diff options
Diffstat (limited to 'net/core/datagram.c')
| -rw-r--r-- | net/core/datagram.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/core/datagram.c b/net/core/datagram.c index 029b93e246b..fbd6c76436d 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -217,20 +217,27 @@ void skb_free_datagram(struct sock *sk, struct sk_buff *skb) * This function currently only disables BH when acquiring the * sk_receive_queue lock. Therefore it must not be used in a * context where that lock is acquired in an IRQ context. + * + * It returns 0 if the packet was removed by us. */ -void skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags) +int skb_kill_datagram(struct sock *sk, struct sk_buff *skb, unsigned int flags) { + int err = 0; + if (flags & MSG_PEEK) { + err = -ENOENT; spin_lock_bh(&sk->sk_receive_queue.lock); if (skb == skb_peek(&sk->sk_receive_queue)) { __skb_unlink(skb, &sk->sk_receive_queue); atomic_dec(&skb->users); + err = 0; } spin_unlock_bh(&sk->sk_receive_queue.lock); } kfree_skb(skb); + return err; } EXPORT_SYMBOL(skb_kill_datagram); |