diff options
| author | Patrick McHardy <kaber@trash.net> | 2007-11-13 03:03:00 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-16 08:27:38 -0800 |
| commit | c6736fd46ba478b59f8293457648432154f0f422 (patch) | |
| tree | bd9c74b6324f20a8ce43f98e564e09ea75043628 | |
| parent | be8962a15857ee7b43bc66f718d7e8987f484fc8 (diff) | |
| download | lwn-c6736fd46ba478b59f8293457648432154f0f422.tar.gz lwn-c6736fd46ba478b59f8293457648432154f0f422.zip | |
Fix netlink timeouts.
[NETLINK]: Fix unicast timeouts
[ Upstream commit: c3d8d1e30cace31fed6186a4b8c6b1401836d89c ]
Commit ed6dcf4a in the history.git tree broke netlink_unicast timeouts
by moving the schedule_timeout() call to a new function that doesn't
propagate the remaining timeout back to the caller. This means on each
retry we start with the full timeout again.
ipc/mqueue.c seems to actually want to wait indefinitely so this
behaviour is retained.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | include/linux/netlink.h | 2 | ||||
| -rw-r--r-- | ipc/mqueue.c | 6 | ||||
| -rw-r--r-- | net/netlink/af_netlink.c | 10 |
3 files changed, 10 insertions, 8 deletions
diff --git a/include/linux/netlink.h b/include/linux/netlink.h index 83d8239f0cce..63af986b3376 100644 --- a/include/linux/netlink.h +++ b/include/linux/netlink.h @@ -175,7 +175,7 @@ extern int netlink_unregister_notifier(struct notifier_block *nb); /* finegrained unicast helpers: */ struct sock *netlink_getsockbyfilp(struct file *filp); int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, - long timeo, struct sock *ssk); + long *timeo, struct sock *ssk); void netlink_detachskb(struct sock *sk, struct sk_buff *skb); int netlink_sendskb(struct sock *sk, struct sk_buff *skb, int protocol); diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 145d5a0d299f..1c0de2c950f2 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -1014,6 +1014,8 @@ asmlinkage long sys_mq_notify(mqd_t mqdes, return -EINVAL; } if (notification.sigev_notify == SIGEV_THREAD) { + long timeo; + /* create the notify skb */ nc = alloc_skb(NOTIFY_COOKIE_LEN, GFP_KERNEL); ret = -ENOMEM; @@ -1042,8 +1044,8 @@ retry: goto out; } - ret = netlink_attachskb(sock, nc, 0, - MAX_SCHEDULE_TIMEOUT, NULL); + timeo = MAX_SCHEDULE_TIMEOUT; + ret = netlink_attachskb(sock, nc, 0, &timeo, NULL); if (ret == 1) goto retry; if (ret) { diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 5681ce3aebca..1a0fcc5bdd9a 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -744,7 +744,7 @@ struct sock *netlink_getsockbyfilp(struct file *filp) * 1: repeat lookup - reference dropped while waiting for socket memory. */ int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, - long timeo, struct sock *ssk) + long *timeo, struct sock *ssk) { struct netlink_sock *nlk; @@ -753,7 +753,7 @@ int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, if (atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf || test_bit(0, &nlk->state)) { DECLARE_WAITQUEUE(wait, current); - if (!timeo) { + if (!*timeo) { if (!ssk || nlk_sk(ssk)->pid == 0) netlink_overrun(sk); sock_put(sk); @@ -767,7 +767,7 @@ int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, if ((atomic_read(&sk->sk_rmem_alloc) > sk->sk_rcvbuf || test_bit(0, &nlk->state)) && !sock_flag(sk, SOCK_DEAD)) - timeo = schedule_timeout(timeo); + *timeo = schedule_timeout(*timeo); __set_current_state(TASK_RUNNING); remove_wait_queue(&nlk->wait, &wait); @@ -775,7 +775,7 @@ int netlink_attachskb(struct sock *sk, struct sk_buff *skb, int nonblock, if (signal_pending(current)) { kfree_skb(skb); - return sock_intr_errno(timeo); + return sock_intr_errno(*timeo); } return 1; } @@ -839,7 +839,7 @@ retry: kfree_skb(skb); return PTR_ERR(sk); } - err = netlink_attachskb(sk, skb, nonblock, timeo, ssk); + err = netlink_attachskb(sk, skb, nonblock, &timeo, ssk); if (err == 1) goto retry; if (err) |