提交 b3de7559 编写于 作者: Y Yuchung Cheng 提交者: David S. Miller

tcp: fix TSO FACK loss marking in tcp_mark_head_lost

When TCP uses FACK algorithm to mark lost packets in
tcp_mark_head_lost(), if the number of packets in the (TSO) skb is
greater than the number of packets that should be marked lost, TCP
incorrectly exits the loop and marks no packets lost in the skb. This
underestimates tp->lost_out and affects the recovery/retransmission.
This patch fargments the skb and marks the correct amount of packets
lost.
Signed-off-by: NYuchung Cheng <ycheng@google.com>
Acked-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 3fd6c88e
...@@ -2545,7 +2545,8 @@ static void tcp_mark_head_lost(struct sock *sk, int packets) ...@@ -2545,7 +2545,8 @@ static void tcp_mark_head_lost(struct sock *sk, int packets)
cnt += tcp_skb_pcount(skb); cnt += tcp_skb_pcount(skb);
if (cnt > packets) { if (cnt > packets) {
if (tcp_is_sack(tp) || (oldcnt >= packets)) if ((tcp_is_sack(tp) && !tcp_is_fack(tp)) ||
(oldcnt >= packets))
break; break;
mss = skb_shinfo(skb)->gso_size; mss = skb_shinfo(skb)->gso_size;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册