1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/sched/cls_flower.c Flower classifier 4 * 5 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/init.h> 10 #include <linux/module.h> 11 #include <linux/rhashtable.h> 12 #include <linux/workqueue.h> 13 #include <linux/refcount.h> 14 15 #include <linux/if_ether.h> 16 #include <linux/in6.h> 17 #include <linux/ip.h> 18 #include <linux/mpls.h> 19 20 #include <net/sch_generic.h> 21 #include <net/pkt_cls.h> 22 #include <net/ip.h> 23 #include <net/flow_dissector.h> 24 #include <net/geneve.h> 25 #include <net/vxlan.h> 26 #include <net/erspan.h> 27 28 #include <net/dst.h> 29 #include <net/dst_metadata.h> 30 31 #include <uapi/linux/netfilter/nf_conntrack_common.h> 32 33 struct fl_flow_key { 34 struct flow_dissector_key_meta meta; 35 struct flow_dissector_key_control control; 36 struct flow_dissector_key_control enc_control; 37 struct flow_dissector_key_basic basic; 38 struct flow_dissector_key_eth_addrs eth; 39 struct flow_dissector_key_vlan vlan; 40 struct flow_dissector_key_vlan cvlan; 41 union { 42 struct flow_dissector_key_ipv4_addrs ipv4; 43 struct flow_dissector_key_ipv6_addrs ipv6; 44 }; 45 struct flow_dissector_key_ports tp; 46 struct flow_dissector_key_icmp icmp; 47 struct flow_dissector_key_arp arp; 48 struct flow_dissector_key_keyid enc_key_id; 49 union { 50 struct flow_dissector_key_ipv4_addrs enc_ipv4; 51 struct flow_dissector_key_ipv6_addrs enc_ipv6; 52 }; 53 struct flow_dissector_key_ports enc_tp; 54 struct flow_dissector_key_mpls mpls; 55 struct flow_dissector_key_tcp tcp; 56 struct flow_dissector_key_ip ip; 57 struct flow_dissector_key_ip enc_ip; 58 struct flow_dissector_key_enc_opts enc_opts; 59 union { 60 struct flow_dissector_key_ports tp; 61 struct { 62 struct flow_dissector_key_ports tp_min; 63 struct flow_dissector_key_ports tp_max; 64 }; 65 } tp_range; 66 struct flow_dissector_key_ct ct; 67 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 68 69 struct fl_flow_mask_range { 70 unsigned short int start; 71 unsigned short int end; 72 }; 73 74 struct fl_flow_mask { 75 struct fl_flow_key key; 76 struct fl_flow_mask_range range; 77 u32 flags; 78 struct rhash_head ht_node; 79 struct rhashtable ht; 80 struct rhashtable_params filter_ht_params; 81 struct flow_dissector dissector; 82 struct list_head filters; 83 struct rcu_work rwork; 84 struct list_head list; 85 refcount_t refcnt; 86 }; 87 88 struct fl_flow_tmplt { 89 struct fl_flow_key dummy_key; 90 struct fl_flow_key mask; 91 struct flow_dissector dissector; 92 struct tcf_chain *chain; 93 }; 94 95 struct cls_fl_head { 96 struct rhashtable ht; 97 spinlock_t masks_lock; /* Protect masks list */ 98 struct list_head masks; 99 struct list_head hw_filters; 100 struct rcu_work rwork; 101 struct idr handle_idr; 102 }; 103 104 struct cls_fl_filter { 105 struct fl_flow_mask *mask; 106 struct rhash_head ht_node; 107 struct fl_flow_key mkey; 108 struct tcf_exts exts; 109 struct tcf_result res; 110 struct fl_flow_key key; 111 struct list_head list; 112 struct list_head hw_list; 113 u32 handle; 114 u32 flags; 115 u32 in_hw_count; 116 struct rcu_work rwork; 117 struct net_device *hw_dev; 118 /* Flower classifier is unlocked, which means that its reference counter 119 * can be changed concurrently without any kind of external 120 * synchronization. Use atomic reference counter to be concurrency-safe. 121 */ 122 refcount_t refcnt; 123 bool deleted; 124 }; 125 126 static const struct rhashtable_params mask_ht_params = { 127 .key_offset = offsetof(struct fl_flow_mask, key), 128 .key_len = sizeof(struct fl_flow_key), 129 .head_offset = offsetof(struct fl_flow_mask, ht_node), 130 .automatic_shrinking = true, 131 }; 132 133 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 134 { 135 return mask->range.end - mask->range.start; 136 } 137 138 static void fl_mask_update_range(struct fl_flow_mask *mask) 139 { 140 const u8 *bytes = (const u8 *) &mask->key; 141 size_t size = sizeof(mask->key); 142 size_t i, first = 0, last; 143 144 for (i = 0; i < size; i++) { 145 if (bytes[i]) { 146 first = i; 147 break; 148 } 149 } 150 last = first; 151 for (i = size - 1; i != first; i--) { 152 if (bytes[i]) { 153 last = i; 154 break; 155 } 156 } 157 mask->range.start = rounddown(first, sizeof(long)); 158 mask->range.end = roundup(last + 1, sizeof(long)); 159 } 160 161 static void *fl_key_get_start(struct fl_flow_key *key, 162 const struct fl_flow_mask *mask) 163 { 164 return (u8 *) key + mask->range.start; 165 } 166 167 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 168 struct fl_flow_mask *mask) 169 { 170 const long *lkey = fl_key_get_start(key, mask); 171 const long *lmask = fl_key_get_start(&mask->key, mask); 172 long *lmkey = fl_key_get_start(mkey, mask); 173 int i; 174 175 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 176 *lmkey++ = *lkey++ & *lmask++; 177 } 178 179 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 180 struct fl_flow_mask *mask) 181 { 182 const long *lmask = fl_key_get_start(&mask->key, mask); 183 const long *ltmplt; 184 int i; 185 186 if (!tmplt) 187 return true; 188 ltmplt = fl_key_get_start(&tmplt->mask, mask); 189 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 190 if (~*ltmplt++ & *lmask++) 191 return false; 192 } 193 return true; 194 } 195 196 static void fl_clear_masked_range(struct fl_flow_key *key, 197 struct fl_flow_mask *mask) 198 { 199 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 200 } 201 202 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 203 struct fl_flow_key *key, 204 struct fl_flow_key *mkey) 205 { 206 __be16 min_mask, max_mask, min_val, max_val; 207 208 min_mask = htons(filter->mask->key.tp_range.tp_min.dst); 209 max_mask = htons(filter->mask->key.tp_range.tp_max.dst); 210 min_val = htons(filter->key.tp_range.tp_min.dst); 211 max_val = htons(filter->key.tp_range.tp_max.dst); 212 213 if (min_mask && max_mask) { 214 if (htons(key->tp_range.tp.dst) < min_val || 215 htons(key->tp_range.tp.dst) > max_val) 216 return false; 217 218 /* skb does not have min and max values */ 219 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 220 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 221 } 222 return true; 223 } 224 225 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 226 struct fl_flow_key *key, 227 struct fl_flow_key *mkey) 228 { 229 __be16 min_mask, max_mask, min_val, max_val; 230 231 min_mask = htons(filter->mask->key.tp_range.tp_min.src); 232 max_mask = htons(filter->mask->key.tp_range.tp_max.src); 233 min_val = htons(filter->key.tp_range.tp_min.src); 234 max_val = htons(filter->key.tp_range.tp_max.src); 235 236 if (min_mask && max_mask) { 237 if (htons(key->tp_range.tp.src) < min_val || 238 htons(key->tp_range.tp.src) > max_val) 239 return false; 240 241 /* skb does not have min and max values */ 242 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 243 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 244 } 245 return true; 246 } 247 248 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 249 struct fl_flow_key *mkey) 250 { 251 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 252 mask->filter_ht_params); 253 } 254 255 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 256 struct fl_flow_key *mkey, 257 struct fl_flow_key *key) 258 { 259 struct cls_fl_filter *filter, *f; 260 261 list_for_each_entry_rcu(filter, &mask->filters, list) { 262 if (!fl_range_port_dst_cmp(filter, key, mkey)) 263 continue; 264 265 if (!fl_range_port_src_cmp(filter, key, mkey)) 266 continue; 267 268 f = __fl_lookup(mask, mkey); 269 if (f) 270 return f; 271 } 272 return NULL; 273 } 274 275 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask, 276 struct fl_flow_key *mkey, 277 struct fl_flow_key *key) 278 { 279 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 280 return fl_lookup_range(mask, mkey, key); 281 282 return __fl_lookup(mask, mkey); 283 } 284 285 static u16 fl_ct_info_to_flower_map[] = { 286 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 287 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 288 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 289 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 290 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 291 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 292 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 293 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 294 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 295 TCA_FLOWER_KEY_CT_FLAGS_NEW, 296 }; 297 298 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 299 struct tcf_result *res) 300 { 301 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 302 struct fl_flow_key skb_mkey; 303 struct fl_flow_key skb_key; 304 struct fl_flow_mask *mask; 305 struct cls_fl_filter *f; 306 307 list_for_each_entry_rcu(mask, &head->masks, list) { 308 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 309 fl_clear_masked_range(&skb_key, mask); 310 311 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 312 /* skb_flow_dissect() does not set n_proto in case an unknown 313 * protocol, so do it rather here. 314 */ 315 skb_key.basic.n_proto = skb->protocol; 316 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 317 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 318 fl_ct_info_to_flower_map, 319 ARRAY_SIZE(fl_ct_info_to_flower_map)); 320 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 321 322 fl_set_masked_key(&skb_mkey, &skb_key, mask); 323 324 f = fl_lookup(mask, &skb_mkey, &skb_key); 325 if (f && !tc_skip_sw(f->flags)) { 326 *res = f->res; 327 return tcf_exts_exec(skb, &f->exts, res); 328 } 329 } 330 return -1; 331 } 332 333 static int fl_init(struct tcf_proto *tp) 334 { 335 struct cls_fl_head *head; 336 337 head = kzalloc(sizeof(*head), GFP_KERNEL); 338 if (!head) 339 return -ENOBUFS; 340 341 spin_lock_init(&head->masks_lock); 342 INIT_LIST_HEAD_RCU(&head->masks); 343 INIT_LIST_HEAD(&head->hw_filters); 344 rcu_assign_pointer(tp->root, head); 345 idr_init(&head->handle_idr); 346 347 return rhashtable_init(&head->ht, &mask_ht_params); 348 } 349 350 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 351 { 352 /* temporary masks don't have their filters list and ht initialized */ 353 if (mask_init_done) { 354 WARN_ON(!list_empty(&mask->filters)); 355 rhashtable_destroy(&mask->ht); 356 } 357 kfree(mask); 358 } 359 360 static void fl_mask_free_work(struct work_struct *work) 361 { 362 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 363 struct fl_flow_mask, rwork); 364 365 fl_mask_free(mask, true); 366 } 367 368 static void fl_uninit_mask_free_work(struct work_struct *work) 369 { 370 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 371 struct fl_flow_mask, rwork); 372 373 fl_mask_free(mask, false); 374 } 375 376 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 377 { 378 if (!refcount_dec_and_test(&mask->refcnt)) 379 return false; 380 381 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 382 383 spin_lock(&head->masks_lock); 384 list_del_rcu(&mask->list); 385 spin_unlock(&head->masks_lock); 386 387 tcf_queue_work(&mask->rwork, fl_mask_free_work); 388 389 return true; 390 } 391 392 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 393 { 394 /* Flower classifier only changes root pointer during init and destroy. 395 * Users must obtain reference to tcf_proto instance before calling its 396 * API, so tp->root pointer is protected from concurrent call to 397 * fl_destroy() by reference counting. 398 */ 399 return rcu_dereference_raw(tp->root); 400 } 401 402 static void __fl_destroy_filter(struct cls_fl_filter *f) 403 { 404 tcf_exts_destroy(&f->exts); 405 tcf_exts_put_net(&f->exts); 406 kfree(f); 407 } 408 409 static void fl_destroy_filter_work(struct work_struct *work) 410 { 411 struct cls_fl_filter *f = container_of(to_rcu_work(work), 412 struct cls_fl_filter, rwork); 413 414 __fl_destroy_filter(f); 415 } 416 417 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 418 bool rtnl_held, struct netlink_ext_ack *extack) 419 { 420 struct tcf_block *block = tp->chain->block; 421 struct flow_cls_offload cls_flower = {}; 422 423 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 424 cls_flower.command = FLOW_CLS_DESTROY; 425 cls_flower.cookie = (unsigned long) f; 426 427 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 428 &f->flags, &f->in_hw_count, rtnl_held); 429 430 } 431 432 static int fl_hw_replace_filter(struct tcf_proto *tp, 433 struct cls_fl_filter *f, bool rtnl_held, 434 struct netlink_ext_ack *extack) 435 { 436 struct tcf_block *block = tp->chain->block; 437 struct flow_cls_offload cls_flower = {}; 438 bool skip_sw = tc_skip_sw(f->flags); 439 int err = 0; 440 441 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 442 if (!cls_flower.rule) 443 return -ENOMEM; 444 445 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 446 cls_flower.command = FLOW_CLS_REPLACE; 447 cls_flower.cookie = (unsigned long) f; 448 cls_flower.rule->match.dissector = &f->mask->dissector; 449 cls_flower.rule->match.mask = &f->mask->key; 450 cls_flower.rule->match.key = &f->mkey; 451 cls_flower.classid = f->res.classid; 452 453 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 454 if (err) { 455 kfree(cls_flower.rule); 456 if (skip_sw) { 457 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 458 return err; 459 } 460 return 0; 461 } 462 463 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 464 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 465 tc_cleanup_flow_action(&cls_flower.rule->action); 466 kfree(cls_flower.rule); 467 468 if (err) { 469 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 470 return err; 471 } 472 473 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 474 return -EINVAL; 475 476 return 0; 477 } 478 479 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 480 bool rtnl_held) 481 { 482 struct tcf_block *block = tp->chain->block; 483 struct flow_cls_offload cls_flower = {}; 484 485 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 486 cls_flower.command = FLOW_CLS_STATS; 487 cls_flower.cookie = (unsigned long) f; 488 cls_flower.classid = f->res.classid; 489 490 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 491 rtnl_held); 492 493 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes, 494 cls_flower.stats.pkts, 495 cls_flower.stats.lastused, 496 cls_flower.stats.used_hw_stats, 497 cls_flower.stats.used_hw_stats_valid); 498 } 499 500 static void __fl_put(struct cls_fl_filter *f) 501 { 502 if (!refcount_dec_and_test(&f->refcnt)) 503 return; 504 505 if (tcf_exts_get_net(&f->exts)) 506 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 507 else 508 __fl_destroy_filter(f); 509 } 510 511 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 512 { 513 struct cls_fl_filter *f; 514 515 rcu_read_lock(); 516 f = idr_find(&head->handle_idr, handle); 517 if (f && !refcount_inc_not_zero(&f->refcnt)) 518 f = NULL; 519 rcu_read_unlock(); 520 521 return f; 522 } 523 524 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 525 bool *last, bool rtnl_held, 526 struct netlink_ext_ack *extack) 527 { 528 struct cls_fl_head *head = fl_head_dereference(tp); 529 530 *last = false; 531 532 spin_lock(&tp->lock); 533 if (f->deleted) { 534 spin_unlock(&tp->lock); 535 return -ENOENT; 536 } 537 538 f->deleted = true; 539 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 540 f->mask->filter_ht_params); 541 idr_remove(&head->handle_idr, f->handle); 542 list_del_rcu(&f->list); 543 spin_unlock(&tp->lock); 544 545 *last = fl_mask_put(head, f->mask); 546 if (!tc_skip_hw(f->flags)) 547 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 548 tcf_unbind_filter(tp, &f->res); 549 __fl_put(f); 550 551 return 0; 552 } 553 554 static void fl_destroy_sleepable(struct work_struct *work) 555 { 556 struct cls_fl_head *head = container_of(to_rcu_work(work), 557 struct cls_fl_head, 558 rwork); 559 560 rhashtable_destroy(&head->ht); 561 kfree(head); 562 module_put(THIS_MODULE); 563 } 564 565 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 566 struct netlink_ext_ack *extack) 567 { 568 struct cls_fl_head *head = fl_head_dereference(tp); 569 struct fl_flow_mask *mask, *next_mask; 570 struct cls_fl_filter *f, *next; 571 bool last; 572 573 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 574 list_for_each_entry_safe(f, next, &mask->filters, list) { 575 __fl_delete(tp, f, &last, rtnl_held, extack); 576 if (last) 577 break; 578 } 579 } 580 idr_destroy(&head->handle_idr); 581 582 __module_get(THIS_MODULE); 583 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 584 } 585 586 static void fl_put(struct tcf_proto *tp, void *arg) 587 { 588 struct cls_fl_filter *f = arg; 589 590 __fl_put(f); 591 } 592 593 static void *fl_get(struct tcf_proto *tp, u32 handle) 594 { 595 struct cls_fl_head *head = fl_head_dereference(tp); 596 597 return __fl_get(head, handle); 598 } 599 600 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 601 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 602 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 603 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 604 .len = IFNAMSIZ }, 605 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 606 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 607 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 608 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 609 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 610 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 611 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 612 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 613 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 614 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 615 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 616 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 617 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 618 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 619 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 620 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 621 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 622 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 623 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 624 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 625 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 626 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 627 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 628 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 629 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 630 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 631 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 632 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 633 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 634 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 635 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 636 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 637 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 638 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 639 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 640 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 641 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 642 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 643 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 644 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 646 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 648 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 649 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 650 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 651 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 652 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 653 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 654 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 655 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 656 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 657 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 658 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 659 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 660 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 661 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 662 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 663 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 664 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 665 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 666 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 667 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 668 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 669 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 670 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 671 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 672 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 673 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 674 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 675 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 676 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 677 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 678 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 679 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 680 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 681 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 682 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 683 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 684 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 685 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 686 [TCA_FLOWER_KEY_CT_STATE] = { .type = NLA_U16 }, 687 [TCA_FLOWER_KEY_CT_STATE_MASK] = { .type = NLA_U16 }, 688 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 689 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 690 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 691 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 692 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 693 .len = 128 / BITS_PER_BYTE }, 694 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 695 .len = 128 / BITS_PER_BYTE }, 696 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 697 }; 698 699 static const struct nla_policy 700 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 701 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 702 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 703 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 704 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 705 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 706 }; 707 708 static const struct nla_policy 709 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 710 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 711 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 712 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 713 .len = 128 }, 714 }; 715 716 static const struct nla_policy 717 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 718 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 719 }; 720 721 static const struct nla_policy 722 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 723 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 724 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 725 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 726 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 727 }; 728 729 static void fl_set_key_val(struct nlattr **tb, 730 void *val, int val_type, 731 void *mask, int mask_type, int len) 732 { 733 if (!tb[val_type]) 734 return; 735 nla_memcpy(val, tb[val_type], len); 736 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 737 memset(mask, 0xff, len); 738 else 739 nla_memcpy(mask, tb[mask_type], len); 740 } 741 742 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 743 struct fl_flow_key *mask, 744 struct netlink_ext_ack *extack) 745 { 746 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 747 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 748 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 749 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 750 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 751 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 752 fl_set_key_val(tb, &key->tp_range.tp_min.src, 753 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 754 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 755 fl_set_key_val(tb, &key->tp_range.tp_max.src, 756 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 757 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 758 759 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 760 htons(key->tp_range.tp_max.dst) <= 761 htons(key->tp_range.tp_min.dst)) { 762 NL_SET_ERR_MSG_ATTR(extack, 763 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 764 "Invalid destination port range (min must be strictly smaller than max)"); 765 return -EINVAL; 766 } 767 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 768 htons(key->tp_range.tp_max.src) <= 769 htons(key->tp_range.tp_min.src)) { 770 NL_SET_ERR_MSG_ATTR(extack, 771 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 772 "Invalid source port range (min must be strictly smaller than max)"); 773 return -EINVAL; 774 } 775 776 return 0; 777 } 778 779 static int fl_set_key_mpls(struct nlattr **tb, 780 struct flow_dissector_key_mpls *key_val, 781 struct flow_dissector_key_mpls *key_mask, 782 struct netlink_ext_ack *extack) 783 { 784 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 785 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 786 key_mask->mpls_ttl = MPLS_TTL_MASK; 787 } 788 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 789 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 790 791 if (bos & ~MPLS_BOS_MASK) { 792 NL_SET_ERR_MSG_ATTR(extack, 793 tb[TCA_FLOWER_KEY_MPLS_BOS], 794 "Bottom Of Stack (BOS) must be 0 or 1"); 795 return -EINVAL; 796 } 797 key_val->mpls_bos = bos; 798 key_mask->mpls_bos = MPLS_BOS_MASK; 799 } 800 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 801 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 802 803 if (tc & ~MPLS_TC_MASK) { 804 NL_SET_ERR_MSG_ATTR(extack, 805 tb[TCA_FLOWER_KEY_MPLS_TC], 806 "Traffic Class (TC) must be between 0 and 7"); 807 return -EINVAL; 808 } 809 key_val->mpls_tc = tc; 810 key_mask->mpls_tc = MPLS_TC_MASK; 811 } 812 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 813 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 814 815 if (label & ~MPLS_LABEL_MASK) { 816 NL_SET_ERR_MSG_ATTR(extack, 817 tb[TCA_FLOWER_KEY_MPLS_LABEL], 818 "Label must be between 0 and 1048575"); 819 return -EINVAL; 820 } 821 key_val->mpls_label = label; 822 key_mask->mpls_label = MPLS_LABEL_MASK; 823 } 824 return 0; 825 } 826 827 static void fl_set_key_vlan(struct nlattr **tb, 828 __be16 ethertype, 829 int vlan_id_key, int vlan_prio_key, 830 struct flow_dissector_key_vlan *key_val, 831 struct flow_dissector_key_vlan *key_mask) 832 { 833 #define VLAN_PRIORITY_MASK 0x7 834 835 if (tb[vlan_id_key]) { 836 key_val->vlan_id = 837 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 838 key_mask->vlan_id = VLAN_VID_MASK; 839 } 840 if (tb[vlan_prio_key]) { 841 key_val->vlan_priority = 842 nla_get_u8(tb[vlan_prio_key]) & 843 VLAN_PRIORITY_MASK; 844 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 845 } 846 key_val->vlan_tpid = ethertype; 847 key_mask->vlan_tpid = cpu_to_be16(~0); 848 } 849 850 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 851 u32 *dissector_key, u32 *dissector_mask, 852 u32 flower_flag_bit, u32 dissector_flag_bit) 853 { 854 if (flower_mask & flower_flag_bit) { 855 *dissector_mask |= dissector_flag_bit; 856 if (flower_key & flower_flag_bit) 857 *dissector_key |= dissector_flag_bit; 858 } 859 } 860 861 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 862 u32 *flags_mask, struct netlink_ext_ack *extack) 863 { 864 u32 key, mask; 865 866 /* mask is mandatory for flags */ 867 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 868 NL_SET_ERR_MSG(extack, "Missing flags mask"); 869 return -EINVAL; 870 } 871 872 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 873 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 874 875 *flags_key = 0; 876 *flags_mask = 0; 877 878 fl_set_key_flag(key, mask, flags_key, flags_mask, 879 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 880 fl_set_key_flag(key, mask, flags_key, flags_mask, 881 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 882 FLOW_DIS_FIRST_FRAG); 883 884 return 0; 885 } 886 887 static void fl_set_key_ip(struct nlattr **tb, bool encap, 888 struct flow_dissector_key_ip *key, 889 struct flow_dissector_key_ip *mask) 890 { 891 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 892 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 893 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 894 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 895 896 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 897 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 898 } 899 900 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 901 int depth, int option_len, 902 struct netlink_ext_ack *extack) 903 { 904 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 905 struct nlattr *class = NULL, *type = NULL, *data = NULL; 906 struct geneve_opt *opt; 907 int err, data_len = 0; 908 909 if (option_len > sizeof(struct geneve_opt)) 910 data_len = option_len - sizeof(struct geneve_opt); 911 912 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 913 memset(opt, 0xff, option_len); 914 opt->length = data_len / 4; 915 opt->r1 = 0; 916 opt->r2 = 0; 917 opt->r3 = 0; 918 919 /* If no mask has been prodived we assume an exact match. */ 920 if (!depth) 921 return sizeof(struct geneve_opt) + data_len; 922 923 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 924 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 925 return -EINVAL; 926 } 927 928 err = nla_parse_nested_deprecated(tb, 929 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 930 nla, geneve_opt_policy, extack); 931 if (err < 0) 932 return err; 933 934 /* We are not allowed to omit any of CLASS, TYPE or DATA 935 * fields from the key. 936 */ 937 if (!option_len && 938 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 939 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 940 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 941 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 942 return -EINVAL; 943 } 944 945 /* Omitting any of CLASS, TYPE or DATA fields is allowed 946 * for the mask. 947 */ 948 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 949 int new_len = key->enc_opts.len; 950 951 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 952 data_len = nla_len(data); 953 if (data_len < 4) { 954 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 955 return -ERANGE; 956 } 957 if (data_len % 4) { 958 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 959 return -ERANGE; 960 } 961 962 new_len += sizeof(struct geneve_opt) + data_len; 963 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 964 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 965 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 966 return -ERANGE; 967 } 968 opt->length = data_len / 4; 969 memcpy(opt->opt_data, nla_data(data), data_len); 970 } 971 972 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 973 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 974 opt->opt_class = nla_get_be16(class); 975 } 976 977 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 978 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 979 opt->type = nla_get_u8(type); 980 } 981 982 return sizeof(struct geneve_opt) + data_len; 983 } 984 985 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 986 int depth, int option_len, 987 struct netlink_ext_ack *extack) 988 { 989 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 990 struct vxlan_metadata *md; 991 int err; 992 993 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 994 memset(md, 0xff, sizeof(*md)); 995 996 if (!depth) 997 return sizeof(*md); 998 999 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1000 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1001 return -EINVAL; 1002 } 1003 1004 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1005 vxlan_opt_policy, extack); 1006 if (err < 0) 1007 return err; 1008 1009 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1010 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1011 return -EINVAL; 1012 } 1013 1014 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) 1015 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1016 1017 return sizeof(*md); 1018 } 1019 1020 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1021 int depth, int option_len, 1022 struct netlink_ext_ack *extack) 1023 { 1024 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1025 struct erspan_metadata *md; 1026 int err; 1027 1028 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1029 memset(md, 0xff, sizeof(*md)); 1030 md->version = 1; 1031 1032 if (!depth) 1033 return sizeof(*md); 1034 1035 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1036 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1037 return -EINVAL; 1038 } 1039 1040 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1041 erspan_opt_policy, extack); 1042 if (err < 0) 1043 return err; 1044 1045 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1046 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1047 return -EINVAL; 1048 } 1049 1050 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1051 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1052 1053 if (md->version == 1) { 1054 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1055 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1056 return -EINVAL; 1057 } 1058 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1059 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1060 md->u.index = nla_get_be32(nla); 1061 } 1062 } else if (md->version == 2) { 1063 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1064 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1065 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1066 return -EINVAL; 1067 } 1068 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1069 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1070 md->u.md2.dir = nla_get_u8(nla); 1071 } 1072 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1073 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1074 set_hwid(&md->u.md2, nla_get_u8(nla)); 1075 } 1076 } else { 1077 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1078 return -EINVAL; 1079 } 1080 1081 return sizeof(*md); 1082 } 1083 1084 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1085 struct fl_flow_key *mask, 1086 struct netlink_ext_ack *extack) 1087 { 1088 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1089 int err, option_len, key_depth, msk_depth = 0; 1090 1091 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1092 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1093 enc_opts_policy, extack); 1094 if (err) 1095 return err; 1096 1097 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1098 1099 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1100 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1101 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1102 enc_opts_policy, extack); 1103 if (err) 1104 return err; 1105 1106 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1107 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1108 } 1109 1110 nla_for_each_attr(nla_opt_key, nla_enc_key, 1111 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1112 switch (nla_type(nla_opt_key)) { 1113 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1114 if (key->enc_opts.dst_opt_type && 1115 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1116 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1117 return -EINVAL; 1118 } 1119 option_len = 0; 1120 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1121 option_len = fl_set_geneve_opt(nla_opt_key, key, 1122 key_depth, option_len, 1123 extack); 1124 if (option_len < 0) 1125 return option_len; 1126 1127 key->enc_opts.len += option_len; 1128 /* At the same time we need to parse through the mask 1129 * in order to verify exact and mask attribute lengths. 1130 */ 1131 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1132 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1133 msk_depth, option_len, 1134 extack); 1135 if (option_len < 0) 1136 return option_len; 1137 1138 mask->enc_opts.len += option_len; 1139 if (key->enc_opts.len != mask->enc_opts.len) { 1140 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1141 return -EINVAL; 1142 } 1143 1144 if (msk_depth) 1145 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1146 break; 1147 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1148 if (key->enc_opts.dst_opt_type) { 1149 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1150 return -EINVAL; 1151 } 1152 option_len = 0; 1153 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1154 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1155 key_depth, option_len, 1156 extack); 1157 if (option_len < 0) 1158 return option_len; 1159 1160 key->enc_opts.len += option_len; 1161 /* At the same time we need to parse through the mask 1162 * in order to verify exact and mask attribute lengths. 1163 */ 1164 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1165 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1166 msk_depth, option_len, 1167 extack); 1168 if (option_len < 0) 1169 return option_len; 1170 1171 mask->enc_opts.len += option_len; 1172 if (key->enc_opts.len != mask->enc_opts.len) { 1173 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1174 return -EINVAL; 1175 } 1176 1177 if (msk_depth) 1178 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1179 break; 1180 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1181 if (key->enc_opts.dst_opt_type) { 1182 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1183 return -EINVAL; 1184 } 1185 option_len = 0; 1186 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1187 option_len = fl_set_erspan_opt(nla_opt_key, key, 1188 key_depth, option_len, 1189 extack); 1190 if (option_len < 0) 1191 return option_len; 1192 1193 key->enc_opts.len += option_len; 1194 /* At the same time we need to parse through the mask 1195 * in order to verify exact and mask attribute lengths. 1196 */ 1197 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1198 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1199 msk_depth, option_len, 1200 extack); 1201 if (option_len < 0) 1202 return option_len; 1203 1204 mask->enc_opts.len += option_len; 1205 if (key->enc_opts.len != mask->enc_opts.len) { 1206 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1207 return -EINVAL; 1208 } 1209 1210 if (msk_depth) 1211 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1212 break; 1213 default: 1214 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1215 return -EINVAL; 1216 } 1217 } 1218 1219 return 0; 1220 } 1221 1222 static int fl_set_key_ct(struct nlattr **tb, 1223 struct flow_dissector_key_ct *key, 1224 struct flow_dissector_key_ct *mask, 1225 struct netlink_ext_ack *extack) 1226 { 1227 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1228 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1229 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1230 return -EOPNOTSUPP; 1231 } 1232 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1233 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1234 sizeof(key->ct_state)); 1235 } 1236 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1237 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1238 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1239 return -EOPNOTSUPP; 1240 } 1241 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1242 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1243 sizeof(key->ct_zone)); 1244 } 1245 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1246 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1247 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1248 return -EOPNOTSUPP; 1249 } 1250 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1251 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1252 sizeof(key->ct_mark)); 1253 } 1254 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1255 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1256 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1257 return -EOPNOTSUPP; 1258 } 1259 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1260 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1261 sizeof(key->ct_labels)); 1262 } 1263 1264 return 0; 1265 } 1266 1267 static int fl_set_key(struct net *net, struct nlattr **tb, 1268 struct fl_flow_key *key, struct fl_flow_key *mask, 1269 struct netlink_ext_ack *extack) 1270 { 1271 __be16 ethertype; 1272 int ret = 0; 1273 1274 if (tb[TCA_FLOWER_INDEV]) { 1275 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1276 if (err < 0) 1277 return err; 1278 key->meta.ingress_ifindex = err; 1279 mask->meta.ingress_ifindex = 0xffffffff; 1280 } 1281 1282 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1283 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1284 sizeof(key->eth.dst)); 1285 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1286 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1287 sizeof(key->eth.src)); 1288 1289 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1290 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1291 1292 if (eth_type_vlan(ethertype)) { 1293 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1294 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 1295 &mask->vlan); 1296 1297 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1298 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1299 if (eth_type_vlan(ethertype)) { 1300 fl_set_key_vlan(tb, ethertype, 1301 TCA_FLOWER_KEY_CVLAN_ID, 1302 TCA_FLOWER_KEY_CVLAN_PRIO, 1303 &key->cvlan, &mask->cvlan); 1304 fl_set_key_val(tb, &key->basic.n_proto, 1305 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1306 &mask->basic.n_proto, 1307 TCA_FLOWER_UNSPEC, 1308 sizeof(key->basic.n_proto)); 1309 } else { 1310 key->basic.n_proto = ethertype; 1311 mask->basic.n_proto = cpu_to_be16(~0); 1312 } 1313 } 1314 } else { 1315 key->basic.n_proto = ethertype; 1316 mask->basic.n_proto = cpu_to_be16(~0); 1317 } 1318 } 1319 1320 if (key->basic.n_proto == htons(ETH_P_IP) || 1321 key->basic.n_proto == htons(ETH_P_IPV6)) { 1322 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1323 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1324 sizeof(key->basic.ip_proto)); 1325 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1326 } 1327 1328 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1329 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1330 mask->control.addr_type = ~0; 1331 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1332 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1333 sizeof(key->ipv4.src)); 1334 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1335 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1336 sizeof(key->ipv4.dst)); 1337 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1338 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1339 mask->control.addr_type = ~0; 1340 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1341 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1342 sizeof(key->ipv6.src)); 1343 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1344 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1345 sizeof(key->ipv6.dst)); 1346 } 1347 1348 if (key->basic.ip_proto == IPPROTO_TCP) { 1349 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1350 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1351 sizeof(key->tp.src)); 1352 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1353 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1354 sizeof(key->tp.dst)); 1355 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1356 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1357 sizeof(key->tcp.flags)); 1358 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1359 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1360 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1361 sizeof(key->tp.src)); 1362 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1363 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1364 sizeof(key->tp.dst)); 1365 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1366 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1367 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1368 sizeof(key->tp.src)); 1369 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1370 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1371 sizeof(key->tp.dst)); 1372 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1373 key->basic.ip_proto == IPPROTO_ICMP) { 1374 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1375 &mask->icmp.type, 1376 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1377 sizeof(key->icmp.type)); 1378 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1379 &mask->icmp.code, 1380 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1381 sizeof(key->icmp.code)); 1382 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1383 key->basic.ip_proto == IPPROTO_ICMPV6) { 1384 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1385 &mask->icmp.type, 1386 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1387 sizeof(key->icmp.type)); 1388 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1389 &mask->icmp.code, 1390 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1391 sizeof(key->icmp.code)); 1392 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1393 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1394 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1395 if (ret) 1396 return ret; 1397 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1398 key->basic.n_proto == htons(ETH_P_RARP)) { 1399 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1400 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1401 sizeof(key->arp.sip)); 1402 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1403 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1404 sizeof(key->arp.tip)); 1405 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1406 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1407 sizeof(key->arp.op)); 1408 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1409 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1410 sizeof(key->arp.sha)); 1411 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1412 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1413 sizeof(key->arp.tha)); 1414 } 1415 1416 if (key->basic.ip_proto == IPPROTO_TCP || 1417 key->basic.ip_proto == IPPROTO_UDP || 1418 key->basic.ip_proto == IPPROTO_SCTP) { 1419 ret = fl_set_key_port_range(tb, key, mask, extack); 1420 if (ret) 1421 return ret; 1422 } 1423 1424 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1425 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1426 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1427 mask->enc_control.addr_type = ~0; 1428 fl_set_key_val(tb, &key->enc_ipv4.src, 1429 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1430 &mask->enc_ipv4.src, 1431 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1432 sizeof(key->enc_ipv4.src)); 1433 fl_set_key_val(tb, &key->enc_ipv4.dst, 1434 TCA_FLOWER_KEY_ENC_IPV4_DST, 1435 &mask->enc_ipv4.dst, 1436 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1437 sizeof(key->enc_ipv4.dst)); 1438 } 1439 1440 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1441 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1442 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1443 mask->enc_control.addr_type = ~0; 1444 fl_set_key_val(tb, &key->enc_ipv6.src, 1445 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1446 &mask->enc_ipv6.src, 1447 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1448 sizeof(key->enc_ipv6.src)); 1449 fl_set_key_val(tb, &key->enc_ipv6.dst, 1450 TCA_FLOWER_KEY_ENC_IPV6_DST, 1451 &mask->enc_ipv6.dst, 1452 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1453 sizeof(key->enc_ipv6.dst)); 1454 } 1455 1456 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1457 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1458 sizeof(key->enc_key_id.keyid)); 1459 1460 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1461 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1462 sizeof(key->enc_tp.src)); 1463 1464 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1465 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1466 sizeof(key->enc_tp.dst)); 1467 1468 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1469 1470 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1471 ret = fl_set_enc_opt(tb, key, mask, extack); 1472 if (ret) 1473 return ret; 1474 } 1475 1476 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1477 if (ret) 1478 return ret; 1479 1480 if (tb[TCA_FLOWER_KEY_FLAGS]) 1481 ret = fl_set_key_flags(tb, &key->control.flags, 1482 &mask->control.flags, extack); 1483 1484 return ret; 1485 } 1486 1487 static void fl_mask_copy(struct fl_flow_mask *dst, 1488 struct fl_flow_mask *src) 1489 { 1490 const void *psrc = fl_key_get_start(&src->key, src); 1491 void *pdst = fl_key_get_start(&dst->key, src); 1492 1493 memcpy(pdst, psrc, fl_mask_range(src)); 1494 dst->range = src->range; 1495 } 1496 1497 static const struct rhashtable_params fl_ht_params = { 1498 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1499 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1500 .automatic_shrinking = true, 1501 }; 1502 1503 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1504 { 1505 mask->filter_ht_params = fl_ht_params; 1506 mask->filter_ht_params.key_len = fl_mask_range(mask); 1507 mask->filter_ht_params.key_offset += mask->range.start; 1508 1509 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1510 } 1511 1512 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1513 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1514 1515 #define FL_KEY_IS_MASKED(mask, member) \ 1516 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1517 0, FL_KEY_MEMBER_SIZE(member)) \ 1518 1519 #define FL_KEY_SET(keys, cnt, id, member) \ 1520 do { \ 1521 keys[cnt].key_id = id; \ 1522 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1523 cnt++; \ 1524 } while(0); 1525 1526 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1527 do { \ 1528 if (FL_KEY_IS_MASKED(mask, member)) \ 1529 FL_KEY_SET(keys, cnt, id, member); \ 1530 } while(0); 1531 1532 static void fl_init_dissector(struct flow_dissector *dissector, 1533 struct fl_flow_key *mask) 1534 { 1535 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1536 size_t cnt = 0; 1537 1538 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1539 FLOW_DISSECTOR_KEY_META, meta); 1540 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1541 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1542 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1543 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1544 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1545 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1546 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1547 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1548 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1549 FLOW_DISSECTOR_KEY_PORTS, tp); 1550 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1551 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1552 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1553 FLOW_DISSECTOR_KEY_IP, ip); 1554 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1555 FLOW_DISSECTOR_KEY_TCP, tcp); 1556 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1557 FLOW_DISSECTOR_KEY_ICMP, icmp); 1558 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1559 FLOW_DISSECTOR_KEY_ARP, arp); 1560 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1561 FLOW_DISSECTOR_KEY_MPLS, mpls); 1562 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1563 FLOW_DISSECTOR_KEY_VLAN, vlan); 1564 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1565 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1566 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1567 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1568 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1569 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1570 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1571 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1572 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1573 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1574 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1575 enc_control); 1576 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1577 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1578 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1579 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1580 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1581 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1582 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1583 FLOW_DISSECTOR_KEY_CT, ct); 1584 1585 skb_flow_dissector_init(dissector, keys, cnt); 1586 } 1587 1588 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1589 struct fl_flow_mask *mask) 1590 { 1591 struct fl_flow_mask *newmask; 1592 int err; 1593 1594 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1595 if (!newmask) 1596 return ERR_PTR(-ENOMEM); 1597 1598 fl_mask_copy(newmask, mask); 1599 1600 if ((newmask->key.tp_range.tp_min.dst && 1601 newmask->key.tp_range.tp_max.dst) || 1602 (newmask->key.tp_range.tp_min.src && 1603 newmask->key.tp_range.tp_max.src)) 1604 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1605 1606 err = fl_init_mask_hashtable(newmask); 1607 if (err) 1608 goto errout_free; 1609 1610 fl_init_dissector(&newmask->dissector, &newmask->key); 1611 1612 INIT_LIST_HEAD_RCU(&newmask->filters); 1613 1614 refcount_set(&newmask->refcnt, 1); 1615 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1616 &newmask->ht_node, mask_ht_params); 1617 if (err) 1618 goto errout_destroy; 1619 1620 spin_lock(&head->masks_lock); 1621 list_add_tail_rcu(&newmask->list, &head->masks); 1622 spin_unlock(&head->masks_lock); 1623 1624 return newmask; 1625 1626 errout_destroy: 1627 rhashtable_destroy(&newmask->ht); 1628 errout_free: 1629 kfree(newmask); 1630 1631 return ERR_PTR(err); 1632 } 1633 1634 static int fl_check_assign_mask(struct cls_fl_head *head, 1635 struct cls_fl_filter *fnew, 1636 struct cls_fl_filter *fold, 1637 struct fl_flow_mask *mask) 1638 { 1639 struct fl_flow_mask *newmask; 1640 int ret = 0; 1641 1642 rcu_read_lock(); 1643 1644 /* Insert mask as temporary node to prevent concurrent creation of mask 1645 * with same key. Any concurrent lookups with same key will return 1646 * -EAGAIN because mask's refcnt is zero. 1647 */ 1648 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1649 &mask->ht_node, 1650 mask_ht_params); 1651 if (!fnew->mask) { 1652 rcu_read_unlock(); 1653 1654 if (fold) { 1655 ret = -EINVAL; 1656 goto errout_cleanup; 1657 } 1658 1659 newmask = fl_create_new_mask(head, mask); 1660 if (IS_ERR(newmask)) { 1661 ret = PTR_ERR(newmask); 1662 goto errout_cleanup; 1663 } 1664 1665 fnew->mask = newmask; 1666 return 0; 1667 } else if (IS_ERR(fnew->mask)) { 1668 ret = PTR_ERR(fnew->mask); 1669 } else if (fold && fold->mask != fnew->mask) { 1670 ret = -EINVAL; 1671 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1672 /* Mask was deleted concurrently, try again */ 1673 ret = -EAGAIN; 1674 } 1675 rcu_read_unlock(); 1676 return ret; 1677 1678 errout_cleanup: 1679 rhashtable_remove_fast(&head->ht, &mask->ht_node, 1680 mask_ht_params); 1681 return ret; 1682 } 1683 1684 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1685 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1686 unsigned long base, struct nlattr **tb, 1687 struct nlattr *est, bool ovr, 1688 struct fl_flow_tmplt *tmplt, bool rtnl_held, 1689 struct netlink_ext_ack *extack) 1690 { 1691 int err; 1692 1693 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held, 1694 extack); 1695 if (err < 0) 1696 return err; 1697 1698 if (tb[TCA_FLOWER_CLASSID]) { 1699 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1700 if (!rtnl_held) 1701 rtnl_lock(); 1702 tcf_bind_filter(tp, &f->res, base); 1703 if (!rtnl_held) 1704 rtnl_unlock(); 1705 } 1706 1707 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1708 if (err) 1709 return err; 1710 1711 fl_mask_update_range(mask); 1712 fl_set_masked_key(&f->mkey, &f->key, mask); 1713 1714 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1715 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1716 return -EINVAL; 1717 } 1718 1719 return 0; 1720 } 1721 1722 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 1723 struct cls_fl_filter *fold, 1724 bool *in_ht) 1725 { 1726 struct fl_flow_mask *mask = fnew->mask; 1727 int err; 1728 1729 err = rhashtable_lookup_insert_fast(&mask->ht, 1730 &fnew->ht_node, 1731 mask->filter_ht_params); 1732 if (err) { 1733 *in_ht = false; 1734 /* It is okay if filter with same key exists when 1735 * overwriting. 1736 */ 1737 return fold && err == -EEXIST ? 0 : err; 1738 } 1739 1740 *in_ht = true; 1741 return 0; 1742 } 1743 1744 static int fl_change(struct net *net, struct sk_buff *in_skb, 1745 struct tcf_proto *tp, unsigned long base, 1746 u32 handle, struct nlattr **tca, 1747 void **arg, bool ovr, bool rtnl_held, 1748 struct netlink_ext_ack *extack) 1749 { 1750 struct cls_fl_head *head = fl_head_dereference(tp); 1751 struct cls_fl_filter *fold = *arg; 1752 struct cls_fl_filter *fnew; 1753 struct fl_flow_mask *mask; 1754 struct nlattr **tb; 1755 bool in_ht; 1756 int err; 1757 1758 if (!tca[TCA_OPTIONS]) { 1759 err = -EINVAL; 1760 goto errout_fold; 1761 } 1762 1763 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1764 if (!mask) { 1765 err = -ENOBUFS; 1766 goto errout_fold; 1767 } 1768 1769 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1770 if (!tb) { 1771 err = -ENOBUFS; 1772 goto errout_mask_alloc; 1773 } 1774 1775 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1776 tca[TCA_OPTIONS], fl_policy, NULL); 1777 if (err < 0) 1778 goto errout_tb; 1779 1780 if (fold && handle && fold->handle != handle) { 1781 err = -EINVAL; 1782 goto errout_tb; 1783 } 1784 1785 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1786 if (!fnew) { 1787 err = -ENOBUFS; 1788 goto errout_tb; 1789 } 1790 INIT_LIST_HEAD(&fnew->hw_list); 1791 refcount_set(&fnew->refcnt, 1); 1792 1793 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 1794 if (err < 0) 1795 goto errout; 1796 1797 if (tb[TCA_FLOWER_FLAGS]) { 1798 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1799 1800 if (!tc_flags_valid(fnew->flags)) { 1801 err = -EINVAL; 1802 goto errout; 1803 } 1804 } 1805 1806 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 1807 tp->chain->tmplt_priv, rtnl_held, extack); 1808 if (err) 1809 goto errout; 1810 1811 err = fl_check_assign_mask(head, fnew, fold, mask); 1812 if (err) 1813 goto errout; 1814 1815 err = fl_ht_insert_unique(fnew, fold, &in_ht); 1816 if (err) 1817 goto errout_mask; 1818 1819 if (!tc_skip_hw(fnew->flags)) { 1820 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 1821 if (err) 1822 goto errout_ht; 1823 } 1824 1825 if (!tc_in_hw(fnew->flags)) 1826 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1827 1828 spin_lock(&tp->lock); 1829 1830 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 1831 * proto again or create new one, if necessary. 1832 */ 1833 if (tp->deleting) { 1834 err = -EAGAIN; 1835 goto errout_hw; 1836 } 1837 1838 if (fold) { 1839 /* Fold filter was deleted concurrently. Retry lookup. */ 1840 if (fold->deleted) { 1841 err = -EAGAIN; 1842 goto errout_hw; 1843 } 1844 1845 fnew->handle = handle; 1846 1847 if (!in_ht) { 1848 struct rhashtable_params params = 1849 fnew->mask->filter_ht_params; 1850 1851 err = rhashtable_insert_fast(&fnew->mask->ht, 1852 &fnew->ht_node, 1853 params); 1854 if (err) 1855 goto errout_hw; 1856 in_ht = true; 1857 } 1858 1859 refcount_inc(&fnew->refcnt); 1860 rhashtable_remove_fast(&fold->mask->ht, 1861 &fold->ht_node, 1862 fold->mask->filter_ht_params); 1863 idr_replace(&head->handle_idr, fnew, fnew->handle); 1864 list_replace_rcu(&fold->list, &fnew->list); 1865 fold->deleted = true; 1866 1867 spin_unlock(&tp->lock); 1868 1869 fl_mask_put(head, fold->mask); 1870 if (!tc_skip_hw(fold->flags)) 1871 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 1872 tcf_unbind_filter(tp, &fold->res); 1873 /* Caller holds reference to fold, so refcnt is always > 0 1874 * after this. 1875 */ 1876 refcount_dec(&fold->refcnt); 1877 __fl_put(fold); 1878 } else { 1879 if (handle) { 1880 /* user specifies a handle and it doesn't exist */ 1881 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1882 handle, GFP_ATOMIC); 1883 1884 /* Filter with specified handle was concurrently 1885 * inserted after initial check in cls_api. This is not 1886 * necessarily an error if NLM_F_EXCL is not set in 1887 * message flags. Returning EAGAIN will cause cls_api to 1888 * try to update concurrently inserted rule. 1889 */ 1890 if (err == -ENOSPC) 1891 err = -EAGAIN; 1892 } else { 1893 handle = 1; 1894 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1895 INT_MAX, GFP_ATOMIC); 1896 } 1897 if (err) 1898 goto errout_hw; 1899 1900 refcount_inc(&fnew->refcnt); 1901 fnew->handle = handle; 1902 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1903 spin_unlock(&tp->lock); 1904 } 1905 1906 *arg = fnew; 1907 1908 kfree(tb); 1909 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 1910 return 0; 1911 1912 errout_ht: 1913 spin_lock(&tp->lock); 1914 errout_hw: 1915 fnew->deleted = true; 1916 spin_unlock(&tp->lock); 1917 if (!tc_skip_hw(fnew->flags)) 1918 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 1919 if (in_ht) 1920 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 1921 fnew->mask->filter_ht_params); 1922 errout_mask: 1923 fl_mask_put(head, fnew->mask); 1924 errout: 1925 __fl_put(fnew); 1926 errout_tb: 1927 kfree(tb); 1928 errout_mask_alloc: 1929 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 1930 errout_fold: 1931 if (fold) 1932 __fl_put(fold); 1933 return err; 1934 } 1935 1936 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1937 bool rtnl_held, struct netlink_ext_ack *extack) 1938 { 1939 struct cls_fl_head *head = fl_head_dereference(tp); 1940 struct cls_fl_filter *f = arg; 1941 bool last_on_mask; 1942 int err = 0; 1943 1944 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 1945 *last = list_empty(&head->masks); 1946 __fl_put(f); 1947 1948 return err; 1949 } 1950 1951 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 1952 bool rtnl_held) 1953 { 1954 struct cls_fl_head *head = fl_head_dereference(tp); 1955 unsigned long id = arg->cookie, tmp; 1956 struct cls_fl_filter *f; 1957 1958 arg->count = arg->skip; 1959 1960 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 1961 /* don't return filters that are being deleted */ 1962 if (!refcount_inc_not_zero(&f->refcnt)) 1963 continue; 1964 if (arg->fn(tp, f, arg) < 0) { 1965 __fl_put(f); 1966 arg->stop = 1; 1967 break; 1968 } 1969 __fl_put(f); 1970 arg->count++; 1971 } 1972 arg->cookie = id; 1973 } 1974 1975 static struct cls_fl_filter * 1976 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 1977 { 1978 struct cls_fl_head *head = fl_head_dereference(tp); 1979 1980 spin_lock(&tp->lock); 1981 if (list_empty(&head->hw_filters)) { 1982 spin_unlock(&tp->lock); 1983 return NULL; 1984 } 1985 1986 if (!f) 1987 f = list_entry(&head->hw_filters, struct cls_fl_filter, 1988 hw_list); 1989 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 1990 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 1991 spin_unlock(&tp->lock); 1992 return f; 1993 } 1994 } 1995 1996 spin_unlock(&tp->lock); 1997 return NULL; 1998 } 1999 2000 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2001 void *cb_priv, struct netlink_ext_ack *extack) 2002 { 2003 struct tcf_block *block = tp->chain->block; 2004 struct flow_cls_offload cls_flower = {}; 2005 struct cls_fl_filter *f = NULL; 2006 int err; 2007 2008 /* hw_filters list can only be changed by hw offload functions after 2009 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2010 * iterating it. 2011 */ 2012 ASSERT_RTNL(); 2013 2014 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2015 cls_flower.rule = 2016 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2017 if (!cls_flower.rule) { 2018 __fl_put(f); 2019 return -ENOMEM; 2020 } 2021 2022 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2023 extack); 2024 cls_flower.command = add ? 2025 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2026 cls_flower.cookie = (unsigned long)f; 2027 cls_flower.rule->match.dissector = &f->mask->dissector; 2028 cls_flower.rule->match.mask = &f->mask->key; 2029 cls_flower.rule->match.key = &f->mkey; 2030 2031 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 2032 if (err) { 2033 kfree(cls_flower.rule); 2034 if (tc_skip_sw(f->flags)) { 2035 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 2036 __fl_put(f); 2037 return err; 2038 } 2039 goto next_flow; 2040 } 2041 2042 cls_flower.classid = f->res.classid; 2043 2044 err = tc_setup_cb_reoffload(block, tp, add, cb, 2045 TC_SETUP_CLSFLOWER, &cls_flower, 2046 cb_priv, &f->flags, 2047 &f->in_hw_count); 2048 tc_cleanup_flow_action(&cls_flower.rule->action); 2049 kfree(cls_flower.rule); 2050 2051 if (err) { 2052 __fl_put(f); 2053 return err; 2054 } 2055 next_flow: 2056 __fl_put(f); 2057 } 2058 2059 return 0; 2060 } 2061 2062 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2063 { 2064 struct flow_cls_offload *cls_flower = type_data; 2065 struct cls_fl_filter *f = 2066 (struct cls_fl_filter *) cls_flower->cookie; 2067 struct cls_fl_head *head = fl_head_dereference(tp); 2068 2069 spin_lock(&tp->lock); 2070 list_add(&f->hw_list, &head->hw_filters); 2071 spin_unlock(&tp->lock); 2072 } 2073 2074 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2075 { 2076 struct flow_cls_offload *cls_flower = type_data; 2077 struct cls_fl_filter *f = 2078 (struct cls_fl_filter *) cls_flower->cookie; 2079 2080 spin_lock(&tp->lock); 2081 if (!list_empty(&f->hw_list)) 2082 list_del_init(&f->hw_list); 2083 spin_unlock(&tp->lock); 2084 } 2085 2086 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2087 struct fl_flow_tmplt *tmplt) 2088 { 2089 struct flow_cls_offload cls_flower = {}; 2090 struct tcf_block *block = chain->block; 2091 2092 cls_flower.rule = flow_rule_alloc(0); 2093 if (!cls_flower.rule) 2094 return -ENOMEM; 2095 2096 cls_flower.common.chain_index = chain->index; 2097 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2098 cls_flower.cookie = (unsigned long) tmplt; 2099 cls_flower.rule->match.dissector = &tmplt->dissector; 2100 cls_flower.rule->match.mask = &tmplt->mask; 2101 cls_flower.rule->match.key = &tmplt->dummy_key; 2102 2103 /* We don't care if driver (any of them) fails to handle this 2104 * call. It serves just as a hint for it. 2105 */ 2106 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2107 kfree(cls_flower.rule); 2108 2109 return 0; 2110 } 2111 2112 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2113 struct fl_flow_tmplt *tmplt) 2114 { 2115 struct flow_cls_offload cls_flower = {}; 2116 struct tcf_block *block = chain->block; 2117 2118 cls_flower.common.chain_index = chain->index; 2119 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2120 cls_flower.cookie = (unsigned long) tmplt; 2121 2122 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2123 } 2124 2125 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2126 struct nlattr **tca, 2127 struct netlink_ext_ack *extack) 2128 { 2129 struct fl_flow_tmplt *tmplt; 2130 struct nlattr **tb; 2131 int err; 2132 2133 if (!tca[TCA_OPTIONS]) 2134 return ERR_PTR(-EINVAL); 2135 2136 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2137 if (!tb) 2138 return ERR_PTR(-ENOBUFS); 2139 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2140 tca[TCA_OPTIONS], fl_policy, NULL); 2141 if (err) 2142 goto errout_tb; 2143 2144 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2145 if (!tmplt) { 2146 err = -ENOMEM; 2147 goto errout_tb; 2148 } 2149 tmplt->chain = chain; 2150 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2151 if (err) 2152 goto errout_tmplt; 2153 2154 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2155 2156 err = fl_hw_create_tmplt(chain, tmplt); 2157 if (err) 2158 goto errout_tmplt; 2159 2160 kfree(tb); 2161 return tmplt; 2162 2163 errout_tmplt: 2164 kfree(tmplt); 2165 errout_tb: 2166 kfree(tb); 2167 return ERR_PTR(err); 2168 } 2169 2170 static void fl_tmplt_destroy(void *tmplt_priv) 2171 { 2172 struct fl_flow_tmplt *tmplt = tmplt_priv; 2173 2174 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2175 kfree(tmplt); 2176 } 2177 2178 static int fl_dump_key_val(struct sk_buff *skb, 2179 void *val, int val_type, 2180 void *mask, int mask_type, int len) 2181 { 2182 int err; 2183 2184 if (!memchr_inv(mask, 0, len)) 2185 return 0; 2186 err = nla_put(skb, val_type, len, val); 2187 if (err) 2188 return err; 2189 if (mask_type != TCA_FLOWER_UNSPEC) { 2190 err = nla_put(skb, mask_type, len, mask); 2191 if (err) 2192 return err; 2193 } 2194 return 0; 2195 } 2196 2197 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2198 struct fl_flow_key *mask) 2199 { 2200 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2201 TCA_FLOWER_KEY_PORT_DST_MIN, 2202 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2203 sizeof(key->tp_range.tp_min.dst)) || 2204 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2205 TCA_FLOWER_KEY_PORT_DST_MAX, 2206 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2207 sizeof(key->tp_range.tp_max.dst)) || 2208 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2209 TCA_FLOWER_KEY_PORT_SRC_MIN, 2210 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2211 sizeof(key->tp_range.tp_min.src)) || 2212 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2213 TCA_FLOWER_KEY_PORT_SRC_MAX, 2214 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2215 sizeof(key->tp_range.tp_max.src))) 2216 return -1; 2217 2218 return 0; 2219 } 2220 2221 static int fl_dump_key_mpls(struct sk_buff *skb, 2222 struct flow_dissector_key_mpls *mpls_key, 2223 struct flow_dissector_key_mpls *mpls_mask) 2224 { 2225 int err; 2226 2227 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 2228 return 0; 2229 if (mpls_mask->mpls_ttl) { 2230 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2231 mpls_key->mpls_ttl); 2232 if (err) 2233 return err; 2234 } 2235 if (mpls_mask->mpls_tc) { 2236 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2237 mpls_key->mpls_tc); 2238 if (err) 2239 return err; 2240 } 2241 if (mpls_mask->mpls_label) { 2242 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2243 mpls_key->mpls_label); 2244 if (err) 2245 return err; 2246 } 2247 if (mpls_mask->mpls_bos) { 2248 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2249 mpls_key->mpls_bos); 2250 if (err) 2251 return err; 2252 } 2253 return 0; 2254 } 2255 2256 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2257 struct flow_dissector_key_ip *key, 2258 struct flow_dissector_key_ip *mask) 2259 { 2260 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2261 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2262 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2263 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2264 2265 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2266 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2267 return -1; 2268 2269 return 0; 2270 } 2271 2272 static int fl_dump_key_vlan(struct sk_buff *skb, 2273 int vlan_id_key, int vlan_prio_key, 2274 struct flow_dissector_key_vlan *vlan_key, 2275 struct flow_dissector_key_vlan *vlan_mask) 2276 { 2277 int err; 2278 2279 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2280 return 0; 2281 if (vlan_mask->vlan_id) { 2282 err = nla_put_u16(skb, vlan_id_key, 2283 vlan_key->vlan_id); 2284 if (err) 2285 return err; 2286 } 2287 if (vlan_mask->vlan_priority) { 2288 err = nla_put_u8(skb, vlan_prio_key, 2289 vlan_key->vlan_priority); 2290 if (err) 2291 return err; 2292 } 2293 return 0; 2294 } 2295 2296 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2297 u32 *flower_key, u32 *flower_mask, 2298 u32 flower_flag_bit, u32 dissector_flag_bit) 2299 { 2300 if (dissector_mask & dissector_flag_bit) { 2301 *flower_mask |= flower_flag_bit; 2302 if (dissector_key & dissector_flag_bit) 2303 *flower_key |= flower_flag_bit; 2304 } 2305 } 2306 2307 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2308 { 2309 u32 key, mask; 2310 __be32 _key, _mask; 2311 int err; 2312 2313 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2314 return 0; 2315 2316 key = 0; 2317 mask = 0; 2318 2319 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2320 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2321 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2322 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2323 FLOW_DIS_FIRST_FRAG); 2324 2325 _key = cpu_to_be32(key); 2326 _mask = cpu_to_be32(mask); 2327 2328 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2329 if (err) 2330 return err; 2331 2332 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2333 } 2334 2335 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2336 struct flow_dissector_key_enc_opts *enc_opts) 2337 { 2338 struct geneve_opt *opt; 2339 struct nlattr *nest; 2340 int opt_off = 0; 2341 2342 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2343 if (!nest) 2344 goto nla_put_failure; 2345 2346 while (enc_opts->len > opt_off) { 2347 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2348 2349 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2350 opt->opt_class)) 2351 goto nla_put_failure; 2352 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2353 opt->type)) 2354 goto nla_put_failure; 2355 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2356 opt->length * 4, opt->opt_data)) 2357 goto nla_put_failure; 2358 2359 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2360 } 2361 nla_nest_end(skb, nest); 2362 return 0; 2363 2364 nla_put_failure: 2365 nla_nest_cancel(skb, nest); 2366 return -EMSGSIZE; 2367 } 2368 2369 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2370 struct flow_dissector_key_enc_opts *enc_opts) 2371 { 2372 struct vxlan_metadata *md; 2373 struct nlattr *nest; 2374 2375 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2376 if (!nest) 2377 goto nla_put_failure; 2378 2379 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2380 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2381 goto nla_put_failure; 2382 2383 nla_nest_end(skb, nest); 2384 return 0; 2385 2386 nla_put_failure: 2387 nla_nest_cancel(skb, nest); 2388 return -EMSGSIZE; 2389 } 2390 2391 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2392 struct flow_dissector_key_enc_opts *enc_opts) 2393 { 2394 struct erspan_metadata *md; 2395 struct nlattr *nest; 2396 2397 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2398 if (!nest) 2399 goto nla_put_failure; 2400 2401 md = (struct erspan_metadata *)&enc_opts->data[0]; 2402 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2403 goto nla_put_failure; 2404 2405 if (md->version == 1 && 2406 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2407 goto nla_put_failure; 2408 2409 if (md->version == 2 && 2410 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2411 md->u.md2.dir) || 2412 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2413 get_hwid(&md->u.md2)))) 2414 goto nla_put_failure; 2415 2416 nla_nest_end(skb, nest); 2417 return 0; 2418 2419 nla_put_failure: 2420 nla_nest_cancel(skb, nest); 2421 return -EMSGSIZE; 2422 } 2423 2424 static int fl_dump_key_ct(struct sk_buff *skb, 2425 struct flow_dissector_key_ct *key, 2426 struct flow_dissector_key_ct *mask) 2427 { 2428 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2429 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2430 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2431 sizeof(key->ct_state))) 2432 goto nla_put_failure; 2433 2434 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2435 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2436 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2437 sizeof(key->ct_zone))) 2438 goto nla_put_failure; 2439 2440 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2441 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2442 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2443 sizeof(key->ct_mark))) 2444 goto nla_put_failure; 2445 2446 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2447 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2448 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2449 sizeof(key->ct_labels))) 2450 goto nla_put_failure; 2451 2452 return 0; 2453 2454 nla_put_failure: 2455 return -EMSGSIZE; 2456 } 2457 2458 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2459 struct flow_dissector_key_enc_opts *enc_opts) 2460 { 2461 struct nlattr *nest; 2462 int err; 2463 2464 if (!enc_opts->len) 2465 return 0; 2466 2467 nest = nla_nest_start_noflag(skb, enc_opt_type); 2468 if (!nest) 2469 goto nla_put_failure; 2470 2471 switch (enc_opts->dst_opt_type) { 2472 case TUNNEL_GENEVE_OPT: 2473 err = fl_dump_key_geneve_opt(skb, enc_opts); 2474 if (err) 2475 goto nla_put_failure; 2476 break; 2477 case TUNNEL_VXLAN_OPT: 2478 err = fl_dump_key_vxlan_opt(skb, enc_opts); 2479 if (err) 2480 goto nla_put_failure; 2481 break; 2482 case TUNNEL_ERSPAN_OPT: 2483 err = fl_dump_key_erspan_opt(skb, enc_opts); 2484 if (err) 2485 goto nla_put_failure; 2486 break; 2487 default: 2488 goto nla_put_failure; 2489 } 2490 nla_nest_end(skb, nest); 2491 return 0; 2492 2493 nla_put_failure: 2494 nla_nest_cancel(skb, nest); 2495 return -EMSGSIZE; 2496 } 2497 2498 static int fl_dump_key_enc_opt(struct sk_buff *skb, 2499 struct flow_dissector_key_enc_opts *key_opts, 2500 struct flow_dissector_key_enc_opts *msk_opts) 2501 { 2502 int err; 2503 2504 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2505 if (err) 2506 return err; 2507 2508 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2509 } 2510 2511 static int fl_dump_key(struct sk_buff *skb, struct net *net, 2512 struct fl_flow_key *key, struct fl_flow_key *mask) 2513 { 2514 if (mask->meta.ingress_ifindex) { 2515 struct net_device *dev; 2516 2517 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 2518 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2519 goto nla_put_failure; 2520 } 2521 2522 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2523 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2524 sizeof(key->eth.dst)) || 2525 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2526 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2527 sizeof(key->eth.src)) || 2528 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2529 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2530 sizeof(key->basic.n_proto))) 2531 goto nla_put_failure; 2532 2533 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2534 goto nla_put_failure; 2535 2536 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 2537 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 2538 goto nla_put_failure; 2539 2540 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 2541 TCA_FLOWER_KEY_CVLAN_PRIO, 2542 &key->cvlan, &mask->cvlan) || 2543 (mask->cvlan.vlan_tpid && 2544 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2545 key->cvlan.vlan_tpid))) 2546 goto nla_put_failure; 2547 2548 if (mask->basic.n_proto) { 2549 if (mask->cvlan.vlan_tpid) { 2550 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 2551 key->basic.n_proto)) 2552 goto nla_put_failure; 2553 } else if (mask->vlan.vlan_tpid) { 2554 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2555 key->basic.n_proto)) 2556 goto nla_put_failure; 2557 } 2558 } 2559 2560 if ((key->basic.n_proto == htons(ETH_P_IP) || 2561 key->basic.n_proto == htons(ETH_P_IPV6)) && 2562 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 2563 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 2564 sizeof(key->basic.ip_proto)) || 2565 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 2566 goto nla_put_failure; 2567 2568 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2569 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 2570 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 2571 sizeof(key->ipv4.src)) || 2572 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 2573 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 2574 sizeof(key->ipv4.dst)))) 2575 goto nla_put_failure; 2576 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2577 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 2578 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 2579 sizeof(key->ipv6.src)) || 2580 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 2581 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 2582 sizeof(key->ipv6.dst)))) 2583 goto nla_put_failure; 2584 2585 if (key->basic.ip_proto == IPPROTO_TCP && 2586 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 2587 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 2588 sizeof(key->tp.src)) || 2589 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 2590 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 2591 sizeof(key->tp.dst)) || 2592 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 2593 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 2594 sizeof(key->tcp.flags)))) 2595 goto nla_put_failure; 2596 else if (key->basic.ip_proto == IPPROTO_UDP && 2597 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2598 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2599 sizeof(key->tp.src)) || 2600 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2601 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2602 sizeof(key->tp.dst)))) 2603 goto nla_put_failure; 2604 else if (key->basic.ip_proto == IPPROTO_SCTP && 2605 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2606 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2607 sizeof(key->tp.src)) || 2608 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2609 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2610 sizeof(key->tp.dst)))) 2611 goto nla_put_failure; 2612 else if (key->basic.n_proto == htons(ETH_P_IP) && 2613 key->basic.ip_proto == IPPROTO_ICMP && 2614 (fl_dump_key_val(skb, &key->icmp.type, 2615 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 2616 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2617 sizeof(key->icmp.type)) || 2618 fl_dump_key_val(skb, &key->icmp.code, 2619 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 2620 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2621 sizeof(key->icmp.code)))) 2622 goto nla_put_failure; 2623 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2624 key->basic.ip_proto == IPPROTO_ICMPV6 && 2625 (fl_dump_key_val(skb, &key->icmp.type, 2626 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 2627 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2628 sizeof(key->icmp.type)) || 2629 fl_dump_key_val(skb, &key->icmp.code, 2630 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 2631 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2632 sizeof(key->icmp.code)))) 2633 goto nla_put_failure; 2634 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 2635 key->basic.n_proto == htons(ETH_P_RARP)) && 2636 (fl_dump_key_val(skb, &key->arp.sip, 2637 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 2638 TCA_FLOWER_KEY_ARP_SIP_MASK, 2639 sizeof(key->arp.sip)) || 2640 fl_dump_key_val(skb, &key->arp.tip, 2641 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 2642 TCA_FLOWER_KEY_ARP_TIP_MASK, 2643 sizeof(key->arp.tip)) || 2644 fl_dump_key_val(skb, &key->arp.op, 2645 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 2646 TCA_FLOWER_KEY_ARP_OP_MASK, 2647 sizeof(key->arp.op)) || 2648 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2649 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2650 sizeof(key->arp.sha)) || 2651 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2652 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2653 sizeof(key->arp.tha)))) 2654 goto nla_put_failure; 2655 2656 if ((key->basic.ip_proto == IPPROTO_TCP || 2657 key->basic.ip_proto == IPPROTO_UDP || 2658 key->basic.ip_proto == IPPROTO_SCTP) && 2659 fl_dump_key_port_range(skb, key, mask)) 2660 goto nla_put_failure; 2661 2662 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2663 (fl_dump_key_val(skb, &key->enc_ipv4.src, 2664 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 2665 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2666 sizeof(key->enc_ipv4.src)) || 2667 fl_dump_key_val(skb, &key->enc_ipv4.dst, 2668 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 2669 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2670 sizeof(key->enc_ipv4.dst)))) 2671 goto nla_put_failure; 2672 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2673 (fl_dump_key_val(skb, &key->enc_ipv6.src, 2674 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 2675 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2676 sizeof(key->enc_ipv6.src)) || 2677 fl_dump_key_val(skb, &key->enc_ipv6.dst, 2678 TCA_FLOWER_KEY_ENC_IPV6_DST, 2679 &mask->enc_ipv6.dst, 2680 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2681 sizeof(key->enc_ipv6.dst)))) 2682 goto nla_put_failure; 2683 2684 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 2685 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 2686 sizeof(key->enc_key_id)) || 2687 fl_dump_key_val(skb, &key->enc_tp.src, 2688 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2689 &mask->enc_tp.src, 2690 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2691 sizeof(key->enc_tp.src)) || 2692 fl_dump_key_val(skb, &key->enc_tp.dst, 2693 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2694 &mask->enc_tp.dst, 2695 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2696 sizeof(key->enc_tp.dst)) || 2697 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 2698 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 2699 goto nla_put_failure; 2700 2701 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 2702 goto nla_put_failure; 2703 2704 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 2705 goto nla_put_failure; 2706 2707 return 0; 2708 2709 nla_put_failure: 2710 return -EMSGSIZE; 2711 } 2712 2713 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 2714 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 2715 { 2716 struct cls_fl_filter *f = fh; 2717 struct nlattr *nest; 2718 struct fl_flow_key *key, *mask; 2719 bool skip_hw; 2720 2721 if (!f) 2722 return skb->len; 2723 2724 t->tcm_handle = f->handle; 2725 2726 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2727 if (!nest) 2728 goto nla_put_failure; 2729 2730 spin_lock(&tp->lock); 2731 2732 if (f->res.classid && 2733 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 2734 goto nla_put_failure_locked; 2735 2736 key = &f->key; 2737 mask = &f->mask->key; 2738 skip_hw = tc_skip_hw(f->flags); 2739 2740 if (fl_dump_key(skb, net, key, mask)) 2741 goto nla_put_failure_locked; 2742 2743 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 2744 goto nla_put_failure_locked; 2745 2746 spin_unlock(&tp->lock); 2747 2748 if (!skip_hw) 2749 fl_hw_update_stats(tp, f, rtnl_held); 2750 2751 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 2752 goto nla_put_failure; 2753 2754 if (tcf_exts_dump(skb, &f->exts)) 2755 goto nla_put_failure; 2756 2757 nla_nest_end(skb, nest); 2758 2759 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 2760 goto nla_put_failure; 2761 2762 return skb->len; 2763 2764 nla_put_failure_locked: 2765 spin_unlock(&tp->lock); 2766 nla_put_failure: 2767 nla_nest_cancel(skb, nest); 2768 return -1; 2769 } 2770 2771 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 2772 { 2773 struct fl_flow_tmplt *tmplt = tmplt_priv; 2774 struct fl_flow_key *key, *mask; 2775 struct nlattr *nest; 2776 2777 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2778 if (!nest) 2779 goto nla_put_failure; 2780 2781 key = &tmplt->dummy_key; 2782 mask = &tmplt->mask; 2783 2784 if (fl_dump_key(skb, net, key, mask)) 2785 goto nla_put_failure; 2786 2787 nla_nest_end(skb, nest); 2788 2789 return skb->len; 2790 2791 nla_put_failure: 2792 nla_nest_cancel(skb, nest); 2793 return -EMSGSIZE; 2794 } 2795 2796 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 2797 unsigned long base) 2798 { 2799 struct cls_fl_filter *f = fh; 2800 2801 if (f && f->res.classid == classid) { 2802 if (cl) 2803 __tcf_bind_filter(q, &f->res, base); 2804 else 2805 __tcf_unbind_filter(q, &f->res); 2806 } 2807 } 2808 2809 static bool fl_delete_empty(struct tcf_proto *tp) 2810 { 2811 struct cls_fl_head *head = fl_head_dereference(tp); 2812 2813 spin_lock(&tp->lock); 2814 tp->deleting = idr_is_empty(&head->handle_idr); 2815 spin_unlock(&tp->lock); 2816 2817 return tp->deleting; 2818 } 2819 2820 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 2821 .kind = "flower", 2822 .classify = fl_classify, 2823 .init = fl_init, 2824 .destroy = fl_destroy, 2825 .get = fl_get, 2826 .put = fl_put, 2827 .change = fl_change, 2828 .delete = fl_delete, 2829 .delete_empty = fl_delete_empty, 2830 .walk = fl_walk, 2831 .reoffload = fl_reoffload, 2832 .hw_add = fl_hw_add, 2833 .hw_del = fl_hw_del, 2834 .dump = fl_dump, 2835 .bind_class = fl_bind_class, 2836 .tmplt_create = fl_tmplt_create, 2837 .tmplt_destroy = fl_tmplt_destroy, 2838 .tmplt_dump = fl_tmplt_dump, 2839 .owner = THIS_MODULE, 2840 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 2841 }; 2842 2843 static int __init cls_fl_init(void) 2844 { 2845 return register_tcf_proto_ops(&cls_fl_ops); 2846 } 2847 2848 static void __exit cls_fl_exit(void) 2849 { 2850 unregister_tcf_proto_ops(&cls_fl_ops); 2851 } 2852 2853 module_init(cls_fl_init); 2854 module_exit(cls_fl_exit); 2855 2856 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 2857 MODULE_DESCRIPTION("Flower classifier"); 2858 MODULE_LICENSE("GPL v2"); 2859