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)27static 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)41static 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)55static 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 ¶ms->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)71tcf_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