tcp: Namespace-ify sysctl_tcp_rmem and sysctl_tcp_wmem

Note that when a new netns is created, it inherits its
sysctl_tcp_rmem and sysctl_tcp_wmem from initial netns.

This change is needed so that we can refine TCP rcvbuf autotuning,
to take RTT into consideration.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Wei Wang <weiwan@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index a9d917e4dad5..9b98d35aa0d8 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -220,7 +220,7 @@ void tcp_select_initial_window(const struct sock *sk, int __space, __u32 mss,
         (*rcv_wscale) = 0;
         if (wscale_ok) {
                 /* Set window scaling on max possible window */
-                space = max_t(u32, space, sysctl_tcp_rmem[2]);
+                space = max_t(u32, space, sock_net(sk)->ipv4.sysctl_tcp_rmem[2]);
                 space = max_t(u32, space, sysctl_rmem_max);
                 space = min_t(u32, space, *window_clamp);
                 while (space > U16_MAX && (*rcv_wscale) < TCP_MAX_WSCALE) {