sched: Prevent balance_push() on remote runqueues
[linux-2.6-microblaze.git] / net / netfilter / nf_flow_table_inet.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/kernel.h>
3 #include <linux/init.h>
4 #include <linux/module.h>
5 #include <linux/netfilter.h>
6 #include <linux/rhashtable.h>
7 #include <net/netfilter/nf_flow_table.h>
8 #include <net/netfilter/nf_tables.h>
9
10 static unsigned int
11 nf_flow_offload_inet_hook(void *priv, struct sk_buff *skb,
12                           const struct nf_hook_state *state)
13 {
14         switch (skb->protocol) {
15         case htons(ETH_P_IP):
16                 return nf_flow_offload_ip_hook(priv, skb, state);
17         case htons(ETH_P_IPV6):
18                 return nf_flow_offload_ipv6_hook(priv, skb, state);
19         }
20
21         return NF_ACCEPT;
22 }
23
24 static int nf_flow_rule_route_inet(struct net *net,
25                                    const struct flow_offload *flow,
26                                    enum flow_offload_tuple_dir dir,
27                                    struct nf_flow_rule *flow_rule)
28 {
29         const struct flow_offload_tuple *flow_tuple = &flow->tuplehash[dir].tuple;
30         int err;
31
32         switch (flow_tuple->l3proto) {
33         case NFPROTO_IPV4:
34                 err = nf_flow_rule_route_ipv4(net, flow, dir, flow_rule);
35                 break;
36         case NFPROTO_IPV6:
37                 err = nf_flow_rule_route_ipv6(net, flow, dir, flow_rule);
38                 break;
39         default:
40                 err = -1;
41                 break;
42         }
43
44         return err;
45 }
46
47 static struct nf_flowtable_type flowtable_inet = {
48         .family         = NFPROTO_INET,
49         .init           = nf_flow_table_init,
50         .setup          = nf_flow_table_offload_setup,
51         .action         = nf_flow_rule_route_inet,
52         .free           = nf_flow_table_free,
53         .hook           = nf_flow_offload_inet_hook,
54         .owner          = THIS_MODULE,
55 };
56
57 static int __init nf_flow_inet_module_init(void)
58 {
59         nft_register_flowtable_type(&flowtable_inet);
60
61         return 0;
62 }
63
64 static void __exit nf_flow_inet_module_exit(void)
65 {
66         nft_unregister_flowtable_type(&flowtable_inet);
67 }
68
69 module_init(nf_flow_inet_module_init);
70 module_exit(nf_flow_inet_module_exit);
71
72 MODULE_LICENSE("GPL");
73 MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
74 MODULE_ALIAS_NF_FLOWTABLE(1); /* NFPROTO_INET */
75 MODULE_DESCRIPTION("Netfilter flow table mixed IPv4/IPv6 module");