diff options
| author | Neal Cardwell <ncardwell@google.com> | 2013-10-16 20:36:51 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-10-19 00:22:00 +0400 |
| commit | 675297c904b419542a93de64afaf2a6bd72e35e3 (patch) | |
| tree | 2c73b7552438a7f643be48ccbf0d76f587465a92 /net | |
| parent | 3ba405db1c1b05d157474c71e559393f7ea436ad (diff) | |
| download | linux-675297c904b419542a93de64afaf2a6bd72e35e3.tar.xz | |
tcp: remove redundant code in __tcp_retransmit_skb()
Remove the specialized code in __tcp_retransmit_skb() that tries to trim
any ACKed payload preceding a FIN before we retransmit (this was added
in 1999 in v2.2.3pre3). This trimming code was made unreachable by the
more general code added above it that uses tcp_trim_head() to trim any
ACKed payload, with or without a FIN (this was added in "[NET]: Add
segmentation offload support to TCP." in 2002 circa v2.5.33).
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_output.c | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index e5ce0e1d13b7..ce7c4d9d9195 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -2351,21 +2351,6 @@ int __tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb) tcp_retrans_try_collapse(sk, skb, cur_mss); - /* Some Solaris stacks overoptimize and ignore the FIN on a - * retransmit when old data is attached. So strip it off - * since it is cheap to do so and saves bytes on the network. - */ - if (skb->len > 0 && - (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN) && - tp->snd_una == (TCP_SKB_CB(skb)->end_seq - 1)) { - if (!pskb_trim(skb, 0)) { - /* Reuse, even though it does some unnecessary work */ - tcp_init_nondata_skb(skb, TCP_SKB_CB(skb)->end_seq - 1, - TCP_SKB_CB(skb)->tcp_flags); - skb->ip_summed = CHECKSUM_NONE; - } - } - /* Make a copy, if the first transmission SKB clone we made * is still in somebody's hands, else make a clone. */ |