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 }; 142 143 /* This is mirroring enum pedit_header_type definition for easy mapping between 144 * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to 145 * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver. 146 */ 147 enum flow_action_mangle_base { 148 FLOW_ACT_MANGLE_UNSPEC = 0, 149 FLOW_ACT_MANGLE_HDR_TYPE_ETH, 150 FLOW_ACT_MANGLE_HDR_TYPE_IP4, 151 FLOW_ACT_MANGLE_HDR_TYPE_IP6, 152 FLOW_ACT_MANGLE_HDR_TYPE_TCP, 153 FLOW_ACT_MANGLE_HDR_TYPE_UDP, 154 }; 155 156 struct flow_action_entry { 157 enum flow_action_id id; 158 union { 159 u32 chain_index; /* FLOW_ACTION_GOTO */ 160 struct net_device *dev; /* FLOW_ACTION_REDIRECT */ 161 struct { /* FLOW_ACTION_VLAN */ 162 u16 vid; 163 __be16 proto; 164 u8 prio; 165 } vlan; 166 struct { /* FLOW_ACTION_PACKET_EDIT */ 167 enum flow_action_mangle_base htype; 168 u32 offset; 169 u32 mask; 170 u32 val; 171 } mangle; 172 const struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */ 173 u32 csum_flags; /* FLOW_ACTION_CSUM */ 174 u32 mark; /* FLOW_ACTION_MARK */ 175 u16 ptype; /* FLOW_ACTION_PTYPE */ 176 struct { /* FLOW_ACTION_QUEUE */ 177 u32 ctx; 178 u32 index; 179 u8 vf; 180 } queue; 181 struct { /* FLOW_ACTION_SAMPLE */ 182 struct psample_group *psample_group; 183 u32 rate; 184 u32 trunc_size; 185 bool truncate; 186 } sample; 187 struct { /* FLOW_ACTION_POLICE */ 188 s64 burst; 189 u64 rate_bytes_ps; 190 } police; 191 struct { /* FLOW_ACTION_CT */ 192 int action; 193 u16 zone; 194 } ct; 195 struct { /* FLOW_ACTION_MPLS_PUSH */ 196 u32 label; 197 __be16 proto; 198 u8 tc; 199 u8 bos; 200 u8 ttl; 201 } mpls_push; 202 struct { /* FLOW_ACTION_MPLS_POP */ 203 __be16 proto; 204 } mpls_pop; 205 struct { /* FLOW_ACTION_MPLS_MANGLE */ 206 u32 label; 207 u8 tc; 208 u8 bos; 209 u8 ttl; 210 } mpls_mangle; 211 }; 212 }; 213 214 struct flow_action { 215 unsigned int num_entries; 216 struct flow_action_entry entries[0]; 217 }; 218 219 static inline bool flow_action_has_entries(const struct flow_action *action) 220 { 221 return action->num_entries; 222 } 223 224 /** 225 * flow_action_has_one_action() - check if exactly one action is present 226 * @action: tc filter flow offload action 227 * 228 * Returns true if exactly one action is present. 229 */ 230 static inline bool flow_offload_has_one_action(const struct flow_action *action) 231 { 232 return action->num_entries == 1; 233 } 234 235 #define flow_action_for_each(__i, __act, __actions) \ 236 for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i]) 237 238 struct flow_rule { 239 struct flow_match match; 240 struct flow_action action; 241 }; 242 243 struct flow_rule *flow_rule_alloc(unsigned int num_actions); 244 245 static inline bool flow_rule_match_key(const struct flow_rule *rule, 246 enum flow_dissector_key_id key) 247 { 248 return dissector_uses_key(rule->match.dissector, key); 249 } 250 251 struct flow_stats { 252 u64 pkts; 253 u64 bytes; 254 u64 lastused; 255 }; 256 257 static inline void flow_stats_update(struct flow_stats *flow_stats, 258 u64 bytes, u64 pkts, u64 lastused) 259 { 260 flow_stats->pkts += pkts; 261 flow_stats->bytes += bytes; 262 flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused); 263 } 264 265 enum flow_block_command { 266 FLOW_BLOCK_BIND, 267 FLOW_BLOCK_UNBIND, 268 }; 269 270 enum flow_block_binder_type { 271 FLOW_BLOCK_BINDER_TYPE_UNSPEC, 272 FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS, 273 FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS, 274 }; 275 276 struct flow_block { 277 struct list_head cb_list; 278 }; 279 280 struct netlink_ext_ack; 281 282 struct flow_block_offload { 283 enum flow_block_command command; 284 enum flow_block_binder_type binder_type; 285 bool block_shared; 286 struct net *net; 287 struct flow_block *block; 288 struct list_head cb_list; 289 struct list_head *driver_block_list; 290 struct netlink_ext_ack *extack; 291 }; 292 293 enum tc_setup_type; 294 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data, 295 void *cb_priv); 296 297 struct flow_block_cb { 298 struct list_head driver_list; 299 struct list_head list; 300 flow_setup_cb_t *cb; 301 void *cb_ident; 302 void *cb_priv; 303 void (*release)(void *cb_priv); 304 unsigned int refcnt; 305 }; 306 307 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb, 308 void *cb_ident, void *cb_priv, 309 void (*release)(void *cb_priv)); 310 void flow_block_cb_free(struct flow_block_cb *block_cb); 311 312 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block, 313 flow_setup_cb_t *cb, void *cb_ident); 314 315 void *flow_block_cb_priv(struct flow_block_cb *block_cb); 316 void flow_block_cb_incref(struct flow_block_cb *block_cb); 317 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb); 318 319 static inline void flow_block_cb_add(struct flow_block_cb *block_cb, 320 struct flow_block_offload *offload) 321 { 322 list_add_tail(&block_cb->list, &offload->cb_list); 323 } 324 325 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb, 326 struct flow_block_offload *offload) 327 { 328 list_move(&block_cb->list, &offload->cb_list); 329 } 330 331 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident, 332 struct list_head *driver_block_list); 333 334 int flow_block_cb_setup_simple(struct flow_block_offload *f, 335 struct list_head *driver_list, 336 flow_setup_cb_t *cb, 337 void *cb_ident, void *cb_priv, bool ingress_only); 338 339 enum flow_cls_command { 340 FLOW_CLS_REPLACE, 341 FLOW_CLS_DESTROY, 342 FLOW_CLS_STATS, 343 FLOW_CLS_TMPLT_CREATE, 344 FLOW_CLS_TMPLT_DESTROY, 345 }; 346 347 struct flow_cls_common_offload { 348 u32 chain_index; 349 __be16 protocol; 350 u32 prio; 351 struct netlink_ext_ack *extack; 352 }; 353 354 struct flow_cls_offload { 355 struct flow_cls_common_offload common; 356 enum flow_cls_command command; 357 unsigned long cookie; 358 struct flow_rule *rule; 359 struct flow_stats stats; 360 u32 classid; 361 }; 362 363 static inline struct flow_rule * 364 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd) 365 { 366 return flow_cmd->rule; 367 } 368 369 static inline void flow_block_init(struct flow_block *flow_block) 370 { 371 INIT_LIST_HEAD(&flow_block->cb_list); 372 } 373 374 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv, 375 enum tc_setup_type type, void *type_data); 376 377 typedef void flow_indr_block_ing_cmd_t(struct net_device *dev, 378 flow_indr_block_bind_cb_t *cb, 379 void *cb_priv, 380 enum flow_block_command command); 381 382 struct flow_indr_block_ing_entry { 383 flow_indr_block_ing_cmd_t *cb; 384 struct list_head list; 385 }; 386 387 void flow_indr_add_block_ing_cb(struct flow_indr_block_ing_entry *entry); 388 389 void flow_indr_del_block_ing_cb(struct flow_indr_block_ing_entry *entry); 390 391 int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv, 392 flow_indr_block_bind_cb_t *cb, 393 void *cb_ident); 394 395 void __flow_indr_block_cb_unregister(struct net_device *dev, 396 flow_indr_block_bind_cb_t *cb, 397 void *cb_ident); 398 399 int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv, 400 flow_indr_block_bind_cb_t *cb, void *cb_ident); 401 402 void flow_indr_block_cb_unregister(struct net_device *dev, 403 flow_indr_block_bind_cb_t *cb, 404 void *cb_ident); 405 406 void flow_indr_block_call(struct net_device *dev, 407 struct flow_block_offload *bo, 408 enum flow_block_command command); 409 410 #endif /* _NET_FLOW_OFFLOAD_H */ 411