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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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Stefan Baranoff authored and David S. Miller committed 2018-07-12 14:33:45 -07:00
1 parent 21684dc46c
commit 70b7ff1302
1 file changed
+5 -3
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net/ipv4/tcp.c
+5 -3
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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;