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 simmilar 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 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1157 memset(opt, 0xff, option_len); 1158 opt->length = data_len / 4; 1159 opt->r1 = 0; 1160 opt->r2 = 0; 1161 opt->r3 = 0; 1162 1163 /* If no mask has been prodived we assume an exact match. */ 1164 if (!depth) 1165 return sizeof(struct geneve_opt) + data_len; 1166 1167 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1168 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1169 return -EINVAL; 1170 } 1171 1172 err = nla_parse_nested_deprecated(tb, 1173 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1174 nla, geneve_opt_policy, extack); 1175 if (err < 0) 1176 return err; 1177 1178 /* We are not allowed to omit any of CLASS, TYPE or DATA 1179 * fields from the key. 1180 */ 1181 if (!option_len && 1182 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1183 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1184 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1185 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1186 return -EINVAL; 1187 } 1188 1189 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1190 * for the mask. 1191 */ 1192 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1193 int new_len = key->enc_opts.len; 1194 1195 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1196 data_len = nla_len(data); 1197 if (data_len < 4) { 1198 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1199 return -ERANGE; 1200 } 1201 if (data_len % 4) { 1202 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1203 return -ERANGE; 1204 } 1205 1206 new_len += sizeof(struct geneve_opt) + data_len; 1207 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1208 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1209 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1210 return -ERANGE; 1211 } 1212 opt->length = data_len / 4; 1213 memcpy(opt->opt_data, nla_data(data), data_len); 1214 } 1215 1216 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1217 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1218 opt->opt_class = nla_get_be16(class); 1219 } 1220 1221 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1222 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1223 opt->type = nla_get_u8(type); 1224 } 1225 1226 return sizeof(struct geneve_opt) + data_len; 1227 } 1228 1229 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1230 int depth, int option_len, 1231 struct netlink_ext_ack *extack) 1232 { 1233 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1234 struct vxlan_metadata *md; 1235 int err; 1236 1237 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1238 memset(md, 0xff, sizeof(*md)); 1239 1240 if (!depth) 1241 return sizeof(*md); 1242 1243 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1244 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1245 return -EINVAL; 1246 } 1247 1248 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1249 vxlan_opt_policy, extack); 1250 if (err < 0) 1251 return err; 1252 1253 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1254 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1255 return -EINVAL; 1256 } 1257 1258 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1259 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1260 md->gbp &= VXLAN_GBP_MASK; 1261 } 1262 1263 return sizeof(*md); 1264 } 1265 1266 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1267 int depth, int option_len, 1268 struct netlink_ext_ack *extack) 1269 { 1270 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1271 struct erspan_metadata *md; 1272 int err; 1273 1274 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1275 memset(md, 0xff, sizeof(*md)); 1276 md->version = 1; 1277 1278 if (!depth) 1279 return sizeof(*md); 1280 1281 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1282 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1283 return -EINVAL; 1284 } 1285 1286 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1287 erspan_opt_policy, extack); 1288 if (err < 0) 1289 return err; 1290 1291 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1292 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1293 return -EINVAL; 1294 } 1295 1296 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1297 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1298 1299 if (md->version == 1) { 1300 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1301 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1302 return -EINVAL; 1303 } 1304 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1305 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1306 memset(&md->u, 0x00, sizeof(md->u)); 1307 md->u.index = nla_get_be32(nla); 1308 } 1309 } else if (md->version == 2) { 1310 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1311 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1312 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1313 return -EINVAL; 1314 } 1315 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1316 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1317 md->u.md2.dir = nla_get_u8(nla); 1318 } 1319 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1320 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1321 set_hwid(&md->u.md2, nla_get_u8(nla)); 1322 } 1323 } else { 1324 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1325 return -EINVAL; 1326 } 1327 1328 return sizeof(*md); 1329 } 1330 1331 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1332 int depth, int option_len, 1333 struct netlink_ext_ack *extack) 1334 { 1335 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1336 struct gtp_pdu_session_info *sinfo; 1337 u8 len = key->enc_opts.len; 1338 int err; 1339 1340 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1341 memset(sinfo, 0xff, option_len); 1342 1343 if (!depth) 1344 return sizeof(*sinfo); 1345 1346 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1347 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1348 return -EINVAL; 1349 } 1350 1351 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1352 gtp_opt_policy, extack); 1353 if (err < 0) 1354 return err; 1355 1356 if (!option_len && 1357 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1358 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1359 NL_SET_ERR_MSG_MOD(extack, 1360 "Missing tunnel key gtp option pdu type or qfi"); 1361 return -EINVAL; 1362 } 1363 1364 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1365 sinfo->pdu_type = 1366 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1367 1368 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1369 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1370 1371 return sizeof(*sinfo); 1372 } 1373 1374 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1375 struct fl_flow_key *mask, 1376 struct netlink_ext_ack *extack) 1377 { 1378 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1379 int err, option_len, key_depth, msk_depth = 0; 1380 1381 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1382 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1383 enc_opts_policy, extack); 1384 if (err) 1385 return err; 1386 1387 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1388 1389 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1390 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1391 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1392 enc_opts_policy, extack); 1393 if (err) 1394 return err; 1395 1396 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1397 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1398 if (!nla_ok(nla_opt_msk, msk_depth)) { 1399 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1400 return -EINVAL; 1401 } 1402 } 1403 1404 nla_for_each_attr(nla_opt_key, nla_enc_key, 1405 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1406 switch (nla_type(nla_opt_key)) { 1407 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1408 if (key->enc_opts.dst_opt_type && 1409 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1410 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1411 return -EINVAL; 1412 } 1413 option_len = 0; 1414 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1415 option_len = fl_set_geneve_opt(nla_opt_key, key, 1416 key_depth, option_len, 1417 extack); 1418 if (option_len < 0) 1419 return option_len; 1420 1421 key->enc_opts.len += option_len; 1422 /* At the same time we need to parse through the mask 1423 * in order to verify exact and mask attribute lengths. 1424 */ 1425 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1426 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1427 msk_depth, option_len, 1428 extack); 1429 if (option_len < 0) 1430 return option_len; 1431 1432 mask->enc_opts.len += option_len; 1433 if (key->enc_opts.len != mask->enc_opts.len) { 1434 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1435 return -EINVAL; 1436 } 1437 break; 1438 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1439 if (key->enc_opts.dst_opt_type) { 1440 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1441 return -EINVAL; 1442 } 1443 option_len = 0; 1444 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1445 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1446 key_depth, option_len, 1447 extack); 1448 if (option_len < 0) 1449 return option_len; 1450 1451 key->enc_opts.len += option_len; 1452 /* At the same time we need to parse through the mask 1453 * in order to verify exact and mask attribute lengths. 1454 */ 1455 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1456 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1457 msk_depth, option_len, 1458 extack); 1459 if (option_len < 0) 1460 return option_len; 1461 1462 mask->enc_opts.len += option_len; 1463 if (key->enc_opts.len != mask->enc_opts.len) { 1464 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1465 return -EINVAL; 1466 } 1467 break; 1468 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1469 if (key->enc_opts.dst_opt_type) { 1470 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1471 return -EINVAL; 1472 } 1473 option_len = 0; 1474 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1475 option_len = fl_set_erspan_opt(nla_opt_key, key, 1476 key_depth, option_len, 1477 extack); 1478 if (option_len < 0) 1479 return option_len; 1480 1481 key->enc_opts.len += option_len; 1482 /* At the same time we need to parse through the mask 1483 * in order to verify exact and mask attribute lengths. 1484 */ 1485 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1486 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1487 msk_depth, option_len, 1488 extack); 1489 if (option_len < 0) 1490 return option_len; 1491 1492 mask->enc_opts.len += option_len; 1493 if (key->enc_opts.len != mask->enc_opts.len) { 1494 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1495 return -EINVAL; 1496 } 1497 break; 1498 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1499 if (key->enc_opts.dst_opt_type) { 1500 NL_SET_ERR_MSG_MOD(extack, 1501 "Duplicate type for gtp options"); 1502 return -EINVAL; 1503 } 1504 option_len = 0; 1505 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1506 option_len = fl_set_gtp_opt(nla_opt_key, key, 1507 key_depth, option_len, 1508 extack); 1509 if (option_len < 0) 1510 return option_len; 1511 1512 key->enc_opts.len += option_len; 1513 /* At the same time we need to parse through the mask 1514 * in order to verify exact and mask attribute lengths. 1515 */ 1516 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1517 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1518 msk_depth, option_len, 1519 extack); 1520 if (option_len < 0) 1521 return option_len; 1522 1523 mask->enc_opts.len += option_len; 1524 if (key->enc_opts.len != mask->enc_opts.len) { 1525 NL_SET_ERR_MSG_MOD(extack, 1526 "Key and mask miss aligned"); 1527 return -EINVAL; 1528 } 1529 break; 1530 default: 1531 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1532 return -EINVAL; 1533 } 1534 1535 if (!msk_depth) 1536 continue; 1537 1538 if (!nla_ok(nla_opt_msk, msk_depth)) { 1539 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1540 return -EINVAL; 1541 } 1542 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1543 } 1544 1545 return 0; 1546 } 1547 1548 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1549 struct netlink_ext_ack *extack) 1550 { 1551 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1552 NL_SET_ERR_MSG_ATTR(extack, tb, 1553 "no trk, so no other flag can be set"); 1554 return -EINVAL; 1555 } 1556 1557 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1558 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1559 NL_SET_ERR_MSG_ATTR(extack, tb, 1560 "new and est are mutually exclusive"); 1561 return -EINVAL; 1562 } 1563 1564 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1565 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1566 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1567 NL_SET_ERR_MSG_ATTR(extack, tb, 1568 "when inv is set, only trk may be set"); 1569 return -EINVAL; 1570 } 1571 1572 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1573 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1574 NL_SET_ERR_MSG_ATTR(extack, tb, 1575 "new and rpl are mutually exclusive"); 1576 return -EINVAL; 1577 } 1578 1579 return 0; 1580 } 1581 1582 static int fl_set_key_ct(struct nlattr **tb, 1583 struct flow_dissector_key_ct *key, 1584 struct flow_dissector_key_ct *mask, 1585 struct netlink_ext_ack *extack) 1586 { 1587 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1588 int err; 1589 1590 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1591 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1592 return -EOPNOTSUPP; 1593 } 1594 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1595 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1596 sizeof(key->ct_state)); 1597 1598 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1599 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1600 extack); 1601 if (err) 1602 return err; 1603 1604 } 1605 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1606 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1607 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1608 return -EOPNOTSUPP; 1609 } 1610 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1611 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1612 sizeof(key->ct_zone)); 1613 } 1614 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1615 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1616 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1617 return -EOPNOTSUPP; 1618 } 1619 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1620 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1621 sizeof(key->ct_mark)); 1622 } 1623 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1624 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1625 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1626 return -EOPNOTSUPP; 1627 } 1628 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1629 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1630 sizeof(key->ct_labels)); 1631 } 1632 1633 return 0; 1634 } 1635 1636 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1637 struct fl_flow_key *key, struct fl_flow_key *mask, 1638 int vthresh) 1639 { 1640 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1641 1642 if (!tb) { 1643 *ethertype = 0; 1644 return good_num_of_vlans; 1645 } 1646 1647 *ethertype = nla_get_be16(tb); 1648 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1649 return true; 1650 1651 key->basic.n_proto = *ethertype; 1652 mask->basic.n_proto = cpu_to_be16(~0); 1653 return false; 1654 } 1655 1656 static int fl_set_key(struct net *net, struct nlattr **tb, 1657 struct fl_flow_key *key, struct fl_flow_key *mask, 1658 struct netlink_ext_ack *extack) 1659 { 1660 __be16 ethertype; 1661 int ret = 0; 1662 1663 if (tb[TCA_FLOWER_INDEV]) { 1664 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1665 if (err < 0) 1666 return err; 1667 key->meta.ingress_ifindex = err; 1668 mask->meta.ingress_ifindex = 0xffffffff; 1669 } 1670 1671 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1672 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1673 sizeof(key->eth.dst)); 1674 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1675 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1676 sizeof(key->eth.src)); 1677 fl_set_key_val(tb, &key->num_of_vlans, 1678 TCA_FLOWER_KEY_NUM_OF_VLANS, 1679 &mask->num_of_vlans, 1680 TCA_FLOWER_UNSPEC, 1681 sizeof(key->num_of_vlans)); 1682 1683 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1684 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1685 TCA_FLOWER_KEY_VLAN_PRIO, 1686 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1687 &key->vlan, &mask->vlan); 1688 1689 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1690 ðertype, key, mask, 1)) { 1691 fl_set_key_vlan(tb, ethertype, 1692 TCA_FLOWER_KEY_CVLAN_ID, 1693 TCA_FLOWER_KEY_CVLAN_PRIO, 1694 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1695 &key->cvlan, &mask->cvlan); 1696 fl_set_key_val(tb, &key->basic.n_proto, 1697 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1698 &mask->basic.n_proto, 1699 TCA_FLOWER_UNSPEC, 1700 sizeof(key->basic.n_proto)); 1701 } 1702 } 1703 1704 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1705 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1706 1707 if (key->basic.n_proto == htons(ETH_P_IP) || 1708 key->basic.n_proto == htons(ETH_P_IPV6)) { 1709 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1710 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1711 sizeof(key->basic.ip_proto)); 1712 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1713 } 1714 1715 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1716 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1717 mask->control.addr_type = ~0; 1718 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1719 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1720 sizeof(key->ipv4.src)); 1721 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1722 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1723 sizeof(key->ipv4.dst)); 1724 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1725 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1726 mask->control.addr_type = ~0; 1727 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1728 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1729 sizeof(key->ipv6.src)); 1730 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1731 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1732 sizeof(key->ipv6.dst)); 1733 } 1734 1735 if (key->basic.ip_proto == IPPROTO_TCP) { 1736 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1737 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1738 sizeof(key->tp.src)); 1739 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1740 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1741 sizeof(key->tp.dst)); 1742 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1743 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1744 sizeof(key->tcp.flags)); 1745 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1746 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1747 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1748 sizeof(key->tp.src)); 1749 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1750 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1751 sizeof(key->tp.dst)); 1752 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1753 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1754 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1755 sizeof(key->tp.src)); 1756 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1757 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1758 sizeof(key->tp.dst)); 1759 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1760 key->basic.ip_proto == IPPROTO_ICMP) { 1761 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1762 &mask->icmp.type, 1763 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1764 sizeof(key->icmp.type)); 1765 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1766 &mask->icmp.code, 1767 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1768 sizeof(key->icmp.code)); 1769 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1770 key->basic.ip_proto == IPPROTO_ICMPV6) { 1771 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1772 &mask->icmp.type, 1773 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1774 sizeof(key->icmp.type)); 1775 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1776 &mask->icmp.code, 1777 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1778 sizeof(key->icmp.code)); 1779 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1780 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1781 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1782 if (ret) 1783 return ret; 1784 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1785 key->basic.n_proto == htons(ETH_P_RARP)) { 1786 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1787 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1788 sizeof(key->arp.sip)); 1789 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1790 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1791 sizeof(key->arp.tip)); 1792 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1793 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1794 sizeof(key->arp.op)); 1795 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1796 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1797 sizeof(key->arp.sha)); 1798 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1799 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1800 sizeof(key->arp.tha)); 1801 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 1802 fl_set_key_val(tb, &key->l2tpv3.session_id, 1803 TCA_FLOWER_KEY_L2TPV3_SID, 1804 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 1805 sizeof(key->l2tpv3.session_id)); 1806 } 1807 1808 if (key->basic.ip_proto == IPPROTO_TCP || 1809 key->basic.ip_proto == IPPROTO_UDP || 1810 key->basic.ip_proto == IPPROTO_SCTP) { 1811 ret = fl_set_key_port_range(tb, key, mask, extack); 1812 if (ret) 1813 return ret; 1814 } 1815 1816 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1817 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1818 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1819 mask->enc_control.addr_type = ~0; 1820 fl_set_key_val(tb, &key->enc_ipv4.src, 1821 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1822 &mask->enc_ipv4.src, 1823 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1824 sizeof(key->enc_ipv4.src)); 1825 fl_set_key_val(tb, &key->enc_ipv4.dst, 1826 TCA_FLOWER_KEY_ENC_IPV4_DST, 1827 &mask->enc_ipv4.dst, 1828 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1829 sizeof(key->enc_ipv4.dst)); 1830 } 1831 1832 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1833 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1834 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1835 mask->enc_control.addr_type = ~0; 1836 fl_set_key_val(tb, &key->enc_ipv6.src, 1837 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1838 &mask->enc_ipv6.src, 1839 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1840 sizeof(key->enc_ipv6.src)); 1841 fl_set_key_val(tb, &key->enc_ipv6.dst, 1842 TCA_FLOWER_KEY_ENC_IPV6_DST, 1843 &mask->enc_ipv6.dst, 1844 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1845 sizeof(key->enc_ipv6.dst)); 1846 } 1847 1848 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1849 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1850 sizeof(key->enc_key_id.keyid)); 1851 1852 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1853 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1854 sizeof(key->enc_tp.src)); 1855 1856 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1857 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1858 sizeof(key->enc_tp.dst)); 1859 1860 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1861 1862 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1863 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1864 sizeof(key->hash.hash)); 1865 1866 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1867 ret = fl_set_enc_opt(tb, key, mask, extack); 1868 if (ret) 1869 return ret; 1870 } 1871 1872 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1873 if (ret) 1874 return ret; 1875 1876 if (tb[TCA_FLOWER_KEY_FLAGS]) 1877 ret = fl_set_key_flags(tb, &key->control.flags, 1878 &mask->control.flags, extack); 1879 1880 return ret; 1881 } 1882 1883 static void fl_mask_copy(struct fl_flow_mask *dst, 1884 struct fl_flow_mask *src) 1885 { 1886 const void *psrc = fl_key_get_start(&src->key, src); 1887 void *pdst = fl_key_get_start(&dst->key, src); 1888 1889 memcpy(pdst, psrc, fl_mask_range(src)); 1890 dst->range = src->range; 1891 } 1892 1893 static const struct rhashtable_params fl_ht_params = { 1894 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1895 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1896 .automatic_shrinking = true, 1897 }; 1898 1899 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1900 { 1901 mask->filter_ht_params = fl_ht_params; 1902 mask->filter_ht_params.key_len = fl_mask_range(mask); 1903 mask->filter_ht_params.key_offset += mask->range.start; 1904 1905 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1906 } 1907 1908 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1909 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1910 1911 #define FL_KEY_IS_MASKED(mask, member) \ 1912 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1913 0, FL_KEY_MEMBER_SIZE(member)) \ 1914 1915 #define FL_KEY_SET(keys, cnt, id, member) \ 1916 do { \ 1917 keys[cnt].key_id = id; \ 1918 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1919 cnt++; \ 1920 } while(0); 1921 1922 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1923 do { \ 1924 if (FL_KEY_IS_MASKED(mask, member)) \ 1925 FL_KEY_SET(keys, cnt, id, member); \ 1926 } while(0); 1927 1928 static void fl_init_dissector(struct flow_dissector *dissector, 1929 struct fl_flow_key *mask) 1930 { 1931 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1932 size_t cnt = 0; 1933 1934 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1935 FLOW_DISSECTOR_KEY_META, meta); 1936 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1937 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1938 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1939 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1940 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1941 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1942 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1943 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1944 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1945 FLOW_DISSECTOR_KEY_PORTS, tp); 1946 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1947 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1948 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1949 FLOW_DISSECTOR_KEY_IP, ip); 1950 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1951 FLOW_DISSECTOR_KEY_TCP, tcp); 1952 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1953 FLOW_DISSECTOR_KEY_ICMP, icmp); 1954 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1955 FLOW_DISSECTOR_KEY_ARP, arp); 1956 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1957 FLOW_DISSECTOR_KEY_MPLS, mpls); 1958 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1959 FLOW_DISSECTOR_KEY_VLAN, vlan); 1960 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1961 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1962 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1963 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1964 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1965 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1966 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1967 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1968 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1969 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1970 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1971 enc_control); 1972 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1973 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1974 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1975 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1976 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1977 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1978 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1979 FLOW_DISSECTOR_KEY_CT, ct); 1980 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1981 FLOW_DISSECTOR_KEY_HASH, hash); 1982 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1983 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 1984 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1985 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 1986 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1987 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 1988 1989 skb_flow_dissector_init(dissector, keys, cnt); 1990 } 1991 1992 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1993 struct fl_flow_mask *mask) 1994 { 1995 struct fl_flow_mask *newmask; 1996 int err; 1997 1998 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1999 if (!newmask) 2000 return ERR_PTR(-ENOMEM); 2001 2002 fl_mask_copy(newmask, mask); 2003 2004 if ((newmask->key.tp_range.tp_min.dst && 2005 newmask->key.tp_range.tp_max.dst) || 2006 (newmask->key.tp_range.tp_min.src && 2007 newmask->key.tp_range.tp_max.src)) 2008 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2009 2010 err = fl_init_mask_hashtable(newmask); 2011 if (err) 2012 goto errout_free; 2013 2014 fl_init_dissector(&newmask->dissector, &newmask->key); 2015 2016 INIT_LIST_HEAD_RCU(&newmask->filters); 2017 2018 refcount_set(&newmask->refcnt, 1); 2019 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2020 &newmask->ht_node, mask_ht_params); 2021 if (err) 2022 goto errout_destroy; 2023 2024 spin_lock(&head->masks_lock); 2025 list_add_tail_rcu(&newmask->list, &head->masks); 2026 spin_unlock(&head->masks_lock); 2027 2028 return newmask; 2029 2030 errout_destroy: 2031 rhashtable_destroy(&newmask->ht); 2032 errout_free: 2033 kfree(newmask); 2034 2035 return ERR_PTR(err); 2036 } 2037 2038 static int fl_check_assign_mask(struct cls_fl_head *head, 2039 struct cls_fl_filter *fnew, 2040 struct cls_fl_filter *fold, 2041 struct fl_flow_mask *mask) 2042 { 2043 struct fl_flow_mask *newmask; 2044 int ret = 0; 2045 2046 rcu_read_lock(); 2047 2048 /* Insert mask as temporary node to prevent concurrent creation of mask 2049 * with same key. Any concurrent lookups with same key will return 2050 * -EAGAIN because mask's refcnt is zero. 2051 */ 2052 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2053 &mask->ht_node, 2054 mask_ht_params); 2055 if (!fnew->mask) { 2056 rcu_read_unlock(); 2057 2058 if (fold) { 2059 ret = -EINVAL; 2060 goto errout_cleanup; 2061 } 2062 2063 newmask = fl_create_new_mask(head, mask); 2064 if (IS_ERR(newmask)) { 2065 ret = PTR_ERR(newmask); 2066 goto errout_cleanup; 2067 } 2068 2069 fnew->mask = newmask; 2070 return 0; 2071 } else if (IS_ERR(fnew->mask)) { 2072 ret = PTR_ERR(fnew->mask); 2073 } else if (fold && fold->mask != fnew->mask) { 2074 ret = -EINVAL; 2075 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2076 /* Mask was deleted concurrently, try again */ 2077 ret = -EAGAIN; 2078 } 2079 rcu_read_unlock(); 2080 return ret; 2081 2082 errout_cleanup: 2083 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2084 mask_ht_params); 2085 return ret; 2086 } 2087 2088 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 2089 struct cls_fl_filter *f, struct fl_flow_mask *mask, 2090 unsigned long base, struct nlattr **tb, 2091 struct nlattr *est, 2092 struct fl_flow_tmplt *tmplt, 2093 u32 flags, u32 fl_flags, 2094 struct netlink_ext_ack *extack) 2095 { 2096 int err; 2097 2098 err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags, 2099 fl_flags, extack); 2100 if (err < 0) 2101 return err; 2102 2103 if (tb[TCA_FLOWER_CLASSID]) { 2104 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2105 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2106 rtnl_lock(); 2107 tcf_bind_filter(tp, &f->res, base); 2108 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2109 rtnl_unlock(); 2110 } 2111 2112 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 2113 if (err) 2114 return err; 2115 2116 fl_mask_update_range(mask); 2117 fl_set_masked_key(&f->mkey, &f->key, mask); 2118 2119 if (!fl_mask_fits_tmplt(tmplt, mask)) { 2120 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2121 return -EINVAL; 2122 } 2123 2124 return 0; 2125 } 2126 2127 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2128 struct cls_fl_filter *fold, 2129 bool *in_ht) 2130 { 2131 struct fl_flow_mask *mask = fnew->mask; 2132 int err; 2133 2134 err = rhashtable_lookup_insert_fast(&mask->ht, 2135 &fnew->ht_node, 2136 mask->filter_ht_params); 2137 if (err) { 2138 *in_ht = false; 2139 /* It is okay if filter with same key exists when 2140 * overwriting. 2141 */ 2142 return fold && err == -EEXIST ? 0 : err; 2143 } 2144 2145 *in_ht = true; 2146 return 0; 2147 } 2148 2149 static int fl_change(struct net *net, struct sk_buff *in_skb, 2150 struct tcf_proto *tp, unsigned long base, 2151 u32 handle, struct nlattr **tca, 2152 void **arg, u32 flags, 2153 struct netlink_ext_ack *extack) 2154 { 2155 struct cls_fl_head *head = fl_head_dereference(tp); 2156 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2157 struct cls_fl_filter *fold = *arg; 2158 struct cls_fl_filter *fnew; 2159 struct fl_flow_mask *mask; 2160 struct nlattr **tb; 2161 bool in_ht; 2162 int err; 2163 2164 if (!tca[TCA_OPTIONS]) { 2165 err = -EINVAL; 2166 goto errout_fold; 2167 } 2168 2169 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2170 if (!mask) { 2171 err = -ENOBUFS; 2172 goto errout_fold; 2173 } 2174 2175 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2176 if (!tb) { 2177 err = -ENOBUFS; 2178 goto errout_mask_alloc; 2179 } 2180 2181 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2182 tca[TCA_OPTIONS], fl_policy, NULL); 2183 if (err < 0) 2184 goto errout_tb; 2185 2186 if (fold && handle && fold->handle != handle) { 2187 err = -EINVAL; 2188 goto errout_tb; 2189 } 2190 2191 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2192 if (!fnew) { 2193 err = -ENOBUFS; 2194 goto errout_tb; 2195 } 2196 INIT_LIST_HEAD(&fnew->hw_list); 2197 refcount_set(&fnew->refcnt, 1); 2198 2199 if (tb[TCA_FLOWER_FLAGS]) { 2200 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2201 2202 if (!tc_flags_valid(fnew->flags)) { 2203 kfree(fnew); 2204 err = -EINVAL; 2205 goto errout_tb; 2206 } 2207 } 2208 2209 if (!fold) { 2210 spin_lock(&tp->lock); 2211 if (!handle) { 2212 handle = 1; 2213 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2214 INT_MAX, GFP_ATOMIC); 2215 } else { 2216 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2217 handle, GFP_ATOMIC); 2218 2219 /* Filter with specified handle was concurrently 2220 * inserted after initial check in cls_api. This is not 2221 * necessarily an error if NLM_F_EXCL is not set in 2222 * message flags. Returning EAGAIN will cause cls_api to 2223 * try to update concurrently inserted rule. 2224 */ 2225 if (err == -ENOSPC) 2226 err = -EAGAIN; 2227 } 2228 spin_unlock(&tp->lock); 2229 2230 if (err) { 2231 kfree(fnew); 2232 goto errout_tb; 2233 } 2234 } 2235 fnew->handle = handle; 2236 2237 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2238 !tc_skip_hw(fnew->flags)); 2239 if (err < 0) 2240 goto errout_idr; 2241 2242 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], 2243 tp->chain->tmplt_priv, flags, fnew->flags, 2244 extack); 2245 if (err) 2246 goto errout_idr; 2247 2248 err = fl_check_assign_mask(head, fnew, fold, mask); 2249 if (err) 2250 goto errout_idr; 2251 2252 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2253 if (err) 2254 goto errout_mask; 2255 2256 if (!tc_skip_hw(fnew->flags)) { 2257 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2258 if (err) 2259 goto errout_ht; 2260 } 2261 2262 if (!tc_in_hw(fnew->flags)) 2263 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2264 2265 spin_lock(&tp->lock); 2266 2267 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2268 * proto again or create new one, if necessary. 2269 */ 2270 if (tp->deleting) { 2271 err = -EAGAIN; 2272 goto errout_hw; 2273 } 2274 2275 if (fold) { 2276 /* Fold filter was deleted concurrently. Retry lookup. */ 2277 if (fold->deleted) { 2278 err = -EAGAIN; 2279 goto errout_hw; 2280 } 2281 2282 fnew->handle = handle; 2283 2284 if (!in_ht) { 2285 struct rhashtable_params params = 2286 fnew->mask->filter_ht_params; 2287 2288 err = rhashtable_insert_fast(&fnew->mask->ht, 2289 &fnew->ht_node, 2290 params); 2291 if (err) 2292 goto errout_hw; 2293 in_ht = true; 2294 } 2295 2296 refcount_inc(&fnew->refcnt); 2297 rhashtable_remove_fast(&fold->mask->ht, 2298 &fold->ht_node, 2299 fold->mask->filter_ht_params); 2300 idr_replace(&head->handle_idr, fnew, fnew->handle); 2301 list_replace_rcu(&fold->list, &fnew->list); 2302 fold->deleted = true; 2303 2304 spin_unlock(&tp->lock); 2305 2306 fl_mask_put(head, fold->mask); 2307 if (!tc_skip_hw(fold->flags)) 2308 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2309 tcf_unbind_filter(tp, &fold->res); 2310 /* Caller holds reference to fold, so refcnt is always > 0 2311 * after this. 2312 */ 2313 refcount_dec(&fold->refcnt); 2314 __fl_put(fold); 2315 } else { 2316 idr_replace(&head->handle_idr, fnew, fnew->handle); 2317 2318 refcount_inc(&fnew->refcnt); 2319 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2320 spin_unlock(&tp->lock); 2321 } 2322 2323 *arg = fnew; 2324 2325 kfree(tb); 2326 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2327 return 0; 2328 2329 errout_ht: 2330 spin_lock(&tp->lock); 2331 errout_hw: 2332 fnew->deleted = true; 2333 spin_unlock(&tp->lock); 2334 if (!tc_skip_hw(fnew->flags)) 2335 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2336 if (in_ht) 2337 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2338 fnew->mask->filter_ht_params); 2339 errout_mask: 2340 fl_mask_put(head, fnew->mask); 2341 errout_idr: 2342 idr_remove(&head->handle_idr, fnew->handle); 2343 __fl_put(fnew); 2344 errout_tb: 2345 kfree(tb); 2346 errout_mask_alloc: 2347 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2348 errout_fold: 2349 if (fold) 2350 __fl_put(fold); 2351 return err; 2352 } 2353 2354 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2355 bool rtnl_held, struct netlink_ext_ack *extack) 2356 { 2357 struct cls_fl_head *head = fl_head_dereference(tp); 2358 struct cls_fl_filter *f = arg; 2359 bool last_on_mask; 2360 int err = 0; 2361 2362 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2363 *last = list_empty(&head->masks); 2364 __fl_put(f); 2365 2366 return err; 2367 } 2368 2369 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2370 bool rtnl_held) 2371 { 2372 struct cls_fl_head *head = fl_head_dereference(tp); 2373 unsigned long id = arg->cookie, tmp; 2374 struct cls_fl_filter *f; 2375 2376 arg->count = arg->skip; 2377 2378 rcu_read_lock(); 2379 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2380 /* don't return filters that are being deleted */ 2381 if (!refcount_inc_not_zero(&f->refcnt)) 2382 continue; 2383 rcu_read_unlock(); 2384 2385 if (arg->fn(tp, f, arg) < 0) { 2386 __fl_put(f); 2387 arg->stop = 1; 2388 rcu_read_lock(); 2389 break; 2390 } 2391 __fl_put(f); 2392 arg->count++; 2393 rcu_read_lock(); 2394 } 2395 rcu_read_unlock(); 2396 arg->cookie = id; 2397 } 2398 2399 static struct cls_fl_filter * 2400 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2401 { 2402 struct cls_fl_head *head = fl_head_dereference(tp); 2403 2404 spin_lock(&tp->lock); 2405 if (list_empty(&head->hw_filters)) { 2406 spin_unlock(&tp->lock); 2407 return NULL; 2408 } 2409 2410 if (!f) 2411 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2412 hw_list); 2413 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2414 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2415 spin_unlock(&tp->lock); 2416 return f; 2417 } 2418 } 2419 2420 spin_unlock(&tp->lock); 2421 return NULL; 2422 } 2423 2424 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2425 void *cb_priv, struct netlink_ext_ack *extack) 2426 { 2427 struct tcf_block *block = tp->chain->block; 2428 struct flow_cls_offload cls_flower = {}; 2429 struct cls_fl_filter *f = NULL; 2430 int err; 2431 2432 /* hw_filters list can only be changed by hw offload functions after 2433 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2434 * iterating it. 2435 */ 2436 ASSERT_RTNL(); 2437 2438 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2439 cls_flower.rule = 2440 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2441 if (!cls_flower.rule) { 2442 __fl_put(f); 2443 return -ENOMEM; 2444 } 2445 2446 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2447 extack); 2448 cls_flower.command = add ? 2449 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2450 cls_flower.cookie = (unsigned long)f; 2451 cls_flower.rule->match.dissector = &f->mask->dissector; 2452 cls_flower.rule->match.mask = &f->mask->key; 2453 cls_flower.rule->match.key = &f->mkey; 2454 2455 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2456 cls_flower.common.extack); 2457 if (err) { 2458 kfree(cls_flower.rule); 2459 if (tc_skip_sw(f->flags)) { 2460 __fl_put(f); 2461 return err; 2462 } 2463 goto next_flow; 2464 } 2465 2466 cls_flower.classid = f->res.classid; 2467 2468 err = tc_setup_cb_reoffload(block, tp, add, cb, 2469 TC_SETUP_CLSFLOWER, &cls_flower, 2470 cb_priv, &f->flags, 2471 &f->in_hw_count); 2472 tc_cleanup_offload_action(&cls_flower.rule->action); 2473 kfree(cls_flower.rule); 2474 2475 if (err) { 2476 __fl_put(f); 2477 return err; 2478 } 2479 next_flow: 2480 __fl_put(f); 2481 } 2482 2483 return 0; 2484 } 2485 2486 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2487 { 2488 struct flow_cls_offload *cls_flower = type_data; 2489 struct cls_fl_filter *f = 2490 (struct cls_fl_filter *) cls_flower->cookie; 2491 struct cls_fl_head *head = fl_head_dereference(tp); 2492 2493 spin_lock(&tp->lock); 2494 list_add(&f->hw_list, &head->hw_filters); 2495 spin_unlock(&tp->lock); 2496 } 2497 2498 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2499 { 2500 struct flow_cls_offload *cls_flower = type_data; 2501 struct cls_fl_filter *f = 2502 (struct cls_fl_filter *) cls_flower->cookie; 2503 2504 spin_lock(&tp->lock); 2505 if (!list_empty(&f->hw_list)) 2506 list_del_init(&f->hw_list); 2507 spin_unlock(&tp->lock); 2508 } 2509 2510 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2511 struct fl_flow_tmplt *tmplt) 2512 { 2513 struct flow_cls_offload cls_flower = {}; 2514 struct tcf_block *block = chain->block; 2515 2516 cls_flower.rule = flow_rule_alloc(0); 2517 if (!cls_flower.rule) 2518 return -ENOMEM; 2519 2520 cls_flower.common.chain_index = chain->index; 2521 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2522 cls_flower.cookie = (unsigned long) tmplt; 2523 cls_flower.rule->match.dissector = &tmplt->dissector; 2524 cls_flower.rule->match.mask = &tmplt->mask; 2525 cls_flower.rule->match.key = &tmplt->dummy_key; 2526 2527 /* We don't care if driver (any of them) fails to handle this 2528 * call. It serves just as a hint for it. 2529 */ 2530 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2531 kfree(cls_flower.rule); 2532 2533 return 0; 2534 } 2535 2536 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2537 struct fl_flow_tmplt *tmplt) 2538 { 2539 struct flow_cls_offload cls_flower = {}; 2540 struct tcf_block *block = chain->block; 2541 2542 cls_flower.common.chain_index = chain->index; 2543 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2544 cls_flower.cookie = (unsigned long) tmplt; 2545 2546 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2547 } 2548 2549 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2550 struct nlattr **tca, 2551 struct netlink_ext_ack *extack) 2552 { 2553 struct fl_flow_tmplt *tmplt; 2554 struct nlattr **tb; 2555 int err; 2556 2557 if (!tca[TCA_OPTIONS]) 2558 return ERR_PTR(-EINVAL); 2559 2560 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2561 if (!tb) 2562 return ERR_PTR(-ENOBUFS); 2563 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2564 tca[TCA_OPTIONS], fl_policy, NULL); 2565 if (err) 2566 goto errout_tb; 2567 2568 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2569 if (!tmplt) { 2570 err = -ENOMEM; 2571 goto errout_tb; 2572 } 2573 tmplt->chain = chain; 2574 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2575 if (err) 2576 goto errout_tmplt; 2577 2578 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2579 2580 err = fl_hw_create_tmplt(chain, tmplt); 2581 if (err) 2582 goto errout_tmplt; 2583 2584 kfree(tb); 2585 return tmplt; 2586 2587 errout_tmplt: 2588 kfree(tmplt); 2589 errout_tb: 2590 kfree(tb); 2591 return ERR_PTR(err); 2592 } 2593 2594 static void fl_tmplt_destroy(void *tmplt_priv) 2595 { 2596 struct fl_flow_tmplt *tmplt = tmplt_priv; 2597 2598 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2599 kfree(tmplt); 2600 } 2601 2602 static int fl_dump_key_val(struct sk_buff *skb, 2603 void *val, int val_type, 2604 void *mask, int mask_type, int len) 2605 { 2606 int err; 2607 2608 if (!memchr_inv(mask, 0, len)) 2609 return 0; 2610 err = nla_put(skb, val_type, len, val); 2611 if (err) 2612 return err; 2613 if (mask_type != TCA_FLOWER_UNSPEC) { 2614 err = nla_put(skb, mask_type, len, mask); 2615 if (err) 2616 return err; 2617 } 2618 return 0; 2619 } 2620 2621 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2622 struct fl_flow_key *mask) 2623 { 2624 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2625 TCA_FLOWER_KEY_PORT_DST_MIN, 2626 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2627 sizeof(key->tp_range.tp_min.dst)) || 2628 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2629 TCA_FLOWER_KEY_PORT_DST_MAX, 2630 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2631 sizeof(key->tp_range.tp_max.dst)) || 2632 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2633 TCA_FLOWER_KEY_PORT_SRC_MIN, 2634 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2635 sizeof(key->tp_range.tp_min.src)) || 2636 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2637 TCA_FLOWER_KEY_PORT_SRC_MAX, 2638 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2639 sizeof(key->tp_range.tp_max.src))) 2640 return -1; 2641 2642 return 0; 2643 } 2644 2645 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2646 struct flow_dissector_key_mpls *mpls_key, 2647 struct flow_dissector_key_mpls *mpls_mask, 2648 u8 lse_index) 2649 { 2650 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2651 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2652 int err; 2653 2654 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2655 lse_index + 1); 2656 if (err) 2657 return err; 2658 2659 if (lse_mask->mpls_ttl) { 2660 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2661 lse_key->mpls_ttl); 2662 if (err) 2663 return err; 2664 } 2665 if (lse_mask->mpls_bos) { 2666 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2667 lse_key->mpls_bos); 2668 if (err) 2669 return err; 2670 } 2671 if (lse_mask->mpls_tc) { 2672 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2673 lse_key->mpls_tc); 2674 if (err) 2675 return err; 2676 } 2677 if (lse_mask->mpls_label) { 2678 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2679 lse_key->mpls_label); 2680 if (err) 2681 return err; 2682 } 2683 2684 return 0; 2685 } 2686 2687 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2688 struct flow_dissector_key_mpls *mpls_key, 2689 struct flow_dissector_key_mpls *mpls_mask) 2690 { 2691 struct nlattr *opts; 2692 struct nlattr *lse; 2693 u8 lse_index; 2694 int err; 2695 2696 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2697 if (!opts) 2698 return -EMSGSIZE; 2699 2700 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2701 if (!(mpls_mask->used_lses & 1 << lse_index)) 2702 continue; 2703 2704 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2705 if (!lse) { 2706 err = -EMSGSIZE; 2707 goto err_opts; 2708 } 2709 2710 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2711 lse_index); 2712 if (err) 2713 goto err_opts_lse; 2714 nla_nest_end(skb, lse); 2715 } 2716 nla_nest_end(skb, opts); 2717 2718 return 0; 2719 2720 err_opts_lse: 2721 nla_nest_cancel(skb, lse); 2722 err_opts: 2723 nla_nest_cancel(skb, opts); 2724 2725 return err; 2726 } 2727 2728 static int fl_dump_key_mpls(struct sk_buff *skb, 2729 struct flow_dissector_key_mpls *mpls_key, 2730 struct flow_dissector_key_mpls *mpls_mask) 2731 { 2732 struct flow_dissector_mpls_lse *lse_mask; 2733 struct flow_dissector_mpls_lse *lse_key; 2734 int err; 2735 2736 if (!mpls_mask->used_lses) 2737 return 0; 2738 2739 lse_mask = &mpls_mask->ls[0]; 2740 lse_key = &mpls_key->ls[0]; 2741 2742 /* For backward compatibility, don't use the MPLS nested attributes if 2743 * the rule can be expressed using the old attributes. 2744 */ 2745 if (mpls_mask->used_lses & ~1 || 2746 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2747 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2748 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2749 2750 if (lse_mask->mpls_ttl) { 2751 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2752 lse_key->mpls_ttl); 2753 if (err) 2754 return err; 2755 } 2756 if (lse_mask->mpls_tc) { 2757 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2758 lse_key->mpls_tc); 2759 if (err) 2760 return err; 2761 } 2762 if (lse_mask->mpls_label) { 2763 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2764 lse_key->mpls_label); 2765 if (err) 2766 return err; 2767 } 2768 if (lse_mask->mpls_bos) { 2769 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2770 lse_key->mpls_bos); 2771 if (err) 2772 return err; 2773 } 2774 return 0; 2775 } 2776 2777 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2778 struct flow_dissector_key_ip *key, 2779 struct flow_dissector_key_ip *mask) 2780 { 2781 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2782 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2783 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2784 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2785 2786 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2787 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2788 return -1; 2789 2790 return 0; 2791 } 2792 2793 static int fl_dump_key_vlan(struct sk_buff *skb, 2794 int vlan_id_key, int vlan_prio_key, 2795 struct flow_dissector_key_vlan *vlan_key, 2796 struct flow_dissector_key_vlan *vlan_mask) 2797 { 2798 int err; 2799 2800 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2801 return 0; 2802 if (vlan_mask->vlan_id) { 2803 err = nla_put_u16(skb, vlan_id_key, 2804 vlan_key->vlan_id); 2805 if (err) 2806 return err; 2807 } 2808 if (vlan_mask->vlan_priority) { 2809 err = nla_put_u8(skb, vlan_prio_key, 2810 vlan_key->vlan_priority); 2811 if (err) 2812 return err; 2813 } 2814 return 0; 2815 } 2816 2817 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2818 u32 *flower_key, u32 *flower_mask, 2819 u32 flower_flag_bit, u32 dissector_flag_bit) 2820 { 2821 if (dissector_mask & dissector_flag_bit) { 2822 *flower_mask |= flower_flag_bit; 2823 if (dissector_key & dissector_flag_bit) 2824 *flower_key |= flower_flag_bit; 2825 } 2826 } 2827 2828 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2829 { 2830 u32 key, mask; 2831 __be32 _key, _mask; 2832 int err; 2833 2834 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2835 return 0; 2836 2837 key = 0; 2838 mask = 0; 2839 2840 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2841 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2842 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2843 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2844 FLOW_DIS_FIRST_FRAG); 2845 2846 _key = cpu_to_be32(key); 2847 _mask = cpu_to_be32(mask); 2848 2849 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2850 if (err) 2851 return err; 2852 2853 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2854 } 2855 2856 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2857 struct flow_dissector_key_enc_opts *enc_opts) 2858 { 2859 struct geneve_opt *opt; 2860 struct nlattr *nest; 2861 int opt_off = 0; 2862 2863 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2864 if (!nest) 2865 goto nla_put_failure; 2866 2867 while (enc_opts->len > opt_off) { 2868 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2869 2870 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2871 opt->opt_class)) 2872 goto nla_put_failure; 2873 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2874 opt->type)) 2875 goto nla_put_failure; 2876 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2877 opt->length * 4, opt->opt_data)) 2878 goto nla_put_failure; 2879 2880 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2881 } 2882 nla_nest_end(skb, nest); 2883 return 0; 2884 2885 nla_put_failure: 2886 nla_nest_cancel(skb, nest); 2887 return -EMSGSIZE; 2888 } 2889 2890 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2891 struct flow_dissector_key_enc_opts *enc_opts) 2892 { 2893 struct vxlan_metadata *md; 2894 struct nlattr *nest; 2895 2896 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2897 if (!nest) 2898 goto nla_put_failure; 2899 2900 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2901 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2902 goto nla_put_failure; 2903 2904 nla_nest_end(skb, nest); 2905 return 0; 2906 2907 nla_put_failure: 2908 nla_nest_cancel(skb, nest); 2909 return -EMSGSIZE; 2910 } 2911 2912 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2913 struct flow_dissector_key_enc_opts *enc_opts) 2914 { 2915 struct erspan_metadata *md; 2916 struct nlattr *nest; 2917 2918 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2919 if (!nest) 2920 goto nla_put_failure; 2921 2922 md = (struct erspan_metadata *)&enc_opts->data[0]; 2923 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2924 goto nla_put_failure; 2925 2926 if (md->version == 1 && 2927 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2928 goto nla_put_failure; 2929 2930 if (md->version == 2 && 2931 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2932 md->u.md2.dir) || 2933 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2934 get_hwid(&md->u.md2)))) 2935 goto nla_put_failure; 2936 2937 nla_nest_end(skb, nest); 2938 return 0; 2939 2940 nla_put_failure: 2941 nla_nest_cancel(skb, nest); 2942 return -EMSGSIZE; 2943 } 2944 2945 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 2946 struct flow_dissector_key_enc_opts *enc_opts) 2947 2948 { 2949 struct gtp_pdu_session_info *session_info; 2950 struct nlattr *nest; 2951 2952 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 2953 if (!nest) 2954 goto nla_put_failure; 2955 2956 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 2957 2958 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 2959 session_info->pdu_type)) 2960 goto nla_put_failure; 2961 2962 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 2963 goto nla_put_failure; 2964 2965 nla_nest_end(skb, nest); 2966 return 0; 2967 2968 nla_put_failure: 2969 nla_nest_cancel(skb, nest); 2970 return -EMSGSIZE; 2971 } 2972 2973 static int fl_dump_key_ct(struct sk_buff *skb, 2974 struct flow_dissector_key_ct *key, 2975 struct flow_dissector_key_ct *mask) 2976 { 2977 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2978 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2979 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2980 sizeof(key->ct_state))) 2981 goto nla_put_failure; 2982 2983 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2984 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2985 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2986 sizeof(key->ct_zone))) 2987 goto nla_put_failure; 2988 2989 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2990 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2991 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2992 sizeof(key->ct_mark))) 2993 goto nla_put_failure; 2994 2995 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2996 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2997 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2998 sizeof(key->ct_labels))) 2999 goto nla_put_failure; 3000 3001 return 0; 3002 3003 nla_put_failure: 3004 return -EMSGSIZE; 3005 } 3006 3007 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3008 struct flow_dissector_key_enc_opts *enc_opts) 3009 { 3010 struct nlattr *nest; 3011 int err; 3012 3013 if (!enc_opts->len) 3014 return 0; 3015 3016 nest = nla_nest_start_noflag(skb, enc_opt_type); 3017 if (!nest) 3018 goto nla_put_failure; 3019 3020 switch (enc_opts->dst_opt_type) { 3021 case TUNNEL_GENEVE_OPT: 3022 err = fl_dump_key_geneve_opt(skb, enc_opts); 3023 if (err) 3024 goto nla_put_failure; 3025 break; 3026 case TUNNEL_VXLAN_OPT: 3027 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3028 if (err) 3029 goto nla_put_failure; 3030 break; 3031 case TUNNEL_ERSPAN_OPT: 3032 err = fl_dump_key_erspan_opt(skb, enc_opts); 3033 if (err) 3034 goto nla_put_failure; 3035 break; 3036 case TUNNEL_GTP_OPT: 3037 err = fl_dump_key_gtp_opt(skb, enc_opts); 3038 if (err) 3039 goto nla_put_failure; 3040 break; 3041 default: 3042 goto nla_put_failure; 3043 } 3044 nla_nest_end(skb, nest); 3045 return 0; 3046 3047 nla_put_failure: 3048 nla_nest_cancel(skb, nest); 3049 return -EMSGSIZE; 3050 } 3051 3052 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3053 struct flow_dissector_key_enc_opts *key_opts, 3054 struct flow_dissector_key_enc_opts *msk_opts) 3055 { 3056 int err; 3057 3058 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3059 if (err) 3060 return err; 3061 3062 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3063 } 3064 3065 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3066 struct fl_flow_key *key, struct fl_flow_key *mask) 3067 { 3068 if (mask->meta.ingress_ifindex) { 3069 struct net_device *dev; 3070 3071 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3072 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3073 goto nla_put_failure; 3074 } 3075 3076 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3077 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3078 sizeof(key->eth.dst)) || 3079 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3080 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3081 sizeof(key->eth.src)) || 3082 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3083 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3084 sizeof(key->basic.n_proto))) 3085 goto nla_put_failure; 3086 3087 if (mask->num_of_vlans.num_of_vlans) { 3088 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3089 goto nla_put_failure; 3090 } 3091 3092 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3093 goto nla_put_failure; 3094 3095 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3096 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3097 goto nla_put_failure; 3098 3099 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3100 TCA_FLOWER_KEY_CVLAN_PRIO, 3101 &key->cvlan, &mask->cvlan) || 3102 (mask->cvlan.vlan_tpid && 3103 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3104 key->cvlan.vlan_tpid))) 3105 goto nla_put_failure; 3106 3107 if (mask->basic.n_proto) { 3108 if (mask->cvlan.vlan_eth_type) { 3109 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3110 key->basic.n_proto)) 3111 goto nla_put_failure; 3112 } else if (mask->vlan.vlan_eth_type) { 3113 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3114 key->vlan.vlan_eth_type)) 3115 goto nla_put_failure; 3116 } 3117 } 3118 3119 if ((key->basic.n_proto == htons(ETH_P_IP) || 3120 key->basic.n_proto == htons(ETH_P_IPV6)) && 3121 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3122 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3123 sizeof(key->basic.ip_proto)) || 3124 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3125 goto nla_put_failure; 3126 3127 if (mask->pppoe.session_id) { 3128 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3129 key->pppoe.session_id)) 3130 goto nla_put_failure; 3131 } 3132 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3133 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3134 key->pppoe.ppp_proto)) 3135 goto nla_put_failure; 3136 } 3137 3138 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3139 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3140 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3141 sizeof(key->ipv4.src)) || 3142 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3143 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3144 sizeof(key->ipv4.dst)))) 3145 goto nla_put_failure; 3146 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3147 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3148 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3149 sizeof(key->ipv6.src)) || 3150 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3151 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3152 sizeof(key->ipv6.dst)))) 3153 goto nla_put_failure; 3154 3155 if (key->basic.ip_proto == IPPROTO_TCP && 3156 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3157 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3158 sizeof(key->tp.src)) || 3159 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3160 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3161 sizeof(key->tp.dst)) || 3162 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3163 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3164 sizeof(key->tcp.flags)))) 3165 goto nla_put_failure; 3166 else if (key->basic.ip_proto == IPPROTO_UDP && 3167 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3168 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3169 sizeof(key->tp.src)) || 3170 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3171 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3172 sizeof(key->tp.dst)))) 3173 goto nla_put_failure; 3174 else if (key->basic.ip_proto == IPPROTO_SCTP && 3175 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3176 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3177 sizeof(key->tp.src)) || 3178 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3179 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3180 sizeof(key->tp.dst)))) 3181 goto nla_put_failure; 3182 else if (key->basic.n_proto == htons(ETH_P_IP) && 3183 key->basic.ip_proto == IPPROTO_ICMP && 3184 (fl_dump_key_val(skb, &key->icmp.type, 3185 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3186 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3187 sizeof(key->icmp.type)) || 3188 fl_dump_key_val(skb, &key->icmp.code, 3189 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3190 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3191 sizeof(key->icmp.code)))) 3192 goto nla_put_failure; 3193 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3194 key->basic.ip_proto == IPPROTO_ICMPV6 && 3195 (fl_dump_key_val(skb, &key->icmp.type, 3196 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3197 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3198 sizeof(key->icmp.type)) || 3199 fl_dump_key_val(skb, &key->icmp.code, 3200 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3201 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3202 sizeof(key->icmp.code)))) 3203 goto nla_put_failure; 3204 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3205 key->basic.n_proto == htons(ETH_P_RARP)) && 3206 (fl_dump_key_val(skb, &key->arp.sip, 3207 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3208 TCA_FLOWER_KEY_ARP_SIP_MASK, 3209 sizeof(key->arp.sip)) || 3210 fl_dump_key_val(skb, &key->arp.tip, 3211 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3212 TCA_FLOWER_KEY_ARP_TIP_MASK, 3213 sizeof(key->arp.tip)) || 3214 fl_dump_key_val(skb, &key->arp.op, 3215 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3216 TCA_FLOWER_KEY_ARP_OP_MASK, 3217 sizeof(key->arp.op)) || 3218 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3219 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3220 sizeof(key->arp.sha)) || 3221 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3222 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3223 sizeof(key->arp.tha)))) 3224 goto nla_put_failure; 3225 else if (key->basic.ip_proto == IPPROTO_L2TP && 3226 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3227 TCA_FLOWER_KEY_L2TPV3_SID, 3228 &mask->l2tpv3.session_id, 3229 TCA_FLOWER_UNSPEC, 3230 sizeof(key->l2tpv3.session_id))) 3231 goto nla_put_failure; 3232 3233 if ((key->basic.ip_proto == IPPROTO_TCP || 3234 key->basic.ip_proto == IPPROTO_UDP || 3235 key->basic.ip_proto == IPPROTO_SCTP) && 3236 fl_dump_key_port_range(skb, key, mask)) 3237 goto nla_put_failure; 3238 3239 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3240 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3241 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3242 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3243 sizeof(key->enc_ipv4.src)) || 3244 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3245 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3246 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3247 sizeof(key->enc_ipv4.dst)))) 3248 goto nla_put_failure; 3249 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3250 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3251 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3252 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3253 sizeof(key->enc_ipv6.src)) || 3254 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3255 TCA_FLOWER_KEY_ENC_IPV6_DST, 3256 &mask->enc_ipv6.dst, 3257 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3258 sizeof(key->enc_ipv6.dst)))) 3259 goto nla_put_failure; 3260 3261 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3262 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3263 sizeof(key->enc_key_id)) || 3264 fl_dump_key_val(skb, &key->enc_tp.src, 3265 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3266 &mask->enc_tp.src, 3267 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3268 sizeof(key->enc_tp.src)) || 3269 fl_dump_key_val(skb, &key->enc_tp.dst, 3270 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3271 &mask->enc_tp.dst, 3272 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3273 sizeof(key->enc_tp.dst)) || 3274 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3275 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3276 goto nla_put_failure; 3277 3278 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3279 goto nla_put_failure; 3280 3281 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3282 goto nla_put_failure; 3283 3284 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3285 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3286 sizeof(key->hash.hash))) 3287 goto nla_put_failure; 3288 3289 return 0; 3290 3291 nla_put_failure: 3292 return -EMSGSIZE; 3293 } 3294 3295 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3296 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3297 { 3298 struct cls_fl_filter *f = fh; 3299 struct nlattr *nest; 3300 struct fl_flow_key *key, *mask; 3301 bool skip_hw; 3302 3303 if (!f) 3304 return skb->len; 3305 3306 t->tcm_handle = f->handle; 3307 3308 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3309 if (!nest) 3310 goto nla_put_failure; 3311 3312 spin_lock(&tp->lock); 3313 3314 if (f->res.classid && 3315 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3316 goto nla_put_failure_locked; 3317 3318 key = &f->key; 3319 mask = &f->mask->key; 3320 skip_hw = tc_skip_hw(f->flags); 3321 3322 if (fl_dump_key(skb, net, key, mask)) 3323 goto nla_put_failure_locked; 3324 3325 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3326 goto nla_put_failure_locked; 3327 3328 spin_unlock(&tp->lock); 3329 3330 if (!skip_hw) 3331 fl_hw_update_stats(tp, f, rtnl_held); 3332 3333 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3334 goto nla_put_failure; 3335 3336 if (tcf_exts_dump(skb, &f->exts)) 3337 goto nla_put_failure; 3338 3339 nla_nest_end(skb, nest); 3340 3341 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3342 goto nla_put_failure; 3343 3344 return skb->len; 3345 3346 nla_put_failure_locked: 3347 spin_unlock(&tp->lock); 3348 nla_put_failure: 3349 nla_nest_cancel(skb, nest); 3350 return -1; 3351 } 3352 3353 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3354 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3355 { 3356 struct cls_fl_filter *f = fh; 3357 struct nlattr *nest; 3358 bool skip_hw; 3359 3360 if (!f) 3361 return skb->len; 3362 3363 t->tcm_handle = f->handle; 3364 3365 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3366 if (!nest) 3367 goto nla_put_failure; 3368 3369 spin_lock(&tp->lock); 3370 3371 skip_hw = tc_skip_hw(f->flags); 3372 3373 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3374 goto nla_put_failure_locked; 3375 3376 spin_unlock(&tp->lock); 3377 3378 if (!skip_hw) 3379 fl_hw_update_stats(tp, f, rtnl_held); 3380 3381 if (tcf_exts_terse_dump(skb, &f->exts)) 3382 goto nla_put_failure; 3383 3384 nla_nest_end(skb, nest); 3385 3386 return skb->len; 3387 3388 nla_put_failure_locked: 3389 spin_unlock(&tp->lock); 3390 nla_put_failure: 3391 nla_nest_cancel(skb, nest); 3392 return -1; 3393 } 3394 3395 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3396 { 3397 struct fl_flow_tmplt *tmplt = tmplt_priv; 3398 struct fl_flow_key *key, *mask; 3399 struct nlattr *nest; 3400 3401 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3402 if (!nest) 3403 goto nla_put_failure; 3404 3405 key = &tmplt->dummy_key; 3406 mask = &tmplt->mask; 3407 3408 if (fl_dump_key(skb, net, key, mask)) 3409 goto nla_put_failure; 3410 3411 nla_nest_end(skb, nest); 3412 3413 return skb->len; 3414 3415 nla_put_failure: 3416 nla_nest_cancel(skb, nest); 3417 return -EMSGSIZE; 3418 } 3419 3420 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3421 unsigned long base) 3422 { 3423 struct cls_fl_filter *f = fh; 3424 3425 tc_cls_bind_class(classid, cl, q, &f->res, base); 3426 } 3427 3428 static bool fl_delete_empty(struct tcf_proto *tp) 3429 { 3430 struct cls_fl_head *head = fl_head_dereference(tp); 3431 3432 spin_lock(&tp->lock); 3433 tp->deleting = idr_is_empty(&head->handle_idr); 3434 spin_unlock(&tp->lock); 3435 3436 return tp->deleting; 3437 } 3438 3439 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3440 .kind = "flower", 3441 .classify = fl_classify, 3442 .init = fl_init, 3443 .destroy = fl_destroy, 3444 .get = fl_get, 3445 .put = fl_put, 3446 .change = fl_change, 3447 .delete = fl_delete, 3448 .delete_empty = fl_delete_empty, 3449 .walk = fl_walk, 3450 .reoffload = fl_reoffload, 3451 .hw_add = fl_hw_add, 3452 .hw_del = fl_hw_del, 3453 .dump = fl_dump, 3454 .terse_dump = fl_terse_dump, 3455 .bind_class = fl_bind_class, 3456 .tmplt_create = fl_tmplt_create, 3457 .tmplt_destroy = fl_tmplt_destroy, 3458 .tmplt_dump = fl_tmplt_dump, 3459 .get_exts = fl_get_exts, 3460 .owner = THIS_MODULE, 3461 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3462 }; 3463 3464 static int __init cls_fl_init(void) 3465 { 3466 return register_tcf_proto_ops(&cls_fl_ops); 3467 } 3468 3469 static void __exit cls_fl_exit(void) 3470 { 3471 unregister_tcf_proto_ops(&cls_fl_ops); 3472 } 3473 3474 module_init(cls_fl_init); 3475 module_exit(cls_fl_exit); 3476 3477 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3478 MODULE_DESCRIPTION("Flower classifier"); 3479 MODULE_LICENSE("GPL v2"); 3480