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authorNikolay Borisov <kernel@kyup.com>2016-01-07 17:38:43 +0300
committerDavid S. Miller <davem@davemloft.net>2016-01-11 01:32:09 +0300
commit13b287e8d1cad951634389f85b8c9b816bd3bb1e (patch)
treee40de4dc4f8f7e26325b197dc5cc873188061e00 /include/net
parentd3517f19f2c41f1b4e9b6a763c0cea3f7d72b589 (diff)
downloadlinux-13b287e8d1cad951634389f85b8c9b816bd3bb1e.tar.xz
ipv4: Namespaceify tcp_keepalive_time sysctl knob
Different net namespaces might have different requirements as to the keepalive time of tcp sockets. This might be required in cases where different firewall rules are in place which require tcp timeout sockets to be increased/decreased independently of the host. Signed-off-by: Nikolay Borisov <kernel@kyup.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/netns/ipv4.h2
-rw-r--r--include/net/tcp.h5
2 files changed, 5 insertions, 2 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index d75be32650ba..9e9bbebaebd1 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -94,6 +94,8 @@ struct netns_ipv4 {
int sysctl_tcp_probe_threshold;
u32 sysctl_tcp_probe_interval;
+ int sysctl_tcp_keepalive_time;
+
struct ping_group_range ping_group_range;
atomic_t dev_addr_genid;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index f33fecf4e282..cb4d4cf25744 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_time;
extern int sysctl_tcp_keepalive_probes;
extern int sysctl_tcp_keepalive_intvl;
extern int sysctl_tcp_syn_retries;
@@ -1230,7 +1229,9 @@ static inline int keepalive_intvl_when(const struct tcp_sock *tp)
static inline int keepalive_time_when(const struct tcp_sock *tp)
{
- return tp->keepalive_time ? : sysctl_tcp_keepalive_time;
+ struct net *net = sock_net((struct sock *)tp);
+
+ return tp->keepalive_time ? : net->ipv4.sysctl_tcp_keepalive_time;
}
static inline int keepalive_probes(const struct tcp_sock *tp)