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 31 #include <net/dst.h> 32 #include <net/dst_metadata.h> 33 34 #include <uapi/linux/netfilter/nf_conntrack_common.h> 35 36 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 37 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 38 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 39 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 40 41 struct fl_flow_key { 42 struct flow_dissector_key_meta meta; 43 struct flow_dissector_key_control control; 44 struct flow_dissector_key_control enc_control; 45 struct flow_dissector_key_basic basic; 46 struct flow_dissector_key_eth_addrs eth; 47 struct flow_dissector_key_vlan vlan; 48 struct flow_dissector_key_vlan cvlan; 49 union { 50 struct flow_dissector_key_ipv4_addrs ipv4; 51 struct flow_dissector_key_ipv6_addrs ipv6; 52 }; 53 struct flow_dissector_key_ports tp; 54 struct flow_dissector_key_icmp icmp; 55 struct flow_dissector_key_arp arp; 56 struct flow_dissector_key_keyid enc_key_id; 57 union { 58 struct flow_dissector_key_ipv4_addrs enc_ipv4; 59 struct flow_dissector_key_ipv6_addrs enc_ipv6; 60 }; 61 struct flow_dissector_key_ports enc_tp; 62 struct flow_dissector_key_mpls mpls; 63 struct flow_dissector_key_tcp tcp; 64 struct flow_dissector_key_ip ip; 65 struct flow_dissector_key_ip enc_ip; 66 struct flow_dissector_key_enc_opts enc_opts; 67 struct flow_dissector_key_ports_range tp_range; 68 struct flow_dissector_key_ct ct; 69 struct flow_dissector_key_hash hash; 70 struct flow_dissector_key_num_of_vlans num_of_vlans; 71 struct flow_dissector_key_pppoe pppoe; 72 struct flow_dissector_key_l2tpv3 l2tpv3; 73 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 74 75 struct fl_flow_mask_range { 76 unsigned short int start; 77 unsigned short int end; 78 }; 79 80 struct fl_flow_mask { 81 struct fl_flow_key key; 82 struct fl_flow_mask_range range; 83 u32 flags; 84 struct rhash_head ht_node; 85 struct rhashtable ht; 86 struct rhashtable_params filter_ht_params; 87 struct flow_dissector dissector; 88 struct list_head filters; 89 struct rcu_work rwork; 90 struct list_head list; 91 refcount_t refcnt; 92 }; 93 94 struct fl_flow_tmplt { 95 struct fl_flow_key dummy_key; 96 struct fl_flow_key mask; 97 struct flow_dissector dissector; 98 struct tcf_chain *chain; 99 }; 100 101 struct cls_fl_head { 102 struct rhashtable ht; 103 spinlock_t masks_lock; /* Protect masks list */ 104 struct list_head masks; 105 struct list_head hw_filters; 106 struct rcu_work rwork; 107 struct idr handle_idr; 108 }; 109 110 struct cls_fl_filter { 111 struct fl_flow_mask *mask; 112 struct rhash_head ht_node; 113 struct fl_flow_key mkey; 114 struct tcf_exts exts; 115 struct tcf_result res; 116 struct fl_flow_key key; 117 struct list_head list; 118 struct list_head hw_list; 119 u32 handle; 120 u32 flags; 121 u32 in_hw_count; 122 struct rcu_work rwork; 123 struct net_device *hw_dev; 124 /* Flower classifier is unlocked, which means that its reference counter 125 * can be changed concurrently without any kind of external 126 * synchronization. Use atomic reference counter to be concurrency-safe. 127 */ 128 refcount_t refcnt; 129 bool deleted; 130 }; 131 132 static const struct rhashtable_params mask_ht_params = { 133 .key_offset = offsetof(struct fl_flow_mask, key), 134 .key_len = sizeof(struct fl_flow_key), 135 .head_offset = offsetof(struct fl_flow_mask, ht_node), 136 .automatic_shrinking = true, 137 }; 138 139 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 140 { 141 return mask->range.end - mask->range.start; 142 } 143 144 static void fl_mask_update_range(struct fl_flow_mask *mask) 145 { 146 const u8 *bytes = (const u8 *) &mask->key; 147 size_t size = sizeof(mask->key); 148 size_t i, first = 0, last; 149 150 for (i = 0; i < size; i++) { 151 if (bytes[i]) { 152 first = i; 153 break; 154 } 155 } 156 last = first; 157 for (i = size - 1; i != first; i--) { 158 if (bytes[i]) { 159 last = i; 160 break; 161 } 162 } 163 mask->range.start = rounddown(first, sizeof(long)); 164 mask->range.end = roundup(last + 1, sizeof(long)); 165 } 166 167 static void *fl_key_get_start(struct fl_flow_key *key, 168 const struct fl_flow_mask *mask) 169 { 170 return (u8 *) key + mask->range.start; 171 } 172 173 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 174 struct fl_flow_mask *mask) 175 { 176 const long *lkey = fl_key_get_start(key, mask); 177 const long *lmask = fl_key_get_start(&mask->key, mask); 178 long *lmkey = fl_key_get_start(mkey, mask); 179 int i; 180 181 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 182 *lmkey++ = *lkey++ & *lmask++; 183 } 184 185 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 186 struct fl_flow_mask *mask) 187 { 188 const long *lmask = fl_key_get_start(&mask->key, mask); 189 const long *ltmplt; 190 int i; 191 192 if (!tmplt) 193 return true; 194 ltmplt = fl_key_get_start(&tmplt->mask, mask); 195 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 196 if (~*ltmplt++ & *lmask++) 197 return false; 198 } 199 return true; 200 } 201 202 static void fl_clear_masked_range(struct fl_flow_key *key, 203 struct fl_flow_mask *mask) 204 { 205 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 206 } 207 208 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 209 struct fl_flow_key *key, 210 struct fl_flow_key *mkey) 211 { 212 u16 min_mask, max_mask, min_val, max_val; 213 214 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 215 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 216 min_val = ntohs(filter->key.tp_range.tp_min.dst); 217 max_val = ntohs(filter->key.tp_range.tp_max.dst); 218 219 if (min_mask && max_mask) { 220 if (ntohs(key->tp_range.tp.dst) < min_val || 221 ntohs(key->tp_range.tp.dst) > max_val) 222 return false; 223 224 /* skb does not have min and max values */ 225 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 226 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 227 } 228 return true; 229 } 230 231 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 232 struct fl_flow_key *key, 233 struct fl_flow_key *mkey) 234 { 235 u16 min_mask, max_mask, min_val, max_val; 236 237 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 238 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 239 min_val = ntohs(filter->key.tp_range.tp_min.src); 240 max_val = ntohs(filter->key.tp_range.tp_max.src); 241 242 if (min_mask && max_mask) { 243 if (ntohs(key->tp_range.tp.src) < min_val || 244 ntohs(key->tp_range.tp.src) > max_val) 245 return false; 246 247 /* skb does not have min and max values */ 248 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 249 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 250 } 251 return true; 252 } 253 254 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 255 struct fl_flow_key *mkey) 256 { 257 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 258 mask->filter_ht_params); 259 } 260 261 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 262 struct fl_flow_key *mkey, 263 struct fl_flow_key *key) 264 { 265 struct cls_fl_filter *filter, *f; 266 267 list_for_each_entry_rcu(filter, &mask->filters, list) { 268 if (!fl_range_port_dst_cmp(filter, key, mkey)) 269 continue; 270 271 if (!fl_range_port_src_cmp(filter, key, mkey)) 272 continue; 273 274 f = __fl_lookup(mask, mkey); 275 if (f) 276 return f; 277 } 278 return NULL; 279 } 280 281 static noinline_for_stack 282 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 283 { 284 struct fl_flow_key mkey; 285 286 fl_set_masked_key(&mkey, key, mask); 287 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 288 return fl_lookup_range(mask, &mkey, key); 289 290 return __fl_lookup(mask, &mkey); 291 } 292 293 static u16 fl_ct_info_to_flower_map[] = { 294 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 295 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 296 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 297 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 298 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 299 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 300 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 301 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 302 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 303 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 304 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 305 TCA_FLOWER_KEY_CT_FLAGS_NEW, 306 }; 307 308 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 309 struct tcf_result *res) 310 { 311 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 312 bool post_ct = tc_skb_cb(skb)->post_ct; 313 u16 zone = tc_skb_cb(skb)->zone; 314 struct fl_flow_key skb_key; 315 struct fl_flow_mask *mask; 316 struct cls_fl_filter *f; 317 318 list_for_each_entry_rcu(mask, &head->masks, list) { 319 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 320 fl_clear_masked_range(&skb_key, mask); 321 322 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 323 /* skb_flow_dissect() does not set n_proto in case an unknown 324 * protocol, so do it rather here. 325 */ 326 skb_key.basic.n_proto = skb_protocol(skb, false); 327 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 328 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 329 fl_ct_info_to_flower_map, 330 ARRAY_SIZE(fl_ct_info_to_flower_map), 331 post_ct, zone); 332 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 333 skb_flow_dissect(skb, &mask->dissector, &skb_key, 334 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); 335 336 f = fl_mask_lookup(mask, &skb_key); 337 if (f && !tc_skip_sw(f->flags)) { 338 *res = f->res; 339 return tcf_exts_exec(skb, &f->exts, res); 340 } 341 } 342 return -1; 343 } 344 345 static int fl_init(struct tcf_proto *tp) 346 { 347 struct cls_fl_head *head; 348 349 head = kzalloc(sizeof(*head), GFP_KERNEL); 350 if (!head) 351 return -ENOBUFS; 352 353 spin_lock_init(&head->masks_lock); 354 INIT_LIST_HEAD_RCU(&head->masks); 355 INIT_LIST_HEAD(&head->hw_filters); 356 rcu_assign_pointer(tp->root, head); 357 idr_init(&head->handle_idr); 358 359 return rhashtable_init(&head->ht, &mask_ht_params); 360 } 361 362 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 363 { 364 /* temporary masks don't have their filters list and ht initialized */ 365 if (mask_init_done) { 366 WARN_ON(!list_empty(&mask->filters)); 367 rhashtable_destroy(&mask->ht); 368 } 369 kfree(mask); 370 } 371 372 static void fl_mask_free_work(struct work_struct *work) 373 { 374 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 375 struct fl_flow_mask, rwork); 376 377 fl_mask_free(mask, true); 378 } 379 380 static void fl_uninit_mask_free_work(struct work_struct *work) 381 { 382 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 383 struct fl_flow_mask, rwork); 384 385 fl_mask_free(mask, false); 386 } 387 388 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 389 { 390 if (!refcount_dec_and_test(&mask->refcnt)) 391 return false; 392 393 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 394 395 spin_lock(&head->masks_lock); 396 list_del_rcu(&mask->list); 397 spin_unlock(&head->masks_lock); 398 399 tcf_queue_work(&mask->rwork, fl_mask_free_work); 400 401 return true; 402 } 403 404 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 405 { 406 /* Flower classifier only changes root pointer during init and destroy. 407 * Users must obtain reference to tcf_proto instance before calling its 408 * API, so tp->root pointer is protected from concurrent call to 409 * fl_destroy() by reference counting. 410 */ 411 return rcu_dereference_raw(tp->root); 412 } 413 414 static void __fl_destroy_filter(struct cls_fl_filter *f) 415 { 416 tcf_exts_destroy(&f->exts); 417 tcf_exts_put_net(&f->exts); 418 kfree(f); 419 } 420 421 static void fl_destroy_filter_work(struct work_struct *work) 422 { 423 struct cls_fl_filter *f = container_of(to_rcu_work(work), 424 struct cls_fl_filter, rwork); 425 426 __fl_destroy_filter(f); 427 } 428 429 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 430 bool rtnl_held, struct netlink_ext_ack *extack) 431 { 432 struct tcf_block *block = tp->chain->block; 433 struct flow_cls_offload cls_flower = {}; 434 435 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 436 cls_flower.command = FLOW_CLS_DESTROY; 437 cls_flower.cookie = (unsigned long) f; 438 439 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 440 &f->flags, &f->in_hw_count, rtnl_held); 441 442 } 443 444 static int fl_hw_replace_filter(struct tcf_proto *tp, 445 struct cls_fl_filter *f, bool rtnl_held, 446 struct netlink_ext_ack *extack) 447 { 448 struct tcf_block *block = tp->chain->block; 449 struct flow_cls_offload cls_flower = {}; 450 bool skip_sw = tc_skip_sw(f->flags); 451 int err = 0; 452 453 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 454 if (!cls_flower.rule) 455 return -ENOMEM; 456 457 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 458 cls_flower.command = FLOW_CLS_REPLACE; 459 cls_flower.cookie = (unsigned long) f; 460 cls_flower.rule->match.dissector = &f->mask->dissector; 461 cls_flower.rule->match.mask = &f->mask->key; 462 cls_flower.rule->match.key = &f->mkey; 463 cls_flower.classid = f->res.classid; 464 465 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 466 cls_flower.common.extack); 467 if (err) { 468 kfree(cls_flower.rule); 469 470 return skip_sw ? err : 0; 471 } 472 473 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 474 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 475 tc_cleanup_offload_action(&cls_flower.rule->action); 476 kfree(cls_flower.rule); 477 478 if (err) { 479 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 480 return err; 481 } 482 483 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 484 return -EINVAL; 485 486 return 0; 487 } 488 489 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 490 bool rtnl_held) 491 { 492 struct tcf_block *block = tp->chain->block; 493 struct flow_cls_offload cls_flower = {}; 494 495 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 496 cls_flower.command = FLOW_CLS_STATS; 497 cls_flower.cookie = (unsigned long) f; 498 cls_flower.classid = f->res.classid; 499 500 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 501 rtnl_held); 502 503 tcf_exts_hw_stats_update(&f->exts, cls_flower.stats.bytes, 504 cls_flower.stats.pkts, 505 cls_flower.stats.drops, 506 cls_flower.stats.lastused, 507 cls_flower.stats.used_hw_stats, 508 cls_flower.stats.used_hw_stats_valid); 509 } 510 511 static void __fl_put(struct cls_fl_filter *f) 512 { 513 if (!refcount_dec_and_test(&f->refcnt)) 514 return; 515 516 if (tcf_exts_get_net(&f->exts)) 517 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 518 else 519 __fl_destroy_filter(f); 520 } 521 522 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 523 { 524 struct cls_fl_filter *f; 525 526 rcu_read_lock(); 527 f = idr_find(&head->handle_idr, handle); 528 if (f && !refcount_inc_not_zero(&f->refcnt)) 529 f = NULL; 530 rcu_read_unlock(); 531 532 return f; 533 } 534 535 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 536 bool *last, bool rtnl_held, 537 struct netlink_ext_ack *extack) 538 { 539 struct cls_fl_head *head = fl_head_dereference(tp); 540 541 *last = false; 542 543 spin_lock(&tp->lock); 544 if (f->deleted) { 545 spin_unlock(&tp->lock); 546 return -ENOENT; 547 } 548 549 f->deleted = true; 550 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 551 f->mask->filter_ht_params); 552 idr_remove(&head->handle_idr, f->handle); 553 list_del_rcu(&f->list); 554 spin_unlock(&tp->lock); 555 556 *last = fl_mask_put(head, f->mask); 557 if (!tc_skip_hw(f->flags)) 558 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 559 tcf_unbind_filter(tp, &f->res); 560 __fl_put(f); 561 562 return 0; 563 } 564 565 static void fl_destroy_sleepable(struct work_struct *work) 566 { 567 struct cls_fl_head *head = container_of(to_rcu_work(work), 568 struct cls_fl_head, 569 rwork); 570 571 rhashtable_destroy(&head->ht); 572 kfree(head); 573 module_put(THIS_MODULE); 574 } 575 576 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 577 struct netlink_ext_ack *extack) 578 { 579 struct cls_fl_head *head = fl_head_dereference(tp); 580 struct fl_flow_mask *mask, *next_mask; 581 struct cls_fl_filter *f, *next; 582 bool last; 583 584 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 585 list_for_each_entry_safe(f, next, &mask->filters, list) { 586 __fl_delete(tp, f, &last, rtnl_held, extack); 587 if (last) 588 break; 589 } 590 } 591 idr_destroy(&head->handle_idr); 592 593 __module_get(THIS_MODULE); 594 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 595 } 596 597 static void fl_put(struct tcf_proto *tp, void *arg) 598 { 599 struct cls_fl_filter *f = arg; 600 601 __fl_put(f); 602 } 603 604 static void *fl_get(struct tcf_proto *tp, u32 handle) 605 { 606 struct cls_fl_head *head = fl_head_dereference(tp); 607 608 return __fl_get(head, handle); 609 } 610 611 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 612 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 613 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 614 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 615 .len = IFNAMSIZ }, 616 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 617 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 618 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 619 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 620 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 621 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 622 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 623 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 624 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 625 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 626 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 627 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 628 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 629 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 630 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 631 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 632 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 633 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 634 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 635 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 636 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 637 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 638 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 639 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 640 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 641 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 642 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 643 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 644 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 645 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 646 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 648 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 649 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 650 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 651 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 652 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 653 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 654 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 655 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 656 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 657 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 658 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 659 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 660 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 661 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 662 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 663 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 664 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 665 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 666 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 667 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 668 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 669 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 670 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 671 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 672 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 673 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 674 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 675 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 676 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 677 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 678 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 679 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 680 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 681 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 682 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 683 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 684 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 685 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 686 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 687 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 688 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 689 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 690 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 692 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 694 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 695 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 696 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 697 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 698 [TCA_FLOWER_KEY_CT_STATE] = 699 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 700 [TCA_FLOWER_KEY_CT_STATE_MASK] = 701 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 702 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 703 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 704 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 705 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 706 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 707 .len = 128 / BITS_PER_BYTE }, 708 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 709 .len = 128 / BITS_PER_BYTE }, 710 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 711 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 712 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 713 [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, 714 [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, 715 [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, 716 [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, 717 718 }; 719 720 static const struct nla_policy 721 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 722 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 723 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 724 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 725 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 726 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 727 [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .type = NLA_NESTED }, 728 }; 729 730 static const struct nla_policy 731 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 732 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 733 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 734 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 735 .len = 128 }, 736 }; 737 738 static const struct nla_policy 739 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 740 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 741 }; 742 743 static const struct nla_policy 744 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 745 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 746 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 747 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 748 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 749 }; 750 751 static const struct nla_policy 752 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { 753 [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, 754 [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, 755 }; 756 757 static const struct nla_policy 758 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 759 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 760 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 761 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 762 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 763 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 764 }; 765 766 static void fl_set_key_val(struct nlattr **tb, 767 void *val, int val_type, 768 void *mask, int mask_type, int len) 769 { 770 if (!tb[val_type]) 771 return; 772 nla_memcpy(val, tb[val_type], len); 773 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 774 memset(mask, 0xff, len); 775 else 776 nla_memcpy(mask, tb[mask_type], len); 777 } 778 779 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 780 struct fl_flow_key *mask, 781 struct netlink_ext_ack *extack) 782 { 783 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 784 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 785 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 786 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 787 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 788 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 789 fl_set_key_val(tb, &key->tp_range.tp_min.src, 790 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 791 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 792 fl_set_key_val(tb, &key->tp_range.tp_max.src, 793 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 794 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 795 796 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 797 ntohs(key->tp_range.tp_max.dst) <= 798 ntohs(key->tp_range.tp_min.dst)) { 799 NL_SET_ERR_MSG_ATTR(extack, 800 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 801 "Invalid destination port range (min must be strictly smaller than max)"); 802 return -EINVAL; 803 } 804 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 805 ntohs(key->tp_range.tp_max.src) <= 806 ntohs(key->tp_range.tp_min.src)) { 807 NL_SET_ERR_MSG_ATTR(extack, 808 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 809 "Invalid source port range (min must be strictly smaller than max)"); 810 return -EINVAL; 811 } 812 813 return 0; 814 } 815 816 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 817 struct flow_dissector_key_mpls *key_val, 818 struct flow_dissector_key_mpls *key_mask, 819 struct netlink_ext_ack *extack) 820 { 821 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 822 struct flow_dissector_mpls_lse *lse_mask; 823 struct flow_dissector_mpls_lse *lse_val; 824 u8 lse_index; 825 u8 depth; 826 int err; 827 828 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 829 mpls_stack_entry_policy, extack); 830 if (err < 0) 831 return err; 832 833 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 834 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 835 return -EINVAL; 836 } 837 838 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 839 840 /* LSE depth starts at 1, for consistency with terminology used by 841 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 842 */ 843 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 844 NL_SET_ERR_MSG_ATTR(extack, 845 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 846 "Invalid MPLS depth"); 847 return -EINVAL; 848 } 849 lse_index = depth - 1; 850 851 dissector_set_mpls_lse(key_val, lse_index); 852 dissector_set_mpls_lse(key_mask, lse_index); 853 854 lse_val = &key_val->ls[lse_index]; 855 lse_mask = &key_mask->ls[lse_index]; 856 857 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 858 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 859 lse_mask->mpls_ttl = MPLS_TTL_MASK; 860 } 861 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 862 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 863 864 if (bos & ~MPLS_BOS_MASK) { 865 NL_SET_ERR_MSG_ATTR(extack, 866 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 867 "Bottom Of Stack (BOS) must be 0 or 1"); 868 return -EINVAL; 869 } 870 lse_val->mpls_bos = bos; 871 lse_mask->mpls_bos = MPLS_BOS_MASK; 872 } 873 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 874 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 875 876 if (tc & ~MPLS_TC_MASK) { 877 NL_SET_ERR_MSG_ATTR(extack, 878 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 879 "Traffic Class (TC) must be between 0 and 7"); 880 return -EINVAL; 881 } 882 lse_val->mpls_tc = tc; 883 lse_mask->mpls_tc = MPLS_TC_MASK; 884 } 885 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 886 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 887 888 if (label & ~MPLS_LABEL_MASK) { 889 NL_SET_ERR_MSG_ATTR(extack, 890 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 891 "Label must be between 0 and 1048575"); 892 return -EINVAL; 893 } 894 lse_val->mpls_label = label; 895 lse_mask->mpls_label = MPLS_LABEL_MASK; 896 } 897 898 return 0; 899 } 900 901 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 902 struct flow_dissector_key_mpls *key_val, 903 struct flow_dissector_key_mpls *key_mask, 904 struct netlink_ext_ack *extack) 905 { 906 struct nlattr *nla_lse; 907 int rem; 908 int err; 909 910 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 911 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 912 "NLA_F_NESTED is missing"); 913 return -EINVAL; 914 } 915 916 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 917 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 918 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 919 "Invalid MPLS option type"); 920 return -EINVAL; 921 } 922 923 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 924 if (err < 0) 925 return err; 926 } 927 if (rem) { 928 NL_SET_ERR_MSG(extack, 929 "Bytes leftover after parsing MPLS options"); 930 return -EINVAL; 931 } 932 933 return 0; 934 } 935 936 static int fl_set_key_mpls(struct nlattr **tb, 937 struct flow_dissector_key_mpls *key_val, 938 struct flow_dissector_key_mpls *key_mask, 939 struct netlink_ext_ack *extack) 940 { 941 struct flow_dissector_mpls_lse *lse_mask; 942 struct flow_dissector_mpls_lse *lse_val; 943 944 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 945 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 946 tb[TCA_FLOWER_KEY_MPLS_BOS] || 947 tb[TCA_FLOWER_KEY_MPLS_TC] || 948 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 949 NL_SET_ERR_MSG_ATTR(extack, 950 tb[TCA_FLOWER_KEY_MPLS_OPTS], 951 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 952 return -EBADMSG; 953 } 954 955 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 956 key_val, key_mask, extack); 957 } 958 959 lse_val = &key_val->ls[0]; 960 lse_mask = &key_mask->ls[0]; 961 962 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 963 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 964 lse_mask->mpls_ttl = MPLS_TTL_MASK; 965 dissector_set_mpls_lse(key_val, 0); 966 dissector_set_mpls_lse(key_mask, 0); 967 } 968 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 969 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 970 971 if (bos & ~MPLS_BOS_MASK) { 972 NL_SET_ERR_MSG_ATTR(extack, 973 tb[TCA_FLOWER_KEY_MPLS_BOS], 974 "Bottom Of Stack (BOS) must be 0 or 1"); 975 return -EINVAL; 976 } 977 lse_val->mpls_bos = bos; 978 lse_mask->mpls_bos = MPLS_BOS_MASK; 979 dissector_set_mpls_lse(key_val, 0); 980 dissector_set_mpls_lse(key_mask, 0); 981 } 982 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 983 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 984 985 if (tc & ~MPLS_TC_MASK) { 986 NL_SET_ERR_MSG_ATTR(extack, 987 tb[TCA_FLOWER_KEY_MPLS_TC], 988 "Traffic Class (TC) must be between 0 and 7"); 989 return -EINVAL; 990 } 991 lse_val->mpls_tc = tc; 992 lse_mask->mpls_tc = MPLS_TC_MASK; 993 dissector_set_mpls_lse(key_val, 0); 994 dissector_set_mpls_lse(key_mask, 0); 995 } 996 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 997 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 998 999 if (label & ~MPLS_LABEL_MASK) { 1000 NL_SET_ERR_MSG_ATTR(extack, 1001 tb[TCA_FLOWER_KEY_MPLS_LABEL], 1002 "Label must be between 0 and 1048575"); 1003 return -EINVAL; 1004 } 1005 lse_val->mpls_label = label; 1006 lse_mask->mpls_label = MPLS_LABEL_MASK; 1007 dissector_set_mpls_lse(key_val, 0); 1008 dissector_set_mpls_lse(key_mask, 0); 1009 } 1010 return 0; 1011 } 1012 1013 static void fl_set_key_vlan(struct nlattr **tb, 1014 __be16 ethertype, 1015 int vlan_id_key, int vlan_prio_key, 1016 int vlan_next_eth_type_key, 1017 struct flow_dissector_key_vlan *key_val, 1018 struct flow_dissector_key_vlan *key_mask) 1019 { 1020 #define VLAN_PRIORITY_MASK 0x7 1021 1022 if (tb[vlan_id_key]) { 1023 key_val->vlan_id = 1024 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1025 key_mask->vlan_id = VLAN_VID_MASK; 1026 } 1027 if (tb[vlan_prio_key]) { 1028 key_val->vlan_priority = 1029 nla_get_u8(tb[vlan_prio_key]) & 1030 VLAN_PRIORITY_MASK; 1031 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1032 } 1033 if (ethertype) { 1034 key_val->vlan_tpid = ethertype; 1035 key_mask->vlan_tpid = cpu_to_be16(~0); 1036 } 1037 if (tb[vlan_next_eth_type_key]) { 1038 key_val->vlan_eth_type = 1039 nla_get_be16(tb[vlan_next_eth_type_key]); 1040 key_mask->vlan_eth_type = cpu_to_be16(~0); 1041 } 1042 } 1043 1044 static void fl_set_key_pppoe(struct nlattr **tb, 1045 struct flow_dissector_key_pppoe *key_val, 1046 struct flow_dissector_key_pppoe *key_mask, 1047 struct fl_flow_key *key, 1048 struct fl_flow_key *mask) 1049 { 1050 /* key_val::type must be set to ETH_P_PPP_SES 1051 * because ETH_P_PPP_SES was stored in basic.n_proto 1052 * which might get overwritten by ppp_proto 1053 * or might be set to 0, the role of key_val::type 1054 * is simmilar to vlan_key::tpid 1055 */ 1056 key_val->type = htons(ETH_P_PPP_SES); 1057 key_mask->type = cpu_to_be16(~0); 1058 1059 if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { 1060 key_val->session_id = 1061 nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); 1062 key_mask->session_id = cpu_to_be16(~0); 1063 } 1064 if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { 1065 key_val->ppp_proto = 1066 nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); 1067 key_mask->ppp_proto = cpu_to_be16(~0); 1068 1069 if (key_val->ppp_proto == htons(PPP_IP)) { 1070 key->basic.n_proto = htons(ETH_P_IP); 1071 mask->basic.n_proto = cpu_to_be16(~0); 1072 } else if (key_val->ppp_proto == htons(PPP_IPV6)) { 1073 key->basic.n_proto = htons(ETH_P_IPV6); 1074 mask->basic.n_proto = cpu_to_be16(~0); 1075 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { 1076 key->basic.n_proto = htons(ETH_P_MPLS_UC); 1077 mask->basic.n_proto = cpu_to_be16(~0); 1078 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { 1079 key->basic.n_proto = htons(ETH_P_MPLS_MC); 1080 mask->basic.n_proto = cpu_to_be16(~0); 1081 } 1082 } else { 1083 key->basic.n_proto = 0; 1084 mask->basic.n_proto = cpu_to_be16(0); 1085 } 1086 } 1087 1088 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1089 u32 *dissector_key, u32 *dissector_mask, 1090 u32 flower_flag_bit, u32 dissector_flag_bit) 1091 { 1092 if (flower_mask & flower_flag_bit) { 1093 *dissector_mask |= dissector_flag_bit; 1094 if (flower_key & flower_flag_bit) 1095 *dissector_key |= dissector_flag_bit; 1096 } 1097 } 1098 1099 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1100 u32 *flags_mask, struct netlink_ext_ack *extack) 1101 { 1102 u32 key, mask; 1103 1104 /* mask is mandatory for flags */ 1105 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1106 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1107 return -EINVAL; 1108 } 1109 1110 key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS])); 1111 mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1112 1113 *flags_key = 0; 1114 *flags_mask = 0; 1115 1116 fl_set_key_flag(key, mask, flags_key, flags_mask, 1117 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1118 fl_set_key_flag(key, mask, flags_key, flags_mask, 1119 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1120 FLOW_DIS_FIRST_FRAG); 1121 1122 return 0; 1123 } 1124 1125 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1126 struct flow_dissector_key_ip *key, 1127 struct flow_dissector_key_ip *mask) 1128 { 1129 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1130 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1131 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1132 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1133 1134 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1135 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1136 } 1137 1138 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1139 int depth, int option_len, 1140 struct netlink_ext_ack *extack) 1141 { 1142 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1143 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1144 struct geneve_opt *opt; 1145 int err, data_len = 0; 1146 1147 if (option_len > sizeof(struct geneve_opt)) 1148 data_len = option_len - sizeof(struct geneve_opt); 1149 1150 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1151 memset(opt, 0xff, option_len); 1152 opt->length = data_len / 4; 1153 opt->r1 = 0; 1154 opt->r2 = 0; 1155 opt->r3 = 0; 1156 1157 /* If no mask has been prodived we assume an exact match. */ 1158 if (!depth) 1159 return sizeof(struct geneve_opt) + data_len; 1160 1161 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1162 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1163 return -EINVAL; 1164 } 1165 1166 err = nla_parse_nested_deprecated(tb, 1167 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1168 nla, geneve_opt_policy, extack); 1169 if (err < 0) 1170 return err; 1171 1172 /* We are not allowed to omit any of CLASS, TYPE or DATA 1173 * fields from the key. 1174 */ 1175 if (!option_len && 1176 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1177 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1178 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1179 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1180 return -EINVAL; 1181 } 1182 1183 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1184 * for the mask. 1185 */ 1186 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1187 int new_len = key->enc_opts.len; 1188 1189 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1190 data_len = nla_len(data); 1191 if (data_len < 4) { 1192 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1193 return -ERANGE; 1194 } 1195 if (data_len % 4) { 1196 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1197 return -ERANGE; 1198 } 1199 1200 new_len += sizeof(struct geneve_opt) + data_len; 1201 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1202 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1203 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1204 return -ERANGE; 1205 } 1206 opt->length = data_len / 4; 1207 memcpy(opt->opt_data, nla_data(data), data_len); 1208 } 1209 1210 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1211 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1212 opt->opt_class = nla_get_be16(class); 1213 } 1214 1215 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1216 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1217 opt->type = nla_get_u8(type); 1218 } 1219 1220 return sizeof(struct geneve_opt) + data_len; 1221 } 1222 1223 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1224 int depth, int option_len, 1225 struct netlink_ext_ack *extack) 1226 { 1227 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1228 struct vxlan_metadata *md; 1229 int err; 1230 1231 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1232 memset(md, 0xff, sizeof(*md)); 1233 1234 if (!depth) 1235 return sizeof(*md); 1236 1237 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1238 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1239 return -EINVAL; 1240 } 1241 1242 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1243 vxlan_opt_policy, extack); 1244 if (err < 0) 1245 return err; 1246 1247 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1248 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1249 return -EINVAL; 1250 } 1251 1252 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1253 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1254 md->gbp &= VXLAN_GBP_MASK; 1255 } 1256 1257 return sizeof(*md); 1258 } 1259 1260 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1261 int depth, int option_len, 1262 struct netlink_ext_ack *extack) 1263 { 1264 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1265 struct erspan_metadata *md; 1266 int err; 1267 1268 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1269 memset(md, 0xff, sizeof(*md)); 1270 md->version = 1; 1271 1272 if (!depth) 1273 return sizeof(*md); 1274 1275 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1276 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1277 return -EINVAL; 1278 } 1279 1280 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1281 erspan_opt_policy, extack); 1282 if (err < 0) 1283 return err; 1284 1285 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1286 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1287 return -EINVAL; 1288 } 1289 1290 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1291 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1292 1293 if (md->version == 1) { 1294 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1295 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1296 return -EINVAL; 1297 } 1298 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1299 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1300 memset(&md->u, 0x00, sizeof(md->u)); 1301 md->u.index = nla_get_be32(nla); 1302 } 1303 } else if (md->version == 2) { 1304 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1305 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1306 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1307 return -EINVAL; 1308 } 1309 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1310 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1311 md->u.md2.dir = nla_get_u8(nla); 1312 } 1313 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1314 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1315 set_hwid(&md->u.md2, nla_get_u8(nla)); 1316 } 1317 } else { 1318 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1319 return -EINVAL; 1320 } 1321 1322 return sizeof(*md); 1323 } 1324 1325 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1326 int depth, int option_len, 1327 struct netlink_ext_ack *extack) 1328 { 1329 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1330 struct gtp_pdu_session_info *sinfo; 1331 u8 len = key->enc_opts.len; 1332 int err; 1333 1334 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1335 memset(sinfo, 0xff, option_len); 1336 1337 if (!depth) 1338 return sizeof(*sinfo); 1339 1340 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1341 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1342 return -EINVAL; 1343 } 1344 1345 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1346 gtp_opt_policy, extack); 1347 if (err < 0) 1348 return err; 1349 1350 if (!option_len && 1351 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1352 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1353 NL_SET_ERR_MSG_MOD(extack, 1354 "Missing tunnel key gtp option pdu type or qfi"); 1355 return -EINVAL; 1356 } 1357 1358 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1359 sinfo->pdu_type = 1360 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1361 1362 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1363 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1364 1365 return sizeof(*sinfo); 1366 } 1367 1368 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1369 struct fl_flow_key *mask, 1370 struct netlink_ext_ack *extack) 1371 { 1372 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1373 int err, option_len, key_depth, msk_depth = 0; 1374 1375 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1376 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1377 enc_opts_policy, extack); 1378 if (err) 1379 return err; 1380 1381 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1382 1383 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1384 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1385 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1386 enc_opts_policy, extack); 1387 if (err) 1388 return err; 1389 1390 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1391 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1392 if (!nla_ok(nla_opt_msk, msk_depth)) { 1393 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1394 return -EINVAL; 1395 } 1396 } 1397 1398 nla_for_each_attr(nla_opt_key, nla_enc_key, 1399 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1400 switch (nla_type(nla_opt_key)) { 1401 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1402 if (key->enc_opts.dst_opt_type && 1403 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1404 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1405 return -EINVAL; 1406 } 1407 option_len = 0; 1408 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1409 option_len = fl_set_geneve_opt(nla_opt_key, key, 1410 key_depth, option_len, 1411 extack); 1412 if (option_len < 0) 1413 return option_len; 1414 1415 key->enc_opts.len += option_len; 1416 /* At the same time we need to parse through the mask 1417 * in order to verify exact and mask attribute lengths. 1418 */ 1419 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1420 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1421 msk_depth, option_len, 1422 extack); 1423 if (option_len < 0) 1424 return option_len; 1425 1426 mask->enc_opts.len += option_len; 1427 if (key->enc_opts.len != mask->enc_opts.len) { 1428 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1429 return -EINVAL; 1430 } 1431 break; 1432 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1433 if (key->enc_opts.dst_opt_type) { 1434 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1435 return -EINVAL; 1436 } 1437 option_len = 0; 1438 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1439 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1440 key_depth, option_len, 1441 extack); 1442 if (option_len < 0) 1443 return option_len; 1444 1445 key->enc_opts.len += option_len; 1446 /* At the same time we need to parse through the mask 1447 * in order to verify exact and mask attribute lengths. 1448 */ 1449 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1450 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1451 msk_depth, option_len, 1452 extack); 1453 if (option_len < 0) 1454 return option_len; 1455 1456 mask->enc_opts.len += option_len; 1457 if (key->enc_opts.len != mask->enc_opts.len) { 1458 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1459 return -EINVAL; 1460 } 1461 break; 1462 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1463 if (key->enc_opts.dst_opt_type) { 1464 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1465 return -EINVAL; 1466 } 1467 option_len = 0; 1468 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1469 option_len = fl_set_erspan_opt(nla_opt_key, key, 1470 key_depth, option_len, 1471 extack); 1472 if (option_len < 0) 1473 return option_len; 1474 1475 key->enc_opts.len += option_len; 1476 /* At the same time we need to parse through the mask 1477 * in order to verify exact and mask attribute lengths. 1478 */ 1479 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1480 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1481 msk_depth, option_len, 1482 extack); 1483 if (option_len < 0) 1484 return option_len; 1485 1486 mask->enc_opts.len += option_len; 1487 if (key->enc_opts.len != mask->enc_opts.len) { 1488 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1489 return -EINVAL; 1490 } 1491 break; 1492 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1493 if (key->enc_opts.dst_opt_type) { 1494 NL_SET_ERR_MSG_MOD(extack, 1495 "Duplicate type for gtp options"); 1496 return -EINVAL; 1497 } 1498 option_len = 0; 1499 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1500 option_len = fl_set_gtp_opt(nla_opt_key, key, 1501 key_depth, option_len, 1502 extack); 1503 if (option_len < 0) 1504 return option_len; 1505 1506 key->enc_opts.len += option_len; 1507 /* At the same time we need to parse through the mask 1508 * in order to verify exact and mask attribute lengths. 1509 */ 1510 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1511 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1512 msk_depth, option_len, 1513 extack); 1514 if (option_len < 0) 1515 return option_len; 1516 1517 mask->enc_opts.len += option_len; 1518 if (key->enc_opts.len != mask->enc_opts.len) { 1519 NL_SET_ERR_MSG_MOD(extack, 1520 "Key and mask miss aligned"); 1521 return -EINVAL; 1522 } 1523 break; 1524 default: 1525 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1526 return -EINVAL; 1527 } 1528 1529 if (!msk_depth) 1530 continue; 1531 1532 if (!nla_ok(nla_opt_msk, msk_depth)) { 1533 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1534 return -EINVAL; 1535 } 1536 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1537 } 1538 1539 return 0; 1540 } 1541 1542 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1543 struct netlink_ext_ack *extack) 1544 { 1545 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1546 NL_SET_ERR_MSG_ATTR(extack, tb, 1547 "no trk, so no other flag can be set"); 1548 return -EINVAL; 1549 } 1550 1551 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1552 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1553 NL_SET_ERR_MSG_ATTR(extack, tb, 1554 "new and est are mutually exclusive"); 1555 return -EINVAL; 1556 } 1557 1558 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1559 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1560 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1561 NL_SET_ERR_MSG_ATTR(extack, tb, 1562 "when inv is set, only trk may be set"); 1563 return -EINVAL; 1564 } 1565 1566 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1567 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1568 NL_SET_ERR_MSG_ATTR(extack, tb, 1569 "new and rpl are mutually exclusive"); 1570 return -EINVAL; 1571 } 1572 1573 return 0; 1574 } 1575 1576 static int fl_set_key_ct(struct nlattr **tb, 1577 struct flow_dissector_key_ct *key, 1578 struct flow_dissector_key_ct *mask, 1579 struct netlink_ext_ack *extack) 1580 { 1581 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1582 int err; 1583 1584 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1585 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1586 return -EOPNOTSUPP; 1587 } 1588 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1589 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1590 sizeof(key->ct_state)); 1591 1592 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1593 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1594 extack); 1595 if (err) 1596 return err; 1597 1598 } 1599 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1600 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1601 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1602 return -EOPNOTSUPP; 1603 } 1604 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1605 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1606 sizeof(key->ct_zone)); 1607 } 1608 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1609 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1610 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1611 return -EOPNOTSUPP; 1612 } 1613 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1614 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1615 sizeof(key->ct_mark)); 1616 } 1617 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1618 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1619 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1620 return -EOPNOTSUPP; 1621 } 1622 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1623 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1624 sizeof(key->ct_labels)); 1625 } 1626 1627 return 0; 1628 } 1629 1630 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1631 struct fl_flow_key *key, struct fl_flow_key *mask, 1632 int vthresh) 1633 { 1634 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1635 1636 if (!tb) { 1637 *ethertype = 0; 1638 return good_num_of_vlans; 1639 } 1640 1641 *ethertype = nla_get_be16(tb); 1642 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1643 return true; 1644 1645 key->basic.n_proto = *ethertype; 1646 mask->basic.n_proto = cpu_to_be16(~0); 1647 return false; 1648 } 1649 1650 static int fl_set_key(struct net *net, struct nlattr **tb, 1651 struct fl_flow_key *key, struct fl_flow_key *mask, 1652 struct netlink_ext_ack *extack) 1653 { 1654 __be16 ethertype; 1655 int ret = 0; 1656 1657 if (tb[TCA_FLOWER_INDEV]) { 1658 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1659 if (err < 0) 1660 return err; 1661 key->meta.ingress_ifindex = err; 1662 mask->meta.ingress_ifindex = 0xffffffff; 1663 } 1664 1665 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1666 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1667 sizeof(key->eth.dst)); 1668 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1669 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1670 sizeof(key->eth.src)); 1671 fl_set_key_val(tb, &key->num_of_vlans, 1672 TCA_FLOWER_KEY_NUM_OF_VLANS, 1673 &mask->num_of_vlans, 1674 TCA_FLOWER_UNSPEC, 1675 sizeof(key->num_of_vlans)); 1676 1677 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1678 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1679 TCA_FLOWER_KEY_VLAN_PRIO, 1680 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1681 &key->vlan, &mask->vlan); 1682 1683 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1684 ðertype, key, mask, 1)) { 1685 fl_set_key_vlan(tb, ethertype, 1686 TCA_FLOWER_KEY_CVLAN_ID, 1687 TCA_FLOWER_KEY_CVLAN_PRIO, 1688 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1689 &key->cvlan, &mask->cvlan); 1690 fl_set_key_val(tb, &key->basic.n_proto, 1691 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1692 &mask->basic.n_proto, 1693 TCA_FLOWER_UNSPEC, 1694 sizeof(key->basic.n_proto)); 1695 } 1696 } 1697 1698 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1699 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1700 1701 if (key->basic.n_proto == htons(ETH_P_IP) || 1702 key->basic.n_proto == htons(ETH_P_IPV6)) { 1703 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1704 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1705 sizeof(key->basic.ip_proto)); 1706 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1707 } 1708 1709 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1710 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1711 mask->control.addr_type = ~0; 1712 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1713 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1714 sizeof(key->ipv4.src)); 1715 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1716 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1717 sizeof(key->ipv4.dst)); 1718 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1719 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1720 mask->control.addr_type = ~0; 1721 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1722 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1723 sizeof(key->ipv6.src)); 1724 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1725 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1726 sizeof(key->ipv6.dst)); 1727 } 1728 1729 if (key->basic.ip_proto == IPPROTO_TCP) { 1730 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1731 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1732 sizeof(key->tp.src)); 1733 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1734 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1735 sizeof(key->tp.dst)); 1736 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1737 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1738 sizeof(key->tcp.flags)); 1739 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1740 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1741 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1742 sizeof(key->tp.src)); 1743 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1744 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1745 sizeof(key->tp.dst)); 1746 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1747 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1748 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1749 sizeof(key->tp.src)); 1750 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1751 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1752 sizeof(key->tp.dst)); 1753 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1754 key->basic.ip_proto == IPPROTO_ICMP) { 1755 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1756 &mask->icmp.type, 1757 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1758 sizeof(key->icmp.type)); 1759 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1760 &mask->icmp.code, 1761 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1762 sizeof(key->icmp.code)); 1763 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1764 key->basic.ip_proto == IPPROTO_ICMPV6) { 1765 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1766 &mask->icmp.type, 1767 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1768 sizeof(key->icmp.type)); 1769 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1770 &mask->icmp.code, 1771 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1772 sizeof(key->icmp.code)); 1773 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1774 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1775 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1776 if (ret) 1777 return ret; 1778 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1779 key->basic.n_proto == htons(ETH_P_RARP)) { 1780 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1781 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1782 sizeof(key->arp.sip)); 1783 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1784 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1785 sizeof(key->arp.tip)); 1786 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1787 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1788 sizeof(key->arp.op)); 1789 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1790 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1791 sizeof(key->arp.sha)); 1792 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1793 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1794 sizeof(key->arp.tha)); 1795 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 1796 fl_set_key_val(tb, &key->l2tpv3.session_id, 1797 TCA_FLOWER_KEY_L2TPV3_SID, 1798 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 1799 sizeof(key->l2tpv3.session_id)); 1800 } 1801 1802 if (key->basic.ip_proto == IPPROTO_TCP || 1803 key->basic.ip_proto == IPPROTO_UDP || 1804 key->basic.ip_proto == IPPROTO_SCTP) { 1805 ret = fl_set_key_port_range(tb, key, mask, extack); 1806 if (ret) 1807 return ret; 1808 } 1809 1810 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1811 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1812 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1813 mask->enc_control.addr_type = ~0; 1814 fl_set_key_val(tb, &key->enc_ipv4.src, 1815 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1816 &mask->enc_ipv4.src, 1817 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1818 sizeof(key->enc_ipv4.src)); 1819 fl_set_key_val(tb, &key->enc_ipv4.dst, 1820 TCA_FLOWER_KEY_ENC_IPV4_DST, 1821 &mask->enc_ipv4.dst, 1822 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1823 sizeof(key->enc_ipv4.dst)); 1824 } 1825 1826 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1827 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1828 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1829 mask->enc_control.addr_type = ~0; 1830 fl_set_key_val(tb, &key->enc_ipv6.src, 1831 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1832 &mask->enc_ipv6.src, 1833 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1834 sizeof(key->enc_ipv6.src)); 1835 fl_set_key_val(tb, &key->enc_ipv6.dst, 1836 TCA_FLOWER_KEY_ENC_IPV6_DST, 1837 &mask->enc_ipv6.dst, 1838 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1839 sizeof(key->enc_ipv6.dst)); 1840 } 1841 1842 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1843 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1844 sizeof(key->enc_key_id.keyid)); 1845 1846 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1847 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1848 sizeof(key->enc_tp.src)); 1849 1850 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1851 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1852 sizeof(key->enc_tp.dst)); 1853 1854 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1855 1856 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1857 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1858 sizeof(key->hash.hash)); 1859 1860 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1861 ret = fl_set_enc_opt(tb, key, mask, extack); 1862 if (ret) 1863 return ret; 1864 } 1865 1866 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1867 if (ret) 1868 return ret; 1869 1870 if (tb[TCA_FLOWER_KEY_FLAGS]) 1871 ret = fl_set_key_flags(tb, &key->control.flags, 1872 &mask->control.flags, extack); 1873 1874 return ret; 1875 } 1876 1877 static void fl_mask_copy(struct fl_flow_mask *dst, 1878 struct fl_flow_mask *src) 1879 { 1880 const void *psrc = fl_key_get_start(&src->key, src); 1881 void *pdst = fl_key_get_start(&dst->key, src); 1882 1883 memcpy(pdst, psrc, fl_mask_range(src)); 1884 dst->range = src->range; 1885 } 1886 1887 static const struct rhashtable_params fl_ht_params = { 1888 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1889 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1890 .automatic_shrinking = true, 1891 }; 1892 1893 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1894 { 1895 mask->filter_ht_params = fl_ht_params; 1896 mask->filter_ht_params.key_len = fl_mask_range(mask); 1897 mask->filter_ht_params.key_offset += mask->range.start; 1898 1899 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1900 } 1901 1902 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1903 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1904 1905 #define FL_KEY_IS_MASKED(mask, member) \ 1906 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1907 0, FL_KEY_MEMBER_SIZE(member)) \ 1908 1909 #define FL_KEY_SET(keys, cnt, id, member) \ 1910 do { \ 1911 keys[cnt].key_id = id; \ 1912 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1913 cnt++; \ 1914 } while(0); 1915 1916 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1917 do { \ 1918 if (FL_KEY_IS_MASKED(mask, member)) \ 1919 FL_KEY_SET(keys, cnt, id, member); \ 1920 } while(0); 1921 1922 static void fl_init_dissector(struct flow_dissector *dissector, 1923 struct fl_flow_key *mask) 1924 { 1925 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1926 size_t cnt = 0; 1927 1928 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1929 FLOW_DISSECTOR_KEY_META, meta); 1930 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1931 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1932 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1933 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1934 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1935 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1936 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1937 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1938 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1939 FLOW_DISSECTOR_KEY_PORTS, tp); 1940 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1941 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1942 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1943 FLOW_DISSECTOR_KEY_IP, ip); 1944 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1945 FLOW_DISSECTOR_KEY_TCP, tcp); 1946 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1947 FLOW_DISSECTOR_KEY_ICMP, icmp); 1948 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1949 FLOW_DISSECTOR_KEY_ARP, arp); 1950 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1951 FLOW_DISSECTOR_KEY_MPLS, mpls); 1952 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1953 FLOW_DISSECTOR_KEY_VLAN, vlan); 1954 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1955 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1956 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1957 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1958 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1959 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1960 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1961 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1962 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1963 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1964 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1965 enc_control); 1966 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1967 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1968 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1969 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1970 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1971 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1972 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1973 FLOW_DISSECTOR_KEY_CT, ct); 1974 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1975 FLOW_DISSECTOR_KEY_HASH, hash); 1976 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1977 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 1978 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1979 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 1980 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1981 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 1982 1983 skb_flow_dissector_init(dissector, keys, cnt); 1984 } 1985 1986 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1987 struct fl_flow_mask *mask) 1988 { 1989 struct fl_flow_mask *newmask; 1990 int err; 1991 1992 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1993 if (!newmask) 1994 return ERR_PTR(-ENOMEM); 1995 1996 fl_mask_copy(newmask, mask); 1997 1998 if ((newmask->key.tp_range.tp_min.dst && 1999 newmask->key.tp_range.tp_max.dst) || 2000 (newmask->key.tp_range.tp_min.src && 2001 newmask->key.tp_range.tp_max.src)) 2002 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2003 2004 err = fl_init_mask_hashtable(newmask); 2005 if (err) 2006 goto errout_free; 2007 2008 fl_init_dissector(&newmask->dissector, &newmask->key); 2009 2010 INIT_LIST_HEAD_RCU(&newmask->filters); 2011 2012 refcount_set(&newmask->refcnt, 1); 2013 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2014 &newmask->ht_node, mask_ht_params); 2015 if (err) 2016 goto errout_destroy; 2017 2018 spin_lock(&head->masks_lock); 2019 list_add_tail_rcu(&newmask->list, &head->masks); 2020 spin_unlock(&head->masks_lock); 2021 2022 return newmask; 2023 2024 errout_destroy: 2025 rhashtable_destroy(&newmask->ht); 2026 errout_free: 2027 kfree(newmask); 2028 2029 return ERR_PTR(err); 2030 } 2031 2032 static int fl_check_assign_mask(struct cls_fl_head *head, 2033 struct cls_fl_filter *fnew, 2034 struct cls_fl_filter *fold, 2035 struct fl_flow_mask *mask) 2036 { 2037 struct fl_flow_mask *newmask; 2038 int ret = 0; 2039 2040 rcu_read_lock(); 2041 2042 /* Insert mask as temporary node to prevent concurrent creation of mask 2043 * with same key. Any concurrent lookups with same key will return 2044 * -EAGAIN because mask's refcnt is zero. 2045 */ 2046 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2047 &mask->ht_node, 2048 mask_ht_params); 2049 if (!fnew->mask) { 2050 rcu_read_unlock(); 2051 2052 if (fold) { 2053 ret = -EINVAL; 2054 goto errout_cleanup; 2055 } 2056 2057 newmask = fl_create_new_mask(head, mask); 2058 if (IS_ERR(newmask)) { 2059 ret = PTR_ERR(newmask); 2060 goto errout_cleanup; 2061 } 2062 2063 fnew->mask = newmask; 2064 return 0; 2065 } else if (IS_ERR(fnew->mask)) { 2066 ret = PTR_ERR(fnew->mask); 2067 } else if (fold && fold->mask != fnew->mask) { 2068 ret = -EINVAL; 2069 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2070 /* Mask was deleted concurrently, try again */ 2071 ret = -EAGAIN; 2072 } 2073 rcu_read_unlock(); 2074 return ret; 2075 2076 errout_cleanup: 2077 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2078 mask_ht_params); 2079 return ret; 2080 } 2081 2082 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 2083 struct cls_fl_filter *f, struct fl_flow_mask *mask, 2084 unsigned long base, struct nlattr **tb, 2085 struct nlattr *est, 2086 struct fl_flow_tmplt *tmplt, 2087 u32 flags, u32 fl_flags, 2088 struct netlink_ext_ack *extack) 2089 { 2090 int err; 2091 2092 err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags, 2093 fl_flags, extack); 2094 if (err < 0) 2095 return err; 2096 2097 if (tb[TCA_FLOWER_CLASSID]) { 2098 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2099 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2100 rtnl_lock(); 2101 tcf_bind_filter(tp, &f->res, base); 2102 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2103 rtnl_unlock(); 2104 } 2105 2106 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 2107 if (err) 2108 return err; 2109 2110 fl_mask_update_range(mask); 2111 fl_set_masked_key(&f->mkey, &f->key, mask); 2112 2113 if (!fl_mask_fits_tmplt(tmplt, mask)) { 2114 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2115 return -EINVAL; 2116 } 2117 2118 return 0; 2119 } 2120 2121 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2122 struct cls_fl_filter *fold, 2123 bool *in_ht) 2124 { 2125 struct fl_flow_mask *mask = fnew->mask; 2126 int err; 2127 2128 err = rhashtable_lookup_insert_fast(&mask->ht, 2129 &fnew->ht_node, 2130 mask->filter_ht_params); 2131 if (err) { 2132 *in_ht = false; 2133 /* It is okay if filter with same key exists when 2134 * overwriting. 2135 */ 2136 return fold && err == -EEXIST ? 0 : err; 2137 } 2138 2139 *in_ht = true; 2140 return 0; 2141 } 2142 2143 static int fl_change(struct net *net, struct sk_buff *in_skb, 2144 struct tcf_proto *tp, unsigned long base, 2145 u32 handle, struct nlattr **tca, 2146 void **arg, u32 flags, 2147 struct netlink_ext_ack *extack) 2148 { 2149 struct cls_fl_head *head = fl_head_dereference(tp); 2150 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2151 struct cls_fl_filter *fold = *arg; 2152 struct cls_fl_filter *fnew; 2153 struct fl_flow_mask *mask; 2154 struct nlattr **tb; 2155 bool in_ht; 2156 int err; 2157 2158 if (!tca[TCA_OPTIONS]) { 2159 err = -EINVAL; 2160 goto errout_fold; 2161 } 2162 2163 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2164 if (!mask) { 2165 err = -ENOBUFS; 2166 goto errout_fold; 2167 } 2168 2169 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2170 if (!tb) { 2171 err = -ENOBUFS; 2172 goto errout_mask_alloc; 2173 } 2174 2175 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2176 tca[TCA_OPTIONS], fl_policy, NULL); 2177 if (err < 0) 2178 goto errout_tb; 2179 2180 if (fold && handle && fold->handle != handle) { 2181 err = -EINVAL; 2182 goto errout_tb; 2183 } 2184 2185 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2186 if (!fnew) { 2187 err = -ENOBUFS; 2188 goto errout_tb; 2189 } 2190 INIT_LIST_HEAD(&fnew->hw_list); 2191 refcount_set(&fnew->refcnt, 1); 2192 2193 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 2194 if (err < 0) 2195 goto errout; 2196 2197 if (tb[TCA_FLOWER_FLAGS]) { 2198 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2199 2200 if (!tc_flags_valid(fnew->flags)) { 2201 err = -EINVAL; 2202 goto errout; 2203 } 2204 } 2205 2206 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], 2207 tp->chain->tmplt_priv, flags, fnew->flags, 2208 extack); 2209 if (err) 2210 goto errout; 2211 2212 err = fl_check_assign_mask(head, fnew, fold, mask); 2213 if (err) 2214 goto errout; 2215 2216 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2217 if (err) 2218 goto errout_mask; 2219 2220 if (!tc_skip_hw(fnew->flags)) { 2221 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2222 if (err) 2223 goto errout_ht; 2224 } 2225 2226 if (!tc_in_hw(fnew->flags)) 2227 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2228 2229 spin_lock(&tp->lock); 2230 2231 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2232 * proto again or create new one, if necessary. 2233 */ 2234 if (tp->deleting) { 2235 err = -EAGAIN; 2236 goto errout_hw; 2237 } 2238 2239 if (fold) { 2240 /* Fold filter was deleted concurrently. Retry lookup. */ 2241 if (fold->deleted) { 2242 err = -EAGAIN; 2243 goto errout_hw; 2244 } 2245 2246 fnew->handle = handle; 2247 2248 if (!in_ht) { 2249 struct rhashtable_params params = 2250 fnew->mask->filter_ht_params; 2251 2252 err = rhashtable_insert_fast(&fnew->mask->ht, 2253 &fnew->ht_node, 2254 params); 2255 if (err) 2256 goto errout_hw; 2257 in_ht = true; 2258 } 2259 2260 refcount_inc(&fnew->refcnt); 2261 rhashtable_remove_fast(&fold->mask->ht, 2262 &fold->ht_node, 2263 fold->mask->filter_ht_params); 2264 idr_replace(&head->handle_idr, fnew, fnew->handle); 2265 list_replace_rcu(&fold->list, &fnew->list); 2266 fold->deleted = true; 2267 2268 spin_unlock(&tp->lock); 2269 2270 fl_mask_put(head, fold->mask); 2271 if (!tc_skip_hw(fold->flags)) 2272 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2273 tcf_unbind_filter(tp, &fold->res); 2274 /* Caller holds reference to fold, so refcnt is always > 0 2275 * after this. 2276 */ 2277 refcount_dec(&fold->refcnt); 2278 __fl_put(fold); 2279 } else { 2280 if (handle) { 2281 /* user specifies a handle and it doesn't exist */ 2282 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2283 handle, GFP_ATOMIC); 2284 2285 /* Filter with specified handle was concurrently 2286 * inserted after initial check in cls_api. This is not 2287 * necessarily an error if NLM_F_EXCL is not set in 2288 * message flags. Returning EAGAIN will cause cls_api to 2289 * try to update concurrently inserted rule. 2290 */ 2291 if (err == -ENOSPC) 2292 err = -EAGAIN; 2293 } else { 2294 handle = 1; 2295 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2296 INT_MAX, GFP_ATOMIC); 2297 } 2298 if (err) 2299 goto errout_hw; 2300 2301 refcount_inc(&fnew->refcnt); 2302 fnew->handle = handle; 2303 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2304 spin_unlock(&tp->lock); 2305 } 2306 2307 *arg = fnew; 2308 2309 kfree(tb); 2310 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2311 return 0; 2312 2313 errout_ht: 2314 spin_lock(&tp->lock); 2315 errout_hw: 2316 fnew->deleted = true; 2317 spin_unlock(&tp->lock); 2318 if (!tc_skip_hw(fnew->flags)) 2319 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2320 if (in_ht) 2321 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2322 fnew->mask->filter_ht_params); 2323 errout_mask: 2324 fl_mask_put(head, fnew->mask); 2325 errout: 2326 __fl_put(fnew); 2327 errout_tb: 2328 kfree(tb); 2329 errout_mask_alloc: 2330 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2331 errout_fold: 2332 if (fold) 2333 __fl_put(fold); 2334 return err; 2335 } 2336 2337 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2338 bool rtnl_held, struct netlink_ext_ack *extack) 2339 { 2340 struct cls_fl_head *head = fl_head_dereference(tp); 2341 struct cls_fl_filter *f = arg; 2342 bool last_on_mask; 2343 int err = 0; 2344 2345 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2346 *last = list_empty(&head->masks); 2347 __fl_put(f); 2348 2349 return err; 2350 } 2351 2352 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2353 bool rtnl_held) 2354 { 2355 struct cls_fl_head *head = fl_head_dereference(tp); 2356 unsigned long id = arg->cookie, tmp; 2357 struct cls_fl_filter *f; 2358 2359 arg->count = arg->skip; 2360 2361 rcu_read_lock(); 2362 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2363 /* don't return filters that are being deleted */ 2364 if (!refcount_inc_not_zero(&f->refcnt)) 2365 continue; 2366 rcu_read_unlock(); 2367 2368 if (arg->fn(tp, f, arg) < 0) { 2369 __fl_put(f); 2370 arg->stop = 1; 2371 rcu_read_lock(); 2372 break; 2373 } 2374 __fl_put(f); 2375 arg->count++; 2376 rcu_read_lock(); 2377 } 2378 rcu_read_unlock(); 2379 arg->cookie = id; 2380 } 2381 2382 static struct cls_fl_filter * 2383 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2384 { 2385 struct cls_fl_head *head = fl_head_dereference(tp); 2386 2387 spin_lock(&tp->lock); 2388 if (list_empty(&head->hw_filters)) { 2389 spin_unlock(&tp->lock); 2390 return NULL; 2391 } 2392 2393 if (!f) 2394 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2395 hw_list); 2396 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2397 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2398 spin_unlock(&tp->lock); 2399 return f; 2400 } 2401 } 2402 2403 spin_unlock(&tp->lock); 2404 return NULL; 2405 } 2406 2407 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2408 void *cb_priv, struct netlink_ext_ack *extack) 2409 { 2410 struct tcf_block *block = tp->chain->block; 2411 struct flow_cls_offload cls_flower = {}; 2412 struct cls_fl_filter *f = NULL; 2413 int err; 2414 2415 /* hw_filters list can only be changed by hw offload functions after 2416 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2417 * iterating it. 2418 */ 2419 ASSERT_RTNL(); 2420 2421 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2422 cls_flower.rule = 2423 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2424 if (!cls_flower.rule) { 2425 __fl_put(f); 2426 return -ENOMEM; 2427 } 2428 2429 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2430 extack); 2431 cls_flower.command = add ? 2432 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2433 cls_flower.cookie = (unsigned long)f; 2434 cls_flower.rule->match.dissector = &f->mask->dissector; 2435 cls_flower.rule->match.mask = &f->mask->key; 2436 cls_flower.rule->match.key = &f->mkey; 2437 2438 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2439 cls_flower.common.extack); 2440 if (err) { 2441 kfree(cls_flower.rule); 2442 if (tc_skip_sw(f->flags)) { 2443 __fl_put(f); 2444 return err; 2445 } 2446 goto next_flow; 2447 } 2448 2449 cls_flower.classid = f->res.classid; 2450 2451 err = tc_setup_cb_reoffload(block, tp, add, cb, 2452 TC_SETUP_CLSFLOWER, &cls_flower, 2453 cb_priv, &f->flags, 2454 &f->in_hw_count); 2455 tc_cleanup_offload_action(&cls_flower.rule->action); 2456 kfree(cls_flower.rule); 2457 2458 if (err) { 2459 __fl_put(f); 2460 return err; 2461 } 2462 next_flow: 2463 __fl_put(f); 2464 } 2465 2466 return 0; 2467 } 2468 2469 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2470 { 2471 struct flow_cls_offload *cls_flower = type_data; 2472 struct cls_fl_filter *f = 2473 (struct cls_fl_filter *) cls_flower->cookie; 2474 struct cls_fl_head *head = fl_head_dereference(tp); 2475 2476 spin_lock(&tp->lock); 2477 list_add(&f->hw_list, &head->hw_filters); 2478 spin_unlock(&tp->lock); 2479 } 2480 2481 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2482 { 2483 struct flow_cls_offload *cls_flower = type_data; 2484 struct cls_fl_filter *f = 2485 (struct cls_fl_filter *) cls_flower->cookie; 2486 2487 spin_lock(&tp->lock); 2488 if (!list_empty(&f->hw_list)) 2489 list_del_init(&f->hw_list); 2490 spin_unlock(&tp->lock); 2491 } 2492 2493 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2494 struct fl_flow_tmplt *tmplt) 2495 { 2496 struct flow_cls_offload cls_flower = {}; 2497 struct tcf_block *block = chain->block; 2498 2499 cls_flower.rule = flow_rule_alloc(0); 2500 if (!cls_flower.rule) 2501 return -ENOMEM; 2502 2503 cls_flower.common.chain_index = chain->index; 2504 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2505 cls_flower.cookie = (unsigned long) tmplt; 2506 cls_flower.rule->match.dissector = &tmplt->dissector; 2507 cls_flower.rule->match.mask = &tmplt->mask; 2508 cls_flower.rule->match.key = &tmplt->dummy_key; 2509 2510 /* We don't care if driver (any of them) fails to handle this 2511 * call. It serves just as a hint for it. 2512 */ 2513 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2514 kfree(cls_flower.rule); 2515 2516 return 0; 2517 } 2518 2519 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2520 struct fl_flow_tmplt *tmplt) 2521 { 2522 struct flow_cls_offload cls_flower = {}; 2523 struct tcf_block *block = chain->block; 2524 2525 cls_flower.common.chain_index = chain->index; 2526 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2527 cls_flower.cookie = (unsigned long) tmplt; 2528 2529 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2530 } 2531 2532 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2533 struct nlattr **tca, 2534 struct netlink_ext_ack *extack) 2535 { 2536 struct fl_flow_tmplt *tmplt; 2537 struct nlattr **tb; 2538 int err; 2539 2540 if (!tca[TCA_OPTIONS]) 2541 return ERR_PTR(-EINVAL); 2542 2543 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2544 if (!tb) 2545 return ERR_PTR(-ENOBUFS); 2546 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2547 tca[TCA_OPTIONS], fl_policy, NULL); 2548 if (err) 2549 goto errout_tb; 2550 2551 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2552 if (!tmplt) { 2553 err = -ENOMEM; 2554 goto errout_tb; 2555 } 2556 tmplt->chain = chain; 2557 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2558 if (err) 2559 goto errout_tmplt; 2560 2561 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2562 2563 err = fl_hw_create_tmplt(chain, tmplt); 2564 if (err) 2565 goto errout_tmplt; 2566 2567 kfree(tb); 2568 return tmplt; 2569 2570 errout_tmplt: 2571 kfree(tmplt); 2572 errout_tb: 2573 kfree(tb); 2574 return ERR_PTR(err); 2575 } 2576 2577 static void fl_tmplt_destroy(void *tmplt_priv) 2578 { 2579 struct fl_flow_tmplt *tmplt = tmplt_priv; 2580 2581 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2582 kfree(tmplt); 2583 } 2584 2585 static int fl_dump_key_val(struct sk_buff *skb, 2586 void *val, int val_type, 2587 void *mask, int mask_type, int len) 2588 { 2589 int err; 2590 2591 if (!memchr_inv(mask, 0, len)) 2592 return 0; 2593 err = nla_put(skb, val_type, len, val); 2594 if (err) 2595 return err; 2596 if (mask_type != TCA_FLOWER_UNSPEC) { 2597 err = nla_put(skb, mask_type, len, mask); 2598 if (err) 2599 return err; 2600 } 2601 return 0; 2602 } 2603 2604 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2605 struct fl_flow_key *mask) 2606 { 2607 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2608 TCA_FLOWER_KEY_PORT_DST_MIN, 2609 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2610 sizeof(key->tp_range.tp_min.dst)) || 2611 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2612 TCA_FLOWER_KEY_PORT_DST_MAX, 2613 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2614 sizeof(key->tp_range.tp_max.dst)) || 2615 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2616 TCA_FLOWER_KEY_PORT_SRC_MIN, 2617 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2618 sizeof(key->tp_range.tp_min.src)) || 2619 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2620 TCA_FLOWER_KEY_PORT_SRC_MAX, 2621 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2622 sizeof(key->tp_range.tp_max.src))) 2623 return -1; 2624 2625 return 0; 2626 } 2627 2628 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2629 struct flow_dissector_key_mpls *mpls_key, 2630 struct flow_dissector_key_mpls *mpls_mask, 2631 u8 lse_index) 2632 { 2633 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2634 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2635 int err; 2636 2637 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2638 lse_index + 1); 2639 if (err) 2640 return err; 2641 2642 if (lse_mask->mpls_ttl) { 2643 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2644 lse_key->mpls_ttl); 2645 if (err) 2646 return err; 2647 } 2648 if (lse_mask->mpls_bos) { 2649 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2650 lse_key->mpls_bos); 2651 if (err) 2652 return err; 2653 } 2654 if (lse_mask->mpls_tc) { 2655 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2656 lse_key->mpls_tc); 2657 if (err) 2658 return err; 2659 } 2660 if (lse_mask->mpls_label) { 2661 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2662 lse_key->mpls_label); 2663 if (err) 2664 return err; 2665 } 2666 2667 return 0; 2668 } 2669 2670 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2671 struct flow_dissector_key_mpls *mpls_key, 2672 struct flow_dissector_key_mpls *mpls_mask) 2673 { 2674 struct nlattr *opts; 2675 struct nlattr *lse; 2676 u8 lse_index; 2677 int err; 2678 2679 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2680 if (!opts) 2681 return -EMSGSIZE; 2682 2683 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2684 if (!(mpls_mask->used_lses & 1 << lse_index)) 2685 continue; 2686 2687 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2688 if (!lse) { 2689 err = -EMSGSIZE; 2690 goto err_opts; 2691 } 2692 2693 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2694 lse_index); 2695 if (err) 2696 goto err_opts_lse; 2697 nla_nest_end(skb, lse); 2698 } 2699 nla_nest_end(skb, opts); 2700 2701 return 0; 2702 2703 err_opts_lse: 2704 nla_nest_cancel(skb, lse); 2705 err_opts: 2706 nla_nest_cancel(skb, opts); 2707 2708 return err; 2709 } 2710 2711 static int fl_dump_key_mpls(struct sk_buff *skb, 2712 struct flow_dissector_key_mpls *mpls_key, 2713 struct flow_dissector_key_mpls *mpls_mask) 2714 { 2715 struct flow_dissector_mpls_lse *lse_mask; 2716 struct flow_dissector_mpls_lse *lse_key; 2717 int err; 2718 2719 if (!mpls_mask->used_lses) 2720 return 0; 2721 2722 lse_mask = &mpls_mask->ls[0]; 2723 lse_key = &mpls_key->ls[0]; 2724 2725 /* For backward compatibility, don't use the MPLS nested attributes if 2726 * the rule can be expressed using the old attributes. 2727 */ 2728 if (mpls_mask->used_lses & ~1 || 2729 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2730 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2731 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2732 2733 if (lse_mask->mpls_ttl) { 2734 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2735 lse_key->mpls_ttl); 2736 if (err) 2737 return err; 2738 } 2739 if (lse_mask->mpls_tc) { 2740 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2741 lse_key->mpls_tc); 2742 if (err) 2743 return err; 2744 } 2745 if (lse_mask->mpls_label) { 2746 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2747 lse_key->mpls_label); 2748 if (err) 2749 return err; 2750 } 2751 if (lse_mask->mpls_bos) { 2752 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2753 lse_key->mpls_bos); 2754 if (err) 2755 return err; 2756 } 2757 return 0; 2758 } 2759 2760 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2761 struct flow_dissector_key_ip *key, 2762 struct flow_dissector_key_ip *mask) 2763 { 2764 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2765 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2766 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2767 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2768 2769 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2770 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2771 return -1; 2772 2773 return 0; 2774 } 2775 2776 static int fl_dump_key_vlan(struct sk_buff *skb, 2777 int vlan_id_key, int vlan_prio_key, 2778 struct flow_dissector_key_vlan *vlan_key, 2779 struct flow_dissector_key_vlan *vlan_mask) 2780 { 2781 int err; 2782 2783 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2784 return 0; 2785 if (vlan_mask->vlan_id) { 2786 err = nla_put_u16(skb, vlan_id_key, 2787 vlan_key->vlan_id); 2788 if (err) 2789 return err; 2790 } 2791 if (vlan_mask->vlan_priority) { 2792 err = nla_put_u8(skb, vlan_prio_key, 2793 vlan_key->vlan_priority); 2794 if (err) 2795 return err; 2796 } 2797 return 0; 2798 } 2799 2800 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2801 u32 *flower_key, u32 *flower_mask, 2802 u32 flower_flag_bit, u32 dissector_flag_bit) 2803 { 2804 if (dissector_mask & dissector_flag_bit) { 2805 *flower_mask |= flower_flag_bit; 2806 if (dissector_key & dissector_flag_bit) 2807 *flower_key |= flower_flag_bit; 2808 } 2809 } 2810 2811 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2812 { 2813 u32 key, mask; 2814 __be32 _key, _mask; 2815 int err; 2816 2817 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2818 return 0; 2819 2820 key = 0; 2821 mask = 0; 2822 2823 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2824 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2825 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2826 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2827 FLOW_DIS_FIRST_FRAG); 2828 2829 _key = cpu_to_be32(key); 2830 _mask = cpu_to_be32(mask); 2831 2832 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2833 if (err) 2834 return err; 2835 2836 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2837 } 2838 2839 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2840 struct flow_dissector_key_enc_opts *enc_opts) 2841 { 2842 struct geneve_opt *opt; 2843 struct nlattr *nest; 2844 int opt_off = 0; 2845 2846 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2847 if (!nest) 2848 goto nla_put_failure; 2849 2850 while (enc_opts->len > opt_off) { 2851 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2852 2853 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2854 opt->opt_class)) 2855 goto nla_put_failure; 2856 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2857 opt->type)) 2858 goto nla_put_failure; 2859 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2860 opt->length * 4, opt->opt_data)) 2861 goto nla_put_failure; 2862 2863 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2864 } 2865 nla_nest_end(skb, nest); 2866 return 0; 2867 2868 nla_put_failure: 2869 nla_nest_cancel(skb, nest); 2870 return -EMSGSIZE; 2871 } 2872 2873 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2874 struct flow_dissector_key_enc_opts *enc_opts) 2875 { 2876 struct vxlan_metadata *md; 2877 struct nlattr *nest; 2878 2879 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2880 if (!nest) 2881 goto nla_put_failure; 2882 2883 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2884 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2885 goto nla_put_failure; 2886 2887 nla_nest_end(skb, nest); 2888 return 0; 2889 2890 nla_put_failure: 2891 nla_nest_cancel(skb, nest); 2892 return -EMSGSIZE; 2893 } 2894 2895 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2896 struct flow_dissector_key_enc_opts *enc_opts) 2897 { 2898 struct erspan_metadata *md; 2899 struct nlattr *nest; 2900 2901 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2902 if (!nest) 2903 goto nla_put_failure; 2904 2905 md = (struct erspan_metadata *)&enc_opts->data[0]; 2906 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2907 goto nla_put_failure; 2908 2909 if (md->version == 1 && 2910 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2911 goto nla_put_failure; 2912 2913 if (md->version == 2 && 2914 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2915 md->u.md2.dir) || 2916 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2917 get_hwid(&md->u.md2)))) 2918 goto nla_put_failure; 2919 2920 nla_nest_end(skb, nest); 2921 return 0; 2922 2923 nla_put_failure: 2924 nla_nest_cancel(skb, nest); 2925 return -EMSGSIZE; 2926 } 2927 2928 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 2929 struct flow_dissector_key_enc_opts *enc_opts) 2930 2931 { 2932 struct gtp_pdu_session_info *session_info; 2933 struct nlattr *nest; 2934 2935 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 2936 if (!nest) 2937 goto nla_put_failure; 2938 2939 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 2940 2941 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 2942 session_info->pdu_type)) 2943 goto nla_put_failure; 2944 2945 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 2946 goto nla_put_failure; 2947 2948 nla_nest_end(skb, nest); 2949 return 0; 2950 2951 nla_put_failure: 2952 nla_nest_cancel(skb, nest); 2953 return -EMSGSIZE; 2954 } 2955 2956 static int fl_dump_key_ct(struct sk_buff *skb, 2957 struct flow_dissector_key_ct *key, 2958 struct flow_dissector_key_ct *mask) 2959 { 2960 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2961 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2962 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2963 sizeof(key->ct_state))) 2964 goto nla_put_failure; 2965 2966 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2967 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2968 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2969 sizeof(key->ct_zone))) 2970 goto nla_put_failure; 2971 2972 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2973 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2974 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2975 sizeof(key->ct_mark))) 2976 goto nla_put_failure; 2977 2978 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2979 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2980 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2981 sizeof(key->ct_labels))) 2982 goto nla_put_failure; 2983 2984 return 0; 2985 2986 nla_put_failure: 2987 return -EMSGSIZE; 2988 } 2989 2990 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2991 struct flow_dissector_key_enc_opts *enc_opts) 2992 { 2993 struct nlattr *nest; 2994 int err; 2995 2996 if (!enc_opts->len) 2997 return 0; 2998 2999 nest = nla_nest_start_noflag(skb, enc_opt_type); 3000 if (!nest) 3001 goto nla_put_failure; 3002 3003 switch (enc_opts->dst_opt_type) { 3004 case TUNNEL_GENEVE_OPT: 3005 err = fl_dump_key_geneve_opt(skb, enc_opts); 3006 if (err) 3007 goto nla_put_failure; 3008 break; 3009 case TUNNEL_VXLAN_OPT: 3010 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3011 if (err) 3012 goto nla_put_failure; 3013 break; 3014 case TUNNEL_ERSPAN_OPT: 3015 err = fl_dump_key_erspan_opt(skb, enc_opts); 3016 if (err) 3017 goto nla_put_failure; 3018 break; 3019 case TUNNEL_GTP_OPT: 3020 err = fl_dump_key_gtp_opt(skb, enc_opts); 3021 if (err) 3022 goto nla_put_failure; 3023 break; 3024 default: 3025 goto nla_put_failure; 3026 } 3027 nla_nest_end(skb, nest); 3028 return 0; 3029 3030 nla_put_failure: 3031 nla_nest_cancel(skb, nest); 3032 return -EMSGSIZE; 3033 } 3034 3035 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3036 struct flow_dissector_key_enc_opts *key_opts, 3037 struct flow_dissector_key_enc_opts *msk_opts) 3038 { 3039 int err; 3040 3041 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3042 if (err) 3043 return err; 3044 3045 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3046 } 3047 3048 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3049 struct fl_flow_key *key, struct fl_flow_key *mask) 3050 { 3051 if (mask->meta.ingress_ifindex) { 3052 struct net_device *dev; 3053 3054 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3055 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3056 goto nla_put_failure; 3057 } 3058 3059 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3060 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3061 sizeof(key->eth.dst)) || 3062 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3063 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3064 sizeof(key->eth.src)) || 3065 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3066 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3067 sizeof(key->basic.n_proto))) 3068 goto nla_put_failure; 3069 3070 if (mask->num_of_vlans.num_of_vlans) { 3071 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3072 goto nla_put_failure; 3073 } 3074 3075 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3076 goto nla_put_failure; 3077 3078 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3079 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3080 goto nla_put_failure; 3081 3082 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3083 TCA_FLOWER_KEY_CVLAN_PRIO, 3084 &key->cvlan, &mask->cvlan) || 3085 (mask->cvlan.vlan_tpid && 3086 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3087 key->cvlan.vlan_tpid))) 3088 goto nla_put_failure; 3089 3090 if (mask->basic.n_proto) { 3091 if (mask->cvlan.vlan_eth_type) { 3092 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3093 key->basic.n_proto)) 3094 goto nla_put_failure; 3095 } else if (mask->vlan.vlan_eth_type) { 3096 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3097 key->vlan.vlan_eth_type)) 3098 goto nla_put_failure; 3099 } 3100 } 3101 3102 if ((key->basic.n_proto == htons(ETH_P_IP) || 3103 key->basic.n_proto == htons(ETH_P_IPV6)) && 3104 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3105 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3106 sizeof(key->basic.ip_proto)) || 3107 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3108 goto nla_put_failure; 3109 3110 if (mask->pppoe.session_id) { 3111 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3112 key->pppoe.session_id)) 3113 goto nla_put_failure; 3114 } 3115 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3116 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3117 key->pppoe.ppp_proto)) 3118 goto nla_put_failure; 3119 } 3120 3121 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3122 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3123 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3124 sizeof(key->ipv4.src)) || 3125 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3126 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3127 sizeof(key->ipv4.dst)))) 3128 goto nla_put_failure; 3129 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3130 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3131 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3132 sizeof(key->ipv6.src)) || 3133 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3134 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3135 sizeof(key->ipv6.dst)))) 3136 goto nla_put_failure; 3137 3138 if (key->basic.ip_proto == IPPROTO_TCP && 3139 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3140 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3141 sizeof(key->tp.src)) || 3142 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3143 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3144 sizeof(key->tp.dst)) || 3145 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3146 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3147 sizeof(key->tcp.flags)))) 3148 goto nla_put_failure; 3149 else if (key->basic.ip_proto == IPPROTO_UDP && 3150 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3151 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3152 sizeof(key->tp.src)) || 3153 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3154 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3155 sizeof(key->tp.dst)))) 3156 goto nla_put_failure; 3157 else if (key->basic.ip_proto == IPPROTO_SCTP && 3158 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3159 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3160 sizeof(key->tp.src)) || 3161 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3162 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3163 sizeof(key->tp.dst)))) 3164 goto nla_put_failure; 3165 else if (key->basic.n_proto == htons(ETH_P_IP) && 3166 key->basic.ip_proto == IPPROTO_ICMP && 3167 (fl_dump_key_val(skb, &key->icmp.type, 3168 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3169 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3170 sizeof(key->icmp.type)) || 3171 fl_dump_key_val(skb, &key->icmp.code, 3172 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3173 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3174 sizeof(key->icmp.code)))) 3175 goto nla_put_failure; 3176 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3177 key->basic.ip_proto == IPPROTO_ICMPV6 && 3178 (fl_dump_key_val(skb, &key->icmp.type, 3179 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3180 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3181 sizeof(key->icmp.type)) || 3182 fl_dump_key_val(skb, &key->icmp.code, 3183 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3184 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3185 sizeof(key->icmp.code)))) 3186 goto nla_put_failure; 3187 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3188 key->basic.n_proto == htons(ETH_P_RARP)) && 3189 (fl_dump_key_val(skb, &key->arp.sip, 3190 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3191 TCA_FLOWER_KEY_ARP_SIP_MASK, 3192 sizeof(key->arp.sip)) || 3193 fl_dump_key_val(skb, &key->arp.tip, 3194 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3195 TCA_FLOWER_KEY_ARP_TIP_MASK, 3196 sizeof(key->arp.tip)) || 3197 fl_dump_key_val(skb, &key->arp.op, 3198 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3199 TCA_FLOWER_KEY_ARP_OP_MASK, 3200 sizeof(key->arp.op)) || 3201 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3202 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3203 sizeof(key->arp.sha)) || 3204 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3205 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3206 sizeof(key->arp.tha)))) 3207 goto nla_put_failure; 3208 else if (key->basic.ip_proto == IPPROTO_L2TP && 3209 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3210 TCA_FLOWER_KEY_L2TPV3_SID, 3211 &mask->l2tpv3.session_id, 3212 TCA_FLOWER_UNSPEC, 3213 sizeof(key->l2tpv3.session_id))) 3214 goto nla_put_failure; 3215 3216 if ((key->basic.ip_proto == IPPROTO_TCP || 3217 key->basic.ip_proto == IPPROTO_UDP || 3218 key->basic.ip_proto == IPPROTO_SCTP) && 3219 fl_dump_key_port_range(skb, key, mask)) 3220 goto nla_put_failure; 3221 3222 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3223 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3224 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3225 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3226 sizeof(key->enc_ipv4.src)) || 3227 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3228 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3229 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3230 sizeof(key->enc_ipv4.dst)))) 3231 goto nla_put_failure; 3232 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3233 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3234 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3235 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3236 sizeof(key->enc_ipv6.src)) || 3237 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3238 TCA_FLOWER_KEY_ENC_IPV6_DST, 3239 &mask->enc_ipv6.dst, 3240 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3241 sizeof(key->enc_ipv6.dst)))) 3242 goto nla_put_failure; 3243 3244 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3245 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3246 sizeof(key->enc_key_id)) || 3247 fl_dump_key_val(skb, &key->enc_tp.src, 3248 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3249 &mask->enc_tp.src, 3250 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3251 sizeof(key->enc_tp.src)) || 3252 fl_dump_key_val(skb, &key->enc_tp.dst, 3253 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3254 &mask->enc_tp.dst, 3255 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3256 sizeof(key->enc_tp.dst)) || 3257 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3258 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3259 goto nla_put_failure; 3260 3261 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3262 goto nla_put_failure; 3263 3264 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3265 goto nla_put_failure; 3266 3267 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3268 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3269 sizeof(key->hash.hash))) 3270 goto nla_put_failure; 3271 3272 return 0; 3273 3274 nla_put_failure: 3275 return -EMSGSIZE; 3276 } 3277 3278 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3279 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3280 { 3281 struct cls_fl_filter *f = fh; 3282 struct nlattr *nest; 3283 struct fl_flow_key *key, *mask; 3284 bool skip_hw; 3285 3286 if (!f) 3287 return skb->len; 3288 3289 t->tcm_handle = f->handle; 3290 3291 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3292 if (!nest) 3293 goto nla_put_failure; 3294 3295 spin_lock(&tp->lock); 3296 3297 if (f->res.classid && 3298 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3299 goto nla_put_failure_locked; 3300 3301 key = &f->key; 3302 mask = &f->mask->key; 3303 skip_hw = tc_skip_hw(f->flags); 3304 3305 if (fl_dump_key(skb, net, key, mask)) 3306 goto nla_put_failure_locked; 3307 3308 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3309 goto nla_put_failure_locked; 3310 3311 spin_unlock(&tp->lock); 3312 3313 if (!skip_hw) 3314 fl_hw_update_stats(tp, f, rtnl_held); 3315 3316 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3317 goto nla_put_failure; 3318 3319 if (tcf_exts_dump(skb, &f->exts)) 3320 goto nla_put_failure; 3321 3322 nla_nest_end(skb, nest); 3323 3324 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3325 goto nla_put_failure; 3326 3327 return skb->len; 3328 3329 nla_put_failure_locked: 3330 spin_unlock(&tp->lock); 3331 nla_put_failure: 3332 nla_nest_cancel(skb, nest); 3333 return -1; 3334 } 3335 3336 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3337 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3338 { 3339 struct cls_fl_filter *f = fh; 3340 struct nlattr *nest; 3341 bool skip_hw; 3342 3343 if (!f) 3344 return skb->len; 3345 3346 t->tcm_handle = f->handle; 3347 3348 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3349 if (!nest) 3350 goto nla_put_failure; 3351 3352 spin_lock(&tp->lock); 3353 3354 skip_hw = tc_skip_hw(f->flags); 3355 3356 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3357 goto nla_put_failure_locked; 3358 3359 spin_unlock(&tp->lock); 3360 3361 if (!skip_hw) 3362 fl_hw_update_stats(tp, f, rtnl_held); 3363 3364 if (tcf_exts_terse_dump(skb, &f->exts)) 3365 goto nla_put_failure; 3366 3367 nla_nest_end(skb, nest); 3368 3369 return skb->len; 3370 3371 nla_put_failure_locked: 3372 spin_unlock(&tp->lock); 3373 nla_put_failure: 3374 nla_nest_cancel(skb, nest); 3375 return -1; 3376 } 3377 3378 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3379 { 3380 struct fl_flow_tmplt *tmplt = tmplt_priv; 3381 struct fl_flow_key *key, *mask; 3382 struct nlattr *nest; 3383 3384 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3385 if (!nest) 3386 goto nla_put_failure; 3387 3388 key = &tmplt->dummy_key; 3389 mask = &tmplt->mask; 3390 3391 if (fl_dump_key(skb, net, key, mask)) 3392 goto nla_put_failure; 3393 3394 nla_nest_end(skb, nest); 3395 3396 return skb->len; 3397 3398 nla_put_failure: 3399 nla_nest_cancel(skb, nest); 3400 return -EMSGSIZE; 3401 } 3402 3403 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3404 unsigned long base) 3405 { 3406 struct cls_fl_filter *f = fh; 3407 3408 tc_cls_bind_class(classid, cl, q, &f->res, base); 3409 } 3410 3411 static bool fl_delete_empty(struct tcf_proto *tp) 3412 { 3413 struct cls_fl_head *head = fl_head_dereference(tp); 3414 3415 spin_lock(&tp->lock); 3416 tp->deleting = idr_is_empty(&head->handle_idr); 3417 spin_unlock(&tp->lock); 3418 3419 return tp->deleting; 3420 } 3421 3422 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3423 .kind = "flower", 3424 .classify = fl_classify, 3425 .init = fl_init, 3426 .destroy = fl_destroy, 3427 .get = fl_get, 3428 .put = fl_put, 3429 .change = fl_change, 3430 .delete = fl_delete, 3431 .delete_empty = fl_delete_empty, 3432 .walk = fl_walk, 3433 .reoffload = fl_reoffload, 3434 .hw_add = fl_hw_add, 3435 .hw_del = fl_hw_del, 3436 .dump = fl_dump, 3437 .terse_dump = fl_terse_dump, 3438 .bind_class = fl_bind_class, 3439 .tmplt_create = fl_tmplt_create, 3440 .tmplt_destroy = fl_tmplt_destroy, 3441 .tmplt_dump = fl_tmplt_dump, 3442 .owner = THIS_MODULE, 3443 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3444 }; 3445 3446 static int __init cls_fl_init(void) 3447 { 3448 return register_tcf_proto_ops(&cls_fl_ops); 3449 } 3450 3451 static void __exit cls_fl_exit(void) 3452 { 3453 unregister_tcf_proto_ops(&cls_fl_ops); 3454 } 3455 3456 module_init(cls_fl_init); 3457 module_exit(cls_fl_exit); 3458 3459 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3460 MODULE_DESCRIPTION("Flower classifier"); 3461 MODULE_LICENSE("GPL v2"); 3462