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fix: ignoring O_DIRECT in case of erasure single disk (#15734)

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fixes #15733 
fixes #15735
This commit is contained in:
Anis Elleuch 2022-09-22 18:41:06 +01:00 committed by GitHub
parent 9d6fddcfdf
commit 6e84283c66
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 33 additions and 28 deletions
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61
cmd/xl-storage.go
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@ -261,36 +261,19 @@ func newXLStorage(ep Endpoint) (s *xlStorage, err error) {
s.formatData = formatData
s.formatFileInfo = formatFi
if len(s.formatData) == 0 { // Unformatted disk check if O_DIRECT is supported.
// Check if backend is writable and supports O_DIRECT
uuid := mustGetUUID()
filePath := pathJoin(s.diskPath, ".writable-check-"+uuid+".tmp")
w, err := s.openFileDirect(filePath, os.O_CREATE|os.O_WRONLY|os.O_EXCL)
if err != nil {
// relax single drive mode without O_DIRECT support
if globalIsErasureSD && errors.Is(err, errUnsupportedDisk) {
s.oDirect = false
} else {
return s, err
}
}
_, err = w.Write(alignedBuf)
w.Close()
if err != nil {
if isSysErrInvalidArg(err) {
err = errUnsupportedDisk
}
// relax single drive mode without O_DIRECT support
if globalIsErasureSD && errors.Is(err, errUnsupportedDisk) {
s.oDirect = false
} else {
return s, err
}
} else {
// Return an error if ODirect is not supported
// unless it is a single erasure disk mode
if err := s.checkODirectDiskSupport(); err == nil {
s.oDirect = true
} else {
if globalIsErasureSD && errors.Is(err, errUnsupportedDisk) {
s.oDirect = false
} else {
return s, err
}
}
renameAll(filePath, pathJoin(s.diskPath, minioMetaTmpDeletedBucket, uuid))
if len(s.formatData) == 0 {
// Create all necessary bucket folders if possible.
if err = makeFormatErasureMetaVolumes(s); err != nil {
return nil, err
@ -304,7 +287,6 @@ func newXLStorage(ep Endpoint) (s *xlStorage, err error) {
s.diskID = format.Erasure.This
s.formatLastCheck = time.Now()
s.formatLegacy = format.Erasure.DistributionAlgo == formatErasureVersionV2DistributionAlgoV1
s.oDirect = true
}
// Success.
@ -388,6 +370,29 @@ func (s *xlStorage) Healing() *healingTracker {
return &h
}
// checkODirectDiskSupport asks the disk to write some data
// with O_DIRECT support, return an error if any and return
// errUnsupportedDisk if there is no O_DIRECT support
func (s *xlStorage) checkODirectDiskSupport() error {
// Check if backend is writable and supports O_DIRECT
uuid := mustGetUUID()
filePath := pathJoin(s.diskPath, ".writable-check-"+uuid+".tmp")
defer renameAll(filePath, pathJoin(s.diskPath, minioMetaTmpDeletedBucket, uuid))
w, err := s.openFileDirect(filePath, os.O_CREATE|os.O_WRONLY|os.O_EXCL)
if err != nil {
return err
}
_, err = w.Write(alignedBuf)
w.Close()
if err != nil {
if isSysErrInvalidArg(err) {
err = errUnsupportedDisk
}
}
return err
}
// readsMetadata and returns disk mTime information for xl.meta
func (s *xlStorage) readMetadataWithDMTime(ctx context.Context, itemPath string) ([]byte, time.Time, error) {
if contextCanceled(ctx) {