1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/sched/cls_flower.c Flower classifier 4 * 5 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/init.h> 10 #include <linux/module.h> 11 #include <linux/rhashtable.h> 12 #include <linux/workqueue.h> 13 #include <linux/refcount.h> 14 15 #include <linux/if_ether.h> 16 #include <linux/in6.h> 17 #include <linux/ip.h> 18 #include <linux/mpls.h> 19 #include <linux/ppp_defs.h> 20 21 #include <net/sch_generic.h> 22 #include <net/pkt_cls.h> 23 #include <net/pkt_sched.h> 24 #include <net/ip.h> 25 #include <net/flow_dissector.h> 26 #include <net/geneve.h> 27 #include <net/vxlan.h> 28 #include <net/erspan.h> 29 #include <net/gtp.h> 30 #include <net/tc_wrapper.h> 31 32 #include <net/dst.h> 33 #include <net/dst_metadata.h> 34 35 #include <uapi/linux/netfilter/nf_conntrack_common.h> 36 37 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 38 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 39 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 40 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 41 42 struct fl_flow_key { 43 struct flow_dissector_key_meta meta; 44 struct flow_dissector_key_control control; 45 struct flow_dissector_key_control enc_control; 46 struct flow_dissector_key_basic basic; 47 struct flow_dissector_key_eth_addrs eth; 48 struct flow_dissector_key_vlan vlan; 49 struct flow_dissector_key_vlan cvlan; 50 union { 51 struct flow_dissector_key_ipv4_addrs ipv4; 52 struct flow_dissector_key_ipv6_addrs ipv6; 53 }; 54 struct flow_dissector_key_ports tp; 55 struct flow_dissector_key_icmp icmp; 56 struct flow_dissector_key_arp arp; 57 struct flow_dissector_key_keyid enc_key_id; 58 union { 59 struct flow_dissector_key_ipv4_addrs enc_ipv4; 60 struct flow_dissector_key_ipv6_addrs enc_ipv6; 61 }; 62 struct flow_dissector_key_ports enc_tp; 63 struct flow_dissector_key_mpls mpls; 64 struct flow_dissector_key_tcp tcp; 65 struct flow_dissector_key_ip ip; 66 struct flow_dissector_key_ip enc_ip; 67 struct flow_dissector_key_enc_opts enc_opts; 68 struct flow_dissector_key_ports_range tp_range; 69 struct flow_dissector_key_ct ct; 70 struct flow_dissector_key_hash hash; 71 struct flow_dissector_key_num_of_vlans num_of_vlans; 72 struct flow_dissector_key_pppoe pppoe; 73 struct flow_dissector_key_l2tpv3 l2tpv3; 74 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 75 76 struct fl_flow_mask_range { 77 unsigned short int start; 78 unsigned short int end; 79 }; 80 81 struct fl_flow_mask { 82 struct fl_flow_key key; 83 struct fl_flow_mask_range range; 84 u32 flags; 85 struct rhash_head ht_node; 86 struct rhashtable ht; 87 struct rhashtable_params filter_ht_params; 88 struct flow_dissector dissector; 89 struct list_head filters; 90 struct rcu_work rwork; 91 struct list_head list; 92 refcount_t refcnt; 93 }; 94 95 struct fl_flow_tmplt { 96 struct fl_flow_key dummy_key; 97 struct fl_flow_key mask; 98 struct flow_dissector dissector; 99 struct tcf_chain *chain; 100 }; 101 102 struct cls_fl_head { 103 struct rhashtable ht; 104 spinlock_t masks_lock; /* Protect masks list */ 105 struct list_head masks; 106 struct list_head hw_filters; 107 struct rcu_work rwork; 108 struct idr handle_idr; 109 }; 110 111 struct cls_fl_filter { 112 struct fl_flow_mask *mask; 113 struct rhash_head ht_node; 114 struct fl_flow_key mkey; 115 struct tcf_exts exts; 116 struct tcf_result res; 117 struct fl_flow_key key; 118 struct list_head list; 119 struct list_head hw_list; 120 u32 handle; 121 u32 flags; 122 u32 in_hw_count; 123 struct rcu_work rwork; 124 struct net_device *hw_dev; 125 /* Flower classifier is unlocked, which means that its reference counter 126 * can be changed concurrently without any kind of external 127 * synchronization. Use atomic reference counter to be concurrency-safe. 128 */ 129 refcount_t refcnt; 130 bool deleted; 131 }; 132 133 static const struct rhashtable_params mask_ht_params = { 134 .key_offset = offsetof(struct fl_flow_mask, key), 135 .key_len = sizeof(struct fl_flow_key), 136 .head_offset = offsetof(struct fl_flow_mask, ht_node), 137 .automatic_shrinking = true, 138 }; 139 140 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 141 { 142 return mask->range.end - mask->range.start; 143 } 144 145 static void fl_mask_update_range(struct fl_flow_mask *mask) 146 { 147 const u8 *bytes = (const u8 *) &mask->key; 148 size_t size = sizeof(mask->key); 149 size_t i, first = 0, last; 150 151 for (i = 0; i < size; i++) { 152 if (bytes[i]) { 153 first = i; 154 break; 155 } 156 } 157 last = first; 158 for (i = size - 1; i != first; i--) { 159 if (bytes[i]) { 160 last = i; 161 break; 162 } 163 } 164 mask->range.start = rounddown(first, sizeof(long)); 165 mask->range.end = roundup(last + 1, sizeof(long)); 166 } 167 168 static void *fl_key_get_start(struct fl_flow_key *key, 169 const struct fl_flow_mask *mask) 170 { 171 return (u8 *) key + mask->range.start; 172 } 173 174 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 175 struct fl_flow_mask *mask) 176 { 177 const long *lkey = fl_key_get_start(key, mask); 178 const long *lmask = fl_key_get_start(&mask->key, mask); 179 long *lmkey = fl_key_get_start(mkey, mask); 180 int i; 181 182 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 183 *lmkey++ = *lkey++ & *lmask++; 184 } 185 186 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 187 struct fl_flow_mask *mask) 188 { 189 const long *lmask = fl_key_get_start(&mask->key, mask); 190 const long *ltmplt; 191 int i; 192 193 if (!tmplt) 194 return true; 195 ltmplt = fl_key_get_start(&tmplt->mask, mask); 196 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 197 if (~*ltmplt++ & *lmask++) 198 return false; 199 } 200 return true; 201 } 202 203 static void fl_clear_masked_range(struct fl_flow_key *key, 204 struct fl_flow_mask *mask) 205 { 206 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 207 } 208 209 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 210 struct fl_flow_key *key, 211 struct fl_flow_key *mkey) 212 { 213 u16 min_mask, max_mask, min_val, max_val; 214 215 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 216 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 217 min_val = ntohs(filter->key.tp_range.tp_min.dst); 218 max_val = ntohs(filter->key.tp_range.tp_max.dst); 219 220 if (min_mask && max_mask) { 221 if (ntohs(key->tp_range.tp.dst) < min_val || 222 ntohs(key->tp_range.tp.dst) > max_val) 223 return false; 224 225 /* skb does not have min and max values */ 226 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 227 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 228 } 229 return true; 230 } 231 232 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 233 struct fl_flow_key *key, 234 struct fl_flow_key *mkey) 235 { 236 u16 min_mask, max_mask, min_val, max_val; 237 238 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 239 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 240 min_val = ntohs(filter->key.tp_range.tp_min.src); 241 max_val = ntohs(filter->key.tp_range.tp_max.src); 242 243 if (min_mask && max_mask) { 244 if (ntohs(key->tp_range.tp.src) < min_val || 245 ntohs(key->tp_range.tp.src) > max_val) 246 return false; 247 248 /* skb does not have min and max values */ 249 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 250 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 251 } 252 return true; 253 } 254 255 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 256 struct fl_flow_key *mkey) 257 { 258 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 259 mask->filter_ht_params); 260 } 261 262 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 263 struct fl_flow_key *mkey, 264 struct fl_flow_key *key) 265 { 266 struct cls_fl_filter *filter, *f; 267 268 list_for_each_entry_rcu(filter, &mask->filters, list) { 269 if (!fl_range_port_dst_cmp(filter, key, mkey)) 270 continue; 271 272 if (!fl_range_port_src_cmp(filter, key, mkey)) 273 continue; 274 275 f = __fl_lookup(mask, mkey); 276 if (f) 277 return f; 278 } 279 return NULL; 280 } 281 282 static noinline_for_stack 283 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 284 { 285 struct fl_flow_key mkey; 286 287 fl_set_masked_key(&mkey, key, mask); 288 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 289 return fl_lookup_range(mask, &mkey, key); 290 291 return __fl_lookup(mask, &mkey); 292 } 293 294 static u16 fl_ct_info_to_flower_map[] = { 295 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 296 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 297 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 298 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 299 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 300 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 301 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 302 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 303 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 304 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 305 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 306 TCA_FLOWER_KEY_CT_FLAGS_NEW, 307 }; 308 309 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb, 310 const struct tcf_proto *tp, 311 struct tcf_result *res) 312 { 313 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 314 bool post_ct = tc_skb_cb(skb)->post_ct; 315 u16 zone = tc_skb_cb(skb)->zone; 316 struct fl_flow_key skb_key; 317 struct fl_flow_mask *mask; 318 struct cls_fl_filter *f; 319 320 list_for_each_entry_rcu(mask, &head->masks, list) { 321 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 322 fl_clear_masked_range(&skb_key, mask); 323 324 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 325 /* skb_flow_dissect() does not set n_proto in case an unknown 326 * protocol, so do it rather here. 327 */ 328 skb_key.basic.n_proto = skb_protocol(skb, false); 329 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 330 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 331 fl_ct_info_to_flower_map, 332 ARRAY_SIZE(fl_ct_info_to_flower_map), 333 post_ct, zone); 334 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 335 skb_flow_dissect(skb, &mask->dissector, &skb_key, 336 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); 337 338 f = fl_mask_lookup(mask, &skb_key); 339 if (f && !tc_skip_sw(f->flags)) { 340 *res = f->res; 341 return tcf_exts_exec(skb, &f->exts, res); 342 } 343 } 344 return -1; 345 } 346 347 static int fl_init(struct tcf_proto *tp) 348 { 349 struct cls_fl_head *head; 350 351 head = kzalloc(sizeof(*head), GFP_KERNEL); 352 if (!head) 353 return -ENOBUFS; 354 355 spin_lock_init(&head->masks_lock); 356 INIT_LIST_HEAD_RCU(&head->masks); 357 INIT_LIST_HEAD(&head->hw_filters); 358 rcu_assign_pointer(tp->root, head); 359 idr_init(&head->handle_idr); 360 361 return rhashtable_init(&head->ht, &mask_ht_params); 362 } 363 364 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 365 { 366 /* temporary masks don't have their filters list and ht initialized */ 367 if (mask_init_done) { 368 WARN_ON(!list_empty(&mask->filters)); 369 rhashtable_destroy(&mask->ht); 370 } 371 kfree(mask); 372 } 373 374 static void fl_mask_free_work(struct work_struct *work) 375 { 376 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 377 struct fl_flow_mask, rwork); 378 379 fl_mask_free(mask, true); 380 } 381 382 static void fl_uninit_mask_free_work(struct work_struct *work) 383 { 384 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 385 struct fl_flow_mask, rwork); 386 387 fl_mask_free(mask, false); 388 } 389 390 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 391 { 392 if (!refcount_dec_and_test(&mask->refcnt)) 393 return false; 394 395 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 396 397 spin_lock(&head->masks_lock); 398 list_del_rcu(&mask->list); 399 spin_unlock(&head->masks_lock); 400 401 tcf_queue_work(&mask->rwork, fl_mask_free_work); 402 403 return true; 404 } 405 406 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 407 { 408 /* Flower classifier only changes root pointer during init and destroy. 409 * Users must obtain reference to tcf_proto instance before calling its 410 * API, so tp->root pointer is protected from concurrent call to 411 * fl_destroy() by reference counting. 412 */ 413 return rcu_dereference_raw(tp->root); 414 } 415 416 static void __fl_destroy_filter(struct cls_fl_filter *f) 417 { 418 tcf_exts_destroy(&f->exts); 419 tcf_exts_put_net(&f->exts); 420 kfree(f); 421 } 422 423 static void fl_destroy_filter_work(struct work_struct *work) 424 { 425 struct cls_fl_filter *f = container_of(to_rcu_work(work), 426 struct cls_fl_filter, rwork); 427 428 __fl_destroy_filter(f); 429 } 430 431 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 432 bool rtnl_held, struct netlink_ext_ack *extack) 433 { 434 struct tcf_block *block = tp->chain->block; 435 struct flow_cls_offload cls_flower = {}; 436 437 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 438 cls_flower.command = FLOW_CLS_DESTROY; 439 cls_flower.cookie = (unsigned long) f; 440 441 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 442 &f->flags, &f->in_hw_count, rtnl_held); 443 444 } 445 446 static int fl_hw_replace_filter(struct tcf_proto *tp, 447 struct cls_fl_filter *f, bool rtnl_held, 448 struct netlink_ext_ack *extack) 449 { 450 struct tcf_block *block = tp->chain->block; 451 struct flow_cls_offload cls_flower = {}; 452 bool skip_sw = tc_skip_sw(f->flags); 453 int err = 0; 454 455 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 456 if (!cls_flower.rule) 457 return -ENOMEM; 458 459 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 460 cls_flower.command = FLOW_CLS_REPLACE; 461 cls_flower.cookie = (unsigned long) f; 462 cls_flower.rule->match.dissector = &f->mask->dissector; 463 cls_flower.rule->match.mask = &f->mask->key; 464 cls_flower.rule->match.key = &f->mkey; 465 cls_flower.classid = f->res.classid; 466 467 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 468 cls_flower.common.extack); 469 if (err) { 470 kfree(cls_flower.rule); 471 472 return skip_sw ? err : 0; 473 } 474 475 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 476 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 477 tc_cleanup_offload_action(&cls_flower.rule->action); 478 kfree(cls_flower.rule); 479 480 if (err) { 481 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 482 return err; 483 } 484 485 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 486 return -EINVAL; 487 488 return 0; 489 } 490 491 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 492 bool rtnl_held) 493 { 494 struct tcf_block *block = tp->chain->block; 495 struct flow_cls_offload cls_flower = {}; 496 497 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 498 cls_flower.command = FLOW_CLS_STATS; 499 cls_flower.cookie = (unsigned long) f; 500 cls_flower.classid = f->res.classid; 501 502 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 503 rtnl_held); 504 505 tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats); 506 } 507 508 static void __fl_put(struct cls_fl_filter *f) 509 { 510 if (!refcount_dec_and_test(&f->refcnt)) 511 return; 512 513 if (tcf_exts_get_net(&f->exts)) 514 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 515 else 516 __fl_destroy_filter(f); 517 } 518 519 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 520 { 521 struct cls_fl_filter *f; 522 523 rcu_read_lock(); 524 f = idr_find(&head->handle_idr, handle); 525 if (f && !refcount_inc_not_zero(&f->refcnt)) 526 f = NULL; 527 rcu_read_unlock(); 528 529 return f; 530 } 531 532 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 533 bool *last, bool rtnl_held, 534 struct netlink_ext_ack *extack) 535 { 536 struct cls_fl_head *head = fl_head_dereference(tp); 537 538 *last = false; 539 540 spin_lock(&tp->lock); 541 if (f->deleted) { 542 spin_unlock(&tp->lock); 543 return -ENOENT; 544 } 545 546 f->deleted = true; 547 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 548 f->mask->filter_ht_params); 549 idr_remove(&head->handle_idr, f->handle); 550 list_del_rcu(&f->list); 551 spin_unlock(&tp->lock); 552 553 *last = fl_mask_put(head, f->mask); 554 if (!tc_skip_hw(f->flags)) 555 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 556 tcf_unbind_filter(tp, &f->res); 557 __fl_put(f); 558 559 return 0; 560 } 561 562 static void fl_destroy_sleepable(struct work_struct *work) 563 { 564 struct cls_fl_head *head = container_of(to_rcu_work(work), 565 struct cls_fl_head, 566 rwork); 567 568 rhashtable_destroy(&head->ht); 569 kfree(head); 570 module_put(THIS_MODULE); 571 } 572 573 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 574 struct netlink_ext_ack *extack) 575 { 576 struct cls_fl_head *head = fl_head_dereference(tp); 577 struct fl_flow_mask *mask, *next_mask; 578 struct cls_fl_filter *f, *next; 579 bool last; 580 581 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 582 list_for_each_entry_safe(f, next, &mask->filters, list) { 583 __fl_delete(tp, f, &last, rtnl_held, extack); 584 if (last) 585 break; 586 } 587 } 588 idr_destroy(&head->handle_idr); 589 590 __module_get(THIS_MODULE); 591 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 592 } 593 594 static void fl_put(struct tcf_proto *tp, void *arg) 595 { 596 struct cls_fl_filter *f = arg; 597 598 __fl_put(f); 599 } 600 601 static void *fl_get(struct tcf_proto *tp, u32 handle) 602 { 603 struct cls_fl_head *head = fl_head_dereference(tp); 604 605 return __fl_get(head, handle); 606 } 607 608 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 609 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 610 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 611 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 612 .len = IFNAMSIZ }, 613 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 614 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 615 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 616 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 617 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 618 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 619 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 620 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 621 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 622 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 623 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 624 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 625 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 626 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 627 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 628 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 629 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 630 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 631 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 632 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 633 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 634 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 635 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 636 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 637 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 638 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 639 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 640 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 641 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 642 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 643 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 644 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 646 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 648 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 649 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 650 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 651 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 652 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 653 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 654 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 655 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 656 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 657 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 658 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 659 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 660 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 661 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 662 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 663 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 664 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 665 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 666 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 667 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 668 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 669 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 670 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 671 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 672 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 673 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 674 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 675 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 676 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 677 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 678 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 679 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 680 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 681 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 682 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 683 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 684 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 685 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 686 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 687 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 688 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 689 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 690 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 692 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 694 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 695 [TCA_FLOWER_KEY_CT_STATE] = 696 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 697 [TCA_FLOWER_KEY_CT_STATE_MASK] = 698 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 699 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 700 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 701 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 702 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 703 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 704 .len = 128 / BITS_PER_BYTE }, 705 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 706 .len = 128 / BITS_PER_BYTE }, 707 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 708 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 709 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 710 [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, 711 [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, 712 [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, 713 [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, 714 715 }; 716 717 static const struct nla_policy 718 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 719 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 720 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 721 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 722 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 723 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 724 [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .type = NLA_NESTED }, 725 }; 726 727 static const struct nla_policy 728 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 729 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 730 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 731 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 732 .len = 128 }, 733 }; 734 735 static const struct nla_policy 736 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 737 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 738 }; 739 740 static const struct nla_policy 741 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 742 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 743 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 744 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 745 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 746 }; 747 748 static const struct nla_policy 749 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { 750 [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, 751 [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, 752 }; 753 754 static const struct nla_policy 755 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 756 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 757 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 758 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 759 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 760 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 761 }; 762 763 static void fl_set_key_val(struct nlattr **tb, 764 void *val, int val_type, 765 void *mask, int mask_type, int len) 766 { 767 if (!tb[val_type]) 768 return; 769 nla_memcpy(val, tb[val_type], len); 770 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 771 memset(mask, 0xff, len); 772 else 773 nla_memcpy(mask, tb[mask_type], len); 774 } 775 776 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 777 struct fl_flow_key *mask, 778 struct netlink_ext_ack *extack) 779 { 780 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 781 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 782 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 783 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 784 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 785 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 786 fl_set_key_val(tb, &key->tp_range.tp_min.src, 787 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 788 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 789 fl_set_key_val(tb, &key->tp_range.tp_max.src, 790 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 791 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 792 793 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 794 ntohs(key->tp_range.tp_max.dst) <= 795 ntohs(key->tp_range.tp_min.dst)) { 796 NL_SET_ERR_MSG_ATTR(extack, 797 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 798 "Invalid destination port range (min must be strictly smaller than max)"); 799 return -EINVAL; 800 } 801 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 802 ntohs(key->tp_range.tp_max.src) <= 803 ntohs(key->tp_range.tp_min.src)) { 804 NL_SET_ERR_MSG_ATTR(extack, 805 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 806 "Invalid source port range (min must be strictly smaller than max)"); 807 return -EINVAL; 808 } 809 810 return 0; 811 } 812 813 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 814 struct flow_dissector_key_mpls *key_val, 815 struct flow_dissector_key_mpls *key_mask, 816 struct netlink_ext_ack *extack) 817 { 818 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 819 struct flow_dissector_mpls_lse *lse_mask; 820 struct flow_dissector_mpls_lse *lse_val; 821 u8 lse_index; 822 u8 depth; 823 int err; 824 825 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 826 mpls_stack_entry_policy, extack); 827 if (err < 0) 828 return err; 829 830 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 831 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 832 return -EINVAL; 833 } 834 835 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 836 837 /* LSE depth starts at 1, for consistency with terminology used by 838 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 839 */ 840 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 841 NL_SET_ERR_MSG_ATTR(extack, 842 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 843 "Invalid MPLS depth"); 844 return -EINVAL; 845 } 846 lse_index = depth - 1; 847 848 dissector_set_mpls_lse(key_val, lse_index); 849 dissector_set_mpls_lse(key_mask, lse_index); 850 851 lse_val = &key_val->ls[lse_index]; 852 lse_mask = &key_mask->ls[lse_index]; 853 854 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 855 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 856 lse_mask->mpls_ttl = MPLS_TTL_MASK; 857 } 858 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 859 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 860 861 if (bos & ~MPLS_BOS_MASK) { 862 NL_SET_ERR_MSG_ATTR(extack, 863 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 864 "Bottom Of Stack (BOS) must be 0 or 1"); 865 return -EINVAL; 866 } 867 lse_val->mpls_bos = bos; 868 lse_mask->mpls_bos = MPLS_BOS_MASK; 869 } 870 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 871 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 872 873 if (tc & ~MPLS_TC_MASK) { 874 NL_SET_ERR_MSG_ATTR(extack, 875 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 876 "Traffic Class (TC) must be between 0 and 7"); 877 return -EINVAL; 878 } 879 lse_val->mpls_tc = tc; 880 lse_mask->mpls_tc = MPLS_TC_MASK; 881 } 882 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 883 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 884 885 if (label & ~MPLS_LABEL_MASK) { 886 NL_SET_ERR_MSG_ATTR(extack, 887 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 888 "Label must be between 0 and 1048575"); 889 return -EINVAL; 890 } 891 lse_val->mpls_label = label; 892 lse_mask->mpls_label = MPLS_LABEL_MASK; 893 } 894 895 return 0; 896 } 897 898 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 899 struct flow_dissector_key_mpls *key_val, 900 struct flow_dissector_key_mpls *key_mask, 901 struct netlink_ext_ack *extack) 902 { 903 struct nlattr *nla_lse; 904 int rem; 905 int err; 906 907 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 908 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 909 "NLA_F_NESTED is missing"); 910 return -EINVAL; 911 } 912 913 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 914 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 915 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 916 "Invalid MPLS option type"); 917 return -EINVAL; 918 } 919 920 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 921 if (err < 0) 922 return err; 923 } 924 if (rem) { 925 NL_SET_ERR_MSG(extack, 926 "Bytes leftover after parsing MPLS options"); 927 return -EINVAL; 928 } 929 930 return 0; 931 } 932 933 static int fl_set_key_mpls(struct nlattr **tb, 934 struct flow_dissector_key_mpls *key_val, 935 struct flow_dissector_key_mpls *key_mask, 936 struct netlink_ext_ack *extack) 937 { 938 struct flow_dissector_mpls_lse *lse_mask; 939 struct flow_dissector_mpls_lse *lse_val; 940 941 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 942 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 943 tb[TCA_FLOWER_KEY_MPLS_BOS] || 944 tb[TCA_FLOWER_KEY_MPLS_TC] || 945 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 946 NL_SET_ERR_MSG_ATTR(extack, 947 tb[TCA_FLOWER_KEY_MPLS_OPTS], 948 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 949 return -EBADMSG; 950 } 951 952 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 953 key_val, key_mask, extack); 954 } 955 956 lse_val = &key_val->ls[0]; 957 lse_mask = &key_mask->ls[0]; 958 959 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 960 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 961 lse_mask->mpls_ttl = MPLS_TTL_MASK; 962 dissector_set_mpls_lse(key_val, 0); 963 dissector_set_mpls_lse(key_mask, 0); 964 } 965 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 966 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 967 968 if (bos & ~MPLS_BOS_MASK) { 969 NL_SET_ERR_MSG_ATTR(extack, 970 tb[TCA_FLOWER_KEY_MPLS_BOS], 971 "Bottom Of Stack (BOS) must be 0 or 1"); 972 return -EINVAL; 973 } 974 lse_val->mpls_bos = bos; 975 lse_mask->mpls_bos = MPLS_BOS_MASK; 976 dissector_set_mpls_lse(key_val, 0); 977 dissector_set_mpls_lse(key_mask, 0); 978 } 979 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 980 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 981 982 if (tc & ~MPLS_TC_MASK) { 983 NL_SET_ERR_MSG_ATTR(extack, 984 tb[TCA_FLOWER_KEY_MPLS_TC], 985 "Traffic Class (TC) must be between 0 and 7"); 986 return -EINVAL; 987 } 988 lse_val->mpls_tc = tc; 989 lse_mask->mpls_tc = MPLS_TC_MASK; 990 dissector_set_mpls_lse(key_val, 0); 991 dissector_set_mpls_lse(key_mask, 0); 992 } 993 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 994 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 995 996 if (label & ~MPLS_LABEL_MASK) { 997 NL_SET_ERR_MSG_ATTR(extack, 998 tb[TCA_FLOWER_KEY_MPLS_LABEL], 999 "Label must be between 0 and 1048575"); 1000 return -EINVAL; 1001 } 1002 lse_val->mpls_label = label; 1003 lse_mask->mpls_label = MPLS_LABEL_MASK; 1004 dissector_set_mpls_lse(key_val, 0); 1005 dissector_set_mpls_lse(key_mask, 0); 1006 } 1007 return 0; 1008 } 1009 1010 static void fl_set_key_vlan(struct nlattr **tb, 1011 __be16 ethertype, 1012 int vlan_id_key, int vlan_prio_key, 1013 int vlan_next_eth_type_key, 1014 struct flow_dissector_key_vlan *key_val, 1015 struct flow_dissector_key_vlan *key_mask) 1016 { 1017 #define VLAN_PRIORITY_MASK 0x7 1018 1019 if (tb[vlan_id_key]) { 1020 key_val->vlan_id = 1021 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1022 key_mask->vlan_id = VLAN_VID_MASK; 1023 } 1024 if (tb[vlan_prio_key]) { 1025 key_val->vlan_priority = 1026 nla_get_u8(tb[vlan_prio_key]) & 1027 VLAN_PRIORITY_MASK; 1028 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1029 } 1030 if (ethertype) { 1031 key_val->vlan_tpid = ethertype; 1032 key_mask->vlan_tpid = cpu_to_be16(~0); 1033 } 1034 if (tb[vlan_next_eth_type_key]) { 1035 key_val->vlan_eth_type = 1036 nla_get_be16(tb[vlan_next_eth_type_key]); 1037 key_mask->vlan_eth_type = cpu_to_be16(~0); 1038 } 1039 } 1040 1041 static void fl_set_key_pppoe(struct nlattr **tb, 1042 struct flow_dissector_key_pppoe *key_val, 1043 struct flow_dissector_key_pppoe *key_mask, 1044 struct fl_flow_key *key, 1045 struct fl_flow_key *mask) 1046 { 1047 /* key_val::type must be set to ETH_P_PPP_SES 1048 * because ETH_P_PPP_SES was stored in basic.n_proto 1049 * which might get overwritten by ppp_proto 1050 * or might be set to 0, the role of key_val::type 1051 * is simmilar to vlan_key::tpid 1052 */ 1053 key_val->type = htons(ETH_P_PPP_SES); 1054 key_mask->type = cpu_to_be16(~0); 1055 1056 if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { 1057 key_val->session_id = 1058 nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); 1059 key_mask->session_id = cpu_to_be16(~0); 1060 } 1061 if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { 1062 key_val->ppp_proto = 1063 nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); 1064 key_mask->ppp_proto = cpu_to_be16(~0); 1065 1066 if (key_val->ppp_proto == htons(PPP_IP)) { 1067 key->basic.n_proto = htons(ETH_P_IP); 1068 mask->basic.n_proto = cpu_to_be16(~0); 1069 } else if (key_val->ppp_proto == htons(PPP_IPV6)) { 1070 key->basic.n_proto = htons(ETH_P_IPV6); 1071 mask->basic.n_proto = cpu_to_be16(~0); 1072 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { 1073 key->basic.n_proto = htons(ETH_P_MPLS_UC); 1074 mask->basic.n_proto = cpu_to_be16(~0); 1075 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { 1076 key->basic.n_proto = htons(ETH_P_MPLS_MC); 1077 mask->basic.n_proto = cpu_to_be16(~0); 1078 } 1079 } else { 1080 key->basic.n_proto = 0; 1081 mask->basic.n_proto = cpu_to_be16(0); 1082 } 1083 } 1084 1085 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1086 u32 *dissector_key, u32 *dissector_mask, 1087 u32 flower_flag_bit, u32 dissector_flag_bit) 1088 { 1089 if (flower_mask & flower_flag_bit) { 1090 *dissector_mask |= dissector_flag_bit; 1091 if (flower_key & flower_flag_bit) 1092 *dissector_key |= dissector_flag_bit; 1093 } 1094 } 1095 1096 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1097 u32 *flags_mask, struct netlink_ext_ack *extack) 1098 { 1099 u32 key, mask; 1100 1101 /* mask is mandatory for flags */ 1102 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1103 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1104 return -EINVAL; 1105 } 1106 1107 key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS])); 1108 mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1109 1110 *flags_key = 0; 1111 *flags_mask = 0; 1112 1113 fl_set_key_flag(key, mask, flags_key, flags_mask, 1114 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1115 fl_set_key_flag(key, mask, flags_key, flags_mask, 1116 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1117 FLOW_DIS_FIRST_FRAG); 1118 1119 return 0; 1120 } 1121 1122 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1123 struct flow_dissector_key_ip *key, 1124 struct flow_dissector_key_ip *mask) 1125 { 1126 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1127 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1128 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1129 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1130 1131 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1132 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1133 } 1134 1135 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1136 int depth, int option_len, 1137 struct netlink_ext_ack *extack) 1138 { 1139 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1140 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1141 struct geneve_opt *opt; 1142 int err, data_len = 0; 1143 1144 if (option_len > sizeof(struct geneve_opt)) 1145 data_len = option_len - sizeof(struct geneve_opt); 1146 1147 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1148 memset(opt, 0xff, option_len); 1149 opt->length = data_len / 4; 1150 opt->r1 = 0; 1151 opt->r2 = 0; 1152 opt->r3 = 0; 1153 1154 /* If no mask has been prodived we assume an exact match. */ 1155 if (!depth) 1156 return sizeof(struct geneve_opt) + data_len; 1157 1158 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1159 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1160 return -EINVAL; 1161 } 1162 1163 err = nla_parse_nested_deprecated(tb, 1164 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1165 nla, geneve_opt_policy, extack); 1166 if (err < 0) 1167 return err; 1168 1169 /* We are not allowed to omit any of CLASS, TYPE or DATA 1170 * fields from the key. 1171 */ 1172 if (!option_len && 1173 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1174 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1175 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1176 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1177 return -EINVAL; 1178 } 1179 1180 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1181 * for the mask. 1182 */ 1183 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1184 int new_len = key->enc_opts.len; 1185 1186 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1187 data_len = nla_len(data); 1188 if (data_len < 4) { 1189 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1190 return -ERANGE; 1191 } 1192 if (data_len % 4) { 1193 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1194 return -ERANGE; 1195 } 1196 1197 new_len += sizeof(struct geneve_opt) + data_len; 1198 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1199 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1200 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1201 return -ERANGE; 1202 } 1203 opt->length = data_len / 4; 1204 memcpy(opt->opt_data, nla_data(data), data_len); 1205 } 1206 1207 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1208 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1209 opt->opt_class = nla_get_be16(class); 1210 } 1211 1212 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1213 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1214 opt->type = nla_get_u8(type); 1215 } 1216 1217 return sizeof(struct geneve_opt) + data_len; 1218 } 1219 1220 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1221 int depth, int option_len, 1222 struct netlink_ext_ack *extack) 1223 { 1224 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1225 struct vxlan_metadata *md; 1226 int err; 1227 1228 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1229 memset(md, 0xff, sizeof(*md)); 1230 1231 if (!depth) 1232 return sizeof(*md); 1233 1234 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1235 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1236 return -EINVAL; 1237 } 1238 1239 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1240 vxlan_opt_policy, extack); 1241 if (err < 0) 1242 return err; 1243 1244 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1245 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1246 return -EINVAL; 1247 } 1248 1249 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1250 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1251 md->gbp &= VXLAN_GBP_MASK; 1252 } 1253 1254 return sizeof(*md); 1255 } 1256 1257 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1258 int depth, int option_len, 1259 struct netlink_ext_ack *extack) 1260 { 1261 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1262 struct erspan_metadata *md; 1263 int err; 1264 1265 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1266 memset(md, 0xff, sizeof(*md)); 1267 md->version = 1; 1268 1269 if (!depth) 1270 return sizeof(*md); 1271 1272 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1273 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1274 return -EINVAL; 1275 } 1276 1277 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1278 erspan_opt_policy, extack); 1279 if (err < 0) 1280 return err; 1281 1282 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1283 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1284 return -EINVAL; 1285 } 1286 1287 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1288 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1289 1290 if (md->version == 1) { 1291 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1292 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1293 return -EINVAL; 1294 } 1295 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1296 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1297 memset(&md->u, 0x00, sizeof(md->u)); 1298 md->u.index = nla_get_be32(nla); 1299 } 1300 } else if (md->version == 2) { 1301 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1302 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1303 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1304 return -EINVAL; 1305 } 1306 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1307 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1308 md->u.md2.dir = nla_get_u8(nla); 1309 } 1310 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1311 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1312 set_hwid(&md->u.md2, nla_get_u8(nla)); 1313 } 1314 } else { 1315 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1316 return -EINVAL; 1317 } 1318 1319 return sizeof(*md); 1320 } 1321 1322 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1323 int depth, int option_len, 1324 struct netlink_ext_ack *extack) 1325 { 1326 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1327 struct gtp_pdu_session_info *sinfo; 1328 u8 len = key->enc_opts.len; 1329 int err; 1330 1331 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1332 memset(sinfo, 0xff, option_len); 1333 1334 if (!depth) 1335 return sizeof(*sinfo); 1336 1337 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1338 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1339 return -EINVAL; 1340 } 1341 1342 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1343 gtp_opt_policy, extack); 1344 if (err < 0) 1345 return err; 1346 1347 if (!option_len && 1348 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1349 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1350 NL_SET_ERR_MSG_MOD(extack, 1351 "Missing tunnel key gtp option pdu type or qfi"); 1352 return -EINVAL; 1353 } 1354 1355 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1356 sinfo->pdu_type = 1357 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1358 1359 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1360 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1361 1362 return sizeof(*sinfo); 1363 } 1364 1365 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1366 struct fl_flow_key *mask, 1367 struct netlink_ext_ack *extack) 1368 { 1369 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1370 int err, option_len, key_depth, msk_depth = 0; 1371 1372 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1373 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1374 enc_opts_policy, extack); 1375 if (err) 1376 return err; 1377 1378 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1379 1380 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1381 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1382 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1383 enc_opts_policy, extack); 1384 if (err) 1385 return err; 1386 1387 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1388 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1389 if (!nla_ok(nla_opt_msk, msk_depth)) { 1390 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1391 return -EINVAL; 1392 } 1393 } 1394 1395 nla_for_each_attr(nla_opt_key, nla_enc_key, 1396 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1397 switch (nla_type(nla_opt_key)) { 1398 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1399 if (key->enc_opts.dst_opt_type && 1400 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1401 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1402 return -EINVAL; 1403 } 1404 option_len = 0; 1405 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1406 option_len = fl_set_geneve_opt(nla_opt_key, key, 1407 key_depth, option_len, 1408 extack); 1409 if (option_len < 0) 1410 return option_len; 1411 1412 key->enc_opts.len += option_len; 1413 /* At the same time we need to parse through the mask 1414 * in order to verify exact and mask attribute lengths. 1415 */ 1416 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1417 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1418 msk_depth, option_len, 1419 extack); 1420 if (option_len < 0) 1421 return option_len; 1422 1423 mask->enc_opts.len += option_len; 1424 if (key->enc_opts.len != mask->enc_opts.len) { 1425 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1426 return -EINVAL; 1427 } 1428 break; 1429 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1430 if (key->enc_opts.dst_opt_type) { 1431 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1432 return -EINVAL; 1433 } 1434 option_len = 0; 1435 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1436 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1437 key_depth, option_len, 1438 extack); 1439 if (option_len < 0) 1440 return option_len; 1441 1442 key->enc_opts.len += option_len; 1443 /* At the same time we need to parse through the mask 1444 * in order to verify exact and mask attribute lengths. 1445 */ 1446 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1447 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1448 msk_depth, option_len, 1449 extack); 1450 if (option_len < 0) 1451 return option_len; 1452 1453 mask->enc_opts.len += option_len; 1454 if (key->enc_opts.len != mask->enc_opts.len) { 1455 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1456 return -EINVAL; 1457 } 1458 break; 1459 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1460 if (key->enc_opts.dst_opt_type) { 1461 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1462 return -EINVAL; 1463 } 1464 option_len = 0; 1465 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1466 option_len = fl_set_erspan_opt(nla_opt_key, key, 1467 key_depth, option_len, 1468 extack); 1469 if (option_len < 0) 1470 return option_len; 1471 1472 key->enc_opts.len += option_len; 1473 /* At the same time we need to parse through the mask 1474 * in order to verify exact and mask attribute lengths. 1475 */ 1476 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1477 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1478 msk_depth, option_len, 1479 extack); 1480 if (option_len < 0) 1481 return option_len; 1482 1483 mask->enc_opts.len += option_len; 1484 if (key->enc_opts.len != mask->enc_opts.len) { 1485 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1486 return -EINVAL; 1487 } 1488 break; 1489 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1490 if (key->enc_opts.dst_opt_type) { 1491 NL_SET_ERR_MSG_MOD(extack, 1492 "Duplicate type for gtp options"); 1493 return -EINVAL; 1494 } 1495 option_len = 0; 1496 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1497 option_len = fl_set_gtp_opt(nla_opt_key, key, 1498 key_depth, option_len, 1499 extack); 1500 if (option_len < 0) 1501 return option_len; 1502 1503 key->enc_opts.len += option_len; 1504 /* At the same time we need to parse through the mask 1505 * in order to verify exact and mask attribute lengths. 1506 */ 1507 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1508 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1509 msk_depth, option_len, 1510 extack); 1511 if (option_len < 0) 1512 return option_len; 1513 1514 mask->enc_opts.len += option_len; 1515 if (key->enc_opts.len != mask->enc_opts.len) { 1516 NL_SET_ERR_MSG_MOD(extack, 1517 "Key and mask miss aligned"); 1518 return -EINVAL; 1519 } 1520 break; 1521 default: 1522 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1523 return -EINVAL; 1524 } 1525 1526 if (!msk_depth) 1527 continue; 1528 1529 if (!nla_ok(nla_opt_msk, msk_depth)) { 1530 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1531 return -EINVAL; 1532 } 1533 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1534 } 1535 1536 return 0; 1537 } 1538 1539 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1540 struct netlink_ext_ack *extack) 1541 { 1542 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1543 NL_SET_ERR_MSG_ATTR(extack, tb, 1544 "no trk, so no other flag can be set"); 1545 return -EINVAL; 1546 } 1547 1548 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1549 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1550 NL_SET_ERR_MSG_ATTR(extack, tb, 1551 "new and est are mutually exclusive"); 1552 return -EINVAL; 1553 } 1554 1555 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1556 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1557 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1558 NL_SET_ERR_MSG_ATTR(extack, tb, 1559 "when inv is set, only trk may be set"); 1560 return -EINVAL; 1561 } 1562 1563 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1564 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1565 NL_SET_ERR_MSG_ATTR(extack, tb, 1566 "new and rpl are mutually exclusive"); 1567 return -EINVAL; 1568 } 1569 1570 return 0; 1571 } 1572 1573 static int fl_set_key_ct(struct nlattr **tb, 1574 struct flow_dissector_key_ct *key, 1575 struct flow_dissector_key_ct *mask, 1576 struct netlink_ext_ack *extack) 1577 { 1578 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1579 int err; 1580 1581 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1582 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1583 return -EOPNOTSUPP; 1584 } 1585 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1586 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1587 sizeof(key->ct_state)); 1588 1589 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1590 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1591 extack); 1592 if (err) 1593 return err; 1594 1595 } 1596 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1597 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1598 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1599 return -EOPNOTSUPP; 1600 } 1601 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1602 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1603 sizeof(key->ct_zone)); 1604 } 1605 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1606 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1607 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1608 return -EOPNOTSUPP; 1609 } 1610 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1611 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1612 sizeof(key->ct_mark)); 1613 } 1614 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1615 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1616 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1617 return -EOPNOTSUPP; 1618 } 1619 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1620 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1621 sizeof(key->ct_labels)); 1622 } 1623 1624 return 0; 1625 } 1626 1627 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1628 struct fl_flow_key *key, struct fl_flow_key *mask, 1629 int vthresh) 1630 { 1631 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1632 1633 if (!tb) { 1634 *ethertype = 0; 1635 return good_num_of_vlans; 1636 } 1637 1638 *ethertype = nla_get_be16(tb); 1639 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1640 return true; 1641 1642 key->basic.n_proto = *ethertype; 1643 mask->basic.n_proto = cpu_to_be16(~0); 1644 return false; 1645 } 1646 1647 static int fl_set_key(struct net *net, struct nlattr **tb, 1648 struct fl_flow_key *key, struct fl_flow_key *mask, 1649 struct netlink_ext_ack *extack) 1650 { 1651 __be16 ethertype; 1652 int ret = 0; 1653 1654 if (tb[TCA_FLOWER_INDEV]) { 1655 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1656 if (err < 0) 1657 return err; 1658 key->meta.ingress_ifindex = err; 1659 mask->meta.ingress_ifindex = 0xffffffff; 1660 } 1661 1662 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1663 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1664 sizeof(key->eth.dst)); 1665 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1666 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1667 sizeof(key->eth.src)); 1668 fl_set_key_val(tb, &key->num_of_vlans, 1669 TCA_FLOWER_KEY_NUM_OF_VLANS, 1670 &mask->num_of_vlans, 1671 TCA_FLOWER_UNSPEC, 1672 sizeof(key->num_of_vlans)); 1673 1674 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1675 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1676 TCA_FLOWER_KEY_VLAN_PRIO, 1677 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1678 &key->vlan, &mask->vlan); 1679 1680 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1681 ðertype, key, mask, 1)) { 1682 fl_set_key_vlan(tb, ethertype, 1683 TCA_FLOWER_KEY_CVLAN_ID, 1684 TCA_FLOWER_KEY_CVLAN_PRIO, 1685 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1686 &key->cvlan, &mask->cvlan); 1687 fl_set_key_val(tb, &key->basic.n_proto, 1688 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1689 &mask->basic.n_proto, 1690 TCA_FLOWER_UNSPEC, 1691 sizeof(key->basic.n_proto)); 1692 } 1693 } 1694 1695 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1696 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1697 1698 if (key->basic.n_proto == htons(ETH_P_IP) || 1699 key->basic.n_proto == htons(ETH_P_IPV6)) { 1700 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1701 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1702 sizeof(key->basic.ip_proto)); 1703 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1704 } 1705 1706 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1707 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1708 mask->control.addr_type = ~0; 1709 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1710 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1711 sizeof(key->ipv4.src)); 1712 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1713 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1714 sizeof(key->ipv4.dst)); 1715 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1716 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1717 mask->control.addr_type = ~0; 1718 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1719 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1720 sizeof(key->ipv6.src)); 1721 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1722 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1723 sizeof(key->ipv6.dst)); 1724 } 1725 1726 if (key->basic.ip_proto == IPPROTO_TCP) { 1727 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1728 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1729 sizeof(key->tp.src)); 1730 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1731 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1732 sizeof(key->tp.dst)); 1733 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1734 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1735 sizeof(key->tcp.flags)); 1736 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1737 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1738 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1739 sizeof(key->tp.src)); 1740 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1741 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1742 sizeof(key->tp.dst)); 1743 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1744 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1745 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1746 sizeof(key->tp.src)); 1747 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1748 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1749 sizeof(key->tp.dst)); 1750 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1751 key->basic.ip_proto == IPPROTO_ICMP) { 1752 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1753 &mask->icmp.type, 1754 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1755 sizeof(key->icmp.type)); 1756 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1757 &mask->icmp.code, 1758 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1759 sizeof(key->icmp.code)); 1760 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1761 key->basic.ip_proto == IPPROTO_ICMPV6) { 1762 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1763 &mask->icmp.type, 1764 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1765 sizeof(key->icmp.type)); 1766 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1767 &mask->icmp.code, 1768 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1769 sizeof(key->icmp.code)); 1770 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1771 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1772 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1773 if (ret) 1774 return ret; 1775 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1776 key->basic.n_proto == htons(ETH_P_RARP)) { 1777 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1778 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1779 sizeof(key->arp.sip)); 1780 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1781 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1782 sizeof(key->arp.tip)); 1783 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1784 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1785 sizeof(key->arp.op)); 1786 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1787 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1788 sizeof(key->arp.sha)); 1789 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1790 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1791 sizeof(key->arp.tha)); 1792 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 1793 fl_set_key_val(tb, &key->l2tpv3.session_id, 1794 TCA_FLOWER_KEY_L2TPV3_SID, 1795 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 1796 sizeof(key->l2tpv3.session_id)); 1797 } 1798 1799 if (key->basic.ip_proto == IPPROTO_TCP || 1800 key->basic.ip_proto == IPPROTO_UDP || 1801 key->basic.ip_proto == IPPROTO_SCTP) { 1802 ret = fl_set_key_port_range(tb, key, mask, extack); 1803 if (ret) 1804 return ret; 1805 } 1806 1807 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1808 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1809 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1810 mask->enc_control.addr_type = ~0; 1811 fl_set_key_val(tb, &key->enc_ipv4.src, 1812 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1813 &mask->enc_ipv4.src, 1814 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1815 sizeof(key->enc_ipv4.src)); 1816 fl_set_key_val(tb, &key->enc_ipv4.dst, 1817 TCA_FLOWER_KEY_ENC_IPV4_DST, 1818 &mask->enc_ipv4.dst, 1819 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1820 sizeof(key->enc_ipv4.dst)); 1821 } 1822 1823 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1824 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1825 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1826 mask->enc_control.addr_type = ~0; 1827 fl_set_key_val(tb, &key->enc_ipv6.src, 1828 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1829 &mask->enc_ipv6.src, 1830 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1831 sizeof(key->enc_ipv6.src)); 1832 fl_set_key_val(tb, &key->enc_ipv6.dst, 1833 TCA_FLOWER_KEY_ENC_IPV6_DST, 1834 &mask->enc_ipv6.dst, 1835 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1836 sizeof(key->enc_ipv6.dst)); 1837 } 1838 1839 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1840 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1841 sizeof(key->enc_key_id.keyid)); 1842 1843 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1844 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1845 sizeof(key->enc_tp.src)); 1846 1847 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1848 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1849 sizeof(key->enc_tp.dst)); 1850 1851 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1852 1853 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1854 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1855 sizeof(key->hash.hash)); 1856 1857 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1858 ret = fl_set_enc_opt(tb, key, mask, extack); 1859 if (ret) 1860 return ret; 1861 } 1862 1863 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1864 if (ret) 1865 return ret; 1866 1867 if (tb[TCA_FLOWER_KEY_FLAGS]) 1868 ret = fl_set_key_flags(tb, &key->control.flags, 1869 &mask->control.flags, extack); 1870 1871 return ret; 1872 } 1873 1874 static void fl_mask_copy(struct fl_flow_mask *dst, 1875 struct fl_flow_mask *src) 1876 { 1877 const void *psrc = fl_key_get_start(&src->key, src); 1878 void *pdst = fl_key_get_start(&dst->key, src); 1879 1880 memcpy(pdst, psrc, fl_mask_range(src)); 1881 dst->range = src->range; 1882 } 1883 1884 static const struct rhashtable_params fl_ht_params = { 1885 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1886 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1887 .automatic_shrinking = true, 1888 }; 1889 1890 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1891 { 1892 mask->filter_ht_params = fl_ht_params; 1893 mask->filter_ht_params.key_len = fl_mask_range(mask); 1894 mask->filter_ht_params.key_offset += mask->range.start; 1895 1896 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1897 } 1898 1899 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1900 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1901 1902 #define FL_KEY_IS_MASKED(mask, member) \ 1903 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1904 0, FL_KEY_MEMBER_SIZE(member)) \ 1905 1906 #define FL_KEY_SET(keys, cnt, id, member) \ 1907 do { \ 1908 keys[cnt].key_id = id; \ 1909 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1910 cnt++; \ 1911 } while(0); 1912 1913 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1914 do { \ 1915 if (FL_KEY_IS_MASKED(mask, member)) \ 1916 FL_KEY_SET(keys, cnt, id, member); \ 1917 } while(0); 1918 1919 static void fl_init_dissector(struct flow_dissector *dissector, 1920 struct fl_flow_key *mask) 1921 { 1922 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1923 size_t cnt = 0; 1924 1925 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1926 FLOW_DISSECTOR_KEY_META, meta); 1927 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1928 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1929 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1930 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1931 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1932 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1933 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1934 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1935 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1936 FLOW_DISSECTOR_KEY_PORTS, tp); 1937 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1938 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1939 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1940 FLOW_DISSECTOR_KEY_IP, ip); 1941 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1942 FLOW_DISSECTOR_KEY_TCP, tcp); 1943 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1944 FLOW_DISSECTOR_KEY_ICMP, icmp); 1945 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1946 FLOW_DISSECTOR_KEY_ARP, arp); 1947 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1948 FLOW_DISSECTOR_KEY_MPLS, mpls); 1949 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1950 FLOW_DISSECTOR_KEY_VLAN, vlan); 1951 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1952 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1953 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1954 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1955 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1956 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1957 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1958 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1959 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1960 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1961 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1962 enc_control); 1963 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1964 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1965 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1966 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1967 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1968 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1969 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1970 FLOW_DISSECTOR_KEY_CT, ct); 1971 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1972 FLOW_DISSECTOR_KEY_HASH, hash); 1973 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1974 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 1975 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1976 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 1977 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1978 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 1979 1980 skb_flow_dissector_init(dissector, keys, cnt); 1981 } 1982 1983 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1984 struct fl_flow_mask *mask) 1985 { 1986 struct fl_flow_mask *newmask; 1987 int err; 1988 1989 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1990 if (!newmask) 1991 return ERR_PTR(-ENOMEM); 1992 1993 fl_mask_copy(newmask, mask); 1994 1995 if ((newmask->key.tp_range.tp_min.dst && 1996 newmask->key.tp_range.tp_max.dst) || 1997 (newmask->key.tp_range.tp_min.src && 1998 newmask->key.tp_range.tp_max.src)) 1999 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2000 2001 err = fl_init_mask_hashtable(newmask); 2002 if (err) 2003 goto errout_free; 2004 2005 fl_init_dissector(&newmask->dissector, &newmask->key); 2006 2007 INIT_LIST_HEAD_RCU(&newmask->filters); 2008 2009 refcount_set(&newmask->refcnt, 1); 2010 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2011 &newmask->ht_node, mask_ht_params); 2012 if (err) 2013 goto errout_destroy; 2014 2015 spin_lock(&head->masks_lock); 2016 list_add_tail_rcu(&newmask->list, &head->masks); 2017 spin_unlock(&head->masks_lock); 2018 2019 return newmask; 2020 2021 errout_destroy: 2022 rhashtable_destroy(&newmask->ht); 2023 errout_free: 2024 kfree(newmask); 2025 2026 return ERR_PTR(err); 2027 } 2028 2029 static int fl_check_assign_mask(struct cls_fl_head *head, 2030 struct cls_fl_filter *fnew, 2031 struct cls_fl_filter *fold, 2032 struct fl_flow_mask *mask) 2033 { 2034 struct fl_flow_mask *newmask; 2035 int ret = 0; 2036 2037 rcu_read_lock(); 2038 2039 /* Insert mask as temporary node to prevent concurrent creation of mask 2040 * with same key. Any concurrent lookups with same key will return 2041 * -EAGAIN because mask's refcnt is zero. 2042 */ 2043 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2044 &mask->ht_node, 2045 mask_ht_params); 2046 if (!fnew->mask) { 2047 rcu_read_unlock(); 2048 2049 if (fold) { 2050 ret = -EINVAL; 2051 goto errout_cleanup; 2052 } 2053 2054 newmask = fl_create_new_mask(head, mask); 2055 if (IS_ERR(newmask)) { 2056 ret = PTR_ERR(newmask); 2057 goto errout_cleanup; 2058 } 2059 2060 fnew->mask = newmask; 2061 return 0; 2062 } else if (IS_ERR(fnew->mask)) { 2063 ret = PTR_ERR(fnew->mask); 2064 } else if (fold && fold->mask != fnew->mask) { 2065 ret = -EINVAL; 2066 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2067 /* Mask was deleted concurrently, try again */ 2068 ret = -EAGAIN; 2069 } 2070 rcu_read_unlock(); 2071 return ret; 2072 2073 errout_cleanup: 2074 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2075 mask_ht_params); 2076 return ret; 2077 } 2078 2079 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 2080 struct cls_fl_filter *f, struct fl_flow_mask *mask, 2081 unsigned long base, struct nlattr **tb, 2082 struct nlattr *est, 2083 struct fl_flow_tmplt *tmplt, 2084 u32 flags, u32 fl_flags, 2085 struct netlink_ext_ack *extack) 2086 { 2087 int err; 2088 2089 err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags, 2090 fl_flags, extack); 2091 if (err < 0) 2092 return err; 2093 2094 if (tb[TCA_FLOWER_CLASSID]) { 2095 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2096 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2097 rtnl_lock(); 2098 tcf_bind_filter(tp, &f->res, base); 2099 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2100 rtnl_unlock(); 2101 } 2102 2103 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 2104 if (err) 2105 return err; 2106 2107 fl_mask_update_range(mask); 2108 fl_set_masked_key(&f->mkey, &f->key, mask); 2109 2110 if (!fl_mask_fits_tmplt(tmplt, mask)) { 2111 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2112 return -EINVAL; 2113 } 2114 2115 return 0; 2116 } 2117 2118 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2119 struct cls_fl_filter *fold, 2120 bool *in_ht) 2121 { 2122 struct fl_flow_mask *mask = fnew->mask; 2123 int err; 2124 2125 err = rhashtable_lookup_insert_fast(&mask->ht, 2126 &fnew->ht_node, 2127 mask->filter_ht_params); 2128 if (err) { 2129 *in_ht = false; 2130 /* It is okay if filter with same key exists when 2131 * overwriting. 2132 */ 2133 return fold && err == -EEXIST ? 0 : err; 2134 } 2135 2136 *in_ht = true; 2137 return 0; 2138 } 2139 2140 static int fl_change(struct net *net, struct sk_buff *in_skb, 2141 struct tcf_proto *tp, unsigned long base, 2142 u32 handle, struct nlattr **tca, 2143 void **arg, u32 flags, 2144 struct netlink_ext_ack *extack) 2145 { 2146 struct cls_fl_head *head = fl_head_dereference(tp); 2147 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2148 struct cls_fl_filter *fold = *arg; 2149 struct cls_fl_filter *fnew; 2150 struct fl_flow_mask *mask; 2151 struct nlattr **tb; 2152 bool in_ht; 2153 int err; 2154 2155 if (!tca[TCA_OPTIONS]) { 2156 err = -EINVAL; 2157 goto errout_fold; 2158 } 2159 2160 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2161 if (!mask) { 2162 err = -ENOBUFS; 2163 goto errout_fold; 2164 } 2165 2166 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2167 if (!tb) { 2168 err = -ENOBUFS; 2169 goto errout_mask_alloc; 2170 } 2171 2172 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2173 tca[TCA_OPTIONS], fl_policy, NULL); 2174 if (err < 0) 2175 goto errout_tb; 2176 2177 if (fold && handle && fold->handle != handle) { 2178 err = -EINVAL; 2179 goto errout_tb; 2180 } 2181 2182 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2183 if (!fnew) { 2184 err = -ENOBUFS; 2185 goto errout_tb; 2186 } 2187 INIT_LIST_HEAD(&fnew->hw_list); 2188 refcount_set(&fnew->refcnt, 1); 2189 2190 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 2191 if (err < 0) 2192 goto errout; 2193 2194 if (tb[TCA_FLOWER_FLAGS]) { 2195 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2196 2197 if (!tc_flags_valid(fnew->flags)) { 2198 err = -EINVAL; 2199 goto errout; 2200 } 2201 } 2202 2203 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], 2204 tp->chain->tmplt_priv, flags, fnew->flags, 2205 extack); 2206 if (err) 2207 goto errout; 2208 2209 err = fl_check_assign_mask(head, fnew, fold, mask); 2210 if (err) 2211 goto errout; 2212 2213 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2214 if (err) 2215 goto errout_mask; 2216 2217 if (!tc_skip_hw(fnew->flags)) { 2218 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2219 if (err) 2220 goto errout_ht; 2221 } 2222 2223 if (!tc_in_hw(fnew->flags)) 2224 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2225 2226 spin_lock(&tp->lock); 2227 2228 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2229 * proto again or create new one, if necessary. 2230 */ 2231 if (tp->deleting) { 2232 err = -EAGAIN; 2233 goto errout_hw; 2234 } 2235 2236 if (fold) { 2237 /* Fold filter was deleted concurrently. Retry lookup. */ 2238 if (fold->deleted) { 2239 err = -EAGAIN; 2240 goto errout_hw; 2241 } 2242 2243 fnew->handle = handle; 2244 2245 if (!in_ht) { 2246 struct rhashtable_params params = 2247 fnew->mask->filter_ht_params; 2248 2249 err = rhashtable_insert_fast(&fnew->mask->ht, 2250 &fnew->ht_node, 2251 params); 2252 if (err) 2253 goto errout_hw; 2254 in_ht = true; 2255 } 2256 2257 refcount_inc(&fnew->refcnt); 2258 rhashtable_remove_fast(&fold->mask->ht, 2259 &fold->ht_node, 2260 fold->mask->filter_ht_params); 2261 idr_replace(&head->handle_idr, fnew, fnew->handle); 2262 list_replace_rcu(&fold->list, &fnew->list); 2263 fold->deleted = true; 2264 2265 spin_unlock(&tp->lock); 2266 2267 fl_mask_put(head, fold->mask); 2268 if (!tc_skip_hw(fold->flags)) 2269 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2270 tcf_unbind_filter(tp, &fold->res); 2271 /* Caller holds reference to fold, so refcnt is always > 0 2272 * after this. 2273 */ 2274 refcount_dec(&fold->refcnt); 2275 __fl_put(fold); 2276 } else { 2277 if (handle) { 2278 /* user specifies a handle and it doesn't exist */ 2279 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2280 handle, GFP_ATOMIC); 2281 2282 /* Filter with specified handle was concurrently 2283 * inserted after initial check in cls_api. This is not 2284 * necessarily an error if NLM_F_EXCL is not set in 2285 * message flags. Returning EAGAIN will cause cls_api to 2286 * try to update concurrently inserted rule. 2287 */ 2288 if (err == -ENOSPC) 2289 err = -EAGAIN; 2290 } else { 2291 handle = 1; 2292 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2293 INT_MAX, GFP_ATOMIC); 2294 } 2295 if (err) 2296 goto errout_hw; 2297 2298 refcount_inc(&fnew->refcnt); 2299 fnew->handle = handle; 2300 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2301 spin_unlock(&tp->lock); 2302 } 2303 2304 *arg = fnew; 2305 2306 kfree(tb); 2307 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2308 return 0; 2309 2310 errout_ht: 2311 spin_lock(&tp->lock); 2312 errout_hw: 2313 fnew->deleted = true; 2314 spin_unlock(&tp->lock); 2315 if (!tc_skip_hw(fnew->flags)) 2316 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2317 if (in_ht) 2318 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2319 fnew->mask->filter_ht_params); 2320 errout_mask: 2321 fl_mask_put(head, fnew->mask); 2322 errout: 2323 __fl_put(fnew); 2324 errout_tb: 2325 kfree(tb); 2326 errout_mask_alloc: 2327 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2328 errout_fold: 2329 if (fold) 2330 __fl_put(fold); 2331 return err; 2332 } 2333 2334 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2335 bool rtnl_held, struct netlink_ext_ack *extack) 2336 { 2337 struct cls_fl_head *head = fl_head_dereference(tp); 2338 struct cls_fl_filter *f = arg; 2339 bool last_on_mask; 2340 int err = 0; 2341 2342 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2343 *last = list_empty(&head->masks); 2344 __fl_put(f); 2345 2346 return err; 2347 } 2348 2349 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2350 bool rtnl_held) 2351 { 2352 struct cls_fl_head *head = fl_head_dereference(tp); 2353 unsigned long id = arg->cookie, tmp; 2354 struct cls_fl_filter *f; 2355 2356 arg->count = arg->skip; 2357 2358 rcu_read_lock(); 2359 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2360 /* don't return filters that are being deleted */ 2361 if (!refcount_inc_not_zero(&f->refcnt)) 2362 continue; 2363 rcu_read_unlock(); 2364 2365 if (arg->fn(tp, f, arg) < 0) { 2366 __fl_put(f); 2367 arg->stop = 1; 2368 rcu_read_lock(); 2369 break; 2370 } 2371 __fl_put(f); 2372 arg->count++; 2373 rcu_read_lock(); 2374 } 2375 rcu_read_unlock(); 2376 arg->cookie = id; 2377 } 2378 2379 static struct cls_fl_filter * 2380 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2381 { 2382 struct cls_fl_head *head = fl_head_dereference(tp); 2383 2384 spin_lock(&tp->lock); 2385 if (list_empty(&head->hw_filters)) { 2386 spin_unlock(&tp->lock); 2387 return NULL; 2388 } 2389 2390 if (!f) 2391 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2392 hw_list); 2393 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2394 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2395 spin_unlock(&tp->lock); 2396 return f; 2397 } 2398 } 2399 2400 spin_unlock(&tp->lock); 2401 return NULL; 2402 } 2403 2404 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2405 void *cb_priv, struct netlink_ext_ack *extack) 2406 { 2407 struct tcf_block *block = tp->chain->block; 2408 struct flow_cls_offload cls_flower = {}; 2409 struct cls_fl_filter *f = NULL; 2410 int err; 2411 2412 /* hw_filters list can only be changed by hw offload functions after 2413 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2414 * iterating it. 2415 */ 2416 ASSERT_RTNL(); 2417 2418 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2419 cls_flower.rule = 2420 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2421 if (!cls_flower.rule) { 2422 __fl_put(f); 2423 return -ENOMEM; 2424 } 2425 2426 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2427 extack); 2428 cls_flower.command = add ? 2429 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2430 cls_flower.cookie = (unsigned long)f; 2431 cls_flower.rule->match.dissector = &f->mask->dissector; 2432 cls_flower.rule->match.mask = &f->mask->key; 2433 cls_flower.rule->match.key = &f->mkey; 2434 2435 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2436 cls_flower.common.extack); 2437 if (err) { 2438 kfree(cls_flower.rule); 2439 if (tc_skip_sw(f->flags)) { 2440 __fl_put(f); 2441 return err; 2442 } 2443 goto next_flow; 2444 } 2445 2446 cls_flower.classid = f->res.classid; 2447 2448 err = tc_setup_cb_reoffload(block, tp, add, cb, 2449 TC_SETUP_CLSFLOWER, &cls_flower, 2450 cb_priv, &f->flags, 2451 &f->in_hw_count); 2452 tc_cleanup_offload_action(&cls_flower.rule->action); 2453 kfree(cls_flower.rule); 2454 2455 if (err) { 2456 __fl_put(f); 2457 return err; 2458 } 2459 next_flow: 2460 __fl_put(f); 2461 } 2462 2463 return 0; 2464 } 2465 2466 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2467 { 2468 struct flow_cls_offload *cls_flower = type_data; 2469 struct cls_fl_filter *f = 2470 (struct cls_fl_filter *) cls_flower->cookie; 2471 struct cls_fl_head *head = fl_head_dereference(tp); 2472 2473 spin_lock(&tp->lock); 2474 list_add(&f->hw_list, &head->hw_filters); 2475 spin_unlock(&tp->lock); 2476 } 2477 2478 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2479 { 2480 struct flow_cls_offload *cls_flower = type_data; 2481 struct cls_fl_filter *f = 2482 (struct cls_fl_filter *) cls_flower->cookie; 2483 2484 spin_lock(&tp->lock); 2485 if (!list_empty(&f->hw_list)) 2486 list_del_init(&f->hw_list); 2487 spin_unlock(&tp->lock); 2488 } 2489 2490 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2491 struct fl_flow_tmplt *tmplt) 2492 { 2493 struct flow_cls_offload cls_flower = {}; 2494 struct tcf_block *block = chain->block; 2495 2496 cls_flower.rule = flow_rule_alloc(0); 2497 if (!cls_flower.rule) 2498 return -ENOMEM; 2499 2500 cls_flower.common.chain_index = chain->index; 2501 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2502 cls_flower.cookie = (unsigned long) tmplt; 2503 cls_flower.rule->match.dissector = &tmplt->dissector; 2504 cls_flower.rule->match.mask = &tmplt->mask; 2505 cls_flower.rule->match.key = &tmplt->dummy_key; 2506 2507 /* We don't care if driver (any of them) fails to handle this 2508 * call. It serves just as a hint for it. 2509 */ 2510 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2511 kfree(cls_flower.rule); 2512 2513 return 0; 2514 } 2515 2516 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2517 struct fl_flow_tmplt *tmplt) 2518 { 2519 struct flow_cls_offload cls_flower = {}; 2520 struct tcf_block *block = chain->block; 2521 2522 cls_flower.common.chain_index = chain->index; 2523 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2524 cls_flower.cookie = (unsigned long) tmplt; 2525 2526 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2527 } 2528 2529 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2530 struct nlattr **tca, 2531 struct netlink_ext_ack *extack) 2532 { 2533 struct fl_flow_tmplt *tmplt; 2534 struct nlattr **tb; 2535 int err; 2536 2537 if (!tca[TCA_OPTIONS]) 2538 return ERR_PTR(-EINVAL); 2539 2540 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2541 if (!tb) 2542 return ERR_PTR(-ENOBUFS); 2543 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2544 tca[TCA_OPTIONS], fl_policy, NULL); 2545 if (err) 2546 goto errout_tb; 2547 2548 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2549 if (!tmplt) { 2550 err = -ENOMEM; 2551 goto errout_tb; 2552 } 2553 tmplt->chain = chain; 2554 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2555 if (err) 2556 goto errout_tmplt; 2557 2558 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2559 2560 err = fl_hw_create_tmplt(chain, tmplt); 2561 if (err) 2562 goto errout_tmplt; 2563 2564 kfree(tb); 2565 return tmplt; 2566 2567 errout_tmplt: 2568 kfree(tmplt); 2569 errout_tb: 2570 kfree(tb); 2571 return ERR_PTR(err); 2572 } 2573 2574 static void fl_tmplt_destroy(void *tmplt_priv) 2575 { 2576 struct fl_flow_tmplt *tmplt = tmplt_priv; 2577 2578 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2579 kfree(tmplt); 2580 } 2581 2582 static int fl_dump_key_val(struct sk_buff *skb, 2583 void *val, int val_type, 2584 void *mask, int mask_type, int len) 2585 { 2586 int err; 2587 2588 if (!memchr_inv(mask, 0, len)) 2589 return 0; 2590 err = nla_put(skb, val_type, len, val); 2591 if (err) 2592 return err; 2593 if (mask_type != TCA_FLOWER_UNSPEC) { 2594 err = nla_put(skb, mask_type, len, mask); 2595 if (err) 2596 return err; 2597 } 2598 return 0; 2599 } 2600 2601 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2602 struct fl_flow_key *mask) 2603 { 2604 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2605 TCA_FLOWER_KEY_PORT_DST_MIN, 2606 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2607 sizeof(key->tp_range.tp_min.dst)) || 2608 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2609 TCA_FLOWER_KEY_PORT_DST_MAX, 2610 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2611 sizeof(key->tp_range.tp_max.dst)) || 2612 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2613 TCA_FLOWER_KEY_PORT_SRC_MIN, 2614 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2615 sizeof(key->tp_range.tp_min.src)) || 2616 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2617 TCA_FLOWER_KEY_PORT_SRC_MAX, 2618 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2619 sizeof(key->tp_range.tp_max.src))) 2620 return -1; 2621 2622 return 0; 2623 } 2624 2625 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2626 struct flow_dissector_key_mpls *mpls_key, 2627 struct flow_dissector_key_mpls *mpls_mask, 2628 u8 lse_index) 2629 { 2630 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2631 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2632 int err; 2633 2634 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2635 lse_index + 1); 2636 if (err) 2637 return err; 2638 2639 if (lse_mask->mpls_ttl) { 2640 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2641 lse_key->mpls_ttl); 2642 if (err) 2643 return err; 2644 } 2645 if (lse_mask->mpls_bos) { 2646 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2647 lse_key->mpls_bos); 2648 if (err) 2649 return err; 2650 } 2651 if (lse_mask->mpls_tc) { 2652 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2653 lse_key->mpls_tc); 2654 if (err) 2655 return err; 2656 } 2657 if (lse_mask->mpls_label) { 2658 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2659 lse_key->mpls_label); 2660 if (err) 2661 return err; 2662 } 2663 2664 return 0; 2665 } 2666 2667 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2668 struct flow_dissector_key_mpls *mpls_key, 2669 struct flow_dissector_key_mpls *mpls_mask) 2670 { 2671 struct nlattr *opts; 2672 struct nlattr *lse; 2673 u8 lse_index; 2674 int err; 2675 2676 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2677 if (!opts) 2678 return -EMSGSIZE; 2679 2680 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2681 if (!(mpls_mask->used_lses & 1 << lse_index)) 2682 continue; 2683 2684 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2685 if (!lse) { 2686 err = -EMSGSIZE; 2687 goto err_opts; 2688 } 2689 2690 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2691 lse_index); 2692 if (err) 2693 goto err_opts_lse; 2694 nla_nest_end(skb, lse); 2695 } 2696 nla_nest_end(skb, opts); 2697 2698 return 0; 2699 2700 err_opts_lse: 2701 nla_nest_cancel(skb, lse); 2702 err_opts: 2703 nla_nest_cancel(skb, opts); 2704 2705 return err; 2706 } 2707 2708 static int fl_dump_key_mpls(struct sk_buff *skb, 2709 struct flow_dissector_key_mpls *mpls_key, 2710 struct flow_dissector_key_mpls *mpls_mask) 2711 { 2712 struct flow_dissector_mpls_lse *lse_mask; 2713 struct flow_dissector_mpls_lse *lse_key; 2714 int err; 2715 2716 if (!mpls_mask->used_lses) 2717 return 0; 2718 2719 lse_mask = &mpls_mask->ls[0]; 2720 lse_key = &mpls_key->ls[0]; 2721 2722 /* For backward compatibility, don't use the MPLS nested attributes if 2723 * the rule can be expressed using the old attributes. 2724 */ 2725 if (mpls_mask->used_lses & ~1 || 2726 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2727 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2728 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2729 2730 if (lse_mask->mpls_ttl) { 2731 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2732 lse_key->mpls_ttl); 2733 if (err) 2734 return err; 2735 } 2736 if (lse_mask->mpls_tc) { 2737 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2738 lse_key->mpls_tc); 2739 if (err) 2740 return err; 2741 } 2742 if (lse_mask->mpls_label) { 2743 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2744 lse_key->mpls_label); 2745 if (err) 2746 return err; 2747 } 2748 if (lse_mask->mpls_bos) { 2749 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2750 lse_key->mpls_bos); 2751 if (err) 2752 return err; 2753 } 2754 return 0; 2755 } 2756 2757 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2758 struct flow_dissector_key_ip *key, 2759 struct flow_dissector_key_ip *mask) 2760 { 2761 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2762 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2763 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2764 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2765 2766 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2767 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2768 return -1; 2769 2770 return 0; 2771 } 2772 2773 static int fl_dump_key_vlan(struct sk_buff *skb, 2774 int vlan_id_key, int vlan_prio_key, 2775 struct flow_dissector_key_vlan *vlan_key, 2776 struct flow_dissector_key_vlan *vlan_mask) 2777 { 2778 int err; 2779 2780 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2781 return 0; 2782 if (vlan_mask->vlan_id) { 2783 err = nla_put_u16(skb, vlan_id_key, 2784 vlan_key->vlan_id); 2785 if (err) 2786 return err; 2787 } 2788 if (vlan_mask->vlan_priority) { 2789 err = nla_put_u8(skb, vlan_prio_key, 2790 vlan_key->vlan_priority); 2791 if (err) 2792 return err; 2793 } 2794 return 0; 2795 } 2796 2797 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2798 u32 *flower_key, u32 *flower_mask, 2799 u32 flower_flag_bit, u32 dissector_flag_bit) 2800 { 2801 if (dissector_mask & dissector_flag_bit) { 2802 *flower_mask |= flower_flag_bit; 2803 if (dissector_key & dissector_flag_bit) 2804 *flower_key |= flower_flag_bit; 2805 } 2806 } 2807 2808 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2809 { 2810 u32 key, mask; 2811 __be32 _key, _mask; 2812 int err; 2813 2814 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2815 return 0; 2816 2817 key = 0; 2818 mask = 0; 2819 2820 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2821 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2822 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2823 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2824 FLOW_DIS_FIRST_FRAG); 2825 2826 _key = cpu_to_be32(key); 2827 _mask = cpu_to_be32(mask); 2828 2829 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2830 if (err) 2831 return err; 2832 2833 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2834 } 2835 2836 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2837 struct flow_dissector_key_enc_opts *enc_opts) 2838 { 2839 struct geneve_opt *opt; 2840 struct nlattr *nest; 2841 int opt_off = 0; 2842 2843 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2844 if (!nest) 2845 goto nla_put_failure; 2846 2847 while (enc_opts->len > opt_off) { 2848 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2849 2850 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2851 opt->opt_class)) 2852 goto nla_put_failure; 2853 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2854 opt->type)) 2855 goto nla_put_failure; 2856 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2857 opt->length * 4, opt->opt_data)) 2858 goto nla_put_failure; 2859 2860 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2861 } 2862 nla_nest_end(skb, nest); 2863 return 0; 2864 2865 nla_put_failure: 2866 nla_nest_cancel(skb, nest); 2867 return -EMSGSIZE; 2868 } 2869 2870 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2871 struct flow_dissector_key_enc_opts *enc_opts) 2872 { 2873 struct vxlan_metadata *md; 2874 struct nlattr *nest; 2875 2876 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2877 if (!nest) 2878 goto nla_put_failure; 2879 2880 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2881 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2882 goto nla_put_failure; 2883 2884 nla_nest_end(skb, nest); 2885 return 0; 2886 2887 nla_put_failure: 2888 nla_nest_cancel(skb, nest); 2889 return -EMSGSIZE; 2890 } 2891 2892 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2893 struct flow_dissector_key_enc_opts *enc_opts) 2894 { 2895 struct erspan_metadata *md; 2896 struct nlattr *nest; 2897 2898 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2899 if (!nest) 2900 goto nla_put_failure; 2901 2902 md = (struct erspan_metadata *)&enc_opts->data[0]; 2903 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2904 goto nla_put_failure; 2905 2906 if (md->version == 1 && 2907 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2908 goto nla_put_failure; 2909 2910 if (md->version == 2 && 2911 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2912 md->u.md2.dir) || 2913 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2914 get_hwid(&md->u.md2)))) 2915 goto nla_put_failure; 2916 2917 nla_nest_end(skb, nest); 2918 return 0; 2919 2920 nla_put_failure: 2921 nla_nest_cancel(skb, nest); 2922 return -EMSGSIZE; 2923 } 2924 2925 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 2926 struct flow_dissector_key_enc_opts *enc_opts) 2927 2928 { 2929 struct gtp_pdu_session_info *session_info; 2930 struct nlattr *nest; 2931 2932 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 2933 if (!nest) 2934 goto nla_put_failure; 2935 2936 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 2937 2938 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 2939 session_info->pdu_type)) 2940 goto nla_put_failure; 2941 2942 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 2943 goto nla_put_failure; 2944 2945 nla_nest_end(skb, nest); 2946 return 0; 2947 2948 nla_put_failure: 2949 nla_nest_cancel(skb, nest); 2950 return -EMSGSIZE; 2951 } 2952 2953 static int fl_dump_key_ct(struct sk_buff *skb, 2954 struct flow_dissector_key_ct *key, 2955 struct flow_dissector_key_ct *mask) 2956 { 2957 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2958 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2959 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2960 sizeof(key->ct_state))) 2961 goto nla_put_failure; 2962 2963 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2964 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2965 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2966 sizeof(key->ct_zone))) 2967 goto nla_put_failure; 2968 2969 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2970 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2971 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2972 sizeof(key->ct_mark))) 2973 goto nla_put_failure; 2974 2975 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2976 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2977 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2978 sizeof(key->ct_labels))) 2979 goto nla_put_failure; 2980 2981 return 0; 2982 2983 nla_put_failure: 2984 return -EMSGSIZE; 2985 } 2986 2987 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2988 struct flow_dissector_key_enc_opts *enc_opts) 2989 { 2990 struct nlattr *nest; 2991 int err; 2992 2993 if (!enc_opts->len) 2994 return 0; 2995 2996 nest = nla_nest_start_noflag(skb, enc_opt_type); 2997 if (!nest) 2998 goto nla_put_failure; 2999 3000 switch (enc_opts->dst_opt_type) { 3001 case TUNNEL_GENEVE_OPT: 3002 err = fl_dump_key_geneve_opt(skb, enc_opts); 3003 if (err) 3004 goto nla_put_failure; 3005 break; 3006 case TUNNEL_VXLAN_OPT: 3007 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3008 if (err) 3009 goto nla_put_failure; 3010 break; 3011 case TUNNEL_ERSPAN_OPT: 3012 err = fl_dump_key_erspan_opt(skb, enc_opts); 3013 if (err) 3014 goto nla_put_failure; 3015 break; 3016 case TUNNEL_GTP_OPT: 3017 err = fl_dump_key_gtp_opt(skb, enc_opts); 3018 if (err) 3019 goto nla_put_failure; 3020 break; 3021 default: 3022 goto nla_put_failure; 3023 } 3024 nla_nest_end(skb, nest); 3025 return 0; 3026 3027 nla_put_failure: 3028 nla_nest_cancel(skb, nest); 3029 return -EMSGSIZE; 3030 } 3031 3032 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3033 struct flow_dissector_key_enc_opts *key_opts, 3034 struct flow_dissector_key_enc_opts *msk_opts) 3035 { 3036 int err; 3037 3038 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3039 if (err) 3040 return err; 3041 3042 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3043 } 3044 3045 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3046 struct fl_flow_key *key, struct fl_flow_key *mask) 3047 { 3048 if (mask->meta.ingress_ifindex) { 3049 struct net_device *dev; 3050 3051 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3052 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3053 goto nla_put_failure; 3054 } 3055 3056 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3057 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3058 sizeof(key->eth.dst)) || 3059 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3060 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3061 sizeof(key->eth.src)) || 3062 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3063 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3064 sizeof(key->basic.n_proto))) 3065 goto nla_put_failure; 3066 3067 if (mask->num_of_vlans.num_of_vlans) { 3068 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3069 goto nla_put_failure; 3070 } 3071 3072 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3073 goto nla_put_failure; 3074 3075 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3076 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3077 goto nla_put_failure; 3078 3079 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3080 TCA_FLOWER_KEY_CVLAN_PRIO, 3081 &key->cvlan, &mask->cvlan) || 3082 (mask->cvlan.vlan_tpid && 3083 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3084 key->cvlan.vlan_tpid))) 3085 goto nla_put_failure; 3086 3087 if (mask->basic.n_proto) { 3088 if (mask->cvlan.vlan_eth_type) { 3089 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3090 key->basic.n_proto)) 3091 goto nla_put_failure; 3092 } else if (mask->vlan.vlan_eth_type) { 3093 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3094 key->vlan.vlan_eth_type)) 3095 goto nla_put_failure; 3096 } 3097 } 3098 3099 if ((key->basic.n_proto == htons(ETH_P_IP) || 3100 key->basic.n_proto == htons(ETH_P_IPV6)) && 3101 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3102 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3103 sizeof(key->basic.ip_proto)) || 3104 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3105 goto nla_put_failure; 3106 3107 if (mask->pppoe.session_id) { 3108 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3109 key->pppoe.session_id)) 3110 goto nla_put_failure; 3111 } 3112 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3113 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3114 key->pppoe.ppp_proto)) 3115 goto nla_put_failure; 3116 } 3117 3118 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3119 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3120 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3121 sizeof(key->ipv4.src)) || 3122 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3123 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3124 sizeof(key->ipv4.dst)))) 3125 goto nla_put_failure; 3126 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3127 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3128 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3129 sizeof(key->ipv6.src)) || 3130 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3131 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3132 sizeof(key->ipv6.dst)))) 3133 goto nla_put_failure; 3134 3135 if (key->basic.ip_proto == IPPROTO_TCP && 3136 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3137 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3138 sizeof(key->tp.src)) || 3139 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3140 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3141 sizeof(key->tp.dst)) || 3142 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3143 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3144 sizeof(key->tcp.flags)))) 3145 goto nla_put_failure; 3146 else if (key->basic.ip_proto == IPPROTO_UDP && 3147 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3148 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3149 sizeof(key->tp.src)) || 3150 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3151 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3152 sizeof(key->tp.dst)))) 3153 goto nla_put_failure; 3154 else if (key->basic.ip_proto == IPPROTO_SCTP && 3155 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3156 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3157 sizeof(key->tp.src)) || 3158 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3159 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3160 sizeof(key->tp.dst)))) 3161 goto nla_put_failure; 3162 else if (key->basic.n_proto == htons(ETH_P_IP) && 3163 key->basic.ip_proto == IPPROTO_ICMP && 3164 (fl_dump_key_val(skb, &key->icmp.type, 3165 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3166 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3167 sizeof(key->icmp.type)) || 3168 fl_dump_key_val(skb, &key->icmp.code, 3169 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3170 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3171 sizeof(key->icmp.code)))) 3172 goto nla_put_failure; 3173 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3174 key->basic.ip_proto == IPPROTO_ICMPV6 && 3175 (fl_dump_key_val(skb, &key->icmp.type, 3176 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3177 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3178 sizeof(key->icmp.type)) || 3179 fl_dump_key_val(skb, &key->icmp.code, 3180 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3181 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3182 sizeof(key->icmp.code)))) 3183 goto nla_put_failure; 3184 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3185 key->basic.n_proto == htons(ETH_P_RARP)) && 3186 (fl_dump_key_val(skb, &key->arp.sip, 3187 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3188 TCA_FLOWER_KEY_ARP_SIP_MASK, 3189 sizeof(key->arp.sip)) || 3190 fl_dump_key_val(skb, &key->arp.tip, 3191 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3192 TCA_FLOWER_KEY_ARP_TIP_MASK, 3193 sizeof(key->arp.tip)) || 3194 fl_dump_key_val(skb, &key->arp.op, 3195 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3196 TCA_FLOWER_KEY_ARP_OP_MASK, 3197 sizeof(key->arp.op)) || 3198 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3199 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3200 sizeof(key->arp.sha)) || 3201 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3202 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3203 sizeof(key->arp.tha)))) 3204 goto nla_put_failure; 3205 else if (key->basic.ip_proto == IPPROTO_L2TP && 3206 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3207 TCA_FLOWER_KEY_L2TPV3_SID, 3208 &mask->l2tpv3.session_id, 3209 TCA_FLOWER_UNSPEC, 3210 sizeof(key->l2tpv3.session_id))) 3211 goto nla_put_failure; 3212 3213 if ((key->basic.ip_proto == IPPROTO_TCP || 3214 key->basic.ip_proto == IPPROTO_UDP || 3215 key->basic.ip_proto == IPPROTO_SCTP) && 3216 fl_dump_key_port_range(skb, key, mask)) 3217 goto nla_put_failure; 3218 3219 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3220 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3221 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3222 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3223 sizeof(key->enc_ipv4.src)) || 3224 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3225 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3226 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3227 sizeof(key->enc_ipv4.dst)))) 3228 goto nla_put_failure; 3229 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3230 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3231 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3232 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3233 sizeof(key->enc_ipv6.src)) || 3234 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3235 TCA_FLOWER_KEY_ENC_IPV6_DST, 3236 &mask->enc_ipv6.dst, 3237 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3238 sizeof(key->enc_ipv6.dst)))) 3239 goto nla_put_failure; 3240 3241 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3242 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3243 sizeof(key->enc_key_id)) || 3244 fl_dump_key_val(skb, &key->enc_tp.src, 3245 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3246 &mask->enc_tp.src, 3247 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3248 sizeof(key->enc_tp.src)) || 3249 fl_dump_key_val(skb, &key->enc_tp.dst, 3250 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3251 &mask->enc_tp.dst, 3252 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3253 sizeof(key->enc_tp.dst)) || 3254 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3255 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3256 goto nla_put_failure; 3257 3258 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3259 goto nla_put_failure; 3260 3261 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3262 goto nla_put_failure; 3263 3264 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3265 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3266 sizeof(key->hash.hash))) 3267 goto nla_put_failure; 3268 3269 return 0; 3270 3271 nla_put_failure: 3272 return -EMSGSIZE; 3273 } 3274 3275 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3276 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3277 { 3278 struct cls_fl_filter *f = fh; 3279 struct nlattr *nest; 3280 struct fl_flow_key *key, *mask; 3281 bool skip_hw; 3282 3283 if (!f) 3284 return skb->len; 3285 3286 t->tcm_handle = f->handle; 3287 3288 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3289 if (!nest) 3290 goto nla_put_failure; 3291 3292 spin_lock(&tp->lock); 3293 3294 if (f->res.classid && 3295 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3296 goto nla_put_failure_locked; 3297 3298 key = &f->key; 3299 mask = &f->mask->key; 3300 skip_hw = tc_skip_hw(f->flags); 3301 3302 if (fl_dump_key(skb, net, key, mask)) 3303 goto nla_put_failure_locked; 3304 3305 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3306 goto nla_put_failure_locked; 3307 3308 spin_unlock(&tp->lock); 3309 3310 if (!skip_hw) 3311 fl_hw_update_stats(tp, f, rtnl_held); 3312 3313 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3314 goto nla_put_failure; 3315 3316 if (tcf_exts_dump(skb, &f->exts)) 3317 goto nla_put_failure; 3318 3319 nla_nest_end(skb, nest); 3320 3321 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3322 goto nla_put_failure; 3323 3324 return skb->len; 3325 3326 nla_put_failure_locked: 3327 spin_unlock(&tp->lock); 3328 nla_put_failure: 3329 nla_nest_cancel(skb, nest); 3330 return -1; 3331 } 3332 3333 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3334 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3335 { 3336 struct cls_fl_filter *f = fh; 3337 struct nlattr *nest; 3338 bool skip_hw; 3339 3340 if (!f) 3341 return skb->len; 3342 3343 t->tcm_handle = f->handle; 3344 3345 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3346 if (!nest) 3347 goto nla_put_failure; 3348 3349 spin_lock(&tp->lock); 3350 3351 skip_hw = tc_skip_hw(f->flags); 3352 3353 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3354 goto nla_put_failure_locked; 3355 3356 spin_unlock(&tp->lock); 3357 3358 if (!skip_hw) 3359 fl_hw_update_stats(tp, f, rtnl_held); 3360 3361 if (tcf_exts_terse_dump(skb, &f->exts)) 3362 goto nla_put_failure; 3363 3364 nla_nest_end(skb, nest); 3365 3366 return skb->len; 3367 3368 nla_put_failure_locked: 3369 spin_unlock(&tp->lock); 3370 nla_put_failure: 3371 nla_nest_cancel(skb, nest); 3372 return -1; 3373 } 3374 3375 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3376 { 3377 struct fl_flow_tmplt *tmplt = tmplt_priv; 3378 struct fl_flow_key *key, *mask; 3379 struct nlattr *nest; 3380 3381 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3382 if (!nest) 3383 goto nla_put_failure; 3384 3385 key = &tmplt->dummy_key; 3386 mask = &tmplt->mask; 3387 3388 if (fl_dump_key(skb, net, key, mask)) 3389 goto nla_put_failure; 3390 3391 nla_nest_end(skb, nest); 3392 3393 return skb->len; 3394 3395 nla_put_failure: 3396 nla_nest_cancel(skb, nest); 3397 return -EMSGSIZE; 3398 } 3399 3400 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3401 unsigned long base) 3402 { 3403 struct cls_fl_filter *f = fh; 3404 3405 tc_cls_bind_class(classid, cl, q, &f->res, base); 3406 } 3407 3408 static bool fl_delete_empty(struct tcf_proto *tp) 3409 { 3410 struct cls_fl_head *head = fl_head_dereference(tp); 3411 3412 spin_lock(&tp->lock); 3413 tp->deleting = idr_is_empty(&head->handle_idr); 3414 spin_unlock(&tp->lock); 3415 3416 return tp->deleting; 3417 } 3418 3419 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3420 .kind = "flower", 3421 .classify = fl_classify, 3422 .init = fl_init, 3423 .destroy = fl_destroy, 3424 .get = fl_get, 3425 .put = fl_put, 3426 .change = fl_change, 3427 .delete = fl_delete, 3428 .delete_empty = fl_delete_empty, 3429 .walk = fl_walk, 3430 .reoffload = fl_reoffload, 3431 .hw_add = fl_hw_add, 3432 .hw_del = fl_hw_del, 3433 .dump = fl_dump, 3434 .terse_dump = fl_terse_dump, 3435 .bind_class = fl_bind_class, 3436 .tmplt_create = fl_tmplt_create, 3437 .tmplt_destroy = fl_tmplt_destroy, 3438 .tmplt_dump = fl_tmplt_dump, 3439 .owner = THIS_MODULE, 3440 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3441 }; 3442 3443 static int __init cls_fl_init(void) 3444 { 3445 return register_tcf_proto_ops(&cls_fl_ops); 3446 } 3447 3448 static void __exit cls_fl_exit(void) 3449 { 3450 unregister_tcf_proto_ops(&cls_fl_ops); 3451 } 3452 3453 module_init(cls_fl_init); 3454 module_exit(cls_fl_exit); 3455 3456 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3457 MODULE_DESCRIPTION("Flower classifier"); 3458 MODULE_LICENSE("GPL v2"); 3459