Re: The recent kref_put warning (was: [PATCH] sunrpc: remove unnecessary svc_xprt_put)

J. Bruce Fields
2010-03-01T03:47:40Z

For people that can test, the combined patch is just as follows.

--b.

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index d7ec5ca..8f0f1fb 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -706,8 +706,10 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
spin_unlock_bh(&pool->sp_lock);

len = 0;
- if (test_bit(XPT_LISTENER, &xprt->xpt_flags) &&
- !test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
+ if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
+ dprintk("svc_recv: found XPT_CLOSE\n");
+ svc_delete_xprt(xprt);
+ } else if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
struct svc_xprt *newxpt;
newxpt = xprt->xpt_ops->xpo_accept(xprt);
if (newxpt) {
@@ -733,7 +735,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
svc_xprt_received(newxpt);
}
svc_xprt_received(xprt);
- } else if (!test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
+ } else {
dprintk("svc: server %p, pool %u, transport %p, inuse=%d\n",
rqstp, pool->sp_id, xprt,
atomic_read(&xprt->xpt_ref.refcount));
@@ -746,11 +748,6 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
dprintk("svc: got len=%d\n", len);
}

- if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
- dprintk("svc_recv: found XPT_CLOSE\n");
- svc_delete_xprt(xprt);
- }
-
/* No data, incomplete (TCP) read, or accept() */
if (len == 0 || len == -EAGAIN) {
rqstp->rq_res.len = 0;
@@ -896,11 +893,8 @@ void svc_delete_xprt(struct svc_xprt *xprt)
if (test_bit(XPT_TEMP, &xprt->xpt_flags))
serv->sv_tmpcnt--;

- for (dr = svc_deferred_dequeue(xprt); dr;
- dr = svc_deferred_dequeue(xprt)) {
- svc_xprt_put(xprt);
+ while ((dr = svc_deferred_dequeue(xprt)) != NULL)
kfree(dr);
- }

svc_xprt_put(xprt);
spin_unlock_bh(&serv->sv_lock);
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 9e09391..a29f259 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -968,6 +968,7 @@ static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp)
return len;
err_delete:
set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+ svc_xprt_received(&svsk->sk_xprt);
err_again:
return -EAGAIN;
}