisks)
-
-	// Assign unassigned disks to nil elements in orderedDisks
-	for i, disk := range orderedDisks {
-		if disk == nil && len(unAssignedDisks) > 0 {
-			orderedDisks[i] = unAssignedDisks[0]
-			unAssignedDisks = unAssignedDisks[1:]
-		}
-	}
-
-	// apply new format config and save to all disks
-	return collectNSaveNewFormatConfigs(referenceConfig, orderedDisks)
-}
-
-// loadFormatXL - loads XL `format.json` and returns back properly
-// ordered storage slice based on `format.json`.
-func loadFormatXL(bootstrapDisks []StorageAPI, readQuorum int) (disks []StorageAPI, err error) {
-	var unformattedDisksFoundCnt = 0
-	var diskNotFoundCount = 0
-	var corruptedDisksFoundCnt = 0
-	formatConfigs := make([]*formatConfigV1, len(bootstrapDisks))
-
-	// Try to load `format.json` bootstrap disks.
-	for index, disk := range bootstrapDisks {
-		if disk == nil {
-			diskNotFoundCount++
-			continue
-		}
-		var formatXL *formatConfigV1
-		formatXL, err = loadFormat(disk)
-		if err != nil {
-			if err == errUnformattedDisk {
-				unformattedDisksFoundCnt++
-				continue
-			} else if err == errDiskNotFound {
-				diskNotFoundCount++
-				continue
-			} else if err == errCorruptedFormat {
-				corruptedDisksFoundCnt++
-				continue
-			}
-			return nil, err
-		}
-		// Save valid formats.
-		formatConfigs[index] = formatXL
-	}
-
-	// If all disks indicate that 'format.json' is not available return 'errUnformattedDisk'.
-	if unformattedDisksFoundCnt > len(bootstrapDisks)-readQuorum {
-		return nil, errUnformattedDisk
-	} else if corruptedDisksFoundCnt > len(bootstrapDisks)-readQuorum {
-		return nil, errCorruptedFormat
-	} else if diskNotFoundCount == len(bootstrapDisks) {
-		return nil, errDiskNotFound
-	} else if diskNotFoundCount > len(bootstrapDisks)-readQuorum {
-		return nil, errXLReadQuorum
-	}
-
-	// Validate the format configs read are correct.
-	if err = checkFormatXL(formatConfigs); err != nil {
-		return nil, err
-	}
-	// Erasure code requires disks to be presented in the same
-	// order each time.
-	_, orderedDisks, err := reorderDisks(bootstrapDisks, formatConfigs,
-		false)
-	return orderedDisks, err
-}
-
-func checkFormatXLValue(formatXL *formatConfigV1) error {
-	// Validate format version and format type.
-	if formatXL.Version != formatFileV1 {
-		return fmt.Errorf("Unsupported version of backend format [%s] found", formatXL.Version)
-	}
-	if formatXL.Format != formatBackendXL {
-		return fmt.Errorf("Unsupported backend format [%s] found", formatXL.Format)
-	}
-	if formatXL.XL.Version != "1" {
-		return fmt.Errorf("Unsupported XL backend format found [%s]", formatXL.XL.Version)
-	}
-	return nil
-}
-
-func checkFormatXLValues(formatConfigs []*formatConfigV1) (int, error) {
-	for i, formatXL := range formatConfigs {
-		if formatXL == nil {
-			continue
-		}
-		if err := checkFormatXLValue(formatXL); err != nil {
-			return i, err
-		}
-		if len(formatConfigs) != len(formatXL.XL.JBOD) {
-			return i, fmt.Errorf("Number of disks %d did not match the backend format %d",
-				len(formatConfigs), len(formatXL.XL.JBOD))
-		}
-	}
-	return -1, nil
-}
-
-// checkFormatXL - verifies if format.json format is intact.
-func checkFormatXL(formatConfigs []*formatConfigV1) error {
-	if _, err := checkFormatXLValues(formatConfigs); err != nil {
-		return err
-	}
-	if err := checkJBODConsistency(formatConfigs); err != nil {
-		return err
-	}
-	return checkDisksConsistency(formatConfigs)
-}
-
-// saveFormatXL - populates `format.json` on disks in its order.
-func saveFormatXL(storageDisks []StorageAPI, formats []*formatConfigV1) error {
-	var errs = make([]error, len(storageDisks))
-	var wg = &sync.WaitGroup{}
-	// Write `format.json` to all disks.
-	for index, disk := range storageDisks {
-		if disk == nil {
-			continue
-		}
-		wg.Add(1)
-		go func(index int, disk StorageAPI, format *formatConfigV1) {
-			defer wg.Done()
-
-			// Marshal and write to disk.
-			formatBytes, err := json.Marshal(format)
-			if err != nil {
-				errs[index] = err
-				return
-			}
-
-			// Purge any existing temporary file, okay to ignore errors here.
-			disk.DeleteFile(minioMetaBucket, formatConfigFileTmp)
-
-			// Append file `format.json.tmp`.
-			if err = disk.AppendFile(minioMetaBucket, formatConfigFileTmp, formatBytes); err != nil {
-				errs[index] = err
-				return
-			}
-			// Rename file `format.json.tmp` --> `format.json`.
-			if err = disk.RenameFile(minioMetaBucket, formatConfigFileTmp, minioMetaBucket, formatConfigFile); err != nil {
-				errs[index] = err
-				return
-			}
-		}(index, disk, formats[index])
-	}
-
-	// Wait for the routines to finish.
-	wg.Wait()
-
-	// Validate if we encountered any errors, return quickly.
-	for _, err := range errs {
-		if err != nil {
-			// Failure.
-			return err
-		}
-	}
-
-	// Success.
-	return nil
-}
-
-// initFormatXL - save XL format configuration on all disks.
-func initFormatXL(storageDisks []StorageAPI) (err error) {
-	// Initialize jbods.
-	var jbod = make([]string, len(storageDisks))
-
-	// Initialize formats.
-	var formats = make([]*formatConfigV1, len(storageDisks))
-
-	// Initialize `format.json`.
-	for index, disk := range storageDisks {
-		if disk == nil {
-			continue
-		}
-		// Allocate format config.
-		formats[index] = &formatConfigV1{
-			Version: formatFileV1,
-			Format:  formatBackendXL,
-			XL: &xlFormat{
-				Version: xlFormatBackendV1,
-				Disk:    mustGetUUID(),
-			},
-		}
-		jbod[index] = formats[index].XL.Disk
-	}
-
-	// Update the jbod entries.
-	for index, disk := range storageDisks {
-		if disk == nil {
-			continue
-		}
-		// Save jbod.
-		formats[index].XL.JBOD = jbod
-	}
-
-	// Initialize meta volume, if volume already exists ignores it.
-	if err := initMetaVolume(storageDisks); err != nil {
-		return fmt.Errorf("Unable to initialize '.minio.sys' meta volume, %s", err)
-	}
-
-	// Save formats `format.json` across all disks.
-	return saveFormatXL(storageDisks, formats)
-}

cmd/format-fs.go

@@ -0,0 +1,259 @@
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path"
+	"time"
+
+	errors2 "github.com/minio/minio/pkg/errors"
+	"github.com/minio/minio/pkg/lock"
+)
+
+// FS format version strings.
+const (
+	formatBackendFS   = "fs"
+	formatFSVersionV1 = "1"
+	formatFSVersionV2 = "2"
+)
+
+// formatFSV1 - structure holds format version '1'.
+type formatFSV1 struct {
+	formatMetaV1
+	FS struct {
+		Version string `json:"version"`
+	} `json:"fs"`
+}
+
+// formatFSV2 - structure is same as formatFSV1. But the multipart backend
+// structure is flat instead of hierarchy now.
+// In .minio.sys/multipart we have:
+// sha256(bucket/object)/uploadID/[fs.json, 1.etag, 2.etag ....]
+type formatFSV2 = formatFSV1
+
+// Used to detect the version of "fs" format.
+type formatFSVersionDetect struct {
+	FS struct {
+		Version string `json:"version"`
+	} `json:"fs"`
+}
+
+// Returns the latest "fs" format V1
+func newFormatFSV1() (format *formatFSV1) {
+	f := &formatFSV1{}
+	f.Version = formatMetaVersionV1
+	f.Format = formatBackendFS
+	f.FS.Version = formatFSVersionV1
+	return f
+}
+
+// Returns the latest "fs" format V2
+func newFormatFSV2() (format *formatFSV2) {
+	f := &formatFSV2{}
+	f.Version = formatMetaVersionV1
+	f.Format = formatBackendFS
+	f.FS.Version = formatFSVersionV2
+	return f
+}
+
+// Returns the field formatMetaV1.Format i.e the string "fs" which is never likely to change.
+// We do not use this function in XL to get the format as the file is not fcntl-locked on XL.
+func formatMetaGetFormatBackendFS(r io.ReadSeeker) (string, error) {
+	format := &formatMetaV1{}
+	if err := jsonLoad(r, format); err != nil {
+		return "", err
+	}
+	if format.Version == formatMetaVersionV1 {
+		return format.Format, nil
+	}
+	return "", fmt.Errorf(`format.Version expected: %s, got: %s`, formatMetaVersionV1, format.Version)
+}
+
+// Returns formatFS.FS.Version
+func formatFSGetVersion(r io.ReadSeeker) (string, error) {
+	format := &formatFSVersionDetect{}
+	if err := jsonLoad(r, format); err != nil {
+		return "", err
+	}
+	return format.FS.Version, nil
+}
+
+// Migrate from V1 to V2. V2 implements new backend format for multipart
+// uploads. Delete the previous multipart directory.
+func formatFSMigrateV1ToV2(wlk *lock.LockedFile, fsPath string) error {
+	version, err := formatFSGetVersion(wlk)
+	if err != nil {
+		return err
+	}
+
+	if version != formatFSVersionV1 {
+		return fmt.Errorf(`format.json version expected %s, found %s`, formatFSVersionV1, version)
+	}
+
+	if err = fsRemoveAll(path.Join(fsPath, minioMetaMultipartBucket)); err != nil {
+		return err
+	}
+
+	if err = os.MkdirAll(path.Join(fsPath, minioMetaMultipartBucket), 0755); err != nil {
+		return err
+	}
+
+	return jsonSave(wlk.File, newFormatFSV2())
+}
+
+// Migrate the "fs" backend.
+// Migration should happen when formatFSV1.FS.Version changes. This version
+// can change when there is a change to the struct formatFSV1.FS or if there
+// is any change in the backend file system tree structure.
+func formatFSMigrate(wlk *lock.LockedFile, fsPath string) error {
+	// Add any migration code here in case we bump format.FS.Version
+	version, err := formatFSGetVersion(wlk)
+	if err != nil {
+		return err
+	}
+
+	switch version {
+	case formatFSVersionV1:
+		if err = formatFSMigrateV1ToV2(wlk, fsPath); err != nil {
+			return err
+		}
+		fallthrough
+	case formatFSVersionV2:
+		// We are at the latest version.
+	}
+
+	// Make sure that the version is what we expect after the migration.
+	version, err = formatFSGetVersion(wlk)
+	if err != nil {
+		return err
+	}
+	if version != formatFSVersionV2 {
+		return fmt.Errorf(`%s file: expected FS version: %s, found FS version: %s`, formatConfigFile, formatFSVersionV2, version)
+	}
+	return nil
+}
+
+// Creates a new format.json if unformatted.
+func createFormatFS(fsFormatPath string) error {
+	// Attempt a write lock on formatConfigFile `format.json`
+	// file stored in minioMetaBucket(.minio.sys) directory.
+	lk, err := lock.TryLockedOpenFile(fsFormatPath, os.O_RDWR|os.O_CREATE, 0600)
+	if err != nil {
+		return errors2.Trace(err)
+	}
+	// Close the locked file upon return.
+	defer lk.Close()
+
+	fi, err := lk.Stat()
+	if err != nil {
+		return errors2.Trace(err)
+	}
+	if fi.Size() != 0 {
+		// format.json already got created because of another minio process's createFormatFS()
+		return nil
+	}
+
+	return jsonSave(lk.File, newFormatFSV1())
+}
+
+// This function returns a read-locked format.json reference to the caller.
+// The file descriptor should be kept open throughout the life
+// of the process so that another minio process does not try to
+// migrate the backend when we are actively working on the backend.
+func initFormatFS(fsPath string) (rlk *lock.RLockedFile, err error) {
+	fsFormatPath := pathJoin(fsPath, minioMetaBucket, formatConfigFile)
+	// Any read on format.json should be done with read-lock.
+	// Any write on format.json should be done with write-lock.
+	for {
+		isEmpty := false
+		rlk, err := lock.RLockedOpenFile(fsFormatPath)
+		if err == nil {
+			// format.json can be empty in a rare condition when another
+			// minio process just created the file but could not hold lock
+			// and write to it.
+			var fi os.FileInfo
+			fi, err = rlk.Stat()
+			if err != nil {
+				return nil, errors2.Trace(err)
+			}
+			isEmpty = fi.Size() == 0
+		}
+		if os.IsNotExist(err) || isEmpty {
+			if err == nil {
+				rlk.Close()
+			}
+			// Fresh disk - create format.json
+			err = createFormatFS(fsFormatPath)
+			if err == lock.ErrAlreadyLocked {
+				// Lock already present, sleep and attempt again.
+				// Can happen in a rare situation when a parallel minio process
+				// holds the lock and creates format.json
+				time.Sleep(100 * time.Millisecond)
+				continue
+			}
+			if err != nil {
+				return nil, errors2.Trace(err)
+			}
+			// After successfully creating format.json try to hold a read-lock on
+			// the file.
+			continue
+		}
+		if err != nil {
+			return nil, errors2.Trace(err)
+		}
+
+		formatBackend, err := formatMetaGetFormatBackendFS(rlk)
+		if err != nil {
+			return nil, errors2.Trace(err)
+		}
+		if formatBackend != formatBackendFS {
+			return nil, fmt.Errorf(`%s file: expected format-type: %s, found: %s`, formatConfigFile, formatBackendFS, formatBackend)
+		}
+		version, err := formatFSGetVersion(rlk)
+		if err != nil {
+			return nil, err
+		}
+		if version != formatFSVersionV2 {
+			// Format needs migration
+			rlk.Close()
+			// Hold write lock during migration so that we do not disturb any
+			// minio processes running in parallel.
+			wlk, err := lock.TryLockedOpenFile(fsFormatPath, os.O_RDWR, 0)
+			if err == lock.ErrAlreadyLocked {
+				// Lock already present, sleep and attempt again.
+				time.Sleep(100 * time.Millisecond)
+				continue
+			}
+			if err != nil {
+				return nil, err
+			}
+			err = formatFSMigrate(wlk, fsPath)
+			wlk.Close()
+			if err != nil {
+				// Migration failed, bail out so that the user can observe what happened.
+				return nil, err
+			}
+			// Successfully migrated, now try to hold a read-lock on format.json
+			continue
+		}
+
+		return rlk, nil
+	}
+}

cmd/format-fs_test.go

@@ -0,0 +1,102 @@
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package cmd
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// TestFSFormatFS - tests initFormatFS, formatMetaGetFormatBackendFS, formatFSGetVersion.
+func TestFSFormatFS(t *testing.T) {
+	// Prepare for testing
+	disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
+	defer os.RemoveAll(disk)
+
+	fsFormatPath := pathJoin(disk, minioMetaBucket, formatConfigFile)
+
+	// Assign a new UUID.
+	uuid := mustGetUUID()
+
+	// Initialize meta volume, if volume already exists ignores it.
+	if err := initMetaVolumeFS(disk, uuid); err != nil {
+		t.Fatal(err)
+	}
+
+	rlk, err := initFormatFS(disk)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rlk.Close()
+
+	// Do the basic sanity checks to check if initFormatFS() did its job.
+	f, err := os.OpenFile(fsFormatPath, os.O_RDWR, 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	format, err := formatMetaGetFormatBackendFS(f)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if format != formatBackendFS {
+		t.Fatalf(`expected: %s, got: %s`, formatBackendFS, format)
+	}
+	version, err := formatFSGetVersion(f)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if version != formatFSVersionV2 {
+		t.Fatalf(`expected: %s, got: %s`, formatFSVersionV2, version)
+	}
+
+	// Corrupt the format.json file and test the functions.
+	// formatMetaGetFormatBackendFS, formatFSGetVersion, initFormatFS should return errors.
+	if err = f.Truncate(0); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = f.WriteString("b"); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err = formatMetaGetFormatBackendFS(f); err == nil {
+		t.Fatal("expected to fail")
+	}
+	if _, err = formatFSGetVersion(rlk); err == nil {
+		t.Fatal("expected to fail")
+	}
+	if _, err = initFormatFS(disk); err == nil {
+		t.Fatal("expected to fail")
+	}
+
+	// With unknown formatMetaV1.Version formatMetaGetFormatBackendFS, initFormatFS should return error.
+	if err = f.Truncate(0); err != nil {
+		t.Fatal(err)
+	}
+	// Here we set formatMetaV1.Version to "2"
+	if _, err = f.WriteString(`{"version":"2","format":"fs","fs":{"version":"1"}}`); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = formatMetaGetFormatBackendFS(f); err == nil {
+		t.Fatal("expected to fail")
+	}
+	if _, err = initFormatFS(disk); err == nil {
+		t.Fatal("expected to fail")
+	}
+}