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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-07-15 00:19:29 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-07-15 00:19:29 -0700 |
| commit | 0a9f2a467d8dacaf7e97469dba99ed2d07287d80 (patch) | |
| tree | 392b7ddccc4172a903147e6bf2217da6a8831c70 /net | |
| parent | 063ed369c97f8de4cce23bf93bebd7ffacb542ff (diff) | |
| download | lwn-0a9f2a467d8dacaf7e97469dba99ed2d07287d80.tar.gz lwn-0a9f2a467d8dacaf7e97469dba99ed2d07287d80.zip | |
[TCP]: Verify the presence of RETRANS bit when leaving FRTO
For yet unknown reason, something cleared SACKED_RETRANS bit
underneath FRTO.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_input.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 69f9f1ef3ef6..4e5884ac8f29 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1398,7 +1398,9 @@ static void tcp_enter_frto_loss(struct sock *sk, int allowed_segments, int flag) * waiting for the first ACK and did not get it)... */ if ((tp->frto_counter == 1) && !(flag&FLAG_DATA_ACKED)) { - tp->retrans_out += tcp_skb_pcount(skb); + /* For some reason this R-bit might get cleared? */ + if (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS) + tp->retrans_out += tcp_skb_pcount(skb); /* ...enter this if branch just for the first segment */ flag |= FLAG_DATA_ACKED; } else { |