netfilter: netns ebtables: ebtable_filter in netns

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>

2 files changed, 38 insertions, 13 deletions

diff --git a/include/net/netns/x_tables.h b/include/net/netns/x_tables.h
index 055e684d29b6..d258e16c894e 100644
--- a/include/net/netns/x_tables.h
+++ b/include/net/netns/x_tables.h
@@ -9,5 +9,6 @@ struct ebt_table;
 struct netns_xt {
         struct list_head tables[NFPROTO_NUMPROTO];
         struct ebt_table *broute_table;
+        struct ebt_table *frame_filter;
 };
 #endif
diff --git a/net/bridge/netfilter/ebtable_filter.c b/net/bridge/netfilter/ebtable_filter.c
index 596564c7aa58..2b2e8040a9c6 100644
--- a/net/bridge/netfilter/ebtable_filter.c
+++ b/net/bridge/netfilter/ebtable_filter.c
@@ -50,41 +50,47 @@ static int check(const struct ebt_table_info *info, unsigned int valid_hooks)
         return 0;
 }
 
-static struct ebt_table __frame_filter =
+static struct ebt_table frame_filter =
 {
         .name           = "filter",
         .table          = &initial_table,
         .valid_hooks    = FILTER_VALID_HOOKS,
-        .lock           = __RW_LOCK_UNLOCKED(__frame_filter.lock),
+        .lock           = __RW_LOCK_UNLOCKED(frame_filter.lock),
         .check          = check,
         .me             = THIS_MODULE,
 };
-static struct ebt_table *frame_filter;
 
 static unsigned int
-ebt_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in,
+ebt_in_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in,
    const struct net_device *out, int (*okfn)(struct sk_buff *))
 {
-        return ebt_do_table(hook, skb, in, out, frame_filter);
+        return ebt_do_table(hook, skb, in, out, dev_net(in)->xt.frame_filter);
+}
+
+static unsigned int
+ebt_out_hook(unsigned int hook, struct sk_buff *skb, const struct net_device *in,
+   const struct net_device *out, int (*okfn)(struct sk_buff *))
+{
+        return ebt_do_table(hook, skb, in, out, dev_net(out)->xt.frame_filter);
 }
 
 static struct nf_hook_ops ebt_ops_filter[] __read_mostly = {
         {
-                .hook           = ebt_hook,
+                .hook           = ebt_in_hook,
                 .owner          = THIS_MODULE,
                 .pf             = PF_BRIDGE,
                 .hooknum        = NF_BR_LOCAL_IN,
                 .priority       = NF_BR_PRI_FILTER_BRIDGED,
         },
         {
-                .hook           = ebt_hook,
+                .hook           = ebt_in_hook,
                 .owner          = THIS_MODULE,
                 .pf             = PF_BRIDGE,
                 .hooknum        = NF_BR_FORWARD,
                 .priority       = NF_BR_PRI_FILTER_BRIDGED,
         },
         {
-                .hook           = ebt_hook,
+                .hook           = ebt_out_hook,
                 .owner          = THIS_MODULE,
                 .pf             = PF_BRIDGE,
                 .hooknum        = NF_BR_LOCAL_OUT,
@@ -92,23 +98,41 @@ static struct nf_hook_ops ebt_ops_filter[] __read_mostly = {
         },
 };
 
+static int __net_init frame_filter_net_init(struct net *net)
+{
+        net->xt.frame_filter = ebt_register_table(net, &frame_filter);
+        if (IS_ERR(net->xt.frame_filter))
+                return PTR_ERR(net->xt.frame_filter);
+        return 0;
+}
+
+static void __net_exit frame_filter_net_exit(struct net *net)
+{
+        ebt_unregister_table(net->xt.frame_filter);
+}
+
+static struct pernet_operations frame_filter_net_ops = {
+        .init = frame_filter_net_init,
+        .exit = frame_filter_net_exit,
+};
+
 static int __init ebtable_filter_init(void)
 {
         int ret;
 
-        frame_filter = ebt_register_table(&init_net, &__frame_filter);
-        if (IS_ERR(frame_filter))
-                return PTR_ERR(frame_filter);
+        ret = register_pernet_subsys(&frame_filter_net_ops);
+        if (ret < 0)
+                return ret;
         ret = nf_register_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter));
         if (ret < 0)
-                ebt_unregister_table(frame_filter);
+                unregister_pernet_subsys(&frame_filter_net_ops);
         return ret;
 }
 
 static void __exit ebtable_filter_fini(void)
 {
         nf_unregister_hooks(ebt_ops_filter, ARRAY_SIZE(ebt_ops_filter));
-        ebt_unregister_table(frame_filter);
+        unregister_pernet_subsys(&frame_filter_net_ops);
 }
 
 module_init(ebtable_filter_init);