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l2tp: close sessions in ip socket destroy callback 

l2tp_core hooks UDP's .destroy handler to gain advance warning of a tunnel
socket being closed from userspace.  We need to do the same thing for
IP-encapsulation sockets.

Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Parkin 2013-03-19 06:11:15 +00:00 committed by David S. Miller
parent e34f4c7050
commit 936063175a
2 changed files with 13 additions and 0 deletions
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6
net/l2tp/l2tp_ip.c
View File

@ -228,10 +228,16 @@ static void l2tp_ip_close(struct sock *sk, long timeout)
static void l2tp_ip_destroy_sock(struct sock *sk)
{
struct sk_buff *skb;
struct l2tp_tunnel *tunnel = l2tp_sock_to_tunnel(sk);
while ((skb = __skb_dequeue_tail(&sk->sk_write_queue)) != NULL)
kfree_skb(skb);
if (tunnel) {
l2tp_tunnel_closeall(tunnel);
sock_put(sk);
}
sk_refcnt_debug_dec(sk);
}

7
net/l2tp/l2tp_ip6.c
View File

@ -241,10 +241,17 @@ static void l2tp_ip6_close(struct sock *sk, long timeout)
static void l2tp_ip6_destroy_sock(struct sock *sk)
{
struct l2tp_tunnel *tunnel = l2tp_sock_to_tunnel(sk);
lock_sock(sk);
ip6_flush_pending_frames(sk);
release_sock(sk);
if (tunnel) {
l2tp_tunnel_closeall(tunnel);
sock_put(sk);
}
inet6_destroy_sock(sk);
}