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