// Do a possible commit before read request in case there is buffered data
// inside DFSClient which has been flushed but not synced.
internal virtual int CommitBeforeRead(DFSClient dfsClient, FileHandle fileHandle,
long commitOffset)
{
int status;
OpenFileCtx openFileCtx = fileContextCache.Get(fileHandle);
if (openFileCtx == null)
{
if (Log.IsDebugEnabled())
{
Log.Debug("No opened stream for fileId: " + fileHandle.GetFileId() + " commitOffset="
+ commitOffset + ". Return success in this case.");
}
status = Nfs3Status.Nfs3Ok;
}
else
{
// commit request triggered by read won't create pending comment obj
OpenFileCtx.COMMIT_STATUS ret = openFileCtx.CheckCommit(dfsClient, commitOffset,
null, 0, null, true);
switch (ret)
{
case OpenFileCtx.COMMIT_STATUS.CommitFinished:
case OpenFileCtx.COMMIT_STATUS.CommitInactiveCtx:
{
status = Nfs3Status.Nfs3Ok;
break;
}
case OpenFileCtx.COMMIT_STATUS.CommitInactiveWithPendingWrite:
case OpenFileCtx.COMMIT_STATUS.CommitError:
{
status = Nfs3Status.Nfs3errIo;
break;
}
case OpenFileCtx.COMMIT_STATUS.CommitWait:
case OpenFileCtx.COMMIT_STATUS.CommitSpecialWait:
{
status = Nfs3Status.Nfs3errJukebox;
break;
}
case OpenFileCtx.COMMIT_STATUS.CommitSpecialSuccess:
{
// Read beyond eof could result in partial read
status = Nfs3Status.Nfs3Ok;
break;
}
default:
{
Log.Error("Should not get commit return code: " + ret.ToString());
throw new RuntimeException("Should not get commit return code: " + ret.ToString()
);
}
}
}
return(status);
}
internal virtual void HandleCommit(DFSClient dfsClient, FileHandle fileHandle, long
commitOffset, Org.Jboss.Netty.Channel.Channel channel, int xid, Nfs3FileAttributes
preOpAttr)
{
long startTime = Runtime.NanoTime();
int status;
OpenFileCtx openFileCtx = fileContextCache.Get(fileHandle);
if (openFileCtx == null)
{
Log.Info("No opened stream for fileId: " + fileHandle.GetFileId() + " commitOffset="
+ commitOffset + ". Return success in this case.");
status = Nfs3Status.Nfs3Ok;
}
else
{
OpenFileCtx.COMMIT_STATUS ret = openFileCtx.CheckCommit(dfsClient, commitOffset,
channel, xid, preOpAttr, false);
switch (ret)
{
case OpenFileCtx.COMMIT_STATUS.CommitFinished:
case OpenFileCtx.COMMIT_STATUS.CommitInactiveCtx:
{
status = Nfs3Status.Nfs3Ok;
break;
}
case OpenFileCtx.COMMIT_STATUS.CommitInactiveWithPendingWrite:
case OpenFileCtx.COMMIT_STATUS.CommitError:
{
status = Nfs3Status.Nfs3errIo;
break;
}
case OpenFileCtx.COMMIT_STATUS.CommitWait:
{
// Do nothing. Commit is async now.
return;
}
case OpenFileCtx.COMMIT_STATUS.CommitSpecialWait:
{
status = Nfs3Status.Nfs3errJukebox;
break;
}
case OpenFileCtx.COMMIT_STATUS.CommitSpecialSuccess:
{
status = Nfs3Status.Nfs3Ok;
break;
}
default:
{
Log.Error("Should not get commit return code: " + ret.ToString());
throw new RuntimeException("Should not get commit return code: " + ret.ToString()
);
}
}
}
// Send out the response
Nfs3FileAttributes postOpAttr = null;
try
{
postOpAttr = GetFileAttr(dfsClient, new FileHandle(preOpAttr.GetFileId()), iug);
}
catch (IOException e1)
{
Log.Info("Can't get postOpAttr for fileId: " + preOpAttr.GetFileId(), e1);
}
WccData fileWcc = new WccData(Nfs3Utils.GetWccAttr(preOpAttr), postOpAttr);
COMMIT3Response response = new COMMIT3Response(status, fileWcc, Nfs3Constant.WriteCommitVerf
);
RpcProgramNfs3.metrics.AddCommit(Nfs3Utils.GetElapsedTime(startTime));
Nfs3Utils.WriteChannelCommit(channel, response.Serialize(new XDR(), xid, new VerifierNone
()), xid);
}