Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __NET_PKT_CLS_H |
| 3 | #define __NET_PKT_CLS_H |
| 4 | |
| 5 | #include <linux/pkt_cls.h> |
| 6 | #include <linux/workqueue.h> |
| 7 | #include <net/sch_generic.h> |
| 8 | #include <net/act_api.h> |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 9 | #include <net/net_namespace.h> |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 10 | |
| 11 | /* TC action not accessible from user space */ |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 12 | #define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 13 | |
| 14 | /* Basic packet classifier frontend definitions. */ |
| 15 | |
| 16 | struct tcf_walker { |
| 17 | int stop; |
| 18 | int skip; |
| 19 | int count; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 20 | bool nonempty; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 21 | unsigned long cookie; |
| 22 | int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *); |
| 23 | }; |
| 24 | |
| 25 | int register_tcf_proto_ops(struct tcf_proto_ops *ops); |
| 26 | int unregister_tcf_proto_ops(struct tcf_proto_ops *ops); |
| 27 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 28 | struct tcf_block_ext_info { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 29 | enum flow_block_binder_type binder_type; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 30 | tcf_chain_head_change_t *chain_head_change; |
| 31 | void *chain_head_change_priv; |
| 32 | u32 block_index; |
| 33 | }; |
| 34 | |
| 35 | struct tcf_block_cb; |
| 36 | bool tcf_queue_work(struct rcu_work *rwork, work_func_t func); |
| 37 | |
| 38 | #ifdef CONFIG_NET_CLS |
| 39 | struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block, |
| 40 | u32 chain_index); |
| 41 | void tcf_chain_put_by_act(struct tcf_chain *chain); |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 42 | struct tcf_chain *tcf_get_next_chain(struct tcf_block *block, |
| 43 | struct tcf_chain *chain); |
| 44 | struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain, |
| 45 | struct tcf_proto *tp, bool rtnl_held); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 46 | void tcf_block_netif_keep_dst(struct tcf_block *block); |
| 47 | int tcf_block_get(struct tcf_block **p_block, |
| 48 | struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, |
| 49 | struct netlink_ext_ack *extack); |
| 50 | int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, |
| 51 | struct tcf_block_ext_info *ei, |
| 52 | struct netlink_ext_ack *extack); |
| 53 | void tcf_block_put(struct tcf_block *block); |
| 54 | void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, |
| 55 | struct tcf_block_ext_info *ei); |
| 56 | |
| 57 | static inline bool tcf_block_shared(struct tcf_block *block) |
| 58 | { |
| 59 | return block->index; |
| 60 | } |
| 61 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 62 | static inline bool tcf_block_non_null_shared(struct tcf_block *block) |
| 63 | { |
| 64 | return block && block->index; |
| 65 | } |
| 66 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 67 | static inline struct Qdisc *tcf_block_q(struct tcf_block *block) |
| 68 | { |
| 69 | WARN_ON(tcf_block_shared(block)); |
| 70 | return block->q; |
| 71 | } |
| 72 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 73 | int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
| 74 | struct tcf_result *res, bool compat_mode); |
| 75 | |
| 76 | #else |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 77 | static inline bool tcf_block_shared(struct tcf_block *block) |
| 78 | { |
| 79 | return false; |
| 80 | } |
| 81 | |
| 82 | static inline bool tcf_block_non_null_shared(struct tcf_block *block) |
| 83 | { |
| 84 | return false; |
| 85 | } |
| 86 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 87 | static inline |
| 88 | int tcf_block_get(struct tcf_block **p_block, |
| 89 | struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, |
| 90 | struct netlink_ext_ack *extack) |
| 91 | { |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static inline |
| 96 | int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q, |
| 97 | struct tcf_block_ext_info *ei, |
| 98 | struct netlink_ext_ack *extack) |
| 99 | { |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static inline void tcf_block_put(struct tcf_block *block) |
| 104 | { |
| 105 | } |
| 106 | |
| 107 | static inline |
| 108 | void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q, |
| 109 | struct tcf_block_ext_info *ei) |
| 110 | { |
| 111 | } |
| 112 | |
| 113 | static inline struct Qdisc *tcf_block_q(struct tcf_block *block) |
| 114 | { |
| 115 | return NULL; |
| 116 | } |
| 117 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 118 | static inline |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 119 | int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 120 | void *cb_priv) |
| 121 | { |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static inline |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 126 | void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 127 | void *cb_priv) |
| 128 | { |
| 129 | } |
| 130 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 131 | static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
| 132 | struct tcf_result *res, bool compat_mode) |
| 133 | { |
| 134 | return TC_ACT_UNSPEC; |
| 135 | } |
| 136 | #endif |
| 137 | |
| 138 | static inline unsigned long |
| 139 | __cls_set_class(unsigned long *clp, unsigned long cl) |
| 140 | { |
| 141 | return xchg(clp, cl); |
| 142 | } |
| 143 | |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame^] | 144 | static inline void |
| 145 | __tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 146 | { |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame^] | 147 | unsigned long cl; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 148 | |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame^] | 149 | cl = q->ops->cl_ops->bind_tcf(q, base, r->classid); |
| 150 | cl = __cls_set_class(&r->class, cl); |
| 151 | if (cl) |
| 152 | q->ops->cl_ops->unbind_tcf(q, cl); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | static inline void |
| 156 | tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base) |
| 157 | { |
| 158 | struct Qdisc *q = tp->chain->block->q; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 159 | |
| 160 | /* Check q as it is not set for shared blocks. In that case, |
| 161 | * setting class is not supported. |
| 162 | */ |
| 163 | if (!q) |
| 164 | return; |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame^] | 165 | sch_tree_lock(q); |
| 166 | __tcf_bind_filter(q, r, base); |
| 167 | sch_tree_unlock(q); |
| 168 | } |
| 169 | |
| 170 | static inline void |
| 171 | __tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r) |
| 172 | { |
| 173 | unsigned long cl; |
| 174 | |
| 175 | if ((cl = __cls_set_class(&r->class, 0)) != 0) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 176 | q->ops->cl_ops->unbind_tcf(q, cl); |
| 177 | } |
| 178 | |
| 179 | static inline void |
| 180 | tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r) |
| 181 | { |
| 182 | struct Qdisc *q = tp->chain->block->q; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 183 | |
| 184 | if (!q) |
| 185 | return; |
Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame^] | 186 | __tcf_unbind_filter(q, r); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | struct tcf_exts { |
| 190 | #ifdef CONFIG_NET_CLS_ACT |
| 191 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
| 192 | int nr_actions; |
| 193 | struct tc_action **actions; |
| 194 | struct net *net; |
| 195 | #endif |
| 196 | /* Map to export classifier specific extension TLV types to the |
| 197 | * generic extensions API. Unsupported extensions must be set to 0. |
| 198 | */ |
| 199 | int action; |
| 200 | int police; |
| 201 | }; |
| 202 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 203 | static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net, |
| 204 | int action, int police) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 205 | { |
| 206 | #ifdef CONFIG_NET_CLS_ACT |
| 207 | exts->type = 0; |
| 208 | exts->nr_actions = 0; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 209 | exts->net = net; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 210 | exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *), |
| 211 | GFP_KERNEL); |
| 212 | if (!exts->actions) |
| 213 | return -ENOMEM; |
| 214 | #endif |
| 215 | exts->action = action; |
| 216 | exts->police = police; |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | /* Return false if the netns is being destroyed in cleanup_net(). Callers |
| 221 | * need to do cleanup synchronously in this case, otherwise may race with |
| 222 | * tc_action_net_exit(). Return true for other cases. |
| 223 | */ |
| 224 | static inline bool tcf_exts_get_net(struct tcf_exts *exts) |
| 225 | { |
| 226 | #ifdef CONFIG_NET_CLS_ACT |
| 227 | exts->net = maybe_get_net(exts->net); |
| 228 | return exts->net != NULL; |
| 229 | #else |
| 230 | return true; |
| 231 | #endif |
| 232 | } |
| 233 | |
| 234 | static inline void tcf_exts_put_net(struct tcf_exts *exts) |
| 235 | { |
| 236 | #ifdef CONFIG_NET_CLS_ACT |
| 237 | if (exts->net) |
| 238 | put_net(exts->net); |
| 239 | #endif |
| 240 | } |
| 241 | |
| 242 | #ifdef CONFIG_NET_CLS_ACT |
| 243 | #define tcf_exts_for_each_action(i, a, exts) \ |
| 244 | for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++) |
| 245 | #else |
| 246 | #define tcf_exts_for_each_action(i, a, exts) \ |
| 247 | for (; 0; (void)(i), (void)(a), (void)(exts)) |
| 248 | #endif |
| 249 | |
| 250 | static inline void |
| 251 | tcf_exts_stats_update(const struct tcf_exts *exts, |
| 252 | u64 bytes, u64 packets, u64 lastuse) |
| 253 | { |
| 254 | #ifdef CONFIG_NET_CLS_ACT |
| 255 | int i; |
| 256 | |
| 257 | preempt_disable(); |
| 258 | |
| 259 | for (i = 0; i < exts->nr_actions; i++) { |
| 260 | struct tc_action *a = exts->actions[i]; |
| 261 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 262 | tcf_action_stats_update(a, bytes, packets, lastuse, true); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | preempt_enable(); |
| 266 | #endif |
| 267 | } |
| 268 | |
| 269 | /** |
| 270 | * tcf_exts_has_actions - check if at least one action is present |
| 271 | * @exts: tc filter extensions handle |
| 272 | * |
| 273 | * Returns true if at least one action is present. |
| 274 | */ |
| 275 | static inline bool tcf_exts_has_actions(struct tcf_exts *exts) |
| 276 | { |
| 277 | #ifdef CONFIG_NET_CLS_ACT |
| 278 | return exts->nr_actions; |
| 279 | #else |
| 280 | return false; |
| 281 | #endif |
| 282 | } |
| 283 | |
| 284 | /** |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 285 | * tcf_exts_exec - execute tc filter extensions |
| 286 | * @skb: socket buffer |
| 287 | * @exts: tc filter extensions handle |
| 288 | * @res: desired result |
| 289 | * |
| 290 | * Executes all configured extensions. Returns TC_ACT_OK on a normal execution, |
| 291 | * a negative number if the filter must be considered unmatched or |
| 292 | * a positive action code (TC_ACT_*) which must be returned to the |
| 293 | * underlying layer. |
| 294 | */ |
| 295 | static inline int |
| 296 | tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts, |
| 297 | struct tcf_result *res) |
| 298 | { |
| 299 | #ifdef CONFIG_NET_CLS_ACT |
| 300 | return tcf_action_exec(skb, exts->actions, exts->nr_actions, res); |
| 301 | #endif |
| 302 | return TC_ACT_OK; |
| 303 | } |
| 304 | |
| 305 | int tcf_exts_validate(struct net *net, struct tcf_proto *tp, |
| 306 | struct nlattr **tb, struct nlattr *rate_tlv, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 307 | struct tcf_exts *exts, bool ovr, bool rtnl_held, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 308 | struct netlink_ext_ack *extack); |
| 309 | void tcf_exts_destroy(struct tcf_exts *exts); |
| 310 | void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src); |
| 311 | int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts); |
| 312 | int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts); |
| 313 | |
| 314 | /** |
| 315 | * struct tcf_pkt_info - packet information |
| 316 | */ |
| 317 | struct tcf_pkt_info { |
| 318 | unsigned char * ptr; |
| 319 | int nexthdr; |
| 320 | }; |
| 321 | |
| 322 | #ifdef CONFIG_NET_EMATCH |
| 323 | |
| 324 | struct tcf_ematch_ops; |
| 325 | |
| 326 | /** |
| 327 | * struct tcf_ematch - extended match (ematch) |
| 328 | * |
| 329 | * @matchid: identifier to allow userspace to reidentify a match |
| 330 | * @flags: flags specifying attributes and the relation to other matches |
| 331 | * @ops: the operations lookup table of the corresponding ematch module |
| 332 | * @datalen: length of the ematch specific configuration data |
| 333 | * @data: ematch specific data |
| 334 | */ |
| 335 | struct tcf_ematch { |
| 336 | struct tcf_ematch_ops * ops; |
| 337 | unsigned long data; |
| 338 | unsigned int datalen; |
| 339 | u16 matchid; |
| 340 | u16 flags; |
| 341 | struct net *net; |
| 342 | }; |
| 343 | |
| 344 | static inline int tcf_em_is_container(struct tcf_ematch *em) |
| 345 | { |
| 346 | return !em->ops; |
| 347 | } |
| 348 | |
| 349 | static inline int tcf_em_is_simple(struct tcf_ematch *em) |
| 350 | { |
| 351 | return em->flags & TCF_EM_SIMPLE; |
| 352 | } |
| 353 | |
| 354 | static inline int tcf_em_is_inverted(struct tcf_ematch *em) |
| 355 | { |
| 356 | return em->flags & TCF_EM_INVERT; |
| 357 | } |
| 358 | |
| 359 | static inline int tcf_em_last_match(struct tcf_ematch *em) |
| 360 | { |
| 361 | return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END; |
| 362 | } |
| 363 | |
| 364 | static inline int tcf_em_early_end(struct tcf_ematch *em, int result) |
| 365 | { |
| 366 | if (tcf_em_last_match(em)) |
| 367 | return 1; |
| 368 | |
| 369 | if (result == 0 && em->flags & TCF_EM_REL_AND) |
| 370 | return 1; |
| 371 | |
| 372 | if (result != 0 && em->flags & TCF_EM_REL_OR) |
| 373 | return 1; |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * struct tcf_ematch_tree - ematch tree handle |
| 380 | * |
| 381 | * @hdr: ematch tree header supplied by userspace |
| 382 | * @matches: array of ematches |
| 383 | */ |
| 384 | struct tcf_ematch_tree { |
| 385 | struct tcf_ematch_tree_hdr hdr; |
| 386 | struct tcf_ematch * matches; |
| 387 | |
| 388 | }; |
| 389 | |
| 390 | /** |
| 391 | * struct tcf_ematch_ops - ematch module operations |
| 392 | * |
| 393 | * @kind: identifier (kind) of this ematch module |
| 394 | * @datalen: length of expected configuration data (optional) |
| 395 | * @change: called during validation (optional) |
| 396 | * @match: called during ematch tree evaluation, must return 1/0 |
| 397 | * @destroy: called during destroyage (optional) |
| 398 | * @dump: called during dumping process (optional) |
| 399 | * @owner: owner, must be set to THIS_MODULE |
| 400 | * @link: link to previous/next ematch module (internal use) |
| 401 | */ |
| 402 | struct tcf_ematch_ops { |
| 403 | int kind; |
| 404 | int datalen; |
| 405 | int (*change)(struct net *net, void *, |
| 406 | int, struct tcf_ematch *); |
| 407 | int (*match)(struct sk_buff *, struct tcf_ematch *, |
| 408 | struct tcf_pkt_info *); |
| 409 | void (*destroy)(struct tcf_ematch *); |
| 410 | int (*dump)(struct sk_buff *, struct tcf_ematch *); |
| 411 | struct module *owner; |
| 412 | struct list_head link; |
| 413 | }; |
| 414 | |
| 415 | int tcf_em_register(struct tcf_ematch_ops *); |
| 416 | void tcf_em_unregister(struct tcf_ematch_ops *); |
| 417 | int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *, |
| 418 | struct tcf_ematch_tree *); |
| 419 | void tcf_em_tree_destroy(struct tcf_ematch_tree *); |
| 420 | int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int); |
| 421 | int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *, |
| 422 | struct tcf_pkt_info *); |
| 423 | |
| 424 | /** |
| 425 | * tcf_em_tree_match - evaulate an ematch tree |
| 426 | * |
| 427 | * @skb: socket buffer of the packet in question |
| 428 | * @tree: ematch tree to be used for evaluation |
| 429 | * @info: packet information examined by classifier |
| 430 | * |
| 431 | * This function matches @skb against the ematch tree in @tree by going |
| 432 | * through all ematches respecting their logic relations returning |
| 433 | * as soon as the result is obvious. |
| 434 | * |
| 435 | * Returns 1 if the ematch tree as-one matches, no ematches are configured |
| 436 | * or ematch is not enabled in the kernel, otherwise 0 is returned. |
| 437 | */ |
| 438 | static inline int tcf_em_tree_match(struct sk_buff *skb, |
| 439 | struct tcf_ematch_tree *tree, |
| 440 | struct tcf_pkt_info *info) |
| 441 | { |
| 442 | if (tree->hdr.nmatches) |
| 443 | return __tcf_em_tree_match(skb, tree, info); |
| 444 | else |
| 445 | return 1; |
| 446 | } |
| 447 | |
| 448 | #define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind)) |
| 449 | |
| 450 | #else /* CONFIG_NET_EMATCH */ |
| 451 | |
| 452 | struct tcf_ematch_tree { |
| 453 | }; |
| 454 | |
| 455 | #define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0) |
| 456 | #define tcf_em_tree_destroy(t) do { (void)(t); } while(0) |
| 457 | #define tcf_em_tree_dump(skb, t, tlv) (0) |
| 458 | #define tcf_em_tree_match(skb, t, info) ((void)(info), 1) |
| 459 | |
| 460 | #endif /* CONFIG_NET_EMATCH */ |
| 461 | |
| 462 | static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer) |
| 463 | { |
| 464 | switch (layer) { |
| 465 | case TCF_LAYER_LINK: |
| 466 | return skb_mac_header(skb); |
| 467 | case TCF_LAYER_NETWORK: |
| 468 | return skb_network_header(skb); |
| 469 | case TCF_LAYER_TRANSPORT: |
| 470 | return skb_transport_header(skb); |
| 471 | } |
| 472 | |
| 473 | return NULL; |
| 474 | } |
| 475 | |
| 476 | static inline int tcf_valid_offset(const struct sk_buff *skb, |
| 477 | const unsigned char *ptr, const int len) |
| 478 | { |
| 479 | return likely((ptr + len) <= skb_tail_pointer(skb) && |
| 480 | ptr >= skb->head && |
| 481 | (ptr <= (ptr + len))); |
| 482 | } |
| 483 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 484 | static inline int |
| 485 | tcf_change_indev(struct net *net, struct nlattr *indev_tlv, |
| 486 | struct netlink_ext_ack *extack) |
| 487 | { |
| 488 | char indev[IFNAMSIZ]; |
| 489 | struct net_device *dev; |
| 490 | |
| 491 | if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ) { |
| 492 | NL_SET_ERR_MSG(extack, "Interface name too long"); |
| 493 | return -EINVAL; |
| 494 | } |
| 495 | dev = __dev_get_by_name(net, indev); |
| 496 | if (!dev) |
| 497 | return -ENODEV; |
| 498 | return dev->ifindex; |
| 499 | } |
| 500 | |
| 501 | static inline bool |
| 502 | tcf_match_indev(struct sk_buff *skb, int ifindex) |
| 503 | { |
| 504 | if (!ifindex) |
| 505 | return true; |
| 506 | if (!skb->skb_iif) |
| 507 | return false; |
| 508 | return ifindex == skb->skb_iif; |
| 509 | } |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 510 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 511 | int tc_setup_flow_action(struct flow_action *flow_action, |
| 512 | const struct tcf_exts *exts, bool rtnl_held); |
| 513 | void tc_cleanup_flow_action(struct flow_action *flow_action); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 514 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 515 | int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type, |
| 516 | void *type_data, bool err_stop, bool rtnl_held); |
| 517 | int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp, |
| 518 | enum tc_setup_type type, void *type_data, bool err_stop, |
| 519 | u32 *flags, unsigned int *in_hw_count, bool rtnl_held); |
| 520 | int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp, |
| 521 | enum tc_setup_type type, void *type_data, bool err_stop, |
| 522 | u32 *old_flags, unsigned int *old_in_hw_count, |
| 523 | u32 *new_flags, unsigned int *new_in_hw_count, |
| 524 | bool rtnl_held); |
| 525 | int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp, |
| 526 | enum tc_setup_type type, void *type_data, bool err_stop, |
| 527 | u32 *flags, unsigned int *in_hw_count, bool rtnl_held); |
| 528 | int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp, |
| 529 | bool add, flow_setup_cb_t *cb, |
| 530 | enum tc_setup_type type, void *type_data, |
| 531 | void *cb_priv, u32 *flags, unsigned int *in_hw_count); |
| 532 | unsigned int tcf_exts_num_actions(struct tcf_exts *exts); |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 533 | |
| 534 | struct tc_cls_u32_knode { |
| 535 | struct tcf_exts *exts; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 536 | struct tcf_result *res; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 537 | struct tc_u32_sel *sel; |
| 538 | u32 handle; |
| 539 | u32 val; |
| 540 | u32 mask; |
| 541 | u32 link_handle; |
| 542 | u8 fshift; |
| 543 | }; |
| 544 | |
| 545 | struct tc_cls_u32_hnode { |
| 546 | u32 handle; |
| 547 | u32 prio; |
| 548 | unsigned int divisor; |
| 549 | }; |
| 550 | |
| 551 | enum tc_clsu32_command { |
| 552 | TC_CLSU32_NEW_KNODE, |
| 553 | TC_CLSU32_REPLACE_KNODE, |
| 554 | TC_CLSU32_DELETE_KNODE, |
| 555 | TC_CLSU32_NEW_HNODE, |
| 556 | TC_CLSU32_REPLACE_HNODE, |
| 557 | TC_CLSU32_DELETE_HNODE, |
| 558 | }; |
| 559 | |
| 560 | struct tc_cls_u32_offload { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 561 | struct flow_cls_common_offload common; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 562 | /* knode values */ |
| 563 | enum tc_clsu32_command command; |
| 564 | union { |
| 565 | struct tc_cls_u32_knode knode; |
| 566 | struct tc_cls_u32_hnode hnode; |
| 567 | }; |
| 568 | }; |
| 569 | |
| 570 | static inline bool tc_can_offload(const struct net_device *dev) |
| 571 | { |
| 572 | return dev->features & NETIF_F_HW_TC; |
| 573 | } |
| 574 | |
| 575 | static inline bool tc_can_offload_extack(const struct net_device *dev, |
| 576 | struct netlink_ext_ack *extack) |
| 577 | { |
| 578 | bool can = tc_can_offload(dev); |
| 579 | |
| 580 | if (!can) |
| 581 | NL_SET_ERR_MSG(extack, "TC offload is disabled on net device"); |
| 582 | |
| 583 | return can; |
| 584 | } |
| 585 | |
| 586 | static inline bool |
| 587 | tc_cls_can_offload_and_chain0(const struct net_device *dev, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 588 | struct flow_cls_common_offload *common) |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 589 | { |
| 590 | if (!tc_can_offload_extack(dev, common->extack)) |
| 591 | return false; |
| 592 | if (common->chain_index) { |
| 593 | NL_SET_ERR_MSG(common->extack, |
| 594 | "Driver supports only offload of chain 0"); |
| 595 | return false; |
| 596 | } |
| 597 | return true; |
| 598 | } |
| 599 | |
| 600 | static inline bool tc_skip_hw(u32 flags) |
| 601 | { |
| 602 | return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false; |
| 603 | } |
| 604 | |
| 605 | static inline bool tc_skip_sw(u32 flags) |
| 606 | { |
| 607 | return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false; |
| 608 | } |
| 609 | |
| 610 | /* SKIP_HW and SKIP_SW are mutually exclusive flags. */ |
| 611 | static inline bool tc_flags_valid(u32 flags) |
| 612 | { |
| 613 | if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW | |
| 614 | TCA_CLS_FLAGS_VERBOSE)) |
| 615 | return false; |
| 616 | |
| 617 | flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW; |
| 618 | if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW))) |
| 619 | return false; |
| 620 | |
| 621 | return true; |
| 622 | } |
| 623 | |
| 624 | static inline bool tc_in_hw(u32 flags) |
| 625 | { |
| 626 | return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false; |
| 627 | } |
| 628 | |
| 629 | static inline void |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 630 | tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 631 | const struct tcf_proto *tp, u32 flags, |
| 632 | struct netlink_ext_ack *extack) |
| 633 | { |
| 634 | cls_common->chain_index = tp->chain->index; |
| 635 | cls_common->protocol = tp->protocol; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 636 | cls_common->prio = tp->prio >> 16; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 637 | if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE) |
| 638 | cls_common->extack = extack; |
| 639 | } |
| 640 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 641 | enum tc_matchall_command { |
| 642 | TC_CLSMATCHALL_REPLACE, |
| 643 | TC_CLSMATCHALL_DESTROY, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 644 | TC_CLSMATCHALL_STATS, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 645 | }; |
| 646 | |
| 647 | struct tc_cls_matchall_offload { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 648 | struct flow_cls_common_offload common; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 649 | enum tc_matchall_command command; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 650 | struct flow_rule *rule; |
| 651 | struct flow_stats stats; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 652 | unsigned long cookie; |
| 653 | }; |
| 654 | |
| 655 | enum tc_clsbpf_command { |
| 656 | TC_CLSBPF_OFFLOAD, |
| 657 | TC_CLSBPF_STATS, |
| 658 | }; |
| 659 | |
| 660 | struct tc_cls_bpf_offload { |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 661 | struct flow_cls_common_offload common; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 662 | enum tc_clsbpf_command command; |
| 663 | struct tcf_exts *exts; |
| 664 | struct bpf_prog *prog; |
| 665 | struct bpf_prog *oldprog; |
| 666 | const char *name; |
| 667 | bool exts_integrated; |
| 668 | }; |
| 669 | |
| 670 | struct tc_mqprio_qopt_offload { |
| 671 | /* struct tc_mqprio_qopt must always be the first element */ |
| 672 | struct tc_mqprio_qopt qopt; |
| 673 | u16 mode; |
| 674 | u16 shaper; |
| 675 | u32 flags; |
| 676 | u64 min_rate[TC_QOPT_MAX_QUEUE]; |
| 677 | u64 max_rate[TC_QOPT_MAX_QUEUE]; |
| 678 | }; |
| 679 | |
| 680 | /* This structure holds cookie structure that is passed from user |
| 681 | * to the kernel for actions and classifiers |
| 682 | */ |
| 683 | struct tc_cookie { |
| 684 | u8 *data; |
| 685 | u32 len; |
| 686 | struct rcu_head rcu; |
| 687 | }; |
| 688 | |
| 689 | struct tc_qopt_offload_stats { |
| 690 | struct gnet_stats_basic_packed *bstats; |
| 691 | struct gnet_stats_queue *qstats; |
| 692 | }; |
| 693 | |
| 694 | enum tc_mq_command { |
| 695 | TC_MQ_CREATE, |
| 696 | TC_MQ_DESTROY, |
| 697 | TC_MQ_STATS, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 698 | TC_MQ_GRAFT, |
| 699 | }; |
| 700 | |
| 701 | struct tc_mq_opt_offload_graft_params { |
| 702 | unsigned long queue; |
| 703 | u32 child_handle; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 704 | }; |
| 705 | |
| 706 | struct tc_mq_qopt_offload { |
| 707 | enum tc_mq_command command; |
| 708 | u32 handle; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 709 | union { |
| 710 | struct tc_qopt_offload_stats stats; |
| 711 | struct tc_mq_opt_offload_graft_params graft_params; |
| 712 | }; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 713 | }; |
| 714 | |
| 715 | enum tc_red_command { |
| 716 | TC_RED_REPLACE, |
| 717 | TC_RED_DESTROY, |
| 718 | TC_RED_STATS, |
| 719 | TC_RED_XSTATS, |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 720 | TC_RED_GRAFT, |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 721 | }; |
| 722 | |
| 723 | struct tc_red_qopt_offload_params { |
| 724 | u32 min; |
| 725 | u32 max; |
| 726 | u32 probability; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 727 | u32 limit; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 728 | bool is_ecn; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 729 | bool is_harddrop; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 730 | struct gnet_stats_queue *qstats; |
| 731 | }; |
| 732 | |
| 733 | struct tc_red_qopt_offload { |
| 734 | enum tc_red_command command; |
| 735 | u32 handle; |
| 736 | u32 parent; |
| 737 | union { |
| 738 | struct tc_red_qopt_offload_params set; |
| 739 | struct tc_qopt_offload_stats stats; |
| 740 | struct red_stats *xstats; |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 741 | u32 child_handle; |
| 742 | }; |
| 743 | }; |
| 744 | |
| 745 | enum tc_gred_command { |
| 746 | TC_GRED_REPLACE, |
| 747 | TC_GRED_DESTROY, |
| 748 | TC_GRED_STATS, |
| 749 | }; |
| 750 | |
| 751 | struct tc_gred_vq_qopt_offload_params { |
| 752 | bool present; |
| 753 | u32 limit; |
| 754 | u32 prio; |
| 755 | u32 min; |
| 756 | u32 max; |
| 757 | bool is_ecn; |
| 758 | bool is_harddrop; |
| 759 | u32 probability; |
| 760 | /* Only need backlog, see struct tc_prio_qopt_offload_params */ |
| 761 | u32 *backlog; |
| 762 | }; |
| 763 | |
| 764 | struct tc_gred_qopt_offload_params { |
| 765 | bool grio_on; |
| 766 | bool wred_on; |
| 767 | unsigned int dp_cnt; |
| 768 | unsigned int dp_def; |
| 769 | struct gnet_stats_queue *qstats; |
| 770 | struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; |
| 771 | }; |
| 772 | |
| 773 | struct tc_gred_qopt_offload_stats { |
| 774 | struct gnet_stats_basic_packed bstats[MAX_DPs]; |
| 775 | struct gnet_stats_queue qstats[MAX_DPs]; |
| 776 | struct red_stats *xstats[MAX_DPs]; |
| 777 | }; |
| 778 | |
| 779 | struct tc_gred_qopt_offload { |
| 780 | enum tc_gred_command command; |
| 781 | u32 handle; |
| 782 | u32 parent; |
| 783 | union { |
| 784 | struct tc_gred_qopt_offload_params set; |
| 785 | struct tc_gred_qopt_offload_stats stats; |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 786 | }; |
| 787 | }; |
| 788 | |
| 789 | enum tc_prio_command { |
| 790 | TC_PRIO_REPLACE, |
| 791 | TC_PRIO_DESTROY, |
| 792 | TC_PRIO_STATS, |
| 793 | TC_PRIO_GRAFT, |
| 794 | }; |
| 795 | |
| 796 | struct tc_prio_qopt_offload_params { |
| 797 | int bands; |
| 798 | u8 priomap[TC_PRIO_MAX + 1]; |
| 799 | /* In case that a prio qdisc is offloaded and now is changed to a |
| 800 | * non-offloadedable config, it needs to update the backlog & qlen |
| 801 | * values to negate the HW backlog & qlen values (and only them). |
| 802 | */ |
| 803 | struct gnet_stats_queue *qstats; |
| 804 | }; |
| 805 | |
| 806 | struct tc_prio_qopt_offload_graft_params { |
| 807 | u8 band; |
| 808 | u32 child_handle; |
| 809 | }; |
| 810 | |
| 811 | struct tc_prio_qopt_offload { |
| 812 | enum tc_prio_command command; |
| 813 | u32 handle; |
| 814 | u32 parent; |
| 815 | union { |
| 816 | struct tc_prio_qopt_offload_params replace_params; |
| 817 | struct tc_qopt_offload_stats stats; |
| 818 | struct tc_prio_qopt_offload_graft_params graft_params; |
| 819 | }; |
| 820 | }; |
| 821 | |
David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 822 | enum tc_root_command { |
| 823 | TC_ROOT_GRAFT, |
| 824 | }; |
| 825 | |
| 826 | struct tc_root_qopt_offload { |
| 827 | enum tc_root_command command; |
| 828 | u32 handle; |
| 829 | bool ingress; |
| 830 | }; |
| 831 | |
Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 832 | #endif |