void handleCommit(
DFSClient dfsClient,
FileHandle fileHandle,
long commitOffset,
Channel channel,
int xid,
Nfs3FileAttributes preOpAttr) {
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.NFS3_OK;
} else {
COMMIT_STATUS ret =
openFileCtx.checkCommit(dfsClient, commitOffset, channel, xid, preOpAttr, false);
switch (ret) {
case COMMIT_FINISHED:
case COMMIT_INACTIVE_CTX:
status = Nfs3Status.NFS3_OK;
break;
case COMMIT_INACTIVE_WITH_PENDING_WRITE:
case COMMIT_ERROR:
status = Nfs3Status.NFS3ERR_IO;
break;
case COMMIT_WAIT:
// Do nothing. Commit is async now.
return;
case COMMIT_SPECIAL_WAIT:
status = Nfs3Status.NFS3ERR_JUKEBOX;
break;
case COMMIT_SPECIAL_SUCCESS:
status = Nfs3Status.NFS3_OK;
break;
default:
LOG.error("Should not get commit return code:" + ret.name());
throw new RuntimeException("Should not get commit return code:" + ret.name());
}
}
// 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.WRITE_COMMIT_VERF);
Nfs3Utils.writeChannelCommit(
channel, response.serialize(new XDR(), xid, new VerifierNone()), xid);
}
// Do a possible commit before read request in case there is buffered data
// inside DFSClient which has been flushed but not synced.
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.NFS3_OK;
} else {
COMMIT_STATUS ret = openFileCtx.checkCommit(dfsClient, commitOffset, null, 0, null, true);
switch (ret) {
case COMMIT_FINISHED:
case COMMIT_INACTIVE_CTX:
status = Nfs3Status.NFS3_OK;
break;
case COMMIT_INACTIVE_WITH_PENDING_WRITE:
case COMMIT_ERROR:
status = Nfs3Status.NFS3ERR_IO;
break;
case COMMIT_WAIT:
case COMMIT_SPECIAL_WAIT:
/**
* This should happen rarely in some possible cases, such as read request arrives before
* DFSClient is able to quickly flush data to DN, or Prerequisite writes is not available.
* Won't wait since we don't want to block read.
*/
status = Nfs3Status.NFS3ERR_JUKEBOX;
break;
case COMMIT_SPECIAL_SUCCESS:
// Read beyond eof could result in partial read
status = Nfs3Status.NFS3_OK;
break;
default:
LOG.error("Should not get commit return code:" + ret.name());
throw new RuntimeException("Should not get commit return code:" + ret.name());
}
}
return status;
}
