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