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[NETFILTER]: arp_tables: per-netns arp_tables FILTER

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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>
This commit is contained in:
Alexey Dobriyan 2008-01-31 04:05:09 -08:00 committed by David S. Miller
parent 79df341ab6
commit 9ea0cb2601
2 changed files with 29 additions and 10 deletions
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1
include/net/netns/ipv4.h
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@ -31,6 +31,7 @@ struct netns_ipv4 {
struct xt_table *iptable_filter; struct xt_table *iptable_filter;
struct xt_table *iptable_mangle; struct xt_table *iptable_mangle;
struct xt_table *iptable_raw; struct xt_table *iptable_raw;
struct xt_table *arptable_filter;
#endif #endif
}; };
#endif #endif

38
net/ipv4/netfilter/arptable_filter.c
View File

@ -20,7 +20,7 @@ static struct
struct arpt_replace repl; struct arpt_replace repl;
struct arpt_standard entries[3]; struct arpt_standard entries[3];
struct arpt_error term; struct arpt_error term;
} initial_table __initdata = { } initial_table __net_initdata = {
.repl = { .repl = {
.name = "filter", .name = "filter",
.valid_hooks = FILTER_VALID_HOOKS, .valid_hooks = FILTER_VALID_HOOKS,
@ -45,7 +45,7 @@ static struct
.term = ARPT_ERROR_INIT, .term = ARPT_ERROR_INIT,
}; };
static struct arpt_table __packet_filter = { static struct arpt_table packet_filter = {
.name = "filter", .name = "filter",
.valid_hooks = FILTER_VALID_HOOKS, .valid_hooks = FILTER_VALID_HOOKS,
.lock = RW_LOCK_UNLOCKED, .lock = RW_LOCK_UNLOCKED,
@ -53,7 +53,6 @@ static struct arpt_table __packet_filter = {
.me = THIS_MODULE, .me = THIS_MODULE,
.af = NF_ARP, .af = NF_ARP,
}; };
static struct arpt_table *packet_filter;
/* The work comes in here from netfilter.c */ /* The work comes in here from netfilter.c */
static unsigned int arpt_hook(unsigned int hook, static unsigned int arpt_hook(unsigned int hook,
@ -62,7 +61,7 @@ static unsigned int arpt_hook(unsigned int hook,
const struct net_device *out, const struct net_device *out,
int (*okfn)(struct sk_buff *)) int (*okfn)(struct sk_buff *))
{ {
return arpt_do_table(skb, hook, in, out, packet_filter); return arpt_do_table(skb, hook, in, out, init_net.ipv4.arptable_filter);
} }
static struct nf_hook_ops arpt_ops[] __read_mostly = { static struct nf_hook_ops arpt_ops[] __read_mostly = {
@ -86,14 +85,33 @@ static struct nf_hook_ops arpt_ops[] __read_mostly = {
}, },
}; };
static int __net_init arptable_filter_net_init(struct net *net)
{
/* Register table */
net->ipv4.arptable_filter =
arpt_register_table(net, &packet_filter, &initial_table.repl);
if (IS_ERR(net->ipv4.arptable_filter))
return PTR_ERR(net->ipv4.arptable_filter);
return 0;
}
static void __net_exit arptable_filter_net_exit(struct net *net)
{
arpt_unregister_table(net->ipv4.arptable_filter);
}
static struct pernet_operations arptable_filter_net_ops = {
.init = arptable_filter_net_init,
.exit = arptable_filter_net_exit,
};
static int __init arptable_filter_init(void) static int __init arptable_filter_init(void)
{ {
int ret; int ret;
/* Register table */ ret = register_pernet_subsys(&arptable_filter_net_ops);
packet_filter = arpt_register_table(&init_net, &__packet_filter, &initial_table.repl); if (ret < 0)
if (IS_ERR(packet_filter)) return ret;
return PTR_ERR(packet_filter);
ret = nf_register_hooks(arpt_ops, ARRAY_SIZE(arpt_ops)); ret = nf_register_hooks(arpt_ops, ARRAY_SIZE(arpt_ops));
if (ret < 0) if (ret < 0)
@ -101,14 +119,14 @@ static int __init arptable_filter_init(void)
return ret; return ret;
cleanup_table: cleanup_table:
arpt_unregister_table(packet_filter); unregister_pernet_subsys(&arptable_filter_net_ops);
return ret; return ret;
} }
static void __exit arptable_filter_fini(void) static void __exit arptable_filter_fini(void)
{ {
nf_unregister_hooks(arpt_ops, ARRAY_SIZE(arpt_ops)); nf_unregister_hooks(arpt_ops, ARRAY_SIZE(arpt_ops));
arpt_unregister_table(packet_filter); unregister_pernet_subsys(&arptable_filter_net_ops);
} }
module_init(arptable_filter_init); module_init(arptable_filter_init);