From: "J. Bruce Fields" <bfields@xxxxxxxxxx>
The locking here is very fiddly, and there's no reason for us to be
setting cstate->session, since this is the only op in the compound.
Let's just take the state lock and drop the reference counting.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 28 ++++++++++++++--------------
1 file changed, 14 insertions(+), 14 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 05ebcf5..0ff616f 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1883,30 +1883,30 @@ __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp,
{
__be32 status;
struct nfsd4_conn *conn;
+ struct nfsd4_session *session;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
if (!nfsd4_last_compound_op(rqstp))
return nfserr_not_only_op;
+ nfs4_lock_state();
spin_lock(&nn->client_lock);
- cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp));
- /* Sorta weird: we only need the refcnt'ing because new_conn acquires
- * client_lock iself: */
- if (cstate->session) {
- nfsd4_get_session(cstate->session);
- atomic_inc(&cstate->session->se_client->cl_refcount);
- }
+ session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp));
spin_unlock(&nn->client_lock);
- if (!cstate->session)
- return nfserr_badsession;
-
+ status = nfserr_badsession;
+ if (!session)
+ goto out;
status = nfsd4_map_bcts_dir(&bcts->dir);
if (status)
- return status;
+ goto out;
conn = alloc_conn(rqstp, bcts->dir);
+ status = nfserr_jukebox;
if (!conn)
- return nfserr_jukebox;
- nfsd4_init_conn(rqstp, conn, cstate->session);
- return nfs_ok;
+ goto out;
+ nfsd4_init_conn(rqstp, conn, session);
+ status = nfs_ok;
+out:
+ nfs4_unlock_state();
+ return status;
}
static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid)
--
1.7.9.5
--
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