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l2tp: use skb_queue_purge in l2tp_ip_destroy_sock

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Recent commit ed8ebee6de ("l2tp: have l2tp_ip_destroy_sock use
ip_flush_pending_frames") was incorrect in that l2tp_ip does not use
socket cork and ip_flush_pending_frames is for sockets that do. Use
__skb_queue_purge instead and remove the unnecessary lock.

Also unexport ip_flush_pending_frames since it was originally exported
in commit 4ff8863419 ("ipv4: export ip_flush_pending_frames") for
l2tp and is not used by other modules.

Suggested-by: xiyou.wangcong@gmail.com
Signed-off-by: James Chapman <jchapman@katalix.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20240819143333.3204957-1-jchapman@katalix.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
James Chapman 2024-08-19 15:33:33 +01:00 committed by Jakub Kicinski
parent 8594d9b85c
commit bc3dd9ed04
2 changed files with 1 additions and 4 deletions
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1
net/ipv4/ip_output.c
View File

@ -1534,7 +1534,6 @@ void ip_flush_pending_frames(struct sock *sk)
{
__ip_flush_pending_frames(sk, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
}
EXPORT_SYMBOL_GPL(ip_flush_pending_frames);
struct sk_buff *ip_make_skb(struct sock *sk,
struct flowi4 *fl4,

4
net/l2tp/l2tp_ip.c
View File

@ -258,9 +258,7 @@ static void l2tp_ip_destroy_sock(struct sock *sk)
{
struct l2tp_tunnel *tunnel;
lock_sock(sk);
ip_flush_pending_frames(sk);
release_sock(sk);
__skb_queue_purge(&sk->sk_write_queue);
tunnel = l2tp_sk_to_tunnel(sk);
if (tunnel) {