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