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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2007-11-17 01:17:05 +0100
committerDavid S. Miller <davem@davemloft.net>2008-01-28 23:54:15 +0100
commit20de20beba6e9bd2e1c83696bfefa3b16cda9a74 (patch)
tree71de7ffc816b39eb5a1c0e5c3de2eb1167d681bf /net/ipv4/tcp_input.c
parent[CAN]: Add documentation (diff)
downloadlinux-20de20beba6e9bd2e1c83696bfefa3b16cda9a74.tar.xz
linux-20de20beba6e9bd2e1c83696bfefa3b16cda9a74.zip
[TCP]: Correct DSACK check placing
Previously one of the in-block skip branches was missing it. Also, drop it from tail-fully-processed case because the next iteration will do exactly the same thing, i.e., process the SACK block that contains the DSACK information. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
-rw-r--r--net/ipv4/tcp_input.c15
1 files changed, 5 insertions, 10 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 3ad6a19ad30f..79996b16b942 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1554,20 +1554,15 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
}
/* Rest of the block already fully processed? */
- if (!after(end_seq, cache->end_seq)) {
- skb = tcp_maybe_skipping_dsack(skb, sk, next_dup, cache->end_seq,
- &fack_count, &reord, &flag);
+ if (!after(end_seq, cache->end_seq))
goto advance_sp;
- }
+
+ skb = tcp_maybe_skipping_dsack(skb, sk, next_dup, cache->end_seq,
+ &fack_count, &reord, &flag);
/* ...tail remains todo... */
if (TCP_SKB_CB(tp->highest_sack)->end_seq == cache->end_seq) {
- /* ...but better entrypoint exists! Check that DSACKs are
- * properly accounted while skipping here
- */
- tcp_maybe_skipping_dsack(skb, sk, next_dup, cache->end_seq,
- &fack_count, &reord, &flag);
-
+ /* ...but better entrypoint exists! */
skb = tcp_write_queue_next(sk, tp->highest_sack);
fack_count = tp->fackets_out;
cache++;