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authorTrond Myklebust <trond.myklebust@hammerspace.com>2019-07-29 18:25:00 +0100
committerTrond Myklebust <trond.myklebust@hammerspace.com>2019-08-04 22:35:40 -0400
commite3c8dc761ead061da2220ee8f8132f729ac3ddfe (patch)
treed54d830c19ce0710909e808e0ffa9498f9cf5bb2 /fs/nfs
parentad11408970df79d5f481aa9964e91f183133424c (diff)
downloadlinux-stericsson-e3c8dc761ead061da2220ee8f8132f729ac3ddfe.tar.gz
NFSv4: Check the return value of update_open_stateid()
Ensure that we always check the return value of update_open_stateid() so that we can retry if the update of local state failed. This fixes infinite looping on state recovery. Fixes: e23008ec81ef3 ("NFSv4 reduce attribute requests for open reclaim") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: stable@vger.kernel.org # v3.7+
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index c9e14ce0b7b2..3e0b93f2b61a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1915,8 +1915,9 @@ _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);
+ if (!update_open_stateid(state, &data->o_res.stateid,
+ NULL, data->o_arg.fmode))
+ return ERR_PTR(-EAGAIN);
refcount_inc(&state->count);
return state;
@@ -1981,8 +1982,11 @@ _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
if (data->o_res.delegation_type != 0)
nfs4_opendata_check_deleg(data, state);
- update_open_stateid(state, &data->o_res.stateid, NULL,
- data->o_arg.fmode);
+ if (!update_open_stateid(state, &data->o_res.stateid,
+ NULL, data->o_arg.fmode)) {
+ nfs4_put_open_state(state);
+ state = ERR_PTR(-EAGAIN);
+ }
out:
nfs_release_seqid(data->o_arg.seqid);
return state;