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tcp: consistently check retransmit hint

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tcp_simple_retransmit() used for path MTU discovery may not adjust
the retransmit hint properly by deducting retrans_out before checking
it to adjust the hint. This patch fixes this by a correct routine
tcp_mark_skb_lost() already used by the RACK loss detection.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuchung Cheng
2020-09-25 10:04:28 -07:00
committed by David S. Miller
parent b4f434839e
commit 179ac35f2f
2 changed files with 3 additions and 8 deletions
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2
net/ipv4/tcp_recovery.c
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@@ -246,6 +246,6 @@ void tcp_newreno_mark_lost(struct sock *sk, bool snd_una_advanced)
tcp_fragment(sk, TCP_FRAG_IN_RTX_QUEUE, skb,
mss, mss, GFP_ATOMIC);
tcp_skb_mark_lost_uncond_verify(tp, skb);
tcp_mark_skb_lost(sk, skb);
}
}