/// <summary>
/// Delete a path from the name space
/// Update the count at each ancestor directory with quota
/// </summary>
/// <param name="iip">the inodes resolved from the path</param>
/// <param name="collectedBlocks">blocks collected from the deleted path</param>
/// <param name="removedINodes">inodes that should be removed from inodeMap</param>
/// <param name="mtime">the time the inode is removed</param>
/// <returns>the number of inodes deleted; 0 if no inodes are deleted.</returns>
private static long UnprotectedDelete(FSDirectory fsd, INodesInPath iip, INode.BlocksMapUpdateInfo
collectedBlocks, IList <INode> removedINodes, long mtime)
{
System.Diagnostics.Debug.Assert(fsd.HasWriteLock());
// check if target node exists
INode targetNode = iip.GetLastINode();
if (targetNode == null)
{
return(-1);
}
// record modification
int latestSnapshot = iip.GetLatestSnapshotId();
targetNode.RecordModification(latestSnapshot);
// Remove the node from the namespace
long removed = fsd.RemoveLastINode(iip);
if (removed == -1)
{
return(-1);
}
// set the parent's modification time
INodeDirectory parent = targetNode.GetParent();
parent.UpdateModificationTime(mtime, latestSnapshot);
fsd.UpdateCountForDelete(targetNode, iip);
if (removed == 0)
{
return(0);
}
// collect block and update quota
if (!targetNode.IsInLatestSnapshot(latestSnapshot))
{
targetNode.DestroyAndCollectBlocks(fsd.GetBlockStoragePolicySuite(), collectedBlocks
, removedINodes);
}
else
{
QuotaCounts counts = targetNode.CleanSubtree(fsd.GetBlockStoragePolicySuite(), Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot
.CurrentStateId, latestSnapshot, collectedBlocks, removedINodes);
removed = counts.GetNameSpace();
fsd.UpdateCountNoQuotaCheck(iip, iip.Length() - 1, counts.Negation());
}
if (NameNode.stateChangeLog.IsDebugEnabled())
{
NameNode.stateChangeLog.Debug("DIR* FSDirectory.unprotectedDelete: " + iip.GetPath
() + " is removed");
}
return(removed);
}
/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.QuotaExceededException"/>
internal virtual bool CleanDst(BlockStoragePolicySuite bsps, INode.BlocksMapUpdateInfo
collectedBlocks)
{
Preconditions.CheckState(oldDstChild != null);
IList <INode> removedINodes = new ChunkedArrayList <INode>();
bool filesDeleted;
if (!oldDstChild.IsInLatestSnapshot(dstIIP.GetLatestSnapshotId()))
{
oldDstChild.DestroyAndCollectBlocks(bsps, collectedBlocks, removedINodes);
filesDeleted = true;
}
else
{
filesDeleted = oldDstChild.CleanSubtree(bsps, Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot
.CurrentStateId, dstIIP.GetLatestSnapshotId(), collectedBlocks, removedINodes).GetNameSpace
() >= 0;
}
fsd.GetFSNamesystem().RemoveLeasesAndINodes(src, removedINodes, false);
return(filesDeleted);
}
