NFSv4: don't reprocess cached open CLAIM_PREVIOUS

Cached opens have already been handled by _nfs4_opendata_reclaim_to_nfs4_state
and can safely skip being reprocessed, but must still call update_open_stateid
to make sure that all active fmodes are recovered.

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Cc: stable@vger.kernel.org # 3.7.x: f494a6071d3: NFSv4: fix NULL dereference
Cc: stable@vger.kernel.org # 3.7.x: a43ec98b72a: NFSv4: don't fail on missin
Cc: stable@vger.kernel.org # 3.7.x
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d3c4255..259f8be 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1317,10 +1317,13 @@ _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
        struct nfs4_state *state = data->state;
        int ret;
 
-       /* allow cached opens (!rpc_done && !rpc_status) */
-       if (!data->rpc_done && data->rpc_status) {
-               ret = data->rpc_status;
-               goto err;
+       if (!data->rpc_done) {
+               if (data->rpc_status) {
+                       ret = data->rpc_status;
+                       goto err;
+               }
+               /* cached opens have already been processed */
+               goto update;
        }
 
        ret = nfs_refresh_inode(inode, &data->f_attr);
@@ -1329,6 +1332,7 @@ _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
 
        if (data->o_res.delegation_type != 0)
                nfs4_opendata_check_deleg(data, state);
+update:
        update_open_stateid(state, &data->o_res.stateid, NULL,
                            data->o_arg.fmode);
        atomic_inc(&state->count);