[UNIX]: Move the sysctl_unix_max_dgram_qlen

This will make all the sub-namespaces always use the
default value (10) and leave the tuning via sysctl
to the init namespace only.

Per-namespace tuning is coming.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 7 insertions, 4 deletions

diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 235214c4c231..b0cf07519b81 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -38,6 +38,9 @@ struct net {
         /* List of all packet sockets. */
         rwlock_t                packet_sklist_lock;
         struct hlist_head       packet_sklist;
+
+        /* unix sockets */
+        int                     sysctl_unix_max_dgram_qlen;
 };
 
 #ifdef CONFIG_NET
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index a0aa6d3c2c08..73620d61762b 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -117,8 +117,6 @@
 #include <net/checksum.h>
 #include <linux/security.h>
 
-int sysctl_unix_max_dgram_qlen __read_mostly = 10;
-
 static struct hlist_head unix_socket_table[UNIX_HASH_SIZE + 1];
 static DEFINE_SPINLOCK(unix_table_lock);
 static atomic_t unix_nr_socks = ATOMIC_INIT(0);
@@ -594,7 +592,7 @@ static struct sock * unix_create1(struct net *net, struct socket *sock)
                                 &af_unix_sk_receive_queue_lock_key);
 
         sk->sk_write_space      = unix_write_space;
-        sk->sk_max_ack_backlog  = sysctl_unix_max_dgram_qlen;
+        sk->sk_max_ack_backlog  = net->sysctl_unix_max_dgram_qlen;
         sk->sk_destruct         = unix_sock_destructor;
         u         = unix_sk(sk);
         u->dentry = NULL;
@@ -2140,6 +2138,8 @@ static int unix_net_init(struct net *net)
 {
         int error = -ENOMEM;
 
+        net->sysctl_unix_max_dgram_qlen = 10;
+
 #ifdef CONFIG_PROC_FS
         if (!proc_net_fops_create(net, "unix", 0, &unix_seq_fops))
                 goto out;
diff --git a/net/unix/sysctl_net_unix.c b/net/unix/sysctl_net_unix.c
index b2e0407e1b7b..c46cec04d23f 100644
--- a/net/unix/sysctl_net_unix.c
+++ b/net/unix/sysctl_net_unix.c
@@ -18,7 +18,7 @@ static ctl_table unix_table[] = {
         {
                 .ctl_name       = NET_UNIX_MAX_DGRAM_QLEN,
                 .procname       = "max_dgram_qlen",
-                .data           = &sysctl_unix_max_dgram_qlen,
+                .data           = &init_net.sysctl_unix_max_dgram_qlen,
                 .maxlen         = sizeof(int),
                 .mode           = 0644,
                 .proc_handler   = &proc_dointvec