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 memset(md, 0xff, sizeof(*md)); 1373 md->version = 1; 1374 1375 if (!depth) 1376 return sizeof(*md); 1377 1378 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1379 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1380 return -EINVAL; 1381 } 1382 1383 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1384 erspan_opt_policy, extack); 1385 if (err < 0) 1386 return err; 1387 1388 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1389 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1390 return -EINVAL; 1391 } 1392 1393 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1394 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1395 1396 if (md->version == 1) { 1397 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1398 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1399 return -EINVAL; 1400 } 1401 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1402 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1403 memset(&md->u, 0x00, sizeof(md->u)); 1404 md->u.index = nla_get_be32(nla); 1405 } 1406 } else if (md->version == 2) { 1407 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1408 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1409 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1410 return -EINVAL; 1411 } 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 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1417 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1418 set_hwid(&md->u.md2, nla_get_u8(nla)); 1419 } 1420 } else { 1421 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1422 return -EINVAL; 1423 } 1424 1425 return sizeof(*md); 1426 } 1427 1428 static int fl_set_gtp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1429 int depth, int option_len, 1430 struct netlink_ext_ack *extack) 1431 { 1432 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GTP_MAX + 1]; 1433 struct gtp_pdu_session_info *sinfo; 1434 u8 len = key->enc_opts.len; 1435 int err; 1436 1437 sinfo = (struct gtp_pdu_session_info *)&key->enc_opts.data[len]; 1438 memset(sinfo, 0xff, option_len); 1439 1440 if (!depth) 1441 return sizeof(*sinfo); 1442 1443 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GTP) { 1444 NL_SET_ERR_MSG_MOD(extack, "Non-gtp option type for mask"); 1445 return -EINVAL; 1446 } 1447 1448 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GTP_MAX, nla, 1449 gtp_opt_policy, extack); 1450 if (err < 0) 1451 return err; 1452 1453 if (!option_len && 1454 (!tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE] || 1455 !tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI])) { 1456 NL_SET_ERR_MSG_MOD(extack, 1457 "Missing tunnel key gtp option pdu type or qfi"); 1458 return -EINVAL; 1459 } 1460 1461 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]) 1462 sinfo->pdu_type = 1463 nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE]); 1464 1465 if (tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]) 1466 sinfo->qfi = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_GTP_QFI]); 1467 1468 return sizeof(*sinfo); 1469 } 1470 1471 static int fl_set_pfcp_opt(const struct nlattr *nla, struct fl_flow_key *key, 1472 int depth, int option_len, 1473 struct netlink_ext_ack *extack) 1474 { 1475 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX + 1]; 1476 struct pfcp_metadata *md; 1477 int err; 1478 1479 md = (struct pfcp_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1480 memset(md, 0xff, sizeof(*md)); 1481 1482 if (!depth) 1483 return sizeof(*md); 1484 1485 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_PFCP) { 1486 NL_SET_ERR_MSG_MOD(extack, "Non-pfcp option type for mask"); 1487 return -EINVAL; 1488 } 1489 1490 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_PFCP_MAX, nla, 1491 pfcp_opt_policy, extack); 1492 if (err < 0) 1493 return err; 1494 1495 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]) { 1496 NL_SET_ERR_MSG_MOD(extack, "Missing tunnel key pfcp option type"); 1497 return -EINVAL; 1498 } 1499 1500 if (tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]) 1501 md->type = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE]); 1502 1503 if (tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]) 1504 md->seid = nla_get_be64(tb[TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID]); 1505 1506 return sizeof(*md); 1507 } 1508 1509 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1510 struct fl_flow_key *mask, 1511 struct netlink_ext_ack *extack) 1512 { 1513 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1514 int err, option_len, key_depth, msk_depth = 0; 1515 1516 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1517 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1518 enc_opts_policy, extack); 1519 if (err) 1520 return err; 1521 1522 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1523 1524 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1525 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1526 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1527 enc_opts_policy, extack); 1528 if (err) 1529 return err; 1530 1531 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1532 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1533 if (!nla_ok(nla_opt_msk, msk_depth)) { 1534 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1535 return -EINVAL; 1536 } 1537 } 1538 1539 nla_for_each_attr(nla_opt_key, nla_enc_key, 1540 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1541 switch (nla_type(nla_opt_key)) { 1542 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1543 if (key->enc_opts.dst_opt_type && 1544 key->enc_opts.dst_opt_type != 1545 IP_TUNNEL_GENEVE_OPT_BIT) { 1546 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1547 return -EINVAL; 1548 } 1549 option_len = 0; 1550 key->enc_opts.dst_opt_type = IP_TUNNEL_GENEVE_OPT_BIT; 1551 option_len = fl_set_geneve_opt(nla_opt_key, key, 1552 key_depth, option_len, 1553 extack); 1554 if (option_len < 0) 1555 return option_len; 1556 1557 key->enc_opts.len += option_len; 1558 /* At the same time we need to parse through the mask 1559 * in order to verify exact and mask attribute lengths. 1560 */ 1561 mask->enc_opts.dst_opt_type = IP_TUNNEL_GENEVE_OPT_BIT; 1562 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1563 msk_depth, option_len, 1564 extack); 1565 if (option_len < 0) 1566 return option_len; 1567 1568 mask->enc_opts.len += option_len; 1569 if (key->enc_opts.len != mask->enc_opts.len) { 1570 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1571 return -EINVAL; 1572 } 1573 break; 1574 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1575 if (key->enc_opts.dst_opt_type) { 1576 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1577 return -EINVAL; 1578 } 1579 option_len = 0; 1580 key->enc_opts.dst_opt_type = IP_TUNNEL_VXLAN_OPT_BIT; 1581 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1582 key_depth, option_len, 1583 extack); 1584 if (option_len < 0) 1585 return option_len; 1586 1587 key->enc_opts.len += option_len; 1588 /* At the same time we need to parse through the mask 1589 * in order to verify exact and mask attribute lengths. 1590 */ 1591 mask->enc_opts.dst_opt_type = IP_TUNNEL_VXLAN_OPT_BIT; 1592 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1593 msk_depth, option_len, 1594 extack); 1595 if (option_len < 0) 1596 return option_len; 1597 1598 mask->enc_opts.len += option_len; 1599 if (key->enc_opts.len != mask->enc_opts.len) { 1600 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1601 return -EINVAL; 1602 } 1603 break; 1604 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1605 if (key->enc_opts.dst_opt_type) { 1606 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1607 return -EINVAL; 1608 } 1609 option_len = 0; 1610 key->enc_opts.dst_opt_type = IP_TUNNEL_ERSPAN_OPT_BIT; 1611 option_len = fl_set_erspan_opt(nla_opt_key, key, 1612 key_depth, option_len, 1613 extack); 1614 if (option_len < 0) 1615 return option_len; 1616 1617 key->enc_opts.len += option_len; 1618 /* At the same time we need to parse through the mask 1619 * in order to verify exact and mask attribute lengths. 1620 */ 1621 mask->enc_opts.dst_opt_type = IP_TUNNEL_ERSPAN_OPT_BIT; 1622 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1623 msk_depth, option_len, 1624 extack); 1625 if (option_len < 0) 1626 return option_len; 1627 1628 mask->enc_opts.len += option_len; 1629 if (key->enc_opts.len != mask->enc_opts.len) { 1630 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1631 return -EINVAL; 1632 } 1633 break; 1634 case TCA_FLOWER_KEY_ENC_OPTS_GTP: 1635 if (key->enc_opts.dst_opt_type) { 1636 NL_SET_ERR_MSG_MOD(extack, 1637 "Duplicate type for gtp options"); 1638 return -EINVAL; 1639 } 1640 option_len = 0; 1641 key->enc_opts.dst_opt_type = IP_TUNNEL_GTP_OPT_BIT; 1642 option_len = fl_set_gtp_opt(nla_opt_key, key, 1643 key_depth, option_len, 1644 extack); 1645 if (option_len < 0) 1646 return option_len; 1647 1648 key->enc_opts.len += option_len; 1649 /* At the same time we need to parse through the mask 1650 * in order to verify exact and mask attribute lengths. 1651 */ 1652 mask->enc_opts.dst_opt_type = IP_TUNNEL_GTP_OPT_BIT; 1653 option_len = fl_set_gtp_opt(nla_opt_msk, mask, 1654 msk_depth, option_len, 1655 extack); 1656 if (option_len < 0) 1657 return option_len; 1658 1659 mask->enc_opts.len += option_len; 1660 if (key->enc_opts.len != mask->enc_opts.len) { 1661 NL_SET_ERR_MSG_MOD(extack, 1662 "Key and mask miss aligned"); 1663 return -EINVAL; 1664 } 1665 break; 1666 case TCA_FLOWER_KEY_ENC_OPTS_PFCP: 1667 if (key->enc_opts.dst_opt_type) { 1668 NL_SET_ERR_MSG_MOD(extack, "Duplicate type for pfcp options"); 1669 return -EINVAL; 1670 } 1671 option_len = 0; 1672 key->enc_opts.dst_opt_type = IP_TUNNEL_PFCP_OPT_BIT; 1673 option_len = fl_set_pfcp_opt(nla_opt_key, key, 1674 key_depth, option_len, 1675 extack); 1676 if (option_len < 0) 1677 return option_len; 1678 1679 key->enc_opts.len += option_len; 1680 /* At the same time we need to parse through the mask 1681 * in order to verify exact and mask attribute lengths. 1682 */ 1683 mask->enc_opts.dst_opt_type = IP_TUNNEL_PFCP_OPT_BIT; 1684 option_len = fl_set_pfcp_opt(nla_opt_msk, mask, 1685 msk_depth, option_len, 1686 extack); 1687 if (option_len < 0) 1688 return option_len; 1689 1690 mask->enc_opts.len += option_len; 1691 if (key->enc_opts.len != mask->enc_opts.len) { 1692 NL_SET_ERR_MSG_MOD(extack, "Key and mask miss aligned"); 1693 return -EINVAL; 1694 } 1695 break; 1696 default: 1697 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1698 return -EINVAL; 1699 } 1700 1701 if (!msk_depth) 1702 continue; 1703 1704 if (!nla_ok(nla_opt_msk, msk_depth)) { 1705 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1706 return -EINVAL; 1707 } 1708 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1709 } 1710 1711 return 0; 1712 } 1713 1714 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1715 struct netlink_ext_ack *extack) 1716 { 1717 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1718 NL_SET_ERR_MSG_ATTR(extack, tb, 1719 "no trk, so no other flag can be set"); 1720 return -EINVAL; 1721 } 1722 1723 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1724 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1725 NL_SET_ERR_MSG_ATTR(extack, tb, 1726 "new and est are mutually exclusive"); 1727 return -EINVAL; 1728 } 1729 1730 if (state & TCA_FLOWER_KEY_CT_FLAGS_INVALID && 1731 state & ~(TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 1732 TCA_FLOWER_KEY_CT_FLAGS_INVALID)) { 1733 NL_SET_ERR_MSG_ATTR(extack, tb, 1734 "when inv is set, only trk may be set"); 1735 return -EINVAL; 1736 } 1737 1738 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1739 state & TCA_FLOWER_KEY_CT_FLAGS_REPLY) { 1740 NL_SET_ERR_MSG_ATTR(extack, tb, 1741 "new and rpl are mutually exclusive"); 1742 return -EINVAL; 1743 } 1744 1745 return 0; 1746 } 1747 1748 static int fl_set_key_ct(struct nlattr **tb, 1749 struct flow_dissector_key_ct *key, 1750 struct flow_dissector_key_ct *mask, 1751 struct netlink_ext_ack *extack) 1752 { 1753 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1754 int err; 1755 1756 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1757 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1758 return -EOPNOTSUPP; 1759 } 1760 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1761 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1762 sizeof(key->ct_state)); 1763 1764 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1765 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1766 extack); 1767 if (err) 1768 return err; 1769 1770 } 1771 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1772 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1773 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1774 return -EOPNOTSUPP; 1775 } 1776 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1777 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1778 sizeof(key->ct_zone)); 1779 } 1780 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1781 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1782 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1783 return -EOPNOTSUPP; 1784 } 1785 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1786 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1787 sizeof(key->ct_mark)); 1788 } 1789 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1790 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1791 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1792 return -EOPNOTSUPP; 1793 } 1794 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1795 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1796 sizeof(key->ct_labels)); 1797 } 1798 1799 return 0; 1800 } 1801 1802 static bool is_vlan_key(struct nlattr *tb, __be16 *ethertype, 1803 struct fl_flow_key *key, struct fl_flow_key *mask, 1804 int vthresh) 1805 { 1806 const bool good_num_of_vlans = key->num_of_vlans.num_of_vlans > vthresh; 1807 1808 if (!tb) { 1809 *ethertype = 0; 1810 return good_num_of_vlans; 1811 } 1812 1813 *ethertype = nla_get_be16(tb); 1814 if (good_num_of_vlans || eth_type_vlan(*ethertype)) 1815 return true; 1816 1817 key->basic.n_proto = *ethertype; 1818 mask->basic.n_proto = cpu_to_be16(~0); 1819 return false; 1820 } 1821 1822 static void fl_set_key_cfm_md_level(struct nlattr **tb, 1823 struct fl_flow_key *key, 1824 struct fl_flow_key *mask, 1825 struct netlink_ext_ack *extack) 1826 { 1827 u8 level; 1828 1829 if (!tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]) 1830 return; 1831 1832 level = nla_get_u8(tb[TCA_FLOWER_KEY_CFM_MD_LEVEL]); 1833 key->cfm.mdl_ver = FIELD_PREP(FLOW_DIS_CFM_MDL_MASK, level); 1834 mask->cfm.mdl_ver = FLOW_DIS_CFM_MDL_MASK; 1835 } 1836 1837 static void fl_set_key_cfm_opcode(struct nlattr **tb, 1838 struct fl_flow_key *key, 1839 struct fl_flow_key *mask, 1840 struct netlink_ext_ack *extack) 1841 { 1842 fl_set_key_val(tb, &key->cfm.opcode, TCA_FLOWER_KEY_CFM_OPCODE, 1843 &mask->cfm.opcode, TCA_FLOWER_UNSPEC, 1844 sizeof(key->cfm.opcode)); 1845 } 1846 1847 static int fl_set_key_cfm(struct nlattr **tb, 1848 struct fl_flow_key *key, 1849 struct fl_flow_key *mask, 1850 struct netlink_ext_ack *extack) 1851 { 1852 struct nlattr *nla_cfm_opt[TCA_FLOWER_KEY_CFM_OPT_MAX + 1]; 1853 int err; 1854 1855 if (!tb[TCA_FLOWER_KEY_CFM]) 1856 return 0; 1857 1858 err = nla_parse_nested(nla_cfm_opt, TCA_FLOWER_KEY_CFM_OPT_MAX, 1859 tb[TCA_FLOWER_KEY_CFM], cfm_opt_policy, extack); 1860 if (err < 0) 1861 return err; 1862 1863 fl_set_key_cfm_opcode(nla_cfm_opt, key, mask, extack); 1864 fl_set_key_cfm_md_level(nla_cfm_opt, key, mask, extack); 1865 1866 return 0; 1867 } 1868 1869 static int fl_set_key(struct net *net, struct nlattr *tca_opts, 1870 struct nlattr **tb, struct fl_flow_key *key, 1871 struct fl_flow_key *mask, struct netlink_ext_ack *extack) 1872 { 1873 __be16 ethertype; 1874 int ret = 0; 1875 1876 if (tb[TCA_FLOWER_INDEV]) { 1877 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1878 if (err < 0) 1879 return err; 1880 key->meta.ingress_ifindex = err; 1881 mask->meta.ingress_ifindex = 0xffffffff; 1882 } 1883 1884 fl_set_key_val(tb, &key->meta.l2_miss, TCA_FLOWER_L2_MISS, 1885 &mask->meta.l2_miss, TCA_FLOWER_UNSPEC, 1886 sizeof(key->meta.l2_miss)); 1887 1888 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1889 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1890 sizeof(key->eth.dst)); 1891 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1892 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1893 sizeof(key->eth.src)); 1894 fl_set_key_val(tb, &key->num_of_vlans, 1895 TCA_FLOWER_KEY_NUM_OF_VLANS, 1896 &mask->num_of_vlans, 1897 TCA_FLOWER_UNSPEC, 1898 sizeof(key->num_of_vlans)); 1899 1900 if (is_vlan_key(tb[TCA_FLOWER_KEY_ETH_TYPE], ðertype, key, mask, 0)) { 1901 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1902 TCA_FLOWER_KEY_VLAN_PRIO, 1903 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1904 &key->vlan, &mask->vlan); 1905 1906 if (is_vlan_key(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE], 1907 ðertype, key, mask, 1)) { 1908 fl_set_key_vlan(tb, ethertype, 1909 TCA_FLOWER_KEY_CVLAN_ID, 1910 TCA_FLOWER_KEY_CVLAN_PRIO, 1911 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1912 &key->cvlan, &mask->cvlan); 1913 fl_set_key_val(tb, &key->basic.n_proto, 1914 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1915 &mask->basic.n_proto, 1916 TCA_FLOWER_UNSPEC, 1917 sizeof(key->basic.n_proto)); 1918 } 1919 } 1920 1921 if (key->basic.n_proto == htons(ETH_P_PPP_SES)) 1922 fl_set_key_pppoe(tb, &key->pppoe, &mask->pppoe, key, mask); 1923 1924 if (key->basic.n_proto == htons(ETH_P_IP) || 1925 key->basic.n_proto == htons(ETH_P_IPV6)) { 1926 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1927 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1928 sizeof(key->basic.ip_proto)); 1929 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1930 } 1931 1932 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1933 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1934 mask->control.addr_type = ~0; 1935 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1936 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1937 sizeof(key->ipv4.src)); 1938 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1939 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1940 sizeof(key->ipv4.dst)); 1941 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1942 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1943 mask->control.addr_type = ~0; 1944 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1945 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1946 sizeof(key->ipv6.src)); 1947 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1948 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1949 sizeof(key->ipv6.dst)); 1950 } 1951 1952 if (key->basic.ip_proto == IPPROTO_TCP) { 1953 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1954 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1955 sizeof(key->tp.src)); 1956 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1957 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1958 sizeof(key->tp.dst)); 1959 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1960 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1961 sizeof(key->tcp.flags)); 1962 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1963 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1964 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1965 sizeof(key->tp.src)); 1966 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1967 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1968 sizeof(key->tp.dst)); 1969 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1970 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1971 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1972 sizeof(key->tp.src)); 1973 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1974 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1975 sizeof(key->tp.dst)); 1976 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1977 key->basic.ip_proto == IPPROTO_ICMP) { 1978 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1979 &mask->icmp.type, 1980 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1981 sizeof(key->icmp.type)); 1982 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1983 &mask->icmp.code, 1984 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1985 sizeof(key->icmp.code)); 1986 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1987 key->basic.ip_proto == IPPROTO_ICMPV6) { 1988 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1989 &mask->icmp.type, 1990 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1991 sizeof(key->icmp.type)); 1992 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1993 &mask->icmp.code, 1994 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1995 sizeof(key->icmp.code)); 1996 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1997 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1998 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1999 if (ret) 2000 return ret; 2001 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 2002 key->basic.n_proto == htons(ETH_P_RARP)) { 2003 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 2004 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 2005 sizeof(key->arp.sip)); 2006 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 2007 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 2008 sizeof(key->arp.tip)); 2009 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 2010 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 2011 sizeof(key->arp.op)); 2012 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2013 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2014 sizeof(key->arp.sha)); 2015 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2016 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2017 sizeof(key->arp.tha)); 2018 } else if (key->basic.ip_proto == IPPROTO_L2TP) { 2019 fl_set_key_val(tb, &key->l2tpv3.session_id, 2020 TCA_FLOWER_KEY_L2TPV3_SID, 2021 &mask->l2tpv3.session_id, TCA_FLOWER_UNSPEC, 2022 sizeof(key->l2tpv3.session_id)); 2023 } else if (key->basic.n_proto == htons(ETH_P_CFM)) { 2024 ret = fl_set_key_cfm(tb, key, mask, extack); 2025 if (ret) 2026 return ret; 2027 } 2028 2029 if (key->basic.ip_proto == IPPROTO_TCP || 2030 key->basic.ip_proto == IPPROTO_UDP || 2031 key->basic.ip_proto == IPPROTO_SCTP) { 2032 ret = fl_set_key_port_range(tb, key, mask, extack); 2033 if (ret) 2034 return ret; 2035 } 2036 2037 if (tb[TCA_FLOWER_KEY_SPI]) { 2038 ret = fl_set_key_spi(tb, key, mask, extack); 2039 if (ret) 2040 return ret; 2041 } 2042 2043 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 2044 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 2045 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 2046 mask->enc_control.addr_type = ~0; 2047 fl_set_key_val(tb, &key->enc_ipv4.src, 2048 TCA_FLOWER_KEY_ENC_IPV4_SRC, 2049 &mask->enc_ipv4.src, 2050 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2051 sizeof(key->enc_ipv4.src)); 2052 fl_set_key_val(tb, &key->enc_ipv4.dst, 2053 TCA_FLOWER_KEY_ENC_IPV4_DST, 2054 &mask->enc_ipv4.dst, 2055 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2056 sizeof(key->enc_ipv4.dst)); 2057 } 2058 2059 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 2060 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 2061 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 2062 mask->enc_control.addr_type = ~0; 2063 fl_set_key_val(tb, &key->enc_ipv6.src, 2064 TCA_FLOWER_KEY_ENC_IPV6_SRC, 2065 &mask->enc_ipv6.src, 2066 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2067 sizeof(key->enc_ipv6.src)); 2068 fl_set_key_val(tb, &key->enc_ipv6.dst, 2069 TCA_FLOWER_KEY_ENC_IPV6_DST, 2070 &mask->enc_ipv6.dst, 2071 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2072 sizeof(key->enc_ipv6.dst)); 2073 } 2074 2075 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 2076 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 2077 sizeof(key->enc_key_id.keyid)); 2078 2079 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2080 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2081 sizeof(key->enc_tp.src)); 2082 2083 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2084 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2085 sizeof(key->enc_tp.dst)); 2086 2087 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 2088 2089 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 2090 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 2091 sizeof(key->hash.hash)); 2092 2093 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 2094 ret = fl_set_enc_opt(tb, key, mask, extack); 2095 if (ret) 2096 return ret; 2097 } 2098 2099 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 2100 if (ret) 2101 return ret; 2102 2103 if (tb[TCA_FLOWER_KEY_FLAGS]) { 2104 ret = fl_set_key_flags(tca_opts, tb, false, 2105 &key->control.flags, 2106 &mask->control.flags, extack); 2107 if (ret) 2108 return ret; 2109 } 2110 2111 if (tb[TCA_FLOWER_KEY_ENC_FLAGS]) 2112 ret = fl_set_key_flags(tca_opts, tb, true, 2113 &key->enc_control.flags, 2114 &mask->enc_control.flags, extack); 2115 2116 return ret; 2117 } 2118 2119 static void fl_mask_copy(struct fl_flow_mask *dst, 2120 struct fl_flow_mask *src) 2121 { 2122 const void *psrc = fl_key_get_start(&src->key, src); 2123 void *pdst = fl_key_get_start(&dst->key, src); 2124 2125 memcpy(pdst, psrc, fl_mask_range(src)); 2126 dst->range = src->range; 2127 } 2128 2129 static const struct rhashtable_params fl_ht_params = { 2130 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 2131 .head_offset = offsetof(struct cls_fl_filter, ht_node), 2132 .automatic_shrinking = true, 2133 }; 2134 2135 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 2136 { 2137 mask->filter_ht_params = fl_ht_params; 2138 mask->filter_ht_params.key_len = fl_mask_range(mask); 2139 mask->filter_ht_params.key_offset += mask->range.start; 2140 2141 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 2142 } 2143 2144 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 2145 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 2146 2147 #define FL_KEY_IS_MASKED(mask, member) \ 2148 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 2149 0, FL_KEY_MEMBER_SIZE(member)) \ 2150 2151 #define FL_KEY_SET(keys, cnt, id, member) \ 2152 do { \ 2153 keys[cnt].key_id = id; \ 2154 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 2155 cnt++; \ 2156 } while(0); 2157 2158 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 2159 do { \ 2160 if (FL_KEY_IS_MASKED(mask, member)) \ 2161 FL_KEY_SET(keys, cnt, id, member); \ 2162 } while(0); 2163 2164 static void fl_init_dissector(struct flow_dissector *dissector, 2165 struct fl_flow_key *mask) 2166 { 2167 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 2168 size_t cnt = 0; 2169 2170 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2171 FLOW_DISSECTOR_KEY_META, meta); 2172 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 2173 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 2174 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2175 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 2176 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2177 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 2178 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2179 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 2180 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2181 FLOW_DISSECTOR_KEY_PORTS, tp); 2182 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2183 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 2184 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2185 FLOW_DISSECTOR_KEY_IP, ip); 2186 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2187 FLOW_DISSECTOR_KEY_TCP, tcp); 2188 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2189 FLOW_DISSECTOR_KEY_ICMP, icmp); 2190 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2191 FLOW_DISSECTOR_KEY_ARP, arp); 2192 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2193 FLOW_DISSECTOR_KEY_MPLS, mpls); 2194 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2195 FLOW_DISSECTOR_KEY_VLAN, vlan); 2196 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2197 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 2198 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2199 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 2200 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2201 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 2202 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2203 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 2204 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 2205 FL_KEY_IS_MASKED(mask, enc_ipv6) || 2206 FL_KEY_IS_MASKED(mask, enc_control)) 2207 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 2208 enc_control); 2209 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2210 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 2211 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2212 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 2213 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2214 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 2215 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2216 FLOW_DISSECTOR_KEY_CT, ct); 2217 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2218 FLOW_DISSECTOR_KEY_HASH, hash); 2219 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2220 FLOW_DISSECTOR_KEY_NUM_OF_VLANS, num_of_vlans); 2221 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2222 FLOW_DISSECTOR_KEY_PPPOE, pppoe); 2223 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2224 FLOW_DISSECTOR_KEY_L2TPV3, l2tpv3); 2225 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2226 FLOW_DISSECTOR_KEY_IPSEC, ipsec); 2227 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 2228 FLOW_DISSECTOR_KEY_CFM, cfm); 2229 2230 skb_flow_dissector_init(dissector, keys, cnt); 2231 } 2232 2233 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 2234 struct fl_flow_mask *mask) 2235 { 2236 struct fl_flow_mask *newmask; 2237 int err; 2238 2239 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 2240 if (!newmask) 2241 return ERR_PTR(-ENOMEM); 2242 2243 fl_mask_copy(newmask, mask); 2244 2245 if ((newmask->key.tp_range.tp_min.dst && 2246 newmask->key.tp_range.tp_max.dst) || 2247 (newmask->key.tp_range.tp_min.src && 2248 newmask->key.tp_range.tp_max.src)) 2249 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 2250 2251 err = fl_init_mask_hashtable(newmask); 2252 if (err) 2253 goto errout_free; 2254 2255 fl_init_dissector(&newmask->dissector, &newmask->key); 2256 2257 INIT_LIST_HEAD_RCU(&newmask->filters); 2258 2259 refcount_set(&newmask->refcnt, 1); 2260 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 2261 &newmask->ht_node, mask_ht_params); 2262 if (err) 2263 goto errout_destroy; 2264 2265 spin_lock(&head->masks_lock); 2266 list_add_tail_rcu(&newmask->list, &head->masks); 2267 spin_unlock(&head->masks_lock); 2268 2269 return newmask; 2270 2271 errout_destroy: 2272 rhashtable_destroy(&newmask->ht); 2273 errout_free: 2274 kfree(newmask); 2275 2276 return ERR_PTR(err); 2277 } 2278 2279 static int fl_check_assign_mask(struct cls_fl_head *head, 2280 struct cls_fl_filter *fnew, 2281 struct cls_fl_filter *fold, 2282 struct fl_flow_mask *mask) 2283 { 2284 struct fl_flow_mask *newmask; 2285 int ret = 0; 2286 2287 rcu_read_lock(); 2288 2289 /* Insert mask as temporary node to prevent concurrent creation of mask 2290 * with same key. Any concurrent lookups with same key will return 2291 * -EAGAIN because mask's refcnt is zero. 2292 */ 2293 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 2294 &mask->ht_node, 2295 mask_ht_params); 2296 if (!fnew->mask) { 2297 rcu_read_unlock(); 2298 2299 if (fold) { 2300 ret = -EINVAL; 2301 goto errout_cleanup; 2302 } 2303 2304 newmask = fl_create_new_mask(head, mask); 2305 if (IS_ERR(newmask)) { 2306 ret = PTR_ERR(newmask); 2307 goto errout_cleanup; 2308 } 2309 2310 fnew->mask = newmask; 2311 return 0; 2312 } else if (IS_ERR(fnew->mask)) { 2313 ret = PTR_ERR(fnew->mask); 2314 } else if (fold && fold->mask != fnew->mask) { 2315 ret = -EINVAL; 2316 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 2317 /* Mask was deleted concurrently, try again */ 2318 ret = -EAGAIN; 2319 } 2320 rcu_read_unlock(); 2321 return ret; 2322 2323 errout_cleanup: 2324 rhashtable_remove_fast(&head->ht, &mask->ht_node, 2325 mask_ht_params); 2326 return ret; 2327 } 2328 2329 static bool fl_needs_tc_skb_ext(const struct fl_flow_key *mask) 2330 { 2331 return mask->meta.l2_miss; 2332 } 2333 2334 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 2335 struct cls_fl_filter *fold, 2336 bool *in_ht) 2337 { 2338 struct fl_flow_mask *mask = fnew->mask; 2339 int err; 2340 2341 err = rhashtable_lookup_insert_fast(&mask->ht, 2342 &fnew->ht_node, 2343 mask->filter_ht_params); 2344 if (err) { 2345 *in_ht = false; 2346 /* It is okay if filter with same key exists when 2347 * overwriting. 2348 */ 2349 return fold && err == -EEXIST ? 0 : err; 2350 } 2351 2352 *in_ht = true; 2353 return 0; 2354 } 2355 2356 static int fl_change(struct net *net, struct sk_buff *in_skb, 2357 struct tcf_proto *tp, unsigned long base, 2358 u32 handle, struct nlattr **tca, 2359 void **arg, u32 flags, 2360 struct netlink_ext_ack *extack) 2361 { 2362 struct cls_fl_head *head = fl_head_dereference(tp); 2363 bool rtnl_held = !(flags & TCA_ACT_FLAGS_NO_RTNL); 2364 struct nlattr *tca_opts = tca[TCA_OPTIONS]; 2365 struct cls_fl_filter *fold = *arg; 2366 bool bound_to_filter = false; 2367 struct cls_fl_filter *fnew; 2368 struct fl_flow_mask *mask; 2369 struct nlattr **tb; 2370 bool in_ht; 2371 int err; 2372 2373 if (!tca_opts) { 2374 err = -EINVAL; 2375 goto errout_fold; 2376 } 2377 2378 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 2379 if (!mask) { 2380 err = -ENOBUFS; 2381 goto errout_fold; 2382 } 2383 2384 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2385 if (!tb) { 2386 err = -ENOBUFS; 2387 goto errout_mask_alloc; 2388 } 2389 2390 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2391 tca_opts, fl_policy, NULL); 2392 if (err < 0) 2393 goto errout_tb; 2394 2395 if (fold && handle && fold->handle != handle) { 2396 err = -EINVAL; 2397 goto errout_tb; 2398 } 2399 2400 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2401 if (!fnew) { 2402 err = -ENOBUFS; 2403 goto errout_tb; 2404 } 2405 INIT_LIST_HEAD(&fnew->hw_list); 2406 refcount_set(&fnew->refcnt, 1); 2407 2408 if (tb[TCA_FLOWER_FLAGS]) { 2409 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2410 2411 if (!tc_flags_valid(fnew->flags)) { 2412 kfree(fnew); 2413 err = -EINVAL; 2414 goto errout_tb; 2415 } 2416 } 2417 2418 if (!fold) { 2419 spin_lock(&tp->lock); 2420 if (!handle) { 2421 handle = 1; 2422 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2423 INT_MAX, GFP_ATOMIC); 2424 } else { 2425 err = idr_alloc_u32(&head->handle_idr, NULL, &handle, 2426 handle, GFP_ATOMIC); 2427 2428 /* Filter with specified handle was concurrently 2429 * inserted after initial check in cls_api. This is not 2430 * necessarily an error if NLM_F_EXCL is not set in 2431 * message flags. Returning EAGAIN will cause cls_api to 2432 * try to update concurrently inserted rule. 2433 */ 2434 if (err == -ENOSPC) 2435 err = -EAGAIN; 2436 } 2437 spin_unlock(&tp->lock); 2438 2439 if (err) { 2440 kfree(fnew); 2441 goto errout_tb; 2442 } 2443 } 2444 fnew->handle = handle; 2445 2446 err = tcf_exts_init_ex(&fnew->exts, net, TCA_FLOWER_ACT, 0, tp, handle, 2447 !tc_skip_hw(fnew->flags)); 2448 if (err < 0) 2449 goto errout_idr; 2450 2451 err = tcf_exts_validate_ex(net, tp, tb, tca[TCA_RATE], 2452 &fnew->exts, flags, fnew->flags, 2453 extack); 2454 if (err < 0) 2455 goto errout_idr; 2456 2457 if (tb[TCA_FLOWER_CLASSID]) { 2458 fnew->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 2459 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2460 rtnl_lock(); 2461 tcf_bind_filter(tp, &fnew->res, base); 2462 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2463 rtnl_unlock(); 2464 bound_to_filter = true; 2465 } 2466 2467 err = fl_set_key(net, tca_opts, tb, &fnew->key, &mask->key, extack); 2468 if (err) 2469 goto unbind_filter; 2470 2471 fl_mask_update_range(mask); 2472 fl_set_masked_key(&fnew->mkey, &fnew->key, mask); 2473 2474 if (!fl_mask_fits_tmplt(tp->chain->tmplt_priv, mask)) { 2475 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 2476 err = -EINVAL; 2477 goto unbind_filter; 2478 } 2479 2480 /* Enable tc skb extension if filter matches on data extracted from 2481 * this extension. 2482 */ 2483 if (fl_needs_tc_skb_ext(&mask->key)) { 2484 fnew->needs_tc_skb_ext = 1; 2485 tc_skb_ext_tc_enable(); 2486 } 2487 2488 err = fl_check_assign_mask(head, fnew, fold, mask); 2489 if (err) 2490 goto unbind_filter; 2491 2492 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2493 if (err) 2494 goto errout_mask; 2495 2496 if (!tc_skip_hw(fnew->flags)) { 2497 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2498 if (err) 2499 goto errout_ht; 2500 } 2501 2502 if (!tc_in_hw(fnew->flags)) 2503 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2504 2505 spin_lock(&tp->lock); 2506 2507 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2508 * proto again or create new one, if necessary. 2509 */ 2510 if (tp->deleting) { 2511 err = -EAGAIN; 2512 goto errout_hw; 2513 } 2514 2515 if (fold) { 2516 /* Fold filter was deleted concurrently. Retry lookup. */ 2517 if (fold->deleted) { 2518 err = -EAGAIN; 2519 goto errout_hw; 2520 } 2521 2522 fnew->handle = handle; 2523 2524 if (!in_ht) { 2525 struct rhashtable_params params = 2526 fnew->mask->filter_ht_params; 2527 2528 err = rhashtable_insert_fast(&fnew->mask->ht, 2529 &fnew->ht_node, 2530 params); 2531 if (err) 2532 goto errout_hw; 2533 in_ht = true; 2534 } 2535 2536 refcount_inc(&fnew->refcnt); 2537 rhashtable_remove_fast(&fold->mask->ht, 2538 &fold->ht_node, 2539 fold->mask->filter_ht_params); 2540 idr_replace(&head->handle_idr, fnew, fnew->handle); 2541 list_replace_rcu(&fold->list, &fnew->list); 2542 fold->deleted = true; 2543 2544 spin_unlock(&tp->lock); 2545 2546 fl_mask_put(head, fold->mask); 2547 if (!tc_skip_hw(fold->flags)) 2548 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2549 tcf_unbind_filter(tp, &fold->res); 2550 /* Caller holds reference to fold, so refcnt is always > 0 2551 * after this. 2552 */ 2553 refcount_dec(&fold->refcnt); 2554 __fl_put(fold); 2555 } else { 2556 idr_replace(&head->handle_idr, fnew, fnew->handle); 2557 2558 refcount_inc(&fnew->refcnt); 2559 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2560 spin_unlock(&tp->lock); 2561 } 2562 2563 *arg = fnew; 2564 2565 kfree(tb); 2566 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2567 return 0; 2568 2569 errout_ht: 2570 spin_lock(&tp->lock); 2571 errout_hw: 2572 fnew->deleted = true; 2573 spin_unlock(&tp->lock); 2574 if (!tc_skip_hw(fnew->flags)) 2575 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2576 if (in_ht) 2577 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2578 fnew->mask->filter_ht_params); 2579 errout_mask: 2580 fl_mask_put(head, fnew->mask); 2581 2582 unbind_filter: 2583 if (bound_to_filter) { 2584 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2585 rtnl_lock(); 2586 tcf_unbind_filter(tp, &fnew->res); 2587 if (flags & TCA_ACT_FLAGS_NO_RTNL) 2588 rtnl_unlock(); 2589 } 2590 2591 errout_idr: 2592 if (!fold) { 2593 spin_lock(&tp->lock); 2594 idr_remove(&head->handle_idr, fnew->handle); 2595 spin_unlock(&tp->lock); 2596 } 2597 __fl_put(fnew); 2598 errout_tb: 2599 kfree(tb); 2600 errout_mask_alloc: 2601 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2602 errout_fold: 2603 if (fold) 2604 __fl_put(fold); 2605 return err; 2606 } 2607 2608 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2609 bool rtnl_held, struct netlink_ext_ack *extack) 2610 { 2611 struct cls_fl_head *head = fl_head_dereference(tp); 2612 struct cls_fl_filter *f = arg; 2613 bool last_on_mask; 2614 int err = 0; 2615 2616 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2617 *last = list_empty(&head->masks); 2618 __fl_put(f); 2619 2620 return err; 2621 } 2622 2623 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2624 bool rtnl_held) 2625 { 2626 struct cls_fl_head *head = fl_head_dereference(tp); 2627 unsigned long id = arg->cookie, tmp; 2628 struct cls_fl_filter *f; 2629 2630 arg->count = arg->skip; 2631 2632 rcu_read_lock(); 2633 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2634 /* don't return filters that are being deleted */ 2635 if (!f || !refcount_inc_not_zero(&f->refcnt)) 2636 continue; 2637 rcu_read_unlock(); 2638 2639 if (arg->fn(tp, f, arg) < 0) { 2640 __fl_put(f); 2641 arg->stop = 1; 2642 rcu_read_lock(); 2643 break; 2644 } 2645 __fl_put(f); 2646 arg->count++; 2647 rcu_read_lock(); 2648 } 2649 rcu_read_unlock(); 2650 arg->cookie = id; 2651 } 2652 2653 static struct cls_fl_filter * 2654 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2655 { 2656 struct cls_fl_head *head = fl_head_dereference(tp); 2657 2658 spin_lock(&tp->lock); 2659 if (list_empty(&head->hw_filters)) { 2660 spin_unlock(&tp->lock); 2661 return NULL; 2662 } 2663 2664 if (!f) 2665 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2666 hw_list); 2667 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2668 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2669 spin_unlock(&tp->lock); 2670 return f; 2671 } 2672 } 2673 2674 spin_unlock(&tp->lock); 2675 return NULL; 2676 } 2677 2678 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2679 void *cb_priv, struct netlink_ext_ack *extack) 2680 { 2681 struct tcf_block *block = tp->chain->block; 2682 struct flow_cls_offload cls_flower = {}; 2683 struct cls_fl_filter *f = NULL; 2684 int err; 2685 2686 /* hw_filters list can only be changed by hw offload functions after 2687 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2688 * iterating it. 2689 */ 2690 ASSERT_RTNL(); 2691 2692 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2693 cls_flower.rule = 2694 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2695 if (!cls_flower.rule) { 2696 __fl_put(f); 2697 return -ENOMEM; 2698 } 2699 2700 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2701 extack); 2702 cls_flower.command = add ? 2703 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2704 cls_flower.cookie = (unsigned long)f; 2705 cls_flower.rule->match.dissector = &f->mask->dissector; 2706 cls_flower.rule->match.mask = &f->mask->key; 2707 cls_flower.rule->match.key = &f->mkey; 2708 2709 err = tc_setup_offload_action(&cls_flower.rule->action, &f->exts, 2710 cls_flower.common.extack); 2711 if (err) { 2712 kfree(cls_flower.rule); 2713 if (tc_skip_sw(f->flags)) { 2714 __fl_put(f); 2715 return err; 2716 } 2717 goto next_flow; 2718 } 2719 2720 cls_flower.classid = f->res.classid; 2721 2722 err = tc_setup_cb_reoffload(block, tp, add, cb, 2723 TC_SETUP_CLSFLOWER, &cls_flower, 2724 cb_priv, &f->flags, 2725 &f->in_hw_count); 2726 tc_cleanup_offload_action(&cls_flower.rule->action); 2727 kfree(cls_flower.rule); 2728 2729 if (err) { 2730 __fl_put(f); 2731 return err; 2732 } 2733 next_flow: 2734 __fl_put(f); 2735 } 2736 2737 return 0; 2738 } 2739 2740 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2741 { 2742 struct flow_cls_offload *cls_flower = type_data; 2743 struct cls_fl_filter *f = 2744 (struct cls_fl_filter *) cls_flower->cookie; 2745 struct cls_fl_head *head = fl_head_dereference(tp); 2746 2747 spin_lock(&tp->lock); 2748 list_add(&f->hw_list, &head->hw_filters); 2749 spin_unlock(&tp->lock); 2750 } 2751 2752 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2753 { 2754 struct flow_cls_offload *cls_flower = type_data; 2755 struct cls_fl_filter *f = 2756 (struct cls_fl_filter *) cls_flower->cookie; 2757 2758 spin_lock(&tp->lock); 2759 if (!list_empty(&f->hw_list)) 2760 list_del_init(&f->hw_list); 2761 spin_unlock(&tp->lock); 2762 } 2763 2764 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2765 struct fl_flow_tmplt *tmplt) 2766 { 2767 struct flow_cls_offload cls_flower = {}; 2768 struct tcf_block *block = chain->block; 2769 2770 cls_flower.rule = flow_rule_alloc(0); 2771 if (!cls_flower.rule) 2772 return -ENOMEM; 2773 2774 cls_flower.common.chain_index = chain->index; 2775 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2776 cls_flower.cookie = (unsigned long) tmplt; 2777 cls_flower.rule->match.dissector = &tmplt->dissector; 2778 cls_flower.rule->match.mask = &tmplt->mask; 2779 cls_flower.rule->match.key = &tmplt->dummy_key; 2780 2781 /* We don't care if driver (any of them) fails to handle this 2782 * call. It serves just as a hint for it. 2783 */ 2784 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2785 kfree(cls_flower.rule); 2786 2787 return 0; 2788 } 2789 2790 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2791 struct fl_flow_tmplt *tmplt) 2792 { 2793 struct flow_cls_offload cls_flower = {}; 2794 struct tcf_block *block = chain->block; 2795 2796 cls_flower.common.chain_index = chain->index; 2797 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2798 cls_flower.cookie = (unsigned long) tmplt; 2799 2800 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2801 } 2802 2803 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2804 struct nlattr **tca, 2805 struct netlink_ext_ack *extack) 2806 { 2807 struct nlattr *tca_opts = tca[TCA_OPTIONS]; 2808 struct fl_flow_tmplt *tmplt; 2809 struct nlattr **tb; 2810 int err; 2811 2812 if (!tca_opts) 2813 return ERR_PTR(-EINVAL); 2814 2815 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2816 if (!tb) 2817 return ERR_PTR(-ENOBUFS); 2818 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2819 tca_opts, fl_policy, NULL); 2820 if (err) 2821 goto errout_tb; 2822 2823 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2824 if (!tmplt) { 2825 err = -ENOMEM; 2826 goto errout_tb; 2827 } 2828 tmplt->chain = chain; 2829 err = fl_set_key(net, tca_opts, tb, &tmplt->dummy_key, 2830 &tmplt->mask, extack); 2831 if (err) 2832 goto errout_tmplt; 2833 2834 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2835 2836 err = fl_hw_create_tmplt(chain, tmplt); 2837 if (err) 2838 goto errout_tmplt; 2839 2840 kfree(tb); 2841 return tmplt; 2842 2843 errout_tmplt: 2844 kfree(tmplt); 2845 errout_tb: 2846 kfree(tb); 2847 return ERR_PTR(err); 2848 } 2849 2850 static void fl_tmplt_destroy(void *tmplt_priv) 2851 { 2852 struct fl_flow_tmplt *tmplt = tmplt_priv; 2853 2854 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2855 kfree(tmplt); 2856 } 2857 2858 static void fl_tmplt_reoffload(struct tcf_chain *chain, bool add, 2859 flow_setup_cb_t *cb, void *cb_priv) 2860 { 2861 struct fl_flow_tmplt *tmplt = chain->tmplt_priv; 2862 struct flow_cls_offload cls_flower = {}; 2863 2864 cls_flower.rule = flow_rule_alloc(0); 2865 if (!cls_flower.rule) 2866 return; 2867 2868 cls_flower.common.chain_index = chain->index; 2869 cls_flower.command = add ? FLOW_CLS_TMPLT_CREATE : 2870 FLOW_CLS_TMPLT_DESTROY; 2871 cls_flower.cookie = (unsigned long) tmplt; 2872 cls_flower.rule->match.dissector = &tmplt->dissector; 2873 cls_flower.rule->match.mask = &tmplt->mask; 2874 cls_flower.rule->match.key = &tmplt->dummy_key; 2875 2876 cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 2877 kfree(cls_flower.rule); 2878 } 2879 2880 static int fl_dump_key_val(struct sk_buff *skb, 2881 void *val, int val_type, 2882 void *mask, int mask_type, int len) 2883 { 2884 int err; 2885 2886 if (!memchr_inv(mask, 0, len)) 2887 return 0; 2888 err = nla_put(skb, val_type, len, val); 2889 if (err) 2890 return err; 2891 if (mask_type != TCA_FLOWER_UNSPEC) { 2892 err = nla_put(skb, mask_type, len, mask); 2893 if (err) 2894 return err; 2895 } 2896 return 0; 2897 } 2898 2899 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2900 struct fl_flow_key *mask) 2901 { 2902 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2903 TCA_FLOWER_KEY_PORT_DST_MIN, 2904 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2905 sizeof(key->tp_range.tp_min.dst)) || 2906 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2907 TCA_FLOWER_KEY_PORT_DST_MAX, 2908 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2909 sizeof(key->tp_range.tp_max.dst)) || 2910 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2911 TCA_FLOWER_KEY_PORT_SRC_MIN, 2912 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2913 sizeof(key->tp_range.tp_min.src)) || 2914 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2915 TCA_FLOWER_KEY_PORT_SRC_MAX, 2916 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2917 sizeof(key->tp_range.tp_max.src))) 2918 return -1; 2919 2920 return 0; 2921 } 2922 2923 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2924 struct flow_dissector_key_mpls *mpls_key, 2925 struct flow_dissector_key_mpls *mpls_mask, 2926 u8 lse_index) 2927 { 2928 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2929 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2930 int err; 2931 2932 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2933 lse_index + 1); 2934 if (err) 2935 return err; 2936 2937 if (lse_mask->mpls_ttl) { 2938 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2939 lse_key->mpls_ttl); 2940 if (err) 2941 return err; 2942 } 2943 if (lse_mask->mpls_bos) { 2944 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2945 lse_key->mpls_bos); 2946 if (err) 2947 return err; 2948 } 2949 if (lse_mask->mpls_tc) { 2950 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2951 lse_key->mpls_tc); 2952 if (err) 2953 return err; 2954 } 2955 if (lse_mask->mpls_label) { 2956 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2957 lse_key->mpls_label); 2958 if (err) 2959 return err; 2960 } 2961 2962 return 0; 2963 } 2964 2965 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2966 struct flow_dissector_key_mpls *mpls_key, 2967 struct flow_dissector_key_mpls *mpls_mask) 2968 { 2969 struct nlattr *opts; 2970 struct nlattr *lse; 2971 u8 lse_index; 2972 int err; 2973 2974 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2975 if (!opts) 2976 return -EMSGSIZE; 2977 2978 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2979 if (!(mpls_mask->used_lses & 1 << lse_index)) 2980 continue; 2981 2982 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2983 if (!lse) { 2984 err = -EMSGSIZE; 2985 goto err_opts; 2986 } 2987 2988 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2989 lse_index); 2990 if (err) 2991 goto err_opts_lse; 2992 nla_nest_end(skb, lse); 2993 } 2994 nla_nest_end(skb, opts); 2995 2996 return 0; 2997 2998 err_opts_lse: 2999 nla_nest_cancel(skb, lse); 3000 err_opts: 3001 nla_nest_cancel(skb, opts); 3002 3003 return err; 3004 } 3005 3006 static int fl_dump_key_mpls(struct sk_buff *skb, 3007 struct flow_dissector_key_mpls *mpls_key, 3008 struct flow_dissector_key_mpls *mpls_mask) 3009 { 3010 struct flow_dissector_mpls_lse *lse_mask; 3011 struct flow_dissector_mpls_lse *lse_key; 3012 int err; 3013 3014 if (!mpls_mask->used_lses) 3015 return 0; 3016 3017 lse_mask = &mpls_mask->ls[0]; 3018 lse_key = &mpls_key->ls[0]; 3019 3020 /* For backward compatibility, don't use the MPLS nested attributes if 3021 * the rule can be expressed using the old attributes. 3022 */ 3023 if (mpls_mask->used_lses & ~1 || 3024 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 3025 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 3026 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 3027 3028 if (lse_mask->mpls_ttl) { 3029 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 3030 lse_key->mpls_ttl); 3031 if (err) 3032 return err; 3033 } 3034 if (lse_mask->mpls_tc) { 3035 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 3036 lse_key->mpls_tc); 3037 if (err) 3038 return err; 3039 } 3040 if (lse_mask->mpls_label) { 3041 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 3042 lse_key->mpls_label); 3043 if (err) 3044 return err; 3045 } 3046 if (lse_mask->mpls_bos) { 3047 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 3048 lse_key->mpls_bos); 3049 if (err) 3050 return err; 3051 } 3052 return 0; 3053 } 3054 3055 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 3056 struct flow_dissector_key_ip *key, 3057 struct flow_dissector_key_ip *mask) 3058 { 3059 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 3060 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 3061 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 3062 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 3063 3064 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 3065 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 3066 return -1; 3067 3068 return 0; 3069 } 3070 3071 static int fl_dump_key_vlan(struct sk_buff *skb, 3072 int vlan_id_key, int vlan_prio_key, 3073 struct flow_dissector_key_vlan *vlan_key, 3074 struct flow_dissector_key_vlan *vlan_mask) 3075 { 3076 int err; 3077 3078 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 3079 return 0; 3080 if (vlan_mask->vlan_id) { 3081 err = nla_put_u16(skb, vlan_id_key, 3082 vlan_key->vlan_id); 3083 if (err) 3084 return err; 3085 } 3086 if (vlan_mask->vlan_priority) { 3087 err = nla_put_u8(skb, vlan_prio_key, 3088 vlan_key->vlan_priority); 3089 if (err) 3090 return err; 3091 } 3092 return 0; 3093 } 3094 3095 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 3096 u32 *flower_key, u32 *flower_mask, 3097 u32 flower_flag_bit, u32 dissector_flag_bit) 3098 { 3099 if (dissector_mask & dissector_flag_bit) { 3100 *flower_mask |= flower_flag_bit; 3101 if (dissector_key & dissector_flag_bit) 3102 *flower_key |= flower_flag_bit; 3103 } 3104 } 3105 3106 static int fl_dump_key_flags(struct sk_buff *skb, bool encap, 3107 u32 flags_key, u32 flags_mask) 3108 { 3109 int fl_key, fl_mask; 3110 __be32 _key, _mask; 3111 u32 key, mask; 3112 int err; 3113 3114 if (encap) { 3115 fl_key = TCA_FLOWER_KEY_ENC_FLAGS; 3116 fl_mask = TCA_FLOWER_KEY_ENC_FLAGS_MASK; 3117 } else { 3118 fl_key = TCA_FLOWER_KEY_FLAGS; 3119 fl_mask = TCA_FLOWER_KEY_FLAGS_MASK; 3120 } 3121 3122 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 3123 return 0; 3124 3125 key = 0; 3126 mask = 0; 3127 3128 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3129 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 3130 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3131 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 3132 FLOW_DIS_FIRST_FRAG); 3133 3134 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3135 TCA_FLOWER_KEY_FLAGS_TUNNEL_CSUM, 3136 FLOW_DIS_F_TUNNEL_CSUM); 3137 3138 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3139 TCA_FLOWER_KEY_FLAGS_TUNNEL_DONT_FRAGMENT, 3140 FLOW_DIS_F_TUNNEL_DONT_FRAGMENT); 3141 3142 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3143 TCA_FLOWER_KEY_FLAGS_TUNNEL_OAM, FLOW_DIS_F_TUNNEL_OAM); 3144 3145 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 3146 TCA_FLOWER_KEY_FLAGS_TUNNEL_CRIT_OPT, 3147 FLOW_DIS_F_TUNNEL_CRIT_OPT); 3148 3149 _key = cpu_to_be32(key); 3150 _mask = cpu_to_be32(mask); 3151 3152 err = nla_put(skb, fl_key, 4, &_key); 3153 if (err) 3154 return err; 3155 3156 return nla_put(skb, fl_mask, 4, &_mask); 3157 } 3158 3159 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 3160 struct flow_dissector_key_enc_opts *enc_opts) 3161 { 3162 struct geneve_opt *opt; 3163 struct nlattr *nest; 3164 int opt_off = 0; 3165 3166 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 3167 if (!nest) 3168 goto nla_put_failure; 3169 3170 while (enc_opts->len > opt_off) { 3171 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 3172 3173 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 3174 opt->opt_class)) 3175 goto nla_put_failure; 3176 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 3177 opt->type)) 3178 goto nla_put_failure; 3179 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 3180 opt->length * 4, opt->opt_data)) 3181 goto nla_put_failure; 3182 3183 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 3184 } 3185 nla_nest_end(skb, nest); 3186 return 0; 3187 3188 nla_put_failure: 3189 nla_nest_cancel(skb, nest); 3190 return -EMSGSIZE; 3191 } 3192 3193 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 3194 struct flow_dissector_key_enc_opts *enc_opts) 3195 { 3196 struct vxlan_metadata *md; 3197 struct nlattr *nest; 3198 3199 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 3200 if (!nest) 3201 goto nla_put_failure; 3202 3203 md = (struct vxlan_metadata *)&enc_opts->data[0]; 3204 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 3205 goto nla_put_failure; 3206 3207 nla_nest_end(skb, nest); 3208 return 0; 3209 3210 nla_put_failure: 3211 nla_nest_cancel(skb, nest); 3212 return -EMSGSIZE; 3213 } 3214 3215 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 3216 struct flow_dissector_key_enc_opts *enc_opts) 3217 { 3218 struct erspan_metadata *md; 3219 struct nlattr *nest; 3220 3221 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 3222 if (!nest) 3223 goto nla_put_failure; 3224 3225 md = (struct erspan_metadata *)&enc_opts->data[0]; 3226 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 3227 goto nla_put_failure; 3228 3229 if (md->version == 1 && 3230 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 3231 goto nla_put_failure; 3232 3233 if (md->version == 2 && 3234 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 3235 md->u.md2.dir) || 3236 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 3237 get_hwid(&md->u.md2)))) 3238 goto nla_put_failure; 3239 3240 nla_nest_end(skb, nest); 3241 return 0; 3242 3243 nla_put_failure: 3244 nla_nest_cancel(skb, nest); 3245 return -EMSGSIZE; 3246 } 3247 3248 static int fl_dump_key_gtp_opt(struct sk_buff *skb, 3249 struct flow_dissector_key_enc_opts *enc_opts) 3250 3251 { 3252 struct gtp_pdu_session_info *session_info; 3253 struct nlattr *nest; 3254 3255 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GTP); 3256 if (!nest) 3257 goto nla_put_failure; 3258 3259 session_info = (struct gtp_pdu_session_info *)&enc_opts->data[0]; 3260 3261 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_PDU_TYPE, 3262 session_info->pdu_type)) 3263 goto nla_put_failure; 3264 3265 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GTP_QFI, session_info->qfi)) 3266 goto nla_put_failure; 3267 3268 nla_nest_end(skb, nest); 3269 return 0; 3270 3271 nla_put_failure: 3272 nla_nest_cancel(skb, nest); 3273 return -EMSGSIZE; 3274 } 3275 3276 static int fl_dump_key_pfcp_opt(struct sk_buff *skb, 3277 struct flow_dissector_key_enc_opts *enc_opts) 3278 { 3279 struct pfcp_metadata *md; 3280 struct nlattr *nest; 3281 3282 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_PFCP); 3283 if (!nest) 3284 goto nla_put_failure; 3285 3286 md = (struct pfcp_metadata *)&enc_opts->data[0]; 3287 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_PFCP_TYPE, md->type)) 3288 goto nla_put_failure; 3289 3290 if (nla_put_be64(skb, TCA_FLOWER_KEY_ENC_OPT_PFCP_SEID, 3291 md->seid, 0)) 3292 goto nla_put_failure; 3293 3294 nla_nest_end(skb, nest); 3295 return 0; 3296 3297 nla_put_failure: 3298 nla_nest_cancel(skb, nest); 3299 return -EMSGSIZE; 3300 } 3301 3302 static int fl_dump_key_ct(struct sk_buff *skb, 3303 struct flow_dissector_key_ct *key, 3304 struct flow_dissector_key_ct *mask) 3305 { 3306 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 3307 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 3308 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 3309 sizeof(key->ct_state))) 3310 goto nla_put_failure; 3311 3312 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 3313 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 3314 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 3315 sizeof(key->ct_zone))) 3316 goto nla_put_failure; 3317 3318 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 3319 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 3320 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 3321 sizeof(key->ct_mark))) 3322 goto nla_put_failure; 3323 3324 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 3325 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 3326 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 3327 sizeof(key->ct_labels))) 3328 goto nla_put_failure; 3329 3330 return 0; 3331 3332 nla_put_failure: 3333 return -EMSGSIZE; 3334 } 3335 3336 static int fl_dump_key_cfm(struct sk_buff *skb, 3337 struct flow_dissector_key_cfm *key, 3338 struct flow_dissector_key_cfm *mask) 3339 { 3340 struct nlattr *opts; 3341 int err; 3342 u8 mdl; 3343 3344 if (!memchr_inv(mask, 0, sizeof(*mask))) 3345 return 0; 3346 3347 opts = nla_nest_start(skb, TCA_FLOWER_KEY_CFM); 3348 if (!opts) 3349 return -EMSGSIZE; 3350 3351 if (FIELD_GET(FLOW_DIS_CFM_MDL_MASK, mask->mdl_ver)) { 3352 mdl = FIELD_GET(FLOW_DIS_CFM_MDL_MASK, key->mdl_ver); 3353 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_MD_LEVEL, mdl); 3354 if (err) 3355 goto err_cfm_opts; 3356 } 3357 3358 if (mask->opcode) { 3359 err = nla_put_u8(skb, TCA_FLOWER_KEY_CFM_OPCODE, key->opcode); 3360 if (err) 3361 goto err_cfm_opts; 3362 } 3363 3364 nla_nest_end(skb, opts); 3365 3366 return 0; 3367 3368 err_cfm_opts: 3369 nla_nest_cancel(skb, opts); 3370 return err; 3371 } 3372 3373 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 3374 struct flow_dissector_key_enc_opts *enc_opts) 3375 { 3376 struct nlattr *nest; 3377 int err; 3378 3379 if (!enc_opts->len) 3380 return 0; 3381 3382 nest = nla_nest_start_noflag(skb, enc_opt_type); 3383 if (!nest) 3384 goto nla_put_failure; 3385 3386 switch (enc_opts->dst_opt_type) { 3387 case IP_TUNNEL_GENEVE_OPT_BIT: 3388 err = fl_dump_key_geneve_opt(skb, enc_opts); 3389 if (err) 3390 goto nla_put_failure; 3391 break; 3392 case IP_TUNNEL_VXLAN_OPT_BIT: 3393 err = fl_dump_key_vxlan_opt(skb, enc_opts); 3394 if (err) 3395 goto nla_put_failure; 3396 break; 3397 case IP_TUNNEL_ERSPAN_OPT_BIT: 3398 err = fl_dump_key_erspan_opt(skb, enc_opts); 3399 if (err) 3400 goto nla_put_failure; 3401 break; 3402 case IP_TUNNEL_GTP_OPT_BIT: 3403 err = fl_dump_key_gtp_opt(skb, enc_opts); 3404 if (err) 3405 goto nla_put_failure; 3406 break; 3407 case IP_TUNNEL_PFCP_OPT_BIT: 3408 err = fl_dump_key_pfcp_opt(skb, enc_opts); 3409 if (err) 3410 goto nla_put_failure; 3411 break; 3412 default: 3413 goto nla_put_failure; 3414 } 3415 nla_nest_end(skb, nest); 3416 return 0; 3417 3418 nla_put_failure: 3419 nla_nest_cancel(skb, nest); 3420 return -EMSGSIZE; 3421 } 3422 3423 static int fl_dump_key_enc_opt(struct sk_buff *skb, 3424 struct flow_dissector_key_enc_opts *key_opts, 3425 struct flow_dissector_key_enc_opts *msk_opts) 3426 { 3427 int err; 3428 3429 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 3430 if (err) 3431 return err; 3432 3433 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 3434 } 3435 3436 static int fl_dump_key(struct sk_buff *skb, struct net *net, 3437 struct fl_flow_key *key, struct fl_flow_key *mask) 3438 { 3439 if (mask->meta.ingress_ifindex) { 3440 struct net_device *dev; 3441 3442 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 3443 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 3444 goto nla_put_failure; 3445 } 3446 3447 if (fl_dump_key_val(skb, &key->meta.l2_miss, 3448 TCA_FLOWER_L2_MISS, &mask->meta.l2_miss, 3449 TCA_FLOWER_UNSPEC, sizeof(key->meta.l2_miss))) 3450 goto nla_put_failure; 3451 3452 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 3453 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 3454 sizeof(key->eth.dst)) || 3455 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 3456 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 3457 sizeof(key->eth.src)) || 3458 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 3459 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 3460 sizeof(key->basic.n_proto))) 3461 goto nla_put_failure; 3462 3463 if (mask->num_of_vlans.num_of_vlans) { 3464 if (nla_put_u8(skb, TCA_FLOWER_KEY_NUM_OF_VLANS, key->num_of_vlans.num_of_vlans)) 3465 goto nla_put_failure; 3466 } 3467 3468 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 3469 goto nla_put_failure; 3470 3471 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 3472 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 3473 goto nla_put_failure; 3474 3475 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 3476 TCA_FLOWER_KEY_CVLAN_PRIO, 3477 &key->cvlan, &mask->cvlan) || 3478 (mask->cvlan.vlan_tpid && 3479 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3480 key->cvlan.vlan_tpid))) 3481 goto nla_put_failure; 3482 3483 if (mask->basic.n_proto) { 3484 if (mask->cvlan.vlan_eth_type) { 3485 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 3486 key->basic.n_proto)) 3487 goto nla_put_failure; 3488 } else if (mask->vlan.vlan_eth_type) { 3489 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 3490 key->vlan.vlan_eth_type)) 3491 goto nla_put_failure; 3492 } 3493 } 3494 3495 if ((key->basic.n_proto == htons(ETH_P_IP) || 3496 key->basic.n_proto == htons(ETH_P_IPV6)) && 3497 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 3498 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 3499 sizeof(key->basic.ip_proto)) || 3500 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 3501 goto nla_put_failure; 3502 3503 if (mask->pppoe.session_id) { 3504 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPPOE_SID, 3505 key->pppoe.session_id)) 3506 goto nla_put_failure; 3507 } 3508 if (mask->basic.n_proto && mask->pppoe.ppp_proto) { 3509 if (nla_put_be16(skb, TCA_FLOWER_KEY_PPP_PROTO, 3510 key->pppoe.ppp_proto)) 3511 goto nla_put_failure; 3512 } 3513 3514 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3515 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 3516 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 3517 sizeof(key->ipv4.src)) || 3518 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 3519 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 3520 sizeof(key->ipv4.dst)))) 3521 goto nla_put_failure; 3522 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3523 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 3524 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 3525 sizeof(key->ipv6.src)) || 3526 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 3527 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 3528 sizeof(key->ipv6.dst)))) 3529 goto nla_put_failure; 3530 3531 if (key->basic.ip_proto == IPPROTO_TCP && 3532 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 3533 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 3534 sizeof(key->tp.src)) || 3535 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 3536 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 3537 sizeof(key->tp.dst)) || 3538 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 3539 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 3540 sizeof(key->tcp.flags)))) 3541 goto nla_put_failure; 3542 else if (key->basic.ip_proto == IPPROTO_UDP && 3543 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 3544 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 3545 sizeof(key->tp.src)) || 3546 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 3547 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 3548 sizeof(key->tp.dst)))) 3549 goto nla_put_failure; 3550 else if (key->basic.ip_proto == IPPROTO_SCTP && 3551 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 3552 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 3553 sizeof(key->tp.src)) || 3554 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 3555 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 3556 sizeof(key->tp.dst)))) 3557 goto nla_put_failure; 3558 else if (key->basic.n_proto == htons(ETH_P_IP) && 3559 key->basic.ip_proto == IPPROTO_ICMP && 3560 (fl_dump_key_val(skb, &key->icmp.type, 3561 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 3562 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 3563 sizeof(key->icmp.type)) || 3564 fl_dump_key_val(skb, &key->icmp.code, 3565 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 3566 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 3567 sizeof(key->icmp.code)))) 3568 goto nla_put_failure; 3569 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 3570 key->basic.ip_proto == IPPROTO_ICMPV6 && 3571 (fl_dump_key_val(skb, &key->icmp.type, 3572 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 3573 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 3574 sizeof(key->icmp.type)) || 3575 fl_dump_key_val(skb, &key->icmp.code, 3576 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 3577 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 3578 sizeof(key->icmp.code)))) 3579 goto nla_put_failure; 3580 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 3581 key->basic.n_proto == htons(ETH_P_RARP)) && 3582 (fl_dump_key_val(skb, &key->arp.sip, 3583 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 3584 TCA_FLOWER_KEY_ARP_SIP_MASK, 3585 sizeof(key->arp.sip)) || 3586 fl_dump_key_val(skb, &key->arp.tip, 3587 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 3588 TCA_FLOWER_KEY_ARP_TIP_MASK, 3589 sizeof(key->arp.tip)) || 3590 fl_dump_key_val(skb, &key->arp.op, 3591 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 3592 TCA_FLOWER_KEY_ARP_OP_MASK, 3593 sizeof(key->arp.op)) || 3594 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 3595 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 3596 sizeof(key->arp.sha)) || 3597 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 3598 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 3599 sizeof(key->arp.tha)))) 3600 goto nla_put_failure; 3601 else if (key->basic.ip_proto == IPPROTO_L2TP && 3602 fl_dump_key_val(skb, &key->l2tpv3.session_id, 3603 TCA_FLOWER_KEY_L2TPV3_SID, 3604 &mask->l2tpv3.session_id, 3605 TCA_FLOWER_UNSPEC, 3606 sizeof(key->l2tpv3.session_id))) 3607 goto nla_put_failure; 3608 3609 if (key->ipsec.spi && 3610 fl_dump_key_val(skb, &key->ipsec.spi, TCA_FLOWER_KEY_SPI, 3611 &mask->ipsec.spi, TCA_FLOWER_KEY_SPI_MASK, 3612 sizeof(key->ipsec.spi))) 3613 goto nla_put_failure; 3614 3615 if ((key->basic.ip_proto == IPPROTO_TCP || 3616 key->basic.ip_proto == IPPROTO_UDP || 3617 key->basic.ip_proto == IPPROTO_SCTP) && 3618 fl_dump_key_port_range(skb, key, mask)) 3619 goto nla_put_failure; 3620 3621 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 3622 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3623 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3624 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3625 sizeof(key->enc_ipv4.src)) || 3626 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3627 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3628 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3629 sizeof(key->enc_ipv4.dst)))) 3630 goto nla_put_failure; 3631 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3632 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3633 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3634 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3635 sizeof(key->enc_ipv6.src)) || 3636 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3637 TCA_FLOWER_KEY_ENC_IPV6_DST, 3638 &mask->enc_ipv6.dst, 3639 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3640 sizeof(key->enc_ipv6.dst)))) 3641 goto nla_put_failure; 3642 3643 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3644 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3645 sizeof(key->enc_key_id)) || 3646 fl_dump_key_val(skb, &key->enc_tp.src, 3647 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3648 &mask->enc_tp.src, 3649 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3650 sizeof(key->enc_tp.src)) || 3651 fl_dump_key_val(skb, &key->enc_tp.dst, 3652 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3653 &mask->enc_tp.dst, 3654 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3655 sizeof(key->enc_tp.dst)) || 3656 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3657 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3658 goto nla_put_failure; 3659 3660 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3661 goto nla_put_failure; 3662 3663 if (fl_dump_key_flags(skb, false, key->control.flags, 3664 mask->control.flags)) 3665 goto nla_put_failure; 3666 3667 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3668 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3669 sizeof(key->hash.hash))) 3670 goto nla_put_failure; 3671 3672 if (fl_dump_key_cfm(skb, &key->cfm, &mask->cfm)) 3673 goto nla_put_failure; 3674 3675 if (fl_dump_key_flags(skb, true, key->enc_control.flags, 3676 mask->enc_control.flags)) 3677 goto nla_put_failure; 3678 3679 return 0; 3680 3681 nla_put_failure: 3682 return -EMSGSIZE; 3683 } 3684 3685 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3686 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3687 { 3688 struct cls_fl_filter *f = fh; 3689 struct nlattr *nest; 3690 struct fl_flow_key *key, *mask; 3691 bool skip_hw; 3692 3693 if (!f) 3694 return skb->len; 3695 3696 t->tcm_handle = f->handle; 3697 3698 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3699 if (!nest) 3700 goto nla_put_failure; 3701 3702 spin_lock(&tp->lock); 3703 3704 if (f->res.classid && 3705 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3706 goto nla_put_failure_locked; 3707 3708 key = &f->key; 3709 mask = &f->mask->key; 3710 skip_hw = tc_skip_hw(f->flags); 3711 3712 if (fl_dump_key(skb, net, key, mask)) 3713 goto nla_put_failure_locked; 3714 3715 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3716 goto nla_put_failure_locked; 3717 3718 spin_unlock(&tp->lock); 3719 3720 if (!skip_hw) 3721 fl_hw_update_stats(tp, f, rtnl_held); 3722 3723 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3724 goto nla_put_failure; 3725 3726 if (tcf_exts_dump(skb, &f->exts)) 3727 goto nla_put_failure; 3728 3729 nla_nest_end(skb, nest); 3730 3731 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3732 goto nla_put_failure; 3733 3734 return skb->len; 3735 3736 nla_put_failure_locked: 3737 spin_unlock(&tp->lock); 3738 nla_put_failure: 3739 nla_nest_cancel(skb, nest); 3740 return -1; 3741 } 3742 3743 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3744 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3745 { 3746 struct cls_fl_filter *f = fh; 3747 struct nlattr *nest; 3748 bool skip_hw; 3749 3750 if (!f) 3751 return skb->len; 3752 3753 t->tcm_handle = f->handle; 3754 3755 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3756 if (!nest) 3757 goto nla_put_failure; 3758 3759 spin_lock(&tp->lock); 3760 3761 skip_hw = tc_skip_hw(f->flags); 3762 3763 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3764 goto nla_put_failure_locked; 3765 3766 spin_unlock(&tp->lock); 3767 3768 if (!skip_hw) 3769 fl_hw_update_stats(tp, f, rtnl_held); 3770 3771 if (tcf_exts_terse_dump(skb, &f->exts)) 3772 goto nla_put_failure; 3773 3774 nla_nest_end(skb, nest); 3775 3776 return skb->len; 3777 3778 nla_put_failure_locked: 3779 spin_unlock(&tp->lock); 3780 nla_put_failure: 3781 nla_nest_cancel(skb, nest); 3782 return -1; 3783 } 3784 3785 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3786 { 3787 struct fl_flow_tmplt *tmplt = tmplt_priv; 3788 struct fl_flow_key *key, *mask; 3789 struct nlattr *nest; 3790 3791 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3792 if (!nest) 3793 goto nla_put_failure; 3794 3795 key = &tmplt->dummy_key; 3796 mask = &tmplt->mask; 3797 3798 if (fl_dump_key(skb, net, key, mask)) 3799 goto nla_put_failure; 3800 3801 nla_nest_end(skb, nest); 3802 3803 return skb->len; 3804 3805 nla_put_failure: 3806 nla_nest_cancel(skb, nest); 3807 return -EMSGSIZE; 3808 } 3809 3810 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3811 unsigned long base) 3812 { 3813 struct cls_fl_filter *f = fh; 3814 3815 tc_cls_bind_class(classid, cl, q, &f->res, base); 3816 } 3817 3818 static bool fl_delete_empty(struct tcf_proto *tp) 3819 { 3820 struct cls_fl_head *head = fl_head_dereference(tp); 3821 3822 spin_lock(&tp->lock); 3823 tp->deleting = idr_is_empty(&head->handle_idr); 3824 spin_unlock(&tp->lock); 3825 3826 return tp->deleting; 3827 } 3828 3829 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3830 .kind = "flower", 3831 .classify = fl_classify, 3832 .init = fl_init, 3833 .destroy = fl_destroy, 3834 .get = fl_get, 3835 .put = fl_put, 3836 .change = fl_change, 3837 .delete = fl_delete, 3838 .delete_empty = fl_delete_empty, 3839 .walk = fl_walk, 3840 .reoffload = fl_reoffload, 3841 .hw_add = fl_hw_add, 3842 .hw_del = fl_hw_del, 3843 .dump = fl_dump, 3844 .terse_dump = fl_terse_dump, 3845 .bind_class = fl_bind_class, 3846 .tmplt_create = fl_tmplt_create, 3847 .tmplt_destroy = fl_tmplt_destroy, 3848 .tmplt_reoffload = fl_tmplt_reoffload, 3849 .tmplt_dump = fl_tmplt_dump, 3850 .get_exts = fl_get_exts, 3851 .owner = THIS_MODULE, 3852 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3853 }; 3854 MODULE_ALIAS_NET_CLS("flower"); 3855 3856 static int __init cls_fl_init(void) 3857 { 3858 return register_tcf_proto_ops(&cls_fl_ops); 3859 } 3860 3861 static void __exit cls_fl_exit(void) 3862 { 3863 unregister_tcf_proto_ops(&cls_fl_ops); 3864 } 3865 3866 module_init(cls_fl_init); 3867 module_exit(cls_fl_exit); 3868 3869 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3870 MODULE_DESCRIPTION("Flower classifier"); 3871 MODULE_LICENSE("GPL v2"); 3872