From 70b7ff130224d2d22a158c7f4aa5e7fb1c95949d Mon Sep 17 00:00:00 2001 From: Stefan Baranoff Date: Tue, 10 Jul 2018 17:31:10 -0400 Subject: [PATCH] tcp: allow user to create repair socket without window probes 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 Signed-off-by: David S. Miller --- net/ipv4/tcp.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 0d43705dd001..8e5e2ca9ab1b 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -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;