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