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ns-lock: lock namespace during FS object operations. (#2896)

This commit is contained in:
Krishna Srinivas 2016-10-10 22:50:04 +05:30 committed by Harshavardhana
parent 0d031c432b
commit 268b96058f
1 changed files with 22 additions and 0 deletions
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22
cmd/fs-v1.go
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@ -223,6 +223,13 @@ func (fs fsObjects) GetObject(bucket, object string, offset int64, length int64,
return traceError(InvalidRange{offset, length, fi.Size})
}
// get a random ID for lock instrumentation.
opsID := getOpsID()
// Lock the object before reading.
nsMutex.RLock(bucket, object, opsID)
defer nsMutex.RUnlock(bucket, object, opsID)
var totalLeft = length
bufSize := int64(readSizeV1)
if length > 0 && bufSize > length {
@ -426,6 +433,13 @@ func (fs fsObjects) PutObject(bucket string, object string, size int64, data io.
}
}
// get a random ID for lock instrumentation.
opsID := getOpsID()
// Lock the object before comitting the object.
nsMutex.RLock(bucket, object, opsID)
defer nsMutex.RUnlock(bucket, object, opsID)
// Entire object was written to the temp location, now it's safe to rename it to the actual location.
err = fs.storage.RenameFile(minioMetaBucket, tempObj, bucket, object)
if err != nil {
@ -461,6 +475,14 @@ func (fs fsObjects) DeleteObject(bucket, object string) error {
if !IsValidObjectName(object) {
return traceError(ObjectNameInvalid{Bucket: bucket, Object: object})
}
// get a random ID for lock instrumentation.
opsID := getOpsID()
// Lock the object before deleting so that an in progress GetObject does not return
// corrupt data or there is no race with a PutObject.
nsMutex.RLock(bucket, object, opsID)
defer nsMutex.RUnlock(bucket, object, opsID)
err := fs.storage.DeleteFile(minioMetaBucket, path.Join(bucketMetaPrefix, bucket, object, fsMetaJSONFile))
if err != nil && err != errFileNotFound {
return toObjectErr(traceError(err), bucket, object)