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Fix data loss: add lock for metacache (#4664)

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Co-authored-by: wang wusong <wangwusong@virtaitech.com>
This commit is contained in:
wusong 2023-07-12 13:23:32 +08:00 committed by GitHub
parent 89542db2d0
commit 0cb9ddd8ec
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 19 additions and 18 deletions
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37
weed/mount/meta_cache/meta_cache.go
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@ -3,6 +3,7 @@ package meta_cache
import (
"context"
"os"
"sync"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/filer/leveldb"
@ -17,7 +18,7 @@ import (
type MetaCache struct {
root util.FullPath
localStore filer.VirtualFilerStore
// sync.RWMutex
sync.RWMutex
uidGidMapper *UidGidMapper
markCachedFn func(fullpath util.FullPath)
isCachedFn func(fullpath util.FullPath) bool
@ -57,8 +58,8 @@ func openMetaStore(dbFolder string) filer.VirtualFilerStore {
}
func (mc *MetaCache) InsertEntry(ctx context.Context, entry *filer.Entry) error {
//mc.Lock()
//defer mc.Unlock()
mc.Lock()
defer mc.Unlock()
return mc.doInsertEntry(ctx, entry)
}
@ -67,10 +68,10 @@ func (mc *MetaCache) doInsertEntry(ctx context.Context, entry *filer.Entry) erro
}
func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath util.FullPath, newEntry *filer.Entry) error {
//mc.Lock()
//defer mc.Unlock()
mc.Lock()
defer mc.Unlock()
entry, err := mc.FindEntry(ctx, oldPath)
entry, err := mc.localStore.FindEntry(ctx, oldPath)
if err != nil && err != filer_pb.ErrNotFound {
glog.Errorf("Metacache: find entry error: %v", err)
return err
@ -105,14 +106,14 @@ func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath uti
}
func (mc *MetaCache) UpdateEntry(ctx context.Context, entry *filer.Entry) error {
//mc.Lock()
//defer mc.Unlock()
mc.Lock()
defer mc.Unlock()
return mc.localStore.UpdateEntry(ctx, entry)
}
func (mc *MetaCache) FindEntry(ctx context.Context, fp util.FullPath) (entry *filer.Entry, err error) {
//mc.RLock()
//defer mc.RUnlock()
mc.RLock()
defer mc.RUnlock()
entry, err = mc.localStore.FindEntry(ctx, fp)
if err != nil {
return nil, err
@ -122,19 +123,19 @@ func (mc *MetaCache) FindEntry(ctx context.Context, fp util.FullPath) (entry *fi
}
func (mc *MetaCache) DeleteEntry(ctx context.Context, fp util.FullPath) (err error) {
//mc.Lock()
//defer mc.Unlock()
mc.Lock()
defer mc.Unlock()
return mc.localStore.DeleteEntry(ctx, fp)
}
func (mc *MetaCache) DeleteFolderChildren(ctx context.Context, fp util.FullPath) (err error) {
//mc.Lock()
//defer mc.Unlock()
mc.Lock()
defer mc.Unlock()
return mc.localStore.DeleteFolderChildren(ctx, fp)
}
func (mc *MetaCache) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) error {
//mc.RLock()
//defer mc.RUnlock()
mc.RLock()
defer mc.RUnlock()
if !mc.isCachedFn(dirPath) {
// if this request comes after renaming, it should be fine
@ -152,8 +153,8 @@ func (mc *MetaCache) ListDirectoryEntries(ctx context.Context, dirPath util.Full
}
func (mc *MetaCache) Shutdown() {
//mc.Lock()
//defer mc.Unlock()
mc.Lock()
defer mc.Unlock()
mc.localStore.Shutdown()
}