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add pre-conditions support for PUT calls during replication (#15674)

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PUT shall only proceed if pre-conditions are met, the new
code uses

- x-minio-source-mtime
- x-minio-source-etag

to verify if the object indeed needs to be replicated
or not, allowing us to avoid StatObject() call.
This commit is contained in:
Harshavardhana
2022-09-14 18:44:04 -07:00
committed by GitHub
parent b910904fa6
commit 124544d834
7 changed files with 271 additions and 42 deletions
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cmd/erasure-object.go
+13 -5
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@@ -915,6 +915,16 @@ func (er erasureObjects) PutObject(ctx context.Context, bucket string, object st
func (er erasureObjects) putObject(ctx context.Context, bucket string, object string, r *PutObjReader, opts ObjectOptions) (objInfo ObjectInfo, err error) {
auditObjectErasureSet(ctx, object, &er)
if opts.CheckPrecondFn != nil {
obj, err := er.getObjectInfo(ctx, bucket, object, opts)
if err != nil {
return objInfo, err
}
if opts.CheckPrecondFn(obj) {
return objInfo, PreConditionFailed{}
}
}
data := r.Reader
userDefined := cloneMSS(opts.UserDefined)
@@ -1146,11 +1156,9 @@ func (er erasureObjects) putObject(ctx context.Context, bucket string, object st
})
}
if userDefined["etag"] == "" {
userDefined["etag"] = r.MD5CurrentHexString()
if opts.PreserveETag != "" {
userDefined["etag"] = opts.PreserveETag
}
userDefined["etag"] = r.MD5CurrentHexString()
if opts.PreserveETag != "" {
userDefined["etag"] = opts.PreserveETag
}
// Guess content-type from the extension if possible.