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>

diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 6e26ea2..2b7907a 100644 (file)
--- 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 0646521..a80255f 100644 (file)
--- 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)

diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index e99fbb7..46ce410 100644 (file)
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -336,13 +336,6 @@ static struct ctl_table ipv4_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec
        },
-       {
-               .procname       = "tcp_keepalive_intvl",
-               .data           = &sysctl_tcp_keepalive_intvl,
-               .maxlen         = sizeof(int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec_jiffies,
-       },
        {
                .procname       = "tcp_retries1",
                .data           = &sysctl_tcp_retries1,
@@ -961,6 +954,13 @@ static struct ctl_table ipv4_net_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec
        },
+       {
+               .procname       = "tcp_keepalive_intvl",
+               .data           = &init_net.ipv4.sysctl_tcp_keepalive_intvl,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_jiffies,
+       },
        { }
 };
 

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index ed98de8..65947c1 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2387,6 +2387,7 @@ static int __net_init tcp_sk_init(struct net *net)
 
        net->ipv4.sysctl_tcp_keepalive_time = TCP_KEEPALIVE_TIME;
        net->ipv4.sysctl_tcp_keepalive_probes = TCP_KEEPALIVE_PROBES;
+       net->ipv4.sysctl_tcp_keepalive_intvl = TCP_KEEPALIVE_INTVL;
 
        return 0;
 fail:

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 0ccb120..a4730a2 100644 (file)
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -24,7 +24,6 @@
 
 int sysctl_tcp_syn_retries __read_mostly = TCP_SYN_RETRIES;
 int sysctl_tcp_synack_retries __read_mostly = TCP_SYNACK_RETRIES;
-int sysctl_tcp_keepalive_intvl __read_mostly = TCP_KEEPALIVE_INTVL;
 int sysctl_tcp_retries1 __read_mostly = TCP_RETR1;
 int sysctl_tcp_retries2 __read_mostly = TCP_RETR2;
 int sysctl_tcp_orphan_retries __read_mostly;