tc_tunnel_key.h

 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
14struct tcf_tunnel_key_params {
15	struct rcu_head		rcu;
16	int			tcft_action;
17	int			action;
18	struct metadata_dst     *tcft_enc_metadata;
19};
20
21struct tcf_tunnel_key {
22	struct tc_action	      common;
23	struct tcf_tunnel_key_params __rcu *params;
24};
25
26#define to_tunnel_key(a) ((struct tcf_tunnel_key *)a)
27
28static inline bool is_tcf_tunnel_set(const struct tc_action *a)
29{
30#ifdef CONFIG_NET_CLS_ACT
31	struct tcf_tunnel_key *t = to_tunnel_key(a);
32	struct tcf_tunnel_key_params *params;
33
34	params = rcu_dereference_protected(t->params,
35					   lockdep_is_held(&a->tcfa_lock));
36	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
37		return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
38#endif
39	return false;
40}
41
42static inline bool is_tcf_tunnel_release(const struct tc_action *a)
43{
44#ifdef CONFIG_NET_CLS_ACT
45	struct tcf_tunnel_key *t = to_tunnel_key(a);
46	struct tcf_tunnel_key_params *params;
47
48	params = rcu_dereference_protected(t->params,
49					   lockdep_is_held(&a->tcfa_lock));
50	if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
51		return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
52#endif
53	return false;
54}
55
56static inline struct ip_tunnel_info *tcf_tunnel_info(const struct tc_action *a)
57{
58#ifdef CONFIG_NET_CLS_ACT
59	struct tcf_tunnel_key *t = to_tunnel_key(a);
60	struct tcf_tunnel_key_params *params;
61
62	params = rcu_dereference_protected(t->params,
63					   lockdep_is_held(&a->tcfa_lock));
64
65	return &params->tcft_enc_metadata->u.tun_info;
66#else
67	return NULL;
68#endif
69}
70
71static inline struct ip_tunnel_info *
72tcf_tunnel_info_copy(const struct tc_action *a)
73{
74#ifdef CONFIG_NET_CLS_ACT
75	struct ip_tunnel_info *tun = tcf_tunnel_info(a);
76
77	if (tun) {
78		size_t tun_size = sizeof(*tun) + tun->options_len;
79		struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
80							  GFP_ATOMIC);
81
82		return tun_copy;
83	}
84#endif
85	return NULL;
86}
87#endif /* __NET_TC_TUNNEL_KEY_H */