1 #ifndef _NET_FLOW_OFFLOAD_H 2 #define _NET_FLOW_OFFLOAD_H 3 4 #include <linux/kernel.h> 5 #include <linux/list.h> 6 #include <net/flow_dissector.h> 7 #include <linux/rhashtable.h> 8 9 struct flow_match { 10 struct flow_dissector *dissector; 11 void *mask; 12 void *key; 13 }; 14 15 struct flow_match_meta { 16 struct flow_dissector_key_meta *key, *mask; 17 }; 18 19 struct flow_match_basic { 20 struct flow_dissector_key_basic *key, *mask; 21 }; 22 23 struct flow_match_control { 24 struct flow_dissector_key_control *key, *mask; 25 }; 26 27 struct flow_match_eth_addrs { 28 struct flow_dissector_key_eth_addrs *key, *mask; 29 }; 30 31 struct flow_match_vlan { 32 struct flow_dissector_key_vlan *key, *mask; 33 }; 34 35 struct flow_match_ipv4_addrs { 36 struct flow_dissector_key_ipv4_addrs *key, *mask; 37 }; 38 39 struct flow_match_ipv6_addrs { 40 struct flow_dissector_key_ipv6_addrs *key, *mask; 41 }; 42 43 struct flow_match_ip { 44 struct flow_dissector_key_ip *key, *mask; 45 }; 46 47 struct flow_match_ports { 48 struct flow_dissector_key_ports *key, *mask; 49 }; 50 51 struct flow_match_icmp { 52 struct flow_dissector_key_icmp *key, *mask; 53 }; 54 55 struct flow_match_tcp { 56 struct flow_dissector_key_tcp *key, *mask; 57 }; 58 59 struct flow_match_mpls { 60 struct flow_dissector_key_mpls *key, *mask; 61 }; 62 63 struct flow_match_enc_keyid { 64 struct flow_dissector_key_keyid *key, *mask; 65 }; 66 67 struct flow_match_enc_opts { 68 struct flow_dissector_key_enc_opts *key, *mask; 69 }; 70 71 struct flow_rule; 72 73 void flow_rule_match_meta(const struct flow_rule *rule, 74 struct flow_match_meta *out); 75 void flow_rule_match_basic(const struct flow_rule *rule, 76 struct flow_match_basic *out); 77 void flow_rule_match_control(const struct flow_rule *rule, 78 struct flow_match_control *out); 79 void flow_rule_match_eth_addrs(const struct flow_rule *rule, 80 struct flow_match_eth_addrs *out); 81 void flow_rule_match_vlan(const struct flow_rule *rule, 82 struct flow_match_vlan *out); 83 void flow_rule_match_cvlan(const struct flow_rule *rule, 84 struct flow_match_vlan *out); 85 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule, 86 struct flow_match_ipv4_addrs *out); 87 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule, 88 struct flow_match_ipv6_addrs *out); 89 void flow_rule_match_ip(const struct flow_rule *rule, 90 struct flow_match_ip *out); 91 void flow_rule_match_ports(const struct flow_rule *rule, 92 struct flow_match_ports *out); 93 void flow_rule_match_tcp(const struct flow_rule *rule, 94 struct flow_match_tcp *out); 95 void flow_rule_match_icmp(const struct flow_rule *rule, 96 struct flow_match_icmp *out); 97 void flow_rule_match_mpls(const struct flow_rule *rule, 98 struct flow_match_mpls *out); 99 void flow_rule_match_enc_control(const struct flow_rule *rule, 100 struct flow_match_control *out); 101 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule, 102 struct flow_match_ipv4_addrs *out); 103 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule, 104 struct flow_match_ipv6_addrs *out); 105 void flow_rule_match_enc_ip(const struct flow_rule *rule, 106 struct flow_match_ip *out); 107 void flow_rule_match_enc_ports(const struct flow_rule *rule, 108 struct flow_match_ports *out); 109 void flow_rule_match_enc_keyid(const struct flow_rule *rule, 110 struct flow_match_enc_keyid *out); 111 void flow_rule_match_enc_opts(const struct flow_rule *rule, 112 struct flow_match_enc_opts *out); 113 114 enum flow_action_id { 115 FLOW_ACTION_ACCEPT = 0, 116 FLOW_ACTION_DROP, 117 FLOW_ACTION_TRAP, 118 FLOW_ACTION_GOTO, 119 FLOW_ACTION_REDIRECT, 120 FLOW_ACTION_MIRRED, 121 FLOW_ACTION_REDIRECT_INGRESS, 122 FLOW_ACTION_MIRRED_INGRESS, 123 FLOW_ACTION_VLAN_PUSH, 124 FLOW_ACTION_VLAN_POP, 125 FLOW_ACTION_VLAN_MANGLE, 126 FLOW_ACTION_TUNNEL_ENCAP, 127 FLOW_ACTION_TUNNEL_DECAP, 128 FLOW_ACTION_MANGLE, 129 FLOW_ACTION_ADD, 130 FLOW_ACTION_CSUM, 131 FLOW_ACTION_MARK, 132 FLOW_ACTION_PTYPE, 133 FLOW_ACTION_WAKE, 134 FLOW_ACTION_QUEUE, 135 FLOW_ACTION_SAMPLE, 136 FLOW_ACTION_POLICE, 137 FLOW_ACTION_CT, 138 FLOW_ACTION_MPLS_PUSH, 139 FLOW_ACTION_MPLS_POP, 140 FLOW_ACTION_MPLS_MANGLE, 141 NUM_FLOW_ACTIONS, 142 }; 143 144 /* This is mirroring enum pedit_header_type definition for easy mapping between 145 * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to 146 * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver. 147 */ 148 enum flow_action_mangle_base { 149 FLOW_ACT_MANGLE_UNSPEC = 0, 150 FLOW_ACT_MANGLE_HDR_TYPE_ETH, 151 FLOW_ACT_MANGLE_HDR_TYPE_IP4, 152 FLOW_ACT_MANGLE_HDR_TYPE_IP6, 153 FLOW_ACT_MANGLE_HDR_TYPE_TCP, 154 FLOW_ACT_MANGLE_HDR_TYPE_UDP, 155 }; 156 157 struct flow_action_entry { 158 enum flow_action_id id; 159 union { 160 u32 chain_index; /* FLOW_ACTION_GOTO */ 161 struct net_device *dev; /* FLOW_ACTION_REDIRECT */ 162 struct { /* FLOW_ACTION_VLAN */ 163 u16 vid; 164 __be16 proto; 165 u8 prio; 166 } vlan; 167 struct { /* FLOW_ACTION_PACKET_EDIT */ 168 enum flow_action_mangle_base htype; 169 u32 offset; 170 u32 mask; 171 u32 val; 172 } mangle; 173 const struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */ 174 u32 csum_flags; /* FLOW_ACTION_CSUM */ 175 u32 mark; /* FLOW_ACTION_MARK */ 176 u16 ptype; /* FLOW_ACTION_PTYPE */ 177 struct { /* FLOW_ACTION_QUEUE */ 178 u32 ctx; 179 u32 index; 180 u8 vf; 181 } queue; 182 struct { /* FLOW_ACTION_SAMPLE */ 183 struct psample_group *psample_group; 184 u32 rate; 185 u32 trunc_size; 186 bool truncate; 187 } sample; 188 struct { /* FLOW_ACTION_POLICE */ 189 s64 burst; 190 u64 rate_bytes_ps; 191 } police; 192 struct { /* FLOW_ACTION_CT */ 193 int action; 194 u16 zone; 195 } ct; 196 struct { /* FLOW_ACTION_MPLS_PUSH */ 197 u32 label; 198 __be16 proto; 199 u8 tc; 200 u8 bos; 201 u8 ttl; 202 } mpls_push; 203 struct { /* FLOW_ACTION_MPLS_POP */ 204 __be16 proto; 205 } mpls_pop; 206 struct { /* FLOW_ACTION_MPLS_MANGLE */ 207 u32 label; 208 u8 tc; 209 u8 bos; 210 u8 ttl; 211 } mpls_mangle; 212 }; 213 }; 214 215 struct flow_action { 216 unsigned int num_entries; 217 struct flow_action_entry entries[0]; 218 }; 219 220 static inline bool flow_action_has_entries(const struct flow_action *action) 221 { 222 return action->num_entries; 223 } 224 225 /** 226 * flow_action_has_one_action() - check if exactly one action is present 227 * @action: tc filter flow offload action 228 * 229 * Returns true if exactly one action is present. 230 */ 231 static inline bool flow_offload_has_one_action(const struct flow_action *action) 232 { 233 return action->num_entries == 1; 234 } 235 236 #define flow_action_for_each(__i, __act, __actions) \ 237 for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i]) 238 239 struct flow_rule { 240 struct flow_match match; 241 struct flow_action action; 242 }; 243 244 struct flow_rule *flow_rule_alloc(unsigned int num_actions); 245 246 static inline bool flow_rule_match_key(const struct flow_rule *rule, 247 enum flow_dissector_key_id key) 248 { 249 return dissector_uses_key(rule->match.dissector, key); 250 } 251 252 struct flow_stats { 253 u64 pkts; 254 u64 bytes; 255 u64 lastused; 256 }; 257 258 static inline void flow_stats_update(struct flow_stats *flow_stats, 259 u64 bytes, u64 pkts, u64 lastused) 260 { 261 flow_stats->pkts += pkts; 262 flow_stats->bytes += bytes; 263 flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused); 264 } 265 266 enum flow_block_command { 267 FLOW_BLOCK_BIND, 268 FLOW_BLOCK_UNBIND, 269 }; 270 271 enum flow_block_binder_type { 272 FLOW_BLOCK_BINDER_TYPE_UNSPEC, 273 FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS, 274 FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS, 275 }; 276 277 struct flow_block { 278 struct list_head cb_list; 279 }; 280 281 struct netlink_ext_ack; 282 283 struct flow_block_offload { 284 enum flow_block_command command; 285 enum flow_block_binder_type binder_type; 286 bool block_shared; 287 bool unlocked_driver_cb; 288 struct net *net; 289 struct flow_block *block; 290 struct list_head cb_list; 291 struct list_head *driver_block_list; 292 struct netlink_ext_ack *extack; 293 }; 294 295 enum tc_setup_type; 296 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data, 297 void *cb_priv); 298 299 struct flow_block_cb { 300 struct list_head driver_list; 301 struct list_head list; 302 flow_setup_cb_t *cb; 303 void *cb_ident; 304 void *cb_priv; 305 void (*release)(void *cb_priv); 306 unsigned int refcnt; 307 }; 308 309 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb, 310 void *cb_ident, void *cb_priv, 311 void (*release)(void *cb_priv)); 312 void flow_block_cb_free(struct flow_block_cb *block_cb); 313 314 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block, 315 flow_setup_cb_t *cb, void *cb_ident); 316 317 void *flow_block_cb_priv(struct flow_block_cb *block_cb); 318 void flow_block_cb_incref(struct flow_block_cb *block_cb); 319 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb); 320 321 static inline void flow_block_cb_add(struct flow_block_cb *block_cb, 322 struct flow_block_offload *offload) 323 { 324 list_add_tail(&block_cb->list, &offload->cb_list); 325 } 326 327 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb, 328 struct flow_block_offload *offload) 329 { 330 list_move(&block_cb->list, &offload->cb_list); 331 } 332 333 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident, 334 struct list_head *driver_block_list); 335 336 int flow_block_cb_setup_simple(struct flow_block_offload *f, 337 struct list_head *driver_list, 338 flow_setup_cb_t *cb, 339 void *cb_ident, void *cb_priv, bool ingress_only); 340 341 enum flow_cls_command { 342 FLOW_CLS_REPLACE, 343 FLOW_CLS_DESTROY, 344 FLOW_CLS_STATS, 345 FLOW_CLS_TMPLT_CREATE, 346 FLOW_CLS_TMPLT_DESTROY, 347 }; 348 349 struct flow_cls_common_offload { 350 u32 chain_index; 351 __be16 protocol; 352 u32 prio; 353 struct netlink_ext_ack *extack; 354 }; 355 356 struct flow_cls_offload { 357 struct flow_cls_common_offload common; 358 enum flow_cls_command command; 359 unsigned long cookie; 360 struct flow_rule *rule; 361 struct flow_stats stats; 362 u32 classid; 363 }; 364 365 static inline struct flow_rule * 366 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd) 367 { 368 return flow_cmd->rule; 369 } 370 371 static inline void flow_block_init(struct flow_block *flow_block) 372 { 373 INIT_LIST_HEAD(&flow_block->cb_list); 374 } 375 376 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv, 377 enum tc_setup_type type, void *type_data); 378 379 typedef void flow_indr_block_ing_cmd_t(struct net_device *dev, 380 flow_indr_block_bind_cb_t *cb, 381 void *cb_priv, 382 enum flow_block_command command); 383 384 struct flow_indr_block_ing_entry { 385 flow_indr_block_ing_cmd_t *cb; 386 struct list_head list; 387 }; 388 389 void flow_indr_add_block_ing_cb(struct flow_indr_block_ing_entry *entry); 390 391 void flow_indr_del_block_ing_cb(struct flow_indr_block_ing_entry *entry); 392 393 int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv, 394 flow_indr_block_bind_cb_t *cb, 395 void *cb_ident); 396 397 void __flow_indr_block_cb_unregister(struct net_device *dev, 398 flow_indr_block_bind_cb_t *cb, 399 void *cb_ident); 400 401 int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv, 402 flow_indr_block_bind_cb_t *cb, void *cb_ident); 403 404 void flow_indr_block_cb_unregister(struct net_device *dev, 405 flow_indr_block_bind_cb_t *cb, 406 void *cb_ident); 407 408 void flow_indr_block_call(struct net_device *dev, 409 struct flow_block_offload *bo, 410 enum flow_block_command command); 411 412 #endif /* _NET_FLOW_OFFLOAD_H */ 413