per-netns ipv4 sysctl_tcp_mem

This patch allows each namespace to independently set up
its levels for tcp memory pressure thresholds. This patch
alone does not buy much: we need to make this values
per group of process somehow. This is achieved in the
patches that follows in this patchset.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
CC: David S. Miller <davem@davemloft.net>
CC: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 7694c82e629d..273f48d1df2e 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -1116,6 +1116,8 @@ static int __init inet6_init(void)
         if (err)
                 goto static_sysctl_fail;
 #endif
+        tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
+
         /*
          *      ipngwg API draft makes clear that the correct semantics
          *      for TCP and UDP is to consider one TCP and UDP instance