1#ifndef _NET_NF_TABLES_OFFLOAD_H
2#define _NET_NF_TABLES_OFFLOAD_H
3
4#include <net/flow_offload.h>
5#include <net/netfilter/nf_tables.h>
6
7enum nft_offload_reg_flags {
8	NFT_OFFLOAD_F_NETWORK2HOST	= (1 << 0),
9};
10
11struct nft_offload_reg {
12	u32		key;
13	u32		len;
14	u32		base_offset;
15	u32		offset;
16	u32		flags;
17	struct nft_data data;
18	struct nft_data	mask;
19};
20
21enum nft_offload_dep_type {
22	NFT_OFFLOAD_DEP_UNSPEC	= 0,
23	NFT_OFFLOAD_DEP_NETWORK,
24	NFT_OFFLOAD_DEP_TRANSPORT,
25};
26
27struct nft_offload_ctx {
28	struct {
29		enum nft_offload_dep_type	type;
30		__be16				l3num;
31		u8				protonum;
32	} dep;
33	unsigned int				num_actions;
34	struct net				*net;
35	struct nft_offload_reg			regs[NFT_REG32_15 + 1];
36};
37
38void nft_offload_set_dependency(struct nft_offload_ctx *ctx,
39				enum nft_offload_dep_type type);
40void nft_offload_update_dependency(struct nft_offload_ctx *ctx,
41				   const void *data, u32 len);
42
43struct nft_flow_key {
44	struct flow_dissector_key_basic			basic;
45	struct flow_dissector_key_control		control;
46	union {
47		struct flow_dissector_key_ipv4_addrs	ipv4;
48		struct flow_dissector_key_ipv6_addrs	ipv6;
49	};
50	struct flow_dissector_key_ports			tp;
51	struct flow_dissector_key_ip			ip;
52	struct flow_dissector_key_vlan			vlan;
53	struct flow_dissector_key_vlan			cvlan;
54	struct flow_dissector_key_eth_addrs		eth_addrs;
55	struct flow_dissector_key_meta			meta;
56} __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
57
58struct nft_flow_match {
59	struct flow_dissector	dissector;
60	struct nft_flow_key	key;
61	struct nft_flow_key	mask;
62};
63
64struct nft_flow_rule {
65	__be16			proto;
66	struct nft_flow_match	match;
67	struct flow_rule	*rule;
68};
69
70void nft_flow_rule_set_addr_type(struct nft_flow_rule *flow,
71				 enum flow_dissector_key_id addr_type);
72
73struct nft_rule;
74struct nft_flow_rule *nft_flow_rule_create(struct net *net, const struct nft_rule *rule);
75int nft_flow_rule_stats(const struct nft_chain *chain, const struct nft_rule *rule);
76void nft_flow_rule_destroy(struct nft_flow_rule *flow);
77int nft_flow_rule_offload_commit(struct net *net);
78
79#define NFT_OFFLOAD_MATCH_FLAGS(__key, __base, __field, __len, __reg, __flags)	\
80	(__reg)->base_offset	=					\
81		offsetof(struct nft_flow_key, __base);			\
82	(__reg)->offset		=					\
83		offsetof(struct nft_flow_key, __base.__field);		\
84	(__reg)->len		= __len;				\
85	(__reg)->key		= __key;				\
86	(__reg)->flags		= __flags;
87
88#define NFT_OFFLOAD_MATCH(__key, __base, __field, __len, __reg)		\
89	NFT_OFFLOAD_MATCH_FLAGS(__key, __base, __field, __len, __reg, 0)
90
91#define NFT_OFFLOAD_MATCH_EXACT(__key, __base, __field, __len, __reg)	\
92	NFT_OFFLOAD_MATCH(__key, __base, __field, __len, __reg)		\
93	memset(&(__reg)->mask, 0xff, (__reg)->len);
94
95bool nft_chain_offload_support(const struct nft_base_chain *basechain);
96
97int nft_offload_init(void);
98void nft_offload_exit(void);
99
100#endif
101