1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/sched/cls_flower.c Flower classifier 4 * 5 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/init.h> 10 #include <linux/module.h> 11 #include <linux/rhashtable.h> 12 #include <linux/workqueue.h> 13 #include <linux/refcount.h> 14 #include <linux/bitfield.h> 15 16 #include <linux/if_ether.h> 17 #include <linux/in6.h> 18 #include <linux/ip.h> 19 #include <linux/mpls.h> 20 #include <linux/ppp_defs.h> 21 22 #include <net/sch_generic.h> 23 #include <net/pkt_cls.h> 24 #include <net/pkt_sched.h> 25 #include <net/ip.h> 26 #include <net/flow_dissector.h> 27 #include <net/geneve.h> 28 #include <net/vxlan.h> 29 #include <net/erspan.h> 30 #include <net/gtp.h> 31 #include <net/tc_wrapper.h> 32 33 #include <net/dst.h> 34 #include <net/dst_metadata.h> 35 36 #include <uapi/linux/netfilter/nf_conntrack_common.h> 37 38 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 39 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 40 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 41 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 42 43 struct fl_flow_key { 44 struct flow_dissector_key_meta meta; 45 struct flow_dissector_key_control control; 46 struct flow_dissector_key_control enc_control; 47 struct flow_dissector_key_basic basic; 48 struct flow_dissector_key_eth_addrs eth; 49 struct flow_dissector_key_vlan vlan; 50 struct flow_dissector_key_vlan cvlan; 51 union { 52 struct flow_dissector_key_ipv4_addrs ipv4; 53 struct flow_dissector_key_ipv6_addrs ipv6; 54 }; 55 struct flow_dissector_key_ports tp; 56 struct flow_dissector_key_icmp icmp; 57 struct flow_dissector_key_arp arp; 58 struct flow_dissector_key_keyid enc_key_id; 59 union { 60 struct flow_dissector_key_ipv4_addrs enc_ipv4; 61 struct flow_dissector_key_ipv6_addrs enc_ipv6; 62 }; 63 struct flow_dissector_key_ports enc_tp; 64 struct flow_dissector_key_mpls mpls; 65 struct flow_dissector_key_tcp tcp; 66 struct flow_dissector_key_ip ip; 67 struct flow_dissector_key_ip enc_ip; 68 struct flow_dissector_key_enc_opts enc_opts; 69 struct flow_dissector_key_ports_range tp_range; 70 struct flow_dissector_key_ct ct; 71 struct flow_dissector_key_hash hash; 72 struct flow_dissector_key_num_of_vlans num_of_vlans; 73 struct flow_dissector_key_pppoe pppoe; 74 struct flow_dissector_key_l2tpv3 l2tpv3; 75 struct flow_dissector_key_ipsec ipsec; 76 struct flow_dissector_key_cfm cfm; 77 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 78 79 struct fl_flow_mask_range { 80 unsigned short int start; 81 unsigned short int end; 82 }; 83 84 struct fl_flow_mask { 85 struct fl_flow_key key; 86 struct fl_flow_mask_range range; 87 u32 flags; 88 struct rhash_head ht_node; 89 struct rhashtable ht; 90 struct rhashtable_params filter_ht_params; 91 struct flow_dissector dissector; 92 struct list_head filters; 93 struct rcu_work rwork; 94 struct list_head list; 95 refcount_t refcnt; 96 }; 97 98 struct fl_flow_tmplt { 99 struct fl_flow_key dummy_key; 100 struct fl_flow_key mask; 101 struct flow_dissector dissector; 102 struct tcf_chain *chain; 103 }; 104 105 struct cls_fl_head { 106 struct rhashtable ht; 107 spinlock_t masks_lock; /* Protect masks list */ 108 struct list_head masks; 109 struct list_head hw_filters; 110 struct rcu_work rwork; 111 struct idr handle_idr; 112 }; 113 114 struct cls_fl_filter { 115 struct fl_flow_mask *mask; 116 struct rhash_head ht_node; 117 struct fl_flow_key mkey; 118 struct tcf_exts exts; 119 struct tcf_result res; 120 struct fl_flow_key key; 121 struct list_head list; 122 struct list_head hw_list; 123 u32 handle; 124 u32 flags; 125 u32 in_hw_count; 126 u8 needs_tc_skb_ext:1; 127 struct rcu_work rwork; 128 struct net_device *hw_dev; 129 /* Flower classifier is unlocked, which means that its reference counter 130 * can be changed concurrently without any kind of external 131 * synchronization. Use atomic reference counter to be concurrency-safe. 132 */ 133 refcount_t refcnt; 134 bool deleted; 135 }; 136 137 static const struct rhashtable_params mask_ht_params = { 138 .key_offset = offsetof(struct fl_flow_mask, key), 139 .key_len = sizeof(struct fl_flow_key), 140 .head_offset = offsetof(struct fl_flow_mask, ht_node), 141 .automatic_shrinking = true, 142 }; 143 144 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 145 { 146 return mask->range.end - mask->range.start; 147 } 148 149 static void fl_mask_update_range(struct fl_flow_mask *mask) 150 { 151 const u8 *bytes = (const u8 *) &mask->key; 152 size_t size = sizeof(mask->key); 153 size_t i, first = 0, last; 154 155 for (i = 0; i < size; i++) { 156 if (bytes[i]) { 157 first = i; 158 break; 159 } 160 } 161 last = first; 162 for (i = size - 1; i != first; i--) { 163 if (bytes[i]) { 164 last = i; 165 break; 166 } 167 } 168 mask->range.start = rounddown(first, sizeof(long)); 169 mask->range.end = roundup(last + 1, sizeof(long)); 170 } 171 172 static void *fl_key_get_start(struct fl_flow_key *key, 173 const struct fl_flow_mask *mask) 174 { 175 return (u8 *) key + mask->range.start; 176 } 177 178 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 179 struct fl_flow_mask *mask) 180 { 181 const long *lkey = fl_key_get_start(key, mask); 182 const long *lmask = fl_key_get_start(&mask->key, mask); 183 long *lmkey = fl_key_get_start(mkey, mask); 184 int i; 185 186 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 187 *lmkey++ = *lkey++ & *lmask++; 188 } 189 190 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 191 struct fl_flow_mask *mask) 192 { 193 const long *lmask = fl_key_get_start(&mask->key, mask); 194 const long *ltmplt; 195 int i; 196 197 if (!tmplt) 198 return true; 199 ltmplt = fl_key_get_start(&tmplt->mask, mask); 200 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 201 if (~*ltmplt++ & *lmask++) 202 return false; 203 } 204 return true; 205 } 206 207 static void fl_clear_masked_range(struct fl_flow_key *key, 208 struct fl_flow_mask *mask) 209 { 210 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 211 } 212 213 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 214 struct fl_flow_key *key, 215 struct fl_flow_key *mkey) 216 { 217 u16 min_mask, max_mask, min_val, max_val; 218 219 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 220 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 221 min_val = ntohs(filter->key.tp_range.tp_min.dst); 222 max_val = ntohs(filter->key.tp_range.tp_max.dst); 223 224 if (min_mask && max_mask) { 225 if (ntohs(key->tp_range.tp.dst) < min_val || 226 ntohs(key->tp_range.tp.dst) > max_val) 227 return false; 228 229 /* skb does not have min and max values */ 230 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 231 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 232 } 233 return true; 234 } 235 236 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 237 struct fl_flow_key *key, 238 struct fl_flow_key *mkey) 239 { 240 u16 min_mask, max_mask, min_val, max_val; 241 242 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 243 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 244 min_val = ntohs(filter->key.tp_range.tp_min.src); 245 max_val = ntohs(filter->key.tp_range.tp_max.src); 246 247 if (min_mask && max_mask) { 248 if (ntohs(key->tp_range.tp.src) < min_val || 249 ntohs(key->tp_range.tp.src) > max_val) 250 return false; 251 252 /* skb does not have min and max values */ 253 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 254 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 255 } 256 return true; 257 } 258 259 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 260 struct fl_flow_key *mkey) 261 { 262 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 263 mask->filter_ht_params); 264 } 265 266 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 267 struct fl_flow_key *mkey, 268 struct fl_flow_key *key) 269 { 270 struct cls_fl_filter *filter, *f; 271 272 list_for_each_entry_rcu(filter, &mask->filters, list) { 273 if (!fl_range_port_dst_cmp(filter, key, mkey)) 274 continue; 275 276 if (!fl_range_port_src_cmp(filter, key, mkey)) 277 continue; 278 279 f = __fl_lookup(mask, mkey); 280 if (f) 281 return f; 282 } 283 return NULL; 284 } 285 286 static noinline_for_stack 287 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 288 { 289 struct fl_flow_key mkey; 290 291 fl_set_masked_key(&mkey, key, mask); 292 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 293 return fl_lookup_range(mask, &mkey, key); 294 295 return __fl_lookup(mask, &mkey); 296 } 297 298 static u16 fl_ct_info_to_flower_map[] = { 299 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 300 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 301 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 302 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 303 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 304 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 305 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 306 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 307 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 308 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 309 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 310 TCA_FLOWER_KEY_CT_FLAGS_NEW, 311 }; 312 313 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb, 314 const struct tcf_proto *tp, 315 struct tcf_result *res) 316 { 317 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 318 bool post_ct = tc_skb_cb(skb)->post_ct; 319 u16 zone = tc_skb_cb(skb)->zone; 320 struct fl_flow_key skb_key; 321 struct fl_flow_mask *mask; 322 struct cls_fl_filter *f; 323 324 list_for_each_entry_rcu(mask, &head->masks, list) { 325 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 326 fl_clear_masked_range(&skb_key, mask); 327 328 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 329 /* skb_flow_dissect() does not set n_proto in case an unknown 330 * protocol, so do it rather here. 331 */ 332 skb_key.basic.n_proto = skb_protocol(skb, false); 333 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 334 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 335 fl_ct_info_to_flower_map, 336 ARRAY_SIZE(fl_ct_info_to_flower_map), 337 post_ct, zone); 338 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 339 skb_flow_dissect(skb, &mask->dissector, &skb_key, 340 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); 341 342 f = fl_mask_lookup(mask, &skb_key); 343 if (f && !tc_skip_sw(f->flags)) { 344 *res = f->res; 345 return tcf_exts_exec(skb, &f->exts, res); 346 } 347 } 348 return -1; 349 } 350 351 static int fl_init(struct tcf_proto *tp) 352 { 353 struct cls_fl_head *head; 354 355 head = kzalloc(sizeof(*head), GFP_KERNEL); 356 if (!head) 357 return -ENOBUFS; 358 359 spin_lock_init(&head->masks_lock); 360 INIT_LIST_HEAD_RCU(&head->masks); 361 INIT_LIST_HEAD(&head->hw_filters); 362 rcu_assign_pointer(tp->root, head); 363 idr_init(&head->handle_idr); 364 365 return rhashtable_init(&head->ht, &mask_ht_params); 366 } 367 368 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 369 { 370 /* temporary masks don't have their filters list and ht initialized */ 371 if (mask_init_done) { 372 WARN_ON(!list_empty(&mask->filters)); 373 rhashtable_destroy(&mask->ht); 374 } 375 kfree(mask); 376 } 377 378 static void fl_mask_free_work(struct work_struct *work) 379 { 380 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 381 struct fl_flow_mask, rwork); 382 383 fl_mask_free(mask, true); 384 } 385 386 static void fl_uninit_mask_free_work(struct work_struct *work) 387 { 388 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 389 struct fl_flow_mask, rwork); 390 391 fl_mask_free(mask, false); 392 } 393 394 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 395 { 396 if (!refcount_dec_and_test(&mask->refcnt)) 397 return false; 398 399 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 400 401 spin_lock(&head->masks_lock); 402 list_del_rcu(&mask->list); 403 spin_unlock(&head->masks_lock); 404 405 tcf_queue_work(&mask->rwork, fl_mask_free_work); 406 407 return true; 408 } 409 410 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 411 { 412 /* Flower classifier only changes root pointer during init and destroy. 413 * Users must obtain reference to tcf_proto instance before calling its 414 * API, so tp->root pointer is protected from concurrent call to 415 * fl_destroy() by reference counting. 416 */ 417 return rcu_dereference_raw(tp->root); 418 } 419 420 static void __fl_destroy_filter(struct cls_fl_filter *f) 421 { 422 if (f->needs_tc_skb_ext) 423 tc_skb_ext_tc_disable(); 424 tcf_exts_destroy(&f->exts); 425 tcf_exts_put_net(&f->exts); 426 kfree(f); 427 } 428 429 static void fl_destroy_filter_work(struct work_struct *work) 430 { 431 struct cls_fl_filter *f = container_of(to_rcu_work(work), 432 struct cls_fl_filter, rwork); 433 434 __fl_destroy_filter(f); 435 } 436 437 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 438 bool rtnl_held, struct netlink_ext_ack *extack) 439 { 440 struct tcf_block *block = tp->chain->block; 441 struct flow_cls_offload cls_flower = {}; 442 443 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 444 cls_flower.command = FLOW_CLS_DESTROY; 445 cls_flower.cookie = (unsigned long) f; 446 447 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 448 &f->flags, &f->in_hw_count, rtnl_held); 449 450 } 451 452 static int fl_hw_replace_filter(struct tcf_proto *tp, 453 struct cls_fl_filter *f, bool rtnl_held, 454 struct netlink_ext_ack *extack) 455 { 456 struct tcf_block *block = tp->chain->block; 457 struct flow_cls_offload cls_flower = {}; 458 bool skip_sw = tc_skip_sw(f->flags); 459 int err = 0; 460 461 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 462 if (!cls_flower.rule) 463 return -ENOMEM; 464 465 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 466 cls_flower.command = FLOW_CLS_REPLACE; 467 cls_flower.cookie = (unsigned long) f; 468 cls_flower.rule->match.dissector = &f->mask->dissector; 469 cls_flower.rule->match.mask = &f->mask->key; 470 cls_flower.rule->match.key = &f->mkey; 471 cls_flower.classid = f->res.classid; 472 473 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 474 cls_flower.common.extack); 475 if (err) { 476 kfree(cls_flower.rule); 477 478 return skip_sw ? err : 0; 479 } 480 481 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 482 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 483 tc_cleanup_offload_action(&cls_flower.rule->action); 484 kfree(cls_flower.rule); 485 486 if (err) { 487 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 488 return err; 489 } 490 491 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 492 return -EINVAL; 493 494 return 0; 495 } 496 497 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 498 bool rtnl_held) 499 { 500 struct tcf_block *block = tp->chain->block; 501 struct flow_cls_offload cls_flower = {}; 502 503 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 504 cls_flower.command = FLOW_CLS_STATS; 505 cls_flower.cookie = (unsigned long) f; 506 cls_flower.classid = f->res.classid; 507 508 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 509 rtnl_held); 510 511 tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats); 512 } 513 514 static void __fl_put(struct cls_fl_filter *f) 515 { 516 if (!refcount_dec_and_test(&f->refcnt)) 517 return; 518 519 if (tcf_exts_get_net(&f->exts)) 520 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 521 else 522 __fl_destroy_filter(f); 523 } 524 525 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 526 { 527 struct cls_fl_filter *f; 528 529 rcu_read_lock(); 530 f = idr_find(&head->handle_idr, handle); 531 if (f && !refcount_inc_not_zero(&f->refcnt)) 532 f = NULL; 533 rcu_read_unlock(); 534 535 return f; 536 } 537 538 static struct tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle) 539 { 540 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 541 struct cls_fl_filter *f; 542 543 f = idr_find(&head->handle_idr, handle); 544 return f ? &f->exts : NULL; 545 } 546 547 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 548 bool *last, bool rtnl_held, 549 struct netlink_ext_ack *extack) 550 { 551 struct cls_fl_head *head = fl_head_dereference(tp); 552 553 *last = false; 554 555 spin_lock(&tp->lock); 556 if (f->deleted) { 557 spin_unlock(&tp->lock); 558 return -ENOENT; 559 } 560 561 f->deleted = true; 562 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 563 f->mask->filter_ht_params); 564 idr_remove(&head->handle_idr, f->handle); 565 list_del_rcu(&f->list); 566 spin_unlock(&tp->lock); 567 568 *last = fl_mask_put(head, f->mask); 569 if (!tc_skip_hw(f->flags)) 570 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 571 tcf_unbind_filter(tp, &f->res); 572 __fl_put(f); 573 574 return 0; 575 } 576 577 static void fl_destroy_sleepable(struct work_struct *work) 578 { 579 struct cls_fl_head *head = container_of(to_rcu_work(work), 580 struct cls_fl_head, 581 rwork); 582 583 rhashtable_destroy(&head->ht); 584 kfree(head); 585 module_put(THIS_MODULE); 586 } 587 588 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 589 struct netlink_ext_ack *extack) 590 { 591 struct cls_fl_head *head = fl_head_dereference(tp); 592 struct fl_flow_mask *mask, *next_mask; 593 struct cls_fl_filter *f, *next; 594 bool last; 595 596 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 597 list_for_each_entry_safe(f, next, &mask->filters, list) { 598 __fl_delete(tp, f, &last, rtnl_held, extack); 599 if (last) 600 break; 601 } 602 } 603 idr_destroy(&head->handle_idr); 604 605 __module_get(THIS_MODULE); 606 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 607 } 608 609 static void fl_put(struct tcf_proto *tp, void *arg) 610 { 611 struct cls_fl_filter *f = arg; 612 613 __fl_put(f); 614 } 615 616 static void *fl_get(struct tcf_proto *tp, u32 handle) 617 { 618 struct cls_fl_head *head = fl_head_dereference(tp); 619 620 return __fl_get(head, handle); 621 } 622 623 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 624 [TCA_FLOWER_UNSPEC] = { .strict_start_type = 625 TCA_FLOWER_L2_MISS }, 626 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 627 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 628 .len = IFNAMSIZ }, 629 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 630 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 631 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 632 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 633 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 634 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 635 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 636 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 637 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 638 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 639 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 640 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 641 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 642 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 643 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 644 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 646 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 648 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 649 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 650 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 651 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 652 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 653 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 654 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 655 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 656 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 657 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 658 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 659 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 660 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 661 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 662 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 663 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 664 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 665 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 666 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 667 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 668 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 669 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 670 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 671 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 672 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 673 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 674 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 675 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 676 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 677 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 678 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 679 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 680 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 681 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 682 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 683 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 684 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 685 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 686 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 687 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 688 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 689 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 690 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 691 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 692 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 694 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 695 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 696 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 697 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 698 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 699 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 700 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 701 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 702 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 703 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 704 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 705 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 706 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 707 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 708 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 709 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 710 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 711 [TCA_FLOWER_KEY_CT_STATE] = 712 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 713 [TCA_FLOWER_KEY_CT_STATE_MASK] = 714 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 715 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 716 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 717 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 718 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 719 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 720 .len = 128 / BITS_PER_BYTE }, 721 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 722 .len = 128 / BITS_PER_BYTE }, 723 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 724 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 725 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 726 [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, 727 [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, 728 [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, 729 [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, 730 [TCA_FLOWER_KEY_SPI] = { .type = NLA_U32 }, 731 [TCA_FLOWER_KEY_SPI_MASK] = { .type = NLA_U32 }, 732 [TCA_FLOWER_L2_MISS] = NLA_POLICY_MAX(NLA_U8, 1), 733 [TCA_FLOWER_KEY_CFM] = { .type = NLA_NESTED }, 734 }; 735 736 static const struct nla_policy 737 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 738 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 739 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 740 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 741 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 742 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 743 [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .type = NLA_NESTED }, 744 }; 745 746 static const struct nla_policy 747 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 748 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 749 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 750 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 751 .len = 128 }, 752 }; 753 754 static const struct nla_policy 755 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 756 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 757 }; 758 759 static const struct nla_policy 760 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 761 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 762 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 763 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 764 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 765 }; 766 767 static const struct nla_policy 768 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { 769 [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, 770 [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, 771 }; 772 773 static const struct nla_policy 774 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 775 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 776 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 777 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 778 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 779 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 780 }; 781 782 static const struct nla_policy cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX] = { 783 [TCA_FLOWER_KEY_CFM_MD_LEVEL] = NLA_POLICY_MAX(NLA_U8, 784 FLOW_DIS_CFM_MDL_MAX), 785 [TCA_FLOWER_KEY_CFM_OPCODE] = { .type = NLA_U8 }, 786 }; 787 788 static void fl_set_key_val(struct nlattr **tb, 789 void *val, int val_type, 790 void *mask, int mask_type, int len) 791 { 792 if (!tb[val_type]) 793 return; 794 nla_memcpy(val, tb[val_type], len); 795 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 796 memset(mask, 0xff, len); 797 else 798 nla_memcpy(mask, tb[mask_type], len); 799 } 800 801 static int fl_set_key_spi(struct nlattr **tb, struct fl_flow_key *key, 802 struct fl_flow_key *mask, 803 struct netlink_ext_ack *extack) 804 { 805 if (key->basic.ip_proto != IPPROTO_ESP && 806 key->basic.ip_proto != IPPROTO_AH) { 807 NL_SET_ERR_MSG(extack, 808 "Protocol must be either ESP or AH"); 809 return -EINVAL; 810 } 811 812 fl_set_key_val(tb, &key->ipsec.spi, 813 TCA_FLOWER_KEY_SPI, 814 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 815 sizeof(key->ipsec.spi)); 816 return 0; 817 } 818 819 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 820 struct fl_flow_key *mask, 821 struct netlink_ext_ack *extack) 822 { 823 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 824 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 825 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 826 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 827 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 828 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 829 fl_set_key_val(tb, &key->tp_range.tp_min.src, 830 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 831 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 832 fl_set_key_val(tb, &key->tp_range.tp_max.src, 833 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 834 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 835 836 if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) { 837 NL_SET_ERR_MSG(extack, 838 "Both min and max destination ports must be specified"); 839 return -EINVAL; 840 } 841 if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) { 842 NL_SET_ERR_MSG(extack, 843 "Both min and max source ports must be specified"); 844 return -EINVAL; 845 } 846 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 847 ntohs(key->tp_range.tp_max.dst) <= 848 ntohs(key->tp_range.tp_min.dst)) { 849 NL_SET_ERR_MSG_ATTR(extack, 850 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 851 "Invalid destination port range (min must be strictly smaller than max)"); 852 return -EINVAL; 853 } 854 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 855 ntohs(key->tp_range.tp_max.src) <= 856 ntohs(key->tp_range.tp_min.src)) { 857 NL_SET_ERR_MSG_ATTR(extack, 858 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 859 "Invalid source port range (min must be strictly smaller than max)"); 860 return -EINVAL; 861 } 862 863 return 0; 864 } 865 866 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 867 struct flow_dissector_key_mpls *key_val, 868 struct flow_dissector_key_mpls *key_mask, 869 struct netlink_ext_ack *extack) 870 { 871 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 872 struct flow_dissector_mpls_lse *lse_mask; 873 struct flow_dissector_mpls_lse *lse_val; 874 u8 lse_index; 875 u8 depth; 876 int err; 877 878 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 879 mpls_stack_entry_policy, extack); 880 if (err < 0) 881 return err; 882 883 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 884 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 885 return -EINVAL; 886 } 887 888 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 889 890 /* LSE depth starts at 1, for consistency with terminology used by 891 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 892 */ 893 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 894 NL_SET_ERR_MSG_ATTR(extack, 895 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 896 "Invalid MPLS depth"); 897 return -EINVAL; 898 } 899 lse_index = depth - 1; 900 901 dissector_set_mpls_lse(key_val, lse_index); 902 dissector_set_mpls_lse(key_mask, lse_index); 903 904 lse_val = &key_val->ls[lse_index]; 905 lse_mask = &key_mask->ls[lse_index]; 906 907 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 908 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 909 lse_mask->mpls_ttl = MPLS_TTL_MASK; 910 } 911 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 912 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 913 914 if (bos & ~MPLS_BOS_MASK) { 915 NL_SET_ERR_MSG_ATTR(extack, 916 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 917 "Bottom Of Stack (BOS) must be 0 or 1"); 918 return -EINVAL; 919 } 920 lse_val->mpls_bos = bos; 921 lse_mask->mpls_bos = MPLS_BOS_MASK; 922 } 923 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 924 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 925 926 if (tc & ~MPLS_TC_MASK) { 927 NL_SET_ERR_MSG_ATTR(extack, 928 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 929 "Traffic Class (TC) must be between 0 and 7"); 930 return -EINVAL; 931 } 932 lse_val->mpls_tc = tc; 933 lse_mask->mpls_tc = MPLS_TC_MASK; 934 } 935 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 936 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 937 938 if (label & ~MPLS_LABEL_MASK) { 939 NL_SET_ERR_MSG_ATTR(extack, 940 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 941 "Label must be between 0 and 1048575"); 942 return -EINVAL; 943 } 944 lse_val->mpls_label = label; 945 lse_mask->mpls_label = MPLS_LABEL_MASK; 946 } 947 948 return 0; 949 } 950 951 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 952 struct flow_dissector_key_mpls *key_val, 953 struct flow_dissector_key_mpls *key_mask, 954 struct netlink_ext_ack *extack) 955 { 956 struct nlattr *nla_lse; 957 int rem; 958 int err; 959 960 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 961 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 962 "NLA_F_NESTED is missing"); 963 return -EINVAL; 964 } 965 966 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 967 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 968 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 969 "Invalid MPLS option type"); 970 return -EINVAL; 971 } 972 973 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 974 if (err < 0) 975 return err; 976 } 977 if (rem) { 978 NL_SET_ERR_MSG(extack, 979 "Bytes leftover after parsing MPLS options"); 980 return -EINVAL; 981 } 982 983 return 0; 984 } 985 986 static int fl_set_key_mpls(struct nlattr **tb, 987 struct flow_dissector_key_mpls *key_val, 988 struct flow_dissector_key_mpls *key_mask, 989 struct netlink_ext_ack *extack) 990 { 991 struct flow_dissector_mpls_lse *lse_mask; 992 struct flow_dissector_mpls_lse *lse_val; 993 994 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 995 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 996 tb[TCA_FLOWER_KEY_MPLS_BOS] || 997 tb[TCA_FLOWER_KEY_MPLS_TC] || 998 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 999 NL_SET_ERR_MSG_ATTR(extack, 1000 tb[TCA_FLOWER_KEY_MPLS_OPTS], 1001 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 1002 return -EBADMSG; 1003 } 1004 1005 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 1006 key_val, key_mask, extack); 1007 } 1008 1009 lse_val = &key_val->ls[0]; 1010 lse_mask = &key_mask->ls[0]; 1011 1012 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 1013 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 1014 lse_mask->mpls_ttl = MPLS_TTL_MASK; 1015 dissector_set_mpls_lse(key_val, 0); 1016 dissector_set_mpls_lse(key_mask, 0); 1017 } 1018 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 1019 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 1020 1021 if (bos & ~MPLS_BOS_MASK) { 1022 NL_SET_ERR_MSG_ATTR(extack, 1023 tb[TCA_FLOWER_KEY_MPLS_BOS], 1024 "Bottom Of Stack (BOS) must be 0 or 1"); 1025 return -EINVAL; 1026 } 1027 lse_val->mpls_bos = bos; 1028 lse_mask->mpls_bos = MPLS_BOS_MASK; 1029 dissector_set_mpls_lse(key_val, 0); 1030 dissector_set_mpls_lse(key_mask, 0); 1031 } 1032 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 1033 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 1034 1035 if (tc & ~MPLS_TC_MASK) { 1036 NL_SET_ERR_MSG_ATTR(extack, 1037 tb[TCA_FLOWER_KEY_MPLS_TC], 1038 "Traffic Class (TC) must be between 0 and 7"); 1039 return -EINVAL; 1040 } 1041 lse_val->mpls_tc = tc; 1042 lse_mask->mpls_tc = MPLS_TC_MASK; 1043 dissector_set_mpls_lse(key_val, 0); 1044 dissector_set_mpls_lse(key_mask, 0); 1045 } 1046 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1047 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 1048 1049 if (label & ~MPLS_LABEL_MASK) { 1050 NL_SET_ERR_MSG_ATTR(extack, 1051 tb[TCA_FLOWER_KEY_MPLS_LABEL], 1052 "Label must be between 0 and 1048575"); 1053 return -EINVAL; 1054 } 1055 lse_val->mpls_label = label; 1056 lse_mask->mpls_label = MPLS_LABEL_MASK; 1057 dissector_set_mpls_lse(key_val, 0); 1058 dissector_set_mpls_lse(key_mask, 0); 1059 } 1060 return 0; 1061 } 1062 1063 static void fl_set_key_vlan(struct nlattr **tb, 1064 __be16 ethertype, 1065 int vlan_id_key, int vlan_prio_key, 1066 int vlan_next_eth_type_key, 1067 struct flow_dissector_key_vlan *key_val, 1068 struct flow_dissector_key_vlan *key_mask) 1069 { 1070 #define VLAN_PRIORITY_MASK 0x7 1071 1072 if (tb[vlan_id_key]) { 1073 key_val->vlan_id = 1074 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1075 key_mask->vlan_id = VLAN_VID_MASK; 1076 } 1077 if (tb[vlan_prio_key]) { 1078 key_val->vlan_priority = 1079 nla_get_u8(tb[vlan_prio_key]) & 1080 VLAN_PRIORITY_MASK; 1081 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1082 } 1083 if (ethertype) { 1084 key_val->vlan_tpid = ethertype; 1085 key_mask->vlan_tpid = cpu_to_be16(~0); 1086 } 1087 if (tb[vlan_next_eth_type_key]) { 1088 key_val->vlan_eth_type = 1089 nla_get_be16(tb[vlan_next_eth_type_key]); 1090 key_mask->vlan_eth_type = cpu_to_be16(~0); 1091 } 1092 } 1093 1094 static void fl_set_key_pppoe(struct nlattr **tb, 1095 struct flow_dissector_key_pppoe *key_val, 1096 struct flow_dissector_key_pppoe *key_mask, 1097 struct fl_flow_key *key, 1098 struct fl_flow_key *mask) 1099 { 1100 /* key_val::type must be set to ETH_P_PPP_SES 1101 * because ETH_P_PPP_SES was stored in basic.n_proto 1102 * which might get overwritten by ppp_proto 1103 * or might be set to 0, the role of key_val::type 1104 * is similar to vlan_key::tpid 1105 */ 1106 key_val->type = htons(ETH_P_PPP_SES); 1107 key_mask->type = cpu_to_be16(~0); 1108 1109 if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { 1110 key_val->session_id = 1111 nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); 1112 key_mask->session_id = cpu_to_be16(~0); 1113 } 1114 if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { 1115 key_val->ppp_proto = 1116 nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); 1117 key_mask->ppp_proto = cpu_to_be16(~0); 1118 1119 if (key_val->ppp_proto == htons(PPP_IP)) { 1120 key->basic.n_proto = htons(ETH_P_IP); 1121 mask->basic.n_proto = cpu_to_be16(~0); 1122 } else if (key_val->ppp_proto == htons(PPP_IPV6)) { 1123 key->basic.n_proto = htons(ETH_P_IPV6); 1124 mask->basic.n_proto = cpu_to_be16(~0); 1125 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { 1126 key->basic.n_proto = htons(ETH_P_MPLS_UC); 1127 mask->basic.n_proto = cpu_to_be16(~0); 1128 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { 1129 key->basic.n_proto = htons(ETH_P_MPLS_MC); 1130 mask->basic.n_proto = cpu_to_be16(~0); 1131 } 1132 } else { 1133 key->basic.n_proto = 0; 1134 mask->basic.n_proto = cpu_to_be16(0); 1135 } 1136 } 1137 1138 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1139 u32 *dissector_key, u32 *dissector_mask, 1140 u32 flower_flag_bit, u32 dissector_flag_bit) 1141 { 1142 if (flower_mask & flower_flag_bit) { 1143 *dissector_mask |= dissector_flag_bit; 1144 if (flower_key & flower_flag_bit) 1145 *dissector_key |= dissector_flag_bit; 1146 } 1147 } 1148 1149 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1150 u32 *flags_mask, struct netlink_ext_ack *extack) 1151 { 1152 u32 key, mask; 1153 1154 /* mask is mandatory for flags */ 1155 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1156 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1157 return -EINVAL; 1158 } 1159 1160 key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS])); 1161 mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1162 1163 *flags_key = 0; 1164 *flags_mask = 0; 1165 1166 fl_set_key_flag(key, mask, flags_key, flags_mask, 1167 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1168 fl_set_key_flag(key, mask, flags_key, flags_mask, 1169 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1170 FLOW_DIS_FIRST_FRAG); 1171 1172 return 0; 1173 } 1174 1175 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1176 struct flow_dissector_key_ip *key, 1177 struct flow_dissector_key_ip *mask) 1178 { 1179 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1180 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1181 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1182 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1183 1184 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1185 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1186 } 1187 1188 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1189 int depth, int option_len, 1190 struct netlink_ext_ack *extack) 1191 { 1192 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1193 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1194 struct geneve_opt *opt; 1195 int err, data_len = 0; 1196 1197 if (option_len > sizeof(struct geneve_opt)) 1198 data_len = option_len - sizeof(struct geneve_opt); 1199 1200 if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) 1201 return -ERANGE; 1202 1203 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1204 memset(opt, 0xff, option_len); 1205 opt->length = data_len / 4; 1206 opt->r1 = 0; 1207 opt->r2 = 0; 1208 opt->r3 = 0; 1209 1210 /* If no mask has been prodived we assume an exact match. */ 1211 if (!depth) 1212 return sizeof(struct geneve_opt) + data_len; 1213 1214 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1215 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1216 return -EINVAL; 1217 } 1218 1219 err = nla_parse_nested_deprecated(tb, 1220 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1221 nla, geneve_opt_policy, extack); 1222 if (err < 0) 1223 return err; 1224 1225 /* We are not allowed to omit any of CLASS, TYPE or DATA 1226 * fields from the key. 1227 */ 1228 if (!option_len && 1229 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1230 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1231 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1232 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1233 return -EINVAL; 1234 } 1235 1236 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1237 * for the mask. 1238 */ 1239 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1240 int new_len = key->enc_opts.len; 1241 1242 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1243 data_len = nla_len(data); 1244 if (data_len < 4) { 1245 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1246 return -ERANGE; 1247 } 1248 if (data_len % 4) { 1249 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1250 return -ERANGE; 1251 } 1252 1253 new_len += sizeof(struct geneve_opt) + data_len; 1254 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1255 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1256 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1257 return -ERANGE; 1258 } 1259 opt->length = data_len / 4; 1260 memcpy(opt->opt_data, nla_data(data), data_len); 1261 } 1262 1263 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1264 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1265 opt->opt_class = nla_get_be16(class); 1266 } 1267 1268 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1269 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1270 opt->type = nla_get_u8(type); 1271 } 1272 1273 return sizeof(struct geneve_opt) + data_len; 1274 } 1275 1276 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1277 int depth, int option_len, 1278 struct netlink_ext_ack *extack) 1279 { 1280 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1281 struct vxlan_metadata *md; 1282 int err; 1283 1284 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1285 memset(md, 0xff, sizeof(*md)); 1286 1287 if (!depth) 1288 return sizeof(*md); 1289 1290 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1291 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1292 return -EINVAL; 1293 } 1294 1295 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1296 vxlan_opt_policy, extack); 1297 if (err < 0) 1298 return err; 1299 1300 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1301 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1302 return -EINVAL; 1303 } 1304 1305 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1306 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1307 md->gbp &= VXLAN_GBP_MASK; 1308 } 1309 1310 return sizeof(*md); 1311 } 1312 1313 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1314 int depth, int option_len, 1315 struct netlink_ext_ack *extack) 1316 { 1317 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1318 struct erspan_metadata *md; 1319 int err; 1320 1321 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1322 memset(md, 0xff, sizeof(*md)); 1323 md->version = 1; 1324 1325 if (!depth) 1326 return sizeof(*md); 1327 1328 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1329 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1330 return -EINVAL; 1331 } 1332 1333 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1334 erspan_opt_policy, extack); 1335 if (err < 0) 1336 return err; 1337 1338 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1339 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1340 return -EINVAL; 1341 } 1342 1343 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1344 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1345 1346 if (md->version == 1) { 1347 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1348 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1349 return -EINVAL; 1350 } 1351 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1352 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1353 memset(&md->u, 0x00, sizeof(md->u)); 1354 md->u.index = nla_get_be32(nla); 1355 } 1356 } else if (md->version == 2) { 1357 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1358 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1359 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1360 return -EINVAL; 1361 } 1362 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1363 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1364 md->u.md2.dir = nla_get_u8(nla); 1365 } 1366 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1367 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1368 set_hwid(&md->u.md2, nla_get_u8(nla)); 1369 } 1370 } else { 1371 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1372 return -EINVAL; 1373 } 1374 1375 return sizeof(*md); 1376 } 1377 1378 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1379 int depth, int option_len, 1380 struct netlink_ext_ack *extack) 1381 { 1382 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1383 struct gtp_pdu_session_info *sinfo; 1384 u8 len = key->enc_opts.len; 1385 int err; 1386 1387 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1388 memset(sinfo, 0xff, option_len); 1389 1390 if (!depth) 1391 return sizeof(*sinfo); 1392 1393 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1394 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1395 return -EINVAL; 1396 } 1397 1398 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1399 gtp_opt_policy, extack); 1400 if (err < 0) 1401 return err; 1402 1403 if (!option_len && 1404 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1405 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1406 NL_SET_ERR_MSG_MOD(extack, 1407 "Missing tunnel key gtp option pdu type or qfi"); 1408 return -EINVAL; 1409 } 1410 1411 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1412 sinfo->pdu_type = 1413 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1414 1415 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1416 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1417 1418 return sizeof(*sinfo); 1419 } 1420 1421 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1422 struct fl_flow_key *mask, 1423 struct netlink_ext_ack *extack) 1424 { 1425 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1426 int err, option_len, key_depth, msk_depth = 0; 1427 1428 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1429 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1430 enc_opts_policy, extack); 1431 if (err) 1432 return err; 1433 1434 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1435 1436 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1437 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1438 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1439 enc_opts_policy, extack); 1440 if (err) 1441 return err; 1442 1443 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1444 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1445 if (!nla_ok(nla_opt_msk, msk_depth)) { 1446 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1447 return -EINVAL; 1448 } 1449 } 1450 1451 nla_for_each_attr(nla_opt_key, nla_enc_key, 1452 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1453 switch (nla_type(nla_opt_key)) { 1454 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1455 if (key->enc_opts.dst_opt_type && 1456 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1457 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1458 return -EINVAL; 1459 } 1460 option_len = 0; 1461 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1462 option_len = fl_set_geneve_opt(nla_opt_key, key, 1463 key_depth, option_len, 1464 extack); 1465 if (option_len < 0) 1466 return option_len; 1467 1468 key->enc_opts.len += option_len; 1469 /* At the same time we need to parse through the mask 1470 * in order to verify exact and mask attribute lengths. 1471 */ 1472 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1473 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1474 msk_depth, option_len, 1475 extack); 1476 if (option_len < 0) 1477 return option_len; 1478 1479 mask->enc_opts.len += option_len; 1480 if (key->enc_opts.len != mask->enc_opts.len) { 1481 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1482 return -EINVAL; 1483 } 1484 break; 1485 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1486 if (key->enc_opts.dst_opt_type) { 1487 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1488 return -EINVAL; 1489 } 1490 option_len = 0; 1491 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1492 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1493 key_depth, option_len, 1494 extack); 1495 if (option_len < 0) 1496 return option_len; 1497 1498 key->enc_opts.len += option_len; 1499 /* At the same time we need to parse through the mask 1500 * in order to verify exact and mask attribute lengths. 1501 */ 1502 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1503 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1504 msk_depth, option_len, 1505 extack); 1506 if (option_len < 0) 1507 return option_len; 1508 1509 mask->enc_opts.len += option_len; 1510 if (key->enc_opts.len != mask->enc_opts.len) { 1511 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1512 return -EINVAL; 1513 } 1514 break; 1515 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1516 if (key->enc_opts.dst_opt_type) { 1517 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1518 return -EINVAL; 1519 } 1520 option_len = 0; 1521 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1522 option_len = fl_set_erspan_opt(nla_opt_key, key, 1523 key_depth, option_len, 1524 extack); 1525 if (option_len < 0) 1526 return option_len; 1527 1528 key->enc_opts.len += option_len; 1529 /* At the same time we need to parse through the mask 1530 * in order to verify exact and mask attribute lengths. 1531 */ 1532 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1533 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1534 msk_depth, option_len, 1535 extack); 1536 if (option_len < 0) 1537 return option_len; 1538 1539 mask->enc_opts.len += option_len; 1540 if (key->enc_opts.len != mask->enc_opts.len) { 1541 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1542 return -EINVAL; 1543 } 1544 break; 1545 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1546 if (key->enc_opts.dst_opt_type) { 1547 NL_SET_ERR_MSG_MOD(extack, 1548 "Duplicate type for gtp options"); 1549 return -EINVAL; 1550 } 1551 option_len = 0; 1552 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1553 option_len = fl_set_gtp_opt(nla_opt_key, key, 1554 key_depth, option_len, 1555 extack); 1556 if (option_len < 0) 1557 return option_len; 1558 1559 key->enc_opts.len += option_len; 1560 /* At the same time we need to parse through the mask 1561 * in order to verify exact and mask attribute lengths. 1562 */ 1563 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1564 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1565 msk_depth, option_len, 1566 extack); 1567 if (option_len < 0) 1568 return option_len; 1569 1570 mask->enc_opts.len += option_len; 1571 if (key->enc_opts.len != mask->enc_opts.len) { 1572 NL_SET_ERR_MSG_MOD(extack, 1573 "Key and mask miss aligned"); 1574 return -EINVAL; 1575 } 1576 break; 1577 default: 1578 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1579 return -EINVAL; 1580 } 1581 1582 if (!msk_depth) 1583 continue; 1584 1585 if (!nla_ok(nla_opt_msk, msk_depth)) { 1586 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1587 return -EINVAL; 1588 } 1589 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1590 } 1591 1592 return 0; 1593 } 1594 1595 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1596 struct netlink_ext_ack *extack) 1597 { 1598 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1599 NL_SET_ERR_MSG_ATTR(extack, tb, 1600 "no trk, so no other flag can be set"); 1601 return -EINVAL; 1602 } 1603 1604 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1605 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1606 NL_SET_ERR_MSG_ATTR(extack, tb, 1607 "new and est are mutually exclusive"); 1608 return -EINVAL; 1609 } 1610 1611 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1612 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1613 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1614 NL_SET_ERR_MSG_ATTR(extack, tb, 1615 "when inv is set, only trk may be set"); 1616 return -EINVAL; 1617 } 1618 1619 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1620 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1621 NL_SET_ERR_MSG_ATTR(extack, tb, 1622 "new and rpl are mutually exclusive"); 1623 return -EINVAL; 1624 } 1625 1626 return 0; 1627 } 1628 1629 static int fl_set_key_ct(struct nlattr **tb, 1630 struct flow_dissector_key_ct *key, 1631 struct flow_dissector_key_ct *mask, 1632 struct netlink_ext_ack *extack) 1633 { 1634 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1635 int err; 1636 1637 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1638 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1639 return -EOPNOTSUPP; 1640 } 1641 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1642 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1643 sizeof(key->ct_state)); 1644 1645 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1646 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1647 extack); 1648 if (err) 1649 return err; 1650 1651 } 1652 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1653 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1654 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1655 return -EOPNOTSUPP; 1656 } 1657 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1658 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1659 sizeof(key->ct_zone)); 1660 } 1661 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1662 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1663 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1664 return -EOPNOTSUPP; 1665 } 1666 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1667 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1668 sizeof(key->ct_mark)); 1669 } 1670 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1671 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1672 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1673 return -EOPNOTSUPP; 1674 } 1675 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1676 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1677 sizeof(key->ct_labels)); 1678 } 1679 1680 return 0; 1681 } 1682 1683 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1684 struct fl_flow_key *key, struct fl_flow_key *mask, 1685 int vthresh) 1686 { 1687 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1688 1689 if (!tb) { 1690 *ethertype = 0; 1691 return good_num_of_vlans; 1692 } 1693 1694 *ethertype = nla_get_be16(tb); 1695 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1696 return true; 1697 1698 key->basic.n_proto = *ethertype; 1699 mask->basic.n_proto = cpu_to_be16(~0); 1700 return false; 1701 } 1702 1703 static void fl_set_key_cfm_md_level(struct nlattr **tb, 1704 struct fl_flow_key *key, 1705 struct fl_flow_key *mask, 1706 struct netlink_ext_ack *extack) 1707 { 1708 u8 level; 1709 1710 if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) 1711 return; 1712 1713 level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); 1714 key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); 1715 mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; 1716 } 1717 1718 static void fl_set_key_cfm_opcode(struct nlattr **tb, 1719 struct fl_flow_key *key, 1720 struct fl_flow_key *mask, 1721 struct netlink_ext_ack *extack) 1722 { 1723 fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, 1724 &mask->cfm.opcode, TCA_FLOWER_UNSPEC, 1725 sizeof(key->cfm.opcode)); 1726 } 1727 1728 static int fl_set_key_cfm(struct nlattr **tb, 1729 struct fl_flow_key *key, 1730 struct fl_flow_key *mask, 1731 struct netlink_ext_ack *extack) 1732 { 1733 struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX]; 1734 int err; 1735 1736 if (!tb[TCA_FLOWER_KEY_CFM]) 1737 return 0; 1738 1739 err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, 1740 tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); 1741 if (err < 0) 1742 return err; 1743 1744 fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); 1745 fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 1746 1747 return 0; 1748 } 1749 1750 static int fl_set_key(struct net *net, struct nlattr **tb, 1751 struct fl_flow_key *key, struct fl_flow_key *mask, 1752 struct netlink_ext_ack *extack) 1753 { 1754 __be16 ethertype; 1755 int ret = 0; 1756 1757 if (tb[TCA_FLOWER_INDEV]) { 1758 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1759 if (err < 0) 1760 return err; 1761 key->meta.ingress_ifindex = err; 1762 mask->meta.ingress_ifindex = 0xffffffff; 1763 } 1764 1765 fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, 1766 &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, 1767 sizeof(key->meta.l2_miss)); 1768 1769 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1770 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1771 sizeof(key->eth.dst)); 1772 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1773 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1774 sizeof(key->eth.src)); 1775 fl_set_key_val(tb, &key->num_of_vlans, 1776 TCA_FLOWER_KEY_NUM_OF_VLANS, 1777 &mask->num_of_vlans, 1778 TCA_FLOWER_UNSPEC, 1779 sizeof(key->num_of_vlans)); 1780 1781 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1782 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1783 TCA_FLOWER_KEY_VLAN_PRIO, 1784 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1785 &key->vlan, &mask->vlan); 1786 1787 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1788 ðertype, key, mask, 1)) { 1789 fl_set_key_vlan(tb, ethertype, 1790 TCA_FLOWER_KEY_CVLAN_ID, 1791 TCA_FLOWER_KEY_CVLAN_PRIO, 1792 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1793 &key->cvlan, &mask->cvlan); 1794 fl_set_key_val(tb, &key->basic.n_proto, 1795 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1796 &mask->basic.n_proto, 1797 TCA_FLOWER_UNSPEC, 1798 sizeof(key->basic.n_proto)); 1799 } 1800 } 1801 1802 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1803 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1804 1805 if (key->basic.n_proto == htons(ETH_P_IP) || 1806 key->basic.n_proto == htons(ETH_P_IPV6)) { 1807 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1808 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1809 sizeof(key->basic.ip_proto)); 1810 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1811 } 1812 1813 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1814 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1815 mask->control.addr_type = ~0; 1816 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1817 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1818 sizeof(key->ipv4.src)); 1819 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1820 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1821 sizeof(key->ipv4.dst)); 1822 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1823 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1824 mask->control.addr_type = ~0; 1825 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1826 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1827 sizeof(key->ipv6.src)); 1828 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1829 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1830 sizeof(key->ipv6.dst)); 1831 } 1832 1833 if (key->basic.ip_proto == IPPROTO_TCP) { 1834 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1835 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1836 sizeof(key->tp.src)); 1837 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1838 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1839 sizeof(key->tp.dst)); 1840 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1841 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1842 sizeof(key->tcp.flags)); 1843 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1844 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1845 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1846 sizeof(key->tp.src)); 1847 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1848 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1849 sizeof(key->tp.dst)); 1850 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1851 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1852 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1853 sizeof(key->tp.src)); 1854 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1855 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1856 sizeof(key->tp.dst)); 1857 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1858 key->basic.ip_proto == IPPROTO_ICMP) { 1859 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1860 &mask->icmp.type, 1861 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1862 sizeof(key->icmp.type)); 1863 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1864 &mask->icmp.code, 1865 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1866 sizeof(key->icmp.code)); 1867 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1868 key->basic.ip_proto == IPPROTO_ICMPV6) { 1869 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1870 &mask->icmp.type, 1871 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1872 sizeof(key->icmp.type)); 1873 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1874 &mask->icmp.code, 1875 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1876 sizeof(key->icmp.code)); 1877 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1878 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1879 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1880 if (ret) 1881 return ret; 1882 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1883 key->basic.n_proto == htons(ETH_P_RARP)) { 1884 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1885 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1886 sizeof(key->arp.sip)); 1887 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1888 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1889 sizeof(key->arp.tip)); 1890 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1891 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1892 sizeof(key->arp.op)); 1893 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1894 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1895 sizeof(key->arp.sha)); 1896 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1897 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1898 sizeof(key->arp.tha)); 1899 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 1900 fl_set_key_val(tb, &key->l2tpv3.session_id, 1901 TCA_FLOWER_KEY_L2TPV3_SID, 1902 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 1903 sizeof(key->l2tpv3.session_id)); 1904 } else if (key->basic.n_proto == htons(ETH_P_CFM)) { 1905 ret = fl_set_key_cfm(tb, key, mask, extack); 1906 if (ret) 1907 return ret; 1908 } 1909 1910 if (key->basic.ip_proto == IPPROTO_TCP || 1911 key->basic.ip_proto == IPPROTO_UDP || 1912 key->basic.ip_proto == IPPROTO_SCTP) { 1913 ret = fl_set_key_port_range(tb, key, mask, extack); 1914 if (ret) 1915 return ret; 1916 } 1917 1918 if (tb[TCA_FLOWER_KEY_SPI]) { 1919 ret = fl_set_key_spi(tb, key, mask, extack); 1920 if (ret) 1921 return ret; 1922 } 1923 1924 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1925 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1926 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1927 mask->enc_control.addr_type = ~0; 1928 fl_set_key_val(tb, &key->enc_ipv4.src, 1929 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1930 &mask->enc_ipv4.src, 1931 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1932 sizeof(key->enc_ipv4.src)); 1933 fl_set_key_val(tb, &key->enc_ipv4.dst, 1934 TCA_FLOWER_KEY_ENC_IPV4_DST, 1935 &mask->enc_ipv4.dst, 1936 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1937 sizeof(key->enc_ipv4.dst)); 1938 } 1939 1940 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1941 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1942 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1943 mask->enc_control.addr_type = ~0; 1944 fl_set_key_val(tb, &key->enc_ipv6.src, 1945 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1946 &mask->enc_ipv6.src, 1947 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1948 sizeof(key->enc_ipv6.src)); 1949 fl_set_key_val(tb, &key->enc_ipv6.dst, 1950 TCA_FLOWER_KEY_ENC_IPV6_DST, 1951 &mask->enc_ipv6.dst, 1952 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1953 sizeof(key->enc_ipv6.dst)); 1954 } 1955 1956 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1957 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1958 sizeof(key->enc_key_id.keyid)); 1959 1960 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1961 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1962 sizeof(key->enc_tp.src)); 1963 1964 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1965 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1966 sizeof(key->enc_tp.dst)); 1967 1968 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1969 1970 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1971 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1972 sizeof(key->hash.hash)); 1973 1974 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1975 ret = fl_set_enc_opt(tb, key, mask, extack); 1976 if (ret) 1977 return ret; 1978 } 1979 1980 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1981 if (ret) 1982 return ret; 1983 1984 if (tb[TCA_FLOWER_KEY_FLAGS]) 1985 ret = fl_set_key_flags(tb, &key->control.flags, 1986 &mask->control.flags, extack); 1987 1988 return ret; 1989 } 1990 1991 static void fl_mask_copy(struct fl_flow_mask *dst, 1992 struct fl_flow_mask *src) 1993 { 1994 const void *psrc = fl_key_get_start(&src->key, src); 1995 void *pdst = fl_key_get_start(&dst->key, src); 1996 1997 memcpy(pdst, psrc, fl_mask_range(src)); 1998 dst->range = src->range; 1999 } 2000 2001 static const struct rhashtable_params fl_ht_params = { 2002 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 2003 .head_offset = offsetof(struct cls_fl_filter, ht_node), 2004 .automatic_shrinking = true, 2005 }; 2006 2007 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 2008 { 2009 mask->filter_ht_params = fl_ht_params; 2010 mask->filter_ht_params.key_len = fl_mask_range(mask); 2011 mask->filter_ht_params.key_offset += mask->range.start; 2012 2013 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 2014 } 2015 2016 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 2017 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 2018 2019 #define FL_KEY_IS_MASKED(mask, member) \ 2020 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 2021 0, FL_KEY_MEMBER_SIZE(member)) \ 2022 2023 #define FL_KEY_SET(keys, cnt, id, member) \ 2024 do { \ 2025 keys[cnt].key_id = id; \ 2026 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 2027 cnt++; \ 2028 } while(0); 2029 2030 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 2031 do { \ 2032 if (FL_KEY_IS_MASKED(mask, member)) \ 2033 FL_KEY_SET(keys, cnt, id, member); \ 2034 } while(0); 2035 2036 static void fl_init_dissector(struct flow_dissector *dissector, 2037 struct fl_flow_key *mask) 2038 { 2039 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 2040 size_t cnt = 0; 2041 2042 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2043 FLOW_DISSECTOR_KEY_META, meta); 2044 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 2045 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 2046 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2047 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 2048 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2049 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 2050 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2051 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 2052 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2053 FLOW_DISSECTOR_KEY_PORTS, tp); 2054 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2055 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 2056 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2057 FLOW_DISSECTOR_KEY_IP, ip); 2058 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2059 FLOW_DISSECTOR_KEY_TCP, tcp); 2060 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2061 FLOW_DISSECTOR_KEY_ICMP, icmp); 2062 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2063 FLOW_DISSECTOR_KEY_ARP, arp); 2064 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2065 FLOW_DISSECTOR_KEY_MPLS, mpls); 2066 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2067 FLOW_DISSECTOR_KEY_VLAN, vlan); 2068 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2069 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 2070 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2071 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 2072 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2073 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 2074 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2075 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 2076 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 2077 FL_KEY_IS_MASKED(mask, enc_ipv6)) 2078 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 2079 enc_control); 2080 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2081 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 2082 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2083 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 2084 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2085 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 2086 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2087 FLOW_DISSECTOR_KEY_CT, ct); 2088 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2089 FLOW_DISSECTOR_KEY_HASH, hash); 2090 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2091 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 2092 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2093 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 2094 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2095 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 2096 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2097 FLOW_DISSECTOR_KEY_IPSEC, ipsec); 2098 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2099 FLOW_DISSECTOR_KEY_CFM, cfm); 2100 2101 skb_flow_dissector_init(dissector, keys, cnt); 2102 } 2103 2104 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 2105 struct fl_flow_mask *mask) 2106 { 2107 struct fl_flow_mask *newmask; 2108 int err; 2109 2110 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 2111 if (!newmask) 2112 return ERR_PTR(-ENOMEM); 2113 2114 fl_mask_copy(newmask, mask); 2115 2116 if ((newmask->key.tp_range.tp_min.dst && 2117 newmask->key.tp_range.tp_max.dst) || 2118 (newmask->key.tp_range.tp_min.src && 2119 newmask->key.tp_range.tp_max.src)) 2120 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2121 2122 err = fl_init_mask_hashtable(newmask); 2123 if (err) 2124 goto errout_free; 2125 2126 fl_init_dissector(&newmask->dissector, &newmask->key); 2127 2128 INIT_LIST_HEAD_RCU(&newmask->filters); 2129 2130 refcount_set(&newmask->refcnt, 1); 2131 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2132 &newmask->ht_node, mask_ht_params); 2133 if (err) 2134 goto errout_destroy; 2135 2136 spin_lock(&head->masks_lock); 2137 list_add_tail_rcu(&newmask->list, &head->masks); 2138 spin_unlock(&head->masks_lock); 2139 2140 return newmask; 2141 2142 errout_destroy: 2143 rhashtable_destroy(&newmask->ht); 2144 errout_free: 2145 kfree(newmask); 2146 2147 return ERR_PTR(err); 2148 } 2149 2150 static int fl_check_assign_mask(struct cls_fl_head *head, 2151 struct cls_fl_filter *fnew, 2152 struct cls_fl_filter *fold, 2153 struct fl_flow_mask *mask) 2154 { 2155 struct fl_flow_mask *newmask; 2156 int ret = 0; 2157 2158 rcu_read_lock(); 2159 2160 /* Insert mask as temporary node to prevent concurrent creation of mask 2161 * with same key. Any concurrent lookups with same key will return 2162 * -EAGAIN because mask's refcnt is zero. 2163 */ 2164 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2165 &mask->ht_node, 2166 mask_ht_params); 2167 if (!fnew->mask) { 2168 rcu_read_unlock(); 2169 2170 if (fold) { 2171 ret = -EINVAL; 2172 goto errout_cleanup; 2173 } 2174 2175 newmask = fl_create_new_mask(head, mask); 2176 if (IS_ERR(newmask)) { 2177 ret = PTR_ERR(newmask); 2178 goto errout_cleanup; 2179 } 2180 2181 fnew->mask = newmask; 2182 return 0; 2183 } else if (IS_ERR(fnew->mask)) { 2184 ret = PTR_ERR(fnew->mask); 2185 } else if (fold && fold->mask != fnew->mask) { 2186 ret = -EINVAL; 2187 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2188 /* Mask was deleted concurrently, try again */ 2189 ret = -EAGAIN; 2190 } 2191 rcu_read_unlock(); 2192 return ret; 2193 2194 errout_cleanup: 2195 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2196 mask_ht_params); 2197 return ret; 2198 } 2199 2200 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) 2201 { 2202 return mask->meta.l2_miss; 2203 } 2204 2205 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2206 struct cls_fl_filter *fold, 2207 bool *in_ht) 2208 { 2209 struct fl_flow_mask *mask = fnew->mask; 2210 int err; 2211 2212 err = rhashtable_lookup_insert_fast(&mask->ht, 2213 &fnew->ht_node, 2214 mask->filter_ht_params); 2215 if (err) { 2216 *in_ht = false; 2217 /* It is okay if filter with same key exists when 2218 * overwriting. 2219 */ 2220 return fold && err == -EEXIST ? 0 : err; 2221 } 2222 2223 *in_ht = true; 2224 return 0; 2225 } 2226 2227 static int fl_change(struct net *net, struct sk_buff *in_skb, 2228 struct tcf_proto *tp, unsigned long base, 2229 u32 handle, struct nlattr **tca, 2230 void **arg, u32 flags, 2231 struct netlink_ext_ack *extack) 2232 { 2233 struct cls_fl_head *head = fl_head_dereference(tp); 2234 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2235 struct cls_fl_filter *fold = *arg; 2236 bool bound_to_filter = false; 2237 struct cls_fl_filter *fnew; 2238 struct fl_flow_mask *mask; 2239 struct nlattr **tb; 2240 bool in_ht; 2241 int err; 2242 2243 if (!tca[TCA_OPTIONS]) { 2244 err = -EINVAL; 2245 goto errout_fold; 2246 } 2247 2248 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2249 if (!mask) { 2250 err = -ENOBUFS; 2251 goto errout_fold; 2252 } 2253 2254 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2255 if (!tb) { 2256 err = -ENOBUFS; 2257 goto errout_mask_alloc; 2258 } 2259 2260 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2261 tca[TCA_OPTIONS], fl_policy, NULL); 2262 if (err < 0) 2263 goto errout_tb; 2264 2265 if (fold && handle && fold->handle != handle) { 2266 err = -EINVAL; 2267 goto errout_tb; 2268 } 2269 2270 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2271 if (!fnew) { 2272 err = -ENOBUFS; 2273 goto errout_tb; 2274 } 2275 INIT_LIST_HEAD(&fnew->hw_list); 2276 refcount_set(&fnew->refcnt, 1); 2277 2278 if (tb[TCA_FLOWER_FLAGS]) { 2279 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2280 2281 if (!tc_flags_valid(fnew->flags)) { 2282 kfree(fnew); 2283 err = -EINVAL; 2284 goto errout_tb; 2285 } 2286 } 2287 2288 if (!fold) { 2289 spin_lock(&tp->lock); 2290 if (!handle) { 2291 handle = 1; 2292 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2293 INT_MAX, GFP_ATOMIC); 2294 } else { 2295 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2296 handle, GFP_ATOMIC); 2297 2298 /* Filter with specified handle was concurrently 2299 * inserted after initial check in cls_api. This is not 2300 * necessarily an error if NLM_F_EXCL is not set in 2301 * message flags. Returning EAGAIN will cause cls_api to 2302 * try to update concurrently inserted rule. 2303 */ 2304 if (err == -ENOSPC) 2305 err = -EAGAIN; 2306 } 2307 spin_unlock(&tp->lock); 2308 2309 if (err) { 2310 kfree(fnew); 2311 goto errout_tb; 2312 } 2313 } 2314 fnew->handle = handle; 2315 2316 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2317 !tc_skip_hw(fnew->flags)); 2318 if (err < 0) 2319 goto errout_idr; 2320 2321 err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], 2322 &fnew->exts, flags, fnew->flags, 2323 extack); 2324 if (err < 0) 2325 goto errout_idr; 2326 2327 if (tb[TCA_FLOWER_CLASSID]) { 2328 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2329 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2330 rtnl_lock(); 2331 tcf_bind_filter(tp, &fnew->res, base); 2332 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2333 rtnl_unlock(); 2334 bound_to_filter = true; 2335 } 2336 2337 err = fl_set_key(net, tb, &fnew->key, &mask->key, extack); 2338 if (err) 2339 goto unbind_filter; 2340 2341 fl_mask_update_range(mask); 2342 fl_set_masked_key(&fnew->mkey, &fnew->key, mask); 2343 2344 if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { 2345 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2346 err = -EINVAL; 2347 goto unbind_filter; 2348 } 2349 2350 /* Enable tc skb extension if filter matches on data extracted from 2351 * this extension. 2352 */ 2353 if (fl_needs_tc_skb_ext(&mask->key)) { 2354 fnew->needs_tc_skb_ext = 1; 2355 tc_skb_ext_tc_enable(); 2356 } 2357 2358 err = fl_check_assign_mask(head, fnew, fold, mask); 2359 if (err) 2360 goto unbind_filter; 2361 2362 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2363 if (err) 2364 goto errout_mask; 2365 2366 if (!tc_skip_hw(fnew->flags)) { 2367 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2368 if (err) 2369 goto errout_ht; 2370 } 2371 2372 if (!tc_in_hw(fnew->flags)) 2373 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2374 2375 spin_lock(&tp->lock); 2376 2377 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2378 * proto again or create new one, if necessary. 2379 */ 2380 if (tp->deleting) { 2381 err = -EAGAIN; 2382 goto errout_hw; 2383 } 2384 2385 if (fold) { 2386 /* Fold filter was deleted concurrently. Retry lookup. */ 2387 if (fold->deleted) { 2388 err = -EAGAIN; 2389 goto errout_hw; 2390 } 2391 2392 fnew->handle = handle; 2393 2394 if (!in_ht) { 2395 struct rhashtable_params params = 2396 fnew->mask->filter_ht_params; 2397 2398 err = rhashtable_insert_fast(&fnew->mask->ht, 2399 &fnew->ht_node, 2400 params); 2401 if (err) 2402 goto errout_hw; 2403 in_ht = true; 2404 } 2405 2406 refcount_inc(&fnew->refcnt); 2407 rhashtable_remove_fast(&fold->mask->ht, 2408 &fold->ht_node, 2409 fold->mask->filter_ht_params); 2410 idr_replace(&head->handle_idr, fnew, fnew->handle); 2411 list_replace_rcu(&fold->list, &fnew->list); 2412 fold->deleted = true; 2413 2414 spin_unlock(&tp->lock); 2415 2416 fl_mask_put(head, fold->mask); 2417 if (!tc_skip_hw(fold->flags)) 2418 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2419 tcf_unbind_filter(tp, &fold->res); 2420 /* Caller holds reference to fold, so refcnt is always > 0 2421 * after this. 2422 */ 2423 refcount_dec(&fold->refcnt); 2424 __fl_put(fold); 2425 } else { 2426 idr_replace(&head->handle_idr, fnew, fnew->handle); 2427 2428 refcount_inc(&fnew->refcnt); 2429 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2430 spin_unlock(&tp->lock); 2431 } 2432 2433 *arg = fnew; 2434 2435 kfree(tb); 2436 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2437 return 0; 2438 2439 errout_ht: 2440 spin_lock(&tp->lock); 2441 errout_hw: 2442 fnew->deleted = true; 2443 spin_unlock(&tp->lock); 2444 if (!tc_skip_hw(fnew->flags)) 2445 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2446 if (in_ht) 2447 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2448 fnew->mask->filter_ht_params); 2449 errout_mask: 2450 fl_mask_put(head, fnew->mask); 2451 2452 unbind_filter: 2453 if (bound_to_filter) { 2454 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2455 rtnl_lock(); 2456 tcf_unbind_filter(tp, &fnew->res); 2457 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2458 rtnl_unlock(); 2459 } 2460 2461 errout_idr: 2462 if (!fold) 2463 idr_remove(&head->handle_idr, fnew->handle); 2464 __fl_put(fnew); 2465 errout_tb: 2466 kfree(tb); 2467 errout_mask_alloc: 2468 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2469 errout_fold: 2470 if (fold) 2471 __fl_put(fold); 2472 return err; 2473 } 2474 2475 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2476 bool rtnl_held, struct netlink_ext_ack *extack) 2477 { 2478 struct cls_fl_head *head = fl_head_dereference(tp); 2479 struct cls_fl_filter *f = arg; 2480 bool last_on_mask; 2481 int err = 0; 2482 2483 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2484 *last = list_empty(&head->masks); 2485 __fl_put(f); 2486 2487 return err; 2488 } 2489 2490 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2491 bool rtnl_held) 2492 { 2493 struct cls_fl_head *head = fl_head_dereference(tp); 2494 unsigned long id = arg->cookie, tmp; 2495 struct cls_fl_filter *f; 2496 2497 arg->count = arg->skip; 2498 2499 rcu_read_lock(); 2500 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2501 /* don't return filters that are being deleted */ 2502 if (!f || !refcount_inc_not_zero(&f->refcnt)) 2503 continue; 2504 rcu_read_unlock(); 2505 2506 if (arg->fn(tp, f, arg) < 0) { 2507 __fl_put(f); 2508 arg->stop = 1; 2509 rcu_read_lock(); 2510 break; 2511 } 2512 __fl_put(f); 2513 arg->count++; 2514 rcu_read_lock(); 2515 } 2516 rcu_read_unlock(); 2517 arg->cookie = id; 2518 } 2519 2520 static struct cls_fl_filter * 2521 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2522 { 2523 struct cls_fl_head *head = fl_head_dereference(tp); 2524 2525 spin_lock(&tp->lock); 2526 if (list_empty(&head->hw_filters)) { 2527 spin_unlock(&tp->lock); 2528 return NULL; 2529 } 2530 2531 if (!f) 2532 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2533 hw_list); 2534 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2535 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2536 spin_unlock(&tp->lock); 2537 return f; 2538 } 2539 } 2540 2541 spin_unlock(&tp->lock); 2542 return NULL; 2543 } 2544 2545 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2546 void *cb_priv, struct netlink_ext_ack *extack) 2547 { 2548 struct tcf_block *block = tp->chain->block; 2549 struct flow_cls_offload cls_flower = {}; 2550 struct cls_fl_filter *f = NULL; 2551 int err; 2552 2553 /* hw_filters list can only be changed by hw offload functions after 2554 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2555 * iterating it. 2556 */ 2557 ASSERT_RTNL(); 2558 2559 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2560 cls_flower.rule = 2561 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2562 if (!cls_flower.rule) { 2563 __fl_put(f); 2564 return -ENOMEM; 2565 } 2566 2567 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2568 extack); 2569 cls_flower.command = add ? 2570 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2571 cls_flower.cookie = (unsigned long)f; 2572 cls_flower.rule->match.dissector = &f->mask->dissector; 2573 cls_flower.rule->match.mask = &f->mask->key; 2574 cls_flower.rule->match.key = &f->mkey; 2575 2576 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2577 cls_flower.common.extack); 2578 if (err) { 2579 kfree(cls_flower.rule); 2580 if (tc_skip_sw(f->flags)) { 2581 __fl_put(f); 2582 return err; 2583 } 2584 goto next_flow; 2585 } 2586 2587 cls_flower.classid = f->res.classid; 2588 2589 err = tc_setup_cb_reoffload(block, tp, add, cb, 2590 TC_SETUP_CLSFLOWER, &cls_flower, 2591 cb_priv, &f->flags, 2592 &f->in_hw_count); 2593 tc_cleanup_offload_action(&cls_flower.rule->action); 2594 kfree(cls_flower.rule); 2595 2596 if (err) { 2597 __fl_put(f); 2598 return err; 2599 } 2600 next_flow: 2601 __fl_put(f); 2602 } 2603 2604 return 0; 2605 } 2606 2607 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2608 { 2609 struct flow_cls_offload *cls_flower = type_data; 2610 struct cls_fl_filter *f = 2611 (struct cls_fl_filter *) cls_flower->cookie; 2612 struct cls_fl_head *head = fl_head_dereference(tp); 2613 2614 spin_lock(&tp->lock); 2615 list_add(&f->hw_list, &head->hw_filters); 2616 spin_unlock(&tp->lock); 2617 } 2618 2619 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2620 { 2621 struct flow_cls_offload *cls_flower = type_data; 2622 struct cls_fl_filter *f = 2623 (struct cls_fl_filter *) cls_flower->cookie; 2624 2625 spin_lock(&tp->lock); 2626 if (!list_empty(&f->hw_list)) 2627 list_del_init(&f->hw_list); 2628 spin_unlock(&tp->lock); 2629 } 2630 2631 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2632 struct fl_flow_tmplt *tmplt) 2633 { 2634 struct flow_cls_offload cls_flower = {}; 2635 struct tcf_block *block = chain->block; 2636 2637 cls_flower.rule = flow_rule_alloc(0); 2638 if (!cls_flower.rule) 2639 return -ENOMEM; 2640 2641 cls_flower.common.chain_index = chain->index; 2642 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2643 cls_flower.cookie = (unsigned long) tmplt; 2644 cls_flower.rule->match.dissector = &tmplt->dissector; 2645 cls_flower.rule->match.mask = &tmplt->mask; 2646 cls_flower.rule->match.key = &tmplt->dummy_key; 2647 2648 /* We don't care if driver (any of them) fails to handle this 2649 * call. It serves just as a hint for it. 2650 */ 2651 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2652 kfree(cls_flower.rule); 2653 2654 return 0; 2655 } 2656 2657 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2658 struct fl_flow_tmplt *tmplt) 2659 { 2660 struct flow_cls_offload cls_flower = {}; 2661 struct tcf_block *block = chain->block; 2662 2663 cls_flower.common.chain_index = chain->index; 2664 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2665 cls_flower.cookie = (unsigned long) tmplt; 2666 2667 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2668 } 2669 2670 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2671 struct nlattr **tca, 2672 struct netlink_ext_ack *extack) 2673 { 2674 struct fl_flow_tmplt *tmplt; 2675 struct nlattr **tb; 2676 int err; 2677 2678 if (!tca[TCA_OPTIONS]) 2679 return ERR_PTR(-EINVAL); 2680 2681 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2682 if (!tb) 2683 return ERR_PTR(-ENOBUFS); 2684 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2685 tca[TCA_OPTIONS], fl_policy, NULL); 2686 if (err) 2687 goto errout_tb; 2688 2689 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2690 if (!tmplt) { 2691 err = -ENOMEM; 2692 goto errout_tb; 2693 } 2694 tmplt->chain = chain; 2695 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2696 if (err) 2697 goto errout_tmplt; 2698 2699 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2700 2701 err = fl_hw_create_tmplt(chain, tmplt); 2702 if (err) 2703 goto errout_tmplt; 2704 2705 kfree(tb); 2706 return tmplt; 2707 2708 errout_tmplt: 2709 kfree(tmplt); 2710 errout_tb: 2711 kfree(tb); 2712 return ERR_PTR(err); 2713 } 2714 2715 static void fl_tmplt_destroy(void *tmplt_priv) 2716 { 2717 struct fl_flow_tmplt *tmplt = tmplt_priv; 2718 2719 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2720 kfree(tmplt); 2721 } 2722 2723 static int fl_dump_key_val(struct sk_buff *skb, 2724 void *val, int val_type, 2725 void *mask, int mask_type, int len) 2726 { 2727 int err; 2728 2729 if (!memchr_inv(mask, 0, len)) 2730 return 0; 2731 err = nla_put(skb, val_type, len, val); 2732 if (err) 2733 return err; 2734 if (mask_type != TCA_FLOWER_UNSPEC) { 2735 err = nla_put(skb, mask_type, len, mask); 2736 if (err) 2737 return err; 2738 } 2739 return 0; 2740 } 2741 2742 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2743 struct fl_flow_key *mask) 2744 { 2745 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2746 TCA_FLOWER_KEY_PORT_DST_MIN, 2747 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2748 sizeof(key->tp_range.tp_min.dst)) || 2749 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2750 TCA_FLOWER_KEY_PORT_DST_MAX, 2751 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2752 sizeof(key->tp_range.tp_max.dst)) || 2753 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2754 TCA_FLOWER_KEY_PORT_SRC_MIN, 2755 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2756 sizeof(key->tp_range.tp_min.src)) || 2757 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2758 TCA_FLOWER_KEY_PORT_SRC_MAX, 2759 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2760 sizeof(key->tp_range.tp_max.src))) 2761 return -1; 2762 2763 return 0; 2764 } 2765 2766 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2767 struct flow_dissector_key_mpls *mpls_key, 2768 struct flow_dissector_key_mpls *mpls_mask, 2769 u8 lse_index) 2770 { 2771 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2772 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2773 int err; 2774 2775 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2776 lse_index + 1); 2777 if (err) 2778 return err; 2779 2780 if (lse_mask->mpls_ttl) { 2781 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2782 lse_key->mpls_ttl); 2783 if (err) 2784 return err; 2785 } 2786 if (lse_mask->mpls_bos) { 2787 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2788 lse_key->mpls_bos); 2789 if (err) 2790 return err; 2791 } 2792 if (lse_mask->mpls_tc) { 2793 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2794 lse_key->mpls_tc); 2795 if (err) 2796 return err; 2797 } 2798 if (lse_mask->mpls_label) { 2799 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2800 lse_key->mpls_label); 2801 if (err) 2802 return err; 2803 } 2804 2805 return 0; 2806 } 2807 2808 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2809 struct flow_dissector_key_mpls *mpls_key, 2810 struct flow_dissector_key_mpls *mpls_mask) 2811 { 2812 struct nlattr *opts; 2813 struct nlattr *lse; 2814 u8 lse_index; 2815 int err; 2816 2817 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2818 if (!opts) 2819 return -EMSGSIZE; 2820 2821 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2822 if (!(mpls_mask->used_lses & 1 << lse_index)) 2823 continue; 2824 2825 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2826 if (!lse) { 2827 err = -EMSGSIZE; 2828 goto err_opts; 2829 } 2830 2831 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2832 lse_index); 2833 if (err) 2834 goto err_opts_lse; 2835 nla_nest_end(skb, lse); 2836 } 2837 nla_nest_end(skb, opts); 2838 2839 return 0; 2840 2841 err_opts_lse: 2842 nla_nest_cancel(skb, lse); 2843 err_opts: 2844 nla_nest_cancel(skb, opts); 2845 2846 return err; 2847 } 2848 2849 static int fl_dump_key_mpls(struct sk_buff *skb, 2850 struct flow_dissector_key_mpls *mpls_key, 2851 struct flow_dissector_key_mpls *mpls_mask) 2852 { 2853 struct flow_dissector_mpls_lse *lse_mask; 2854 struct flow_dissector_mpls_lse *lse_key; 2855 int err; 2856 2857 if (!mpls_mask->used_lses) 2858 return 0; 2859 2860 lse_mask = &mpls_mask->ls[0]; 2861 lse_key = &mpls_key->ls[0]; 2862 2863 /* For backward compatibility, don't use the MPLS nested attributes if 2864 * the rule can be expressed using the old attributes. 2865 */ 2866 if (mpls_mask->used_lses & ~1 || 2867 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2868 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2869 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2870 2871 if (lse_mask->mpls_ttl) { 2872 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2873 lse_key->mpls_ttl); 2874 if (err) 2875 return err; 2876 } 2877 if (lse_mask->mpls_tc) { 2878 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2879 lse_key->mpls_tc); 2880 if (err) 2881 return err; 2882 } 2883 if (lse_mask->mpls_label) { 2884 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2885 lse_key->mpls_label); 2886 if (err) 2887 return err; 2888 } 2889 if (lse_mask->mpls_bos) { 2890 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2891 lse_key->mpls_bos); 2892 if (err) 2893 return err; 2894 } 2895 return 0; 2896 } 2897 2898 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2899 struct flow_dissector_key_ip *key, 2900 struct flow_dissector_key_ip *mask) 2901 { 2902 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2903 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2904 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2905 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2906 2907 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2908 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2909 return -1; 2910 2911 return 0; 2912 } 2913 2914 static int fl_dump_key_vlan(struct sk_buff *skb, 2915 int vlan_id_key, int vlan_prio_key, 2916 struct flow_dissector_key_vlan *vlan_key, 2917 struct flow_dissector_key_vlan *vlan_mask) 2918 { 2919 int err; 2920 2921 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2922 return 0; 2923 if (vlan_mask->vlan_id) { 2924 err = nla_put_u16(skb, vlan_id_key, 2925 vlan_key->vlan_id); 2926 if (err) 2927 return err; 2928 } 2929 if (vlan_mask->vlan_priority) { 2930 err = nla_put_u8(skb, vlan_prio_key, 2931 vlan_key->vlan_priority); 2932 if (err) 2933 return err; 2934 } 2935 return 0; 2936 } 2937 2938 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2939 u32 *flower_key, u32 *flower_mask, 2940 u32 flower_flag_bit, u32 dissector_flag_bit) 2941 { 2942 if (dissector_mask & dissector_flag_bit) { 2943 *flower_mask |= flower_flag_bit; 2944 if (dissector_key & dissector_flag_bit) 2945 *flower_key |= flower_flag_bit; 2946 } 2947 } 2948 2949 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2950 { 2951 u32 key, mask; 2952 __be32 _key, _mask; 2953 int err; 2954 2955 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2956 return 0; 2957 2958 key = 0; 2959 mask = 0; 2960 2961 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2962 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2963 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2964 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2965 FLOW_DIS_FIRST_FRAG); 2966 2967 _key = cpu_to_be32(key); 2968 _mask = cpu_to_be32(mask); 2969 2970 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2971 if (err) 2972 return err; 2973 2974 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2975 } 2976 2977 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2978 struct flow_dissector_key_enc_opts *enc_opts) 2979 { 2980 struct geneve_opt *opt; 2981 struct nlattr *nest; 2982 int opt_off = 0; 2983 2984 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2985 if (!nest) 2986 goto nla_put_failure; 2987 2988 while (enc_opts->len > opt_off) { 2989 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2990 2991 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2992 opt->opt_class)) 2993 goto nla_put_failure; 2994 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2995 opt->type)) 2996 goto nla_put_failure; 2997 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2998 opt->length * 4, opt->opt_data)) 2999 goto nla_put_failure; 3000 3001 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 3002 } 3003 nla_nest_end(skb, nest); 3004 return 0; 3005 3006 nla_put_failure: 3007 nla_nest_cancel(skb, nest); 3008 return -EMSGSIZE; 3009 } 3010 3011 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 3012 struct flow_dissector_key_enc_opts *enc_opts) 3013 { 3014 struct vxlan_metadata *md; 3015 struct nlattr *nest; 3016 3017 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 3018 if (!nest) 3019 goto nla_put_failure; 3020 3021 md = (struct vxlan_metadata *)&enc_opts->data[0]; 3022 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 3023 goto nla_put_failure; 3024 3025 nla_nest_end(skb, nest); 3026 return 0; 3027 3028 nla_put_failure: 3029 nla_nest_cancel(skb, nest); 3030 return -EMSGSIZE; 3031 } 3032 3033 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 3034 struct flow_dissector_key_enc_opts *enc_opts) 3035 { 3036 struct erspan_metadata *md; 3037 struct nlattr *nest; 3038 3039 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 3040 if (!nest) 3041 goto nla_put_failure; 3042 3043 md = (struct erspan_metadata *)&enc_opts->data[0]; 3044 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 3045 goto nla_put_failure; 3046 3047 if (md->version == 1 && 3048 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 3049 goto nla_put_failure; 3050 3051 if (md->version == 2 && 3052 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 3053 md->u.md2.dir) || 3054 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 3055 get_hwid(&md->u.md2)))) 3056 goto nla_put_failure; 3057 3058 nla_nest_end(skb, nest); 3059 return 0; 3060 3061 nla_put_failure: 3062 nla_nest_cancel(skb, nest); 3063 return -EMSGSIZE; 3064 } 3065 3066 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 3067 struct flow_dissector_key_enc_opts *enc_opts) 3068 3069 { 3070 struct gtp_pdu_session_info *session_info; 3071 struct nlattr *nest; 3072 3073 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 3074 if (!nest) 3075 goto nla_put_failure; 3076 3077 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 3078 3079 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 3080 session_info->pdu_type)) 3081 goto nla_put_failure; 3082 3083 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 3084 goto nla_put_failure; 3085 3086 nla_nest_end(skb, nest); 3087 return 0; 3088 3089 nla_put_failure: 3090 nla_nest_cancel(skb, nest); 3091 return -EMSGSIZE; 3092 } 3093 3094 static int fl_dump_key_ct(struct sk_buff *skb, 3095 struct flow_dissector_key_ct *key, 3096 struct flow_dissector_key_ct *mask) 3097 { 3098 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 3099 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 3100 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 3101 sizeof(key->ct_state))) 3102 goto nla_put_failure; 3103 3104 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 3105 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 3106 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 3107 sizeof(key->ct_zone))) 3108 goto nla_put_failure; 3109 3110 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3111 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 3112 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 3113 sizeof(key->ct_mark))) 3114 goto nla_put_failure; 3115 3116 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3117 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 3118 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 3119 sizeof(key->ct_labels))) 3120 goto nla_put_failure; 3121 3122 return 0; 3123 3124 nla_put_failure: 3125 return -EMSGSIZE; 3126 } 3127 3128 static int fl_dump_key_cfm(struct sk_buff *skb, 3129 struct flow_dissector_key_cfm *key, 3130 struct flow_dissector_key_cfm *mask) 3131 { 3132 struct nlattr *opts; 3133 int err; 3134 u8 mdl; 3135 3136 if (!memchr_inv(mask, 0, sizeof(*mask))) 3137 return 0; 3138 3139 opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); 3140 if (!opts) 3141 return -EMSGSIZE; 3142 3143 if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { 3144 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); 3145 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); 3146 if (err) 3147 goto err_cfm_opts; 3148 } 3149 3150 if (mask->opcode) { 3151 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); 3152 if (err) 3153 goto err_cfm_opts; 3154 } 3155 3156 nla_nest_end(skb, opts); 3157 3158 return 0; 3159 3160 err_cfm_opts: 3161 nla_nest_cancel(skb, opts); 3162 return err; 3163 } 3164 3165 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3166 struct flow_dissector_key_enc_opts *enc_opts) 3167 { 3168 struct nlattr *nest; 3169 int err; 3170 3171 if (!enc_opts->len) 3172 return 0; 3173 3174 nest = nla_nest_start_noflag(skb, enc_opt_type); 3175 if (!nest) 3176 goto nla_put_failure; 3177 3178 switch (enc_opts->dst_opt_type) { 3179 case TUNNEL_GENEVE_OPT: 3180 err = fl_dump_key_geneve_opt(skb, enc_opts); 3181 if (err) 3182 goto nla_put_failure; 3183 break; 3184 case TUNNEL_VXLAN_OPT: 3185 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3186 if (err) 3187 goto nla_put_failure; 3188 break; 3189 case TUNNEL_ERSPAN_OPT: 3190 err = fl_dump_key_erspan_opt(skb, enc_opts); 3191 if (err) 3192 goto nla_put_failure; 3193 break; 3194 case TUNNEL_GTP_OPT: 3195 err = fl_dump_key_gtp_opt(skb, enc_opts); 3196 if (err) 3197 goto nla_put_failure; 3198 break; 3199 default: 3200 goto nla_put_failure; 3201 } 3202 nla_nest_end(skb, nest); 3203 return 0; 3204 3205 nla_put_failure: 3206 nla_nest_cancel(skb, nest); 3207 return -EMSGSIZE; 3208 } 3209 3210 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3211 struct flow_dissector_key_enc_opts *key_opts, 3212 struct flow_dissector_key_enc_opts *msk_opts) 3213 { 3214 int err; 3215 3216 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3217 if (err) 3218 return err; 3219 3220 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3221 } 3222 3223 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3224 struct fl_flow_key *key, struct fl_flow_key *mask) 3225 { 3226 if (mask->meta.ingress_ifindex) { 3227 struct net_device *dev; 3228 3229 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3230 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3231 goto nla_put_failure; 3232 } 3233 3234 if (fl_dump_key_val(skb, &key->meta.l2_miss, 3235 TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, 3236 TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 3237 goto nla_put_failure; 3238 3239 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3240 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3241 sizeof(key->eth.dst)) || 3242 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3243 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3244 sizeof(key->eth.src)) || 3245 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3246 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3247 sizeof(key->basic.n_proto))) 3248 goto nla_put_failure; 3249 3250 if (mask->num_of_vlans.num_of_vlans) { 3251 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3252 goto nla_put_failure; 3253 } 3254 3255 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3256 goto nla_put_failure; 3257 3258 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3259 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3260 goto nla_put_failure; 3261 3262 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3263 TCA_FLOWER_KEY_CVLAN_PRIO, 3264 &key->cvlan, &mask->cvlan) || 3265 (mask->cvlan.vlan_tpid && 3266 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3267 key->cvlan.vlan_tpid))) 3268 goto nla_put_failure; 3269 3270 if (mask->basic.n_proto) { 3271 if (mask->cvlan.vlan_eth_type) { 3272 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3273 key->basic.n_proto)) 3274 goto nla_put_failure; 3275 } else if (mask->vlan.vlan_eth_type) { 3276 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3277 key->vlan.vlan_eth_type)) 3278 goto nla_put_failure; 3279 } 3280 } 3281 3282 if ((key->basic.n_proto == htons(ETH_P_IP) || 3283 key->basic.n_proto == htons(ETH_P_IPV6)) && 3284 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3285 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3286 sizeof(key->basic.ip_proto)) || 3287 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3288 goto nla_put_failure; 3289 3290 if (mask->pppoe.session_id) { 3291 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3292 key->pppoe.session_id)) 3293 goto nla_put_failure; 3294 } 3295 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3296 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3297 key->pppoe.ppp_proto)) 3298 goto nla_put_failure; 3299 } 3300 3301 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3302 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3303 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3304 sizeof(key->ipv4.src)) || 3305 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3306 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3307 sizeof(key->ipv4.dst)))) 3308 goto nla_put_failure; 3309 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3310 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3311 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3312 sizeof(key->ipv6.src)) || 3313 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3314 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3315 sizeof(key->ipv6.dst)))) 3316 goto nla_put_failure; 3317 3318 if (key->basic.ip_proto == IPPROTO_TCP && 3319 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3320 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3321 sizeof(key->tp.src)) || 3322 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3323 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3324 sizeof(key->tp.dst)) || 3325 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3326 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3327 sizeof(key->tcp.flags)))) 3328 goto nla_put_failure; 3329 else if (key->basic.ip_proto == IPPROTO_UDP && 3330 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3331 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3332 sizeof(key->tp.src)) || 3333 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3334 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3335 sizeof(key->tp.dst)))) 3336 goto nla_put_failure; 3337 else if (key->basic.ip_proto == IPPROTO_SCTP && 3338 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3339 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3340 sizeof(key->tp.src)) || 3341 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3342 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3343 sizeof(key->tp.dst)))) 3344 goto nla_put_failure; 3345 else if (key->basic.n_proto == htons(ETH_P_IP) && 3346 key->basic.ip_proto == IPPROTO_ICMP && 3347 (fl_dump_key_val(skb, &key->icmp.type, 3348 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3349 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3350 sizeof(key->icmp.type)) || 3351 fl_dump_key_val(skb, &key->icmp.code, 3352 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3353 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3354 sizeof(key->icmp.code)))) 3355 goto nla_put_failure; 3356 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3357 key->basic.ip_proto == IPPROTO_ICMPV6 && 3358 (fl_dump_key_val(skb, &key->icmp.type, 3359 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3360 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3361 sizeof(key->icmp.type)) || 3362 fl_dump_key_val(skb, &key->icmp.code, 3363 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3364 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3365 sizeof(key->icmp.code)))) 3366 goto nla_put_failure; 3367 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3368 key->basic.n_proto == htons(ETH_P_RARP)) && 3369 (fl_dump_key_val(skb, &key->arp.sip, 3370 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3371 TCA_FLOWER_KEY_ARP_SIP_MASK, 3372 sizeof(key->arp.sip)) || 3373 fl_dump_key_val(skb, &key->arp.tip, 3374 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3375 TCA_FLOWER_KEY_ARP_TIP_MASK, 3376 sizeof(key->arp.tip)) || 3377 fl_dump_key_val(skb, &key->arp.op, 3378 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3379 TCA_FLOWER_KEY_ARP_OP_MASK, 3380 sizeof(key->arp.op)) || 3381 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3382 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3383 sizeof(key->arp.sha)) || 3384 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3385 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3386 sizeof(key->arp.tha)))) 3387 goto nla_put_failure; 3388 else if (key->basic.ip_proto == IPPROTO_L2TP && 3389 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3390 TCA_FLOWER_KEY_L2TPV3_SID, 3391 &mask->l2tpv3.session_id, 3392 TCA_FLOWER_UNSPEC, 3393 sizeof(key->l2tpv3.session_id))) 3394 goto nla_put_failure; 3395 3396 if (key->ipsec.spi && 3397 fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, 3398 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 3399 sizeof(key->ipsec.spi))) 3400 goto nla_put_failure; 3401 3402 if ((key->basic.ip_proto == IPPROTO_TCP || 3403 key->basic.ip_proto == IPPROTO_UDP || 3404 key->basic.ip_proto == IPPROTO_SCTP) && 3405 fl_dump_key_port_range(skb, key, mask)) 3406 goto nla_put_failure; 3407 3408 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3409 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3410 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3411 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3412 sizeof(key->enc_ipv4.src)) || 3413 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3414 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3415 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3416 sizeof(key->enc_ipv4.dst)))) 3417 goto nla_put_failure; 3418 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3419 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3420 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3421 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3422 sizeof(key->enc_ipv6.src)) || 3423 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3424 TCA_FLOWER_KEY_ENC_IPV6_DST, 3425 &mask->enc_ipv6.dst, 3426 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3427 sizeof(key->enc_ipv6.dst)))) 3428 goto nla_put_failure; 3429 3430 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3431 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3432 sizeof(key->enc_key_id)) || 3433 fl_dump_key_val(skb, &key->enc_tp.src, 3434 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3435 &mask->enc_tp.src, 3436 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3437 sizeof(key->enc_tp.src)) || 3438 fl_dump_key_val(skb, &key->enc_tp.dst, 3439 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3440 &mask->enc_tp.dst, 3441 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3442 sizeof(key->enc_tp.dst)) || 3443 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3444 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3445 goto nla_put_failure; 3446 3447 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3448 goto nla_put_failure; 3449 3450 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3451 goto nla_put_failure; 3452 3453 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3454 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3455 sizeof(key->hash.hash))) 3456 goto nla_put_failure; 3457 3458 if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 3459 goto nla_put_failure; 3460 3461 return 0; 3462 3463 nla_put_failure: 3464 return -EMSGSIZE; 3465 } 3466 3467 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3468 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3469 { 3470 struct cls_fl_filter *f = fh; 3471 struct nlattr *nest; 3472 struct fl_flow_key *key, *mask; 3473 bool skip_hw; 3474 3475 if (!f) 3476 return skb->len; 3477 3478 t->tcm_handle = f->handle; 3479 3480 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3481 if (!nest) 3482 goto nla_put_failure; 3483 3484 spin_lock(&tp->lock); 3485 3486 if (f->res.classid && 3487 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3488 goto nla_put_failure_locked; 3489 3490 key = &f->key; 3491 mask = &f->mask->key; 3492 skip_hw = tc_skip_hw(f->flags); 3493 3494 if (fl_dump_key(skb, net, key, mask)) 3495 goto nla_put_failure_locked; 3496 3497 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3498 goto nla_put_failure_locked; 3499 3500 spin_unlock(&tp->lock); 3501 3502 if (!skip_hw) 3503 fl_hw_update_stats(tp, f, rtnl_held); 3504 3505 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3506 goto nla_put_failure; 3507 3508 if (tcf_exts_dump(skb, &f->exts)) 3509 goto nla_put_failure; 3510 3511 nla_nest_end(skb, nest); 3512 3513 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3514 goto nla_put_failure; 3515 3516 return skb->len; 3517 3518 nla_put_failure_locked: 3519 spin_unlock(&tp->lock); 3520 nla_put_failure: 3521 nla_nest_cancel(skb, nest); 3522 return -1; 3523 } 3524 3525 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3526 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3527 { 3528 struct cls_fl_filter *f = fh; 3529 struct nlattr *nest; 3530 bool skip_hw; 3531 3532 if (!f) 3533 return skb->len; 3534 3535 t->tcm_handle = f->handle; 3536 3537 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3538 if (!nest) 3539 goto nla_put_failure; 3540 3541 spin_lock(&tp->lock); 3542 3543 skip_hw = tc_skip_hw(f->flags); 3544 3545 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3546 goto nla_put_failure_locked; 3547 3548 spin_unlock(&tp->lock); 3549 3550 if (!skip_hw) 3551 fl_hw_update_stats(tp, f, rtnl_held); 3552 3553 if (tcf_exts_terse_dump(skb, &f->exts)) 3554 goto nla_put_failure; 3555 3556 nla_nest_end(skb, nest); 3557 3558 return skb->len; 3559 3560 nla_put_failure_locked: 3561 spin_unlock(&tp->lock); 3562 nla_put_failure: 3563 nla_nest_cancel(skb, nest); 3564 return -1; 3565 } 3566 3567 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3568 { 3569 struct fl_flow_tmplt *tmplt = tmplt_priv; 3570 struct fl_flow_key *key, *mask; 3571 struct nlattr *nest; 3572 3573 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3574 if (!nest) 3575 goto nla_put_failure; 3576 3577 key = &tmplt->dummy_key; 3578 mask = &tmplt->mask; 3579 3580 if (fl_dump_key(skb, net, key, mask)) 3581 goto nla_put_failure; 3582 3583 nla_nest_end(skb, nest); 3584 3585 return skb->len; 3586 3587 nla_put_failure: 3588 nla_nest_cancel(skb, nest); 3589 return -EMSGSIZE; 3590 } 3591 3592 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3593 unsigned long base) 3594 { 3595 struct cls_fl_filter *f = fh; 3596 3597 tc_cls_bind_class(classid, cl, q, &f->res, base); 3598 } 3599 3600 static bool fl_delete_empty(struct tcf_proto *tp) 3601 { 3602 struct cls_fl_head *head = fl_head_dereference(tp); 3603 3604 spin_lock(&tp->lock); 3605 tp->deleting = idr_is_empty(&head->handle_idr); 3606 spin_unlock(&tp->lock); 3607 3608 return tp->deleting; 3609 } 3610 3611 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3612 .kind = "flower", 3613 .classify = fl_classify, 3614 .init = fl_init, 3615 .destroy = fl_destroy, 3616 .get = fl_get, 3617 .put = fl_put, 3618 .change = fl_change, 3619 .delete = fl_delete, 3620 .delete_empty = fl_delete_empty, 3621 .walk = fl_walk, 3622 .reoffload = fl_reoffload, 3623 .hw_add = fl_hw_add, 3624 .hw_del = fl_hw_del, 3625 .dump = fl_dump, 3626 .terse_dump = fl_terse_dump, 3627 .bind_class = fl_bind_class, 3628 .tmplt_create = fl_tmplt_create, 3629 .tmplt_destroy = fl_tmplt_destroy, 3630 .tmplt_dump = fl_tmplt_dump, 3631 .get_exts = fl_get_exts, 3632 .owner = THIS_MODULE, 3633 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3634 }; 3635 3636 static int __init cls_fl_init(void) 3637 { 3638 return register_tcf_proto_ops(&cls_fl_ops); 3639 } 3640 3641 static void __exit cls_fl_exit(void) 3642 { 3643 unregister_tcf_proto_ops(&cls_fl_ops); 3644 } 3645 3646 module_init(cls_fl_init); 3647 module_exit(cls_fl_exit); 3648 3649 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3650 MODULE_DESCRIPTION("Flower classifier"); 3651 MODULE_LICENSE("GPL v2"); 3652