/// <summary>Delete a snapshot of a snapshottable directory</summary> /// <param name="snapshotRoot">The snapshottable directory</param> /// <param name="snapshotName">The name of the to-be-deleted snapshot</param> /// <exception cref="System.IO.IOException"/> internal static INode.BlocksMapUpdateInfo DeleteSnapshot(FSDirectory fsd, SnapshotManager snapshotManager, string snapshotRoot, string snapshotName, bool logRetryCache) { INodesInPath iip = fsd.GetINodesInPath4Write(snapshotRoot); if (fsd.IsPermissionEnabled()) { FSPermissionChecker pc = fsd.GetPermissionChecker(); fsd.CheckOwner(pc, iip); } INode.BlocksMapUpdateInfo collectedBlocks = new INode.BlocksMapUpdateInfo(); ChunkedArrayList <INode> removedINodes = new ChunkedArrayList <INode>(); fsd.WriteLock(); try { snapshotManager.DeleteSnapshot(iip, snapshotName, collectedBlocks, removedINodes); fsd.RemoveFromInodeMap(removedINodes); } finally { fsd.WriteUnlock(); } removedINodes.Clear(); fsd.GetEditLog().LogDeleteSnapshot(snapshotRoot, snapshotName, logRetryCache); return(collectedBlocks); }