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xfrm: Don't queue retransmitted packets if the original is still on the host

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It does not make sense to queue retransmitted packets if the
original packet is still in some queue of this host. So add
a check to xdst_queue_output() and drop the packet if the
original packet is not yet sent.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Eric Dumazet <edumazet@google.com>
This commit is contained in:
Steffen Klassert 2013-10-16 13:42:46 +02:00
parent 5cf4eb54c2
commit 4d53eff48b
1 changed files with 7 additions and 0 deletions
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7
net/xfrm/xfrm_policy.c
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@ -1832,6 +1832,13 @@ static int xdst_queue_output(struct sk_buff *skb)
struct dst_entry *dst = skb_dst(skb);
struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
struct xfrm_policy_queue *pq = &xdst->pols[0]->polq;
const struct sk_buff *fclone = skb + 1;
if (unlikely(skb->fclone == SKB_FCLONE_ORIG &&
fclone->fclone == SKB_FCLONE_CLONE)) {
kfree_skb(skb);
return 0;
}
if (pq->hold_queue.qlen > XFRM_MAX_QUEUE_LEN) {
kfree_skb(skb);