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