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 
is_tcf_tunnel_set(const struct tc_action * a)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;
32 
33 	params = rcu_dereference_protected(t->params,
34 					   lockdep_is_held(&a->tcfa_lock));
35 	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
36 		return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
37 #endif
38 	return false;
39 }
40 
is_tcf_tunnel_release(const struct tc_action * a)41 static inline bool is_tcf_tunnel_release(const struct tc_action *a)
42 {
43 #ifdef CONFIG_NET_CLS_ACT
44 	struct tcf_tunnel_key *t = to_tunnel_key(a);
45 	struct tcf_tunnel_key_params *params;
46 
47 	params = rcu_dereference_protected(t->params,
48 					   lockdep_is_held(&a->tcfa_lock));
49 	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
50 		return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
51 #endif
52 	return false;
53 }
54 
tcf_tunnel_info(const struct tc_action * a)55 static inline struct ip_tunnel_info *tcf_tunnel_info(const struct tc_action *a)
56 {
57 #ifdef CONFIG_NET_CLS_ACT
58 	struct tcf_tunnel_key *t = to_tunnel_key(a);
59 	struct tcf_tunnel_key_params *params;
60 
61 	params = rcu_dereference_protected(t->params,
62 					   lockdep_is_held(&a->tcfa_lock));
63 
64 	return &params->tcft_enc_metadata->u.tun_info;
65 #else
66 	return NULL;
67 #endif
68 }
69 
70 static inline struct ip_tunnel_info *
tcf_tunnel_info_copy(const struct tc_action * a)71 tcf_tunnel_info_copy(const struct tc_action *a)
72 {
73 #ifdef CONFIG_NET_CLS_ACT
74 	struct ip_tunnel_info *tun = tcf_tunnel_info(a);
75 
76 	if (tun) {
77 		size_t tun_size = sizeof(*tun) + tun->options_len;
78 		struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
79 							  GFP_ATOMIC);
80 
81 		return tun_copy;
82 	}
83 #endif
84 	return NULL;
85 }
86 #endif /* __NET_TC_TUNNEL_KEY_H */
87