Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __NET_ACT_API_H |
| 2 | #define __NET_ACT_API_H |
| 3 | |
| 4 | /* |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 5 | * Public action API for classifiers/qdiscs |
| 6 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | |
| 8 | #include <net/sch_generic.h> |
| 9 | #include <net/pkt_sched.h> |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 10 | #include <net/net_namespace.h> |
| 11 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 13 | |
| 14 | struct tcf_hashinfo { |
| 15 | struct hlist_head *htab; |
| 16 | unsigned int hmask; |
| 17 | spinlock_t lock; |
| 18 | u32 index; |
| 19 | }; |
| 20 | |
| 21 | struct tc_action_ops; |
| 22 | |
| 23 | struct tc_action { |
| 24 | const struct tc_action_ops *ops; |
WANG Cong | ec0595c | 2016-07-25 16:09:42 -0700 | [diff] [blame] | 25 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
| 26 | __u32 order; |
| 27 | struct list_head list; |
| 28 | struct tcf_hashinfo *hinfo; |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 29 | |
WANG Cong | ec0595c | 2016-07-25 16:09:42 -0700 | [diff] [blame] | 30 | struct hlist_node tcfa_head; |
| 31 | u32 tcfa_index; |
| 32 | int tcfa_refcnt; |
| 33 | int tcfa_bindcnt; |
| 34 | u32 tcfa_capab; |
| 35 | int tcfa_action; |
| 36 | struct tcf_t tcfa_tm; |
| 37 | struct gnet_stats_basic_packed tcfa_bstats; |
| 38 | struct gnet_stats_queue tcfa_qstats; |
| 39 | struct gnet_stats_rate_est64 tcfa_rate_est; |
| 40 | spinlock_t tcfa_lock; |
| 41 | struct rcu_head tcfa_rcu; |
Eric Dumazet | 519c818 | 2015-07-06 05:18:04 -0700 | [diff] [blame] | 42 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
| 43 | struct gnet_stats_queue __percpu *cpu_qstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | }; |
WANG Cong | ec0595c | 2016-07-25 16:09:42 -0700 | [diff] [blame] | 45 | #define tcf_act common.tcfa_act |
| 46 | #define tcf_head common.tcfa_head |
| 47 | #define tcf_index common.tcfa_index |
| 48 | #define tcf_refcnt common.tcfa_refcnt |
| 49 | #define tcf_bindcnt common.tcfa_bindcnt |
| 50 | #define tcf_capab common.tcfa_capab |
| 51 | #define tcf_action common.tcfa_action |
| 52 | #define tcf_tm common.tcfa_tm |
| 53 | #define tcf_bstats common.tcfa_bstats |
| 54 | #define tcf_qstats common.tcfa_qstats |
| 55 | #define tcf_rate_est common.tcfa_rate_est |
| 56 | #define tcf_lock common.tcfa_lock |
| 57 | #define tcf_rcu common.tcfa_rcu |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 58 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 59 | static inline unsigned int tcf_hash(u32 index, unsigned int hmask) |
| 60 | { |
| 61 | return index & hmask; |
| 62 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
WANG Cong | 369ba56 | 2013-12-15 20:15:08 -0800 | [diff] [blame] | 64 | static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask) |
| 65 | { |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 66 | int i; |
| 67 | |
| 68 | spin_lock_init(&hf->lock); |
WANG Cong | ddafd34 | 2014-01-09 16:13:59 -0800 | [diff] [blame] | 69 | hf->index = 0; |
WANG Cong | 369ba56 | 2013-12-15 20:15:08 -0800 | [diff] [blame] | 70 | hf->hmask = mask; |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 71 | hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head), |
WANG Cong | 369ba56 | 2013-12-15 20:15:08 -0800 | [diff] [blame] | 72 | GFP_KERNEL); |
| 73 | if (!hf->htab) |
| 74 | return -ENOMEM; |
WANG Cong | 89819dc | 2013-12-15 20:15:09 -0800 | [diff] [blame] | 75 | for (i = 0; i < mask + 1; i++) |
| 76 | INIT_HLIST_HEAD(&hf->htab[i]); |
WANG Cong | 369ba56 | 2013-12-15 20:15:08 -0800 | [diff] [blame] | 77 | return 0; |
| 78 | } |
| 79 | |
Eric Dumazet | 56e5d1c | 2015-07-06 05:18:08 -0700 | [diff] [blame] | 80 | /* Update lastuse only if needed, to avoid dirtying a cache line. |
| 81 | * We use a temp variable to avoid fetching jiffies twice. |
| 82 | */ |
| 83 | static inline void tcf_lastuse_update(struct tcf_t *tm) |
| 84 | { |
| 85 | unsigned long now = jiffies; |
| 86 | |
| 87 | if (tm->lastuse != now) |
| 88 | tm->lastuse = now; |
Jamal Hadi Salim | 53eb440 | 2016-06-06 06:32:54 -0400 | [diff] [blame] | 89 | if (unlikely(!tm->firstuse)) |
| 90 | tm->firstuse = now; |
Eric Dumazet | 56e5d1c | 2015-07-06 05:18:08 -0700 | [diff] [blame] | 91 | } |
| 92 | |
Jamal Hadi Salim | 48d8ee1 | 2016-06-06 06:32:55 -0400 | [diff] [blame] | 93 | static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) |
| 94 | { |
| 95 | dtm->install = jiffies_to_clock_t(jiffies - stm->install); |
| 96 | dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); |
| 97 | dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse); |
| 98 | dtm->expires = jiffies_to_clock_t(stm->expires); |
| 99 | } |
| 100 | |
Amir Vadai | 00175ae | 2016-03-08 12:42:31 +0200 | [diff] [blame] | 101 | #ifdef CONFIG_NET_CLS_ACT |
| 102 | |
| 103 | #define ACT_P_CREATED 1 |
| 104 | #define ACT_P_DELETED 1 |
| 105 | |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 106 | struct tc_action_ops { |
WANG Cong | 1f747c2 | 2013-12-15 20:15:10 -0800 | [diff] [blame] | 107 | struct list_head head; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | char kind[IFNAMSIZ]; |
| 109 | __u32 type; /* TBD to match kind */ |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 110 | size_t size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | struct module *owner; |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 112 | int (*act)(struct sk_buff *, const struct tc_action *, |
| 113 | struct tcf_result *); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 114 | int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
WANG Cong | a5b5c95 | 2014-02-11 17:07:32 -0800 | [diff] [blame] | 115 | void (*cleanup)(struct tc_action *, int bind); |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 116 | int (*lookup)(struct net *, struct tc_action **, u32); |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 117 | int (*init)(struct net *net, struct nlattr *nla, |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 118 | struct nlattr *est, struct tc_action **act, int ovr, |
Benjamin LaHaise | c1b5273 | 2013-01-14 05:15:39 +0000 | [diff] [blame] | 119 | int bind); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 120 | int (*walk)(struct net *, struct sk_buff *, |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 121 | struct netlink_callback *, int, const struct tc_action_ops *); |
Amir Vadai | 3804070 | 2016-05-13 12:55:35 +0000 | [diff] [blame] | 122 | void (*stats_update)(struct tc_action *, u64, u32, u64); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | }; |
| 124 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 125 | struct tc_action_net { |
| 126 | struct tcf_hashinfo *hinfo; |
| 127 | const struct tc_action_ops *ops; |
| 128 | }; |
| 129 | |
| 130 | static inline |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 131 | int tc_action_net_init(struct tc_action_net *tn, |
| 132 | const struct tc_action_ops *ops, unsigned int mask) |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 133 | { |
| 134 | int err = 0; |
| 135 | |
| 136 | tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL); |
| 137 | if (!tn->hinfo) |
| 138 | return -ENOMEM; |
| 139 | tn->ops = ops; |
| 140 | err = tcf_hashinfo_init(tn->hinfo, mask); |
| 141 | if (err) |
| 142 | kfree(tn->hinfo); |
| 143 | return err; |
| 144 | } |
| 145 | |
| 146 | void tcf_hashinfo_destroy(const struct tc_action_ops *ops, |
| 147 | struct tcf_hashinfo *hinfo); |
| 148 | |
| 149 | static inline void tc_action_net_exit(struct tc_action_net *tn) |
| 150 | { |
| 151 | tcf_hashinfo_destroy(tn->ops, tn->hinfo); |
WANG Cong | 18fcf49 | 2016-04-04 10:32:48 -0700 | [diff] [blame] | 152 | kfree(tn->hinfo); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, |
| 156 | struct netlink_callback *cb, int type, |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 157 | const struct tc_action_ops *ops); |
| 158 | int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 159 | u32 tcf_hash_new_index(struct tc_action_net *tn); |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 160 | bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a, |
WANG Cong | b231307 | 2016-06-13 13:46:28 -0700 | [diff] [blame] | 161 | int bind); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 162 | int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
WANG Cong | a85a970 | 2016-07-25 16:09:41 -0700 | [diff] [blame] | 163 | struct tc_action **a, const struct tc_action_ops *ops, int bind, |
| 164 | bool cpustats); |
WANG Cong | 8606203 | 2014-02-11 17:07:31 -0800 | [diff] [blame] | 165 | void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est); |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 166 | void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a); |
David S. Miller | e9ce1cd | 2006-08-21 23:54:55 -0700 | [diff] [blame] | 167 | |
Daniel Borkmann | 28e6b67 | 2015-07-29 23:35:25 +0200 | [diff] [blame] | 168 | int __tcf_hash_release(struct tc_action *a, bool bind, bool strict); |
| 169 | |
| 170 | static inline int tcf_hash_release(struct tc_action *a, bool bind) |
| 171 | { |
| 172 | return __tcf_hash_release(a, bind, false); |
| 173 | } |
| 174 | |
WANG Cong | ddf97cc | 2016-02-22 15:57:53 -0800 | [diff] [blame] | 175 | int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
Jamal Hadi Salim | 0b0f43f | 2016-06-05 10:41:32 -0400 | [diff] [blame] | 176 | int tcf_unregister_action(struct tc_action_ops *a, |
| 177 | struct pernet_operations *ops); |
WANG Cong | 55334a5 | 2014-02-11 17:07:34 -0800 | [diff] [blame] | 178 | int tcf_action_destroy(struct list_head *actions, int bind); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 179 | int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions, |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 180 | struct tcf_result *res); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 181 | int tcf_action_init(struct net *net, struct nlattr *nla, |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 182 | struct nlattr *est, char *n, int ovr, |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 183 | int bind, struct list_head *); |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 184 | struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, |
| 185 | struct nlattr *est, char *n, int ovr, |
| 186 | int bind); |
WANG Cong | 33be627 | 2013-12-15 20:15:05 -0800 | [diff] [blame] | 187 | int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); |
Joe Perches | 5c15257 | 2013-07-30 22:47:13 -0700 | [diff] [blame] | 188 | int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
| 189 | int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); |
| 190 | int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); |
Amir Vadai | 00175ae | 2016-03-08 12:42:31 +0200 | [diff] [blame] | 191 | |
| 192 | #define tc_no_actions(_exts) \ |
| 193 | (list_empty(&(_exts)->actions)) |
| 194 | |
| 195 | #define tc_for_each_action(_a, _exts) \ |
| 196 | list_for_each_entry(a, &(_exts)->actions, list) |
Amir Vadai | 3804070 | 2016-05-13 12:55:35 +0000 | [diff] [blame] | 197 | |
Ido Schimmel | 86cb13e | 2016-07-25 13:12:33 +0300 | [diff] [blame] | 198 | #define tc_single_action(_exts) \ |
| 199 | (list_is_singular(&(_exts)->actions)) |
| 200 | |
Amir Vadai | 3804070 | 2016-05-13 12:55:35 +0000 | [diff] [blame] | 201 | static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, |
| 202 | u64 packets, u64 lastuse) |
| 203 | { |
| 204 | if (!a->ops->stats_update) |
| 205 | return; |
| 206 | |
| 207 | a->ops->stats_update(a, bytes, packets, lastuse); |
| 208 | } |
| 209 | |
Amir Vadai | 00175ae | 2016-03-08 12:42:31 +0200 | [diff] [blame] | 210 | #else /* CONFIG_NET_CLS_ACT */ |
| 211 | |
| 212 | #define tc_no_actions(_exts) true |
Arnd Bergmann | e6790fd | 2016-05-18 16:21:07 +0200 | [diff] [blame] | 213 | #define tc_for_each_action(_a, _exts) while ((void)(_a), 0) |
Ido Schimmel | 86cb13e | 2016-07-25 13:12:33 +0300 | [diff] [blame] | 214 | #define tc_single_action(_exts) false |
Amir Vadai | 3804070 | 2016-05-13 12:55:35 +0000 | [diff] [blame] | 215 | #define tcf_action_stats_update(a, bytes, packets, lastuse) |
Amir Vadai | 00175ae | 2016-03-08 12:42:31 +0200 | [diff] [blame] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | #endif /* CONFIG_NET_CLS_ACT */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | #endif |