From: Trond Myklebust trond.myklebust@hammerspace.com
commit e3c8dc761ead061da2220ee8f8132f729ac3ddfe upstream.
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+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/nfs/nfs4proc.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
--- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1878,8 +1878,9 @@ _nfs4_opendata_reclaim_to_nfs4_state(str 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; @@ -1944,8 +1945,11 @@ _nfs4_opendata_to_nfs4_state(struct nfs4
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;