include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...

[net-next-2.6.git] / net / ipv4 / netfilter / iptable_filter.c

diff --git a/net/ipv4/netfilter/iptable_filter.c b/net/ipv4/netfilter/iptable_filter.c
index dee90eb8aa47eceace5a04114a052cf0b83f4274..55392466daa49fd455a4c28d6b168c388db2eff2 100644 (file)
--- a/net/ipv4/netfilter/iptable_filter.c
+++ b/net/ipv4/netfilter/iptable_filter.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/netfilter_ipv4/ip_tables.h>
+#include <linux/slab.h>
 #include <net/ip.h>
 
 MODULE_LICENSE("GPL");
@@ -23,104 +24,32 @@ MODULE_DESCRIPTION("iptables filter table");
                            (1 << NF_INET_FORWARD) | \
                            (1 << NF_INET_LOCAL_OUT))
 
-static struct
-{
-       struct ipt_replace repl;
-       struct ipt_standard entries[3];
-       struct ipt_error term;
-} initial_table __net_initdata = {
-       .repl = {
-               .name = "filter",
-               .valid_hooks = FILTER_VALID_HOOKS,
-               .num_entries = 4,
-               .size = sizeof(struct ipt_standard) * 3 + sizeof(struct ipt_error),
-               .hook_entry = {
-                       [NF_INET_LOCAL_IN] = 0,
-                       [NF_INET_FORWARD] = sizeof(struct ipt_standard),
-                       [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard) * 2,
-               },
-               .underflow = {
-                       [NF_INET_LOCAL_IN] = 0,
-                       [NF_INET_FORWARD] = sizeof(struct ipt_standard),
-                       [NF_INET_LOCAL_OUT] = sizeof(struct ipt_standard) * 2,
-               },
-       },
-       .entries = {
-               IPT_STANDARD_INIT(NF_ACCEPT),   /* LOCAL_IN */
-               IPT_STANDARD_INIT(NF_ACCEPT),   /* FORWARD */
-               IPT_STANDARD_INIT(NF_ACCEPT),   /* LOCAL_OUT */
-       },
-       .term = IPT_ERROR_INIT,                 /* ERROR */
-};
-
 static const struct xt_table packet_filter = {
        .name           = "filter",
        .valid_hooks    = FILTER_VALID_HOOKS,
        .me             = THIS_MODULE,
        .af             = NFPROTO_IPV4,
+       .priority       = NF_IP_PRI_FILTER,
 };
 
-/* The work comes in here from netfilter.c. */
-static unsigned int
-ipt_local_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 ipt_do_table(skb, hook, in, out,
-                           dev_net(in)->ipv4.iptable_filter);
-}
-
 static unsigned int
-ipt_hook(unsigned int hook,
-        struct sk_buff *skb,
-        const struct net_device *in,
-        const struct net_device *out,
-        int (*okfn)(struct sk_buff *))
+iptable_filter_hook(unsigned int hook, struct sk_buff *skb,
+                   const struct net_device *in, const struct net_device *out,
+                   int (*okfn)(struct sk_buff *))
 {
-       return ipt_do_table(skb, hook, in, out,
-                           dev_net(in)->ipv4.iptable_filter);
-}
+       const struct net *net;
 
-static unsigned int
-ipt_local_out_hook(unsigned int hook,
-                  struct sk_buff *skb,
-                  const struct net_device *in,
-                  const struct net_device *out,
-                  int (*okfn)(struct sk_buff *))
-{
-       /* root is playing with raw sockets. */
-       if (skb->len < sizeof(struct iphdr) ||
-           ip_hdrlen(skb) < sizeof(struct iphdr))
+       if (hook == NF_INET_LOCAL_OUT &&
+           (skb->len < sizeof(struct iphdr) ||
+            ip_hdrlen(skb) < sizeof(struct iphdr)))
+               /* root is playing with raw sockets. */
                return NF_ACCEPT;
-       return ipt_do_table(skb, hook, in, out,
-                           dev_net(out)->ipv4.iptable_filter);
+
+       net = dev_net((in != NULL) ? in : out);
+       return ipt_do_table(skb, hook, in, out, net->ipv4.iptable_filter);
 }
 
-static struct nf_hook_ops ipt_ops[] __read_mostly = {
-       {
-               .hook           = ipt_local_in_hook,
-               .owner          = THIS_MODULE,
-               .pf             = NFPROTO_IPV4,
-               .hooknum        = NF_INET_LOCAL_IN,
-               .priority       = NF_IP_PRI_FILTER,
-       },
-       {
-               .hook           = ipt_hook,
-               .owner          = THIS_MODULE,
-               .pf             = NFPROTO_IPV4,
-               .hooknum        = NF_INET_FORWARD,
-               .priority       = NF_IP_PRI_FILTER,
-       },
-       {
-               .hook           = ipt_local_out_hook,
-               .owner          = THIS_MODULE,
-               .pf             = NFPROTO_IPV4,
-               .hooknum        = NF_INET_LOCAL_OUT,
-               .priority       = NF_IP_PRI_FILTER,
-       },
-};
+static struct nf_hook_ops *filter_ops __read_mostly;
 
 /* Default to forward because I got too much mail already. */
 static int forward = NF_ACCEPT;
@@ -128,9 +57,18 @@ module_param(forward, bool, 0000);
 
 static int __net_init iptable_filter_net_init(struct net *net)
 {
-       /* Register table */
+       struct ipt_replace *repl;
+
+       repl = ipt_alloc_initial_table(&packet_filter);
+       if (repl == NULL)
+               return -ENOMEM;
+       /* Entry 1 is the FORWARD hook */
+       ((struct ipt_standard *)repl->entries)[1].target.verdict =
+               -forward - 1;
+
        net->ipv4.iptable_filter =
-               ipt_register_table(net, &packet_filter, &initial_table.repl);
+               ipt_register_table(net, &packet_filter, repl);
+       kfree(repl);
        if (IS_ERR(net->ipv4.iptable_filter))
                return PTR_ERR(net->ipv4.iptable_filter);
        return 0;
@@ -155,17 +93,16 @@ static int __init iptable_filter_init(void)
                return -EINVAL;
        }
 
-       /* Entry 1 is the FORWARD hook */
-       initial_table.entries[1].target.verdict = -forward - 1;
-
        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));
-       if (ret < 0)
+       filter_ops = xt_hook_link(&packet_filter, iptable_filter_hook);
+       if (IS_ERR(filter_ops)) {
+               ret = PTR_ERR(filter_ops);
                goto cleanup_table;
+       }
 
        return ret;
 
@@ -176,7 +113,7 @@ static int __init iptable_filter_init(void)
 
 static void __exit iptable_filter_fini(void)
 {
-       nf_unregister_hooks(ipt_ops, ARRAY_SIZE(ipt_ops));
+       xt_hook_unlink(&packet_filter, filter_ops);
        unregister_pernet_subsys(&iptable_filter_net_ops);
 }