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 #include <linux/bitfield.h> 15 16 #include <linux/if_ether.h> 17 #include <linux/in6.h> 18 #include <linux/ip.h> 19 #include <linux/mpls.h> 20 #include <linux/ppp_defs.h> 21 22 #include <net/sch_generic.h> 23 #include <net/pkt_cls.h> 24 #include <net/pkt_sched.h> 25 #include <net/ip.h> 26 #include <net/flow_dissector.h> 27 #include <net/geneve.h> 28 #include <net/vxlan.h> 29 #include <net/erspan.h> 30 #include <net/gtp.h> 31 #include <net/pfcp.h> 32 #include <net/tc_wrapper.h> 33 34 #include <net/dst.h> 35 #include <net/dst_metadata.h> 36 37 #include <uapi/linux/netfilter/nf_conntrack_common.h> 38 39 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 40 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 41 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 42 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 43 44 #define TCA_FLOWER_KEY_FLAGS_POLICY_MASK \ 45 (TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT | \ 46 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST) 47 48 #define TCA_FLOWER_KEY_ENC_FLAGS_POLICY_MASK \ 49 (TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM | \ 50 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT | \ 51 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM | \ 52 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT) 53 54 struct fl_flow_key { 55 struct flow_dissector_key_meta meta; 56 struct flow_dissector_key_control control; 57 struct flow_dissector_key_control enc_control; 58 struct flow_dissector_key_basic basic; 59 struct flow_dissector_key_eth_addrs eth; 60 struct flow_dissector_key_vlan vlan; 61 struct flow_dissector_key_vlan cvlan; 62 union { 63 struct flow_dissector_key_ipv4_addrs ipv4; 64 struct flow_dissector_key_ipv6_addrs ipv6; 65 }; 66 struct flow_dissector_key_ports tp; 67 struct flow_dissector_key_icmp icmp; 68 struct flow_dissector_key_arp arp; 69 struct flow_dissector_key_keyid enc_key_id; 70 union { 71 struct flow_dissector_key_ipv4_addrs enc_ipv4; 72 struct flow_dissector_key_ipv6_addrs enc_ipv6; 73 }; 74 struct flow_dissector_key_ports enc_tp; 75 struct flow_dissector_key_mpls mpls; 76 struct flow_dissector_key_tcp tcp; 77 struct flow_dissector_key_ip ip; 78 struct flow_dissector_key_ip enc_ip; 79 struct flow_dissector_key_enc_opts enc_opts; 80 struct flow_dissector_key_ports_range tp_range; 81 struct flow_dissector_key_ct ct; 82 struct flow_dissector_key_hash hash; 83 struct flow_dissector_key_num_of_vlans num_of_vlans; 84 struct flow_dissector_key_pppoe pppoe; 85 struct flow_dissector_key_l2tpv3 l2tpv3; 86 struct flow_dissector_key_ipsec ipsec; 87 struct flow_dissector_key_cfm cfm; 88 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 89 90 struct fl_flow_mask_range { 91 unsigned short int start; 92 unsigned short int end; 93 }; 94 95 struct fl_flow_mask { 96 struct fl_flow_key key; 97 struct fl_flow_mask_range range; 98 u32 flags; 99 struct rhash_head ht_node; 100 struct rhashtable ht; 101 struct rhashtable_params filter_ht_params; 102 struct flow_dissector dissector; 103 struct list_head filters; 104 struct rcu_work rwork; 105 struct list_head list; 106 refcount_t refcnt; 107 }; 108 109 struct fl_flow_tmplt { 110 struct fl_flow_key dummy_key; 111 struct fl_flow_key mask; 112 struct flow_dissector dissector; 113 struct tcf_chain *chain; 114 }; 115 116 struct cls_fl_head { 117 struct rhashtable ht; 118 spinlock_t masks_lock; /* Protect masks list */ 119 struct list_head masks; 120 struct list_head hw_filters; 121 struct rcu_work rwork; 122 struct idr handle_idr; 123 }; 124 125 struct cls_fl_filter { 126 struct fl_flow_mask *mask; 127 struct rhash_head ht_node; 128 struct fl_flow_key mkey; 129 struct tcf_exts exts; 130 struct tcf_result res; 131 struct fl_flow_key key; 132 struct list_head list; 133 struct list_head hw_list; 134 u32 handle; 135 u32 flags; 136 u32 in_hw_count; 137 u8 needs_tc_skb_ext:1; 138 struct rcu_work rwork; 139 struct net_device *hw_dev; 140 /* Flower classifier is unlocked, which means that its reference counter 141 * can be changed concurrently without any kind of external 142 * synchronization. Use atomic reference counter to be concurrency-safe. 143 */ 144 refcount_t refcnt; 145 bool deleted; 146 }; 147 148 static const struct rhashtable_params mask_ht_params = { 149 .key_offset = offsetof(struct fl_flow_mask, key), 150 .key_len = sizeof(struct fl_flow_key), 151 .head_offset = offsetof(struct fl_flow_mask, ht_node), 152 .automatic_shrinking = true, 153 }; 154 155 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 156 { 157 return mask->range.end - mask->range.start; 158 } 159 160 static void fl_mask_update_range(struct fl_flow_mask *mask) 161 { 162 const u8 *bytes = (const u8 *) &mask->key; 163 size_t size = sizeof(mask->key); 164 size_t i, first = 0, last; 165 166 for (i = 0; i < size; i++) { 167 if (bytes[i]) { 168 first = i; 169 break; 170 } 171 } 172 last = first; 173 for (i = size - 1; i != first; i--) { 174 if (bytes[i]) { 175 last = i; 176 break; 177 } 178 } 179 mask->range.start = rounddown(first, sizeof(long)); 180 mask->range.end = roundup(last + 1, sizeof(long)); 181 } 182 183 static void *fl_key_get_start(struct fl_flow_key *key, 184 const struct fl_flow_mask *mask) 185 { 186 return (u8 *) key + mask->range.start; 187 } 188 189 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 190 struct fl_flow_mask *mask) 191 { 192 const long *lkey = fl_key_get_start(key, mask); 193 const long *lmask = fl_key_get_start(&mask->key, mask); 194 long *lmkey = fl_key_get_start(mkey, mask); 195 int i; 196 197 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 198 *lmkey++ = *lkey++ & *lmask++; 199 } 200 201 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 202 struct fl_flow_mask *mask) 203 { 204 const long *lmask = fl_key_get_start(&mask->key, mask); 205 const long *ltmplt; 206 int i; 207 208 if (!tmplt) 209 return true; 210 ltmplt = fl_key_get_start(&tmplt->mask, mask); 211 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 212 if (~*ltmplt++ & *lmask++) 213 return false; 214 } 215 return true; 216 } 217 218 static void fl_clear_masked_range(struct fl_flow_key *key, 219 struct fl_flow_mask *mask) 220 { 221 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 222 } 223 224 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 225 struct fl_flow_key *key, 226 struct fl_flow_key *mkey) 227 { 228 u16 min_mask, max_mask, min_val, max_val; 229 230 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 231 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 232 min_val = ntohs(filter->key.tp_range.tp_min.dst); 233 max_val = ntohs(filter->key.tp_range.tp_max.dst); 234 235 if (min_mask && max_mask) { 236 if (ntohs(key->tp_range.tp.dst) < min_val || 237 ntohs(key->tp_range.tp.dst) > max_val) 238 return false; 239 240 /* skb does not have min and max values */ 241 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 242 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 243 } 244 return true; 245 } 246 247 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 248 struct fl_flow_key *key, 249 struct fl_flow_key *mkey) 250 { 251 u16 min_mask, max_mask, min_val, max_val; 252 253 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 254 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 255 min_val = ntohs(filter->key.tp_range.tp_min.src); 256 max_val = ntohs(filter->key.tp_range.tp_max.src); 257 258 if (min_mask && max_mask) { 259 if (ntohs(key->tp_range.tp.src) < min_val || 260 ntohs(key->tp_range.tp.src) > max_val) 261 return false; 262 263 /* skb does not have min and max values */ 264 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 265 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 266 } 267 return true; 268 } 269 270 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 271 struct fl_flow_key *mkey) 272 { 273 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 274 mask->filter_ht_params); 275 } 276 277 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 278 struct fl_flow_key *mkey, 279 struct fl_flow_key *key) 280 { 281 struct cls_fl_filter *filter, *f; 282 283 list_for_each_entry_rcu(filter, &mask->filters, list) { 284 if (!fl_range_port_dst_cmp(filter, key, mkey)) 285 continue; 286 287 if (!fl_range_port_src_cmp(filter, key, mkey)) 288 continue; 289 290 f = __fl_lookup(mask, mkey); 291 if (f) 292 return f; 293 } 294 return NULL; 295 } 296 297 static noinline_for_stack 298 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 299 { 300 struct fl_flow_key mkey; 301 302 fl_set_masked_key(&mkey, key, mask); 303 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 304 return fl_lookup_range(mask, &mkey, key); 305 306 return __fl_lookup(mask, &mkey); 307 } 308 309 static u16 fl_ct_info_to_flower_map[] = { 310 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 311 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 312 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 313 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 314 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 315 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 316 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 317 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 318 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 319 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 320 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 321 TCA_FLOWER_KEY_CT_FLAGS_NEW, 322 }; 323 324 TC_INDIRECT_SCOPE int fl_classify(struct sk_buff *skb, 325 const struct tcf_proto *tp, 326 struct tcf_result *res) 327 { 328 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 329 bool post_ct = tc_skb_cb(skb)->post_ct; 330 u16 zone = tc_skb_cb(skb)->zone; 331 struct fl_flow_key skb_key; 332 struct fl_flow_mask *mask; 333 struct cls_fl_filter *f; 334 335 list_for_each_entry_rcu(mask, &head->masks, list) { 336 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 337 fl_clear_masked_range(&skb_key, mask); 338 339 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 340 /* skb_flow_dissect() does not set n_proto in case an unknown 341 * protocol, so do it rather here. 342 */ 343 skb_key.basic.n_proto = skb_protocol(skb, false); 344 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 345 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 346 fl_ct_info_to_flower_map, 347 ARRAY_SIZE(fl_ct_info_to_flower_map), 348 post_ct, zone); 349 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 350 skb_flow_dissect(skb, &mask->dissector, &skb_key, 351 FLOW_DISSECTOR_F_STOP_BEFORE_ENCAP); 352 353 f = fl_mask_lookup(mask, &skb_key); 354 if (f && !tc_skip_sw(f->flags)) { 355 *res = f->res; 356 return tcf_exts_exec(skb, &f->exts, res); 357 } 358 } 359 return -1; 360 } 361 362 static int fl_init(struct tcf_proto *tp) 363 { 364 struct cls_fl_head *head; 365 366 head = kzalloc(sizeof(*head), GFP_KERNEL); 367 if (!head) 368 return -ENOBUFS; 369 370 spin_lock_init(&head->masks_lock); 371 INIT_LIST_HEAD_RCU(&head->masks); 372 INIT_LIST_HEAD(&head->hw_filters); 373 rcu_assign_pointer(tp->root, head); 374 idr_init(&head->handle_idr); 375 376 return rhashtable_init(&head->ht, &mask_ht_params); 377 } 378 379 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 380 { 381 /* temporary masks don't have their filters list and ht initialized */ 382 if (mask_init_done) { 383 WARN_ON(!list_empty(&mask->filters)); 384 rhashtable_destroy(&mask->ht); 385 } 386 kfree(mask); 387 } 388 389 static void fl_mask_free_work(struct work_struct *work) 390 { 391 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 392 struct fl_flow_mask, rwork); 393 394 fl_mask_free(mask, true); 395 } 396 397 static void fl_uninit_mask_free_work(struct work_struct *work) 398 { 399 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 400 struct fl_flow_mask, rwork); 401 402 fl_mask_free(mask, false); 403 } 404 405 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 406 { 407 if (!refcount_dec_and_test(&mask->refcnt)) 408 return false; 409 410 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 411 412 spin_lock(&head->masks_lock); 413 list_del_rcu(&mask->list); 414 spin_unlock(&head->masks_lock); 415 416 tcf_queue_work(&mask->rwork, fl_mask_free_work); 417 418 return true; 419 } 420 421 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 422 { 423 /* Flower classifier only changes root pointer during init and destroy. 424 * Users must obtain reference to tcf_proto instance before calling its 425 * API, so tp->root pointer is protected from concurrent call to 426 * fl_destroy() by reference counting. 427 */ 428 return rcu_dereference_raw(tp->root); 429 } 430 431 static void __fl_destroy_filter(struct cls_fl_filter *f) 432 { 433 if (f->needs_tc_skb_ext) 434 tc_skb_ext_tc_disable(); 435 tcf_exts_destroy(&f->exts); 436 tcf_exts_put_net(&f->exts); 437 kfree(f); 438 } 439 440 static void fl_destroy_filter_work(struct work_struct *work) 441 { 442 struct cls_fl_filter *f = container_of(to_rcu_work(work), 443 struct cls_fl_filter, rwork); 444 445 __fl_destroy_filter(f); 446 } 447 448 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 449 bool rtnl_held, struct netlink_ext_ack *extack) 450 { 451 struct tcf_block *block = tp->chain->block; 452 struct flow_cls_offload cls_flower = {}; 453 454 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 455 cls_flower.command = FLOW_CLS_DESTROY; 456 cls_flower.cookie = (unsigned long) f; 457 458 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 459 &f->flags, &f->in_hw_count, rtnl_held); 460 461 } 462 463 static int fl_hw_replace_filter(struct tcf_proto *tp, 464 struct cls_fl_filter *f, bool rtnl_held, 465 struct netlink_ext_ack *extack) 466 { 467 struct tcf_block *block = tp->chain->block; 468 struct flow_cls_offload cls_flower = {}; 469 bool skip_sw = tc_skip_sw(f->flags); 470 int err = 0; 471 472 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 473 if (!cls_flower.rule) 474 return -ENOMEM; 475 476 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 477 cls_flower.command = FLOW_CLS_REPLACE; 478 cls_flower.cookie = (unsigned long) f; 479 cls_flower.rule->match.dissector = &f->mask->dissector; 480 cls_flower.rule->match.mask = &f->mask->key; 481 cls_flower.rule->match.key = &f->mkey; 482 cls_flower.classid = f->res.classid; 483 484 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 485 cls_flower.common.extack); 486 if (err) { 487 kfree(cls_flower.rule); 488 489 return skip_sw ? err : 0; 490 } 491 492 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 493 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 494 tc_cleanup_offload_action(&cls_flower.rule->action); 495 kfree(cls_flower.rule); 496 497 if (err) { 498 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 499 return err; 500 } 501 502 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 503 return -EINVAL; 504 505 return 0; 506 } 507 508 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 509 bool rtnl_held) 510 { 511 struct tcf_block *block = tp->chain->block; 512 struct flow_cls_offload cls_flower = {}; 513 514 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 515 cls_flower.command = FLOW_CLS_STATS; 516 cls_flower.cookie = (unsigned long) f; 517 cls_flower.classid = f->res.classid; 518 519 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 520 rtnl_held); 521 522 tcf_exts_hw_stats_update(&f->exts, &cls_flower.stats, cls_flower.use_act_stats); 523 } 524 525 static void __fl_put(struct cls_fl_filter *f) 526 { 527 if (!refcount_dec_and_test(&f->refcnt)) 528 return; 529 530 if (tcf_exts_get_net(&f->exts)) 531 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 532 else 533 __fl_destroy_filter(f); 534 } 535 536 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 537 { 538 struct cls_fl_filter *f; 539 540 rcu_read_lock(); 541 f = idr_find(&head->handle_idr, handle); 542 if (f && !refcount_inc_not_zero(&f->refcnt)) 543 f = NULL; 544 rcu_read_unlock(); 545 546 return f; 547 } 548 549 static struct tcf_exts *fl_get_exts(const struct tcf_proto *tp, u32 handle) 550 { 551 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 552 struct cls_fl_filter *f; 553 554 f = idr_find(&head->handle_idr, handle); 555 return f ? &f->exts : NULL; 556 } 557 558 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 559 bool *last, bool rtnl_held, 560 struct netlink_ext_ack *extack) 561 { 562 struct cls_fl_head *head = fl_head_dereference(tp); 563 564 *last = false; 565 566 spin_lock(&tp->lock); 567 if (f->deleted) { 568 spin_unlock(&tp->lock); 569 return -ENOENT; 570 } 571 572 f->deleted = true; 573 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 574 f->mask->filter_ht_params); 575 idr_remove(&head->handle_idr, f->handle); 576 list_del_rcu(&f->list); 577 spin_unlock(&tp->lock); 578 579 *last = fl_mask_put(head, f->mask); 580 if (!tc_skip_hw(f->flags)) 581 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 582 tcf_unbind_filter(tp, &f->res); 583 __fl_put(f); 584 585 return 0; 586 } 587 588 static void fl_destroy_sleepable(struct work_struct *work) 589 { 590 struct cls_fl_head *head = container_of(to_rcu_work(work), 591 struct cls_fl_head, 592 rwork); 593 594 rhashtable_destroy(&head->ht); 595 kfree(head); 596 module_put(THIS_MODULE); 597 } 598 599 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 600 struct netlink_ext_ack *extack) 601 { 602 struct cls_fl_head *head = fl_head_dereference(tp); 603 struct fl_flow_mask *mask, *next_mask; 604 struct cls_fl_filter *f, *next; 605 bool last; 606 607 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 608 list_for_each_entry_safe(f, next, &mask->filters, list) { 609 __fl_delete(tp, f, &last, rtnl_held, extack); 610 if (last) 611 break; 612 } 613 } 614 idr_destroy(&head->handle_idr); 615 616 __module_get(THIS_MODULE); 617 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 618 } 619 620 static void fl_put(struct tcf_proto *tp, void *arg) 621 { 622 struct cls_fl_filter *f = arg; 623 624 __fl_put(f); 625 } 626 627 static void *fl_get(struct tcf_proto *tp, u32 handle) 628 { 629 struct cls_fl_head *head = fl_head_dereference(tp); 630 631 return __fl_get(head, handle); 632 } 633 634 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 635 [TCA_FLOWER_UNSPEC] = { .strict_start_type = 636 TCA_FLOWER_L2_MISS }, 637 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 638 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 639 .len = IFNAMSIZ }, 640 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 641 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 642 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 643 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 644 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 646 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 647 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 648 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 649 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 650 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 651 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 652 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 653 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 654 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 655 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 656 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 657 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 658 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 659 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 660 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 661 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 662 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 663 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 664 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 665 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 666 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 667 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 668 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 669 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 670 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 671 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 672 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 673 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 674 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 675 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 676 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 677 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 678 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 679 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 680 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 681 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 682 [TCA_FLOWER_KEY_FLAGS] = NLA_POLICY_MASK(NLA_BE32, 683 TCA_FLOWER_KEY_FLAGS_POLICY_MASK), 684 [TCA_FLOWER_KEY_FLAGS_MASK] = NLA_POLICY_MASK(NLA_BE32, 685 TCA_FLOWER_KEY_FLAGS_POLICY_MASK), 686 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 687 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 688 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 689 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 690 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 692 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 694 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 695 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 696 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 697 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 698 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 699 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 700 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 701 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 702 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 703 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 704 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 705 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 706 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 707 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 708 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 709 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 710 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 711 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 712 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 713 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 714 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 715 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 716 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 717 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 718 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 719 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 720 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 721 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 722 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 723 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 724 [TCA_FLOWER_KEY_CT_STATE] = 725 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 726 [TCA_FLOWER_KEY_CT_STATE_MASK] = 727 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 728 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 729 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 730 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 731 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 732 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 733 .len = 128 / BITS_PER_BYTE }, 734 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 735 .len = 128 / BITS_PER_BYTE }, 736 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 737 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 738 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 739 [TCA_FLOWER_KEY_NUM_OF_VLANS] = { .type = NLA_U8 }, 740 [TCA_FLOWER_KEY_PPPOE_SID] = { .type = NLA_U16 }, 741 [TCA_FLOWER_KEY_PPP_PROTO] = { .type = NLA_U16 }, 742 [TCA_FLOWER_KEY_L2TPV3_SID] = { .type = NLA_U32 }, 743 [TCA_FLOWER_KEY_SPI] = { .type = NLA_U32 }, 744 [TCA_FLOWER_KEY_SPI_MASK] = { .type = NLA_U32 }, 745 [TCA_FLOWER_L2_MISS] = NLA_POLICY_MAX(NLA_U8, 1), 746 [TCA_FLOWER_KEY_CFM] = { .type = NLA_NESTED }, 747 [TCA_FLOWER_KEY_ENC_FLAGS] = NLA_POLICY_MASK(NLA_BE32, 748 TCA_FLOWER_KEY_ENC_FLAGS_POLICY_MASK), 749 [TCA_FLOWER_KEY_ENC_FLAGS_MASK] = NLA_POLICY_MASK(NLA_BE32, 750 TCA_FLOWER_KEY_ENC_FLAGS_POLICY_MASK), 751 }; 752 753 static const struct nla_policy 754 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 755 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 756 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 757 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 758 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 759 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 760 [TCA_FLOWER_KEY_ENC_OPTS_GTP] = { .type = NLA_NESTED }, 761 [TCA_FLOWER_KEY_ENC_OPTS_PFCP] = { .type = NLA_NESTED }, 762 }; 763 764 static const struct nla_policy 765 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 766 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 767 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 768 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 769 .len = 128 }, 770 }; 771 772 static const struct nla_policy 773 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 774 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 775 }; 776 777 static const struct nla_policy 778 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 779 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 780 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 781 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 782 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 783 }; 784 785 static const struct nla_policy 786 gtp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1] = { 787 [TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] = { .type = NLA_U8 }, 788 [TCA_FLOWER_KEY_ENC_OPT_GTP_QFI] = { .type = NLA_U8 }, 789 }; 790 791 static const struct nla_policy 792 pfcp_opt_policy[TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX + 1] = { 793 [TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE] = { .type = NLA_U8 }, 794 [TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID] = { .type = NLA_U64 }, 795 }; 796 797 static const struct nla_policy 798 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 799 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 800 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 801 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 802 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 803 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 804 }; 805 806 static const struct nla_policy 807 cfm_opt_policy[TCA_FLOWER_KEY_CFM_OPT_MAX + 1] = { 808 [TCA_FLOWER_KEY_CFM_MD_LEVEL] = NLA_POLICY_MAX(NLA_U8, 809 FLOW_DIS_CFM_MDL_MAX), 810 [TCA_FLOWER_KEY_CFM_OPCODE] = { .type = NLA_U8 }, 811 }; 812 813 static void fl_set_key_val(struct nlattr **tb, 814 void *val, int val_type, 815 void *mask, int mask_type, int len) 816 { 817 if (!tb[val_type]) 818 return; 819 nla_memcpy(val, tb[val_type], len); 820 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 821 memset(mask, 0xff, len); 822 else 823 nla_memcpy(mask, tb[mask_type], len); 824 } 825 826 static int fl_set_key_spi(struct nlattr **tb, struct fl_flow_key *key, 827 struct fl_flow_key *mask, 828 struct netlink_ext_ack *extack) 829 { 830 if (key->basic.ip_proto != IPPROTO_ESP && 831 key->basic.ip_proto != IPPROTO_AH) { 832 NL_SET_ERR_MSG(extack, 833 "Protocol must be either ESP or AH"); 834 return -EINVAL; 835 } 836 837 fl_set_key_val(tb, &key->ipsec.spi, 838 TCA_FLOWER_KEY_SPI, 839 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 840 sizeof(key->ipsec.spi)); 841 return 0; 842 } 843 844 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 845 struct fl_flow_key *mask, 846 struct netlink_ext_ack *extack) 847 { 848 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 849 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 850 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 851 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 852 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 853 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 854 fl_set_key_val(tb, &key->tp_range.tp_min.src, 855 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 856 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 857 fl_set_key_val(tb, &key->tp_range.tp_max.src, 858 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 859 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 860 861 if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) { 862 NL_SET_ERR_MSG(extack, 863 "Both min and max destination ports must be specified"); 864 return -EINVAL; 865 } 866 if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) { 867 NL_SET_ERR_MSG(extack, 868 "Both min and max source ports must be specified"); 869 return -EINVAL; 870 } 871 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 872 ntohs(key->tp_range.tp_max.dst) <= 873 ntohs(key->tp_range.tp_min.dst)) { 874 NL_SET_ERR_MSG_ATTR(extack, 875 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 876 "Invalid destination port range (min must be strictly smaller than max)"); 877 return -EINVAL; 878 } 879 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 880 ntohs(key->tp_range.tp_max.src) <= 881 ntohs(key->tp_range.tp_min.src)) { 882 NL_SET_ERR_MSG_ATTR(extack, 883 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 884 "Invalid source port range (min must be strictly smaller than max)"); 885 return -EINVAL; 886 } 887 888 return 0; 889 } 890 891 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 892 struct flow_dissector_key_mpls *key_val, 893 struct flow_dissector_key_mpls *key_mask, 894 struct netlink_ext_ack *extack) 895 { 896 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 897 struct flow_dissector_mpls_lse *lse_mask; 898 struct flow_dissector_mpls_lse *lse_val; 899 u8 lse_index; 900 u8 depth; 901 int err; 902 903 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 904 mpls_stack_entry_policy, extack); 905 if (err < 0) 906 return err; 907 908 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 909 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 910 return -EINVAL; 911 } 912 913 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 914 915 /* LSE depth starts at 1, for consistency with terminology used by 916 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 917 */ 918 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 919 NL_SET_ERR_MSG_ATTR(extack, 920 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 921 "Invalid MPLS depth"); 922 return -EINVAL; 923 } 924 lse_index = depth - 1; 925 926 dissector_set_mpls_lse(key_val, lse_index); 927 dissector_set_mpls_lse(key_mask, lse_index); 928 929 lse_val = &key_val->ls[lse_index]; 930 lse_mask = &key_mask->ls[lse_index]; 931 932 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 933 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 934 lse_mask->mpls_ttl = MPLS_TTL_MASK; 935 } 936 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 937 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 938 939 if (bos & ~MPLS_BOS_MASK) { 940 NL_SET_ERR_MSG_ATTR(extack, 941 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 942 "Bottom Of Stack (BOS) must be 0 or 1"); 943 return -EINVAL; 944 } 945 lse_val->mpls_bos = bos; 946 lse_mask->mpls_bos = MPLS_BOS_MASK; 947 } 948 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 949 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 950 951 if (tc & ~MPLS_TC_MASK) { 952 NL_SET_ERR_MSG_ATTR(extack, 953 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 954 "Traffic Class (TC) must be between 0 and 7"); 955 return -EINVAL; 956 } 957 lse_val->mpls_tc = tc; 958 lse_mask->mpls_tc = MPLS_TC_MASK; 959 } 960 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 961 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 962 963 if (label & ~MPLS_LABEL_MASK) { 964 NL_SET_ERR_MSG_ATTR(extack, 965 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 966 "Label must be between 0 and 1048575"); 967 return -EINVAL; 968 } 969 lse_val->mpls_label = label; 970 lse_mask->mpls_label = MPLS_LABEL_MASK; 971 } 972 973 return 0; 974 } 975 976 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 977 struct flow_dissector_key_mpls *key_val, 978 struct flow_dissector_key_mpls *key_mask, 979 struct netlink_ext_ack *extack) 980 { 981 struct nlattr *nla_lse; 982 int rem; 983 int err; 984 985 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 986 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 987 "NLA_F_NESTED is missing"); 988 return -EINVAL; 989 } 990 991 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 992 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 993 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 994 "Invalid MPLS option type"); 995 return -EINVAL; 996 } 997 998 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 999 if (err < 0) 1000 return err; 1001 } 1002 if (rem) { 1003 NL_SET_ERR_MSG(extack, 1004 "Bytes leftover after parsing MPLS options"); 1005 return -EINVAL; 1006 } 1007 1008 return 0; 1009 } 1010 1011 static int fl_set_key_mpls(struct nlattr **tb, 1012 struct flow_dissector_key_mpls *key_val, 1013 struct flow_dissector_key_mpls *key_mask, 1014 struct netlink_ext_ack *extack) 1015 { 1016 struct flow_dissector_mpls_lse *lse_mask; 1017 struct flow_dissector_mpls_lse *lse_val; 1018 1019 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 1020 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 1021 tb[TCA_FLOWER_KEY_MPLS_BOS] || 1022 tb[TCA_FLOWER_KEY_MPLS_TC] || 1023 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1024 NL_SET_ERR_MSG_ATTR(extack, 1025 tb[TCA_FLOWER_KEY_MPLS_OPTS], 1026 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 1027 return -EBADMSG; 1028 } 1029 1030 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 1031 key_val, key_mask, extack); 1032 } 1033 1034 lse_val = &key_val->ls[0]; 1035 lse_mask = &key_mask->ls[0]; 1036 1037 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 1038 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 1039 lse_mask->mpls_ttl = MPLS_TTL_MASK; 1040 dissector_set_mpls_lse(key_val, 0); 1041 dissector_set_mpls_lse(key_mask, 0); 1042 } 1043 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 1044 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 1045 1046 if (bos & ~MPLS_BOS_MASK) { 1047 NL_SET_ERR_MSG_ATTR(extack, 1048 tb[TCA_FLOWER_KEY_MPLS_BOS], 1049 "Bottom Of Stack (BOS) must be 0 or 1"); 1050 return -EINVAL; 1051 } 1052 lse_val->mpls_bos = bos; 1053 lse_mask->mpls_bos = MPLS_BOS_MASK; 1054 dissector_set_mpls_lse(key_val, 0); 1055 dissector_set_mpls_lse(key_mask, 0); 1056 } 1057 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 1058 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 1059 1060 if (tc & ~MPLS_TC_MASK) { 1061 NL_SET_ERR_MSG_ATTR(extack, 1062 tb[TCA_FLOWER_KEY_MPLS_TC], 1063 "Traffic Class (TC) must be between 0 and 7"); 1064 return -EINVAL; 1065 } 1066 lse_val->mpls_tc = tc; 1067 lse_mask->mpls_tc = MPLS_TC_MASK; 1068 dissector_set_mpls_lse(key_val, 0); 1069 dissector_set_mpls_lse(key_mask, 0); 1070 } 1071 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 1072 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 1073 1074 if (label & ~MPLS_LABEL_MASK) { 1075 NL_SET_ERR_MSG_ATTR(extack, 1076 tb[TCA_FLOWER_KEY_MPLS_LABEL], 1077 "Label must be between 0 and 1048575"); 1078 return -EINVAL; 1079 } 1080 lse_val->mpls_label = label; 1081 lse_mask->mpls_label = MPLS_LABEL_MASK; 1082 dissector_set_mpls_lse(key_val, 0); 1083 dissector_set_mpls_lse(key_mask, 0); 1084 } 1085 return 0; 1086 } 1087 1088 static void fl_set_key_vlan(struct nlattr **tb, 1089 __be16 ethertype, 1090 int vlan_id_key, int vlan_prio_key, 1091 int vlan_next_eth_type_key, 1092 struct flow_dissector_key_vlan *key_val, 1093 struct flow_dissector_key_vlan *key_mask) 1094 { 1095 #define VLAN_PRIORITY_MASK 0x7 1096 1097 if (tb[vlan_id_key]) { 1098 key_val->vlan_id = 1099 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1100 key_mask->vlan_id = VLAN_VID_MASK; 1101 } 1102 if (tb[vlan_prio_key]) { 1103 key_val->vlan_priority = 1104 nla_get_u8(tb[vlan_prio_key]) & 1105 VLAN_PRIORITY_MASK; 1106 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1107 } 1108 if (ethertype) { 1109 key_val->vlan_tpid = ethertype; 1110 key_mask->vlan_tpid = cpu_to_be16(~0); 1111 } 1112 if (tb[vlan_next_eth_type_key]) { 1113 key_val->vlan_eth_type = 1114 nla_get_be16(tb[vlan_next_eth_type_key]); 1115 key_mask->vlan_eth_type = cpu_to_be16(~0); 1116 } 1117 } 1118 1119 static void fl_set_key_pppoe(struct nlattr **tb, 1120 struct flow_dissector_key_pppoe *key_val, 1121 struct flow_dissector_key_pppoe *key_mask, 1122 struct fl_flow_key *key, 1123 struct fl_flow_key *mask) 1124 { 1125 /* key_val::type must be set to ETH_P_PPP_SES 1126 * because ETH_P_PPP_SES was stored in basic.n_proto 1127 * which might get overwritten by ppp_proto 1128 * or might be set to 0, the role of key_val::type 1129 * is similar to vlan_key::tpid 1130 */ 1131 key_val->type = htons(ETH_P_PPP_SES); 1132 key_mask->type = cpu_to_be16(~0); 1133 1134 if (tb[TCA_FLOWER_KEY_PPPOE_SID]) { 1135 key_val->session_id = 1136 nla_get_be16(tb[TCA_FLOWER_KEY_PPPOE_SID]); 1137 key_mask->session_id = cpu_to_be16(~0); 1138 } 1139 if (tb[TCA_FLOWER_KEY_PPP_PROTO]) { 1140 key_val->ppp_proto = 1141 nla_get_be16(tb[TCA_FLOWER_KEY_PPP_PROTO]); 1142 key_mask->ppp_proto = cpu_to_be16(~0); 1143 1144 if (key_val->ppp_proto == htons(PPP_IP)) { 1145 key->basic.n_proto = htons(ETH_P_IP); 1146 mask->basic.n_proto = cpu_to_be16(~0); 1147 } else if (key_val->ppp_proto == htons(PPP_IPV6)) { 1148 key->basic.n_proto = htons(ETH_P_IPV6); 1149 mask->basic.n_proto = cpu_to_be16(~0); 1150 } else if (key_val->ppp_proto == htons(PPP_MPLS_UC)) { 1151 key->basic.n_proto = htons(ETH_P_MPLS_UC); 1152 mask->basic.n_proto = cpu_to_be16(~0); 1153 } else if (key_val->ppp_proto == htons(PPP_MPLS_MC)) { 1154 key->basic.n_proto = htons(ETH_P_MPLS_MC); 1155 mask->basic.n_proto = cpu_to_be16(~0); 1156 } 1157 } else { 1158 key->basic.n_proto = 0; 1159 mask->basic.n_proto = cpu_to_be16(0); 1160 } 1161 } 1162 1163 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1164 u32 *dissector_key, u32 *dissector_mask, 1165 u32 flower_flag_bit, u32 dissector_flag_bit) 1166 { 1167 if (flower_mask & flower_flag_bit) { 1168 *dissector_mask |= dissector_flag_bit; 1169 if (flower_key & flower_flag_bit) 1170 *dissector_key |= dissector_flag_bit; 1171 } 1172 } 1173 1174 static int fl_set_key_flags(struct nlattr *tca_opts, struct nlattr **tb, 1175 bool encap, u32 *flags_key, u32 *flags_mask, 1176 struct netlink_ext_ack *extack) 1177 { 1178 int fl_key, fl_mask; 1179 u32 key, mask; 1180 1181 if (encap) { 1182 fl_key = TCA_FLOWER_KEY_ENC_FLAGS; 1183 fl_mask = TCA_FLOWER_KEY_ENC_FLAGS_MASK; 1184 } else { 1185 fl_key = TCA_FLOWER_KEY_FLAGS; 1186 fl_mask = TCA_FLOWER_KEY_FLAGS_MASK; 1187 } 1188 1189 /* mask is mandatory for flags */ 1190 if (NL_REQ_ATTR_CHECK(extack, tca_opts, tb, fl_mask)) { 1191 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1192 return -EINVAL; 1193 } 1194 1195 key = be32_to_cpu(nla_get_be32(tb[fl_key])); 1196 mask = be32_to_cpu(nla_get_be32(tb[fl_mask])); 1197 1198 *flags_key = 0; 1199 *flags_mask = 0; 1200 1201 fl_set_key_flag(key, mask, flags_key, flags_mask, 1202 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1203 fl_set_key_flag(key, mask, flags_key, flags_mask, 1204 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1205 FLOW_DIS_FIRST_FRAG); 1206 1207 fl_set_key_flag(key, mask, flags_key, flags_mask, 1208 TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM, 1209 FLOW_DIS_F_TUNNEL_CSUM); 1210 1211 fl_set_key_flag(key, mask, flags_key, flags_mask, 1212 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT, 1213 FLOW_DIS_F_TUNNEL_DONT_FRAGMENT); 1214 1215 fl_set_key_flag(key, mask, flags_key, flags_mask, 1216 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM, FLOW_DIS_F_TUNNEL_OAM); 1217 1218 fl_set_key_flag(key, mask, flags_key, flags_mask, 1219 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT, 1220 FLOW_DIS_F_TUNNEL_CRIT_OPT); 1221 1222 return 0; 1223 } 1224 1225 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1226 struct flow_dissector_key_ip *key, 1227 struct flow_dissector_key_ip *mask) 1228 { 1229 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1230 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1231 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1232 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1233 1234 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1235 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1236 } 1237 1238 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1239 int depth, int option_len, 1240 struct netlink_ext_ack *extack) 1241 { 1242 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1243 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1244 struct geneve_opt *opt; 1245 int err, data_len = 0; 1246 1247 if (option_len > sizeof(struct geneve_opt)) 1248 data_len = option_len - sizeof(struct geneve_opt); 1249 1250 if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) 1251 return -ERANGE; 1252 1253 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1254 memset(opt, 0xff, option_len); 1255 opt->length = data_len / 4; 1256 opt->r1 = 0; 1257 opt->r2 = 0; 1258 opt->r3 = 0; 1259 1260 /* If no mask has been prodived we assume an exact match. */ 1261 if (!depth) 1262 return sizeof(struct geneve_opt) + data_len; 1263 1264 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1265 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1266 return -EINVAL; 1267 } 1268 1269 err = nla_parse_nested_deprecated(tb, 1270 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1271 nla, geneve_opt_policy, extack); 1272 if (err < 0) 1273 return err; 1274 1275 /* We are not allowed to omit any of CLASS, TYPE or DATA 1276 * fields from the key. 1277 */ 1278 if (!option_len && 1279 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1280 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1281 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1282 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1283 return -EINVAL; 1284 } 1285 1286 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1287 * for the mask. 1288 */ 1289 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1290 int new_len = key->enc_opts.len; 1291 1292 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1293 data_len = nla_len(data); 1294 if (data_len < 4) { 1295 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1296 return -ERANGE; 1297 } 1298 if (data_len % 4) { 1299 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1300 return -ERANGE; 1301 } 1302 1303 new_len += sizeof(struct geneve_opt) + data_len; 1304 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1305 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1306 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1307 return -ERANGE; 1308 } 1309 opt->length = data_len / 4; 1310 memcpy(opt->opt_data, nla_data(data), data_len); 1311 } 1312 1313 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1314 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1315 opt->opt_class = nla_get_be16(class); 1316 } 1317 1318 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1319 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1320 opt->type = nla_get_u8(type); 1321 } 1322 1323 return sizeof(struct geneve_opt) + data_len; 1324 } 1325 1326 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1327 int depth, int option_len, 1328 struct netlink_ext_ack *extack) 1329 { 1330 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1331 struct vxlan_metadata *md; 1332 int err; 1333 1334 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1335 memset(md, 0xff, sizeof(*md)); 1336 1337 if (!depth) 1338 return sizeof(*md); 1339 1340 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1341 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1342 return -EINVAL; 1343 } 1344 1345 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1346 vxlan_opt_policy, extack); 1347 if (err < 0) 1348 return err; 1349 1350 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1351 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1352 return -EINVAL; 1353 } 1354 1355 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1356 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1357 md->gbp &= VXLAN_GBP_MASK; 1358 } 1359 1360 return sizeof(*md); 1361 } 1362 1363 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1364 int depth, int option_len, 1365 struct netlink_ext_ack *extack) 1366 { 1367 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1368 struct erspan_metadata *md; 1369 int err; 1370 1371 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1372 md->version = 1; 1373 1374 if (!depth) 1375 return sizeof(*md); 1376 1377 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1378 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1379 return -EINVAL; 1380 } 1381 1382 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1383 erspan_opt_policy, extack); 1384 if (err < 0) 1385 return err; 1386 1387 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1388 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1389 return -EINVAL; 1390 } 1391 1392 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1393 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1394 1395 if (md->version == 1) { 1396 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1397 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1398 return -EINVAL; 1399 } 1400 memset(&md->u.index, 0xff, sizeof(md->u.index)); 1401 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1402 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1403 md->u.index = nla_get_be32(nla); 1404 } 1405 } else if (md->version == 2) { 1406 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1407 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1408 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1409 return -EINVAL; 1410 } 1411 md->u.md2.dir = 1; 1412 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1413 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1414 md->u.md2.dir = nla_get_u8(nla); 1415 } 1416 set_hwid(&md->u.md2, 0xff); 1417 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1418 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1419 set_hwid(&md->u.md2, nla_get_u8(nla)); 1420 } 1421 } else { 1422 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1423 return -EINVAL; 1424 } 1425 1426 return sizeof(*md); 1427 } 1428 1429 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1430 int depth, int option_len, 1431 struct netlink_ext_ack *extack) 1432 { 1433 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1434 struct gtp_pdu_session_info *sinfo; 1435 u8 len = key->enc_opts.len; 1436 int err; 1437 1438 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1439 memset(sinfo, 0xff, option_len); 1440 1441 if (!depth) 1442 return sizeof(*sinfo); 1443 1444 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1445 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1446 return -EINVAL; 1447 } 1448 1449 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1450 gtp_opt_policy, extack); 1451 if (err < 0) 1452 return err; 1453 1454 if (!option_len && 1455 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1456 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1457 NL_SET_ERR_MSG_MOD(extack, 1458 "Missing tunnel key gtp option pdu type or qfi"); 1459 return -EINVAL; 1460 } 1461 1462 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1463 sinfo->pdu_type = 1464 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1465 1466 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1467 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1468 1469 return sizeof(*sinfo); 1470 } 1471 1472 static int fl_set_pfcp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1473 int depth, int option_len, 1474 struct netlink_ext_ack *extack) 1475 { 1476 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX + 1]; 1477 struct pfcp_metadata *md; 1478 int err; 1479 1480 md = (struct pfcp_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1481 memset(md, 0xff, sizeof(*md)); 1482 1483 if (!depth) 1484 return sizeof(*md); 1485 1486 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_PFCP) { 1487 NL_SET_ERR_MSG_MOD(extack, "Non-pfcp option type for mask"); 1488 return -EINVAL; 1489 } 1490 1491 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX, nla, 1492 pfcp_opt_policy, extack); 1493 if (err < 0) 1494 return err; 1495 1496 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]) { 1497 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel key pfcp option type"); 1498 return -EINVAL; 1499 } 1500 1501 if (tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]) 1502 md->type = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]); 1503 1504 if (tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]) 1505 md->seid = nla_get_be64(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]); 1506 1507 return sizeof(*md); 1508 } 1509 1510 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1511 struct fl_flow_key *mask, 1512 struct netlink_ext_ack *extack) 1513 { 1514 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1515 int err, option_len, key_depth, msk_depth = 0; 1516 1517 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1518 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1519 enc_opts_policy, extack); 1520 if (err) 1521 return err; 1522 1523 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1524 1525 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1526 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1527 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1528 enc_opts_policy, extack); 1529 if (err) 1530 return err; 1531 1532 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1533 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1534 if (!nla_ok(nla_opt_msk, msk_depth)) { 1535 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1536 return -EINVAL; 1537 } 1538 } 1539 1540 nla_for_each_attr(nla_opt_key, nla_enc_key, 1541 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1542 switch (nla_type(nla_opt_key)) { 1543 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1544 if (key->enc_opts.dst_opt_type && 1545 key->enc_opts.dst_opt_type != 1546 IP_TUNNEL_GENEVE_OPT_BIT) { 1547 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1548 return -EINVAL; 1549 } 1550 option_len = 0; 1551 key->enc_opts.dst_opt_type = IP_TUNNEL_GENEVE_OPT_BIT; 1552 option_len = fl_set_geneve_opt(nla_opt_key, key, 1553 key_depth, option_len, 1554 extack); 1555 if (option_len < 0) 1556 return option_len; 1557 1558 key->enc_opts.len += option_len; 1559 /* At the same time we need to parse through the mask 1560 * in order to verify exact and mask attribute lengths. 1561 */ 1562 mask->enc_opts.dst_opt_type = IP_TUNNEL_GENEVE_OPT_BIT; 1563 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1564 msk_depth, option_len, 1565 extack); 1566 if (option_len < 0) 1567 return option_len; 1568 1569 mask->enc_opts.len += option_len; 1570 if (key->enc_opts.len != mask->enc_opts.len) { 1571 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1572 return -EINVAL; 1573 } 1574 break; 1575 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1576 if (key->enc_opts.dst_opt_type) { 1577 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1578 return -EINVAL; 1579 } 1580 option_len = 0; 1581 key->enc_opts.dst_opt_type = IP_TUNNEL_VXLAN_OPT_BIT; 1582 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1583 key_depth, option_len, 1584 extack); 1585 if (option_len < 0) 1586 return option_len; 1587 1588 key->enc_opts.len += option_len; 1589 /* At the same time we need to parse through the mask 1590 * in order to verify exact and mask attribute lengths. 1591 */ 1592 mask->enc_opts.dst_opt_type = IP_TUNNEL_VXLAN_OPT_BIT; 1593 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1594 msk_depth, option_len, 1595 extack); 1596 if (option_len < 0) 1597 return option_len; 1598 1599 mask->enc_opts.len += option_len; 1600 if (key->enc_opts.len != mask->enc_opts.len) { 1601 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1602 return -EINVAL; 1603 } 1604 break; 1605 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1606 if (key->enc_opts.dst_opt_type) { 1607 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1608 return -EINVAL; 1609 } 1610 option_len = 0; 1611 key->enc_opts.dst_opt_type = IP_TUNNEL_ERSPAN_OPT_BIT; 1612 option_len = fl_set_erspan_opt(nla_opt_key, key, 1613 key_depth, option_len, 1614 extack); 1615 if (option_len < 0) 1616 return option_len; 1617 1618 key->enc_opts.len += option_len; 1619 /* At the same time we need to parse through the mask 1620 * in order to verify exact and mask attribute lengths. 1621 */ 1622 mask->enc_opts.dst_opt_type = IP_TUNNEL_ERSPAN_OPT_BIT; 1623 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1624 msk_depth, option_len, 1625 extack); 1626 if (option_len < 0) 1627 return option_len; 1628 1629 mask->enc_opts.len += option_len; 1630 if (key->enc_opts.len != mask->enc_opts.len) { 1631 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1632 return -EINVAL; 1633 } 1634 break; 1635 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1636 if (key->enc_opts.dst_opt_type) { 1637 NL_SET_ERR_MSG_MOD(extack, 1638 "Duplicate type for gtp options"); 1639 return -EINVAL; 1640 } 1641 option_len = 0; 1642 key->enc_opts.dst_opt_type = IP_TUNNEL_GTP_OPT_BIT; 1643 option_len = fl_set_gtp_opt(nla_opt_key, key, 1644 key_depth, option_len, 1645 extack); 1646 if (option_len < 0) 1647 return option_len; 1648 1649 key->enc_opts.len += option_len; 1650 /* At the same time we need to parse through the mask 1651 * in order to verify exact and mask attribute lengths. 1652 */ 1653 mask->enc_opts.dst_opt_type = IP_TUNNEL_GTP_OPT_BIT; 1654 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1655 msk_depth, option_len, 1656 extack); 1657 if (option_len < 0) 1658 return option_len; 1659 1660 mask->enc_opts.len += option_len; 1661 if (key->enc_opts.len != mask->enc_opts.len) { 1662 NL_SET_ERR_MSG_MOD(extack, 1663 "Key and mask miss aligned"); 1664 return -EINVAL; 1665 } 1666 break; 1667 case TCA_FLOWER_KEY_ENC_OPTS_PFCP: 1668 if (key->enc_opts.dst_opt_type) { 1669 NL_SET_ERR_MSG_MOD(extack, "Duplicate type for pfcp options"); 1670 return -EINVAL; 1671 } 1672 option_len = 0; 1673 key->enc_opts.dst_opt_type = IP_TUNNEL_PFCP_OPT_BIT; 1674 option_len = fl_set_pfcp_opt(nla_opt_key, key, 1675 key_depth, option_len, 1676 extack); 1677 if (option_len < 0) 1678 return option_len; 1679 1680 key->enc_opts.len += option_len; 1681 /* At the same time we need to parse through the mask 1682 * in order to verify exact and mask attribute lengths. 1683 */ 1684 mask->enc_opts.dst_opt_type = IP_TUNNEL_PFCP_OPT_BIT; 1685 option_len = fl_set_pfcp_opt(nla_opt_msk, mask, 1686 msk_depth, option_len, 1687 extack); 1688 if (option_len < 0) 1689 return option_len; 1690 1691 mask->enc_opts.len += option_len; 1692 if (key->enc_opts.len != mask->enc_opts.len) { 1693 NL_SET_ERR_MSG_MOD(extack, "Key and mask miss aligned"); 1694 return -EINVAL; 1695 } 1696 break; 1697 default: 1698 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1699 return -EINVAL; 1700 } 1701 1702 if (!msk_depth) 1703 continue; 1704 1705 if (!nla_ok(nla_opt_msk, msk_depth)) { 1706 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1707 return -EINVAL; 1708 } 1709 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1710 } 1711 1712 return 0; 1713 } 1714 1715 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1716 struct netlink_ext_ack *extack) 1717 { 1718 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1719 NL_SET_ERR_MSG_ATTR(extack, tb, 1720 "no trk, so no other flag can be set"); 1721 return -EINVAL; 1722 } 1723 1724 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1725 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1726 NL_SET_ERR_MSG_ATTR(extack, tb, 1727 "new and est are mutually exclusive"); 1728 return -EINVAL; 1729 } 1730 1731 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1732 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1733 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1734 NL_SET_ERR_MSG_ATTR(extack, tb, 1735 "when inv is set, only trk may be set"); 1736 return -EINVAL; 1737 } 1738 1739 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1740 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1741 NL_SET_ERR_MSG_ATTR(extack, tb, 1742 "new and rpl are mutually exclusive"); 1743 return -EINVAL; 1744 } 1745 1746 return 0; 1747 } 1748 1749 static int fl_set_key_ct(struct nlattr **tb, 1750 struct flow_dissector_key_ct *key, 1751 struct flow_dissector_key_ct *mask, 1752 struct netlink_ext_ack *extack) 1753 { 1754 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1755 int err; 1756 1757 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1758 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1759 return -EOPNOTSUPP; 1760 } 1761 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1762 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1763 sizeof(key->ct_state)); 1764 1765 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1766 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1767 extack); 1768 if (err) 1769 return err; 1770 1771 } 1772 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1773 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1774 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1775 return -EOPNOTSUPP; 1776 } 1777 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1778 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1779 sizeof(key->ct_zone)); 1780 } 1781 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1782 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1783 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1784 return -EOPNOTSUPP; 1785 } 1786 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1787 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1788 sizeof(key->ct_mark)); 1789 } 1790 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1791 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1792 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1793 return -EOPNOTSUPP; 1794 } 1795 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1796 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1797 sizeof(key->ct_labels)); 1798 } 1799 1800 return 0; 1801 } 1802 1803 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1804 struct fl_flow_key *key, struct fl_flow_key *mask, 1805 int vthresh) 1806 { 1807 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1808 1809 if (!tb) { 1810 *ethertype = 0; 1811 return good_num_of_vlans; 1812 } 1813 1814 *ethertype = nla_get_be16(tb); 1815 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1816 return true; 1817 1818 key->basic.n_proto = *ethertype; 1819 mask->basic.n_proto = cpu_to_be16(~0); 1820 return false; 1821 } 1822 1823 static void fl_set_key_cfm_md_level(struct nlattr **tb, 1824 struct fl_flow_key *key, 1825 struct fl_flow_key *mask, 1826 struct netlink_ext_ack *extack) 1827 { 1828 u8 level; 1829 1830 if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) 1831 return; 1832 1833 level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); 1834 key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); 1835 mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; 1836 } 1837 1838 static void fl_set_key_cfm_opcode(struct nlattr **tb, 1839 struct fl_flow_key *key, 1840 struct fl_flow_key *mask, 1841 struct netlink_ext_ack *extack) 1842 { 1843 fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, 1844 &mask->cfm.opcode, TCA_FLOWER_UNSPEC, 1845 sizeof(key->cfm.opcode)); 1846 } 1847 1848 static int fl_set_key_cfm(struct nlattr **tb, 1849 struct fl_flow_key *key, 1850 struct fl_flow_key *mask, 1851 struct netlink_ext_ack *extack) 1852 { 1853 struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1]; 1854 int err; 1855 1856 if (!tb[TCA_FLOWER_KEY_CFM]) 1857 return 0; 1858 1859 err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, 1860 tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); 1861 if (err < 0) 1862 return err; 1863 1864 fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); 1865 fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 1866 1867 return 0; 1868 } 1869 1870 static int fl_set_key(struct net *net, struct nlattr *tca_opts, 1871 struct nlattr **tb, struct fl_flow_key *key, 1872 struct fl_flow_key *mask, struct netlink_ext_ack *extack) 1873 { 1874 __be16 ethertype; 1875 int ret = 0; 1876 1877 if (tb[TCA_FLOWER_INDEV]) { 1878 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1879 if (err < 0) 1880 return err; 1881 key->meta.ingress_ifindex = err; 1882 mask->meta.ingress_ifindex = 0xffffffff; 1883 } 1884 1885 fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, 1886 &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, 1887 sizeof(key->meta.l2_miss)); 1888 1889 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1890 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1891 sizeof(key->eth.dst)); 1892 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1893 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1894 sizeof(key->eth.src)); 1895 fl_set_key_val(tb, &key->num_of_vlans, 1896 TCA_FLOWER_KEY_NUM_OF_VLANS, 1897 &mask->num_of_vlans, 1898 TCA_FLOWER_UNSPEC, 1899 sizeof(key->num_of_vlans)); 1900 1901 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1902 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1903 TCA_FLOWER_KEY_VLAN_PRIO, 1904 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1905 &key->vlan, &mask->vlan); 1906 1907 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1908 ðertype, key, mask, 1)) { 1909 fl_set_key_vlan(tb, ethertype, 1910 TCA_FLOWER_KEY_CVLAN_ID, 1911 TCA_FLOWER_KEY_CVLAN_PRIO, 1912 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1913 &key->cvlan, &mask->cvlan); 1914 fl_set_key_val(tb, &key->basic.n_proto, 1915 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1916 &mask->basic.n_proto, 1917 TCA_FLOWER_UNSPEC, 1918 sizeof(key->basic.n_proto)); 1919 } 1920 } 1921 1922 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1923 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1924 1925 if (key->basic.n_proto == htons(ETH_P_IP) || 1926 key->basic.n_proto == htons(ETH_P_IPV6)) { 1927 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1928 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1929 sizeof(key->basic.ip_proto)); 1930 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1931 } 1932 1933 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1934 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1935 mask->control.addr_type = ~0; 1936 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1937 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1938 sizeof(key->ipv4.src)); 1939 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1940 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1941 sizeof(key->ipv4.dst)); 1942 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1943 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1944 mask->control.addr_type = ~0; 1945 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1946 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1947 sizeof(key->ipv6.src)); 1948 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1949 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1950 sizeof(key->ipv6.dst)); 1951 } 1952 1953 if (key->basic.ip_proto == IPPROTO_TCP) { 1954 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1955 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1956 sizeof(key->tp.src)); 1957 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1958 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1959 sizeof(key->tp.dst)); 1960 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1961 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1962 sizeof(key->tcp.flags)); 1963 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1964 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1965 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1966 sizeof(key->tp.src)); 1967 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1968 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1969 sizeof(key->tp.dst)); 1970 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1971 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1972 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1973 sizeof(key->tp.src)); 1974 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1975 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1976 sizeof(key->tp.dst)); 1977 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1978 key->basic.ip_proto == IPPROTO_ICMP) { 1979 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1980 &mask->icmp.type, 1981 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1982 sizeof(key->icmp.type)); 1983 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1984 &mask->icmp.code, 1985 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1986 sizeof(key->icmp.code)); 1987 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1988 key->basic.ip_proto == IPPROTO_ICMPV6) { 1989 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1990 &mask->icmp.type, 1991 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1992 sizeof(key->icmp.type)); 1993 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1994 &mask->icmp.code, 1995 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1996 sizeof(key->icmp.code)); 1997 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1998 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1999 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 2000 if (ret) 2001 return ret; 2002 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 2003 key->basic.n_proto == htons(ETH_P_RARP)) { 2004 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 2005 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 2006 sizeof(key->arp.sip)); 2007 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 2008 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 2009 sizeof(key->arp.tip)); 2010 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 2011 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 2012 sizeof(key->arp.op)); 2013 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2014 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2015 sizeof(key->arp.sha)); 2016 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2017 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2018 sizeof(key->arp.tha)); 2019 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 2020 fl_set_key_val(tb, &key->l2tpv3.session_id, 2021 TCA_FLOWER_KEY_L2TPV3_SID, 2022 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 2023 sizeof(key->l2tpv3.session_id)); 2024 } else if (key->basic.n_proto == htons(ETH_P_CFM)) { 2025 ret = fl_set_key_cfm(tb, key, mask, extack); 2026 if (ret) 2027 return ret; 2028 } 2029 2030 if (key->basic.ip_proto == IPPROTO_TCP || 2031 key->basic.ip_proto == IPPROTO_UDP || 2032 key->basic.ip_proto == IPPROTO_SCTP) { 2033 ret = fl_set_key_port_range(tb, key, mask, extack); 2034 if (ret) 2035 return ret; 2036 } 2037 2038 if (tb[TCA_FLOWER_KEY_SPI]) { 2039 ret = fl_set_key_spi(tb, key, mask, extack); 2040 if (ret) 2041 return ret; 2042 } 2043 2044 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 2045 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 2046 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 2047 mask->enc_control.addr_type = ~0; 2048 fl_set_key_val(tb, &key->enc_ipv4.src, 2049 TCA_FLOWER_KEY_ENC_IPV4_SRC, 2050 &mask->enc_ipv4.src, 2051 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2052 sizeof(key->enc_ipv4.src)); 2053 fl_set_key_val(tb, &key->enc_ipv4.dst, 2054 TCA_FLOWER_KEY_ENC_IPV4_DST, 2055 &mask->enc_ipv4.dst, 2056 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2057 sizeof(key->enc_ipv4.dst)); 2058 } 2059 2060 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 2061 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 2062 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 2063 mask->enc_control.addr_type = ~0; 2064 fl_set_key_val(tb, &key->enc_ipv6.src, 2065 TCA_FLOWER_KEY_ENC_IPV6_SRC, 2066 &mask->enc_ipv6.src, 2067 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2068 sizeof(key->enc_ipv6.src)); 2069 fl_set_key_val(tb, &key->enc_ipv6.dst, 2070 TCA_FLOWER_KEY_ENC_IPV6_DST, 2071 &mask->enc_ipv6.dst, 2072 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2073 sizeof(key->enc_ipv6.dst)); 2074 } 2075 2076 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 2077 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 2078 sizeof(key->enc_key_id.keyid)); 2079 2080 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2081 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2082 sizeof(key->enc_tp.src)); 2083 2084 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2085 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2086 sizeof(key->enc_tp.dst)); 2087 2088 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 2089 2090 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 2091 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 2092 sizeof(key->hash.hash)); 2093 2094 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 2095 ret = fl_set_enc_opt(tb, key, mask, extack); 2096 if (ret) 2097 return ret; 2098 } 2099 2100 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 2101 if (ret) 2102 return ret; 2103 2104 if (tb[TCA_FLOWER_KEY_FLAGS]) { 2105 ret = fl_set_key_flags(tca_opts, tb, false, 2106 &key->control.flags, 2107 &mask->control.flags, extack); 2108 if (ret) 2109 return ret; 2110 } 2111 2112 if (tb[TCA_FLOWER_KEY_ENC_FLAGS]) 2113 ret = fl_set_key_flags(tca_opts, tb, true, 2114 &key->enc_control.flags, 2115 &mask->enc_control.flags, extack); 2116 2117 return ret; 2118 } 2119 2120 static void fl_mask_copy(struct fl_flow_mask *dst, 2121 struct fl_flow_mask *src) 2122 { 2123 const void *psrc = fl_key_get_start(&src->key, src); 2124 void *pdst = fl_key_get_start(&dst->key, src); 2125 2126 memcpy(pdst, psrc, fl_mask_range(src)); 2127 dst->range = src->range; 2128 } 2129 2130 static const struct rhashtable_params fl_ht_params = { 2131 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 2132 .head_offset = offsetof(struct cls_fl_filter, ht_node), 2133 .automatic_shrinking = true, 2134 }; 2135 2136 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 2137 { 2138 mask->filter_ht_params = fl_ht_params; 2139 mask->filter_ht_params.key_len = fl_mask_range(mask); 2140 mask->filter_ht_params.key_offset += mask->range.start; 2141 2142 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 2143 } 2144 2145 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 2146 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 2147 2148 #define FL_KEY_IS_MASKED(mask, member) \ 2149 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 2150 0, FL_KEY_MEMBER_SIZE(member)) \ 2151 2152 #define FL_KEY_SET(keys, cnt, id, member) \ 2153 do { \ 2154 keys[cnt].key_id = id; \ 2155 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 2156 cnt++; \ 2157 } while(0); 2158 2159 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 2160 do { \ 2161 if (FL_KEY_IS_MASKED(mask, member)) \ 2162 FL_KEY_SET(keys, cnt, id, member); \ 2163 } while(0); 2164 2165 static void fl_init_dissector(struct flow_dissector *dissector, 2166 struct fl_flow_key *mask) 2167 { 2168 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 2169 size_t cnt = 0; 2170 2171 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2172 FLOW_DISSECTOR_KEY_META, meta); 2173 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 2174 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 2175 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2176 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 2177 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2178 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 2179 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2180 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 2181 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2182 FLOW_DISSECTOR_KEY_PORTS, tp); 2183 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2184 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 2185 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2186 FLOW_DISSECTOR_KEY_IP, ip); 2187 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2188 FLOW_DISSECTOR_KEY_TCP, tcp); 2189 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2190 FLOW_DISSECTOR_KEY_ICMP, icmp); 2191 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2192 FLOW_DISSECTOR_KEY_ARP, arp); 2193 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2194 FLOW_DISSECTOR_KEY_MPLS, mpls); 2195 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2196 FLOW_DISSECTOR_KEY_VLAN, vlan); 2197 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2198 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 2199 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2200 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 2201 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2202 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 2203 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2204 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 2205 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 2206 FL_KEY_IS_MASKED(mask, enc_ipv6) || 2207 FL_KEY_IS_MASKED(mask, enc_control)) 2208 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 2209 enc_control); 2210 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2211 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 2212 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2213 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 2214 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2215 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 2216 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2217 FLOW_DISSECTOR_KEY_CT, ct); 2218 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2219 FLOW_DISSECTOR_KEY_HASH, hash); 2220 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2221 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 2222 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2223 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 2224 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2225 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 2226 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2227 FLOW_DISSECTOR_KEY_IPSEC, ipsec); 2228 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2229 FLOW_DISSECTOR_KEY_CFM, cfm); 2230 2231 skb_flow_dissector_init(dissector, keys, cnt); 2232 } 2233 2234 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 2235 struct fl_flow_mask *mask) 2236 { 2237 struct fl_flow_mask *newmask; 2238 int err; 2239 2240 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 2241 if (!newmask) 2242 return ERR_PTR(-ENOMEM); 2243 2244 fl_mask_copy(newmask, mask); 2245 2246 if ((newmask->key.tp_range.tp_min.dst && 2247 newmask->key.tp_range.tp_max.dst) || 2248 (newmask->key.tp_range.tp_min.src && 2249 newmask->key.tp_range.tp_max.src)) 2250 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2251 2252 err = fl_init_mask_hashtable(newmask); 2253 if (err) 2254 goto errout_free; 2255 2256 fl_init_dissector(&newmask->dissector, &newmask->key); 2257 2258 INIT_LIST_HEAD_RCU(&newmask->filters); 2259 2260 refcount_set(&newmask->refcnt, 1); 2261 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2262 &newmask->ht_node, mask_ht_params); 2263 if (err) 2264 goto errout_destroy; 2265 2266 spin_lock(&head->masks_lock); 2267 list_add_tail_rcu(&newmask->list, &head->masks); 2268 spin_unlock(&head->masks_lock); 2269 2270 return newmask; 2271 2272 errout_destroy: 2273 rhashtable_destroy(&newmask->ht); 2274 errout_free: 2275 kfree(newmask); 2276 2277 return ERR_PTR(err); 2278 } 2279 2280 static int fl_check_assign_mask(struct cls_fl_head *head, 2281 struct cls_fl_filter *fnew, 2282 struct cls_fl_filter *fold, 2283 struct fl_flow_mask *mask) 2284 { 2285 struct fl_flow_mask *newmask; 2286 int ret = 0; 2287 2288 rcu_read_lock(); 2289 2290 /* Insert mask as temporary node to prevent concurrent creation of mask 2291 * with same key. Any concurrent lookups with same key will return 2292 * -EAGAIN because mask's refcnt is zero. 2293 */ 2294 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2295 &mask->ht_node, 2296 mask_ht_params); 2297 if (!fnew->mask) { 2298 rcu_read_unlock(); 2299 2300 if (fold) { 2301 ret = -EINVAL; 2302 goto errout_cleanup; 2303 } 2304 2305 newmask = fl_create_new_mask(head, mask); 2306 if (IS_ERR(newmask)) { 2307 ret = PTR_ERR(newmask); 2308 goto errout_cleanup; 2309 } 2310 2311 fnew->mask = newmask; 2312 return 0; 2313 } else if (IS_ERR(fnew->mask)) { 2314 ret = PTR_ERR(fnew->mask); 2315 } else if (fold && fold->mask != fnew->mask) { 2316 ret = -EINVAL; 2317 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2318 /* Mask was deleted concurrently, try again */ 2319 ret = -EAGAIN; 2320 } 2321 rcu_read_unlock(); 2322 return ret; 2323 2324 errout_cleanup: 2325 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2326 mask_ht_params); 2327 return ret; 2328 } 2329 2330 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) 2331 { 2332 return mask->meta.l2_miss; 2333 } 2334 2335 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2336 struct cls_fl_filter *fold, 2337 bool *in_ht) 2338 { 2339 struct fl_flow_mask *mask = fnew->mask; 2340 int err; 2341 2342 err = rhashtable_lookup_insert_fast(&mask->ht, 2343 &fnew->ht_node, 2344 mask->filter_ht_params); 2345 if (err) { 2346 *in_ht = false; 2347 /* It is okay if filter with same key exists when 2348 * overwriting. 2349 */ 2350 return fold && err == -EEXIST ? 0 : err; 2351 } 2352 2353 *in_ht = true; 2354 return 0; 2355 } 2356 2357 static int fl_change(struct net *net, struct sk_buff *in_skb, 2358 struct tcf_proto *tp, unsigned long base, 2359 u32 handle, struct nlattr **tca, 2360 void **arg, u32 flags, 2361 struct netlink_ext_ack *extack) 2362 { 2363 struct cls_fl_head *head = fl_head_dereference(tp); 2364 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2365 struct nlattr *tca_opts = tca[TCA_OPTIONS]; 2366 struct cls_fl_filter *fold = *arg; 2367 bool bound_to_filter = false; 2368 struct cls_fl_filter *fnew; 2369 struct fl_flow_mask *mask; 2370 struct nlattr **tb; 2371 bool in_ht; 2372 int err; 2373 2374 if (!tca_opts) { 2375 err = -EINVAL; 2376 goto errout_fold; 2377 } 2378 2379 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2380 if (!mask) { 2381 err = -ENOBUFS; 2382 goto errout_fold; 2383 } 2384 2385 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2386 if (!tb) { 2387 err = -ENOBUFS; 2388 goto errout_mask_alloc; 2389 } 2390 2391 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2392 tca_opts, fl_policy, NULL); 2393 if (err < 0) 2394 goto errout_tb; 2395 2396 if (fold && handle && fold->handle != handle) { 2397 err = -EINVAL; 2398 goto errout_tb; 2399 } 2400 2401 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2402 if (!fnew) { 2403 err = -ENOBUFS; 2404 goto errout_tb; 2405 } 2406 INIT_LIST_HEAD(&fnew->hw_list); 2407 refcount_set(&fnew->refcnt, 1); 2408 2409 if (tb[TCA_FLOWER_FLAGS]) { 2410 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2411 2412 if (!tc_flags_valid(fnew->flags)) { 2413 kfree(fnew); 2414 err = -EINVAL; 2415 goto errout_tb; 2416 } 2417 } 2418 2419 if (!fold) { 2420 spin_lock(&tp->lock); 2421 if (!handle) { 2422 handle = 1; 2423 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2424 INT_MAX, GFP_ATOMIC); 2425 } else { 2426 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2427 handle, GFP_ATOMIC); 2428 2429 /* Filter with specified handle was concurrently 2430 * inserted after initial check in cls_api. This is not 2431 * necessarily an error if NLM_F_EXCL is not set in 2432 * message flags. Returning EAGAIN will cause cls_api to 2433 * try to update concurrently inserted rule. 2434 */ 2435 if (err == -ENOSPC) 2436 err = -EAGAIN; 2437 } 2438 spin_unlock(&tp->lock); 2439 2440 if (err) { 2441 kfree(fnew); 2442 goto errout_tb; 2443 } 2444 } 2445 fnew->handle = handle; 2446 2447 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2448 !tc_skip_hw(fnew->flags)); 2449 if (err < 0) 2450 goto errout_idr; 2451 2452 err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], 2453 &fnew->exts, flags, fnew->flags, 2454 extack); 2455 if (err < 0) 2456 goto errout_idr; 2457 2458 if (tb[TCA_FLOWER_CLASSID]) { 2459 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2460 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2461 rtnl_lock(); 2462 tcf_bind_filter(tp, &fnew->res, base); 2463 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2464 rtnl_unlock(); 2465 bound_to_filter = true; 2466 } 2467 2468 err = fl_set_key(net, tca_opts, tb, &fnew->key, &mask->key, extack); 2469 if (err) 2470 goto unbind_filter; 2471 2472 fl_mask_update_range(mask); 2473 fl_set_masked_key(&fnew->mkey, &fnew->key, mask); 2474 2475 if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { 2476 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2477 err = -EINVAL; 2478 goto unbind_filter; 2479 } 2480 2481 /* Enable tc skb extension if filter matches on data extracted from 2482 * this extension. 2483 */ 2484 if (fl_needs_tc_skb_ext(&mask->key)) { 2485 fnew->needs_tc_skb_ext = 1; 2486 tc_skb_ext_tc_enable(); 2487 } 2488 2489 err = fl_check_assign_mask(head, fnew, fold, mask); 2490 if (err) 2491 goto unbind_filter; 2492 2493 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2494 if (err) 2495 goto errout_mask; 2496 2497 if (!tc_skip_hw(fnew->flags)) { 2498 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2499 if (err) 2500 goto errout_ht; 2501 } 2502 2503 if (!tc_in_hw(fnew->flags)) 2504 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2505 2506 tcf_proto_update_usesw(tp, fnew->flags); 2507 2508 spin_lock(&tp->lock); 2509 2510 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2511 * proto again or create new one, if necessary. 2512 */ 2513 if (tp->deleting) { 2514 err = -EAGAIN; 2515 goto errout_hw; 2516 } 2517 2518 if (fold) { 2519 /* Fold filter was deleted concurrently. Retry lookup. */ 2520 if (fold->deleted) { 2521 err = -EAGAIN; 2522 goto errout_hw; 2523 } 2524 2525 fnew->handle = handle; 2526 2527 if (!in_ht) { 2528 struct rhashtable_params params = 2529 fnew->mask->filter_ht_params; 2530 2531 err = rhashtable_insert_fast(&fnew->mask->ht, 2532 &fnew->ht_node, 2533 params); 2534 if (err) 2535 goto errout_hw; 2536 in_ht = true; 2537 } 2538 2539 refcount_inc(&fnew->refcnt); 2540 rhashtable_remove_fast(&fold->mask->ht, 2541 &fold->ht_node, 2542 fold->mask->filter_ht_params); 2543 idr_replace(&head->handle_idr, fnew, fnew->handle); 2544 list_replace_rcu(&fold->list, &fnew->list); 2545 fold->deleted = true; 2546 2547 spin_unlock(&tp->lock); 2548 2549 fl_mask_put(head, fold->mask); 2550 if (!tc_skip_hw(fold->flags)) 2551 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2552 tcf_unbind_filter(tp, &fold->res); 2553 /* Caller holds reference to fold, so refcnt is always > 0 2554 * after this. 2555 */ 2556 refcount_dec(&fold->refcnt); 2557 __fl_put(fold); 2558 } else { 2559 idr_replace(&head->handle_idr, fnew, fnew->handle); 2560 2561 refcount_inc(&fnew->refcnt); 2562 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2563 spin_unlock(&tp->lock); 2564 } 2565 2566 *arg = fnew; 2567 2568 kfree(tb); 2569 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2570 return 0; 2571 2572 errout_ht: 2573 spin_lock(&tp->lock); 2574 errout_hw: 2575 fnew->deleted = true; 2576 spin_unlock(&tp->lock); 2577 if (!tc_skip_hw(fnew->flags)) 2578 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2579 if (in_ht) 2580 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2581 fnew->mask->filter_ht_params); 2582 errout_mask: 2583 fl_mask_put(head, fnew->mask); 2584 2585 unbind_filter: 2586 if (bound_to_filter) { 2587 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2588 rtnl_lock(); 2589 tcf_unbind_filter(tp, &fnew->res); 2590 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2591 rtnl_unlock(); 2592 } 2593 2594 errout_idr: 2595 if (!fold) { 2596 spin_lock(&tp->lock); 2597 idr_remove(&head->handle_idr, fnew->handle); 2598 spin_unlock(&tp->lock); 2599 } 2600 __fl_put(fnew); 2601 errout_tb: 2602 kfree(tb); 2603 errout_mask_alloc: 2604 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2605 errout_fold: 2606 if (fold) 2607 __fl_put(fold); 2608 return err; 2609 } 2610 2611 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2612 bool rtnl_held, struct netlink_ext_ack *extack) 2613 { 2614 struct cls_fl_head *head = fl_head_dereference(tp); 2615 struct cls_fl_filter *f = arg; 2616 bool last_on_mask; 2617 int err = 0; 2618 2619 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2620 *last = list_empty(&head->masks); 2621 __fl_put(f); 2622 2623 return err; 2624 } 2625 2626 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2627 bool rtnl_held) 2628 { 2629 struct cls_fl_head *head = fl_head_dereference(tp); 2630 unsigned long id = arg->cookie, tmp; 2631 struct cls_fl_filter *f; 2632 2633 arg->count = arg->skip; 2634 2635 rcu_read_lock(); 2636 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2637 /* don't return filters that are being deleted */ 2638 if (!f || !refcount_inc_not_zero(&f->refcnt)) 2639 continue; 2640 rcu_read_unlock(); 2641 2642 if (arg->fn(tp, f, arg) < 0) { 2643 __fl_put(f); 2644 arg->stop = 1; 2645 rcu_read_lock(); 2646 break; 2647 } 2648 __fl_put(f); 2649 arg->count++; 2650 rcu_read_lock(); 2651 } 2652 rcu_read_unlock(); 2653 arg->cookie = id; 2654 } 2655 2656 static struct cls_fl_filter * 2657 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2658 { 2659 struct cls_fl_head *head = fl_head_dereference(tp); 2660 2661 spin_lock(&tp->lock); 2662 if (list_empty(&head->hw_filters)) { 2663 spin_unlock(&tp->lock); 2664 return NULL; 2665 } 2666 2667 if (!f) 2668 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2669 hw_list); 2670 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2671 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2672 spin_unlock(&tp->lock); 2673 return f; 2674 } 2675 } 2676 2677 spin_unlock(&tp->lock); 2678 return NULL; 2679 } 2680 2681 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2682 void *cb_priv, struct netlink_ext_ack *extack) 2683 { 2684 struct tcf_block *block = tp->chain->block; 2685 struct flow_cls_offload cls_flower = {}; 2686 struct cls_fl_filter *f = NULL; 2687 int err; 2688 2689 /* hw_filters list can only be changed by hw offload functions after 2690 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2691 * iterating it. 2692 */ 2693 ASSERT_RTNL(); 2694 2695 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2696 cls_flower.rule = 2697 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2698 if (!cls_flower.rule) { 2699 __fl_put(f); 2700 return -ENOMEM; 2701 } 2702 2703 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2704 extack); 2705 cls_flower.command = add ? 2706 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2707 cls_flower.cookie = (unsigned long)f; 2708 cls_flower.rule->match.dissector = &f->mask->dissector; 2709 cls_flower.rule->match.mask = &f->mask->key; 2710 cls_flower.rule->match.key = &f->mkey; 2711 2712 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2713 cls_flower.common.extack); 2714 if (err) { 2715 kfree(cls_flower.rule); 2716 if (tc_skip_sw(f->flags)) { 2717 __fl_put(f); 2718 return err; 2719 } 2720 goto next_flow; 2721 } 2722 2723 cls_flower.classid = f->res.classid; 2724 2725 err = tc_setup_cb_reoffload(block, tp, add, cb, 2726 TC_SETUP_CLSFLOWER, &cls_flower, 2727 cb_priv, &f->flags, 2728 &f->in_hw_count); 2729 tc_cleanup_offload_action(&cls_flower.rule->action); 2730 kfree(cls_flower.rule); 2731 2732 if (err) { 2733 __fl_put(f); 2734 return err; 2735 } 2736 next_flow: 2737 __fl_put(f); 2738 } 2739 2740 return 0; 2741 } 2742 2743 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2744 { 2745 struct flow_cls_offload *cls_flower = type_data; 2746 struct cls_fl_filter *f = 2747 (struct cls_fl_filter *) cls_flower->cookie; 2748 struct cls_fl_head *head = fl_head_dereference(tp); 2749 2750 spin_lock(&tp->lock); 2751 list_add(&f->hw_list, &head->hw_filters); 2752 spin_unlock(&tp->lock); 2753 } 2754 2755 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2756 { 2757 struct flow_cls_offload *cls_flower = type_data; 2758 struct cls_fl_filter *f = 2759 (struct cls_fl_filter *) cls_flower->cookie; 2760 2761 spin_lock(&tp->lock); 2762 if (!list_empty(&f->hw_list)) 2763 list_del_init(&f->hw_list); 2764 spin_unlock(&tp->lock); 2765 } 2766 2767 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2768 struct fl_flow_tmplt *tmplt) 2769 { 2770 struct flow_cls_offload cls_flower = {}; 2771 struct tcf_block *block = chain->block; 2772 2773 cls_flower.rule = flow_rule_alloc(0); 2774 if (!cls_flower.rule) 2775 return -ENOMEM; 2776 2777 cls_flower.common.chain_index = chain->index; 2778 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2779 cls_flower.cookie = (unsigned long) tmplt; 2780 cls_flower.rule->match.dissector = &tmplt->dissector; 2781 cls_flower.rule->match.mask = &tmplt->mask; 2782 cls_flower.rule->match.key = &tmplt->dummy_key; 2783 2784 /* We don't care if driver (any of them) fails to handle this 2785 * call. It serves just as a hint for it. 2786 */ 2787 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2788 kfree(cls_flower.rule); 2789 2790 return 0; 2791 } 2792 2793 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2794 struct fl_flow_tmplt *tmplt) 2795 { 2796 struct flow_cls_offload cls_flower = {}; 2797 struct tcf_block *block = chain->block; 2798 2799 cls_flower.common.chain_index = chain->index; 2800 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2801 cls_flower.cookie = (unsigned long) tmplt; 2802 2803 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2804 } 2805 2806 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2807 struct nlattr **tca, 2808 struct netlink_ext_ack *extack) 2809 { 2810 struct nlattr *tca_opts = tca[TCA_OPTIONS]; 2811 struct fl_flow_tmplt *tmplt; 2812 struct nlattr **tb; 2813 int err; 2814 2815 if (!tca_opts) 2816 return ERR_PTR(-EINVAL); 2817 2818 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2819 if (!tb) 2820 return ERR_PTR(-ENOBUFS); 2821 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2822 tca_opts, fl_policy, NULL); 2823 if (err) 2824 goto errout_tb; 2825 2826 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2827 if (!tmplt) { 2828 err = -ENOMEM; 2829 goto errout_tb; 2830 } 2831 tmplt->chain = chain; 2832 err = fl_set_key(net, tca_opts, tb, &tmplt->dummy_key, 2833 &tmplt->mask, extack); 2834 if (err) 2835 goto errout_tmplt; 2836 2837 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2838 2839 err = fl_hw_create_tmplt(chain, tmplt); 2840 if (err) 2841 goto errout_tmplt; 2842 2843 kfree(tb); 2844 return tmplt; 2845 2846 errout_tmplt: 2847 kfree(tmplt); 2848 errout_tb: 2849 kfree(tb); 2850 return ERR_PTR(err); 2851 } 2852 2853 static void fl_tmplt_destroy(void *tmplt_priv) 2854 { 2855 struct fl_flow_tmplt *tmplt = tmplt_priv; 2856 2857 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2858 kfree(tmplt); 2859 } 2860 2861 static void fl_tmplt_reoffload(struct tcf_chain *chain, bool add, 2862 flow_setup_cb_t *cb, void *cb_priv) 2863 { 2864 struct fl_flow_tmplt *tmplt = chain->tmplt_priv; 2865 struct flow_cls_offload cls_flower = {}; 2866 2867 cls_flower.rule = flow_rule_alloc(0); 2868 if (!cls_flower.rule) 2869 return; 2870 2871 cls_flower.common.chain_index = chain->index; 2872 cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE : 2873 FLOW_CLS_TMPLT_DESTROY; 2874 cls_flower.cookie = (unsigned long) tmplt; 2875 cls_flower.rule->match.dissector = &tmplt->dissector; 2876 cls_flower.rule->match.mask = &tmplt->mask; 2877 cls_flower.rule->match.key = &tmplt->dummy_key; 2878 2879 cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 2880 kfree(cls_flower.rule); 2881 } 2882 2883 static int fl_dump_key_val(struct sk_buff *skb, 2884 void *val, int val_type, 2885 void *mask, int mask_type, int len) 2886 { 2887 int err; 2888 2889 if (!memchr_inv(mask, 0, len)) 2890 return 0; 2891 err = nla_put(skb, val_type, len, val); 2892 if (err) 2893 return err; 2894 if (mask_type != TCA_FLOWER_UNSPEC) { 2895 err = nla_put(skb, mask_type, len, mask); 2896 if (err) 2897 return err; 2898 } 2899 return 0; 2900 } 2901 2902 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2903 struct fl_flow_key *mask) 2904 { 2905 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2906 TCA_FLOWER_KEY_PORT_DST_MIN, 2907 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2908 sizeof(key->tp_range.tp_min.dst)) || 2909 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2910 TCA_FLOWER_KEY_PORT_DST_MAX, 2911 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2912 sizeof(key->tp_range.tp_max.dst)) || 2913 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2914 TCA_FLOWER_KEY_PORT_SRC_MIN, 2915 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2916 sizeof(key->tp_range.tp_min.src)) || 2917 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2918 TCA_FLOWER_KEY_PORT_SRC_MAX, 2919 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2920 sizeof(key->tp_range.tp_max.src))) 2921 return -1; 2922 2923 return 0; 2924 } 2925 2926 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2927 struct flow_dissector_key_mpls *mpls_key, 2928 struct flow_dissector_key_mpls *mpls_mask, 2929 u8 lse_index) 2930 { 2931 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2932 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2933 int err; 2934 2935 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2936 lse_index + 1); 2937 if (err) 2938 return err; 2939 2940 if (lse_mask->mpls_ttl) { 2941 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2942 lse_key->mpls_ttl); 2943 if (err) 2944 return err; 2945 } 2946 if (lse_mask->mpls_bos) { 2947 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2948 lse_key->mpls_bos); 2949 if (err) 2950 return err; 2951 } 2952 if (lse_mask->mpls_tc) { 2953 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2954 lse_key->mpls_tc); 2955 if (err) 2956 return err; 2957 } 2958 if (lse_mask->mpls_label) { 2959 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2960 lse_key->mpls_label); 2961 if (err) 2962 return err; 2963 } 2964 2965 return 0; 2966 } 2967 2968 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2969 struct flow_dissector_key_mpls *mpls_key, 2970 struct flow_dissector_key_mpls *mpls_mask) 2971 { 2972 struct nlattr *opts; 2973 struct nlattr *lse; 2974 u8 lse_index; 2975 int err; 2976 2977 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2978 if (!opts) 2979 return -EMSGSIZE; 2980 2981 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2982 if (!(mpls_mask->used_lses & 1 << lse_index)) 2983 continue; 2984 2985 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2986 if (!lse) { 2987 err = -EMSGSIZE; 2988 goto err_opts; 2989 } 2990 2991 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2992 lse_index); 2993 if (err) 2994 goto err_opts_lse; 2995 nla_nest_end(skb, lse); 2996 } 2997 nla_nest_end(skb, opts); 2998 2999 return 0; 3000 3001 err_opts_lse: 3002 nla_nest_cancel(skb, lse); 3003 err_opts: 3004 nla_nest_cancel(skb, opts); 3005 3006 return err; 3007 } 3008 3009 static int fl_dump_key_mpls(struct sk_buff *skb, 3010 struct flow_dissector_key_mpls *mpls_key, 3011 struct flow_dissector_key_mpls *mpls_mask) 3012 { 3013 struct flow_dissector_mpls_lse *lse_mask; 3014 struct flow_dissector_mpls_lse *lse_key; 3015 int err; 3016 3017 if (!mpls_mask->used_lses) 3018 return 0; 3019 3020 lse_mask = &mpls_mask->ls[0]; 3021 lse_key = &mpls_key->ls[0]; 3022 3023 /* For backward compatibility, don't use the MPLS nested attributes if 3024 * the rule can be expressed using the old attributes. 3025 */ 3026 if (mpls_mask->used_lses & ~1 || 3027 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 3028 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 3029 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 3030 3031 if (lse_mask->mpls_ttl) { 3032 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 3033 lse_key->mpls_ttl); 3034 if (err) 3035 return err; 3036 } 3037 if (lse_mask->mpls_tc) { 3038 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 3039 lse_key->mpls_tc); 3040 if (err) 3041 return err; 3042 } 3043 if (lse_mask->mpls_label) { 3044 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 3045 lse_key->mpls_label); 3046 if (err) 3047 return err; 3048 } 3049 if (lse_mask->mpls_bos) { 3050 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 3051 lse_key->mpls_bos); 3052 if (err) 3053 return err; 3054 } 3055 return 0; 3056 } 3057 3058 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 3059 struct flow_dissector_key_ip *key, 3060 struct flow_dissector_key_ip *mask) 3061 { 3062 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 3063 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 3064 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 3065 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 3066 3067 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 3068 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 3069 return -1; 3070 3071 return 0; 3072 } 3073 3074 static int fl_dump_key_vlan(struct sk_buff *skb, 3075 int vlan_id_key, int vlan_prio_key, 3076 struct flow_dissector_key_vlan *vlan_key, 3077 struct flow_dissector_key_vlan *vlan_mask) 3078 { 3079 int err; 3080 3081 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 3082 return 0; 3083 if (vlan_mask->vlan_id) { 3084 err = nla_put_u16(skb, vlan_id_key, 3085 vlan_key->vlan_id); 3086 if (err) 3087 return err; 3088 } 3089 if (vlan_mask->vlan_priority) { 3090 err = nla_put_u8(skb, vlan_prio_key, 3091 vlan_key->vlan_priority); 3092 if (err) 3093 return err; 3094 } 3095 return 0; 3096 } 3097 3098 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 3099 u32 *flower_key, u32 *flower_mask, 3100 u32 flower_flag_bit, u32 dissector_flag_bit) 3101 { 3102 if (dissector_mask & dissector_flag_bit) { 3103 *flower_mask |= flower_flag_bit; 3104 if (dissector_key & dissector_flag_bit) 3105 *flower_key |= flower_flag_bit; 3106 } 3107 } 3108 3109 static int fl_dump_key_flags(struct sk_buff *skb, bool encap, 3110 u32 flags_key, u32 flags_mask) 3111 { 3112 int fl_key, fl_mask; 3113 __be32 _key, _mask; 3114 u32 key, mask; 3115 int err; 3116 3117 if (encap) { 3118 fl_key = TCA_FLOWER_KEY_ENC_FLAGS; 3119 fl_mask = TCA_FLOWER_KEY_ENC_FLAGS_MASK; 3120 } else { 3121 fl_key = TCA_FLOWER_KEY_FLAGS; 3122 fl_mask = TCA_FLOWER_KEY_FLAGS_MASK; 3123 } 3124 3125 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 3126 return 0; 3127 3128 key = 0; 3129 mask = 0; 3130 3131 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3132 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 3133 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3134 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 3135 FLOW_DIS_FIRST_FRAG); 3136 3137 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3138 TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM, 3139 FLOW_DIS_F_TUNNEL_CSUM); 3140 3141 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3142 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT, 3143 FLOW_DIS_F_TUNNEL_DONT_FRAGMENT); 3144 3145 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3146 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM, FLOW_DIS_F_TUNNEL_OAM); 3147 3148 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3149 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT, 3150 FLOW_DIS_F_TUNNEL_CRIT_OPT); 3151 3152 _key = cpu_to_be32(key); 3153 _mask = cpu_to_be32(mask); 3154 3155 err = nla_put(skb, fl_key, 4, &_key); 3156 if (err) 3157 return err; 3158 3159 return nla_put(skb, fl_mask, 4, &_mask); 3160 } 3161 3162 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 3163 struct flow_dissector_key_enc_opts *enc_opts) 3164 { 3165 struct geneve_opt *opt; 3166 struct nlattr *nest; 3167 int opt_off = 0; 3168 3169 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 3170 if (!nest) 3171 goto nla_put_failure; 3172 3173 while (enc_opts->len > opt_off) { 3174 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 3175 3176 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 3177 opt->opt_class)) 3178 goto nla_put_failure; 3179 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 3180 opt->type)) 3181 goto nla_put_failure; 3182 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 3183 opt->length * 4, opt->opt_data)) 3184 goto nla_put_failure; 3185 3186 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 3187 } 3188 nla_nest_end(skb, nest); 3189 return 0; 3190 3191 nla_put_failure: 3192 nla_nest_cancel(skb, nest); 3193 return -EMSGSIZE; 3194 } 3195 3196 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 3197 struct flow_dissector_key_enc_opts *enc_opts) 3198 { 3199 struct vxlan_metadata *md; 3200 struct nlattr *nest; 3201 3202 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 3203 if (!nest) 3204 goto nla_put_failure; 3205 3206 md = (struct vxlan_metadata *)&enc_opts->data[0]; 3207 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 3208 goto nla_put_failure; 3209 3210 nla_nest_end(skb, nest); 3211 return 0; 3212 3213 nla_put_failure: 3214 nla_nest_cancel(skb, nest); 3215 return -EMSGSIZE; 3216 } 3217 3218 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 3219 struct flow_dissector_key_enc_opts *enc_opts) 3220 { 3221 struct erspan_metadata *md; 3222 struct nlattr *nest; 3223 3224 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 3225 if (!nest) 3226 goto nla_put_failure; 3227 3228 md = (struct erspan_metadata *)&enc_opts->data[0]; 3229 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 3230 goto nla_put_failure; 3231 3232 if (md->version == 1 && 3233 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 3234 goto nla_put_failure; 3235 3236 if (md->version == 2 && 3237 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 3238 md->u.md2.dir) || 3239 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 3240 get_hwid(&md->u.md2)))) 3241 goto nla_put_failure; 3242 3243 nla_nest_end(skb, nest); 3244 return 0; 3245 3246 nla_put_failure: 3247 nla_nest_cancel(skb, nest); 3248 return -EMSGSIZE; 3249 } 3250 3251 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 3252 struct flow_dissector_key_enc_opts *enc_opts) 3253 3254 { 3255 struct gtp_pdu_session_info *session_info; 3256 struct nlattr *nest; 3257 3258 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 3259 if (!nest) 3260 goto nla_put_failure; 3261 3262 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 3263 3264 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 3265 session_info->pdu_type)) 3266 goto nla_put_failure; 3267 3268 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 3269 goto nla_put_failure; 3270 3271 nla_nest_end(skb, nest); 3272 return 0; 3273 3274 nla_put_failure: 3275 nla_nest_cancel(skb, nest); 3276 return -EMSGSIZE; 3277 } 3278 3279 static int fl_dump_key_pfcp_opt(struct sk_buff *skb, 3280 struct flow_dissector_key_enc_opts *enc_opts) 3281 { 3282 struct pfcp_metadata *md; 3283 struct nlattr *nest; 3284 3285 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_PFCP); 3286 if (!nest) 3287 goto nla_put_failure; 3288 3289 md = (struct pfcp_metadata *)&enc_opts->data[0]; 3290 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE, md->type)) 3291 goto nla_put_failure; 3292 3293 if (nla_put_be64(skb, TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID, 3294 md->seid, 0)) 3295 goto nla_put_failure; 3296 3297 nla_nest_end(skb, nest); 3298 return 0; 3299 3300 nla_put_failure: 3301 nla_nest_cancel(skb, nest); 3302 return -EMSGSIZE; 3303 } 3304 3305 static int fl_dump_key_ct(struct sk_buff *skb, 3306 struct flow_dissector_key_ct *key, 3307 struct flow_dissector_key_ct *mask) 3308 { 3309 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 3310 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 3311 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 3312 sizeof(key->ct_state))) 3313 goto nla_put_failure; 3314 3315 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 3316 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 3317 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 3318 sizeof(key->ct_zone))) 3319 goto nla_put_failure; 3320 3321 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3322 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 3323 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 3324 sizeof(key->ct_mark))) 3325 goto nla_put_failure; 3326 3327 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3328 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 3329 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 3330 sizeof(key->ct_labels))) 3331 goto nla_put_failure; 3332 3333 return 0; 3334 3335 nla_put_failure: 3336 return -EMSGSIZE; 3337 } 3338 3339 static int fl_dump_key_cfm(struct sk_buff *skb, 3340 struct flow_dissector_key_cfm *key, 3341 struct flow_dissector_key_cfm *mask) 3342 { 3343 struct nlattr *opts; 3344 int err; 3345 u8 mdl; 3346 3347 if (!memchr_inv(mask, 0, sizeof(*mask))) 3348 return 0; 3349 3350 opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); 3351 if (!opts) 3352 return -EMSGSIZE; 3353 3354 if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { 3355 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); 3356 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); 3357 if (err) 3358 goto err_cfm_opts; 3359 } 3360 3361 if (mask->opcode) { 3362 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); 3363 if (err) 3364 goto err_cfm_opts; 3365 } 3366 3367 nla_nest_end(skb, opts); 3368 3369 return 0; 3370 3371 err_cfm_opts: 3372 nla_nest_cancel(skb, opts); 3373 return err; 3374 } 3375 3376 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3377 struct flow_dissector_key_enc_opts *enc_opts) 3378 { 3379 struct nlattr *nest; 3380 int err; 3381 3382 if (!enc_opts->len) 3383 return 0; 3384 3385 nest = nla_nest_start_noflag(skb, enc_opt_type); 3386 if (!nest) 3387 goto nla_put_failure; 3388 3389 switch (enc_opts->dst_opt_type) { 3390 case IP_TUNNEL_GENEVE_OPT_BIT: 3391 err = fl_dump_key_geneve_opt(skb, enc_opts); 3392 if (err) 3393 goto nla_put_failure; 3394 break; 3395 case IP_TUNNEL_VXLAN_OPT_BIT: 3396 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3397 if (err) 3398 goto nla_put_failure; 3399 break; 3400 case IP_TUNNEL_ERSPAN_OPT_BIT: 3401 err = fl_dump_key_erspan_opt(skb, enc_opts); 3402 if (err) 3403 goto nla_put_failure; 3404 break; 3405 case IP_TUNNEL_GTP_OPT_BIT: 3406 err = fl_dump_key_gtp_opt(skb, enc_opts); 3407 if (err) 3408 goto nla_put_failure; 3409 break; 3410 case IP_TUNNEL_PFCP_OPT_BIT: 3411 err = fl_dump_key_pfcp_opt(skb, enc_opts); 3412 if (err) 3413 goto nla_put_failure; 3414 break; 3415 default: 3416 goto nla_put_failure; 3417 } 3418 nla_nest_end(skb, nest); 3419 return 0; 3420 3421 nla_put_failure: 3422 nla_nest_cancel(skb, nest); 3423 return -EMSGSIZE; 3424 } 3425 3426 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3427 struct flow_dissector_key_enc_opts *key_opts, 3428 struct flow_dissector_key_enc_opts *msk_opts) 3429 { 3430 int err; 3431 3432 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3433 if (err) 3434 return err; 3435 3436 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3437 } 3438 3439 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3440 struct fl_flow_key *key, struct fl_flow_key *mask) 3441 { 3442 if (mask->meta.ingress_ifindex) { 3443 struct net_device *dev; 3444 3445 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3446 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3447 goto nla_put_failure; 3448 } 3449 3450 if (fl_dump_key_val(skb, &key->meta.l2_miss, 3451 TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, 3452 TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 3453 goto nla_put_failure; 3454 3455 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3456 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3457 sizeof(key->eth.dst)) || 3458 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3459 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3460 sizeof(key->eth.src)) || 3461 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3462 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3463 sizeof(key->basic.n_proto))) 3464 goto nla_put_failure; 3465 3466 if (mask->num_of_vlans.num_of_vlans) { 3467 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3468 goto nla_put_failure; 3469 } 3470 3471 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3472 goto nla_put_failure; 3473 3474 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3475 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3476 goto nla_put_failure; 3477 3478 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3479 TCA_FLOWER_KEY_CVLAN_PRIO, 3480 &key->cvlan, &mask->cvlan) || 3481 (mask->cvlan.vlan_tpid && 3482 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3483 key->cvlan.vlan_tpid))) 3484 goto nla_put_failure; 3485 3486 if (mask->basic.n_proto) { 3487 if (mask->cvlan.vlan_eth_type) { 3488 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3489 key->basic.n_proto)) 3490 goto nla_put_failure; 3491 } else if (mask->vlan.vlan_eth_type) { 3492 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3493 key->vlan.vlan_eth_type)) 3494 goto nla_put_failure; 3495 } 3496 } 3497 3498 if ((key->basic.n_proto == htons(ETH_P_IP) || 3499 key->basic.n_proto == htons(ETH_P_IPV6)) && 3500 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3501 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3502 sizeof(key->basic.ip_proto)) || 3503 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3504 goto nla_put_failure; 3505 3506 if (mask->pppoe.session_id) { 3507 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3508 key->pppoe.session_id)) 3509 goto nla_put_failure; 3510 } 3511 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3512 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3513 key->pppoe.ppp_proto)) 3514 goto nla_put_failure; 3515 } 3516 3517 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3518 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3519 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3520 sizeof(key->ipv4.src)) || 3521 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3522 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3523 sizeof(key->ipv4.dst)))) 3524 goto nla_put_failure; 3525 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3526 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3527 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3528 sizeof(key->ipv6.src)) || 3529 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3530 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3531 sizeof(key->ipv6.dst)))) 3532 goto nla_put_failure; 3533 3534 if (key->basic.ip_proto == IPPROTO_TCP && 3535 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3536 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3537 sizeof(key->tp.src)) || 3538 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3539 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3540 sizeof(key->tp.dst)) || 3541 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3542 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3543 sizeof(key->tcp.flags)))) 3544 goto nla_put_failure; 3545 else if (key->basic.ip_proto == IPPROTO_UDP && 3546 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3547 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3548 sizeof(key->tp.src)) || 3549 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3550 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3551 sizeof(key->tp.dst)))) 3552 goto nla_put_failure; 3553 else if (key->basic.ip_proto == IPPROTO_SCTP && 3554 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3555 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3556 sizeof(key->tp.src)) || 3557 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3558 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3559 sizeof(key->tp.dst)))) 3560 goto nla_put_failure; 3561 else if (key->basic.n_proto == htons(ETH_P_IP) && 3562 key->basic.ip_proto == IPPROTO_ICMP && 3563 (fl_dump_key_val(skb, &key->icmp.type, 3564 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3565 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3566 sizeof(key->icmp.type)) || 3567 fl_dump_key_val(skb, &key->icmp.code, 3568 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3569 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3570 sizeof(key->icmp.code)))) 3571 goto nla_put_failure; 3572 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3573 key->basic.ip_proto == IPPROTO_ICMPV6 && 3574 (fl_dump_key_val(skb, &key->icmp.type, 3575 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3576 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3577 sizeof(key->icmp.type)) || 3578 fl_dump_key_val(skb, &key->icmp.code, 3579 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3580 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3581 sizeof(key->icmp.code)))) 3582 goto nla_put_failure; 3583 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3584 key->basic.n_proto == htons(ETH_P_RARP)) && 3585 (fl_dump_key_val(skb, &key->arp.sip, 3586 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3587 TCA_FLOWER_KEY_ARP_SIP_MASK, 3588 sizeof(key->arp.sip)) || 3589 fl_dump_key_val(skb, &key->arp.tip, 3590 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3591 TCA_FLOWER_KEY_ARP_TIP_MASK, 3592 sizeof(key->arp.tip)) || 3593 fl_dump_key_val(skb, &key->arp.op, 3594 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3595 TCA_FLOWER_KEY_ARP_OP_MASK, 3596 sizeof(key->arp.op)) || 3597 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3598 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3599 sizeof(key->arp.sha)) || 3600 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3601 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3602 sizeof(key->arp.tha)))) 3603 goto nla_put_failure; 3604 else if (key->basic.ip_proto == IPPROTO_L2TP && 3605 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3606 TCA_FLOWER_KEY_L2TPV3_SID, 3607 &mask->l2tpv3.session_id, 3608 TCA_FLOWER_UNSPEC, 3609 sizeof(key->l2tpv3.session_id))) 3610 goto nla_put_failure; 3611 3612 if (key->ipsec.spi && 3613 fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, 3614 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 3615 sizeof(key->ipsec.spi))) 3616 goto nla_put_failure; 3617 3618 if ((key->basic.ip_proto == IPPROTO_TCP || 3619 key->basic.ip_proto == IPPROTO_UDP || 3620 key->basic.ip_proto == IPPROTO_SCTP) && 3621 fl_dump_key_port_range(skb, key, mask)) 3622 goto nla_put_failure; 3623 3624 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3625 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3626 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3627 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3628 sizeof(key->enc_ipv4.src)) || 3629 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3630 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3631 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3632 sizeof(key->enc_ipv4.dst)))) 3633 goto nla_put_failure; 3634 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3635 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3636 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3637 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3638 sizeof(key->enc_ipv6.src)) || 3639 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3640 TCA_FLOWER_KEY_ENC_IPV6_DST, 3641 &mask->enc_ipv6.dst, 3642 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3643 sizeof(key->enc_ipv6.dst)))) 3644 goto nla_put_failure; 3645 3646 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3647 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3648 sizeof(key->enc_key_id)) || 3649 fl_dump_key_val(skb, &key->enc_tp.src, 3650 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3651 &mask->enc_tp.src, 3652 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3653 sizeof(key->enc_tp.src)) || 3654 fl_dump_key_val(skb, &key->enc_tp.dst, 3655 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3656 &mask->enc_tp.dst, 3657 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3658 sizeof(key->enc_tp.dst)) || 3659 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3660 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3661 goto nla_put_failure; 3662 3663 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3664 goto nla_put_failure; 3665 3666 if (fl_dump_key_flags(skb, false, key->control.flags, 3667 mask->control.flags)) 3668 goto nla_put_failure; 3669 3670 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3671 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3672 sizeof(key->hash.hash))) 3673 goto nla_put_failure; 3674 3675 if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 3676 goto nla_put_failure; 3677 3678 if (fl_dump_key_flags(skb, true, key->enc_control.flags, 3679 mask->enc_control.flags)) 3680 goto nla_put_failure; 3681 3682 return 0; 3683 3684 nla_put_failure: 3685 return -EMSGSIZE; 3686 } 3687 3688 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3689 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3690 { 3691 struct cls_fl_filter *f = fh; 3692 struct nlattr *nest; 3693 struct fl_flow_key *key, *mask; 3694 bool skip_hw; 3695 3696 if (!f) 3697 return skb->len; 3698 3699 t->tcm_handle = f->handle; 3700 3701 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3702 if (!nest) 3703 goto nla_put_failure; 3704 3705 spin_lock(&tp->lock); 3706 3707 if (f->res.classid && 3708 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3709 goto nla_put_failure_locked; 3710 3711 key = &f->key; 3712 mask = &f->mask->key; 3713 skip_hw = tc_skip_hw(f->flags); 3714 3715 if (fl_dump_key(skb, net, key, mask)) 3716 goto nla_put_failure_locked; 3717 3718 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3719 goto nla_put_failure_locked; 3720 3721 spin_unlock(&tp->lock); 3722 3723 if (!skip_hw) 3724 fl_hw_update_stats(tp, f, rtnl_held); 3725 3726 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3727 goto nla_put_failure; 3728 3729 if (tcf_exts_dump(skb, &f->exts)) 3730 goto nla_put_failure; 3731 3732 nla_nest_end(skb, nest); 3733 3734 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3735 goto nla_put_failure; 3736 3737 return skb->len; 3738 3739 nla_put_failure_locked: 3740 spin_unlock(&tp->lock); 3741 nla_put_failure: 3742 nla_nest_cancel(skb, nest); 3743 return -1; 3744 } 3745 3746 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3747 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3748 { 3749 struct cls_fl_filter *f = fh; 3750 struct nlattr *nest; 3751 bool skip_hw; 3752 3753 if (!f) 3754 return skb->len; 3755 3756 t->tcm_handle = f->handle; 3757 3758 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3759 if (!nest) 3760 goto nla_put_failure; 3761 3762 spin_lock(&tp->lock); 3763 3764 skip_hw = tc_skip_hw(f->flags); 3765 3766 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3767 goto nla_put_failure_locked; 3768 3769 spin_unlock(&tp->lock); 3770 3771 if (!skip_hw) 3772 fl_hw_update_stats(tp, f, rtnl_held); 3773 3774 if (tcf_exts_terse_dump(skb, &f->exts)) 3775 goto nla_put_failure; 3776 3777 nla_nest_end(skb, nest); 3778 3779 return skb->len; 3780 3781 nla_put_failure_locked: 3782 spin_unlock(&tp->lock); 3783 nla_put_failure: 3784 nla_nest_cancel(skb, nest); 3785 return -1; 3786 } 3787 3788 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3789 { 3790 struct fl_flow_tmplt *tmplt = tmplt_priv; 3791 struct fl_flow_key *key, *mask; 3792 struct nlattr *nest; 3793 3794 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3795 if (!nest) 3796 goto nla_put_failure; 3797 3798 key = &tmplt->dummy_key; 3799 mask = &tmplt->mask; 3800 3801 if (fl_dump_key(skb, net, key, mask)) 3802 goto nla_put_failure; 3803 3804 nla_nest_end(skb, nest); 3805 3806 return skb->len; 3807 3808 nla_put_failure: 3809 nla_nest_cancel(skb, nest); 3810 return -EMSGSIZE; 3811 } 3812 3813 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3814 unsigned long base) 3815 { 3816 struct cls_fl_filter *f = fh; 3817 3818 tc_cls_bind_class(classid, cl, q, &f->res, base); 3819 } 3820 3821 static bool fl_delete_empty(struct tcf_proto *tp) 3822 { 3823 struct cls_fl_head *head = fl_head_dereference(tp); 3824 3825 spin_lock(&tp->lock); 3826 tp->deleting = idr_is_empty(&head->handle_idr); 3827 spin_unlock(&tp->lock); 3828 3829 return tp->deleting; 3830 } 3831 3832 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3833 .kind = "flower", 3834 .classify = fl_classify, 3835 .init = fl_init, 3836 .destroy = fl_destroy, 3837 .get = fl_get, 3838 .put = fl_put, 3839 .change = fl_change, 3840 .delete = fl_delete, 3841 .delete_empty = fl_delete_empty, 3842 .walk = fl_walk, 3843 .reoffload = fl_reoffload, 3844 .hw_add = fl_hw_add, 3845 .hw_del = fl_hw_del, 3846 .dump = fl_dump, 3847 .terse_dump = fl_terse_dump, 3848 .bind_class = fl_bind_class, 3849 .tmplt_create = fl_tmplt_create, 3850 .tmplt_destroy = fl_tmplt_destroy, 3851 .tmplt_reoffload = fl_tmplt_reoffload, 3852 .tmplt_dump = fl_tmplt_dump, 3853 .get_exts = fl_get_exts, 3854 .owner = THIS_MODULE, 3855 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3856 }; 3857 MODULE_ALIAS_NET_CLS("flower"); 3858 3859 static int __init cls_fl_init(void) 3860 { 3861 return register_tcf_proto_ops(&cls_fl_ops); 3862 } 3863 3864 static void __exit cls_fl_exit(void) 3865 { 3866 unregister_tcf_proto_ops(&cls_fl_ops); 3867 } 3868 3869 module_init(cls_fl_init); 3870 module_exit(cls_fl_exit); 3871 3872 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3873 MODULE_DESCRIPTION("Flower classifier"); 3874 MODULE_LICENSE("GPL v2"); 3875