NFSv4.1: remove GETATTR from ds commits

Any COMMIT compound directed to a data server needs to have the
GETATTR calls suppressed.  We here, make sure the field we are testing
(data->lseg) is set and refcounted correctly.

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

3 files changed, 16 insertions, 7 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index bcc29bdc9bee..5d61cccc8d4d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3217,8 +3217,12 @@ static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
         struct nfs_server *server = NFS_SERVER(data->inode);
-        
-        data->args.bitmask = server->cache_consistency_bitmask;
+
+        if (data->lseg) {
+                data->args.bitmask = NULL;
+                data->res.fattr = NULL;
+        } else
+                data->args.bitmask = server->cache_consistency_bitmask;
         if (!data->write_done_cb)
                 data->write_done_cb = nfs4_commit_done_cb;
         data->res.server = server;
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 0cf560f77884..07cdf925c524 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2294,7 +2294,8 @@ static void nfs4_xdr_enc_commit(struct rpc_rqst *req, struct xdr_stream *xdr,
         encode_sequence(xdr, &args->seq_args, &hdr);
         encode_putfh(xdr, args->fh, &hdr);
         encode_commit(xdr, args, &hdr);
-        encode_getfattr(xdr, args->bitmask, &hdr);
+        if (args->bitmask)
+                encode_getfattr(xdr, args->bitmask, &hdr);
         encode_nops(&hdr);
 }
 
@@ -5723,8 +5724,9 @@ static int nfs4_xdr_dec_commit(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
         status = decode_commit(xdr, res);
         if (status)
                 goto out;
-        decode_getfattr(xdr, res->fattr, res->server,
-                        !RPC_IS_ASYNC(rqstp->rq_task));
+        if (res->fattr)
+                decode_getfattr(xdr, res->fattr, res->server,
+                                !RPC_IS_ASYNC(rqstp->rq_task));
 out:
         return status;
 }
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 6927a18b6891..cae5d160d835 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1295,6 +1295,7 @@ static void nfs_commitdata_release(void *data)
 {
         struct nfs_write_data *wdata = data;
 
+        put_lseg(wdata->lseg);
         put_nfs_open_context(wdata->args.context);
         nfs_commit_free(wdata);
 }
@@ -1338,7 +1339,8 @@ static int nfs_initiate_commit(struct nfs_write_data *data, struct rpc_clnt *cln
  * Set up the argument/result storage required for the RPC call.
  */
 static void nfs_init_commit(struct nfs_write_data *data,
-                            struct list_head *head)
+                            struct list_head *head,
+                            struct pnfs_layout_segment *lseg)
 {
         struct nfs_page *first = nfs_list_entry(head->next);
         struct inode *inode = first->wb_context->path.dentry->d_inode;
@@ -1350,6 +1352,7 @@ static void nfs_init_commit(struct nfs_write_data *data,
 
         data->inode       = inode;
         data->cred        = first->wb_context->cred;
+        data->lseg        = lseg; /* reference transferred */
         data->mds_ops     = &nfs_commit_ops;
 
         data->args.fh     = NFS_FH(data->inode);
@@ -1393,7 +1396,7 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how)
                 goto out_bad;
 
         /* Set up the argument struct */
-        nfs_init_commit(data, head);
+        nfs_init_commit(data, head, NULL);
         return nfs_initiate_commit(data, NFS_CLIENT(inode), data->mds_ops, how);
  out_bad:
         nfs_retry_commit(head, NULL);