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