[NET] sysctl: make sysctl_somaxconn per-namespace

Just move the variable on the struct net and adjust
its usage.

Others sysctls from sys.net.core table are more
difficult to virtualize (i.e. make them per-namespace),
but I'll look at them as well a bit later.

Signed-off-by: Pavel Emelyanov <xemul@oenvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/socket.c b/net/socket.c
index 9ebca5c695d..7651de00850 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -1365,17 +1365,17 @@ asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
  *      ready for listening.
  */
 
-int sysctl_somaxconn __read_mostly = SOMAXCONN;
-
 asmlinkage long sys_listen(int fd, int backlog)
 {
         struct socket *sock;
         int err, fput_needed;
+        int somaxconn;
 
         sock = sockfd_lookup_light(fd, &err, &fput_needed);
         if (sock) {
-                if ((unsigned)backlog > sysctl_somaxconn)
-                        backlog = sysctl_somaxconn;
+                somaxconn = sock->sk->sk_net->sysctl_somaxconn;
+                if ((unsigned)backlog > somaxconn)
+                        backlog = somaxconn;
 
                 err = security_socket_listen(sock, backlog);
                 if (!err)