/// <exception cref="Org.Apache.Hadoop.FS.UnresolvedLinkException"/>
/// <exception cref="Org.Apache.Hadoop.Hdfs.Protocol.QuotaExceededException"/>
internal static INodeSymlink UnprotectedAddSymlink(FSDirectory fsd, INodesInPath
iip, byte[] localName, long id, string target, long mtime, long atime, PermissionStatus
perm)
{
System.Diagnostics.Debug.Assert(fsd.HasWriteLock());
INodeSymlink symlink = new INodeSymlink(id, null, perm, mtime, atime, target);
symlink.SetLocalName(localName);
return(fsd.AddINode(iip, symlink) != null ? symlink : null);
}
/// <exception cref="System.IO.IOException"/>
private void Save(OutputStream @out, INodeSymlink n)
{
FSImageFormatProtobuf.SaverContext state = parent.GetSaverContext();
FsImageProto.INodeSection.INodeSymlink.Builder b = FsImageProto.INodeSection.INodeSymlink
.NewBuilder().SetPermission(BuildPermissionStatus(n, state.GetStringMap())).SetTarget
(ByteString.CopyFrom(n.GetSymlink())).SetModificationTime(n.GetModificationTime(
)).SetAccessTime(n.GetAccessTime());
FsImageProto.INodeSection.INode r = ((FsImageProto.INodeSection.INode)BuildINodeCommon
(n).SetType(FsImageProto.INodeSection.INode.Type.Symlink).SetSymlink(b).Build());
r.WriteDelimitedTo(@out);
}
private INodeSymlink LoadINodeSymlink(FsImageProto.INodeSection.INode n)
{
System.Diagnostics.Debug.Assert(n.GetType() == FsImageProto.INodeSection.INode.Type
.Symlink);
FsImageProto.INodeSection.INodeSymlink s = n.GetSymlink();
PermissionStatus permissions = LoadPermission(s.GetPermission(), parent.GetLoaderContext
().GetStringTable());
INodeSymlink sym = new INodeSymlink(n.GetId(), n.GetName().ToByteArray(), permissions
, s.GetModificationTime(), s.GetAccessTime(), s.GetTarget().ToStringUtf8());
return(sym);
}
/// <summary>
/// Serialize a
/// <see cref="INodeSymlink"/>
/// node
/// </summary>
/// <param name="node">The node to write</param>
/// <param name="out">
/// The
/// <see cref="System.IO.DataOutput"/>
/// where the fields are written
/// </param>
/// <exception cref="System.IO.IOException"/>
private static void WriteINodeSymlink(INodeSymlink node, DataOutput @out)
{
WriteLocalName(node, @out);
@out.WriteLong(node.GetId());
@out.WriteShort(0);
// replication
@out.WriteLong(0);
// modification time
@out.WriteLong(0);
// access time
@out.WriteLong(0);
// preferred block size
@out.WriteInt(-2);
// # of blocks
Text.WriteString(@out, node.GetSymlinkString());
WritePermissionStatus(node, @out);
}
/// <summary>Add the given symbolic link to the fs.</summary>
/// <remarks>Add the given symbolic link to the fs. Record it in the edits log.</remarks>
/// <exception cref="System.IO.IOException"/>
private static INodeSymlink AddSymlink(FSDirectory fsd, string path, INodesInPath
iip, string target, PermissionStatus dirPerms, bool createParent, bool logRetryCache
)
{
long mtime = Time.Now();
byte[] localName = iip.GetLastLocalName();
if (createParent)
{
KeyValuePair <INodesInPath, string> e = FSDirMkdirOp.CreateAncestorDirectories(fsd
, iip, dirPerms);
if (e == null)
{
return(null);
}
iip = INodesInPath.Append(e.Key, null, localName);
}
string userName = dirPerms.GetUserName();
long id = fsd.AllocateNewInodeId();
PermissionStatus perm = new PermissionStatus(userName, null, FsPermission.GetDefault
());
INodeSymlink newNode = UnprotectedAddSymlink(fsd, iip.GetExistingINodes(), localName
, id, target, mtime, mtime, perm);
if (newNode == null)
{
NameNode.stateChangeLog.Info("addSymlink: failed to add " + path);
return(null);
}
fsd.GetEditLog().LogSymlink(path, target, mtime, mtime, newNode, logRetryCache);
if (NameNode.stateChangeLog.IsDebugEnabled())
{
NameNode.stateChangeLog.Debug("addSymlink: " + path + " is added");
}
return(newNode);
}