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[39/70] NFSd: nfsd4_locku() must reference the lock stateid

Message ID 1397846704-14567-40-git-send-email-trond.myklebust@primarydata.com (mailing list archive)
State New, archived
Headers show

Commit Message

Trond Myklebust April 18, 2014, 6:44 p.m. UTC 
Ensure that nfsd4_locku() keeps a reference to the lock stateid
until it is done working with it.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfsd/nfs4state.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index d69d96a7d299..822eed0de95d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4815,10 +4815,12 @@  nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 					&stp, nn);
 	if (status)
 		goto out;
+	/* FIXME: move into nfs4_preprocess_seqid_op */
+	atomic_inc(&stp->st_stid.sc_count);
 	filp = find_any_file(stp->st_stid.sc_file);
 	if (!filp) {
 		status = nfserr_lock_range;
-		goto out;
+		goto put_stateid;
 	}
 	file_lock = locks_alloc_lock();
 	if (!file_lock) {
@@ -4848,6 +4850,8 @@  nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
 fput:
 	fput(filp);
+put_stateid:
+	put_generic_stateid(stp);
 out:
 	nfsd4_bump_seqid(cstate, status);
 	nfs4_unlock_state();