1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
4  * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
5  */
6 
7 #ifndef __NET_TC_TUNNEL_KEY_H
8 #define __NET_TC_TUNNEL_KEY_H
9 
10 #include <net/act_api.h>
11 #include <linux/tc_act/tc_tunnel_key.h>
12 #include <net/dst_metadata.h>
13 
14 struct tcf_tunnel_key_params {
15 	struct rcu_head		rcu;
16 	int			tcft_action;
17 	struct metadata_dst     *tcft_enc_metadata;
18 };
19 
20 struct tcf_tunnel_key {
21 	struct tc_action	      common;
22 	struct tcf_tunnel_key_params __rcu *params;
23 };
24 
25 #define to_tunnel_key(a) ((struct tcf_tunnel_key *)a)
26 
27 static inline bool is_tcf_tunnel_set(const struct tc_action *a)
28 {
29 #ifdef CONFIG_NET_CLS_ACT
30 	struct tcf_tunnel_key *t = to_tunnel_key(a);
31 	struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
32 
33 	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
34 		return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
35 #endif
36 	return false;
37 }
38 
39 static inline bool is_tcf_tunnel_release(const struct tc_action *a)
40 {
41 #ifdef CONFIG_NET_CLS_ACT
42 	struct tcf_tunnel_key *t = to_tunnel_key(a);
43 	struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
44 
45 	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
46 		return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
47 #endif
48 	return false;
49 }
50 
51 static inline struct ip_tunnel_info *tcf_tunnel_info(const struct tc_action *a)
52 {
53 #ifdef CONFIG_NET_CLS_ACT
54 	struct tcf_tunnel_key *t = to_tunnel_key(a);
55 	struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
56 
57 	return &params->tcft_enc_metadata->u.tun_info;
58 #else
59 	return NULL;
60 #endif
61 }
62 
63 static inline struct ip_tunnel_info *
64 tcf_tunnel_info_copy(const struct tc_action *a)
65 {
66 #ifdef CONFIG_NET_CLS_ACT
67 	struct ip_tunnel_info *tun = tcf_tunnel_info(a);
68 
69 	if (tun) {
70 		size_t tun_size = sizeof(*tun) + tun->options_len;
71 		struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
72 							  GFP_KERNEL);
73 
74 		return tun_copy;
75 	}
76 #endif
77 	return NULL;
78 }
79 #endif /* __NET_TC_TUNNEL_KEY_H */
80