1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NET_TC_IFE_H
3 #define __NET_TC_IFE_H
4 
5 #include <net/act_api.h>
6 #include <linux/etherdevice.h>
7 #include <linux/rtnetlink.h>
8 
9 struct module;
10 
11 struct tcf_ife_params {
12 	u8 eth_dst[ETH_ALEN];
13 	u8 eth_src[ETH_ALEN];
14 	u16 eth_type;
15 	u16 flags;
16 
17 	struct rcu_head rcu;
18 };
19 
20 struct tcf_ife_info {
21 	struct tc_action common;
22 	struct tcf_ife_params __rcu *params;
23 	/* list of metaids allowed */
24 	struct list_head metalist;
25 };
26 #define to_ife(a) ((struct tcf_ife_info *)a)
27 
28 struct tcf_meta_info {
29 	const struct tcf_meta_ops *ops;
30 	void *metaval;
31 	u16 metaid;
32 	struct list_head metalist;
33 };
34 
35 struct tcf_meta_ops {
36 	u16 metaid; /*Maintainer provided ID */
37 	u16 metatype; /*netlink attribute type (look at net/netlink.h) */
38 	const char *name;
39 	const char *synopsis;
40 	struct list_head list;
41 	int	(*check_presence)(struct sk_buff *, struct tcf_meta_info *);
42 	int	(*encode)(struct sk_buff *, void *, struct tcf_meta_info *);
43 	int	(*decode)(struct sk_buff *, void *, u16 len);
44 	int	(*get)(struct sk_buff *skb, struct tcf_meta_info *mi);
45 	int	(*alloc)(struct tcf_meta_info *, void *, gfp_t);
46 	void	(*release)(struct tcf_meta_info *);
47 	int	(*validate)(void *val, int len);
48 	struct module	*owner;
49 };
50 
51 #define MODULE_ALIAS_IFE_META(metan)   MODULE_ALIAS("ife-meta-" metan)
52 
53 int ife_get_meta_u32(struct sk_buff *skb, struct tcf_meta_info *mi);
54 int ife_get_meta_u16(struct sk_buff *skb, struct tcf_meta_info *mi);
55 int ife_alloc_meta_u32(struct tcf_meta_info *mi, void *metaval, gfp_t gfp);
56 int ife_alloc_meta_u16(struct tcf_meta_info *mi, void *metaval, gfp_t gfp);
57 int ife_check_meta_u32(u32 metaval, struct tcf_meta_info *mi);
58 int ife_check_meta_u16(u16 metaval, struct tcf_meta_info *mi);
59 int ife_encode_meta_u32(u32 metaval, void *skbdata, struct tcf_meta_info *mi);
60 int ife_validate_meta_u32(void *val, int len);
61 int ife_validate_meta_u16(void *val, int len);
62 int ife_encode_meta_u16(u16 metaval, void *skbdata, struct tcf_meta_info *mi);
63 void ife_release_meta_gen(struct tcf_meta_info *mi);
64 int register_ife_op(struct tcf_meta_ops *mops);
65 int unregister_ife_op(struct tcf_meta_ops *mops);
66 
67 #endif /* __NET_TC_IFE_H */
68