[NETFILTER]: ip6_tables: per-netns IPv6 FILTER, MANGLE, RAW
Now it's possible to list and manipulate per-netns ip6tables rules.
Filtering decisions are based on init_net's table so far.
P.S.: remove init_net check in inet6_create() to see the effect
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter/ip6table_filter.c b/net/ipv6/netfilter/ip6table_filter.c
index d0bf71d..2d9cd09 100644
--- a/net/ipv6/netfilter/ip6table_filter.c
+++ b/net/ipv6/netfilter/ip6table_filter.c
@@ -26,7 +26,7 @@
struct ip6t_replace repl;
struct ip6t_standard entries[3];
struct ip6t_error term;
-} initial_table __initdata = {
+} initial_table __net_initdata = {
.repl = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
@@ -51,14 +51,13 @@
.term = IP6T_ERROR_INIT, /* ERROR */
};
-static struct xt_table __packet_filter = {
+static struct xt_table packet_filter = {
.name = "filter",
.valid_hooks = FILTER_VALID_HOOKS,
.lock = RW_LOCK_UNLOCKED,
.me = THIS_MODULE,
.af = AF_INET6,
};
-static struct xt_table *packet_filter;
/* The work comes in here from netfilter.c. */
static unsigned int
@@ -68,7 +67,7 @@
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
- return ip6t_do_table(skb, hook, in, out, packet_filter);
+ return ip6t_do_table(skb, hook, in, out, init_net.ipv6.ip6table_filter);
}
static unsigned int
@@ -88,7 +87,7 @@
}
#endif
- return ip6t_do_table(skb, hook, in, out, packet_filter);
+ return ip6t_do_table(skb, hook, in, out, init_net.ipv6.ip6table_filter);
}
static struct nf_hook_ops ip6t_ops[] __read_mostly = {
@@ -119,6 +118,26 @@
static int forward = NF_ACCEPT;
module_param(forward, bool, 0000);
+static int __net_init ip6table_filter_net_init(struct net *net)
+{
+ /* Register table */
+ net->ipv6.ip6table_filter =
+ ip6t_register_table(net, &packet_filter, &initial_table.repl);
+ if (IS_ERR(net->ipv6.ip6table_filter))
+ return PTR_ERR(net->ipv6.ip6table_filter);
+ return 0;
+}
+
+static void __net_exit ip6table_filter_net_exit(struct net *net)
+{
+ ip6t_unregister_table(net->ipv6.ip6table_filter);
+}
+
+static struct pernet_operations ip6table_filter_net_ops = {
+ .init = ip6table_filter_net_init,
+ .exit = ip6table_filter_net_exit,
+};
+
static int __init ip6table_filter_init(void)
{
int ret;
@@ -131,10 +150,9 @@
/* Entry 1 is the FORWARD hook */
initial_table.entries[1].target.verdict = -forward - 1;
- /* Register table */
- packet_filter = ip6t_register_table(&init_net, &__packet_filter, &initial_table.repl);
- if (IS_ERR(packet_filter))
- return PTR_ERR(packet_filter);
+ ret = register_pernet_subsys(&ip6table_filter_net_ops);
+ if (ret < 0)
+ return ret;
/* Register hooks */
ret = nf_register_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
@@ -144,14 +162,14 @@
return ret;
cleanup_table:
- ip6t_unregister_table(packet_filter);
+ unregister_pernet_subsys(&ip6table_filter_net_ops);
return ret;
}
static void __exit ip6table_filter_fini(void)
{
nf_unregister_hooks(ip6t_ops, ARRAY_SIZE(ip6t_ops));
- ip6t_unregister_table(packet_filter);
+ unregister_pernet_subsys(&ip6table_filter_net_ops);
}
module_init(ip6table_filter_init);