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 int vlan_next_eth_type_key, 1017 struct flow_dissector_key_vlan *key_val, 1018 struct flow_dissector_key_vlan *key_mask) 1019 { 1020 #define VLAN_PRIORITY_MASK 0x7 1021 1022 if (tb[vlan_id_key]) { 1023 key_val->vlan_id = 1024 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1025 key_mask->vlan_id = VLAN_VID_MASK; 1026 } 1027 if (tb[vlan_prio_key]) { 1028 key_val->vlan_priority = 1029 nla_get_u8(tb[vlan_prio_key]) & 1030 VLAN_PRIORITY_MASK; 1031 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1032 } 1033 key_val->vlan_tpid = ethertype; 1034 key_mask->vlan_tpid = cpu_to_be16(~0); 1035 if (tb[vlan_next_eth_type_key]) { 1036 key_val->vlan_eth_type = 1037 nla_get_be16(tb[vlan_next_eth_type_key]); 1038 key_mask->vlan_eth_type = cpu_to_be16(~0); 1039 } 1040 } 1041 1042 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1043 u32 *dissector_key, u32 *dissector_mask, 1044 u32 flower_flag_bit, u32 dissector_flag_bit) 1045 { 1046 if (flower_mask & flower_flag_bit) { 1047 *dissector_mask |= dissector_flag_bit; 1048 if (flower_key & flower_flag_bit) 1049 *dissector_key |= dissector_flag_bit; 1050 } 1051 } 1052 1053 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1054 u32 *flags_mask, struct netlink_ext_ack *extack) 1055 { 1056 u32 key, mask; 1057 1058 /* mask is mandatory for flags */ 1059 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1060 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1061 return -EINVAL; 1062 } 1063 1064 key = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS])); 1065 mask = be32_to_cpu(nla_get_be32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1066 1067 *flags_key = 0; 1068 *flags_mask = 0; 1069 1070 fl_set_key_flag(key, mask, flags_key, flags_mask, 1071 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1072 fl_set_key_flag(key, mask, flags_key, flags_mask, 1073 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1074 FLOW_DIS_FIRST_FRAG); 1075 1076 return 0; 1077 } 1078 1079 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1080 struct flow_dissector_key_ip *key, 1081 struct flow_dissector_key_ip *mask) 1082 { 1083 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1084 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1085 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1086 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1087 1088 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1089 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1090 } 1091 1092 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1093 int depth, int option_len, 1094 struct netlink_ext_ack *extack) 1095 { 1096 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1097 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1098 struct geneve_opt *opt; 1099 int err, data_len = 0; 1100 1101 if (option_len > sizeof(struct geneve_opt)) 1102 data_len = option_len - sizeof(struct geneve_opt); 1103 1104 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1105 memset(opt, 0xff, option_len); 1106 opt->length = data_len / 4; 1107 opt->r1 = 0; 1108 opt->r2 = 0; 1109 opt->r3 = 0; 1110 1111 /* If no mask has been prodived we assume an exact match. */ 1112 if (!depth) 1113 return sizeof(struct geneve_opt) + data_len; 1114 1115 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1116 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1117 return -EINVAL; 1118 } 1119 1120 err = nla_parse_nested_deprecated(tb, 1121 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1122 nla, geneve_opt_policy, extack); 1123 if (err < 0) 1124 return err; 1125 1126 /* We are not allowed to omit any of CLASS, TYPE or DATA 1127 * fields from the key. 1128 */ 1129 if (!option_len && 1130 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1131 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1132 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1133 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1134 return -EINVAL; 1135 } 1136 1137 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1138 * for the mask. 1139 */ 1140 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1141 int new_len = key->enc_opts.len; 1142 1143 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1144 data_len = nla_len(data); 1145 if (data_len < 4) { 1146 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1147 return -ERANGE; 1148 } 1149 if (data_len % 4) { 1150 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1151 return -ERANGE; 1152 } 1153 1154 new_len += sizeof(struct geneve_opt) + data_len; 1155 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1156 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1157 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1158 return -ERANGE; 1159 } 1160 opt->length = data_len / 4; 1161 memcpy(opt->opt_data, nla_data(data), data_len); 1162 } 1163 1164 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1165 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1166 opt->opt_class = nla_get_be16(class); 1167 } 1168 1169 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1170 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1171 opt->type = nla_get_u8(type); 1172 } 1173 1174 return sizeof(struct geneve_opt) + data_len; 1175 } 1176 1177 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1178 int depth, int option_len, 1179 struct netlink_ext_ack *extack) 1180 { 1181 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1182 struct vxlan_metadata *md; 1183 int err; 1184 1185 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1186 memset(md, 0xff, sizeof(*md)); 1187 1188 if (!depth) 1189 return sizeof(*md); 1190 1191 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1192 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1193 return -EINVAL; 1194 } 1195 1196 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1197 vxlan_opt_policy, extack); 1198 if (err < 0) 1199 return err; 1200 1201 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1202 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1203 return -EINVAL; 1204 } 1205 1206 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1207 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1208 md->gbp &= VXLAN_GBP_MASK; 1209 } 1210 1211 return sizeof(*md); 1212 } 1213 1214 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1215 int depth, int option_len, 1216 struct netlink_ext_ack *extack) 1217 { 1218 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1219 struct erspan_metadata *md; 1220 int err; 1221 1222 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1223 memset(md, 0xff, sizeof(*md)); 1224 md->version = 1; 1225 1226 if (!depth) 1227 return sizeof(*md); 1228 1229 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1230 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1231 return -EINVAL; 1232 } 1233 1234 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1235 erspan_opt_policy, extack); 1236 if (err < 0) 1237 return err; 1238 1239 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1240 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1241 return -EINVAL; 1242 } 1243 1244 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1245 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1246 1247 if (md->version == 1) { 1248 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1249 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1250 return -EINVAL; 1251 } 1252 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1253 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1254 memset(&md->u, 0x00, sizeof(md->u)); 1255 md->u.index = nla_get_be32(nla); 1256 } 1257 } else if (md->version == 2) { 1258 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1259 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1260 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1261 return -EINVAL; 1262 } 1263 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1264 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1265 md->u.md2.dir = nla_get_u8(nla); 1266 } 1267 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1268 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1269 set_hwid(&md->u.md2, nla_get_u8(nla)); 1270 } 1271 } else { 1272 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1273 return -EINVAL; 1274 } 1275 1276 return sizeof(*md); 1277 } 1278 1279 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1280 int depth, int option_len, 1281 struct netlink_ext_ack *extack) 1282 { 1283 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1284 struct gtp_pdu_session_info *sinfo; 1285 u8 len = key->enc_opts.len; 1286 int err; 1287 1288 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1289 memset(sinfo, 0xff, option_len); 1290 1291 if (!depth) 1292 return sizeof(*sinfo); 1293 1294 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1295 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1296 return -EINVAL; 1297 } 1298 1299 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1300 gtp_opt_policy, extack); 1301 if (err < 0) 1302 return err; 1303 1304 if (!option_len && 1305 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1306 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1307 NL_SET_ERR_MSG_MOD(extack, 1308 "Missing tunnel key gtp option pdu type or qfi"); 1309 return -EINVAL; 1310 } 1311 1312 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1313 sinfo->pdu_type = 1314 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1315 1316 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1317 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1318 1319 return sizeof(*sinfo); 1320 } 1321 1322 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1323 struct fl_flow_key *mask, 1324 struct netlink_ext_ack *extack) 1325 { 1326 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1327 int err, option_len, key_depth, msk_depth = 0; 1328 1329 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1330 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1331 enc_opts_policy, extack); 1332 if (err) 1333 return err; 1334 1335 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1336 1337 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1338 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1339 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1340 enc_opts_policy, extack); 1341 if (err) 1342 return err; 1343 1344 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1345 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1346 if (!nla_ok(nla_opt_msk, msk_depth)) { 1347 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1348 return -EINVAL; 1349 } 1350 } 1351 1352 nla_for_each_attr(nla_opt_key, nla_enc_key, 1353 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1354 switch (nla_type(nla_opt_key)) { 1355 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1356 if (key->enc_opts.dst_opt_type && 1357 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1358 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1359 return -EINVAL; 1360 } 1361 option_len = 0; 1362 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1363 option_len = fl_set_geneve_opt(nla_opt_key, key, 1364 key_depth, option_len, 1365 extack); 1366 if (option_len < 0) 1367 return option_len; 1368 1369 key->enc_opts.len += option_len; 1370 /* At the same time we need to parse through the mask 1371 * in order to verify exact and mask attribute lengths. 1372 */ 1373 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1374 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1375 msk_depth, option_len, 1376 extack); 1377 if (option_len < 0) 1378 return option_len; 1379 1380 mask->enc_opts.len += option_len; 1381 if (key->enc_opts.len != mask->enc_opts.len) { 1382 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1383 return -EINVAL; 1384 } 1385 break; 1386 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1387 if (key->enc_opts.dst_opt_type) { 1388 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1389 return -EINVAL; 1390 } 1391 option_len = 0; 1392 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1393 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1394 key_depth, option_len, 1395 extack); 1396 if (option_len < 0) 1397 return option_len; 1398 1399 key->enc_opts.len += option_len; 1400 /* At the same time we need to parse through the mask 1401 * in order to verify exact and mask attribute lengths. 1402 */ 1403 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1404 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1405 msk_depth, option_len, 1406 extack); 1407 if (option_len < 0) 1408 return option_len; 1409 1410 mask->enc_opts.len += option_len; 1411 if (key->enc_opts.len != mask->enc_opts.len) { 1412 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1413 return -EINVAL; 1414 } 1415 break; 1416 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1417 if (key->enc_opts.dst_opt_type) { 1418 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1419 return -EINVAL; 1420 } 1421 option_len = 0; 1422 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1423 option_len = fl_set_erspan_opt(nla_opt_key, key, 1424 key_depth, option_len, 1425 extack); 1426 if (option_len < 0) 1427 return option_len; 1428 1429 key->enc_opts.len += option_len; 1430 /* At the same time we need to parse through the mask 1431 * in order to verify exact and mask attribute lengths. 1432 */ 1433 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1434 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1435 msk_depth, option_len, 1436 extack); 1437 if (option_len < 0) 1438 return option_len; 1439 1440 mask->enc_opts.len += option_len; 1441 if (key->enc_opts.len != mask->enc_opts.len) { 1442 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1443 return -EINVAL; 1444 } 1445 break; 1446 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1447 if (key->enc_opts.dst_opt_type) { 1448 NL_SET_ERR_MSG_MOD(extack, 1449 "Duplicate type for gtp options"); 1450 return -EINVAL; 1451 } 1452 option_len = 0; 1453 key->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1454 option_len = fl_set_gtp_opt(nla_opt_key, key, 1455 key_depth, option_len, 1456 extack); 1457 if (option_len < 0) 1458 return option_len; 1459 1460 key->enc_opts.len += option_len; 1461 /* At the same time we need to parse through the mask 1462 * in order to verify exact and mask attribute lengths. 1463 */ 1464 mask->enc_opts.dst_opt_type = TUNNEL_GTP_OPT; 1465 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1466 msk_depth, option_len, 1467 extack); 1468 if (option_len < 0) 1469 return option_len; 1470 1471 mask->enc_opts.len += option_len; 1472 if (key->enc_opts.len != mask->enc_opts.len) { 1473 NL_SET_ERR_MSG_MOD(extack, 1474 "Key and mask miss aligned"); 1475 return -EINVAL; 1476 } 1477 break; 1478 default: 1479 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1480 return -EINVAL; 1481 } 1482 1483 if (!msk_depth) 1484 continue; 1485 1486 if (!nla_ok(nla_opt_msk, msk_depth)) { 1487 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1488 return -EINVAL; 1489 } 1490 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1491 } 1492 1493 return 0; 1494 } 1495 1496 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1497 struct netlink_ext_ack *extack) 1498 { 1499 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1500 NL_SET_ERR_MSG_ATTR(extack, tb, 1501 "no trk, so no other flag can be set"); 1502 return -EINVAL; 1503 } 1504 1505 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1506 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1507 NL_SET_ERR_MSG_ATTR(extack, tb, 1508 "new and est are mutually exclusive"); 1509 return -EINVAL; 1510 } 1511 1512 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1513 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1514 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1515 NL_SET_ERR_MSG_ATTR(extack, tb, 1516 "when inv is set, only trk may be set"); 1517 return -EINVAL; 1518 } 1519 1520 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1521 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1522 NL_SET_ERR_MSG_ATTR(extack, tb, 1523 "new and rpl are mutually exclusive"); 1524 return -EINVAL; 1525 } 1526 1527 return 0; 1528 } 1529 1530 static int fl_set_key_ct(struct nlattr **tb, 1531 struct flow_dissector_key_ct *key, 1532 struct flow_dissector_key_ct *mask, 1533 struct netlink_ext_ack *extack) 1534 { 1535 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1536 int err; 1537 1538 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1539 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1540 return -EOPNOTSUPP; 1541 } 1542 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1543 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1544 sizeof(key->ct_state)); 1545 1546 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1547 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1548 extack); 1549 if (err) 1550 return err; 1551 1552 } 1553 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1554 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1555 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1556 return -EOPNOTSUPP; 1557 } 1558 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1559 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1560 sizeof(key->ct_zone)); 1561 } 1562 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1563 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1564 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1565 return -EOPNOTSUPP; 1566 } 1567 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1568 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1569 sizeof(key->ct_mark)); 1570 } 1571 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1572 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1573 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1574 return -EOPNOTSUPP; 1575 } 1576 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1577 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1578 sizeof(key->ct_labels)); 1579 } 1580 1581 return 0; 1582 } 1583 1584 static int fl_set_key(struct net *net, struct nlattr **tb, 1585 struct fl_flow_key *key, struct fl_flow_key *mask, 1586 struct netlink_ext_ack *extack) 1587 { 1588 __be16 ethertype; 1589 int ret = 0; 1590 1591 if (tb[TCA_FLOWER_INDEV]) { 1592 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1593 if (err < 0) 1594 return err; 1595 key->meta.ingress_ifindex = err; 1596 mask->meta.ingress_ifindex = 0xffffffff; 1597 } 1598 1599 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1600 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1601 sizeof(key->eth.dst)); 1602 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1603 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1604 sizeof(key->eth.src)); 1605 1606 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1607 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1608 1609 if (eth_type_vlan(ethertype)) { 1610 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1611 TCA_FLOWER_KEY_VLAN_PRIO, 1612 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1613 &key->vlan, &mask->vlan); 1614 1615 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1616 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1617 if (eth_type_vlan(ethertype)) { 1618 fl_set_key_vlan(tb, ethertype, 1619 TCA_FLOWER_KEY_CVLAN_ID, 1620 TCA_FLOWER_KEY_CVLAN_PRIO, 1621 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1622 &key->cvlan, &mask->cvlan); 1623 fl_set_key_val(tb, &key->basic.n_proto, 1624 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1625 &mask->basic.n_proto, 1626 TCA_FLOWER_UNSPEC, 1627 sizeof(key->basic.n_proto)); 1628 } else { 1629 key->basic.n_proto = ethertype; 1630 mask->basic.n_proto = cpu_to_be16(~0); 1631 } 1632 } 1633 } else { 1634 key->basic.n_proto = ethertype; 1635 mask->basic.n_proto = cpu_to_be16(~0); 1636 } 1637 } 1638 1639 if (key->basic.n_proto == htons(ETH_P_IP) || 1640 key->basic.n_proto == htons(ETH_P_IPV6)) { 1641 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1642 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1643 sizeof(key->basic.ip_proto)); 1644 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1645 } 1646 1647 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1648 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1649 mask->control.addr_type = ~0; 1650 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1651 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1652 sizeof(key->ipv4.src)); 1653 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1654 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1655 sizeof(key->ipv4.dst)); 1656 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1657 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1658 mask->control.addr_type = ~0; 1659 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1660 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1661 sizeof(key->ipv6.src)); 1662 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1663 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1664 sizeof(key->ipv6.dst)); 1665 } 1666 1667 if (key->basic.ip_proto == IPPROTO_TCP) { 1668 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1669 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1670 sizeof(key->tp.src)); 1671 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1672 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1673 sizeof(key->tp.dst)); 1674 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1675 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1676 sizeof(key->tcp.flags)); 1677 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1678 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1679 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1680 sizeof(key->tp.src)); 1681 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1682 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1683 sizeof(key->tp.dst)); 1684 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1685 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1686 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1687 sizeof(key->tp.src)); 1688 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1689 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1690 sizeof(key->tp.dst)); 1691 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1692 key->basic.ip_proto == IPPROTO_ICMP) { 1693 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1694 &mask->icmp.type, 1695 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1696 sizeof(key->icmp.type)); 1697 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1698 &mask->icmp.code, 1699 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1700 sizeof(key->icmp.code)); 1701 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1702 key->basic.ip_proto == IPPROTO_ICMPV6) { 1703 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1704 &mask->icmp.type, 1705 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1706 sizeof(key->icmp.type)); 1707 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1708 &mask->icmp.code, 1709 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1710 sizeof(key->icmp.code)); 1711 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1712 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1713 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1714 if (ret) 1715 return ret; 1716 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1717 key->basic.n_proto == htons(ETH_P_RARP)) { 1718 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1719 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1720 sizeof(key->arp.sip)); 1721 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1722 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1723 sizeof(key->arp.tip)); 1724 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1725 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1726 sizeof(key->arp.op)); 1727 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1728 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1729 sizeof(key->arp.sha)); 1730 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1731 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1732 sizeof(key->arp.tha)); 1733 } 1734 1735 if (key->basic.ip_proto == IPPROTO_TCP || 1736 key->basic.ip_proto == IPPROTO_UDP || 1737 key->basic.ip_proto == IPPROTO_SCTP) { 1738 ret = fl_set_key_port_range(tb, key, mask, extack); 1739 if (ret) 1740 return ret; 1741 } 1742 1743 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1744 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1745 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1746 mask->enc_control.addr_type = ~0; 1747 fl_set_key_val(tb, &key->enc_ipv4.src, 1748 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1749 &mask->enc_ipv4.src, 1750 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1751 sizeof(key->enc_ipv4.src)); 1752 fl_set_key_val(tb, &key->enc_ipv4.dst, 1753 TCA_FLOWER_KEY_ENC_IPV4_DST, 1754 &mask->enc_ipv4.dst, 1755 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1756 sizeof(key->enc_ipv4.dst)); 1757 } 1758 1759 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1760 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1761 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1762 mask->enc_control.addr_type = ~0; 1763 fl_set_key_val(tb, &key->enc_ipv6.src, 1764 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1765 &mask->enc_ipv6.src, 1766 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1767 sizeof(key->enc_ipv6.src)); 1768 fl_set_key_val(tb, &key->enc_ipv6.dst, 1769 TCA_FLOWER_KEY_ENC_IPV6_DST, 1770 &mask->enc_ipv6.dst, 1771 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1772 sizeof(key->enc_ipv6.dst)); 1773 } 1774 1775 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1776 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1777 sizeof(key->enc_key_id.keyid)); 1778 1779 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1780 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1781 sizeof(key->enc_tp.src)); 1782 1783 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1784 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1785 sizeof(key->enc_tp.dst)); 1786 1787 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1788 1789 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1790 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1791 sizeof(key->hash.hash)); 1792 1793 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1794 ret = fl_set_enc_opt(tb, key, mask, extack); 1795 if (ret) 1796 return ret; 1797 } 1798 1799 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1800 if (ret) 1801 return ret; 1802 1803 if (tb[TCA_FLOWER_KEY_FLAGS]) 1804 ret = fl_set_key_flags(tb, &key->control.flags, 1805 &mask->control.flags, extack); 1806 1807 return ret; 1808 } 1809 1810 static void fl_mask_copy(struct fl_flow_mask *dst, 1811 struct fl_flow_mask *src) 1812 { 1813 const void *psrc = fl_key_get_start(&src->key, src); 1814 void *pdst = fl_key_get_start(&dst->key, src); 1815 1816 memcpy(pdst, psrc, fl_mask_range(src)); 1817 dst->range = src->range; 1818 } 1819 1820 static const struct rhashtable_params fl_ht_params = { 1821 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1822 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1823 .automatic_shrinking = true, 1824 }; 1825 1826 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1827 { 1828 mask->filter_ht_params = fl_ht_params; 1829 mask->filter_ht_params.key_len = fl_mask_range(mask); 1830 mask->filter_ht_params.key_offset += mask->range.start; 1831 1832 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1833 } 1834 1835 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1836 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1837 1838 #define FL_KEY_IS_MASKED(mask, member) \ 1839 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1840 0, FL_KEY_MEMBER_SIZE(member)) \ 1841 1842 #define FL_KEY_SET(keys, cnt, id, member) \ 1843 do { \ 1844 keys[cnt].key_id = id; \ 1845 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1846 cnt++; \ 1847 } while(0); 1848 1849 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1850 do { \ 1851 if (FL_KEY_IS_MASKED(mask, member)) \ 1852 FL_KEY_SET(keys, cnt, id, member); \ 1853 } while(0); 1854 1855 static void fl_init_dissector(struct flow_dissector *dissector, 1856 struct fl_flow_key *mask) 1857 { 1858 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1859 size_t cnt = 0; 1860 1861 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1862 FLOW_DISSECTOR_KEY_META, meta); 1863 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1864 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1865 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1866 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1867 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1868 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1869 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1870 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1871 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1872 FLOW_DISSECTOR_KEY_PORTS, tp); 1873 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1874 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1875 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1876 FLOW_DISSECTOR_KEY_IP, ip); 1877 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1878 FLOW_DISSECTOR_KEY_TCP, tcp); 1879 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1880 FLOW_DISSECTOR_KEY_ICMP, icmp); 1881 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1882 FLOW_DISSECTOR_KEY_ARP, arp); 1883 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1884 FLOW_DISSECTOR_KEY_MPLS, mpls); 1885 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1886 FLOW_DISSECTOR_KEY_VLAN, vlan); 1887 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1888 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1889 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1890 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1891 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1892 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1893 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1894 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1895 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1896 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1897 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1898 enc_control); 1899 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1900 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1901 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1902 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1903 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1904 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1905 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1906 FLOW_DISSECTOR_KEY_CT, ct); 1907 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1908 FLOW_DISSECTOR_KEY_HASH, hash); 1909 1910 skb_flow_dissector_init(dissector, keys, cnt); 1911 } 1912 1913 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1914 struct fl_flow_mask *mask) 1915 { 1916 struct fl_flow_mask *newmask; 1917 int err; 1918 1919 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1920 if (!newmask) 1921 return ERR_PTR(-ENOMEM); 1922 1923 fl_mask_copy(newmask, mask); 1924 1925 if ((newmask->key.tp_range.tp_min.dst && 1926 newmask->key.tp_range.tp_max.dst) || 1927 (newmask->key.tp_range.tp_min.src && 1928 newmask->key.tp_range.tp_max.src)) 1929 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1930 1931 err = fl_init_mask_hashtable(newmask); 1932 if (err) 1933 goto errout_free; 1934 1935 fl_init_dissector(&newmask->dissector, &newmask->key); 1936 1937 INIT_LIST_HEAD_RCU(&newmask->filters); 1938 1939 refcount_set(&newmask->refcnt, 1); 1940 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1941 &newmask->ht_node, mask_ht_params); 1942 if (err) 1943 goto errout_destroy; 1944 1945 spin_lock(&head->masks_lock); 1946 list_add_tail_rcu(&newmask->list, &head->masks); 1947 spin_unlock(&head->masks_lock); 1948 1949 return newmask; 1950 1951 errout_destroy: 1952 rhashtable_destroy(&newmask->ht); 1953 errout_free: 1954 kfree(newmask); 1955 1956 return ERR_PTR(err); 1957 } 1958 1959 static int fl_check_assign_mask(struct cls_fl_head *head, 1960 struct cls_fl_filter *fnew, 1961 struct cls_fl_filter *fold, 1962 struct fl_flow_mask *mask) 1963 { 1964 struct fl_flow_mask *newmask; 1965 int ret = 0; 1966 1967 rcu_read_lock(); 1968 1969 /* Insert mask as temporary node to prevent concurrent creation of mask 1970 * with same key. Any concurrent lookups with same key will return 1971 * -EAGAIN because mask's refcnt is zero. 1972 */ 1973 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1974 &mask->ht_node, 1975 mask_ht_params); 1976 if (!fnew->mask) { 1977 rcu_read_unlock(); 1978 1979 if (fold) { 1980 ret = -EINVAL; 1981 goto errout_cleanup; 1982 } 1983 1984 newmask = fl_create_new_mask(head, mask); 1985 if (IS_ERR(newmask)) { 1986 ret = PTR_ERR(newmask); 1987 goto errout_cleanup; 1988 } 1989 1990 fnew->mask = newmask; 1991 return 0; 1992 } else if (IS_ERR(fnew->mask)) { 1993 ret = PTR_ERR(fnew->mask); 1994 } else if (fold && fold->mask != fnew->mask) { 1995 ret = -EINVAL; 1996 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1997 /* Mask was deleted concurrently, try again */ 1998 ret = -EAGAIN; 1999 } 2000 rcu_read_unlock(); 2001 return ret; 2002 2003 errout_cleanup: 2004 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2005 mask_ht_params); 2006 return ret; 2007 } 2008 2009 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 2010 struct cls_fl_filter *f, struct fl_flow_mask *mask, 2011 unsigned long base, struct nlattr **tb, 2012 struct nlattr *est, 2013 struct fl_flow_tmplt *tmplt, 2014 u32 flags, u32 fl_flags, 2015 struct netlink_ext_ack *extack) 2016 { 2017 int err; 2018 2019 err = tcf_exts_validate_ex(net, tp, tb, est, &f->exts, flags, 2020 fl_flags, extack); 2021 if (err < 0) 2022 return err; 2023 2024 if (tb[TCA_FLOWER_CLASSID]) { 2025 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2026 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2027 rtnl_lock(); 2028 tcf_bind_filter(tp, &f->res, base); 2029 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2030 rtnl_unlock(); 2031 } 2032 2033 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 2034 if (err) 2035 return err; 2036 2037 fl_mask_update_range(mask); 2038 fl_set_masked_key(&f->mkey, &f->key, mask); 2039 2040 if (!fl_mask_fits_tmplt(tmplt, mask)) { 2041 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2042 return -EINVAL; 2043 } 2044 2045 return 0; 2046 } 2047 2048 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2049 struct cls_fl_filter *fold, 2050 bool *in_ht) 2051 { 2052 struct fl_flow_mask *mask = fnew->mask; 2053 int err; 2054 2055 err = rhashtable_lookup_insert_fast(&mask->ht, 2056 &fnew->ht_node, 2057 mask->filter_ht_params); 2058 if (err) { 2059 *in_ht = false; 2060 /* It is okay if filter with same key exists when 2061 * overwriting. 2062 */ 2063 return fold && err == -EEXIST ? 0 : err; 2064 } 2065 2066 *in_ht = true; 2067 return 0; 2068 } 2069 2070 static int fl_change(struct net *net, struct sk_buff *in_skb, 2071 struct tcf_proto *tp, unsigned long base, 2072 u32 handle, struct nlattr **tca, 2073 void **arg, u32 flags, 2074 struct netlink_ext_ack *extack) 2075 { 2076 struct cls_fl_head *head = fl_head_dereference(tp); 2077 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2078 struct cls_fl_filter *fold = *arg; 2079 struct cls_fl_filter *fnew; 2080 struct fl_flow_mask *mask; 2081 struct nlattr **tb; 2082 bool in_ht; 2083 int err; 2084 2085 if (!tca[TCA_OPTIONS]) { 2086 err = -EINVAL; 2087 goto errout_fold; 2088 } 2089 2090 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2091 if (!mask) { 2092 err = -ENOBUFS; 2093 goto errout_fold; 2094 } 2095 2096 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2097 if (!tb) { 2098 err = -ENOBUFS; 2099 goto errout_mask_alloc; 2100 } 2101 2102 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2103 tca[TCA_OPTIONS], fl_policy, NULL); 2104 if (err < 0) 2105 goto errout_tb; 2106 2107 if (fold && handle && fold->handle != handle) { 2108 err = -EINVAL; 2109 goto errout_tb; 2110 } 2111 2112 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2113 if (!fnew) { 2114 err = -ENOBUFS; 2115 goto errout_tb; 2116 } 2117 INIT_LIST_HEAD(&fnew->hw_list); 2118 refcount_set(&fnew->refcnt, 1); 2119 2120 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 2121 if (err < 0) 2122 goto errout; 2123 2124 if (tb[TCA_FLOWER_FLAGS]) { 2125 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2126 2127 if (!tc_flags_valid(fnew->flags)) { 2128 err = -EINVAL; 2129 goto errout; 2130 } 2131 } 2132 2133 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], 2134 tp->chain->tmplt_priv, flags, fnew->flags, 2135 extack); 2136 if (err) 2137 goto errout; 2138 2139 err = fl_check_assign_mask(head, fnew, fold, mask); 2140 if (err) 2141 goto errout; 2142 2143 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2144 if (err) 2145 goto errout_mask; 2146 2147 if (!tc_skip_hw(fnew->flags)) { 2148 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2149 if (err) 2150 goto errout_ht; 2151 } 2152 2153 if (!tc_in_hw(fnew->flags)) 2154 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2155 2156 spin_lock(&tp->lock); 2157 2158 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2159 * proto again or create new one, if necessary. 2160 */ 2161 if (tp->deleting) { 2162 err = -EAGAIN; 2163 goto errout_hw; 2164 } 2165 2166 if (fold) { 2167 /* Fold filter was deleted concurrently. Retry lookup. */ 2168 if (fold->deleted) { 2169 err = -EAGAIN; 2170 goto errout_hw; 2171 } 2172 2173 fnew->handle = handle; 2174 2175 if (!in_ht) { 2176 struct rhashtable_params params = 2177 fnew->mask->filter_ht_params; 2178 2179 err = rhashtable_insert_fast(&fnew->mask->ht, 2180 &fnew->ht_node, 2181 params); 2182 if (err) 2183 goto errout_hw; 2184 in_ht = true; 2185 } 2186 2187 refcount_inc(&fnew->refcnt); 2188 rhashtable_remove_fast(&fold->mask->ht, 2189 &fold->ht_node, 2190 fold->mask->filter_ht_params); 2191 idr_replace(&head->handle_idr, fnew, fnew->handle); 2192 list_replace_rcu(&fold->list, &fnew->list); 2193 fold->deleted = true; 2194 2195 spin_unlock(&tp->lock); 2196 2197 fl_mask_put(head, fold->mask); 2198 if (!tc_skip_hw(fold->flags)) 2199 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2200 tcf_unbind_filter(tp, &fold->res); 2201 /* Caller holds reference to fold, so refcnt is always > 0 2202 * after this. 2203 */ 2204 refcount_dec(&fold->refcnt); 2205 __fl_put(fold); 2206 } else { 2207 if (handle) { 2208 /* user specifies a handle and it doesn't exist */ 2209 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2210 handle, GFP_ATOMIC); 2211 2212 /* Filter with specified handle was concurrently 2213 * inserted after initial check in cls_api. This is not 2214 * necessarily an error if NLM_F_EXCL is not set in 2215 * message flags. Returning EAGAIN will cause cls_api to 2216 * try to update concurrently inserted rule. 2217 */ 2218 if (err == -ENOSPC) 2219 err = -EAGAIN; 2220 } else { 2221 handle = 1; 2222 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2223 INT_MAX, GFP_ATOMIC); 2224 } 2225 if (err) 2226 goto errout_hw; 2227 2228 refcount_inc(&fnew->refcnt); 2229 fnew->handle = handle; 2230 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2231 spin_unlock(&tp->lock); 2232 } 2233 2234 *arg = fnew; 2235 2236 kfree(tb); 2237 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2238 return 0; 2239 2240 errout_ht: 2241 spin_lock(&tp->lock); 2242 errout_hw: 2243 fnew->deleted = true; 2244 spin_unlock(&tp->lock); 2245 if (!tc_skip_hw(fnew->flags)) 2246 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2247 if (in_ht) 2248 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2249 fnew->mask->filter_ht_params); 2250 errout_mask: 2251 fl_mask_put(head, fnew->mask); 2252 errout: 2253 __fl_put(fnew); 2254 errout_tb: 2255 kfree(tb); 2256 errout_mask_alloc: 2257 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2258 errout_fold: 2259 if (fold) 2260 __fl_put(fold); 2261 return err; 2262 } 2263 2264 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2265 bool rtnl_held, struct netlink_ext_ack *extack) 2266 { 2267 struct cls_fl_head *head = fl_head_dereference(tp); 2268 struct cls_fl_filter *f = arg; 2269 bool last_on_mask; 2270 int err = 0; 2271 2272 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2273 *last = list_empty(&head->masks); 2274 __fl_put(f); 2275 2276 return err; 2277 } 2278 2279 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2280 bool rtnl_held) 2281 { 2282 struct cls_fl_head *head = fl_head_dereference(tp); 2283 unsigned long id = arg->cookie, tmp; 2284 struct cls_fl_filter *f; 2285 2286 arg->count = arg->skip; 2287 2288 rcu_read_lock(); 2289 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2290 /* don't return filters that are being deleted */ 2291 if (!refcount_inc_not_zero(&f->refcnt)) 2292 continue; 2293 rcu_read_unlock(); 2294 2295 if (arg->fn(tp, f, arg) < 0) { 2296 __fl_put(f); 2297 arg->stop = 1; 2298 rcu_read_lock(); 2299 break; 2300 } 2301 __fl_put(f); 2302 arg->count++; 2303 rcu_read_lock(); 2304 } 2305 rcu_read_unlock(); 2306 arg->cookie = id; 2307 } 2308 2309 static struct cls_fl_filter * 2310 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2311 { 2312 struct cls_fl_head *head = fl_head_dereference(tp); 2313 2314 spin_lock(&tp->lock); 2315 if (list_empty(&head->hw_filters)) { 2316 spin_unlock(&tp->lock); 2317 return NULL; 2318 } 2319 2320 if (!f) 2321 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2322 hw_list); 2323 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2324 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2325 spin_unlock(&tp->lock); 2326 return f; 2327 } 2328 } 2329 2330 spin_unlock(&tp->lock); 2331 return NULL; 2332 } 2333 2334 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2335 void *cb_priv, struct netlink_ext_ack *extack) 2336 { 2337 struct tcf_block *block = tp->chain->block; 2338 struct flow_cls_offload cls_flower = {}; 2339 struct cls_fl_filter *f = NULL; 2340 int err; 2341 2342 /* hw_filters list can only be changed by hw offload functions after 2343 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2344 * iterating it. 2345 */ 2346 ASSERT_RTNL(); 2347 2348 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2349 cls_flower.rule = 2350 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2351 if (!cls_flower.rule) { 2352 __fl_put(f); 2353 return -ENOMEM; 2354 } 2355 2356 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2357 extack); 2358 cls_flower.command = add ? 2359 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2360 cls_flower.cookie = (unsigned long)f; 2361 cls_flower.rule->match.dissector = &f->mask->dissector; 2362 cls_flower.rule->match.mask = &f->mask->key; 2363 cls_flower.rule->match.key = &f->mkey; 2364 2365 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts); 2366 if (err) { 2367 kfree(cls_flower.rule); 2368 if (tc_skip_sw(f->flags)) { 2369 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 2370 __fl_put(f); 2371 return err; 2372 } 2373 goto next_flow; 2374 } 2375 2376 cls_flower.classid = f->res.classid; 2377 2378 err = tc_setup_cb_reoffload(block, tp, add, cb, 2379 TC_SETUP_CLSFLOWER, &cls_flower, 2380 cb_priv, &f->flags, 2381 &f->in_hw_count); 2382 tc_cleanup_offload_action(&cls_flower.rule->action); 2383 kfree(cls_flower.rule); 2384 2385 if (err) { 2386 __fl_put(f); 2387 return err; 2388 } 2389 next_flow: 2390 __fl_put(f); 2391 } 2392 2393 return 0; 2394 } 2395 2396 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2397 { 2398 struct flow_cls_offload *cls_flower = type_data; 2399 struct cls_fl_filter *f = 2400 (struct cls_fl_filter *) cls_flower->cookie; 2401 struct cls_fl_head *head = fl_head_dereference(tp); 2402 2403 spin_lock(&tp->lock); 2404 list_add(&f->hw_list, &head->hw_filters); 2405 spin_unlock(&tp->lock); 2406 } 2407 2408 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2409 { 2410 struct flow_cls_offload *cls_flower = type_data; 2411 struct cls_fl_filter *f = 2412 (struct cls_fl_filter *) cls_flower->cookie; 2413 2414 spin_lock(&tp->lock); 2415 if (!list_empty(&f->hw_list)) 2416 list_del_init(&f->hw_list); 2417 spin_unlock(&tp->lock); 2418 } 2419 2420 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2421 struct fl_flow_tmplt *tmplt) 2422 { 2423 struct flow_cls_offload cls_flower = {}; 2424 struct tcf_block *block = chain->block; 2425 2426 cls_flower.rule = flow_rule_alloc(0); 2427 if (!cls_flower.rule) 2428 return -ENOMEM; 2429 2430 cls_flower.common.chain_index = chain->index; 2431 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2432 cls_flower.cookie = (unsigned long) tmplt; 2433 cls_flower.rule->match.dissector = &tmplt->dissector; 2434 cls_flower.rule->match.mask = &tmplt->mask; 2435 cls_flower.rule->match.key = &tmplt->dummy_key; 2436 2437 /* We don't care if driver (any of them) fails to handle this 2438 * call. It serves just as a hint for it. 2439 */ 2440 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2441 kfree(cls_flower.rule); 2442 2443 return 0; 2444 } 2445 2446 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2447 struct fl_flow_tmplt *tmplt) 2448 { 2449 struct flow_cls_offload cls_flower = {}; 2450 struct tcf_block *block = chain->block; 2451 2452 cls_flower.common.chain_index = chain->index; 2453 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2454 cls_flower.cookie = (unsigned long) tmplt; 2455 2456 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2457 } 2458 2459 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2460 struct nlattr **tca, 2461 struct netlink_ext_ack *extack) 2462 { 2463 struct fl_flow_tmplt *tmplt; 2464 struct nlattr **tb; 2465 int err; 2466 2467 if (!tca[TCA_OPTIONS]) 2468 return ERR_PTR(-EINVAL); 2469 2470 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2471 if (!tb) 2472 return ERR_PTR(-ENOBUFS); 2473 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2474 tca[TCA_OPTIONS], fl_policy, NULL); 2475 if (err) 2476 goto errout_tb; 2477 2478 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2479 if (!tmplt) { 2480 err = -ENOMEM; 2481 goto errout_tb; 2482 } 2483 tmplt->chain = chain; 2484 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2485 if (err) 2486 goto errout_tmplt; 2487 2488 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2489 2490 err = fl_hw_create_tmplt(chain, tmplt); 2491 if (err) 2492 goto errout_tmplt; 2493 2494 kfree(tb); 2495 return tmplt; 2496 2497 errout_tmplt: 2498 kfree(tmplt); 2499 errout_tb: 2500 kfree(tb); 2501 return ERR_PTR(err); 2502 } 2503 2504 static void fl_tmplt_destroy(void *tmplt_priv) 2505 { 2506 struct fl_flow_tmplt *tmplt = tmplt_priv; 2507 2508 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2509 kfree(tmplt); 2510 } 2511 2512 static int fl_dump_key_val(struct sk_buff *skb, 2513 void *val, int val_type, 2514 void *mask, int mask_type, int len) 2515 { 2516 int err; 2517 2518 if (!memchr_inv(mask, 0, len)) 2519 return 0; 2520 err = nla_put(skb, val_type, len, val); 2521 if (err) 2522 return err; 2523 if (mask_type != TCA_FLOWER_UNSPEC) { 2524 err = nla_put(skb, mask_type, len, mask); 2525 if (err) 2526 return err; 2527 } 2528 return 0; 2529 } 2530 2531 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2532 struct fl_flow_key *mask) 2533 { 2534 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2535 TCA_FLOWER_KEY_PORT_DST_MIN, 2536 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2537 sizeof(key->tp_range.tp_min.dst)) || 2538 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2539 TCA_FLOWER_KEY_PORT_DST_MAX, 2540 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2541 sizeof(key->tp_range.tp_max.dst)) || 2542 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2543 TCA_FLOWER_KEY_PORT_SRC_MIN, 2544 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2545 sizeof(key->tp_range.tp_min.src)) || 2546 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2547 TCA_FLOWER_KEY_PORT_SRC_MAX, 2548 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2549 sizeof(key->tp_range.tp_max.src))) 2550 return -1; 2551 2552 return 0; 2553 } 2554 2555 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2556 struct flow_dissector_key_mpls *mpls_key, 2557 struct flow_dissector_key_mpls *mpls_mask, 2558 u8 lse_index) 2559 { 2560 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2561 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2562 int err; 2563 2564 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2565 lse_index + 1); 2566 if (err) 2567 return err; 2568 2569 if (lse_mask->mpls_ttl) { 2570 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2571 lse_key->mpls_ttl); 2572 if (err) 2573 return err; 2574 } 2575 if (lse_mask->mpls_bos) { 2576 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2577 lse_key->mpls_bos); 2578 if (err) 2579 return err; 2580 } 2581 if (lse_mask->mpls_tc) { 2582 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2583 lse_key->mpls_tc); 2584 if (err) 2585 return err; 2586 } 2587 if (lse_mask->mpls_label) { 2588 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2589 lse_key->mpls_label); 2590 if (err) 2591 return err; 2592 } 2593 2594 return 0; 2595 } 2596 2597 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2598 struct flow_dissector_key_mpls *mpls_key, 2599 struct flow_dissector_key_mpls *mpls_mask) 2600 { 2601 struct nlattr *opts; 2602 struct nlattr *lse; 2603 u8 lse_index; 2604 int err; 2605 2606 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2607 if (!opts) 2608 return -EMSGSIZE; 2609 2610 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2611 if (!(mpls_mask->used_lses & 1 << lse_index)) 2612 continue; 2613 2614 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2615 if (!lse) { 2616 err = -EMSGSIZE; 2617 goto err_opts; 2618 } 2619 2620 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2621 lse_index); 2622 if (err) 2623 goto err_opts_lse; 2624 nla_nest_end(skb, lse); 2625 } 2626 nla_nest_end(skb, opts); 2627 2628 return 0; 2629 2630 err_opts_lse: 2631 nla_nest_cancel(skb, lse); 2632 err_opts: 2633 nla_nest_cancel(skb, opts); 2634 2635 return err; 2636 } 2637 2638 static int fl_dump_key_mpls(struct sk_buff *skb, 2639 struct flow_dissector_key_mpls *mpls_key, 2640 struct flow_dissector_key_mpls *mpls_mask) 2641 { 2642 struct flow_dissector_mpls_lse *lse_mask; 2643 struct flow_dissector_mpls_lse *lse_key; 2644 int err; 2645 2646 if (!mpls_mask->used_lses) 2647 return 0; 2648 2649 lse_mask = &mpls_mask->ls[0]; 2650 lse_key = &mpls_key->ls[0]; 2651 2652 /* For backward compatibility, don't use the MPLS nested attributes if 2653 * the rule can be expressed using the old attributes. 2654 */ 2655 if (mpls_mask->used_lses & ~1 || 2656 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2657 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2658 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2659 2660 if (lse_mask->mpls_ttl) { 2661 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2662 lse_key->mpls_ttl); 2663 if (err) 2664 return err; 2665 } 2666 if (lse_mask->mpls_tc) { 2667 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2668 lse_key->mpls_tc); 2669 if (err) 2670 return err; 2671 } 2672 if (lse_mask->mpls_label) { 2673 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2674 lse_key->mpls_label); 2675 if (err) 2676 return err; 2677 } 2678 if (lse_mask->mpls_bos) { 2679 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2680 lse_key->mpls_bos); 2681 if (err) 2682 return err; 2683 } 2684 return 0; 2685 } 2686 2687 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2688 struct flow_dissector_key_ip *key, 2689 struct flow_dissector_key_ip *mask) 2690 { 2691 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2692 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2693 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2694 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2695 2696 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2697 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2698 return -1; 2699 2700 return 0; 2701 } 2702 2703 static int fl_dump_key_vlan(struct sk_buff *skb, 2704 int vlan_id_key, int vlan_prio_key, 2705 struct flow_dissector_key_vlan *vlan_key, 2706 struct flow_dissector_key_vlan *vlan_mask) 2707 { 2708 int err; 2709 2710 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2711 return 0; 2712 if (vlan_mask->vlan_id) { 2713 err = nla_put_u16(skb, vlan_id_key, 2714 vlan_key->vlan_id); 2715 if (err) 2716 return err; 2717 } 2718 if (vlan_mask->vlan_priority) { 2719 err = nla_put_u8(skb, vlan_prio_key, 2720 vlan_key->vlan_priority); 2721 if (err) 2722 return err; 2723 } 2724 return 0; 2725 } 2726 2727 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2728 u32 *flower_key, u32 *flower_mask, 2729 u32 flower_flag_bit, u32 dissector_flag_bit) 2730 { 2731 if (dissector_mask & dissector_flag_bit) { 2732 *flower_mask |= flower_flag_bit; 2733 if (dissector_key & dissector_flag_bit) 2734 *flower_key |= flower_flag_bit; 2735 } 2736 } 2737 2738 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2739 { 2740 u32 key, mask; 2741 __be32 _key, _mask; 2742 int err; 2743 2744 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2745 return 0; 2746 2747 key = 0; 2748 mask = 0; 2749 2750 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2751 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2752 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2753 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2754 FLOW_DIS_FIRST_FRAG); 2755 2756 _key = cpu_to_be32(key); 2757 _mask = cpu_to_be32(mask); 2758 2759 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2760 if (err) 2761 return err; 2762 2763 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2764 } 2765 2766 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2767 struct flow_dissector_key_enc_opts *enc_opts) 2768 { 2769 struct geneve_opt *opt; 2770 struct nlattr *nest; 2771 int opt_off = 0; 2772 2773 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2774 if (!nest) 2775 goto nla_put_failure; 2776 2777 while (enc_opts->len > opt_off) { 2778 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2779 2780 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2781 opt->opt_class)) 2782 goto nla_put_failure; 2783 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2784 opt->type)) 2785 goto nla_put_failure; 2786 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2787 opt->length * 4, opt->opt_data)) 2788 goto nla_put_failure; 2789 2790 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2791 } 2792 nla_nest_end(skb, nest); 2793 return 0; 2794 2795 nla_put_failure: 2796 nla_nest_cancel(skb, nest); 2797 return -EMSGSIZE; 2798 } 2799 2800 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2801 struct flow_dissector_key_enc_opts *enc_opts) 2802 { 2803 struct vxlan_metadata *md; 2804 struct nlattr *nest; 2805 2806 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2807 if (!nest) 2808 goto nla_put_failure; 2809 2810 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2811 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2812 goto nla_put_failure; 2813 2814 nla_nest_end(skb, nest); 2815 return 0; 2816 2817 nla_put_failure: 2818 nla_nest_cancel(skb, nest); 2819 return -EMSGSIZE; 2820 } 2821 2822 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2823 struct flow_dissector_key_enc_opts *enc_opts) 2824 { 2825 struct erspan_metadata *md; 2826 struct nlattr *nest; 2827 2828 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2829 if (!nest) 2830 goto nla_put_failure; 2831 2832 md = (struct erspan_metadata *)&enc_opts->data[0]; 2833 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2834 goto nla_put_failure; 2835 2836 if (md->version == 1 && 2837 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2838 goto nla_put_failure; 2839 2840 if (md->version == 2 && 2841 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2842 md->u.md2.dir) || 2843 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2844 get_hwid(&md->u.md2)))) 2845 goto nla_put_failure; 2846 2847 nla_nest_end(skb, nest); 2848 return 0; 2849 2850 nla_put_failure: 2851 nla_nest_cancel(skb, nest); 2852 return -EMSGSIZE; 2853 } 2854 2855 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 2856 struct flow_dissector_key_enc_opts *enc_opts) 2857 2858 { 2859 struct gtp_pdu_session_info *session_info; 2860 struct nlattr *nest; 2861 2862 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 2863 if (!nest) 2864 goto nla_put_failure; 2865 2866 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 2867 2868 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 2869 session_info->pdu_type)) 2870 goto nla_put_failure; 2871 2872 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 2873 goto nla_put_failure; 2874 2875 nla_nest_end(skb, nest); 2876 return 0; 2877 2878 nla_put_failure: 2879 nla_nest_cancel(skb, nest); 2880 return -EMSGSIZE; 2881 } 2882 2883 static int fl_dump_key_ct(struct sk_buff *skb, 2884 struct flow_dissector_key_ct *key, 2885 struct flow_dissector_key_ct *mask) 2886 { 2887 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2888 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2889 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2890 sizeof(key->ct_state))) 2891 goto nla_put_failure; 2892 2893 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2894 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2895 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2896 sizeof(key->ct_zone))) 2897 goto nla_put_failure; 2898 2899 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2900 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2901 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2902 sizeof(key->ct_mark))) 2903 goto nla_put_failure; 2904 2905 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2906 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2907 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2908 sizeof(key->ct_labels))) 2909 goto nla_put_failure; 2910 2911 return 0; 2912 2913 nla_put_failure: 2914 return -EMSGSIZE; 2915 } 2916 2917 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2918 struct flow_dissector_key_enc_opts *enc_opts) 2919 { 2920 struct nlattr *nest; 2921 int err; 2922 2923 if (!enc_opts->len) 2924 return 0; 2925 2926 nest = nla_nest_start_noflag(skb, enc_opt_type); 2927 if (!nest) 2928 goto nla_put_failure; 2929 2930 switch (enc_opts->dst_opt_type) { 2931 case TUNNEL_GENEVE_OPT: 2932 err = fl_dump_key_geneve_opt(skb, enc_opts); 2933 if (err) 2934 goto nla_put_failure; 2935 break; 2936 case TUNNEL_VXLAN_OPT: 2937 err = fl_dump_key_vxlan_opt(skb, enc_opts); 2938 if (err) 2939 goto nla_put_failure; 2940 break; 2941 case TUNNEL_ERSPAN_OPT: 2942 err = fl_dump_key_erspan_opt(skb, enc_opts); 2943 if (err) 2944 goto nla_put_failure; 2945 break; 2946 case TUNNEL_GTP_OPT: 2947 err = fl_dump_key_gtp_opt(skb, enc_opts); 2948 if (err) 2949 goto nla_put_failure; 2950 break; 2951 default: 2952 goto nla_put_failure; 2953 } 2954 nla_nest_end(skb, nest); 2955 return 0; 2956 2957 nla_put_failure: 2958 nla_nest_cancel(skb, nest); 2959 return -EMSGSIZE; 2960 } 2961 2962 static int fl_dump_key_enc_opt(struct sk_buff *skb, 2963 struct flow_dissector_key_enc_opts *key_opts, 2964 struct flow_dissector_key_enc_opts *msk_opts) 2965 { 2966 int err; 2967 2968 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2969 if (err) 2970 return err; 2971 2972 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2973 } 2974 2975 static int fl_dump_key(struct sk_buff *skb, struct net *net, 2976 struct fl_flow_key *key, struct fl_flow_key *mask) 2977 { 2978 if (mask->meta.ingress_ifindex) { 2979 struct net_device *dev; 2980 2981 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 2982 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2983 goto nla_put_failure; 2984 } 2985 2986 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2987 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2988 sizeof(key->eth.dst)) || 2989 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2990 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2991 sizeof(key->eth.src)) || 2992 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2993 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2994 sizeof(key->basic.n_proto))) 2995 goto nla_put_failure; 2996 2997 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2998 goto nla_put_failure; 2999 3000 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3001 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3002 goto nla_put_failure; 3003 3004 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3005 TCA_FLOWER_KEY_CVLAN_PRIO, 3006 &key->cvlan, &mask->cvlan) || 3007 (mask->cvlan.vlan_tpid && 3008 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3009 key->cvlan.vlan_tpid))) 3010 goto nla_put_failure; 3011 3012 if (mask->basic.n_proto) { 3013 if (mask->cvlan.vlan_eth_type) { 3014 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3015 key->basic.n_proto)) 3016 goto nla_put_failure; 3017 } else if (mask->vlan.vlan_eth_type) { 3018 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3019 key->vlan.vlan_eth_type)) 3020 goto nla_put_failure; 3021 } 3022 } 3023 3024 if ((key->basic.n_proto == htons(ETH_P_IP) || 3025 key->basic.n_proto == htons(ETH_P_IPV6)) && 3026 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3027 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3028 sizeof(key->basic.ip_proto)) || 3029 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3030 goto nla_put_failure; 3031 3032 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3033 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3034 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3035 sizeof(key->ipv4.src)) || 3036 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3037 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3038 sizeof(key->ipv4.dst)))) 3039 goto nla_put_failure; 3040 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3041 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3042 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3043 sizeof(key->ipv6.src)) || 3044 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3045 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3046 sizeof(key->ipv6.dst)))) 3047 goto nla_put_failure; 3048 3049 if (key->basic.ip_proto == IPPROTO_TCP && 3050 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3051 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3052 sizeof(key->tp.src)) || 3053 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3054 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3055 sizeof(key->tp.dst)) || 3056 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3057 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3058 sizeof(key->tcp.flags)))) 3059 goto nla_put_failure; 3060 else if (key->basic.ip_proto == IPPROTO_UDP && 3061 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3062 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3063 sizeof(key->tp.src)) || 3064 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3065 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3066 sizeof(key->tp.dst)))) 3067 goto nla_put_failure; 3068 else if (key->basic.ip_proto == IPPROTO_SCTP && 3069 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3070 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3071 sizeof(key->tp.src)) || 3072 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3073 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3074 sizeof(key->tp.dst)))) 3075 goto nla_put_failure; 3076 else if (key->basic.n_proto == htons(ETH_P_IP) && 3077 key->basic.ip_proto == IPPROTO_ICMP && 3078 (fl_dump_key_val(skb, &key->icmp.type, 3079 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3080 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3081 sizeof(key->icmp.type)) || 3082 fl_dump_key_val(skb, &key->icmp.code, 3083 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3084 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3085 sizeof(key->icmp.code)))) 3086 goto nla_put_failure; 3087 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3088 key->basic.ip_proto == IPPROTO_ICMPV6 && 3089 (fl_dump_key_val(skb, &key->icmp.type, 3090 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3091 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3092 sizeof(key->icmp.type)) || 3093 fl_dump_key_val(skb, &key->icmp.code, 3094 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3095 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3096 sizeof(key->icmp.code)))) 3097 goto nla_put_failure; 3098 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3099 key->basic.n_proto == htons(ETH_P_RARP)) && 3100 (fl_dump_key_val(skb, &key->arp.sip, 3101 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3102 TCA_FLOWER_KEY_ARP_SIP_MASK, 3103 sizeof(key->arp.sip)) || 3104 fl_dump_key_val(skb, &key->arp.tip, 3105 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3106 TCA_FLOWER_KEY_ARP_TIP_MASK, 3107 sizeof(key->arp.tip)) || 3108 fl_dump_key_val(skb, &key->arp.op, 3109 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3110 TCA_FLOWER_KEY_ARP_OP_MASK, 3111 sizeof(key->arp.op)) || 3112 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3113 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3114 sizeof(key->arp.sha)) || 3115 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3116 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3117 sizeof(key->arp.tha)))) 3118 goto nla_put_failure; 3119 3120 if ((key->basic.ip_proto == IPPROTO_TCP || 3121 key->basic.ip_proto == IPPROTO_UDP || 3122 key->basic.ip_proto == IPPROTO_SCTP) && 3123 fl_dump_key_port_range(skb, key, mask)) 3124 goto nla_put_failure; 3125 3126 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3127 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3128 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3129 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3130 sizeof(key->enc_ipv4.src)) || 3131 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3132 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3133 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3134 sizeof(key->enc_ipv4.dst)))) 3135 goto nla_put_failure; 3136 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3137 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3138 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3139 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3140 sizeof(key->enc_ipv6.src)) || 3141 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3142 TCA_FLOWER_KEY_ENC_IPV6_DST, 3143 &mask->enc_ipv6.dst, 3144 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3145 sizeof(key->enc_ipv6.dst)))) 3146 goto nla_put_failure; 3147 3148 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3149 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3150 sizeof(key->enc_key_id)) || 3151 fl_dump_key_val(skb, &key->enc_tp.src, 3152 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3153 &mask->enc_tp.src, 3154 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3155 sizeof(key->enc_tp.src)) || 3156 fl_dump_key_val(skb, &key->enc_tp.dst, 3157 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3158 &mask->enc_tp.dst, 3159 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3160 sizeof(key->enc_tp.dst)) || 3161 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3162 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3163 goto nla_put_failure; 3164 3165 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3166 goto nla_put_failure; 3167 3168 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3169 goto nla_put_failure; 3170 3171 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3172 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3173 sizeof(key->hash.hash))) 3174 goto nla_put_failure; 3175 3176 return 0; 3177 3178 nla_put_failure: 3179 return -EMSGSIZE; 3180 } 3181 3182 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3183 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3184 { 3185 struct cls_fl_filter *f = fh; 3186 struct nlattr *nest; 3187 struct fl_flow_key *key, *mask; 3188 bool skip_hw; 3189 3190 if (!f) 3191 return skb->len; 3192 3193 t->tcm_handle = f->handle; 3194 3195 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3196 if (!nest) 3197 goto nla_put_failure; 3198 3199 spin_lock(&tp->lock); 3200 3201 if (f->res.classid && 3202 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3203 goto nla_put_failure_locked; 3204 3205 key = &f->key; 3206 mask = &f->mask->key; 3207 skip_hw = tc_skip_hw(f->flags); 3208 3209 if (fl_dump_key(skb, net, key, mask)) 3210 goto nla_put_failure_locked; 3211 3212 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3213 goto nla_put_failure_locked; 3214 3215 spin_unlock(&tp->lock); 3216 3217 if (!skip_hw) 3218 fl_hw_update_stats(tp, f, rtnl_held); 3219 3220 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3221 goto nla_put_failure; 3222 3223 if (tcf_exts_dump(skb, &f->exts)) 3224 goto nla_put_failure; 3225 3226 nla_nest_end(skb, nest); 3227 3228 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3229 goto nla_put_failure; 3230 3231 return skb->len; 3232 3233 nla_put_failure_locked: 3234 spin_unlock(&tp->lock); 3235 nla_put_failure: 3236 nla_nest_cancel(skb, nest); 3237 return -1; 3238 } 3239 3240 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3241 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3242 { 3243 struct cls_fl_filter *f = fh; 3244 struct nlattr *nest; 3245 bool skip_hw; 3246 3247 if (!f) 3248 return skb->len; 3249 3250 t->tcm_handle = f->handle; 3251 3252 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3253 if (!nest) 3254 goto nla_put_failure; 3255 3256 spin_lock(&tp->lock); 3257 3258 skip_hw = tc_skip_hw(f->flags); 3259 3260 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3261 goto nla_put_failure_locked; 3262 3263 spin_unlock(&tp->lock); 3264 3265 if (!skip_hw) 3266 fl_hw_update_stats(tp, f, rtnl_held); 3267 3268 if (tcf_exts_terse_dump(skb, &f->exts)) 3269 goto nla_put_failure; 3270 3271 nla_nest_end(skb, nest); 3272 3273 return skb->len; 3274 3275 nla_put_failure_locked: 3276 spin_unlock(&tp->lock); 3277 nla_put_failure: 3278 nla_nest_cancel(skb, nest); 3279 return -1; 3280 } 3281 3282 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3283 { 3284 struct fl_flow_tmplt *tmplt = tmplt_priv; 3285 struct fl_flow_key *key, *mask; 3286 struct nlattr *nest; 3287 3288 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3289 if (!nest) 3290 goto nla_put_failure; 3291 3292 key = &tmplt->dummy_key; 3293 mask = &tmplt->mask; 3294 3295 if (fl_dump_key(skb, net, key, mask)) 3296 goto nla_put_failure; 3297 3298 nla_nest_end(skb, nest); 3299 3300 return skb->len; 3301 3302 nla_put_failure: 3303 nla_nest_cancel(skb, nest); 3304 return -EMSGSIZE; 3305 } 3306 3307 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3308 unsigned long base) 3309 { 3310 struct cls_fl_filter *f = fh; 3311 3312 if (f && f->res.classid == classid) { 3313 if (cl) 3314 __tcf_bind_filter(q, &f->res, base); 3315 else 3316 __tcf_unbind_filter(q, &f->res); 3317 } 3318 } 3319 3320 static bool fl_delete_empty(struct tcf_proto *tp) 3321 { 3322 struct cls_fl_head *head = fl_head_dereference(tp); 3323 3324 spin_lock(&tp->lock); 3325 tp->deleting = idr_is_empty(&head->handle_idr); 3326 spin_unlock(&tp->lock); 3327 3328 return tp->deleting; 3329 } 3330 3331 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3332 .kind = "flower", 3333 .classify = fl_classify, 3334 .init = fl_init, 3335 .destroy = fl_destroy, 3336 .get = fl_get, 3337 .put = fl_put, 3338 .change = fl_change, 3339 .delete = fl_delete, 3340 .delete_empty = fl_delete_empty, 3341 .walk = fl_walk, 3342 .reoffload = fl_reoffload, 3343 .hw_add = fl_hw_add, 3344 .hw_del = fl_hw_del, 3345 .dump = fl_dump, 3346 .terse_dump = fl_terse_dump, 3347 .bind_class = fl_bind_class, 3348 .tmplt_create = fl_tmplt_create, 3349 .tmplt_destroy = fl_tmplt_destroy, 3350 .tmplt_dump = fl_tmplt_dump, 3351 .owner = THIS_MODULE, 3352 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3353 }; 3354 3355 static int __init cls_fl_init(void) 3356 { 3357 return register_tcf_proto_ops(&cls_fl_ops); 3358 } 3359 3360 static void __exit cls_fl_exit(void) 3361 { 3362 unregister_tcf_proto_ops(&cls_fl_ops); 3363 } 3364 3365 module_init(cls_fl_init); 3366 module_exit(cls_fl_exit); 3367 3368 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3369 MODULE_DESCRIPTION("Flower classifier"); 3370 MODULE_LICENSE("GPL v2"); 3371