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