}
@Override
public WRITE3Response write(XDR xdr, Channel channel, int xid,
SecurityHandler securityHandler, InetAddress client) {
WRITE3Response response = new WRITE3Response(Nfs3Status.NFS3_OK);
DFSClient dfsClient = clientCache.getDfsClient(securityHandler.getUser());
if (dfsClient == null) {
response.setStatus(Nfs3Status.NFS3ERR_SERVERFAULT);
return response;
}
WRITE3Request request = null;
try {
request = new WRITE3Request(xdr);
} catch (IOException e) {
LOG.error("Invalid WRITE request");
return new WRITE3Response(Nfs3Status.NFS3ERR_INVAL);
}
long offset = request.getOffset();
int count = request.getCount();
WriteStableHow stableHow = request.getStableHow();
byte[] data = request.getData().array();
if (data.length < count) {
LOG.error("Invalid argument, data size is less than count in request");
return new WRITE3Response(Nfs3Status.NFS3ERR_INVAL);
}
FileHandle handle = request.getHandle();
if (LOG.isDebugEnabled()) {
LOG.debug("NFS WRITE fileId: " + handle.getFileId() + " offset: "
+ offset + " length:" + count + " stableHow:" + stableHow.getValue()
+ " xid:" + xid);
}
Nfs3FileAttributes preOpAttr = null;
try {
preOpAttr = writeManager.getFileAttr(dfsClient, handle, iug);
if (preOpAttr == null) {
LOG.error("Can't get path for fileId:" + handle.getFileId());
return new WRITE3Response(Nfs3Status.NFS3ERR_STALE);
}
if (!checkAccessPrivilege(client, AccessPrivilege.READ_WRITE)) {
return new WRITE3Response(Nfs3Status.NFS3ERR_ACCES, new WccData(
Nfs3Utils.getWccAttr(preOpAttr), preOpAttr), 0, stableHow,
Nfs3Constant.WRITE_COMMIT_VERF);
}
if (LOG.isDebugEnabled()) {
LOG.debug("requesed offset=" + offset + " and current filesize="
+ preOpAttr.getSize());
}
writeManager.handleWrite(dfsClient, request, channel, xid, preOpAttr);
} catch (IOException e) {
LOG.info("Error writing to fileId " + handle.getFileId() + " at offset "
+ offset + " and length " + data.length, e);
// Try to return WccData
Nfs3FileAttributes postOpAttr = null;
try {
postOpAttr = writeManager.getFileAttr(dfsClient, handle, iug);
} catch (IOException e1) {
LOG.info("Can't get postOpAttr for fileId: " + handle.getFileId(), e1);
}
WccAttr attr = preOpAttr == null ? null : Nfs3Utils.getWccAttr(preOpAttr);
WccData fileWcc = new WccData(attr, postOpAttr);
return new WRITE3Response(Nfs3Status.NFS3ERR_IO, fileWcc, 0,
request.getStableHow(), Nfs3Constant.WRITE_COMMIT_VERF);
}
return null;
}