Once we remove the client_mutex, we'll need to properly protect
the stateowner reference counts using the cl_lock.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index fb2f3ec0708f..346bdf320a35 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3047,9 +3047,14 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj
static void nfs4_put_stateowner(struct nfs4_stateowner *sop)
{
- if (!atomic_dec_and_test(&sop->so_count))
+ struct nfs4_client *clp = sop->so_client;
+
+ might_lock(&clp->cl_lock);
+
+ if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock))
return;
sop->so_unhash(sop);
+ spin_unlock(&clp->cl_lock);
sop->so_free(sop);
}
@@ -3064,11 +3069,7 @@ static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, u
static void nfs4_unhash_openowner(struct nfs4_stateowner *so)
{
- struct nfs4_client *clp = so->so_client;
-
- spin_lock(&clp->cl_lock);
unhash_openowner_locked(openowner(so));
- spin_unlock(&clp->cl_lock);
}
static void nfs4_free_openowner(struct nfs4_stateowner *so)
@@ -4837,11 +4838,7 @@ find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner,
static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop)
{
- struct nfs4_client *clp = sop->so_client;
-
- spin_lock(&clp->cl_lock);
unhash_lockowner_locked(lockowner(sop));
- spin_unlock(&clp->cl_lock);
}
static void nfs4_free_lockowner(struct nfs4_stateowner *sop)
--
1.9.3
--
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