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tcp: allow user to create repair socket without window probes

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Under rare conditions where repair code may be used it is possible that
window probes are either unnecessary or undesired. If the user knows that
window probes are not wanted or needed this change allows them to skip
sending them when a socket comes out of repair.

Signed-off-by: Stefan Baranoff <sbaranoff@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Baranoff 2018-07-10 17:31:10 -04:00 • committed by David S. Miller
parent 21684dc46c
commit 70b7ff1302
1 changed files with 5 additions and 3 deletions
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8
net/ipv4/tcp.c
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@ -2823,14 +2823,16 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
case TCP_REPAIR:
if (!tcp_can_repair_sock(sk))
err = -EPERM;
else if (val == 1) {
tp->repair = 1;
/* 1 for normal repair, 2 for no window probes */
else if (val == 1 || val == 2) {
tp->repair = val;
sk->sk_reuse = SK_FORCE_REUSE;
tp->repair_queue = TCP_NO_QUEUE;
} else if (val == 0) {
tp->repair = 0;
sk->sk_reuse = SK_NO_REUSE;
tcp_send_window_probe(sk);
if (tp->repair == 1)
tcp_send_window_probe(sk);
} else
err = -EINVAL;