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 #include <linux/bitfield.h> 15 16 #include <linux/if_ether.h> 17 #include <linux/in6.h> 18 #include <linux/ip.h> 19 #include <linux/mpls.h> 20 #include <linux/ppp_defs.h> 21 22 #include <net/sch_generic.h> 23 #include <net/pkt_cls.h> 24 #include <net/pkt_sched.h> 25 #include <net/ip.h> 26 #include <net/flow_dissector.h> 27 #include <net/geneve.h> 28 #include <net/vxlan.h> 29 #include <net/erspan.h> 30 #include <net/gtp.h> 31 #include <net/tc_wrapper.h> 32 33 #include <net/dst.h> 34 #include <net/dst_metadata.h> 35 36 #include <uapi/linux/netfilter/nf_conntrack_common.h> 37 38 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 39 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 40 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 41 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 42 43 struct fl_flow_key { 44 struct flow_dissector_key_meta meta; 45 struct flow_dissector_key_control control; 46 struct flow_dissector_key_control enc_control; 47 struct flow_dissector_key_basic basic; 48 struct flow_dissector_key_eth_addrs eth; 49 struct flow_dissector_key_vlan vlan; 50 struct flow_dissector_key_vlan cvlan; 51 union { 52 struct flow_dissector_key_ipv4_addrs ipv4; 53 struct flow_dissector_key_ipv6_addrs ipv6; 54 }; 55 struct flow_dissector_key_ports tp; 56 struct flow_dissector_key_icmp icmp; 57 struct flow_dissector_key_arp arp; 58 struct flow_dissector_key_keyid enc_key_id; 59 union { 60 struct flow_dissector_key_ipv4_addrs enc_ipv4; 61 struct flow_dissector_key_ipv6_addrs enc_ipv6; 62 }; 63 struct flow_dissector_key_ports enc_tp; 64 struct flow_dissector_key_mpls mpls; 65 struct flow_dissector_key_tcp tcp; 66 struct flow_dissector_key_ip ip; 67 struct flow_dissector_key_ip enc_ip; 68 struct flow_dissector_key_enc_opts enc_opts; 69 struct flow_dissector_key_ports_range tp_range; 70 struct flow_dissector_key_ct ct; 71 struct flow_dissector_key_hash hash; 72 struct flow_dissector_key_num_of_vlans num_of_vlans; 73 struct flow_dissector_key_pppoe pppoe; 74 struct flow_dissector_key_l2tpv3 l2tpv3; 75 struct flow_dissector_key_ipsec ipsec; 76 struct flow_dissector_key_cfm cfm; 77 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 78 79 struct fl_flow_mask_range { 80 unsigned short int start; 81 unsigned short int end; 82 }; 83 84 struct fl_flow_mask { 85 struct fl_flow_key key; 86 struct fl_flow_mask_range range; 87 u32 flags; 88 struct rhash_head ht_node; 89 struct rhashtable ht; 90 struct rhashtable_params filter_ht_params; 91 struct flow_dissector dissector; 92 struct list_head filters; 93 struct rcu_work rwork; 94 struct list_head list; 95 refcount_t refcnt; 96 }; 97 98 struct fl_flow_tmplt { 99 struct fl_flow_key dummy_key; 100 struct fl_flow_key mask; 101 struct flow_dissector dissector; 102 struct tcf_chain *chain; 103 }; 104 105 struct cls_fl_head { 106 struct rhashtable ht; 107 spinlock_t masks_lock; /* Protect masks list */ 108 struct list_head masks; 109 struct list_head hw_filters; 110 struct rcu_work rwork; 111 struct idr handle_idr; 112 }; 113 114 struct cls_fl_filter { 115 struct fl_flow_mask *mask; 116 struct rhash_head ht_node; 117 struct fl_flow_key mkey; 118 struct tcf_exts exts; 119 struct tcf_result res; 120 struct fl_flow_key key; 121 struct list_head list; 122 struct list_head hw_list; 123 u32 handle; 124 u32 flags; 125 u32 in_hw_count; 126 u8 needs_tc_skb_ext:1; 127 struct rcu_work rwork; 128 struct net_device *hw_dev; 129 /* Flower classifier is unlocked, which means that its reference counter 130 * can be changed concurrently without any kind of external 131 * synchronization. Use atomic reference counter to be concurrency-safe. 132 */ 133 refcount_t refcnt; 134 bool deleted; 135 }; 136 137 static const struct rhashtable_params mask_ht_params = { 138 .key_offset = offsetof(struct fl_flow_mask, key), 139 .key_len = sizeof(struct fl_flow_key), 140 .head_offset = offsetof(struct fl_flow_mask, ht_node), 141 .automatic_shrinking = true, 142 }; 143 144 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 145 { 146 return mask->range.end - mask->range.start; 147 } 148 149 static void fl_mask_update_range(struct fl_flow_mask *mask) 150 { 151 const u8 *bytes = (const u8 *) &mask->key; 152 size_t size = sizeof(mask->key); 153 size_t i, first = 0, last; 154 155 for (i = 0; i < size; i++) { 156 if (bytes[i]) { 157 first = i; 158 break; 159 } 160 } 161 last = first; 162 for (i = size - 1; i != first; i--) { 163 if (bytes[i]) { 164 last = i; 165 break; 166 } 167 } 168 mask->range.start = rounddown(first, sizeof(long)); 169 mask->range.end = roundup(last + 1, sizeof(long)); 170 } 171 172 static void *fl_key_get_start(struct fl_flow_key *key, 173 const struct fl_flow_mask *mask) 174 { 175 return (u8 *) key + mask->range.start; 176 } 177 178 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 179 struct fl_flow_mask *mask) 180 { 181 const long *lkey = fl_key_get_start(key, mask); 182 const long *lmask = fl_key_get_start(&mask->key, mask); 183 long *lmkey = fl_key_get_start(mkey, mask); 184 int i; 185 186 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 187 *lmkey++ = *lkey++ & *lmask++; 188 } 189 190 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 191 struct fl_flow_mask *mask) 192 { 193 const long *lmask = fl_key_get_start(&mask->key, mask); 194 const long *ltmplt; 195 int i; 196 197 if (!tmplt) 198 return true; 199 ltmplt = fl_key_get_start(&tmplt->mask, mask); 200 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 201 if (~*ltmplt++ & *lmask++) 202 return false; 203 } 204 return true; 205 } 206 207 static void fl_clear_masked_range(struct fl_flow_key *key, 208 struct fl_flow_mask *mask) 209 { 210 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 211 } 212 213 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 214 struct fl_flow_key *key, 215 struct fl_flow_key *mkey) 216 { 217 u16 min_mask, max_mask, min_val, max_val; 218 219 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 220 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 221 min_val = ntohs(filter->key.tp_range.tp_min.dst); 222 max_val = ntohs(filter->key.tp_range.tp_max.dst); 223 224 if (min_mask && max_mask) { 225 if (ntohs(key->tp_range.tp.dst) < min_val || 226 ntohs(key->tp_range.tp.dst) > max_val) 227 return false; 228 229 /* skb does not have min and max values */ 230 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 231 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 232 } 233 return true; 234 } 235 236 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 237 struct fl_flow_key *key, 238 struct fl_flow_key *mkey) 239 { 240 u16 min_mask, max_mask, min_val, max_val; 241 242 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 243 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 244 min_val = ntohs(filter->key.tp_range.tp_min.src); 245 max_val = ntohs(filter->key.tp_range.tp_max.src); 246 247 if (min_mask && max_mask) { 248 if (ntohs(key->tp_range.tp.src) < min_val || 249 ntohs(key->tp_range.tp.src) > max_val) 250 return false; 251 252 /* skb does not have min and max values */ 253 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 254 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 255 } 256 return true; 257 } 258 259 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 260 struct fl_flow_key *mkey) 261 { 262 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 263 mask->filter_ht_params); 264 } 265 266 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 267 struct fl_flow_key *mkey, 268 struct fl_flow_key *key) 269 { 270 struct cls_fl_filter *filter, *f; 271 272 list_for_each_entry_rcu(filter, &mask->filters, list) { 273 if (!fl_range_port_dst_cmp(filter, key, mkey)) 274 continue; 275 276 if (!fl_range_port_src_cmp(filter, key, mkey)) 277 continue; 278 279 f = __fl_lookup(mask, mkey); 280 if (f) 281 return f; 282 } 283 return NULL; 284 } 285 286 static noinline_for_stack 287 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 288 { 289 struct fl_flow_key mkey; 290 291 fl_set_masked_key(&mkey, key, mask); 292 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 293 return fl_lookup_range(mask, &mkey, key); 294 295 return __fl_lookup(mask, &mkey); 296 } 297 298 static u16 fl_ct_info_to_flower_map[] = { 299 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 300 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 301 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 302 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 303 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 304 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 305 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 306 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 307 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 308 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 309 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 310 TCA_FLOWER_KEY_CT_FLAGS_NEW, 311 }; 312 313 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb, 314 const struct tcf_proto *tp, 315 struct tcf_result *res) 316 { 317 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 318 bool post_ct = tc_skb_cb(skb)->post_ct; 319 u16 zone = tc_skb_cb(skb)->zone; 320 struct fl_flow_key skb_key; 321 struct fl_flow_mask *mask; 322 struct cls_fl_filter *f; 323 324 list_for_each_entry_rcu(mask, &head->masks, list) { 325 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 326 fl_clear_masked_range(&skb_key, mask); 327 328 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 329 /* skb_flow_dissect() does not set n_proto in case an unknown 330 * protocol, so do it rather here. 331 */ 332 skb_key.basic.n_proto = skb_protocol(skb, false); 333 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 334 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 335 fl_ct_info_to_flower_map, 336 ARRAY_SIZE(fl_ct_info_to_flower_map), 337 post_ct, zone); 338 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 339 skb_flow_dissect(skb, &mask->dissector, &skb_key, 340 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); 341 342 f = fl_mask_lookup(mask, &skb_key); 343 if (f && !tc_skip_sw(f->flags)) { 344 *res = f->res; 345 return tcf_exts_exec(skb, &f->exts, res); 346 } 347 } 348 return -1; 349 } 350 351 static int fl_init(struct tcf_proto *tp) 352 { 353 struct cls_fl_head *head; 354 355 head = kzalloc(sizeof(*head), GFP_KERNEL); 356 if (!head) 357 return -ENOBUFS; 358 359 spin_lock_init(&head->masks_lock); 360 INIT_LIST_HEAD_RCU(&head->masks); 361 INIT_LIST_HEAD(&head->hw_filters); 362 rcu_assign_pointer(tp->root, head); 363 idr_init(&head->handle_idr); 364 365 return rhashtable_init(&head->ht, &mask_ht_params); 366 } 367 368 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 369 { 370 /* temporary masks don't have their filters list and ht initialized */ 371 if (mask_init_done) { 372 WARN_ON(!list_empty(&mask->filters)); 373 rhashtable_destroy(&mask->ht); 374 } 375 kfree(mask); 376 } 377 378 static void fl_mask_free_work(struct work_struct *work) 379 { 380 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 381 struct fl_flow_mask, rwork); 382 383 fl_mask_free(mask, true); 384 } 385 386 static void fl_uninit_mask_free_work(struct work_struct *work) 387 { 388 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 389 struct fl_flow_mask, rwork); 390 391 fl_mask_free(mask, false); 392 } 393 394 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 395 { 396 if (!refcount_dec_and_test(&mask->refcnt)) 397 return false; 398 399 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 400 401 spin_lock(&head->masks_lock); 402 list_del_rcu(&mask->list); 403 spin_unlock(&head->masks_lock); 404 405 tcf_queue_work(&mask->rwork, fl_mask_free_work); 406 407 return true; 408 } 409 410 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 411 { 412 /* Flower classifier only changes root pointer during init and destroy. 413 * Users must obtain reference to tcf_proto instance before calling its 414 * API, so tp->root pointer is protected from concurrent call to 415 * fl_destroy() by reference counting. 416 */ 417 return rcu_dereference_raw(tp->root); 418 } 419 420 static void __fl_destroy_filter(struct cls_fl_filter *f) 421 { 422 if (f->needs_tc_skb_ext) 423 tc_skb_ext_tc_disable(); 424 tcf_exts_destroy(&f->exts); 425 tcf_exts_put_net(&f->exts); 426 kfree(f); 427 } 428 429 static void fl_destroy_filter_work(struct work_struct *work) 430 { 431 struct cls_fl_filter *f = container_of(to_rcu_work(work), 432 struct cls_fl_filter, rwork); 433 434 __fl_destroy_filter(f); 435 } 436 437 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 438 bool rtnl_held, struct netlink_ext_ack *extack) 439 { 440 struct tcf_block *block = tp->chain->block; 441 struct flow_cls_offload cls_flower = {}; 442 443 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 444 cls_flower.command = FLOW_CLS_DESTROY; 445 cls_flower.cookie = (unsigned long) f; 446 447 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 448 &f->flags, &f->in_hw_count, rtnl_held); 449 450 } 451 452 static int fl_hw_replace_filter(struct tcf_proto *tp, 453 struct cls_fl_filter *f, bool rtnl_held, 454 struct netlink_ext_ack *extack) 455 { 456 struct tcf_block *block = tp->chain->block; 457 struct flow_cls_offload cls_flower = {}; 458 bool skip_sw = tc_skip_sw(f->flags); 459 int err = 0; 460 461 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 462 if (!cls_flower.rule) 463 return -ENOMEM; 464 465 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 466 cls_flower.command = FLOW_CLS_REPLACE; 467 cls_flower.cookie = (unsigned long) f; 468 cls_flower.rule->match.dissector = &f->mask->dissector; 469 cls_flower.rule->match.mask = &f->mask->key; 470 cls_flower.rule->match.key = &f->mkey; 471 cls_flower.classid = f->res.classid; 472 473 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 474 cls_flower.common.extack); 475 if (err) { 476 kfree(cls_flower.rule); 477 478 return skip_sw ? err : 0; 479 } 480 481 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 482 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 483 tc_cleanup_offload_action(&cls_flower.rule->action); 484 kfree(cls_flower.rule); 485 486 if (err) { 487 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 488 return err; 489 } 490 491 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 492 return -EINVAL; 493 494 return 0; 495 } 496 497 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 498 bool rtnl_held) 499 { 500 struct tcf_block *block = tp->chain->block; 501 struct flow_cls_offload cls_flower = {}; 502 503 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 504 cls_flower.command = FLOW_CLS_STATS; 505 cls_flower.cookie = (unsigned long) f; 506 cls_flower.classid = f->res.classid; 507 508 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 509 rtnl_held); 510 511 tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats); 512 } 513 514 static void __fl_put(struct cls_fl_filter *f) 515 { 516 if (!refcount_dec_and_test(&f->refcnt)) 517 return; 518 519 if (tcf_exts_get_net(&f->exts)) 520 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 521 else 522 __fl_destroy_filter(f); 523 } 524 525 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 526 { 527 struct cls_fl_filter *f; 528 529 rcu_read_lock(); 530 f = idr_find(&head->handle_idr, handle); 531 if (f && !refcount_inc_not_zero(&f->refcnt)) 532 f = NULL; 533 rcu_read_unlock(); 534 535 return f; 536 } 537 538 static struct tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle) 539 { 540 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 541 struct cls_fl_filter *f; 542 543 f = idr_find(&head->handle_idr, handle); 544 return f ? &f->exts : NULL; 545 } 546 547 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 548 bool *last, bool rtnl_held, 549 struct netlink_ext_ack *extack) 550 { 551 struct cls_fl_head *head = fl_head_dereference(tp); 552 553 *last = false; 554 555 spin_lock(&tp->lock); 556 if (f->deleted) { 557 spin_unlock(&tp->lock); 558 return -ENOENT; 559 } 560 561 f->deleted = true; 562 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 563 f->mask->filter_ht_params); 564 idr_remove(&head->handle_idr, f->handle); 565 list_del_rcu(&f->list); 566 spin_unlock(&tp->lock); 567 568 *last = fl_mask_put(head, f->mask); 569 if (!tc_skip_hw(f->flags)) 570 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 571 tcf_unbind_filter(tp, &f->res); 572 __fl_put(f); 573 574 return 0; 575 } 576 577 static void fl_destroy_sleepable(struct work_struct *work) 578 { 579 struct cls_fl_head *head = container_of(to_rcu_work(work), 580 struct cls_fl_head, 581 rwork); 582 583 rhashtable_destroy(&head->ht); 584 kfree(head); 585 module_put(THIS_MODULE); 586 } 587 588 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 589 struct netlink_ext_ack *extack) 590 { 591 struct cls_fl_head *head = fl_head_dereference(tp); 592 struct fl_flow_mask *mask, *next_mask; 593 struct cls_fl_filter *f, *next; 594 bool last; 595 596 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 597 list_for_each_entry_safe(f, next, &mask->filters, list) { 598 __fl_delete(tp, f, &last, rtnl_held, extack); 599 if (last) 600 break; 601 } 602 } 603 idr_destroy(&head->handle_idr); 604 605 __module_get(THIS_MODULE); 606 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 607 } 608 609 static void fl_put(struct tcf_proto *tp, void *arg) 610 { 611 struct cls_fl_filter *f = arg; 612 613 __fl_put(f); 614 } 615 616 static void *fl_get(struct tcf_proto *tp, u32 handle) 617 { 618 struct cls_fl_head *head = fl_head_dereference(tp); 619 620 return __fl_get(head, handle); 621 } 622 623 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 624 [TCA_FLOWER_UNSPEC] = { .strict_start_type = 625 TCA_FLOWER_L2_MISS }, 626 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 627 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 628 .len = IFNAMSIZ }, 629 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 630 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 631 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 632 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 633 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 634 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 635 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 636 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 637 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 638 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 639 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 640 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 641 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 642 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 643 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 644 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 646 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 648 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 649 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 650 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 651 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 652 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 653 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 654 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 655 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 656 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 657 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 658 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 659 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 660 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 661 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 662 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 663 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 664 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 665 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 666 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 667 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 668 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 669 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 670 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 671 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 672 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 673 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 674 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 675 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 676 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 677 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 678 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 679 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 680 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 681 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 682 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 683 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 684 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 685 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 686 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 687 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 688 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 689 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 690 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 691 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 692 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 694 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 695 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 696 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 697 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 698 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 699 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 700 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 701 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 702 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 703 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 704 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 705 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 706 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 707 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 708 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 709 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 710 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 711 [TCA_FLOWER_KEY_CT_STATE] = 712 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 713 [TCA_FLOWER_KEY_CT_STATE_MASK] = 714 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 715 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 716 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 717 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 718 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 719 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 720 .len = 128 / BITS_PER_BYTE }, 721 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 722 .len = 128 / BITS_PER_BYTE }, 723 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 724 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 725 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 726 [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, 727 [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, 728 [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, 729 [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, 730 [TCA_FLOWER_KEY_SPI] = { .type = NLA_U32 }, 731 [TCA_FLOWER_KEY_SPI_MASK] = { .type = NLA_U32 }, 732 [TCA_FLOWER_L2_MISS] = NLA_POLICY_MAX(NLA_U8, 1), 733 [TCA_FLOWER_KEY_CFM] = { .type = NLA_NESTED }, 734 }; 735 736 static const struct nla_policy 737 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 738 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 739 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 740 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 741 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 742 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 743 [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .type = NLA_NESTED }, 744 }; 745 746 static const struct nla_policy 747 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 748 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 749 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 750 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 751 .len = 128 }, 752 }; 753 754 static const struct nla_policy 755 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 756 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 757 }; 758 759 static const struct nla_policy 760 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 761 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 762 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 763 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 764 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 765 }; 766 767 static const struct nla_policy 768 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { 769 [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, 770 [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, 771 }; 772 773 static const struct nla_policy 774 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 775 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 776 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 777 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 778 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 779 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 780 }; 781 782 static const struct nla_policy 783 cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX + 1] = { 784 [TCA_FLOWER_KEY_CFM_MD_LEVEL] = NLA_POLICY_MAX(NLA_U8, 785 FLOW_DIS_CFM_MDL_MAX), 786 [TCA_FLOWER_KEY_CFM_OPCODE] = { .type = NLA_U8 }, 787 }; 788 789 static void fl_set_key_val(struct nlattr **tb, 790 void *val, int val_type, 791 void *mask, int mask_type, int len) 792 { 793 if (!tb[val_type]) 794 return; 795 nla_memcpy(val, tb[val_type], len); 796 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 797 memset(mask, 0xff, len); 798 else 799 nla_memcpy(mask, tb[mask_type], len); 800 } 801 802 static int fl_set_key_spi(struct nlattr **tb, struct fl_flow_key *key, 803 struct fl_flow_key *mask, 804 struct netlink_ext_ack *extack) 805 { 806 if (key->basic.ip_proto != IPPROTO_ESP && 807 key->basic.ip_proto != IPPROTO_AH) { 808 NL_SET_ERR_MSG(extack, 809 "Protocol must be either ESP or AH"); 810 return -EINVAL; 811 } 812 813 fl_set_key_val(tb, &key->ipsec.spi, 814 TCA_FLOWER_KEY_SPI, 815 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 816 sizeof(key->ipsec.spi)); 817 return 0; 818 } 819 820 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 821 struct fl_flow_key *mask, 822 struct netlink_ext_ack *extack) 823 { 824 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 825 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 826 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 827 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 828 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 829 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 830 fl_set_key_val(tb, &key->tp_range.tp_min.src, 831 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 832 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 833 fl_set_key_val(tb, &key->tp_range.tp_max.src, 834 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 835 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 836 837 if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) { 838 NL_SET_ERR_MSG(extack, 839 "Both min and max destination ports must be specified"); 840 return -EINVAL; 841 } 842 if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) { 843 NL_SET_ERR_MSG(extack, 844 "Both min and max source ports must be specified"); 845 return -EINVAL; 846 } 847 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 848 ntohs(key->tp_range.tp_max.dst) <= 849 ntohs(key->tp_range.tp_min.dst)) { 850 NL_SET_ERR_MSG_ATTR(extack, 851 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 852 "Invalid destination port range (min must be strictly smaller than max)"); 853 return -EINVAL; 854 } 855 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 856 ntohs(key->tp_range.tp_max.src) <= 857 ntohs(key->tp_range.tp_min.src)) { 858 NL_SET_ERR_MSG_ATTR(extack, 859 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 860 "Invalid source port range (min must be strictly smaller than max)"); 861 return -EINVAL; 862 } 863 864 return 0; 865 } 866 867 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 868 struct flow_dissector_key_mpls *key_val, 869 struct flow_dissector_key_mpls *key_mask, 870 struct netlink_ext_ack *extack) 871 { 872 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 873 struct flow_dissector_mpls_lse *lse_mask; 874 struct flow_dissector_mpls_lse *lse_val; 875 u8 lse_index; 876 u8 depth; 877 int err; 878 879 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 880 mpls_stack_entry_policy, extack); 881 if (err < 0) 882 return err; 883 884 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 885 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 886 return -EINVAL; 887 } 888 889 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 890 891 /* LSE depth starts at 1, for consistency with terminology used by 892 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 893 */ 894 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 895 NL_SET_ERR_MSG_ATTR(extack, 896 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 897 "Invalid MPLS depth"); 898 return -EINVAL; 899 } 900 lse_index = depth - 1; 901 902 dissector_set_mpls_lse(key_val, lse_index); 903 dissector_set_mpls_lse(key_mask, lse_index); 904 905 lse_val = &key_val->ls[lse_index]; 906 lse_mask = &key_mask->ls[lse_index]; 907 908 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 909 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 910 lse_mask->mpls_ttl = MPLS_TTL_MASK; 911 } 912 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 913 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 914 915 if (bos & ~MPLS_BOS_MASK) { 916 NL_SET_ERR_MSG_ATTR(extack, 917 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 918 "Bottom Of Stack (BOS) must be 0 or 1"); 919 return -EINVAL; 920 } 921 lse_val->mpls_bos = bos; 922 lse_mask->mpls_bos = MPLS_BOS_MASK; 923 } 924 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 925 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 926 927 if (tc & ~MPLS_TC_MASK) { 928 NL_SET_ERR_MSG_ATTR(extack, 929 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 930 "Traffic Class (TC) must be between 0 and 7"); 931 return -EINVAL; 932 } 933 lse_val->mpls_tc = tc; 934 lse_mask->mpls_tc = MPLS_TC_MASK; 935 } 936 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 937 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 938 939 if (label & ~MPLS_LABEL_MASK) { 940 NL_SET_ERR_MSG_ATTR(extack, 941 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 942 "Label must be between 0 and 1048575"); 943 return -EINVAL; 944 } 945 lse_val->mpls_label = label; 946 lse_mask->mpls_label = MPLS_LABEL_MASK; 947 } 948 949 return 0; 950 } 951 952 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 953 struct flow_dissector_key_mpls *key_val, 954 struct flow_dissector_key_mpls *key_mask, 955 struct netlink_ext_ack *extack) 956 { 957 struct nlattr *nla_lse; 958 int rem; 959 int err; 960 961 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 962 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 963 "NLA_F_NESTED is missing"); 964 return -EINVAL; 965 } 966 967 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 968 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 969 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 970 "Invalid MPLS option type"); 971 return -EINVAL; 972 } 973 974 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 975 if (err < 0) 976 return err; 977 } 978 if (rem) { 979 NL_SET_ERR_MSG(extack, 980 "Bytes leftover after parsing MPLS options"); 981 return -EINVAL; 982 } 983 984 return 0; 985 } 986 987 static int fl_set_key_mpls(struct nlattr **tb, 988 struct flow_dissector_key_mpls *key_val, 989 struct flow_dissector_key_mpls *key_mask, 990 struct netlink_ext_ack *extack) 991 { 992 struct flow_dissector_mpls_lse *lse_mask; 993 struct flow_dissector_mpls_lse *lse_val; 994 995 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 996 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 997 tb[TCA_FLOWER_KEY_MPLS_BOS] || 998 tb[TCA_FLOWER_KEY_MPLS_TC] || 999 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1000 NL_SET_ERR_MSG_ATTR(extack, 1001 tb[TCA_FLOWER_KEY_MPLS_OPTS], 1002 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 1003 return -EBADMSG; 1004 } 1005 1006 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 1007 key_val, key_mask, extack); 1008 } 1009 1010 lse_val = &key_val->ls[0]; 1011 lse_mask = &key_mask->ls[0]; 1012 1013 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 1014 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 1015 lse_mask->mpls_ttl = MPLS_TTL_MASK; 1016 dissector_set_mpls_lse(key_val, 0); 1017 dissector_set_mpls_lse(key_mask, 0); 1018 } 1019 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 1020 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 1021 1022 if (bos & ~MPLS_BOS_MASK) { 1023 NL_SET_ERR_MSG_ATTR(extack, 1024 tb[TCA_FLOWER_KEY_MPLS_BOS], 1025 "Bottom Of Stack (BOS) must be 0 or 1"); 1026 return -EINVAL; 1027 } 1028 lse_val->mpls_bos = bos; 1029 lse_mask->mpls_bos = MPLS_BOS_MASK; 1030 dissector_set_mpls_lse(key_val, 0); 1031 dissector_set_mpls_lse(key_mask, 0); 1032 } 1033 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 1034 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 1035 1036 if (tc & ~MPLS_TC_MASK) { 1037 NL_SET_ERR_MSG_ATTR(extack, 1038 tb[TCA_FLOWER_KEY_MPLS_TC], 1039 "Traffic Class (TC) must be between 0 and 7"); 1040 return -EINVAL; 1041 } 1042 lse_val->mpls_tc = tc; 1043 lse_mask->mpls_tc = MPLS_TC_MASK; 1044 dissector_set_mpls_lse(key_val, 0); 1045 dissector_set_mpls_lse(key_mask, 0); 1046 } 1047 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1048 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 1049 1050 if (label & ~MPLS_LABEL_MASK) { 1051 NL_SET_ERR_MSG_ATTR(extack, 1052 tb[TCA_FLOWER_KEY_MPLS_LABEL], 1053 "Label must be between 0 and 1048575"); 1054 return -EINVAL; 1055 } 1056 lse_val->mpls_label = label; 1057 lse_mask->mpls_label = MPLS_LABEL_MASK; 1058 dissector_set_mpls_lse(key_val, 0); 1059 dissector_set_mpls_lse(key_mask, 0); 1060 } 1061 return 0; 1062 } 1063 1064 static void fl_set_key_vlan(struct nlattr **tb, 1065 __be16 ethertype, 1066 int vlan_id_key, int vlan_prio_key, 1067 int vlan_next_eth_type_key, 1068 struct flow_dissector_key_vlan *key_val, 1069 struct flow_dissector_key_vlan *key_mask) 1070 { 1071 #define VLAN_PRIORITY_MASK 0x7 1072 1073 if (tb[vlan_id_key]) { 1074 key_val->vlan_id = 1075 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1076 key_mask->vlan_id = VLAN_VID_MASK; 1077 } 1078 if (tb[vlan_prio_key]) { 1079 key_val->vlan_priority = 1080 nla_get_u8(tb[vlan_prio_key]) & 1081 VLAN_PRIORITY_MASK; 1082 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1083 } 1084 if (ethertype) { 1085 key_val->vlan_tpid = ethertype; 1086 key_mask->vlan_tpid = cpu_to_be16(~0); 1087 } 1088 if (tb[vlan_next_eth_type_key]) { 1089 key_val->vlan_eth_type = 1090 nla_get_be16(tb[vlan_next_eth_type_key]); 1091 key_mask->vlan_eth_type = cpu_to_be16(~0); 1092 } 1093 } 1094 1095 static void fl_set_key_pppoe(struct nlattr **tb, 1096 struct flow_dissector_key_pppoe *key_val, 1097 struct flow_dissector_key_pppoe *key_mask, 1098 struct fl_flow_key *key, 1099 struct fl_flow_key *mask) 1100 { 1101 /* key_val::type must be set to ETH_P_PPP_SES 1102 * because ETH_P_PPP_SES was stored in basic.n_proto 1103 * which might get overwritten by ppp_proto 1104 * or might be set to 0, the role of key_val::type 1105 * is similar to vlan_key::tpid 1106 */ 1107 key_val->type = htons(ETH_P_PPP_SES); 1108 key_mask->type = cpu_to_be16(~0); 1109 1110 if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { 1111 key_val->session_id = 1112 nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); 1113 key_mask->session_id = cpu_to_be16(~0); 1114 } 1115 if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { 1116 key_val->ppp_proto = 1117 nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); 1118 key_mask->ppp_proto = cpu_to_be16(~0); 1119 1120 if (key_val->ppp_proto == htons(PPP_IP)) { 1121 key->basic.n_proto = htons(ETH_P_IP); 1122 mask->basic.n_proto = cpu_to_be16(~0); 1123 } else if (key_val->ppp_proto == htons(PPP_IPV6)) { 1124 key->basic.n_proto = htons(ETH_P_IPV6); 1125 mask->basic.n_proto = cpu_to_be16(~0); 1126 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { 1127 key->basic.n_proto = htons(ETH_P_MPLS_UC); 1128 mask->basic.n_proto = cpu_to_be16(~0); 1129 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { 1130 key->basic.n_proto = htons(ETH_P_MPLS_MC); 1131 mask->basic.n_proto = cpu_to_be16(~0); 1132 } 1133 } else { 1134 key->basic.n_proto = 0; 1135 mask->basic.n_proto = cpu_to_be16(0); 1136 } 1137 } 1138 1139 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1140 u32 *dissector_key, u32 *dissector_mask, 1141 u32 flower_flag_bit, u32 dissector_flag_bit) 1142 { 1143 if (flower_mask & flower_flag_bit) { 1144 *dissector_mask |= dissector_flag_bit; 1145 if (flower_key & flower_flag_bit) 1146 *dissector_key |= dissector_flag_bit; 1147 } 1148 } 1149 1150 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1151 u32 *flags_mask, struct netlink_ext_ack *extack) 1152 { 1153 u32 key, mask; 1154 1155 /* mask is mandatory for flags */ 1156 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1157 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1158 return -EINVAL; 1159 } 1160 1161 key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS])); 1162 mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1163 1164 *flags_key = 0; 1165 *flags_mask = 0; 1166 1167 fl_set_key_flag(key, mask, flags_key, flags_mask, 1168 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1169 fl_set_key_flag(key, mask, flags_key, flags_mask, 1170 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1171 FLOW_DIS_FIRST_FRAG); 1172 1173 return 0; 1174 } 1175 1176 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1177 struct flow_dissector_key_ip *key, 1178 struct flow_dissector_key_ip *mask) 1179 { 1180 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1181 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1182 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1183 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1184 1185 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1186 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1187 } 1188 1189 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1190 int depth, int option_len, 1191 struct netlink_ext_ack *extack) 1192 { 1193 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1194 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1195 struct geneve_opt *opt; 1196 int err, data_len = 0; 1197 1198 if (option_len > sizeof(struct geneve_opt)) 1199 data_len = option_len - sizeof(struct geneve_opt); 1200 1201 if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) 1202 return -ERANGE; 1203 1204 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1205 memset(opt, 0xff, option_len); 1206 opt->length = data_len / 4; 1207 opt->r1 = 0; 1208 opt->r2 = 0; 1209 opt->r3 = 0; 1210 1211 /* If no mask has been prodived we assume an exact match. */ 1212 if (!depth) 1213 return sizeof(struct geneve_opt) + data_len; 1214 1215 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1216 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1217 return -EINVAL; 1218 } 1219 1220 err = nla_parse_nested_deprecated(tb, 1221 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1222 nla, geneve_opt_policy, extack); 1223 if (err < 0) 1224 return err; 1225 1226 /* We are not allowed to omit any of CLASS, TYPE or DATA 1227 * fields from the key. 1228 */ 1229 if (!option_len && 1230 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1231 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1232 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1233 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1234 return -EINVAL; 1235 } 1236 1237 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1238 * for the mask. 1239 */ 1240 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1241 int new_len = key->enc_opts.len; 1242 1243 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1244 data_len = nla_len(data); 1245 if (data_len < 4) { 1246 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1247 return -ERANGE; 1248 } 1249 if (data_len % 4) { 1250 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1251 return -ERANGE; 1252 } 1253 1254 new_len += sizeof(struct geneve_opt) + data_len; 1255 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1256 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1257 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1258 return -ERANGE; 1259 } 1260 opt->length = data_len / 4; 1261 memcpy(opt->opt_data, nla_data(data), data_len); 1262 } 1263 1264 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1265 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1266 opt->opt_class = nla_get_be16(class); 1267 } 1268 1269 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1270 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1271 opt->type = nla_get_u8(type); 1272 } 1273 1274 return sizeof(struct geneve_opt) + data_len; 1275 } 1276 1277 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1278 int depth, int option_len, 1279 struct netlink_ext_ack *extack) 1280 { 1281 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1282 struct vxlan_metadata *md; 1283 int err; 1284 1285 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1286 memset(md, 0xff, sizeof(*md)); 1287 1288 if (!depth) 1289 return sizeof(*md); 1290 1291 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1292 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1293 return -EINVAL; 1294 } 1295 1296 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1297 vxlan_opt_policy, extack); 1298 if (err < 0) 1299 return err; 1300 1301 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1302 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1303 return -EINVAL; 1304 } 1305 1306 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1307 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1308 md->gbp &= VXLAN_GBP_MASK; 1309 } 1310 1311 return sizeof(*md); 1312 } 1313 1314 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1315 int depth, int option_len, 1316 struct netlink_ext_ack *extack) 1317 { 1318 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1319 struct erspan_metadata *md; 1320 int err; 1321 1322 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1323 memset(md, 0xff, sizeof(*md)); 1324 md->version = 1; 1325 1326 if (!depth) 1327 return sizeof(*md); 1328 1329 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1330 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1331 return -EINVAL; 1332 } 1333 1334 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1335 erspan_opt_policy, extack); 1336 if (err < 0) 1337 return err; 1338 1339 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1340 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1341 return -EINVAL; 1342 } 1343 1344 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1345 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1346 1347 if (md->version == 1) { 1348 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1349 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1350 return -EINVAL; 1351 } 1352 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1353 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1354 memset(&md->u, 0x00, sizeof(md->u)); 1355 md->u.index = nla_get_be32(nla); 1356 } 1357 } else if (md->version == 2) { 1358 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1359 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1360 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1361 return -EINVAL; 1362 } 1363 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1364 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1365 md->u.md2.dir = nla_get_u8(nla); 1366 } 1367 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1368 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1369 set_hwid(&md->u.md2, nla_get_u8(nla)); 1370 } 1371 } else { 1372 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1373 return -EINVAL; 1374 } 1375 1376 return sizeof(*md); 1377 } 1378 1379 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1380 int depth, int option_len, 1381 struct netlink_ext_ack *extack) 1382 { 1383 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1384 struct gtp_pdu_session_info *sinfo; 1385 u8 len = key->enc_opts.len; 1386 int err; 1387 1388 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1389 memset(sinfo, 0xff, option_len); 1390 1391 if (!depth) 1392 return sizeof(*sinfo); 1393 1394 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1395 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1396 return -EINVAL; 1397 } 1398 1399 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1400 gtp_opt_policy, extack); 1401 if (err < 0) 1402 return err; 1403 1404 if (!option_len && 1405 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1406 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1407 NL_SET_ERR_MSG_MOD(extack, 1408 "Missing tunnel key gtp option pdu type or qfi"); 1409 return -EINVAL; 1410 } 1411 1412 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1413 sinfo->pdu_type = 1414 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1415 1416 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1417 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1418 1419 return sizeof(*sinfo); 1420 } 1421 1422 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1423 struct fl_flow_key *mask, 1424 struct netlink_ext_ack *extack) 1425 { 1426 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1427 int err, option_len, key_depth, msk_depth = 0; 1428 1429 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1430 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1431 enc_opts_policy, extack); 1432 if (err) 1433 return err; 1434 1435 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1436 1437 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1438 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1439 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1440 enc_opts_policy, extack); 1441 if (err) 1442 return err; 1443 1444 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1445 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1446 if (!nla_ok(nla_opt_msk, msk_depth)) { 1447 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1448 return -EINVAL; 1449 } 1450 } 1451 1452 nla_for_each_attr(nla_opt_key, nla_enc_key, 1453 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1454 switch (nla_type(nla_opt_key)) { 1455 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1456 if (key->enc_opts.dst_opt_type && 1457 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1458 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1459 return -EINVAL; 1460 } 1461 option_len = 0; 1462 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1463 option_len = fl_set_geneve_opt(nla_opt_key, key, 1464 key_depth, option_len, 1465 extack); 1466 if (option_len < 0) 1467 return option_len; 1468 1469 key->enc_opts.len += option_len; 1470 /* At the same time we need to parse through the mask 1471 * in order to verify exact and mask attribute lengths. 1472 */ 1473 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1474 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1475 msk_depth, option_len, 1476 extack); 1477 if (option_len < 0) 1478 return option_len; 1479 1480 mask->enc_opts.len += option_len; 1481 if (key->enc_opts.len != mask->enc_opts.len) { 1482 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1483 return -EINVAL; 1484 } 1485 break; 1486 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1487 if (key->enc_opts.dst_opt_type) { 1488 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1489 return -EINVAL; 1490 } 1491 option_len = 0; 1492 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1493 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1494 key_depth, option_len, 1495 extack); 1496 if (option_len < 0) 1497 return option_len; 1498 1499 key->enc_opts.len += option_len; 1500 /* At the same time we need to parse through the mask 1501 * in order to verify exact and mask attribute lengths. 1502 */ 1503 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1504 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1505 msk_depth, option_len, 1506 extack); 1507 if (option_len < 0) 1508 return option_len; 1509 1510 mask->enc_opts.len += option_len; 1511 if (key->enc_opts.len != mask->enc_opts.len) { 1512 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1513 return -EINVAL; 1514 } 1515 break; 1516 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1517 if (key->enc_opts.dst_opt_type) { 1518 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1519 return -EINVAL; 1520 } 1521 option_len = 0; 1522 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1523 option_len = fl_set_erspan_opt(nla_opt_key, key, 1524 key_depth, option_len, 1525 extack); 1526 if (option_len < 0) 1527 return option_len; 1528 1529 key->enc_opts.len += option_len; 1530 /* At the same time we need to parse through the mask 1531 * in order to verify exact and mask attribute lengths. 1532 */ 1533 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1534 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1535 msk_depth, option_len, 1536 extack); 1537 if (option_len < 0) 1538 return option_len; 1539 1540 mask->enc_opts.len += option_len; 1541 if (key->enc_opts.len != mask->enc_opts.len) { 1542 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1543 return -EINVAL; 1544 } 1545 break; 1546 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1547 if (key->enc_opts.dst_opt_type) { 1548 NL_SET_ERR_MSG_MOD(extack, 1549 "Duplicate type for gtp options"); 1550 return -EINVAL; 1551 } 1552 option_len = 0; 1553 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1554 option_len = fl_set_gtp_opt(nla_opt_key, key, 1555 key_depth, option_len, 1556 extack); 1557 if (option_len < 0) 1558 return option_len; 1559 1560 key->enc_opts.len += option_len; 1561 /* At the same time we need to parse through the mask 1562 * in order to verify exact and mask attribute lengths. 1563 */ 1564 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1565 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1566 msk_depth, option_len, 1567 extack); 1568 if (option_len < 0) 1569 return option_len; 1570 1571 mask->enc_opts.len += option_len; 1572 if (key->enc_opts.len != mask->enc_opts.len) { 1573 NL_SET_ERR_MSG_MOD(extack, 1574 "Key and mask miss aligned"); 1575 return -EINVAL; 1576 } 1577 break; 1578 default: 1579 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1580 return -EINVAL; 1581 } 1582 1583 if (!msk_depth) 1584 continue; 1585 1586 if (!nla_ok(nla_opt_msk, msk_depth)) { 1587 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1588 return -EINVAL; 1589 } 1590 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1591 } 1592 1593 return 0; 1594 } 1595 1596 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1597 struct netlink_ext_ack *extack) 1598 { 1599 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1600 NL_SET_ERR_MSG_ATTR(extack, tb, 1601 "no trk, so no other flag can be set"); 1602 return -EINVAL; 1603 } 1604 1605 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1606 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1607 NL_SET_ERR_MSG_ATTR(extack, tb, 1608 "new and est are mutually exclusive"); 1609 return -EINVAL; 1610 } 1611 1612 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1613 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1614 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1615 NL_SET_ERR_MSG_ATTR(extack, tb, 1616 "when inv is set, only trk may be set"); 1617 return -EINVAL; 1618 } 1619 1620 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1621 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1622 NL_SET_ERR_MSG_ATTR(extack, tb, 1623 "new and rpl are mutually exclusive"); 1624 return -EINVAL; 1625 } 1626 1627 return 0; 1628 } 1629 1630 static int fl_set_key_ct(struct nlattr **tb, 1631 struct flow_dissector_key_ct *key, 1632 struct flow_dissector_key_ct *mask, 1633 struct netlink_ext_ack *extack) 1634 { 1635 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1636 int err; 1637 1638 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1639 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1640 return -EOPNOTSUPP; 1641 } 1642 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1643 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1644 sizeof(key->ct_state)); 1645 1646 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1647 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1648 extack); 1649 if (err) 1650 return err; 1651 1652 } 1653 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1654 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1655 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1656 return -EOPNOTSUPP; 1657 } 1658 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1659 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1660 sizeof(key->ct_zone)); 1661 } 1662 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1663 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1664 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1665 return -EOPNOTSUPP; 1666 } 1667 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1668 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1669 sizeof(key->ct_mark)); 1670 } 1671 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1672 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1673 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1674 return -EOPNOTSUPP; 1675 } 1676 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1677 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1678 sizeof(key->ct_labels)); 1679 } 1680 1681 return 0; 1682 } 1683 1684 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1685 struct fl_flow_key *key, struct fl_flow_key *mask, 1686 int vthresh) 1687 { 1688 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1689 1690 if (!tb) { 1691 *ethertype = 0; 1692 return good_num_of_vlans; 1693 } 1694 1695 *ethertype = nla_get_be16(tb); 1696 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1697 return true; 1698 1699 key->basic.n_proto = *ethertype; 1700 mask->basic.n_proto = cpu_to_be16(~0); 1701 return false; 1702 } 1703 1704 static void fl_set_key_cfm_md_level(struct nlattr **tb, 1705 struct fl_flow_key *key, 1706 struct fl_flow_key *mask, 1707 struct netlink_ext_ack *extack) 1708 { 1709 u8 level; 1710 1711 if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) 1712 return; 1713 1714 level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); 1715 key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); 1716 mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; 1717 } 1718 1719 static void fl_set_key_cfm_opcode(struct nlattr **tb, 1720 struct fl_flow_key *key, 1721 struct fl_flow_key *mask, 1722 struct netlink_ext_ack *extack) 1723 { 1724 fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, 1725 &mask->cfm.opcode, TCA_FLOWER_UNSPEC, 1726 sizeof(key->cfm.opcode)); 1727 } 1728 1729 static int fl_set_key_cfm(struct nlattr **tb, 1730 struct fl_flow_key *key, 1731 struct fl_flow_key *mask, 1732 struct netlink_ext_ack *extack) 1733 { 1734 struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1]; 1735 int err; 1736 1737 if (!tb[TCA_FLOWER_KEY_CFM]) 1738 return 0; 1739 1740 err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, 1741 tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); 1742 if (err < 0) 1743 return err; 1744 1745 fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); 1746 fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 1747 1748 return 0; 1749 } 1750 1751 static int fl_set_key(struct net *net, struct nlattr **tb, 1752 struct fl_flow_key *key, struct fl_flow_key *mask, 1753 struct netlink_ext_ack *extack) 1754 { 1755 __be16 ethertype; 1756 int ret = 0; 1757 1758 if (tb[TCA_FLOWER_INDEV]) { 1759 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1760 if (err < 0) 1761 return err; 1762 key->meta.ingress_ifindex = err; 1763 mask->meta.ingress_ifindex = 0xffffffff; 1764 } 1765 1766 fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, 1767 &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, 1768 sizeof(key->meta.l2_miss)); 1769 1770 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1771 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1772 sizeof(key->eth.dst)); 1773 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1774 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1775 sizeof(key->eth.src)); 1776 fl_set_key_val(tb, &key->num_of_vlans, 1777 TCA_FLOWER_KEY_NUM_OF_VLANS, 1778 &mask->num_of_vlans, 1779 TCA_FLOWER_UNSPEC, 1780 sizeof(key->num_of_vlans)); 1781 1782 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1783 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1784 TCA_FLOWER_KEY_VLAN_PRIO, 1785 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1786 &key->vlan, &mask->vlan); 1787 1788 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1789 ðertype, key, mask, 1)) { 1790 fl_set_key_vlan(tb, ethertype, 1791 TCA_FLOWER_KEY_CVLAN_ID, 1792 TCA_FLOWER_KEY_CVLAN_PRIO, 1793 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1794 &key->cvlan, &mask->cvlan); 1795 fl_set_key_val(tb, &key->basic.n_proto, 1796 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1797 &mask->basic.n_proto, 1798 TCA_FLOWER_UNSPEC, 1799 sizeof(key->basic.n_proto)); 1800 } 1801 } 1802 1803 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1804 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1805 1806 if (key->basic.n_proto == htons(ETH_P_IP) || 1807 key->basic.n_proto == htons(ETH_P_IPV6)) { 1808 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1809 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1810 sizeof(key->basic.ip_proto)); 1811 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1812 } 1813 1814 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1815 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1816 mask->control.addr_type = ~0; 1817 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1818 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1819 sizeof(key->ipv4.src)); 1820 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1821 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1822 sizeof(key->ipv4.dst)); 1823 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1824 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1825 mask->control.addr_type = ~0; 1826 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1827 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1828 sizeof(key->ipv6.src)); 1829 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1830 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1831 sizeof(key->ipv6.dst)); 1832 } 1833 1834 if (key->basic.ip_proto == IPPROTO_TCP) { 1835 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1836 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1837 sizeof(key->tp.src)); 1838 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1839 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1840 sizeof(key->tp.dst)); 1841 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1842 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1843 sizeof(key->tcp.flags)); 1844 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1845 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1846 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1847 sizeof(key->tp.src)); 1848 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1849 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1850 sizeof(key->tp.dst)); 1851 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1852 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1853 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1854 sizeof(key->tp.src)); 1855 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1856 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1857 sizeof(key->tp.dst)); 1858 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1859 key->basic.ip_proto == IPPROTO_ICMP) { 1860 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1861 &mask->icmp.type, 1862 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1863 sizeof(key->icmp.type)); 1864 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1865 &mask->icmp.code, 1866 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1867 sizeof(key->icmp.code)); 1868 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1869 key->basic.ip_proto == IPPROTO_ICMPV6) { 1870 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1871 &mask->icmp.type, 1872 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1873 sizeof(key->icmp.type)); 1874 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1875 &mask->icmp.code, 1876 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1877 sizeof(key->icmp.code)); 1878 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1879 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1880 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1881 if (ret) 1882 return ret; 1883 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1884 key->basic.n_proto == htons(ETH_P_RARP)) { 1885 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1886 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1887 sizeof(key->arp.sip)); 1888 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1889 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1890 sizeof(key->arp.tip)); 1891 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1892 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1893 sizeof(key->arp.op)); 1894 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1895 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1896 sizeof(key->arp.sha)); 1897 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1898 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1899 sizeof(key->arp.tha)); 1900 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 1901 fl_set_key_val(tb, &key->l2tpv3.session_id, 1902 TCA_FLOWER_KEY_L2TPV3_SID, 1903 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 1904 sizeof(key->l2tpv3.session_id)); 1905 } else if (key->basic.n_proto == htons(ETH_P_CFM)) { 1906 ret = fl_set_key_cfm(tb, key, mask, extack); 1907 if (ret) 1908 return ret; 1909 } 1910 1911 if (key->basic.ip_proto == IPPROTO_TCP || 1912 key->basic.ip_proto == IPPROTO_UDP || 1913 key->basic.ip_proto == IPPROTO_SCTP) { 1914 ret = fl_set_key_port_range(tb, key, mask, extack); 1915 if (ret) 1916 return ret; 1917 } 1918 1919 if (tb[TCA_FLOWER_KEY_SPI]) { 1920 ret = fl_set_key_spi(tb, key, mask, extack); 1921 if (ret) 1922 return ret; 1923 } 1924 1925 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1926 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1927 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1928 mask->enc_control.addr_type = ~0; 1929 fl_set_key_val(tb, &key->enc_ipv4.src, 1930 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1931 &mask->enc_ipv4.src, 1932 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1933 sizeof(key->enc_ipv4.src)); 1934 fl_set_key_val(tb, &key->enc_ipv4.dst, 1935 TCA_FLOWER_KEY_ENC_IPV4_DST, 1936 &mask->enc_ipv4.dst, 1937 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1938 sizeof(key->enc_ipv4.dst)); 1939 } 1940 1941 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1942 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1943 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1944 mask->enc_control.addr_type = ~0; 1945 fl_set_key_val(tb, &key->enc_ipv6.src, 1946 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1947 &mask->enc_ipv6.src, 1948 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1949 sizeof(key->enc_ipv6.src)); 1950 fl_set_key_val(tb, &key->enc_ipv6.dst, 1951 TCA_FLOWER_KEY_ENC_IPV6_DST, 1952 &mask->enc_ipv6.dst, 1953 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1954 sizeof(key->enc_ipv6.dst)); 1955 } 1956 1957 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1958 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1959 sizeof(key->enc_key_id.keyid)); 1960 1961 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1962 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1963 sizeof(key->enc_tp.src)); 1964 1965 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1966 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1967 sizeof(key->enc_tp.dst)); 1968 1969 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1970 1971 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1972 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1973 sizeof(key->hash.hash)); 1974 1975 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1976 ret = fl_set_enc_opt(tb, key, mask, extack); 1977 if (ret) 1978 return ret; 1979 } 1980 1981 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1982 if (ret) 1983 return ret; 1984 1985 if (tb[TCA_FLOWER_KEY_FLAGS]) 1986 ret = fl_set_key_flags(tb, &key->control.flags, 1987 &mask->control.flags, extack); 1988 1989 return ret; 1990 } 1991 1992 static void fl_mask_copy(struct fl_flow_mask *dst, 1993 struct fl_flow_mask *src) 1994 { 1995 const void *psrc = fl_key_get_start(&src->key, src); 1996 void *pdst = fl_key_get_start(&dst->key, src); 1997 1998 memcpy(pdst, psrc, fl_mask_range(src)); 1999 dst->range = src->range; 2000 } 2001 2002 static const struct rhashtable_params fl_ht_params = { 2003 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 2004 .head_offset = offsetof(struct cls_fl_filter, ht_node), 2005 .automatic_shrinking = true, 2006 }; 2007 2008 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 2009 { 2010 mask->filter_ht_params = fl_ht_params; 2011 mask->filter_ht_params.key_len = fl_mask_range(mask); 2012 mask->filter_ht_params.key_offset += mask->range.start; 2013 2014 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 2015 } 2016 2017 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 2018 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 2019 2020 #define FL_KEY_IS_MASKED(mask, member) \ 2021 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 2022 0, FL_KEY_MEMBER_SIZE(member)) \ 2023 2024 #define FL_KEY_SET(keys, cnt, id, member) \ 2025 do { \ 2026 keys[cnt].key_id = id; \ 2027 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 2028 cnt++; \ 2029 } while(0); 2030 2031 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 2032 do { \ 2033 if (FL_KEY_IS_MASKED(mask, member)) \ 2034 FL_KEY_SET(keys, cnt, id, member); \ 2035 } while(0); 2036 2037 static void fl_init_dissector(struct flow_dissector *dissector, 2038 struct fl_flow_key *mask) 2039 { 2040 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 2041 size_t cnt = 0; 2042 2043 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2044 FLOW_DISSECTOR_KEY_META, meta); 2045 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 2046 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 2047 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2048 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 2049 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2050 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 2051 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2052 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 2053 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2054 FLOW_DISSECTOR_KEY_PORTS, tp); 2055 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2056 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 2057 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2058 FLOW_DISSECTOR_KEY_IP, ip); 2059 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2060 FLOW_DISSECTOR_KEY_TCP, tcp); 2061 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2062 FLOW_DISSECTOR_KEY_ICMP, icmp); 2063 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2064 FLOW_DISSECTOR_KEY_ARP, arp); 2065 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2066 FLOW_DISSECTOR_KEY_MPLS, mpls); 2067 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2068 FLOW_DISSECTOR_KEY_VLAN, vlan); 2069 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2070 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 2071 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2072 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 2073 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2074 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 2075 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2076 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 2077 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 2078 FL_KEY_IS_MASKED(mask, enc_ipv6)) 2079 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 2080 enc_control); 2081 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2082 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 2083 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2084 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 2085 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2086 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 2087 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2088 FLOW_DISSECTOR_KEY_CT, ct); 2089 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2090 FLOW_DISSECTOR_KEY_HASH, hash); 2091 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2092 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 2093 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2094 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 2095 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2096 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 2097 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2098 FLOW_DISSECTOR_KEY_IPSEC, ipsec); 2099 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2100 FLOW_DISSECTOR_KEY_CFM, cfm); 2101 2102 skb_flow_dissector_init(dissector, keys, cnt); 2103 } 2104 2105 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 2106 struct fl_flow_mask *mask) 2107 { 2108 struct fl_flow_mask *newmask; 2109 int err; 2110 2111 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 2112 if (!newmask) 2113 return ERR_PTR(-ENOMEM); 2114 2115 fl_mask_copy(newmask, mask); 2116 2117 if ((newmask->key.tp_range.tp_min.dst && 2118 newmask->key.tp_range.tp_max.dst) || 2119 (newmask->key.tp_range.tp_min.src && 2120 newmask->key.tp_range.tp_max.src)) 2121 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2122 2123 err = fl_init_mask_hashtable(newmask); 2124 if (err) 2125 goto errout_free; 2126 2127 fl_init_dissector(&newmask->dissector, &newmask->key); 2128 2129 INIT_LIST_HEAD_RCU(&newmask->filters); 2130 2131 refcount_set(&newmask->refcnt, 1); 2132 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2133 &newmask->ht_node, mask_ht_params); 2134 if (err) 2135 goto errout_destroy; 2136 2137 spin_lock(&head->masks_lock); 2138 list_add_tail_rcu(&newmask->list, &head->masks); 2139 spin_unlock(&head->masks_lock); 2140 2141 return newmask; 2142 2143 errout_destroy: 2144 rhashtable_destroy(&newmask->ht); 2145 errout_free: 2146 kfree(newmask); 2147 2148 return ERR_PTR(err); 2149 } 2150 2151 static int fl_check_assign_mask(struct cls_fl_head *head, 2152 struct cls_fl_filter *fnew, 2153 struct cls_fl_filter *fold, 2154 struct fl_flow_mask *mask) 2155 { 2156 struct fl_flow_mask *newmask; 2157 int ret = 0; 2158 2159 rcu_read_lock(); 2160 2161 /* Insert mask as temporary node to prevent concurrent creation of mask 2162 * with same key. Any concurrent lookups with same key will return 2163 * -EAGAIN because mask's refcnt is zero. 2164 */ 2165 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2166 &mask->ht_node, 2167 mask_ht_params); 2168 if (!fnew->mask) { 2169 rcu_read_unlock(); 2170 2171 if (fold) { 2172 ret = -EINVAL; 2173 goto errout_cleanup; 2174 } 2175 2176 newmask = fl_create_new_mask(head, mask); 2177 if (IS_ERR(newmask)) { 2178 ret = PTR_ERR(newmask); 2179 goto errout_cleanup; 2180 } 2181 2182 fnew->mask = newmask; 2183 return 0; 2184 } else if (IS_ERR(fnew->mask)) { 2185 ret = PTR_ERR(fnew->mask); 2186 } else if (fold && fold->mask != fnew->mask) { 2187 ret = -EINVAL; 2188 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2189 /* Mask was deleted concurrently, try again */ 2190 ret = -EAGAIN; 2191 } 2192 rcu_read_unlock(); 2193 return ret; 2194 2195 errout_cleanup: 2196 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2197 mask_ht_params); 2198 return ret; 2199 } 2200 2201 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) 2202 { 2203 return mask->meta.l2_miss; 2204 } 2205 2206 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2207 struct cls_fl_filter *fold, 2208 bool *in_ht) 2209 { 2210 struct fl_flow_mask *mask = fnew->mask; 2211 int err; 2212 2213 err = rhashtable_lookup_insert_fast(&mask->ht, 2214 &fnew->ht_node, 2215 mask->filter_ht_params); 2216 if (err) { 2217 *in_ht = false; 2218 /* It is okay if filter with same key exists when 2219 * overwriting. 2220 */ 2221 return fold && err == -EEXIST ? 0 : err; 2222 } 2223 2224 *in_ht = true; 2225 return 0; 2226 } 2227 2228 static int fl_change(struct net *net, struct sk_buff *in_skb, 2229 struct tcf_proto *tp, unsigned long base, 2230 u32 handle, struct nlattr **tca, 2231 void **arg, u32 flags, 2232 struct netlink_ext_ack *extack) 2233 { 2234 struct cls_fl_head *head = fl_head_dereference(tp); 2235 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2236 struct cls_fl_filter *fold = *arg; 2237 bool bound_to_filter = false; 2238 struct cls_fl_filter *fnew; 2239 struct fl_flow_mask *mask; 2240 struct nlattr **tb; 2241 bool in_ht; 2242 int err; 2243 2244 if (!tca[TCA_OPTIONS]) { 2245 err = -EINVAL; 2246 goto errout_fold; 2247 } 2248 2249 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2250 if (!mask) { 2251 err = -ENOBUFS; 2252 goto errout_fold; 2253 } 2254 2255 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2256 if (!tb) { 2257 err = -ENOBUFS; 2258 goto errout_mask_alloc; 2259 } 2260 2261 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2262 tca[TCA_OPTIONS], fl_policy, NULL); 2263 if (err < 0) 2264 goto errout_tb; 2265 2266 if (fold && handle && fold->handle != handle) { 2267 err = -EINVAL; 2268 goto errout_tb; 2269 } 2270 2271 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2272 if (!fnew) { 2273 err = -ENOBUFS; 2274 goto errout_tb; 2275 } 2276 INIT_LIST_HEAD(&fnew->hw_list); 2277 refcount_set(&fnew->refcnt, 1); 2278 2279 if (tb[TCA_FLOWER_FLAGS]) { 2280 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2281 2282 if (!tc_flags_valid(fnew->flags)) { 2283 kfree(fnew); 2284 err = -EINVAL; 2285 goto errout_tb; 2286 } 2287 } 2288 2289 if (!fold) { 2290 spin_lock(&tp->lock); 2291 if (!handle) { 2292 handle = 1; 2293 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2294 INT_MAX, GFP_ATOMIC); 2295 } else { 2296 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2297 handle, GFP_ATOMIC); 2298 2299 /* Filter with specified handle was concurrently 2300 * inserted after initial check in cls_api. This is not 2301 * necessarily an error if NLM_F_EXCL is not set in 2302 * message flags. Returning EAGAIN will cause cls_api to 2303 * try to update concurrently inserted rule. 2304 */ 2305 if (err == -ENOSPC) 2306 err = -EAGAIN; 2307 } 2308 spin_unlock(&tp->lock); 2309 2310 if (err) { 2311 kfree(fnew); 2312 goto errout_tb; 2313 } 2314 } 2315 fnew->handle = handle; 2316 2317 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2318 !tc_skip_hw(fnew->flags)); 2319 if (err < 0) 2320 goto errout_idr; 2321 2322 err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], 2323 &fnew->exts, flags, fnew->flags, 2324 extack); 2325 if (err < 0) 2326 goto errout_idr; 2327 2328 if (tb[TCA_FLOWER_CLASSID]) { 2329 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2330 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2331 rtnl_lock(); 2332 tcf_bind_filter(tp, &fnew->res, base); 2333 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2334 rtnl_unlock(); 2335 bound_to_filter = true; 2336 } 2337 2338 err = fl_set_key(net, tb, &fnew->key, &mask->key, extack); 2339 if (err) 2340 goto unbind_filter; 2341 2342 fl_mask_update_range(mask); 2343 fl_set_masked_key(&fnew->mkey, &fnew->key, mask); 2344 2345 if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { 2346 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2347 err = -EINVAL; 2348 goto unbind_filter; 2349 } 2350 2351 /* Enable tc skb extension if filter matches on data extracted from 2352 * this extension. 2353 */ 2354 if (fl_needs_tc_skb_ext(&mask->key)) { 2355 fnew->needs_tc_skb_ext = 1; 2356 tc_skb_ext_tc_enable(); 2357 } 2358 2359 err = fl_check_assign_mask(head, fnew, fold, mask); 2360 if (err) 2361 goto unbind_filter; 2362 2363 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2364 if (err) 2365 goto errout_mask; 2366 2367 if (!tc_skip_hw(fnew->flags)) { 2368 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2369 if (err) 2370 goto errout_ht; 2371 } 2372 2373 if (!tc_in_hw(fnew->flags)) 2374 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2375 2376 spin_lock(&tp->lock); 2377 2378 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2379 * proto again or create new one, if necessary. 2380 */ 2381 if (tp->deleting) { 2382 err = -EAGAIN; 2383 goto errout_hw; 2384 } 2385 2386 if (fold) { 2387 /* Fold filter was deleted concurrently. Retry lookup. */ 2388 if (fold->deleted) { 2389 err = -EAGAIN; 2390 goto errout_hw; 2391 } 2392 2393 fnew->handle = handle; 2394 2395 if (!in_ht) { 2396 struct rhashtable_params params = 2397 fnew->mask->filter_ht_params; 2398 2399 err = rhashtable_insert_fast(&fnew->mask->ht, 2400 &fnew->ht_node, 2401 params); 2402 if (err) 2403 goto errout_hw; 2404 in_ht = true; 2405 } 2406 2407 refcount_inc(&fnew->refcnt); 2408 rhashtable_remove_fast(&fold->mask->ht, 2409 &fold->ht_node, 2410 fold->mask->filter_ht_params); 2411 idr_replace(&head->handle_idr, fnew, fnew->handle); 2412 list_replace_rcu(&fold->list, &fnew->list); 2413 fold->deleted = true; 2414 2415 spin_unlock(&tp->lock); 2416 2417 fl_mask_put(head, fold->mask); 2418 if (!tc_skip_hw(fold->flags)) 2419 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2420 tcf_unbind_filter(tp, &fold->res); 2421 /* Caller holds reference to fold, so refcnt is always > 0 2422 * after this. 2423 */ 2424 refcount_dec(&fold->refcnt); 2425 __fl_put(fold); 2426 } else { 2427 idr_replace(&head->handle_idr, fnew, fnew->handle); 2428 2429 refcount_inc(&fnew->refcnt); 2430 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2431 spin_unlock(&tp->lock); 2432 } 2433 2434 *arg = fnew; 2435 2436 kfree(tb); 2437 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2438 return 0; 2439 2440 errout_ht: 2441 spin_lock(&tp->lock); 2442 errout_hw: 2443 fnew->deleted = true; 2444 spin_unlock(&tp->lock); 2445 if (!tc_skip_hw(fnew->flags)) 2446 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2447 if (in_ht) 2448 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2449 fnew->mask->filter_ht_params); 2450 errout_mask: 2451 fl_mask_put(head, fnew->mask); 2452 2453 unbind_filter: 2454 if (bound_to_filter) { 2455 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2456 rtnl_lock(); 2457 tcf_unbind_filter(tp, &fnew->res); 2458 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2459 rtnl_unlock(); 2460 } 2461 2462 errout_idr: 2463 if (!fold) { 2464 spin_lock(&tp->lock); 2465 idr_remove(&head->handle_idr, fnew->handle); 2466 spin_unlock(&tp->lock); 2467 } 2468 __fl_put(fnew); 2469 errout_tb: 2470 kfree(tb); 2471 errout_mask_alloc: 2472 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2473 errout_fold: 2474 if (fold) 2475 __fl_put(fold); 2476 return err; 2477 } 2478 2479 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2480 bool rtnl_held, struct netlink_ext_ack *extack) 2481 { 2482 struct cls_fl_head *head = fl_head_dereference(tp); 2483 struct cls_fl_filter *f = arg; 2484 bool last_on_mask; 2485 int err = 0; 2486 2487 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2488 *last = list_empty(&head->masks); 2489 __fl_put(f); 2490 2491 return err; 2492 } 2493 2494 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2495 bool rtnl_held) 2496 { 2497 struct cls_fl_head *head = fl_head_dereference(tp); 2498 unsigned long id = arg->cookie, tmp; 2499 struct cls_fl_filter *f; 2500 2501 arg->count = arg->skip; 2502 2503 rcu_read_lock(); 2504 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2505 /* don't return filters that are being deleted */ 2506 if (!f || !refcount_inc_not_zero(&f->refcnt)) 2507 continue; 2508 rcu_read_unlock(); 2509 2510 if (arg->fn(tp, f, arg) < 0) { 2511 __fl_put(f); 2512 arg->stop = 1; 2513 rcu_read_lock(); 2514 break; 2515 } 2516 __fl_put(f); 2517 arg->count++; 2518 rcu_read_lock(); 2519 } 2520 rcu_read_unlock(); 2521 arg->cookie = id; 2522 } 2523 2524 static struct cls_fl_filter * 2525 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2526 { 2527 struct cls_fl_head *head = fl_head_dereference(tp); 2528 2529 spin_lock(&tp->lock); 2530 if (list_empty(&head->hw_filters)) { 2531 spin_unlock(&tp->lock); 2532 return NULL; 2533 } 2534 2535 if (!f) 2536 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2537 hw_list); 2538 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2539 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2540 spin_unlock(&tp->lock); 2541 return f; 2542 } 2543 } 2544 2545 spin_unlock(&tp->lock); 2546 return NULL; 2547 } 2548 2549 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2550 void *cb_priv, struct netlink_ext_ack *extack) 2551 { 2552 struct tcf_block *block = tp->chain->block; 2553 struct flow_cls_offload cls_flower = {}; 2554 struct cls_fl_filter *f = NULL; 2555 int err; 2556 2557 /* hw_filters list can only be changed by hw offload functions after 2558 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2559 * iterating it. 2560 */ 2561 ASSERT_RTNL(); 2562 2563 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2564 cls_flower.rule = 2565 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2566 if (!cls_flower.rule) { 2567 __fl_put(f); 2568 return -ENOMEM; 2569 } 2570 2571 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2572 extack); 2573 cls_flower.command = add ? 2574 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2575 cls_flower.cookie = (unsigned long)f; 2576 cls_flower.rule->match.dissector = &f->mask->dissector; 2577 cls_flower.rule->match.mask = &f->mask->key; 2578 cls_flower.rule->match.key = &f->mkey; 2579 2580 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2581 cls_flower.common.extack); 2582 if (err) { 2583 kfree(cls_flower.rule); 2584 if (tc_skip_sw(f->flags)) { 2585 __fl_put(f); 2586 return err; 2587 } 2588 goto next_flow; 2589 } 2590 2591 cls_flower.classid = f->res.classid; 2592 2593 err = tc_setup_cb_reoffload(block, tp, add, cb, 2594 TC_SETUP_CLSFLOWER, &cls_flower, 2595 cb_priv, &f->flags, 2596 &f->in_hw_count); 2597 tc_cleanup_offload_action(&cls_flower.rule->action); 2598 kfree(cls_flower.rule); 2599 2600 if (err) { 2601 __fl_put(f); 2602 return err; 2603 } 2604 next_flow: 2605 __fl_put(f); 2606 } 2607 2608 return 0; 2609 } 2610 2611 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2612 { 2613 struct flow_cls_offload *cls_flower = type_data; 2614 struct cls_fl_filter *f = 2615 (struct cls_fl_filter *) cls_flower->cookie; 2616 struct cls_fl_head *head = fl_head_dereference(tp); 2617 2618 spin_lock(&tp->lock); 2619 list_add(&f->hw_list, &head->hw_filters); 2620 spin_unlock(&tp->lock); 2621 } 2622 2623 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2624 { 2625 struct flow_cls_offload *cls_flower = type_data; 2626 struct cls_fl_filter *f = 2627 (struct cls_fl_filter *) cls_flower->cookie; 2628 2629 spin_lock(&tp->lock); 2630 if (!list_empty(&f->hw_list)) 2631 list_del_init(&f->hw_list); 2632 spin_unlock(&tp->lock); 2633 } 2634 2635 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2636 struct fl_flow_tmplt *tmplt) 2637 { 2638 struct flow_cls_offload cls_flower = {}; 2639 struct tcf_block *block = chain->block; 2640 2641 cls_flower.rule = flow_rule_alloc(0); 2642 if (!cls_flower.rule) 2643 return -ENOMEM; 2644 2645 cls_flower.common.chain_index = chain->index; 2646 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2647 cls_flower.cookie = (unsigned long) tmplt; 2648 cls_flower.rule->match.dissector = &tmplt->dissector; 2649 cls_flower.rule->match.mask = &tmplt->mask; 2650 cls_flower.rule->match.key = &tmplt->dummy_key; 2651 2652 /* We don't care if driver (any of them) fails to handle this 2653 * call. It serves just as a hint for it. 2654 */ 2655 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2656 kfree(cls_flower.rule); 2657 2658 return 0; 2659 } 2660 2661 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2662 struct fl_flow_tmplt *tmplt) 2663 { 2664 struct flow_cls_offload cls_flower = {}; 2665 struct tcf_block *block = chain->block; 2666 2667 cls_flower.common.chain_index = chain->index; 2668 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2669 cls_flower.cookie = (unsigned long) tmplt; 2670 2671 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2672 } 2673 2674 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2675 struct nlattr **tca, 2676 struct netlink_ext_ack *extack) 2677 { 2678 struct fl_flow_tmplt *tmplt; 2679 struct nlattr **tb; 2680 int err; 2681 2682 if (!tca[TCA_OPTIONS]) 2683 return ERR_PTR(-EINVAL); 2684 2685 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2686 if (!tb) 2687 return ERR_PTR(-ENOBUFS); 2688 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2689 tca[TCA_OPTIONS], fl_policy, NULL); 2690 if (err) 2691 goto errout_tb; 2692 2693 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2694 if (!tmplt) { 2695 err = -ENOMEM; 2696 goto errout_tb; 2697 } 2698 tmplt->chain = chain; 2699 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2700 if (err) 2701 goto errout_tmplt; 2702 2703 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2704 2705 err = fl_hw_create_tmplt(chain, tmplt); 2706 if (err) 2707 goto errout_tmplt; 2708 2709 kfree(tb); 2710 return tmplt; 2711 2712 errout_tmplt: 2713 kfree(tmplt); 2714 errout_tb: 2715 kfree(tb); 2716 return ERR_PTR(err); 2717 } 2718 2719 static void fl_tmplt_destroy(void *tmplt_priv) 2720 { 2721 struct fl_flow_tmplt *tmplt = tmplt_priv; 2722 2723 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2724 kfree(tmplt); 2725 } 2726 2727 static void fl_tmplt_reoffload(struct tcf_chain *chain, bool add, 2728 flow_setup_cb_t *cb, void *cb_priv) 2729 { 2730 struct fl_flow_tmplt *tmplt = chain->tmplt_priv; 2731 struct flow_cls_offload cls_flower = {}; 2732 2733 cls_flower.rule = flow_rule_alloc(0); 2734 if (!cls_flower.rule) 2735 return; 2736 2737 cls_flower.common.chain_index = chain->index; 2738 cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE : 2739 FLOW_CLS_TMPLT_DESTROY; 2740 cls_flower.cookie = (unsigned long) tmplt; 2741 cls_flower.rule->match.dissector = &tmplt->dissector; 2742 cls_flower.rule->match.mask = &tmplt->mask; 2743 cls_flower.rule->match.key = &tmplt->dummy_key; 2744 2745 cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 2746 kfree(cls_flower.rule); 2747 } 2748 2749 static int fl_dump_key_val(struct sk_buff *skb, 2750 void *val, int val_type, 2751 void *mask, int mask_type, int len) 2752 { 2753 int err; 2754 2755 if (!memchr_inv(mask, 0, len)) 2756 return 0; 2757 err = nla_put(skb, val_type, len, val); 2758 if (err) 2759 return err; 2760 if (mask_type != TCA_FLOWER_UNSPEC) { 2761 err = nla_put(skb, mask_type, len, mask); 2762 if (err) 2763 return err; 2764 } 2765 return 0; 2766 } 2767 2768 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2769 struct fl_flow_key *mask) 2770 { 2771 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2772 TCA_FLOWER_KEY_PORT_DST_MIN, 2773 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2774 sizeof(key->tp_range.tp_min.dst)) || 2775 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2776 TCA_FLOWER_KEY_PORT_DST_MAX, 2777 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2778 sizeof(key->tp_range.tp_max.dst)) || 2779 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2780 TCA_FLOWER_KEY_PORT_SRC_MIN, 2781 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2782 sizeof(key->tp_range.tp_min.src)) || 2783 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2784 TCA_FLOWER_KEY_PORT_SRC_MAX, 2785 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2786 sizeof(key->tp_range.tp_max.src))) 2787 return -1; 2788 2789 return 0; 2790 } 2791 2792 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2793 struct flow_dissector_key_mpls *mpls_key, 2794 struct flow_dissector_key_mpls *mpls_mask, 2795 u8 lse_index) 2796 { 2797 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2798 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2799 int err; 2800 2801 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2802 lse_index + 1); 2803 if (err) 2804 return err; 2805 2806 if (lse_mask->mpls_ttl) { 2807 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2808 lse_key->mpls_ttl); 2809 if (err) 2810 return err; 2811 } 2812 if (lse_mask->mpls_bos) { 2813 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2814 lse_key->mpls_bos); 2815 if (err) 2816 return err; 2817 } 2818 if (lse_mask->mpls_tc) { 2819 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2820 lse_key->mpls_tc); 2821 if (err) 2822 return err; 2823 } 2824 if (lse_mask->mpls_label) { 2825 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2826 lse_key->mpls_label); 2827 if (err) 2828 return err; 2829 } 2830 2831 return 0; 2832 } 2833 2834 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2835 struct flow_dissector_key_mpls *mpls_key, 2836 struct flow_dissector_key_mpls *mpls_mask) 2837 { 2838 struct nlattr *opts; 2839 struct nlattr *lse; 2840 u8 lse_index; 2841 int err; 2842 2843 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2844 if (!opts) 2845 return -EMSGSIZE; 2846 2847 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2848 if (!(mpls_mask->used_lses & 1 << lse_index)) 2849 continue; 2850 2851 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2852 if (!lse) { 2853 err = -EMSGSIZE; 2854 goto err_opts; 2855 } 2856 2857 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2858 lse_index); 2859 if (err) 2860 goto err_opts_lse; 2861 nla_nest_end(skb, lse); 2862 } 2863 nla_nest_end(skb, opts); 2864 2865 return 0; 2866 2867 err_opts_lse: 2868 nla_nest_cancel(skb, lse); 2869 err_opts: 2870 nla_nest_cancel(skb, opts); 2871 2872 return err; 2873 } 2874 2875 static int fl_dump_key_mpls(struct sk_buff *skb, 2876 struct flow_dissector_key_mpls *mpls_key, 2877 struct flow_dissector_key_mpls *mpls_mask) 2878 { 2879 struct flow_dissector_mpls_lse *lse_mask; 2880 struct flow_dissector_mpls_lse *lse_key; 2881 int err; 2882 2883 if (!mpls_mask->used_lses) 2884 return 0; 2885 2886 lse_mask = &mpls_mask->ls[0]; 2887 lse_key = &mpls_key->ls[0]; 2888 2889 /* For backward compatibility, don't use the MPLS nested attributes if 2890 * the rule can be expressed using the old attributes. 2891 */ 2892 if (mpls_mask->used_lses & ~1 || 2893 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2894 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2895 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2896 2897 if (lse_mask->mpls_ttl) { 2898 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2899 lse_key->mpls_ttl); 2900 if (err) 2901 return err; 2902 } 2903 if (lse_mask->mpls_tc) { 2904 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2905 lse_key->mpls_tc); 2906 if (err) 2907 return err; 2908 } 2909 if (lse_mask->mpls_label) { 2910 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2911 lse_key->mpls_label); 2912 if (err) 2913 return err; 2914 } 2915 if (lse_mask->mpls_bos) { 2916 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2917 lse_key->mpls_bos); 2918 if (err) 2919 return err; 2920 } 2921 return 0; 2922 } 2923 2924 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2925 struct flow_dissector_key_ip *key, 2926 struct flow_dissector_key_ip *mask) 2927 { 2928 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2929 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2930 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2931 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2932 2933 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2934 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2935 return -1; 2936 2937 return 0; 2938 } 2939 2940 static int fl_dump_key_vlan(struct sk_buff *skb, 2941 int vlan_id_key, int vlan_prio_key, 2942 struct flow_dissector_key_vlan *vlan_key, 2943 struct flow_dissector_key_vlan *vlan_mask) 2944 { 2945 int err; 2946 2947 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2948 return 0; 2949 if (vlan_mask->vlan_id) { 2950 err = nla_put_u16(skb, vlan_id_key, 2951 vlan_key->vlan_id); 2952 if (err) 2953 return err; 2954 } 2955 if (vlan_mask->vlan_priority) { 2956 err = nla_put_u8(skb, vlan_prio_key, 2957 vlan_key->vlan_priority); 2958 if (err) 2959 return err; 2960 } 2961 return 0; 2962 } 2963 2964 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2965 u32 *flower_key, u32 *flower_mask, 2966 u32 flower_flag_bit, u32 dissector_flag_bit) 2967 { 2968 if (dissector_mask & dissector_flag_bit) { 2969 *flower_mask |= flower_flag_bit; 2970 if (dissector_key & dissector_flag_bit) 2971 *flower_key |= flower_flag_bit; 2972 } 2973 } 2974 2975 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2976 { 2977 u32 key, mask; 2978 __be32 _key, _mask; 2979 int err; 2980 2981 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2982 return 0; 2983 2984 key = 0; 2985 mask = 0; 2986 2987 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2988 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2989 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2990 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2991 FLOW_DIS_FIRST_FRAG); 2992 2993 _key = cpu_to_be32(key); 2994 _mask = cpu_to_be32(mask); 2995 2996 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2997 if (err) 2998 return err; 2999 3000 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 3001 } 3002 3003 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 3004 struct flow_dissector_key_enc_opts *enc_opts) 3005 { 3006 struct geneve_opt *opt; 3007 struct nlattr *nest; 3008 int opt_off = 0; 3009 3010 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 3011 if (!nest) 3012 goto nla_put_failure; 3013 3014 while (enc_opts->len > opt_off) { 3015 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 3016 3017 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 3018 opt->opt_class)) 3019 goto nla_put_failure; 3020 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 3021 opt->type)) 3022 goto nla_put_failure; 3023 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 3024 opt->length * 4, opt->opt_data)) 3025 goto nla_put_failure; 3026 3027 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 3028 } 3029 nla_nest_end(skb, nest); 3030 return 0; 3031 3032 nla_put_failure: 3033 nla_nest_cancel(skb, nest); 3034 return -EMSGSIZE; 3035 } 3036 3037 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 3038 struct flow_dissector_key_enc_opts *enc_opts) 3039 { 3040 struct vxlan_metadata *md; 3041 struct nlattr *nest; 3042 3043 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 3044 if (!nest) 3045 goto nla_put_failure; 3046 3047 md = (struct vxlan_metadata *)&enc_opts->data[0]; 3048 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 3049 goto nla_put_failure; 3050 3051 nla_nest_end(skb, nest); 3052 return 0; 3053 3054 nla_put_failure: 3055 nla_nest_cancel(skb, nest); 3056 return -EMSGSIZE; 3057 } 3058 3059 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 3060 struct flow_dissector_key_enc_opts *enc_opts) 3061 { 3062 struct erspan_metadata *md; 3063 struct nlattr *nest; 3064 3065 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 3066 if (!nest) 3067 goto nla_put_failure; 3068 3069 md = (struct erspan_metadata *)&enc_opts->data[0]; 3070 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 3071 goto nla_put_failure; 3072 3073 if (md->version == 1 && 3074 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 3075 goto nla_put_failure; 3076 3077 if (md->version == 2 && 3078 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 3079 md->u.md2.dir) || 3080 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 3081 get_hwid(&md->u.md2)))) 3082 goto nla_put_failure; 3083 3084 nla_nest_end(skb, nest); 3085 return 0; 3086 3087 nla_put_failure: 3088 nla_nest_cancel(skb, nest); 3089 return -EMSGSIZE; 3090 } 3091 3092 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 3093 struct flow_dissector_key_enc_opts *enc_opts) 3094 3095 { 3096 struct gtp_pdu_session_info *session_info; 3097 struct nlattr *nest; 3098 3099 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 3100 if (!nest) 3101 goto nla_put_failure; 3102 3103 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 3104 3105 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 3106 session_info->pdu_type)) 3107 goto nla_put_failure; 3108 3109 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 3110 goto nla_put_failure; 3111 3112 nla_nest_end(skb, nest); 3113 return 0; 3114 3115 nla_put_failure: 3116 nla_nest_cancel(skb, nest); 3117 return -EMSGSIZE; 3118 } 3119 3120 static int fl_dump_key_ct(struct sk_buff *skb, 3121 struct flow_dissector_key_ct *key, 3122 struct flow_dissector_key_ct *mask) 3123 { 3124 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 3125 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 3126 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 3127 sizeof(key->ct_state))) 3128 goto nla_put_failure; 3129 3130 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 3131 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 3132 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 3133 sizeof(key->ct_zone))) 3134 goto nla_put_failure; 3135 3136 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3137 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 3138 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 3139 sizeof(key->ct_mark))) 3140 goto nla_put_failure; 3141 3142 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3143 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 3144 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 3145 sizeof(key->ct_labels))) 3146 goto nla_put_failure; 3147 3148 return 0; 3149 3150 nla_put_failure: 3151 return -EMSGSIZE; 3152 } 3153 3154 static int fl_dump_key_cfm(struct sk_buff *skb, 3155 struct flow_dissector_key_cfm *key, 3156 struct flow_dissector_key_cfm *mask) 3157 { 3158 struct nlattr *opts; 3159 int err; 3160 u8 mdl; 3161 3162 if (!memchr_inv(mask, 0, sizeof(*mask))) 3163 return 0; 3164 3165 opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); 3166 if (!opts) 3167 return -EMSGSIZE; 3168 3169 if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { 3170 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); 3171 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); 3172 if (err) 3173 goto err_cfm_opts; 3174 } 3175 3176 if (mask->opcode) { 3177 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); 3178 if (err) 3179 goto err_cfm_opts; 3180 } 3181 3182 nla_nest_end(skb, opts); 3183 3184 return 0; 3185 3186 err_cfm_opts: 3187 nla_nest_cancel(skb, opts); 3188 return err; 3189 } 3190 3191 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3192 struct flow_dissector_key_enc_opts *enc_opts) 3193 { 3194 struct nlattr *nest; 3195 int err; 3196 3197 if (!enc_opts->len) 3198 return 0; 3199 3200 nest = nla_nest_start_noflag(skb, enc_opt_type); 3201 if (!nest) 3202 goto nla_put_failure; 3203 3204 switch (enc_opts->dst_opt_type) { 3205 case TUNNEL_GENEVE_OPT: 3206 err = fl_dump_key_geneve_opt(skb, enc_opts); 3207 if (err) 3208 goto nla_put_failure; 3209 break; 3210 case TUNNEL_VXLAN_OPT: 3211 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3212 if (err) 3213 goto nla_put_failure; 3214 break; 3215 case TUNNEL_ERSPAN_OPT: 3216 err = fl_dump_key_erspan_opt(skb, enc_opts); 3217 if (err) 3218 goto nla_put_failure; 3219 break; 3220 case TUNNEL_GTP_OPT: 3221 err = fl_dump_key_gtp_opt(skb, enc_opts); 3222 if (err) 3223 goto nla_put_failure; 3224 break; 3225 default: 3226 goto nla_put_failure; 3227 } 3228 nla_nest_end(skb, nest); 3229 return 0; 3230 3231 nla_put_failure: 3232 nla_nest_cancel(skb, nest); 3233 return -EMSGSIZE; 3234 } 3235 3236 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3237 struct flow_dissector_key_enc_opts *key_opts, 3238 struct flow_dissector_key_enc_opts *msk_opts) 3239 { 3240 int err; 3241 3242 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3243 if (err) 3244 return err; 3245 3246 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3247 } 3248 3249 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3250 struct fl_flow_key *key, struct fl_flow_key *mask) 3251 { 3252 if (mask->meta.ingress_ifindex) { 3253 struct net_device *dev; 3254 3255 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3256 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3257 goto nla_put_failure; 3258 } 3259 3260 if (fl_dump_key_val(skb, &key->meta.l2_miss, 3261 TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, 3262 TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 3263 goto nla_put_failure; 3264 3265 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3266 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3267 sizeof(key->eth.dst)) || 3268 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3269 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3270 sizeof(key->eth.src)) || 3271 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3272 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3273 sizeof(key->basic.n_proto))) 3274 goto nla_put_failure; 3275 3276 if (mask->num_of_vlans.num_of_vlans) { 3277 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3278 goto nla_put_failure; 3279 } 3280 3281 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3282 goto nla_put_failure; 3283 3284 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3285 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3286 goto nla_put_failure; 3287 3288 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3289 TCA_FLOWER_KEY_CVLAN_PRIO, 3290 &key->cvlan, &mask->cvlan) || 3291 (mask->cvlan.vlan_tpid && 3292 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3293 key->cvlan.vlan_tpid))) 3294 goto nla_put_failure; 3295 3296 if (mask->basic.n_proto) { 3297 if (mask->cvlan.vlan_eth_type) { 3298 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3299 key->basic.n_proto)) 3300 goto nla_put_failure; 3301 } else if (mask->vlan.vlan_eth_type) { 3302 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3303 key->vlan.vlan_eth_type)) 3304 goto nla_put_failure; 3305 } 3306 } 3307 3308 if ((key->basic.n_proto == htons(ETH_P_IP) || 3309 key->basic.n_proto == htons(ETH_P_IPV6)) && 3310 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3311 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3312 sizeof(key->basic.ip_proto)) || 3313 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3314 goto nla_put_failure; 3315 3316 if (mask->pppoe.session_id) { 3317 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3318 key->pppoe.session_id)) 3319 goto nla_put_failure; 3320 } 3321 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3322 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3323 key->pppoe.ppp_proto)) 3324 goto nla_put_failure; 3325 } 3326 3327 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3328 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3329 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3330 sizeof(key->ipv4.src)) || 3331 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3332 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3333 sizeof(key->ipv4.dst)))) 3334 goto nla_put_failure; 3335 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3336 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3337 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3338 sizeof(key->ipv6.src)) || 3339 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3340 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3341 sizeof(key->ipv6.dst)))) 3342 goto nla_put_failure; 3343 3344 if (key->basic.ip_proto == IPPROTO_TCP && 3345 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3346 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3347 sizeof(key->tp.src)) || 3348 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3349 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3350 sizeof(key->tp.dst)) || 3351 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3352 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3353 sizeof(key->tcp.flags)))) 3354 goto nla_put_failure; 3355 else if (key->basic.ip_proto == IPPROTO_UDP && 3356 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3357 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3358 sizeof(key->tp.src)) || 3359 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3360 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3361 sizeof(key->tp.dst)))) 3362 goto nla_put_failure; 3363 else if (key->basic.ip_proto == IPPROTO_SCTP && 3364 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3365 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3366 sizeof(key->tp.src)) || 3367 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3368 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3369 sizeof(key->tp.dst)))) 3370 goto nla_put_failure; 3371 else if (key->basic.n_proto == htons(ETH_P_IP) && 3372 key->basic.ip_proto == IPPROTO_ICMP && 3373 (fl_dump_key_val(skb, &key->icmp.type, 3374 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3375 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3376 sizeof(key->icmp.type)) || 3377 fl_dump_key_val(skb, &key->icmp.code, 3378 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3379 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3380 sizeof(key->icmp.code)))) 3381 goto nla_put_failure; 3382 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3383 key->basic.ip_proto == IPPROTO_ICMPV6 && 3384 (fl_dump_key_val(skb, &key->icmp.type, 3385 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3386 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3387 sizeof(key->icmp.type)) || 3388 fl_dump_key_val(skb, &key->icmp.code, 3389 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3390 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3391 sizeof(key->icmp.code)))) 3392 goto nla_put_failure; 3393 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3394 key->basic.n_proto == htons(ETH_P_RARP)) && 3395 (fl_dump_key_val(skb, &key->arp.sip, 3396 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3397 TCA_FLOWER_KEY_ARP_SIP_MASK, 3398 sizeof(key->arp.sip)) || 3399 fl_dump_key_val(skb, &key->arp.tip, 3400 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3401 TCA_FLOWER_KEY_ARP_TIP_MASK, 3402 sizeof(key->arp.tip)) || 3403 fl_dump_key_val(skb, &key->arp.op, 3404 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3405 TCA_FLOWER_KEY_ARP_OP_MASK, 3406 sizeof(key->arp.op)) || 3407 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3408 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3409 sizeof(key->arp.sha)) || 3410 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3411 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3412 sizeof(key->arp.tha)))) 3413 goto nla_put_failure; 3414 else if (key->basic.ip_proto == IPPROTO_L2TP && 3415 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3416 TCA_FLOWER_KEY_L2TPV3_SID, 3417 &mask->l2tpv3.session_id, 3418 TCA_FLOWER_UNSPEC, 3419 sizeof(key->l2tpv3.session_id))) 3420 goto nla_put_failure; 3421 3422 if (key->ipsec.spi && 3423 fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, 3424 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 3425 sizeof(key->ipsec.spi))) 3426 goto nla_put_failure; 3427 3428 if ((key->basic.ip_proto == IPPROTO_TCP || 3429 key->basic.ip_proto == IPPROTO_UDP || 3430 key->basic.ip_proto == IPPROTO_SCTP) && 3431 fl_dump_key_port_range(skb, key, mask)) 3432 goto nla_put_failure; 3433 3434 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3435 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3436 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3437 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3438 sizeof(key->enc_ipv4.src)) || 3439 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3440 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3441 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3442 sizeof(key->enc_ipv4.dst)))) 3443 goto nla_put_failure; 3444 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3445 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3446 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3447 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3448 sizeof(key->enc_ipv6.src)) || 3449 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3450 TCA_FLOWER_KEY_ENC_IPV6_DST, 3451 &mask->enc_ipv6.dst, 3452 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3453 sizeof(key->enc_ipv6.dst)))) 3454 goto nla_put_failure; 3455 3456 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3457 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3458 sizeof(key->enc_key_id)) || 3459 fl_dump_key_val(skb, &key->enc_tp.src, 3460 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3461 &mask->enc_tp.src, 3462 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3463 sizeof(key->enc_tp.src)) || 3464 fl_dump_key_val(skb, &key->enc_tp.dst, 3465 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3466 &mask->enc_tp.dst, 3467 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3468 sizeof(key->enc_tp.dst)) || 3469 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3470 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3471 goto nla_put_failure; 3472 3473 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3474 goto nla_put_failure; 3475 3476 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3477 goto nla_put_failure; 3478 3479 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3480 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3481 sizeof(key->hash.hash))) 3482 goto nla_put_failure; 3483 3484 if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 3485 goto nla_put_failure; 3486 3487 return 0; 3488 3489 nla_put_failure: 3490 return -EMSGSIZE; 3491 } 3492 3493 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3494 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3495 { 3496 struct cls_fl_filter *f = fh; 3497 struct nlattr *nest; 3498 struct fl_flow_key *key, *mask; 3499 bool skip_hw; 3500 3501 if (!f) 3502 return skb->len; 3503 3504 t->tcm_handle = f->handle; 3505 3506 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3507 if (!nest) 3508 goto nla_put_failure; 3509 3510 spin_lock(&tp->lock); 3511 3512 if (f->res.classid && 3513 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3514 goto nla_put_failure_locked; 3515 3516 key = &f->key; 3517 mask = &f->mask->key; 3518 skip_hw = tc_skip_hw(f->flags); 3519 3520 if (fl_dump_key(skb, net, key, mask)) 3521 goto nla_put_failure_locked; 3522 3523 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3524 goto nla_put_failure_locked; 3525 3526 spin_unlock(&tp->lock); 3527 3528 if (!skip_hw) 3529 fl_hw_update_stats(tp, f, rtnl_held); 3530 3531 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3532 goto nla_put_failure; 3533 3534 if (tcf_exts_dump(skb, &f->exts)) 3535 goto nla_put_failure; 3536 3537 nla_nest_end(skb, nest); 3538 3539 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3540 goto nla_put_failure; 3541 3542 return skb->len; 3543 3544 nla_put_failure_locked: 3545 spin_unlock(&tp->lock); 3546 nla_put_failure: 3547 nla_nest_cancel(skb, nest); 3548 return -1; 3549 } 3550 3551 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3552 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3553 { 3554 struct cls_fl_filter *f = fh; 3555 struct nlattr *nest; 3556 bool skip_hw; 3557 3558 if (!f) 3559 return skb->len; 3560 3561 t->tcm_handle = f->handle; 3562 3563 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3564 if (!nest) 3565 goto nla_put_failure; 3566 3567 spin_lock(&tp->lock); 3568 3569 skip_hw = tc_skip_hw(f->flags); 3570 3571 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3572 goto nla_put_failure_locked; 3573 3574 spin_unlock(&tp->lock); 3575 3576 if (!skip_hw) 3577 fl_hw_update_stats(tp, f, rtnl_held); 3578 3579 if (tcf_exts_terse_dump(skb, &f->exts)) 3580 goto nla_put_failure; 3581 3582 nla_nest_end(skb, nest); 3583 3584 return skb->len; 3585 3586 nla_put_failure_locked: 3587 spin_unlock(&tp->lock); 3588 nla_put_failure: 3589 nla_nest_cancel(skb, nest); 3590 return -1; 3591 } 3592 3593 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3594 { 3595 struct fl_flow_tmplt *tmplt = tmplt_priv; 3596 struct fl_flow_key *key, *mask; 3597 struct nlattr *nest; 3598 3599 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3600 if (!nest) 3601 goto nla_put_failure; 3602 3603 key = &tmplt->dummy_key; 3604 mask = &tmplt->mask; 3605 3606 if (fl_dump_key(skb, net, key, mask)) 3607 goto nla_put_failure; 3608 3609 nla_nest_end(skb, nest); 3610 3611 return skb->len; 3612 3613 nla_put_failure: 3614 nla_nest_cancel(skb, nest); 3615 return -EMSGSIZE; 3616 } 3617 3618 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3619 unsigned long base) 3620 { 3621 struct cls_fl_filter *f = fh; 3622 3623 tc_cls_bind_class(classid, cl, q, &f->res, base); 3624 } 3625 3626 static bool fl_delete_empty(struct tcf_proto *tp) 3627 { 3628 struct cls_fl_head *head = fl_head_dereference(tp); 3629 3630 spin_lock(&tp->lock); 3631 tp->deleting = idr_is_empty(&head->handle_idr); 3632 spin_unlock(&tp->lock); 3633 3634 return tp->deleting; 3635 } 3636 3637 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3638 .kind = "flower", 3639 .classify = fl_classify, 3640 .init = fl_init, 3641 .destroy = fl_destroy, 3642 .get = fl_get, 3643 .put = fl_put, 3644 .change = fl_change, 3645 .delete = fl_delete, 3646 .delete_empty = fl_delete_empty, 3647 .walk = fl_walk, 3648 .reoffload = fl_reoffload, 3649 .hw_add = fl_hw_add, 3650 .hw_del = fl_hw_del, 3651 .dump = fl_dump, 3652 .terse_dump = fl_terse_dump, 3653 .bind_class = fl_bind_class, 3654 .tmplt_create = fl_tmplt_create, 3655 .tmplt_destroy = fl_tmplt_destroy, 3656 .tmplt_reoffload = fl_tmplt_reoffload, 3657 .tmplt_dump = fl_tmplt_dump, 3658 .get_exts = fl_get_exts, 3659 .owner = THIS_MODULE, 3660 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3661 }; 3662 3663 static int __init cls_fl_init(void) 3664 { 3665 return register_tcf_proto_ops(&cls_fl_ops); 3666 } 3667 3668 static void __exit cls_fl_exit(void) 3669 { 3670 unregister_tcf_proto_ops(&cls_fl_ops); 3671 } 3672 3673 module_init(cls_fl_init); 3674 module_exit(cls_fl_exit); 3675 3676 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3677 MODULE_DESCRIPTION("Flower classifier"); 3678 MODULE_LICENSE("GPL v2"); 3679