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net: fix sleeping for sk_wait_event()

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Similar to commit 14135f30e3 ("inet: fix sleeping inside inet_wait_for_connect()"),
sk_wait_event() needs to fix too, because release_sock() is blocking,
it changes the process state back to running after sleep, which breaks
the previous prepare_to_wait().

Switch to the new wait API.

Cc: Eric Dumazet <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
WANG Cong 2016-11-11 10:20:50 -08:00 • committed by David S. Miller
commit d9dc8b0f8b
10 changed files with 77 additions and 77 deletions
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24
net/llc/af_llc.c
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@ -532,12 +532,12 @@ out:
static int llc_ui_wait_for_disc(struct sock *sk, long timeout)
{
DEFINE_WAIT(wait);
DEFINE_WAIT_FUNC(wait, woken_wake_function);
int rc = 0;
add_wait_queue(sk_sleep(sk), &wait);
while (1) {
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
if (sk_wait_event(sk, &timeout, sk->sk_state == TCP_CLOSE))
if (sk_wait_event(sk, &timeout, sk->sk_state == TCP_CLOSE, &wait))
break;
rc = -ERESTARTSYS;
if (signal_pending(current))
@ -547,39 +547,39 @@ static int llc_ui_wait_for_disc(struct sock *sk, long timeout)
break;
rc = 0;
}
finish_wait(sk_sleep(sk), &wait);
remove_wait_queue(sk_sleep(sk), &wait);
return rc;
}
static bool llc_ui_wait_for_conn(struct sock *sk, long timeout)
{
DEFINE_WAIT(wait);
DEFINE_WAIT_FUNC(wait, woken_wake_function);
add_wait_queue(sk_sleep(sk), &wait);
while (1) {
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
if (sk_wait_event(sk, &timeout, sk->sk_state != TCP_SYN_SENT))
if (sk_wait_event(sk, &timeout, sk->sk_state != TCP_SYN_SENT, &wait))
break;
if (signal_pending(current) || !timeout)
break;
}
finish_wait(sk_sleep(sk), &wait);
remove_wait_queue(sk_sleep(sk), &wait);
return timeout;
}
static int llc_ui_wait_for_busy_core(struct sock *sk, long timeout)
{
DEFINE_WAIT(wait);
DEFINE_WAIT_FUNC(wait, woken_wake_function);
struct llc_sock *llc = llc_sk(sk);
int rc;
add_wait_queue(sk_sleep(sk), &wait);
while (1) {
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
rc = 0;
if (sk_wait_event(sk, &timeout,
(sk->sk_shutdown & RCV_SHUTDOWN) ||
(!llc_data_accept_state(llc->state) &&
!llc->remote_busy_flag &&
!llc->p_flag)))
!llc->p_flag), &wait))
break;
rc = -ERESTARTSYS;
if (signal_pending(current))
@ -588,7 +588,7 @@ static int llc_ui_wait_for_busy_core(struct sock *sk, long timeout)
if (!timeout)
break;
}
finish_wait(sk_sleep(sk), &wait);
remove_wait_queue(sk_sleep(sk), &wait);
return rc;
}