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 md->version = 1; 1324 1325 if (!depth) 1326 return sizeof(*md); 1327 1328 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1329 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1330 return -EINVAL; 1331 } 1332 1333 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1334 erspan_opt_policy, extack); 1335 if (err < 0) 1336 return err; 1337 1338 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1339 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1340 return -EINVAL; 1341 } 1342 1343 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1344 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1345 1346 if (md->version == 1) { 1347 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1348 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1349 return -EINVAL; 1350 } 1351 memset(&md->u.index, 0xff, sizeof(md->u.index)); 1352 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1353 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1354 md->u.index = nla_get_be32(nla); 1355 } 1356 } else if (md->version == 2) { 1357 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1358 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1359 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1360 return -EINVAL; 1361 } 1362 md->u.md2.dir = 1; 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 set_hwid(&md->u.md2, 0xff); 1368 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1369 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1370 set_hwid(&md->u.md2, nla_get_u8(nla)); 1371 } 1372 } else { 1373 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1374 return -EINVAL; 1375 } 1376 1377 return sizeof(*md); 1378 } 1379 1380 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1381 int depth, int option_len, 1382 struct netlink_ext_ack *extack) 1383 { 1384 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1385 struct gtp_pdu_session_info *sinfo; 1386 u8 len = key->enc_opts.len; 1387 int err; 1388 1389 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1390 memset(sinfo, 0xff, option_len); 1391 1392 if (!depth) 1393 return sizeof(*sinfo); 1394 1395 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1396 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1397 return -EINVAL; 1398 } 1399 1400 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1401 gtp_opt_policy, extack); 1402 if (err < 0) 1403 return err; 1404 1405 if (!option_len && 1406 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1407 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1408 NL_SET_ERR_MSG_MOD(extack, 1409 "Missing tunnel key gtp option pdu type or qfi"); 1410 return -EINVAL; 1411 } 1412 1413 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1414 sinfo->pdu_type = 1415 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1416 1417 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1418 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1419 1420 return sizeof(*sinfo); 1421 } 1422 1423 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1424 struct fl_flow_key *mask, 1425 struct netlink_ext_ack *extack) 1426 { 1427 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1428 int err, option_len, key_depth, msk_depth = 0; 1429 1430 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1431 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1432 enc_opts_policy, extack); 1433 if (err) 1434 return err; 1435 1436 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1437 1438 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1439 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1440 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1441 enc_opts_policy, extack); 1442 if (err) 1443 return err; 1444 1445 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1446 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1447 if (!nla_ok(nla_opt_msk, msk_depth)) { 1448 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1449 return -EINVAL; 1450 } 1451 } 1452 1453 nla_for_each_attr(nla_opt_key, nla_enc_key, 1454 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1455 switch (nla_type(nla_opt_key)) { 1456 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1457 if (key->enc_opts.dst_opt_type && 1458 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1459 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1460 return -EINVAL; 1461 } 1462 option_len = 0; 1463 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1464 option_len = fl_set_geneve_opt(nla_opt_key, key, 1465 key_depth, option_len, 1466 extack); 1467 if (option_len < 0) 1468 return option_len; 1469 1470 key->enc_opts.len += option_len; 1471 /* At the same time we need to parse through the mask 1472 * in order to verify exact and mask attribute lengths. 1473 */ 1474 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1475 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1476 msk_depth, option_len, 1477 extack); 1478 if (option_len < 0) 1479 return option_len; 1480 1481 mask->enc_opts.len += option_len; 1482 if (key->enc_opts.len != mask->enc_opts.len) { 1483 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1484 return -EINVAL; 1485 } 1486 break; 1487 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1488 if (key->enc_opts.dst_opt_type) { 1489 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1490 return -EINVAL; 1491 } 1492 option_len = 0; 1493 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1494 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1495 key_depth, option_len, 1496 extack); 1497 if (option_len < 0) 1498 return option_len; 1499 1500 key->enc_opts.len += option_len; 1501 /* At the same time we need to parse through the mask 1502 * in order to verify exact and mask attribute lengths. 1503 */ 1504 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1505 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1506 msk_depth, option_len, 1507 extack); 1508 if (option_len < 0) 1509 return option_len; 1510 1511 mask->enc_opts.len += option_len; 1512 if (key->enc_opts.len != mask->enc_opts.len) { 1513 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1514 return -EINVAL; 1515 } 1516 break; 1517 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1518 if (key->enc_opts.dst_opt_type) { 1519 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1520 return -EINVAL; 1521 } 1522 option_len = 0; 1523 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1524 option_len = fl_set_erspan_opt(nla_opt_key, key, 1525 key_depth, option_len, 1526 extack); 1527 if (option_len < 0) 1528 return option_len; 1529 1530 key->enc_opts.len += option_len; 1531 /* At the same time we need to parse through the mask 1532 * in order to verify exact and mask attribute lengths. 1533 */ 1534 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1535 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1536 msk_depth, option_len, 1537 extack); 1538 if (option_len < 0) 1539 return option_len; 1540 1541 mask->enc_opts.len += option_len; 1542 if (key->enc_opts.len != mask->enc_opts.len) { 1543 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1544 return -EINVAL; 1545 } 1546 break; 1547 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1548 if (key->enc_opts.dst_opt_type) { 1549 NL_SET_ERR_MSG_MOD(extack, 1550 "Duplicate type for gtp options"); 1551 return -EINVAL; 1552 } 1553 option_len = 0; 1554 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1555 option_len = fl_set_gtp_opt(nla_opt_key, key, 1556 key_depth, option_len, 1557 extack); 1558 if (option_len < 0) 1559 return option_len; 1560 1561 key->enc_opts.len += option_len; 1562 /* At the same time we need to parse through the mask 1563 * in order to verify exact and mask attribute lengths. 1564 */ 1565 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1566 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1567 msk_depth, option_len, 1568 extack); 1569 if (option_len < 0) 1570 return option_len; 1571 1572 mask->enc_opts.len += option_len; 1573 if (key->enc_opts.len != mask->enc_opts.len) { 1574 NL_SET_ERR_MSG_MOD(extack, 1575 "Key and mask miss aligned"); 1576 return -EINVAL; 1577 } 1578 break; 1579 default: 1580 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1581 return -EINVAL; 1582 } 1583 1584 if (!msk_depth) 1585 continue; 1586 1587 if (!nla_ok(nla_opt_msk, msk_depth)) { 1588 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1589 return -EINVAL; 1590 } 1591 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1592 } 1593 1594 return 0; 1595 } 1596 1597 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1598 struct netlink_ext_ack *extack) 1599 { 1600 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1601 NL_SET_ERR_MSG_ATTR(extack, tb, 1602 "no trk, so no other flag can be set"); 1603 return -EINVAL; 1604 } 1605 1606 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1607 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1608 NL_SET_ERR_MSG_ATTR(extack, tb, 1609 "new and est are mutually exclusive"); 1610 return -EINVAL; 1611 } 1612 1613 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1614 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1615 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1616 NL_SET_ERR_MSG_ATTR(extack, tb, 1617 "when inv is set, only trk may be set"); 1618 return -EINVAL; 1619 } 1620 1621 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1622 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1623 NL_SET_ERR_MSG_ATTR(extack, tb, 1624 "new and rpl are mutually exclusive"); 1625 return -EINVAL; 1626 } 1627 1628 return 0; 1629 } 1630 1631 static int fl_set_key_ct(struct nlattr **tb, 1632 struct flow_dissector_key_ct *key, 1633 struct flow_dissector_key_ct *mask, 1634 struct netlink_ext_ack *extack) 1635 { 1636 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1637 int err; 1638 1639 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1640 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1641 return -EOPNOTSUPP; 1642 } 1643 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1644 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1645 sizeof(key->ct_state)); 1646 1647 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1648 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1649 extack); 1650 if (err) 1651 return err; 1652 1653 } 1654 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1655 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1656 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1657 return -EOPNOTSUPP; 1658 } 1659 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1660 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1661 sizeof(key->ct_zone)); 1662 } 1663 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1664 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1665 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1666 return -EOPNOTSUPP; 1667 } 1668 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1669 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1670 sizeof(key->ct_mark)); 1671 } 1672 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1673 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1674 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1675 return -EOPNOTSUPP; 1676 } 1677 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1678 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1679 sizeof(key->ct_labels)); 1680 } 1681 1682 return 0; 1683 } 1684 1685 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1686 struct fl_flow_key *key, struct fl_flow_key *mask, 1687 int vthresh) 1688 { 1689 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1690 1691 if (!tb) { 1692 *ethertype = 0; 1693 return good_num_of_vlans; 1694 } 1695 1696 *ethertype = nla_get_be16(tb); 1697 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1698 return true; 1699 1700 key->basic.n_proto = *ethertype; 1701 mask->basic.n_proto = cpu_to_be16(~0); 1702 return false; 1703 } 1704 1705 static void fl_set_key_cfm_md_level(struct nlattr **tb, 1706 struct fl_flow_key *key, 1707 struct fl_flow_key *mask, 1708 struct netlink_ext_ack *extack) 1709 { 1710 u8 level; 1711 1712 if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) 1713 return; 1714 1715 level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); 1716 key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); 1717 mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; 1718 } 1719 1720 static void fl_set_key_cfm_opcode(struct nlattr **tb, 1721 struct fl_flow_key *key, 1722 struct fl_flow_key *mask, 1723 struct netlink_ext_ack *extack) 1724 { 1725 fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, 1726 &mask->cfm.opcode, TCA_FLOWER_UNSPEC, 1727 sizeof(key->cfm.opcode)); 1728 } 1729 1730 static int fl_set_key_cfm(struct nlattr **tb, 1731 struct fl_flow_key *key, 1732 struct fl_flow_key *mask, 1733 struct netlink_ext_ack *extack) 1734 { 1735 struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1]; 1736 int err; 1737 1738 if (!tb[TCA_FLOWER_KEY_CFM]) 1739 return 0; 1740 1741 err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, 1742 tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); 1743 if (err < 0) 1744 return err; 1745 1746 fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); 1747 fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 1748 1749 return 0; 1750 } 1751 1752 static int fl_set_key(struct net *net, struct nlattr **tb, 1753 struct fl_flow_key *key, struct fl_flow_key *mask, 1754 struct netlink_ext_ack *extack) 1755 { 1756 __be16 ethertype; 1757 int ret = 0; 1758 1759 if (tb[TCA_FLOWER_INDEV]) { 1760 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1761 if (err < 0) 1762 return err; 1763 key->meta.ingress_ifindex = err; 1764 mask->meta.ingress_ifindex = 0xffffffff; 1765 } 1766 1767 fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, 1768 &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, 1769 sizeof(key->meta.l2_miss)); 1770 1771 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1772 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1773 sizeof(key->eth.dst)); 1774 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1775 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1776 sizeof(key->eth.src)); 1777 fl_set_key_val(tb, &key->num_of_vlans, 1778 TCA_FLOWER_KEY_NUM_OF_VLANS, 1779 &mask->num_of_vlans, 1780 TCA_FLOWER_UNSPEC, 1781 sizeof(key->num_of_vlans)); 1782 1783 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1784 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1785 TCA_FLOWER_KEY_VLAN_PRIO, 1786 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1787 &key->vlan, &mask->vlan); 1788 1789 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1790 ðertype, key, mask, 1)) { 1791 fl_set_key_vlan(tb, ethertype, 1792 TCA_FLOWER_KEY_CVLAN_ID, 1793 TCA_FLOWER_KEY_CVLAN_PRIO, 1794 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1795 &key->cvlan, &mask->cvlan); 1796 fl_set_key_val(tb, &key->basic.n_proto, 1797 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1798 &mask->basic.n_proto, 1799 TCA_FLOWER_UNSPEC, 1800 sizeof(key->basic.n_proto)); 1801 } 1802 } 1803 1804 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1805 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1806 1807 if (key->basic.n_proto == htons(ETH_P_IP) || 1808 key->basic.n_proto == htons(ETH_P_IPV6)) { 1809 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1810 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1811 sizeof(key->basic.ip_proto)); 1812 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1813 } 1814 1815 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1816 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1817 mask->control.addr_type = ~0; 1818 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1819 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1820 sizeof(key->ipv4.src)); 1821 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1822 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1823 sizeof(key->ipv4.dst)); 1824 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1825 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1826 mask->control.addr_type = ~0; 1827 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1828 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1829 sizeof(key->ipv6.src)); 1830 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1831 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1832 sizeof(key->ipv6.dst)); 1833 } 1834 1835 if (key->basic.ip_proto == IPPROTO_TCP) { 1836 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1837 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1838 sizeof(key->tp.src)); 1839 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1840 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1841 sizeof(key->tp.dst)); 1842 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1843 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1844 sizeof(key->tcp.flags)); 1845 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1846 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1847 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1848 sizeof(key->tp.src)); 1849 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1850 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1851 sizeof(key->tp.dst)); 1852 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1853 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1854 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1855 sizeof(key->tp.src)); 1856 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1857 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1858 sizeof(key->tp.dst)); 1859 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1860 key->basic.ip_proto == IPPROTO_ICMP) { 1861 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1862 &mask->icmp.type, 1863 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1864 sizeof(key->icmp.type)); 1865 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1866 &mask->icmp.code, 1867 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1868 sizeof(key->icmp.code)); 1869 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1870 key->basic.ip_proto == IPPROTO_ICMPV6) { 1871 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1872 &mask->icmp.type, 1873 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1874 sizeof(key->icmp.type)); 1875 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1876 &mask->icmp.code, 1877 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1878 sizeof(key->icmp.code)); 1879 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1880 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1881 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1882 if (ret) 1883 return ret; 1884 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1885 key->basic.n_proto == htons(ETH_P_RARP)) { 1886 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1887 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1888 sizeof(key->arp.sip)); 1889 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1890 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1891 sizeof(key->arp.tip)); 1892 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1893 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1894 sizeof(key->arp.op)); 1895 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1896 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1897 sizeof(key->arp.sha)); 1898 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1899 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1900 sizeof(key->arp.tha)); 1901 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 1902 fl_set_key_val(tb, &key->l2tpv3.session_id, 1903 TCA_FLOWER_KEY_L2TPV3_SID, 1904 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 1905 sizeof(key->l2tpv3.session_id)); 1906 } else if (key->basic.n_proto == htons(ETH_P_CFM)) { 1907 ret = fl_set_key_cfm(tb, key, mask, extack); 1908 if (ret) 1909 return ret; 1910 } 1911 1912 if (key->basic.ip_proto == IPPROTO_TCP || 1913 key->basic.ip_proto == IPPROTO_UDP || 1914 key->basic.ip_proto == IPPROTO_SCTP) { 1915 ret = fl_set_key_port_range(tb, key, mask, extack); 1916 if (ret) 1917 return ret; 1918 } 1919 1920 if (tb[TCA_FLOWER_KEY_SPI]) { 1921 ret = fl_set_key_spi(tb, key, mask, extack); 1922 if (ret) 1923 return ret; 1924 } 1925 1926 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1927 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1928 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1929 mask->enc_control.addr_type = ~0; 1930 fl_set_key_val(tb, &key->enc_ipv4.src, 1931 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1932 &mask->enc_ipv4.src, 1933 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1934 sizeof(key->enc_ipv4.src)); 1935 fl_set_key_val(tb, &key->enc_ipv4.dst, 1936 TCA_FLOWER_KEY_ENC_IPV4_DST, 1937 &mask->enc_ipv4.dst, 1938 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1939 sizeof(key->enc_ipv4.dst)); 1940 } 1941 1942 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1943 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1944 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1945 mask->enc_control.addr_type = ~0; 1946 fl_set_key_val(tb, &key->enc_ipv6.src, 1947 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1948 &mask->enc_ipv6.src, 1949 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1950 sizeof(key->enc_ipv6.src)); 1951 fl_set_key_val(tb, &key->enc_ipv6.dst, 1952 TCA_FLOWER_KEY_ENC_IPV6_DST, 1953 &mask->enc_ipv6.dst, 1954 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1955 sizeof(key->enc_ipv6.dst)); 1956 } 1957 1958 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1959 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1960 sizeof(key->enc_key_id.keyid)); 1961 1962 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1963 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1964 sizeof(key->enc_tp.src)); 1965 1966 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1967 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1968 sizeof(key->enc_tp.dst)); 1969 1970 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1971 1972 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1973 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1974 sizeof(key->hash.hash)); 1975 1976 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1977 ret = fl_set_enc_opt(tb, key, mask, extack); 1978 if (ret) 1979 return ret; 1980 } 1981 1982 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1983 if (ret) 1984 return ret; 1985 1986 if (tb[TCA_FLOWER_KEY_FLAGS]) 1987 ret = fl_set_key_flags(tb, &key->control.flags, 1988 &mask->control.flags, extack); 1989 1990 return ret; 1991 } 1992 1993 static void fl_mask_copy(struct fl_flow_mask *dst, 1994 struct fl_flow_mask *src) 1995 { 1996 const void *psrc = fl_key_get_start(&src->key, src); 1997 void *pdst = fl_key_get_start(&dst->key, src); 1998 1999 memcpy(pdst, psrc, fl_mask_range(src)); 2000 dst->range = src->range; 2001 } 2002 2003 static const struct rhashtable_params fl_ht_params = { 2004 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 2005 .head_offset = offsetof(struct cls_fl_filter, ht_node), 2006 .automatic_shrinking = true, 2007 }; 2008 2009 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 2010 { 2011 mask->filter_ht_params = fl_ht_params; 2012 mask->filter_ht_params.key_len = fl_mask_range(mask); 2013 mask->filter_ht_params.key_offset += mask->range.start; 2014 2015 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 2016 } 2017 2018 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 2019 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 2020 2021 #define FL_KEY_IS_MASKED(mask, member) \ 2022 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 2023 0, FL_KEY_MEMBER_SIZE(member)) \ 2024 2025 #define FL_KEY_SET(keys, cnt, id, member) \ 2026 do { \ 2027 keys[cnt].key_id = id; \ 2028 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 2029 cnt++; \ 2030 } while(0); 2031 2032 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 2033 do { \ 2034 if (FL_KEY_IS_MASKED(mask, member)) \ 2035 FL_KEY_SET(keys, cnt, id, member); \ 2036 } while(0); 2037 2038 static void fl_init_dissector(struct flow_dissector *dissector, 2039 struct fl_flow_key *mask) 2040 { 2041 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 2042 size_t cnt = 0; 2043 2044 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2045 FLOW_DISSECTOR_KEY_META, meta); 2046 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 2047 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 2048 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2049 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 2050 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2051 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 2052 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2053 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 2054 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2055 FLOW_DISSECTOR_KEY_PORTS, tp); 2056 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2057 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 2058 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2059 FLOW_DISSECTOR_KEY_IP, ip); 2060 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2061 FLOW_DISSECTOR_KEY_TCP, tcp); 2062 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2063 FLOW_DISSECTOR_KEY_ICMP, icmp); 2064 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2065 FLOW_DISSECTOR_KEY_ARP, arp); 2066 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2067 FLOW_DISSECTOR_KEY_MPLS, mpls); 2068 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2069 FLOW_DISSECTOR_KEY_VLAN, vlan); 2070 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2071 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 2072 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2073 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 2074 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2075 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 2076 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2077 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 2078 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 2079 FL_KEY_IS_MASKED(mask, enc_ipv6)) 2080 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 2081 enc_control); 2082 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2083 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 2084 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2085 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 2086 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2087 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 2088 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2089 FLOW_DISSECTOR_KEY_CT, ct); 2090 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2091 FLOW_DISSECTOR_KEY_HASH, hash); 2092 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2093 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 2094 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2095 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 2096 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2097 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 2098 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2099 FLOW_DISSECTOR_KEY_IPSEC, ipsec); 2100 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2101 FLOW_DISSECTOR_KEY_CFM, cfm); 2102 2103 skb_flow_dissector_init(dissector, keys, cnt); 2104 } 2105 2106 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 2107 struct fl_flow_mask *mask) 2108 { 2109 struct fl_flow_mask *newmask; 2110 int err; 2111 2112 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 2113 if (!newmask) 2114 return ERR_PTR(-ENOMEM); 2115 2116 fl_mask_copy(newmask, mask); 2117 2118 if ((newmask->key.tp_range.tp_min.dst && 2119 newmask->key.tp_range.tp_max.dst) || 2120 (newmask->key.tp_range.tp_min.src && 2121 newmask->key.tp_range.tp_max.src)) 2122 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2123 2124 err = fl_init_mask_hashtable(newmask); 2125 if (err) 2126 goto errout_free; 2127 2128 fl_init_dissector(&newmask->dissector, &newmask->key); 2129 2130 INIT_LIST_HEAD_RCU(&newmask->filters); 2131 2132 refcount_set(&newmask->refcnt, 1); 2133 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2134 &newmask->ht_node, mask_ht_params); 2135 if (err) 2136 goto errout_destroy; 2137 2138 spin_lock(&head->masks_lock); 2139 list_add_tail_rcu(&newmask->list, &head->masks); 2140 spin_unlock(&head->masks_lock); 2141 2142 return newmask; 2143 2144 errout_destroy: 2145 rhashtable_destroy(&newmask->ht); 2146 errout_free: 2147 kfree(newmask); 2148 2149 return ERR_PTR(err); 2150 } 2151 2152 static int fl_check_assign_mask(struct cls_fl_head *head, 2153 struct cls_fl_filter *fnew, 2154 struct cls_fl_filter *fold, 2155 struct fl_flow_mask *mask) 2156 { 2157 struct fl_flow_mask *newmask; 2158 int ret = 0; 2159 2160 rcu_read_lock(); 2161 2162 /* Insert mask as temporary node to prevent concurrent creation of mask 2163 * with same key. Any concurrent lookups with same key will return 2164 * -EAGAIN because mask's refcnt is zero. 2165 */ 2166 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2167 &mask->ht_node, 2168 mask_ht_params); 2169 if (!fnew->mask) { 2170 rcu_read_unlock(); 2171 2172 if (fold) { 2173 ret = -EINVAL; 2174 goto errout_cleanup; 2175 } 2176 2177 newmask = fl_create_new_mask(head, mask); 2178 if (IS_ERR(newmask)) { 2179 ret = PTR_ERR(newmask); 2180 goto errout_cleanup; 2181 } 2182 2183 fnew->mask = newmask; 2184 return 0; 2185 } else if (IS_ERR(fnew->mask)) { 2186 ret = PTR_ERR(fnew->mask); 2187 } else if (fold && fold->mask != fnew->mask) { 2188 ret = -EINVAL; 2189 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2190 /* Mask was deleted concurrently, try again */ 2191 ret = -EAGAIN; 2192 } 2193 rcu_read_unlock(); 2194 return ret; 2195 2196 errout_cleanup: 2197 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2198 mask_ht_params); 2199 return ret; 2200 } 2201 2202 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) 2203 { 2204 return mask->meta.l2_miss; 2205 } 2206 2207 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2208 struct cls_fl_filter *fold, 2209 bool *in_ht) 2210 { 2211 struct fl_flow_mask *mask = fnew->mask; 2212 int err; 2213 2214 err = rhashtable_lookup_insert_fast(&mask->ht, 2215 &fnew->ht_node, 2216 mask->filter_ht_params); 2217 if (err) { 2218 *in_ht = false; 2219 /* It is okay if filter with same key exists when 2220 * overwriting. 2221 */ 2222 return fold && err == -EEXIST ? 0 : err; 2223 } 2224 2225 *in_ht = true; 2226 return 0; 2227 } 2228 2229 static int fl_change(struct net *net, struct sk_buff *in_skb, 2230 struct tcf_proto *tp, unsigned long base, 2231 u32 handle, struct nlattr **tca, 2232 void **arg, u32 flags, 2233 struct netlink_ext_ack *extack) 2234 { 2235 struct cls_fl_head *head = fl_head_dereference(tp); 2236 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2237 struct cls_fl_filter *fold = *arg; 2238 bool bound_to_filter = false; 2239 struct cls_fl_filter *fnew; 2240 struct fl_flow_mask *mask; 2241 struct nlattr **tb; 2242 bool in_ht; 2243 int err; 2244 2245 if (!tca[TCA_OPTIONS]) { 2246 err = -EINVAL; 2247 goto errout_fold; 2248 } 2249 2250 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2251 if (!mask) { 2252 err = -ENOBUFS; 2253 goto errout_fold; 2254 } 2255 2256 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2257 if (!tb) { 2258 err = -ENOBUFS; 2259 goto errout_mask_alloc; 2260 } 2261 2262 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2263 tca[TCA_OPTIONS], fl_policy, NULL); 2264 if (err < 0) 2265 goto errout_tb; 2266 2267 if (fold && handle && fold->handle != handle) { 2268 err = -EINVAL; 2269 goto errout_tb; 2270 } 2271 2272 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2273 if (!fnew) { 2274 err = -ENOBUFS; 2275 goto errout_tb; 2276 } 2277 INIT_LIST_HEAD(&fnew->hw_list); 2278 refcount_set(&fnew->refcnt, 1); 2279 2280 if (tb[TCA_FLOWER_FLAGS]) { 2281 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2282 2283 if (!tc_flags_valid(fnew->flags)) { 2284 kfree(fnew); 2285 err = -EINVAL; 2286 goto errout_tb; 2287 } 2288 } 2289 2290 if (!fold) { 2291 spin_lock(&tp->lock); 2292 if (!handle) { 2293 handle = 1; 2294 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2295 INT_MAX, GFP_ATOMIC); 2296 } else { 2297 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2298 handle, GFP_ATOMIC); 2299 2300 /* Filter with specified handle was concurrently 2301 * inserted after initial check in cls_api. This is not 2302 * necessarily an error if NLM_F_EXCL is not set in 2303 * message flags. Returning EAGAIN will cause cls_api to 2304 * try to update concurrently inserted rule. 2305 */ 2306 if (err == -ENOSPC) 2307 err = -EAGAIN; 2308 } 2309 spin_unlock(&tp->lock); 2310 2311 if (err) { 2312 kfree(fnew); 2313 goto errout_tb; 2314 } 2315 } 2316 fnew->handle = handle; 2317 2318 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2319 !tc_skip_hw(fnew->flags)); 2320 if (err < 0) 2321 goto errout_idr; 2322 2323 err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], 2324 &fnew->exts, flags, fnew->flags, 2325 extack); 2326 if (err < 0) 2327 goto errout_idr; 2328 2329 if (tb[TCA_FLOWER_CLASSID]) { 2330 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2331 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2332 rtnl_lock(); 2333 tcf_bind_filter(tp, &fnew->res, base); 2334 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2335 rtnl_unlock(); 2336 bound_to_filter = true; 2337 } 2338 2339 err = fl_set_key(net, tb, &fnew->key, &mask->key, extack); 2340 if (err) 2341 goto unbind_filter; 2342 2343 fl_mask_update_range(mask); 2344 fl_set_masked_key(&fnew->mkey, &fnew->key, mask); 2345 2346 if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { 2347 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2348 err = -EINVAL; 2349 goto unbind_filter; 2350 } 2351 2352 /* Enable tc skb extension if filter matches on data extracted from 2353 * this extension. 2354 */ 2355 if (fl_needs_tc_skb_ext(&mask->key)) { 2356 fnew->needs_tc_skb_ext = 1; 2357 tc_skb_ext_tc_enable(); 2358 } 2359 2360 err = fl_check_assign_mask(head, fnew, fold, mask); 2361 if (err) 2362 goto unbind_filter; 2363 2364 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2365 if (err) 2366 goto errout_mask; 2367 2368 if (!tc_skip_hw(fnew->flags)) { 2369 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2370 if (err) 2371 goto errout_ht; 2372 } 2373 2374 if (!tc_in_hw(fnew->flags)) 2375 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2376 2377 spin_lock(&tp->lock); 2378 2379 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2380 * proto again or create new one, if necessary. 2381 */ 2382 if (tp->deleting) { 2383 err = -EAGAIN; 2384 goto errout_hw; 2385 } 2386 2387 if (fold) { 2388 /* Fold filter was deleted concurrently. Retry lookup. */ 2389 if (fold->deleted) { 2390 err = -EAGAIN; 2391 goto errout_hw; 2392 } 2393 2394 fnew->handle = handle; 2395 2396 if (!in_ht) { 2397 struct rhashtable_params params = 2398 fnew->mask->filter_ht_params; 2399 2400 err = rhashtable_insert_fast(&fnew->mask->ht, 2401 &fnew->ht_node, 2402 params); 2403 if (err) 2404 goto errout_hw; 2405 in_ht = true; 2406 } 2407 2408 refcount_inc(&fnew->refcnt); 2409 rhashtable_remove_fast(&fold->mask->ht, 2410 &fold->ht_node, 2411 fold->mask->filter_ht_params); 2412 idr_replace(&head->handle_idr, fnew, fnew->handle); 2413 list_replace_rcu(&fold->list, &fnew->list); 2414 fold->deleted = true; 2415 2416 spin_unlock(&tp->lock); 2417 2418 fl_mask_put(head, fold->mask); 2419 if (!tc_skip_hw(fold->flags)) 2420 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2421 tcf_unbind_filter(tp, &fold->res); 2422 /* Caller holds reference to fold, so refcnt is always > 0 2423 * after this. 2424 */ 2425 refcount_dec(&fold->refcnt); 2426 __fl_put(fold); 2427 } else { 2428 idr_replace(&head->handle_idr, fnew, fnew->handle); 2429 2430 refcount_inc(&fnew->refcnt); 2431 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2432 spin_unlock(&tp->lock); 2433 } 2434 2435 *arg = fnew; 2436 2437 kfree(tb); 2438 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2439 return 0; 2440 2441 errout_ht: 2442 spin_lock(&tp->lock); 2443 errout_hw: 2444 fnew->deleted = true; 2445 spin_unlock(&tp->lock); 2446 if (!tc_skip_hw(fnew->flags)) 2447 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2448 if (in_ht) 2449 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2450 fnew->mask->filter_ht_params); 2451 errout_mask: 2452 fl_mask_put(head, fnew->mask); 2453 2454 unbind_filter: 2455 if (bound_to_filter) { 2456 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2457 rtnl_lock(); 2458 tcf_unbind_filter(tp, &fnew->res); 2459 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2460 rtnl_unlock(); 2461 } 2462 2463 errout_idr: 2464 if (!fold) { 2465 spin_lock(&tp->lock); 2466 idr_remove(&head->handle_idr, fnew->handle); 2467 spin_unlock(&tp->lock); 2468 } 2469 __fl_put(fnew); 2470 errout_tb: 2471 kfree(tb); 2472 errout_mask_alloc: 2473 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2474 errout_fold: 2475 if (fold) 2476 __fl_put(fold); 2477 return err; 2478 } 2479 2480 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2481 bool rtnl_held, struct netlink_ext_ack *extack) 2482 { 2483 struct cls_fl_head *head = fl_head_dereference(tp); 2484 struct cls_fl_filter *f = arg; 2485 bool last_on_mask; 2486 int err = 0; 2487 2488 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2489 *last = list_empty(&head->masks); 2490 __fl_put(f); 2491 2492 return err; 2493 } 2494 2495 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2496 bool rtnl_held) 2497 { 2498 struct cls_fl_head *head = fl_head_dereference(tp); 2499 unsigned long id = arg->cookie, tmp; 2500 struct cls_fl_filter *f; 2501 2502 arg->count = arg->skip; 2503 2504 rcu_read_lock(); 2505 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2506 /* don't return filters that are being deleted */ 2507 if (!f || !refcount_inc_not_zero(&f->refcnt)) 2508 continue; 2509 rcu_read_unlock(); 2510 2511 if (arg->fn(tp, f, arg) < 0) { 2512 __fl_put(f); 2513 arg->stop = 1; 2514 rcu_read_lock(); 2515 break; 2516 } 2517 __fl_put(f); 2518 arg->count++; 2519 rcu_read_lock(); 2520 } 2521 rcu_read_unlock(); 2522 arg->cookie = id; 2523 } 2524 2525 static struct cls_fl_filter * 2526 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2527 { 2528 struct cls_fl_head *head = fl_head_dereference(tp); 2529 2530 spin_lock(&tp->lock); 2531 if (list_empty(&head->hw_filters)) { 2532 spin_unlock(&tp->lock); 2533 return NULL; 2534 } 2535 2536 if (!f) 2537 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2538 hw_list); 2539 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2540 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2541 spin_unlock(&tp->lock); 2542 return f; 2543 } 2544 } 2545 2546 spin_unlock(&tp->lock); 2547 return NULL; 2548 } 2549 2550 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2551 void *cb_priv, struct netlink_ext_ack *extack) 2552 { 2553 struct tcf_block *block = tp->chain->block; 2554 struct flow_cls_offload cls_flower = {}; 2555 struct cls_fl_filter *f = NULL; 2556 int err; 2557 2558 /* hw_filters list can only be changed by hw offload functions after 2559 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2560 * iterating it. 2561 */ 2562 ASSERT_RTNL(); 2563 2564 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2565 cls_flower.rule = 2566 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2567 if (!cls_flower.rule) { 2568 __fl_put(f); 2569 return -ENOMEM; 2570 } 2571 2572 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2573 extack); 2574 cls_flower.command = add ? 2575 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2576 cls_flower.cookie = (unsigned long)f; 2577 cls_flower.rule->match.dissector = &f->mask->dissector; 2578 cls_flower.rule->match.mask = &f->mask->key; 2579 cls_flower.rule->match.key = &f->mkey; 2580 2581 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2582 cls_flower.common.extack); 2583 if (err) { 2584 kfree(cls_flower.rule); 2585 if (tc_skip_sw(f->flags)) { 2586 __fl_put(f); 2587 return err; 2588 } 2589 goto next_flow; 2590 } 2591 2592 cls_flower.classid = f->res.classid; 2593 2594 err = tc_setup_cb_reoffload(block, tp, add, cb, 2595 TC_SETUP_CLSFLOWER, &cls_flower, 2596 cb_priv, &f->flags, 2597 &f->in_hw_count); 2598 tc_cleanup_offload_action(&cls_flower.rule->action); 2599 kfree(cls_flower.rule); 2600 2601 if (err) { 2602 __fl_put(f); 2603 return err; 2604 } 2605 next_flow: 2606 __fl_put(f); 2607 } 2608 2609 return 0; 2610 } 2611 2612 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2613 { 2614 struct flow_cls_offload *cls_flower = type_data; 2615 struct cls_fl_filter *f = 2616 (struct cls_fl_filter *) cls_flower->cookie; 2617 struct cls_fl_head *head = fl_head_dereference(tp); 2618 2619 spin_lock(&tp->lock); 2620 list_add(&f->hw_list, &head->hw_filters); 2621 spin_unlock(&tp->lock); 2622 } 2623 2624 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2625 { 2626 struct flow_cls_offload *cls_flower = type_data; 2627 struct cls_fl_filter *f = 2628 (struct cls_fl_filter *) cls_flower->cookie; 2629 2630 spin_lock(&tp->lock); 2631 if (!list_empty(&f->hw_list)) 2632 list_del_init(&f->hw_list); 2633 spin_unlock(&tp->lock); 2634 } 2635 2636 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2637 struct fl_flow_tmplt *tmplt) 2638 { 2639 struct flow_cls_offload cls_flower = {}; 2640 struct tcf_block *block = chain->block; 2641 2642 cls_flower.rule = flow_rule_alloc(0); 2643 if (!cls_flower.rule) 2644 return -ENOMEM; 2645 2646 cls_flower.common.chain_index = chain->index; 2647 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2648 cls_flower.cookie = (unsigned long) tmplt; 2649 cls_flower.rule->match.dissector = &tmplt->dissector; 2650 cls_flower.rule->match.mask = &tmplt->mask; 2651 cls_flower.rule->match.key = &tmplt->dummy_key; 2652 2653 /* We don't care if driver (any of them) fails to handle this 2654 * call. It serves just as a hint for it. 2655 */ 2656 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2657 kfree(cls_flower.rule); 2658 2659 return 0; 2660 } 2661 2662 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2663 struct fl_flow_tmplt *tmplt) 2664 { 2665 struct flow_cls_offload cls_flower = {}; 2666 struct tcf_block *block = chain->block; 2667 2668 cls_flower.common.chain_index = chain->index; 2669 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2670 cls_flower.cookie = (unsigned long) tmplt; 2671 2672 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2673 } 2674 2675 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2676 struct nlattr **tca, 2677 struct netlink_ext_ack *extack) 2678 { 2679 struct fl_flow_tmplt *tmplt; 2680 struct nlattr **tb; 2681 int err; 2682 2683 if (!tca[TCA_OPTIONS]) 2684 return ERR_PTR(-EINVAL); 2685 2686 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2687 if (!tb) 2688 return ERR_PTR(-ENOBUFS); 2689 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2690 tca[TCA_OPTIONS], fl_policy, NULL); 2691 if (err) 2692 goto errout_tb; 2693 2694 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2695 if (!tmplt) { 2696 err = -ENOMEM; 2697 goto errout_tb; 2698 } 2699 tmplt->chain = chain; 2700 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2701 if (err) 2702 goto errout_tmplt; 2703 2704 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2705 2706 err = fl_hw_create_tmplt(chain, tmplt); 2707 if (err) 2708 goto errout_tmplt; 2709 2710 kfree(tb); 2711 return tmplt; 2712 2713 errout_tmplt: 2714 kfree(tmplt); 2715 errout_tb: 2716 kfree(tb); 2717 return ERR_PTR(err); 2718 } 2719 2720 static void fl_tmplt_destroy(void *tmplt_priv) 2721 { 2722 struct fl_flow_tmplt *tmplt = tmplt_priv; 2723 2724 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2725 kfree(tmplt); 2726 } 2727 2728 static void fl_tmplt_reoffload(struct tcf_chain *chain, bool add, 2729 flow_setup_cb_t *cb, void *cb_priv) 2730 { 2731 struct fl_flow_tmplt *tmplt = chain->tmplt_priv; 2732 struct flow_cls_offload cls_flower = {}; 2733 2734 cls_flower.rule = flow_rule_alloc(0); 2735 if (!cls_flower.rule) 2736 return; 2737 2738 cls_flower.common.chain_index = chain->index; 2739 cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE : 2740 FLOW_CLS_TMPLT_DESTROY; 2741 cls_flower.cookie = (unsigned long) tmplt; 2742 cls_flower.rule->match.dissector = &tmplt->dissector; 2743 cls_flower.rule->match.mask = &tmplt->mask; 2744 cls_flower.rule->match.key = &tmplt->dummy_key; 2745 2746 cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 2747 kfree(cls_flower.rule); 2748 } 2749 2750 static int fl_dump_key_val(struct sk_buff *skb, 2751 void *val, int val_type, 2752 void *mask, int mask_type, int len) 2753 { 2754 int err; 2755 2756 if (!memchr_inv(mask, 0, len)) 2757 return 0; 2758 err = nla_put(skb, val_type, len, val); 2759 if (err) 2760 return err; 2761 if (mask_type != TCA_FLOWER_UNSPEC) { 2762 err = nla_put(skb, mask_type, len, mask); 2763 if (err) 2764 return err; 2765 } 2766 return 0; 2767 } 2768 2769 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2770 struct fl_flow_key *mask) 2771 { 2772 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2773 TCA_FLOWER_KEY_PORT_DST_MIN, 2774 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2775 sizeof(key->tp_range.tp_min.dst)) || 2776 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2777 TCA_FLOWER_KEY_PORT_DST_MAX, 2778 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2779 sizeof(key->tp_range.tp_max.dst)) || 2780 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2781 TCA_FLOWER_KEY_PORT_SRC_MIN, 2782 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2783 sizeof(key->tp_range.tp_min.src)) || 2784 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2785 TCA_FLOWER_KEY_PORT_SRC_MAX, 2786 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2787 sizeof(key->tp_range.tp_max.src))) 2788 return -1; 2789 2790 return 0; 2791 } 2792 2793 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2794 struct flow_dissector_key_mpls *mpls_key, 2795 struct flow_dissector_key_mpls *mpls_mask, 2796 u8 lse_index) 2797 { 2798 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2799 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2800 int err; 2801 2802 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2803 lse_index + 1); 2804 if (err) 2805 return err; 2806 2807 if (lse_mask->mpls_ttl) { 2808 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2809 lse_key->mpls_ttl); 2810 if (err) 2811 return err; 2812 } 2813 if (lse_mask->mpls_bos) { 2814 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2815 lse_key->mpls_bos); 2816 if (err) 2817 return err; 2818 } 2819 if (lse_mask->mpls_tc) { 2820 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2821 lse_key->mpls_tc); 2822 if (err) 2823 return err; 2824 } 2825 if (lse_mask->mpls_label) { 2826 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2827 lse_key->mpls_label); 2828 if (err) 2829 return err; 2830 } 2831 2832 return 0; 2833 } 2834 2835 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2836 struct flow_dissector_key_mpls *mpls_key, 2837 struct flow_dissector_key_mpls *mpls_mask) 2838 { 2839 struct nlattr *opts; 2840 struct nlattr *lse; 2841 u8 lse_index; 2842 int err; 2843 2844 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2845 if (!opts) 2846 return -EMSGSIZE; 2847 2848 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2849 if (!(mpls_mask->used_lses & 1 << lse_index)) 2850 continue; 2851 2852 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2853 if (!lse) { 2854 err = -EMSGSIZE; 2855 goto err_opts; 2856 } 2857 2858 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2859 lse_index); 2860 if (err) 2861 goto err_opts_lse; 2862 nla_nest_end(skb, lse); 2863 } 2864 nla_nest_end(skb, opts); 2865 2866 return 0; 2867 2868 err_opts_lse: 2869 nla_nest_cancel(skb, lse); 2870 err_opts: 2871 nla_nest_cancel(skb, opts); 2872 2873 return err; 2874 } 2875 2876 static int fl_dump_key_mpls(struct sk_buff *skb, 2877 struct flow_dissector_key_mpls *mpls_key, 2878 struct flow_dissector_key_mpls *mpls_mask) 2879 { 2880 struct flow_dissector_mpls_lse *lse_mask; 2881 struct flow_dissector_mpls_lse *lse_key; 2882 int err; 2883 2884 if (!mpls_mask->used_lses) 2885 return 0; 2886 2887 lse_mask = &mpls_mask->ls[0]; 2888 lse_key = &mpls_key->ls[0]; 2889 2890 /* For backward compatibility, don't use the MPLS nested attributes if 2891 * the rule can be expressed using the old attributes. 2892 */ 2893 if (mpls_mask->used_lses & ~1 || 2894 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2895 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2896 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2897 2898 if (lse_mask->mpls_ttl) { 2899 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2900 lse_key->mpls_ttl); 2901 if (err) 2902 return err; 2903 } 2904 if (lse_mask->mpls_tc) { 2905 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2906 lse_key->mpls_tc); 2907 if (err) 2908 return err; 2909 } 2910 if (lse_mask->mpls_label) { 2911 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2912 lse_key->mpls_label); 2913 if (err) 2914 return err; 2915 } 2916 if (lse_mask->mpls_bos) { 2917 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2918 lse_key->mpls_bos); 2919 if (err) 2920 return err; 2921 } 2922 return 0; 2923 } 2924 2925 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2926 struct flow_dissector_key_ip *key, 2927 struct flow_dissector_key_ip *mask) 2928 { 2929 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2930 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2931 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2932 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2933 2934 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2935 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2936 return -1; 2937 2938 return 0; 2939 } 2940 2941 static int fl_dump_key_vlan(struct sk_buff *skb, 2942 int vlan_id_key, int vlan_prio_key, 2943 struct flow_dissector_key_vlan *vlan_key, 2944 struct flow_dissector_key_vlan *vlan_mask) 2945 { 2946 int err; 2947 2948 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2949 return 0; 2950 if (vlan_mask->vlan_id) { 2951 err = nla_put_u16(skb, vlan_id_key, 2952 vlan_key->vlan_id); 2953 if (err) 2954 return err; 2955 } 2956 if (vlan_mask->vlan_priority) { 2957 err = nla_put_u8(skb, vlan_prio_key, 2958 vlan_key->vlan_priority); 2959 if (err) 2960 return err; 2961 } 2962 return 0; 2963 } 2964 2965 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2966 u32 *flower_key, u32 *flower_mask, 2967 u32 flower_flag_bit, u32 dissector_flag_bit) 2968 { 2969 if (dissector_mask & dissector_flag_bit) { 2970 *flower_mask |= flower_flag_bit; 2971 if (dissector_key & dissector_flag_bit) 2972 *flower_key |= flower_flag_bit; 2973 } 2974 } 2975 2976 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2977 { 2978 u32 key, mask; 2979 __be32 _key, _mask; 2980 int err; 2981 2982 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2983 return 0; 2984 2985 key = 0; 2986 mask = 0; 2987 2988 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2989 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2990 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2991 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2992 FLOW_DIS_FIRST_FRAG); 2993 2994 _key = cpu_to_be32(key); 2995 _mask = cpu_to_be32(mask); 2996 2997 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2998 if (err) 2999 return err; 3000 3001 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 3002 } 3003 3004 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 3005 struct flow_dissector_key_enc_opts *enc_opts) 3006 { 3007 struct geneve_opt *opt; 3008 struct nlattr *nest; 3009 int opt_off = 0; 3010 3011 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 3012 if (!nest) 3013 goto nla_put_failure; 3014 3015 while (enc_opts->len > opt_off) { 3016 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 3017 3018 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 3019 opt->opt_class)) 3020 goto nla_put_failure; 3021 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 3022 opt->type)) 3023 goto nla_put_failure; 3024 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 3025 opt->length * 4, opt->opt_data)) 3026 goto nla_put_failure; 3027 3028 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 3029 } 3030 nla_nest_end(skb, nest); 3031 return 0; 3032 3033 nla_put_failure: 3034 nla_nest_cancel(skb, nest); 3035 return -EMSGSIZE; 3036 } 3037 3038 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 3039 struct flow_dissector_key_enc_opts *enc_opts) 3040 { 3041 struct vxlan_metadata *md; 3042 struct nlattr *nest; 3043 3044 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 3045 if (!nest) 3046 goto nla_put_failure; 3047 3048 md = (struct vxlan_metadata *)&enc_opts->data[0]; 3049 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 3050 goto nla_put_failure; 3051 3052 nla_nest_end(skb, nest); 3053 return 0; 3054 3055 nla_put_failure: 3056 nla_nest_cancel(skb, nest); 3057 return -EMSGSIZE; 3058 } 3059 3060 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 3061 struct flow_dissector_key_enc_opts *enc_opts) 3062 { 3063 struct erspan_metadata *md; 3064 struct nlattr *nest; 3065 3066 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 3067 if (!nest) 3068 goto nla_put_failure; 3069 3070 md = (struct erspan_metadata *)&enc_opts->data[0]; 3071 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 3072 goto nla_put_failure; 3073 3074 if (md->version == 1 && 3075 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 3076 goto nla_put_failure; 3077 3078 if (md->version == 2 && 3079 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 3080 md->u.md2.dir) || 3081 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 3082 get_hwid(&md->u.md2)))) 3083 goto nla_put_failure; 3084 3085 nla_nest_end(skb, nest); 3086 return 0; 3087 3088 nla_put_failure: 3089 nla_nest_cancel(skb, nest); 3090 return -EMSGSIZE; 3091 } 3092 3093 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 3094 struct flow_dissector_key_enc_opts *enc_opts) 3095 3096 { 3097 struct gtp_pdu_session_info *session_info; 3098 struct nlattr *nest; 3099 3100 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 3101 if (!nest) 3102 goto nla_put_failure; 3103 3104 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 3105 3106 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 3107 session_info->pdu_type)) 3108 goto nla_put_failure; 3109 3110 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 3111 goto nla_put_failure; 3112 3113 nla_nest_end(skb, nest); 3114 return 0; 3115 3116 nla_put_failure: 3117 nla_nest_cancel(skb, nest); 3118 return -EMSGSIZE; 3119 } 3120 3121 static int fl_dump_key_ct(struct sk_buff *skb, 3122 struct flow_dissector_key_ct *key, 3123 struct flow_dissector_key_ct *mask) 3124 { 3125 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 3126 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 3127 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 3128 sizeof(key->ct_state))) 3129 goto nla_put_failure; 3130 3131 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 3132 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 3133 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 3134 sizeof(key->ct_zone))) 3135 goto nla_put_failure; 3136 3137 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3138 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 3139 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 3140 sizeof(key->ct_mark))) 3141 goto nla_put_failure; 3142 3143 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3144 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 3145 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 3146 sizeof(key->ct_labels))) 3147 goto nla_put_failure; 3148 3149 return 0; 3150 3151 nla_put_failure: 3152 return -EMSGSIZE; 3153 } 3154 3155 static int fl_dump_key_cfm(struct sk_buff *skb, 3156 struct flow_dissector_key_cfm *key, 3157 struct flow_dissector_key_cfm *mask) 3158 { 3159 struct nlattr *opts; 3160 int err; 3161 u8 mdl; 3162 3163 if (!memchr_inv(mask, 0, sizeof(*mask))) 3164 return 0; 3165 3166 opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); 3167 if (!opts) 3168 return -EMSGSIZE; 3169 3170 if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { 3171 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); 3172 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); 3173 if (err) 3174 goto err_cfm_opts; 3175 } 3176 3177 if (mask->opcode) { 3178 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); 3179 if (err) 3180 goto err_cfm_opts; 3181 } 3182 3183 nla_nest_end(skb, opts); 3184 3185 return 0; 3186 3187 err_cfm_opts: 3188 nla_nest_cancel(skb, opts); 3189 return err; 3190 } 3191 3192 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3193 struct flow_dissector_key_enc_opts *enc_opts) 3194 { 3195 struct nlattr *nest; 3196 int err; 3197 3198 if (!enc_opts->len) 3199 return 0; 3200 3201 nest = nla_nest_start_noflag(skb, enc_opt_type); 3202 if (!nest) 3203 goto nla_put_failure; 3204 3205 switch (enc_opts->dst_opt_type) { 3206 case TUNNEL_GENEVE_OPT: 3207 err = fl_dump_key_geneve_opt(skb, enc_opts); 3208 if (err) 3209 goto nla_put_failure; 3210 break; 3211 case TUNNEL_VXLAN_OPT: 3212 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3213 if (err) 3214 goto nla_put_failure; 3215 break; 3216 case TUNNEL_ERSPAN_OPT: 3217 err = fl_dump_key_erspan_opt(skb, enc_opts); 3218 if (err) 3219 goto nla_put_failure; 3220 break; 3221 case TUNNEL_GTP_OPT: 3222 err = fl_dump_key_gtp_opt(skb, enc_opts); 3223 if (err) 3224 goto nla_put_failure; 3225 break; 3226 default: 3227 goto nla_put_failure; 3228 } 3229 nla_nest_end(skb, nest); 3230 return 0; 3231 3232 nla_put_failure: 3233 nla_nest_cancel(skb, nest); 3234 return -EMSGSIZE; 3235 } 3236 3237 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3238 struct flow_dissector_key_enc_opts *key_opts, 3239 struct flow_dissector_key_enc_opts *msk_opts) 3240 { 3241 int err; 3242 3243 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3244 if (err) 3245 return err; 3246 3247 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3248 } 3249 3250 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3251 struct fl_flow_key *key, struct fl_flow_key *mask) 3252 { 3253 if (mask->meta.ingress_ifindex) { 3254 struct net_device *dev; 3255 3256 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3257 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3258 goto nla_put_failure; 3259 } 3260 3261 if (fl_dump_key_val(skb, &key->meta.l2_miss, 3262 TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, 3263 TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 3264 goto nla_put_failure; 3265 3266 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3267 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3268 sizeof(key->eth.dst)) || 3269 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3270 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3271 sizeof(key->eth.src)) || 3272 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3273 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3274 sizeof(key->basic.n_proto))) 3275 goto nla_put_failure; 3276 3277 if (mask->num_of_vlans.num_of_vlans) { 3278 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3279 goto nla_put_failure; 3280 } 3281 3282 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3283 goto nla_put_failure; 3284 3285 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3286 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3287 goto nla_put_failure; 3288 3289 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3290 TCA_FLOWER_KEY_CVLAN_PRIO, 3291 &key->cvlan, &mask->cvlan) || 3292 (mask->cvlan.vlan_tpid && 3293 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3294 key->cvlan.vlan_tpid))) 3295 goto nla_put_failure; 3296 3297 if (mask->basic.n_proto) { 3298 if (mask->cvlan.vlan_eth_type) { 3299 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3300 key->basic.n_proto)) 3301 goto nla_put_failure; 3302 } else if (mask->vlan.vlan_eth_type) { 3303 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3304 key->vlan.vlan_eth_type)) 3305 goto nla_put_failure; 3306 } 3307 } 3308 3309 if ((key->basic.n_proto == htons(ETH_P_IP) || 3310 key->basic.n_proto == htons(ETH_P_IPV6)) && 3311 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3312 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3313 sizeof(key->basic.ip_proto)) || 3314 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3315 goto nla_put_failure; 3316 3317 if (mask->pppoe.session_id) { 3318 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3319 key->pppoe.session_id)) 3320 goto nla_put_failure; 3321 } 3322 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3323 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3324 key->pppoe.ppp_proto)) 3325 goto nla_put_failure; 3326 } 3327 3328 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3329 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3330 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3331 sizeof(key->ipv4.src)) || 3332 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3333 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3334 sizeof(key->ipv4.dst)))) 3335 goto nla_put_failure; 3336 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3337 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3338 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3339 sizeof(key->ipv6.src)) || 3340 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3341 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3342 sizeof(key->ipv6.dst)))) 3343 goto nla_put_failure; 3344 3345 if (key->basic.ip_proto == IPPROTO_TCP && 3346 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3347 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3348 sizeof(key->tp.src)) || 3349 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3350 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3351 sizeof(key->tp.dst)) || 3352 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3353 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3354 sizeof(key->tcp.flags)))) 3355 goto nla_put_failure; 3356 else if (key->basic.ip_proto == IPPROTO_UDP && 3357 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3358 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3359 sizeof(key->tp.src)) || 3360 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3361 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3362 sizeof(key->tp.dst)))) 3363 goto nla_put_failure; 3364 else if (key->basic.ip_proto == IPPROTO_SCTP && 3365 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3366 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3367 sizeof(key->tp.src)) || 3368 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3369 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3370 sizeof(key->tp.dst)))) 3371 goto nla_put_failure; 3372 else if (key->basic.n_proto == htons(ETH_P_IP) && 3373 key->basic.ip_proto == IPPROTO_ICMP && 3374 (fl_dump_key_val(skb, &key->icmp.type, 3375 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3376 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3377 sizeof(key->icmp.type)) || 3378 fl_dump_key_val(skb, &key->icmp.code, 3379 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3380 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3381 sizeof(key->icmp.code)))) 3382 goto nla_put_failure; 3383 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3384 key->basic.ip_proto == IPPROTO_ICMPV6 && 3385 (fl_dump_key_val(skb, &key->icmp.type, 3386 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3387 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3388 sizeof(key->icmp.type)) || 3389 fl_dump_key_val(skb, &key->icmp.code, 3390 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3391 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3392 sizeof(key->icmp.code)))) 3393 goto nla_put_failure; 3394 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3395 key->basic.n_proto == htons(ETH_P_RARP)) && 3396 (fl_dump_key_val(skb, &key->arp.sip, 3397 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3398 TCA_FLOWER_KEY_ARP_SIP_MASK, 3399 sizeof(key->arp.sip)) || 3400 fl_dump_key_val(skb, &key->arp.tip, 3401 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3402 TCA_FLOWER_KEY_ARP_TIP_MASK, 3403 sizeof(key->arp.tip)) || 3404 fl_dump_key_val(skb, &key->arp.op, 3405 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3406 TCA_FLOWER_KEY_ARP_OP_MASK, 3407 sizeof(key->arp.op)) || 3408 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3409 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3410 sizeof(key->arp.sha)) || 3411 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3412 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3413 sizeof(key->arp.tha)))) 3414 goto nla_put_failure; 3415 else if (key->basic.ip_proto == IPPROTO_L2TP && 3416 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3417 TCA_FLOWER_KEY_L2TPV3_SID, 3418 &mask->l2tpv3.session_id, 3419 TCA_FLOWER_UNSPEC, 3420 sizeof(key->l2tpv3.session_id))) 3421 goto nla_put_failure; 3422 3423 if (key->ipsec.spi && 3424 fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, 3425 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 3426 sizeof(key->ipsec.spi))) 3427 goto nla_put_failure; 3428 3429 if ((key->basic.ip_proto == IPPROTO_TCP || 3430 key->basic.ip_proto == IPPROTO_UDP || 3431 key->basic.ip_proto == IPPROTO_SCTP) && 3432 fl_dump_key_port_range(skb, key, mask)) 3433 goto nla_put_failure; 3434 3435 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3436 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3437 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3438 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3439 sizeof(key->enc_ipv4.src)) || 3440 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3441 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3442 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3443 sizeof(key->enc_ipv4.dst)))) 3444 goto nla_put_failure; 3445 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3446 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3447 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3448 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3449 sizeof(key->enc_ipv6.src)) || 3450 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3451 TCA_FLOWER_KEY_ENC_IPV6_DST, 3452 &mask->enc_ipv6.dst, 3453 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3454 sizeof(key->enc_ipv6.dst)))) 3455 goto nla_put_failure; 3456 3457 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3458 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3459 sizeof(key->enc_key_id)) || 3460 fl_dump_key_val(skb, &key->enc_tp.src, 3461 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3462 &mask->enc_tp.src, 3463 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3464 sizeof(key->enc_tp.src)) || 3465 fl_dump_key_val(skb, &key->enc_tp.dst, 3466 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3467 &mask->enc_tp.dst, 3468 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3469 sizeof(key->enc_tp.dst)) || 3470 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3471 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3472 goto nla_put_failure; 3473 3474 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3475 goto nla_put_failure; 3476 3477 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3478 goto nla_put_failure; 3479 3480 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3481 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3482 sizeof(key->hash.hash))) 3483 goto nla_put_failure; 3484 3485 if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 3486 goto nla_put_failure; 3487 3488 return 0; 3489 3490 nla_put_failure: 3491 return -EMSGSIZE; 3492 } 3493 3494 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3495 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3496 { 3497 struct cls_fl_filter *f = fh; 3498 struct nlattr *nest; 3499 struct fl_flow_key *key, *mask; 3500 bool skip_hw; 3501 3502 if (!f) 3503 return skb->len; 3504 3505 t->tcm_handle = f->handle; 3506 3507 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3508 if (!nest) 3509 goto nla_put_failure; 3510 3511 spin_lock(&tp->lock); 3512 3513 if (f->res.classid && 3514 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3515 goto nla_put_failure_locked; 3516 3517 key = &f->key; 3518 mask = &f->mask->key; 3519 skip_hw = tc_skip_hw(f->flags); 3520 3521 if (fl_dump_key(skb, net, key, mask)) 3522 goto nla_put_failure_locked; 3523 3524 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3525 goto nla_put_failure_locked; 3526 3527 spin_unlock(&tp->lock); 3528 3529 if (!skip_hw) 3530 fl_hw_update_stats(tp, f, rtnl_held); 3531 3532 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3533 goto nla_put_failure; 3534 3535 if (tcf_exts_dump(skb, &f->exts)) 3536 goto nla_put_failure; 3537 3538 nla_nest_end(skb, nest); 3539 3540 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3541 goto nla_put_failure; 3542 3543 return skb->len; 3544 3545 nla_put_failure_locked: 3546 spin_unlock(&tp->lock); 3547 nla_put_failure: 3548 nla_nest_cancel(skb, nest); 3549 return -1; 3550 } 3551 3552 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3553 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3554 { 3555 struct cls_fl_filter *f = fh; 3556 struct nlattr *nest; 3557 bool skip_hw; 3558 3559 if (!f) 3560 return skb->len; 3561 3562 t->tcm_handle = f->handle; 3563 3564 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3565 if (!nest) 3566 goto nla_put_failure; 3567 3568 spin_lock(&tp->lock); 3569 3570 skip_hw = tc_skip_hw(f->flags); 3571 3572 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3573 goto nla_put_failure_locked; 3574 3575 spin_unlock(&tp->lock); 3576 3577 if (!skip_hw) 3578 fl_hw_update_stats(tp, f, rtnl_held); 3579 3580 if (tcf_exts_terse_dump(skb, &f->exts)) 3581 goto nla_put_failure; 3582 3583 nla_nest_end(skb, nest); 3584 3585 return skb->len; 3586 3587 nla_put_failure_locked: 3588 spin_unlock(&tp->lock); 3589 nla_put_failure: 3590 nla_nest_cancel(skb, nest); 3591 return -1; 3592 } 3593 3594 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3595 { 3596 struct fl_flow_tmplt *tmplt = tmplt_priv; 3597 struct fl_flow_key *key, *mask; 3598 struct nlattr *nest; 3599 3600 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3601 if (!nest) 3602 goto nla_put_failure; 3603 3604 key = &tmplt->dummy_key; 3605 mask = &tmplt->mask; 3606 3607 if (fl_dump_key(skb, net, key, mask)) 3608 goto nla_put_failure; 3609 3610 nla_nest_end(skb, nest); 3611 3612 return skb->len; 3613 3614 nla_put_failure: 3615 nla_nest_cancel(skb, nest); 3616 return -EMSGSIZE; 3617 } 3618 3619 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3620 unsigned long base) 3621 { 3622 struct cls_fl_filter *f = fh; 3623 3624 tc_cls_bind_class(classid, cl, q, &f->res, base); 3625 } 3626 3627 static bool fl_delete_empty(struct tcf_proto *tp) 3628 { 3629 struct cls_fl_head *head = fl_head_dereference(tp); 3630 3631 spin_lock(&tp->lock); 3632 tp->deleting = idr_is_empty(&head->handle_idr); 3633 spin_unlock(&tp->lock); 3634 3635 return tp->deleting; 3636 } 3637 3638 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3639 .kind = "flower", 3640 .classify = fl_classify, 3641 .init = fl_init, 3642 .destroy = fl_destroy, 3643 .get = fl_get, 3644 .put = fl_put, 3645 .change = fl_change, 3646 .delete = fl_delete, 3647 .delete_empty = fl_delete_empty, 3648 .walk = fl_walk, 3649 .reoffload = fl_reoffload, 3650 .hw_add = fl_hw_add, 3651 .hw_del = fl_hw_del, 3652 .dump = fl_dump, 3653 .terse_dump = fl_terse_dump, 3654 .bind_class = fl_bind_class, 3655 .tmplt_create = fl_tmplt_create, 3656 .tmplt_destroy = fl_tmplt_destroy, 3657 .tmplt_reoffload = fl_tmplt_reoffload, 3658 .tmplt_dump = fl_tmplt_dump, 3659 .get_exts = fl_get_exts, 3660 .owner = THIS_MODULE, 3661 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3662 }; 3663 3664 static int __init cls_fl_init(void) 3665 { 3666 return register_tcf_proto_ops(&cls_fl_ops); 3667 } 3668 3669 static void __exit cls_fl_exit(void) 3670 { 3671 unregister_tcf_proto_ops(&cls_fl_ops); 3672 } 3673 3674 module_init(cls_fl_init); 3675 module_exit(cls_fl_exit); 3676 3677 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3678 MODULE_DESCRIPTION("Flower classifier"); 3679 MODULE_LICENSE("GPL v2"); 3680