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 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 1022 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1023 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1024 sizeof(key->eth.dst)); 1025 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1026 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1027 sizeof(key->eth.src)); 1028 1029 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1030 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1031 1032 if (eth_type_vlan(ethertype)) { 1033 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1034 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 1035 &mask->vlan); 1036 1037 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1038 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1039 if (eth_type_vlan(ethertype)) { 1040 fl_set_key_vlan(tb, ethertype, 1041 TCA_FLOWER_KEY_CVLAN_ID, 1042 TCA_FLOWER_KEY_CVLAN_PRIO, 1043 &key->cvlan, &mask->cvlan); 1044 fl_set_key_val(tb, &key->basic.n_proto, 1045 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1046 &mask->basic.n_proto, 1047 TCA_FLOWER_UNSPEC, 1048 sizeof(key->basic.n_proto)); 1049 } else { 1050 key->basic.n_proto = ethertype; 1051 mask->basic.n_proto = cpu_to_be16(~0); 1052 } 1053 } 1054 } else { 1055 key->basic.n_proto = ethertype; 1056 mask->basic.n_proto = cpu_to_be16(~0); 1057 } 1058 } 1059 1060 if (key->basic.n_proto == htons(ETH_P_IP) || 1061 key->basic.n_proto == htons(ETH_P_IPV6)) { 1062 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1063 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1064 sizeof(key->basic.ip_proto)); 1065 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1066 } 1067 1068 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1069 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1070 mask->control.addr_type = ~0; 1071 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1072 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1073 sizeof(key->ipv4.src)); 1074 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1075 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1076 sizeof(key->ipv4.dst)); 1077 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1078 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1079 mask->control.addr_type = ~0; 1080 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1081 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1082 sizeof(key->ipv6.src)); 1083 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1084 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1085 sizeof(key->ipv6.dst)); 1086 } 1087 1088 if (key->basic.ip_proto == IPPROTO_TCP) { 1089 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1090 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1091 sizeof(key->tp.src)); 1092 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1093 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1094 sizeof(key->tp.dst)); 1095 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1096 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1097 sizeof(key->tcp.flags)); 1098 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1099 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1100 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1101 sizeof(key->tp.src)); 1102 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1103 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1104 sizeof(key->tp.dst)); 1105 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1106 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1107 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1108 sizeof(key->tp.src)); 1109 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1110 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1111 sizeof(key->tp.dst)); 1112 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1113 key->basic.ip_proto == IPPROTO_ICMP) { 1114 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1115 &mask->icmp.type, 1116 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1117 sizeof(key->icmp.type)); 1118 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1119 &mask->icmp.code, 1120 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1121 sizeof(key->icmp.code)); 1122 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1123 key->basic.ip_proto == IPPROTO_ICMPV6) { 1124 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1125 &mask->icmp.type, 1126 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1127 sizeof(key->icmp.type)); 1128 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1129 &mask->icmp.code, 1130 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1131 sizeof(key->icmp.code)); 1132 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1133 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1134 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 1135 if (ret) 1136 return ret; 1137 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1138 key->basic.n_proto == htons(ETH_P_RARP)) { 1139 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1140 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1141 sizeof(key->arp.sip)); 1142 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1143 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1144 sizeof(key->arp.tip)); 1145 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1146 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1147 sizeof(key->arp.op)); 1148 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1149 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1150 sizeof(key->arp.sha)); 1151 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1152 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1153 sizeof(key->arp.tha)); 1154 } 1155 1156 if (key->basic.ip_proto == IPPROTO_TCP || 1157 key->basic.ip_proto == IPPROTO_UDP || 1158 key->basic.ip_proto == IPPROTO_SCTP) { 1159 ret = fl_set_key_port_range(tb, key, mask); 1160 if (ret) 1161 return ret; 1162 } 1163 1164 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1165 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1166 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1167 mask->enc_control.addr_type = ~0; 1168 fl_set_key_val(tb, &key->enc_ipv4.src, 1169 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1170 &mask->enc_ipv4.src, 1171 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1172 sizeof(key->enc_ipv4.src)); 1173 fl_set_key_val(tb, &key->enc_ipv4.dst, 1174 TCA_FLOWER_KEY_ENC_IPV4_DST, 1175 &mask->enc_ipv4.dst, 1176 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1177 sizeof(key->enc_ipv4.dst)); 1178 } 1179 1180 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1181 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1182 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1183 mask->enc_control.addr_type = ~0; 1184 fl_set_key_val(tb, &key->enc_ipv6.src, 1185 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1186 &mask->enc_ipv6.src, 1187 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1188 sizeof(key->enc_ipv6.src)); 1189 fl_set_key_val(tb, &key->enc_ipv6.dst, 1190 TCA_FLOWER_KEY_ENC_IPV6_DST, 1191 &mask->enc_ipv6.dst, 1192 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1193 sizeof(key->enc_ipv6.dst)); 1194 } 1195 1196 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1197 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1198 sizeof(key->enc_key_id.keyid)); 1199 1200 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1201 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1202 sizeof(key->enc_tp.src)); 1203 1204 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1205 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1206 sizeof(key->enc_tp.dst)); 1207 1208 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1209 1210 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1211 ret = fl_set_enc_opt(tb, key, mask, extack); 1212 if (ret) 1213 return ret; 1214 } 1215 1216 if (tb[TCA_FLOWER_KEY_FLAGS]) 1217 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 1218 1219 return ret; 1220 } 1221 1222 static void fl_mask_copy(struct fl_flow_mask *dst, 1223 struct fl_flow_mask *src) 1224 { 1225 const void *psrc = fl_key_get_start(&src->key, src); 1226 void *pdst = fl_key_get_start(&dst->key, src); 1227 1228 memcpy(pdst, psrc, fl_mask_range(src)); 1229 dst->range = src->range; 1230 } 1231 1232 static const struct rhashtable_params fl_ht_params = { 1233 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1234 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1235 .automatic_shrinking = true, 1236 }; 1237 1238 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1239 { 1240 mask->filter_ht_params = fl_ht_params; 1241 mask->filter_ht_params.key_len = fl_mask_range(mask); 1242 mask->filter_ht_params.key_offset += mask->range.start; 1243 1244 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1245 } 1246 1247 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1248 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member) 1249 1250 #define FL_KEY_IS_MASKED(mask, member) \ 1251 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1252 0, FL_KEY_MEMBER_SIZE(member)) \ 1253 1254 #define FL_KEY_SET(keys, cnt, id, member) \ 1255 do { \ 1256 keys[cnt].key_id = id; \ 1257 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1258 cnt++; \ 1259 } while(0); 1260 1261 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1262 do { \ 1263 if (FL_KEY_IS_MASKED(mask, member)) \ 1264 FL_KEY_SET(keys, cnt, id, member); \ 1265 } while(0); 1266 1267 static void fl_init_dissector(struct flow_dissector *dissector, 1268 struct fl_flow_key *mask) 1269 { 1270 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1271 size_t cnt = 0; 1272 1273 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1274 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1275 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1276 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1277 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1278 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1279 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1280 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1281 if (FL_KEY_IS_MASKED(mask, tp) || 1282 FL_KEY_IS_MASKED(mask, tp_min) || FL_KEY_IS_MASKED(mask, tp_max)) 1283 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp); 1284 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1285 FLOW_DISSECTOR_KEY_IP, ip); 1286 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1287 FLOW_DISSECTOR_KEY_TCP, tcp); 1288 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1289 FLOW_DISSECTOR_KEY_ICMP, icmp); 1290 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1291 FLOW_DISSECTOR_KEY_ARP, arp); 1292 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1293 FLOW_DISSECTOR_KEY_MPLS, mpls); 1294 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1295 FLOW_DISSECTOR_KEY_VLAN, vlan); 1296 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1297 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1298 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1299 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1300 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1301 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1302 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1303 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1304 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1305 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1306 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1307 enc_control); 1308 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1309 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1310 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1311 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1312 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1313 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1314 1315 skb_flow_dissector_init(dissector, keys, cnt); 1316 } 1317 1318 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1319 struct fl_flow_mask *mask) 1320 { 1321 struct fl_flow_mask *newmask; 1322 int err; 1323 1324 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1325 if (!newmask) 1326 return ERR_PTR(-ENOMEM); 1327 1328 fl_mask_copy(newmask, mask); 1329 1330 if ((newmask->key.tp_min.dst && newmask->key.tp_max.dst) || 1331 (newmask->key.tp_min.src && newmask->key.tp_max.src)) 1332 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1333 1334 err = fl_init_mask_hashtable(newmask); 1335 if (err) 1336 goto errout_free; 1337 1338 fl_init_dissector(&newmask->dissector, &newmask->key); 1339 1340 INIT_LIST_HEAD_RCU(&newmask->filters); 1341 1342 refcount_set(&newmask->refcnt, 1); 1343 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1344 &newmask->ht_node, mask_ht_params); 1345 if (err) 1346 goto errout_destroy; 1347 1348 /* Wait until any potential concurrent users of mask are finished */ 1349 synchronize_rcu(); 1350 1351 spin_lock(&head->masks_lock); 1352 list_add_tail_rcu(&newmask->list, &head->masks); 1353 spin_unlock(&head->masks_lock); 1354 1355 return newmask; 1356 1357 errout_destroy: 1358 rhashtable_destroy(&newmask->ht); 1359 errout_free: 1360 kfree(newmask); 1361 1362 return ERR_PTR(err); 1363 } 1364 1365 static int fl_check_assign_mask(struct cls_fl_head *head, 1366 struct cls_fl_filter *fnew, 1367 struct cls_fl_filter *fold, 1368 struct fl_flow_mask *mask) 1369 { 1370 struct fl_flow_mask *newmask; 1371 int ret = 0; 1372 1373 rcu_read_lock(); 1374 1375 /* Insert mask as temporary node to prevent concurrent creation of mask 1376 * with same key. Any concurrent lookups with same key will return 1377 * -EAGAIN because mask's refcnt is zero. It is safe to insert 1378 * stack-allocated 'mask' to masks hash table because we call 1379 * synchronize_rcu() before returning from this function (either in case 1380 * of error or after replacing it with heap-allocated mask in 1381 * fl_create_new_mask()). 1382 */ 1383 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1384 &mask->ht_node, 1385 mask_ht_params); 1386 if (!fnew->mask) { 1387 rcu_read_unlock(); 1388 1389 if (fold) { 1390 ret = -EINVAL; 1391 goto errout_cleanup; 1392 } 1393 1394 newmask = fl_create_new_mask(head, mask); 1395 if (IS_ERR(newmask)) { 1396 ret = PTR_ERR(newmask); 1397 goto errout_cleanup; 1398 } 1399 1400 fnew->mask = newmask; 1401 return 0; 1402 } else if (IS_ERR(fnew->mask)) { 1403 ret = PTR_ERR(fnew->mask); 1404 } else if (fold && fold->mask != fnew->mask) { 1405 ret = -EINVAL; 1406 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1407 /* Mask was deleted concurrently, try again */ 1408 ret = -EAGAIN; 1409 } 1410 rcu_read_unlock(); 1411 return ret; 1412 1413 errout_cleanup: 1414 rhashtable_remove_fast(&head->ht, &mask->ht_node, 1415 mask_ht_params); 1416 /* Wait until any potential concurrent users of mask are finished */ 1417 synchronize_rcu(); 1418 return ret; 1419 } 1420 1421 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1422 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1423 unsigned long base, struct nlattr **tb, 1424 struct nlattr *est, bool ovr, 1425 struct fl_flow_tmplt *tmplt, bool rtnl_held, 1426 struct netlink_ext_ack *extack) 1427 { 1428 int err; 1429 1430 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held, 1431 extack); 1432 if (err < 0) 1433 return err; 1434 1435 if (tb[TCA_FLOWER_CLASSID]) { 1436 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1437 if (!rtnl_held) 1438 rtnl_lock(); 1439 tcf_bind_filter(tp, &f->res, base); 1440 if (!rtnl_held) 1441 rtnl_unlock(); 1442 } 1443 1444 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1445 if (err) 1446 return err; 1447 1448 fl_mask_update_range(mask); 1449 fl_set_masked_key(&f->mkey, &f->key, mask); 1450 1451 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1452 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1453 return -EINVAL; 1454 } 1455 1456 return 0; 1457 } 1458 1459 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 1460 struct cls_fl_filter *fold, 1461 bool *in_ht) 1462 { 1463 struct fl_flow_mask *mask = fnew->mask; 1464 int err; 1465 1466 err = rhashtable_lookup_insert_fast(&mask->ht, 1467 &fnew->ht_node, 1468 mask->filter_ht_params); 1469 if (err) { 1470 *in_ht = false; 1471 /* It is okay if filter with same key exists when 1472 * overwriting. 1473 */ 1474 return fold && err == -EEXIST ? 0 : err; 1475 } 1476 1477 *in_ht = true; 1478 return 0; 1479 } 1480 1481 static int fl_change(struct net *net, struct sk_buff *in_skb, 1482 struct tcf_proto *tp, unsigned long base, 1483 u32 handle, struct nlattr **tca, 1484 void **arg, bool ovr, bool rtnl_held, 1485 struct netlink_ext_ack *extack) 1486 { 1487 struct cls_fl_head *head = fl_head_dereference(tp); 1488 struct cls_fl_filter *fold = *arg; 1489 struct cls_fl_filter *fnew; 1490 struct fl_flow_mask *mask; 1491 struct nlattr **tb; 1492 bool in_ht; 1493 int err; 1494 1495 if (!tca[TCA_OPTIONS]) { 1496 err = -EINVAL; 1497 goto errout_fold; 1498 } 1499 1500 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1501 if (!mask) { 1502 err = -ENOBUFS; 1503 goto errout_fold; 1504 } 1505 1506 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1507 if (!tb) { 1508 err = -ENOBUFS; 1509 goto errout_mask_alloc; 1510 } 1511 1512 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1513 tca[TCA_OPTIONS], fl_policy, NULL); 1514 if (err < 0) 1515 goto errout_tb; 1516 1517 if (fold && handle && fold->handle != handle) { 1518 err = -EINVAL; 1519 goto errout_tb; 1520 } 1521 1522 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1523 if (!fnew) { 1524 err = -ENOBUFS; 1525 goto errout_tb; 1526 } 1527 INIT_LIST_HEAD(&fnew->hw_list); 1528 refcount_set(&fnew->refcnt, 1); 1529 1530 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 1531 if (err < 0) 1532 goto errout; 1533 1534 if (tb[TCA_FLOWER_FLAGS]) { 1535 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1536 1537 if (!tc_flags_valid(fnew->flags)) { 1538 err = -EINVAL; 1539 goto errout; 1540 } 1541 } 1542 1543 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 1544 tp->chain->tmplt_priv, rtnl_held, extack); 1545 if (err) 1546 goto errout; 1547 1548 err = fl_check_assign_mask(head, fnew, fold, mask); 1549 if (err) 1550 goto errout; 1551 1552 err = fl_ht_insert_unique(fnew, fold, &in_ht); 1553 if (err) 1554 goto errout_mask; 1555 1556 if (!tc_skip_hw(fnew->flags)) { 1557 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 1558 if (err) 1559 goto errout_ht; 1560 } 1561 1562 if (!tc_in_hw(fnew->flags)) 1563 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1564 1565 spin_lock(&tp->lock); 1566 1567 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 1568 * proto again or create new one, if necessary. 1569 */ 1570 if (tp->deleting) { 1571 err = -EAGAIN; 1572 goto errout_hw; 1573 } 1574 1575 if (fold) { 1576 /* Fold filter was deleted concurrently. Retry lookup. */ 1577 if (fold->deleted) { 1578 err = -EAGAIN; 1579 goto errout_hw; 1580 } 1581 1582 fnew->handle = handle; 1583 1584 if (!in_ht) { 1585 struct rhashtable_params params = 1586 fnew->mask->filter_ht_params; 1587 1588 err = rhashtable_insert_fast(&fnew->mask->ht, 1589 &fnew->ht_node, 1590 params); 1591 if (err) 1592 goto errout_hw; 1593 in_ht = true; 1594 } 1595 1596 refcount_inc(&fnew->refcnt); 1597 rhashtable_remove_fast(&fold->mask->ht, 1598 &fold->ht_node, 1599 fold->mask->filter_ht_params); 1600 idr_replace(&head->handle_idr, fnew, fnew->handle); 1601 list_replace_rcu(&fold->list, &fnew->list); 1602 fold->deleted = true; 1603 1604 spin_unlock(&tp->lock); 1605 1606 fl_mask_put(head, fold->mask); 1607 if (!tc_skip_hw(fold->flags)) 1608 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 1609 tcf_unbind_filter(tp, &fold->res); 1610 /* Caller holds reference to fold, so refcnt is always > 0 1611 * after this. 1612 */ 1613 refcount_dec(&fold->refcnt); 1614 __fl_put(fold); 1615 } else { 1616 if (handle) { 1617 /* user specifies a handle and it doesn't exist */ 1618 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1619 handle, GFP_ATOMIC); 1620 1621 /* Filter with specified handle was concurrently 1622 * inserted after initial check in cls_api. This is not 1623 * necessarily an error if NLM_F_EXCL is not set in 1624 * message flags. Returning EAGAIN will cause cls_api to 1625 * try to update concurrently inserted rule. 1626 */ 1627 if (err == -ENOSPC) 1628 err = -EAGAIN; 1629 } else { 1630 handle = 1; 1631 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1632 INT_MAX, GFP_ATOMIC); 1633 } 1634 if (err) 1635 goto errout_hw; 1636 1637 refcount_inc(&fnew->refcnt); 1638 fnew->handle = handle; 1639 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1640 spin_unlock(&tp->lock); 1641 } 1642 1643 *arg = fnew; 1644 1645 kfree(tb); 1646 kfree(mask); 1647 return 0; 1648 1649 errout_ht: 1650 spin_lock(&tp->lock); 1651 errout_hw: 1652 fnew->deleted = true; 1653 spin_unlock(&tp->lock); 1654 if (!tc_skip_hw(fnew->flags)) 1655 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 1656 if (in_ht) 1657 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 1658 fnew->mask->filter_ht_params); 1659 errout_mask: 1660 fl_mask_put(head, fnew->mask); 1661 errout: 1662 __fl_put(fnew); 1663 errout_tb: 1664 kfree(tb); 1665 errout_mask_alloc: 1666 kfree(mask); 1667 errout_fold: 1668 if (fold) 1669 __fl_put(fold); 1670 return err; 1671 } 1672 1673 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1674 bool rtnl_held, struct netlink_ext_ack *extack) 1675 { 1676 struct cls_fl_head *head = fl_head_dereference(tp); 1677 struct cls_fl_filter *f = arg; 1678 bool last_on_mask; 1679 int err = 0; 1680 1681 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 1682 *last = list_empty(&head->masks); 1683 __fl_put(f); 1684 1685 return err; 1686 } 1687 1688 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 1689 bool rtnl_held) 1690 { 1691 struct cls_fl_filter *f; 1692 1693 arg->count = arg->skip; 1694 1695 while ((f = fl_get_next_filter(tp, &arg->cookie)) != NULL) { 1696 if (arg->fn(tp, f, arg) < 0) { 1697 __fl_put(f); 1698 arg->stop = 1; 1699 break; 1700 } 1701 __fl_put(f); 1702 arg->cookie++; 1703 arg->count++; 1704 } 1705 } 1706 1707 static struct cls_fl_filter * 1708 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 1709 { 1710 struct cls_fl_head *head = fl_head_dereference(tp); 1711 1712 spin_lock(&tp->lock); 1713 if (list_empty(&head->hw_filters)) { 1714 spin_unlock(&tp->lock); 1715 return NULL; 1716 } 1717 1718 if (!f) 1719 f = list_entry(&head->hw_filters, struct cls_fl_filter, 1720 hw_list); 1721 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 1722 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 1723 spin_unlock(&tp->lock); 1724 return f; 1725 } 1726 } 1727 1728 spin_unlock(&tp->lock); 1729 return NULL; 1730 } 1731 1732 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1733 void *cb_priv, struct netlink_ext_ack *extack) 1734 { 1735 struct tc_cls_flower_offload cls_flower = {}; 1736 struct tcf_block *block = tp->chain->block; 1737 struct cls_fl_filter *f = NULL; 1738 int err; 1739 1740 /* hw_filters list can only be changed by hw offload functions after 1741 * obtaining rtnl lock. Make sure it is not changed while reoffload is 1742 * iterating it. 1743 */ 1744 ASSERT_RTNL(); 1745 1746 while ((f = fl_get_next_hw_filter(tp, f, add))) { 1747 cls_flower.rule = 1748 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 1749 if (!cls_flower.rule) { 1750 __fl_put(f); 1751 return -ENOMEM; 1752 } 1753 1754 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 1755 extack); 1756 cls_flower.command = add ? 1757 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1758 cls_flower.cookie = (unsigned long)f; 1759 cls_flower.rule->match.dissector = &f->mask->dissector; 1760 cls_flower.rule->match.mask = &f->mask->key; 1761 cls_flower.rule->match.key = &f->mkey; 1762 1763 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 1764 if (err) { 1765 kfree(cls_flower.rule); 1766 if (tc_skip_sw(f->flags)) { 1767 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 1768 __fl_put(f); 1769 return err; 1770 } 1771 goto next_flow; 1772 } 1773 1774 cls_flower.classid = f->res.classid; 1775 1776 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1777 kfree(cls_flower.rule); 1778 1779 if (err) { 1780 if (add && tc_skip_sw(f->flags)) { 1781 __fl_put(f); 1782 return err; 1783 } 1784 goto next_flow; 1785 } 1786 1787 spin_lock(&tp->lock); 1788 tc_cls_offload_cnt_update(block, &f->in_hw_count, &f->flags, 1789 add); 1790 spin_unlock(&tp->lock); 1791 next_flow: 1792 __fl_put(f); 1793 } 1794 1795 return 0; 1796 } 1797 1798 static int fl_hw_create_tmplt(struct tcf_chain *chain, 1799 struct fl_flow_tmplt *tmplt) 1800 { 1801 struct tc_cls_flower_offload cls_flower = {}; 1802 struct tcf_block *block = chain->block; 1803 1804 cls_flower.rule = flow_rule_alloc(0); 1805 if (!cls_flower.rule) 1806 return -ENOMEM; 1807 1808 cls_flower.common.chain_index = chain->index; 1809 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1810 cls_flower.cookie = (unsigned long) tmplt; 1811 cls_flower.rule->match.dissector = &tmplt->dissector; 1812 cls_flower.rule->match.mask = &tmplt->mask; 1813 cls_flower.rule->match.key = &tmplt->dummy_key; 1814 1815 /* We don't care if driver (any of them) fails to handle this 1816 * call. It serves just as a hint for it. 1817 */ 1818 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1819 kfree(cls_flower.rule); 1820 1821 return 0; 1822 } 1823 1824 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1825 struct fl_flow_tmplt *tmplt) 1826 { 1827 struct tc_cls_flower_offload cls_flower = {}; 1828 struct tcf_block *block = chain->block; 1829 1830 cls_flower.common.chain_index = chain->index; 1831 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1832 cls_flower.cookie = (unsigned long) tmplt; 1833 1834 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1835 } 1836 1837 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1838 struct nlattr **tca, 1839 struct netlink_ext_ack *extack) 1840 { 1841 struct fl_flow_tmplt *tmplt; 1842 struct nlattr **tb; 1843 int err; 1844 1845 if (!tca[TCA_OPTIONS]) 1846 return ERR_PTR(-EINVAL); 1847 1848 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1849 if (!tb) 1850 return ERR_PTR(-ENOBUFS); 1851 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1852 tca[TCA_OPTIONS], fl_policy, NULL); 1853 if (err) 1854 goto errout_tb; 1855 1856 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1857 if (!tmplt) { 1858 err = -ENOMEM; 1859 goto errout_tb; 1860 } 1861 tmplt->chain = chain; 1862 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1863 if (err) 1864 goto errout_tmplt; 1865 1866 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1867 1868 err = fl_hw_create_tmplt(chain, tmplt); 1869 if (err) 1870 goto errout_tmplt; 1871 1872 kfree(tb); 1873 return tmplt; 1874 1875 errout_tmplt: 1876 kfree(tmplt); 1877 errout_tb: 1878 kfree(tb); 1879 return ERR_PTR(err); 1880 } 1881 1882 static void fl_tmplt_destroy(void *tmplt_priv) 1883 { 1884 struct fl_flow_tmplt *tmplt = tmplt_priv; 1885 1886 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1887 kfree(tmplt); 1888 } 1889 1890 static int fl_dump_key_val(struct sk_buff *skb, 1891 void *val, int val_type, 1892 void *mask, int mask_type, int len) 1893 { 1894 int err; 1895 1896 if (!memchr_inv(mask, 0, len)) 1897 return 0; 1898 err = nla_put(skb, val_type, len, val); 1899 if (err) 1900 return err; 1901 if (mask_type != TCA_FLOWER_UNSPEC) { 1902 err = nla_put(skb, mask_type, len, mask); 1903 if (err) 1904 return err; 1905 } 1906 return 0; 1907 } 1908 1909 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 1910 struct fl_flow_key *mask) 1911 { 1912 if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN, 1913 &mask->tp_min.dst, TCA_FLOWER_UNSPEC, 1914 sizeof(key->tp_min.dst)) || 1915 fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX, 1916 &mask->tp_max.dst, TCA_FLOWER_UNSPEC, 1917 sizeof(key->tp_max.dst)) || 1918 fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN, 1919 &mask->tp_min.src, TCA_FLOWER_UNSPEC, 1920 sizeof(key->tp_min.src)) || 1921 fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX, 1922 &mask->tp_max.src, TCA_FLOWER_UNSPEC, 1923 sizeof(key->tp_max.src))) 1924 return -1; 1925 1926 return 0; 1927 } 1928 1929 static int fl_dump_key_mpls(struct sk_buff *skb, 1930 struct flow_dissector_key_mpls *mpls_key, 1931 struct flow_dissector_key_mpls *mpls_mask) 1932 { 1933 int err; 1934 1935 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1936 return 0; 1937 if (mpls_mask->mpls_ttl) { 1938 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1939 mpls_key->mpls_ttl); 1940 if (err) 1941 return err; 1942 } 1943 if (mpls_mask->mpls_tc) { 1944 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1945 mpls_key->mpls_tc); 1946 if (err) 1947 return err; 1948 } 1949 if (mpls_mask->mpls_label) { 1950 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1951 mpls_key->mpls_label); 1952 if (err) 1953 return err; 1954 } 1955 if (mpls_mask->mpls_bos) { 1956 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1957 mpls_key->mpls_bos); 1958 if (err) 1959 return err; 1960 } 1961 return 0; 1962 } 1963 1964 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1965 struct flow_dissector_key_ip *key, 1966 struct flow_dissector_key_ip *mask) 1967 { 1968 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1969 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1970 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1971 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1972 1973 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1974 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1975 return -1; 1976 1977 return 0; 1978 } 1979 1980 static int fl_dump_key_vlan(struct sk_buff *skb, 1981 int vlan_id_key, int vlan_prio_key, 1982 struct flow_dissector_key_vlan *vlan_key, 1983 struct flow_dissector_key_vlan *vlan_mask) 1984 { 1985 int err; 1986 1987 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1988 return 0; 1989 if (vlan_mask->vlan_id) { 1990 err = nla_put_u16(skb, vlan_id_key, 1991 vlan_key->vlan_id); 1992 if (err) 1993 return err; 1994 } 1995 if (vlan_mask->vlan_priority) { 1996 err = nla_put_u8(skb, vlan_prio_key, 1997 vlan_key->vlan_priority); 1998 if (err) 1999 return err; 2000 } 2001 return 0; 2002 } 2003 2004 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2005 u32 *flower_key, u32 *flower_mask, 2006 u32 flower_flag_bit, u32 dissector_flag_bit) 2007 { 2008 if (dissector_mask & dissector_flag_bit) { 2009 *flower_mask |= flower_flag_bit; 2010 if (dissector_key & dissector_flag_bit) 2011 *flower_key |= flower_flag_bit; 2012 } 2013 } 2014 2015 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2016 { 2017 u32 key, mask; 2018 __be32 _key, _mask; 2019 int err; 2020 2021 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2022 return 0; 2023 2024 key = 0; 2025 mask = 0; 2026 2027 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2028 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2029 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2030 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2031 FLOW_DIS_FIRST_FRAG); 2032 2033 _key = cpu_to_be32(key); 2034 _mask = cpu_to_be32(mask); 2035 2036 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2037 if (err) 2038 return err; 2039 2040 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2041 } 2042 2043 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2044 struct flow_dissector_key_enc_opts *enc_opts) 2045 { 2046 struct geneve_opt *opt; 2047 struct nlattr *nest; 2048 int opt_off = 0; 2049 2050 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2051 if (!nest) 2052 goto nla_put_failure; 2053 2054 while (enc_opts->len > opt_off) { 2055 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2056 2057 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2058 opt->opt_class)) 2059 goto nla_put_failure; 2060 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2061 opt->type)) 2062 goto nla_put_failure; 2063 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2064 opt->length * 4, opt->opt_data)) 2065 goto nla_put_failure; 2066 2067 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2068 } 2069 nla_nest_end(skb, nest); 2070 return 0; 2071 2072 nla_put_failure: 2073 nla_nest_cancel(skb, nest); 2074 return -EMSGSIZE; 2075 } 2076 2077 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2078 struct flow_dissector_key_enc_opts *enc_opts) 2079 { 2080 struct nlattr *nest; 2081 int err; 2082 2083 if (!enc_opts->len) 2084 return 0; 2085 2086 nest = nla_nest_start_noflag(skb, enc_opt_type); 2087 if (!nest) 2088 goto nla_put_failure; 2089 2090 switch (enc_opts->dst_opt_type) { 2091 case TUNNEL_GENEVE_OPT: 2092 err = fl_dump_key_geneve_opt(skb, enc_opts); 2093 if (err) 2094 goto nla_put_failure; 2095 break; 2096 default: 2097 goto nla_put_failure; 2098 } 2099 nla_nest_end(skb, nest); 2100 return 0; 2101 2102 nla_put_failure: 2103 nla_nest_cancel(skb, nest); 2104 return -EMSGSIZE; 2105 } 2106 2107 static int fl_dump_key_enc_opt(struct sk_buff *skb, 2108 struct flow_dissector_key_enc_opts *key_opts, 2109 struct flow_dissector_key_enc_opts *msk_opts) 2110 { 2111 int err; 2112 2113 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2114 if (err) 2115 return err; 2116 2117 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2118 } 2119 2120 static int fl_dump_key(struct sk_buff *skb, struct net *net, 2121 struct fl_flow_key *key, struct fl_flow_key *mask) 2122 { 2123 if (mask->indev_ifindex) { 2124 struct net_device *dev; 2125 2126 dev = __dev_get_by_index(net, key->indev_ifindex); 2127 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2128 goto nla_put_failure; 2129 } 2130 2131 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2132 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2133 sizeof(key->eth.dst)) || 2134 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2135 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2136 sizeof(key->eth.src)) || 2137 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2138 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2139 sizeof(key->basic.n_proto))) 2140 goto nla_put_failure; 2141 2142 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2143 goto nla_put_failure; 2144 2145 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 2146 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 2147 goto nla_put_failure; 2148 2149 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 2150 TCA_FLOWER_KEY_CVLAN_PRIO, 2151 &key->cvlan, &mask->cvlan) || 2152 (mask->cvlan.vlan_tpid && 2153 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2154 key->cvlan.vlan_tpid))) 2155 goto nla_put_failure; 2156 2157 if (mask->basic.n_proto) { 2158 if (mask->cvlan.vlan_tpid) { 2159 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 2160 key->basic.n_proto)) 2161 goto nla_put_failure; 2162 } else if (mask->vlan.vlan_tpid) { 2163 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2164 key->basic.n_proto)) 2165 goto nla_put_failure; 2166 } 2167 } 2168 2169 if ((key->basic.n_proto == htons(ETH_P_IP) || 2170 key->basic.n_proto == htons(ETH_P_IPV6)) && 2171 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 2172 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 2173 sizeof(key->basic.ip_proto)) || 2174 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 2175 goto nla_put_failure; 2176 2177 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2178 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 2179 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 2180 sizeof(key->ipv4.src)) || 2181 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 2182 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 2183 sizeof(key->ipv4.dst)))) 2184 goto nla_put_failure; 2185 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2186 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 2187 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 2188 sizeof(key->ipv6.src)) || 2189 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 2190 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 2191 sizeof(key->ipv6.dst)))) 2192 goto nla_put_failure; 2193 2194 if (key->basic.ip_proto == IPPROTO_TCP && 2195 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 2196 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 2197 sizeof(key->tp.src)) || 2198 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 2199 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 2200 sizeof(key->tp.dst)) || 2201 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 2202 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 2203 sizeof(key->tcp.flags)))) 2204 goto nla_put_failure; 2205 else if (key->basic.ip_proto == IPPROTO_UDP && 2206 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2207 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2208 sizeof(key->tp.src)) || 2209 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2210 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2211 sizeof(key->tp.dst)))) 2212 goto nla_put_failure; 2213 else if (key->basic.ip_proto == IPPROTO_SCTP && 2214 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2215 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2216 sizeof(key->tp.src)) || 2217 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2218 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2219 sizeof(key->tp.dst)))) 2220 goto nla_put_failure; 2221 else if (key->basic.n_proto == htons(ETH_P_IP) && 2222 key->basic.ip_proto == IPPROTO_ICMP && 2223 (fl_dump_key_val(skb, &key->icmp.type, 2224 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 2225 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2226 sizeof(key->icmp.type)) || 2227 fl_dump_key_val(skb, &key->icmp.code, 2228 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 2229 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2230 sizeof(key->icmp.code)))) 2231 goto nla_put_failure; 2232 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2233 key->basic.ip_proto == IPPROTO_ICMPV6 && 2234 (fl_dump_key_val(skb, &key->icmp.type, 2235 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 2236 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2237 sizeof(key->icmp.type)) || 2238 fl_dump_key_val(skb, &key->icmp.code, 2239 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 2240 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2241 sizeof(key->icmp.code)))) 2242 goto nla_put_failure; 2243 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 2244 key->basic.n_proto == htons(ETH_P_RARP)) && 2245 (fl_dump_key_val(skb, &key->arp.sip, 2246 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 2247 TCA_FLOWER_KEY_ARP_SIP_MASK, 2248 sizeof(key->arp.sip)) || 2249 fl_dump_key_val(skb, &key->arp.tip, 2250 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 2251 TCA_FLOWER_KEY_ARP_TIP_MASK, 2252 sizeof(key->arp.tip)) || 2253 fl_dump_key_val(skb, &key->arp.op, 2254 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 2255 TCA_FLOWER_KEY_ARP_OP_MASK, 2256 sizeof(key->arp.op)) || 2257 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2258 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2259 sizeof(key->arp.sha)) || 2260 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2261 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2262 sizeof(key->arp.tha)))) 2263 goto nla_put_failure; 2264 2265 if ((key->basic.ip_proto == IPPROTO_TCP || 2266 key->basic.ip_proto == IPPROTO_UDP || 2267 key->basic.ip_proto == IPPROTO_SCTP) && 2268 fl_dump_key_port_range(skb, key, mask)) 2269 goto nla_put_failure; 2270 2271 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2272 (fl_dump_key_val(skb, &key->enc_ipv4.src, 2273 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 2274 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2275 sizeof(key->enc_ipv4.src)) || 2276 fl_dump_key_val(skb, &key->enc_ipv4.dst, 2277 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 2278 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2279 sizeof(key->enc_ipv4.dst)))) 2280 goto nla_put_failure; 2281 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2282 (fl_dump_key_val(skb, &key->enc_ipv6.src, 2283 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 2284 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2285 sizeof(key->enc_ipv6.src)) || 2286 fl_dump_key_val(skb, &key->enc_ipv6.dst, 2287 TCA_FLOWER_KEY_ENC_IPV6_DST, 2288 &mask->enc_ipv6.dst, 2289 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2290 sizeof(key->enc_ipv6.dst)))) 2291 goto nla_put_failure; 2292 2293 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 2294 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 2295 sizeof(key->enc_key_id)) || 2296 fl_dump_key_val(skb, &key->enc_tp.src, 2297 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2298 &mask->enc_tp.src, 2299 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2300 sizeof(key->enc_tp.src)) || 2301 fl_dump_key_val(skb, &key->enc_tp.dst, 2302 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2303 &mask->enc_tp.dst, 2304 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2305 sizeof(key->enc_tp.dst)) || 2306 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 2307 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 2308 goto nla_put_failure; 2309 2310 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 2311 goto nla_put_failure; 2312 2313 return 0; 2314 2315 nla_put_failure: 2316 return -EMSGSIZE; 2317 } 2318 2319 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 2320 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 2321 { 2322 struct cls_fl_filter *f = fh; 2323 struct nlattr *nest; 2324 struct fl_flow_key *key, *mask; 2325 bool skip_hw; 2326 2327 if (!f) 2328 return skb->len; 2329 2330 t->tcm_handle = f->handle; 2331 2332 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2333 if (!nest) 2334 goto nla_put_failure; 2335 2336 spin_lock(&tp->lock); 2337 2338 if (f->res.classid && 2339 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 2340 goto nla_put_failure_locked; 2341 2342 key = &f->key; 2343 mask = &f->mask->key; 2344 skip_hw = tc_skip_hw(f->flags); 2345 2346 if (fl_dump_key(skb, net, key, mask)) 2347 goto nla_put_failure_locked; 2348 2349 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 2350 goto nla_put_failure_locked; 2351 2352 spin_unlock(&tp->lock); 2353 2354 if (!skip_hw) 2355 fl_hw_update_stats(tp, f, rtnl_held); 2356 2357 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 2358 goto nla_put_failure; 2359 2360 if (tcf_exts_dump(skb, &f->exts)) 2361 goto nla_put_failure; 2362 2363 nla_nest_end(skb, nest); 2364 2365 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 2366 goto nla_put_failure; 2367 2368 return skb->len; 2369 2370 nla_put_failure_locked: 2371 spin_unlock(&tp->lock); 2372 nla_put_failure: 2373 nla_nest_cancel(skb, nest); 2374 return -1; 2375 } 2376 2377 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 2378 { 2379 struct fl_flow_tmplt *tmplt = tmplt_priv; 2380 struct fl_flow_key *key, *mask; 2381 struct nlattr *nest; 2382 2383 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2384 if (!nest) 2385 goto nla_put_failure; 2386 2387 key = &tmplt->dummy_key; 2388 mask = &tmplt->mask; 2389 2390 if (fl_dump_key(skb, net, key, mask)) 2391 goto nla_put_failure; 2392 2393 nla_nest_end(skb, nest); 2394 2395 return skb->len; 2396 2397 nla_put_failure: 2398 nla_nest_cancel(skb, nest); 2399 return -EMSGSIZE; 2400 } 2401 2402 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 2403 { 2404 struct cls_fl_filter *f = fh; 2405 2406 if (f && f->res.classid == classid) 2407 f->res.class = cl; 2408 } 2409 2410 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 2411 .kind = "flower", 2412 .classify = fl_classify, 2413 .init = fl_init, 2414 .destroy = fl_destroy, 2415 .get = fl_get, 2416 .put = fl_put, 2417 .change = fl_change, 2418 .delete = fl_delete, 2419 .walk = fl_walk, 2420 .reoffload = fl_reoffload, 2421 .dump = fl_dump, 2422 .bind_class = fl_bind_class, 2423 .tmplt_create = fl_tmplt_create, 2424 .tmplt_destroy = fl_tmplt_destroy, 2425 .tmplt_dump = fl_tmplt_dump, 2426 .owner = THIS_MODULE, 2427 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 2428 }; 2429 2430 static int __init cls_fl_init(void) 2431 { 2432 return register_tcf_proto_ops(&cls_fl_ops); 2433 } 2434 2435 static void __exit cls_fl_exit(void) 2436 { 2437 unregister_tcf_proto_ops(&cls_fl_ops); 2438 } 2439 2440 module_init(cls_fl_init); 2441 module_exit(cls_fl_exit); 2442 2443 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 2444 MODULE_DESCRIPTION("Flower classifier"); 2445 MODULE_LICENSE("GPL v2"); 2446