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tcp: Report mss_clamp with TCP_MAXSEG option in repair mode

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The mss_clamp is the only connection-time negotiated option which
cannot be obtained from the user space. Make the TCP_MAXSEG sockopt
report one in the repair mode.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2012-04-19 03:41:32 +00:00 committed by David S. Miller
parent c0e88ff0f2
commit 5e6a3ce657
1 changed files with 2 additions and 0 deletions
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2
net/ipv4/tcp.c
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@ -2659,6 +2659,8 @@ static int do_tcp_getsockopt(struct sock *sk, int level,
val = tp->mss_cache; val = tp->mss_cache;
if (!val && ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) if (!val && ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)))
val = tp->rx_opt.user_mss; val = tp->rx_opt.user_mss;
if (tp->repair)
val = tp->rx_opt.mss_clamp;
break; break;
case TCP_NODELAY: case TCP_NODELAY:
val = !!(tp->nonagle&TCP_NAGLE_OFF); val = !!(tp->nonagle&TCP_NAGLE_OFF);