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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-09-25 22:44:14 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:52:38 -0700 |
| commit | a6963a6b3d2d3921b60f45e0cf18be26495d5ad1 (patch) | |
| tree | 4eb7bb05c4173d87bc94926ac852fb95d8837c27 | |
| parent | b0d045ca45a44d9f8bd66d0a10558b10c60f895a (diff) | |
| download | linux-3.10-a6963a6b3d2d3921b60f45e0cf18be26495d5ad1.tar.gz linux-3.10-a6963a6b3d2d3921b60f45e0cf18be26495d5ad1.tar.bz2 linux-3.10-a6963a6b3d2d3921b60f45e0cf18be26495d5ad1.zip | |
[TCP]: Re-place highest_sack check to a more robust position
I previously added checking to position that is rather poor as
state has already been adjusted quite a bit. Re-placing it above
all state changes should be more robust though the return should
never ever get executed regardless of its place :-).
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_output.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index cbb83acd830..94c80113df7 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1718,6 +1718,10 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m BUG_ON(tcp_skb_pcount(skb) != 1 || tcp_skb_pcount(next_skb) != 1); + if (WARN_ON(tp->sacked_out && + (TCP_SKB_CB(next_skb)->seq == tp->highest_sack))) + return; + /* Ok. We will be able to collapse the packet. */ tcp_unlink_write_queue(next_skb, sk); @@ -1734,10 +1738,6 @@ static void tcp_retrans_try_collapse(struct sock *sk, struct sk_buff *skb, int m /* Update sequence range on original skb. */ TCP_SKB_CB(skb)->end_seq = TCP_SKB_CB(next_skb)->end_seq; - if (WARN_ON(tp->sacked_out && - (TCP_SKB_CB(next_skb)->seq == tp->highest_sack))) - return; - /* Merge over control information. */ flags |= TCP_SKB_CB(next_skb)->flags; /* This moves PSH/FIN etc. over */ TCP_SKB_CB(skb)->flags = flags; |