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