net: make sock diag per-namespace
Before this patch sock_diag works for init_net only and dumps
information about sockets from all namespaces.
This patch expands sock_diag for all name-spaces.
It creates a netlink kernel socket for each netns and filters
data during dumping.
v2: filter accoding with netns in all places
remove an unused variable.
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Pavel Emelyanov <xemul@parallels.com>
CC: Eric Dumazet <eric.dumazet@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index 07a29eb..9d8755e 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -166,23 +166,36 @@
mutex_unlock(&sock_diag_mutex);
}
-struct sock *sock_diag_nlsk;
-EXPORT_SYMBOL_GPL(sock_diag_nlsk);
-
-static int __init sock_diag_init(void)
+static int __net_init diag_net_init(struct net *net)
{
struct netlink_kernel_cfg cfg = {
.input = sock_diag_rcv,
};
- sock_diag_nlsk = netlink_kernel_create(&init_net, NETLINK_SOCK_DIAG,
+ net->diag_nlsk = netlink_kernel_create(net, NETLINK_SOCK_DIAG,
THIS_MODULE, &cfg);
- return sock_diag_nlsk == NULL ? -ENOMEM : 0;
+ return net->diag_nlsk == NULL ? -ENOMEM : 0;
+}
+
+static void __net_exit diag_net_exit(struct net *net)
+{
+ netlink_kernel_release(net->diag_nlsk);
+ net->diag_nlsk = NULL;
+}
+
+static struct pernet_operations diag_net_ops = {
+ .init = diag_net_init,
+ .exit = diag_net_exit,
+};
+
+static int __init sock_diag_init(void)
+{
+ return register_pernet_subsys(&diag_net_ops);
}
static void __exit sock_diag_exit(void)
{
- netlink_kernel_release(sock_diag_nlsk);
+ unregister_pernet_subsys(&diag_net_ops);
}
module_init(sock_diag_init);