From 02276f3c962fd408fa9d441251067845f948bfcf Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ilpo=20J=C3=A4rvinen?= Date: Sat, 28 Feb 2009 04:44:31 +0000 Subject: [PATCH] tcp: fix corner case issue in segmentation during rexmitting MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit If cur_mss grew very recently so that the previously G/TSOed skb now fits well into a single segment it would get send up in parts unless we calculate # of segments again. This corner-case could happen eg. after mtu probe completes or less than previously sack blocks are required for the opposite direction. Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller --- net/ipv4/tcp_output.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 3feab4d6929d..77af7faf38a9 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1921,6 +1921,8 @@ int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb) if (skb->len > cur_mss) { if (tcp_fragment(sk, skb, cur_mss, cur_mss)) return -ENOMEM; /* We'll try again later. */ + } else { + tcp_init_tso_segs(sk, skb, cur_mss); } tcp_retrans_try_collapse(sk, skb, cur_mss); -- 2.30.2