remove all bucket metadata

fix https://github.com/chrislusf/seaweedfs/issues/2118

weed/filer/abstract_sql/abstract_sql_store.go

@@ -32,6 +32,9 @@ type AbstractSqlStore struct {
 	dbsLock            sync.Mutex
 }
 
+func (store *AbstractSqlStore) CanDropWholeBucket() bool {
+	return store.SupportBucketTable
+}
 func (store *AbstractSqlStore) OnBucketCreation(bucket string) {
 	store.dbsLock.Lock()
 	defer store.dbsLock.Unlock()

weed/filer/filer_delete_entry.go

@@ -71,7 +71,7 @@ func (f *Filer) doBatchDeleteFolderMetaAndData(ctx context.Context, entry *Entry
 
 	lastFileName := ""
 	includeLastFile := false
-	if !isDeletingBucket {
+	if !isDeletingBucket || !f.Store.CanDropWholeBucket() {
 		for {
 			entries, _, err := f.ListDirectoryEntries(ctx, entry.FullPath, lastFileName, includeLastFile, PaginationSize, "", "", "")
 			if err != nil {

weed/filer/filerstore.go

@@ -43,4 +43,5 @@ type FilerStore interface {
 type BucketAware interface {
 	OnBucketCreation(bucket string)
 	OnBucketDeletion(bucket string)
+	IsDropBucketAltogether() bool
 }

weed/filer/filerstore_wrapper.go

@@ -23,6 +23,7 @@ type VirtualFilerStore interface {
 	AddPathSpecificStore(path string, storeId string, store FilerStore)
 	OnBucketCreation(bucket string)
 	OnBucketDeletion(bucket string)
+	CanDropWholeBucket() bool
 }
 
 type FilerStoreWrapper struct {
@@ -42,6 +43,13 @@ func NewFilerStoreWrapper(store FilerStore) *FilerStoreWrapper {
 	}
 }
 
+func (fsw *FilerStoreWrapper) CanDropWholeBucket() bool {
+	if ba, ok := fsw.defaultStore.(BucketAware); ok {
+		return ba.IsDropBucketAltogether()
+	}
+	return false
+}
+
 func (fsw *FilerStoreWrapper) OnBucketCreation(bucket string) {
 	for _, store := range fsw.storeIdToStore {
 		if ba, ok := store.(BucketAware); ok {