Nfs3FileAttributes postOpAttr = new Nfs3FileAttributes(latestAttr);
// Send response immediately for unstable write
if (request.getStableHow() == WriteStableHow.UNSTABLE) {
WccData fileWcc = new WccData(preOpAttr, postOpAttr);
WRITE3Response response = new WRITE3Response(Nfs3Status.NFS3_OK,
fileWcc, count, stableHow, Nfs3Constant.WRITE_COMMIT_VERF);
Nfs3Utils.writeChannel(channel, response.send(new XDR(), xid));
writeCtx.setReplied(true);
}
} else if (offset > nextOffset) {
LOG.info("Add new write to the list but not update nextOffset:"
+ nextOffset);
WriteCtx writeCtx = new WriteCtx(request.getHandle(),
request.getOffset(), request.getCount(), request.getStableHow(),
request.getData().array(), channel, xid, false, DataState.ALLOW_DUMP);
addWrite(writeCtx);
// Check if need to dump some pending requests to file
checkDump(request.getCount());
updateLastAccessTime();
Nfs3FileAttributes postOpAttr = new Nfs3FileAttributes(latestAttr);
// In test, noticed some Linux client sends a batch (e.g., 1MB)
// of reordered writes and won't send more writes until it gets
// responses of the previous batch. So here send response immediately for
// unstable non-sequential write
if (request.getStableHow() == WriteStableHow.UNSTABLE) {
WccData fileWcc = new WccData(preOpAttr, postOpAttr);
WRITE3Response response = new WRITE3Response(Nfs3Status.NFS3_OK,
fileWcc, count, stableHow, Nfs3Constant.WRITE_COMMIT_VERF);
Nfs3Utils.writeChannel(channel, response.send(new XDR(), xid));
writeCtx.setReplied(true);
}
} else {
// offset < nextOffset
LOG.warn("(offset,count,nextOffset):" + "(" + offset + "," + count + ","
+ nextOffset + ")");
WccData wccData = new WccData(preOpAttr, null);
WRITE3Response response;
if (offset + count > nextOffset) {
LOG.warn("Haven't noticed any partial overwrite out of a sequential file"
+ "write requests, so treat it as a real random write, no support.");
response = new WRITE3Response(Nfs3Status.NFS3ERR_INVAL, wccData, 0,
WriteStableHow.UNSTABLE, 0);
} else {
if (LOG.isDebugEnabled()) {
LOG.debug("Process perfectOverWrite");
}
response = processPerfectOverWrite(dfsClient, offset, count, stableHow,
request.getData().array(),
Nfs3Utils.getFileIdPath(request.getHandle()), wccData, iug);
}
updateLastAccessTime();
Nfs3Utils.writeChannel(channel, response.send(new XDR(), xid));
}
}