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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-06-25 10:15:15 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-07-10 23:40:35 -0400
commitfc432dd90760a629c57026e57f65ff80a1a31d2f (patch)
tree1df060f199effb8cfd52772e618c0bac7b8d0e9f /net/sunrpc/auth.c
parent696e38df9d1b256e97b077ecde7afb8dd60364fd (diff)
SUNRPC: Enforce atomic updates of rpc_cred->cr_flags
Convert to the use of atomic bitops... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/auth.c')
-rw-r--r--net/sunrpc/auth.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 2156327da45..4d7c78b05d1 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -190,8 +190,8 @@ rpcauth_prune_expired(struct rpc_auth *auth, struct rpc_cred *cred, struct hlist
if (atomic_read(&cred->cr_count) != 1)
return;
if (time_after(jiffies, cred->cr_expire + auth->au_credcache->expire))
- cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
- if (!(cred->cr_flags & RPCAUTH_CRED_UPTODATE)) {
+ clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
+ if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) == 0) {
__hlist_del(&cred->cr_hash);
hlist_add_head(&cred->cr_hash, free);
}
@@ -267,7 +267,7 @@ retry:
if (!IS_ERR(new))
goto retry;
cred = new;
- } else if ((cred->cr_flags & RPCAUTH_CRED_NEW)
+ } else if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags)
&& cred->cr_ops->cr_init != NULL
&& !(flags & RPCAUTH_LOOKUP_NEW)) {
int res = cred->cr_ops->cr_init(auth, cred);
@@ -440,17 +440,19 @@ rpcauth_refreshcred(struct rpc_task *task)
void
rpcauth_invalcred(struct rpc_task *task)
{
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+
dprintk("RPC: %5u invalidating %s cred %p\n",
- task->tk_pid, task->tk_auth->au_ops->au_name, task->tk_msg.rpc_cred);
- spin_lock(&rpc_credcache_lock);
- if (task->tk_msg.rpc_cred)
- task->tk_msg.rpc_cred->cr_flags &= ~RPCAUTH_CRED_UPTODATE;
- spin_unlock(&rpc_credcache_lock);
+ task->tk_pid, task->tk_auth->au_ops->au_name, cred);
+ if (cred)
+ clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
}
int
rpcauth_uptodatecred(struct rpc_task *task)
{
- return !(task->tk_msg.rpc_cred) ||
- (task->tk_msg.rpc_cred->cr_flags & RPCAUTH_CRED_UPTODATE);
+ struct rpc_cred *cred = task->tk_msg.rpc_cred;
+
+ return cred == NULL ||
+ test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
}