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