ipv4: Namespecify the tcp_keepalive_intvl sysctl knob

This is the final part required to namespaceify the tcp
keep alive mechanism.

Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 4 insertions, 2 deletions

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 6e26ea2d0374..2b7907a35568 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -96,6 +96,7 @@ struct netns_ipv4 {
 
         int sysctl_tcp_keepalive_time;
         int sysctl_tcp_keepalive_probes;
+        int sysctl_tcp_keepalive_intvl;
 
         struct ping_group_range ping_group_range;
 
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 0646521400bf..a80255f4ca33 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -240,7 +240,6 @@ extern int sysctl_tcp_timestamps;
 extern int sysctl_tcp_window_scaling;
 extern int sysctl_tcp_sack;
 extern int sysctl_tcp_fin_timeout;
-extern int sysctl_tcp_keepalive_intvl;
 extern int sysctl_tcp_syn_retries;
 extern int sysctl_tcp_synack_retries;
 extern int sysctl_tcp_retries1;
@@ -1223,7 +1222,9 @@ void tcp_enter_memory_pressure(struct sock *sk);
 
 static inline int keepalive_intvl_when(const struct tcp_sock *tp)
 {
-        return tp->keepalive_intvl ? : sysctl_tcp_keepalive_intvl;
+        struct net *net = sock_net((struct sock *)tp);
+
+        return tp->keepalive_intvl ? : net->ipv4.sysctl_tcp_keepalive_intvl;
 }
 
 static inline int keepalive_time_when(const struct tcp_sock *tp)