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/pfcp.h> 32 #include <net/tc_wrapper.h> 33 34 #include <net/dst.h> 35 #include <net/dst_metadata.h> 36 37 #include <uapi/linux/netfilter/nf_conntrack_common.h> 38 39 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 40 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 41 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 42 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 43 44 #define TCA_FLOWER_KEY_FLAGS_POLICY_MASK \ 45 (TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT | \ 46 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST) 47 48 #define TCA_FLOWER_KEY_ENC_FLAGS_POLICY_MASK \ 49 (TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM | \ 50 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT | \ 51 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM | \ 52 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT) 53 54 struct fl_flow_key { 55 struct flow_dissector_key_meta meta; 56 struct flow_dissector_key_control control; 57 struct flow_dissector_key_control enc_control; 58 struct flow_dissector_key_basic basic; 59 struct flow_dissector_key_eth_addrs eth; 60 struct flow_dissector_key_vlan vlan; 61 struct flow_dissector_key_vlan cvlan; 62 struct flow_dissector_key_ipv4_addrs ipv4; 63 struct flow_dissector_key_ipv6_addrs ipv6; 64 struct flow_dissector_key_ports tp; 65 struct flow_dissector_key_icmp icmp; 66 struct flow_dissector_key_arp arp; 67 struct flow_dissector_key_keyid enc_key_id; 68 struct flow_dissector_key_ipv4_addrs enc_ipv4; 69 struct flow_dissector_key_ipv6_addrs enc_ipv6; 70 struct flow_dissector_key_ports enc_tp; 71 struct flow_dissector_key_mpls mpls; 72 struct flow_dissector_key_tcp tcp; 73 struct flow_dissector_key_ip ip; 74 struct flow_dissector_key_ip enc_ip; 75 struct flow_dissector_key_enc_opts enc_opts; 76 struct flow_dissector_key_ports_range tp_range; 77 struct flow_dissector_key_ct ct; 78 struct flow_dissector_key_hash hash; 79 struct flow_dissector_key_num_of_vlans num_of_vlans; 80 struct flow_dissector_key_pppoe pppoe; 81 struct flow_dissector_key_l2tpv3 l2tpv3; 82 struct flow_dissector_key_ipsec ipsec; 83 struct flow_dissector_key_cfm cfm; 84 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 85 86 struct fl_flow_mask_range { 87 unsigned short int start; 88 unsigned short int end; 89 }; 90 91 struct fl_flow_mask { 92 struct fl_flow_key key; 93 struct fl_flow_mask_range range; 94 u32 flags; 95 struct rhash_head ht_node; 96 struct rhashtable ht; 97 struct rhashtable_params filter_ht_params; 98 struct flow_dissector dissector; 99 struct list_head filters; 100 struct rcu_work rwork; 101 struct list_head list; 102 refcount_t refcnt; 103 }; 104 105 struct fl_flow_tmplt { 106 struct fl_flow_key dummy_key; 107 struct fl_flow_key mask; 108 struct flow_dissector dissector; 109 struct tcf_chain *chain; 110 }; 111 112 struct cls_fl_head { 113 struct rhashtable ht; 114 spinlock_t masks_lock; /* Protect masks list */ 115 struct list_head masks; 116 struct list_head hw_filters; 117 struct rcu_work rwork; 118 struct idr handle_idr; 119 }; 120 121 struct cls_fl_filter { 122 struct fl_flow_mask *mask; 123 struct rhash_head ht_node; 124 struct fl_flow_key mkey; 125 struct tcf_exts exts; 126 struct tcf_result res; 127 struct fl_flow_key key; 128 struct list_head list; 129 struct list_head hw_list; 130 u32 handle; 131 u32 flags; 132 u32 in_hw_count; 133 u8 needs_tc_skb_ext:1; 134 struct rcu_work rwork; 135 struct net_device *hw_dev; 136 /* Flower classifier is unlocked, which means that its reference counter 137 * can be changed concurrently without any kind of external 138 * synchronization. Use atomic reference counter to be concurrency-safe. 139 */ 140 refcount_t refcnt; 141 bool deleted; 142 }; 143 144 static const struct rhashtable_params mask_ht_params = { 145 .key_offset = offsetof(struct fl_flow_mask, key), 146 .key_len = sizeof(struct fl_flow_key), 147 .head_offset = offsetof(struct fl_flow_mask, ht_node), 148 .automatic_shrinking = true, 149 }; 150 151 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 152 { 153 return mask->range.end - mask->range.start; 154 } 155 156 static void fl_mask_update_range(struct fl_flow_mask *mask) 157 { 158 const u8 *bytes = (const u8 *) &mask->key; 159 size_t size = sizeof(mask->key); 160 size_t i, first = 0, last; 161 162 for (i = 0; i < size; i++) { 163 if (bytes[i]) { 164 first = i; 165 break; 166 } 167 } 168 last = first; 169 for (i = size - 1; i != first; i--) { 170 if (bytes[i]) { 171 last = i; 172 break; 173 } 174 } 175 mask->range.start = rounddown(first, sizeof(long)); 176 mask->range.end = roundup(last + 1, sizeof(long)); 177 } 178 179 static void *fl_key_get_start(struct fl_flow_key *key, 180 const struct fl_flow_mask *mask) 181 { 182 return (u8 *) key + mask->range.start; 183 } 184 185 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 186 struct fl_flow_mask *mask) 187 { 188 const long *lkey = fl_key_get_start(key, mask); 189 const long *lmask = fl_key_get_start(&mask->key, mask); 190 long *lmkey = fl_key_get_start(mkey, mask); 191 int i; 192 193 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 194 *lmkey++ = *lkey++ & *lmask++; 195 } 196 197 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 198 struct fl_flow_mask *mask) 199 { 200 const long *lmask = fl_key_get_start(&mask->key, mask); 201 const long *ltmplt; 202 int i; 203 204 if (!tmplt) 205 return true; 206 ltmplt = fl_key_get_start(&tmplt->mask, mask); 207 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 208 if (~*ltmplt++ & *lmask++) 209 return false; 210 } 211 return true; 212 } 213 214 static void fl_clear_masked_range(struct fl_flow_key *key, 215 struct fl_flow_mask *mask) 216 { 217 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 218 } 219 220 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 221 struct fl_flow_key *key, 222 struct fl_flow_key *mkey) 223 { 224 u16 min_mask, max_mask, min_val, max_val; 225 226 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 227 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 228 min_val = ntohs(filter->key.tp_range.tp_min.dst); 229 max_val = ntohs(filter->key.tp_range.tp_max.dst); 230 231 if (min_mask && max_mask) { 232 if (ntohs(key->tp_range.tp.dst) < min_val || 233 ntohs(key->tp_range.tp.dst) > max_val) 234 return false; 235 236 /* skb does not have min and max values */ 237 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 238 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 239 } 240 return true; 241 } 242 243 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 244 struct fl_flow_key *key, 245 struct fl_flow_key *mkey) 246 { 247 u16 min_mask, max_mask, min_val, max_val; 248 249 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 250 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 251 min_val = ntohs(filter->key.tp_range.tp_min.src); 252 max_val = ntohs(filter->key.tp_range.tp_max.src); 253 254 if (min_mask && max_mask) { 255 if (ntohs(key->tp_range.tp.src) < min_val || 256 ntohs(key->tp_range.tp.src) > max_val) 257 return false; 258 259 /* skb does not have min and max values */ 260 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 261 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 262 } 263 return true; 264 } 265 266 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 267 struct fl_flow_key *mkey) 268 { 269 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 270 mask->filter_ht_params); 271 } 272 273 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 274 struct fl_flow_key *mkey, 275 struct fl_flow_key *key) 276 { 277 struct cls_fl_filter *filter, *f; 278 279 list_for_each_entry_rcu(filter, &mask->filters, list) { 280 if (!fl_range_port_dst_cmp(filter, key, mkey)) 281 continue; 282 283 if (!fl_range_port_src_cmp(filter, key, mkey)) 284 continue; 285 286 f = __fl_lookup(mask, mkey); 287 if (f) 288 return f; 289 } 290 return NULL; 291 } 292 293 static noinline_for_stack 294 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 295 { 296 struct fl_flow_key mkey; 297 298 fl_set_masked_key(&mkey, key, mask); 299 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 300 return fl_lookup_range(mask, &mkey, key); 301 302 return __fl_lookup(mask, &mkey); 303 } 304 305 static u16 fl_ct_info_to_flower_map[] = { 306 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 307 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 308 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 309 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 310 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 311 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 312 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 313 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 314 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 315 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 316 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 317 TCA_FLOWER_KEY_CT_FLAGS_NEW, 318 }; 319 320 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb, 321 const struct tcf_proto *tp, 322 struct tcf_result *res) 323 { 324 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 325 bool post_ct = qdisc_skb_cb(skb)->post_ct; 326 u16 zone = tc_skb_cb(skb)->zone; 327 struct fl_flow_key skb_key; 328 struct fl_flow_mask *mask; 329 struct cls_fl_filter *f; 330 331 list_for_each_entry_rcu(mask, &head->masks, list) { 332 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 333 fl_clear_masked_range(&skb_key, mask); 334 335 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 336 /* skb_flow_dissect() does not set n_proto in case an unknown 337 * protocol, so do it rather here. 338 */ 339 skb_key.basic.n_proto = skb_protocol(skb, false); 340 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 341 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 342 fl_ct_info_to_flower_map, 343 ARRAY_SIZE(fl_ct_info_to_flower_map), 344 post_ct, zone); 345 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 346 skb_flow_dissect(skb, &mask->dissector, &skb_key, 347 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); 348 349 f = fl_mask_lookup(mask, &skb_key); 350 if (f && !tc_skip_sw(f->flags)) { 351 *res = f->res; 352 return tcf_exts_exec(skb, &f->exts, res); 353 } 354 } 355 return -1; 356 } 357 358 static int fl_init(struct tcf_proto *tp) 359 { 360 struct cls_fl_head *head; 361 362 head = kzalloc_obj(*head); 363 if (!head) 364 return -ENOBUFS; 365 366 spin_lock_init(&head->masks_lock); 367 INIT_LIST_HEAD_RCU(&head->masks); 368 INIT_LIST_HEAD(&head->hw_filters); 369 rcu_assign_pointer(tp->root, head); 370 idr_init(&head->handle_idr); 371 372 return rhashtable_init(&head->ht, &mask_ht_params); 373 } 374 375 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 376 { 377 /* temporary masks don't have their filters list and ht initialized */ 378 if (mask_init_done) { 379 WARN_ON(!list_empty(&mask->filters)); 380 rhashtable_destroy(&mask->ht); 381 } 382 kfree(mask); 383 } 384 385 static void fl_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, true); 391 } 392 393 static void fl_uninit_mask_free_work(struct work_struct *work) 394 { 395 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 396 struct fl_flow_mask, rwork); 397 398 fl_mask_free(mask, false); 399 } 400 401 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 402 { 403 if (!refcount_dec_and_test(&mask->refcnt)) 404 return false; 405 406 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 407 408 spin_lock(&head->masks_lock); 409 list_del_rcu(&mask->list); 410 spin_unlock(&head->masks_lock); 411 412 tcf_queue_work(&mask->rwork, fl_mask_free_work); 413 414 return true; 415 } 416 417 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 418 { 419 /* Flower classifier only changes root pointer during init and destroy. 420 * Users must obtain reference to tcf_proto instance before calling its 421 * API, so tp->root pointer is protected from concurrent call to 422 * fl_destroy() by reference counting. 423 */ 424 return rcu_dereference_raw(tp->root); 425 } 426 427 static void __fl_destroy_filter(struct cls_fl_filter *f) 428 { 429 if (f->needs_tc_skb_ext) 430 tc_skb_ext_tc_disable(); 431 tcf_exts_destroy(&f->exts); 432 tcf_exts_put_net(&f->exts); 433 kfree(f); 434 } 435 436 static void fl_destroy_filter_work(struct work_struct *work) 437 { 438 struct cls_fl_filter *f = container_of(to_rcu_work(work), 439 struct cls_fl_filter, rwork); 440 441 __fl_destroy_filter(f); 442 } 443 444 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 445 bool rtnl_held, struct netlink_ext_ack *extack) 446 { 447 struct tcf_block *block = tp->chain->block; 448 struct flow_cls_offload cls_flower = {}; 449 450 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 451 cls_flower.command = FLOW_CLS_DESTROY; 452 cls_flower.cookie = (unsigned long) f; 453 454 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 455 &f->flags, &f->in_hw_count, rtnl_held); 456 457 } 458 459 static int fl_hw_replace_filter(struct tcf_proto *tp, 460 struct cls_fl_filter *f, bool rtnl_held, 461 struct netlink_ext_ack *extack) 462 { 463 struct tcf_block *block = tp->chain->block; 464 struct flow_cls_offload cls_flower = {}; 465 bool skip_sw = tc_skip_sw(f->flags); 466 int err = 0; 467 468 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 469 if (!cls_flower.rule) 470 return -ENOMEM; 471 472 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 473 cls_flower.command = FLOW_CLS_REPLACE; 474 cls_flower.cookie = (unsigned long) f; 475 cls_flower.rule->match.dissector = &f->mask->dissector; 476 cls_flower.rule->match.mask = &f->mask->key; 477 cls_flower.rule->match.key = &f->mkey; 478 cls_flower.classid = f->res.classid; 479 480 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 481 cls_flower.common.extack); 482 if (err) { 483 kfree(cls_flower.rule); 484 485 return skip_sw ? err : 0; 486 } 487 488 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 489 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 490 tc_cleanup_offload_action(&cls_flower.rule->action); 491 kfree(cls_flower.rule); 492 493 if (err) { 494 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 495 return err; 496 } 497 498 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 499 return -EINVAL; 500 501 return 0; 502 } 503 504 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 505 bool rtnl_held) 506 { 507 struct tcf_block *block = tp->chain->block; 508 struct flow_cls_offload cls_flower = {}; 509 510 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 511 cls_flower.command = FLOW_CLS_STATS; 512 cls_flower.cookie = (unsigned long) f; 513 cls_flower.classid = f->res.classid; 514 515 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 516 rtnl_held); 517 518 tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats); 519 } 520 521 static bool __fl_put(struct tcf_proto *tp, struct cls_fl_filter *f) 522 { 523 bool last = false; 524 525 if (!refcount_dec_and_test(&f->refcnt)) 526 return false; 527 528 if (f->mask) 529 last = fl_mask_put(fl_head_dereference(tp), f->mask); 530 531 if (tcf_exts_get_net(&f->exts)) 532 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 533 else 534 __fl_destroy_filter(f); 535 536 return last; 537 } 538 539 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 540 { 541 struct cls_fl_filter *f; 542 543 rcu_read_lock(); 544 f = idr_find(&head->handle_idr, handle); 545 if (f && !refcount_inc_not_zero(&f->refcnt)) 546 f = NULL; 547 rcu_read_unlock(); 548 549 return f; 550 } 551 552 static struct tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle) 553 { 554 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 555 struct cls_fl_filter *f; 556 557 f = idr_find(&head->handle_idr, handle); 558 return f ? &f->exts : NULL; 559 } 560 561 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 562 bool *last, bool rtnl_held, 563 struct netlink_ext_ack *extack) 564 { 565 struct cls_fl_head *head = fl_head_dereference(tp); 566 567 *last = false; 568 569 spin_lock(&tp->lock); 570 if (f->deleted) { 571 spin_unlock(&tp->lock); 572 return -ENOENT; 573 } 574 575 f->deleted = true; 576 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 577 f->mask->filter_ht_params); 578 idr_remove(&head->handle_idr, f->handle); 579 list_del_rcu(&f->list); 580 spin_unlock(&tp->lock); 581 582 if (!tc_skip_hw(f->flags)) 583 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 584 tcf_unbind_filter(tp, &f->res); 585 *last = __fl_put(tp, f); 586 587 return 0; 588 } 589 590 static void fl_destroy_sleepable(struct work_struct *work) 591 { 592 struct cls_fl_head *head = container_of(to_rcu_work(work), 593 struct cls_fl_head, 594 rwork); 595 596 rhashtable_destroy(&head->ht); 597 kfree(head); 598 module_put(THIS_MODULE); 599 } 600 601 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 602 struct netlink_ext_ack *extack) 603 { 604 struct cls_fl_head *head = fl_head_dereference(tp); 605 struct fl_flow_mask *mask, *next_mask; 606 struct cls_fl_filter *f, *next; 607 bool last; 608 609 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 610 list_for_each_entry_safe(f, next, &mask->filters, list) { 611 __fl_delete(tp, f, &last, rtnl_held, extack); 612 if (last) 613 break; 614 } 615 } 616 idr_destroy(&head->handle_idr); 617 618 __module_get(THIS_MODULE); 619 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 620 } 621 622 static void fl_put(struct tcf_proto *tp, void *arg) 623 { 624 struct cls_fl_filter *f = arg; 625 626 __fl_put(tp, f); 627 } 628 629 static void *fl_get(struct tcf_proto *tp, u32 handle) 630 { 631 struct cls_fl_head *head = fl_head_dereference(tp); 632 633 return __fl_get(head, handle); 634 } 635 636 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 637 [TCA_FLOWER_UNSPEC] = { .strict_start_type = 638 TCA_FLOWER_L2_MISS }, 639 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 640 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 641 .len = IFNAMSIZ }, 642 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 643 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 644 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 645 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 646 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 648 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 649 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 650 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 651 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 652 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 653 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 654 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 655 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 656 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 657 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 658 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 659 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 660 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 661 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 662 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 663 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 664 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 665 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 666 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 667 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 668 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 669 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 670 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 671 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 672 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 673 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 674 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 675 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 676 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 677 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 678 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 679 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 680 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 681 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 682 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 683 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 684 [TCA_FLOWER_KEY_FLAGS] = NLA_POLICY_MASK(NLA_BE32, 685 TCA_FLOWER_KEY_FLAGS_POLICY_MASK), 686 [TCA_FLOWER_KEY_FLAGS_MASK] = NLA_POLICY_MASK(NLA_BE32, 687 TCA_FLOWER_KEY_FLAGS_POLICY_MASK), 688 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 689 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 690 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 692 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 694 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 695 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 696 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 697 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 698 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 699 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 700 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 701 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 702 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 703 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 704 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 705 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 706 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 707 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 708 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 709 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 710 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 711 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 712 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 713 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 714 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 715 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 716 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 717 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 718 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 719 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 720 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 721 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 722 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 723 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 724 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 725 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 726 [TCA_FLOWER_KEY_CT_STATE] = 727 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 728 [TCA_FLOWER_KEY_CT_STATE_MASK] = 729 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 730 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 731 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 732 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 733 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 734 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 735 .len = 128 / BITS_PER_BYTE }, 736 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 737 .len = 128 / BITS_PER_BYTE }, 738 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 739 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 740 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 741 [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, 742 [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, 743 [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, 744 [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, 745 [TCA_FLOWER_KEY_SPI] = { .type = NLA_U32 }, 746 [TCA_FLOWER_KEY_SPI_MASK] = { .type = NLA_U32 }, 747 [TCA_FLOWER_L2_MISS] = NLA_POLICY_MAX(NLA_U8, 1), 748 [TCA_FLOWER_KEY_CFM] = { .type = NLA_NESTED }, 749 [TCA_FLOWER_KEY_ENC_FLAGS] = NLA_POLICY_MASK(NLA_BE32, 750 TCA_FLOWER_KEY_ENC_FLAGS_POLICY_MASK), 751 [TCA_FLOWER_KEY_ENC_FLAGS_MASK] = NLA_POLICY_MASK(NLA_BE32, 752 TCA_FLOWER_KEY_ENC_FLAGS_POLICY_MASK), 753 }; 754 755 static const struct nla_policy 756 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 757 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 758 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 759 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 760 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 761 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 762 [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .type = NLA_NESTED }, 763 [TCA_FLOWER_KEY_ENC_OPTS_PFCP] = { .type = NLA_NESTED }, 764 }; 765 766 static const struct nla_policy 767 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 768 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 769 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 770 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 771 .len = 127 }, 772 }; 773 774 static const struct nla_policy 775 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 776 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 777 }; 778 779 static const struct nla_policy 780 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 781 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 782 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 783 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 784 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 785 }; 786 787 static const struct nla_policy 788 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { 789 [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, 790 [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, 791 }; 792 793 static const struct nla_policy 794 pfcp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX + 1] = { 795 [TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE] = { .type = NLA_U8 }, 796 [TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID] = { .type = NLA_U64 }, 797 }; 798 799 static const struct nla_policy 800 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 801 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 802 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 803 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 804 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 805 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 806 }; 807 808 static const struct nla_policy 809 cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX + 1] = { 810 [TCA_FLOWER_KEY_CFM_MD_LEVEL] = NLA_POLICY_MAX(NLA_U8, 811 FLOW_DIS_CFM_MDL_MAX), 812 [TCA_FLOWER_KEY_CFM_OPCODE] = { .type = NLA_U8 }, 813 }; 814 815 static void fl_set_key_val(struct nlattr **tb, 816 void *val, int val_type, 817 void *mask, int mask_type, int len) 818 { 819 if (!tb[val_type]) 820 return; 821 nla_memcpy(val, tb[val_type], len); 822 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 823 memset(mask, 0xff, len); 824 else 825 nla_memcpy(mask, tb[mask_type], len); 826 } 827 828 static int fl_set_key_spi(struct nlattr **tb, struct fl_flow_key *key, 829 struct fl_flow_key *mask, 830 struct netlink_ext_ack *extack) 831 { 832 if (key->basic.ip_proto != IPPROTO_ESP && 833 key->basic.ip_proto != IPPROTO_AH) { 834 NL_SET_ERR_MSG(extack, 835 "Protocol must be either ESP or AH"); 836 return -EINVAL; 837 } 838 839 fl_set_key_val(tb, &key->ipsec.spi, 840 TCA_FLOWER_KEY_SPI, 841 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 842 sizeof(key->ipsec.spi)); 843 return 0; 844 } 845 846 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 847 struct fl_flow_key *mask, 848 struct netlink_ext_ack *extack) 849 { 850 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 851 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 852 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 853 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 854 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 855 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 856 fl_set_key_val(tb, &key->tp_range.tp_min.src, 857 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 858 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 859 fl_set_key_val(tb, &key->tp_range.tp_max.src, 860 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 861 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 862 863 if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) { 864 NL_SET_ERR_MSG(extack, 865 "Both min and max destination ports must be specified"); 866 return -EINVAL; 867 } 868 if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) { 869 NL_SET_ERR_MSG(extack, 870 "Both min and max source ports must be specified"); 871 return -EINVAL; 872 } 873 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 874 ntohs(key->tp_range.tp_max.dst) <= 875 ntohs(key->tp_range.tp_min.dst)) { 876 NL_SET_ERR_MSG_ATTR(extack, 877 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 878 "Invalid destination port range (min must be strictly smaller than max)"); 879 return -EINVAL; 880 } 881 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 882 ntohs(key->tp_range.tp_max.src) <= 883 ntohs(key->tp_range.tp_min.src)) { 884 NL_SET_ERR_MSG_ATTR(extack, 885 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 886 "Invalid source port range (min must be strictly smaller than max)"); 887 return -EINVAL; 888 } 889 890 return 0; 891 } 892 893 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 894 struct flow_dissector_key_mpls *key_val, 895 struct flow_dissector_key_mpls *key_mask, 896 struct netlink_ext_ack *extack) 897 { 898 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 899 struct flow_dissector_mpls_lse *lse_mask; 900 struct flow_dissector_mpls_lse *lse_val; 901 u8 lse_index; 902 u8 depth; 903 int err; 904 905 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 906 mpls_stack_entry_policy, extack); 907 if (err < 0) 908 return err; 909 910 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 911 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 912 return -EINVAL; 913 } 914 915 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 916 917 /* LSE depth starts at 1, for consistency with terminology used by 918 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 919 */ 920 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 921 NL_SET_ERR_MSG_ATTR(extack, 922 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 923 "Invalid MPLS depth"); 924 return -EINVAL; 925 } 926 lse_index = depth - 1; 927 928 dissector_set_mpls_lse(key_val, lse_index); 929 dissector_set_mpls_lse(key_mask, lse_index); 930 931 lse_val = &key_val->ls[lse_index]; 932 lse_mask = &key_mask->ls[lse_index]; 933 934 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 935 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 936 lse_mask->mpls_ttl = MPLS_TTL_MASK; 937 } 938 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 939 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 940 941 if (bos & ~MPLS_BOS_MASK) { 942 NL_SET_ERR_MSG_ATTR(extack, 943 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 944 "Bottom Of Stack (BOS) must be 0 or 1"); 945 return -EINVAL; 946 } 947 lse_val->mpls_bos = bos; 948 lse_mask->mpls_bos = MPLS_BOS_MASK; 949 } 950 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 951 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 952 953 if (tc & ~MPLS_TC_MASK) { 954 NL_SET_ERR_MSG_ATTR(extack, 955 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 956 "Traffic Class (TC) must be between 0 and 7"); 957 return -EINVAL; 958 } 959 lse_val->mpls_tc = tc; 960 lse_mask->mpls_tc = MPLS_TC_MASK; 961 } 962 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 963 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 964 965 if (label & ~MPLS_LABEL_MASK) { 966 NL_SET_ERR_MSG_ATTR(extack, 967 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 968 "Label must be between 0 and 1048575"); 969 return -EINVAL; 970 } 971 lse_val->mpls_label = label; 972 lse_mask->mpls_label = MPLS_LABEL_MASK; 973 } 974 975 return 0; 976 } 977 978 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 979 struct flow_dissector_key_mpls *key_val, 980 struct flow_dissector_key_mpls *key_mask, 981 struct netlink_ext_ack *extack) 982 { 983 struct nlattr *nla_lse; 984 int rem; 985 int err; 986 987 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 988 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 989 "NLA_F_NESTED is missing"); 990 return -EINVAL; 991 } 992 993 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 994 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 995 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 996 "Invalid MPLS option type"); 997 return -EINVAL; 998 } 999 1000 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 1001 if (err < 0) 1002 return err; 1003 } 1004 if (rem) { 1005 NL_SET_ERR_MSG(extack, 1006 "Bytes leftover after parsing MPLS options"); 1007 return -EINVAL; 1008 } 1009 1010 return 0; 1011 } 1012 1013 static int fl_set_key_mpls(struct nlattr **tb, 1014 struct flow_dissector_key_mpls *key_val, 1015 struct flow_dissector_key_mpls *key_mask, 1016 struct netlink_ext_ack *extack) 1017 { 1018 struct flow_dissector_mpls_lse *lse_mask; 1019 struct flow_dissector_mpls_lse *lse_val; 1020 1021 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 1022 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 1023 tb[TCA_FLOWER_KEY_MPLS_BOS] || 1024 tb[TCA_FLOWER_KEY_MPLS_TC] || 1025 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1026 NL_SET_ERR_MSG_ATTR(extack, 1027 tb[TCA_FLOWER_KEY_MPLS_OPTS], 1028 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 1029 return -EBADMSG; 1030 } 1031 1032 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 1033 key_val, key_mask, extack); 1034 } 1035 1036 lse_val = &key_val->ls[0]; 1037 lse_mask = &key_mask->ls[0]; 1038 1039 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 1040 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 1041 lse_mask->mpls_ttl = MPLS_TTL_MASK; 1042 dissector_set_mpls_lse(key_val, 0); 1043 dissector_set_mpls_lse(key_mask, 0); 1044 } 1045 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 1046 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 1047 1048 if (bos & ~MPLS_BOS_MASK) { 1049 NL_SET_ERR_MSG_ATTR(extack, 1050 tb[TCA_FLOWER_KEY_MPLS_BOS], 1051 "Bottom Of Stack (BOS) must be 0 or 1"); 1052 return -EINVAL; 1053 } 1054 lse_val->mpls_bos = bos; 1055 lse_mask->mpls_bos = MPLS_BOS_MASK; 1056 dissector_set_mpls_lse(key_val, 0); 1057 dissector_set_mpls_lse(key_mask, 0); 1058 } 1059 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 1060 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 1061 1062 if (tc & ~MPLS_TC_MASK) { 1063 NL_SET_ERR_MSG_ATTR(extack, 1064 tb[TCA_FLOWER_KEY_MPLS_TC], 1065 "Traffic Class (TC) must be between 0 and 7"); 1066 return -EINVAL; 1067 } 1068 lse_val->mpls_tc = tc; 1069 lse_mask->mpls_tc = MPLS_TC_MASK; 1070 dissector_set_mpls_lse(key_val, 0); 1071 dissector_set_mpls_lse(key_mask, 0); 1072 } 1073 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1074 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 1075 1076 if (label & ~MPLS_LABEL_MASK) { 1077 NL_SET_ERR_MSG_ATTR(extack, 1078 tb[TCA_FLOWER_KEY_MPLS_LABEL], 1079 "Label must be between 0 and 1048575"); 1080 return -EINVAL; 1081 } 1082 lse_val->mpls_label = label; 1083 lse_mask->mpls_label = MPLS_LABEL_MASK; 1084 dissector_set_mpls_lse(key_val, 0); 1085 dissector_set_mpls_lse(key_mask, 0); 1086 } 1087 return 0; 1088 } 1089 1090 static void fl_set_key_vlan(struct nlattr **tb, 1091 __be16 ethertype, 1092 int vlan_id_key, int vlan_prio_key, 1093 int vlan_next_eth_type_key, 1094 struct flow_dissector_key_vlan *key_val, 1095 struct flow_dissector_key_vlan *key_mask) 1096 { 1097 #define VLAN_PRIORITY_MASK 0x7 1098 1099 if (tb[vlan_id_key]) { 1100 key_val->vlan_id = 1101 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1102 key_mask->vlan_id = VLAN_VID_MASK; 1103 } 1104 if (tb[vlan_prio_key]) { 1105 key_val->vlan_priority = 1106 nla_get_u8(tb[vlan_prio_key]) & 1107 VLAN_PRIORITY_MASK; 1108 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1109 } 1110 if (ethertype) { 1111 key_val->vlan_tpid = ethertype; 1112 key_mask->vlan_tpid = cpu_to_be16(~0); 1113 } 1114 if (tb[vlan_next_eth_type_key]) { 1115 key_val->vlan_eth_type = 1116 nla_get_be16(tb[vlan_next_eth_type_key]); 1117 key_mask->vlan_eth_type = cpu_to_be16(~0); 1118 } 1119 } 1120 1121 static void fl_set_key_pppoe(struct nlattr **tb, 1122 struct flow_dissector_key_pppoe *key_val, 1123 struct flow_dissector_key_pppoe *key_mask, 1124 struct fl_flow_key *key, 1125 struct fl_flow_key *mask) 1126 { 1127 /* key_val::type must be set to ETH_P_PPP_SES 1128 * because ETH_P_PPP_SES was stored in basic.n_proto 1129 * which might get overwritten by ppp_proto 1130 * or might be set to 0, the role of key_val::type 1131 * is similar to vlan_key::tpid 1132 */ 1133 key_val->type = htons(ETH_P_PPP_SES); 1134 key_mask->type = cpu_to_be16(~0); 1135 1136 if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { 1137 key_val->session_id = 1138 nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); 1139 key_mask->session_id = cpu_to_be16(~0); 1140 } 1141 if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { 1142 key_val->ppp_proto = 1143 nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); 1144 key_mask->ppp_proto = cpu_to_be16(~0); 1145 1146 if (key_val->ppp_proto == htons(PPP_IP)) { 1147 key->basic.n_proto = htons(ETH_P_IP); 1148 mask->basic.n_proto = cpu_to_be16(~0); 1149 } else if (key_val->ppp_proto == htons(PPP_IPV6)) { 1150 key->basic.n_proto = htons(ETH_P_IPV6); 1151 mask->basic.n_proto = cpu_to_be16(~0); 1152 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { 1153 key->basic.n_proto = htons(ETH_P_MPLS_UC); 1154 mask->basic.n_proto = cpu_to_be16(~0); 1155 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { 1156 key->basic.n_proto = htons(ETH_P_MPLS_MC); 1157 mask->basic.n_proto = cpu_to_be16(~0); 1158 } 1159 } else { 1160 key->basic.n_proto = 0; 1161 mask->basic.n_proto = cpu_to_be16(0); 1162 } 1163 } 1164 1165 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1166 u32 *dissector_key, u32 *dissector_mask, 1167 u32 flower_flag_bit, u32 dissector_flag_bit) 1168 { 1169 if (flower_mask & flower_flag_bit) { 1170 *dissector_mask |= dissector_flag_bit; 1171 if (flower_key & flower_flag_bit) 1172 *dissector_key |= dissector_flag_bit; 1173 } 1174 } 1175 1176 static int fl_set_key_flags(struct nlattr *tca_opts, struct nlattr **tb, 1177 bool encap, u32 *flags_key, u32 *flags_mask, 1178 struct netlink_ext_ack *extack) 1179 { 1180 int fl_key, fl_mask; 1181 u32 key, mask; 1182 1183 if (encap) { 1184 fl_key = TCA_FLOWER_KEY_ENC_FLAGS; 1185 fl_mask = TCA_FLOWER_KEY_ENC_FLAGS_MASK; 1186 } else { 1187 fl_key = TCA_FLOWER_KEY_FLAGS; 1188 fl_mask = TCA_FLOWER_KEY_FLAGS_MASK; 1189 } 1190 1191 /* mask is mandatory for flags */ 1192 if (NL_REQ_ATTR_CHECK(extack, tca_opts, tb, fl_mask)) { 1193 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1194 return -EINVAL; 1195 } 1196 1197 key = be32_to_cpu(nla_get_be32(tb[fl_key])); 1198 mask = be32_to_cpu(nla_get_be32(tb[fl_mask])); 1199 1200 *flags_key = 0; 1201 *flags_mask = 0; 1202 1203 fl_set_key_flag(key, mask, flags_key, flags_mask, 1204 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1205 fl_set_key_flag(key, mask, flags_key, flags_mask, 1206 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1207 FLOW_DIS_FIRST_FRAG); 1208 1209 fl_set_key_flag(key, mask, flags_key, flags_mask, 1210 TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM, 1211 FLOW_DIS_F_TUNNEL_CSUM); 1212 1213 fl_set_key_flag(key, mask, flags_key, flags_mask, 1214 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT, 1215 FLOW_DIS_F_TUNNEL_DONT_FRAGMENT); 1216 1217 fl_set_key_flag(key, mask, flags_key, flags_mask, 1218 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM, FLOW_DIS_F_TUNNEL_OAM); 1219 1220 fl_set_key_flag(key, mask, flags_key, flags_mask, 1221 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT, 1222 FLOW_DIS_F_TUNNEL_CRIT_OPT); 1223 1224 return 0; 1225 } 1226 1227 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1228 struct flow_dissector_key_ip *key, 1229 struct flow_dissector_key_ip *mask) 1230 { 1231 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1232 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1233 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1234 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1235 1236 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1237 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1238 } 1239 1240 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1241 int depth, int option_len, 1242 struct netlink_ext_ack *extack) 1243 { 1244 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1245 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1246 struct geneve_opt *opt; 1247 int err, data_len = 0; 1248 1249 if (option_len > sizeof(struct geneve_opt)) 1250 data_len = option_len - sizeof(struct geneve_opt); 1251 1252 if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) 1253 return -ERANGE; 1254 1255 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1256 memset(opt, 0xff, option_len); 1257 opt->length = data_len / 4; 1258 opt->r1 = 0; 1259 opt->r2 = 0; 1260 opt->r3 = 0; 1261 1262 /* If no mask has been prodived we assume an exact match. */ 1263 if (!depth) 1264 return sizeof(struct geneve_opt) + data_len; 1265 1266 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1267 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1268 return -EINVAL; 1269 } 1270 1271 err = nla_parse_nested_deprecated(tb, 1272 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1273 nla, geneve_opt_policy, extack); 1274 if (err < 0) 1275 return err; 1276 1277 /* We are not allowed to omit any of CLASS, TYPE or DATA 1278 * fields from the key. 1279 */ 1280 if (!option_len && 1281 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1282 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1283 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1284 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1285 return -EINVAL; 1286 } 1287 1288 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1289 * for the mask. 1290 */ 1291 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1292 int new_len = key->enc_opts.len; 1293 1294 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1295 data_len = nla_len(data); 1296 if (data_len < 4) { 1297 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1298 return -ERANGE; 1299 } 1300 if (data_len % 4) { 1301 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1302 return -ERANGE; 1303 } 1304 1305 new_len += sizeof(struct geneve_opt) + data_len; 1306 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1307 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1308 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1309 return -ERANGE; 1310 } 1311 opt->length = data_len / 4; 1312 memcpy(opt->opt_data, nla_data(data), data_len); 1313 } 1314 1315 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1316 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1317 opt->opt_class = nla_get_be16(class); 1318 } 1319 1320 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1321 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1322 opt->type = nla_get_u8(type); 1323 } 1324 1325 return sizeof(struct geneve_opt) + data_len; 1326 } 1327 1328 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1329 int depth, int option_len, 1330 struct netlink_ext_ack *extack) 1331 { 1332 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1333 struct vxlan_metadata *md; 1334 int err; 1335 1336 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1337 memset(md, 0xff, sizeof(*md)); 1338 1339 if (!depth) 1340 return sizeof(*md); 1341 1342 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1343 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1344 return -EINVAL; 1345 } 1346 1347 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1348 vxlan_opt_policy, extack); 1349 if (err < 0) 1350 return err; 1351 1352 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1353 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1354 return -EINVAL; 1355 } 1356 1357 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1358 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1359 md->gbp &= VXLAN_GBP_MASK; 1360 } 1361 1362 return sizeof(*md); 1363 } 1364 1365 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1366 int depth, int option_len, 1367 struct netlink_ext_ack *extack, u8 *key_ver) 1368 { 1369 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1370 struct erspan_metadata *md; 1371 int err; 1372 1373 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1374 1375 if (!depth) { 1376 /* No mask attribute supplied: exact-match every field the 1377 * key set, keyed off the key's own version so the v2 dir/hwid 1378 * bytes are masked without touching the overlapping 1379 * timestamp/sgt bytes of the union (see 292207809486). 1380 */ 1381 md->version = *key_ver; 1382 if (md->version == 1) { 1383 memset(&md->u.index, 0xff, sizeof(md->u.index)); 1384 } else if (md->version == 2) { 1385 md->u.md2.dir = 1; 1386 set_hwid(&md->u.md2, 0xff); 1387 } 1388 return sizeof(*md); 1389 } 1390 1391 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1392 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1393 return -EINVAL; 1394 } 1395 1396 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1397 erspan_opt_policy, extack); 1398 if (err < 0) 1399 return err; 1400 1401 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1402 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1403 return -EINVAL; 1404 } 1405 1406 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1407 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1408 else 1409 md->version = 1; 1410 1411 /* The key and mask must describe the same union layout: the 1412 * per-version default below only exact-matches the fields of its own 1413 * version, so a mask version that differs from the key's would 1414 * silently wildcard the key's matched fields. A mask without a 1415 * version keeps the historical v1 default. 1416 */ 1417 if (option_len && md->version != *key_ver) { 1418 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver mismatch"); 1419 return -EINVAL; 1420 } 1421 1422 if (!option_len) 1423 *key_ver = md->version; 1424 1425 if (md->version == 1) { 1426 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1427 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1428 return -EINVAL; 1429 } 1430 memset(&md->u.index, 0xff, sizeof(md->u.index)); 1431 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1432 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1433 md->u.index = nla_get_be32(nla); 1434 } 1435 } else if (md->version == 2) { 1436 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1437 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1438 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1439 return -EINVAL; 1440 } 1441 md->u.md2.dir = 1; 1442 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1443 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1444 md->u.md2.dir = nla_get_u8(nla); 1445 } 1446 set_hwid(&md->u.md2, 0xff); 1447 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1448 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1449 set_hwid(&md->u.md2, nla_get_u8(nla)); 1450 } 1451 } else { 1452 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1453 return -EINVAL; 1454 } 1455 1456 return sizeof(*md); 1457 } 1458 1459 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1460 int depth, int option_len, 1461 struct netlink_ext_ack *extack) 1462 { 1463 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1464 struct gtp_pdu_session_info *sinfo; 1465 u8 len = key->enc_opts.len; 1466 int err; 1467 1468 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1469 memset(sinfo, 0xff, option_len); 1470 1471 if (!depth) 1472 return sizeof(*sinfo); 1473 1474 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1475 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1476 return -EINVAL; 1477 } 1478 1479 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1480 gtp_opt_policy, extack); 1481 if (err < 0) 1482 return err; 1483 1484 if (!option_len && 1485 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1486 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1487 NL_SET_ERR_MSG_MOD(extack, 1488 "Missing tunnel key gtp option pdu type or qfi"); 1489 return -EINVAL; 1490 } 1491 1492 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1493 sinfo->pdu_type = 1494 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1495 1496 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1497 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1498 1499 return sizeof(*sinfo); 1500 } 1501 1502 static int fl_set_pfcp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1503 int depth, int option_len, 1504 struct netlink_ext_ack *extack) 1505 { 1506 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX + 1]; 1507 struct pfcp_metadata *md; 1508 int err; 1509 1510 md = (struct pfcp_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1511 memset(md, 0xff, sizeof(*md)); 1512 1513 if (!depth) 1514 return sizeof(*md); 1515 1516 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_PFCP) { 1517 NL_SET_ERR_MSG_MOD(extack, "Non-pfcp option type for mask"); 1518 return -EINVAL; 1519 } 1520 1521 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX, nla, 1522 pfcp_opt_policy, extack); 1523 if (err < 0) 1524 return err; 1525 1526 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]) { 1527 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel key pfcp option type"); 1528 return -EINVAL; 1529 } 1530 1531 if (tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]) 1532 md->type = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]); 1533 1534 if (tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]) 1535 md->seid = nla_get_be64(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]); 1536 1537 return sizeof(*md); 1538 } 1539 1540 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1541 struct fl_flow_key *mask, 1542 struct netlink_ext_ack *extack) 1543 { 1544 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1545 int err, option_len, key_depth, msk_depth = 0; 1546 u8 key_ver = 1; 1547 1548 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1549 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1550 enc_opts_policy, extack); 1551 if (err) 1552 return err; 1553 1554 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1555 1556 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1557 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1558 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1559 enc_opts_policy, extack); 1560 if (err) 1561 return err; 1562 1563 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1564 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1565 if (!nla_ok(nla_opt_msk, msk_depth)) { 1566 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1567 return -EINVAL; 1568 } 1569 } 1570 1571 nla_for_each_attr(nla_opt_key, nla_enc_key, 1572 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1573 switch (nla_type(nla_opt_key)) { 1574 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1575 if (key->enc_opts.dst_opt_type && 1576 key->enc_opts.dst_opt_type != 1577 IP_TUNNEL_GENEVE_OPT_BIT) { 1578 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1579 return -EINVAL; 1580 } 1581 option_len = 0; 1582 key->enc_opts.dst_opt_type = IP_TUNNEL_GENEVE_OPT_BIT; 1583 option_len = fl_set_geneve_opt(nla_opt_key, key, 1584 key_depth, option_len, 1585 extack); 1586 if (option_len < 0) 1587 return option_len; 1588 1589 key->enc_opts.len += option_len; 1590 /* At the same time we need to parse through the mask 1591 * in order to verify exact and mask attribute lengths. 1592 */ 1593 mask->enc_opts.dst_opt_type = IP_TUNNEL_GENEVE_OPT_BIT; 1594 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1595 msk_depth, option_len, 1596 extack); 1597 if (option_len < 0) 1598 return option_len; 1599 1600 mask->enc_opts.len += option_len; 1601 if (key->enc_opts.len != mask->enc_opts.len) { 1602 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1603 return -EINVAL; 1604 } 1605 break; 1606 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1607 if (key->enc_opts.dst_opt_type) { 1608 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1609 return -EINVAL; 1610 } 1611 option_len = 0; 1612 key->enc_opts.dst_opt_type = IP_TUNNEL_VXLAN_OPT_BIT; 1613 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1614 key_depth, option_len, 1615 extack); 1616 if (option_len < 0) 1617 return option_len; 1618 1619 key->enc_opts.len += option_len; 1620 /* At the same time we need to parse through the mask 1621 * in order to verify exact and mask attribute lengths. 1622 */ 1623 mask->enc_opts.dst_opt_type = IP_TUNNEL_VXLAN_OPT_BIT; 1624 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1625 msk_depth, option_len, 1626 extack); 1627 if (option_len < 0) 1628 return option_len; 1629 1630 mask->enc_opts.len += option_len; 1631 if (key->enc_opts.len != mask->enc_opts.len) { 1632 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1633 return -EINVAL; 1634 } 1635 break; 1636 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1637 if (key->enc_opts.dst_opt_type) { 1638 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1639 return -EINVAL; 1640 } 1641 option_len = 0; 1642 key->enc_opts.dst_opt_type = IP_TUNNEL_ERSPAN_OPT_BIT; 1643 option_len = fl_set_erspan_opt(nla_opt_key, key, 1644 key_depth, option_len, 1645 extack, &key_ver); 1646 if (option_len < 0) 1647 return option_len; 1648 1649 key->enc_opts.len += option_len; 1650 /* At the same time we need to parse through the mask 1651 * in order to verify exact and mask attribute lengths. 1652 */ 1653 mask->enc_opts.dst_opt_type = IP_TUNNEL_ERSPAN_OPT_BIT; 1654 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1655 msk_depth, option_len, 1656 extack, &key_ver); 1657 if (option_len < 0) 1658 return option_len; 1659 1660 mask->enc_opts.len += option_len; 1661 if (key->enc_opts.len != mask->enc_opts.len) { 1662 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1663 return -EINVAL; 1664 } 1665 break; 1666 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1667 if (key->enc_opts.dst_opt_type) { 1668 NL_SET_ERR_MSG_MOD(extack, 1669 "Duplicate type for gtp options"); 1670 return -EINVAL; 1671 } 1672 option_len = 0; 1673 key->enc_opts.dst_opt_type = IP_TUNNEL_GTP_OPT_BIT; 1674 option_len = fl_set_gtp_opt(nla_opt_key, key, 1675 key_depth, option_len, 1676 extack); 1677 if (option_len < 0) 1678 return option_len; 1679 1680 key->enc_opts.len += option_len; 1681 /* At the same time we need to parse through the mask 1682 * in order to verify exact and mask attribute lengths. 1683 */ 1684 mask->enc_opts.dst_opt_type = IP_TUNNEL_GTP_OPT_BIT; 1685 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1686 msk_depth, option_len, 1687 extack); 1688 if (option_len < 0) 1689 return option_len; 1690 1691 mask->enc_opts.len += option_len; 1692 if (key->enc_opts.len != mask->enc_opts.len) { 1693 NL_SET_ERR_MSG_MOD(extack, 1694 "Key and mask miss aligned"); 1695 return -EINVAL; 1696 } 1697 break; 1698 case TCA_FLOWER_KEY_ENC_OPTS_PFCP: 1699 if (key->enc_opts.dst_opt_type) { 1700 NL_SET_ERR_MSG_MOD(extack, "Duplicate type for pfcp options"); 1701 return -EINVAL; 1702 } 1703 option_len = 0; 1704 key->enc_opts.dst_opt_type = IP_TUNNEL_PFCP_OPT_BIT; 1705 option_len = fl_set_pfcp_opt(nla_opt_key, key, 1706 key_depth, option_len, 1707 extack); 1708 if (option_len < 0) 1709 return option_len; 1710 1711 key->enc_opts.len += option_len; 1712 /* At the same time we need to parse through the mask 1713 * in order to verify exact and mask attribute lengths. 1714 */ 1715 mask->enc_opts.dst_opt_type = IP_TUNNEL_PFCP_OPT_BIT; 1716 option_len = fl_set_pfcp_opt(nla_opt_msk, mask, 1717 msk_depth, option_len, 1718 extack); 1719 if (option_len < 0) 1720 return option_len; 1721 1722 mask->enc_opts.len += option_len; 1723 if (key->enc_opts.len != mask->enc_opts.len) { 1724 NL_SET_ERR_MSG_MOD(extack, "Key and mask miss aligned"); 1725 return -EINVAL; 1726 } 1727 break; 1728 default: 1729 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1730 return -EINVAL; 1731 } 1732 1733 if (!msk_depth) 1734 continue; 1735 1736 if (!nla_ok(nla_opt_msk, msk_depth)) { 1737 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1738 return -EINVAL; 1739 } 1740 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1741 1742 if (msk_depth && !nla_ok(nla_opt_msk, msk_depth)) { 1743 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1744 return -EINVAL; 1745 } 1746 } 1747 1748 return 0; 1749 } 1750 1751 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1752 struct netlink_ext_ack *extack) 1753 { 1754 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1755 NL_SET_ERR_MSG_ATTR(extack, tb, 1756 "no trk, so no other flag can be set"); 1757 return -EINVAL; 1758 } 1759 1760 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1761 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1762 NL_SET_ERR_MSG_ATTR(extack, tb, 1763 "new and est are mutually exclusive"); 1764 return -EINVAL; 1765 } 1766 1767 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1768 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1769 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1770 NL_SET_ERR_MSG_ATTR(extack, tb, 1771 "when inv is set, only trk may be set"); 1772 return -EINVAL; 1773 } 1774 1775 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1776 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1777 NL_SET_ERR_MSG_ATTR(extack, tb, 1778 "new and rpl are mutually exclusive"); 1779 return -EINVAL; 1780 } 1781 1782 return 0; 1783 } 1784 1785 static int fl_set_key_ct(struct nlattr **tb, 1786 struct flow_dissector_key_ct *key, 1787 struct flow_dissector_key_ct *mask, 1788 struct netlink_ext_ack *extack) 1789 { 1790 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1791 int err; 1792 1793 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1794 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1795 return -EOPNOTSUPP; 1796 } 1797 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1798 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1799 sizeof(key->ct_state)); 1800 1801 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1802 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1803 extack); 1804 if (err) 1805 return err; 1806 1807 } 1808 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1809 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1810 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1811 return -EOPNOTSUPP; 1812 } 1813 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1814 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1815 sizeof(key->ct_zone)); 1816 } 1817 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1818 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1819 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1820 return -EOPNOTSUPP; 1821 } 1822 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1823 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1824 sizeof(key->ct_mark)); 1825 } 1826 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1827 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1828 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1829 return -EOPNOTSUPP; 1830 } 1831 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1832 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1833 sizeof(key->ct_labels)); 1834 } 1835 1836 return 0; 1837 } 1838 1839 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1840 struct fl_flow_key *key, struct fl_flow_key *mask, 1841 int vthresh) 1842 { 1843 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1844 1845 if (!tb) { 1846 *ethertype = 0; 1847 return good_num_of_vlans; 1848 } 1849 1850 *ethertype = nla_get_be16(tb); 1851 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1852 return true; 1853 1854 key->basic.n_proto = *ethertype; 1855 mask->basic.n_proto = cpu_to_be16(~0); 1856 return false; 1857 } 1858 1859 static void fl_set_key_cfm_md_level(struct nlattr **tb, 1860 struct fl_flow_key *key, 1861 struct fl_flow_key *mask, 1862 struct netlink_ext_ack *extack) 1863 { 1864 u8 level; 1865 1866 if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) 1867 return; 1868 1869 level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); 1870 key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); 1871 mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; 1872 } 1873 1874 static void fl_set_key_cfm_opcode(struct nlattr **tb, 1875 struct fl_flow_key *key, 1876 struct fl_flow_key *mask, 1877 struct netlink_ext_ack *extack) 1878 { 1879 fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, 1880 &mask->cfm.opcode, TCA_FLOWER_UNSPEC, 1881 sizeof(key->cfm.opcode)); 1882 } 1883 1884 static int fl_set_key_cfm(struct nlattr **tb, 1885 struct fl_flow_key *key, 1886 struct fl_flow_key *mask, 1887 struct netlink_ext_ack *extack) 1888 { 1889 struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1]; 1890 int err; 1891 1892 if (!tb[TCA_FLOWER_KEY_CFM]) 1893 return 0; 1894 1895 err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, 1896 tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); 1897 if (err < 0) 1898 return err; 1899 1900 fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); 1901 fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 1902 1903 return 0; 1904 } 1905 1906 static int fl_set_key(struct net *net, struct nlattr *tca_opts, 1907 struct nlattr **tb, struct fl_flow_key *key, 1908 struct fl_flow_key *mask, struct netlink_ext_ack *extack) 1909 { 1910 __be16 ethertype; 1911 int ret = 0; 1912 1913 if (tb[TCA_FLOWER_INDEV]) { 1914 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1915 if (err < 0) 1916 return err; 1917 key->meta.ingress_ifindex = err; 1918 mask->meta.ingress_ifindex = 0xffffffff; 1919 } 1920 1921 fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, 1922 &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, 1923 sizeof(key->meta.l2_miss)); 1924 1925 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1926 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1927 sizeof(key->eth.dst)); 1928 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1929 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1930 sizeof(key->eth.src)); 1931 fl_set_key_val(tb, &key->num_of_vlans, 1932 TCA_FLOWER_KEY_NUM_OF_VLANS, 1933 &mask->num_of_vlans, 1934 TCA_FLOWER_UNSPEC, 1935 sizeof(key->num_of_vlans)); 1936 1937 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1938 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1939 TCA_FLOWER_KEY_VLAN_PRIO, 1940 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1941 &key->vlan, &mask->vlan); 1942 1943 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1944 ðertype, key, mask, 1)) { 1945 fl_set_key_vlan(tb, ethertype, 1946 TCA_FLOWER_KEY_CVLAN_ID, 1947 TCA_FLOWER_KEY_CVLAN_PRIO, 1948 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1949 &key->cvlan, &mask->cvlan); 1950 fl_set_key_val(tb, &key->basic.n_proto, 1951 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1952 &mask->basic.n_proto, 1953 TCA_FLOWER_UNSPEC, 1954 sizeof(key->basic.n_proto)); 1955 } 1956 } 1957 1958 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1959 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1960 1961 if (key->basic.n_proto == htons(ETH_P_IP) || 1962 key->basic.n_proto == htons(ETH_P_IPV6)) { 1963 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1964 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1965 sizeof(key->basic.ip_proto)); 1966 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1967 } 1968 1969 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1970 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1971 mask->control.addr_type = ~0; 1972 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1973 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1974 sizeof(key->ipv4.src)); 1975 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1976 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1977 sizeof(key->ipv4.dst)); 1978 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1979 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1980 mask->control.addr_type = ~0; 1981 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1982 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1983 sizeof(key->ipv6.src)); 1984 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1985 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1986 sizeof(key->ipv6.dst)); 1987 } 1988 1989 if (key->basic.ip_proto == IPPROTO_TCP) { 1990 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1991 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1992 sizeof(key->tp.src)); 1993 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1994 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1995 sizeof(key->tp.dst)); 1996 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1997 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1998 sizeof(key->tcp.flags)); 1999 } else if (key->basic.ip_proto == IPPROTO_UDP) { 2000 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2001 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2002 sizeof(key->tp.src)); 2003 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2004 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2005 sizeof(key->tp.dst)); 2006 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 2007 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2008 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2009 sizeof(key->tp.src)); 2010 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2011 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2012 sizeof(key->tp.dst)); 2013 } else if (key->basic.n_proto == htons(ETH_P_IP) && 2014 key->basic.ip_proto == IPPROTO_ICMP) { 2015 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 2016 &mask->icmp.type, 2017 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2018 sizeof(key->icmp.type)); 2019 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 2020 &mask->icmp.code, 2021 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2022 sizeof(key->icmp.code)); 2023 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2024 key->basic.ip_proto == IPPROTO_ICMPV6) { 2025 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 2026 &mask->icmp.type, 2027 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2028 sizeof(key->icmp.type)); 2029 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 2030 &mask->icmp.code, 2031 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2032 sizeof(key->icmp.code)); 2033 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 2034 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 2035 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 2036 if (ret) 2037 return ret; 2038 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 2039 key->basic.n_proto == htons(ETH_P_RARP)) { 2040 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 2041 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 2042 sizeof(key->arp.sip)); 2043 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 2044 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 2045 sizeof(key->arp.tip)); 2046 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 2047 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 2048 sizeof(key->arp.op)); 2049 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2050 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2051 sizeof(key->arp.sha)); 2052 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2053 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2054 sizeof(key->arp.tha)); 2055 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 2056 fl_set_key_val(tb, &key->l2tpv3.session_id, 2057 TCA_FLOWER_KEY_L2TPV3_SID, 2058 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 2059 sizeof(key->l2tpv3.session_id)); 2060 } else if (key->basic.n_proto == htons(ETH_P_CFM)) { 2061 ret = fl_set_key_cfm(tb, key, mask, extack); 2062 if (ret) 2063 return ret; 2064 } 2065 2066 if (key->basic.ip_proto == IPPROTO_TCP || 2067 key->basic.ip_proto == IPPROTO_UDP || 2068 key->basic.ip_proto == IPPROTO_SCTP) { 2069 ret = fl_set_key_port_range(tb, key, mask, extack); 2070 if (ret) 2071 return ret; 2072 } 2073 2074 if (tb[TCA_FLOWER_KEY_SPI]) { 2075 ret = fl_set_key_spi(tb, key, mask, extack); 2076 if (ret) 2077 return ret; 2078 } 2079 2080 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 2081 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 2082 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 2083 mask->enc_control.addr_type = ~0; 2084 fl_set_key_val(tb, &key->enc_ipv4.src, 2085 TCA_FLOWER_KEY_ENC_IPV4_SRC, 2086 &mask->enc_ipv4.src, 2087 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2088 sizeof(key->enc_ipv4.src)); 2089 fl_set_key_val(tb, &key->enc_ipv4.dst, 2090 TCA_FLOWER_KEY_ENC_IPV4_DST, 2091 &mask->enc_ipv4.dst, 2092 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2093 sizeof(key->enc_ipv4.dst)); 2094 } 2095 2096 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 2097 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 2098 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 2099 mask->enc_control.addr_type = ~0; 2100 fl_set_key_val(tb, &key->enc_ipv6.src, 2101 TCA_FLOWER_KEY_ENC_IPV6_SRC, 2102 &mask->enc_ipv6.src, 2103 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2104 sizeof(key->enc_ipv6.src)); 2105 fl_set_key_val(tb, &key->enc_ipv6.dst, 2106 TCA_FLOWER_KEY_ENC_IPV6_DST, 2107 &mask->enc_ipv6.dst, 2108 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2109 sizeof(key->enc_ipv6.dst)); 2110 } 2111 2112 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 2113 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 2114 sizeof(key->enc_key_id.keyid)); 2115 2116 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2117 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2118 sizeof(key->enc_tp.src)); 2119 2120 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2121 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2122 sizeof(key->enc_tp.dst)); 2123 2124 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 2125 2126 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 2127 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 2128 sizeof(key->hash.hash)); 2129 2130 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 2131 ret = fl_set_enc_opt(tb, key, mask, extack); 2132 if (ret) 2133 return ret; 2134 } 2135 2136 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 2137 if (ret) 2138 return ret; 2139 2140 if (tb[TCA_FLOWER_KEY_FLAGS]) { 2141 ret = fl_set_key_flags(tca_opts, tb, false, 2142 &key->control.flags, 2143 &mask->control.flags, extack); 2144 if (ret) 2145 return ret; 2146 } 2147 2148 if (tb[TCA_FLOWER_KEY_ENC_FLAGS]) 2149 ret = fl_set_key_flags(tca_opts, tb, true, 2150 &key->enc_control.flags, 2151 &mask->enc_control.flags, extack); 2152 2153 return ret; 2154 } 2155 2156 static void fl_mask_copy(struct fl_flow_mask *dst, 2157 struct fl_flow_mask *src) 2158 { 2159 const void *psrc = fl_key_get_start(&src->key, src); 2160 void *pdst = fl_key_get_start(&dst->key, src); 2161 2162 memcpy(pdst, psrc, fl_mask_range(src)); 2163 dst->range = src->range; 2164 } 2165 2166 static const struct rhashtable_params fl_ht_params = { 2167 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 2168 .head_offset = offsetof(struct cls_fl_filter, ht_node), 2169 .automatic_shrinking = true, 2170 }; 2171 2172 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 2173 { 2174 mask->filter_ht_params = fl_ht_params; 2175 mask->filter_ht_params.key_len = fl_mask_range(mask); 2176 mask->filter_ht_params.key_offset += mask->range.start; 2177 2178 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 2179 } 2180 2181 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 2182 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 2183 2184 #define FL_KEY_IS_MASKED(mask, member) \ 2185 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 2186 0, FL_KEY_MEMBER_SIZE(member)) \ 2187 2188 #define FL_KEY_SET(keys, cnt, id, member) \ 2189 do { \ 2190 keys[cnt].key_id = id; \ 2191 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 2192 cnt++; \ 2193 } while(0); 2194 2195 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 2196 do { \ 2197 if (FL_KEY_IS_MASKED(mask, member)) \ 2198 FL_KEY_SET(keys, cnt, id, member); \ 2199 } while(0); 2200 2201 static void fl_init_dissector(struct flow_dissector *dissector, 2202 struct fl_flow_key *mask) 2203 { 2204 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 2205 size_t cnt = 0; 2206 2207 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2208 FLOW_DISSECTOR_KEY_META, meta); 2209 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 2210 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 2211 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2212 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 2213 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2214 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 2215 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2216 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 2217 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2218 FLOW_DISSECTOR_KEY_PORTS, tp); 2219 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2220 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 2221 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2222 FLOW_DISSECTOR_KEY_IP, ip); 2223 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2224 FLOW_DISSECTOR_KEY_TCP, tcp); 2225 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2226 FLOW_DISSECTOR_KEY_ICMP, icmp); 2227 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2228 FLOW_DISSECTOR_KEY_ARP, arp); 2229 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2230 FLOW_DISSECTOR_KEY_MPLS, mpls); 2231 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2232 FLOW_DISSECTOR_KEY_VLAN, vlan); 2233 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2234 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 2235 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2236 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 2237 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2238 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 2239 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2240 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 2241 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 2242 FL_KEY_IS_MASKED(mask, enc_ipv6) || 2243 FL_KEY_IS_MASKED(mask, enc_control)) 2244 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 2245 enc_control); 2246 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2247 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 2248 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2249 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 2250 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2251 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 2252 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2253 FLOW_DISSECTOR_KEY_CT, ct); 2254 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2255 FLOW_DISSECTOR_KEY_HASH, hash); 2256 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2257 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 2258 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2259 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 2260 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2261 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 2262 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2263 FLOW_DISSECTOR_KEY_IPSEC, ipsec); 2264 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2265 FLOW_DISSECTOR_KEY_CFM, cfm); 2266 2267 skb_flow_dissector_init(dissector, keys, cnt); 2268 } 2269 2270 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 2271 struct fl_flow_mask *mask) 2272 { 2273 struct fl_flow_mask *newmask; 2274 int err; 2275 2276 newmask = kzalloc_obj(*newmask, GFP_KERNEL_ACCOUNT); 2277 if (!newmask) 2278 return ERR_PTR(-ENOMEM); 2279 2280 fl_mask_copy(newmask, mask); 2281 2282 if ((newmask->key.tp_range.tp_min.dst && 2283 newmask->key.tp_range.tp_max.dst) || 2284 (newmask->key.tp_range.tp_min.src && 2285 newmask->key.tp_range.tp_max.src)) 2286 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2287 2288 err = fl_init_mask_hashtable(newmask); 2289 if (err) 2290 goto errout_free; 2291 2292 fl_init_dissector(&newmask->dissector, &newmask->key); 2293 2294 INIT_LIST_HEAD_RCU(&newmask->filters); 2295 2296 refcount_set(&newmask->refcnt, 1); 2297 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2298 &newmask->ht_node, mask_ht_params); 2299 if (err) 2300 goto errout_destroy; 2301 2302 spin_lock(&head->masks_lock); 2303 list_add_tail_rcu(&newmask->list, &head->masks); 2304 spin_unlock(&head->masks_lock); 2305 2306 return newmask; 2307 2308 errout_destroy: 2309 rhashtable_destroy(&newmask->ht); 2310 errout_free: 2311 kfree(newmask); 2312 2313 return ERR_PTR(err); 2314 } 2315 2316 static int fl_check_assign_mask(struct cls_fl_head *head, 2317 struct cls_fl_filter *fnew, 2318 struct cls_fl_filter *fold, 2319 struct fl_flow_mask *mask) 2320 { 2321 struct fl_flow_mask *newmask; 2322 int ret = 0; 2323 2324 rcu_read_lock(); 2325 2326 /* Insert mask as temporary node to prevent concurrent creation of mask 2327 * with same key. Any concurrent lookups with same key will return 2328 * -EAGAIN because mask's refcnt is zero. 2329 */ 2330 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2331 &mask->ht_node, 2332 mask_ht_params); 2333 if (!fnew->mask) { 2334 rcu_read_unlock(); 2335 2336 if (fold) { 2337 ret = -EINVAL; 2338 goto errout_cleanup; 2339 } 2340 2341 newmask = fl_create_new_mask(head, mask); 2342 if (IS_ERR(newmask)) { 2343 ret = PTR_ERR(newmask); 2344 goto errout_cleanup; 2345 } 2346 2347 fnew->mask = newmask; 2348 return 0; 2349 } else if (IS_ERR(fnew->mask)) { 2350 ret = PTR_ERR(fnew->mask); 2351 } else if (fold && fold->mask != fnew->mask) { 2352 ret = -EINVAL; 2353 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2354 /* Mask was deleted concurrently, try again */ 2355 ret = -EAGAIN; 2356 } 2357 rcu_read_unlock(); 2358 return ret; 2359 2360 errout_cleanup: 2361 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2362 mask_ht_params); 2363 return ret; 2364 } 2365 2366 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) 2367 { 2368 return mask->meta.l2_miss; 2369 } 2370 2371 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2372 struct cls_fl_filter *fold, 2373 bool *in_ht) 2374 { 2375 struct fl_flow_mask *mask = fnew->mask; 2376 int err; 2377 2378 err = rhashtable_lookup_insert_fast(&mask->ht, 2379 &fnew->ht_node, 2380 mask->filter_ht_params); 2381 if (err) { 2382 *in_ht = false; 2383 /* It is okay if filter with same key exists when 2384 * overwriting. 2385 */ 2386 return fold && err == -EEXIST ? 0 : err; 2387 } 2388 2389 *in_ht = true; 2390 return 0; 2391 } 2392 2393 static int fl_change(struct net *net, struct sk_buff *in_skb, 2394 struct tcf_proto *tp, unsigned long base, 2395 u32 handle, struct nlattr **tca, 2396 void **arg, u32 flags, 2397 struct netlink_ext_ack *extack) 2398 { 2399 struct cls_fl_head *head = fl_head_dereference(tp); 2400 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2401 struct nlattr *tca_opts = tca[TCA_OPTIONS]; 2402 struct cls_fl_filter *fold = *arg; 2403 bool bound_to_filter = false; 2404 struct cls_fl_filter *fnew; 2405 struct fl_flow_mask *mask; 2406 struct nlattr **tb; 2407 bool in_ht; 2408 int err; 2409 2410 if (!tca_opts) { 2411 err = -EINVAL; 2412 goto errout_fold; 2413 } 2414 2415 mask = kzalloc_obj(struct fl_flow_mask); 2416 if (!mask) { 2417 err = -ENOBUFS; 2418 goto errout_fold; 2419 } 2420 2421 tb = kzalloc_objs(struct nlattr *, TCA_FLOWER_MAX + 1); 2422 if (!tb) { 2423 err = -ENOBUFS; 2424 goto errout_mask_alloc; 2425 } 2426 2427 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2428 tca_opts, fl_policy, NULL); 2429 if (err < 0) 2430 goto errout_tb; 2431 2432 if (fold && handle && fold->handle != handle) { 2433 err = -EINVAL; 2434 goto errout_tb; 2435 } 2436 2437 fnew = kzalloc_obj(*fnew, GFP_KERNEL_ACCOUNT); 2438 if (!fnew) { 2439 err = -ENOBUFS; 2440 goto errout_tb; 2441 } 2442 INIT_LIST_HEAD(&fnew->hw_list); 2443 refcount_set(&fnew->refcnt, 1); 2444 2445 if (tb[TCA_FLOWER_FLAGS]) { 2446 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2447 2448 if (!tc_flags_valid(fnew->flags)) { 2449 kfree(fnew); 2450 err = -EINVAL; 2451 goto errout_tb; 2452 } 2453 } 2454 2455 if (!fold) { 2456 spin_lock(&tp->lock); 2457 if (!handle) { 2458 handle = 1; 2459 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2460 INT_MAX, GFP_ATOMIC); 2461 } else { 2462 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2463 handle, GFP_ATOMIC); 2464 2465 /* Filter with specified handle was concurrently 2466 * inserted after initial check in cls_api. This is not 2467 * necessarily an error if NLM_F_EXCL is not set in 2468 * message flags. Returning EAGAIN will cause cls_api to 2469 * try to update concurrently inserted rule. 2470 */ 2471 if (err == -ENOSPC) 2472 err = -EAGAIN; 2473 } 2474 spin_unlock(&tp->lock); 2475 2476 if (err) { 2477 kfree(fnew); 2478 goto errout_tb; 2479 } 2480 } 2481 fnew->handle = handle; 2482 2483 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2484 !tc_skip_hw(fnew->flags)); 2485 if (err < 0) 2486 goto errout_idr; 2487 2488 err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], 2489 &fnew->exts, flags, fnew->flags, 2490 extack); 2491 if (err < 0) 2492 goto errout_idr; 2493 2494 if (tb[TCA_FLOWER_CLASSID]) { 2495 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2496 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2497 rtnl_lock(); 2498 tcf_bind_filter(tp, &fnew->res, base); 2499 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2500 rtnl_unlock(); 2501 bound_to_filter = true; 2502 } 2503 2504 err = fl_set_key(net, tca_opts, tb, &fnew->key, &mask->key, extack); 2505 if (err) 2506 goto unbind_filter; 2507 2508 fl_mask_update_range(mask); 2509 fl_set_masked_key(&fnew->mkey, &fnew->key, mask); 2510 2511 if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { 2512 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2513 err = -EINVAL; 2514 goto unbind_filter; 2515 } 2516 2517 /* Enable tc skb extension if filter matches on data extracted from 2518 * this extension. 2519 */ 2520 if (fl_needs_tc_skb_ext(&mask->key)) { 2521 fnew->needs_tc_skb_ext = 1; 2522 tc_skb_ext_tc_enable(); 2523 } 2524 2525 err = fl_check_assign_mask(head, fnew, fold, mask); 2526 if (err) { 2527 fnew->mask = NULL; 2528 goto unbind_filter; 2529 } 2530 2531 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2532 if (err) 2533 goto unbind_filter; 2534 2535 if (!tc_skip_hw(fnew->flags)) { 2536 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2537 if (err) 2538 goto errout_ht; 2539 } 2540 2541 if (!tc_in_hw(fnew->flags)) 2542 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2543 2544 tcf_proto_update_usesw(tp, fnew->flags); 2545 2546 spin_lock(&tp->lock); 2547 2548 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2549 * proto again or create new one, if necessary. 2550 */ 2551 if (tp->deleting) { 2552 err = -EAGAIN; 2553 goto errout_hw; 2554 } 2555 2556 if (fold) { 2557 /* Fold filter was deleted concurrently. Retry lookup. */ 2558 if (fold->deleted) { 2559 err = -EAGAIN; 2560 goto errout_hw; 2561 } 2562 2563 fnew->handle = handle; 2564 2565 if (!in_ht) { 2566 struct rhashtable_params params = 2567 fnew->mask->filter_ht_params; 2568 2569 err = rhashtable_insert_fast(&fnew->mask->ht, 2570 &fnew->ht_node, 2571 params); 2572 if (err) 2573 goto errout_hw; 2574 in_ht = true; 2575 } 2576 2577 refcount_inc(&fnew->refcnt); 2578 rhashtable_remove_fast(&fold->mask->ht, 2579 &fold->ht_node, 2580 fold->mask->filter_ht_params); 2581 idr_replace(&head->handle_idr, fnew, fnew->handle); 2582 list_replace_rcu(&fold->list, &fnew->list); 2583 fold->deleted = true; 2584 2585 spin_unlock(&tp->lock); 2586 2587 if (!tc_skip_hw(fold->flags)) 2588 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2589 tcf_unbind_filter(tp, &fold->res); 2590 /* Caller holds reference to fold, so refcnt is always > 0 2591 * after this. 2592 */ 2593 refcount_dec(&fold->refcnt); 2594 __fl_put(tp, fold); 2595 } else { 2596 idr_replace(&head->handle_idr, fnew, fnew->handle); 2597 2598 refcount_inc(&fnew->refcnt); 2599 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2600 spin_unlock(&tp->lock); 2601 } 2602 2603 *arg = fnew; 2604 2605 kfree(tb); 2606 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2607 return 0; 2608 2609 errout_ht: 2610 spin_lock(&tp->lock); 2611 errout_hw: 2612 fnew->deleted = true; 2613 spin_unlock(&tp->lock); 2614 if (!tc_skip_hw(fnew->flags)) 2615 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2616 if (in_ht) 2617 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2618 fnew->mask->filter_ht_params); 2619 unbind_filter: 2620 if (bound_to_filter) { 2621 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2622 rtnl_lock(); 2623 tcf_unbind_filter(tp, &fnew->res); 2624 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2625 rtnl_unlock(); 2626 } 2627 2628 errout_idr: 2629 if (!fold) { 2630 spin_lock(&tp->lock); 2631 idr_remove(&head->handle_idr, fnew->handle); 2632 spin_unlock(&tp->lock); 2633 } 2634 __fl_put(tp, fnew); 2635 errout_tb: 2636 kfree(tb); 2637 errout_mask_alloc: 2638 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2639 errout_fold: 2640 if (fold) 2641 __fl_put(tp, fold); 2642 return err; 2643 } 2644 2645 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2646 bool rtnl_held, struct netlink_ext_ack *extack) 2647 { 2648 struct cls_fl_head *head = fl_head_dereference(tp); 2649 struct cls_fl_filter *f = arg; 2650 bool last_on_mask; 2651 int err = 0; 2652 2653 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2654 spin_lock(&tp->lock); 2655 *last = idr_is_empty(&head->handle_idr); 2656 spin_unlock(&tp->lock); 2657 __fl_put(tp, f); 2658 2659 return err; 2660 } 2661 2662 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2663 bool rtnl_held) 2664 { 2665 struct cls_fl_head *head = fl_head_dereference(tp); 2666 unsigned long id = arg->cookie, tmp; 2667 struct cls_fl_filter *f; 2668 2669 arg->count = arg->skip; 2670 2671 rcu_read_lock(); 2672 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2673 /* don't return filters that are being deleted */ 2674 if (!f || !refcount_inc_not_zero(&f->refcnt)) 2675 continue; 2676 rcu_read_unlock(); 2677 2678 if (arg->fn(tp, f, arg) < 0) { 2679 __fl_put(tp, f); 2680 arg->stop = 1; 2681 rcu_read_lock(); 2682 break; 2683 } 2684 __fl_put(tp, f); 2685 arg->count++; 2686 rcu_read_lock(); 2687 } 2688 rcu_read_unlock(); 2689 arg->cookie = id; 2690 } 2691 2692 static struct cls_fl_filter * 2693 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2694 { 2695 struct cls_fl_head *head = fl_head_dereference(tp); 2696 2697 spin_lock(&tp->lock); 2698 if (list_empty(&head->hw_filters)) { 2699 spin_unlock(&tp->lock); 2700 return NULL; 2701 } 2702 2703 if (!f) 2704 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2705 hw_list); 2706 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2707 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2708 spin_unlock(&tp->lock); 2709 return f; 2710 } 2711 } 2712 2713 spin_unlock(&tp->lock); 2714 return NULL; 2715 } 2716 2717 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2718 void *cb_priv, struct netlink_ext_ack *extack) 2719 { 2720 struct tcf_block *block = tp->chain->block; 2721 struct flow_cls_offload cls_flower = {}; 2722 struct cls_fl_filter *f = NULL; 2723 int err; 2724 2725 /* hw_filters list can only be changed by hw offload functions after 2726 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2727 * iterating it. 2728 */ 2729 ASSERT_RTNL(); 2730 2731 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2732 cls_flower.rule = 2733 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2734 if (!cls_flower.rule) { 2735 __fl_put(tp, f); 2736 return -ENOMEM; 2737 } 2738 2739 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2740 extack); 2741 cls_flower.command = add ? 2742 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2743 cls_flower.cookie = (unsigned long)f; 2744 cls_flower.rule->match.dissector = &f->mask->dissector; 2745 cls_flower.rule->match.mask = &f->mask->key; 2746 cls_flower.rule->match.key = &f->mkey; 2747 2748 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2749 cls_flower.common.extack); 2750 if (err) { 2751 kfree(cls_flower.rule); 2752 if (tc_skip_sw(f->flags)) { 2753 __fl_put(tp, f); 2754 return err; 2755 } 2756 goto next_flow; 2757 } 2758 2759 cls_flower.classid = f->res.classid; 2760 2761 err = tc_setup_cb_reoffload(block, tp, add, cb, 2762 TC_SETUP_CLSFLOWER, &cls_flower, 2763 cb_priv, &f->flags, 2764 &f->in_hw_count); 2765 tc_cleanup_offload_action(&cls_flower.rule->action); 2766 kfree(cls_flower.rule); 2767 2768 if (err) { 2769 __fl_put(tp, f); 2770 return err; 2771 } 2772 next_flow: 2773 __fl_put(tp, f); 2774 } 2775 2776 return 0; 2777 } 2778 2779 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2780 { 2781 struct flow_cls_offload *cls_flower = type_data; 2782 struct cls_fl_filter *f = 2783 (struct cls_fl_filter *) cls_flower->cookie; 2784 struct cls_fl_head *head = fl_head_dereference(tp); 2785 2786 spin_lock(&tp->lock); 2787 list_add(&f->hw_list, &head->hw_filters); 2788 spin_unlock(&tp->lock); 2789 } 2790 2791 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2792 { 2793 struct flow_cls_offload *cls_flower = type_data; 2794 struct cls_fl_filter *f = 2795 (struct cls_fl_filter *) cls_flower->cookie; 2796 2797 spin_lock(&tp->lock); 2798 if (!list_empty(&f->hw_list)) 2799 list_del_init(&f->hw_list); 2800 spin_unlock(&tp->lock); 2801 } 2802 2803 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2804 struct fl_flow_tmplt *tmplt) 2805 { 2806 struct flow_cls_offload cls_flower = {}; 2807 struct tcf_block *block = chain->block; 2808 2809 cls_flower.rule = flow_rule_alloc(0); 2810 if (!cls_flower.rule) 2811 return -ENOMEM; 2812 2813 cls_flower.common.chain_index = chain->index; 2814 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2815 cls_flower.cookie = (unsigned long) tmplt; 2816 cls_flower.rule->match.dissector = &tmplt->dissector; 2817 cls_flower.rule->match.mask = &tmplt->mask; 2818 cls_flower.rule->match.key = &tmplt->dummy_key; 2819 2820 /* We don't care if driver (any of them) fails to handle this 2821 * call. It serves just as a hint for it. 2822 */ 2823 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2824 kfree(cls_flower.rule); 2825 2826 return 0; 2827 } 2828 2829 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2830 struct fl_flow_tmplt *tmplt) 2831 { 2832 struct flow_cls_offload cls_flower = {}; 2833 struct tcf_block *block = chain->block; 2834 2835 cls_flower.common.chain_index = chain->index; 2836 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2837 cls_flower.cookie = (unsigned long) tmplt; 2838 2839 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2840 } 2841 2842 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2843 struct nlattr **tca, 2844 struct netlink_ext_ack *extack) 2845 { 2846 struct nlattr *tca_opts = tca[TCA_OPTIONS]; 2847 struct fl_flow_tmplt *tmplt; 2848 struct nlattr **tb; 2849 int err; 2850 2851 if (!tca_opts) 2852 return ERR_PTR(-EINVAL); 2853 2854 tb = kzalloc_objs(struct nlattr *, TCA_FLOWER_MAX + 1); 2855 if (!tb) 2856 return ERR_PTR(-ENOBUFS); 2857 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2858 tca_opts, fl_policy, NULL); 2859 if (err) 2860 goto errout_tb; 2861 2862 tmplt = kzalloc_obj(*tmplt); 2863 if (!tmplt) { 2864 err = -ENOMEM; 2865 goto errout_tb; 2866 } 2867 tmplt->chain = chain; 2868 err = fl_set_key(net, tca_opts, tb, &tmplt->dummy_key, 2869 &tmplt->mask, extack); 2870 if (err) 2871 goto errout_tmplt; 2872 2873 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2874 2875 err = fl_hw_create_tmplt(chain, tmplt); 2876 if (err) 2877 goto errout_tmplt; 2878 2879 kfree(tb); 2880 return tmplt; 2881 2882 errout_tmplt: 2883 kfree(tmplt); 2884 errout_tb: 2885 kfree(tb); 2886 return ERR_PTR(err); 2887 } 2888 2889 static void fl_tmplt_destroy(void *tmplt_priv) 2890 { 2891 struct fl_flow_tmplt *tmplt = tmplt_priv; 2892 2893 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2894 kfree(tmplt); 2895 } 2896 2897 static void fl_tmplt_reoffload(struct tcf_chain *chain, bool add, 2898 flow_setup_cb_t *cb, void *cb_priv) 2899 { 2900 struct fl_flow_tmplt *tmplt = chain->tmplt_priv; 2901 struct flow_cls_offload cls_flower = {}; 2902 2903 cls_flower.rule = flow_rule_alloc(0); 2904 if (!cls_flower.rule) 2905 return; 2906 2907 cls_flower.common.chain_index = chain->index; 2908 cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE : 2909 FLOW_CLS_TMPLT_DESTROY; 2910 cls_flower.cookie = (unsigned long) tmplt; 2911 cls_flower.rule->match.dissector = &tmplt->dissector; 2912 cls_flower.rule->match.mask = &tmplt->mask; 2913 cls_flower.rule->match.key = &tmplt->dummy_key; 2914 2915 cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 2916 kfree(cls_flower.rule); 2917 } 2918 2919 static int fl_dump_key_val(struct sk_buff *skb, 2920 void *val, int val_type, 2921 void *mask, int mask_type, int len) 2922 { 2923 int err; 2924 2925 if (!memchr_inv(mask, 0, len)) 2926 return 0; 2927 err = nla_put(skb, val_type, len, val); 2928 if (err) 2929 return err; 2930 if (mask_type != TCA_FLOWER_UNSPEC) { 2931 err = nla_put(skb, mask_type, len, mask); 2932 if (err) 2933 return err; 2934 } 2935 return 0; 2936 } 2937 2938 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2939 struct fl_flow_key *mask) 2940 { 2941 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2942 TCA_FLOWER_KEY_PORT_DST_MIN, 2943 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2944 sizeof(key->tp_range.tp_min.dst)) || 2945 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2946 TCA_FLOWER_KEY_PORT_DST_MAX, 2947 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2948 sizeof(key->tp_range.tp_max.dst)) || 2949 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2950 TCA_FLOWER_KEY_PORT_SRC_MIN, 2951 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2952 sizeof(key->tp_range.tp_min.src)) || 2953 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2954 TCA_FLOWER_KEY_PORT_SRC_MAX, 2955 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2956 sizeof(key->tp_range.tp_max.src))) 2957 return -1; 2958 2959 return 0; 2960 } 2961 2962 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2963 struct flow_dissector_key_mpls *mpls_key, 2964 struct flow_dissector_key_mpls *mpls_mask, 2965 u8 lse_index) 2966 { 2967 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2968 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2969 int err; 2970 2971 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2972 lse_index + 1); 2973 if (err) 2974 return err; 2975 2976 if (lse_mask->mpls_ttl) { 2977 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2978 lse_key->mpls_ttl); 2979 if (err) 2980 return err; 2981 } 2982 if (lse_mask->mpls_bos) { 2983 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2984 lse_key->mpls_bos); 2985 if (err) 2986 return err; 2987 } 2988 if (lse_mask->mpls_tc) { 2989 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2990 lse_key->mpls_tc); 2991 if (err) 2992 return err; 2993 } 2994 if (lse_mask->mpls_label) { 2995 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2996 lse_key->mpls_label); 2997 if (err) 2998 return err; 2999 } 3000 3001 return 0; 3002 } 3003 3004 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 3005 struct flow_dissector_key_mpls *mpls_key, 3006 struct flow_dissector_key_mpls *mpls_mask) 3007 { 3008 struct nlattr *opts; 3009 struct nlattr *lse; 3010 u8 lse_index; 3011 int err; 3012 3013 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 3014 if (!opts) 3015 return -EMSGSIZE; 3016 3017 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 3018 if (!(mpls_mask->used_lses & 1 << lse_index)) 3019 continue; 3020 3021 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 3022 if (!lse) { 3023 err = -EMSGSIZE; 3024 goto err_opts; 3025 } 3026 3027 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 3028 lse_index); 3029 if (err) 3030 goto err_opts_lse; 3031 nla_nest_end(skb, lse); 3032 } 3033 nla_nest_end(skb, opts); 3034 3035 return 0; 3036 3037 err_opts_lse: 3038 nla_nest_cancel(skb, lse); 3039 err_opts: 3040 nla_nest_cancel(skb, opts); 3041 3042 return err; 3043 } 3044 3045 static int fl_dump_key_mpls(struct sk_buff *skb, 3046 struct flow_dissector_key_mpls *mpls_key, 3047 struct flow_dissector_key_mpls *mpls_mask) 3048 { 3049 struct flow_dissector_mpls_lse *lse_mask; 3050 struct flow_dissector_mpls_lse *lse_key; 3051 int err; 3052 3053 if (!mpls_mask->used_lses) 3054 return 0; 3055 3056 lse_mask = &mpls_mask->ls[0]; 3057 lse_key = &mpls_key->ls[0]; 3058 3059 /* For backward compatibility, don't use the MPLS nested attributes if 3060 * the rule can be expressed using the old attributes. 3061 */ 3062 if (mpls_mask->used_lses & ~1 || 3063 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 3064 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 3065 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 3066 3067 if (lse_mask->mpls_ttl) { 3068 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 3069 lse_key->mpls_ttl); 3070 if (err) 3071 return err; 3072 } 3073 if (lse_mask->mpls_tc) { 3074 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 3075 lse_key->mpls_tc); 3076 if (err) 3077 return err; 3078 } 3079 if (lse_mask->mpls_label) { 3080 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 3081 lse_key->mpls_label); 3082 if (err) 3083 return err; 3084 } 3085 if (lse_mask->mpls_bos) { 3086 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 3087 lse_key->mpls_bos); 3088 if (err) 3089 return err; 3090 } 3091 return 0; 3092 } 3093 3094 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 3095 struct flow_dissector_key_ip *key, 3096 struct flow_dissector_key_ip *mask) 3097 { 3098 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 3099 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 3100 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 3101 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 3102 3103 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 3104 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 3105 return -1; 3106 3107 return 0; 3108 } 3109 3110 static int fl_dump_key_vlan(struct sk_buff *skb, 3111 int vlan_id_key, int vlan_prio_key, 3112 struct flow_dissector_key_vlan *vlan_key, 3113 struct flow_dissector_key_vlan *vlan_mask) 3114 { 3115 int err; 3116 3117 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 3118 return 0; 3119 if (vlan_mask->vlan_id) { 3120 err = nla_put_u16(skb, vlan_id_key, 3121 vlan_key->vlan_id); 3122 if (err) 3123 return err; 3124 } 3125 if (vlan_mask->vlan_priority) { 3126 err = nla_put_u8(skb, vlan_prio_key, 3127 vlan_key->vlan_priority); 3128 if (err) 3129 return err; 3130 } 3131 return 0; 3132 } 3133 3134 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 3135 u32 *flower_key, u32 *flower_mask, 3136 u32 flower_flag_bit, u32 dissector_flag_bit) 3137 { 3138 if (dissector_mask & dissector_flag_bit) { 3139 *flower_mask |= flower_flag_bit; 3140 if (dissector_key & dissector_flag_bit) 3141 *flower_key |= flower_flag_bit; 3142 } 3143 } 3144 3145 static int fl_dump_key_flags(struct sk_buff *skb, bool encap, 3146 u32 flags_key, u32 flags_mask) 3147 { 3148 int fl_key, fl_mask; 3149 __be32 _key, _mask; 3150 u32 key, mask; 3151 int err; 3152 3153 if (encap) { 3154 fl_key = TCA_FLOWER_KEY_ENC_FLAGS; 3155 fl_mask = TCA_FLOWER_KEY_ENC_FLAGS_MASK; 3156 } else { 3157 fl_key = TCA_FLOWER_KEY_FLAGS; 3158 fl_mask = TCA_FLOWER_KEY_FLAGS_MASK; 3159 } 3160 3161 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 3162 return 0; 3163 3164 key = 0; 3165 mask = 0; 3166 3167 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3168 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 3169 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3170 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 3171 FLOW_DIS_FIRST_FRAG); 3172 3173 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3174 TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM, 3175 FLOW_DIS_F_TUNNEL_CSUM); 3176 3177 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3178 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT, 3179 FLOW_DIS_F_TUNNEL_DONT_FRAGMENT); 3180 3181 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3182 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM, FLOW_DIS_F_TUNNEL_OAM); 3183 3184 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3185 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT, 3186 FLOW_DIS_F_TUNNEL_CRIT_OPT); 3187 3188 _key = cpu_to_be32(key); 3189 _mask = cpu_to_be32(mask); 3190 3191 err = nla_put(skb, fl_key, 4, &_key); 3192 if (err) 3193 return err; 3194 3195 return nla_put(skb, fl_mask, 4, &_mask); 3196 } 3197 3198 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 3199 struct flow_dissector_key_enc_opts *enc_opts) 3200 { 3201 struct geneve_opt *opt; 3202 struct nlattr *nest; 3203 int opt_off = 0; 3204 3205 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 3206 if (!nest) 3207 goto nla_put_failure; 3208 3209 while (enc_opts->len > opt_off) { 3210 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 3211 3212 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 3213 opt->opt_class)) 3214 goto nla_put_failure; 3215 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 3216 opt->type)) 3217 goto nla_put_failure; 3218 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 3219 opt->length * 4, opt->opt_data)) 3220 goto nla_put_failure; 3221 3222 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 3223 } 3224 nla_nest_end(skb, nest); 3225 return 0; 3226 3227 nla_put_failure: 3228 nla_nest_cancel(skb, nest); 3229 return -EMSGSIZE; 3230 } 3231 3232 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 3233 struct flow_dissector_key_enc_opts *enc_opts) 3234 { 3235 struct vxlan_metadata *md; 3236 struct nlattr *nest; 3237 3238 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 3239 if (!nest) 3240 goto nla_put_failure; 3241 3242 md = (struct vxlan_metadata *)&enc_opts->data[0]; 3243 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 3244 goto nla_put_failure; 3245 3246 nla_nest_end(skb, nest); 3247 return 0; 3248 3249 nla_put_failure: 3250 nla_nest_cancel(skb, nest); 3251 return -EMSGSIZE; 3252 } 3253 3254 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 3255 struct flow_dissector_key_enc_opts *enc_opts) 3256 { 3257 struct erspan_metadata *md; 3258 struct nlattr *nest; 3259 3260 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 3261 if (!nest) 3262 goto nla_put_failure; 3263 3264 md = (struct erspan_metadata *)&enc_opts->data[0]; 3265 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 3266 goto nla_put_failure; 3267 3268 if (md->version == 1 && 3269 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 3270 goto nla_put_failure; 3271 3272 if (md->version == 2 && 3273 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 3274 md->u.md2.dir) || 3275 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 3276 get_hwid(&md->u.md2)))) 3277 goto nla_put_failure; 3278 3279 nla_nest_end(skb, nest); 3280 return 0; 3281 3282 nla_put_failure: 3283 nla_nest_cancel(skb, nest); 3284 return -EMSGSIZE; 3285 } 3286 3287 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 3288 struct flow_dissector_key_enc_opts *enc_opts) 3289 3290 { 3291 struct gtp_pdu_session_info *session_info; 3292 struct nlattr *nest; 3293 3294 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 3295 if (!nest) 3296 goto nla_put_failure; 3297 3298 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 3299 3300 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 3301 session_info->pdu_type)) 3302 goto nla_put_failure; 3303 3304 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 3305 goto nla_put_failure; 3306 3307 nla_nest_end(skb, nest); 3308 return 0; 3309 3310 nla_put_failure: 3311 nla_nest_cancel(skb, nest); 3312 return -EMSGSIZE; 3313 } 3314 3315 static int fl_dump_key_pfcp_opt(struct sk_buff *skb, 3316 struct flow_dissector_key_enc_opts *enc_opts) 3317 { 3318 struct pfcp_metadata *md; 3319 struct nlattr *nest; 3320 3321 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_PFCP); 3322 if (!nest) 3323 goto nla_put_failure; 3324 3325 md = (struct pfcp_metadata *)&enc_opts->data[0]; 3326 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE, md->type)) 3327 goto nla_put_failure; 3328 3329 if (nla_put_be64(skb, TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID, 3330 md->seid, 0)) 3331 goto nla_put_failure; 3332 3333 nla_nest_end(skb, nest); 3334 return 0; 3335 3336 nla_put_failure: 3337 nla_nest_cancel(skb, nest); 3338 return -EMSGSIZE; 3339 } 3340 3341 static int fl_dump_key_ct(struct sk_buff *skb, 3342 struct flow_dissector_key_ct *key, 3343 struct flow_dissector_key_ct *mask) 3344 { 3345 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 3346 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 3347 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 3348 sizeof(key->ct_state))) 3349 goto nla_put_failure; 3350 3351 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 3352 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 3353 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 3354 sizeof(key->ct_zone))) 3355 goto nla_put_failure; 3356 3357 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3358 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 3359 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 3360 sizeof(key->ct_mark))) 3361 goto nla_put_failure; 3362 3363 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3364 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 3365 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 3366 sizeof(key->ct_labels))) 3367 goto nla_put_failure; 3368 3369 return 0; 3370 3371 nla_put_failure: 3372 return -EMSGSIZE; 3373 } 3374 3375 static int fl_dump_key_cfm(struct sk_buff *skb, 3376 struct flow_dissector_key_cfm *key, 3377 struct flow_dissector_key_cfm *mask) 3378 { 3379 struct nlattr *opts; 3380 int err; 3381 u8 mdl; 3382 3383 if (!memchr_inv(mask, 0, sizeof(*mask))) 3384 return 0; 3385 3386 opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); 3387 if (!opts) 3388 return -EMSGSIZE; 3389 3390 if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { 3391 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); 3392 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); 3393 if (err) 3394 goto err_cfm_opts; 3395 } 3396 3397 if (mask->opcode) { 3398 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); 3399 if (err) 3400 goto err_cfm_opts; 3401 } 3402 3403 nla_nest_end(skb, opts); 3404 3405 return 0; 3406 3407 err_cfm_opts: 3408 nla_nest_cancel(skb, opts); 3409 return err; 3410 } 3411 3412 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3413 struct flow_dissector_key_enc_opts *enc_opts) 3414 { 3415 struct nlattr *nest; 3416 int err; 3417 3418 if (!enc_opts->len) 3419 return 0; 3420 3421 nest = nla_nest_start_noflag(skb, enc_opt_type); 3422 if (!nest) 3423 goto nla_put_failure; 3424 3425 switch (enc_opts->dst_opt_type) { 3426 case IP_TUNNEL_GENEVE_OPT_BIT: 3427 err = fl_dump_key_geneve_opt(skb, enc_opts); 3428 if (err) 3429 goto nla_put_failure; 3430 break; 3431 case IP_TUNNEL_VXLAN_OPT_BIT: 3432 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3433 if (err) 3434 goto nla_put_failure; 3435 break; 3436 case IP_TUNNEL_ERSPAN_OPT_BIT: 3437 err = fl_dump_key_erspan_opt(skb, enc_opts); 3438 if (err) 3439 goto nla_put_failure; 3440 break; 3441 case IP_TUNNEL_GTP_OPT_BIT: 3442 err = fl_dump_key_gtp_opt(skb, enc_opts); 3443 if (err) 3444 goto nla_put_failure; 3445 break; 3446 case IP_TUNNEL_PFCP_OPT_BIT: 3447 err = fl_dump_key_pfcp_opt(skb, enc_opts); 3448 if (err) 3449 goto nla_put_failure; 3450 break; 3451 default: 3452 goto nla_put_failure; 3453 } 3454 nla_nest_end(skb, nest); 3455 return 0; 3456 3457 nla_put_failure: 3458 nla_nest_cancel(skb, nest); 3459 return -EMSGSIZE; 3460 } 3461 3462 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3463 struct flow_dissector_key_enc_opts *key_opts, 3464 struct flow_dissector_key_enc_opts *msk_opts) 3465 { 3466 int err; 3467 3468 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3469 if (err) 3470 return err; 3471 3472 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3473 } 3474 3475 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3476 struct fl_flow_key *key, struct fl_flow_key *mask) 3477 { 3478 if (mask->meta.ingress_ifindex) { 3479 struct net_device *dev; 3480 3481 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3482 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3483 goto nla_put_failure; 3484 } 3485 3486 if (fl_dump_key_val(skb, &key->meta.l2_miss, 3487 TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, 3488 TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 3489 goto nla_put_failure; 3490 3491 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3492 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3493 sizeof(key->eth.dst)) || 3494 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3495 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3496 sizeof(key->eth.src)) || 3497 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3498 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3499 sizeof(key->basic.n_proto))) 3500 goto nla_put_failure; 3501 3502 if (mask->num_of_vlans.num_of_vlans) { 3503 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3504 goto nla_put_failure; 3505 } 3506 3507 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3508 goto nla_put_failure; 3509 3510 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3511 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3512 goto nla_put_failure; 3513 3514 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3515 TCA_FLOWER_KEY_CVLAN_PRIO, 3516 &key->cvlan, &mask->cvlan) || 3517 (mask->cvlan.vlan_tpid && 3518 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3519 key->cvlan.vlan_tpid))) 3520 goto nla_put_failure; 3521 3522 if (mask->basic.n_proto) { 3523 if (mask->cvlan.vlan_eth_type) { 3524 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3525 key->basic.n_proto)) 3526 goto nla_put_failure; 3527 } else if (mask->vlan.vlan_eth_type) { 3528 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3529 key->vlan.vlan_eth_type)) 3530 goto nla_put_failure; 3531 } 3532 } 3533 3534 if ((key->basic.n_proto == htons(ETH_P_IP) || 3535 key->basic.n_proto == htons(ETH_P_IPV6)) && 3536 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3537 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3538 sizeof(key->basic.ip_proto)) || 3539 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3540 goto nla_put_failure; 3541 3542 if (mask->pppoe.session_id) { 3543 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3544 key->pppoe.session_id)) 3545 goto nla_put_failure; 3546 } 3547 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3548 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3549 key->pppoe.ppp_proto)) 3550 goto nla_put_failure; 3551 } 3552 3553 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3554 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3555 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3556 sizeof(key->ipv4.src)) || 3557 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3558 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3559 sizeof(key->ipv4.dst)))) 3560 goto nla_put_failure; 3561 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3562 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3563 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3564 sizeof(key->ipv6.src)) || 3565 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3566 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3567 sizeof(key->ipv6.dst)))) 3568 goto nla_put_failure; 3569 3570 if (key->basic.ip_proto == IPPROTO_TCP && 3571 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3572 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3573 sizeof(key->tp.src)) || 3574 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3575 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3576 sizeof(key->tp.dst)) || 3577 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3578 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3579 sizeof(key->tcp.flags)))) 3580 goto nla_put_failure; 3581 else if (key->basic.ip_proto == IPPROTO_UDP && 3582 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3583 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3584 sizeof(key->tp.src)) || 3585 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3586 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3587 sizeof(key->tp.dst)))) 3588 goto nla_put_failure; 3589 else if (key->basic.ip_proto == IPPROTO_SCTP && 3590 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3591 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3592 sizeof(key->tp.src)) || 3593 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3594 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3595 sizeof(key->tp.dst)))) 3596 goto nla_put_failure; 3597 else if (key->basic.n_proto == htons(ETH_P_IP) && 3598 key->basic.ip_proto == IPPROTO_ICMP && 3599 (fl_dump_key_val(skb, &key->icmp.type, 3600 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3601 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3602 sizeof(key->icmp.type)) || 3603 fl_dump_key_val(skb, &key->icmp.code, 3604 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3605 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3606 sizeof(key->icmp.code)))) 3607 goto nla_put_failure; 3608 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3609 key->basic.ip_proto == IPPROTO_ICMPV6 && 3610 (fl_dump_key_val(skb, &key->icmp.type, 3611 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3612 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3613 sizeof(key->icmp.type)) || 3614 fl_dump_key_val(skb, &key->icmp.code, 3615 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3616 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3617 sizeof(key->icmp.code)))) 3618 goto nla_put_failure; 3619 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3620 key->basic.n_proto == htons(ETH_P_RARP)) && 3621 (fl_dump_key_val(skb, &key->arp.sip, 3622 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3623 TCA_FLOWER_KEY_ARP_SIP_MASK, 3624 sizeof(key->arp.sip)) || 3625 fl_dump_key_val(skb, &key->arp.tip, 3626 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3627 TCA_FLOWER_KEY_ARP_TIP_MASK, 3628 sizeof(key->arp.tip)) || 3629 fl_dump_key_val(skb, &key->arp.op, 3630 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3631 TCA_FLOWER_KEY_ARP_OP_MASK, 3632 sizeof(key->arp.op)) || 3633 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3634 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3635 sizeof(key->arp.sha)) || 3636 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3637 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3638 sizeof(key->arp.tha)))) 3639 goto nla_put_failure; 3640 else if (key->basic.ip_proto == IPPROTO_L2TP && 3641 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3642 TCA_FLOWER_KEY_L2TPV3_SID, 3643 &mask->l2tpv3.session_id, 3644 TCA_FLOWER_UNSPEC, 3645 sizeof(key->l2tpv3.session_id))) 3646 goto nla_put_failure; 3647 3648 if (key->ipsec.spi && 3649 fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, 3650 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 3651 sizeof(key->ipsec.spi))) 3652 goto nla_put_failure; 3653 3654 if ((key->basic.ip_proto == IPPROTO_TCP || 3655 key->basic.ip_proto == IPPROTO_UDP || 3656 key->basic.ip_proto == IPPROTO_SCTP) && 3657 fl_dump_key_port_range(skb, key, mask)) 3658 goto nla_put_failure; 3659 3660 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3661 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3662 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3663 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3664 sizeof(key->enc_ipv4.src)) || 3665 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3666 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3667 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3668 sizeof(key->enc_ipv4.dst)))) 3669 goto nla_put_failure; 3670 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3671 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3672 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3673 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3674 sizeof(key->enc_ipv6.src)) || 3675 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3676 TCA_FLOWER_KEY_ENC_IPV6_DST, 3677 &mask->enc_ipv6.dst, 3678 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3679 sizeof(key->enc_ipv6.dst)))) 3680 goto nla_put_failure; 3681 3682 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3683 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3684 sizeof(key->enc_key_id)) || 3685 fl_dump_key_val(skb, &key->enc_tp.src, 3686 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3687 &mask->enc_tp.src, 3688 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3689 sizeof(key->enc_tp.src)) || 3690 fl_dump_key_val(skb, &key->enc_tp.dst, 3691 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3692 &mask->enc_tp.dst, 3693 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3694 sizeof(key->enc_tp.dst)) || 3695 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3696 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3697 goto nla_put_failure; 3698 3699 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3700 goto nla_put_failure; 3701 3702 if (fl_dump_key_flags(skb, false, key->control.flags, 3703 mask->control.flags)) 3704 goto nla_put_failure; 3705 3706 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3707 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3708 sizeof(key->hash.hash))) 3709 goto nla_put_failure; 3710 3711 if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 3712 goto nla_put_failure; 3713 3714 if (fl_dump_key_flags(skb, true, key->enc_control.flags, 3715 mask->enc_control.flags)) 3716 goto nla_put_failure; 3717 3718 return 0; 3719 3720 nla_put_failure: 3721 return -EMSGSIZE; 3722 } 3723 3724 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3725 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3726 { 3727 struct cls_fl_filter *f = fh; 3728 struct nlattr *nest; 3729 struct fl_flow_key *key, *mask; 3730 bool skip_hw; 3731 3732 if (!f) 3733 return skb->len; 3734 3735 t->tcm_handle = f->handle; 3736 3737 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3738 if (!nest) 3739 goto nla_put_failure; 3740 3741 spin_lock(&tp->lock); 3742 3743 if (f->res.classid && 3744 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3745 goto nla_put_failure_locked; 3746 3747 key = &f->key; 3748 mask = &f->mask->key; 3749 skip_hw = tc_skip_hw(f->flags); 3750 3751 if (fl_dump_key(skb, net, key, mask)) 3752 goto nla_put_failure_locked; 3753 3754 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3755 goto nla_put_failure_locked; 3756 3757 spin_unlock(&tp->lock); 3758 3759 if (!skip_hw) 3760 fl_hw_update_stats(tp, f, rtnl_held); 3761 3762 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3763 goto nla_put_failure; 3764 3765 if (tcf_exts_dump(skb, &f->exts)) 3766 goto nla_put_failure; 3767 3768 if (nla_nest_end_safe(skb, nest) < 0) 3769 goto nla_put_failure; 3770 3771 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3772 goto nla_put_failure; 3773 3774 return skb->len; 3775 3776 nla_put_failure_locked: 3777 spin_unlock(&tp->lock); 3778 nla_put_failure: 3779 nla_nest_cancel(skb, nest); 3780 return -1; 3781 } 3782 3783 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3784 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3785 { 3786 struct cls_fl_filter *f = fh; 3787 struct nlattr *nest; 3788 bool skip_hw; 3789 3790 if (!f) 3791 return skb->len; 3792 3793 t->tcm_handle = f->handle; 3794 3795 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3796 if (!nest) 3797 goto nla_put_failure; 3798 3799 spin_lock(&tp->lock); 3800 3801 skip_hw = tc_skip_hw(f->flags); 3802 3803 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3804 goto nla_put_failure_locked; 3805 3806 spin_unlock(&tp->lock); 3807 3808 if (!skip_hw) 3809 fl_hw_update_stats(tp, f, rtnl_held); 3810 3811 if (tcf_exts_terse_dump(skb, &f->exts)) 3812 goto nla_put_failure; 3813 3814 if (nla_nest_end_safe(skb, nest) < 0) 3815 goto nla_put_failure; 3816 3817 return skb->len; 3818 3819 nla_put_failure_locked: 3820 spin_unlock(&tp->lock); 3821 nla_put_failure: 3822 nla_nest_cancel(skb, nest); 3823 return -1; 3824 } 3825 3826 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3827 { 3828 struct fl_flow_tmplt *tmplt = tmplt_priv; 3829 struct fl_flow_key *key, *mask; 3830 struct nlattr *nest; 3831 3832 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3833 if (!nest) 3834 goto nla_put_failure; 3835 3836 key = &tmplt->dummy_key; 3837 mask = &tmplt->mask; 3838 3839 if (fl_dump_key(skb, net, key, mask)) 3840 goto nla_put_failure; 3841 3842 nla_nest_end(skb, nest); 3843 3844 return skb->len; 3845 3846 nla_put_failure: 3847 nla_nest_cancel(skb, nest); 3848 return -EMSGSIZE; 3849 } 3850 3851 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3852 unsigned long base) 3853 { 3854 struct cls_fl_filter *f = fh; 3855 3856 tc_cls_bind_class(classid, cl, q, &f->res, base); 3857 } 3858 3859 static bool fl_delete_empty(struct tcf_proto *tp) 3860 { 3861 struct cls_fl_head *head = fl_head_dereference(tp); 3862 3863 spin_lock(&tp->lock); 3864 tp->deleting = idr_is_empty(&head->handle_idr); 3865 spin_unlock(&tp->lock); 3866 3867 return tp->deleting; 3868 } 3869 3870 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3871 .kind = "flower", 3872 .classify = fl_classify, 3873 .init = fl_init, 3874 .destroy = fl_destroy, 3875 .get = fl_get, 3876 .put = fl_put, 3877 .change = fl_change, 3878 .delete = fl_delete, 3879 .delete_empty = fl_delete_empty, 3880 .walk = fl_walk, 3881 .reoffload = fl_reoffload, 3882 .hw_add = fl_hw_add, 3883 .hw_del = fl_hw_del, 3884 .dump = fl_dump, 3885 .terse_dump = fl_terse_dump, 3886 .bind_class = fl_bind_class, 3887 .tmplt_create = fl_tmplt_create, 3888 .tmplt_destroy = fl_tmplt_destroy, 3889 .tmplt_reoffload = fl_tmplt_reoffload, 3890 .tmplt_dump = fl_tmplt_dump, 3891 .get_exts = fl_get_exts, 3892 .owner = THIS_MODULE, 3893 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3894 }; 3895 MODULE_ALIAS_NET_CLS("flower"); 3896 3897 static int __init cls_fl_init(void) 3898 { 3899 return register_tcf_proto_ops(&cls_fl_ops); 3900 } 3901 3902 static void __exit cls_fl_exit(void) 3903 { 3904 unregister_tcf_proto_ops(&cls_fl_ops); 3905 } 3906 3907 module_init(cls_fl_init); 3908 module_exit(cls_fl_exit); 3909 3910 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3911 MODULE_DESCRIPTION("Flower classifier"); 3912 MODULE_LICENSE("GPL v2"); 3913