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authorJeff Layton <jlayton@primarydata.com>2014-07-29 21:34:27 -0400
committerJ. Bruce Fields <bfields@redhat.com>2014-07-31 14:20:19 -0400
commit58fb12e6a42f30adf209f8f41385a3bbb2c82420 (patch)
tree5ca75f92bd5aa9629f30c21d6e0e8df8f0984235 /fs/nfsd/nfs4proc.c
parent6b180f0b57af0295e8dc2602a7a4781241766340 (diff)
nfsd: Add a mutex to protect the NFSv4.0 open owner replay cache
We don't want to rely on the client_mutex for protection in the case of NFSv4 open owners. Instead, we add a mutex that will only be taken for NFSv4.0 state mutating operations, and that will be released once the entire compound is done. Also, ensure that nfsd4_cstate_assign_replay/nfsd4_cstate_clear_replay take a reference to the stateowner when they are using it for NFSv4.0 open and lock replay caching. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfs4proc.c')
-rw-r--r--fs/nfsd/nfs4proc.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 8611585f739d..29cf395b694e 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -469,12 +469,9 @@ out:
fh_put(resfh);
kfree(resfh);
}
- nfsd4_cleanup_open_state(open, status);
- if (open->op_openowner && !nfsd4_has_session(cstate))
- cstate->replay_owner = &open->op_openowner->oo_owner;
+ nfsd4_cleanup_open_state(cstate, open, status);
nfsd4_bump_seqid(cstate, status);
- if (!cstate->replay_owner)
- nfs4_unlock_state();
+ nfs4_unlock_state();
return status;
}
@@ -1395,10 +1392,7 @@ encode_op:
args->ops, args->opcnt, resp->opcnt, op->opnum,
be32_to_cpu(status));
- if (cstate->replay_owner) {
- nfs4_unlock_state();
- cstate->replay_owner = NULL;
- }
+ nfsd4_cstate_clear_replay(cstate);
/* XXX Ugh, we need to get rid of this kind of special case: */
if (op->opnum == OP_READ && op->u.read.rd_filp)
fput(op->u.read.rd_filp);