From 9335f047fe61587ec82ff12fbb1220bcfdd32006 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Thu, 31 Jan 2008 04:03:23 -0800 Subject: [NETFILTER]: ip_tables: per-netns FILTER, MANGLE, RAW Now, iptables show and configure different set of rules in different netnss'. Filtering decisions are still made by consulting only init_net's set. Changes are identical except naming so no splitting. P.S.: one need to remove init_net checks in nf_sockopt.c and inet_create() to see the effect. Signed-off-by: Alexey Dobriyan Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter/iptable_filter.c | 41 ++++++++++++++++++++++++++----------- 1 file changed, 29 insertions(+), 12 deletions(-) (limited to 'net/ipv4/netfilter/iptable_filter.c') diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c index 3b43ca0..69f3d7e 100644 --- a/net/ipv4/netfilter/iptable_filter.c +++ b/net/ipv4/netfilter/iptable_filter.c @@ -28,7 +28,7 @@ static struct struct ipt_replace repl; struct ipt_standard entries[3]; struct ipt_error term; -} initial_table __initdata = { +} initial_table __net_initdata = { .repl = { .name = "filter", .valid_hooks = FILTER_VALID_HOOKS, @@ -53,14 +53,13 @@ static struct .term = IPT_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_INET, }; -static struct xt_table *packet_filter; /* The work comes in here from netfilter.c. */ static unsigned int @@ -70,7 +69,7 @@ ipt_hook(unsigned int hook, const struct net_device *out, int (*okfn)(struct sk_buff *)) { - return ipt_do_table(skb, hook, in, out, packet_filter); + return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_filter); } static unsigned int @@ -89,7 +88,7 @@ ipt_local_out_hook(unsigned int hook, return NF_ACCEPT; } - return ipt_do_table(skb, hook, in, out, packet_filter); + return ipt_do_table(skb, hook, in, out, init_net.ipv4.iptable_filter); } static struct nf_hook_ops ipt_ops[] __read_mostly = { @@ -120,6 +119,26 @@ static struct nf_hook_ops ipt_ops[] __read_mostly = { static int forward = NF_ACCEPT; module_param(forward, bool, 0000); +static int __net_init iptable_filter_net_init(struct net *net) +{ + /* Register table */ + net->ipv4.iptable_filter = + ipt_register_table(net, &packet_filter, &initial_table.repl); + if (IS_ERR(net->ipv4.iptable_filter)) + return PTR_ERR(net->ipv4.iptable_filter); + return 0; +} + +static void __net_exit iptable_filter_net_exit(struct net *net) +{ + ipt_unregister_table(net->ipv4.iptable_filter); +} + +static struct pernet_operations iptable_filter_net_ops = { + .init = iptable_filter_net_init, + .exit = iptable_filter_net_exit, +}; + static int __init iptable_filter_init(void) { int ret; @@ -132,11 +151,9 @@ static int __init iptable_filter_init(void) /* Entry 1 is the FORWARD hook */ initial_table.entries[1].target.verdict = -forward - 1; - /* Register table */ - packet_filter = ipt_register_table(&init_net, &__packet_filter, - &initial_table.repl); - if (IS_ERR(packet_filter)) - return PTR_ERR(packet_filter); + ret = register_pernet_subsys(&iptable_filter_net_ops); + if (ret < 0) + return ret; /* Register hooks */ ret = nf_register_hooks(ipt_ops, ARRAY_SIZE(ipt_ops)); @@ -146,14 +163,14 @@ static int __init iptable_filter_init(void) return ret; cleanup_table: - ipt_unregister_table(packet_filter); + unregister_pernet_subsys(&iptable_filter_net_ops); return ret; } static void __exit iptable_filter_fini(void) { nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops)); - ipt_unregister_table(packet_filter); + unregister_pernet_subsys(&iptable_filter_net_ops); } module_init(iptable_filter_init); -- cgit v1.1