1 /* 2 * net/sched/cls_flower.c Flower classifier 3 * 4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/rhashtable.h> 16 #include <linux/workqueue.h> 17 18 #include <linux/if_ether.h> 19 #include <linux/in6.h> 20 #include <linux/ip.h> 21 #include <linux/mpls.h> 22 23 #include <net/sch_generic.h> 24 #include <net/pkt_cls.h> 25 #include <net/ip.h> 26 #include <net/flow_dissector.h> 27 #include <net/geneve.h> 28 29 #include <net/dst.h> 30 #include <net/dst_metadata.h> 31 32 struct fl_flow_key { 33 int indev_ifindex; 34 struct flow_dissector_key_control control; 35 struct flow_dissector_key_control enc_control; 36 struct flow_dissector_key_basic basic; 37 struct flow_dissector_key_eth_addrs eth; 38 struct flow_dissector_key_vlan vlan; 39 struct flow_dissector_key_vlan cvlan; 40 union { 41 struct flow_dissector_key_ipv4_addrs ipv4; 42 struct flow_dissector_key_ipv6_addrs ipv6; 43 }; 44 struct flow_dissector_key_ports tp; 45 struct flow_dissector_key_icmp icmp; 46 struct flow_dissector_key_arp arp; 47 struct flow_dissector_key_keyid enc_key_id; 48 union { 49 struct flow_dissector_key_ipv4_addrs enc_ipv4; 50 struct flow_dissector_key_ipv6_addrs enc_ipv6; 51 }; 52 struct flow_dissector_key_ports enc_tp; 53 struct flow_dissector_key_mpls mpls; 54 struct flow_dissector_key_tcp tcp; 55 struct flow_dissector_key_ip ip; 56 struct flow_dissector_key_ip enc_ip; 57 struct flow_dissector_key_enc_opts enc_opts; 58 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 59 60 struct fl_flow_mask_range { 61 unsigned short int start; 62 unsigned short int end; 63 }; 64 65 struct fl_flow_mask { 66 struct fl_flow_key key; 67 struct fl_flow_mask_range range; 68 struct rhash_head ht_node; 69 struct rhashtable ht; 70 struct rhashtable_params filter_ht_params; 71 struct flow_dissector dissector; 72 struct list_head filters; 73 struct rcu_work rwork; 74 struct list_head list; 75 }; 76 77 struct fl_flow_tmplt { 78 struct fl_flow_key dummy_key; 79 struct fl_flow_key mask; 80 struct flow_dissector dissector; 81 struct tcf_chain *chain; 82 }; 83 84 struct cls_fl_head { 85 struct rhashtable ht; 86 struct list_head masks; 87 struct rcu_work rwork; 88 struct idr handle_idr; 89 }; 90 91 struct cls_fl_filter { 92 struct fl_flow_mask *mask; 93 struct rhash_head ht_node; 94 struct fl_flow_key mkey; 95 struct tcf_exts exts; 96 struct tcf_result res; 97 struct fl_flow_key key; 98 struct list_head list; 99 u32 handle; 100 u32 flags; 101 u32 in_hw_count; 102 struct rcu_work rwork; 103 struct net_device *hw_dev; 104 }; 105 106 static const struct rhashtable_params mask_ht_params = { 107 .key_offset = offsetof(struct fl_flow_mask, key), 108 .key_len = sizeof(struct fl_flow_key), 109 .head_offset = offsetof(struct fl_flow_mask, ht_node), 110 .automatic_shrinking = true, 111 }; 112 113 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 114 { 115 return mask->range.end - mask->range.start; 116 } 117 118 static void fl_mask_update_range(struct fl_flow_mask *mask) 119 { 120 const u8 *bytes = (const u8 *) &mask->key; 121 size_t size = sizeof(mask->key); 122 size_t i, first = 0, last; 123 124 for (i = 0; i < size; i++) { 125 if (bytes[i]) { 126 first = i; 127 break; 128 } 129 } 130 last = first; 131 for (i = size - 1; i != first; i--) { 132 if (bytes[i]) { 133 last = i; 134 break; 135 } 136 } 137 mask->range.start = rounddown(first, sizeof(long)); 138 mask->range.end = roundup(last + 1, sizeof(long)); 139 } 140 141 static void *fl_key_get_start(struct fl_flow_key *key, 142 const struct fl_flow_mask *mask) 143 { 144 return (u8 *) key + mask->range.start; 145 } 146 147 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 148 struct fl_flow_mask *mask) 149 { 150 const long *lkey = fl_key_get_start(key, mask); 151 const long *lmask = fl_key_get_start(&mask->key, mask); 152 long *lmkey = fl_key_get_start(mkey, mask); 153 int i; 154 155 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 156 *lmkey++ = *lkey++ & *lmask++; 157 } 158 159 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 160 struct fl_flow_mask *mask) 161 { 162 const long *lmask = fl_key_get_start(&mask->key, mask); 163 const long *ltmplt; 164 int i; 165 166 if (!tmplt) 167 return true; 168 ltmplt = fl_key_get_start(&tmplt->mask, mask); 169 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 170 if (~*ltmplt++ & *lmask++) 171 return false; 172 } 173 return true; 174 } 175 176 static void fl_clear_masked_range(struct fl_flow_key *key, 177 struct fl_flow_mask *mask) 178 { 179 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 180 } 181 182 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask, 183 struct fl_flow_key *mkey) 184 { 185 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 186 mask->filter_ht_params); 187 } 188 189 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 190 struct tcf_result *res) 191 { 192 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 193 struct cls_fl_filter *f; 194 struct fl_flow_mask *mask; 195 struct fl_flow_key skb_key; 196 struct fl_flow_key skb_mkey; 197 198 list_for_each_entry_rcu(mask, &head->masks, list) { 199 fl_clear_masked_range(&skb_key, mask); 200 201 skb_key.indev_ifindex = skb->skb_iif; 202 /* skb_flow_dissect() does not set n_proto in case an unknown 203 * protocol, so do it rather here. 204 */ 205 skb_key.basic.n_proto = skb->protocol; 206 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 207 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 208 209 fl_set_masked_key(&skb_mkey, &skb_key, mask); 210 211 f = fl_lookup(mask, &skb_mkey); 212 if (f && !tc_skip_sw(f->flags)) { 213 *res = f->res; 214 return tcf_exts_exec(skb, &f->exts, res); 215 } 216 } 217 return -1; 218 } 219 220 static int fl_init(struct tcf_proto *tp) 221 { 222 struct cls_fl_head *head; 223 224 head = kzalloc(sizeof(*head), GFP_KERNEL); 225 if (!head) 226 return -ENOBUFS; 227 228 INIT_LIST_HEAD_RCU(&head->masks); 229 rcu_assign_pointer(tp->root, head); 230 idr_init(&head->handle_idr); 231 232 return rhashtable_init(&head->ht, &mask_ht_params); 233 } 234 235 static void fl_mask_free(struct fl_flow_mask *mask) 236 { 237 rhashtable_destroy(&mask->ht); 238 kfree(mask); 239 } 240 241 static void fl_mask_free_work(struct work_struct *work) 242 { 243 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 244 struct fl_flow_mask, rwork); 245 246 fl_mask_free(mask); 247 } 248 249 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask, 250 bool async) 251 { 252 if (!list_empty(&mask->filters)) 253 return false; 254 255 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 256 list_del_rcu(&mask->list); 257 if (async) 258 tcf_queue_work(&mask->rwork, fl_mask_free_work); 259 else 260 fl_mask_free(mask); 261 262 return true; 263 } 264 265 static void __fl_destroy_filter(struct cls_fl_filter *f) 266 { 267 tcf_exts_destroy(&f->exts); 268 tcf_exts_put_net(&f->exts); 269 kfree(f); 270 } 271 272 static void fl_destroy_filter_work(struct work_struct *work) 273 { 274 struct cls_fl_filter *f = container_of(to_rcu_work(work), 275 struct cls_fl_filter, rwork); 276 277 rtnl_lock(); 278 __fl_destroy_filter(f); 279 rtnl_unlock(); 280 } 281 282 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 283 struct netlink_ext_ack *extack) 284 { 285 struct tc_cls_flower_offload cls_flower = {}; 286 struct tcf_block *block = tp->chain->block; 287 288 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 289 cls_flower.command = TC_CLSFLOWER_DESTROY; 290 cls_flower.cookie = (unsigned long) f; 291 292 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 293 &cls_flower, false); 294 tcf_block_offload_dec(block, &f->flags); 295 } 296 297 static int fl_hw_replace_filter(struct tcf_proto *tp, 298 struct cls_fl_filter *f, 299 struct netlink_ext_ack *extack) 300 { 301 struct tc_cls_flower_offload cls_flower = {}; 302 struct tcf_block *block = tp->chain->block; 303 bool skip_sw = tc_skip_sw(f->flags); 304 int err; 305 306 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 307 cls_flower.command = TC_CLSFLOWER_REPLACE; 308 cls_flower.cookie = (unsigned long) f; 309 cls_flower.dissector = &f->mask->dissector; 310 cls_flower.mask = &f->mask->key; 311 cls_flower.key = &f->mkey; 312 cls_flower.exts = &f->exts; 313 cls_flower.classid = f->res.classid; 314 315 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 316 &cls_flower, skip_sw); 317 if (err < 0) { 318 fl_hw_destroy_filter(tp, f, NULL); 319 return err; 320 } else if (err > 0) { 321 f->in_hw_count = err; 322 tcf_block_offload_inc(block, &f->flags); 323 } 324 325 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 326 return -EINVAL; 327 328 return 0; 329 } 330 331 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 332 { 333 struct tc_cls_flower_offload cls_flower = {}; 334 struct tcf_block *block = tp->chain->block; 335 336 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 337 cls_flower.command = TC_CLSFLOWER_STATS; 338 cls_flower.cookie = (unsigned long) f; 339 cls_flower.exts = &f->exts; 340 cls_flower.classid = f->res.classid; 341 342 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 343 &cls_flower, false); 344 } 345 346 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 347 struct netlink_ext_ack *extack) 348 { 349 struct cls_fl_head *head = rtnl_dereference(tp->root); 350 bool async = tcf_exts_get_net(&f->exts); 351 bool last; 352 353 idr_remove(&head->handle_idr, f->handle); 354 list_del_rcu(&f->list); 355 last = fl_mask_put(head, f->mask, async); 356 if (!tc_skip_hw(f->flags)) 357 fl_hw_destroy_filter(tp, f, extack); 358 tcf_unbind_filter(tp, &f->res); 359 if (async) 360 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 361 else 362 __fl_destroy_filter(f); 363 364 return last; 365 } 366 367 static void fl_destroy_sleepable(struct work_struct *work) 368 { 369 struct cls_fl_head *head = container_of(to_rcu_work(work), 370 struct cls_fl_head, 371 rwork); 372 373 rhashtable_destroy(&head->ht); 374 kfree(head); 375 module_put(THIS_MODULE); 376 } 377 378 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack) 379 { 380 struct cls_fl_head *head = rtnl_dereference(tp->root); 381 struct fl_flow_mask *mask, *next_mask; 382 struct cls_fl_filter *f, *next; 383 384 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 385 list_for_each_entry_safe(f, next, &mask->filters, list) { 386 if (__fl_delete(tp, f, extack)) 387 break; 388 } 389 } 390 idr_destroy(&head->handle_idr); 391 392 __module_get(THIS_MODULE); 393 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 394 } 395 396 static void *fl_get(struct tcf_proto *tp, u32 handle) 397 { 398 struct cls_fl_head *head = rtnl_dereference(tp->root); 399 400 return idr_find(&head->handle_idr, handle); 401 } 402 403 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 404 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 405 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 406 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 407 .len = IFNAMSIZ }, 408 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 409 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 410 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 411 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 412 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 413 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 414 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 415 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 416 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 417 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 418 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 419 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 420 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 421 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 422 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 423 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 424 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 425 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 426 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 427 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 428 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 429 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 430 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 431 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 432 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 433 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 434 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 435 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 436 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 437 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 438 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 439 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 440 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 441 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 442 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 443 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 444 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 445 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 446 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 447 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 448 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 449 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 450 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 451 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 452 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 453 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 454 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 455 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 456 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 457 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 458 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 459 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 460 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 461 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 462 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 463 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 464 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 465 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 466 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 467 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 468 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 469 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 470 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 471 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 472 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 473 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 474 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 475 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 476 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 477 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 478 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 479 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 480 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 481 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 482 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 483 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 484 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 485 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 486 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 487 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 488 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 489 }; 490 491 static const struct nla_policy 492 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 493 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 494 }; 495 496 static const struct nla_policy 497 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 498 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 499 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 500 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 501 .len = 128 }, 502 }; 503 504 static void fl_set_key_val(struct nlattr **tb, 505 void *val, int val_type, 506 void *mask, int mask_type, int len) 507 { 508 if (!tb[val_type]) 509 return; 510 memcpy(val, nla_data(tb[val_type]), len); 511 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 512 memset(mask, 0xff, len); 513 else 514 memcpy(mask, nla_data(tb[mask_type]), len); 515 } 516 517 static int fl_set_key_mpls(struct nlattr **tb, 518 struct flow_dissector_key_mpls *key_val, 519 struct flow_dissector_key_mpls *key_mask) 520 { 521 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 522 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 523 key_mask->mpls_ttl = MPLS_TTL_MASK; 524 } 525 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 526 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 527 528 if (bos & ~MPLS_BOS_MASK) 529 return -EINVAL; 530 key_val->mpls_bos = bos; 531 key_mask->mpls_bos = MPLS_BOS_MASK; 532 } 533 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 534 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 535 536 if (tc & ~MPLS_TC_MASK) 537 return -EINVAL; 538 key_val->mpls_tc = tc; 539 key_mask->mpls_tc = MPLS_TC_MASK; 540 } 541 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 542 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 543 544 if (label & ~MPLS_LABEL_MASK) 545 return -EINVAL; 546 key_val->mpls_label = label; 547 key_mask->mpls_label = MPLS_LABEL_MASK; 548 } 549 return 0; 550 } 551 552 static void fl_set_key_vlan(struct nlattr **tb, 553 __be16 ethertype, 554 int vlan_id_key, int vlan_prio_key, 555 struct flow_dissector_key_vlan *key_val, 556 struct flow_dissector_key_vlan *key_mask) 557 { 558 #define VLAN_PRIORITY_MASK 0x7 559 560 if (tb[vlan_id_key]) { 561 key_val->vlan_id = 562 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 563 key_mask->vlan_id = VLAN_VID_MASK; 564 } 565 if (tb[vlan_prio_key]) { 566 key_val->vlan_priority = 567 nla_get_u8(tb[vlan_prio_key]) & 568 VLAN_PRIORITY_MASK; 569 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 570 } 571 key_val->vlan_tpid = ethertype; 572 key_mask->vlan_tpid = cpu_to_be16(~0); 573 } 574 575 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 576 u32 *dissector_key, u32 *dissector_mask, 577 u32 flower_flag_bit, u32 dissector_flag_bit) 578 { 579 if (flower_mask & flower_flag_bit) { 580 *dissector_mask |= dissector_flag_bit; 581 if (flower_key & flower_flag_bit) 582 *dissector_key |= dissector_flag_bit; 583 } 584 } 585 586 static int fl_set_key_flags(struct nlattr **tb, 587 u32 *flags_key, u32 *flags_mask) 588 { 589 u32 key, mask; 590 591 /* mask is mandatory for flags */ 592 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 593 return -EINVAL; 594 595 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 596 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 597 598 *flags_key = 0; 599 *flags_mask = 0; 600 601 fl_set_key_flag(key, mask, flags_key, flags_mask, 602 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 603 fl_set_key_flag(key, mask, flags_key, flags_mask, 604 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 605 FLOW_DIS_FIRST_FRAG); 606 607 return 0; 608 } 609 610 static void fl_set_key_ip(struct nlattr **tb, bool encap, 611 struct flow_dissector_key_ip *key, 612 struct flow_dissector_key_ip *mask) 613 { 614 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 615 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 616 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 617 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 618 619 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 620 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 621 } 622 623 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 624 int depth, int option_len, 625 struct netlink_ext_ack *extack) 626 { 627 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 628 struct nlattr *class = NULL, *type = NULL, *data = NULL; 629 struct geneve_opt *opt; 630 int err, data_len = 0; 631 632 if (option_len > sizeof(struct geneve_opt)) 633 data_len = option_len - sizeof(struct geneve_opt); 634 635 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 636 memset(opt, 0xff, option_len); 637 opt->length = data_len / 4; 638 opt->r1 = 0; 639 opt->r2 = 0; 640 opt->r3 = 0; 641 642 /* If no mask has been prodived we assume an exact match. */ 643 if (!depth) 644 return sizeof(struct geneve_opt) + data_len; 645 646 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 647 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 648 return -EINVAL; 649 } 650 651 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 652 nla, geneve_opt_policy, extack); 653 if (err < 0) 654 return err; 655 656 /* We are not allowed to omit any of CLASS, TYPE or DATA 657 * fields from the key. 658 */ 659 if (!option_len && 660 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 661 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 662 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 663 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 664 return -EINVAL; 665 } 666 667 /* Omitting any of CLASS, TYPE or DATA fields is allowed 668 * for the mask. 669 */ 670 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 671 int new_len = key->enc_opts.len; 672 673 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 674 data_len = nla_len(data); 675 if (data_len < 4) { 676 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 677 return -ERANGE; 678 } 679 if (data_len % 4) { 680 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 681 return -ERANGE; 682 } 683 684 new_len += sizeof(struct geneve_opt) + data_len; 685 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 686 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 687 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 688 return -ERANGE; 689 } 690 opt->length = data_len / 4; 691 memcpy(opt->opt_data, nla_data(data), data_len); 692 } 693 694 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 695 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 696 opt->opt_class = nla_get_be16(class); 697 } 698 699 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 700 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 701 opt->type = nla_get_u8(type); 702 } 703 704 return sizeof(struct geneve_opt) + data_len; 705 } 706 707 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 708 struct fl_flow_key *mask, 709 struct netlink_ext_ack *extack) 710 { 711 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 712 int option_len, key_depth, msk_depth = 0; 713 714 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 715 716 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 717 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 718 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 719 } 720 721 nla_for_each_attr(nla_opt_key, nla_enc_key, 722 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 723 switch (nla_type(nla_opt_key)) { 724 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 725 option_len = 0; 726 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 727 option_len = fl_set_geneve_opt(nla_opt_key, key, 728 key_depth, option_len, 729 extack); 730 if (option_len < 0) 731 return option_len; 732 733 key->enc_opts.len += option_len; 734 /* At the same time we need to parse through the mask 735 * in order to verify exact and mask attribute lengths. 736 */ 737 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 738 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 739 msk_depth, option_len, 740 extack); 741 if (option_len < 0) 742 return option_len; 743 744 mask->enc_opts.len += option_len; 745 if (key->enc_opts.len != mask->enc_opts.len) { 746 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 747 return -EINVAL; 748 } 749 750 if (msk_depth) 751 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 752 break; 753 default: 754 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 755 return -EINVAL; 756 } 757 } 758 759 return 0; 760 } 761 762 static int fl_set_key(struct net *net, struct nlattr **tb, 763 struct fl_flow_key *key, struct fl_flow_key *mask, 764 struct netlink_ext_ack *extack) 765 { 766 __be16 ethertype; 767 int ret = 0; 768 #ifdef CONFIG_NET_CLS_IND 769 if (tb[TCA_FLOWER_INDEV]) { 770 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 771 if (err < 0) 772 return err; 773 key->indev_ifindex = err; 774 mask->indev_ifindex = 0xffffffff; 775 } 776 #endif 777 778 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 779 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 780 sizeof(key->eth.dst)); 781 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 782 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 783 sizeof(key->eth.src)); 784 785 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 786 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 787 788 if (eth_type_vlan(ethertype)) { 789 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 790 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 791 &mask->vlan); 792 793 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 794 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 795 if (eth_type_vlan(ethertype)) { 796 fl_set_key_vlan(tb, ethertype, 797 TCA_FLOWER_KEY_CVLAN_ID, 798 TCA_FLOWER_KEY_CVLAN_PRIO, 799 &key->cvlan, &mask->cvlan); 800 fl_set_key_val(tb, &key->basic.n_proto, 801 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 802 &mask->basic.n_proto, 803 TCA_FLOWER_UNSPEC, 804 sizeof(key->basic.n_proto)); 805 } else { 806 key->basic.n_proto = ethertype; 807 mask->basic.n_proto = cpu_to_be16(~0); 808 } 809 } 810 } else { 811 key->basic.n_proto = ethertype; 812 mask->basic.n_proto = cpu_to_be16(~0); 813 } 814 } 815 816 if (key->basic.n_proto == htons(ETH_P_IP) || 817 key->basic.n_proto == htons(ETH_P_IPV6)) { 818 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 819 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 820 sizeof(key->basic.ip_proto)); 821 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 822 } 823 824 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 825 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 826 mask->control.addr_type = ~0; 827 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 828 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 829 sizeof(key->ipv4.src)); 830 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 831 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 832 sizeof(key->ipv4.dst)); 833 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 834 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 835 mask->control.addr_type = ~0; 836 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 837 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 838 sizeof(key->ipv6.src)); 839 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 840 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 841 sizeof(key->ipv6.dst)); 842 } 843 844 if (key->basic.ip_proto == IPPROTO_TCP) { 845 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 846 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 847 sizeof(key->tp.src)); 848 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 849 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 850 sizeof(key->tp.dst)); 851 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 852 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 853 sizeof(key->tcp.flags)); 854 } else if (key->basic.ip_proto == IPPROTO_UDP) { 855 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 856 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 857 sizeof(key->tp.src)); 858 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 859 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 860 sizeof(key->tp.dst)); 861 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 862 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 863 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 864 sizeof(key->tp.src)); 865 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 866 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 867 sizeof(key->tp.dst)); 868 } else if (key->basic.n_proto == htons(ETH_P_IP) && 869 key->basic.ip_proto == IPPROTO_ICMP) { 870 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 871 &mask->icmp.type, 872 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 873 sizeof(key->icmp.type)); 874 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 875 &mask->icmp.code, 876 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 877 sizeof(key->icmp.code)); 878 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 879 key->basic.ip_proto == IPPROTO_ICMPV6) { 880 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 881 &mask->icmp.type, 882 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 883 sizeof(key->icmp.type)); 884 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 885 &mask->icmp.code, 886 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 887 sizeof(key->icmp.code)); 888 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 889 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 890 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 891 if (ret) 892 return ret; 893 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 894 key->basic.n_proto == htons(ETH_P_RARP)) { 895 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 896 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 897 sizeof(key->arp.sip)); 898 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 899 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 900 sizeof(key->arp.tip)); 901 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 902 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 903 sizeof(key->arp.op)); 904 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 905 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 906 sizeof(key->arp.sha)); 907 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 908 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 909 sizeof(key->arp.tha)); 910 } 911 912 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 913 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 914 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 915 mask->enc_control.addr_type = ~0; 916 fl_set_key_val(tb, &key->enc_ipv4.src, 917 TCA_FLOWER_KEY_ENC_IPV4_SRC, 918 &mask->enc_ipv4.src, 919 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 920 sizeof(key->enc_ipv4.src)); 921 fl_set_key_val(tb, &key->enc_ipv4.dst, 922 TCA_FLOWER_KEY_ENC_IPV4_DST, 923 &mask->enc_ipv4.dst, 924 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 925 sizeof(key->enc_ipv4.dst)); 926 } 927 928 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 929 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 930 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 931 mask->enc_control.addr_type = ~0; 932 fl_set_key_val(tb, &key->enc_ipv6.src, 933 TCA_FLOWER_KEY_ENC_IPV6_SRC, 934 &mask->enc_ipv6.src, 935 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 936 sizeof(key->enc_ipv6.src)); 937 fl_set_key_val(tb, &key->enc_ipv6.dst, 938 TCA_FLOWER_KEY_ENC_IPV6_DST, 939 &mask->enc_ipv6.dst, 940 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 941 sizeof(key->enc_ipv6.dst)); 942 } 943 944 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 945 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 946 sizeof(key->enc_key_id.keyid)); 947 948 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 949 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 950 sizeof(key->enc_tp.src)); 951 952 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 953 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 954 sizeof(key->enc_tp.dst)); 955 956 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 957 958 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 959 ret = fl_set_enc_opt(tb, key, mask, extack); 960 if (ret) 961 return ret; 962 } 963 964 if (tb[TCA_FLOWER_KEY_FLAGS]) 965 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 966 967 return ret; 968 } 969 970 static void fl_mask_copy(struct fl_flow_mask *dst, 971 struct fl_flow_mask *src) 972 { 973 const void *psrc = fl_key_get_start(&src->key, src); 974 void *pdst = fl_key_get_start(&dst->key, src); 975 976 memcpy(pdst, psrc, fl_mask_range(src)); 977 dst->range = src->range; 978 } 979 980 static const struct rhashtable_params fl_ht_params = { 981 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 982 .head_offset = offsetof(struct cls_fl_filter, ht_node), 983 .automatic_shrinking = true, 984 }; 985 986 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 987 { 988 mask->filter_ht_params = fl_ht_params; 989 mask->filter_ht_params.key_len = fl_mask_range(mask); 990 mask->filter_ht_params.key_offset += mask->range.start; 991 992 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 993 } 994 995 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 996 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member) 997 998 #define FL_KEY_IS_MASKED(mask, member) \ 999 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1000 0, FL_KEY_MEMBER_SIZE(member)) \ 1001 1002 #define FL_KEY_SET(keys, cnt, id, member) \ 1003 do { \ 1004 keys[cnt].key_id = id; \ 1005 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1006 cnt++; \ 1007 } while(0); 1008 1009 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1010 do { \ 1011 if (FL_KEY_IS_MASKED(mask, member)) \ 1012 FL_KEY_SET(keys, cnt, id, member); \ 1013 } while(0); 1014 1015 static void fl_init_dissector(struct flow_dissector *dissector, 1016 struct fl_flow_key *mask) 1017 { 1018 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1019 size_t cnt = 0; 1020 1021 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1022 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1023 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1024 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1025 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1026 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1027 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1028 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1029 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1030 FLOW_DISSECTOR_KEY_PORTS, tp); 1031 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1032 FLOW_DISSECTOR_KEY_IP, ip); 1033 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1034 FLOW_DISSECTOR_KEY_TCP, tcp); 1035 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1036 FLOW_DISSECTOR_KEY_ICMP, icmp); 1037 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1038 FLOW_DISSECTOR_KEY_ARP, arp); 1039 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1040 FLOW_DISSECTOR_KEY_MPLS, mpls); 1041 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1042 FLOW_DISSECTOR_KEY_VLAN, vlan); 1043 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1044 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1045 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1046 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1047 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1048 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1049 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1050 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1051 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1052 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1053 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1054 enc_control); 1055 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1056 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1057 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1058 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1059 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1060 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1061 1062 skb_flow_dissector_init(dissector, keys, cnt); 1063 } 1064 1065 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1066 struct fl_flow_mask *mask) 1067 { 1068 struct fl_flow_mask *newmask; 1069 int err; 1070 1071 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1072 if (!newmask) 1073 return ERR_PTR(-ENOMEM); 1074 1075 fl_mask_copy(newmask, mask); 1076 1077 err = fl_init_mask_hashtable(newmask); 1078 if (err) 1079 goto errout_free; 1080 1081 fl_init_dissector(&newmask->dissector, &newmask->key); 1082 1083 INIT_LIST_HEAD_RCU(&newmask->filters); 1084 1085 err = rhashtable_insert_fast(&head->ht, &newmask->ht_node, 1086 mask_ht_params); 1087 if (err) 1088 goto errout_destroy; 1089 1090 list_add_tail_rcu(&newmask->list, &head->masks); 1091 1092 return newmask; 1093 1094 errout_destroy: 1095 rhashtable_destroy(&newmask->ht); 1096 errout_free: 1097 kfree(newmask); 1098 1099 return ERR_PTR(err); 1100 } 1101 1102 static int fl_check_assign_mask(struct cls_fl_head *head, 1103 struct cls_fl_filter *fnew, 1104 struct cls_fl_filter *fold, 1105 struct fl_flow_mask *mask) 1106 { 1107 struct fl_flow_mask *newmask; 1108 1109 fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params); 1110 if (!fnew->mask) { 1111 if (fold) 1112 return -EINVAL; 1113 1114 newmask = fl_create_new_mask(head, mask); 1115 if (IS_ERR(newmask)) 1116 return PTR_ERR(newmask); 1117 1118 fnew->mask = newmask; 1119 } else if (fold && fold->mask != fnew->mask) { 1120 return -EINVAL; 1121 } 1122 1123 return 0; 1124 } 1125 1126 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1127 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1128 unsigned long base, struct nlattr **tb, 1129 struct nlattr *est, bool ovr, 1130 struct fl_flow_tmplt *tmplt, 1131 struct netlink_ext_ack *extack) 1132 { 1133 int err; 1134 1135 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack); 1136 if (err < 0) 1137 return err; 1138 1139 if (tb[TCA_FLOWER_CLASSID]) { 1140 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1141 tcf_bind_filter(tp, &f->res, base); 1142 } 1143 1144 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1145 if (err) 1146 return err; 1147 1148 fl_mask_update_range(mask); 1149 fl_set_masked_key(&f->mkey, &f->key, mask); 1150 1151 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1152 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1153 return -EINVAL; 1154 } 1155 1156 return 0; 1157 } 1158 1159 static int fl_change(struct net *net, struct sk_buff *in_skb, 1160 struct tcf_proto *tp, unsigned long base, 1161 u32 handle, struct nlattr **tca, 1162 void **arg, bool ovr, struct netlink_ext_ack *extack) 1163 { 1164 struct cls_fl_head *head = rtnl_dereference(tp->root); 1165 struct cls_fl_filter *fold = *arg; 1166 struct cls_fl_filter *fnew; 1167 struct nlattr **tb; 1168 struct fl_flow_mask mask = {}; 1169 int err; 1170 1171 if (!tca[TCA_OPTIONS]) 1172 return -EINVAL; 1173 1174 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1175 if (!tb) 1176 return -ENOBUFS; 1177 1178 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1179 fl_policy, NULL); 1180 if (err < 0) 1181 goto errout_tb; 1182 1183 if (fold && handle && fold->handle != handle) { 1184 err = -EINVAL; 1185 goto errout_tb; 1186 } 1187 1188 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1189 if (!fnew) { 1190 err = -ENOBUFS; 1191 goto errout_tb; 1192 } 1193 1194 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 1195 if (err < 0) 1196 goto errout; 1197 1198 if (!handle) { 1199 handle = 1; 1200 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1201 INT_MAX, GFP_KERNEL); 1202 } else if (!fold) { 1203 /* user specifies a handle and it doesn't exist */ 1204 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1205 handle, GFP_KERNEL); 1206 } 1207 if (err) 1208 goto errout; 1209 fnew->handle = handle; 1210 1211 if (tb[TCA_FLOWER_FLAGS]) { 1212 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1213 1214 if (!tc_flags_valid(fnew->flags)) { 1215 err = -EINVAL; 1216 goto errout_idr; 1217 } 1218 } 1219 1220 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr, 1221 tp->chain->tmplt_priv, extack); 1222 if (err) 1223 goto errout_idr; 1224 1225 err = fl_check_assign_mask(head, fnew, fold, &mask); 1226 if (err) 1227 goto errout_idr; 1228 1229 if (!tc_skip_sw(fnew->flags)) { 1230 if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) { 1231 err = -EEXIST; 1232 goto errout_mask; 1233 } 1234 1235 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node, 1236 fnew->mask->filter_ht_params); 1237 if (err) 1238 goto errout_mask; 1239 } 1240 1241 if (!tc_skip_hw(fnew->flags)) { 1242 err = fl_hw_replace_filter(tp, fnew, extack); 1243 if (err) 1244 goto errout_mask; 1245 } 1246 1247 if (!tc_in_hw(fnew->flags)) 1248 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1249 1250 if (fold) { 1251 if (!tc_skip_sw(fold->flags)) 1252 rhashtable_remove_fast(&fold->mask->ht, 1253 &fold->ht_node, 1254 fold->mask->filter_ht_params); 1255 if (!tc_skip_hw(fold->flags)) 1256 fl_hw_destroy_filter(tp, fold, NULL); 1257 } 1258 1259 *arg = fnew; 1260 1261 if (fold) { 1262 idr_replace(&head->handle_idr, fnew, fnew->handle); 1263 list_replace_rcu(&fold->list, &fnew->list); 1264 tcf_unbind_filter(tp, &fold->res); 1265 tcf_exts_get_net(&fold->exts); 1266 tcf_queue_work(&fold->rwork, fl_destroy_filter_work); 1267 } else { 1268 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1269 } 1270 1271 kfree(tb); 1272 return 0; 1273 1274 errout_mask: 1275 fl_mask_put(head, fnew->mask, false); 1276 1277 errout_idr: 1278 if (!fold) 1279 idr_remove(&head->handle_idr, fnew->handle); 1280 errout: 1281 tcf_exts_destroy(&fnew->exts); 1282 kfree(fnew); 1283 errout_tb: 1284 kfree(tb); 1285 return err; 1286 } 1287 1288 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1289 struct netlink_ext_ack *extack) 1290 { 1291 struct cls_fl_head *head = rtnl_dereference(tp->root); 1292 struct cls_fl_filter *f = arg; 1293 1294 if (!tc_skip_sw(f->flags)) 1295 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 1296 f->mask->filter_ht_params); 1297 __fl_delete(tp, f, extack); 1298 *last = list_empty(&head->masks); 1299 return 0; 1300 } 1301 1302 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1303 { 1304 struct cls_fl_head *head = rtnl_dereference(tp->root); 1305 struct cls_fl_filter *f; 1306 1307 arg->count = arg->skip; 1308 1309 while ((f = idr_get_next_ul(&head->handle_idr, 1310 &arg->cookie)) != NULL) { 1311 if (arg->fn(tp, f, arg) < 0) { 1312 arg->stop = 1; 1313 break; 1314 } 1315 arg->cookie = f->handle + 1; 1316 arg->count++; 1317 } 1318 } 1319 1320 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1321 void *cb_priv, struct netlink_ext_ack *extack) 1322 { 1323 struct cls_fl_head *head = rtnl_dereference(tp->root); 1324 struct tc_cls_flower_offload cls_flower = {}; 1325 struct tcf_block *block = tp->chain->block; 1326 struct fl_flow_mask *mask; 1327 struct cls_fl_filter *f; 1328 int err; 1329 1330 list_for_each_entry(mask, &head->masks, list) { 1331 list_for_each_entry(f, &mask->filters, list) { 1332 if (tc_skip_hw(f->flags)) 1333 continue; 1334 1335 tc_cls_common_offload_init(&cls_flower.common, tp, 1336 f->flags, extack); 1337 cls_flower.command = add ? 1338 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1339 cls_flower.cookie = (unsigned long)f; 1340 cls_flower.dissector = &mask->dissector; 1341 cls_flower.mask = &mask->key; 1342 cls_flower.key = &f->mkey; 1343 cls_flower.exts = &f->exts; 1344 cls_flower.classid = f->res.classid; 1345 1346 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1347 if (err) { 1348 if (add && tc_skip_sw(f->flags)) 1349 return err; 1350 continue; 1351 } 1352 1353 tc_cls_offload_cnt_update(block, &f->in_hw_count, 1354 &f->flags, add); 1355 } 1356 } 1357 1358 return 0; 1359 } 1360 1361 static void fl_hw_create_tmplt(struct tcf_chain *chain, 1362 struct fl_flow_tmplt *tmplt) 1363 { 1364 struct tc_cls_flower_offload cls_flower = {}; 1365 struct tcf_block *block = chain->block; 1366 struct tcf_exts dummy_exts = { 0, }; 1367 1368 cls_flower.common.chain_index = chain->index; 1369 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1370 cls_flower.cookie = (unsigned long) tmplt; 1371 cls_flower.dissector = &tmplt->dissector; 1372 cls_flower.mask = &tmplt->mask; 1373 cls_flower.key = &tmplt->dummy_key; 1374 cls_flower.exts = &dummy_exts; 1375 1376 /* We don't care if driver (any of them) fails to handle this 1377 * call. It serves just as a hint for it. 1378 */ 1379 tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, 1380 &cls_flower, false); 1381 } 1382 1383 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1384 struct fl_flow_tmplt *tmplt) 1385 { 1386 struct tc_cls_flower_offload cls_flower = {}; 1387 struct tcf_block *block = chain->block; 1388 1389 cls_flower.common.chain_index = chain->index; 1390 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1391 cls_flower.cookie = (unsigned long) tmplt; 1392 1393 tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, 1394 &cls_flower, false); 1395 } 1396 1397 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1398 struct nlattr **tca, 1399 struct netlink_ext_ack *extack) 1400 { 1401 struct fl_flow_tmplt *tmplt; 1402 struct nlattr **tb; 1403 int err; 1404 1405 if (!tca[TCA_OPTIONS]) 1406 return ERR_PTR(-EINVAL); 1407 1408 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1409 if (!tb) 1410 return ERR_PTR(-ENOBUFS); 1411 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1412 fl_policy, NULL); 1413 if (err) 1414 goto errout_tb; 1415 1416 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1417 if (!tmplt) { 1418 err = -ENOMEM; 1419 goto errout_tb; 1420 } 1421 tmplt->chain = chain; 1422 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1423 if (err) 1424 goto errout_tmplt; 1425 kfree(tb); 1426 1427 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1428 1429 fl_hw_create_tmplt(chain, tmplt); 1430 1431 return tmplt; 1432 1433 errout_tmplt: 1434 kfree(tmplt); 1435 errout_tb: 1436 kfree(tb); 1437 return ERR_PTR(err); 1438 } 1439 1440 static void fl_tmplt_destroy(void *tmplt_priv) 1441 { 1442 struct fl_flow_tmplt *tmplt = tmplt_priv; 1443 1444 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1445 kfree(tmplt); 1446 } 1447 1448 static int fl_dump_key_val(struct sk_buff *skb, 1449 void *val, int val_type, 1450 void *mask, int mask_type, int len) 1451 { 1452 int err; 1453 1454 if (!memchr_inv(mask, 0, len)) 1455 return 0; 1456 err = nla_put(skb, val_type, len, val); 1457 if (err) 1458 return err; 1459 if (mask_type != TCA_FLOWER_UNSPEC) { 1460 err = nla_put(skb, mask_type, len, mask); 1461 if (err) 1462 return err; 1463 } 1464 return 0; 1465 } 1466 1467 static int fl_dump_key_mpls(struct sk_buff *skb, 1468 struct flow_dissector_key_mpls *mpls_key, 1469 struct flow_dissector_key_mpls *mpls_mask) 1470 { 1471 int err; 1472 1473 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1474 return 0; 1475 if (mpls_mask->mpls_ttl) { 1476 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1477 mpls_key->mpls_ttl); 1478 if (err) 1479 return err; 1480 } 1481 if (mpls_mask->mpls_tc) { 1482 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1483 mpls_key->mpls_tc); 1484 if (err) 1485 return err; 1486 } 1487 if (mpls_mask->mpls_label) { 1488 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1489 mpls_key->mpls_label); 1490 if (err) 1491 return err; 1492 } 1493 if (mpls_mask->mpls_bos) { 1494 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1495 mpls_key->mpls_bos); 1496 if (err) 1497 return err; 1498 } 1499 return 0; 1500 } 1501 1502 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1503 struct flow_dissector_key_ip *key, 1504 struct flow_dissector_key_ip *mask) 1505 { 1506 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1507 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1508 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1509 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1510 1511 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1512 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1513 return -1; 1514 1515 return 0; 1516 } 1517 1518 static int fl_dump_key_vlan(struct sk_buff *skb, 1519 int vlan_id_key, int vlan_prio_key, 1520 struct flow_dissector_key_vlan *vlan_key, 1521 struct flow_dissector_key_vlan *vlan_mask) 1522 { 1523 int err; 1524 1525 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1526 return 0; 1527 if (vlan_mask->vlan_id) { 1528 err = nla_put_u16(skb, vlan_id_key, 1529 vlan_key->vlan_id); 1530 if (err) 1531 return err; 1532 } 1533 if (vlan_mask->vlan_priority) { 1534 err = nla_put_u8(skb, vlan_prio_key, 1535 vlan_key->vlan_priority); 1536 if (err) 1537 return err; 1538 } 1539 return 0; 1540 } 1541 1542 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1543 u32 *flower_key, u32 *flower_mask, 1544 u32 flower_flag_bit, u32 dissector_flag_bit) 1545 { 1546 if (dissector_mask & dissector_flag_bit) { 1547 *flower_mask |= flower_flag_bit; 1548 if (dissector_key & dissector_flag_bit) 1549 *flower_key |= flower_flag_bit; 1550 } 1551 } 1552 1553 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1554 { 1555 u32 key, mask; 1556 __be32 _key, _mask; 1557 int err; 1558 1559 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1560 return 0; 1561 1562 key = 0; 1563 mask = 0; 1564 1565 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1566 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1567 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1568 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1569 FLOW_DIS_FIRST_FRAG); 1570 1571 _key = cpu_to_be32(key); 1572 _mask = cpu_to_be32(mask); 1573 1574 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1575 if (err) 1576 return err; 1577 1578 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1579 } 1580 1581 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 1582 struct flow_dissector_key_enc_opts *enc_opts) 1583 { 1584 struct geneve_opt *opt; 1585 struct nlattr *nest; 1586 int opt_off = 0; 1587 1588 nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 1589 if (!nest) 1590 goto nla_put_failure; 1591 1592 while (enc_opts->len > opt_off) { 1593 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 1594 1595 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 1596 opt->opt_class)) 1597 goto nla_put_failure; 1598 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 1599 opt->type)) 1600 goto nla_put_failure; 1601 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 1602 opt->length * 4, opt->opt_data)) 1603 goto nla_put_failure; 1604 1605 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 1606 } 1607 nla_nest_end(skb, nest); 1608 return 0; 1609 1610 nla_put_failure: 1611 nla_nest_cancel(skb, nest); 1612 return -EMSGSIZE; 1613 } 1614 1615 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 1616 struct flow_dissector_key_enc_opts *enc_opts) 1617 { 1618 struct nlattr *nest; 1619 int err; 1620 1621 if (!enc_opts->len) 1622 return 0; 1623 1624 nest = nla_nest_start(skb, enc_opt_type); 1625 if (!nest) 1626 goto nla_put_failure; 1627 1628 switch (enc_opts->dst_opt_type) { 1629 case TUNNEL_GENEVE_OPT: 1630 err = fl_dump_key_geneve_opt(skb, enc_opts); 1631 if (err) 1632 goto nla_put_failure; 1633 break; 1634 default: 1635 goto nla_put_failure; 1636 } 1637 nla_nest_end(skb, nest); 1638 return 0; 1639 1640 nla_put_failure: 1641 nla_nest_cancel(skb, nest); 1642 return -EMSGSIZE; 1643 } 1644 1645 static int fl_dump_key_enc_opt(struct sk_buff *skb, 1646 struct flow_dissector_key_enc_opts *key_opts, 1647 struct flow_dissector_key_enc_opts *msk_opts) 1648 { 1649 int err; 1650 1651 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 1652 if (err) 1653 return err; 1654 1655 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 1656 } 1657 1658 static int fl_dump_key(struct sk_buff *skb, struct net *net, 1659 struct fl_flow_key *key, struct fl_flow_key *mask) 1660 { 1661 if (mask->indev_ifindex) { 1662 struct net_device *dev; 1663 1664 dev = __dev_get_by_index(net, key->indev_ifindex); 1665 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1666 goto nla_put_failure; 1667 } 1668 1669 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1670 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1671 sizeof(key->eth.dst)) || 1672 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1673 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1674 sizeof(key->eth.src)) || 1675 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1676 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1677 sizeof(key->basic.n_proto))) 1678 goto nla_put_failure; 1679 1680 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1681 goto nla_put_failure; 1682 1683 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 1684 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 1685 goto nla_put_failure; 1686 1687 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 1688 TCA_FLOWER_KEY_CVLAN_PRIO, 1689 &key->cvlan, &mask->cvlan) || 1690 (mask->cvlan.vlan_tpid && 1691 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1692 key->cvlan.vlan_tpid))) 1693 goto nla_put_failure; 1694 1695 if (mask->basic.n_proto) { 1696 if (mask->cvlan.vlan_tpid) { 1697 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1698 key->basic.n_proto)) 1699 goto nla_put_failure; 1700 } else if (mask->vlan.vlan_tpid) { 1701 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1702 key->basic.n_proto)) 1703 goto nla_put_failure; 1704 } 1705 } 1706 1707 if ((key->basic.n_proto == htons(ETH_P_IP) || 1708 key->basic.n_proto == htons(ETH_P_IPV6)) && 1709 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1710 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1711 sizeof(key->basic.ip_proto)) || 1712 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 1713 goto nla_put_failure; 1714 1715 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1716 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1717 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1718 sizeof(key->ipv4.src)) || 1719 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1720 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1721 sizeof(key->ipv4.dst)))) 1722 goto nla_put_failure; 1723 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1724 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1725 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1726 sizeof(key->ipv6.src)) || 1727 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1728 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1729 sizeof(key->ipv6.dst)))) 1730 goto nla_put_failure; 1731 1732 if (key->basic.ip_proto == IPPROTO_TCP && 1733 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1734 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1735 sizeof(key->tp.src)) || 1736 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1737 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1738 sizeof(key->tp.dst)) || 1739 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1740 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1741 sizeof(key->tcp.flags)))) 1742 goto nla_put_failure; 1743 else if (key->basic.ip_proto == IPPROTO_UDP && 1744 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1745 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1746 sizeof(key->tp.src)) || 1747 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1748 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1749 sizeof(key->tp.dst)))) 1750 goto nla_put_failure; 1751 else if (key->basic.ip_proto == IPPROTO_SCTP && 1752 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1753 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1754 sizeof(key->tp.src)) || 1755 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1756 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1757 sizeof(key->tp.dst)))) 1758 goto nla_put_failure; 1759 else if (key->basic.n_proto == htons(ETH_P_IP) && 1760 key->basic.ip_proto == IPPROTO_ICMP && 1761 (fl_dump_key_val(skb, &key->icmp.type, 1762 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1763 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1764 sizeof(key->icmp.type)) || 1765 fl_dump_key_val(skb, &key->icmp.code, 1766 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1767 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1768 sizeof(key->icmp.code)))) 1769 goto nla_put_failure; 1770 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1771 key->basic.ip_proto == IPPROTO_ICMPV6 && 1772 (fl_dump_key_val(skb, &key->icmp.type, 1773 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1774 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1775 sizeof(key->icmp.type)) || 1776 fl_dump_key_val(skb, &key->icmp.code, 1777 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1778 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1779 sizeof(key->icmp.code)))) 1780 goto nla_put_failure; 1781 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1782 key->basic.n_proto == htons(ETH_P_RARP)) && 1783 (fl_dump_key_val(skb, &key->arp.sip, 1784 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1785 TCA_FLOWER_KEY_ARP_SIP_MASK, 1786 sizeof(key->arp.sip)) || 1787 fl_dump_key_val(skb, &key->arp.tip, 1788 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1789 TCA_FLOWER_KEY_ARP_TIP_MASK, 1790 sizeof(key->arp.tip)) || 1791 fl_dump_key_val(skb, &key->arp.op, 1792 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1793 TCA_FLOWER_KEY_ARP_OP_MASK, 1794 sizeof(key->arp.op)) || 1795 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1796 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1797 sizeof(key->arp.sha)) || 1798 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1799 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1800 sizeof(key->arp.tha)))) 1801 goto nla_put_failure; 1802 1803 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1804 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1805 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1806 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1807 sizeof(key->enc_ipv4.src)) || 1808 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1809 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1810 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1811 sizeof(key->enc_ipv4.dst)))) 1812 goto nla_put_failure; 1813 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1814 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1815 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1816 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1817 sizeof(key->enc_ipv6.src)) || 1818 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1819 TCA_FLOWER_KEY_ENC_IPV6_DST, 1820 &mask->enc_ipv6.dst, 1821 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1822 sizeof(key->enc_ipv6.dst)))) 1823 goto nla_put_failure; 1824 1825 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1826 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1827 sizeof(key->enc_key_id)) || 1828 fl_dump_key_val(skb, &key->enc_tp.src, 1829 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1830 &mask->enc_tp.src, 1831 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1832 sizeof(key->enc_tp.src)) || 1833 fl_dump_key_val(skb, &key->enc_tp.dst, 1834 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1835 &mask->enc_tp.dst, 1836 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1837 sizeof(key->enc_tp.dst)) || 1838 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 1839 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 1840 goto nla_put_failure; 1841 1842 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1843 goto nla_put_failure; 1844 1845 return 0; 1846 1847 nla_put_failure: 1848 return -EMSGSIZE; 1849 } 1850 1851 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1852 struct sk_buff *skb, struct tcmsg *t) 1853 { 1854 struct cls_fl_filter *f = fh; 1855 struct nlattr *nest; 1856 struct fl_flow_key *key, *mask; 1857 1858 if (!f) 1859 return skb->len; 1860 1861 t->tcm_handle = f->handle; 1862 1863 nest = nla_nest_start(skb, TCA_OPTIONS); 1864 if (!nest) 1865 goto nla_put_failure; 1866 1867 if (f->res.classid && 1868 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1869 goto nla_put_failure; 1870 1871 key = &f->key; 1872 mask = &f->mask->key; 1873 1874 if (fl_dump_key(skb, net, key, mask)) 1875 goto nla_put_failure; 1876 1877 if (!tc_skip_hw(f->flags)) 1878 fl_hw_update_stats(tp, f); 1879 1880 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1881 goto nla_put_failure; 1882 1883 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 1884 goto nla_put_failure; 1885 1886 if (tcf_exts_dump(skb, &f->exts)) 1887 goto nla_put_failure; 1888 1889 nla_nest_end(skb, nest); 1890 1891 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1892 goto nla_put_failure; 1893 1894 return skb->len; 1895 1896 nla_put_failure: 1897 nla_nest_cancel(skb, nest); 1898 return -1; 1899 } 1900 1901 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 1902 { 1903 struct fl_flow_tmplt *tmplt = tmplt_priv; 1904 struct fl_flow_key *key, *mask; 1905 struct nlattr *nest; 1906 1907 nest = nla_nest_start(skb, TCA_OPTIONS); 1908 if (!nest) 1909 goto nla_put_failure; 1910 1911 key = &tmplt->dummy_key; 1912 mask = &tmplt->mask; 1913 1914 if (fl_dump_key(skb, net, key, mask)) 1915 goto nla_put_failure; 1916 1917 nla_nest_end(skb, nest); 1918 1919 return skb->len; 1920 1921 nla_put_failure: 1922 nla_nest_cancel(skb, nest); 1923 return -EMSGSIZE; 1924 } 1925 1926 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1927 { 1928 struct cls_fl_filter *f = fh; 1929 1930 if (f && f->res.classid == classid) 1931 f->res.class = cl; 1932 } 1933 1934 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1935 .kind = "flower", 1936 .classify = fl_classify, 1937 .init = fl_init, 1938 .destroy = fl_destroy, 1939 .get = fl_get, 1940 .change = fl_change, 1941 .delete = fl_delete, 1942 .walk = fl_walk, 1943 .reoffload = fl_reoffload, 1944 .dump = fl_dump, 1945 .bind_class = fl_bind_class, 1946 .tmplt_create = fl_tmplt_create, 1947 .tmplt_destroy = fl_tmplt_destroy, 1948 .tmplt_dump = fl_tmplt_dump, 1949 .owner = THIS_MODULE, 1950 }; 1951 1952 static int __init cls_fl_init(void) 1953 { 1954 return register_tcf_proto_ops(&cls_fl_ops); 1955 } 1956 1957 static void __exit cls_fl_exit(void) 1958 { 1959 unregister_tcf_proto_ops(&cls_fl_ops); 1960 } 1961 1962 module_init(cls_fl_init); 1963 module_exit(cls_fl_exit); 1964 1965 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1966 MODULE_DESCRIPTION("Flower classifier"); 1967 MODULE_LICENSE("GPL v2"); 1968