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 int action; 18 struct metadata_dst *tcft_enc_metadata; 19 }; 20 21 struct 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 28 static 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 42 static 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 56 static 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 ¶ms->tcft_enc_metadata->u.tun_info; 66 #else 67 return NULL; 68 #endif 69 } 70 71 static inline struct ip_tunnel_info * 72 tcf_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 */ 88