Merge master for release.

Add docker release files. (#4473 )
We used to release by building directly on the docker hub auto build process, which is sufficient for edge but it is not a good idea to do it for stable releases. Do not build docker release binaries again, but instead use the released binaries themselves which are signed and validated.
2026-07-31 07:45:19 +03:00 · 2017-06-14 12:04:15 -07:00 · 2017-06-14 02:08:35 -07:00 · 2017-06-13 16:10:11 -07:00 · 2017-06-13 08:29:07 -07:00 · 2017-06-13 01:37:14 -07:00
816 changed files with 165243 additions and 12235 deletions
@@ -26,8 +26,8 @@

 ## Your Environment
 <!--- Include as many relevant details about the environment you experienced the bug in -->
-* Version used:
+* Version used (`minio version`):
 * Environment name and version (e.g. nginx 1.9.1):
 * Server type and version:
-* Operating System and version:
+* Operating System and version (`uname -a`):
 * Link to your project:
@@ -0,0 +1,4 @@
+{
+  "asi": true,
+  "esnext": true   
+}
@@ -18,6 +18,8 @@ env:
 script:
 ## Run all the tests
 - make
+- diff -au <(gofmt -d cmd) <(printf "")
+- diff -au <(gofmt -d pkg) <(printf "")
 - make test GOFLAGS="-timeout 15m -race -v"
 - make coverage

@@ -1,5 +1,7 @@
 FROM alpine:3.5

+MAINTAINER Minio Inc <dev@minio.io>
+
 ENV GOPATH /go
 ENV PATH $PATH:$GOPATH/bin
 ENV CGO_ENABLED 0
@@ -9,11 +11,20 @@ WORKDIR /go/src/github.com/minio/
 RUN  \
     apk add --no-cache ca-certificates && \
     apk add --no-cache --virtual .build-deps git go musl-dev && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
     go get -v -d github.com/minio/minio && \
     cd /go/src/github.com/minio/minio && \
-     go install -v -ldflags "-X github.com/minio/minio/cmd.Version=2017-04-29T00:40:27Z -X github.com/minio/minio/cmd.ReleaseTag=RELEASE.2017-04-29T00-40-27Z -X github.com/minio/minio/cmd.CommitID=eb50175ad911d496bf583a599de89547f0c9be89" && \
+     go install -v -ldflags "$(go run buildscripts/gen-ldflags.go)" && \
     rm -rf /go/pkg /go/src /usr/local/go && apk del .build-deps

 EXPOSE 9000
-ENTRYPOINT ["minio"]
+
+COPY buildscripts/docker-entrypoint.sh /usr/bin/
+
+RUN chmod +x /usr/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
+
 VOLUME ["/export"]
+
+CMD ["minio"]
@@ -1,5 +1,7 @@
 FROM resin/aarch64-alpine:3.5

+MAINTAINER Minio Inc <dev@minio.io>
+
 ENV GOPATH /go
 ENV PATH $PATH:$GOPATH/bin
 ENV CGO_ENABLED 0
@@ -9,11 +11,20 @@ WORKDIR /go/src/github.com/minio/
 RUN  \
     apk add --no-cache ca-certificates && \
     apk add --no-cache --virtual .build-deps git go musl-dev && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \     
     go get -v -d github.com/minio/minio && \
     cd /go/src/github.com/minio/minio && \
-     go install -v -ldflags "-X github.com/minio/minio/cmd.Version=2017-03-16T21:50:32Z -X github.com/minio/minio/cmd.ReleaseTag=RELEASE.2017-03-16T21-50-32Z -X github.com/minio/minio/cmd.CommitID=5311eb22fd681a8cd4a46e2a872d46c2352c64e8" && \
+     go install -v -ldflags "$(go run buildscripts/gen-ldflags.go)" && \
     rm -rf /go/pkg /go/src /usr/local/go && apk del .build-deps

 EXPOSE 9000
-ENTRYPOINT ["minio"]
+
+COPY buildscripts/docker-entrypoint.sh /usr/bin/
+
+RUN chmod +x /usr/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
+
 VOLUME ["/export"]
+
+CMD ["minio"]
@@ -1,5 +1,7 @@
 FROM resin/armhf-alpine:3.5

+MAINTAINER Minio Inc <dev@minio.io>
+
 ENV GOPATH /go
 ENV PATH $PATH:$GOPATH/bin
 ENV CGO_ENABLED 0
@@ -9,11 +11,20 @@ WORKDIR /go/src/github.com/minio/
 RUN  \
     apk add --no-cache ca-certificates && \
     apk add --no-cache --virtual .build-deps git go musl-dev && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
     go get -v -d github.com/minio/minio && \
     cd /go/src/github.com/minio/minio && \
-     go install -v -ldflags "-X github.com/minio/minio/cmd.Version=2017-03-16T21:50:32Z -X github.com/minio/minio/cmd.ReleaseTag=RELEASE.2017-03-16T21-50-32Z -X github.com/minio/minio/cmd.CommitID=5311eb22fd681a8cd4a46e2a872d46c2352c64e8" && \
+     go install -v -ldflags "$(go run buildscripts/gen-ldflags.go)" && \
     rm -rf /go/pkg /go/src /usr/local/go && apk del .build-deps

 EXPOSE 9000
-ENTRYPOINT ["minio"]
+
+COPY buildscripts/docker-entrypoint.sh /usr/bin/
+
+RUN chmod +x /usr/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
+
 VOLUME ["/export"]
+
+CMD ["minio"]
@@ -0,0 +1,23 @@
+FROM alpine:3.5
+
+MAINTAINER Minio Inc <dev@minio.io>
+
+RUN \
+     apk add --no-cache ca-certificates && \
+     apk add --no-cache --virtual .build-deps curl && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
+     curl https://dl.minio.io/server/minio/release/linux-amd64/minio > /usr/bin/minio && \
+     chmod +x /usr/bin/minio && apk del .build-deps
+
+EXPOSE 9000
+
+COPY buildscripts/docker-entrypoint.sh /usr/bin/
+
+RUN chmod +x /usr/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
+
+VOLUME ["/export"]
+
+CMD ["minio"]
+
@@ -0,0 +1,22 @@
+FROM resin/aarch64-alpine:3.5
+
+MAINTAINER Minio Inc <dev@minio.io>
+
+RUN \
+     apk add --no-cache ca-certificates && \
+     apk add --no-cache --virtual .build-deps curl && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
+     curl https://dl.minio.io/server/minio/release/linux-arm64/minio > /usr/bin/minio && \
+     chmod +x /usr/bin/minio && apk del .build-deps
+
+EXPOSE 9000
+
+COPY buildscripts/docker-entrypoint.sh /usr/bin/
+
+RUN chmod +x /usr/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
+
+VOLUME ["/export"]
+
+CMD ["minio"]
@@ -0,0 +1,22 @@
+FROM resin/armhf-alpine:3.5
+
+MAINTAINER Minio Inc <dev@minio.io>
+
+RUN \
+     apk add --no-cache ca-certificates && \
+     apk add --no-cache --virtual .build-deps curl && \
+     echo 'hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4' >> /etc/nsswitch.conf && \
+     curl https://dl.minio.io/server/minio/release/linux-arm/minio > /usr/bin/minio && \
+     chmod +x /usr/bin/minio && apk del .build-deps
+
+EXPOSE 9000
+
+COPY buildscripts/docker-entrypoint.sh /usr/bin/
+
+RUN chmod +x /usr/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]
+
+VOLUME ["/export"]
+
+CMD ["minio"]
@@ -1,7 +1,7 @@
 LDFLAGS := $(shell go run buildscripts/gen-ldflags.go)
 PWD := $(shell pwd)
 GOPATH := $(shell go env GOPATH)
-BUILD_LDFLAGS := '$(LDFLAGS) -s -w'
+BUILD_LDFLAGS := '$(LDFLAGS)'
 TAG := latest

 HOST ?= $(shell uname)
@@ -56,40 +56,41 @@ endif
 all: install

 checks:
-	@echo "Checking deps:"
+	@echo "Check deps"
 	@(env bash $(PWD)/buildscripts/checkdeps.sh)
+	@echo "Checking project is in GOPATH"
 	@(env bash $(PWD)/buildscripts/checkgopath.sh)

 getdeps: checks
-	@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
-	@echo "Installing misspell:" && go get -u github.com/client9/misspell/cmd/misspell
-	@echo "Installing ineffassign:" && go get -u github.com/gordonklaus/ineffassign
+	@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
+	@echo "Installing misspell" && go get -u github.com/client9/misspell/cmd/misspell
+	@echo "Installing ineffassign" && go get -u github.com/gordonklaus/ineffassign

 verifiers: vet fmt lint cyclo spelling

 vet:
-	@echo "Running $@:"
-	@go vet github.com/minio/minio/cmd/...
-	@go vet github.com/minio/minio/pkg/...
+	@echo "Running $@"
+	@go tool vet -atomic -bool -copylocks -nilfunc -printf -shadow -rangeloops -unreachable -unsafeptr -unusedresult cmd
+	@go tool vet -atomic -bool -copylocks -nilfunc -printf -shadow -rangeloops -unreachable -unsafeptr -unusedresult pkg

 fmt:
-	@echo "Running $@:"
-	@gofmt -s -l cmd
-	@gofmt -s -l pkg
+	@echo "Running $@"
+	@gofmt -d cmd
+	@gofmt -d pkg

 lint:
-	@echo "Running $@:"
+	@echo "Running $@"
 	@${GOPATH}/bin/golint -set_exit_status github.com/minio/minio/cmd...
 	@${GOPATH}/bin/golint -set_exit_status github.com/minio/minio/pkg...

 ineffassign:
-	@echo "Running $@:"
+	@echo "Running $@"
 	@${GOPATH}/bin/ineffassign .

 cyclo:
-	@echo "Running $@:"
+	@echo "Running $@"
 	@${GOPATH}/bin/gocyclo -over 100 cmd
 	@${GOPATH}/bin/gocyclo -over 100 pkg

@@ -104,27 +105,30 @@ spelling:
 	@${GOPATH}/bin/misspell -error `find docs/`

 test: build
-	@echo "Running all minio testing:"
+	@echo "Running all minio testing"
 	@go test $(GOFLAGS) .
 	@go test $(GOFLAGS) github.com/minio/minio/cmd...
 	@go test $(GOFLAGS) github.com/minio/minio/pkg...

 coverage: build
-	@echo "Running all coverage for minio:"
+	@echo "Running all coverage for minio"
 	@./buildscripts/go-coverage.sh

 gomake-all: build
-	@echo "Installing minio:"
+	@echo "Installing minio at $(GOPATH)/bin/minio"
 	@go build --ldflags $(BUILD_LDFLAGS) -o $(GOPATH)/bin/minio

 pkg-add:
-	${GOPATH}/bin/govendor add $(PKG)
+	@echo "Adding new package $(PKG)"
+	@${GOPATH}/bin/govendor add $(PKG)

 pkg-update:
-	${GOPATH}/bin/govendor update $(PKG)
+	@echo "Updating new package $(PKG)"
+	@${GOPATH}/bin/govendor update $(PKG)

 pkg-remove:
-	${GOPATH}/bin/govendor remove $(PKG)
+	@echo "Remove new package $(PKG)"
+	@${GOPATH}/bin/govendor remove $(PKG)

 pkg-list:
 	@$(GOPATH)/bin/govendor list
@@ -138,7 +142,7 @@ experimental: verifiers
 	@MINIO_RELEASE=EXPERIMENTAL ./buildscripts/build.sh

 clean:
-	@echo "Cleaning up all the generated files:"
+	@echo "Cleaning up all the generated files"
 	@find . -name '*.test' | xargs rm -fv
 	@rm -rf build
 	@rm -rf release
@@ -26,6 +26,20 @@ Install minio packages using [Homebrew](http://brew.sh/)
 brew install minio/stable/minio
 minio server ~/Photos
 ```
+#### Note
+If you previously installed minio using `brew install minio` then uninstall minio as shown below 
+
+```
+brew uninstall minio 
+```
+
+Then re-install the latest minio using:
+
+```
+brew install minio/stable/minio
+```  
+
+>`brew install minio` and `brew upgrade minio` will no longer install/upgrade the latest minio binaries on macOS. Upstream bugs in golang 1.8 broke Minio brew installer. Use the updated `minio/stable/minio` in your brew paths.

 ### Binary Download
 | Platform| Architecture | URL|
@@ -40,11 +54,11 @@ chmod 755 minio
 ### Binary Download
 | Platform| Architecture | URL|
 | ----------| -------- | ------|
-|GNU/Linux|64-bit Intel|https://dl.minio.io/server/minio/release/linux-amd64/minio|
-||32-bit Intel|https://dl.minio.io/server/minio/release/linux-386/minio|
-||32-bit ARM|https://dl.minio.io/server/minio/release/linux-arm/minio|
-||64-bit ARM|https://dl.minio.io/server/minio/release/linux-arm64/minio|
-||32-bit ARMv6|https://dl.minio.io/server/minio/release/linux-arm6vl/minio|
+|GNU/Linux|64-bit Intel|https://dl.minio.io/server/minio/release/linux-amd64/minio |
+|         |32-bit Intel|https://dl.minio.io/server/minio/release/linux-386/minio |
+|         |32-bit ARM|https://dl.minio.io/server/minio/release/linux-arm/minio |
+|         |64-bit ARM|https://dl.minio.io/server/minio/release/linux-arm64/minio |
+|         |32-bit ARMv6|https://dl.minio.io/server/minio/release/linux-arm6vl/minio |
 ```sh
 chmod +x minio
 ./minio server ~/Photos
@@ -54,32 +68,38 @@ chmod +x minio
 ### Binary Download
 | Platform| Architecture | URL|
 | ----------| -------- | ------|
-|Microsoft Windows|64-bit|https://dl.minio.io/server/minio/release/windows-amd64/minio.exe|
-||32-bit|https://dl.minio.io/server/minio/release/windows-386/minio.exe|
+|Microsoft Windows|64-bit|https://dl.minio.io/server/minio/release/windows-amd64/minio.exe |
+|                 |32-bit|https://dl.minio.io/server/minio/release/windows-386/minio.exe |
 ```sh
 minio.exe server D:\Photos
 ```

 ## FreeBSD
+### Port
+Install minio packages using [pkg](https://github.com/freebsd/pkg)
+
+```sh
+pkg install minio
+sysrc minio_enable=yes
+sysrc minio_disks=/home/user/Photos
+service minio start
+```
+
 ### Binary Download
 | Platform| Architecture | URL|
 | ----------| -------- | ------|
-|FreeBSD|64-bit|https://dl.minio.io/server/minio/release/freebsd-amd64/minio|
+|FreeBSD|64-bit|https://dl.minio.io/server/minio/release/freebsd-amd64/minio |
 ```sh
 chmod 755 minio
 ./minio server ~/Photos
 ```

-You can run Minio on FreeBSD with FreeNAS storage-backend - see [here](https://docs.minio.io/docs/how-to-run-minio-in-freenas) for more details.
-
 ## 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
-
 go get -u github.com/minio/minio
-
 ```

 ## Test using Minio Browser
@@ -36,9 +36,9 @@ test_script:
  # Unit tests
  - ps: Add-AppveyorTest "Unit Tests" -Outcome Running
  - mkdir build\coverage
-  - go test -timeout 17m -race github.com/minio/minio/cmd...
-  - go test -race github.com/minio/minio/pkg...
-  - go test -coverprofile=build\coverage\coverage.txt -covermode=atomic github.com/minio/minio/cmd
+  - go test -v -timeout 17m -race github.com/minio/minio/cmd...
+  - go test -v -race github.com/minio/minio/pkg...
+  - go test -v -coverprofile=build\coverage\coverage.txt -covermode=atomic github.com/minio/minio/cmd
  - ps: Update-AppveyorTest "Unit Tests" -Outcome Passed

 after_test:
@@ -1,8 +1,9 @@
 {
-    "presets": [
-        "es2015",
-        "react"
-    ],
-
-    "plugins": ["transform-object-rest-spread"]
-}
+  "presets": [
+    "es2015",
+    "react"
+  ],
+  "plugins": [
+    "transform-object-rest-spread"
+  ]
+}
@@ -27,7 +27,7 @@ go get github.com/elazarl/go-bindata-assetfs/...
 yarn release
 ```

-This generates ui-assets.go in the current direcotry. Now do `make` in the parent directory to build the minio binary with the newly generated ``ui-assets.go``
+This generates ui-assets.go in the current directory. Now do `make` in the parent directory to build the minio binary with the newly generated ``ui-assets.go``

 ### Run Minio Browser with live reload

@@ -13,6 +13,7 @@
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
+import 'babel-polyfill'

 import './less/main.less'

@@ -44,7 +45,6 @@ import Web from './js/web'
 window.Web = Web

 import storage from 'local-storage-fallback'
-
 const store = applyMiddleware(thunkMiddleware)(createStore)(reducer)
 const Browse = connect(state => state)(_Browse)
 const Login = connect(state => state)(_Login)
@@ -26,6 +26,8 @@ export const SET_BUCKETS = 'SET_BUCKETS'
 export const ADD_BUCKET = 'ADD_BUCKET'
 export const SET_VISIBLE_BUCKETS = 'SET_VISIBLE_BUCKETS'
 export const SET_OBJECTS = 'SET_OBJECTS'
+export const APPEND_OBJECTS = 'APPEND_OBJECTS'
+export const RESET_OBJECTS = 'RESET_OBJECTS'
 export const SET_STORAGE_INFO = 'SET_STORAGE_INFO'
 export const SET_SERVER_INFO = 'SET_SERVER_INFO'
 export const SHOW_MAKEBUCKET_MODAL = 'SHOW_MAKEBUCKET_MODAL'
@@ -240,15 +242,28 @@ export const setVisibleBuckets = visibleBuckets => {
  }
 }

-export const setObjects = (objects, marker, istruncated) => {
+const appendObjects = (objects, marker, istruncated) => {
  return {
-    type: SET_OBJECTS,
+    type: APPEND_OBJECTS,
    objects,
    marker,
    istruncated
  }
 }

+export const setObjects = (objects) => {
+  return {
+    type: SET_OBJECTS,
+    objects,
+  }
+}
+
+export const resetObjects = () => {
+  return {
+    type: RESET_OBJECTS
+  }
+}
+
 export const setCurrentBucket = currentBucket => {
  return {
    type: SET_CURRENT_BUCKET,
@@ -316,7 +331,7 @@ export const listObjects = () => {
          object.name = object.name.replace(`${currentPath}`, '');
          return object
        })
-        dispatch(setObjects(objects, res.nextmarker, res.istruncated))
+        dispatch(appendObjects(objects, res.nextmarker, res.istruncated))
        dispatch(setPrefixWritable(res.writable))
        dispatch(setLoadBucket(''))
        dispatch(setLoadPath(''))
@@ -337,7 +352,7 @@ export const listObjects = () => {
 export const selectPrefix = prefix => {
  return (dispatch, getState) => {
    const {currentBucket, web} = getState()
-    dispatch(setObjects([], "", false))
+    dispatch(resetObjects())
    dispatch(setLoadPath(prefix))
    web.ListObjects({
      bucketName: currentBucket,
@@ -352,7 +367,7 @@ export const selectPrefix = prefix => {
          object.name = object.name.replace(`${prefix}`, '');
          return object
        })
-        dispatch(setObjects(
+        dispatch(appendObjects(
          objects,
          res.nextmarker,
          res.istruncated
@@ -417,6 +432,8 @@ export const setLoginError = () => {

 export const downloadSelected = (url, req, xhr) => {
  return (dispatch) => {
+    var anchor = document.createElement('a')
+    document.body.appendChild(anchor);
    xhr.open('POST', url, true)
    xhr.responseType = 'blob'

@@ -424,10 +441,20 @@ export const downloadSelected = (url, req, xhr) => {
      if (this.status == 200) {
        dispatch(checkedObjectsReset())
        var blob = new Blob([this.response], {
-          type: 'application/zip'
+          type: 'octet/stream'
        })
        var blobUrl = window.URL.createObjectURL(blob);
-        window.location = blobUrl
+        var separator = req.prefix.length > 1 ? '-' : ''
+
+        anchor.href = blobUrl
+        anchor.download = req.bucketName+separator+req.prefix.slice(0, -1)+'.zip';
+
+
+
+
+        anchor.click()
+        window.URL.revokeObjectURL(blobUrl)
+        anchor.remove()
      }
    };
    xhr.send(JSON.stringify(req));
@@ -68,7 +68,7 @@ export default class Browse extends React.Component {
          memory: res.MinioMemory,
          platform: res.MinioPlatform,
          runtime: res.MinioRuntime,
-          envVars: res.MinioEnvVars
+          info: res.MinioGlobalInfo
        })
        dispatch(actions.setServerInfo(serverInfo))
      })
@@ -227,7 +227,12 @@ export default class Browse extends React.Component {

  removeObject() {
    const {web, dispatch, currentPath, currentBucket, deleteConfirmation, checkedObjects} = this.props
-    let objects = checkedObjects.length > 0 ? checkedObjects : [deleteConfirmation.object]
+    let objects = []
+    if (checkedObjects.length > 0) {
+      objects = checkedObjects.map(obj => `${currentPath}${obj}`)
+    } else {
+      objects = [deleteConfirmation.object]
+    }

    web.RemoveObject({
      bucketname: currentBucket,
@@ -458,21 +463,25 @@ export default class Browse extends React.Component {
    }

    if (web.LoggedIn()) {
-      storageUsageDetails = <div className="feh-usage">
-                              <div className="fehu-chart">
-                                <div style={ { width: usedPercent } }></div>
-                              </div>
-                              <ul>
-                                <li>
-                                  Used:
-                                  { humanize.filesize(total - free) }
-                                </li>
-                                <li className="pull-right">
-                                  Free:
-                                  { humanize.filesize(total - used) }
-                                </li>
-                              </ul>
-                            </div>
+      if (!(used === 0 && free === 0)) {
+        storageUsageDetails = <div className="feh-usage">
+          <div className="fehu-chart">
+            <div style={ { width: usedPercent } }></div>
+          </div>
+          <ul>
+            <li>
+              <span>Used: </span>
+              { humanize.filesize(total - free) }
+            </li>
+            <li className="pull-right">
+              <span>Free: </span>
+              { humanize.filesize(total - used) }
+            </li>
+          </ul>
+        </div>
+      }
+
+
    }

    let createButton = ''
@@ -717,11 +726,11 @@ export default class Browse extends React.Component {
                </div>
                <div className="input-group" style={ { display: web.LoggedIn() ? 'block' : 'none' } }>
                  <label>
-                    Expires in
+                    Expires in (Max 7 days)
                  </label>
                  <div className="set-expire">
                    <div className="set-expire-item">
-        <i className="set-expire-increase" onClick={ this.handleExpireValue.bind(this, 'expireDays', 1, shareObject.object) }></i>
+                      <i className="set-expire-increase" onClick={ this.handleExpireValue.bind(this, 'expireDays', 1, shareObject.object) } />
                      <div className="set-expire-title">
                        Days
                      </div>
@@ -730,12 +739,14 @@ export default class Browse extends React.Component {
                          type="number"
                          min={ 0 }
                          max={ 7 }
-                          defaultValue={ 5 } />
+                          defaultValue={ 5 }
+                          readOnly="readOnly"
+                        />
                      </div>
-        <i className="set-expire-decrease" onClick={ this.handleExpireValue.bind(this, 'expireDays', -1, shareObject.object) }></i>
+                      <i className="set-expire-decrease" onClick={ this.handleExpireValue.bind(this, 'expireDays', -1, shareObject.object) } />
                    </div>
                    <div className="set-expire-item">
-        <i className="set-expire-increase" onClick={ this.handleExpireValue.bind(this, 'expireHours', 1, shareObject.object) }></i>
+                      <i className="set-expire-increase" onClick={ this.handleExpireValue.bind(this, 'expireHours', 1, shareObject.object) } />
                      <div className="set-expire-title">
                        Hours
                      </div>
@@ -744,12 +755,14 @@ export default class Browse extends React.Component {
                          type="number"
                          min={ 0 }
                          max={ 23 }
-                          defaultValue={ 0 } />
+                          defaultValue={ 0 }
+                          readOnly="readOnly"
+                        />
                      </div>
-        <i className="set-expire-decrease" onClick={ this.handleExpireValue.bind(this, 'expireHours', -1, shareObject.object) }></i>
+                      <i className="set-expire-decrease" onClick={ this.handleExpireValue.bind(this, 'expireHours', -1, shareObject.object) } />
                    </div>
                    <div className="set-expire-item">
-        <i className="set-expire-increase" onClick={ this.handleExpireValue.bind(this, 'expireMins', 1, shareObject.object) }></i>
+                      <i className="set-expire-increase" onClick={ this.handleExpireValue.bind(this, 'expireMins', 1, shareObject.object) } />
                      <div className="set-expire-title">
                        Minutes
                      </div>
@@ -758,11 +771,13 @@ export default class Browse extends React.Component {
                          type="number"
                          min={ 0 }
                          max={ 59 }
-                          defaultValue={ 0 } />
+                          defaultValue={ 0 }
+                          readOnly="readOnly"
+                        />
                      </div>
-        <i className="set-expire-decrease" onClick={ this.handleExpireValue.bind(this, 'expireMins', -1, shareObject.object) }></i>
+                      <i className="set-expire-decrease" onClick={ this.handleExpireValue.bind(this, 'expireMins', -1, shareObject.object) } />
                    </div>
-        </div>
+                  </div>
                </div>
              </ModalBody>
              <div className="modal-footer">
@@ -89,10 +89,6 @@ export default class Login extends React.Component {
        { alertBox }
        <div className="l-wrap">
          <form onSubmit={ this.handleSubmit.bind(this) }>
-            <input name="fixBrowser"
-              autoComplete="username"
-              type="text"
-              style={ { display: 'none' } } />
            <InputGroup className="ig-dark"
              label="Access Key"
              id="accessKey"
@@ -102,7 +98,6 @@ export default class Login extends React.Component {
              required="required"
              autoComplete="username">
            </InputGroup>
-            <input type="text" autoComplete="new-password" style={ { display: 'none' } } />
            <InputGroup className="ig-dark"
              label="Secret Key"
              id="secretKey"
@@ -7,6 +7,7 @@ import * as actions from '../actions'
 class PolicyInput extends Component {
  componentDidMount() {
    const {web, dispatch} = this.props
+    this.prefix.focus()
    web.ListAllBucketPolicies({
      bucketName: this.props.currentBucket
    }).then(res => {
@@ -27,8 +28,23 @@ class PolicyInput extends Component {

  handlePolicySubmit(e) {
    e.preventDefault()
-    const {web, dispatch} = this.props
+    const {web, dispatch, currentBucket} = this.props

+    let prefix = currentBucket + '/' + this.prefix.value
+    let policy = this.policy.value
+
+    if (!prefix.endsWith('*')) prefix = prefix + '*'
+ 
+    let prefixAlreadyExists = this.props.policies.some(elem => prefix === elem.prefix)
+
+    if (prefixAlreadyExists) {
+      dispatch(actions.showAlert({
+       type: 'danger',
+       message: "Policy for this prefix already exists."
+      }))
+      return
+    }
+    
    web.SetBucketPolicy({
      bucketName: this.props.currentBucket,
      prefix: this.prefix.value,
@@ -36,8 +52,7 @@ class PolicyInput extends Component {
    })
      .then(() => {
        dispatch(actions.setPolicies([{
-          policy: this.policy.value,
-          prefix: this.prefix.value + '*',
+          policy, prefix
        }, ...this.props.policies]))
        this.prefix.value = ''
      })
@@ -34,23 +34,12 @@ class SettingsModal extends React.Component {

    let accessKeyEnv = ''
    let secretKeyEnv = ''
-    // Check environment variables first. They may or may not have been
-    // loaded already; they load in Browse#componentDidMount.
-    if (serverInfo.envVars) {
-      serverInfo.envVars.forEach(envVar => {
-        let keyVal = envVar.split('=')
-        if (keyVal[0] == 'MINIO_ACCESS_KEY') {
-          accessKeyEnv = keyVal[1]
-        } else if (keyVal[0] == 'MINIO_SECRET_KEY') {
-          secretKeyEnv = keyVal[1]
-        }
-      })
-    }
-    if (accessKeyEnv != '' || secretKeyEnv != '') {
+    // Check environment variables first.
+    if (serverInfo.info.isEnvCreds) {
      dispatch(actions.setSettings({
-        accessKey: accessKeyEnv,
-        secretKey: secretKeyEnv,
-        keysReadOnly: true
+          accessKey: 'xxxxxxxxx',
+          secretKey: 'xxxxxxxxx',
+          keysReadOnly: true
      }))
    } else {
      web.GetAuth()
@@ -77,16 +77,18 @@ export default (state = {
    case actions.SET_CURRENT_BUCKET:
      newState.currentBucket = action.currentBucket
      break
+    case actions.APPEND_OBJECTS:
+      newState.objects = [...newState.objects, ...action.objects]
+      newState.marker = action.marker
+      newState.istruncated = action.istruncated
+      break
    case actions.SET_OBJECTS:
-      if (!action.objects.length) {
-        newState.objects = []
-        newState.marker = ""
-        newState.istruncated = action.istruncated
-      } else {
-        newState.objects = [...action.objects]
-        newState.marker = action.marker
-        newState.istruncated = action.istruncated
-      }
+      newState.objects = [...action.objects]
+      break
+    case actions.RESET_OBJECTS:
+      newState.objects = []
+      newState.marker = ""
+      newState.istruncated = false
      break
    case actions.SET_CURRENT_PATH:
      newState.currentPath = action.currentPath
@@ -81,7 +81,7 @@ select.form-control {
    width: 100%;
    height: 40px;
    border: 0;
-    background: transparent;
+    background: transparent !important;
    text-align: center;
    position: relative;
    z-index: 1;
@@ -114,8 +114,8 @@ select.form-control {

 .ig-dark {
    .ig-text {
-        color: @white;
-        border-color: rgba(255,255,255,0.1);
+        color: @white !important;
+        border-color: rgba(255,255,255,0.1) !important;
    }

    .ig-helpers {
@@ -183,6 +183,17 @@ select.form-control {
 .set-expire {
    border: 1px solid @input-border;
    margin: 35px 0 30px;
+    position: relative;
+
+    &:before {
+        content: '';
+        position: absolute;
+        left: 0;
+        top: 0;
+        width: 100%;
+        height: 100%;
+        z-index: 1;
+    }
 }

 .set-expire-item {
@@ -191,6 +202,7 @@ select.form-control {
    display: table-cell;
    width: 1%;
    text-align: center;
+    .user-select(none);

    &:not(:last-child) {
        border-right: 1px solid @input-border;
@@ -209,6 +221,7 @@ select.form-control {
    left: -8px;

    input {
+        .user-select(none);
        font-size: 20px;
        text-align: center;
        position: relative;
@@ -22,7 +22,6 @@ var purify = require("purifycss-webpack-plugin")
 var exports = {
  context: __dirname,
  entry: [
-    "babel-polyfill",
    path.resolve(__dirname, 'app/index.js')
  ],
  output: {
@@ -101,7 +100,6 @@ var exports = {

 if (process.env.NODE_ENV === 'dev') {
  exports.entry = [
-    "babel-polyfill",
    'webpack/hot/dev-server',
    'webpack-dev-server/client?http://localhost:8080',
    path.resolve(__dirname, 'app/index.js')
@@ -1,10 +1,12 @@
 # THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
 # yarn lockfile v1
+
+
 abbrev@1:
  version "1.0.9"
  resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.0.9.tgz#91b4792588a7738c25f35dd6f63752a2f8776135"

-accepts@~1.3.3, accepts@1.3.3:
+accepts@1.3.3, accepts@~1.3.3:
  version "1.3.3"
  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.3.tgz#c3ca7434938648c3e0d9c1e328dd68b622c284ca"
  dependencies:
@@ -591,6 +593,14 @@ babel-polyfill@^6.22.0:
    core-js "^2.4.0"
    regenerator-runtime "^0.10.0"

+babel-polyfill@^6.23.0:
+  version "6.23.0"
+  resolved "https://registry.yarnpkg.com/babel-polyfill/-/babel-polyfill-6.23.0.tgz#8364ca62df8eafb830499f699177466c3b03499d"
+  dependencies:
+    babel-runtime "^6.22.0"
+    core-js "^2.4.0"
+    regenerator-runtime "^0.10.0"
+
 babel-preset-es2015@^6.14.0:
  version "6.22.0"
  resolved "https://registry.yarnpkg.com/babel-preset-es2015/-/babel-preset-es2015-6.22.0.tgz#af5a98ecb35eb8af764ad8a5a05eb36dc4386835"
@@ -690,14 +700,14 @@ babel-types@^6.19.0, babel-types@^6.22.0:
    lodash "^4.2.0"
    to-fast-properties "^1.0.1"

-babylon@^6.11.0, babylon@^6.15.0, babylon@^6.8.0:
-  version "6.15.0"
-  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.15.0.tgz#ba65cfa1a80e1759b0e89fb562e27dccae70348e"
-
 babylon@6.14.1:
  version "6.14.1"
  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.14.1.tgz#956275fab72753ad9b3435d7afe58f8bf0a29815"

+babylon@^6.11.0, babylon@^6.15.0, babylon@^6.8.0:
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/babylon/-/babylon-6.15.0.tgz#ba65cfa1a80e1759b0e89fb562e27dccae70348e"
+
 backo2@1.0.2:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/backo2/-/backo2-1.0.2.tgz#31ab1ac8b129363463e35b3ebb69f4dfcfba7947"
@@ -722,7 +732,7 @@ base64id@1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/base64id/-/base64id-1.0.0.tgz#47688cb99bb6804f0e06d3e763b1c32e57d8e6b6"

-batch@^0.5.3, batch@0.5.3:
+batch@0.5.3, batch@^0.5.3:
  version "0.5.3"
  resolved "https://registry.yarnpkg.com/batch/-/batch-0.5.3.tgz#3f3414f380321743bfc1042f9a83ff1d5824d464"

@@ -936,7 +946,7 @@ classnames@^2.1.5, classnames@^2.2.3, classnames@^2.2.5:
  version "2.2.5"
  resolved "https://registry.yarnpkg.com/classnames/-/classnames-2.2.5.tgz#fb3801d453467649ef3603c7d61a02bd129bde6d"

-clean-css@^3.2.10, clean-css@3.4.x:
+clean-css@3.4.x, clean-css@^3.2.10:
  version "3.4.24"
  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-3.4.24.tgz#89f5a5e9da37ae02394fe049a41388abbe72c3b5"
  dependencies:
@@ -1015,12 +1025,6 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
  dependencies:
    delayed-stream "~1.0.0"

-commander@^2.2.0, commander@^2.5.0, commander@^2.8.1, commander@^2.9.0, commander@2.9.x:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
-  dependencies:
-    graceful-readlink ">= 1.0.0"
-
 commander@0.6.1:
  version "0.6.1"
  resolved "https://registry.yarnpkg.com/commander/-/commander-0.6.1.tgz#fa68a14f6a945d54dbbe50d8cdb3320e9e3b1a06"
@@ -1035,6 +1039,12 @@ commander@2.8.x:
  dependencies:
    graceful-readlink ">= 1.0.0"

+commander@2.9.x, commander@^2.2.0, commander@^2.5.0, commander@^2.8.1, commander@^2.9.0:
+  version "2.9.0"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.9.0.tgz#9c99094176e12240cb22d6c5146098400fe0f7d4"
+  dependencies:
+    graceful-readlink ">= 1.0.0"
+
 commondir@^1.0.1:
  version "1.0.1"
  resolved "https://registry.yarnpkg.com/commondir/-/commondir-1.0.1.tgz#ddd800da0c66127393cca5950ea968a3aaf1253b"
@@ -1057,14 +1067,14 @@ component-bind@1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/component-bind/-/component-bind-1.0.0.tgz#00c608ab7dcd93897c0009651b1d3a8e1e73bbd1"

-component-emitter@~1.2.0, component-emitter@1.2.1:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
-
 component-emitter@1.1.2:
  version "1.1.2"
  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.1.2.tgz#296594f2753daa63996d2af08d15a95116c9aec3"

+component-emitter@1.2.1, component-emitter@~1.2.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
+
 component-inherit@0.0.3:
  version "0.0.3"
  resolved "https://registry.yarnpkg.com/component-inherit/-/component-inherit-0.0.3.tgz#645fc4adf58b72b649d5cae65135619db26ff143"
@@ -1144,7 +1154,7 @@ cookie-signature@1.0.6:
  version "1.0.6"
  resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"

-cookie@^0.3.1, cookie@0.3.1:
+cookie@0.3.1, cookie@^0.3.1:
  version "0.3.1"
  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"

@@ -1313,17 +1323,13 @@ date-now@^0.1.4:
  version "0.1.4"
  resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"

-debug@^0.7.4:
-  version "0.7.4"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-0.7.4.tgz#06e1ea8082c2cb14e39806e22e2f6f757f92af39"
-
-debug@^2.1.1, debug@^2.1.3, debug@^2.2.0, debug@2, debug@2.6.0:
+debug@2, debug@2.6.0, debug@^2.1.1, debug@^2.1.3, debug@^2.2.0:
  version "2.6.0"
  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.0.tgz#bc596bcabe7617f11d9fa15361eded5608b8499b"
  dependencies:
    ms "0.7.2"

-debug@~2.2.0, debug@2.2.0:
+debug@2.2.0, debug@~2.2.0:
  version "2.2.0"
  resolved "https://registry.yarnpkg.com/debug/-/debug-2.2.0.tgz#f87057e995b1a1f6ae6a4960664137bc56f039da"
  dependencies:
@@ -1335,6 +1341,10 @@ debug@2.3.3:
  dependencies:
    ms "0.7.2"

+debug@^0.7.4:
+  version "0.7.4"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-0.7.4.tgz#06e1ea8082c2cb14e39806e22e2f6f757f92af39"
+
 decamelize@^1.0.0, decamelize@^1.1.1, decamelize@^1.1.2:
  version "1.2.0"
  resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
@@ -1391,7 +1401,7 @@ di@^0.0.1:
  version "0.0.1"
  resolved "https://registry.yarnpkg.com/di/-/di-0.0.1.tgz#806649326ceaa7caa3306d75d985ea2748ba913c"

-diff@^1.3.2, diff@1.4.0:
+diff@1.4.0, diff@^1.3.2:
  version "1.4.0"
  resolved "https://registry.yarnpkg.com/diff/-/diff-1.4.0.tgz#7f28d2eb9ee7b15a97efd89ce63dcfdaa3ccbabf"

@@ -1440,14 +1450,14 @@ domain-browser@^1.1.1:
  version "1.1.7"
  resolved "https://registry.yarnpkg.com/domain-browser/-/domain-browser-1.1.7.tgz#867aa4b093faa05f1de08c06f4d7b21fdf8698bc"

-domelementtype@~1.1.1:
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.1.3.tgz#bd28773e2642881aec51544924299c5cd822185b"
-
 domelementtype@1:
  version "1.3.0"
  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.3.0.tgz#b17aed82e8ab59e52dd9c19b1756e0fc187204c2"

+domelementtype@~1.1.1:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/domelementtype/-/domelementtype-1.1.3.tgz#bd28773e2642881aec51544924299c5cd822185b"
+
 domhandler@2.1:
  version "2.1.0"
  resolved "https://registry.yarnpkg.com/domhandler/-/domhandler-2.1.0.tgz#d2646f5e57f6c3bab11cf6cb05d3c0acf7412594"
@@ -1587,7 +1597,7 @@ escape-html@~1.0.3:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"

-escape-string-regexp@^1.0.2, escape-string-regexp@1.0.2:
+escape-string-regexp@1.0.2, escape-string-regexp@^1.0.2:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.2.tgz#4dbc2fe674e71949caf3fb2695ce7f2dc1d9a8d1"

@@ -1754,7 +1764,7 @@ express@^4.13.3:
    utils-merge "1.0.0"
    vary "~1.1.0"

-extend@^3.0.0, extend@~3.0.0, extend@3.0.0:
+extend@3.0.0, extend@^3.0.0, extend@~3.0.0:
  version "3.0.0"
  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.0.tgz#5a474353b9f3353ddd8176dfd37b91c83a46f1d4"

@@ -1859,14 +1869,6 @@ forever-agent@~0.6.1:
  version "0.6.1"
  resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"

-form-data@~2.1.1:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.1.2.tgz#89c3534008b97eada4cbb157d58f6f5df025eae4"
-  dependencies:
-    asynckit "^0.4.0"
-    combined-stream "^1.0.5"
-    mime-types "^2.1.12"
-
 form-data@1.0.0-rc3:
  version "1.0.0-rc3"
  resolved "https://registry.yarnpkg.com/form-data/-/form-data-1.0.0-rc3.tgz#d35bc62e7fbc2937ae78f948aaa0d38d90607577"
@@ -1875,6 +1877,14 @@ form-data@1.0.0-rc3:
    combined-stream "^1.0.5"
    mime-types "^2.1.3"

+form-data@~2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.1.2.tgz#89c3534008b97eada4cbb157d58f6f5df025eae4"
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "^1.0.5"
+    mime-types "^2.1.12"
+
 formidable@~1.0.14:
  version "1.0.17"
  resolved "https://registry.yarnpkg.com/formidable/-/formidable-1.0.17.tgz#ef5491490f9433b705faa77249c99029ae348559"
@@ -1978,6 +1988,13 @@ glob-parent@^2.0.0:
  dependencies:
    is-glob "^2.0.0"

+glob@3.2.11:
+  version "3.2.11"
+  resolved "https://registry.yarnpkg.com/glob/-/glob-3.2.11.tgz#4a973f635b9190f715d10987d5c00fd2815ebe3d"
+  dependencies:
+    inherits "2"
+    minimatch "0.3"
+
 glob@^5.0.15:
  version "5.0.15"
  resolved "https://registry.yarnpkg.com/glob/-/glob-5.0.15.tgz#1bc936b9e02f4a603fcc222ecf7633d30b8b93b1"
@@ -2009,13 +2026,6 @@ glob@^7.0.0, glob@^7.0.5:
    once "^1.3.0"
    path-is-absolute "^1.0.0"

-glob@3.2.11:
-  version "3.2.11"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-3.2.11.tgz#4a973f635b9190f715d10987d5c00fd2815ebe3d"
-  dependencies:
-    inherits "2"
-    minimatch "0.3"
-
 globals@^9.0.0:
  version "9.14.0"
  resolved "https://registry.yarnpkg.com/globals/-/globals-9.14.0.tgz#8859936af0038741263053b39d0e76ca241e4034"
@@ -2194,7 +2204,7 @@ humanize@0.0.9:
  version "0.0.9"
  resolved "https://registry.yarnpkg.com/humanize/-/humanize-0.0.9.tgz#1994ffaecdfe9c441ed2bdac7452b7bb4c9e41a4"

-iconv-lite@^0.4.5, iconv-lite@0.4.15:
+iconv-lite@0.4.15, iconv-lite@^0.4.5:
  version "0.4.15"
  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.4.15.tgz#fe265a218ac6a57cfe854927e9d04c19825eddeb"

@@ -2225,7 +2235,7 @@ inflight@^1.0.4:
    once "^1.3.0"
    wrappy "1"

-inherits@^2.0.1, inherits@~2.0.0, inherits@~2.0.1, inherits@2, inherits@2.0.3:
+inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@~2.0.0, inherits@~2.0.1:
  version "2.0.3"
  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"

@@ -2418,14 +2428,14 @@ is-typedarray@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"

-isarray@^1.0.0, isarray@~1.0.0, isarray@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
-
 isarray@0.0.1:
  version "0.0.1"
  resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"

+isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
+
 isbinaryfile@^3.0.0:
  version "3.0.2"
  resolved "https://registry.yarnpkg.com/isbinaryfile/-/isbinaryfile-3.0.2.tgz#4a3e974ec0cba9004d3fc6cde7209ea69368a621"
@@ -2505,7 +2515,7 @@ json-stringify-safe@~5.0.1:
  version "5.0.1"
  resolved "https://registry.yarnpkg.com/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz#1296a2d58fd45f19a0f6ce01d65701e2c735b6eb"

-json3@^3.3.2, json3@3.3.2:
+json3@3.3.2, json3@^3.3.2:
  version "3.3.2"
  resolved "https://registry.yarnpkg.com/json3/-/json3-3.3.2.tgz#3c0434743df93e2f5c42aee7b19bcb483575f4e1"

@@ -2633,7 +2643,7 @@ less@^2.7.1:
    request "^2.72.0"
    source-map "^0.5.3"

-loader-utils@^0.2.11, loader-utils@^0.2.16, loader-utils@^0.2.5, loader-utils@^0.2.7, loader-utils@~0.2.2, loader-utils@0.2.x:
+loader-utils@0.2.x, loader-utils@^0.2.11, loader-utils@^0.2.16, loader-utils@^0.2.5, loader-utils@^0.2.7, loader-utils@~0.2.2:
  version "0.2.16"
  resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-0.2.16.tgz#f08632066ed8282835dff88dfb52704765adee6d"
  dependencies:
@@ -2726,20 +2736,16 @@ lower-case@^1.1.1:
  version "1.1.3"
  resolved "https://registry.yarnpkg.com/lower-case/-/lower-case-1.1.3.tgz#c92393d976793eee5ba4edb583cf8eae35bd9bfb"

+lru-cache@2, lru-cache@2.2.x:
+  version "2.2.4"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.2.4.tgz#6c658619becf14031d0d0b594b16042ce4dc063d"
+
 lru-cache@^3.2.0:
  version "3.2.0"
  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-3.2.0.tgz#71789b3b7f5399bec8565dda38aa30d2a097efee"
  dependencies:
    pseudomap "^1.0.1"

-lru-cache@2:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.7.3.tgz#6d4524e8b955f95d4f5b58851ce21dd72fb4e952"
-
-lru-cache@2.2.x:
-  version "2.2.4"
-  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.2.4.tgz#6c658619becf14031d0d0b594b16042ce4dc063d"
-
 macaddress@^0.2.8:
  version "0.2.8"
  resolved "https://registry.yarnpkg.com/macaddress/-/macaddress-0.2.8.tgz#5904dc537c39ec6dbefeae902327135fa8511f12"
@@ -2798,7 +2804,7 @@ micromatch@^2.1.5, micromatch@^2.3.11:
    parse-glob "^3.0.4"
    regex-cache "^0.4.2"

-mime-db@^1.25.0, "mime-db@>= 1.24.0 < 2", mime-db@~1.26.0:
+"mime-db@>= 1.24.0 < 2", mime-db@^1.25.0, mime-db@~1.26.0:
  version "1.26.0"
  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.26.0.tgz#eaffcd0e4fc6935cf8134da246e2e6c35305adff"

@@ -2808,19 +2814,13 @@ mime-types@^2.1.12, mime-types@^2.1.13, mime-types@^2.1.3, mime-types@~2.1.11, m
  dependencies:
    mime-db "~1.26.0"

-mime@^1.2.11, mime@^1.3.4, mime@1.3.4:
-  version "1.3.4"
-  resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"
-
 mime@1.2.x:
  version "1.2.11"
  resolved "https://registry.yarnpkg.com/mime/-/mime-1.2.11.tgz#58203eed86e3a5ef17aed2b7d9ebd47f0a60dd10"

-minimatch@^3.0.0, minimatch@^3.0.2, "minimatch@2 || 3":
-  version "3.0.3"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
-  dependencies:
-    brace-expansion "^1.0.0"
+mime@1.3.4, mime@^1.2.11, mime@^1.3.4:
+  version "1.3.4"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"

 minimatch@0.3:
  version "0.3.0"
@@ -2829,24 +2829,30 @@ minimatch@0.3:
    lru-cache "2"
    sigmund "~1.0.0"

+"minimatch@2 || 3", minimatch@^3.0.0, minimatch@^3.0.2:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.3.tgz#2a4e4090b96b2db06a9d7df01055a62a77c9b774"
+  dependencies:
+    brace-expansion "^1.0.0"
+
+minimist@0.0.8, minimist@~0.0.1:
+  version "0.0.8"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+
 minimist@^1.1.1, minimist@^1.2.0:
  version "1.2.0"
  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"

-minimist@~0.0.1, minimist@0.0.8:
-  version "0.0.8"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
+mkdirp@0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.3.0.tgz#1bbf5ab1ba827af23575143490426455f481fe1e"

-mkdirp@^0.5.0, mkdirp@^0.5.1, "mkdirp@>=0.5 0", mkdirp@~0.5.0, mkdirp@~0.5.1, mkdirp@0.5.1:
+mkdirp@0.5.1, "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0, mkdirp@~0.5.1:
  version "0.5.1"
  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
  dependencies:
    minimist "0.0.8"

-mkdirp@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.3.0.tgz#1bbf5ab1ba827af23575143490426455f481fe1e"
-
 mocha@^2.5.3:
  version "2.5.3"
  resolved "https://registry.yarnpkg.com/mocha/-/mocha-2.5.3.tgz#161be5bdeb496771eb9b35745050b622b5aefc58"
@@ -2866,14 +2872,14 @@ moment@^2.15.1:
  version "2.17.1"
  resolved "https://registry.yarnpkg.com/moment/-/moment-2.17.1.tgz#fed9506063f36b10f066c8b59a144d7faebe1d82"

-mout@^0.11.0:
-  version "0.11.1"
-  resolved "https://registry.yarnpkg.com/mout/-/mout-0.11.1.tgz#ba3611df5f0e5b1ffbfd01166b8f02d1f5fa2b99"
-
 "mout@>=0.9 <2.0":
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/mout/-/mout-1.0.0.tgz#9bdf1d4af57d66d47cb353a6335a3281098e1501"

+mout@^0.11.0:
+  version "0.11.1"
+  resolved "https://registry.yarnpkg.com/mout/-/mout-0.11.1.tgz#ba3611df5f0e5b1ffbfd01166b8f02d1f5fa2b99"
+
 ms@0.7.1:
  version "0.7.1"
  resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.1.tgz#9cd13c03adbff25b65effde7ce864ee952017098"
@@ -3028,6 +3034,10 @@ oauth-sign@~0.8.1:
  version "0.8.2"
  resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"

+object-assign@4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"
+
 object-assign@^2.0.0:
  version "2.1.1"
  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-2.1.1.tgz#43c36e5d569ff8e4816c4efa8be02d26967c18aa"
@@ -3036,10 +3046,6 @@ object-assign@^4.0.1, object-assign@^4.1.0:
  version "4.1.1"
  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"

-object-assign@4.1.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"
-
 object-component@0.0.3:
  version "0.0.3"
  resolved "https://registry.yarnpkg.com/object-component/-/object-component-0.0.3.tgz#f0c69aa50efc95b866c186f400a33769cb2f1291"
@@ -3518,14 +3524,14 @@ pseudomap@^1.0.1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"

-punycode@^1.2.4, punycode@^1.4.1:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
-
 punycode@1.3.2:
  version "1.3.2"
  resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.3.2.tgz#9653a036fb7c1ee42342f2325cceefea3926c48d"

+punycode@^1.2.4, punycode@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
+
 purify-css@^1.1.1:
  version "1.1.9"
  resolved "https://registry.yarnpkg.com/purify-css/-/purify-css-1.1.9.tgz#46c9acd8940f3076c0c346c027e286f996168357"
@@ -3548,10 +3554,6 @@ q@^1.1.2:
  version "1.4.1"
  resolved "https://registry.yarnpkg.com/q/-/q-1.4.1.tgz#55705bcd93c5f3673530c2c2cbc0c2b3addc286e"

-qs@~6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-6.3.0.tgz#f403b264f23bc01228c74131b407f18d5ea5d442"
-
 qs@2.3.3:
  version "2.3.3"
  resolved "https://registry.yarnpkg.com/qs/-/qs-2.3.3.tgz#e9e85adbe75da0bbe4c8e0476a086290f863b404"
@@ -3564,6 +3566,10 @@ qs@6.2.1:
  version "6.2.1"
  resolved "https://registry.yarnpkg.com/qs/-/qs-6.2.1.tgz#ce03c5ff0935bc1d9d69a9f14cbd18e568d67625"

+qs@~6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.3.0.tgz#f403b264f23bc01228c74131b407f18d5ea5d442"
+
 query-string@^3.0.0:
  version "3.0.3"
  resolved "https://registry.yarnpkg.com/query-string/-/query-string-3.0.3.tgz#ae2e14b4d05071d4e9b9eb4873c35b0dcd42e638"
@@ -3720,6 +3726,24 @@ react@^0.14.8:
    envify "^3.0.0"
    fbjs "^0.6.1"

+readable-stream@1.0, readable-stream@~1.0.2:
+  version "1.0.34"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "0.0.1"
+    string_decoder "~0.10.x"
+
+readable-stream@1.0.27-1:
+  version "1.0.27-1"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.27-1.tgz#6b67983c20357cefd07f0165001a16d710d91078"
+  dependencies:
+    core-util-is "~1.0.0"
+    inherits "~2.0.1"
+    isarray "0.0.1"
+    string_decoder "~0.10.x"
+
 "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.1.0:
  version "2.2.2"
  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.2.tgz#a9e6fec3c7dda85f8bb1b3ba7028604556fc825e"
@@ -3732,15 +3756,6 @@ react@^0.14.8:
    string_decoder "~0.10.x"
    util-deprecate "~1.0.1"

-readable-stream@~1.0.2, readable-stream@1.0:
-  version "1.0.34"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.34.tgz#125820e34bc842d2f2aaafafe4c2916ee32c157c"
-  dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "0.0.1"
-    string_decoder "~0.10.x"
-
 readable-stream@~2.1.4:
  version "2.1.5"
  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.1.5.tgz#66fa8b720e1438b364681f2ad1a63c618448c9d0"
@@ -3753,15 +3768,6 @@ readable-stream@~2.1.4:
    string_decoder "~0.10.x"
    util-deprecate "~1.0.1"

-readable-stream@1.0.27-1:
-  version "1.0.27-1"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-1.0.27-1.tgz#6b67983c20357cefd07f0165001a16d710d91078"
-  dependencies:
-    core-util-is "~1.0.0"
-    inherits "~2.0.1"
-    isarray "0.0.1"
-    string_decoder "~0.10.x"
-
 readdirp@^2.0.0:
  version "2.1.0"
  resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-2.1.0.tgz#4ed0ad060df3073300c48440373f72d1cc642d78"
@@ -3948,7 +3954,7 @@ right-align@^0.1.1:
  dependencies:
    align-text "^0.1.1"

-rimraf@^2.3.3, rimraf@~2.5.1, rimraf@~2.5.4, rimraf@2:
+rimraf@2, rimraf@^2.3.3, rimraf@~2.5.1, rimraf@~2.5.4:
  version "2.5.4"
  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.5.4.tgz#96800093cbf1a0c86bd95b4625467535c29dfa04"
  dependencies:
@@ -3990,7 +3996,7 @@ rocambole-whitespace@^1.0.0:
    repeat-string "^1.5.0"
    rocambole-token "^1.2.1"

-rocambole@^0.7.0, "rocambole@>=0.7 <2.0":
+"rocambole@>=0.7 <2.0", rocambole@^0.7.0:
  version "0.7.0"
  resolved "https://registry.yarnpkg.com/rocambole/-/rocambole-0.7.0.tgz#f6c79505517dc42b6fb840842b8b953b0f968585"
  dependencies:
@@ -4208,28 +4214,28 @@ source-map-url@~0.3.0:
  version "0.3.0"
  resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.3.0.tgz#7ecaf13b57bcd09da8a40c5d269db33799d4aaf9"

+source-map@0.1.34:
+  version "0.1.34"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.1.34.tgz#a7cfe89aec7b1682c3b198d0acfb47d7d090566b"
+  dependencies:
+    amdefine ">=0.0.4"
+
+source-map@0.4.x, source-map@^0.4.2, source-map@~0.4.1:
+  version "0.4.4"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
+  dependencies:
+    amdefine ">=0.0.4"
+
 source-map@^0.1.38, source-map@^0.1.41:
  version "0.1.43"
  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.1.43.tgz#c24bc146ca517c1471f5dacbe2571b2b7f9e3346"
  dependencies:
    amdefine ">=0.0.4"

-source-map@^0.4.2, source-map@~0.4.1, source-map@0.4.x:
-  version "0.4.4"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.4.4.tgz#eba4f5da9c0dc999de68032d8b4f76173652036b"
-  dependencies:
-    amdefine ">=0.0.4"
-
 source-map@^0.5.0, source-map@^0.5.3, source-map@^0.5.6, source-map@~0.5.0, source-map@~0.5.1, source-map@~0.5.3:
  version "0.5.6"
  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"

-source-map@0.1.34:
-  version "0.1.34"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.1.34.tgz#a7cfe89aec7b1682c3b198d0acfb47d7d090566b"
-  dependencies:
-    amdefine ">=0.0.4"
-
 sprintf-js@~1.0.2:
  version "1.0.3"
  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
@@ -4282,10 +4288,6 @@ strict-uri-encode@^1.0.0:
  version "1.1.0"
  resolved "https://registry.yarnpkg.com/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz#279b225df1d582b1f54e65addd4352e18faa0713"

-string_decoder@^0.10.25, string_decoder@~0.10.x:
-  version "0.10.31"
-  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
-
 string-width@^1.0.1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/string-width/-/string-width-1.0.2.tgz#118bdf5b8cdc51a2a7e70d211e07e2b0b9b107d3"
@@ -4294,6 +4296,10 @@ string-width@^1.0.1:
    is-fullwidth-code-point "^1.0.0"
    strip-ansi "^3.0.0"

+string_decoder@^0.10.25, string_decoder@~0.10.x:
+  version "0.10.31"
+  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-0.10.31.tgz#62e203bc41766c6c28c9fc84301dab1c5310fa94"
+
 stringstream@~0.0.4:
  version "0.0.5"
  resolved "https://registry.yarnpkg.com/stringstream/-/stringstream-0.0.5.tgz#4e484cd4de5a0bbbee18e46307710a8a81621878"
@@ -4338,6 +4344,10 @@ superagent@^1.8.4:
    readable-stream "1.0.27-1"
    reduce-component "1.0.1"

+supports-color@1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-1.2.0.tgz#ff1ed1e61169d06b3cf2d588e188b18d8847e17e"
+
 supports-color@^0.2.0:
  version "0.2.0"
  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-0.2.0.tgz#d92de2694eb3f67323973d7ae3d8b55b4c22190a"
@@ -4356,10 +4366,6 @@ supports-color@^3.1.0, supports-color@^3.1.1, supports-color@^3.2.3:
  dependencies:
    has-flag "^1.0.0"

-supports-color@1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-1.2.0.tgz#ff1ed1e61169d06b3cf2d588e188b18d8847e17e"
-
 svgo@^0.7.0:
  version "0.7.1"
  resolved "https://registry.yarnpkg.com/svgo/-/svgo-0.7.1.tgz#287320fed972cb097e72c2bb1685f96fe08f8034"
@@ -4488,7 +4494,7 @@ ua-parser-js@^0.7.9:
  version "0.7.12"
  resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.12.tgz#04c81a99bdd5dc52263ea29d24c6bf8d4818a4bb"

-uglify-js@~2.7.3, uglify-js@2.7.x:
+uglify-js@2.7.x, uglify-js@~2.7.3:
  version "2.7.5"
  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.7.5.tgz#4612c0c7baaee2ba7c487de4904ae122079f2ca8"
  dependencies:
@@ -4538,7 +4544,7 @@ uniqs@^2.0.0:
  version "2.0.0"
  resolved "https://registry.yarnpkg.com/uniqs/-/uniqs-2.0.0.tgz#ffede4b36b25290696e6e165d4a59edb998e6b02"

-unpipe@~1.0.0, unpipe@1.0.0:
+unpipe@1.0.0, unpipe@~1.0.0:
  version "1.0.0"
  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"

@@ -4557,16 +4563,16 @@ url-loader@^0.5.7:
    loader-utils "0.2.x"
    mime "1.2.x"

-url-parse@^1.1.1:
-  version "1.1.7"
-  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.1.7.tgz#025cff999653a459ab34232147d89514cc87d74a"
+url-parse@1.0.x:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.0.5.tgz#0854860422afdcfefeb6c965c662d4800169927b"
  dependencies:
    querystringify "0.0.x"
    requires-port "1.0.x"

-url-parse@1.0.x:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.0.5.tgz#0854860422afdcfefeb6c965c662d4800169927b"
+url-parse@^1.1.1:
+  version "1.1.7"
+  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.1.7.tgz#025cff999653a459ab34232147d89514cc87d74a"
  dependencies:
    querystringify "0.0.x"
    requires-port "1.0.x"
@@ -4598,7 +4604,7 @@ util-deprecate@~1.0.1:
  version "1.0.2"
  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"

-util@^0.10.3, util@0.10.3:
+util@0.10.3, util@^0.10.3:
  version "0.10.3"
  resolved "https://registry.yarnpkg.com/util/-/util-0.10.3.tgz#7afb1afe50805246489e3db7fe0ed379336ac0f9"
  dependencies:
@@ -4765,22 +4771,22 @@ wide-align@^1.1.0:
  dependencies:
    string-width "^1.0.1"

-window-size@^0.1.4:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/window-size/-/window-size-0.1.4.tgz#f8e1aa1ee5a53ec5bf151ffa09742a6ad7697876"
-
 window-size@0.1.0:
  version "0.1.0"
  resolved "https://registry.yarnpkg.com/window-size/-/window-size-0.1.0.tgz#5438cd2ea93b202efa3a19fe8887aee7c94f9c9d"

-wordwrap@~0.0.2:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
+window-size@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/window-size/-/window-size-0.1.4.tgz#f8e1aa1ee5a53ec5bf151ffa09742a6ad7697876"

 wordwrap@0.0.2:
  version "0.0.2"
  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.2.tgz#b79669bb42ecb409f83d583cad52ca17eaa1643f"

+wordwrap@~0.0.2:
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
+
 wrap-ansi@^2.0.0:
  version "2.1.0"
  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"
@@ -4847,4 +4853,3 @@ yargs@~3.10.0:
 yeast@0.1.2:
  version "0.1.2"
  resolved "https://registry.yarnpkg.com/yeast/-/yeast-0.1.2.tgz#008e06d8094320c372dbc2f8ed76a0ca6c8ac419"
-
@@ -5,7 +5,7 @@ _init() {
    LDFLAGS=$(go run buildscripts/gen-ldflags.go)

    # Extract release tag
-    release_tag=$(echo $LDFLAGS | awk {'print $4'} | cut -f2 -d=)
+    release_tag=$(echo $LDFLAGS | awk {'print $6'} | cut -f2 -d=)

    # Verify release tag.
    if [ -z "$release_tag" ]; then
@@ -28,6 +28,7 @@ _init() {
    ## System binaries
    CP=`which cp`
    SHASUM=`which shasum`
+    SHA256SUM="${SHASUM} -a 256"
    SED=`which sed`
 }

@@ -43,58 +44,36 @@ go_build() {
    release_bin="$release_str/$os-$arch/$(basename $package).$release_tag"
    # Release binary downloadable name
    release_real_bin="$release_str/$os-$arch/$(basename $package)"
-    # Release shasum name
-    release_shasum="$release_str/$os-$arch/$(basename $package).shasum"
+
+    # Release sha1sum name
+    release_shasum="$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.
-    if [ "${arch}" == "arm" ]; then
-        # Release binary downloadable name
-        release_real_bin_6="$release_str/$os-${arch}6vl/$(basename $package)"
+    CGO_ENABLED=0 GOOS=$os GOARCH=$arch go build --ldflags "${LDFLAGS}" -o $release_bin

-        release_bin_6="$release_str/$os-${arch}6vl/$(basename $package).$release_tag"
-        ## Support building for ARM6vl
-        GOARM=6 GOOS=$os GOARCH=$arch go build --ldflags "-s -w ${LDFLAGS}" -o $release_bin_6
-
-        ## Copy
-        $CP -p $release_bin_6 $release_real_bin_6
-
-        # Release shasum name
-        release_shasum_6="$release_str/$os-${arch}6vl/$(basename $package).shasum"
-
-        # Calculate shasum
-        shasum_str=$(${SHASUM} ${release_bin_6})
-        echo ${shasum_str} | $SED "s/$release_str\/$os-${arch}6vl\///g" > $release_shasum_6
-
-        # Release binary downloadable name
-        release_real_bin_7="$release_str/$os-$arch/$(basename $package)"
-
-        release_bin_7="$release_str/$os-$arch/$(basename $package).$release_tag"
-        ## Support building for ARM7vl
-        GOARM=7 GOOS=$os GOARCH=$arch go build --ldflags "-s -w ${LDFLAGS}" -o $release_bin_7
-
-        ## Copy
-        $CP -p $release_bin_7 $release_real_bin_7
-
-        # Release shasum name
-        release_shasum_7="$release_str/$os-$arch/$(basename $package).shasum"
-
-        # Calculate shasum
-        shasum_str=$(${SHASUM} ${release_bin_7})
-        echo ${shasum_str} | $SED "s/$release_str\/$os-$arch\///g" > $release_shasum_7
+    # Create copy
+    if [ $os == "windows" ]; then
+        $CP -p $release_bin ${release_real_bin}.exe
    else
-        GOOS=$os GOARCH=$arch go build --ldflags "-s -w ${LDFLAGS}" -o $release_bin
-
-        # Create copy
-        if [ $os == "windows" ]; then
-            $CP -p $release_bin ${release_real_bin}.exe
-        else
-            $CP -p $release_bin $release_real_bin
-        fi
-
-        # Calculate shasum
-        shasum_str=$(${SHASUM} ${release_bin})
-        echo ${shasum_str} | $SED "s/$release_str\/$os-$arch\///g" > $release_shasum
+        $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() {
@@ -25,6 +25,11 @@ _init() {
    OSX_VERSION="10.8"
    KNAME=$(uname -s)
    ARCH=$(uname -m)
+    case "${KNAME}" in
+        SunOS )
+            ARCH=$(isainfo -k)
+            ;;
+    esac
 }

 ## FIXME:
@@ -97,7 +102,7 @@ assert_is_supported_arch() {

 assert_is_supported_os() {
    case "${KNAME}" in
-        Linux | FreeBSD | OpenBSD | NetBSD | DragonFly )
+        Linux | FreeBSD | OpenBSD | NetBSD | DragonFly | SunOS )
            return
            ;;
        Darwin )
@@ -16,8 +16,6 @@
 #

 main() {
-    echo "Checking project is in GOPATH:"
-
    IFS=':' read -r -a paths <<< "$GOPATH"
    for path in "${paths[@]}"; do
        minio_path="$path/src/github.com/minio/minio"
@@ -0,0 +1,81 @@
+#!/bin/sh
+#
+# Minio Cloud Storage, (C) 2017 Minio, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# If command starts with an option, prepend minio.
+if [ "${1}" != "minio" ]; then
+    if [ -n "${1}" ]; then
+        set -- minio "$@"
+    fi
+fi
+
+# Wait for all the hosts to come online and have
+# their DNS entries populated properly.
+docker_wait_hosts() {
+    hosts="$@"
+    num_hosts=0
+    # Count number of hosts in arguments.
+    for host in $hosts; do
+        [ $(echo "$host" | grep -E "^http") ] || continue
+        num_hosts=$((num_hosts+1))
+    done
+    if [ $num_hosts -gt 0 ]; then
+        echo -n "Waiting for all hosts to resolve..."
+        while true; do
+            x=0
+            for host in $hosts; do
+                [ $(echo "$host" | grep -E "^http") ] || continue
+                # Extract the domain.
+                host=$(echo $host | sed -e 's/^http[s]\?:\/\/\([^\/]\+\).*/\1/')
+                echo -n .
+                val=$(ping -c 1 $host 2>/dev/null)
+                if [ $? != 0 ]; then
+                    echo "Failed to lookup $host"
+                    continue
+                fi
+                x=$((x+1))
+            done
+            # Provided hosts same as successful hosts, should break out.
+            test $x -eq $num_hosts && break
+            echo "Failed to resolve hosts.. retrying after 1 second."
+            sleep 1
+        done
+        echo "All hosts are resolving proceeding to initialize Minio."
+    fi
+}
+
+## Look for docker secrets in default documented location.
+docker_secrets_env() {
+    local MINIO_ACCESS_KEY_FILE="/run/secrets/access_key"
+    local MINIO_SECRET_KEY_FILE="/run/secrets/secret_key"
+
+    if [ -f $MINIO_ACCESS_KEY_FILE -a -f $MINIO_SECRET_KEY_FILE ]; then
+        if [ -f $MINIO_ACCESS_KEY_FILE ]; then
+            export MINIO_ACCESS_KEY="$(cat "$MINIO_ACCESS_KEY_FILE")"
+        fi
+        if [ -f $MINIO_SECRET_KEY_FILE ]; then
+            export MINIO_SECRET_KEY="$(cat "$MINIO_SECRET_KEY_FILE")"
+        fi
+    fi
+}
+
+## Set access env from secrets if necessary.
+docker_secrets_env
+
+## Wait for all the hosts to come online.
+docker_wait_hosts "$@"
+
+exec "$@"
@@ -27,8 +27,8 @@ import (
 )

 func genLDFlags(version string) string {
-	var ldflagsStr string
-	ldflagsStr = "-X github.com/minio/minio/cmd.Version=" + version
+	ldflagsStr := "-s -w"
+	ldflagsStr += " -X github.com/minio/minio/cmd.Version=" + version
 	ldflagsStr += " -X github.com/minio/minio/cmd.ReleaseTag=" + releaseTag(version)
 	ldflagsStr += " -X github.com/minio/minio/cmd.CommitID=" + commitID()
 	ldflagsStr += " -X github.com/minio/minio/cmd.ShortCommitID=" + commitID()[:12]
@@ -24,7 +24,9 @@ import (
 	"io/ioutil"
 	"net/http"
 	"net/url"
+	"path"
 	"strconv"
+	"sync"
 	"time"
 )

@@ -49,6 +51,7 @@ const (
 	mgmtDryRun         mgmtQueryKey = "dry-run"
 	mgmtUploadIDMarker mgmtQueryKey = "upload-id-marker"
 	mgmtMaxUploads     mgmtQueryKey = "max-uploads"
+	mgmtUploadID       mgmtQueryKey = "upload-id"
 )

 // ServerVersion - server version
@@ -205,14 +208,45 @@ type ServerConnStats struct {
 	Throughput       uint64 `json:"throughput,omitempty"`
 }

-// ServerInfo holds the information that will be returned by ServerInfo API
-type ServerInfo struct {
+// ServerHTTPMethodStats holds total number of HTTP operations from/to the server,
+// including the average duration the call was spent.
+type ServerHTTPMethodStats struct {
+	Count       uint64 `json:"count"`
+	AvgDuration string `json:"avgDuration"`
+}
+
+// ServerHTTPStats holds all type of http operations performed to/from the server
+// including their average execution time.
+type ServerHTTPStats struct {
+	TotalHEADStats     ServerHTTPMethodStats `json:"totalHEADs"`
+	SuccessHEADStats   ServerHTTPMethodStats `json:"successHEADs"`
+	TotalGETStats      ServerHTTPMethodStats `json:"totalGETs"`
+	SuccessGETStats    ServerHTTPMethodStats `json:"successGETs"`
+	TotalPUTStats      ServerHTTPMethodStats `json:"totalPUTs"`
+	SuccessPUTStats    ServerHTTPMethodStats `json:"successPUTs"`
+	TotalPOSTStats     ServerHTTPMethodStats `json:"totalPOSTs"`
+	SuccessPOSTStats   ServerHTTPMethodStats `json:"successPOSTs"`
+	TotalDELETEStats   ServerHTTPMethodStats `json:"totalDELETEs"`
+	SuccessDELETEStats ServerHTTPMethodStats `json:"successDELETEs"`
+}
+
+// ServerInfoData holds storage, connections and other
+// information of a given server.
+type ServerInfoData struct {
 	StorageInfo StorageInfo      `json:"storage"`
 	ConnStats   ServerConnStats  `json:"network"`
+	HTTPStats   ServerHTTPStats  `json:"http"`
 	Properties  ServerProperties `json:"server"`
 }

-// ServerInfoHandler - GET /?server-info
+// ServerInfo holds server information result of one node
+type ServerInfo struct {
+	Error string          `json:"error"`
+	Addr  string          `json:"addr"`
+	Data  *ServerInfoData `json:"data"`
+}
+
+// ServerInfoHandler - GET /?info
 // ----------
 // Get server information
 func (adminAPI adminAPIHandlers) ServerInfoHandler(w http.ResponseWriter, r *http.Request) {
@@ -223,58 +257,43 @@ func (adminAPI adminAPIHandlers) ServerInfoHandler(w http.ResponseWriter, r *htt
 		return
 	}

-	// Build storage info
-	objLayer := newObjectLayerFn()
-	if objLayer == nil {
-		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
-		return
-	}
-	storage := objLayer.StorageInfo()
+	// Web service response
+	reply := make([]ServerInfo, len(globalAdminPeers))

-	// Build list of enabled ARNs queues
-	var arns []string
-	for queueArn := range globalEventNotifier.GetAllExternalTargets() {
-		arns = append(arns, queueArn)
+	var wg sync.WaitGroup
+
+	// Gather server information for all nodes
+	for i, p := range globalAdminPeers {
+		wg.Add(1)
+
+		// Gather information from a peer in a goroutine
+		go func(idx int, peer adminPeer) {
+			defer wg.Done()
+
+			// Initialize server info at index
+			reply[idx] = ServerInfo{Addr: peer.addr}
+
+			serverInfoData, err := peer.cmdRunner.ServerInfoData()
+			if err != nil {
+				errorIf(err, "Unable to get server info from %s.", peer.addr)
+				reply[idx].Error = err.Error()
+				return
+			}
+
+			reply[idx].Data = &serverInfoData
+		}(i, p)
 	}

-	// Fetch uptimes from all peers. This may fail to due to lack
-	// of read-quorum availability.
-	uptime, err := getPeerUptimes(globalAdminPeers)
-	if err != nil {
-		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
-		errorIf(err, "Unable to get uptime from majority of servers.")
-		return
-	}
-
-	// Build server properties information
-	properties := ServerProperties{
-		Version:  Version,
-		CommitID: CommitID,
-		Region:   serverConfig.GetRegion(),
-		SQSARN:   arns,
-		Uptime:   uptime,
-	}
-
-	// Build network info
-	connStats := ServerConnStats{
-		TotalInputBytes:  globalConnStats.getTotalInputBytes(),
-		TotalOutputBytes: globalConnStats.getTotalOutputBytes(),
-	}
-
-	// Build the whole returned information
-	info := ServerInfo{
-		StorageInfo: storage,
-		ConnStats:   connStats,
-		Properties:  properties,
-	}
+	wg.Wait()

 	// Marshal API response
-	jsonBytes, err := json.Marshal(info)
+	jsonBytes, err := json.Marshal(reply)
 	if err != nil {
 		writeErrorResponse(w, ErrInternalError, r.URL)
 		errorIf(err, "Failed to marshal storage info into json.")
 		return
 	}
+
 	// Reply with storage information (across nodes in a
 	// distributed setup) as json.
 	writeSuccessResponseJSON(w, jsonBytes)
@@ -602,6 +621,42 @@ func isDryRun(qval url.Values) bool {
 	return false
 }

+// healResult - represents result of a heal operation like
+// heal-object, heal-upload.
+type healResult struct {
+	State healState `json:"state"`
+}
+
+// healState - different states of heal operation
+type healState int
+
+const (
+	// healNone - none of the disks healed
+	healNone healState = iota
+	// healPartial - some disks were healed, others were offline
+	healPartial
+	// healOK - all disks were healed
+	healOK
+)
+
+// newHealResult - returns healResult given number of disks healed and
+// number of disks offline
+func newHealResult(numHealedDisks, numOfflineDisks int) healResult {
+	var state healState
+	switch {
+	case numHealedDisks == 0:
+		state = healNone
+
+	case numOfflineDisks > 0:
+		state = healPartial
+
+	default:
+		state = healOK
+	}
+
+	return healResult{State: state}
+}
+
 // HealObjectHandler - POST /?heal&bucket=mybucket&object=myobject&dry-run
 // - x-minio-operation = object
 // - bucket and object are both mandatory query parameters
@@ -644,14 +699,95 @@ func (adminAPI adminAPIHandlers) HealObjectHandler(w http.ResponseWriter, r *htt
 		return
 	}

-	err := objLayer.HealObject(bucket, object)
+	numOfflineDisks, numHealedDisks, err := objLayer.HealObject(bucket, object)
+	if err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	jsonBytes, err := json.Marshal(newHealResult(numHealedDisks, numOfflineDisks))
 	if err != nil {
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}

 	// Return 200 on success.
-	writeSuccessResponseHeadersOnly(w)
+	writeSuccessResponseJSON(w, jsonBytes)
+}
+
+// HealUploadHandler - POST /?heal&bucket=mybucket&object=myobject&upload-id=myuploadID&dry-run
+// - x-minio-operation = upload
+// - bucket, object and upload-id are mandatory query parameters
+// Heal a given upload, if present.
+func (adminAPI adminAPIHandlers) HealUploadHandler(w http.ResponseWriter, r *http.Request) {
+	// Get object layer instance.
+	objLayer := newObjectLayerFn()
+	if objLayer == nil {
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		return
+	}
+
+	// Validate request signature.
+	adminAPIErr := checkRequestAuthType(r, "", "", "")
+	if adminAPIErr != ErrNone {
+		writeErrorResponse(w, adminAPIErr, r.URL)
+		return
+	}
+
+	vars := r.URL.Query()
+	bucket := vars.Get(string(mgmtBucket))
+	object := vars.Get(string(mgmtObject))
+	uploadID := vars.Get(string(mgmtUploadID))
+	uploadObj := path.Join(bucket, object, uploadID)
+
+	// Validate bucket and object names as supplied via query
+	// parameters.
+	if err := checkBucketAndObjectNames(bucket, object); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	// Validate the bucket and object w.r.t backend representation
+	// of an upload.
+	if err := checkBucketAndObjectNames(minioMetaMultipartBucket,
+		uploadObj); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	// Check if upload exists.
+	if _, err := objLayer.GetObjectInfo(minioMetaMultipartBucket,
+		uploadObj); err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	// if dry-run is set in query params then perform validations
+	// and return success.
+	if isDryRun(vars) {
+		writeSuccessResponseHeadersOnly(w)
+		return
+	}
+
+	//We are able to use HealObject for healing an upload since an
+	//ongoing upload has the same backend representation as an
+	//object.  The 'object' corresponding to a given bucket,
+	//object and uploadID is
+	//.minio.sys/multipart/bucket/object/uploadID.
+	numOfflineDisks, numHealedDisks, err := objLayer.HealObject(minioMetaMultipartBucket, uploadObj)
+	if err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	jsonBytes, err := json.Marshal(newHealResult(numHealedDisks, numOfflineDisks))
+	if err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	// Return 200 on success.
+	writeSuccessResponseJSON(w, jsonBytes)
 }

 // HealFormatHandler - POST /?heal&dry-run
@@ -21,10 +21,12 @@ import (
 	"encoding/json"
 	"encoding/xml"
 	"fmt"
+	"io"
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
+	"reflect"
 	"testing"
 	"time"

@@ -154,14 +156,9 @@ func prepareAdminXLTestBed() (*adminXLTestBed, error) {
 	}

 	// Initialize boot time
-	globalBootTime = time.Now().UTC()
+	globalBootTime = UTCNow()

-	// Set globalEndpoints for a single node XL setup.
-	for _, xlDir := range xlDirs {
-		globalEndpoints = append(globalEndpoints, &url.URL{
-			Path: xlDir,
-		})
-	}
+	globalEndpoints = mustGetNewEndpointList(xlDirs...)

 	// Set globalIsXL to indicate that the setup uses an erasure code backend.
 	globalIsXL = true
@@ -299,14 +296,8 @@ func testServicesCmdHandler(cmd cmdType, t *testing.T) {
 	// Initialize admin peers to make admin RPC calls. Note: In a
 	// single node setup, this degenerates to a simple function
 	// call under the hood.
-	eps, err := parseStorageEndpoints([]string{"http://127.0.0.1"})
-	if err != nil {
-		t.Fatalf("Failed to parse storage end point - %v", err)
-	}
-
-	// Set globalMinioAddr to be able to distinguish local endpoints from remote.
-	globalMinioAddr = eps[0].Host
-	initGlobalAdminPeers(eps)
+	globalMinioAddr = "127.0.0.1:9000"
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))

 	// Setting up a go routine to simulate ServerMux's
 	// handleServiceSignals for stop and restart commands.
@@ -365,14 +356,8 @@ func TestServiceSetCreds(t *testing.T) {
 	// Initialize admin peers to make admin RPC calls. Note: In a
 	// single node setup, this degenerates to a simple function
 	// call under the hood.
-	eps, err := parseStorageEndpoints([]string{"http://127.0.0.1"})
-	if err != nil {
-		t.Fatalf("Failed to parse storage end point - %v", err)
-	}
-
-	// Set globalMinioAddr to be able to distinguish local endpoints from remote.
-	globalMinioAddr = eps[0].Host
-	initGlobalAdminPeers(eps)
+	globalMinioAddr = "127.0.0.1:9000"
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))

 	credentials := serverConfig.GetCredential()
 	var body []byte
@@ -453,14 +438,8 @@ func TestListLocksHandler(t *testing.T) {
 	defer adminTestBed.TearDown()

 	// Initialize admin peers to make admin RPC calls.
-	eps, err := parseStorageEndpoints([]string{"http://127.0.0.1"})
-	if err != nil {
-		t.Fatalf("Failed to parse storage end point - %v", err)
-	}
-
-	// Set globalMinioAddr to be able to distinguish local endpoints from remote.
-	globalMinioAddr = eps[0].Host
-	initGlobalAdminPeers(eps)
+	globalMinioAddr = "127.0.0.1:9000"
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))

 	testCases := []struct {
 		bucket         string
@@ -528,11 +507,7 @@ func TestClearLocksHandler(t *testing.T) {
 	defer adminTestBed.TearDown()

 	// Initialize admin peers to make admin RPC calls.
-	eps, err := parseStorageEndpoints([]string{"http://127.0.0.1"})
-	if err != nil {
-		t.Fatalf("Failed to parse storage end point - %v", err)
-	}
-	initGlobalAdminPeers(eps)
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))

 	testCases := []struct {
 		bucket         string
@@ -756,7 +731,7 @@ func TestListObjectsHealHandler(t *testing.T) {
 	}
 	defer adminTestBed.TearDown()

-	err = adminTestBed.objLayer.MakeBucket("mybucket")
+	err = adminTestBed.objLayer.MakeBucketWithLocation("mybucket", "")
 	if err != nil {
 		t.Fatalf("Failed to make bucket - %v", err)
 	}
@@ -884,7 +859,7 @@ func TestHealBucketHandler(t *testing.T) {
 	}
 	defer adminTestBed.TearDown()

-	err = adminTestBed.objLayer.MakeBucket("mybucket")
+	err = adminTestBed.objLayer.MakeBucketWithLocation("mybucket", "")
 	if err != nil {
 		t.Fatalf("Failed to make bucket - %v", err)
 	}
@@ -961,7 +936,7 @@ func TestHealObjectHandler(t *testing.T) {
 	// Create an object myobject under bucket mybucket.
 	bucketName := "mybucket"
 	objName := "myobject"
-	err = adminTestBed.objLayer.MakeBucket(bucketName)
+	err = adminTestBed.objLayer.MakeBucketWithLocation(bucketName, "")
 	if err != nil {
 		t.Fatalf("Failed to make bucket %s - %v", bucketName, err)
 	}
@@ -1048,6 +1023,160 @@ func TestHealObjectHandler(t *testing.T) {
 			t.Errorf("Test %d - Expected HTTP status code %d but received %d", i+1, test.statusCode, rec.Code)
 		}
 	}
+
+}
+
+// buildAdminRequest - helper function to build an admin API request.
+func buildAdminRequest(queryVal url.Values, opHdr, method string,
+	contentLength int64, bodySeeker io.ReadSeeker) (*http.Request, error) {
+	req, err := newTestRequest(method, "/?"+queryVal.Encode(), contentLength, bodySeeker)
+	if err != nil {
+		return nil, traceError(err)
+	}
+
+	req.Header.Set(minioAdminOpHeader, opHdr)
+
+	cred := serverConfig.GetCredential()
+	err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
+	if err != nil {
+		return nil, traceError(err)
+	}
+
+	return req, nil
+}
+
+// mkHealUploadQuery - helper to build HealUploadHandler query string.
+func mkHealUploadQuery(bucket, object, uploadID, dryRun string) url.Values {
+	queryVal := url.Values{}
+	queryVal.Set(string(mgmtBucket), bucket)
+	queryVal.Set(string(mgmtObject), object)
+	queryVal.Set(string(mgmtUploadID), uploadID)
+	queryVal.Set("heal", "")
+	queryVal.Set(string(mgmtDryRun), dryRun)
+	return queryVal
+}
+
+// TestHealUploadHandler - test for HealUploadHandler.
+func TestHealUploadHandler(t *testing.T) {
+	adminTestBed, err := prepareAdminXLTestBed()
+	if err != nil {
+		t.Fatal("Failed to initialize a single node XL backend for admin handler tests.")
+	}
+	defer adminTestBed.TearDown()
+
+	// Create an object myobject under bucket mybucket.
+	bucketName := "mybucket"
+	objName := "myobject"
+	err = adminTestBed.objLayer.MakeBucketWithLocation(bucketName, "")
+	if err != nil {
+		t.Fatalf("Failed to make bucket %s - %v", bucketName, err)
+	}
+
+	// Create a new multipart upload.
+	uploadID, err := adminTestBed.objLayer.NewMultipartUpload(bucketName, objName, nil)
+	if err != nil {
+		t.Fatalf("Failed to create a new multipart upload %s/%s - %v",
+			bucketName, objName, err)
+	}
+
+	// Upload a part.
+	partID := 1
+	_, err = adminTestBed.objLayer.PutObjectPart(bucketName, objName, uploadID,
+		partID, int64(len("hello")), bytes.NewReader([]byte("hello")), "", "")
+	if err != nil {
+		t.Fatalf("Failed to upload part %d of %s/%s - %v", partID,
+			bucketName, objName, err)
+	}
+
+	testCases := []struct {
+		bucket     string
+		object     string
+		dryrun     string
+		statusCode int
+	}{
+		// 1. Valid test case.
+		{
+			bucket:     bucketName,
+			object:     objName,
+			statusCode: http.StatusOK,
+		},
+		// 2. Invalid bucket name.
+		{
+			bucket:     `invalid\\Bucket`,
+			object:     "myobject",
+			statusCode: http.StatusBadRequest,
+		},
+		// 3. Bucket not found.
+		{
+			bucket:     "bucketnotfound",
+			object:     "myobject",
+			statusCode: http.StatusNotFound,
+		},
+		// 4. Invalid object name.
+		{
+			bucket:     bucketName,
+			object:     `invalid\\Object`,
+			statusCode: http.StatusBadRequest,
+		},
+		// 5. Object not found.
+		{
+			bucket:     bucketName,
+			object:     "objectnotfound",
+			statusCode: http.StatusNotFound,
+		},
+		// 6. Valid test case with dry-run.
+		{
+			bucket:     bucketName,
+			object:     objName,
+			dryrun:     "yes",
+			statusCode: http.StatusOK,
+		},
+	}
+	for i, test := range testCases {
+		// Prepare query params.
+		queryVal := mkHealUploadQuery(test.bucket, test.object, uploadID, test.dryrun)
+		req, err1 := buildAdminRequest(queryVal, "upload", http.MethodPost, 0, nil)
+		if err1 != nil {
+			t.Fatalf("Test %d - Failed to construct heal object request - %v", i+1, err1)
+		}
+		rec := httptest.NewRecorder()
+		adminTestBed.mux.ServeHTTP(rec, req)
+		if test.statusCode != rec.Code {
+			t.Errorf("Test %d - Expected HTTP status code %d but received %d", i+1, test.statusCode, rec.Code)
+		}
+	}
+
+	sample := testCases[0]
+	// Modify authorization header after signing to test signature
+	// mismatch handling.
+	queryVal := mkHealUploadQuery(sample.bucket, sample.object, uploadID, sample.dryrun)
+	req, err := buildAdminRequest(queryVal, "upload", "POST", 0, nil)
+	if err != nil {
+		t.Fatalf("Failed to construct heal object request - %v", err)
+	}
+
+	// Set x-amz-date to a date different than time of signing.
+	req.Header.Set("x-amz-date", time.Time{}.Format(iso8601Format))
+
+	rec := httptest.NewRecorder()
+	adminTestBed.mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusForbidden {
+		t.Errorf("Expected %d but received %d", http.StatusBadRequest, rec.Code)
+	}
+
+	// Set objectAPI to nil to test Server not initialized case.
+	resetGlobalObjectAPI()
+	queryVal = mkHealUploadQuery(sample.bucket, sample.object, uploadID, sample.dryrun)
+	req, err = buildAdminRequest(queryVal, "upload", "POST", 0, nil)
+	if err != nil {
+		t.Fatalf("Failed to construct heal object request - %v", err)
+	}
+
+	rec = httptest.NewRecorder()
+	adminTestBed.mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusServiceUnavailable {
+		t.Errorf("Expected %d but received %d", http.StatusServiceUnavailable, rec.Code)
+	}
 }

 // TestHealFormatHandler - test for HealFormatHandler.
@@ -1061,21 +1190,11 @@ func TestHealFormatHandler(t *testing.T) {
 	// Prepare query params for heal-format mgmt REST API.
 	queryVal := url.Values{}
 	queryVal.Set("heal", "")
-	req, err := newTestRequest("POST", "/?"+queryVal.Encode(), 0, nil)
+	req, err := buildAdminRequest(queryVal, "format", "POST", 0, nil)
 	if err != nil {
 		t.Fatalf("Failed to construct heal object request - %v", err)
 	}

-	// Set x-minio-operation header to format.
-	req.Header.Set(minioAdminOpHeader, "format")
-
-	// Sign the request using signature v4.
-	cred := serverConfig.GetCredential()
-	err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
-	if err != nil {
-		t.Fatalf("Failed to sign heal object request - %v", err)
-	}
-
 	rec := httptest.NewRecorder()
 	adminTestBed.mux.ServeHTTP(rec, req)
 	if rec.Code != http.StatusOK {
@@ -1092,34 +1211,18 @@ func TestGetConfigHandler(t *testing.T) {
 	defer adminTestBed.TearDown()

 	// Initialize admin peers to make admin RPC calls.
-	eps, err := parseStorageEndpoints([]string{"http://127.0.0.1"})
-	if err != nil {
-		t.Fatalf("Failed to parse storage end point - %v", err)
-	}
-
-	// Set globalMinioAddr to be able to distinguish local endpoints from remote.
-	globalMinioAddr = eps[0].Host
-	initGlobalAdminPeers(eps)
+	globalMinioAddr = "127.0.0.1:9000"
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))

 	// Prepare query params for get-config mgmt REST API.
 	queryVal := url.Values{}
 	queryVal.Set("config", "")

-	req, err := newTestRequest("GET", "/?"+queryVal.Encode(), 0, nil)
+	req, err := buildAdminRequest(queryVal, "get", http.MethodGet, 0, nil)
 	if err != nil {
 		t.Fatalf("Failed to construct get-config object request - %v", err)
 	}

-	// Set x-minio-operation header to get.
-	req.Header.Set(minioAdminOpHeader, "get")
-
-	// Sign the request using signature v4.
-	cred := serverConfig.GetCredential()
-	err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
-	if err != nil {
-		t.Fatalf("Failed to sign heal object request - %v", err)
-	}
-
 	rec := httptest.NewRecorder()
 	adminTestBed.mux.ServeHTTP(rec, req)
 	if rec.Code != http.StatusOK {
@@ -1137,14 +1240,8 @@ func TestSetConfigHandler(t *testing.T) {
 	defer adminTestBed.TearDown()

 	// Initialize admin peers to make admin RPC calls.
-	eps, err := parseStorageEndpoints([]string{"http://127.0.0.1"})
-	if err != nil {
-		t.Fatalf("Failed to parse storage end point - %v", err)
-	}
-
-	// Set globalMinioAddr to be able to distinguish local endpoints from remote.
-	globalMinioAddr = eps[0].Host
-	initGlobalAdminPeers(eps)
+	globalMinioAddr = "127.0.0.1:9000"
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))

 	// SetConfigHandler restarts minio setup - need to start a
 	// signal receiver to receive on globalServiceSignalCh.
@@ -1154,21 +1251,12 @@ func TestSetConfigHandler(t *testing.T) {
 	queryVal := url.Values{}
 	queryVal.Set("config", "")

-	req, err := newTestRequest("PUT", "/?"+queryVal.Encode(), int64(len(configJSON)), bytes.NewReader(configJSON))
+	req, err := buildAdminRequest(queryVal, "set", http.MethodPut, int64(len(configJSON)),
+		bytes.NewReader(configJSON))
 	if err != nil {
 		t.Fatalf("Failed to construct get-config object request - %v", err)
 	}

-	// Set x-minio-operation header to set.
-	req.Header.Set(minioAdminOpHeader, "set")
-
-	// Sign the request using signature v4.
-	cred := serverConfig.GetCredential()
-	err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
-	if err != nil {
-		t.Fatalf("Failed to sign heal object request - %v", err)
-	}
-
 	rec := httptest.NewRecorder()
 	adminTestBed.mux.ServeHTTP(rec, req)
 	if rec.Code != http.StatusOK {
@@ -1186,6 +1274,58 @@ func TestSetConfigHandler(t *testing.T) {
 	}
 }

+func TestAdminServerInfo(t *testing.T) {
+	adminTestBed, err := prepareAdminXLTestBed()
+	if err != nil {
+		t.Fatal("Failed to initialize a single node XL backend for admin handler tests.")
+	}
+	defer adminTestBed.TearDown()
+
+	// Initialize admin peers to make admin RPC calls.
+	globalMinioAddr = "127.0.0.1:9000"
+	initGlobalAdminPeers(mustGetNewEndpointList("http://127.0.0.1:9000/d1"))
+
+	// Prepare query params for set-config mgmt REST API.
+	queryVal := url.Values{}
+	queryVal.Set("info", "")
+
+	req, err := buildAdminRequest(queryVal, "", http.MethodGet, 0, nil)
+	if err != nil {
+		t.Fatalf("Failed to construct get-config object request - %v", err)
+	}
+
+	rec := httptest.NewRecorder()
+	adminTestBed.mux.ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Errorf("Expected to succeed but failed with %d", rec.Code)
+	}
+
+	results := []ServerInfo{}
+	err = json.NewDecoder(rec.Body).Decode(&results)
+	if err != nil {
+		t.Fatalf("Failed to decode set config result json %v", err)
+	}
+
+	if len(results) == 0 {
+		t.Error("Expected at least one server info result")
+	}
+
+	for _, serverInfo := range results {
+		if len(serverInfo.Addr) == 0 {
+			t.Error("Expected server address to be non empty")
+		}
+		if serverInfo.Error != "" {
+			t.Errorf("Unexpected error = %v\n", serverInfo.Error)
+		}
+		if serverInfo.Data.StorageInfo.Free == 0 {
+			t.Error("Expected StorageInfo.Free to be non empty")
+		}
+		if serverInfo.Data.Properties.Region != globalMinioDefaultRegion {
+			t.Errorf("Expected %s, got %s", globalMinioDefaultRegion, serverInfo.Data.Properties.Region)
+		}
+	}
+}
+
 // TestToAdminAPIErr - test for toAdminAPIErr helper function.
 func TestToAdminAPIErr(t *testing.T) {
 	testCases := []struct {
@@ -1219,6 +1359,11 @@ func TestToAdminAPIErr(t *testing.T) {
 }

 func TestWriteSetConfigResponse(t *testing.T) {
+	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer removeAll(rootPath)
 	testCases := []struct {
 		status bool
 		errs   []error
@@ -1250,7 +1395,7 @@ func TestWriteSetConfigResponse(t *testing.T) {
 		},
 	}

-	testURL, err := url.Parse("dummy.com")
+	testURL, err := url.Parse("http://dummy.com")
 	if err != nil {
 		t.Fatalf("Failed to parse a place-holder url")
 	}
@@ -1288,9 +1433,9 @@ func TestWriteSetConfigResponse(t *testing.T) {
 	}
 }

-// mkUploadsHealQuery - helper function to construct query values for
+// mkListUploadsHealQuery - helper function to construct query values for
 // listUploadsHeal.
-func mkUploadsHealQuery(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploadsStr string) url.Values {
+func mkListUploadsHealQuery(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploadsStr string) url.Values {

 	queryVal := make(url.Values)
 	queryVal.Set("heal", "")
@@ -1310,7 +1455,7 @@ func TestListHealUploadsHandler(t *testing.T) {
 	}
 	defer adminTestBed.TearDown()

-	err = adminTestBed.objLayer.MakeBucket("mybucket")
+	err = adminTestBed.objLayer.MakeBucketWithLocation("mybucket", "")
 	if err != nil {
 		t.Fatalf("Failed to make bucket - %v", err)
 	}
@@ -1319,12 +1464,13 @@ func TestListHealUploadsHandler(t *testing.T) {
 	defer adminTestBed.objLayer.DeleteBucket("mybucket")

 	testCases := []struct {
-		bucket     string
-		prefix     string
-		keyMarker  string
-		delimiter  string
-		maxKeys    string
-		statusCode int
+		bucket       string
+		prefix       string
+		keyMarker    string
+		delimiter    string
+		maxKeys      string
+		statusCode   int
+		expectedResp ListMultipartUploadsResponse
 	}{
 		// 1. Valid params.
 		{
@@ -1334,6 +1480,14 @@ func TestListHealUploadsHandler(t *testing.T) {
 			delimiter:  "/",
 			maxKeys:    "10",
 			statusCode: http.StatusOK,
+			expectedResp: ListMultipartUploadsResponse{
+				XMLName:    xml.Name{Space: "http://s3.amazonaws.com/doc/2006-03-01/", Local: "ListMultipartUploadsResult"},
+				Bucket:     "mybucket",
+				KeyMarker:  "prefix11",
+				Delimiter:  "/",
+				Prefix:     "prefix",
+				MaxUploads: 10,
+			},
 		},
 		// 2. Valid params with empty prefix.
 		{
@@ -1343,6 +1497,14 @@ func TestListHealUploadsHandler(t *testing.T) {
 			delimiter:  "/",
 			maxKeys:    "10",
 			statusCode: http.StatusOK,
+			expectedResp: ListMultipartUploadsResponse{
+				XMLName:    xml.Name{Space: "http://s3.amazonaws.com/doc/2006-03-01/", Local: "ListMultipartUploadsResult"},
+				Bucket:     "mybucket",
+				KeyMarker:  "",
+				Delimiter:  "/",
+				Prefix:     "",
+				MaxUploads: 10,
+			},
 		},
 		// 3. Invalid params with invalid bucket.
 		{
@@ -1401,23 +1563,64 @@ func TestListHealUploadsHandler(t *testing.T) {
 	}

 	for i, test := range testCases {
-		queryVal := mkUploadsHealQuery(test.bucket, test.prefix, test.keyMarker, "", test.delimiter, test.maxKeys)
+		queryVal := mkListUploadsHealQuery(test.bucket, test.prefix, test.keyMarker, "", test.delimiter, test.maxKeys)

-		req, err := newTestRequest("GET", "/?"+queryVal.Encode(), 0, nil)
+		req, err := buildAdminRequest(queryVal, "list-uploads", http.MethodGet, 0, nil)
 		if err != nil {
 			t.Fatalf("Test %d - Failed to construct list uploads needing heal request - %v", i+1, err)
 		}
-		req.Header.Set(minioAdminOpHeader, "list-uploads")

-		cred := serverConfig.GetCredential()
-		err = signRequestV4(req, cred.AccessKey, cred.SecretKey)
-		if err != nil {
-			t.Fatalf("Test %d - Failed to sign list uploads needing heal request - %v", i+1, err)
-		}
 		rec := httptest.NewRecorder()
 		adminTestBed.mux.ServeHTTP(rec, req)
+
 		if test.statusCode != rec.Code {
 			t.Errorf("Test %d - Expected HTTP status code %d but received %d", i+1, test.statusCode, rec.Code)
 		}
+
+		// Compare result with the expected one only when we receive 200 OK
+		if rec.Code == http.StatusOK {
+			resp := rec.Result()
+			xmlBytes, err := ioutil.ReadAll(resp.Body)
+			if err != nil {
+				t.Errorf("Test %d: Failed to read response %v", i+1, err)
+			}
+
+			var actualResult ListMultipartUploadsResponse
+			err = xml.Unmarshal(xmlBytes, &actualResult)
+			if err != nil {
+				t.Errorf("Test %d: Failed to unmarshal xml %v", i+1, err)
+			}
+
+			if !reflect.DeepEqual(test.expectedResp, actualResult) {
+				t.Fatalf("Test %d: Unexpected response `%+v`, expected: `%+v`", i+1, test.expectedResp, actualResult)
+			}
+		}
+
+	}
+}
+
+// Test for newHealResult helper function.
+func TestNewHealResult(t *testing.T) {
+	testCases := []struct {
+		healedDisks  int
+		offlineDisks int
+		state        healState
+	}{
+		// 1. No disks healed, no disks offline.
+		{0, 0, healNone},
+		// 2. No disks healed, non-zero disks offline.
+		{0, 1, healNone},
+		// 3. Non-zero disks healed, no disks offline.
+		{1, 0, healOK},
+		// 4. Non-zero disks healed, non-zero disks offline.
+		{1, 1, healPartial},
+	}
+
+	for i, test := range testCases {
+		actual := newHealResult(test.healedDisks, test.offlineDisks)
+		if actual.State != test.state {
+			t.Errorf("Test %d: Expected %v but received %v", i+1,
+				test.state, actual.State)
+		}
 	}
 }
@@ -64,6 +64,8 @@ func registerAdminRouter(mux *router.Router) {
 	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)

 	/// Config operations

@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2014-2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 2014, 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.
@@ -20,7 +20,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"net/url"
+	"net"
 	"os"
 	"path"
 	"path/filepath"
@@ -28,6 +28,8 @@ import (
 	"sort"
 	"sync"
 	"time"
+
+	"github.com/minio/minio-go/pkg/set"
 )

 const (
@@ -35,7 +37,7 @@ const (
 	serviceRestartRPC = "Admin.Restart"
 	listLocksRPC      = "Admin.ListLocks"
 	reInitDisksRPC    = "Admin.ReInitDisks"
-	uptimeRPC         = "Admin.Uptime"
+	serverInfoDataRPC = "Admin.ServerInfoData"
 	getConfigRPC      = "Admin.GetConfig"
 	writeTmpConfigRPC = "Admin.WriteTmpConfig"
 	commitConfigRPC   = "Admin.CommitConfig"
@@ -57,7 +59,7 @@ type adminCmdRunner interface {
 	Restart() error
 	ListLocks(bucket, prefix string, duration time.Duration) ([]VolumeLockInfo, error)
 	ReInitDisks() error
-	Uptime() (time.Duration, error)
+	ServerInfoData() (ServerInfoData, error)
 	GetConfig() ([]byte, error)
 	WriteTmpConfig(tmpFileName string, configBytes []byte) error
 	CommitConfig(tmpFileName string) error
@@ -110,26 +112,48 @@ func (rc remoteAdminClient) ReInitDisks() error {
 	return rc.Call(reInitDisksRPC, &args, &reply)
 }

-// Uptime - Returns the uptime of this server. Timestamp is taken
-// after object layer is initialized.
-func (lc localAdminClient) Uptime() (time.Duration, error) {
+// ServerInfoData - Returns the server info of this server.
+func (lc localAdminClient) ServerInfoData() (ServerInfoData, error) {
 	if globalBootTime.IsZero() {
-		return time.Duration(0), errServerNotInitialized
+		return ServerInfoData{}, errServerNotInitialized
 	}

-	return time.Now().UTC().Sub(globalBootTime), nil
+	// Build storage info
+	objLayer := newObjectLayerFn()
+	if objLayer == nil {
+		return ServerInfoData{}, errServerNotInitialized
+	}
+	storage := objLayer.StorageInfo()
+
+	var arns []string
+	for queueArn := range globalEventNotifier.GetAllExternalTargets() {
+		arns = append(arns, queueArn)
+	}
+
+	return ServerInfoData{
+		StorageInfo: storage,
+		ConnStats:   globalConnStats.toServerConnStats(),
+		HTTPStats:   globalHTTPStats.toServerHTTPStats(),
+		Properties: ServerProperties{
+			Uptime:   UTCNow().Sub(globalBootTime),
+			Version:  Version,
+			CommitID: CommitID,
+			SQSARN:   arns,
+			Region:   serverConfig.GetRegion(),
+		},
+	}, nil
 }

-// Uptime - returns the uptime of the server to which the RPC call is made.
-func (rc remoteAdminClient) Uptime() (time.Duration, error) {
+// ServerInfo - returns the server info of the server to which the RPC call is made.
+func (rc remoteAdminClient) ServerInfoData() (ServerInfoData, error) {
 	args := AuthRPCArgs{}
-	reply := UptimeReply{}
-	err := rc.Call(uptimeRPC, &args, &reply)
+	reply := ServerInfoDataReply{}
+	err := rc.Call(serverInfoDataRPC, &args, &reply)
 	if err != nil {
-		return time.Duration(0), err
+		return ServerInfoData{}, err
 	}

-	return reply.Uptime, nil
+	return reply.ServerInfoData, nil
 }

 // GetConfig - returns config.json of the local server.
@@ -211,52 +235,43 @@ type adminPeer struct {
 type adminPeers []adminPeer

 // makeAdminPeers - helper function to construct a collection of adminPeer.
-func makeAdminPeers(eps []*url.URL) adminPeers {
-	var servicePeers []adminPeer
-
-	// map to store peers that are already added to ret
-	seenAddr := make(map[string]bool)
-
-	// add local (self) as peer in the array
-	servicePeers = append(servicePeers, adminPeer{
-		globalMinioAddr,
+func makeAdminPeers(endpoints EndpointList) (adminPeerList adminPeers) {
+	thisPeer := globalMinioAddr
+	if globalMinioHost == "" {
+		thisPeer = net.JoinHostPort("localhost", globalMinioPort)
+	}
+	adminPeerList = append(adminPeerList, adminPeer{
+		thisPeer,
 		localAdminClient{},
 	})
-	seenAddr[globalMinioAddr] = true

-	serverCred := serverConfig.GetCredential()
-	// iterate over endpoints to find new remote peers and add
-	// them to ret.
-	for _, ep := range eps {
-		if ep.Host == "" {
+	hostSet := set.CreateStringSet(globalMinioAddr)
+	cred := serverConfig.GetCredential()
+	serviceEndpoint := path.Join(minioReservedBucketPath, adminPath)
+	for _, host := range GetRemotePeers(endpoints) {
+		if hostSet.Contains(host) {
 			continue
 		}
-
-		// Check if the remote host has been added already
-		if !seenAddr[ep.Host] {
-			cfg := authConfig{
-				accessKey:       serverCred.AccessKey,
-				secretKey:       serverCred.SecretKey,
-				serverAddr:      ep.Host,
+		hostSet.Add(host)
+		adminPeerList = append(adminPeerList, adminPeer{
+			addr: host,
+			cmdRunner: &remoteAdminClient{newAuthRPCClient(authConfig{
+				accessKey:       cred.AccessKey,
+				secretKey:       cred.SecretKey,
+				serverAddr:      host,
+				serviceEndpoint: serviceEndpoint,
 				secureConn:      globalIsSSL,
-				serviceEndpoint: path.Join(minioReservedBucketPath, adminPath),
 				serviceName:     "Admin",
-			}
-
-			servicePeers = append(servicePeers, adminPeer{
-				addr:      ep.Host,
-				cmdRunner: &remoteAdminClient{newAuthRPCClient(cfg)},
-			})
-			seenAddr[ep.Host] = true
-		}
+			})},
+		})
 	}

-	return servicePeers
+	return adminPeerList
 }

 // Initialize global adminPeer collection.
-func initGlobalAdminPeers(eps []*url.URL) {
-	globalAdminPeers = makeAdminPeers(eps)
+func initGlobalAdminPeers(endpoints EndpointList) {
+	globalAdminPeers = makeAdminPeers(endpoints)
 }

 // invokeServiceCmd - Invoke Restart command.
@@ -380,7 +395,7 @@ func getPeerUptimes(peers adminPeers) (time.Duration, error) {
 	// the setup is the uptime of the single minio server
 	// instance.
 	if !globalIsDistXL {
-		return time.Now().UTC().Sub(globalBootTime), nil
+		return UTCNow().Sub(globalBootTime), nil
 	}

 	uptimes := make(uptimeSlice, len(peers))
@@ -391,7 +406,8 @@ func getPeerUptimes(peers adminPeers) (time.Duration, error) {
 		wg.Add(1)
 		go func(idx int, peer adminPeer) {
 			defer wg.Done()
-			uptimes[idx].uptime, uptimes[idx].err = peer.cmdRunner.Uptime()
+			serverInfoData, rpcErr := peer.cmdRunner.ServerInfoData()
+			uptimes[idx].uptime, uptimes[idx].err = serverInfoData.Properties.Uptime, rpcErr
 		}(i, peer)
 	}
 	wg.Wait()
@@ -245,7 +245,7 @@ func TestGetValidServerConfig(t *testing.T) {

 	// Invalid config - no quorum.
 	serverConfigs = []serverConfigV13{c1, c2, c2, c1}
-	validConfig, err = getValidServerConfig(serverConfigs, noErrs)
+	_, err = getValidServerConfig(serverConfigs, noErrs)
 	if err != errXLWriteQuorum {
 		t.Errorf("Expected to fail due to lack of quorum but received %v", err)
 	}
@@ -253,7 +253,7 @@ func TestGetValidServerConfig(t *testing.T) {
 	// All errors
 	allErrs := []error{errDiskNotFound, errDiskNotFound, errDiskNotFound, errDiskNotFound}
 	serverConfigs = []serverConfigV13{{}, {}, {}, {}}
-	validConfig, err = getValidServerConfig(serverConfigs, allErrs)
+	_, err = getValidServerConfig(serverConfigs, allErrs)
 	if err != errXLWriteQuorum {
 		t.Errorf("Expected to fail due to lack of quorum but received %v", err)
 	}
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -53,10 +53,10 @@ type ListLocksReply struct {
 	volLocks []VolumeLockInfo
 }

-// UptimeReply - wraps the uptime response over RPC.
-type UptimeReply struct {
+// ServerInfoDataReply - wraps the server info response over RPC.
+type ServerInfoDataReply struct {
 	AuthRPCReply
-	Uptime time.Duration
+	ServerInfoData ServerInfoData
 }

 // ConfigReply - wraps the server config response over RPC.
@@ -122,8 +122,8 @@ func (s *adminCmd) ReInitDisks(args *AuthRPCArgs, reply *AuthRPCReply) error {
 	return nil
 }

-// Uptime - returns the time when object layer was initialized on this server.
-func (s *adminCmd) Uptime(args *AuthRPCArgs, reply *UptimeReply) error {
+// ServerInfo - returns the server info when object layer was initialized on this server.
+func (s *adminCmd) ServerInfoData(args *AuthRPCArgs, reply *ServerInfoDataReply) error {
 	if err := args.IsAuthenticated(); err != nil {
 		return err
 	}
@@ -132,12 +132,29 @@ func (s *adminCmd) Uptime(args *AuthRPCArgs, reply *UptimeReply) error {
 		return errServerNotInitialized
 	}

-	// N B The uptime is computed assuming that the system time is
-	// monotonic. This is not the case in time pkg in Go, see
-	// https://github.com/golang/go/issues/12914. This is expected
-	// to be fixed by go1.9.
-	*reply = UptimeReply{
-		Uptime: time.Now().UTC().Sub(globalBootTime),
+	// Build storage info
+	objLayer := newObjectLayerFn()
+	if objLayer == nil {
+		return errServerNotInitialized
+	}
+	storageInfo := objLayer.StorageInfo()
+
+	var arns []string
+	for queueArn := range globalEventNotifier.GetAllExternalTargets() {
+		arns = append(arns, queueArn)
+	}
+
+	reply.ServerInfoData = ServerInfoData{
+		Properties: ServerProperties{
+			Uptime:   UTCNow().Sub(globalBootTime),
+			Version:  Version,
+			CommitID: CommitID,
+			Region:   serverConfig.GetRegion(),
+			SQSARN:   arns,
+		},
+		StorageInfo: storageInfo,
+		ConnStats:   globalConnStats.toServerConnStats(),
+		HTTPStats:   globalHTTPStats.toServerHTTPStats(),
 	}

 	return nil
@@ -18,9 +18,7 @@ package cmd

 import (
 	"encoding/json"
-	"net/url"
 	"testing"
-	"time"
 )

 func testAdminCmd(cmd cmdType, t *testing.T) {
@@ -40,7 +38,7 @@ func testAdminCmd(cmd cmdType, t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	reply := LoginRPCReply{}
 	err = adminServer.Login(&args, &reply)
@@ -87,9 +85,7 @@ func TestReInitDisks(t *testing.T) {
 	defer removeRoots(xlDirs)

 	// Set globalEndpoints for a single node XL setup.
-	for _, xlDir := range xlDirs {
-		globalEndpoints = append(globalEndpoints, &url.URL{Path: xlDir})
-	}
+	globalEndpoints = mustGetNewEndpointList(xlDirs...)

 	// Setup admin rpc server for an XL backend.
 	globalIsXL = true
@@ -99,7 +95,7 @@ func TestReInitDisks(t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	reply := LoginRPCReply{}
 	err = adminServer.Login(&args, &reply)
@@ -124,7 +120,7 @@ func TestReInitDisks(t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	fsReply := LoginRPCReply{}
 	err = fsAdminServer.Login(&fsArgs, &fsReply)
@@ -161,7 +157,7 @@ func TestGetConfig(t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	reply := LoginRPCReply{}
 	err = adminServer.Login(&args, &reply)
@@ -205,7 +201,7 @@ func TestWriteAndCommitConfig(t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	reply := LoginRPCReply{}
 	err = adminServer.Login(&args, &reply)
@@ -114,6 +114,7 @@ const (
 	ErrInvalidQueryParams
 	ErrBucketAlreadyOwnedByYou
 	ErrInvalidDuration
+	ErrNotSupported
 	// Add new error codes here.

 	// Bucket notification related errors.
@@ -148,6 +149,7 @@ const (
 	ErrAdminInvalidAccessKey
 	ErrAdminInvalidSecretKey
 	ErrAdminConfigNoQuorum
+	ErrInsecureClientRequest
 )

 // error code to APIError structure, these fields carry respective
@@ -229,7 +231,7 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		HTTPStatusCode: http.StatusInternalServerError,
 	},
 	ErrInvalidAccessKeyID: {
-		Code:           "InvalidAccessKeyID",
+		Code:           "InvalidAccessKeyId",
 		Description:    "The access key ID you provided does not exist in our records.",
 		HTTPStatusCode: http.StatusForbidden,
 	},
@@ -617,6 +619,11 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    "Configuration update failed because server quorum was not met",
 		HTTPStatusCode: http.StatusServiceUnavailable,
 	},
+	ErrInsecureClientRequest: {
+		Code:           "XMinioInsecureClientRequest",
+		Description:    "Cannot respond to plain-text request from TLS-encrypted server",
+		HTTPStatusCode: http.StatusBadRequest,
+	},

 	// Add your error structure here.
 }
@@ -666,6 +673,8 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 		apiErr = ErrInvalidBucketName
 	case BucketNotFound:
 		apiErr = ErrNoSuchBucket
+	case BucketAlreadyOwnedByYou:
+		apiErr = ErrBucketAlreadyOwnedByYou
 	case BucketNotEmpty:
 		apiErr = ErrBucketNotEmpty
 	case BucketExists:
@@ -698,8 +707,12 @@ func toAPIErrorCode(err error) (apiErr APIErrorCode) {
 		apiErr = ErrEntityTooLarge
 	case ObjectTooSmall:
 		apiErr = ErrEntityTooSmall
+	case NotSupported:
+		apiErr = ErrNotSupported
 	case NotImplemented:
 		apiErr = ErrNotImplemented
+	case PolicyNotFound:
+		apiErr = ErrNoSuchBucketPolicy
 	default:
 		apiErr = ErrInternalError
 	}
@@ -103,6 +103,10 @@ func TestAPIErrCode(t *testing.T) {
 			StorageFull{},
 			ErrStorageFull,
 		},
+		{
+			NotSupported{},
+			ErrNotSupported,
+		},
 		{
 			NotImplemented{},
 			ErrNotImplemented,
@@ -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.
@@ -34,8 +34,9 @@ func mustGetRequestID(t time.Time) string {
 // Write http common headers
 func setCommonHeaders(w http.ResponseWriter) {
 	// Set unique request ID for each reply.
-	w.Header().Set(responseRequestIDKey, mustGetRequestID(time.Now().UTC()))
+	w.Header().Set(responseRequestIDKey, mustGetRequestID(UTCNow()))
 	w.Header().Set("Server", globalServerUserAgent)
+	w.Header().Set("X-Amz-Bucket-Region", serverConfig.GetRegion())
 	w.Header().Set("Accept-Ranges", "bytes")
 }

@@ -61,8 +62,8 @@ func setObjectHeaders(w http.ResponseWriter, objInfo ObjectInfo, contentRange *h
 	w.Header().Set("Last-Modified", lastModified)

 	// Set Etag if available.
-	if objInfo.MD5Sum != "" {
-		w.Header().Set("ETag", "\""+objInfo.MD5Sum+"\"")
+	if objInfo.ETag != "" {
+		w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
 	}

 	// Set all other user defined metadata.
@@ -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.
@@ -18,12 +18,11 @@ package cmd

 import (
 	"testing"
-	"time"
 )

 func TestNewRequestID(t *testing.T) {
 	// Ensure that it returns an alphanumeric result of length 16.
-	var id = mustGetRequestID(time.Now().UTC())
+	var id = mustGetRequestID(UTCNow())

 	if len(id) != 16 {
 		t.Fail()
@@ -321,8 +321,8 @@ func generateListObjectsV1Response(bucket, prefix, marker, delimiter string, max
 		}
 		content.Key = object.Name
 		content.LastModified = object.ModTime.UTC().Format(timeFormatAMZLong)
-		if object.MD5Sum != "" {
-			content.ETag = "\"" + object.MD5Sum + "\""
+		if object.ETag != "" {
+			content.ETag = "\"" + object.ETag + "\""
 		}
 		content.Size = object.Size
 		content.StorageClass = globalMinioDefaultStorageClass
@@ -370,8 +370,8 @@ func generateListObjectsV2Response(bucket, prefix, token, startAfter, delimiter
 		}
 		content.Key = object.Name
 		content.LastModified = object.ModTime.UTC().Format(timeFormatAMZLong)
-		if object.MD5Sum != "" {
-			content.ETag = "\"" + object.MD5Sum + "\""
+		if object.ETag != "" {
+			content.ETag = "\"" + object.ETag + "\""
 		}
 		content.Size = object.Size
 		content.StorageClass = globalMinioDefaultStorageClass
@@ -64,7 +64,6 @@ func isRequestPostPolicySignatureV4(r *http.Request) bool {
 // 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.Header.Get("content-encoding") == streamingContentEncoding &&
 		r.Method == httpPUT
 }

@@ -114,13 +113,13 @@ func checkRequestAuthType(r *http.Request, bucket, policyAction, region string)
 		// Signature V2 validation.
 		s3Error := isReqAuthenticatedV2(r)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 		}
 		return s3Error
 	case authTypeSigned, authTypePresigned:
 		s3Error := isReqAuthenticated(r, region)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 		}
 		return s3Error
 	}
@@ -143,19 +142,16 @@ func isReqAuthenticatedV2(r *http.Request) (s3Error APIErrorCode) {
 	return doesPresignV2SignatureMatch(r)
 }

-func reqSignatureV4Verify(r *http.Request) (s3Error APIErrorCode) {
-	sha256sum := r.Header.Get("X-Amz-Content-Sha256")
-	// Skips calculating sha256 on the payload on server,
-	// if client requested for it.
-	if skipContentSha256Cksum(r) {
-		sha256sum = unsignedPayload
+func reqSignatureV4Verify(r *http.Request, region string) (s3Error APIErrorCode) {
+	sha256sum := getContentSha256Cksum(r)
+	switch {
+	case isRequestSignatureV4(r):
+		return doesSignatureMatch(sha256sum, r, region)
+	case isRequestPresignedSignatureV4(r):
+		return doesPresignedSignatureMatch(sha256sum, r, region)
+	default:
+		return ErrAccessDenied
 	}
-	if isRequestSignatureV4(r) {
-		return doesSignatureMatch(sha256sum, r, serverConfig.GetRegion())
-	} else if isRequestPresignedSignatureV4(r) {
-		return doesPresignedSignatureMatch(sha256sum, r, serverConfig.GetRegion())
-	}
-	return ErrAccessDenied
 }

 // Verify if request has valid AWS Signature Version '4'.
@@ -163,32 +159,39 @@ func isReqAuthenticated(r *http.Request, region string) (s3Error APIErrorCode) {
 	if r == nil {
 		return ErrInternalError
 	}
+	if errCode := reqSignatureV4Verify(r, region); errCode != ErrNone {
+		return errCode
+	}
 	payload, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		errorIf(err, "Unable to read request body for signature verification")
 		return ErrInternalError
 	}
+
+	// Populate back the payload.
+	r.Body = ioutil.NopCloser(bytes.NewReader(payload))
+
 	// Verify Content-Md5, if payload is set.
 	if r.Header.Get("Content-Md5") != "" {
 		if r.Header.Get("Content-Md5") != getMD5HashBase64(payload) {
 			return ErrBadDigest
 		}
 	}
-	// Populate back the payload.
-	r.Body = ioutil.NopCloser(bytes.NewReader(payload))
-	// Skips calculating sha256 on the payload on server, if client requested for it.
-	var sha256sum string
+
 	if skipContentSha256Cksum(r) {
-		sha256sum = unsignedPayload
-	} else {
-		sha256sum = getSHA256Hash(payload)
+		return ErrNone
 	}
-	if isRequestSignatureV4(r) {
-		return doesSignatureMatch(sha256sum, r, region)
-	} else if isRequestPresignedSignatureV4(r) {
-		return doesPresignedSignatureMatch(sha256sum, r, region)
+
+	// Verify that X-Amz-Content-Sha256 Header == sha256(payload)
+	// If X-Amz-Content-Sha256 header is not sent then we don't calculate/verify sha256(payload)
+	sum := r.Header.Get("X-Amz-Content-Sha256")
+	if isRequestPresignedSignatureV4(r) {
+		sum = r.URL.Query().Get("X-Amz-Content-Sha256")
 	}
-	return ErrAccessDenied
+	if sum != "" && sum != getSHA256Hash(payload) {
+		return ErrContentSHA256Mismatch
+	}
+	return ErrNone
 }

 // authHandler - handles all the incoming authorization headers and validates them if possible.
@@ -308,6 +308,16 @@ func mustNewSignedRequest(method string, urlStr string, contentLength int64, bod
 	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()
+	if err := signRequestV4(req, cred.AccessKey, cred.SecretKey); err != nil {
+		t.Fatalf("Unable to initialized new signed http request %s", err)
+	}
+	return req
+}
+
 // Tests is requested authenticated function, tests replies for s3 errors.
 func TestIsReqAuthenticated(t *testing.T) {
 	path, err := newTestConfig(globalMinioDefaultRegion)
@@ -333,16 +343,13 @@ func TestIsReqAuthenticated(t *testing.T) {
 		// When request is unsigned, access denied is returned.
 		{mustNewRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrAccessDenied},
 		// When request is properly signed, but has bad Content-MD5 header.
-		{mustNewSignedRequest("PUT", "http://127.0.0.1:9000", 5, bytes.NewReader([]byte("hello")), t), ErrBadDigest},
+		{mustNewSignedBadMD5Request("PUT", "http://127.0.0.1:9000/", 5, bytes.NewReader([]byte("hello")), t), ErrBadDigest},
 		// When request is properly signed, error is none.
 		{mustNewSignedRequest("GET", "http://127.0.0.1:9000", 0, nil, t), ErrNone},
 	}

 	// Validates all testcases.
 	for _, testCase := range testCases {
-		if testCase.s3Error == ErrBadDigest {
-			testCase.req.Header.Set("Content-Md5", "garbage")
-		}
 		if s3Error := isReqAuthenticated(testCase.req, serverConfig.GetRegion()); s3Error != testCase.s3Error {
 			t.Fatalf("Unexpected s3error returned wanted %d, got %d", testCase.s3Error, s3Error)
 		}
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -52,10 +52,10 @@ type authConfig struct {

 // AuthRPCClient is a authenticated RPC client which does authentication before doing Call().
 type AuthRPCClient struct {
-	sync.Mutex            // 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    *RPCClient // Reconnectable RPC client to make any RPC call.
+	config       authConfig // Authentication configuration information.
+	authToken    string     // Authentication token.
 }

 // newAuthRPCClient - returns a JWT based authenticated (go) rpc client, which does automatic reconnect.
@@ -78,33 +78,43 @@ func newAuthRPCClient(config authConfig) *AuthRPCClient {
 	}
 }

-// Login - a jwt based authentication is performed with rpc server.
+// Login a JWT based authentication is performed with rpc server.
 func (authClient *AuthRPCClient) Login() (err error) {
+	// Login should be attempted one at a time.
+	//
+	// The reason for large region lock here is
+	// to avoid two simultaneous login attempts
+	// racing over each other.
+	//
+	// #1 Login() gets the lock proceeds to login.
+	// #2 Login() waits for the unlock to happen
+	//    after login in #1.
+	// #1 Successfully completes login saves the
+	//    newly acquired token.
+	// #2 Successfully gets the lock and proceeds,
+	//    but since we have acquired the token
+	//    already the call quickly returns.
 	authClient.Lock()
 	defer authClient.Unlock()

-	// Return if already logged in.
-	if authClient.authToken != "" {
-		return nil
+	// Attempt to login if not logged in already.
+	if authClient.authToken == "" {
+		// Login to authenticate and acquire a new auth token.
+		var (
+			loginMethod = authClient.config.serviceName + loginMethodName
+			loginArgs   = LoginRPCArgs{
+				Username:    authClient.config.accessKey,
+				Password:    authClient.config.secretKey,
+				Version:     Version,
+				RequestTime: UTCNow(),
+			}
+			loginReply = LoginRPCReply{}
+		)
+		if err = authClient.rpcClient.Call(loginMethod, &loginArgs, &loginReply); err != nil {
+			return err
+		}
+		authClient.authToken = loginReply.AuthToken
 	}
-
-	// Call login.
-	args := LoginRPCArgs{
-		Username:    authClient.config.accessKey,
-		Password:    authClient.config.secretKey,
-		Version:     Version,
-		RequestTime: time.Now().UTC(),
-	}
-
-	reply := LoginRPCReply{}
-	serviceMethod := authClient.config.serviceName + loginMethodName
-	if err = authClient.rpcClient.Call(serviceMethod, &args, &reply); err != nil {
-		return err
-	}
-
-	// Logged in successfully.
-	authClient.authToken = reply.AuthToken
-
 	return nil
 }

@@ -112,17 +122,17 @@ func (authClient *AuthRPCClient) Login() (err error) {
 func (authClient *AuthRPCClient) call(serviceMethod string, args interface {
 	SetAuthToken(authToken string)
 }, reply interface{}) (err error) {
-	// On successful login, execute RPC call.
-	if err = authClient.Login(); err == nil {
-		authClient.Lock()
-		// Set token and timestamp before the rpc call.
-		args.SetAuthToken(authClient.authToken)
-		authClient.Unlock()
+	if err = authClient.Login(); err != nil {
+		return err
+	} // On successful login, execute RPC call.

-		// Do RPC call.
-		err = authClient.rpcClient.Call(serviceMethod, args, reply)
-	}
-	return err
+	authClient.RLock()
+	// Set token before the rpc call.
+	args.SetAuthToken(authClient.authToken)
+	authClient.RUnlock()
+
+	// Do an RPC call.
+	return authClient.rpcClient.Call(serviceMethod, args, reply)
 }

 // Call executes RPC call till success or globalAuthRPCRetryThreshold on ErrShutdown.
@@ -23,7 +23,6 @@ import (
 	"math/rand"
 	"strconv"
 	"testing"
-	"time"

 	humanize "github.com/dustin/go-humanize"
 )
@@ -40,7 +39,7 @@ func runPutObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucket(bucket)
+	err = obj.MakeBucketWithLocation(bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -50,7 +49,7 @@ func runPutObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	// generate md5sum for the generated data.
 	// md5sum of the data to written is required as input for PutObject.
 	metadata := make(map[string]string)
-	metadata["md5Sum"] = getMD5Hash(textData)
+	metadata["etag"] = getMD5Hash(textData)
 	sha256sum := ""
 	// benchmark utility which helps obtain number of allocations and bytes allocated per ops.
 	b.ReportAllocs()
@@ -62,8 +61,8 @@ func runPutObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 		if err != nil {
 			b.Fatal(err)
 		}
-		if objInfo.MD5Sum != metadata["md5Sum"] {
-			b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, objInfo.MD5Sum, metadata["md5Sum"])
+		if objInfo.ETag != metadata["etag"] {
+			b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, objInfo.ETag, metadata["etag"])
 		}
 	}
 	// Benchmark ends here. Stop timer.
@@ -79,22 +78,22 @@ func runPutObjectPartBenchmark(b *testing.B, obj ObjectLayer, partSize int) {
 	object := getRandomObjectName()

 	// create bucket.
-	err = obj.MakeBucket(bucket)
+	err = obj.MakeBucketWithLocation(bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}

 	objSize := 128 * humanize.MiByte

-	// PutObjectPart returns md5Sum of the object inserted.
-	// md5Sum variable is assigned with that value.
-	var md5Sum, uploadID string
+	// PutObjectPart returns etag of the object inserted.
+	// etag variable is assigned with that value.
+	var etag, uploadID string
 	// get text data generated for number of bytes equal to object size.
 	textData := generateBytesData(objSize)
 	// generate md5sum for the generated data.
 	// md5sum of the data to written is required as input for NewMultipartUpload.
 	metadata := make(map[string]string)
-	metadata["md5Sum"] = getMD5Hash(textData)
+	metadata["etag"] = getMD5Hash(textData)
 	sha256sum := ""
 	uploadID, err = obj.NewMultipartUpload(bucket, object, metadata)
 	if err != nil {
@@ -116,14 +115,14 @@ func runPutObjectPartBenchmark(b *testing.B, obj ObjectLayer, partSize int) {
 				textPartData = textData[j*partSize:]
 			}
 			metadata := make(map[string]string)
-			metadata["md5Sum"] = getMD5Hash([]byte(textPartData))
+			metadata["etag"] = getMD5Hash([]byte(textPartData))
 			var partInfo PartInfo
-			partInfo, err = obj.PutObjectPart(bucket, object, uploadID, j, int64(len(textPartData)), bytes.NewBuffer(textPartData), metadata["md5Sum"], sha256sum)
+			partInfo, err = obj.PutObjectPart(bucket, object, uploadID, j, int64(len(textPartData)), bytes.NewBuffer(textPartData), metadata["etag"], sha256sum)
 			if err != nil {
 				b.Fatal(err)
 			}
-			if partInfo.ETag != metadata["md5Sum"] {
-				b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, md5Sum, metadata["md5Sum"])
+			if partInfo.ETag != metadata["etag"] {
+				b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, etag, metadata["etag"])
 			}
 		}
 	}
@@ -200,7 +199,7 @@ func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucket(bucket)
+	err = obj.MakeBucketWithLocation(bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -209,19 +208,19 @@ func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 	for i := 0; i < 10; i++ {
 		// get text data generated for number of bytes equal to object size.
 		textData := generateBytesData(objSize)
-		// generate md5sum for the generated data.
-		// md5sum of the data to written is required as input for PutObject.
+		// generate etag for the generated data.
+		// etag of the data to written is required as input for PutObject.
 		// PutObject is the functions which writes the data onto the FS/XL backend.
 		metadata := make(map[string]string)
-		metadata["md5Sum"] = getMD5Hash(textData)
+		metadata["etag"] = getMD5Hash(textData)
 		// insert the object.
 		var objInfo ObjectInfo
 		objInfo, err = obj.PutObject(bucket, "object"+strconv.Itoa(i), int64(len(textData)), bytes.NewBuffer(textData), metadata, sha256sum)
 		if err != nil {
 			b.Fatal(err)
 		}
-		if objInfo.MD5Sum != metadata["md5Sum"] {
-			b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, objInfo.MD5Sum, metadata["md5Sum"])
+		if objInfo.ETag != metadata["etag"] {
+			b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, objInfo.ETag, metadata["etag"])
 		}
 	}

@@ -245,7 +244,7 @@ func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
 func getRandomByte() []byte {
 	const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 	// seeding the random number generator.
-	rand.Seed(time.Now().UTC().UnixNano())
+	rand.Seed(UTCNow().UnixNano())
 	var b byte
 	// pick a character randomly.
 	b = letterBytes[rand.Intn(len(letterBytes))]
@@ -308,7 +307,7 @@ func runPutObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucket(bucket)
+	err = obj.MakeBucketWithLocation(bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -318,7 +317,7 @@ func runPutObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 	// generate md5sum for the generated data.
 	// md5sum of the data to written is required as input for PutObject.
 	metadata := make(map[string]string)
-	metadata["md5Sum"] = getMD5Hash([]byte(textData))
+	metadata["etag"] = getMD5Hash([]byte(textData))
 	sha256sum := ""
 	// benchmark utility which helps obtain number of allocations and bytes allocated per ops.
 	b.ReportAllocs()
@@ -333,8 +332,8 @@ func runPutObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 			if err != nil {
 				b.Fatal(err)
 			}
-			if objInfo.MD5Sum != metadata["md5Sum"] {
-				b.Fatalf("Write no: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", objInfo.MD5Sum, metadata["md5Sum"])
+			if objInfo.ETag != metadata["etag"] {
+				b.Fatalf("Write no: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", objInfo.ETag, metadata["etag"])
 			}
 			i++
 		}
@@ -356,7 +355,7 @@ func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 	// obtains random bucket name.
 	bucket := getRandomBucketName()
 	// create bucket.
-	err = obj.MakeBucket(bucket)
+	err = obj.MakeBucketWithLocation(bucket, "")
 	if err != nil {
 		b.Fatal(err)
 	}
@@ -368,7 +367,7 @@ func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 		// md5sum of the data to written is required as input for PutObject.
 		// PutObject is the functions which writes the data onto the FS/XL backend.
 		metadata := make(map[string]string)
-		metadata["md5Sum"] = getMD5Hash([]byte(textData))
+		metadata["etag"] = getMD5Hash([]byte(textData))
 		sha256sum := ""
 		// insert the object.
 		var objInfo ObjectInfo
@@ -376,8 +375,8 @@ func runGetObjectBenchmarkParallel(b *testing.B, obj ObjectLayer, objSize int) {
 		if err != nil {
 			b.Fatal(err)
 		}
-		if objInfo.MD5Sum != metadata["md5Sum"] {
-			b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, objInfo.MD5Sum, metadata["md5Sum"])
+		if objInfo.ETag != metadata["etag"] {
+			b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, objInfo.ETag, metadata["etag"])
 		}
 	}

@@ -0,0 +1,68 @@
+/*
+ * 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"
+)
+
+// BrowserFlag - wrapper bool type.
+type BrowserFlag bool
+
+// String - returns string of BrowserFlag.
+func (bf BrowserFlag) String() string {
+	if bf {
+		return "on"
+	}
+
+	return "off"
+}
+
+// MarshalJSON - converts BrowserFlag into JSON data.
+func (bf BrowserFlag) MarshalJSON() ([]byte, error) {
+	return json.Marshal(bf.String())
+}
+
+// UnmarshalJSON - parses given data into BrowserFlag.
+func (bf *BrowserFlag) UnmarshalJSON(data []byte) (err error) {
+	var s string
+	if err = json.Unmarshal(data, &s); err == nil {
+		b := BrowserFlag(true)
+		if s == "" {
+			// Empty string is treated as valid.
+			*bf = b
+		} else if b, err = ParseBrowserFlag(s); err == nil {
+			*bf = b
+		}
+	}
+
+	return err
+}
+
+// ParseBrowserFlag - parses string into BrowserFlag.
+func ParseBrowserFlag(s string) (bf BrowserFlag, err error) {
+	if s == "on" {
+		bf = true
+	} else if s == "off" {
+		bf = false
+	} else {
+		err = fmt.Errorf("invalid value ‘%s’ for BrowserFlag", s)
+	}
+
+	return bf, err
+}
@@ -0,0 +1,137 @@
+/*
+ * 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 (
+	"errors"
+	"testing"
+)
+
+// Test BrowserFlag.String()
+func TestBrowserFlagString(t *testing.T) {
+	var bf BrowserFlag
+
+	testCases := []struct {
+		flag           BrowserFlag
+		expectedResult string
+	}{
+		{bf, "off"},
+		{BrowserFlag(true), "on"},
+		{BrowserFlag(false), "off"},
+	}
+
+	for _, testCase := range testCases {
+		str := testCase.flag.String()
+		if testCase.expectedResult != str {
+			t.Fatalf("expected: %v, got: %v", testCase.expectedResult, str)
+		}
+	}
+}
+
+// Test BrowserFlag.MarshalJSON()
+func TestBrowserFlagMarshalJSON(t *testing.T) {
+	var bf BrowserFlag
+
+	testCases := []struct {
+		flag           BrowserFlag
+		expectedResult string
+	}{
+		{bf, `"off"`},
+		{BrowserFlag(true), `"on"`},
+		{BrowserFlag(false), `"off"`},
+	}
+
+	for _, testCase := range testCases {
+		data, _ := testCase.flag.MarshalJSON()
+		if testCase.expectedResult != string(data) {
+			t.Fatalf("expected: %v, got: %v", testCase.expectedResult, string(data))
+		}
+	}
+}
+
+// Test BrowserFlag.UnmarshalJSON()
+func TestBrowserFlagUnmarshalJSON(t *testing.T) {
+	testCases := []struct {
+		data           []byte
+		expectedResult BrowserFlag
+		expectedErr    error
+	}{
+		{[]byte(`{}`), BrowserFlag(false), errors.New("json: cannot unmarshal object into Go value of type string")},
+		{[]byte(`["on"]`), BrowserFlag(false), errors.New("json: cannot unmarshal array into Go value of type string")},
+		{[]byte(`"junk"`), BrowserFlag(false), errors.New("invalid value ‘junk’ for BrowserFlag")},
+		{[]byte(`"true"`), BrowserFlag(false), errors.New("invalid value ‘true’ for BrowserFlag")},
+		{[]byte(`"false"`), BrowserFlag(false), errors.New("invalid value ‘false’ for BrowserFlag")},
+		{[]byte(`"ON"`), BrowserFlag(false), errors.New("invalid value ‘ON’ for BrowserFlag")},
+		{[]byte(`"OFF"`), BrowserFlag(false), errors.New("invalid value ‘OFF’ for BrowserFlag")},
+		{[]byte(`""`), BrowserFlag(true), nil},
+		{[]byte(`"on"`), BrowserFlag(true), nil},
+		{[]byte(`"off"`), BrowserFlag(false), nil},
+	}
+
+	for _, testCase := range testCases {
+		var flag BrowserFlag
+		err := (&flag).UnmarshalJSON(testCase.data)
+		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 err == nil && testCase.expectedResult != flag {
+			t.Fatalf("result: expected: %v, got: %v", testCase.expectedResult, flag)
+		}
+	}
+}
+
+// Test ParseBrowserFlag()
+func TestParseBrowserFlag(t *testing.T) {
+	testCases := []struct {
+		flagStr        string
+		expectedResult BrowserFlag
+		expectedErr    error
+	}{
+		{"", BrowserFlag(false), errors.New("invalid value ‘’ for BrowserFlag")},
+		{"junk", BrowserFlag(false), errors.New("invalid value ‘junk’ for BrowserFlag")},
+		{"true", BrowserFlag(false), errors.New("invalid value ‘true’ for BrowserFlag")},
+		{"false", BrowserFlag(false), errors.New("invalid value ‘false’ for BrowserFlag")},
+		{"ON", BrowserFlag(false), errors.New("invalid value ‘ON’ for BrowserFlag")},
+		{"OFF", BrowserFlag(false), errors.New("invalid value ‘OFF’ for BrowserFlag")},
+		{"on", BrowserFlag(true), nil},
+		{"off", BrowserFlag(false), nil},
+	}
+
+	for _, testCase := range testCases {
+		bf, err := ParseBrowserFlag(testCase.flagStr)
+		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 err == nil && testCase.expectedResult != bf {
+			t.Fatalf("result: expected: %v, got: %v", testCase.expectedResult, bf)
+		}
+	}
+}
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -19,7 +19,6 @@ package cmd
 import (
 	"path"
 	"testing"
-	"time"
 )

 // API suite container common to both FS and XL.
@@ -96,7 +95,7 @@ func (s *TestRPCBrowserPeerSuite) testBrowserPeerRPC(t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	rreply := &LoginRPCReply{}
 	err = rclient.Call("BrowserPeer"+loginMethodName, rargs, rreply)
@@ -111,7 +110,7 @@ func (s *TestRPCBrowserPeerSuite) testBrowserPeerRPC(t *testing.T) {
 		Username:    creds.AccessKey,
 		Password:    creds.SecretKey,
 		Version:     Version,
-		RequestTime: time.Now().UTC(),
+		RequestTime: UTCNow(),
 	}
 	rreply = &LoginRPCReply{}
 	err = rclient.Call("BrowserPeer"+loginMethodName, rargs, rreply)
@@ -20,6 +20,7 @@ import (
 	"encoding/base64"
 	"encoding/xml"
 	"io"
+	"net"
 	"net/http"
 	"net/url"
 	"path"
@@ -82,6 +83,10 @@ func enforceBucketPolicy(bucket, action, resource, referer string, queryParams u

 // Check if the action is allowed on the bucket/prefix.
 func isBucketActionAllowed(action, bucket, prefix string) bool {
+	if globalBucketPolicies == nil {
+		return false
+	}
+
 	policy := globalBucketPolicies.GetBucketPolicy(bucket)
 	if policy == nil {
 		return false
@@ -322,6 +327,13 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 	// Write success response.
 	writeSuccessResponseXML(w, encodedSuccessResponse)

+	// Get host and port from Request.RemoteAddr failing which
+	// fill them with empty strings.
+	host, port, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		host, port = "", ""
+	}
+
 	// Notify deleted event for objects.
 	for _, dobj := range deletedObjects {
 		eventNotify(eventData{
@@ -331,6 +343,9 @@ func (api objectAPIHandlers) DeleteMultipleObjectsHandler(w http.ResponseWriter,
 				Name: dobj.ObjectName,
 			},
 			ReqParams: extractReqParams(r),
+			UserAgent: r.UserAgent(),
+			Host:      host,
+			Port:      port,
 		})
 	}
 }
@@ -359,19 +374,26 @@ func (api objectAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Req
 	vars := mux.Vars(r)
 	bucket := vars["bucket"]

-	// Validate if incoming location constraint is valid, reject
-	// requests which do not follow valid region requirements.
-	if s3Error := isValidLocationConstraint(r); s3Error != ErrNone {
+	// Parse incoming location constraint.
+	location, s3Error := parseLocationConstraint(r)
+	if s3Error != ErrNone {
 		writeErrorResponse(w, s3Error, r.URL)
 		return
 	}

+	// Validate if location sent by the client is valid, reject
+	// requests which do not follow valid region requirements.
+	if !isValidLocation(location) {
+		writeErrorResponse(w, ErrInvalidRegion, r.URL)
+		return
+	}
+
 	bucketLock := globalNSMutex.NewNSLock(bucket, "")
 	bucketLock.Lock()
 	defer bucketLock.Unlock()

 	// Proceed to creating a bucket.
-	err := objectAPI.MakeBucket(bucket)
+	err := objectAPI.MakeBucketWithLocation(bucket, "")
 	if err != nil {
 		errorIf(err, "Unable to create a bucket.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
@@ -517,15 +539,24 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		return
 	}

-	w.Header().Set("ETag", `"`+objInfo.MD5Sum+`"`)
+	w.Header().Set("ETag", `"`+objInfo.ETag+`"`)
 	w.Header().Set("Location", getObjectLocation(bucket, object))

+	// Get host and port from Request.RemoteAddr.
+	host, port, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		host, port = "", ""
+	}
+
 	// Notify object created event.
 	defer eventNotify(eventData{
 		Type:      ObjectCreatedPost,
 		Bucket:    objInfo.Bucket,
 		ObjInfo:   objInfo,
 		ReqParams: extractReqParams(r),
+		UserAgent: r.UserAgent(),
+		Host:      host,
+		Port:      port,
 	})

 	if successRedirect != "" {
@@ -541,7 +572,7 @@ func (api objectAPIHandlers) PostPolicyBucketHandler(w http.ResponseWriter, r *h
 		resp := encodeResponse(PostResponse{
 			Bucket:   objInfo.Bucket,
 			Key:      objInfo.Name,
-			ETag:     `"` + objInfo.MD5Sum + `"`,
+			ETag:     `"` + objInfo.ETag + `"`,
 			Location: getObjectLocation(objInfo.Bucket, objInfo.Name),
 		})
 		writeResponse(w, http.StatusCreated, resp, "application/xml")
@@ -68,7 +68,7 @@ func testGetBucketLocationHandler(obj ObjectLayer, instanceType, bucketName stri
 			locationResponse:   []byte(""),
 			errorResponse: APIErrorResponse{
 				Resource: "/" + bucketName + "/",
-				Code:     "InvalidAccessKeyID",
+				Code:     "InvalidAccessKeyId",
 				Message:  "The access key ID you provided does not exist in our records.",
 			},
 			shouldPass: false,
@@ -771,3 +771,36 @@ func testAPIDeleteMultipleObjectsHandler(obj ObjectLayer, instanceType, bucketNa
 	// `ExecObjectLayerAPINilTest` manages the operation.
 	ExecObjectLayerAPINilTest(t, nilBucket, nilObject, instanceType, apiRouter, nilReq)
 }
+
+func TestIsBucketActionAllowed(t *testing.T) {
+	ExecObjectLayerAPITest(t, testIsBucketActionAllowedHandler, []string{"BucketLocation"})
+}
+
+func testIsBucketActionAllowedHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
+	credentials credential, t *testing.T) {
+
+	testCases := []struct {
+		// input.
+		action              string
+		bucket              string
+		prefix              string
+		isGlobalPoliciesNil bool
+		// flag indicating whether the test should pass.
+		shouldPass bool
+	}{
+		{"s3:GetBucketLocation", "mybucket", "abc", true, false},
+		{"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)
+		if isAllowed != testCase.shouldPass {
+			t.Errorf("Case %d: Expected the response status to be `%t`, but instead found `%t`", i+1, testCase.shouldPass, isAllowed)
+		}
+
+	}
+}
@@ -94,6 +94,10 @@ const (
 	ObjectCreatedCompleteMultipartUpload
 	// ObjectRemovedDelete is s3:ObjectRemoved:Delete
 	ObjectRemovedDelete
+	// ObjectAccessedGet is s3:ObjectAccessed:Get
+	ObjectAccessedGet
+	// ObjectAccessedHead is s3:ObjectAccessed:Head
+	ObjectAccessedHead
 )

 // Stringer interface for event name.
@@ -109,6 +113,10 @@ func (eventName EventName) String() string {
 		return "s3:ObjectCreated:CompleteMultipartUpload"
 	case ObjectRemovedDelete:
 		return "s3:ObjectRemoved:Delete"
+	case ObjectAccessedGet:
+		return "s3:ObjectAccessed:Get"
+	case ObjectAccessedHead:
+		return "s3:ObjectAccessed:Head"
 	default:
 		return "s3:Unknown"
 	}
@@ -128,11 +136,13 @@ type bucketMeta struct {

 // Notification event object metadata.
 type objectMeta struct {
-	Key       string `json:"key"`
-	Size      int64  `json:"size,omitempty"`
-	ETag      string `json:"eTag,omitempty"`
-	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"`
+	UserDefined map[string]string `json:"userDefined,omitempty"`
+	VersionID   string            `json:"versionId,omitempty"`
+	Sequencer   string            `json:"sequencer"`
 }

 const (
@@ -168,6 +178,14 @@ const (
 	eventVersion = "2.0"
 )

+// sourceInfo represents information on the client that triggered the
+// event notification.
+type sourceInfo struct {
+	Host      string `json:"host"`
+	Port      string `json:"port"`
+	UserAgent string `json:"userAgent"`
+}
+
 // NotificationEvent represents an Amazon an S3 bucket notification event.
 type NotificationEvent struct {
 	EventVersion      string            `json:"eventVersion"`
@@ -179,6 +197,7 @@ type NotificationEvent struct {
 	RequestParameters map[string]string `json:"requestParameters"`
 	ResponseElements  map[string]string `json:"responseElements"`
 	S3                eventMeta         `json:"s3"`
+	Source            sourceInfo        `json:"source"`
 }

 // Represents the minio sqs type and account id's.
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -285,7 +285,7 @@ func (api objectAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWrit
 		return
 	}

-	accountID := fmt.Sprintf("%d", time.Now().UTC().UnixNano())
+	accountID := fmt.Sprintf("%d", UTCNow().UnixNano())
 	accountARN := fmt.Sprintf(
 		"%s:%s:%s:%s-%s",
 		minioTopic,
@@ -268,6 +268,7 @@ func testListenBucketNotificationNilHandler(obj ObjectLayer, instanceType, bucke
 			[]string{"*.jpg"}, []string{
 				"s3:ObjectCreated:*",
 				"s3:ObjectRemoved:*",
+				"s3:ObjectAccessed:*",
 			}), 0, nil, credentials.AccessKey, credentials.SecretKey)
 	if tErr != nil {
 		t.Fatalf("%s: Failed to create HTTP testRequest for ListenBucketNotification: <ERROR> %v", instanceType, tErr)
@@ -16,7 +16,12 @@

 package cmd

-import "strings"
+import (
+	"errors"
+	"strings"
+
+	"github.com/minio/minio-go/pkg/set"
+)

 // List of valid event types.
 var suppportedEventTypes = map[string]struct{}{
@@ -29,6 +34,9 @@ var suppportedEventTypes = map[string]struct{}{
 	// Object removed event types.
 	"s3:ObjectRemoved:*":      {},
 	"s3:ObjectRemoved:Delete": {},
+	"s3:ObjectAccessed:Get":   {},
+	"s3:ObjectAccessed:Head":  {},
+	"s3:ObjectAccessed:*":     {},
 }

 // checkEvent - checks if an event is supported.
@@ -104,20 +112,21 @@ func checkARN(arn, arnType string) APIErrorCode {
 	if !strings.HasPrefix(arn, arnType) {
 		return ErrARNNotification
 	}
-	if !strings.HasPrefix(arn, arnType+serverConfig.GetRegion()+":") {
-		return ErrRegionNotification
-	}
-	account := strings.SplitN(strings.TrimPrefix(arn, arnType+serverConfig.GetRegion()+":"), ":", 2)
-	switch len(account) {
-	case 1:
-		// This means ARN is malformed, account should have min of 2elements.
+	strs := strings.SplitN(arn, ":", -1)
+	if len(strs) != 6 {
 		return ErrARNNotification
-	case 2:
-		// Account topic id or topic name cannot be empty.
-		if account[0] == "" || account[1] == "" {
-			return ErrARNNotification
+	}
+	if serverConfig.GetRegion() != "" {
+		region := strs[3]
+		if region != serverConfig.GetRegion() {
+			return ErrRegionNotification
 		}
 	}
+	accountID := strs[4]
+	resource := strs[5]
+	if accountID == "" || resource == "" {
+		return ErrARNNotification
+	}
 	return ErrNone
 }

@@ -148,6 +157,10 @@ func isValidQueueID(queueARN string) bool {
 		pgN := serverConfig.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)
+		// Mysql can work with only default conn. info.
+		return msqlN.Enable
 	} else if isKafkaQueue(sqsARN) {
 		kafkaN := serverConfig.Notify.GetKafkaByID(sqsARN.AccountID)
 		return (kafkaN.Enable && len(kafkaN.Brokers) > 0 &&
@@ -200,16 +213,14 @@ func validateQueueConfigs(queueConfigs []queueConfig) APIErrorCode {

 // Check all the queue configs for any duplicates.
 func checkDuplicateQueueConfigs(configs []queueConfig) APIErrorCode {
-	var queueConfigARNS []string
+	queueConfigARNS := set.NewStringSet()

 	// Navigate through each configs and count the entries.
 	for _, config := range configs {
-		queueConfigARNS = append(queueConfigARNS, config.QueueARN)
+		queueConfigARNS.Add(config.QueueARN)
 	}

-	// Check if there are any duplicate counts.
-	if err := checkDuplicateStrings(queueConfigARNS); err != nil {
-		errorIf(err, "Invalid queue configs found.")
+	if len(queueConfigARNS) != len(configs) {
 		return ErrOverlappingConfigs
 	}

@@ -244,30 +255,43 @@ func validateNotificationConfig(nConfig notificationConfig) APIErrorCode {
 // - elasticsearch
 // - redis
 // - postgresql
+// - mysql
 // - kafka
 // - webhook
 func unmarshalSqsARN(queueARN string) (mSqs arnSQS) {
-	mSqs = arnSQS{}
-	if !strings.HasPrefix(queueARN, minioSqs+serverConfig.GetRegion()+":") {
-		return mSqs
+	strs := strings.SplitN(queueARN, ":", -1)
+	if len(strs) != 6 {
+		return
 	}
-	sqsType := strings.TrimPrefix(queueARN, minioSqs+serverConfig.GetRegion()+":")
-	switch {
-	case hasSuffix(sqsType, queueTypeAMQP):
+	if serverConfig.GetRegion() != "" {
+		region := strs[3]
+		if region != serverConfig.GetRegion() {
+			return
+		}
+	}
+	sqsType := strs[5]
+	switch sqsType {
+	case queueTypeAMQP:
 		mSqs.Type = queueTypeAMQP
-	case hasSuffix(sqsType, queueTypeNATS):
+	case queueTypeNATS:
 		mSqs.Type = queueTypeNATS
-	case hasSuffix(sqsType, queueTypeElastic):
+	case queueTypeElastic:
 		mSqs.Type = queueTypeElastic
-	case hasSuffix(sqsType, queueTypeRedis):
+	case queueTypeRedis:
 		mSqs.Type = queueTypeRedis
-	case hasSuffix(sqsType, queueTypePostgreSQL):
+	case queueTypePostgreSQL:
 		mSqs.Type = queueTypePostgreSQL
-	case hasSuffix(sqsType, queueTypeKafka):
+	case queueTypeMySQL:
+		mSqs.Type = queueTypeMySQL
+	case queueTypeKafka:
 		mSqs.Type = queueTypeKafka
-	case hasSuffix(sqsType, queueTypeWebhook):
+	case queueTypeWebhook:
 		mSqs.Type = queueTypeWebhook
+	default:
+		errorIf(errors.New("invalid SQS type"), "SQS type: %s", sqsType)
 	} // Add more queues here.
-	mSqs.AccountID = strings.TrimSuffix(sqsType, ":"+mSqs.Type)
-	return mSqs
+
+	mSqs.AccountID = strs[4]
+
+	return
 }
@@ -259,11 +259,6 @@ func TestQueueARN(t *testing.T) {
 			queueARN: "arn:minio:sns:us-east-1:1:listen",
 			errCode:  ErrARNNotification,
 		},
-		// Invalid region 'us-west-1' in queue arn.
-		{
-			queueARN: "arn:minio:sqs:us-west-1:1:redis",
-			errCode:  ErrRegionNotification,
-		},
 		// Invalid queue name empty in queue arn.
 		{
 			queueARN: "arn:minio:sqs:us-east-1:1:",
@@ -298,6 +293,37 @@ func TestQueueARN(t *testing.T) {
 			t.Errorf("Test %d: Expected \"%d\", got \"%d\"", i+1, testCase.errCode, errCode)
 		}
 	}
+
+	// Test when server region is set.
+	rootPath, err = newTestConfig("us-east-1")
+	if err != nil {
+		t.Fatalf("unable initialize config file, %s", err)
+	}
+	defer removeAll(rootPath)
+
+	testCases = []struct {
+		queueARN string
+		errCode  APIErrorCode
+	}{
+		// Incorrect region should produce error.
+		{
+			queueARN: "arn:minio:sqs:us-west-1:1:webhook",
+			errCode:  ErrRegionNotification,
+		},
+		// Correct region should not produce error.
+		{
+			queueARN: "arn:minio:sqs:us-east-1:1:webhook",
+			errCode:  ErrNone,
+		},
+	}
+
+	// Validate all tests for queue arn.
+	for i, testCase := range testCases {
+		errCode := checkQueueARN(testCase.queueARN)
+		if testCase.errCode != errCode {
+			t.Errorf("Test %d: Expected \"%d\", got \"%d\"", i+1, testCase.errCode, errCode)
+		}
+	}
 }

 // Test unmarshal queue arn.
@@ -337,11 +363,6 @@ func TestUnmarshalSQSARN(t *testing.T) {
 			queueARN: "",
 			Type:     "",
 		},
-		// Invalid region 'us-west-1' in queue arn.
-		{
-			queueARN: "arn:minio:sqs:us-west-1:1:redis",
-			Type:     "",
-		},
 		// Partial queue arn.
 		{
 			queueARN: "arn:minio:sqs:",
@@ -361,4 +382,33 @@ func TestUnmarshalSQSARN(t *testing.T) {
 		}
 	}

+	// Test when the server region is set.
+	rootPath, err = newTestConfig("us-east-1")
+	if err != nil {
+		t.Fatalf("unable initialize config file, %s", err)
+	}
+	defer removeAll(rootPath)
+
+	testCases = []struct {
+		queueARN string
+		Type     string
+	}{
+		// Incorrect region in ARN returns empty mSqs.Type
+		{
+			queueARN: "arn:minio:sqs:us-west-1:1:webhook",
+			Type:     "",
+		},
+		// Correct regionin ARN returns valid mSqs.Type
+		{
+			queueARN: "arn:minio:sqs:us-east-1:1:webhook",
+			Type:     "webhook",
+		},
+	}
+
+	for i, testCase := range testCases {
+		mSqs := unmarshalSqsARN(testCase.queueARN)
+		if testCase.Type != mSqs.Type {
+			t.Errorf("Test %d: Expected \"%s\", got \"%s\"", i+1, testCase.Type, mSqs.Type)
+		}
+	}
 }
@@ -251,7 +251,7 @@ func testPutBucketPolicyHandler(obj ObjectLayer, instanceType, bucketName string
 	initBucketPolicies(obj)

 	bucketName1 := fmt.Sprintf("%s-1", bucketName)
-	if err := obj.MakeBucket(bucketName1); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName1, ""); err != nil {
 		t.Fatal(err)
 	}

@@ -24,11 +24,6 @@ import (
 	"path/filepath"
 )

-// isSSL - returns true with both cert and key exists.
-func isSSL() bool {
-	return isFile(getPublicCertFile()) && isFile(getPrivateKeyFile())
-}
-
 func parsePublicCertFile(certFile string) (certs []*x509.Certificate, err error) {
 	var bytes []byte

@@ -60,11 +55,6 @@ func parsePublicCertFile(certFile string) (certs []*x509.Certificate, err error)
 	return certs, err
 }

-// Reads certificate file and returns a list of parsed certificates.
-func readCertificateChain() ([]*x509.Certificate, error) {
-	return parsePublicCertFile(getPublicCertFile())
-}
-
 func getRootCAs(certsCAsDir string) (*x509.CertPool, error) {
 	// Get all CA file names.
 	var caFiles []string
@@ -100,9 +90,19 @@ func getRootCAs(certsCAsDir string) (*x509.CertPool, error) {
 	return rootCAs, nil
 }

-// loadRootCAs fetches CA files provided in minio config and adds them to globalRootCAs
-// Currently under Windows, there is no way to load system + user CAs at the same time
-func loadRootCAs() (err error) {
-	globalRootCAs, err = getRootCAs(getCADir())
-	return err
+func getSSLConfig() (publicCerts []*x509.Certificate, rootCAs *x509.CertPool, secureConn bool, err error) {
+	if !(isFile(getPublicCertFile()) && isFile(getPrivateKeyFile())) {
+		return publicCerts, rootCAs, secureConn, err
+	}
+
+	if publicCerts, err = parsePublicCertFile(getPublicCertFile()); err != nil {
+		return publicCerts, rootCAs, secureConn, err
+	}
+
+	if rootCAs, err = getRootCAs(getCADir()); err != nil {
+		return publicCerts, rootCAs, secureConn, err
+	}
+
+	secureConn = true
+	return publicCerts, rootCAs, secureConn, err
 }
@@ -1,64 +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 (
-	"net"
-	"os"
-	"syscall"
-)
-
-// checkPortAvailability - check if given port is already in use.
-// Note: The check method tries to listen on given port and closes it.
-// It is possible to have a disconnected client in this tiny window of time.
-func checkPortAvailability(port string) error {
-	network := [3]string{"tcp", "tcp4", "tcp6"}
-	for _, n := range network {
-		l, err := net.Listen(n, net.JoinHostPort("", port))
-		if err != nil {
-			if isAddrInUse(err) {
-				// Return error if another process is listening on the
-				// same port.
-				return err
-			}
-			// Ignore any other error (ex. EAFNOSUPPORT)
-			continue
-		}
-
-		// look for error so we don't have dangling connection
-		if err = l.Close(); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// Return true if err is "address already in use" error.
-// syscall.EADDRINUSE is available on all OSes.
-func isAddrInUse(err error) bool {
-	if opErr, ok := err.(*net.OpError); ok {
-		if sysErr, ok := opErr.Err.(*os.SyscallError); ok {
-			if errno, ok := sysErr.Err.(syscall.Errno); ok {
-				if errno == syscall.EADDRINUSE {
-					return true
-				}
-			}
-		}
-	}
-	return false
-}
@@ -1,54 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 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.
- * 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 (
-	"net"
-	"runtime"
-	"testing"
-)
-
-// Tests for port availability logic written for server startup sequence.
-func TestCheckPortAvailability(t *testing.T) {
-	tests := []struct {
-		port string
-	}{
-		{getFreePort()},
-		{getFreePort()},
-	}
-	for _, test := range tests {
-		// This test should pass if the ports are available
-		err := checkPortAvailability(test.port)
-		if err != nil {
-			t.Fatalf("checkPortAvailability test failed for port: %s. Error: %v", test.port, err)
-		}
-
-		// Now use the ports and check again
-		ln, err := net.Listen("tcp", net.JoinHostPort("", test.port))
-		if err != nil {
-			t.Fail()
-		}
-		defer ln.Close()
-
-		err = checkPortAvailability(test.port)
-
-		// Skip if the os is windows due to https://github.com/golang/go/issues/7598
-		if err == nil && runtime.GOOS != globalWindowsOSName {
-			t.Fatalf("checkPortAvailability should fail for port: %s. Error: %v", test.port, err)
-		}
-	}
-}
@@ -21,7 +21,6 @@ import (
 	"sync"

 	homedir "github.com/minio/go-homedir"
-	"github.com/minio/mc/pkg/console"
 )

 const (
@@ -97,9 +96,7 @@ func (config *ConfigDir) GetPrivateKeyFile() string {

 func mustGetDefaultConfigDir() string {
 	homeDir, err := homedir.Dir()
-	if err != nil {
-		console.Fatalln("Unable to get home directory.", err)
-	}
+	fatalIf(err, "Unable to get home directory.")

 	return filepath.Join(homeDir, defaultMinioConfigDir)
 }
@@ -133,7 +130,3 @@ func getPublicCertFile() string {
 func getPrivateKeyFile() string {
 	return configDir.GetPrivateKeyFile()
 }
-
-func isConfigFileExists() bool {
-	return isFile(getConfigFile())
-}
@@ -17,6 +17,7 @@
 package cmd

 import (
+	"fmt"
 	"io/ioutil"
 	"os"
 	"testing"
@@ -45,12 +46,12 @@ func TestServerConfigMigrateV1(t *testing.T) {
 		t.Fatal("Unexpected error: ", err)
 	}
 	// Check if config v1 is removed from filesystem
-	if _, err := os.Stat(configPath); err == nil || !os.IsNotExist(err) {
+	if _, err := osStat(configPath); err == nil || !os.IsNotExist(err) {
 		t.Fatal("Config V1 file is not purged")
 	}

 	// Initialize server config and check again if everything is fine
-	if err := loadConfig(envParams{}); err != nil {
+	if err := loadConfig(); err != nil {
 		t.Fatalf("Unable to initialize from updated config file %s", err)
 	}
 }
@@ -109,10 +110,23 @@ func TestServerConfigMigrateInexistentConfig(t *testing.T) {
 	if err := migrateV13ToV14(); err != nil {
 		t.Fatal("migrate v13 to v14 should succeed when no config file is found")
 	}
+	if err := migrateV14ToV15(); err != nil {
+		t.Fatal("migrate v14 to v15 should succeed when no config file is found")
+	}
+	if err := migrateV15ToV16(); err != nil {
+		t.Fatal("migrate v15 to v16 should succeed when no config file is found")
+	}
+	if err := migrateV16ToV17(); err != nil {
+		t.Fatal("migrate v16 to v17 should succeed when no config file is found")
+	}
+	if err := migrateV17ToV18(); err != nil {
+		t.Fatal("migrate v17 to v18 should succeed when no config file is found")
+	}
+
 }

-// Test if a config migration from v2 to v12 is successfully done
-func TestServerConfigMigrateV2toV14(t *testing.T) {
+// Test if a config migration from v2 to v18 is successfully done
+func TestServerConfigMigrateV2toV18(t *testing.T) {
 	rootPath, err := newTestConfig(globalMinioDefaultRegion)
 	if err != nil {
 		t.Fatalf("Init Test config failed")
@@ -140,18 +154,19 @@ func TestServerConfigMigrateV2toV14(t *testing.T) {
 	if err := ioutil.WriteFile(configPath, []byte(configJSON), 0644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
+
 	// Fire a migrateConfig()
 	if err := migrateConfig(); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}

 	// Initialize server config and check again if everything is fine
-	if err := loadConfig(envParams{}); err != nil {
+	if err := loadConfig(); err != nil {
 		t.Fatalf("Unable to initialize from updated config file %s", err)
 	}

 	// Check the version number in the upgraded config file
-	expectedVersion := v14
+	expectedVersion := v18
 	if serverConfig.Version != expectedVersion {
 		t.Fatalf("Expect version "+expectedVersion+", found: %v", serverConfig.Version)
 	}
@@ -178,7 +193,7 @@ func TestServerConfigMigrateFaultyConfig(t *testing.T) {
 	configPath := rootPath + "/" + minioConfigFile

 	// Create a corrupted config file
-	if err := ioutil.WriteFile(configPath, []byte("{ \"version\":\""), 0644); err != nil {
+	if err := ioutil.WriteFile(configPath, []byte("{ \"version\":\"2\", \"test\":"), 0644); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}

@@ -219,4 +234,52 @@ func TestServerConfigMigrateFaultyConfig(t *testing.T) {
 	if err := migrateV13ToV14(); err == nil {
 		t.Fatal("migrateConfigV13ToV14() should fail with a corrupted json")
 	}
+	if err := migrateV14ToV15(); err == nil {
+		t.Fatal("migrateConfigV14ToV15() should fail with a corrupted json")
+	}
+	if err := migrateV15ToV16(); err == nil {
+		t.Fatal("migrateConfigV15ToV16() should fail with a corrupted json")
+	}
+	if err := migrateV16ToV17(); err == nil {
+		t.Fatal("migrateConfigV16ToV17() should fail with a corrupted json")
+	}
+	if err := migrateV17ToV18(); err == nil {
+		t.Fatal("migrateConfigV17ToV18() should fail with a corrupted json")
+	}
+}
+
+// Test if all migrate code returns error with corrupted config files
+func TestServerConfigMigrateCorruptedConfig(t *testing.T) {
+	rootPath, err := newTestConfig(globalMinioDefaultRegion)
+	if err != nil {
+		t.Fatalf("Init Test config failed")
+	}
+	// remove the root directory after the test ends.
+	defer removeAll(rootPath)
+
+	setConfigDir(rootPath)
+	configPath := rootPath + "/" + minioConfigFile
+
+	for i := 3; i <= 17; i++ {
+		// Create a corrupted config file
+		if err = ioutil.WriteFile(configPath, []byte(fmt.Sprintf("{ \"version\":\"%d\", \"credential\": { \"accessKey\": 1 } }", i)),
+			0644); err != nil {
+			t.Fatal("Unexpected error: ", err)
+		}
+
+		// Test different migrate versions and be sure they are returning an error
+		if err = migrateConfig(); err == nil {
+			t.Fatal("migrateConfig() should fail with a corrupted json")
+		}
+	}
+
+	// Create a corrupted config file for version '2'.
+	if err = ioutil.WriteFile(configPath, []byte("{ \"version\":\"2\", \"credentials\": { \"accessKeyId\": 1 } }"), 0644); err != nil {
+		t.Fatal("Unexpected error: ", err)
+	}
+
+	// Test different migrate versions and be sure they are returning an error
+	if err = migrateConfig(); err == nil {
+		t.Fatal("migrateConfig() should fail with a corrupted json")
+	}
 }
@@ -16,30 +16,7 @@

 package cmd

-import (
-	"os"
-	"path/filepath"
-	"sync"
-
-	"github.com/minio/minio/pkg/quick"
-)
-
-func loadOldConfig(configFile string, config interface{}) (interface{}, error) {
-	if _, err := os.Stat(configFile); err != nil {
-		return nil, err
-	}
-
-	qc, err := quick.New(config)
-	if err != nil {
-		return nil, err
-	}
-
-	if err = qc.Load(configFile); err != nil {
-		return nil, err
-	}
-
-	return config, nil
-}
+import "sync"

 /////////////////// Config V1 ///////////////////
 type configV1 struct {
@@ -48,16 +25,6 @@ type configV1 struct {
 	SecretKey string `json:"secretAccessKey"`
 }

-// loadConfigV1 load config
-func loadConfigV1() (*configV1, error) {
-	configFile := filepath.Join(getConfigDir(), "fsUsers.json")
-	config, err := loadOldConfig(configFile, &configV1{Version: "1"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*configV1), err
-}
-
 /////////////////// Config V2 ///////////////////
 type configV2 struct {
 	Version     string `json:"version"`
@@ -80,18 +47,7 @@ type configV2 struct {
 	} `json:"fileLogger"`
 }

-// loadConfigV2 load config version '2'.
-func loadConfigV2() (*configV2, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &configV2{Version: "2"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*configV2), err
-}
-
 /////////////////// Config V3 ///////////////////
-
 // backendV3 type.
 type backendV3 struct {
 	Type  string   `json:"type"`
@@ -143,16 +99,6 @@ type configV3 struct {
 	Logger loggerV3 `json:"logger"`
 }

-// loadConfigV3 load config version '3'.
-func loadConfigV3() (*configV3, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &configV3{Version: "3"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*configV3), err
-}
-
 // logger type representing version '4' logger config.
 type loggerV4 struct {
 	Console struct {
@@ -183,16 +129,6 @@ type configV4 struct {
 	Logger loggerV4 `json:"logger"`
 }

-// loadConfigV4 load config version '4'.
-func loadConfigV4() (*configV4, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &configV4{Version: "4"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*configV4), err
-}
-
 // logger type representing version '5' logger config.
 type loggerV5 struct {
 	Console struct {
@@ -250,20 +186,22 @@ type configV5 struct {
 	Logger loggerV5 `json:"logger"`
 }

-// loadConfigV5 load config version '5'.
-func loadConfigV5() (*configV5, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &configV5{Version: "5"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*configV5), err
+// consoleLogger - default logger if not other logging is enabled.
+type consoleLoggerV1 struct {
+	Enable bool   `json:"enable"`
+	Level  string `json:"level"`
+}
+
+type fileLoggerV1 struct {
+	Enable   bool   `json:"enable"`
+	Filename string `json:"fileName"`
+	Level    string `json:"level"`
 }

 type loggerV6 struct {
-	Console consoleLogger  `json:"console"`
-	File    fileLogger     `json:"file"`
-	Syslog  syslogLoggerV3 `json:"syslog"`
+	Console consoleLoggerV1 `json:"console"`
+	File    fileLoggerV1    `json:"file"`
+	Syslog  syslogLoggerV3  `json:"syslog"`
 }

 // configV6 server configuration version '6'.
@@ -281,16 +219,6 @@ type configV6 struct {
 	Notify notifierV1 `json:"notify"`
 }

-// loadConfigV6 load config version '6'.
-func loadConfigV6() (*configV6, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &configV6{Version: "6"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*configV6), err
-}
-
 // Notifier represents collection of supported notification queues in version
 // 1 without NATS streaming.
 type notifierV1 struct {
@@ -331,16 +259,6 @@ type serverConfigV7 struct {
 	rwMutex *sync.RWMutex
 }

-// loadConfigV7 load config version '7'.
-func loadConfigV7() (*serverConfigV7, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV7{Version: "7"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV7), err
-}
-
 // serverConfigV8 server configuration version '8'. Adds NATS notifier
 // configuration.
 type serverConfigV8 struct {
@@ -360,16 +278,6 @@ type serverConfigV8 struct {
 	rwMutex *sync.RWMutex
 }

-// loadConfigV8 load config version '8'.
-func loadConfigV8() (*serverConfigV8, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV8{Version: "8"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV8), err
-}
-
 // serverConfigV9 server configuration version '9'. Adds PostgreSQL
 // notifier configuration.
 type serverConfigV9 struct {
@@ -389,13 +297,10 @@ type serverConfigV9 struct {
 	rwMutex *sync.RWMutex
 }

-func loadConfigV9() (*serverConfigV9, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV9{Version: "9"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV9), err
+type loggerV7 struct {
+	sync.RWMutex
+	Console consoleLoggerV1 `json:"console"`
+	File    fileLoggerV1    `json:"file"`
 }

 // serverConfigV10 server configuration version '10' which is like
@@ -409,21 +314,12 @@ type serverConfigV10 struct {
 	Region     string     `json:"region"`

 	// Additional error logging configuration.
-	Logger logger `json:"logger"`
+	Logger loggerV7 `json:"logger"`

 	// Notification queue configuration.
 	Notify notifierV1 `json:"notify"`
 }

-func loadConfigV10() (*serverConfigV10, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV10{Version: "10"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV10), err
-}
-
 // natsNotifyV1 - structure was valid until config V 11
 type natsNotifyV1 struct {
 	Enable       bool   `json:"enable"`
@@ -446,21 +342,12 @@ type serverConfigV11 struct {
 	Region     string     `json:"region"`

 	// Additional error logging configuration.
-	Logger logger `json:"logger"`
+	Logger loggerV7 `json:"logger"`

 	// Notification queue configuration.
 	Notify notifierV1 `json:"notify"`
 }

-func loadConfigV11() (*serverConfigV11, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV11{Version: "11"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV11), err
-}
-
 // serverConfigV12 server configuration version '12' which is like
 // version '11' except it adds support for NATS streaming notifications.
 type serverConfigV12 struct {
@@ -471,21 +358,12 @@ type serverConfigV12 struct {
 	Region     string     `json:"region"`

 	// Additional error logging configuration.
-	Logger logger `json:"logger"`
+	Logger loggerV7 `json:"logger"`

 	// Notification queue configuration.
 	Notify notifierV2 `json:"notify"`
 }

-func loadConfigV12() (*serverConfigV12, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV12{Version: "12"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV12), err
-}
-
 // serverConfigV13 server configuration version '13' which is like
 // version '12' except it adds support for webhook notification.
 type serverConfigV13 struct {
@@ -496,17 +374,78 @@ type serverConfigV13 struct {
 	Region     string     `json:"region"`

 	// Additional error logging configuration.
-	Logger *logger `json:"logger"`
+	Logger *loggerV7 `json:"logger"`

 	// Notification queue configuration.
 	Notify *notifier `json:"notify"`
 }

-func loadConfigV13() (*serverConfigV13, error) {
-	configFile := getConfigFile()
-	config, err := loadOldConfig(configFile, &serverConfigV13{Version: "13"})
-	if config == nil {
-		return nil, err
-	}
-	return config.(*serverConfigV13), err
+// serverConfigV14 server configuration version '14' which is like
+// version '13' except it adds support of browser param.
+type serverConfigV14 struct {
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential credential  `json:"credential"`
+	Region     string      `json:"region"`
+	Browser    BrowserFlag `json:"browser"`
+
+	// Additional error logging configuration.
+	Logger *loggerV7 `json:"logger"`
+
+	// Notification queue configuration.
+	Notify *notifier `json:"notify"`
+}
+
+// serverConfigV15 server configuration version '15' which is like
+// version '14' except it adds mysql support
+type serverConfigV15 struct {
+	Version string `json:"version"`
+
+	// S3 API configuration.
+	Credential credential  `json:"credential"`
+	Region     string      `json:"region"`
+	Browser    BrowserFlag `json:"browser"`
+
+	// Additional error logging configuration.
+	Logger *loggerV7 `json:"logger"`
+
+	// Notification queue configuration.
+	Notify *notifier `json:"notify"`
+}
+
+// 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"`
+
+	// Additional error logging configuration.
+	Logger *loggers `json:"logger"`
+
+	// Notification queue configuration.
+	Notify *notifier `json:"notify"`
+}
+
+// serverConfigV17 server configuration version '17' which is like
+// version '16' except it adds support for "format" parameter in
+// database event notification targets: PostgreSQL, MySQL, Redis and
+// Elasticsearch.
+type serverConfigV17 struct {
+	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"`
 }
@@ -20,51 +20,119 @@ import (
 	"errors"
 	"fmt"
 	"io/ioutil"
-	"os"
-	"strings"
 	"sync"

 	"github.com/minio/minio/pkg/quick"
 	"github.com/tidwall/gjson"
 )

-// Read Write mutex for safe access to ServerConfig.
-var serverConfigMu sync.RWMutex
-
 // Config version
-var v14 = "14"
+const v18 = "18"

-// serverConfigV14 server configuration version '14' which is like
-// version '13' except it adds support of browser param.
-type serverConfigV14 struct {
+var (
+	// serverConfig server config.
+	serverConfig   *serverConfigV18
+	serverConfigMu sync.RWMutex
+)
+
+// serverConfigV18 server configuration version '18' which is like
+// version '17' except it adds support for "deliveryMode" parameter in
+// the AMQP notification target.
+type serverConfigV18 struct {
+	sync.RWMutex
 	Version string `json:"version"`

 	// S3 API configuration.
-	Credential credential `json:"credential"`
-	Region     string     `json:"region"`
-	Browser    string     `json:"browser"`
+	Credential credential  `json:"credential"`
+	Region     string      `json:"region"`
+	Browser    BrowserFlag `json:"browser"`

 	// Additional error logging configuration.
-	Logger *logger `json:"logger"`
+	Logger *loggers `json:"logger"`

 	// Notification queue configuration.
 	Notify *notifier `json:"notify"`
 }

-func newServerConfigV14() *serverConfigV14 {
-	srvCfg := &serverConfigV14{
-		Version: v14,
-		Region:  globalMinioDefaultRegion,
-		Logger:  &logger{},
-		Notify:  &notifier{},
+// GetVersion get current config version.
+func (s *serverConfigV18) GetVersion() string {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.Version
+}
+
+// SetRegion set new region.
+func (s *serverConfigV18) SetRegion(region string) {
+	s.Lock()
+	defer s.Unlock()
+
+	s.Region = region
+}
+
+// GetRegion get current region.
+func (s *serverConfigV18) GetRegion() string {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.Region
+}
+
+// SetCredentials set new credentials.
+func (s *serverConfigV18) SetCredential(creds credential) {
+	s.Lock()
+	defer s.Unlock()
+
+	// Set updated credential.
+	s.Credential = creds
+}
+
+// GetCredentials get current credentials.
+func (s *serverConfigV18) GetCredential() credential {
+	s.RLock()
+	defer s.RUnlock()
+
+	return s.Credential
+}
+
+// SetBrowser set if browser is enabled.
+func (s *serverConfigV18) SetBrowser(b bool) {
+	s.Lock()
+	defer s.Unlock()
+
+	// Set the new value.
+	s.Browser = BrowserFlag(b)
+}
+
+// GetCredentials get current credentials.
+func (s *serverConfigV18) GetBrowser() bool {
+	s.RLock()
+	defer s.RUnlock()
+
+	return bool(s.Browser)
+}
+
+// Save config.
+func (s *serverConfigV18) Save() error {
+	s.RLock()
+	defer s.RUnlock()
+
+	// Save config file.
+	return quick.Save(getConfigFile(), s)
+}
+
+func newServerConfigV18() *serverConfigV18 {
+	srvCfg := &serverConfigV18{
+		Version:    v18,
+		Credential: mustGetNewCredential(),
+		Region:     globalMinioDefaultRegion,
+		Browser:    true,
+		Logger:     &loggers{},
+		Notify:     &notifier{},
 	}
-	srvCfg.SetCredential(mustGetNewCredential())
-	srvCfg.SetBrowser("on")
+
 	// Enable console logger by default on a fresh run.
-	srvCfg.Logger.Console = consoleLogger{
-		Enable: true,
-		Level:  "error",
-	}
+	srvCfg.Logger.Console = NewConsoleLogger()

 	// Make sure to initialize notification configs.
 	srvCfg.Notify.AMQP = make(map[string]amqpNotify)
@@ -77,6 +145,8 @@ func newServerConfigV14() *serverConfigV14 {
 	srvCfg.Notify.NATS["1"] = natsNotify{}
 	srvCfg.Notify.PostgreSQL = make(map[string]postgreSQLNotify)
 	srvCfg.Notify.PostgreSQL["1"] = postgreSQLNotify{}
+	srvCfg.Notify.MySQL = make(map[string]mySQLNotify)
+	srvCfg.Notify.MySQL["1"] = mySQLNotify{}
 	srvCfg.Notify.Kafka = make(map[string]kafkaNotify)
 	srvCfg.Notify.Kafka["1"] = kafkaNotify{}
 	srvCfg.Notify.Webhook = make(map[string]webhookNotify)
@@ -87,22 +157,21 @@ func newServerConfigV14() *serverConfigV14 {

 // newConfig - initialize a new server config, saves env parameters if
 // found, otherwise use default parameters
-func newConfig(envParams envParams) error {
+func newConfig() error {
 	// Initialize server config.
-	srvCfg := newServerConfigV14()
+	srvCfg := newServerConfigV18()

-	// If env is set for a fresh start, save them to config file.
+	// If env is set override the credentials from config file.
 	if globalIsEnvCreds {
-		srvCfg.SetCredential(envParams.creds)
+		srvCfg.SetCredential(globalActiveCred)
 	}

 	if globalIsEnvBrowser {
-		srvCfg.SetBrowser(envParams.browser)
+		srvCfg.SetBrowser(globalIsBrowserEnabled)
 	}

-	// Create config path.
-	if err := createConfigDir(); err != nil {
-		return err
+	if globalIsEnvRegion {
+		srvCfg.SetRegion(globalServerRegion)
 	}

 	// hold the mutex lock before a new config is assigned.
@@ -116,51 +185,6 @@ func newConfig(envParams envParams) error {
 	return serverConfig.Save()
 }

-// loadConfig - loads a new config from disk, overrides params from env
-// if found and valid
-func loadConfig(envParams envParams) error {
-	configFile := getConfigFile()
-	if _, err := os.Stat(configFile); err != nil {
-		return err
-	}
-
-	srvCfg := &serverConfigV14{}
-
-	qc, err := quick.New(srvCfg)
-	if err != nil {
-		return err
-	}
-
-	if err = qc.Load(configFile); err != nil {
-		return err
-	}
-
-	// If env is set override the credentials from config file.
-	if globalIsEnvCreds {
-		srvCfg.SetCredential(envParams.creds)
-	}
-
-	if globalIsEnvBrowser {
-		srvCfg.SetBrowser(envParams.browser)
-	}
-
-	if strings.ToLower(srvCfg.GetBrowser()) == "off" {
-		globalIsBrowserEnabled = false
-	}
-
-	// hold the mutex lock before a new config is assigned.
-	serverConfigMu.Lock()
-	// Save the loaded config globally.
-	serverConfig = srvCfg
-	serverConfigMu.Unlock()
-
-	if serverConfig.Version != v14 {
-		return errors.New("Unsupported config version `" + serverConfig.Version + "`.")
-	}
-
-	return nil
-}
-
 // doCheckDupJSONKeys recursively detects duplicate json keys
 func doCheckDupJSONKeys(key, value gjson.Result) error {
 	// Key occurrences map of the current scope to count
@@ -212,159 +236,86 @@ func checkDupJSONKeys(json string) error {
 	return doCheckDupJSONKeys(rootKey, config)
 }

-// validateConfig checks for
-func validateConfig() error {
+// getValidConfig - returns valid server configuration
+func getValidConfig() (*serverConfigV18, error) {
+	srvCfg := &serverConfigV18{
+		Region:  globalMinioDefaultRegion,
+		Browser: true,
+	}

-	// Get file config path
 	configFile := getConfigFile()
-
-	srvCfg := &serverConfigV14{}
-
-	// Load config file
-	qc, err := quick.New(srvCfg)
-	if err != nil {
-		return err
-	}
-	if err = qc.Load(configFile); err != nil {
-		return err
+	if _, err := quick.Load(configFile, srvCfg); err != nil {
+		return nil, err
 	}

-	// Check if config version is valid
-	if srvCfg.GetVersion() != v14 {
-		return errors.New("bad config version, expected: " + v14)
+	if srvCfg.Version != v18 {
+		return nil, fmt.Errorf("configuration version mismatch. Expected: ‘%s’, Got: ‘%s’", v18, srvCfg.Version)
 	}

 	// Load config file json and check for duplication json keys
 	jsonBytes, err := ioutil.ReadFile(configFile)
 	if err != nil {
-		return err
+		return nil, err
 	}
-	if err := checkDupJSONKeys(string(jsonBytes)); err != nil {
-		return err
+	if err = checkDupJSONKeys(string(jsonBytes)); err != nil {
+		return nil, err
 	}

-	// Validate region field
-	if srvCfg.GetRegion() == "" {
-		return errors.New("Region config value cannot be empty")
-	}
+	// Validate credential fields only when
+	// they are not set via the environment

-	// Validate browser field
-	if b := strings.ToLower(srvCfg.GetBrowser()); b != "on" && b != "off" {
-		return fmt.Errorf("Browser config value %s is invalid", b)
-	}
-
-	// Validate credential field
-	if !srvCfg.Credential.IsValid() {
-		return errors.New("invalid credential")
+	// Error out if global is env credential is not set and config has invalid credential
+	if !globalIsEnvCreds && !srvCfg.Credential.IsValid() {
+		return nil, errors.New("invalid credential in config file " + configFile)
 	}

 	// Validate logger field
-	if err := srvCfg.Logger.Validate(); err != nil {
-		return err
+	if err = srvCfg.Logger.Validate(); err != nil {
+		return nil, err
 	}

 	// Validate notify field
-	if err := srvCfg.Notify.Validate(); err != nil {
-		return err
+	if err = srvCfg.Notify.Validate(); err != nil {
+		return nil, err
 	}

-	return nil
+	return srvCfg, nil
 }

-// serverConfig server config.
-var serverConfig *serverConfigV14
-
-// GetVersion get current config version.
-func (s serverConfigV14) GetVersion() string {
-	serverConfigMu.RLock()
-	defer serverConfigMu.RUnlock()
-
-	return s.Version
-}
-
-// SetRegion set new region.
-func (s *serverConfigV14) SetRegion(region string) {
-	serverConfigMu.Lock()
-	defer serverConfigMu.Unlock()
-
-	// Empty region means "us-east-1" by default from S3 spec.
-	if region == "" {
-		region = "us-east-1"
-	}
-	s.Region = region
-}
-
-// GetRegion get current region.
-func (s serverConfigV14) GetRegion() string {
-	serverConfigMu.RLock()
-	defer serverConfigMu.RUnlock()
-
-	if s.Region != "" {
-		return s.Region
-	} // region empty
-
-	// Empty region means "us-east-1" by default from S3 spec.
-	return "us-east-1"
-}
-
-// SetCredentials set new credentials.
-func (s *serverConfigV14) SetCredential(creds credential) {
-	serverConfigMu.Lock()
-	defer serverConfigMu.Unlock()
-
-	// Set updated credential.
-	s.Credential = creds
-}
-
-// GetCredentials get current credentials.
-func (s serverConfigV14) GetCredential() credential {
-	serverConfigMu.RLock()
-	defer serverConfigMu.RUnlock()
-
-	return s.Credential
-}
-
-// SetBrowser set if browser is enabled.
-func (s *serverConfigV14) SetBrowser(v string) {
-	serverConfigMu.Lock()
-	defer serverConfigMu.Unlock()
-
-	// Set browser param
-	if v == "" {
-		v = "on" // Browser is on by default.
-	}
-
-	// Set the new value.
-	s.Browser = v
-}
-
-// GetCredentials get current credentials.
-func (s serverConfigV14) GetBrowser() string {
-	serverConfigMu.RLock()
-	defer serverConfigMu.RUnlock()
-
-	if s.Browser != "" {
-		return s.Browser
-	} // empty browser.
-
-	// Empty browser means "on" by default.
-	return "on"
-}
-
-// Save config.
-func (s serverConfigV14) Save() error {
-	serverConfigMu.RLock()
-	defer serverConfigMu.RUnlock()
-
-	// get config file.
-	configFile := getConfigFile()
-
-	// initialize quick.
-	qc, err := quick.New(&s)
+// loadConfig - loads a new config from disk, overrides params from env
+// if found and valid
+func loadConfig() error {
+	srvCfg, err := getValidConfig()
 	if err != nil {
 		return err
 	}

-	// Save config file.
-	return qc.Save(configFile)
+	// If env is set override the credentials from config file.
+	if globalIsEnvCreds {
+		srvCfg.SetCredential(globalActiveCred)
+	}
+
+	if globalIsEnvBrowser {
+		srvCfg.SetBrowser(globalIsBrowserEnabled)
+	}
+
+	if globalIsEnvRegion {
+		srvCfg.SetRegion(globalServerRegion)
+	}
+
+	// hold the mutex lock before a new config is assigned.
+	serverConfigMu.Lock()
+	serverConfig = srvCfg
+	if !globalIsEnvCreds {
+		globalActiveCred = serverConfig.GetCredential()
+	}
+	if !globalIsEnvBrowser {
+		globalIsBrowserEnabled = serverConfig.GetBrowser()
+	}
+	if !globalIsEnvRegion {
+		globalServerRegion = serverConfig.GetRegion()
+	}
+	serverConfigMu.Unlock()
+
+	return nil
 }
@@ -76,38 +76,41 @@ func TestServerConfig(t *testing.T) {
 	serverConfig.Notify.SetWebhookByID("2", webhookNotify{})
 	savedNotifyCfg5 := serverConfig.Notify.GetWebhookByID("2")
 	if !reflect.DeepEqual(savedNotifyCfg5, webhookNotify{}) {
-		t.Errorf("Expecting Webhook config %#v found %#v", webhookNotify{}, savedNotifyCfg3)
+		t.Errorf("Expecting Webhook config %#v found %#v", webhookNotify{}, savedNotifyCfg5)
 	}

 	// Set new console logger.
-	serverConfig.Logger.SetConsole(consoleLogger{
-		Enable: true,
-	})
+	// Set new Webhook notification id.
+	serverConfig.Notify.SetMySQLByID("2", mySQLNotify{})
+	savedNotifyCfg6 := serverConfig.Notify.GetMySQLByID("2")
+	if !reflect.DeepEqual(savedNotifyCfg6, mySQLNotify{}) {
+		t.Errorf("Expecting Webhook config %#v found %#v", mySQLNotify{}, savedNotifyCfg6)
+	}
+
+	consoleLogger := NewConsoleLogger()
+	serverConfig.Logger.SetConsole(consoleLogger)
 	consoleCfg := serverConfig.Logger.GetConsole()
-	if !reflect.DeepEqual(consoleCfg, consoleLogger{Enable: true}) {
-		t.Errorf("Expecting console logger config %#v found %#v", consoleLogger{Enable: true}, consoleCfg)
+	if !reflect.DeepEqual(consoleCfg, consoleLogger) {
+		t.Errorf("Expecting console logger config %#v found %#v", consoleLogger, consoleCfg)
 	}
 	// Set new console logger.
-	serverConfig.Logger.SetConsole(consoleLogger{
-		Enable: false,
-	})
+	consoleLogger.Enable = false
+	serverConfig.Logger.SetConsole(consoleLogger)

 	// Set new file logger.
-	serverConfig.Logger.SetFile(fileLogger{
-		Enable: true,
-	})
+	fileLogger := NewFileLogger("test-log-file")
+	serverConfig.Logger.SetFile(fileLogger)
 	fileCfg := serverConfig.Logger.GetFile()
-	if !reflect.DeepEqual(fileCfg, fileLogger{Enable: true}) {
-		t.Errorf("Expecting file logger config %#v found %#v", fileLogger{Enable: true}, consoleCfg)
+	if !reflect.DeepEqual(fileCfg, fileLogger) {
+		t.Errorf("Expecting file logger config %#v found %#v", fileLogger, fileCfg)
 	}
 	// Set new file logger.
-	serverConfig.Logger.SetFile(fileLogger{
-		Enable: false,
-	})
+	fileLogger.Enable = false
+	serverConfig.Logger.SetFile(fileLogger)

 	// Match version.
-	if serverConfig.GetVersion() != v14 {
-		t.Errorf("Expecting version %s found %s", serverConfig.GetVersion(), v14)
+	if serverConfig.GetVersion() != v18 {
+		t.Errorf("Expecting version %s found %s", serverConfig.GetVersion(), v18)
 	}

 	// Attempt to save.
@@ -119,7 +122,7 @@ func TestServerConfig(t *testing.T) {
 	setConfigDir(rootPath)

 	// Initialize server config.
-	if err := loadConfig(envParams{}); err != nil {
+	if err := loadConfig(); err != nil {
 		t.Fatalf("Unable to initialize from updated config file %s", err)
 	}
 }
@@ -135,10 +138,10 @@ func TestServerConfigWithEnvs(t *testing.T) {
 	os.Setenv("MINIO_SECRET_KEY", "minio123")
 	defer os.Unsetenv("MINIO_SECRET_KEY")

-	defer func() {
-		globalIsEnvBrowser = false
-		globalIsEnvCreds = false
-	}()
+	os.Setenv("MINIO_REGION", "us-west-1")
+	defer os.Unsetenv("MINIO_REGION")
+
+	defer resetGlobalIsEnvs()

 	// Get test root.
 	rootPath, err := getTestRoot()
@@ -146,6 +149,8 @@ func TestServerConfigWithEnvs(t *testing.T) {
 		t.Error(err)
 	}

+	serverHandleEnvVars()
+
 	// Do this only once here.
 	setConfigDir(rootPath)

@@ -156,8 +161,13 @@ func TestServerConfigWithEnvs(t *testing.T) {
 	defer removeAll(rootPath)

 	// Check if serverConfig has
-	if serverConfig.GetBrowser() != "off" {
-		t.Errorf("Expecting browser `off` found %s", serverConfig.GetBrowser())
+	if serverConfig.GetBrowser() {
+		t.Errorf("Expecting browser is set to false found %v", serverConfig.GetBrowser())
+	}
+
+	// Check if serverConfig has
+	if serverConfig.GetRegion() != "us-west-1" {
+		t.Errorf("Expecting region to be \"us-west-1\" found %v", serverConfig.GetRegion())
 	}

 	// Check if serverConfig has
@@ -170,6 +180,7 @@ func TestServerConfigWithEnvs(t *testing.T) {
 	if cred.SecretKey != "minio123" {
 		t.Errorf("Expecting access key to be `minio123` found %s", cred.SecretKey)
 	}
+
 }

 func TestCheckDupJSONKeys(t *testing.T) {
@@ -212,7 +223,7 @@ func TestValidateConfig(t *testing.T) {

 	configPath := filepath.Join(rootPath, minioConfigFile)

-	v := v14
+	v := v18

 	testCases := []struct {
 		configData string
@@ -248,39 +259,63 @@ 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 - Wrong Console logger level
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "logger": { "console": { "enable": true, "level": "foo" } }}`, 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 - Wrong File logger level
-		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "logger": { "file": { "enable": true, "level": "foo" } }}`, false},
-
-		// Test 13 - Test AMQP
+		// Test 12 - 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 14 - Test NATS
+		// Test 13 - 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 15 - Test ElasticSearch
+		// Test 14 - Test ElasticSearch
 		{`{"version": "` + v + `", "credential": { "accessKey": "minio", "secretKey": "minio123" }, "region": "us-east-1", "browser": "on", "notify": { "elasticsearch": { "1": { "enable": true, "url": "", "index": "" } }}}`, false},

-		// Test 16 - Test Redis
+		// Test 15 - 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 17 - Test PostgreSQL
+		// Test 16 - 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 18 - Test Kafka
+		// Test 17 - 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 19 - Test Webhook
+		// Test 18 - 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
+		{`{"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
+		{`{"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
+		{`{"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
+		{`{"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
+		{`{"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
+		{`{"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
+		{`{"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
+		{`{"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
+		{`{"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},
 	}

 	for i, testCase := range testCases {
 		if werr := ioutil.WriteFile(configPath, []byte(testCase.configData), 0700); werr != nil {
 			t.Fatal(werr)
 		}
-		verr := validateConfig()
+		_, verr := getValidConfig()
 		if testCase.shouldPass && verr != nil {
 			t.Errorf("Test %d, should pass but it failed with err = %v", i+1, verr)
 		}
@@ -0,0 +1,74 @@
+/*
+ * 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
+}
@@ -21,47 +21,39 @@ import (
 	"encoding/base64"
 	"errors"

-	"github.com/minio/mc/pkg/console"
-
 	"golang.org/x/crypto/bcrypt"
 )

 const (
-	accessKeyMinLen       = 5
-	accessKeyMaxLen       = 20
-	secretKeyMinLen       = 8
-	secretKeyMaxLenAmazon = 40
-	alphaNumericTable     = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-	alphaNumericTableLen  = byte(len(alphaNumericTable))
+	// Minimum length for Minio access key.
+	accessKeyMinLen = 5
+
+	// Maximum length for Minio access key.
+	accessKeyMaxLen = 20
+
+	// Minimum length for Minio secret key for both server and gateway mode.
+	secretKeyMinLen = 8
+
+	// Maximum secret key length for Minio, this
+	// is used when autogenerating new credentials.
+	secretKeyMaxLenMinio = 40
+
+	// Maximum secret key length allowed from client side
+	// caters for both server and gateway mode.
+	secretKeyMaxLen = 100
+
+	// Alpha numeric table used for generating access keys.
+	alphaNumericTable = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+	// Total length of the alpha numeric table.
+	alphaNumericTableLen = byte(len(alphaNumericTable))
 )

+// Common errors generated for access and secret key validation.
 var (
 	errInvalidAccessKeyLength = errors.New("Invalid access key, access key should be 5 to 20 characters in length")
-	errInvalidSecretKeyLength = errors.New("Invalid secret key, secret key should be 8 to 40 characters in length")
+	errInvalidSecretKeyLength = errors.New("Invalid secret key, secret key should be 8 to 100 characters in length")
 )
-var secretKeyMaxLen = secretKeyMaxLenAmazon
-
-func mustGetAccessKey() string {
-	keyBytes := make([]byte, accessKeyMaxLen)
-	if _, err := rand.Read(keyBytes); err != nil {
-		console.Fatalf("Unable to generate access key. Err: %s.\n", err)
-	}
-
-	for i := 0; i < accessKeyMaxLen; i++ {
-		keyBytes[i] = alphaNumericTable[keyBytes[i]%alphaNumericTableLen]
-	}
-
-	return string(keyBytes)
-}
-
-func mustGetSecretKey() string {
-	keyBytes := make([]byte, secretKeyMaxLen)
-	if _, err := rand.Read(keyBytes); err != nil {
-		console.Fatalf("Unable to generate secret key. Err: %s.\n", err)
-	}
-
-	return string([]byte(base64.StdEncoding.EncodeToString(keyBytes))[:secretKeyMaxLen])
-}

 // isAccessKeyValid - validate access key for right length.
 func isAccessKeyValid(accessKey string) bool {
@@ -127,25 +119,21 @@ func createCredential(accessKey, secretKey string) (cred credential, err error)
 func mustGetNewCredential() credential {
 	// Generate access key.
 	keyBytes := make([]byte, accessKeyMaxLen)
-	if _, err := rand.Read(keyBytes); err != nil {
-		console.Fatalln("Unable to generate access key.", err)
-	}
+	_, err := rand.Read(keyBytes)
+	fatalIf(err, "Unable to generate access key.")
 	for i := 0; i < accessKeyMaxLen; i++ {
 		keyBytes[i] = alphaNumericTable[keyBytes[i]%alphaNumericTableLen]
 	}
 	accessKey := string(keyBytes)

 	// Generate secret key.
-	keyBytes = make([]byte, secretKeyMaxLen)
-	if _, err := rand.Read(keyBytes); err != nil {
-		console.Fatalln("Unable to generate secret key.", err)
-	}
-	secretKey := string([]byte(base64.StdEncoding.EncodeToString(keyBytes))[:secretKeyMaxLen])
+	keyBytes = make([]byte, secretKeyMaxLenMinio)
+	_, err = rand.Read(keyBytes)
+	fatalIf(err, "Unable to generate secret key.")
+	secretKey := string([]byte(base64.StdEncoding.EncodeToString(keyBytes))[:secretKeyMaxLenMinio])

 	cred, err := createCredential(accessKey, secretKey)
-	if err != nil {
-		console.Fatalln("Unable to generate new credential.", err)
-	}
+	fatalIf(err, "Unable to generate new credential.")

 	return cred
 }
@@ -23,6 +23,9 @@ func TestMustGetNewCredential(t *testing.T) {
 	if !cred.IsValid() {
 		t.Fatalf("Failed to get new valid credential")
 	}
+	if len(cred.SecretKey) != secretKeyMaxLenMinio {
+		t.Fatalf("Invalid length %d of the secretKey credential generated, expected %d", len(cred.SecretKey), secretKeyMaxLenMinio)
+	}
 }

 func TestCreateCredential(t *testing.T) {
@@ -42,7 +45,7 @@ func TestCreateCredential(t *testing.T) {
 		// Secret key too small.
 		{"myuser", "pass", false, errInvalidSecretKeyLength},
 		// Secret key too long.
-		{"myuser", "pass1234567890123456789012345678901234567", false, errInvalidSecretKeyLength},
+		{"myuser", "pass1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890", false, errInvalidSecretKeyLength},
 		// Success when access key contains leading/trailing spaces.
 		{" user ", cred.SecretKey, true, nil},
 		{"myuser", "mypassword", true, nil},
@@ -0,0 +1,408 @@
+/*
+ * 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"
+	"net"
+	"net/url"
+	"path"
+	"sort"
+	"strconv"
+	"strings"
+
+	"github.com/minio/minio-go/pkg/set"
+)
+
+// EndpointType - enum for endpoint type.
+type EndpointType int
+
+const (
+	// PathEndpointType - path style endpoint type enum.
+	PathEndpointType EndpointType = iota + 1
+
+	// URLEndpointType - URL style endpoint type enum.
+	URLEndpointType
+)
+
+// Endpoint - any type of endpoint.
+type Endpoint struct {
+	*url.URL
+	IsLocal bool
+}
+
+func (endpoint Endpoint) String() string {
+	if endpoint.Host == "" {
+		return endpoint.Path
+	}
+
+	return endpoint.URL.String()
+}
+
+// Type - returns type of endpoint.
+func (endpoint Endpoint) Type() EndpointType {
+	if endpoint.Host == "" {
+		return PathEndpointType
+	}
+
+	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"
+	}
+}
+
+// NewEndpoint - returns new endpoint based on given arguments.
+func NewEndpoint(arg string) (Endpoint, error) {
+	// isEmptyPath - check whether given path is not empty.
+	isEmptyPath := func(path string) bool {
+		return path == "" || path == "/" || path == `\`
+	}
+
+	if isEmptyPath(arg) {
+		return Endpoint{}, fmt.Errorf("empty or root endpoint is not supported")
+	}
+
+	var isLocal bool
+	u, err := url.Parse(arg)
+	if err == nil && u.Host != "" {
+		// URL style of endpoint.
+		// Valid URL style endpoint is
+		// - Scheme field must contain "http" or "https"
+		// - All field should be empty except Host and Path.
+		if !((u.Scheme == "http" || u.Scheme == "https") &&
+			u.User == nil && u.Opaque == "" && u.ForceQuery == false && u.RawQuery == "" && u.Fragment == "") {
+			return Endpoint{}, fmt.Errorf("invalid URL endpoint format")
+		}
+
+		host, port, err := net.SplitHostPort(u.Host)
+		if err != nil {
+			if !strings.Contains(err.Error(), "missing port in address") {
+				return Endpoint{}, fmt.Errorf("invalid URL endpoint format: %s", err)
+			}
+
+			host = u.Host
+		} else {
+			var p int
+			p, err = strconv.Atoi(port)
+			if err != nil {
+				return Endpoint{}, fmt.Errorf("invalid URL endpoint format: invalid port number")
+			} else if p < 1 || p > 65535 {
+				return Endpoint{}, fmt.Errorf("invalid URL endpoint format: port number must be between 1 to 65535")
+			}
+		}
+
+		if host == "" {
+			return Endpoint{}, fmt.Errorf("invalid URL endpoint format: empty host name")
+		}
+
+		// As this is path in the URL, we should use path package, not filepath package.
+		// On MS Windows, filepath.Clean() converts into Windows path style ie `/foo` becomes `\foo`
+		u.Path = path.Clean(u.Path)
+		if isEmptyPath(u.Path) {
+			return Endpoint{}, fmt.Errorf("empty or root path is not supported in URL endpoint")
+		}
+
+		isLocal, err = isLocalHost(host)
+		if err != nil {
+			return Endpoint{}, err
+		}
+	} else {
+		u = &url.URL{Path: path.Clean(arg)}
+		isLocal = true
+	}
+
+	return Endpoint{
+		URL:     u,
+		IsLocal: isLocal,
+	}, nil
+}
+
+// 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]
+}
+
+// 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()
+	}
+}
+
+// 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
+
+	uniqueArgs := set.NewStringSet()
+	// Loop through args and adds to endpoint list.
+	for i, arg := range args {
+		endpoint, err := NewEndpoint(arg)
+		if err != nil {
+			return nil, fmt.Errorf("'%s': %s", arg, err.Error())
+		}
+
+		// All endpoints have to be same type and scheme if applicable.
+		if i == 0 {
+			endpointType = endpoint.Type()
+			scheme = endpoint.Scheme
+		} else if endpoint.Type() != endpointType {
+			return nil, fmt.Errorf("mixed style endpoints are not supported")
+		} else if endpoint.Scheme != scheme {
+			return nil, fmt.Errorf("mixed scheme is not supported")
+		}
+
+		arg = endpoint.String()
+		if uniqueArgs.Contains(arg) {
+			return nil, fmt.Errorf("duplicate endpoints found")
+		}
+		uniqueArgs.Add(arg)
+
+		endpoints = append(endpoints, endpoint)
+	}
+
+	sort.Sort(endpoints)
+
+	return endpoints, nil
+}
+
+// CreateEndpoints - validates and creates new endpoints for given args.
+func CreateEndpoints(serverAddr string, args ...string) (string, EndpointList, SetupType, error) {
+	var endpoints EndpointList
+	var setupType SetupType
+	var err error
+
+	// Check whether serverAddr is valid for this host.
+	if err = CheckLocalServerAddr(serverAddr); err != nil {
+		return serverAddr, endpoints, setupType, err
+	}
+
+	_, serverAddrPort := mustSplitHostPort(serverAddr)
+
+	// For single arg, return FS setup.
+	if len(args) == 1 {
+		var endpoint Endpoint
+		endpoint, err = NewEndpoint(args[0])
+		if err != nil {
+			return serverAddr, endpoints, setupType, err
+		}
+
+		if endpoint.Type() != PathEndpointType {
+			return serverAddr, endpoints, setupType, fmt.Errorf("use path style endpoint for FS setup")
+		}
+
+		endpoints = append(endpoints, endpoint)
+		setupType = FSSetupType
+		return serverAddr, endpoints, setupType, nil
+	}
+
+	// Convert args to endpoints
+	if endpoints, err = NewEndpointList(args...); err != nil {
+		return serverAddr, endpoints, setupType, err
+	}
+
+	// Return XL setup when all endpoints are path style.
+	if endpoints[0].Type() == PathEndpointType {
+		setupType = XLSetupType
+		return serverAddr, endpoints, setupType, nil
+	}
+
+	// Here all endpoints are URL style.
+	endpointPathSet := set.NewStringSet()
+	localEndpointCount := 0
+	localServerAddrSet := set.NewStringSet()
+	localPortSet := set.NewStringSet()
+	for _, endpoint := range endpoints {
+		endpointPathSet.Add(endpoint.Path)
+		if endpoint.IsLocal {
+			localServerAddrSet.Add(endpoint.Host)
+
+			var port string
+			_, port, err = net.SplitHostPort(endpoint.Host)
+			if err != nil {
+				port = serverAddrPort
+			}
+
+			localPortSet.Add(port)
+
+			localEndpointCount++
+		}
+	}
+
+	// No local endpoint found.
+	if localEndpointCount == 0 {
+		return serverAddr, endpoints, setupType, fmt.Errorf("no endpoint found for this host")
+	}
+
+	// Check whether same path is not used in endpoints of a host.
+	{
+		pathIPMap := make(map[string]set.StringSet)
+		for _, endpoint := range endpoints {
+			var host string
+			host, _, err = net.SplitHostPort(endpoint.Host)
+			if err != nil {
+				host = endpoint.Host
+			}
+			hostIPSet, _ := getHostIP4(host)
+			if IPSet, ok := pathIPMap[endpoint.Path]; ok {
+				if !IPSet.Intersection(hostIPSet).IsEmpty() {
+					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
+			}
+		}
+	}
+
+	// Check whether serverAddrPort matches at least in one of port used in local endpoints.
+	{
+		if !localPortSet.Contains(serverAddrPort) {
+			if len(localPortSet) > 1 {
+				err = fmt.Errorf("port number in server address must match with one of the port in local endpoints")
+			} else {
+				err = fmt.Errorf("server address and local endpoint have different ports")
+			}
+
+			return serverAddr, endpoints, setupType, err
+		}
+	}
+
+	// All endpoints are pointing to local host
+	if len(endpoints) == localEndpointCount {
+		// If all endpoints have same port number, then this is XL setup using URL style endpoints.
+		if len(localPortSet) == 1 {
+			if len(localServerAddrSet) > 1 {
+				// TODO: Eventhough all endpoints are local, the local host is referred by different IP/name.
+				// eg '172.0.0.1', 'localhost' and 'mylocalhostname' point to same local host.
+				//
+				// In this case, we bind to 0.0.0.0 ie to all interfaces.
+				// The actual way to do is bind to only IPs in uniqueLocalHosts.
+				serverAddr = net.JoinHostPort("", serverAddrPort)
+			}
+
+			endpointPaths := endpointPathSet.ToSlice()
+			endpoints, _ = NewEndpointList(endpointPaths...)
+			setupType = XLSetupType
+			return serverAddr, endpoints, setupType, nil
+		}
+
+		// Eventhough all endpoints are local, but those endpoints use different ports.
+		// This means it is DistXL setup.
+	} else {
+		// This is DistXL setup.
+		// Check whether local server address are not 127.x.x.x
+		for _, localServerAddr := range localServerAddrSet.ToSlice() {
+			host, _, err := net.SplitHostPort(localServerAddr)
+			if err != nil {
+				host = localServerAddr
+			}
+
+			ipList, err := getHostIP4(host)
+			fatalIf(err, "unexpected error when resolving host '%s'", host)
+
+			// Filter ipList by IPs those start with '127.'.
+			loopBackIPs := ipList.FuncMatch(func(ip string, matchString string) bool {
+				return strings.HasPrefix(ip, "127.")
+			}, "")
+
+			// If loop back IP is found and ipList contains only loop back IPs, then error out.
+			if len(loopBackIPs) > 0 && len(loopBackIPs) == len(ipList) {
+				err = fmt.Errorf("'%s' resolves to loopback address is not allowed for distributed XL", localServerAddr)
+				return serverAddr, endpoints, setupType, err
+			}
+		}
+	}
+
+	// Add missing port in all endpoints.
+	for i := range endpoints {
+		_, port, err := net.SplitHostPort(endpoints[i].Host)
+		if err != nil {
+			endpoints[i].Host = net.JoinHostPort(endpoints[i].Host, serverAddrPort)
+		} else if endpoints[i].IsLocal && serverAddrPort != port {
+			// If endpoint is local, but port is different than serverAddrPort, then make it as remote.
+			endpoints[i].IsLocal = false
+		}
+	}
+
+	setupType = DistXLSetupType
+	return serverAddr, endpoints, setupType, nil
+}
+
+// GetRemotePeers - get hosts information other than this minio service.
+func GetRemotePeers(endpoints EndpointList) []string {
+	peerSet := set.NewStringSet()
+	for _, endpoint := range endpoints {
+		if endpoint.Type() != URLEndpointType {
+			continue
+		}
+
+		peer := endpoint.Host
+		if endpoint.IsLocal {
+			if _, port := mustSplitHostPort(peer); port == globalMinioPort {
+				continue
+			}
+		}
+
+		peerSet.Add(peer)
+	}
+
+	return peerSet.ToSlice()
+}
@@ -0,0 +1,371 @@
+/*
+ * 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"
+	"net/url"
+	"reflect"
+	"runtime"
+	"sort"
+	"strings"
+	"testing"
+)
+
+func TestNewEndpoint(t *testing.T) {
+	u1, _ := url.Parse("http://localhost/path")
+	u2, _ := url.Parse("https://example.org/path")
+	u3, _ := url.Parse("http://127.0.0.1:8080/path")
+	u4, _ := url.Parse("http://192.168.253.200/path")
+
+	errMsg := ": no such host"
+	if runtime.GOOS == "windows" {
+		errMsg = ": No such host is known."
+	}
+
+	testCases := []struct {
+		arg              string
+		expectedEndpoint Endpoint
+		expectedType     EndpointType
+		expectedErr      error
+	}{
+		{"foo", Endpoint{URL: &url.URL{Path: "foo"}, IsLocal: true}, PathEndpointType, nil},
+		{"/foo", Endpoint{URL: &url.URL{Path: "/foo"}, IsLocal: true}, PathEndpointType, nil},
+		{`\foo`, Endpoint{URL: &url.URL{Path: `\foo`}, IsLocal: true}, PathEndpointType, nil},
+		{"C", Endpoint{URL: &url.URL{Path: `C`}, IsLocal: true}, PathEndpointType, nil},
+		{"C:", Endpoint{URL: &url.URL{Path: `C:`}, IsLocal: true}, PathEndpointType, nil},
+		{"C:/", Endpoint{URL: &url.URL{Path: "C:"}, IsLocal: true}, PathEndpointType, nil},
+		{`C:\`, Endpoint{URL: &url.URL{Path: `C:\`}, IsLocal: true}, PathEndpointType, nil},
+		{`C:\foo`, Endpoint{URL: &url.URL{Path: `C:\foo`}, IsLocal: true}, PathEndpointType, nil},
+		{"C:/foo", Endpoint{URL: &url.URL{Path: "C:/foo"}, IsLocal: true}, PathEndpointType, nil},
+		{`C:\\foo`, Endpoint{URL: &url.URL{Path: `C:\\foo`}, IsLocal: true}, PathEndpointType, nil},
+		{"http:path", Endpoint{URL: &url.URL{Path: "http:path"}, IsLocal: true}, PathEndpointType, nil},
+		{"http:/path", Endpoint{URL: &url.URL{Path: "http:/path"}, IsLocal: true}, PathEndpointType, nil},
+		{"http:///path", Endpoint{URL: &url.URL{Path: "http:/path"}, IsLocal: true}, PathEndpointType, nil},
+		{"http://localhost/path", Endpoint{URL: u1, IsLocal: true}, URLEndpointType, nil},
+		{"http://localhost/path//", Endpoint{URL: u1, IsLocal: true}, URLEndpointType, nil},
+		{"https://example.org/path", Endpoint{URL: u2}, URLEndpointType, nil},
+		{"http://127.0.0.1:8080/path", Endpoint{URL: u3, IsLocal: true}, URLEndpointType, nil},
+		{"http://192.168.253.200/path", Endpoint{URL: u4}, URLEndpointType, nil},
+		{"", Endpoint{}, -1, fmt.Errorf("empty or root endpoint is not supported")},
+		{"/", Endpoint{}, -1, fmt.Errorf("empty or root endpoint is not supported")},
+		{`\`, Endpoint{}, -1, fmt.Errorf("empty or root endpoint is not supported")},
+		{"c://foo", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
+		{"ftp://foo", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
+		{"http://server/path?location", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
+		{"http://:/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: invalid port number")},
+		{"http://:8080/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: empty host name")},
+		{"http://server:/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: invalid port number")},
+		{"https://93.184.216.34:808080/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: port number must be between 1 to 65535")},
+		{"http://server:8080//", Endpoint{}, -1, fmt.Errorf("empty or root path is not supported in URL endpoint")},
+		{"http://server:8080/", Endpoint{}, -1, fmt.Errorf("empty or root path is not supported in URL endpoint")},
+		{"http://server/path", Endpoint{}, -1, fmt.Errorf("lookup server" + errMsg)},
+	}
+
+	for _, testCase := range testCases {
+		endpoint, err := NewEndpoint(testCase.arg)
+		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 {
+			var match bool
+			if strings.HasSuffix(testCase.expectedErr.Error(), errMsg) {
+				match = strings.HasSuffix(err.Error(), errMsg)
+			} else {
+				match = (testCase.expectedErr.Error() == err.Error())
+			}
+			if !match {
+				t.Fatalf("error: expected = %v, got = %v", testCase.expectedErr, err)
+			}
+		}
+
+		if err == nil && !reflect.DeepEqual(testCase.expectedEndpoint, endpoint) {
+			t.Fatalf("endpoint: expected = %+v, got = %+v", testCase.expectedEndpoint, endpoint)
+		}
+
+		if err == nil && testCase.expectedType != endpoint.Type() {
+			t.Fatalf("type: expected = %+v, got = %+v", testCase.expectedType, endpoint.Type())
+		}
+	}
+}
+
+func TestNewEndpointList(t *testing.T) {
+	testCases := []struct {
+		args        []string
+		expectedErr error
+	}{
+		{[]string{"d1", "d2", "d3", "d4"}, nil},
+		{[]string{"/d1", "/d2", "/d3", "/d4"}, nil},
+		{[]string{"http://localhost/d1", "http://localhost/d2", "http://localhost/d3", "http://localhost/d4"}, nil},
+		{[]string{"http://example.org/d1", "http://example.com/d1", "http://example.net/d1", "http://example.edu/d1"}, nil},
+		{[]string{"http://localhost/d1", "http://localhost/d2", "http://example.org/d1", "http://example.org/d2"}, nil},
+		{[]string{"https://localhost:9000/d1", "https://localhost:9001/d2", "https://localhost:9002/d3", "https://localhost:9003/d4"}, nil},
+		// // It is valid WRT endpoint list that same path is expected with different port on same server.
+		{[]string{"https://127.0.0.1:9000/d1", "https://127.0.0.1:9001/d1", "https://127.0.0.1:9002/d1", "https://127.0.0.1:9003/d1"}, nil},
+		{[]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")},
+	}
+
+	for _, testCase := range testCases {
+		_, err := NewEndpointList(testCase.args...)
+		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)
+		}
+	}
+}
+
+func TestCreateEndpoints(t *testing.T) {
+	// Filter ipList by IPs those do not start with '127.'.
+	nonLoopBackIPs := localIP4.FuncMatch(func(ip string, matchString string) bool {
+		return !strings.HasPrefix(ip, "127.")
+	}, "")
+	if len(nonLoopBackIPs) == 0 {
+		t.Fatalf("No non-loop back IP address found for this host")
+	}
+	nonLoopBackIP := nonLoopBackIPs.ToSlice()[0]
+
+	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)
+			localFlags = append(localFlags, strings.HasPrefix(arg, prefix))
+		}
+
+		return URLs, localFlags
+	}
+
+	case1Endpoint1 := "http://" + nonLoopBackIP + "/d1"
+	case1Endpoint2 := "http://" + nonLoopBackIP + "/d2"
+	args := []string{
+		"http://" + nonLoopBackIP + ":10000/d1",
+		"http://" + nonLoopBackIP + ":10000/d2",
+		"http://example.com:10000/d4",
+		"http://example.org:10000/d3",
+	}
+	case1URLs, case1LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":10000/")
+
+	case2Endpoint1 := "http://" + nonLoopBackIP + "/d1"
+	case2Endpoint2 := "http://" + nonLoopBackIP + ":9000/d2"
+	args = []string{
+		"http://" + nonLoopBackIP + ":10000/d1",
+		"http://" + nonLoopBackIP + ":9000/d2",
+		"http://example.com:10000/d4",
+		"http://example.org:10000/d3",
+	}
+	case2URLs, case2LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":10000/")
+
+	case3Endpoint1 := "http://" + nonLoopBackIP + "/d1"
+	args = []string{
+		"http://" + nonLoopBackIP + ":80/d1",
+		"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.com:9000/d3",
+		"http://example.net:9000/d4",
+		"http://example.org:9000/d2",
+	}
+	case4URLs, case4LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":9000/")
+
+	case5Endpoint1 := "http://" + nonLoopBackIP + ":9000/d1"
+	case5Endpoint2 := "http://" + nonLoopBackIP + ":9001/d2"
+	case5Endpoint3 := "http://" + nonLoopBackIP + ":9002/d3"
+	case5Endpoint4 := "http://" + nonLoopBackIP + ":9003/d4"
+	args = []string{
+		case5Endpoint1,
+		case5Endpoint2,
+		case5Endpoint3,
+		case5Endpoint4,
+	}
+	case5URLs, case5LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":9000/")
+
+	case6Endpoint := "http://" + nonLoopBackIP + ":9003/d4"
+	args = []string{
+		"http://localhost:9000/d1",
+		"http://localhost:9001/d2",
+		"http://127.0.0.1:9002/d3",
+		case6Endpoint,
+	}
+	case6URLs, case6LocalFlags := getExpectedEndpoints(args, "http://"+nonLoopBackIP+":9003/")
+
+	testCases := []struct {
+		serverAddr         string
+		args               []string
+		expectedServerAddr string
+		expectedEndpoints  EndpointList
+		expectedSetupType  SetupType
+		expectedErr        error
+	}{
+		{"localhost", []string{}, "", EndpointList{}, -1, fmt.Errorf("missing port in address localhost")},
+
+		// 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")},
+
+		// XL Setup with PathEndpointType
+		{":1234", []string{"/d1", "/d2", "d3", "d4"}, ":1234",
+			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
+		{":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{
+			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")},
+
+		{":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{
+			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{
+			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{
+			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{
+			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{
+			Endpoint{URL: case5URLs[0], IsLocal: case5LocalFlags[0]},
+			Endpoint{URL: case5URLs[1], IsLocal: case5LocalFlags[1]},
+			Endpoint{URL: case5URLs[2], IsLocal: case5LocalFlags[2]},
+			Endpoint{URL: case5URLs[3], IsLocal: case5LocalFlags[3]},
+		}, 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{
+			Endpoint{URL: case6URLs[0], IsLocal: case6LocalFlags[0]},
+			Endpoint{URL: case6URLs[1], IsLocal: case6LocalFlags[1]},
+			Endpoint{URL: case6URLs[2], IsLocal: case6LocalFlags[2]},
+			Endpoint{URL: case6URLs[3], IsLocal: case6LocalFlags[3]},
+		}, DistXLSetupType, nil},
+	}
+
+	for _, testCase := range testCases {
+		serverAddr, endpoints, setupType, err := CreateEndpoints(testCase.serverAddr, testCase.args...)
+
+		if err == nil {
+			if testCase.expectedErr != nil {
+				t.Fatalf("error: expected = %v, got = <nil>", testCase.expectedErr)
+			} else {
+				if serverAddr != testCase.expectedServerAddr {
+					t.Fatalf("serverAddr: expected = %v, got = %v", testCase.expectedServerAddr, serverAddr)
+				}
+				if !reflect.DeepEqual(endpoints, testCase.expectedEndpoints) {
+					t.Fatalf("endpoints: expected = %v, got = %v", testCase.expectedEndpoints, endpoints)
+				}
+				if setupType != testCase.expectedSetupType {
+					t.Fatalf("setupType: expected = %v, got = %v", testCase.expectedSetupType, setupType)
+				}
+			}
+		} else if testCase.expectedErr == nil {
+			t.Fatalf("error: expected = <nil>, got = %v", err)
+		} else if err.Error() != testCase.expectedErr.Error() {
+			t.Fatalf("error: expected = %v, got = %v", testCase.expectedErr, err)
+		}
+	}
+}
+
+func TestGetRemotePeers(t *testing.T) {
+	tempGlobalMinioPort := globalMinioPort
+	defer func() {
+		globalMinioPort = tempGlobalMinioPort
+	}()
+	globalMinioPort = "9000"
+
+	testCases := []struct {
+		endpointArgs   []string
+		expectedResult []string
+	}{
+		{[]string{"/d1", "/d2", "d3", "d4"}, []string{}},
+		{[]string{"http://localhost:9000/d1", "http://localhost:9000/d2", "http://example.org:9000/d3", "http://example.com:9000/d4"}, []string{"example.com:9000", "example.org:9000"}},
+		{[]string{"http://localhost:9000/d1", "http://localhost:10000/d2", "http://example.org:9000/d3", "http://example.com:9000/d4"}, []string{"example.com:9000", "example.org:9000", "localhost:10000"}},
+		{[]string{"http://localhost:9000/d1", "http://example.org:9000/d2", "http://example.com:9000/d3", "http://example.net:9000/d4"}, []string{"example.com:9000", "example.net:9000", "example.org:9000"}},
+		{[]string{"http://localhost:9000/d1", "http://localhost:9001/d2", "http://localhost:9002/d3", "http://localhost:9003/d4"}, []string{"localhost:9001", "localhost:9002", "localhost:9003"}},
+	}
+
+	for _, testCase := range testCases {
+		endpoints, _ := NewEndpointList(testCase.endpointArgs...)
+		remotePeers := GetRemotePeers(endpoints)
+		if !reflect.DeepEqual(remotePeers, testCase.expectedResult) {
+			t.Fatalf("expected: %v, got: %v", testCase.expectedResult, remotePeers)
+		}
+	}
+}
@@ -28,7 +28,9 @@ import (
 // erasureCreateFile - writes an entire stream by erasure coding to
 // all the disks, writes also calculate individual block's checksum
 // for future bit-rot protection.
-func erasureCreateFile(disks []StorageAPI, volume, path string, reader io.Reader, allowEmpty bool, blockSize int64, dataBlocks int, parityBlocks int, algo string, writeQuorum int) (bytesWritten int64, checkSums []string, err error) {
+func erasureCreateFile(disks []StorageAPI, volume, path string, reader io.Reader, allowEmpty bool, blockSize int64,
+	dataBlocks, parityBlocks int, algo HashAlgo, writeQuorum int) (bytesWritten int64, checkSums []string, err error) {
+
 	// Allocated blockSized buffer for reading from incoming stream.
 	buf := make([]byte, blockSize)

@@ -19,7 +19,9 @@ package cmd
 import "encoding/hex"

 // Heals the erasure coded file. reedsolomon.Reconstruct() is used to reconstruct the missing parts.
-func erasureHealFile(latestDisks []StorageAPI, outDatedDisks []StorageAPI, volume, path, healBucket, healPath string, size int64, blockSize int64, dataBlocks int, parityBlocks int, algo string) (checkSums []string, err error) {
+func erasureHealFile(latestDisks []StorageAPI, outDatedDisks []StorageAPI, volume, path, healBucket, healPath string,
+	size, blockSize int64, dataBlocks, parityBlocks int, algo HashAlgo) (checkSums []string, err error) {
+
 	var offset int64
 	remainingSize := size

@@ -17,7 +17,6 @@
 package cmd

 import (
-	"encoding/hex"
 	"errors"
 	"io"
 	"sync"
@@ -111,7 +110,9 @@ func getReadDisks(orderedDisks []StorageAPI, index int, dataBlocks int) (readDis
 }

 // parallelRead - reads chunks in parallel from the disks specified in []readDisks.
-func parallelRead(volume, path string, readDisks []StorageAPI, orderedDisks []StorageAPI, enBlocks [][]byte, blockOffset int64, curChunkSize int64, bitRotVerify func(diskIndex int) bool, pool *bpool.BytePool) {
+func parallelRead(volume, path string, readDisks, orderedDisks []StorageAPI, enBlocks [][]byte,
+	blockOffset, curChunkSize int64, brVerifiers []bitRotVerifier, pool *bpool.BytePool) {
+
 	// WaitGroup to synchronise the read go-routines.
 	wg := &sync.WaitGroup{}

@@ -125,11 +126,15 @@ func parallelRead(volume, path string, readDisks []StorageAPI, orderedDisks []St
 		go func(index int) {
 			defer wg.Done()

-			// Verify bit rot for the file on this disk.
-			if !bitRotVerify(index) {
-				// So that we don't read from this disk for the next block.
-				orderedDisks[index] = nil
-				return
+			// evaluate if we need to perform bit-rot checking
+			needBitRotVerification := true
+			if brVerifiers[index].isVerified {
+				needBitRotVerification = false
+				// if file has bit-rot, do not reuse disk
+				if brVerifiers[index].hasBitRot {
+					orderedDisks[index] = nil
+					return
+				}
 			}

 			buf, err := pool.Get()
@@ -140,7 +145,25 @@ func parallelRead(volume, path string, readDisks []StorageAPI, orderedDisks []St
 			}
 			buf = buf[:curChunkSize]

-			_, err = readDisks[index].ReadFile(volume, path, blockOffset, buf)
+			if needBitRotVerification {
+				_, err = readDisks[index].ReadFileWithVerify(
+					volume, path, blockOffset, buf,
+					brVerifiers[index].algo,
+					brVerifiers[index].checkSum)
+			} else {
+				_, err = readDisks[index].ReadFile(volume, path,
+					blockOffset, buf)
+			}
+
+			// if bit-rot verification was done, store the
+			// result of verification so we can skip
+			// re-doing it next time
+			if needBitRotVerification {
+				brVerifiers[index].isVerified = true
+				_, ok := err.(hashMismatchError)
+				brVerifiers[index].hasBitRot = ok
+			}
+
 			if err != nil {
 				orderedDisks[index] = nil
 				return
@@ -153,12 +176,16 @@ func parallelRead(volume, path string, readDisks []StorageAPI, orderedDisks []St
 	wg.Wait()
 }

-// erasureReadFile - read bytes from erasure coded files and writes to given writer.
-// Erasure coded files are read block by block as per given erasureInfo and data chunks
-// are decoded into a data block. Data block is trimmed for given offset and length,
-// then written to given writer. This function also supports bit-rot detection by
-// verifying checksum of individual block's checksum.
-func erasureReadFile(writer io.Writer, disks []StorageAPI, volume string, path string, offset int64, length int64, totalLength int64, blockSize int64, dataBlocks int, parityBlocks int, checkSums []string, algo string, pool *bpool.BytePool) (int64, error) {
+// erasureReadFile - read bytes from erasure coded files and writes to
+// given writer.  Erasure coded files are read block by block as per
+// given erasureInfo and data chunks are decoded into a data
+// block. Data block is trimmed for given offset and length, then
+// written to given writer. This function also supports bit-rot
+// detection by verifying checksum of individual block's checksum.
+func erasureReadFile(writer io.Writer, disks []StorageAPI, volume, path string,
+	offset, length, totalLength, blockSize int64, dataBlocks, parityBlocks int,
+	checkSums []string, algo HashAlgo, pool *bpool.BytePool) (int64, error) {
+
 	// Offset and length cannot be negative.
 	if offset < 0 || length < 0 {
 		return 0, traceError(errUnexpected)
@@ -169,27 +196,15 @@ func erasureReadFile(writer io.Writer, disks []StorageAPI, volume string, path s
 		return 0, traceError(errUnexpected)
 	}

-	// chunkSize is the amount of data that needs to be read from each disk at a time.
+	// chunkSize is the amount of data that needs to be read from
+	// each disk at a time.
 	chunkSize := getChunkSize(blockSize, dataBlocks)

-	// bitRotVerify verifies if the file on a particular disk doesn't have bitrot
-	// by verifying the hash of the contents of the file.
-	bitRotVerify := func() func(diskIndex int) bool {
-		verified := make([]bool, len(disks))
-		// Return closure so that we have reference to []verified and
-		// not recalculate the hash on it every time the function is
-		// called for the same disk.
-		return func(diskIndex int) bool {
-			if verified[diskIndex] {
-				// Already validated.
-				return true
-			}
-			// Is this a valid block?
-			isValid := isValidBlock(disks[diskIndex], volume, path, checkSums[diskIndex], algo)
-			verified[diskIndex] = isValid
-			return isValid
-		}
-	}()
+	brVerifiers := make([]bitRotVerifier, len(disks))
+	for i := range brVerifiers {
+		brVerifiers[i].algo = algo
+		brVerifiers[i].checkSum = checkSums[i]
+	}

 	// Total bytes written to writer
 	var bytesWritten int64
@@ -241,7 +256,7 @@ func erasureReadFile(writer io.Writer, disks []StorageAPI, volume string, path s
 				return bytesWritten, err
 			}
 			// Issue a parallel read across the disks specified in readDisks.
-			parallelRead(volume, path, readDisks, disks, enBlocks, blockOffset, curChunkSize, bitRotVerify, pool)
+			parallelRead(volume, path, readDisks, disks, enBlocks, blockOffset, curChunkSize, brVerifiers, pool)
 			if isSuccessDecodeBlocks(enBlocks, dataBlocks) {
 				// If enough blocks are available to do rs.Reconstruct()
 				break
@@ -299,27 +314,6 @@ func erasureReadFile(writer io.Writer, disks []StorageAPI, volume string, path s
 	return bytesWritten, nil
 }

-// isValidBlock - calculates the checksum hash for the block and
-// validates if its correct returns true for valid cases, false otherwise.
-func isValidBlock(disk StorageAPI, volume, path, checkSum, checkSumAlgo string) (ok bool) {
-	// Disk is not available, not a valid block.
-	if disk == nil {
-		return false
-	}
-	// Checksum not available, not a valid block.
-	if checkSum == "" {
-		return false
-	}
-	// Read everything for a given block and calculate hash.
-	hashWriter := newHash(checkSumAlgo)
-	hashBytes, err := hashSum(disk, volume, path, hashWriter)
-	if err != nil {
-		errorIf(err, "Unable to calculate checksum %s/%s", volume, path)
-		return false
-	}
-	return hex.EncodeToString(hashBytes) == checkSum
-}
-
 // decodeData - decode encoded blocks.
 func decodeData(enBlocks [][]byte, dataBlocks, parityBlocks int) error {
 	// Initialized reedsolomon.
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"math/rand"
 	"testing"
-	"time"

 	"reflect"

@@ -195,11 +194,7 @@ func TestErasureReadUtils(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	objLayer, _, err := initObjectLayer(endpoints)
+	objLayer, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		removeRoots(disks)
 		t.Fatal(err)
@@ -218,6 +213,12 @@ func (r ReadDiskDown) ReadFile(volume string, path string, offset int64, buf []b
 	return 0, errFaultyDisk
 }

+func (r ReadDiskDown) ReadFileWithVerify(volume string, path string, offset int64, buf []byte,
+	algo HashAlgo, expectedHash string) (n int64, err error) {
+
+	return 0, errFaultyDisk
+}
+
 func TestErasureReadFileDiskFail(t *testing.T) {
 	// Initialize environment needed for the test.
 	dataBlocks := 7
@@ -412,7 +413,7 @@ func TestErasureReadFileRandomOffsetLength(t *testing.T) {
 	}

 	// To generate random offset/length.
-	r := rand.New(rand.NewSource(time.Now().UTC().UnixNano()))
+	r := rand.New(rand.NewSource(UTCNow().UnixNano()))

 	// create pool buffer which will be used by erasureReadFile for
 	// reading from disks and erasure decoding.
@@ -29,7 +29,7 @@ import (
 )

 // newHashWriters - inititialize a slice of hashes for the disk count.
-func newHashWriters(diskCount int, algo string) []hash.Hash {
+func newHashWriters(diskCount int, algo HashAlgo) []hash.Hash {
 	hashWriters := make([]hash.Hash, diskCount)
 	for index := range hashWriters {
 		hashWriters[index] = newHash(algo)
@@ -38,13 +38,13 @@ func newHashWriters(diskCount int, algo string) []hash.Hash {
 }

 // newHash - gives you a newly allocated hash depending on the input algorithm.
-func newHash(algo string) (h hash.Hash) {
+func newHash(algo HashAlgo) (h hash.Hash) {
 	switch algo {
-	case sha256Algo:
+	case HashSha256:
 		// sha256 checksum specially on ARM64 platforms or whenever
 		// requested as dictated by `xl.json` entry.
 		h = sha256.New()
-	case blake2bAlgo:
+	case HashBlake2b:
 		// ignore the error, because New512 without a key never fails
 		// New512 only returns a non-nil error, if the length of the passed
 		// key > 64 bytes - but we use blake2b as hash function (no key)
@@ -71,7 +71,7 @@ var hashBufferPool = sync.Pool{

 // hashSum calculates the hash of the entire path and returns.
 func hashSum(disk StorageAPI, volume, path string, writer hash.Hash) ([]byte, error) {
-	// Fetch staging a new staging buffer from the pool.
+	// Fetch a new staging buffer from the pool.
 	bufp := hashBufferPool.Get().(*[]byte)
 	defer hashBufferPool.Put(bufp)

@@ -207,3 +207,16 @@ func copyBuffer(writer io.Writer, disk StorageAPI, volume string, path string, b
 	// Success.
 	return nil
 }
+
+// bitRotVerifier - type representing bit-rot verification process for
+// a single under-lying object (currently whole files)
+type bitRotVerifier struct {
+	// has the bit-rot verification been done?
+	isVerified bool
+	// is the data free of bit-rot?
+	hasBitRot bool
+	// hashing algorithm
+	algo HashAlgo
+	// hex-encoded expected raw-hash value
+	checkSum string
+}
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -25,11 +25,14 @@ import (
 	"net/url"
 	"path"
 	"sync"
-	"time"

 	"github.com/Sirupsen/logrus"
 )

+const (
+	minioEventSource = "minio:s3"
+)
+
 type externalNotifier struct {
 	// Per-bucket notification config. This is updated via
 	// PutBucketNotification API.
@@ -83,11 +86,29 @@ type eventData struct {
 	Bucket    string
 	ObjInfo   ObjectInfo
 	ReqParams map[string]string
+	Host      string
+	Port      string
+	UserAgent string
 }

 // New notification event constructs a new notification event message from
 // input request metadata which completed successfully.
 func newNotificationEvent(event eventData) NotificationEvent {
+	getResponseOriginEndpointKey := func() string {
+		host := globalMinioHost
+		if host == "" {
+			// FIXME: Send FQDN or hostname of this machine than sending IP address.
+			host = localIP4.ToSlice()[0]
+		}
+
+		scheme := httpScheme
+		if globalIsSSL {
+			scheme = httpsScheme
+		}
+
+		return fmt.Sprintf("%s://%s:%s", scheme, host, globalMinioPort)
+	}
+
 	// Fetch the region.
 	region := serverConfig.GetRegion()

@@ -95,15 +116,7 @@ func newNotificationEvent(event eventData) NotificationEvent {
 	creds := serverConfig.GetCredential()

 	// Time when Minio finished processing the request.
-	eventTime := time.Now().UTC()
-
-	// API endpoint is captured here to be returned back
-	// to the client for it to differentiate from which
-	// server the request came from.
-	var apiEndpoint string
-	if len(globalAPIEndpoints) >= 1 {
-		apiEndpoint = globalAPIEndpoints[0]
-	}
+	eventTime := UTCNow()

 	// Fetch a hexadecimal representation of event time in nano seconds.
 	uniqueID := mustGetRequestID(eventTime)
@@ -115,7 +128,7 @@ func newNotificationEvent(event eventData) NotificationEvent {
 	// http://docs.aws.amazon.com/AmazonS3/latest/dev/notification-content-structure.html
 	nEvent := NotificationEvent{
 		EventVersion:      eventVersion,
-		EventSource:       eventSource,
+		EventSource:       minioEventSource,
 		AwsRegion:         region,
 		EventTime:         eventTime.Format(timeFormatAMZ),
 		EventName:         event.Type.String(),
@@ -125,7 +138,7 @@ func newNotificationEvent(event eventData) NotificationEvent {
 			responseRequestIDKey: uniqueID,
 			// Following is a custom response element to indicate
 			// event origin server endpoint.
-			responseOriginEndpointKey: apiEndpoint,
+			responseOriginEndpointKey: getResponseOriginEndpointKey(),
 		},
 		S3: eventMeta{
 			SchemaVersion:   eventSchemaVersion,
@@ -136,6 +149,11 @@ func newNotificationEvent(event eventData) NotificationEvent {
 				ARN:           bucketARNPrefix + event.Bucket,
 			},
 		},
+		Source: sourceInfo{
+			Host:      event.Host,
+			Port:      event.Port,
+			UserAgent: event.UserAgent,
+		},
 	}

 	// Escape the object name. For example "red flower.jpg" becomes "red+flower.jpg".
@@ -145,6 +163,7 @@ func newNotificationEvent(event eventData) NotificationEvent {
 	if event.Type == ObjectRemovedDelete {
 		nEvent.S3.Object = objectMeta{
 			Key:       escapedObj,
+			VersionID: "1",
 			Sequencer: uniqueID,
 		}
 		return nEvent
@@ -152,10 +171,13 @@ func newNotificationEvent(event eventData) NotificationEvent {

 	// For all other events we should set ETag and Size.
 	nEvent.S3.Object = objectMeta{
-		Key:       escapedObj,
-		ETag:      event.ObjInfo.MD5Sum,
-		Size:      event.ObjInfo.Size,
-		Sequencer: uniqueID,
+		Key:         escapedObj,
+		ETag:        event.ObjInfo.ETag,
+		Size:        event.ObjInfo.Size,
+		ContentType: event.ObjInfo.ContentType,
+		UserDefined: event.ObjInfo.UserDefined,
+		VersionID:   "1",
+		Sequencer:   uniqueID,
 	}

 	// Success.
@@ -630,7 +652,6 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 		if !webhookN.Enable {
 			continue
 		}
-
 		if _, err := addQueueTarget(queueTargets, accountID, queueTypeWebhook, newWebhookNotify); err != nil {
 			return nil, err
 		}
@@ -674,6 +695,25 @@ func loadAllQueueTargets() (map[string]*logrus.Logger, error) {
 		}
 	}

+	// Load MySQL targets, initialize their respective loggers.
+	for accountID, msqlN := range serverConfig.Notify.GetMySQL() {
+		if !msqlN.Enable {
+			continue
+		}
+
+		if queueARN, err := addQueueTarget(queueTargets, accountID, queueTypeMySQL, newMySQLNotify); err != nil {
+			if _, ok := err.(net.Error); ok {
+				err = &net.OpError{
+					Op:  "Connecting to " + queueARN,
+					Net: "tcp",
+					Err: err,
+				}
+			}
+
+			return nil, err
+		}
+	}
+
 	// Load Kafka targets, initialize their respective loggers.
 	for accountID, kafkaN := range serverConfig.Notify.GetKafka() {
 		if !kafkaN.Enable {
@@ -19,7 +19,6 @@ package cmd
 import (
 	"bytes"
 	"fmt"
-	"net"
 	"reflect"
 	"testing"
 	"time"
@@ -40,17 +39,13 @@ func TestInitEventNotifierFaultyDisks(t *testing.T) {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
 	defer removeRoots(disks)
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}

 	bucketName := "bucket"
-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Unexpected error:", err)
 	}

@@ -97,11 +92,7 @@ func TestInitEventNotifierWithPostgreSQL(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	fs, _, err := initObjectLayer(endpoints)
+	fs, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
@@ -128,11 +119,7 @@ func TestInitEventNotifierWithNATS(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	fs, _, err := initObjectLayer(endpoints)
+	fs, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
@@ -159,11 +146,7 @@ func TestInitEventNotifierWithWebHook(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	fs, _, err := initObjectLayer(endpoints)
+	fs, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
@@ -190,11 +173,7 @@ func TestInitEventNotifierWithAMQP(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	fs, _, err := initObjectLayer(endpoints)
+	fs, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
@@ -221,11 +200,7 @@ func TestInitEventNotifierWithElasticSearch(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	fs, _, err := initObjectLayer(endpoints)
+	fs, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
@@ -252,11 +227,7 @@ func TestInitEventNotifierWithRedis(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unable to create directories for FS backend. ", err)
 	}
-	endpoints, err := parseStorageEndpoints(disks)
-	if err != nil {
-		t.Fatal(err)
-	}
-	fs, _, err := initObjectLayer(endpoints)
+	fs, _, err := initObjectLayer(mustGetNewEndpointList(disks...))
 	if err != nil {
 		t.Fatal("Unable to initialize FS backend.", err)
 	}
@@ -276,15 +247,10 @@ func (s *TestPeerRPCServerData) Setup(t *testing.T) {
 	s.testServer = StartTestPeersRPCServer(t, s.serverType)

 	// setup port and minio addr
-	host, port, err := net.SplitHostPort(s.testServer.Server.Listener.Addr().String())
-	if err != nil {
-		t.Fatalf("Initialisation error: %v", err)
-	}
+	host, port := mustSplitHostPort(s.testServer.Server.Listener.Addr().String())
 	globalMinioHost = host
 	globalMinioPort = port
-	globalMinioAddr = getLocalAddress(
-		s.testServer.SrvCmdCfg,
-	)
+	globalMinioAddr = getEndpointsLocalAddr(s.testServer.endpoints)

 	// initialize the peer client(s)
 	initGlobalS3Peers(s.testServer.Disks)
@@ -377,7 +343,7 @@ func TestInitEventNotifier(t *testing.T) {
 	}

 	// create bucket
-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Unexpected error:", err)
 	}

@@ -442,7 +408,7 @@ func TestListenBucketNotification(t *testing.T) {
 	objectName := "object"

 	// Create the bucket to listen on
-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Unexpected error:", err)
 	}

@@ -552,12 +518,12 @@ func TestAddRemoveBucketListenerConfig(t *testing.T) {

 	// Make a bucket to store topicConfigs.
 	randBucket := getRandomBucketName()
-	if err := obj.MakeBucket(randBucket); err != nil {
+	if err := obj.MakeBucketWithLocation(randBucket, ""); err != nil {
 		t.Fatalf("Failed to make bucket %s", randBucket)
 	}

 	// Add a topicConfig to an empty notificationConfig.
-	accountID := fmt.Sprintf("%d", time.Now().UTC().UnixNano())
+	accountID := fmt.Sprintf("%d", UTCNow().UnixNano())
 	accountARN := fmt.Sprintf(
 		"arn:minio:sqs:%s:%s:listen-%s",
 		serverConfig.GetRegion(),
@@ -0,0 +1,86 @@
+/*
+ * 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
+}
@@ -20,8 +20,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
+	"io/ioutil"
 	"reflect"
 	"sync"
+
+	"github.com/minio/minio/pkg/lock"
 )

 // fsFormat - structure holding 'fs' format.
@@ -29,6 +33,15 @@ 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.
@@ -38,6 +51,15 @@ type xlFormat struct {
 	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.
@@ -47,6 +69,120 @@ type formatConfigV1 struct {
 	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
@@ -768,31 +904,39 @@ func loadFormatXL(bootstrapDisks []StorageAPI, readQuorum int) (disks []StorageA
 	return reorderDisks(bootstrapDisks, formatConfigs)
 }

-func checkFormatXLValues(formatConfigs []*formatConfigV1) error {
-	for _, formatXL := range formatConfigs {
-		if formatXL == nil {
-			continue
-		}
-		// Validate format version and format type.
-		if formatXL.Version != "1" {
-			return fmt.Errorf("Unsupported version of backend format [%s] found", formatXL.Version)
-		}
-		if formatXL.Format != "xl" {
-			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)
-		}
-		if len(formatConfigs) != len(formatXL.XL.JBOD) {
-			return fmt.Errorf("Number of disks %d did not match the backend format %d", len(formatConfigs), len(formatXL.XL.JBOD))
-		}
+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 {
+	if _, err := checkFormatXLValues(formatConfigs); err != nil {
 		return err
 	}
 	if err := checkJBODConsistency(formatConfigs); err != nil {
@@ -867,10 +1011,10 @@ func initFormatXL(storageDisks []StorageAPI) (err error) {
 		}
 		// Allocate format config.
 		formats[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    mustGetUUID(),
 			},
 		}
@@ -18,7 +18,12 @@ package cmd

 import (
 	"bytes"
+	"errors"
+	"os"
+	"path/filepath"
 	"testing"
+
+	"github.com/minio/minio/pkg/lock"
 )

 // generates a valid format.json for XL backend.
@@ -30,10 +35,10 @@ func genFormatXLValid() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -51,10 +56,10 @@ func genFormatXLInvalidVersion() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -75,10 +80,10 @@ func genFormatXLInvalidFormat() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -99,10 +104,10 @@ func genFormatXLInvalidXLVersion() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -116,8 +121,8 @@ func genFormatXLInvalidXLVersion() []*formatConfigV1 {

 func genFormatFS() *formatConfigV1 {
 	return &formatConfigV1{
-		Version: "1",
-		Format:  "fs",
+		Version: formatFileV1,
+		Format:  formatBackendFS,
 	}
 }

@@ -130,10 +135,10 @@ func genFormatXLInvalidJBODCount() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -151,10 +156,10 @@ func genFormatXLInvalidJBOD() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -178,10 +183,10 @@ func genFormatXLInvalidDisks() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -202,10 +207,10 @@ func genFormatXLInvalidDisksOrder() []*formatConfigV1 {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -223,7 +228,7 @@ func prepareFormatXLHealFreshDisks(obj ObjectLayer) ([]StorageAPI, error) {
 	var err error
 	xl := obj.(*xlObjects)

-	err = obj.MakeBucket("bucket")
+	err = obj.MakeBucketWithLocation("bucket", "")
 	if err != nil {
 		return []StorageAPI{}, err
 	}
@@ -240,10 +245,10 @@ func prepareFormatXLHealFreshDisks(obj ObjectLayer) ([]StorageAPI, error) {
 	// Remove the content of export dir 10 but preserve .minio.sys because it is automatically
 	// created when minio starts
 	for i := 3; i <= 5; i++ {
-		if err = xl.storageDisks[i].DeleteFile(".minio.sys", "format.json"); err != nil {
+		if err = xl.storageDisks[i].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 			return []StorageAPI{}, err
 		}
-		if err = xl.storageDisks[i].DeleteFile(".minio.sys", "tmp"); err != nil {
+		if err = xl.storageDisks[i].DeleteFile(minioMetaBucket, "tmp"); err != nil {
 			return []StorageAPI{}, err
 		}
 		if err = xl.storageDisks[i].DeleteFile(bucket, object+"/xl.json"); err != nil {
@@ -273,12 +278,8 @@ func TestFormatXLHealFreshDisks(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	endpoints, err := parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
 	// Create an instance of xl backend.
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Error(err)
 	}
@@ -309,12 +310,8 @@ func TestFormatXLHealFreshDisksErrorExpected(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	endpoints, err := parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
 	// Create an instance of xl backend.
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Error(err)
 	}
@@ -354,7 +351,7 @@ func TestFormatXLHealCorruptedDisks(t *testing.T) {

 	xl := obj.(*xlObjects)

-	err = obj.MakeBucket("bucket")
+	err = obj.MakeBucketWithLocation("bucket", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -369,19 +366,19 @@ func TestFormatXLHealCorruptedDisks(t *testing.T) {
 	}

 	// Now, remove two format files.. Load them and reorder
-	if err = xl.storageDisks[3].DeleteFile(".minio.sys", "format.json"); err != nil {
+	if err = xl.storageDisks[3].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 		t.Fatal(err)
 	}
-	if err = xl.storageDisks[11].DeleteFile(".minio.sys", "format.json"); err != nil {
+	if err = xl.storageDisks[11].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 		t.Fatal(err)
 	}

 	// Remove the content of export dir 10 but preserve .minio.sys because it is automatically
 	// created when minio starts
-	if err = xl.storageDisks[10].DeleteFile(".minio.sys", "format.json"); err != nil {
+	if err = xl.storageDisks[10].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 		t.Fatal(err)
 	}
-	if err = xl.storageDisks[10].DeleteFile(".minio.sys", "tmp"); err != nil {
+	if err = xl.storageDisks[10].DeleteFile(minioMetaBucket, "tmp"); err != nil {
 		t.Fatal(err)
 	}
 	if err = xl.storageDisks[10].DeleteFile(bucket, object+"/xl.json"); err != nil {
@@ -427,7 +424,7 @@ func TestFormatXLReorderByInspection(t *testing.T) {

 	xl := obj.(*xlObjects)

-	err = obj.MakeBucket("bucket")
+	err = obj.MakeBucketWithLocation("bucket", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -442,10 +439,10 @@ func TestFormatXLReorderByInspection(t *testing.T) {
 	}

 	// Now, remove two format files.. Load them and reorder
-	if err = xl.storageDisks[3].DeleteFile(".minio.sys", "format.json"); err != nil {
+	if err = xl.storageDisks[3].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 		t.Fatal(err)
 	}
-	if err = xl.storageDisks[5].DeleteFile(".minio.sys", "format.json"); err != nil {
+	if err = xl.storageDisks[5].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 		t.Fatal(err)
 	}

@@ -563,10 +560,10 @@ func TestSavedUUIDOrder(t *testing.T) {
 	}
 	for index := range jbod {
 		formatConfigs[index] = &formatConfigV1{
-			Version: "1",
-			Format:  "xl",
+			Version: formatFileV1,
+			Format:  formatBackendXL,
 			XL: &xlFormat{
-				Version: "1",
+				Version: xlFormatBackendV1,
 				Disk:    jbod[index],
 				JBOD:    jbod,
 			},
@@ -596,12 +593,8 @@ func TestInitFormatXLErrors(t *testing.T) {
 		t.Fatal(err)
 	}
 	defer removeRoots(fsDirs)
-	endpoints, err := parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
 	// Create an instance of xl backend.
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -694,6 +687,163 @@ func TestGenericFormatCheckXL(t *testing.T) {
 	}
 }

+// TestFSCheckFormatFSErr - test loadFormatFS loading older format.
+func TestFSCheckFormatFSErr(t *testing.T) {
+	// Prepare for testing
+	disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
+	defer removeAll(disk)
+
+	// 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)
+	}
+
+	testCases := []struct {
+		format         *formatConfigV1
+		formatWriteErr error
+		formatCheckErr error
+		shouldPass     bool
+	}{
+		{
+			format: &formatConfigV1{
+				Version: formatFileV1,
+				Format:  formatBackendFS,
+				FS: &fsFormat{
+					Version: fsFormatBackendV1,
+				},
+			},
+			formatCheckErr: nil,
+			shouldPass:     true,
+		},
+		{
+			format: &formatConfigV1{
+				Version: formatFileV1,
+				Format:  formatBackendFS,
+				FS: &fsFormat{
+					Version: "10",
+				},
+			},
+			formatCheckErr: errors.New("Unknown backend FS format version '10'"),
+			shouldPass:     false,
+		},
+		{
+			format: &formatConfigV1{
+				Version: formatFileV1,
+				Format:  "garbage",
+				FS: &fsFormat{
+					Version: fsFormatBackendV1,
+				},
+			},
+			formatCheckErr: errors.New("FS backend format required. Found 'garbage'"),
+		},
+		{
+			format: &formatConfigV1{
+				Version: "-1",
+				Format:  formatBackendFS,
+				FS: &fsFormat{
+					Version: fsFormatBackendV1,
+				},
+			},
+			formatCheckErr: errors.New("Unknown format file version '-1'"),
+		},
+	}
+
+	fsFormatPath := pathJoin(disk, minioMetaBucket, formatConfigFile)
+	for i, testCase := range testCases {
+		lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
+		if err != nil {
+			t.Fatal(err)
+		}
+		_, err = testCase.format.WriteTo(lk)
+		lk.Close()
+		if err != nil {
+			t.Fatalf("Test %d: Expected nil, got %s", i+1, err)
+		}
+
+		lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		formatCfg := &formatConfigV1{}
+		_, err = formatCfg.ReadFrom(lk)
+		lk.Close()
+		if err != nil {
+			t.Fatal(err)
+		}
+		err = formatCfg.CheckFS()
+		if err != nil && testCase.shouldPass {
+			t.Errorf("Test %d: Should not fail with unexpected %s, expected nil", i+1, err)
+		}
+		if err == nil && !testCase.shouldPass {
+			t.Errorf("Test %d: Should fail with expected %s, got nil", i+1, testCase.formatCheckErr)
+		}
+		if err != nil && !testCase.shouldPass {
+			if errorCause(err).Error() != testCase.formatCheckErr.Error() {
+				t.Errorf("Test %d: Should fail with expected %s, got %s", i+1, testCase.formatCheckErr, err)
+			}
+		}
+	}
+}
+
+// TestFSCheckFormatFS - test loadFormatFS with healty and faulty disks
+func TestFSCheckFormatFS(t *testing.T) {
+	// Prepare for testing
+	disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
+	defer removeAll(disk)
+
+	// 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)
+	}
+
+	fsFormatPath := pathJoin(disk, minioMetaBucket, formatConfigFile)
+	lk, err := lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	format := newFSFormatV1()
+	_, err = format.WriteTo(lk)
+	lk.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Loading corrupted format file
+	file, err := os.OpenFile(preparePath(fsFormatPath), os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0666)
+	if err != nil {
+		t.Fatal("Should not fail here", err)
+	}
+	file.Write([]byte{'b'})
+	file.Close()
+
+	lk, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	format = &formatConfigV1{}
+	_, err = format.ReadFrom(lk)
+	lk.Close()
+	if err == nil {
+		t.Fatal("Should return an error here")
+	}
+
+	// Loading format file from disk not found.
+	removeAll(disk)
+	_, err = lock.LockedOpenFile(preparePath(fsFormatPath), os.O_RDONLY, 0600)
+	if err != nil && !os.IsNotExist(err) {
+		t.Fatal("Should return 'format.json' does not exist, but got", err)
+	}
+}
+
 func TestLoadFormatXLErrs(t *testing.T) {
 	nDisks := 16
 	fsDirs, err := getRandomDisks(nDisks)
@@ -702,12 +852,8 @@ func TestLoadFormatXLErrs(t *testing.T) {
 	}
 	defer removeRoots(fsDirs)

-	endpoints, err := parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
 	// Create an instance of xl backend.
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -733,11 +879,7 @@ func TestLoadFormatXLErrs(t *testing.T) {
 	}
 	defer removeRoots(fsDirs)

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -761,11 +903,7 @@ func TestLoadFormatXLErrs(t *testing.T) {
 	}
 	defer removeRoots(fsDirs)

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -773,7 +911,7 @@ func TestLoadFormatXLErrs(t *testing.T) {

 	// disks 0..10 returns unformatted disk
 	for i := 0; i <= 10; i++ {
-		if err = xl.storageDisks[i].DeleteFile(".minio.sys", "format.json"); err != nil {
+		if err = xl.storageDisks[i].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 			t.Fatal(err)
 		}
 	}
@@ -787,11 +925,7 @@ func TestLoadFormatXLErrs(t *testing.T) {
 	}
 	defer removeRoots(fsDirs)

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -820,13 +954,8 @@ func TestHealFormatXLCorruptedDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err := parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Everything is fine, should return nil
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -842,13 +971,8 @@ func TestHealFormatXLCorruptedDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Disks 0..15 are nil
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -866,13 +990,8 @@ func TestHealFormatXLCorruptedDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// One disk returns Faulty Disk
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -892,13 +1011,8 @@ func TestHealFormatXLCorruptedDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// One disk is not found, heal corrupted disks should return nil
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -914,19 +1028,14 @@ func TestHealFormatXLCorruptedDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Remove format.json of all disks
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
 	xl = obj.(*xlObjects)
 	for i := 0; i <= 15; i++ {
-		if err = xl.storageDisks[i].DeleteFile(".minio.sys", "format.json"); err != nil {
+		if err = xl.storageDisks[i].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 			t.Fatal(err)
 		}
 	}
@@ -940,19 +1049,14 @@ func TestHealFormatXLCorruptedDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Corrupted format json in one disk
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
 	xl = obj.(*xlObjects)
 	for i := 0; i <= 15; i++ {
-		if err = xl.storageDisks[i].AppendFile(".minio.sys", "format.json", []byte("corrupted data")); err != nil {
+		if err = xl.storageDisks[i].AppendFile(minioMetaBucket, formatConfigFile, []byte("corrupted data")); err != nil {
 			t.Fatal(err)
 		}
 	}
@@ -976,13 +1080,8 @@ func TestHealFormatXLFreshDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err := parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Everything is fine, should return nil
-	obj, _, err := initObjectLayer(endpoints)
+	obj, _, err := initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -997,13 +1096,8 @@ func TestHealFormatXLFreshDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Disks 0..15 are nil
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1021,13 +1115,8 @@ func TestHealFormatXLFreshDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// One disk returns Faulty Disk
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1047,13 +1136,8 @@ func TestHealFormatXLFreshDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// One disk is not found, heal corrupted disks should return nil
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -1069,19 +1153,14 @@ func TestHealFormatXLFreshDisksErrs(t *testing.T) {
 		t.Fatal(err)
 	}

-	endpoints, err = parseStorageEndpoints(fsDirs)
-	if err != nil {
-		t.Fatal(err)
-	}
-
 	// Remove format.json of all disks
-	obj, _, err = initObjectLayer(endpoints)
+	obj, _, err = initObjectLayer(mustGetNewEndpointList(fsDirs...))
 	if err != nil {
 		t.Fatal(err)
 	}
 	xl = obj.(*xlObjects)
 	for i := 0; i <= 15; i++ {
-		if err = xl.storageDisks[i].DeleteFile(".minio.sys", "format.json"); err != nil {
+		if err = xl.storageDisks[i].DeleteFile(minioMetaBucket, formatConfigFile); err != nil {
 			t.Fatal(err)
 		}
 	}
@@ -20,6 +20,7 @@ import (
 	"io"
 	"os"
 	pathutil "path"
+	"runtime"
 )

 // Removes only the file at given path does not remove
@@ -122,18 +123,27 @@ func fsMkdir(dirPath string) (err error) {
 	return nil
 }

-// Lookup if directory exists, returns directory
-// attributes upon success.
-func fsStatDir(statDir string) (os.FileInfo, error) {
-	if statDir == "" {
+func fsStat(statLoc string) (os.FileInfo, error) {
+	if statLoc == "" {
 		return nil, traceError(errInvalidArgument)
 	}
-	if err := checkPathLength(statDir); err != nil {
+	if err := checkPathLength(statLoc); err != nil {
+		return nil, traceError(err)
+	}
+	fi, err := osStat(preparePath(statLoc))
+	if err != nil {
 		return nil, traceError(err)
 	}

-	fi, err := os.Stat(preparePath(statDir))
+	return fi, nil
+}
+
+// Lookup if directory exists, returns directory
+// attributes upon success.
+func fsStatDir(statDir string) (os.FileInfo, error) {
+	fi, err := fsStat(statDir)
 	if err != nil {
+		err = errorCause(err)
 		if os.IsNotExist(err) {
 			return nil, traceError(errVolumeNotFound)
 		} else if os.IsPermission(err) {
@@ -151,16 +161,9 @@ func fsStatDir(statDir string) (os.FileInfo, error) {

 // Lookup if file exists, returns file attributes upon success
 func fsStatFile(statFile string) (os.FileInfo, error) {
-	if statFile == "" {
-		return nil, traceError(errInvalidArgument)
-	}
-
-	if err := checkPathLength(statFile); err != nil {
-		return nil, traceError(err)
-	}
-
-	fi, err := os.Stat(preparePath(statFile))
+	fi, err := fsStat(statFile)
 	if err != nil {
+		err = errorCause(err)
 		if os.IsNotExist(err) {
 			return nil, traceError(errFileNotFound)
 		} else if os.IsPermission(err) {
@@ -173,7 +176,7 @@ func fsStatFile(statFile string) (os.FileInfo, error) {
 		return nil, traceError(err)
 	}
 	if fi.IsDir() {
-		return nil, traceError(errFileNotFound)
+		return nil, traceError(errFileAccessDenied)
 	}
 	return fi, nil
 }
@@ -205,7 +208,7 @@ func fsOpenFile(readPath string, offset int64) (io.ReadCloser, int64, error) {
 	}

 	// Stat to get the size of the file at path.
-	st, err := fr.Stat()
+	st, err := osStat(preparePath(readPath))
 	if err != nil {
 		return nil, 0, traceError(err)
 	}
@@ -229,7 +232,7 @@ func fsOpenFile(readPath string, offset int64) (io.ReadCloser, int64, error) {

 // Creates a file and copies data from incoming reader. Staging buffer is used by io.CopyBuffer.
 func fsCreateFile(filePath string, reader io.Reader, buf []byte, fallocSize int64) (int64, error) {
-	if filePath == "" || reader == nil || buf == nil {
+	if filePath == "" || reader == nil {
 		return 0, traceError(errInvalidArgument)
 	}

@@ -262,11 +265,18 @@ func fsCreateFile(filePath string, reader io.Reader, buf []byte, fallocSize int6
 		}
 	}

-	bytesWritten, err := io.CopyBuffer(writer, reader, buf)
-	if err != nil {
-		return 0, traceError(err)
+	var bytesWritten int64
+	if buf != nil {
+		bytesWritten, err = io.CopyBuffer(writer, reader, buf)
+		if err != nil {
+			return 0, traceError(err)
+		}
+	} else {
+		bytesWritten, err = io.Copy(writer, reader)
+		if err != nil {
+			return 0, traceError(err)
+		}
 	}
-
 	return bytesWritten, nil
 }

@@ -275,6 +285,12 @@ func fsRemoveUploadIDPath(basePath, uploadIDPath string) error {
 	if basePath == "" || uploadIDPath == "" {
 		return traceError(errInvalidArgument)
 	}
+	if err := checkPathLength(basePath); err != nil {
+		return traceError(err)
+	}
+	if err := checkPathLength(uploadIDPath); err != nil {
+		return traceError(err)
+	}

 	// List all the entries in uploadID.
 	entries, err := readDir(uploadIDPath)
@@ -318,6 +334,26 @@ func fsFAllocate(fd int, offset int64, len int64) (err error) {
 // Renames source path to destination path, creates all the
 // missing parents if they don't exist.
 func fsRenameFile(sourcePath, destPath string) error {
+	if err := checkPathLength(sourcePath); err != nil {
+		return traceError(err)
+	}
+	if err := checkPathLength(destPath); err != nil {
+		return traceError(err)
+	}
+	// Verify if source path exists.
+	if _, err := os.Stat(preparePath(sourcePath)); err != nil {
+		if os.IsNotExist(err) {
+			return traceError(errFileNotFound)
+		} else if os.IsPermission(err) {
+			return traceError(errFileAccessDenied)
+		} else if isSysErrPathNotFound(err) {
+			return traceError(errFileNotFound)
+		} else if isSysErrNotDir(err) {
+			// File path cannot be verified since one of the parents is a file.
+			return traceError(errFileAccessDenied)
+		}
+		return traceError(err)
+	}
 	if err := mkdirAll(pathutil.Dir(destPath), 0777); err != nil {
 		return traceError(err)
 	}
@@ -343,7 +379,7 @@ func fsDeleteFile(basePath, deletePath string) error {
 	}

 	// Verify if the path exists.
-	pathSt, err := os.Stat(preparePath(deletePath))
+	pathSt, err := osStat(preparePath(deletePath))
 	if err != nil {
 		if os.IsNotExist(err) {
 			return traceError(errFileNotFound)
@@ -377,3 +413,49 @@ func fsDeleteFile(basePath, deletePath string) error {

 	return nil
 }
+
+// fsRemoveMeta safely removes a locked file and takes care of Windows special case
+func fsRemoveMeta(basePath, deletePath, tmpDir string) error {
+	// Special case for windows please read through.
+	if runtime.GOOS == globalWindowsOSName {
+		// Ordinarily windows does not permit deletion or renaming of files still
+		// in use, but if all open handles to that file were opened with FILE_SHARE_DELETE
+		// then it can permit renames and deletions of open files.
+		//
+		// There are however some gotchas with this, and it is worth listing them here.
+		// Firstly, Windows never allows you to really delete an open file, rather it is
+		// flagged as delete pending and its entry in its directory remains visible
+		// (though no new file handles may be opened to it) and when the very last
+		// open handle to the file in the system is closed, only then is it truly
+		// deleted. Well, actually only sort of truly deleted, because Windows only
+		// appears to remove the file entry from the directory, but in fact that
+		// entry is merely hidden and actually still exists and attempting to create
+		// a file with the same name will return an access denied error. How long it
+		// silently exists for depends on a range of factors, but put it this way:
+		// if your code loops creating and deleting the same file name as you might
+		// when operating a lock file, you're going to see lots of random spurious
+		// access denied errors and truly dismal lock file performance compared to POSIX.
+		//
+		// We work-around these un-POSIX file semantics by taking a dual step to
+		// deleting files. Firstly, it renames the file to tmp location into multipartTmpBucket
+		// We always open files with FILE_SHARE_DELETE permission enabled, with that
+		// flag Windows permits renaming and deletion, and because the name was changed
+		// to a very random name somewhere not in its origin directory before deletion,
+		// you don't see those unexpected random errors when creating files with the
+		// same name as a recently deleted file as you do anywhere else on Windows.
+		// Because the file is probably not in its original containing directory any more,
+		// deletions of that directory will not fail with "directory not empty" as they
+		// otherwise normally would either.
+
+		tmpPath := pathJoin(tmpDir, mustGetUUID())
+
+		fsRenameFile(deletePath, tmpPath)
+
+		// Proceed to deleting the directory if empty
+		fsDeleteFile(basePath, pathutil.Dir(deletePath))
+
+		// Finally delete the renamed file.
+		return fsDeleteFile(tmpDir, tmpPath)
+	}
+	return fsDeleteFile(basePath, deletePath)
+}
@@ -18,9 +18,39 @@ package cmd

 import (
 	"bytes"
+	"io/ioutil"
+	"os"
+	"path"
 	"testing"
+
+	"github.com/minio/minio/pkg/lock"
 )

+func TestFSRenameFile(t *testing.T) {
+	// create posix test setup
+	_, path, err := newPosixTestSetup()
+	if err != nil {
+		t.Fatalf("Unable to create posix test setup, %s", err)
+	}
+	defer removeAll(path)
+
+	if err = fsMkdir(pathJoin(path, "testvolume1")); err != nil {
+		t.Fatal(err)
+	}
+	if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2")); err != nil {
+		t.Fatal(err)
+	}
+	if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2")); errorCause(err) != errFileNotFound {
+		t.Fatal(err)
+	}
+	if err = fsRenameFile(pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), pathJoin(path, "testvolume2")); errorCause(err) != errFileNameTooLong {
+		t.Fatal("Unexpected error", err)
+	}
+	if err = fsRenameFile(pathJoin(path, "testvolume1"), pathJoin(path, "my-obj-del-0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001")); errorCause(err) != errFileNameTooLong {
+		t.Fatal("Unexpected error", err)
+	}
+}
+
 func TestFSStats(t *testing.T) {
 	// create posix test setup
 	_, path, err := newPosixTestSetup()
@@ -43,9 +73,8 @@ func TestFSStats(t *testing.T) {
 		t.Fatalf("Unable to create volume, %s", err)
 	}

-	var buf = make([]byte, 4096)
 	var reader = bytes.NewReader([]byte("Hello, world"))
-	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
+	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 	// Seek back.
@@ -55,7 +84,7 @@ func TestFSStats(t *testing.T) {
 		t.Fatal("Unexpected error", err)
 	}

-	if _, err = fsCreateFile(pathJoin(path, "success-vol", "path/to/success-file"), reader, buf, reader.Size()); err != nil {
+	if _, err = fsCreateFile(pathJoin(path, "success-vol", "path/to/success-file"), reader, nil, 0); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 	// Seek back.
@@ -105,7 +134,7 @@ func TestFSStats(t *testing.T) {
 			srcFSPath:   path,
 			srcVol:      "success-vol",
 			srcPath:     "path",
-			expectedErr: errFileNotFound,
+			expectedErr: errFileAccessDenied,
 		},
 		// Test case - 6.
 		// Test case with src path segment > 255.
@@ -138,7 +167,8 @@ func TestFSStats(t *testing.T) {

 	for i, testCase := range testCases {
 		if testCase.srcPath != "" {
-			if _, err := fsStatFile(pathJoin(testCase.srcFSPath, testCase.srcVol, testCase.srcPath)); errorCause(err) != testCase.expectedErr {
+			if _, err := fsStatFile(pathJoin(testCase.srcFSPath, testCase.srcVol,
+				testCase.srcPath)); errorCause(err) != testCase.expectedErr {
 				t.Fatalf("TestPosix case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
 			}
 		} else {
@@ -169,9 +199,8 @@ func TestFSCreateAndOpen(t *testing.T) {
 		t.Fatal("Unexpected error", err)
 	}

-	var buf = make([]byte, 4096)
 	var reader = bytes.NewReader([]byte("Hello, world"))
-	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
+	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 	// Seek back.
@@ -199,7 +228,7 @@ func TestFSCreateAndOpen(t *testing.T) {
 	}

 	for i, testCase := range testCases {
-		_, err = fsCreateFile(pathJoin(path, testCase.srcVol, testCase.srcPath), reader, buf, reader.Size())
+		_, err = fsCreateFile(pathJoin(path, testCase.srcVol, testCase.srcPath), reader, nil, 0)
 		if errorCause(err) != testCase.expectedErr {
 			t.Errorf("Test case %d: Expected: \"%s\", got: \"%s\"", i+1, testCase.expectedErr, err)
 		}
@@ -292,15 +321,14 @@ func TestFSRemoves(t *testing.T) {
 		t.Fatalf("Unable to create directory, %s", err)
 	}

-	var buf = make([]byte, 4096)
 	var reader = bytes.NewReader([]byte("Hello, world"))
-	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, buf, reader.Size()); err != nil {
+	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file"), reader, nil, 0); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 	// Seek back.
 	reader.Seek(0, 0)

-	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file-new"), reader, buf, reader.Size()); err != nil {
+	if _, err = fsCreateFile(pathJoin(path, "success-vol", "success-file-new"), reader, nil, 0); err != nil {
 		t.Fatalf("Unable to create file, %s", err)
 	}
 	// Seek back.
@@ -396,3 +424,51 @@ func TestFSRemoves(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestFSRemoveMeta(t *testing.T) {
+	// create posix test setup
+	_, fsPath, err := newPosixTestSetup()
+	if err != nil {
+		t.Fatalf("Unable to create posix test setup, %s", err)
+	}
+	defer removeAll(fsPath)
+
+	// Setup test environment.
+	if err = fsMkdir(pathJoin(fsPath, "success-vol")); err != nil {
+		t.Fatalf("Unable to create directory, %s", err)
+	}
+
+	filePath := pathJoin(fsPath, "success-vol", "success-file")
+
+	var reader = bytes.NewReader([]byte("Hello, world"))
+	if _, err = fsCreateFile(filePath, reader, nil, 0); err != nil {
+		t.Fatalf("Unable to create file, %s", err)
+	}
+
+	rwPool := &fsIOPool{
+		readersMap: make(map[string]*lock.RLockedFile),
+	}
+
+	if _, err := rwPool.Open(filePath); err != nil {
+		t.Fatalf("Unable to lock file %s", filePath)
+	}
+
+	defer rwPool.Close(filePath)
+
+	tmpDir, tmpErr := ioutil.TempDir(globalTestTmpDir, "minio-")
+	if tmpErr != nil {
+		t.Fatal(tmpErr)
+	}
+
+	if err := fsRemoveMeta(fsPath, filePath, tmpDir); err != nil {
+		t.Fatalf("Unable to remove file, %s", err)
+	}
+
+	if _, err := osStat(preparePath(filePath)); !os.IsNotExist(err) {
+		t.Fatalf("`%s` file found though it should have been deleted.", filePath)
+	}
+
+	if _, err := osStat(preparePath(path.Dir(filePath))); !os.IsNotExist(err) {
+		t.Fatalf("`%s` parent directory found though it should have been deleted.", filePath)
+	}
+}
@@ -24,14 +24,31 @@ import (
 	pathutil "path"
 	"sort"
 	"strings"
+	"time"

 	"github.com/minio/minio/pkg/lock"
 	"github.com/minio/minio/pkg/mimedb"
+	"github.com/tidwall/gjson"
 )

+// FS format, and object metadata.
 const (
-	fsMetaJSONFile   = "fs.json"
-	fsFormatJSONFile = "format.json"
+	// fs.json object metadata.
+	fsMetaJSONFile = "fs.json"
+)
+
+// FS metadata constants.
+const (
+	// FS backend meta 1.0.0 version.
+	fsMetaVersion100 = "1.0.0"
+
+	// FS backend meta 1.0.1 version.
+	fsMetaVersion = "1.0.1"
+
+	// FS backend meta format.
+	fsMetaFormat = "fs"
+
+	// Add more constants here.
 )

 // A fsMetaV1 represents a metadata header mapping keys to sets of values.
@@ -46,6 +63,19 @@ type fsMetaV1 struct {
 	Parts []objectPartInfo  `json:"parts,omitempty"`
 }

+// IsValid - tells if the format is sane by validating the version
+// string and format style.
+func (m fsMetaV1) IsValid() bool {
+	return isFSMetaValid(m.Version, m.Format)
+}
+
+// Verifies if the backend format metadata is sane by validating
+// the version string and format style.
+func isFSMetaValid(version, format string) bool {
+	return ((version == fsMetaVersion || version == fsMetaVersion100) &&
+		format == fsMetaFormat)
+}
+
 // Converts metadata to object info.
 func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo {
 	if len(m.Meta) == 0 {
@@ -66,7 +96,7 @@ func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo
 		Name:   object,
 	}

-	// We set file into only if its valid.
+	// We set file info only if its valid.
 	objInfo.ModTime = timeSentinel
 	if fi != nil {
 		objInfo.ModTime = fi.ModTime()
@@ -74,17 +104,15 @@ func (m fsMetaV1) ToObjectInfo(bucket, object string, fi os.FileInfo) ObjectInfo
 		objInfo.IsDir = fi.IsDir()
 	}

-	objInfo.MD5Sum = m.Meta["md5Sum"]
+	// Extract etag from metadata.
+	objInfo.ETag = extractETag(m.Meta)
 	objInfo.ContentType = m.Meta["content-type"]
 	objInfo.ContentEncoding = m.Meta["content-encoding"]

-	// md5Sum has already been extracted into objInfo.MD5Sum.  We
-	// need to remove it from m.Meta to avoid it from appearing as
-	// part of response headers. e.g, X-Minio-* or X-Amz-*.
-	delete(m.Meta, "md5Sum")
-
-	// Save all the other userdefined API.
-	objInfo.UserDefined = m.Meta
+	// etag/md5Sum has already been extracted. We need to
+	// remove to avoid it from appearing as part of
+	// response headers. e.g, X-Minio-* or X-Amz-*.
+	objInfo.UserDefined = cleanMetaETag(m.Meta)

 	// Success..
 	return objInfo
@@ -144,42 +172,84 @@ func (m *fsMetaV1) WriteTo(lk *lock.LockedFile) (n int64, err error) {
 	return int64(len(metadataBytes)), nil
 }

+func parseFSVersion(fsMetaBuf []byte) string {
+	return gjson.GetBytes(fsMetaBuf, "version").String()
+}
+
+func parseFSFormat(fsMetaBuf []byte) string {
+	return gjson.GetBytes(fsMetaBuf, "format").String()
+}
+
+func parseFSRelease(fsMetaBuf []byte) string {
+	return gjson.GetBytes(fsMetaBuf, "minio.release").String()
+}
+
+func parseFSMetaMap(fsMetaBuf []byte) map[string]string {
+	// Get xlMetaV1.Meta map.
+	metaMapResult := gjson.GetBytes(fsMetaBuf, "meta").Map()
+	metaMap := make(map[string]string)
+	for key, valResult := range metaMapResult {
+		metaMap[key] = valResult.String()
+	}
+	return metaMap
+}
+
+func parseFSParts(fsMetaBuf []byte) []objectPartInfo {
+	// Parse the FS Parts.
+	partsResult := gjson.GetBytes(fsMetaBuf, "parts").Array()
+	partInfo := make([]objectPartInfo, len(partsResult))
+	for i, p := range partsResult {
+		info := objectPartInfo{}
+		info.Number = int(p.Get("number").Int())
+		info.Name = p.Get("name").String()
+		info.ETag = p.Get("etag").String()
+		info.Size = p.Get("size").Int()
+		partInfo[i] = info
+	}
+	return partInfo
+}
+
 func (m *fsMetaV1) ReadFrom(lk *lock.LockedFile) (n int64, err error) {
-	var metadataBytes []byte
+	var fsMetaBuf []byte
 	fi, err := lk.Stat()
 	if err != nil {
 		return 0, traceError(err)
 	}

-	metadataBytes, err = ioutil.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
+	fsMetaBuf, err = ioutil.ReadAll(io.NewSectionReader(lk, 0, fi.Size()))
 	if err != nil {
 		return 0, traceError(err)
 	}

-	if len(metadataBytes) == 0 {
+	if len(fsMetaBuf) == 0 {
 		return 0, traceError(io.EOF)
 	}

-	// Decode `fs.json` into fsMeta structure.
-	if err = json.Unmarshal(metadataBytes, m); err != nil {
-		return 0, traceError(err)
+	// obtain version.
+	m.Version = parseFSVersion(fsMetaBuf)
+
+	// obtain format.
+	m.Format = parseFSFormat(fsMetaBuf)
+
+	// Verify if the format is valid, return corrupted format
+	// for unrecognized formats.
+	if !isFSMetaValid(m.Version, m.Format) {
+		return 0, traceError(errCorruptedFormat)
 	}

+	// obtain metadata.
+	m.Meta = parseFSMetaMap(fsMetaBuf)
+
+	// obtain parts info list.
+	m.Parts = parseFSParts(fsMetaBuf)
+
+	// obtain minio release date.
+	m.Minio.Release = parseFSRelease(fsMetaBuf)
+
 	// Success.
-	return int64(len(metadataBytes)), nil
+	return int64(len(fsMetaBuf)), nil
 }

-// FS metadata constants.
-const (
-	// FS backend meta version.
-	fsMetaVersion = "1.0.0"
-
-	// FS backend meta format.
-	fsMetaFormat = "fs"
-
-	// Add more constants here.
-)
-
 // newFSMetaV1 - initializes new fsMetaV1.
 func newFSMetaV1() (fsMeta fsMetaV1) {
 	fsMeta = fsMetaV1{}
@@ -189,60 +259,97 @@ func newFSMetaV1() (fsMeta fsMetaV1) {
 	return fsMeta
 }

-// newFSFormatV1 - initializes new formatConfigV1 with FS format info.
-func newFSFormatV1() (format *formatConfigV1) {
-	return &formatConfigV1{
-		Version: "1",
-		Format:  "fs",
-		FS: &fsFormat{
-			Version: "1",
-		},
-	}
-}
+// Check if disk has already a valid format, holds a read lock and
+// upon success returns it to the caller to be closed.
+func checkLockedValidFormatFS(fsPath string) (*lock.RLockedFile, error) {
+	fsFormatPath := pathJoin(fsPath, minioMetaBucket, formatConfigFile)

-// loads format.json from minioMetaBucket if it exists.
-func loadFormatFS(fsPath string) (*formatConfigV1, error) {
-	rlk, err := lock.RLockedOpenFile(pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile))
+	rlk, err := lock.RLockedOpenFile(preparePath(fsFormatPath))
 	if err != nil {
 		if os.IsNotExist(err) {
-			return nil, errUnformattedDisk
+			// If format.json not found then
+			// its an unformatted disk.
+			return nil, traceError(errUnformattedDisk)
 		}
-		return nil, err
+		return nil, traceError(err)
 	}
-	defer rlk.Close()

-	formatBytes, err := ioutil.ReadAll(rlk)
-	if err != nil {
+	var format = &formatConfigV1{}
+	if err = format.LoadFormat(rlk.LockedFile); err != nil {
+		rlk.Close()
 		return nil, err
 	}

-	format := &formatConfigV1{}
-	if err = json.Unmarshal(formatBytes, format); err != nil {
+	// Check format FS.
+	if err = format.CheckFS(); err != nil {
+		rlk.Close()
 		return nil, err
 	}

-	return format, nil
+	//  Always return read lock here and should be closed by the caller.
+	return rlk, traceError(err)
 }

-// writes FS format (format.json) into minioMetaBucket.
-func saveFormatFS(formatPath string, fsFormat *formatConfigV1) error {
-	metadataBytes, err := json.Marshal(fsFormat)
-	if err != nil {
-		return err
-	}
+// Creates a new format.json if unformatted.
+func createFormatFS(fsPath string) error {
+	fsFormatPath := pathJoin(fsPath, minioMetaBucket, formatConfigFile)

-	// fsFormatJSONFile - format.json file stored in minioMetaBucket(.minio.sys) directory.
-	lk, err := lock.LockedOpenFile(preparePath(formatPath), os.O_CREATE|os.O_WRONLY, 0600)
+	// Attempt a write lock on formatConfigFile `format.json`
+	// file stored in minioMetaBucket(.minio.sys) directory.
+	lk, err := lock.TryLockedOpenFile(preparePath(fsFormatPath), os.O_RDWR|os.O_CREATE, 0600)
 	if err != nil {
-		return err
+		return traceError(err)
 	}
+	// Close the locked file upon return.
 	defer lk.Close()

-	_, err = lk.Write(metadataBytes)
-	// Success.
+	// Load format on disk, checks if we are unformatted
+	// writes the new format.json
+	var format = &formatConfigV1{}
+	err = format.LoadFormat(lk)
+	if errorCause(err) == errUnformattedDisk {
+		_, err = newFSFormat().WriteTo(lk)
+		return err
+	}
 	return err
 }

+func initFormatFS(fsPath string) (rlk *lock.RLockedFile, err error) {
+	// This loop validates format.json by holding a read lock and
+	// proceeds if disk unformatted to hold non-blocking WriteLock
+	// If for some reason non-blocking WriteLock fails and the error
+	// is lock.ErrAlreadyLocked i.e some other process is holding a
+	// lock we retry in the loop again.
+	for {
+		// Validate the `format.json` for expected values.
+		rlk, err = checkLockedValidFormatFS(fsPath)
+		switch {
+		case err == nil:
+			// Holding a read lock ensures that any write lock operation
+			// is blocked if attempted in-turn avoiding corruption on
+			// the backend disk.
+			return rlk, nil
+		case errorCause(err) == errUnformattedDisk:
+			if err = createFormatFS(fsPath); err != nil {
+				// Existing write locks detected.
+				if errorCause(err) == lock.ErrAlreadyLocked {
+					// Lock already present, sleep and attempt again.
+					time.Sleep(100 * time.Millisecond)
+					continue
+				}
+
+				// Unexpected error, return.
+				return nil, err
+			}
+
+			// Loop will continue to attempt a read-lock on `format.json`.
+		default:
+			// Unhandled error return.
+			return nil, err
+		}
+	}
+}
+
 // Return if the part info in uploadedParts and completeParts are same.
 func isPartsSame(uploadedParts []objectPartInfo, completeParts []completePart) bool {
 	if len(uploadedParts) != len(completeParts) {
@@ -18,7 +18,6 @@ package cmd

 import (
 	"bytes"
-	"os"
 	"path/filepath"
 	"testing"
 )
@@ -49,7 +48,7 @@ func TestReadFSMetadata(t *testing.T) {
 	bucketName := "bucket"
 	objectName := "object"

-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Unexpected err: ", err)
 	}
 	sha256sum := ""
@@ -59,7 +58,7 @@ func TestReadFSMetadata(t *testing.T) {
 	}

 	// Construct the full path of fs.json
-	fsPath := pathJoin("buckets", bucketName, objectName, "fs.json")
+	fsPath := pathJoin(bucketMetaPrefix, bucketName, objectName, "fs.json")
 	fsPath = pathJoin(fs.fsPath, minioMetaBucket, fsPath)

 	rlk, err := fs.rwPool.Open(fsPath)
@@ -73,18 +72,6 @@ func TestReadFSMetadata(t *testing.T) {
 	if _, err = fsMeta.ReadFrom(rlk.LockedFile); err != nil {
 		t.Fatal("Unexpected error ", err)
 	}
-
-	// Corrupted fs.json
-	file, err := os.OpenFile(preparePath(fsPath), os.O_APPEND|os.O_WRONLY, 0666)
-	if err != nil {
-		t.Fatal("Unexpected error ", err)
-	}
-	file.Write([]byte{'a'})
-	file.Close()
-	fsMeta = fsMetaV1{}
-	if _, err := fsMeta.ReadFrom(rlk.LockedFile); err == nil {
-		t.Fatal("Should fail", err)
-	}
 }

 // TestWriteFSMetadata - tests of writeFSMetadata with healthy disk.
@@ -98,7 +85,7 @@ func TestWriteFSMetadata(t *testing.T) {
 	bucketName := "bucket"
 	objectName := "object"

-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Unexpected err: ", err)
 	}
 	sha256sum := ""
@@ -108,7 +95,7 @@ func TestWriteFSMetadata(t *testing.T) {
 	}

 	// Construct the full path of fs.json
-	fsPath := pathJoin("buckets", bucketName, objectName, "fs.json")
+	fsPath := pathJoin(bucketMetaPrefix, bucketName, objectName, "fs.json")
 	fsPath = pathJoin(fs.fsPath, minioMetaBucket, fsPath)

 	rlk, err := fs.rwPool.Open(fsPath)
@@ -123,10 +110,10 @@ func TestWriteFSMetadata(t *testing.T) {
 	if err != nil {
 		t.Fatal("Unexpected error ", err)
 	}
-	if fsMeta.Version != "1.0.0" {
+	if fsMeta.Version != fsMetaVersion {
 		t.Fatalf("Unexpected version %s", fsMeta.Version)
 	}
-	if fsMeta.Format != "fs" {
+	if fsMeta.Format != fsMetaFormat {
 		t.Fatalf("Unexpected format %s", fsMeta.Format)
 	}
 }
@@ -1,5 +1,5 @@
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 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.
@@ -24,7 +24,6 @@ import (
 	"io"
 	"os"
 	pathutil "path"
-	"runtime"
 	"strings"
 	"time"

@@ -46,56 +45,15 @@ func (fs fsObjects) isMultipartUpload(bucket, prefix string) bool {
 	return true
 }

-// Delete uploads.json file wrapper handling a tricky case on windows.
+// Delete uploads.json file wrapper
 func (fs fsObjects) deleteUploadsJSON(bucket, object, uploadID string) error {
-	timeID := fmt.Sprintf("%X", time.Now().UTC().UnixNano())
-	tmpPath := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID, uploadID+"+"+timeID)
-
 	multipartBucketPath := pathJoin(fs.fsPath, minioMetaMultipartBucket)
 	uploadPath := pathJoin(multipartBucketPath, bucket, object)
 	uploadsMetaPath := pathJoin(uploadPath, uploadsJSONFile)

-	// Special case for windows please read through.
-	if runtime.GOOS == globalWindowsOSName {
-		// Ordinarily windows does not permit deletion or renaming of files still
-		// in use, but if all open handles to that file were opened with FILE_SHARE_DELETE
-		// then it can permit renames and deletions of open files.
-		//
-		// There are however some gotchas with this, and it is worth listing them here.
-		// Firstly, Windows never allows you to really delete an open file, rather it is
-		// flagged as delete pending and its entry in its directory remains visible
-		// (though no new file handles may be opened to it) and when the very last
-		// open handle to the file in the system is closed, only then is it truly
-		// deleted. Well, actually only sort of truly deleted, because Windows only
-		// appears to remove the file entry from the directory, but in fact that
-		// entry is merely hidden and actually still exists and attempting to create
-		// a file with the same name will return an access denied error. How long it
-		// silently exists for depends on a range of factors, but put it this way:
-		// if your code loops creating and deleting the same file name as you might
-		// when operating a lock file, you're going to see lots of random spurious
-		// access denied errors and truly dismal lock file performance compared to POSIX.
-		//
-		// We work-around these un-POSIX file semantics by taking a dual step to
-		// deleting files. Firstly, it renames the file to tmp location into multipartTmpBucket
-		// We always open files with FILE_SHARE_DELETE permission enabled, with that
-		// flag Windows permits renaming and deletion, and because the name was changed
-		// to a very random name somewhere not in its origin directory before deletion,
-		// you don't see those unexpected random errors when creating files with the
-		// same name as a recently deleted file as you do anywhere else on Windows.
-		// Because the file is probably not in its original containing directory any more,
-		// deletions of that directory will not fail with "directory not empty" as they
-		// otherwise normally would either.
-		fsRenameFile(uploadsMetaPath, tmpPath)
+	tmpDir := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID)

-		// Proceed to deleting the directory.
-		if err := fsDeleteFile(multipartBucketPath, uploadPath); err != nil {
-			return err
-		}
-
-		// Finally delete the renamed file.
-		return fsDeleteFile(pathutil.Dir(tmpPath), tmpPath)
-	}
-	return fsDeleteFile(multipartBucketPath, uploadsMetaPath)
+	return fsRemoveMeta(multipartBucketPath, uploadsMetaPath, tmpDir)
 }

 // Removes the uploadID, called either by CompleteMultipart of AbortMultipart. If the resuling uploads
@@ -380,7 +338,7 @@ func (fs fsObjects) newMultipartUpload(bucket string, object string, meta map[st
 	fsMeta.Meta = meta

 	uploadID = mustGetUUID()
-	initiated := time.Now().UTC()
+	initiated := UTCNow()

 	// Add upload ID to uploads.json
 	uploadsPath := pathJoin(bucket, object, uploadsJSONFile)
@@ -748,6 +706,11 @@ func (fs fsObjects) CompleteMultipartUpload(bucket string, object string, upload
 		return ObjectInfo{}, err
 	}

+	// Check if an object is present as one of the parent dir.
+	if fs.parentDirIsObject(bucket, pathutil.Dir(object)) {
+		return ObjectInfo{}, toObjectErr(traceError(errFileAccessDenied), bucket, object)
+	}
+
 	if _, err := fs.statBucketDir(bucket); err != nil {
 		return ObjectInfo{}, toObjectErr(err, bucket)
 	}
@@ -908,7 +871,7 @@ func (fs fsObjects) CompleteMultipartUpload(bucket string, object string, upload
 	if len(fsMeta.Meta) == 0 {
 		fsMeta.Meta = make(map[string]string)
 	}
-	fsMeta.Meta["md5Sum"] = s3MD5
+	fsMeta.Meta["etag"] = s3MD5

 	// Write all the set metadata.
 	if _, err = fsMeta.WriteTo(metaFile); err != nil {
@@ -33,7 +33,7 @@ func TestFSWriteUploadJSON(t *testing.T) {
 	bucketName := "bucket"
 	objectName := "object"

-	obj.MakeBucket(bucketName)
+	obj.MakeBucketWithLocation(bucketName, "")
 	_, err := obj.NewMultipartUpload(bucketName, objectName, nil)
 	if err != nil {
 		t.Fatal("Unexpected err: ", err)
@@ -60,7 +60,7 @@ func TestNewMultipartUploadFaultyDisk(t *testing.T) {
 	bucketName := "bucket"
 	objectName := "object"

-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Cannot create bucket, err: ", err)
 	}

@@ -91,7 +91,7 @@ func TestPutObjectPartFaultyDisk(t *testing.T) {
 	data := []byte("12345")
 	dataLen := int64(len(data))

-	if err = obj.MakeBucket(bucketName); err != nil {
+	if err = obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Cannot create bucket, err: ", err)
 	}

@@ -122,7 +122,7 @@ func TestCompleteMultipartUploadFaultyDisk(t *testing.T) {
 	objectName := "object"
 	data := []byte("12345")

-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Cannot create bucket, err: ", err)
 	}

@@ -161,7 +161,7 @@ func TestListMultipartUploadsFaultyDisk(t *testing.T) {
 	objectName := "object"
 	data := []byte("12345")

-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Cannot create bucket, err: ", err)
 	}

@@ -22,7 +22,9 @@ import (
 	"fmt"
 	"hash"
 	"io"
+	"io/ioutil"
 	"os"
+	"path"
 	"path/filepath"
 	"sort"
 	"syscall"
@@ -40,6 +42,9 @@ type fsObjects struct {
 	// temporary transactions.
 	fsUUID string

+	// This value shouldn't be touched, once initialized.
+	fsFormatRlk *lock.RLockedFile // Is a read lock on `format.json`.
+
 	// FS rw pool.
 	rwPool *fsIOPool

@@ -84,7 +89,7 @@ func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
 		return nil, err
 	}

-	fi, err := os.Stat(preparePath(fsPath))
+	fi, err := osStat(preparePath(fsPath))
 	if err == nil {
 		if !fi.IsDir() {
 			return nil, syscall.ENOTDIR
@@ -107,24 +112,10 @@ func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
 		return nil, fmt.Errorf("Unable to initialize '.minio.sys' meta volume, %s", err)
 	}

-	// Load `format.json`.
-	format, err := loadFormatFS(fsPath)
-	if err != nil && err != errUnformattedDisk {
-		return nil, fmt.Errorf("Unable to load 'format.json', %s", err)
-	}
-
-	// If the `format.json` doesn't exist create one.
-	if err == errUnformattedDisk {
-		fsFormatPath := pathJoin(fsPath, minioMetaBucket, fsFormatJSONFile)
-		// Initialize format.json, if already exists overwrite it.
-		if serr := saveFormatFS(fsFormatPath, newFSFormatV1()); serr != nil {
-			return nil, fmt.Errorf("Unable to initialize 'format.json', %s", serr)
-		}
-	}
-
-	// Validate if we have the same format.
-	if err == nil && format.Format != "fs" {
-		return nil, fmt.Errorf("Unable to recognize backend format, Disk is not in FS format. %s", format.Format)
+	// Initialize `format.json`, this function also returns.
+	rlk, err := initFormatFS(fsPath)
+	if err != nil {
+		return nil, err
 	}

 	// Initialize fs objects.
@@ -140,6 +131,12 @@ func newFSObjectLayer(fsPath string) (ObjectLayer, error) {
 		},
 	}

+	// Once the filesystem has initialized hold the read lock for
+	// the life time of the server. This is done to ensure that under
+	// shared backend mode for FS, remote servers do not migrate
+	// or cause changes on backend format.
+	fs.fsFormatRlk = rlk
+
 	// Initialize and load bucket policies.
 	err = initBucketPolicies(fs)
 	if err != nil {
@@ -203,7 +200,7 @@ func (fs fsObjects) statBucketDir(bucket string) (os.FileInfo, error) {

 // MakeBucket - create a new bucket, returns if it
 // already exists.
-func (fs fsObjects) MakeBucket(bucket string) error {
+func (fs fsObjects) MakeBucketWithLocation(bucket, location string) error {
 	bucketDir, err := fs.getBucketDir(bucket)
 	if err != nil {
 		return toObjectErr(err, bucket)
@@ -223,7 +220,7 @@ func (fs fsObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
 		return BucketInfo{}, toObjectErr(err, bucket)
 	}

-	// As os.Stat() doesn't carry other than ModTime(), use ModTime() as CreatedTime.
+	// As osStat() doesn't carry other than ModTime(), use ModTime() as CreatedTime.
 	createdTime := st.ModTime()
 	return BucketInfo{
 		Name:    bucket,
@@ -262,7 +259,7 @@ func (fs fsObjects) ListBuckets() ([]BucketInfo, error) {

 		bucketInfos = append(bucketInfos, BucketInfo{
 			Name: fi.Name(),
-			// As os.Stat() doesnt carry CreatedTime, use ModTime() as CreatedTime.
+			// As osStat() doesnt carry CreatedTime, use ModTime() as CreatedTime.
 			Created: fi.ModTime(),
 		})
 	}
@@ -470,12 +467,6 @@ func (fs fsObjects) getObjectInfo(bucket, object string) (ObjectInfo, error) {

 // GetObjectInfo - reads object metadata and replies back ObjectInfo.
 func (fs fsObjects) GetObjectInfo(bucket, object string) (ObjectInfo, error) {
-	// This is a special case with object whose name ends with
-	// a slash separator, we always return object not found here.
-	if hasSuffix(object, slashSeparator) {
-		return ObjectInfo{}, toObjectErr(traceError(errFileNotFound), bucket, object)
-	}
-
 	if err := checkGetObjArgs(bucket, object); err != nil {
 		return ObjectInfo{}, err
 	}
@@ -487,23 +478,55 @@ func (fs fsObjects) GetObjectInfo(bucket, object string) (ObjectInfo, error) {
 	return fs.getObjectInfo(bucket, object)
 }

+// This function does the following check, suppose
+// object is "a/b/c/d", stat makes sure that objects ""a/b/c""
+// "a/b" and "a" do not exist.
+func (fs fsObjects) parentDirIsObject(bucket, parent string) bool {
+	var isParentDirObject func(string) bool
+	isParentDirObject = func(p string) bool {
+		if p == "." {
+			return false
+		}
+		if _, err := fsStatFile(pathJoin(fs.fsPath, bucket, p)); err == nil {
+			// If there is already a file at prefix "p" return error.
+			return true
+		}
+		// Check if there is a file as one of the parent paths.
+		return isParentDirObject(path.Dir(p))
+	}
+	return isParentDirObject(parent)
+}
+
 // PutObject - creates an object upon reading from the input stream
 // until EOF, writes data directly to configured filesystem path.
 // Additionally writes `fs.json` which carries the necessary metadata
 // for future object operations.
-func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, err error) {
-	// This is a special case with size as '0' and object ends with
-	// a slash separator, we treat it like a valid operation and
-	// return success.
+func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, retErr error) {
+	var err error
+
+	// Validate if bucket name is valid and exists.
+	if _, err = fs.statBucketDir(bucket); err != nil {
+		return ObjectInfo{}, toObjectErr(err, bucket)
+	}
+
+	// This is a special case with size as '0' and object ends
+	// with a slash separator, we treat it like a valid operation
+	// and return success.
 	if isObjectDir(object, size) {
+		// Check if an object is present as one of the parent dir.
+		if fs.parentDirIsObject(bucket, path.Dir(object)) {
+			return ObjectInfo{}, toObjectErr(traceError(errFileAccessDenied), bucket, object)
+		}
 		return dirObjectInfo(bucket, object, size, metadata), nil
 	}
+
 	if err = checkPutObjectArgs(bucket, object, fs); err != nil {
 		return ObjectInfo{}, err
 	}

-	if _, err = fs.statBucketDir(bucket); err != nil {
-		return ObjectInfo{}, toObjectErr(err, bucket)
+	// Check if an object is present as one of the parent dir.
+	if fs.parentDirIsObject(bucket, path.Dir(object)) {
+		return ObjectInfo{}, toObjectErr(traceError(errFileAccessDenied), bucket, object)
 	}

 	// No metadata is set, allocate a new one.
@@ -516,13 +539,21 @@ func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.

 	var wlk *lock.LockedFile
 	if bucket != minioMetaBucket {
-		fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, object, fsMetaJSONFile)
+		bucketMetaDir := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix)
+		fsMetaPath := pathJoin(bucketMetaDir, bucket, object, fsMetaJSONFile)
 		wlk, err = fs.rwPool.Create(fsMetaPath)
 		if err != nil {
 			return ObjectInfo{}, toObjectErr(traceError(err), bucket, object)
 		}
 		// This close will allow for locks to be synchronized on `fs.json`.
 		defer wlk.Close()
+		defer func() {
+			// Remove meta file when PutObject encounters any error
+			if retErr != nil {
+				tmpDir := pathJoin(fs.fsPath, minioMetaTmpBucket, fs.fsUUID)
+				fsRemoveMeta(bucketMetaDir, fsMetaPath, tmpDir)
+			}
+		}()
 	}

 	// Uploaded object will first be written to the temporary location which will eventually
@@ -581,12 +612,12 @@ func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.

 	newMD5Hex := hex.EncodeToString(md5Writer.Sum(nil))
 	// Update the md5sum if not set with the newly calculated one.
-	if len(metadata["md5Sum"]) == 0 {
-		metadata["md5Sum"] = newMD5Hex
+	if len(metadata["etag"]) == 0 {
+		metadata["etag"] = newMD5Hex
 	}

 	// md5Hex representation.
-	md5Hex := metadata["md5Sum"]
+	md5Hex := metadata["etag"]
 	if md5Hex != "" {
 		if newMD5Hex != md5Hex {
 			// Returns md5 mismatch.
@@ -687,6 +718,45 @@ func (fs fsObjects) listDirFactory(isLeaf isLeafFunc) listDirFunc {
 	return listDir
 }

+// getObjectETag is a helper function, which returns only the md5sum
+// of the file on the disk.
+func (fs fsObjects) getObjectETag(bucket, entry string) (string, error) {
+	fsMetaPath := pathJoin(fs.fsPath, minioMetaBucket, bucketMetaPrefix, bucket, entry, fsMetaJSONFile)
+
+	// Read `fs.json` to perhaps contend with
+	// parallel Put() operations.
+	rlk, err := fs.rwPool.Open(fsMetaPath)
+	// Ignore if `fs.json` is not available, this is true for pre-existing data.
+	if err != nil && err != errFileNotFound {
+		return "", toObjectErr(traceError(err), bucket, entry)
+	}
+
+	// If file is not found, we don't need to proceed forward.
+	if err == errFileNotFound {
+		return "", nil
+	}
+
+	// Read from fs metadata only if it exists.
+	defer fs.rwPool.Close(fsMetaPath)
+
+	fsMetaBuf, err := ioutil.ReadAll(rlk.LockedFile)
+	if err != nil {
+		// `fs.json` can be empty due to previously failed
+		// PutObject() transaction, if we arrive at such
+		// a situation we just ignore and continue.
+		if errorCause(err) != io.EOF {
+			return "", toObjectErr(err, bucket, entry)
+		}
+	}
+
+	// Check if FS metadata is valid, if not return error.
+	if !isFSMetaValid(parseFSVersion(fsMetaBuf), parseFSFormat(fsMetaBuf)) {
+		return "", toObjectErr(traceError(errCorruptedFormat), bucket, entry)
+	}
+
+	return extractETag(parseFSMetaMap(fsMetaBuf)), nil
+}
+
 // ListObjects - list all objects at prefix upto maxKeys., optionally delimited by '/'. Maintains the list pool
 // state for future re-entrant list requests.
 func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsInfo, error) {
@@ -731,14 +801,33 @@ func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKey
 			objInfo.IsDir = true
 			return
 		}
+
+		// Protect reading `fs.json`.
+		objectLock := globalNSMutex.NewNSLock(bucket, entry)
+		objectLock.RLock()
+		var etag string
+		etag, err = fs.getObjectETag(bucket, entry)
+		objectLock.RUnlock()
+		if err != nil {
+			return ObjectInfo{}, err
+		}
+
 		// Stat the file to get file size.
 		var fi os.FileInfo
 		fi, err = fsStatFile(pathJoin(fs.fsPath, bucket, entry))
 		if err != nil {
 			return ObjectInfo{}, toObjectErr(err, bucket, entry)
 		}
-		fsMeta := fsMetaV1{}
-		return fsMeta.ToObjectInfo(bucket, entry, fi), nil
+
+		// Success.
+		return ObjectInfo{
+			Name:    entry,
+			Bucket:  bucket,
+			Size:    fi.Size(),
+			ModTime: fi.ModTime(),
+			IsDir:   fi.IsDir(),
+			ETag:    etag,
+		}, nil
 	}

 	heal := false // true only for xl.ListObjectsHeal()
@@ -809,8 +898,8 @@ func (fs fsObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKey
 }

 // HealObject - no-op for fs. Valid only for XL.
-func (fs fsObjects) HealObject(bucket, object string) error {
-	return traceError(NotImplemented{})
+func (fs fsObjects) HealObject(bucket, object string) (int, int, error) {
+	return 0, 0, traceError(NotImplemented{})
 }

 // HealBucket - no-op for fs, Valid only for XL.
@@ -63,7 +63,7 @@ func TestFSShutdown(t *testing.T) {
 		obj := initFSObjects(disk, t)
 		fs := obj.(*fsObjects)
 		objectContent := "12345"
-		obj.MakeBucket(bucketName)
+		obj.MakeBucketWithLocation(bucketName, "")
 		sha256sum := ""
 		obj.PutObject(bucketName, objectName, int64(len(objectContent)), bytes.NewReader([]byte(objectContent)), nil, sha256sum)
 		return fs, disk
@@ -85,47 +85,6 @@ func TestFSShutdown(t *testing.T) {
 	}
 }

-// TestFSLoadFormatFS - test loadFormatFS with healty and faulty disks
-func TestFSLoadFormatFS(t *testing.T) {
-	// Prepare for testing
-	disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
-	defer removeAll(disk)
-
-	// 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)
-	}
-
-	fsFormatPath := pathJoin(disk, minioMetaBucket, fsFormatJSONFile)
-	if err := saveFormatFS(preparePath(fsFormatPath), newFSFormatV1()); err != nil {
-		t.Fatal("Should not fail here", err)
-	}
-	_, err := loadFormatFS(disk)
-	if err != nil {
-		t.Fatal("Should not fail here", err)
-	}
-	// Loading corrupted format file
-	file, err := os.OpenFile(preparePath(fsFormatPath), os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0666)
-	if err != nil {
-		t.Fatal("Should not fail here", err)
-	}
-	file.Write([]byte{'b'})
-	file.Close()
-	_, err = loadFormatFS(disk)
-	if err == nil {
-		t.Fatal("Should return an error here")
-	}
-	// Loading format file from disk not found.
-	removeAll(disk)
-	_, err = loadFormatFS(disk)
-	if err != nil && err != errUnformattedDisk {
-		t.Fatal("Should return unformatted disk, but got", err)
-	}
-}
-
 // TestFSGetBucketInfo - test GetBucketInfo with healty and faulty disks
 func TestFSGetBucketInfo(t *testing.T) {
 	// Prepare for testing
@@ -136,7 +95,7 @@ func TestFSGetBucketInfo(t *testing.T) {
 	fs := obj.(*fsObjects)
 	bucketName := "bucket"

-	obj.MakeBucket(bucketName)
+	obj.MakeBucketWithLocation(bucketName, "")

 	// Test with valid parameters
 	info, err := fs.GetBucketInfo(bucketName)
@@ -161,6 +120,74 @@ func TestFSGetBucketInfo(t *testing.T) {
 	}
 }

+func TestFSPutObject(t *testing.T) {
+	// Prepare for tests
+	disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
+	defer removeAll(disk)
+
+	obj := initFSObjects(disk, t)
+	bucketName := "bucket"
+	objectName := "1/2/3/4/object"
+
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
+		t.Fatal(err)
+	}
+
+	sha256sum := ""
+
+	// With a regular object.
+	_, err := obj.PutObject(bucketName+"non-existent", objectName, int64(len("abcd")), bytes.NewReader([]byte("abcd")), nil, sha256sum)
+	if err == nil {
+		t.Fatal("Unexpected should fail here, bucket doesn't exist")
+	}
+	if _, ok := errorCause(err).(BucketNotFound); !ok {
+		t.Fatalf("Expected error type BucketNotFound, got %#v", err)
+	}
+
+	// With a directory object.
+	_, err = obj.PutObject(bucketName+"non-existent", objectName+"/", int64(0), bytes.NewReader([]byte("")), nil, sha256sum)
+	if err == nil {
+		t.Fatal("Unexpected should fail here, bucket doesn't exist")
+	}
+	if _, ok := errorCause(err).(BucketNotFound); !ok {
+		t.Fatalf("Expected error type BucketNotFound, got %#v", err)
+	}
+
+	_, err = obj.PutObject(bucketName, objectName, int64(len("abcd")), bytes.NewReader([]byte("abcd")), nil, sha256sum)
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = obj.PutObject(bucketName, objectName+"/1", int64(len("abcd")), bytes.NewReader([]byte("abcd")), nil, sha256sum)
+	if err == nil {
+		t.Fatal("Unexpected should fail here, backend corruption occurred")
+	}
+	if nerr, ok := errorCause(err).(PrefixAccessDenied); !ok {
+		t.Fatalf("Expected PrefixAccessDenied, got %#v", err)
+	} else {
+		if nerr.Bucket != "bucket" {
+			t.Fatalf("Expected 'bucket', got %s", nerr.Bucket)
+		}
+		if nerr.Object != "1/2/3/4/object/1" {
+			t.Fatalf("Expected '1/2/3/4/object/1', got %s", nerr.Object)
+		}
+	}
+
+	_, err = obj.PutObject(bucketName, objectName+"/1/", 0, bytes.NewReader([]byte("")), nil, sha256sum)
+	if err == nil {
+		t.Fatal("Unexpected should fail here, backned corruption occurred")
+	}
+	if nerr, ok := errorCause(err).(PrefixAccessDenied); !ok {
+		t.Fatalf("Expected PrefixAccessDenied, got %#v", err)
+	} else {
+		if nerr.Bucket != "bucket" {
+			t.Fatalf("Expected 'bucket', got %s", nerr.Bucket)
+		}
+		if nerr.Object != "1/2/3/4/object/1/" {
+			t.Fatalf("Expected '1/2/3/4/object/1/', got %s", nerr.Object)
+		}
+	}
+}
+
 // TestFSDeleteObject - test fs.DeleteObject() with healthy and corrupted disks
 func TestFSDeleteObject(t *testing.T) {
 	// Prepare for tests
@@ -172,7 +199,7 @@ func TestFSDeleteObject(t *testing.T) {
 	bucketName := "bucket"
 	objectName := "object"

-	obj.MakeBucket(bucketName)
+	obj.MakeBucketWithLocation(bucketName, "")
 	sha256sum := ""
 	obj.PutObject(bucketName, objectName, int64(len("abcd")), bytes.NewReader([]byte("abcd")), nil, sha256sum)

@@ -217,7 +244,7 @@ func TestFSDeleteBucket(t *testing.T) {
 	fs := obj.(*fsObjects)
 	bucketName := "bucket"

-	err := obj.MakeBucket(bucketName)
+	err := obj.MakeBucketWithLocation(bucketName, "")
 	if err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}
@@ -235,7 +262,7 @@ func TestFSDeleteBucket(t *testing.T) {
 		t.Fatal("Unexpected error: ", err)
 	}

-	obj.MakeBucket(bucketName)
+	obj.MakeBucketWithLocation(bucketName, "")

 	// Delete bucker should get error disk not found.
 	removeAll(disk)
@@ -256,7 +283,7 @@ func TestFSListBuckets(t *testing.T) {
 	fs := obj.(*fsObjects)

 	bucketName := "bucket"
-	if err := obj.MakeBucket(bucketName); err != nil {
+	if err := obj.MakeBucketWithLocation(bucketName, ""); err != nil {
 		t.Fatal("Unexpected error: ", err)
 	}

@@ -303,7 +330,7 @@ func TestFSHealObject(t *testing.T) {
 	defer removeAll(disk)

 	obj := initFSObjects(disk, t)
-	err := obj.HealObject("bucket", "object")
+	_, _, err := obj.HealObject("bucket", "object")
 	if err == nil || !isSameType(errorCause(err), NotImplemented{}) {
 		t.Fatalf("Heal Object should return NotImplemented error ")
 	}
@@ -30,7 +30,7 @@ import (
 )

 // AnonGetBucketInfo - Get bucket metadata from azure anonymously.
-func (a AzureObjects) AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, err error) {
+func (a *azureObjects) AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, err error) {
 	url, err := url.Parse(a.client.GetBlobURL(bucket, ""))
 	if err != nil {
 		return bucketInfo, azureToObjectError(traceError(err))
@@ -40,7 +40,7 @@ func (a AzureObjects) AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, e
 	if err != nil {
 		return bucketInfo, azureToObjectError(traceError(err), bucket)
 	}
-	defer resp.Body.Close()
+	resp.Body.Close()

 	if resp.StatusCode != http.StatusOK {
 		return bucketInfo, azureToObjectError(traceError(anonErrToObjectErr(resp.StatusCode, bucket)), bucket)
@@ -57,11 +57,18 @@ func (a AzureObjects) AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, e
 	return bucketInfo, nil
 }

+// AnonPutObject - SendPUT request without authentication.
+// This is needed when clients send PUT requests on objects that can be uploaded without auth.
+func (a *azureObjects) AnonPutObject(bucket, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, err error) {
+	// azure doesn't support anonymous put
+	return ObjectInfo{}, traceError(NotImplemented{})
+}
+
 // AnonGetObject - SendGET request without authentication.
 // This is needed when clients send GET requests on objects that can be downloaded without auth.
-func (a AzureObjects) AnonGetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) (err error) {
-	url := a.client.GetBlobURL(bucket, object)
-	req, err := http.NewRequest("GET", url, nil)
+func (a *azureObjects) AnonGetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) (err error) {
+	u := a.client.GetBlobURL(bucket, object)
+	req, err := http.NewRequest("GET", u, nil)
 	if err != nil {
 		return azureToObjectError(traceError(err), bucket, object)
 	}
@@ -88,12 +95,12 @@ func (a AzureObjects) AnonGetObject(bucket, object string, startOffset int64, le

 // AnonGetObjectInfo - Send HEAD request without authentication and convert the
 // result to ObjectInfo.
-func (a AzureObjects) AnonGetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error) {
+func (a *azureObjects) AnonGetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error) {
 	resp, err := http.Head(a.client.GetBlobURL(bucket, object))
 	if err != nil {
 		return objInfo, azureToObjectError(traceError(err), bucket, object)
 	}
-	defer resp.Body.Close()
+	resp.Body.Close()

 	if resp.StatusCode != http.StatusOK {
 		return objInfo, azureToObjectError(traceError(anonErrToObjectErr(resp.StatusCode, bucket, object)), bucket, object)
@@ -120,7 +127,7 @@ func (a AzureObjects) AnonGetObjectInfo(bucket, object string) (objInfo ObjectIn
 		objInfo.UserDefined["Content-Encoding"] = resp.Header.Get("Content-Encoding")
 	}
 	objInfo.UserDefined["Content-Type"] = resp.Header.Get("Content-Type")
-	objInfo.MD5Sum = resp.Header.Get("Etag")
+	objInfo.ETag = resp.Header.Get("Etag")
 	objInfo.ModTime = t
 	objInfo.Name = object
 	objInfo.Size = contentLength
@@ -128,7 +135,7 @@ func (a AzureObjects) AnonGetObjectInfo(bucket, object string) (objInfo ObjectIn
 }

 // AnonListObjects - Use Azure equivalent ListBlobs.
-func (a AzureObjects) AnonListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error) {
+func (a *azureObjects) AnonListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error) {
 	params := storage.ListBlobsParameters{
 		Prefix:     prefix,
 		Marker:     marker,
@@ -175,7 +182,7 @@ func (a AzureObjects) AnonListObjects(bucket, prefix, marker, delimiter string,
 			Name:            object.Name,
 			ModTime:         t,
 			Size:            object.Properties.ContentLength,
-			MD5Sum:          object.Properties.Etag,
+			ETag:            object.Properties.Etag,
 			ContentType:     object.Properties.ContentType,
 			ContentEncoding: object.Properties.ContentEncoding,
 		})
@@ -17,27 +17,27 @@
 package cmd

 // HealBucket - Not relevant.
-func (a AzureObjects) HealBucket(bucket string) error {
+func (a *azureObjects) HealBucket(bucket string) error {
 	return traceError(NotImplemented{})
 }

 // ListBucketsHeal - Not relevant.
-func (a AzureObjects) ListBucketsHeal() (buckets []BucketInfo, err error) {
+func (a *azureObjects) ListBucketsHeal() (buckets []BucketInfo, err error) {
 	return nil, traceError(NotImplemented{})
 }

 // HealObject - Not relevant.
-func (a AzureObjects) HealObject(bucket, object string) error {
-	return traceError(NotImplemented{})
+func (a *azureObjects) HealObject(bucket, object string) (int, int, error) {
+	return 0, 0, traceError(NotImplemented{})
 }

 // ListObjectsHeal - Not relevant.
-func (a AzureObjects) ListObjectsHeal(bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsInfo, error) {
+func (a *azureObjects) ListObjectsHeal(bucket, prefix, marker, delimiter string, maxKeys int) (ListObjectsInfo, error) {
 	return ListObjectsInfo{}, traceError(NotImplemented{})
 }

 // ListUploadsHeal - Not relevant.
-func (a AzureObjects) ListUploadsHeal(bucket, prefix, marker, uploadIDMarker,
+func (a *azureObjects) ListUploadsHeal(bucket, prefix, marker, uploadIDMarker,
 	delimiter string, maxUploads int) (ListMultipartsInfo, error) {
 	return ListMultipartsInfo{}, traceError(NotImplemented{})
 }
@@ -17,6 +17,7 @@
 package cmd

 import (
+	"crypto/md5"
 	"encoding/base64"
 	"encoding/hex"
 	"fmt"
@@ -36,6 +37,36 @@ import (

 const globalAzureAPIVersion = "2016-05-31"

+// Canonicalize the metadata headers, without this azure-sdk calculates
+// incorrect signature. This attempt to canonicalize is to convert
+// any HTTP header which is of form say `accept-encoding` should be
+// converted to `Accept-Encoding` in its canonical form.
+// Also replaces X-Amz-Meta prefix with X-Ms-Meta as Azure expects user
+// defined metadata to have X-Ms-Meta prefix.
+func s3ToAzureHeaders(headers map[string]string) (newHeaders map[string]string) {
+	newHeaders = make(map[string]string)
+	for k, v := range headers {
+		k = http.CanonicalHeaderKey(k)
+		if strings.HasPrefix(k, "X-Amz-Meta") {
+			k = strings.Replace(k, "X-Amz-Meta", "X-Ms-Meta", -1)
+		}
+		newHeaders[k] = v
+	}
+	return newHeaders
+}
+
+// Prefix user metadata with "X-Amz-Meta-".
+// client.GetBlobMetadata() already strips "X-Ms-Meta-"
+func azureToS3Metadata(meta map[string]string) (newMeta map[string]string) {
+	newMeta = make(map[string]string)
+
+	for k, v := range meta {
+		k = "X-Amz-Meta-" + k
+		newMeta[k] = v
+	}
+	return newMeta
+}
+
 // To store metadata during NewMultipartUpload which will be used after
 // CompleteMultipartUpload to call SetBlobMetadata.
 type azureMultipartMetaInfo struct {
@@ -64,8 +95,8 @@ func (a *azureMultipartMetaInfo) del(key string) {
 	delete(a.meta, key)
 }

-// AzureObjects - Implements Object layer for Azure blob storage.
-type AzureObjects struct {
+// azureObjects - Implements Object layer for Azure blob storage.
+type azureObjects struct {
 	client   storage.BlobStorageClient // Azure sdk client
 	metaInfo azureMultipartMetaInfo
 }
@@ -122,16 +153,16 @@ func azureToObjectError(err error, params ...string) error {
 	return e
 }

-// Inits azure blob storage client and returns AzureObjects.
+// Inits azure blob storage client and returns azureObjects.
 func newAzureLayer(endPoint string, account, key string, secure bool) (GatewayLayer, error) {
 	if endPoint == "" {
 		endPoint = storage.DefaultBaseURL
 	}
 	c, err := storage.NewClient(account, key, endPoint, globalAzureAPIVersion, secure)
 	if err != nil {
-		return AzureObjects{}, err
+		return &azureObjects{}, err
 	}
-	return &AzureObjects{
+	return &azureObjects{
 		client: c.GetBlobService(),
 		metaInfo: azureMultipartMetaInfo{
 			meta:  make(map[string]map[string]string),
@@ -142,24 +173,24 @@ func newAzureLayer(endPoint string, account, key string, secure bool) (GatewayLa

 // Shutdown - save any gateway metadata to disk
 // if necessary and reload upon next restart.
-func (a AzureObjects) Shutdown() error {
+func (a *azureObjects) Shutdown() error {
 	// TODO
 	return nil
 }

 // StorageInfo - Not relevant to Azure backend.
-func (a AzureObjects) StorageInfo() StorageInfo {
+func (a *azureObjects) StorageInfo() StorageInfo {
 	return StorageInfo{}
 }

-// MakeBucket - Create a new container on azure backend.
-func (a AzureObjects) MakeBucket(bucket string) error {
+// MakeBucketWithLocation - Create a new container on azure backend.
+func (a *azureObjects) MakeBucketWithLocation(bucket, location string) error {
 	err := a.client.CreateContainer(bucket, storage.ContainerAccessTypePrivate)
 	return azureToObjectError(traceError(err), bucket)
 }

 // GetBucketInfo - Get bucket metadata..
-func (a AzureObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
+func (a *azureObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
 	// Azure does not have an equivalent call, hence use ListContainers.
 	resp, err := a.client.ListContainers(storage.ListContainersParameters{
 		Prefix: bucket,
@@ -182,7 +213,7 @@ func (a AzureObjects) GetBucketInfo(bucket string) (BucketInfo, error) {
 }

 // ListBuckets - Lists all azure containers, uses Azure equivalent ListContainers.
-func (a AzureObjects) ListBuckets() (buckets []BucketInfo, err error) {
+func (a *azureObjects) ListBuckets() (buckets []BucketInfo, err error) {
 	resp, err := a.client.ListContainers(storage.ListContainersParameters{})
 	if err != nil {
 		return nil, azureToObjectError(traceError(err))
@@ -201,13 +232,13 @@ func (a AzureObjects) ListBuckets() (buckets []BucketInfo, err error) {
 }

 // DeleteBucket - delete a container on azure, uses Azure equivalent DeleteContainer.
-func (a AzureObjects) DeleteBucket(bucket string) error {
+func (a *azureObjects) DeleteBucket(bucket string) error {
 	return azureToObjectError(traceError(a.client.DeleteContainer(bucket)), bucket)
 }

 // ListObjects - lists all blobs on azure with in a container filtered by prefix
 // and marker, uses Azure equivalent ListBlobs.
-func (a AzureObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error) {
+func (a *azureObjects) ListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error) {
 	resp, err := a.client.ListBlobs(bucket, storage.ListBlobsParameters{
 		Prefix:     prefix,
 		Marker:     marker,
@@ -229,7 +260,7 @@ func (a AzureObjects) ListObjects(bucket, prefix, marker, delimiter string, maxK
 			Name:            object.Name,
 			ModTime:         t,
 			Size:            object.Properties.ContentLength,
-			MD5Sum:          canonicalizeETag(object.Properties.Etag),
+			ETag:            canonicalizeETag(object.Properties.Etag),
 			ContentType:     object.Properties.ContentType,
 			ContentEncoding: object.Properties.ContentEncoding,
 		})
@@ -244,7 +275,7 @@ func (a AzureObjects) ListObjects(bucket, prefix, marker, delimiter string, maxK
 //
 // startOffset indicates the starting read location of the object.
 // length indicates the total length of the object.
-func (a AzureObjects) GetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) error {
+func (a *azureObjects) GetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) error {
 	byteRange := fmt.Sprintf("%d-", startOffset)
 	if length > 0 && startOffset > 0 {
 		byteRange = fmt.Sprintf("%d-%d", startOffset, startOffset+length-1)
@@ -267,7 +298,14 @@ func (a AzureObjects) GetObject(bucket, object string, startOffset int64, length

 // GetObjectInfo - reads blob metadata properties and replies back ObjectInfo,
 // uses zure equivalent GetBlobProperties.
-func (a AzureObjects) GetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error) {
+func (a *azureObjects) GetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error) {
+	blobMeta, err := a.client.GetBlobMetadata(bucket, object)
+	if err != nil {
+		return objInfo, azureToObjectError(traceError(err), bucket, object)
+	}
+
+	meta := azureToS3Metadata(blobMeta)
+
 	prop, err := a.client.GetBlobProperties(bucket, object)
 	if err != nil {
 		return objInfo, azureToObjectError(traceError(err), bucket, object)
@@ -276,55 +314,69 @@ func (a AzureObjects) GetObjectInfo(bucket, object string) (objInfo ObjectInfo,
 	if err != nil {
 		return objInfo, traceError(err)
 	}
+
+	if prop.ContentEncoding != "" {
+		meta["Content-Encoding"] = prop.ContentEncoding
+	}
+	meta["Content-Type"] = prop.ContentType
+
 	objInfo = ObjectInfo{
 		Bucket:      bucket,
-		UserDefined: make(map[string]string),
-		MD5Sum:      canonicalizeETag(prop.Etag),
+		UserDefined: meta,
+		ETag:        canonicalizeETag(prop.Etag),
 		ModTime:     t,
 		Name:        object,
 		Size:        prop.ContentLength,
 	}
-	if prop.ContentEncoding != "" {
-		objInfo.UserDefined["Content-Encoding"] = prop.ContentEncoding
-	}
-	objInfo.UserDefined["Content-Type"] = prop.ContentType
-	return objInfo, nil
-}

-// Canonicalize the metadata headers, without this azure-sdk calculates
-// incorrect signature. This attempt to canonicalize is to convert
-// any HTTP header which is of form say `accept-encoding` should be
-// converted to `Accept-Encoding` in its canonical form.
-func canonicalMetadata(metadata map[string]string) (canonical map[string]string) {
-	canonical = make(map[string]string)
-	for k, v := range metadata {
-		canonical[http.CanonicalHeaderKey(k)] = v
-	}
-	return canonical
+	return objInfo, nil
 }

 // PutObject - Create a new blob with the incoming data,
 // uses Azure equivalent CreateBlockBlobFromReader.
-func (a AzureObjects) PutObject(bucket, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, err error) {
+func (a *azureObjects) PutObject(bucket, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (objInfo ObjectInfo, err error) {
 	var sha256Writer hash.Hash
+	var md5sumWriter hash.Hash
+
+	var writers []io.Writer
+
+	md5sum := metadata["etag"]
+	delete(metadata, "etag")
+
 	teeReader := data
+
 	if sha256sum != "" {
 		sha256Writer = sha256.New()
-		teeReader = io.TeeReader(data, sha256Writer)
+		writers = append(writers, sha256Writer)
 	}

-	delete(metadata, "md5Sum")
+	if md5sum != "" {
+		md5sumWriter = md5.New()
+		writers = append(writers, md5sumWriter)
+	}

-	err = a.client.CreateBlockBlobFromReader(bucket, object, uint64(size), teeReader, canonicalMetadata(metadata))
+	if len(writers) > 0 {
+		teeReader = io.TeeReader(data, io.MultiWriter(writers...))
+	}
+
+	err = a.client.CreateBlockBlobFromReader(bucket, object, uint64(size), teeReader, s3ToAzureHeaders(metadata))
 	if err != nil {
 		return objInfo, azureToObjectError(traceError(err), bucket, object)
 	}

+	if md5sum != "" {
+		newMD5sum := hex.EncodeToString(md5sumWriter.Sum(nil))
+		if newMD5sum != md5sum {
+			a.client.DeleteBlob(bucket, object, nil)
+			return ObjectInfo{}, azureToObjectError(traceError(BadDigest{md5sum, newMD5sum}))
+		}
+	}
+
 	if sha256sum != "" {
 		newSHA256sum := hex.EncodeToString(sha256Writer.Sum(nil))
 		if newSHA256sum != sha256sum {
 			a.client.DeleteBlob(bucket, object, nil)
-			return ObjectInfo{}, traceError(SHA256Mismatch{})
+			return ObjectInfo{}, azureToObjectError(traceError(SHA256Mismatch{}))
 		}
 	}

@@ -333,7 +385,7 @@ func (a AzureObjects) PutObject(bucket, object string, size int64, data io.Reade

 // CopyObject - Copies a blob from source container to destination container.
 // Uses Azure equivalent CopyBlob API.
-func (a AzureObjects) CopyObject(srcBucket, srcObject, destBucket, destObject string, metadata map[string]string) (objInfo ObjectInfo, err error) {
+func (a *azureObjects) CopyObject(srcBucket, srcObject, destBucket, destObject string, metadata map[string]string) (objInfo ObjectInfo, err error) {
 	err = a.client.CopyBlob(destBucket, destObject, a.client.GetBlobURL(srcBucket, srcObject))
 	if err != nil {
 		return objInfo, azureToObjectError(traceError(err), srcBucket, srcObject)
@@ -343,7 +395,7 @@ func (a AzureObjects) CopyObject(srcBucket, srcObject, destBucket, destObject st

 // DeleteObject - Deletes a blob on azure container, uses Azure
 // equivalent DeleteBlob API.
-func (a AzureObjects) DeleteObject(bucket, object string) error {
+func (a *azureObjects) DeleteObject(bucket, object string) error {
 	err := a.client.DeleteBlob(bucket, object, nil)
 	if err != nil {
 		return azureToObjectError(traceError(err), bucket, object)
@@ -355,7 +407,7 @@ func (a AzureObjects) DeleteObject(bucket, object string) error {
 // FIXME: Full ListMultipartUploads is not supported yet. It is supported just enough to help our client libs to
 // support re-uploads. a.client.ListBlobs() can be made to return entries which include uncommitted blobs using
 // which we need to filter out the committed blobs to get the list of uncommitted blobs.
-func (a AzureObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (result ListMultipartsInfo, err error) {
+func (a *azureObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter string, maxUploads int) (result ListMultipartsInfo, err error) {
 	result.MaxUploads = maxUploads
 	result.Prefix = prefix
 	result.Delimiter = delimiter
@@ -366,12 +418,12 @@ func (a AzureObjects) ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMa
 		// NewMultipartUpload.
 		return result, nil
 	}
-	result.Uploads = []uploadMetadata{{prefix, prefix, time.Now().UTC(), "", nil}}
+	result.Uploads = []uploadMetadata{{prefix, prefix, UTCNow(), "", nil}}
 	return result, nil
 }

 // NewMultipartUpload - Use Azure equivalent CreateBlockBlob.
-func (a AzureObjects) NewMultipartUpload(bucket, object string, metadata map[string]string) (uploadID string, err error) {
+func (a *azureObjects) NewMultipartUpload(bucket, object string, metadata map[string]string) (uploadID string, err error) {
 	// Azure doesn't return a unique upload ID and we use object name in place of it. Azure allows multiple uploads to
 	// co-exist as long as the user keeps the blocks uploaded (in block blobs) unique amongst concurrent upload attempts.
 	// Each concurrent client, keeps its own blockID list which it can commit.
@@ -380,14 +432,14 @@ func (a AzureObjects) NewMultipartUpload(bucket, object string, metadata map[str
 		// Store an empty map as a placeholder else ListObjectParts/PutObjectPart will not work properly.
 		metadata = make(map[string]string)
 	} else {
-		metadata = canonicalMetadata(metadata)
+		metadata = s3ToAzureHeaders(metadata)
 	}
 	a.metaInfo.set(uploadID, metadata)
 	return uploadID, nil
 }

 // CopyObjectPart - Not implemented.
-func (a AzureObjects) CopyObjectPart(srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int, startOffset int64, length int64) (info PartInfo, err error) {
+func (a *azureObjects) CopyObjectPart(srcBucket, srcObject, destBucket, destObject string, uploadID string, partID int, startOffset int64, length int64) (info PartInfo, err error) {
 	return info, traceError(NotImplemented{})
 }

@@ -415,39 +467,66 @@ func azureParseBlockID(blockID string) (int, string, error) {
 }

 // PutObjectPart - Use Azure equivalent PutBlockWithLength.
-func (a AzureObjects) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string, sha256sum string) (info PartInfo, err error) {
+func (a *azureObjects) PutObjectPart(bucket, object, uploadID string, partID int, size int64, data io.Reader, md5Hex string, sha256sum string) (info PartInfo, err error) {
 	if meta := a.metaInfo.get(uploadID); meta == nil {
 		return info, traceError(InvalidUploadID{})
 	}
 	var sha256Writer hash.Hash
+	var md5sumWriter hash.Hash
+	var etag string
+
+	var writers []io.Writer
+
 	if sha256sum != "" {
 		sha256Writer = sha256.New()
+		writers = append(writers, sha256Writer)
 	}

-	teeReader := io.TeeReader(data, sha256Writer)
+	if md5Hex != "" {
+		md5sumWriter = md5.New()
+		writers = append(writers, md5sumWriter)
+		etag = md5Hex
+	} else {
+		// Generate random ETag.
+		etag = getMD5Hash([]byte(mustGetUUID()))
+	}

-	id := azureGetBlockID(partID, md5Hex)
+	teeReader := data
+
+	if len(writers) > 0 {
+		teeReader = io.TeeReader(data, io.MultiWriter(writers...))
+	}
+
+	id := azureGetBlockID(partID, etag)
 	err = a.client.PutBlockWithLength(bucket, object, id, uint64(size), teeReader, nil)
 	if err != nil {
 		return info, azureToObjectError(traceError(err), bucket, object)
 	}

+	if md5Hex != "" {
+		newMD5sum := hex.EncodeToString(md5sumWriter.Sum(nil))
+		if newMD5sum != md5Hex {
+			a.client.DeleteBlob(bucket, object, nil)
+			return PartInfo{}, azureToObjectError(traceError(BadDigest{md5Hex, newMD5sum}))
+		}
+	}
+
 	if sha256sum != "" {
 		newSHA256sum := hex.EncodeToString(sha256Writer.Sum(nil))
 		if newSHA256sum != sha256sum {
-			return PartInfo{}, traceError(SHA256Mismatch{})
+			return PartInfo{}, azureToObjectError(traceError(SHA256Mismatch{}))
 		}
 	}

 	info.PartNumber = partID
-	info.ETag = md5Hex
-	info.LastModified = time.Now().UTC()
+	info.ETag = etag
+	info.LastModified = UTCNow()
 	info.Size = size
 	return info, nil
 }

 // ListObjectParts - Use Azure equivalent GetBlockList.
-func (a AzureObjects) ListObjectParts(bucket, object, uploadID string, partNumberMarker int, maxParts int) (result ListPartsInfo, err error) {
+func (a *azureObjects) ListObjectParts(bucket, object, uploadID string, partNumberMarker int, maxParts int) (result ListPartsInfo, err error) {
 	result.Bucket = bucket
 	result.Object = object
 	result.UploadID = uploadID
@@ -478,7 +557,7 @@ func (a AzureObjects) ListObjectParts(bucket, object, uploadID string, partNumbe
 		}
 		result.Parts = append(result.Parts, PartInfo{
 			partID,
-			time.Now().UTC(),
+			UTCNow(),
 			md5Hex,
 			part.Size,
 		})
@@ -496,13 +575,13 @@ func (a AzureObjects) ListObjectParts(bucket, object, uploadID string, partNumbe
 // AbortMultipartUpload - Not Implemented.
 // There is no corresponding API in azure to abort an incomplete upload. The uncommmitted blocks
 // gets deleted after one week.
-func (a AzureObjects) AbortMultipartUpload(bucket, object, uploadID string) error {
+func (a *azureObjects) AbortMultipartUpload(bucket, object, uploadID string) error {
 	a.metaInfo.del(uploadID)
 	return nil
 }

 // CompleteMultipartUpload - Use Azure equivalent PutBlockList.
-func (a AzureObjects) CompleteMultipartUpload(bucket, object, uploadID string, uploadedParts []completePart) (objInfo ObjectInfo, err error) {
+func (a *azureObjects) CompleteMultipartUpload(bucket, object, uploadID string, uploadedParts []completePart) (objInfo ObjectInfo, err error) {
 	meta := a.metaInfo.get(uploadID)
 	if meta == nil {
 		return objInfo, traceError(InvalidUploadID{uploadID})
@@ -530,6 +609,10 @@ func (a AzureObjects) CompleteMultipartUpload(bucket, object, uploadID string, u
 		if err != nil {
 			return objInfo, azureToObjectError(traceError(err), bucket, object)
 		}
+		err = a.client.SetBlobMetadata(bucket, object, nil, meta)
+		if err != nil {
+			return objInfo, azureToObjectError(traceError(err), bucket, object)
+		}
 	}
 	a.metaInfo.del(uploadID)
 	return a.GetObjectInfo(bucket, object)
@@ -592,7 +675,15 @@ func azureListBlobsGetParameters(p storage.ListBlobsParameters) url.Values {
 // storage.ContainerAccessTypePrivate - none in minio terminology
 // As the common denominator for minio and azure is readonly and none, we support
 // these two policies at the bucket level.
-func (a AzureObjects) SetBucketPolicies(bucket string, policies []BucketAccessPolicy) error {
+func (a *azureObjects) SetBucketPolicies(bucket string, policyInfo policy.BucketAccessPolicy) error {
+	var policies []BucketAccessPolicy
+
+	for prefix, policy := range policy.GetPolicies(policyInfo.Statements, bucket) {
+		policies = append(policies, BucketAccessPolicy{
+			Prefix: prefix,
+			Policy: policy,
+		})
+	}
 	prefix := bucket + "/*" // For all objects inside the bucket.
 	if len(policies) != 1 {
 		return traceError(NotImplemented{})
@@ -612,22 +703,25 @@ func (a AzureObjects) SetBucketPolicies(bucket string, policies []BucketAccessPo
 }

 // GetBucketPolicies - Get the container ACL and convert it to canonical []bucketAccessPolicy
-func (a AzureObjects) GetBucketPolicies(bucket string) ([]BucketAccessPolicy, error) {
+func (a *azureObjects) GetBucketPolicies(bucket string) (policy.BucketAccessPolicy, error) {
+	policyInfo := policy.BucketAccessPolicy{Version: "2012-10-17"}
 	perm, err := a.client.GetContainerPermissions(bucket, 0, "")
 	if err != nil {
-		return nil, azureToObjectError(traceError(err), bucket)
+		return policy.BucketAccessPolicy{}, azureToObjectError(traceError(err), bucket)
 	}
 	switch perm.AccessType {
 	case storage.ContainerAccessTypePrivate:
-		return nil, nil
+		// Do nothing
 	case storage.ContainerAccessTypeContainer:
-		return []BucketAccessPolicy{{"", policy.BucketPolicyReadOnly}}, nil
+		policyInfo.Statements = policy.SetPolicy(policyInfo.Statements, policy.BucketPolicyReadOnly, bucket, "")
+	default:
+		return policy.BucketAccessPolicy{}, azureToObjectError(traceError(NotImplemented{}))
 	}
-	return nil, azureToObjectError(traceError(NotImplemented{}))
+	return policyInfo, nil
 }

 // DeleteBucketPolicies - Set the container ACL to "private"
-func (a AzureObjects) DeleteBucketPolicies(bucket string) error {
+func (a *azureObjects) DeleteBucketPolicies(bucket string) error {
 	perm := storage.ContainerPermissions{
 		AccessType:     storage.ContainerAccessTypePrivate,
 		AccessPolicies: nil,
@@ -25,18 +25,33 @@ import (
 )

 // Test canonical metadata.
-func TestCanonicalMetadata(t *testing.T) {
-	metadata := map[string]string{
+func TestS3ToAzureHeaders(t *testing.T) {
+	headers := map[string]string{
 		"accept-encoding":  "gzip",
 		"content-encoding": "gzip",
 	}
-	expectedCanonicalM := map[string]string{
+	expectedHeaders := map[string]string{
 		"Accept-Encoding":  "gzip",
 		"Content-Encoding": "gzip",
 	}
-	actualCanonicalM := canonicalMetadata(metadata)
-	if !reflect.DeepEqual(actualCanonicalM, expectedCanonicalM) {
-		t.Fatalf("Test failed, expected %#v, got %#v", expectedCanonicalM, actualCanonicalM)
+	actualHeaders := s3ToAzureHeaders(headers)
+	if !reflect.DeepEqual(actualHeaders, expectedHeaders) {
+		t.Fatalf("Test failed, expected %#v, got %#v", expectedHeaders, actualHeaders)
+	}
+}
+
+func TestAzureToS3Metadata(t *testing.T) {
+	// Just one testcase. Adding more test cases does not add value to the testcase
+	// as azureToS3Metadata() just adds a prefix.
+	metadata := map[string]string{
+		"First-Name": "myname",
+	}
+	expectedMeta := map[string]string{
+		"X-Amz-Meta-First-Name": "myname",
+	}
+	actualMeta := azureToS3Metadata(metadata)
+	if !reflect.DeepEqual(actualMeta, expectedMeta) {
+		t.Fatalf("Test failed, expected %#v, got %#v", expectedMeta, actualMeta)
 	}
 }

@@ -17,11 +17,12 @@
 package cmd

 import (
-	"bytes"
 	"io"
 	"io/ioutil"
 	"net/http"
+	"strconv"

+	"encoding/hex"
 	"encoding/json"
 	"encoding/xml"

@@ -53,17 +54,23 @@ func (api gatewayAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Re
 		// Signature V2 validation.
 		s3Error := isReqAuthenticatedV2(r)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
 	case authTypeSigned, authTypePresigned:
 		s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
+	case authTypeAnonymous:
+		// No verification needed for anonymous requests.
+	default:
+		// For all unknown auth types return error.
+		writeErrorResponse(w, ErrAccessDenied, r.URL)
+		return
 	}

 	getObjectInfo := objectAPI.GetObjectInfo
@@ -152,6 +159,138 @@ func (api gatewayAPIHandlers) GetObjectHandler(w http.ResponseWriter, r *http.Re
 	}
 }

+// PutObjectHandler - PUT Object
+// ----------
+// This implementation of the PUT operation adds an object to a bucket.
+func (api gatewayAPIHandlers) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
+	objectAPI := api.ObjectAPI()
+	if objectAPI == nil {
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		return
+	}
+
+	// X-Amz-Copy-Source shouldn't be set for this call.
+	if _, ok := r.Header["X-Amz-Copy-Source"]; ok {
+		writeErrorResponse(w, ErrInvalidCopySource, r.URL)
+		return
+	}
+
+	var object, bucket string
+	vars := router.Vars(r)
+	bucket = vars["bucket"]
+	object = vars["object"]
+
+	// Get Content-Md5 sent by client and verify if valid
+	md5Bytes, err := checkValidMD5(r.Header.Get("Content-Md5"))
+	if err != nil {
+		errorIf(err, "Unable to validate content-md5 format.")
+		writeErrorResponse(w, ErrInvalidDigest, r.URL)
+		return
+	}
+
+	/// if Content-Length is unknown/missing, deny the request
+	size := r.ContentLength
+	reqAuthType := getRequestAuthType(r)
+	if reqAuthType == authTypeStreamingSigned {
+		sizeStr := r.Header.Get("x-amz-decoded-content-length")
+		size, err = strconv.ParseInt(sizeStr, 10, 64)
+		if err != nil {
+			errorIf(err, "Unable to parse `x-amz-decoded-content-length` into its integer value", sizeStr)
+			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+			return
+		}
+	}
+	if size == -1 {
+		writeErrorResponse(w, ErrMissingContentLength, r.URL)
+		return
+	}
+
+	/// maximum Upload size for objects in a single operation
+	if isMaxObjectSize(size) {
+		writeErrorResponse(w, ErrEntityTooLarge, r.URL)
+		return
+	}
+
+	// Extract metadata to be saved from incoming HTTP header.
+	metadata := extractMetadataFromHeader(r.Header)
+	if reqAuthType == authTypeStreamingSigned {
+		if contentEncoding, ok := metadata["content-encoding"]; ok {
+			contentEncoding = trimAwsChunkedContentEncoding(contentEncoding)
+			if contentEncoding != "" {
+				// Make sure to trim and save the content-encoding
+				// parameter for a streaming signature which is set
+				// to a custom value for example: "aws-chunked,gzip".
+				metadata["content-encoding"] = contentEncoding
+			} else {
+				// Trimmed content encoding is empty when the header
+				// value is set to "aws-chunked" only.
+
+				// Make sure to delete the content-encoding parameter
+				// for a streaming signature which is set to value
+				// for example: "aws-chunked"
+				delete(metadata, "content-encoding")
+			}
+		}
+	}
+
+	// Make sure we hex encode md5sum here.
+	metadata["etag"] = hex.EncodeToString(md5Bytes)
+
+	sha256sum := ""
+
+	// Lock the object.
+	objectLock := globalNSMutex.NewNSLock(bucket, object)
+	objectLock.Lock()
+	defer objectLock.Unlock()
+
+	var objInfo ObjectInfo
+	switch reqAuthType {
+	case authTypeAnonymous:
+		// Create anonymous object.
+		objInfo, err = objectAPI.AnonPutObject(bucket, object, size, r.Body, metadata, sha256sum)
+	case authTypeStreamingSigned:
+		// Initialize stream signature verifier.
+		reader, s3Error := newSignV4ChunkedReader(r)
+		if s3Error != ErrNone {
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
+			writeErrorResponse(w, s3Error, r.URL)
+			return
+		}
+		objInfo, err = objectAPI.PutObject(bucket, object, size, reader, metadata, sha256sum)
+	case authTypeSignedV2, authTypePresignedV2:
+		s3Error := isReqAuthenticatedV2(r)
+		if s3Error != ErrNone {
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
+			writeErrorResponse(w, s3Error, r.URL)
+			return
+		}
+		objInfo, err = objectAPI.PutObject(bucket, object, size, r.Body, metadata, sha256sum)
+	case authTypePresigned, authTypeSigned:
+		if s3Error := reqSignatureV4Verify(r, serverConfig.GetRegion()); s3Error != ErrNone {
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
+			writeErrorResponse(w, s3Error, r.URL)
+			return
+		}
+		if !skipContentSha256Cksum(r) {
+			sha256sum = r.Header.Get("X-Amz-Content-Sha256")
+		}
+		// Create object.
+		objInfo, err = objectAPI.PutObject(bucket, object, size, r.Body, metadata, sha256sum)
+	default:
+		// For all unknown auth types return error.
+		writeErrorResponse(w, ErrAccessDenied, r.URL)
+		return
+	}
+
+	if err != nil {
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	w.Header().Set("ETag", "\""+objInfo.ETag+"\"")
+	writeSuccessResponseHeadersOnly(w)
+}
+
 // HeadObjectHandler - HEAD Object
 // -----------
 // The HEAD operation retrieves metadata from an object without returning the object itself.
@@ -174,17 +313,23 @@ func (api gatewayAPIHandlers) HeadObjectHandler(w http.ResponseWriter, r *http.R
 		// Signature V2 validation.
 		s3Error := isReqAuthenticatedV2(r)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
 	case authTypeSigned, authTypePresigned:
 		s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
+	case authTypeAnonymous:
+		// No verification needed for anonymous requests.
+	default:
+		// For all unknown auth types return error.
+		writeErrorResponse(w, ErrAccessDenied, r.URL)
+		return
 	}

 	getObjectInfo := objectAPI.GetObjectInfo
@@ -354,37 +499,13 @@ func (api gatewayAPIHandlers) PutBucketPolicyHandler(w http.ResponseWriter, r *h
 		return
 	}

-	{
-		// FIXME: consolidate bucketPolicy and policy.BucketAccessPolicy so that
-		// the verification below is done on the same type.
-		// Parse bucket policy.
-		policyInfo := &bucketPolicy{}
-		err = parseBucketPolicy(bytes.NewReader(policyBytes), policyInfo)
-		if err != nil {
-			errorIf(err, "Unable to parse bucket policy.")
-			writeErrorResponse(w, ErrInvalidPolicyDocument, r.URL)
-			return
-		}
-
-		// Parse check bucket policy.
-		if s3Error := checkBucketPolicyResources(bucket, policyInfo); s3Error != ErrNone {
-			writeErrorResponse(w, toAPIErrorCode(err), r.URL)
-			return
-		}
-	}
-	policyInfo := &policy.BucketAccessPolicy{}
-	if err = json.Unmarshal(policyBytes, policyInfo); err != nil {
+	policyInfo := policy.BucketAccessPolicy{}
+	if err = json.Unmarshal(policyBytes, &policyInfo); err != nil {
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
-	var policies []BucketAccessPolicy
-	for prefix, policy := range policy.GetPolicies(policyInfo.Statements, bucket) {
-		policies = append(policies, BucketAccessPolicy{
-			Prefix: prefix,
-			Policy: policy,
-		})
-	}
-	if err = objAPI.SetBucketPolicies(bucket, policies); err != nil {
+
+	if err = objAPI.SetBucketPolicies(bucket, policyInfo); err != nil {
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
@@ -453,17 +574,14 @@ func (api gatewayAPIHandlers) GetBucketPolicyHandler(w http.ResponseWriter, r *h
 		return
 	}

-	policies, err := objAPI.GetBucketPolicies(bucket)
+	bp, err := objAPI.GetBucketPolicies(bucket)
 	if err != nil {
 		errorIf(err, "Unable to read bucket policy.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
 		return
 	}
-	policyInfo := policy.BucketAccessPolicy{Version: "2012-10-17"}
-	for _, p := range policies {
-		policyInfo.Statements = policy.SetPolicy(policyInfo.Statements, p.Policy, bucket, p.Prefix)
-	}
-	policyBytes, err := json.Marshal(&policyInfo)
+
+	policyBytes, err := json.Marshal(bp)
 	if err != nil {
 		errorIf(err, "Unable to read bucket policy.")
 		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
@@ -499,6 +617,65 @@ func (api gatewayAPIHandlers) ListenBucketNotificationHandler(w http.ResponseWri
 	writeErrorResponse(w, ErrNotImplemented, r.URL)
 }

+// PutBucketHandler - PUT Bucket
+// ----------
+// This implementation of the PUT operation creates a new bucket for authenticated request
+func (api gatewayAPIHandlers) PutBucketHandler(w http.ResponseWriter, r *http.Request) {
+	objectAPI := api.ObjectAPI()
+	if objectAPI == nil {
+		writeErrorResponse(w, ErrServerNotInitialized, r.URL)
+		return
+	}
+
+	// PutBucket does not have any bucket action.
+	s3Error := checkRequestAuthType(r, "", "", globalMinioDefaultRegion)
+	if s3Error == ErrInvalidRegion {
+		// Clients like boto3 send putBucket() call signed with region that is configured.
+		s3Error = checkRequestAuthType(r, "", "", serverConfig.GetRegion())
+	}
+	if s3Error != ErrNone {
+		writeErrorResponse(w, s3Error, r.URL)
+		return
+	}
+
+	vars := router.Vars(r)
+	bucket := vars["bucket"]
+
+	// Validate if incoming location constraint is valid, reject
+	// requests which do not follow valid region requirements.
+	location, s3Error := parseLocationConstraint(r)
+	if s3Error != ErrNone {
+		writeErrorResponse(w, s3Error, r.URL)
+		return
+	}
+
+	// validating region here, because isValidLocationConstraint
+	// reads body which has been read already. So only validating
+	// region here.
+	serverRegion := serverConfig.GetRegion()
+	if serverRegion != location {
+		writeErrorResponse(w, ErrInvalidRegion, r.URL)
+		return
+	}
+
+	bucketLock := globalNSMutex.NewNSLock(bucket, "")
+	bucketLock.Lock()
+	defer bucketLock.Unlock()
+
+	// Proceed to creating a bucket.
+	err := objectAPI.MakeBucketWithLocation(bucket, location)
+	if err != nil {
+		errorIf(err, "Unable to create a bucket.")
+		writeErrorResponse(w, toAPIErrorCode(err), r.URL)
+		return
+	}
+
+	// Make sure to add Location information here only for bucket
+	w.Header().Set("Location", getLocation(r))
+
+	writeSuccessResponseHeadersOnly(w)
+}
+
 // DeleteBucketHandler - Delete bucket
 func (api gatewayAPIHandlers) DeleteBucketHandler(w http.ResponseWriter, r *http.Request) {
 	objectAPI := api.ObjectAPI()
@@ -550,17 +727,23 @@ func (api gatewayAPIHandlers) ListObjectsV1Handler(w http.ResponseWriter, r *htt
 		// Signature V2 validation.
 		s3Error := isReqAuthenticatedV2(r)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
 	case authTypeSigned, authTypePresigned:
 		s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
+	case authTypeAnonymous:
+		// No verification needed for anonymous requests.
+	default:
+		// For all unknown auth types return error.
+		writeErrorResponse(w, ErrAccessDenied, r.URL)
+		return
 	}

 	// Extract all the litsObjectsV1 query params to their native values.
@@ -614,17 +797,23 @@ func (api gatewayAPIHandlers) HeadBucketHandler(w http.ResponseWriter, r *http.R
 		// Signature V2 validation.
 		s3Error := isReqAuthenticatedV2(r)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
 	case authTypeSigned, authTypePresigned:
 		s3Error := isReqAuthenticated(r, serverConfig.GetRegion())
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
+	case authTypeAnonymous:
+		// No verification needed for anonymous requests.
+	default:
+		// For all unknown auth types return error.
+		writeErrorResponse(w, ErrAccessDenied, r.URL)
+		return
 	}

 	getBucketInfo := objectAPI.GetBucketInfo
@@ -660,7 +849,7 @@ func (api gatewayAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r
 		// Signature V2 validation.
 		s3Error := isReqAuthenticatedV2(r)
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
@@ -671,10 +860,16 @@ func (api gatewayAPIHandlers) GetBucketLocationHandler(w http.ResponseWriter, r
 			s3Error = isReqAuthenticated(r, serverConfig.GetRegion())
 		}
 		if s3Error != ErrNone {
-			errorIf(errSignatureMismatch, dumpRequest(r))
+			errorIf(errSignatureMismatch, "%s", dumpRequest(r))
 			writeErrorResponse(w, s3Error, r.URL)
 			return
 		}
+	case authTypeAnonymous:
+		// No verification needed for anonymous requests.
+	default:
+		// For all unknown auth types return error.
+		writeErrorResponse(w, ErrAccessDenied, r.URL)
+		return
 	}

 	getBucketInfo := objectAPI.GetBucketInfo
@@ -17,45 +17,53 @@
 package cmd

 import (
+	"errors"
 	"fmt"
 	"net/url"
 	"os"
+	"runtime"
 	"strings"

 	"github.com/gorilla/mux"
 	"github.com/minio/cli"
-	"github.com/minio/mc/pkg/console"
 )

-var gatewayTemplate = `NAME:
+const azureGatewayTemplate = `NAME:
  {{.HelpName}} - {{.Usage}}

 USAGE:
-  {{.HelpName}} {{if .VisibleFlags}}[FLAGS]{{end}} BACKEND [ENDPOINT]
+  {{.HelpName}} {{if .VisibleFlags}}[FLAGS]{{end}} [ENDPOINT]
 {{if .VisibleFlags}}
 FLAGS:
  {{range .VisibleFlags}}{{.}}
  {{end}}{{end}}
-BACKEND:
-  azure: Microsoft Azure Blob Storage. Default ENDPOINT is https://core.windows.net
+ENDPOINT:
+  Azure server endpoint. Default ENDPOINT is https://core.windows.net

 ENVIRONMENT VARIABLES:
  ACCESS:
-     MINIO_ACCESS_KEY: Username or access key of your storage backend.
-     MINIO_SECRET_KEY: Password or secret key of your storage backend.
+     MINIO_ACCESS_KEY: Username or access key of Azure storage.
+     MINIO_SECRET_KEY: Password or secret key of Azure storage.
+
+  BROWSER:
+     MINIO_BROWSER: To disable web browser access, set this value to "off".

 EXAMPLES:
  1. Start minio gateway server for Azure Blob Storage backend.
      $ export MINIO_ACCESS_KEY=azureaccountname
      $ export MINIO_SECRET_KEY=azureaccountkey
-      $ {{.HelpName}} azure
+      $ {{.HelpName}}
+  2. Start minio gateway server for Azure Blob Storage backend on custom endpoint.
+      $ export MINIO_ACCESS_KEY=azureaccountname
+      $ export MINIO_SECRET_KEY=azureaccountkey
+      $ {{.HelpName}} https://azure.example.com
 `

-var gatewayCmd = cli.Command{
-	Name:               "gateway",
-	Usage:              "Start object storage gateway.",
-	Action:             gatewayMain,
-	CustomHelpTemplate: gatewayTemplate,
+var azureBackendCmd = cli.Command{
+	Name:               "azure",
+	Usage:              "Microsoft Azure Blob Storage.",
+	Action:             azureGatewayMain,
+	CustomHelpTemplate: azureGatewayTemplate,
 	Flags: append(serverFlags,
 		cli.BoolFlag{
 			Name:  "quiet",
@@ -65,11 +73,65 @@ var gatewayCmd = cli.Command{
 	HideHelpCommand: true,
 }

+const s3GatewayTemplate = `NAME:
+  {{.HelpName}} - {{.Usage}}
+
+USAGE:
+  {{.HelpName}} {{if .VisibleFlags}}[FLAGS]{{end}} [ENDPOINT]
+{{if .VisibleFlags}}
+FLAGS:
+  {{range .VisibleFlags}}{{.}}
+  {{end}}{{end}}
+ENDPOINT:
+  S3 server endpoint. Default ENDPOINT is https://s3.amazonaws.com
+
+ENVIRONMENT VARIABLES:
+  ACCESS:
+     MINIO_ACCESS_KEY: Username or access key of S3 storage.
+     MINIO_SECRET_KEY: Password or secret key of S3 storage.
+
+  BROWSER:
+     MINIO_BROWSER: To disable web browser access, set this value to "off".
+
+EXAMPLES:
+  1. Start minio gateway server for AWS S3 backend.
+      $ export MINIO_ACCESS_KEY=accesskey
+      $ export MINIO_SECRET_KEY=secretkey
+      $ {{.HelpName}}
+
+  2. Start minio gateway server for S3 backend on custom endpoint.
+      $ export MINIO_ACCESS_KEY=Q3AM3UQ867SPQQA43P2F
+      $ export MINIO_SECRET_KEY=zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG
+      $ {{.HelpName}} https://play.minio.io:9000
+`
+
+var s3BackendCmd = cli.Command{
+	Name:               "s3",
+	Usage:              "Amazon Simple Storage Service (S3).",
+	Action:             s3GatewayMain,
+	CustomHelpTemplate: s3GatewayTemplate,
+	Flags: append(serverFlags,
+		cli.BoolFlag{
+			Name:  "quiet",
+			Usage: "Disable startup banner.",
+		},
+	),
+	HideHelpCommand: true,
+}
+
+var gatewayCmd = cli.Command{
+	Name:            "gateway",
+	Usage:           "Start object storage gateway.",
+	HideHelpCommand: true,
+	Subcommands:     []cli.Command{azureBackendCmd, s3BackendCmd},
+}
+
 // Represents the type of the gateway backend.
 type gatewayBackend string

 const (
 	azureBackend gatewayBackend = "azure"
+	s3Backend    gatewayBackend = "s3"
 	// Add more backends here.
 )

@@ -79,21 +141,41 @@ func mustGetGatewayCredsFromEnv() (accessKey, secretKey string) {
 	accessKey = os.Getenv("MINIO_ACCESS_KEY")
 	secretKey = os.Getenv("MINIO_SECRET_KEY")
 	if accessKey == "" || secretKey == "" {
-		console.Fatalln("Access and secret keys are mandatory to run Minio gateway server.")
+		fatalIf(errors.New("Missing credentials"), "Access and secret keys are mandatory to run Minio gateway server.")
 	}
 	return accessKey, secretKey
 }

+// Set browser setting from environment variables
+func mustSetBrowserSettingFromEnv() {
+	if browser := os.Getenv("MINIO_BROWSER"); browser != "" {
+		browserFlag, err := ParseBrowserFlag(browser)
+		if err != nil {
+			fatalIf(errors.New("invalid value"), "Unknown value ‘%s’ in MINIO_BROWSER environment variable.", browser)
+		}
+
+		// browser Envs are set globally, this does not represent
+		// if browser is turned off or on.
+		globalIsEnvBrowser = true
+		globalIsBrowserEnabled = bool(browserFlag)
+	}
+}
+
 // Initialize gateway layer depending on the backend type.
 // Supported backend types are
 //
 // - Azure Blob Storage.
 // - Add your favorite backend here.
-func newGatewayLayer(backendType, endPoint, accessKey, secretKey string, secure bool) (GatewayLayer, error) {
-	if gatewayBackend(backendType) != azureBackend {
-		return nil, fmt.Errorf("Unrecognized backend type %s", backendType)
+func newGatewayLayer(backendType gatewayBackend, endpoint, accessKey, secretKey string, secure bool) (GatewayLayer, error) {
+
+	switch gatewayBackend(backendType) {
+	case azureBackend:
+		return newAzureLayer(endpoint, accessKey, secretKey, secure)
+	case s3Backend:
+		return newS3Gateway(endpoint, accessKey, secretKey, secure)
 	}
-	return newAzureLayer(endPoint, accessKey, secretKey, secure)
+
+	return nil, fmt.Errorf("Unrecognized backend type %s", backendType)
 }

 // Initialize a new gateway config.
@@ -102,7 +184,7 @@ func newGatewayLayer(backendType, endPoint, accessKey, secretKey string, secure
 // only used in memory.
 func newGatewayConfig(accessKey, secretKey, region string) error {
 	// Initialize server config.
-	srvCfg := newServerConfigV14()
+	srvCfg := newServerConfigV18()

 	// If env is set for a fresh start, save them to config file.
 	srvCfg.SetCredential(credential{
@@ -110,17 +192,9 @@ func newGatewayConfig(accessKey, secretKey, region string) error {
 		SecretKey: secretKey,
 	})

-	// Set default printing to console.
-	srvCfg.Logger.SetConsole(consoleLogger{true, "error"})
-
 	// Set custom region.
 	srvCfg.SetRegion(region)

-	// Create certs path for SSL configuration.
-	if err := createConfigDir(); err != nil {
-		return err
-	}
-
 	// hold the mutex lock before a new config is assigned.
 	// Save the new config globally.
 	// unlock the mutex.
@@ -138,6 +212,7 @@ func parseGatewayEndpoint(arg string) (endPoint string, secure bool, err error)
 		// Default connection will be "secure".
 		arg = "https://" + arg
 	}
+
 	u, err := url.Parse(arg)
 	if err != nil {
 		return "", false, err
@@ -153,55 +228,100 @@ func parseGatewayEndpoint(arg string) (endPoint string, secure bool, err error)
 	}
 }

-// Handler for 'minio gateway'.
-func gatewayMain(ctx *cli.Context) {
-	if !ctx.Args().Present() || ctx.Args().First() == "help" {
-		cli.ShowCommandHelpAndExit(ctx, "gateway", 1)
+// Validate gateway arguments.
+func validateGatewayArguments(serverAddr, endpointAddr string) error {
+	if err := CheckLocalServerAddr(serverAddr); err != nil {
+		return err
 	}

+	if runtime.GOOS == "darwin" {
+		_, port := mustSplitHostPort(serverAddr)
+		// On macOS, if a process already listens on LOCALIPADDR:PORT, net.Listen() falls back
+		// to IPv6 address i.e minio will start listening on IPv6 address whereas another
+		// (non-)minio process is listening on IPv4 of given port.
+		// To avoid this error situation we check for port availability only for macOS.
+		if err := checkPortAvailability(port); err != nil {
+			return err
+		}
+	}
+
+	if endpointAddr != "" {
+		// Reject the endpoint if it points to the gateway handler itself.
+		sameTarget, err := sameLocalAddrs(endpointAddr, serverAddr)
+		if err != nil {
+			return err
+		}
+		if sameTarget {
+			return errors.New("endpoint points to the local gateway")
+		}
+	}
+	return nil
+}
+
+// Handler for 'minio gateway azure' command line.
+func azureGatewayMain(ctx *cli.Context) {
+	if ctx.Args().Present() && ctx.Args().First() == "help" {
+		cli.ShowCommandHelpAndExit(ctx, "azure", 1)
+	}
+
+	gatewayMain(ctx, azureBackend)
+}
+
+// Handler for 'minio gateway s3' command line.
+func s3GatewayMain(ctx *cli.Context) {
+	if ctx.Args().Present() && ctx.Args().First() == "help" {
+		cli.ShowCommandHelpAndExit(ctx, "s3", 1)
+	}
+
+	gatewayMain(ctx, s3Backend)
+}
+
+// Handler for 'minio gateway'.
+func gatewayMain(ctx *cli.Context, backendType gatewayBackend) {
 	// Fetch access and secret key from env.
 	accessKey, secretKey := mustGetGatewayCredsFromEnv()

-	// Initialize new gateway config.
-	//
-	// TODO: add support for custom region when we add
-	// support for S3 backend storage, currently this can
-	// default to "us-east-1"
-	err := newGatewayConfig(accessKey, secretKey, "us-east-1")
-	if err != nil {
-		console.Fatalf("Unable to initialize gateway config. Error: %s", err)
-	}
+	// Fetch browser env setting
+	mustSetBrowserSettingFromEnv()

-	// Enable console logging.
-	enableConsoleLogger()
+	// Initialize new gateway config.
+
+	newGatewayConfig(accessKey, secretKey, globalMinioDefaultRegion)

 	// Get quiet flag from command line argument.
 	quietFlag := ctx.Bool("quiet") || ctx.GlobalBool("quiet")
+	if quietFlag {
+		log.EnableQuiet()
+	}

-	// First argument is selected backend type.
-	backendType := ctx.Args().First()
+	serverAddr := ctx.String("address")
+	endpointAddr := ctx.Args().Get(0)
+	err := validateGatewayArguments(serverAddr, endpointAddr)
+	fatalIf(err, "Invalid argument")

 	// Second argument is endpoint.	If no endpoint is specified then the
 	// gateway implementation should use a default setting.
-	endPoint, secure, err := parseGatewayEndpoint(ctx.Args().Get(1))
-	if err != nil {
-		console.Fatalf("Unable to parse endpoint. Error: %s", err)
-	}
+	endPoint, secure, err := parseGatewayEndpoint(endpointAddr)
+	fatalIf(err, "Unable to parse endpoint")

 	// Create certs path for SSL configuration.
-	err = createConfigDir()
-	if err != nil {
-		console.Fatalf("Unable to create configuration directory. Error: %s", err)
-	}
+	fatalIf(createConfigDir(), "Unable to create configuration directory")

 	newObject, err := newGatewayLayer(backendType, endPoint, accessKey, secretKey, secure)
-	if err != nil {
-		console.Fatalf("Unable to initialize gateway layer. Error: %s", err)
-	}
+	fatalIf(err, "Unable to initialize gateway layer")

 	initNSLock(false) // Enable local namespace lock.

 	router := mux.NewRouter().SkipClean(true)
+
+	// credentials Envs are set globally.
+	globalIsEnvCreds = true
+
+	// Register web router when its enabled.
+	if globalIsBrowserEnabled {
+		aerr := registerWebRouter(router)
+		fatalIf(aerr, "Unable to configure web browser")
+	}
 	registerGatewayAPIRouter(router, newObject)

 	var handlerFns = []HandlerFunc{
@@ -212,6 +332,13 @@ func gatewayMain(ctx *cli.Context) {
 		// Adds 'crossdomain.xml' policy handler to serve legacy flash clients.
 		setCrossDomainPolicy,
 		// Validates all incoming requests to have a valid date header.
+		// Redirect some pre-defined browser request paths to a static location prefix.
+		setBrowserRedirectHandler,
+		// Validates if incoming request is for restricted buckets.
+		setPrivateBucketHandler,
+		// Adds cache control for all browser requests.
+		setBrowserCacheControlHandler,
+		// Validates all incoming requests to have a valid date header.
 		setTimeValidityHandler,
 		// CORS setting for all browser API requests.
 		setCorsHandler,
@@ -222,12 +349,14 @@ func gatewayMain(ctx *cli.Context) {
 		// routes them accordingly. Client receives a HTTP error for
 		// invalid/unsupported signatures.
 		setAuthHandler,
+		// Add new handlers here.
+
 	}

-	apiServer := NewServerMux(ctx.String("address"), registerHandlers(router, handlerFns...))
+	apiServer := NewServerMux(serverAddr, registerHandlers(router, handlerFns...))

-	// Set if we are SSL enabled S3 gateway.
-	globalIsSSL = isSSL()
+	_, _, globalIsSSL, err = getSSLConfig()
+	fatalIf(err, "Invalid SSL key file")

 	// Start server, automatically configures TLS if certs are available.
 	go func() {
@@ -235,13 +364,10 @@ func gatewayMain(ctx *cli.Context) {
 		if globalIsSSL {
 			cert, key = getPublicCertFile(), getPrivateKeyFile()
 		}
-		if aerr := apiServer.ListenAndServe(cert, key); aerr != nil {
-			console.Fatalf("Failed to start minio server. Error: %s\n", aerr)
-		}
-	}()

-	apiEndPoints, err := finalizeAPIEndpoints(apiServer.Addr)
-	fatalIf(err, "Unable to finalize API endpoints for %s", apiServer.Addr)
+		aerr := apiServer.ListenAndServe(cert, key)
+		fatalIf(aerr, "Failed to start minio server")
+	}()

 	// Once endpoints are finalized, initialize the new object api.
 	globalObjLayerMutex.Lock()
@@ -253,9 +379,12 @@ func gatewayMain(ctx *cli.Context) {
 		mode := ""
 		if gatewayBackend(backendType) == azureBackend {
 			mode = globalMinioModeGatewayAzure
+		} else if gatewayBackend(backendType) == s3Backend {
+			mode = globalMinioModeGatewayS3
 		}
 		checkUpdate(mode)
-		printGatewayStartupMessage(apiEndPoints, accessKey, secretKey, backendType)
+		apiEndpoints := getAPIEndpoints(apiServer.Addr)
+		printGatewayStartupMessage(apiEndpoints, accessKey, secretKey, backendType)
 	}

 	<-globalServiceDoneCh
@@ -16,7 +16,11 @@

 package cmd

-import "testing"
+import (
+	"os"
+	"strings"
+	"testing"
+)

 // Test parseGatewayEndpoint
 func TestParseGatewayEndpoint(t *testing.T) {
@@ -48,3 +52,57 @@ func TestParseGatewayEndpoint(t *testing.T) {
 		}
 	}
 }
+
+func TestSetBrowserFromEnv(t *testing.T) {
+	browser := os.Getenv("MINIO_BROWSER")
+
+	os.Setenv("MINIO_BROWSER", "on")
+	mustSetBrowserSettingFromEnv()
+	if globalIsBrowserEnabled != true {
+		t.Errorf("Expected the response status to be `%t`, but instead found `%t`", globalIsBrowserEnabled, false)
+	}
+
+	os.Setenv("MINIO_BROWSER", "off")
+	mustSetBrowserSettingFromEnv()
+	if globalIsBrowserEnabled != false {
+		t.Errorf("Expected the response status to be `%t`, but instead found `%t`", globalIsBrowserEnabled, true)
+	}
+	os.Setenv("MINIO_BROWSER", "")
+	mustSetBrowserSettingFromEnv()
+	if globalIsBrowserEnabled != false {
+		t.Errorf("Expected the response status to be `%t`, but instead found `%t`", globalIsBrowserEnabled, true)
+	}
+	os.Setenv("MINIO_BROWSER", browser)
+}
+
+// Test validateGatewayArguments
+func TestValidateGatewayArguments(t *testing.T) {
+	nonLoopBackIPs := localIP4.FuncMatch(func(ip string, matchString string) bool {
+		return !strings.HasPrefix(ip, "127.")
+	}, "")
+	if len(nonLoopBackIPs) == 0 {
+		t.Fatalf("No non-loop back IP address found for this host")
+	}
+	nonLoopBackIP := nonLoopBackIPs.ToSlice()[0]
+
+	testCases := []struct {
+		serverAddr   string
+		endpointAddr string
+		valid        bool
+	}{
+		{":9000", "http://localhost:9001", true},
+		{":9000", "http://google.com", true},
+		{"123.123.123.123:9000", "http://localhost:9000", false},
+		{":9000", "http://localhost:9000", false},
+		{":9000", nonLoopBackIP + ":9000", false},
+	}
+	for i, test := range testCases {
+		err := validateGatewayArguments(test.serverAddr, test.endpointAddr)
+		if test.valid && err != nil {
+			t.Errorf("Test %d expected not to return error but got %s", i+1, err)
+		}
+		if !test.valid && err == nil {
+			t.Errorf("Test %d expected to fail but it did not", i+1)
+		}
+	}
+}
@@ -20,15 +20,20 @@ import (
 	"io"

 	router "github.com/gorilla/mux"
+	"github.com/minio/minio-go/pkg/policy"
 )

 // GatewayLayer - Interface to implement gateway mode.
 type GatewayLayer interface {
 	ObjectLayer
+
 	AnonGetObject(bucket, object string, startOffset int64, length int64, writer io.Writer) (err error)
 	AnonGetObjectInfo(bucket, object string) (objInfo ObjectInfo, err error)
-	SetBucketPolicies(string, []BucketAccessPolicy) error
-	GetBucketPolicies(string) ([]BucketAccessPolicy, error)
+
+	AnonPutObject(bucket string, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (ObjectInfo, error)
+
+	SetBucketPolicies(string, policy.BucketAccessPolicy) error
+	GetBucketPolicies(string) (policy.BucketAccessPolicy, error)
 	DeleteBucketPolicies(string) error
 	AnonListObjects(bucket, prefix, marker, delimiter string, maxKeys int) (result ListObjectsInfo, err error)
 	AnonGetBucketInfo(bucket string) (bucketInfo BucketInfo, err error)
@@ -0,0 +1,122 @@
+/*
+ * 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/hex"
+	"io"
+
+	minio "github.com/minio/minio-go"
+)
+
+// AnonPutObject creates a new object anonymously with the incoming data,
+func (l *s3Objects) AnonPutObject(bucket string, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (ObjectInfo, error) {
+	var sha256sumBytes []byte
+
+	var err error
+	if sha256sum != "" {
+		sha256sumBytes, err = hex.DecodeString(sha256sum)
+		if err != nil {
+			return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+		}
+	}
+
+	var md5sumBytes []byte
+	md5sum := metadata["etag"]
+	if md5sum != "" {
+		md5sumBytes, err = hex.DecodeString(md5sum)
+		if err != nil {
+			return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+		}
+		delete(metadata, "etag")
+	}
+
+	oi, err := l.anonClient.PutObject(bucket, object, size, data, md5sumBytes, sha256sumBytes, toMinioClientMetadata(metadata))
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return fromMinioClientObjectInfo(bucket, oi), nil
+}
+
+// AnonGetObject - Get object anonymously
+func (l *s3Objects) AnonGetObject(bucket string, key string, startOffset int64, length int64, writer io.Writer) error {
+	r := minio.NewGetReqHeaders()
+	if err := r.SetRange(startOffset, startOffset+length-1); err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+	object, _, err := l.anonClient.GetObject(bucket, key, r)
+	if err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+
+	defer object.Close()
+
+	if _, err := io.CopyN(writer, object, length); err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+
+	return nil
+}
+
+// AnonGetObjectInfo - Get object info anonymously
+func (l *s3Objects) AnonGetObjectInfo(bucket string, object string) (ObjectInfo, error) {
+	r := minio.NewHeadReqHeaders()
+	oi, err := l.anonClient.StatObject(bucket, object, r)
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return fromMinioClientObjectInfo(bucket, oi), nil
+}
+
+// AnonListObjects - List objects anonymously
+func (l *s3Objects) AnonListObjects(bucket string, prefix string, marker string, delimiter string, maxKeys int) (ListObjectsInfo, error) {
+	result, err := l.anonClient.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
+	if err != nil {
+		return ListObjectsInfo{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	return fromMinioClientListBucketResult(bucket, result), nil
+}
+
+// AnonGetBucketInfo - Get bucket metadata anonymously.
+func (l *s3Objects) AnonGetBucketInfo(bucket string) (BucketInfo, error) {
+	if exists, err := l.anonClient.BucketExists(bucket); err != nil {
+		return BucketInfo{}, s3ToObjectError(traceError(err), bucket)
+	} else if !exists {
+		return BucketInfo{}, traceError(BucketNotFound{Bucket: bucket})
+	}
+
+	buckets, err := l.anonClient.ListBuckets()
+	if err != nil {
+		return BucketInfo{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	for _, bi := range buckets {
+		if bi.Name != bucket {
+			continue
+		}
+
+		return BucketInfo{
+			Name:    bi.Name,
+			Created: bi.CreationDate,
+		}, nil
+	}
+
+	return BucketInfo{}, traceError(BucketNotFound{Bucket: bucket})
+}
@@ -0,0 +1,42 @@
+/*
+ * 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
+
+// HealBucket - Not relevant.
+func (l *s3Objects) HealBucket(bucket string) error {
+	return traceError(NotImplemented{})
+}
+
+// ListBucketsHeal - Not relevant.
+func (l *s3Objects) ListBucketsHeal() (buckets []BucketInfo, err error) {
+	return []BucketInfo{}, traceError(NotImplemented{})
+}
+
+// HealObject - Not relevant.
+func (l *s3Objects) HealObject(bucket string, object string) (int, int, error) {
+	return 0, 0, traceError(NotImplemented{})
+}
+
+// ListObjectsHeal - Not relevant.
+func (l *s3Objects) ListObjectsHeal(bucket string, prefix string, marker string, delimiter string, maxKeys int) (ListObjectsInfo, error) {
+	return ListObjectsInfo{}, traceError(NotImplemented{})
+}
+
+// ListUploadsHeal - Not relevant.
+func (l *s3Objects) ListUploadsHeal(bucket string, prefix string, marker string, uploadIDMarker string, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
+	return ListMultipartsInfo{}, traceError(NotImplemented{})
+}
@@ -0,0 +1,568 @@
+/*
+ * 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/hex"
+	"io"
+	"net/http"
+	"path"
+
+	minio "github.com/minio/minio-go"
+	"github.com/minio/minio-go/pkg/policy"
+)
+
+// s3ToObjectError converts Minio errors to minio object layer errors.
+func s3ToObjectError(err error, params ...string) error {
+	if err == nil {
+		return nil
+	}
+
+	e, ok := err.(*Error)
+	if !ok {
+		// Code should be fixed if this function is called without doing traceError()
+		// Else handling different situations in this function makes this function complicated.
+		errorIf(err, "Expected type *Error")
+		return err
+	}
+
+	err = e.e
+
+	bucket := ""
+	object := ""
+	if len(params) >= 1 {
+		bucket = params[0]
+	}
+	if len(params) == 2 {
+		object = params[1]
+	}
+
+	minioErr, ok := err.(minio.ErrorResponse)
+	if !ok {
+		// We don't interpret non Minio errors. As minio errors will
+		// have StatusCode to help to convert to object errors.
+		return e
+	}
+
+	switch minioErr.Code {
+	case "BucketAlreadyOwnedByYou":
+		err = BucketAlreadyOwnedByYou{}
+	case "BucketNotEmpty":
+		err = BucketNotEmpty{}
+	case "NoSuchBucketPolicy":
+		err = PolicyNotFound{}
+	case "InvalidBucketName":
+		err = BucketNameInvalid{Bucket: bucket}
+	case "NoSuchBucket":
+		err = BucketNotFound{Bucket: bucket}
+	case "NoSuchKey":
+		if object != "" {
+			err = ObjectNotFound{Bucket: bucket, Object: object}
+		} else {
+			err = BucketNotFound{Bucket: bucket}
+		}
+	case "XMinioInvalidObjectName":
+		err = ObjectNameInvalid{}
+	case "AccessDenied":
+		err = PrefixAccessDenied{
+			Bucket: bucket,
+			Object: object,
+		}
+	case "XAmzContentSHA256Mismatch":
+		err = SHA256Mismatch{}
+	}
+
+	e.e = err
+	return e
+}
+
+// s3Objects implements gateway for Minio and S3 compatible object storage servers.
+type s3Objects struct {
+	Client     *minio.Core
+	anonClient *minio.Core
+}
+
+// newS3Gateway returns s3 gatewaylayer
+func newS3Gateway(endpoint string, accessKey, secretKey string, secure bool) (GatewayLayer, error) {
+	if endpoint == "" {
+		endpoint = "s3.amazonaws.com"
+		secure = true
+	}
+
+	// Initialize minio client object.
+	client, err := minio.NewCore(endpoint, accessKey, secretKey, secure)
+	if err != nil {
+		return nil, err
+	}
+
+	anonClient, err := minio.NewCore(endpoint, "", "", secure)
+	if err != nil {
+		return nil, err
+	}
+
+	return &s3Objects{
+		Client:     client,
+		anonClient: anonClient,
+	}, nil
+}
+
+// Shutdown saves any gateway metadata to disk
+// if necessary and reload upon next restart.
+func (l *s3Objects) Shutdown() error {
+	// TODO
+	return nil
+}
+
+// StorageInfo is not relevant to S3 backend.
+func (l *s3Objects) StorageInfo() StorageInfo {
+	return StorageInfo{}
+}
+
+// MakeBucket creates a new container on S3 backend.
+func (l *s3Objects) MakeBucketWithLocation(bucket, location string) error {
+	err := l.Client.MakeBucket(bucket, location)
+	if err != nil {
+		return s3ToObjectError(traceError(err), bucket)
+	}
+	return err
+}
+
+// GetBucketInfo gets bucket metadata..
+func (l *s3Objects) GetBucketInfo(bucket string) (BucketInfo, error) {
+	buckets, err := l.Client.ListBuckets()
+	if err != nil {
+		return BucketInfo{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	for _, bi := range buckets {
+		if bi.Name != bucket {
+			continue
+		}
+
+		return BucketInfo{
+			Name:    bi.Name,
+			Created: bi.CreationDate,
+		}, nil
+	}
+
+	return BucketInfo{}, traceError(BucketNotFound{Bucket: bucket})
+}
+
+// ListBuckets lists all S3 buckets
+func (l *s3Objects) ListBuckets() ([]BucketInfo, error) {
+	buckets, err := l.Client.ListBuckets()
+	if err != nil {
+		return nil, err
+	}
+
+	b := make([]BucketInfo, len(buckets))
+	for i, bi := range buckets {
+		b[i] = BucketInfo{
+			Name:    bi.Name,
+			Created: bi.CreationDate,
+		}
+	}
+
+	return b, err
+}
+
+// DeleteBucket deletes a bucket on S3
+func (l *s3Objects) DeleteBucket(bucket string) error {
+	err := l.Client.RemoveBucket(bucket)
+	if err != nil {
+		return s3ToObjectError(traceError(err), bucket)
+	}
+	return nil
+}
+
+// ListObjects lists all blobs in S3 bucket filtered by prefix
+func (l *s3Objects) ListObjects(bucket string, prefix string, marker string, delimiter string, maxKeys int) (ListObjectsInfo, error) {
+	result, err := l.Client.ListObjects(bucket, prefix, marker, delimiter, maxKeys)
+	if err != nil {
+		return ListObjectsInfo{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	return fromMinioClientListBucketResult(bucket, result), nil
+}
+
+// ListObjectsV2 lists all blobs in S3 bucket filtered by prefix
+func (l *s3Objects) ListObjectsV2(bucket, prefix, continuationToken string, fetchOwner bool, delimiter string, maxKeys int) (ListObjectsV2Info, error) {
+	result, err := l.Client.ListObjectsV2(bucket, prefix, continuationToken, fetchOwner, delimiter, maxKeys)
+	if err != nil {
+		return ListObjectsV2Info{}, s3ToObjectError(traceError(err), bucket)
+	}
+
+	return fromMinioClientListBucketV2Result(bucket, result), nil
+}
+
+// fromMinioClientListBucketV2Result converts minio ListBucketResult to ListObjectsInfo
+func fromMinioClientListBucketV2Result(bucket string, result minio.ListBucketV2Result) ListObjectsV2Info {
+	objects := make([]ObjectInfo, len(result.Contents))
+
+	for i, oi := range result.Contents {
+		objects[i] = fromMinioClientObjectInfo(bucket, oi)
+	}
+
+	prefixes := make([]string, len(result.CommonPrefixes))
+	for i, p := range result.CommonPrefixes {
+		prefixes[i] = p.Prefix
+	}
+
+	return ListObjectsV2Info{
+		IsTruncated: result.IsTruncated,
+		Prefixes:    prefixes,
+		Objects:     objects,
+
+		ContinuationToken:     result.ContinuationToken,
+		NextContinuationToken: result.NextContinuationToken,
+	}
+}
+
+// fromMinioClientListBucketResult converts minio ListBucketResult to ListObjectsInfo
+func fromMinioClientListBucketResult(bucket string, result minio.ListBucketResult) ListObjectsInfo {
+	objects := make([]ObjectInfo, len(result.Contents))
+
+	for i, oi := range result.Contents {
+		objects[i] = fromMinioClientObjectInfo(bucket, oi)
+	}
+
+	prefixes := make([]string, len(result.CommonPrefixes))
+	for i, p := range result.CommonPrefixes {
+		prefixes[i] = p.Prefix
+	}
+
+	return ListObjectsInfo{
+		IsTruncated: result.IsTruncated,
+		NextMarker:  result.NextMarker,
+		Prefixes:    prefixes,
+		Objects:     objects,
+	}
+}
+
+// GetObject reads an object from S3. Supports additional
+// parameters like offset and length which are synonymous with
+// HTTP Range requests.
+//
+// startOffset indicates the starting read location of the object.
+// length indicates the total length of the object.
+func (l *s3Objects) GetObject(bucket string, key string, startOffset int64, length int64, writer io.Writer) error {
+	r := minio.NewGetReqHeaders()
+
+	if length < 0 && length != -1 {
+		return s3ToObjectError(traceError(errInvalidArgument), bucket, key)
+	}
+
+	if startOffset >= 0 && length >= 0 {
+		if err := r.SetRange(startOffset, startOffset+length-1); err != nil {
+			return s3ToObjectError(traceError(err), bucket, key)
+		}
+	}
+	object, _, err := l.Client.GetObject(bucket, key, r)
+	if err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+
+	defer object.Close()
+
+	if _, err := io.Copy(writer, object); err != nil {
+		return s3ToObjectError(traceError(err), bucket, key)
+	}
+	return nil
+}
+
+// fromMinioClientObjectInfo converts minio ObjectInfo to gateway ObjectInfo
+func fromMinioClientObjectInfo(bucket string, oi minio.ObjectInfo) ObjectInfo {
+	userDefined := fromMinioClientMetadata(oi.Metadata)
+	userDefined["Content-Type"] = oi.ContentType
+
+	return ObjectInfo{
+		Bucket:          bucket,
+		Name:            oi.Key,
+		ModTime:         oi.LastModified,
+		Size:            oi.Size,
+		ETag:            oi.ETag,
+		UserDefined:     userDefined,
+		ContentType:     oi.ContentType,
+		ContentEncoding: oi.Metadata.Get("Content-Encoding"),
+	}
+}
+
+// GetObjectInfo reads object info and replies back ObjectInfo
+func (l *s3Objects) GetObjectInfo(bucket string, object string) (objInfo ObjectInfo, err error) {
+	r := minio.NewHeadReqHeaders()
+	oi, err := l.Client.StatObject(bucket, object, r)
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return fromMinioClientObjectInfo(bucket, oi), nil
+}
+
+// PutObject creates a new object with the incoming data,
+func (l *s3Objects) PutObject(bucket string, object string, size int64, data io.Reader, metadata map[string]string, sha256sum string) (ObjectInfo, error) {
+	var sha256sumBytes []byte
+
+	var err error
+	if sha256sum != "" {
+		sha256sumBytes, err = hex.DecodeString(sha256sum)
+		if err != nil {
+			return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+		}
+	}
+
+	var md5sumBytes []byte
+	md5sum := metadata["etag"]
+	if md5sum != "" {
+		md5sumBytes, err = hex.DecodeString(md5sum)
+		if err != nil {
+			return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+		}
+		delete(metadata, "etag")
+	}
+
+	oi, err := l.Client.PutObject(bucket, object, size, data, md5sumBytes, sha256sumBytes, toMinioClientMetadata(metadata))
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return fromMinioClientObjectInfo(bucket, oi), nil
+}
+
+// CopyObject copies a blob from source container to destination container.
+func (l *s3Objects) CopyObject(srcBucket string, srcObject string, destBucket string, destObject string, metadata map[string]string) (ObjectInfo, error) {
+	err := l.Client.CopyObject(destBucket, destObject, path.Join(srcBucket, srcObject), minio.CopyConditions{})
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), srcBucket, srcObject)
+	}
+
+	oi, err := l.GetObjectInfo(destBucket, destObject)
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), destBucket, destObject)
+	}
+
+	return oi, nil
+}
+
+// DeleteObject deletes a blob in bucket
+func (l *s3Objects) DeleteObject(bucket string, object string) error {
+	err := l.Client.RemoveObject(bucket, object)
+	if err != nil {
+		return s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return nil
+}
+
+// fromMinioClientUploadMetadata converts ObjectMultipartInfo to uploadMetadata
+func fromMinioClientUploadMetadata(omi minio.ObjectMultipartInfo) uploadMetadata {
+	return uploadMetadata{
+		Object:    omi.Key,
+		UploadID:  omi.UploadID,
+		Initiated: omi.Initiated,
+	}
+}
+
+// fromMinioClientListMultipartsInfo converts minio ListMultipartUploadsResult to ListMultipartsInfo
+func fromMinioClientListMultipartsInfo(lmur minio.ListMultipartUploadsResult) ListMultipartsInfo {
+	uploads := make([]uploadMetadata, len(lmur.Uploads))
+
+	for i, um := range lmur.Uploads {
+		uploads[i] = fromMinioClientUploadMetadata(um)
+	}
+
+	commonPrefixes := make([]string, len(lmur.CommonPrefixes))
+	for i, cp := range lmur.CommonPrefixes {
+		commonPrefixes[i] = cp.Prefix
+	}
+
+	return ListMultipartsInfo{
+		KeyMarker:          lmur.KeyMarker,
+		UploadIDMarker:     lmur.UploadIDMarker,
+		NextKeyMarker:      lmur.NextKeyMarker,
+		NextUploadIDMarker: lmur.NextUploadIDMarker,
+		MaxUploads:         int(lmur.MaxUploads),
+		IsTruncated:        lmur.IsTruncated,
+		Uploads:            uploads,
+		Prefix:             lmur.Prefix,
+		Delimiter:          lmur.Delimiter,
+		CommonPrefixes:     commonPrefixes,
+		EncodingType:       lmur.EncodingType,
+	}
+
+}
+
+// ListMultipartUploads lists all multipart uploads.
+func (l *s3Objects) ListMultipartUploads(bucket string, prefix string, keyMarker string, uploadIDMarker string, delimiter string, maxUploads int) (ListMultipartsInfo, error) {
+	result, err := l.Client.ListMultipartUploads(bucket, prefix, keyMarker, uploadIDMarker, delimiter, maxUploads)
+	if err != nil {
+		return ListMultipartsInfo{}, err
+	}
+
+	return fromMinioClientListMultipartsInfo(result), nil
+}
+
+// fromMinioClientMetadata converts minio metadata to map[string]string
+func fromMinioClientMetadata(metadata map[string][]string) map[string]string {
+	mm := map[string]string{}
+	for k, v := range metadata {
+		mm[http.CanonicalHeaderKey(k)] = v[0]
+	}
+	return mm
+}
+
+// toMinioClientMetadata converts metadata to map[string][]string
+func toMinioClientMetadata(metadata map[string]string) map[string][]string {
+	mm := map[string][]string{}
+	for k, v := range metadata {
+		mm[http.CanonicalHeaderKey(k)] = []string{v}
+	}
+	return mm
+}
+
+// NewMultipartUpload upload object in multiple parts
+func (l *s3Objects) NewMultipartUpload(bucket string, object string, metadata map[string]string) (uploadID string, err error) {
+	return l.Client.NewMultipartUpload(bucket, object, toMinioClientMetadata(metadata))
+}
+
+// CopyObjectPart copy part of object to other bucket and object
+func (l *s3Objects) CopyObjectPart(srcBucket string, srcObject string, destBucket string, destObject string, uploadID string, partID int, startOffset int64, length int64) (info PartInfo, err error) {
+	// FIXME: implement CopyObjectPart
+	return PartInfo{}, traceError(NotImplemented{})
+}
+
+// fromMinioClientObjectPart converts minio ObjectPart to PartInfo
+func fromMinioClientObjectPart(op minio.ObjectPart) PartInfo {
+	return PartInfo{
+		Size:         op.Size,
+		ETag:         canonicalizeETag(op.ETag),
+		LastModified: op.LastModified,
+		PartNumber:   op.PartNumber,
+	}
+}
+
+// PutObjectPart puts a part of object in bucket
+func (l *s3Objects) PutObjectPart(bucket string, object string, uploadID string, partID int, size int64, data io.Reader, md5Hex string, sha256sum string) (PartInfo, error) {
+	md5HexBytes, err := hex.DecodeString(md5Hex)
+	if err != nil {
+		return PartInfo{}, err
+	}
+
+	sha256sumBytes, err := hex.DecodeString(sha256sum)
+	if err != nil {
+		return PartInfo{}, err
+	}
+
+	info, err := l.Client.PutObjectPart(bucket, object, uploadID, partID, size, data, md5HexBytes, sha256sumBytes)
+	if err != nil {
+		return PartInfo{}, err
+	}
+
+	return fromMinioClientObjectPart(info), nil
+}
+
+// fromMinioClientObjectParts converts minio ObjectPart to PartInfo
+func fromMinioClientObjectParts(parts []minio.ObjectPart) []PartInfo {
+	toParts := make([]PartInfo, len(parts))
+	for i, part := range parts {
+		toParts[i] = fromMinioClientObjectPart(part)
+	}
+	return toParts
+}
+
+// fromMinioClientListPartsInfo converts minio ListObjectPartsResult to ListPartsInfo
+func fromMinioClientListPartsInfo(lopr minio.ListObjectPartsResult) ListPartsInfo {
+	return ListPartsInfo{
+		UploadID:             lopr.UploadID,
+		Bucket:               lopr.Bucket,
+		Object:               lopr.Key,
+		StorageClass:         "",
+		PartNumberMarker:     lopr.PartNumberMarker,
+		NextPartNumberMarker: lopr.NextPartNumberMarker,
+		MaxParts:             lopr.MaxParts,
+		IsTruncated:          lopr.IsTruncated,
+		EncodingType:         lopr.EncodingType,
+		Parts:                fromMinioClientObjectParts(lopr.ObjectParts),
+	}
+}
+
+// ListObjectParts returns all object parts for specified object in specified bucket
+func (l *s3Objects) ListObjectParts(bucket string, object string, uploadID string, partNumberMarker int, maxParts int) (ListPartsInfo, error) {
+	result, err := l.Client.ListObjectParts(bucket, object, uploadID, partNumberMarker, maxParts)
+	if err != nil {
+		return ListPartsInfo{}, err
+	}
+
+	return fromMinioClientListPartsInfo(result), nil
+}
+
+// AbortMultipartUpload aborts a ongoing multipart upload
+func (l *s3Objects) AbortMultipartUpload(bucket string, object string, uploadID string) error {
+	return l.Client.AbortMultipartUpload(bucket, object, uploadID)
+}
+
+// toMinioClientCompletePart converts completePart to minio CompletePart
+func toMinioClientCompletePart(part completePart) minio.CompletePart {
+	return minio.CompletePart{
+		ETag:       part.ETag,
+		PartNumber: part.PartNumber,
+	}
+}
+
+// toMinioClientCompleteParts converts []completePart to minio []CompletePart
+func toMinioClientCompleteParts(parts []completePart) []minio.CompletePart {
+	mparts := make([]minio.CompletePart, len(parts))
+	for i, part := range parts {
+		mparts[i] = toMinioClientCompletePart(part)
+	}
+	return mparts
+}
+
+// CompleteMultipartUpload completes ongoing multipart upload and finalizes object
+func (l *s3Objects) CompleteMultipartUpload(bucket string, object string, uploadID string, uploadedParts []completePart) (ObjectInfo, error) {
+	err := l.Client.CompleteMultipartUpload(bucket, object, uploadID, toMinioClientCompleteParts(uploadedParts))
+	if err != nil {
+		return ObjectInfo{}, s3ToObjectError(traceError(err), bucket, object)
+	}
+
+	return l.GetObjectInfo(bucket, object)
+}
+
+// SetBucketPolicies sets policy on bucket
+func (l *s3Objects) SetBucketPolicies(bucket string, policyInfo policy.BucketAccessPolicy) error {
+	if err := l.Client.PutBucketPolicy(bucket, policyInfo); err != nil {
+		return s3ToObjectError(traceError(err), bucket, "")
+	}
+
+	return nil
+}
+
+// GetBucketPolicies will get policy on bucket
+func (l *s3Objects) GetBucketPolicies(bucket string) (policy.BucketAccessPolicy, error) {
+	policyInfo, err := l.Client.GetBucketPolicy(bucket)
+	if err != nil {
+		return policy.BucketAccessPolicy{}, s3ToObjectError(traceError(err), bucket, "")
+	}
+	return policyInfo, nil
+}
+
+// DeleteBucketPolicies deletes all policies on bucket
+func (l *s3Objects) DeleteBucketPolicies(bucket string) error {
+	if err := l.Client.PutBucketPolicy(bucket, policy.BucketAccessPolicy{}); err != nil {
+		return s3ToObjectError(traceError(err), bucket, "")
+	}
+	return nil
+}
--- a/Show More
+++ b/Show More