internal static Org.Apache.Hadoop.Hdfs.Server.Namenode.INodesInPath FromINode(INode
inode)
{
int depth = 0;
int index;
INode tmp = inode;
while (tmp != null)
{
depth++;
tmp = tmp.GetParent();
}
byte[][] path = new byte[depth][];
INode[] inodes = new INode[depth];
tmp = inode;
index = depth;
while (tmp != null)
{
index--;
path[index] = tmp.GetKey();
inodes[index] = tmp;
tmp = tmp.GetParent();
}
return(new Org.Apache.Hadoop.Hdfs.Server.Namenode.INodesInPath(inodes, path));
}
/// <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);
}
/// <summary>for snapshot file.</summary>
/// <exception cref="System.Exception"/>
public virtual void TestSnapshotPathINodes()
{
// Create a snapshot for the dir, and check the inodes for the path
// pointing to a snapshot file
hdfs.AllowSnapshot(sub1);
hdfs.CreateSnapshot(sub1, "s1");
// The path when accessing the snapshot file of file1 is
// /TestSnapshot/sub1/.snapshot/s1/file1
string snapshotPath = sub1.ToString() + "/.snapshot/s1/file1";
string[] names = INode.GetPathNames(snapshotPath);
byte[][] components = INode.GetPathComponents(names);
INodesInPath nodesInPath = INodesInPath.Resolve(fsdir.rootDir, components, false);
// Length of inodes should be (components.length - 1), since we will ignore
// ".snapshot"
NUnit.Framework.Assert.AreEqual(nodesInPath.Length(), components.Length - 1);
// SnapshotRootIndex should be 3: {root, Testsnapshot, sub1, s1, file1}
Org.Apache.Hadoop.Hdfs.Server.Namenode.Snapshot.Snapshot snapshot = GetSnapshot(nodesInPath
, "s1", 3);
AssertSnapshot(nodesInPath, true, snapshot, 3);
// Check the INode for file1 (snapshot file)
INode snapshotFileNode = nodesInPath.GetLastINode();
AssertINodeFile(snapshotFileNode, file1);
NUnit.Framework.Assert.IsTrue(snapshotFileNode.GetParent().IsWithSnapshot());
// Call getExistingPathINodes and request only one INode.
nodesInPath = INodesInPath.Resolve(fsdir.rootDir, components, false);
NUnit.Framework.Assert.AreEqual(nodesInPath.Length(), components.Length - 1);
AssertSnapshot(nodesInPath, true, snapshot, 3);
// Check the INode for file1 (snapshot file)
AssertINodeFile(nodesInPath.GetLastINode(), file1);
// Resolve the path "/TestSnapshot/sub1/.snapshot"
string dotSnapshotPath = sub1.ToString() + "/.snapshot";
names = INode.GetPathNames(dotSnapshotPath);
components = INode.GetPathComponents(names);
nodesInPath = INodesInPath.Resolve(fsdir.rootDir, components, false);
// The number of INodes returned should still be components.length
// since we put a null in the inode array for ".snapshot"
NUnit.Framework.Assert.AreEqual(nodesInPath.Length(), components.Length);
// No SnapshotRoot dir is included in the resolved inodes
AssertSnapshot(nodesInPath, true, snapshot, -1);
// The last INode should be null, the last but 1 should be sub1
NUnit.Framework.Assert.IsNull(nodesInPath.GetLastINode());
NUnit.Framework.Assert.AreEqual(nodesInPath.GetINode(-2).GetFullPathName(), sub1.
ToString());
NUnit.Framework.Assert.IsTrue(nodesInPath.GetINode(-2).IsDirectory());
string[] invalidPathComponent = new string[] { "invalidDir", "foo", ".snapshot",
"bar" };
Path invalidPath = new Path(invalidPathComponent[0]);
for (int i = 1; i < invalidPathComponent.Length; i++)
{
invalidPath = new Path(invalidPath, invalidPathComponent[i]);
try
{
hdfs.GetFileStatus(invalidPath);
NUnit.Framework.Assert.Fail();
}
catch (FileNotFoundException fnfe)
{
System.Console.Out.WriteLine("The exception is expected: " + fnfe);
}
}
hdfs.DeleteSnapshot(sub1, "s1");
hdfs.DisallowSnapshot(sub1);
}
/// <summary>
/// If a default ACL is defined on a parent directory, then copies that default
/// ACL to a newly created child file or directory.
/// </summary>
/// <param name="child">INode newly created child</param>
public static void CopyINodeDefaultAcl(INode child)
{
INodeDirectory parent = child.GetParent();
AclFeature parentAclFeature = parent.GetAclFeature();
if (parentAclFeature == null || !(child.IsFile() || child.IsDirectory()))
{
return;
}
// Split parent's entries into access vs. default.
IList <AclEntry> featureEntries = GetEntriesFromAclFeature(parent.GetAclFeature());
ScopedAclEntries scopedEntries = new ScopedAclEntries(featureEntries);
IList <AclEntry> parentDefaultEntries = scopedEntries.GetDefaultEntries();
// The parent may have an access ACL but no default ACL. If so, exit.
if (parentDefaultEntries.IsEmpty())
{
return;
}
// Pre-allocate list size for access entries to copy from parent.
IList <AclEntry> accessEntries = Lists.NewArrayListWithCapacity(parentDefaultEntries
.Count);
FsPermission childPerm = child.GetFsPermission();
// Copy each default ACL entry from parent to new child's access ACL.
bool parentDefaultIsMinimal = AclUtil.IsMinimalAcl(parentDefaultEntries);
foreach (AclEntry entry in parentDefaultEntries)
{
AclEntryType type = entry.GetType();
string name = entry.GetName();
AclEntry.Builder builder = new AclEntry.Builder().SetScope(AclEntryScope.Access).
SetType(type).SetName(name);
// The child's initial permission bits are treated as the mode parameter,
// which can filter copied permission values for owner, mask and other.
FsAction permission;
if (type == AclEntryType.User && name == null)
{
permission = entry.GetPermission().And(childPerm.GetUserAction());
}
else
{
if (type == AclEntryType.Group && parentDefaultIsMinimal)
{
// This only happens if the default ACL is a minimal ACL: exactly 3
// entries corresponding to owner, group and other. In this case,
// filter the group permissions.
permission = entry.GetPermission().And(childPerm.GetGroupAction());
}
else
{
if (type == AclEntryType.Mask)
{
// Group bits from mode parameter filter permission of mask entry.
permission = entry.GetPermission().And(childPerm.GetGroupAction());
}
else
{
if (type == AclEntryType.Other)
{
permission = entry.GetPermission().And(childPerm.GetOtherAction());
}
else
{
permission = entry.GetPermission();
}
}
}
}
builder.SetPermission(permission);
accessEntries.AddItem(builder.Build());
}
// A new directory also receives a copy of the parent's default ACL.
IList <AclEntry> defaultEntries = child.IsDirectory() ? parentDefaultEntries : Sharpen.Collections
.EmptyList <AclEntry>();
FsPermission newPerm;
if (!AclUtil.IsMinimalAcl(accessEntries) || !defaultEntries.IsEmpty())
{
// Save the new ACL to the child.
child.AddAclFeature(CreateAclFeature(accessEntries, defaultEntries));
newPerm = CreateFsPermissionForExtendedAcl(accessEntries, childPerm);
}
else
{
// The child is receiving a minimal ACL.
newPerm = CreateFsPermissionForMinimalAcl(accessEntries, childPerm);
}
child.SetPermission(newPerm);
}