netfilter: nf_tables: complete net namespace support
Register family per netnamespace to ensure that sets are
only visible in its approapriate namespace.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/net/ipv4/netfilter/nf_tables_ipv4.c b/net/ipv4/netfilter/nf_tables_ipv4.c
index c61cffb..8f7536b 100644
--- a/net/ipv4/netfilter/nf_tables_ipv4.c
+++ b/net/ipv4/netfilter/nf_tables_ipv4.c
@@ -14,6 +14,7 @@
#include <linux/ip.h>
#include <linux/netfilter_ipv4.h>
#include <net/netfilter/nf_tables.h>
+#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/net_namespace.h>
#include <net/netfilter/nf_tables_ipv4.h>
@@ -47,6 +48,33 @@
},
};
+static int nf_tables_ipv4_init_net(struct net *net)
+{
+ net->nft.ipv4 = kmalloc(sizeof(struct nft_af_info), GFP_KERNEL);
+ if (net->nft.ipv4 == NULL)
+ return -ENOMEM;
+
+ memcpy(net->nft.ipv4, &nft_af_ipv4, sizeof(nft_af_ipv4));
+
+ if (nft_register_afinfo(net, net->nft.ipv4) < 0)
+ goto err;
+
+ return 0;
+err:
+ kfree(net->nft.ipv4);
+ return -ENOMEM;
+}
+
+static void nf_tables_ipv4_exit_net(struct net *net)
+{
+ nft_unregister_afinfo(net->nft.ipv4);
+ kfree(net->nft.ipv4);
+}
+
+static struct pernet_operations nf_tables_ipv4_net_ops = {
+ .init = nf_tables_ipv4_init_net,
+ .exit = nf_tables_ipv4_exit_net,
+};
static unsigned int
nft_do_chain_ipv4(const struct nf_hook_ops *ops,
@@ -83,12 +111,12 @@
static int __init nf_tables_ipv4_init(void)
{
nft_register_chain_type(&filter_ipv4);
- return nft_register_afinfo(&nft_af_ipv4);
+ return register_pernet_subsys(&nf_tables_ipv4_net_ops);
}
static void __exit nf_tables_ipv4_exit(void)
{
- nft_unregister_afinfo(&nft_af_ipv4);
+ unregister_pernet_subsys(&nf_tables_ipv4_net_ops);
nft_unregister_chain_type(&filter_ipv4);
}