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 struct flow_dissector_key_meta meta; 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_flow_dissect_meta(skb, &mask->dissector, &skb_key); 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, bool mask_init_done) 324 { 325 /* temporary masks don't have their filters list and ht initialized */ 326 if (mask_init_done) { 327 WARN_ON(!list_empty(&mask->filters)); 328 rhashtable_destroy(&mask->ht); 329 } 330 kfree(mask); 331 } 332 333 static void fl_mask_free_work(struct work_struct *work) 334 { 335 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 336 struct fl_flow_mask, rwork); 337 338 fl_mask_free(mask, true); 339 } 340 341 static void fl_uninit_mask_free_work(struct work_struct *work) 342 { 343 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 344 struct fl_flow_mask, rwork); 345 346 fl_mask_free(mask, false); 347 } 348 349 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 350 { 351 if (!refcount_dec_and_test(&mask->refcnt)) 352 return false; 353 354 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 355 356 spin_lock(&head->masks_lock); 357 list_del_rcu(&mask->list); 358 spin_unlock(&head->masks_lock); 359 360 tcf_queue_work(&mask->rwork, fl_mask_free_work); 361 362 return true; 363 } 364 365 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 366 { 367 /* Flower classifier only changes root pointer during init and destroy. 368 * Users must obtain reference to tcf_proto instance before calling its 369 * API, so tp->root pointer is protected from concurrent call to 370 * fl_destroy() by reference counting. 371 */ 372 return rcu_dereference_raw(tp->root); 373 } 374 375 static void __fl_destroy_filter(struct cls_fl_filter *f) 376 { 377 tcf_exts_destroy(&f->exts); 378 tcf_exts_put_net(&f->exts); 379 kfree(f); 380 } 381 382 static void fl_destroy_filter_work(struct work_struct *work) 383 { 384 struct cls_fl_filter *f = container_of(to_rcu_work(work), 385 struct cls_fl_filter, rwork); 386 387 __fl_destroy_filter(f); 388 } 389 390 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 391 bool rtnl_held, struct netlink_ext_ack *extack) 392 { 393 struct tc_cls_flower_offload cls_flower = {}; 394 struct tcf_block *block = tp->chain->block; 395 396 if (!rtnl_held) 397 rtnl_lock(); 398 399 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 400 cls_flower.command = TC_CLSFLOWER_DESTROY; 401 cls_flower.cookie = (unsigned long) f; 402 403 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 404 spin_lock(&tp->lock); 405 list_del_init(&f->hw_list); 406 tcf_block_offload_dec(block, &f->flags); 407 spin_unlock(&tp->lock); 408 409 if (!rtnl_held) 410 rtnl_unlock(); 411 } 412 413 static int fl_hw_replace_filter(struct tcf_proto *tp, 414 struct cls_fl_filter *f, bool rtnl_held, 415 struct netlink_ext_ack *extack) 416 { 417 struct cls_fl_head *head = fl_head_dereference(tp); 418 struct tc_cls_flower_offload cls_flower = {}; 419 struct tcf_block *block = tp->chain->block; 420 bool skip_sw = tc_skip_sw(f->flags); 421 int err = 0; 422 423 if (!rtnl_held) 424 rtnl_lock(); 425 426 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 427 if (!cls_flower.rule) { 428 err = -ENOMEM; 429 goto errout; 430 } 431 432 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 433 cls_flower.command = TC_CLSFLOWER_REPLACE; 434 cls_flower.cookie = (unsigned long) f; 435 cls_flower.rule->match.dissector = &f->mask->dissector; 436 cls_flower.rule->match.mask = &f->mask->key; 437 cls_flower.rule->match.key = &f->mkey; 438 cls_flower.classid = f->res.classid; 439 440 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 441 if (err) { 442 kfree(cls_flower.rule); 443 if (skip_sw) 444 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 445 else 446 err = 0; 447 goto errout; 448 } 449 450 err = tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw); 451 kfree(cls_flower.rule); 452 453 if (err < 0) { 454 fl_hw_destroy_filter(tp, f, true, NULL); 455 goto errout; 456 } else if (err > 0) { 457 f->in_hw_count = err; 458 err = 0; 459 spin_lock(&tp->lock); 460 tcf_block_offload_inc(block, &f->flags); 461 spin_unlock(&tp->lock); 462 } 463 464 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) { 465 err = -EINVAL; 466 goto errout; 467 } 468 469 spin_lock(&tp->lock); 470 list_add(&f->hw_list, &head->hw_filters); 471 spin_unlock(&tp->lock); 472 errout: 473 if (!rtnl_held) 474 rtnl_unlock(); 475 476 return err; 477 } 478 479 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 480 bool rtnl_held) 481 { 482 struct tc_cls_flower_offload cls_flower = {}; 483 struct tcf_block *block = tp->chain->block; 484 485 if (!rtnl_held) 486 rtnl_lock(); 487 488 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 489 cls_flower.command = TC_CLSFLOWER_STATS; 490 cls_flower.cookie = (unsigned long) f; 491 cls_flower.classid = f->res.classid; 492 493 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 494 495 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes, 496 cls_flower.stats.pkts, 497 cls_flower.stats.lastused); 498 499 if (!rtnl_held) 500 rtnl_unlock(); 501 } 502 503 static void __fl_put(struct cls_fl_filter *f) 504 { 505 if (!refcount_dec_and_test(&f->refcnt)) 506 return; 507 508 if (tcf_exts_get_net(&f->exts)) 509 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 510 else 511 __fl_destroy_filter(f); 512 } 513 514 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 515 { 516 struct cls_fl_filter *f; 517 518 rcu_read_lock(); 519 f = idr_find(&head->handle_idr, handle); 520 if (f && !refcount_inc_not_zero(&f->refcnt)) 521 f = NULL; 522 rcu_read_unlock(); 523 524 return f; 525 } 526 527 static struct cls_fl_filter *fl_get_next_filter(struct tcf_proto *tp, 528 unsigned long *handle) 529 { 530 struct cls_fl_head *head = fl_head_dereference(tp); 531 struct cls_fl_filter *f; 532 533 rcu_read_lock(); 534 while ((f = idr_get_next_ul(&head->handle_idr, handle))) { 535 /* don't return filters that are being deleted */ 536 if (refcount_inc_not_zero(&f->refcnt)) 537 break; 538 ++(*handle); 539 } 540 rcu_read_unlock(); 541 542 return f; 543 } 544 545 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 546 bool *last, bool rtnl_held, 547 struct netlink_ext_ack *extack) 548 { 549 struct cls_fl_head *head = fl_head_dereference(tp); 550 551 *last = false; 552 553 spin_lock(&tp->lock); 554 if (f->deleted) { 555 spin_unlock(&tp->lock); 556 return -ENOENT; 557 } 558 559 f->deleted = true; 560 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 561 f->mask->filter_ht_params); 562 idr_remove(&head->handle_idr, f->handle); 563 list_del_rcu(&f->list); 564 spin_unlock(&tp->lock); 565 566 *last = fl_mask_put(head, f->mask); 567 if (!tc_skip_hw(f->flags)) 568 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 569 tcf_unbind_filter(tp, &f->res); 570 __fl_put(f); 571 572 return 0; 573 } 574 575 static void fl_destroy_sleepable(struct work_struct *work) 576 { 577 struct cls_fl_head *head = container_of(to_rcu_work(work), 578 struct cls_fl_head, 579 rwork); 580 581 rhashtable_destroy(&head->ht); 582 kfree(head); 583 module_put(THIS_MODULE); 584 } 585 586 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 587 struct netlink_ext_ack *extack) 588 { 589 struct cls_fl_head *head = fl_head_dereference(tp); 590 struct fl_flow_mask *mask, *next_mask; 591 struct cls_fl_filter *f, *next; 592 bool last; 593 594 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 595 list_for_each_entry_safe(f, next, &mask->filters, list) { 596 __fl_delete(tp, f, &last, rtnl_held, extack); 597 if (last) 598 break; 599 } 600 } 601 idr_destroy(&head->handle_idr); 602 603 __module_get(THIS_MODULE); 604 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 605 } 606 607 static void fl_put(struct tcf_proto *tp, void *arg) 608 { 609 struct cls_fl_filter *f = arg; 610 611 __fl_put(f); 612 } 613 614 static void *fl_get(struct tcf_proto *tp, u32 handle) 615 { 616 struct cls_fl_head *head = fl_head_dereference(tp); 617 618 return __fl_get(head, handle); 619 } 620 621 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 622 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 623 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 624 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 625 .len = IFNAMSIZ }, 626 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 627 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 628 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 629 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 630 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 631 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 632 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 633 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 634 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 635 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 636 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 637 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 638 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 639 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 640 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 641 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 642 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 643 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 644 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 646 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 648 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 649 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 650 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 651 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 652 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 653 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 654 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 655 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 656 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 657 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 658 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 659 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 660 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 661 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 662 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 663 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 664 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 665 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 666 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 667 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 668 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 669 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 670 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 671 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 672 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 673 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 674 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 675 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 676 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 677 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 678 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 679 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 680 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 681 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 682 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 683 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 684 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 685 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 686 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 687 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 688 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 689 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 690 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 692 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 693 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 694 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 695 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 696 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 697 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 698 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 699 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 700 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 701 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 702 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 703 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 704 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 705 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 706 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 707 }; 708 709 static const struct nla_policy 710 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 711 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 712 }; 713 714 static const struct nla_policy 715 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 716 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 717 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 718 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 719 .len = 128 }, 720 }; 721 722 static void fl_set_key_val(struct nlattr **tb, 723 void *val, int val_type, 724 void *mask, int mask_type, int len) 725 { 726 if (!tb[val_type]) 727 return; 728 memcpy(val, nla_data(tb[val_type]), len); 729 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 730 memset(mask, 0xff, len); 731 else 732 memcpy(mask, nla_data(tb[mask_type]), len); 733 } 734 735 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 736 struct fl_flow_key *mask) 737 { 738 fl_set_key_val(tb, &key->tp_min.dst, 739 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_min.dst, 740 TCA_FLOWER_UNSPEC, sizeof(key->tp_min.dst)); 741 fl_set_key_val(tb, &key->tp_max.dst, 742 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_max.dst, 743 TCA_FLOWER_UNSPEC, sizeof(key->tp_max.dst)); 744 fl_set_key_val(tb, &key->tp_min.src, 745 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_min.src, 746 TCA_FLOWER_UNSPEC, sizeof(key->tp_min.src)); 747 fl_set_key_val(tb, &key->tp_max.src, 748 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_max.src, 749 TCA_FLOWER_UNSPEC, sizeof(key->tp_max.src)); 750 751 if ((mask->tp_min.dst && mask->tp_max.dst && 752 htons(key->tp_max.dst) <= htons(key->tp_min.dst)) || 753 (mask->tp_min.src && mask->tp_max.src && 754 htons(key->tp_max.src) <= htons(key->tp_min.src))) 755 return -EINVAL; 756 757 return 0; 758 } 759 760 static int fl_set_key_mpls(struct nlattr **tb, 761 struct flow_dissector_key_mpls *key_val, 762 struct flow_dissector_key_mpls *key_mask) 763 { 764 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 765 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 766 key_mask->mpls_ttl = MPLS_TTL_MASK; 767 } 768 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 769 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 770 771 if (bos & ~MPLS_BOS_MASK) 772 return -EINVAL; 773 key_val->mpls_bos = bos; 774 key_mask->mpls_bos = MPLS_BOS_MASK; 775 } 776 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 777 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 778 779 if (tc & ~MPLS_TC_MASK) 780 return -EINVAL; 781 key_val->mpls_tc = tc; 782 key_mask->mpls_tc = MPLS_TC_MASK; 783 } 784 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 785 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 786 787 if (label & ~MPLS_LABEL_MASK) 788 return -EINVAL; 789 key_val->mpls_label = label; 790 key_mask->mpls_label = MPLS_LABEL_MASK; 791 } 792 return 0; 793 } 794 795 static void fl_set_key_vlan(struct nlattr **tb, 796 __be16 ethertype, 797 int vlan_id_key, int vlan_prio_key, 798 struct flow_dissector_key_vlan *key_val, 799 struct flow_dissector_key_vlan *key_mask) 800 { 801 #define VLAN_PRIORITY_MASK 0x7 802 803 if (tb[vlan_id_key]) { 804 key_val->vlan_id = 805 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 806 key_mask->vlan_id = VLAN_VID_MASK; 807 } 808 if (tb[vlan_prio_key]) { 809 key_val->vlan_priority = 810 nla_get_u8(tb[vlan_prio_key]) & 811 VLAN_PRIORITY_MASK; 812 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 813 } 814 key_val->vlan_tpid = ethertype; 815 key_mask->vlan_tpid = cpu_to_be16(~0); 816 } 817 818 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 819 u32 *dissector_key, u32 *dissector_mask, 820 u32 flower_flag_bit, u32 dissector_flag_bit) 821 { 822 if (flower_mask & flower_flag_bit) { 823 *dissector_mask |= dissector_flag_bit; 824 if (flower_key & flower_flag_bit) 825 *dissector_key |= dissector_flag_bit; 826 } 827 } 828 829 static int fl_set_key_flags(struct nlattr **tb, 830 u32 *flags_key, u32 *flags_mask) 831 { 832 u32 key, mask; 833 834 /* mask is mandatory for flags */ 835 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 836 return -EINVAL; 837 838 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 839 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 840 841 *flags_key = 0; 842 *flags_mask = 0; 843 844 fl_set_key_flag(key, mask, flags_key, flags_mask, 845 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 846 fl_set_key_flag(key, mask, flags_key, flags_mask, 847 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 848 FLOW_DIS_FIRST_FRAG); 849 850 return 0; 851 } 852 853 static void fl_set_key_ip(struct nlattr **tb, bool encap, 854 struct flow_dissector_key_ip *key, 855 struct flow_dissector_key_ip *mask) 856 { 857 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 858 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 859 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 860 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 861 862 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 863 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 864 } 865 866 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 867 int depth, int option_len, 868 struct netlink_ext_ack *extack) 869 { 870 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 871 struct nlattr *class = NULL, *type = NULL, *data = NULL; 872 struct geneve_opt *opt; 873 int err, data_len = 0; 874 875 if (option_len > sizeof(struct geneve_opt)) 876 data_len = option_len - sizeof(struct geneve_opt); 877 878 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 879 memset(opt, 0xff, option_len); 880 opt->length = data_len / 4; 881 opt->r1 = 0; 882 opt->r2 = 0; 883 opt->r3 = 0; 884 885 /* If no mask has been prodived we assume an exact match. */ 886 if (!depth) 887 return sizeof(struct geneve_opt) + data_len; 888 889 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 890 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 891 return -EINVAL; 892 } 893 894 err = nla_parse_nested_deprecated(tb, 895 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 896 nla, geneve_opt_policy, extack); 897 if (err < 0) 898 return err; 899 900 /* We are not allowed to omit any of CLASS, TYPE or DATA 901 * fields from the key. 902 */ 903 if (!option_len && 904 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 905 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 906 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 907 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 908 return -EINVAL; 909 } 910 911 /* Omitting any of CLASS, TYPE or DATA fields is allowed 912 * for the mask. 913 */ 914 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 915 int new_len = key->enc_opts.len; 916 917 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 918 data_len = nla_len(data); 919 if (data_len < 4) { 920 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 921 return -ERANGE; 922 } 923 if (data_len % 4) { 924 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 925 return -ERANGE; 926 } 927 928 new_len += sizeof(struct geneve_opt) + data_len; 929 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 930 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 931 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 932 return -ERANGE; 933 } 934 opt->length = data_len / 4; 935 memcpy(opt->opt_data, nla_data(data), data_len); 936 } 937 938 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 939 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 940 opt->opt_class = nla_get_be16(class); 941 } 942 943 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 944 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 945 opt->type = nla_get_u8(type); 946 } 947 948 return sizeof(struct geneve_opt) + data_len; 949 } 950 951 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 952 struct fl_flow_key *mask, 953 struct netlink_ext_ack *extack) 954 { 955 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 956 int err, option_len, key_depth, msk_depth = 0; 957 958 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 959 TCA_FLOWER_KEY_ENC_OPTS_MAX, 960 enc_opts_policy, extack); 961 if (err) 962 return err; 963 964 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 965 966 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 967 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 968 TCA_FLOWER_KEY_ENC_OPTS_MAX, 969 enc_opts_policy, extack); 970 if (err) 971 return err; 972 973 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 974 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 975 } 976 977 nla_for_each_attr(nla_opt_key, nla_enc_key, 978 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 979 switch (nla_type(nla_opt_key)) { 980 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 981 option_len = 0; 982 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 983 option_len = fl_set_geneve_opt(nla_opt_key, key, 984 key_depth, option_len, 985 extack); 986 if (option_len < 0) 987 return option_len; 988 989 key->enc_opts.len += option_len; 990 /* At the same time we need to parse through the mask 991 * in order to verify exact and mask attribute lengths. 992 */ 993 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 994 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 995 msk_depth, option_len, 996 extack); 997 if (option_len < 0) 998 return option_len; 999 1000 mask->enc_opts.len += option_len; 1001 if (key->enc_opts.len != mask->enc_opts.len) { 1002 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1003 return -EINVAL; 1004 } 1005 1006 if (msk_depth) 1007 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1008 break; 1009 default: 1010 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1011 return -EINVAL; 1012 } 1013 } 1014 1015 return 0; 1016 } 1017 1018 static int fl_set_key(struct net *net, struct nlattr **tb, 1019 struct fl_flow_key *key, struct fl_flow_key *mask, 1020 struct netlink_ext_ack *extack) 1021 { 1022 __be16 ethertype; 1023 int ret = 0; 1024 1025 if (tb[TCA_FLOWER_INDEV]) { 1026 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1027 if (err < 0) 1028 return err; 1029 key->meta.ingress_ifindex = err; 1030 mask->meta.ingress_ifindex = 0xffffffff; 1031 } 1032 1033 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1034 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1035 sizeof(key->eth.dst)); 1036 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1037 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1038 sizeof(key->eth.src)); 1039 1040 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1041 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1042 1043 if (eth_type_vlan(ethertype)) { 1044 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1045 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 1046 &mask->vlan); 1047 1048 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1049 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1050 if (eth_type_vlan(ethertype)) { 1051 fl_set_key_vlan(tb, ethertype, 1052 TCA_FLOWER_KEY_CVLAN_ID, 1053 TCA_FLOWER_KEY_CVLAN_PRIO, 1054 &key->cvlan, &mask->cvlan); 1055 fl_set_key_val(tb, &key->basic.n_proto, 1056 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1057 &mask->basic.n_proto, 1058 TCA_FLOWER_UNSPEC, 1059 sizeof(key->basic.n_proto)); 1060 } else { 1061 key->basic.n_proto = ethertype; 1062 mask->basic.n_proto = cpu_to_be16(~0); 1063 } 1064 } 1065 } else { 1066 key->basic.n_proto = ethertype; 1067 mask->basic.n_proto = cpu_to_be16(~0); 1068 } 1069 } 1070 1071 if (key->basic.n_proto == htons(ETH_P_IP) || 1072 key->basic.n_proto == htons(ETH_P_IPV6)) { 1073 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1074 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1075 sizeof(key->basic.ip_proto)); 1076 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1077 } 1078 1079 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1080 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1081 mask->control.addr_type = ~0; 1082 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1083 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1084 sizeof(key->ipv4.src)); 1085 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1086 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1087 sizeof(key->ipv4.dst)); 1088 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1089 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1090 mask->control.addr_type = ~0; 1091 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1092 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1093 sizeof(key->ipv6.src)); 1094 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1095 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1096 sizeof(key->ipv6.dst)); 1097 } 1098 1099 if (key->basic.ip_proto == IPPROTO_TCP) { 1100 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1101 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1102 sizeof(key->tp.src)); 1103 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1104 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1105 sizeof(key->tp.dst)); 1106 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1107 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1108 sizeof(key->tcp.flags)); 1109 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1110 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1111 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1112 sizeof(key->tp.src)); 1113 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1114 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1115 sizeof(key->tp.dst)); 1116 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1117 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1118 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1119 sizeof(key->tp.src)); 1120 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1121 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1122 sizeof(key->tp.dst)); 1123 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1124 key->basic.ip_proto == IPPROTO_ICMP) { 1125 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1126 &mask->icmp.type, 1127 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1128 sizeof(key->icmp.type)); 1129 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1130 &mask->icmp.code, 1131 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1132 sizeof(key->icmp.code)); 1133 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1134 key->basic.ip_proto == IPPROTO_ICMPV6) { 1135 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1136 &mask->icmp.type, 1137 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1138 sizeof(key->icmp.type)); 1139 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1140 &mask->icmp.code, 1141 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1142 sizeof(key->icmp.code)); 1143 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1144 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1145 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 1146 if (ret) 1147 return ret; 1148 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1149 key->basic.n_proto == htons(ETH_P_RARP)) { 1150 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1151 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1152 sizeof(key->arp.sip)); 1153 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1154 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1155 sizeof(key->arp.tip)); 1156 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1157 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1158 sizeof(key->arp.op)); 1159 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1160 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1161 sizeof(key->arp.sha)); 1162 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1163 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1164 sizeof(key->arp.tha)); 1165 } 1166 1167 if (key->basic.ip_proto == IPPROTO_TCP || 1168 key->basic.ip_proto == IPPROTO_UDP || 1169 key->basic.ip_proto == IPPROTO_SCTP) { 1170 ret = fl_set_key_port_range(tb, key, mask); 1171 if (ret) 1172 return ret; 1173 } 1174 1175 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1176 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1177 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1178 mask->enc_control.addr_type = ~0; 1179 fl_set_key_val(tb, &key->enc_ipv4.src, 1180 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1181 &mask->enc_ipv4.src, 1182 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1183 sizeof(key->enc_ipv4.src)); 1184 fl_set_key_val(tb, &key->enc_ipv4.dst, 1185 TCA_FLOWER_KEY_ENC_IPV4_DST, 1186 &mask->enc_ipv4.dst, 1187 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1188 sizeof(key->enc_ipv4.dst)); 1189 } 1190 1191 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1192 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1193 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1194 mask->enc_control.addr_type = ~0; 1195 fl_set_key_val(tb, &key->enc_ipv6.src, 1196 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1197 &mask->enc_ipv6.src, 1198 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1199 sizeof(key->enc_ipv6.src)); 1200 fl_set_key_val(tb, &key->enc_ipv6.dst, 1201 TCA_FLOWER_KEY_ENC_IPV6_DST, 1202 &mask->enc_ipv6.dst, 1203 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1204 sizeof(key->enc_ipv6.dst)); 1205 } 1206 1207 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1208 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1209 sizeof(key->enc_key_id.keyid)); 1210 1211 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1212 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1213 sizeof(key->enc_tp.src)); 1214 1215 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1216 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1217 sizeof(key->enc_tp.dst)); 1218 1219 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1220 1221 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1222 ret = fl_set_enc_opt(tb, key, mask, extack); 1223 if (ret) 1224 return ret; 1225 } 1226 1227 if (tb[TCA_FLOWER_KEY_FLAGS]) 1228 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 1229 1230 return ret; 1231 } 1232 1233 static void fl_mask_copy(struct fl_flow_mask *dst, 1234 struct fl_flow_mask *src) 1235 { 1236 const void *psrc = fl_key_get_start(&src->key, src); 1237 void *pdst = fl_key_get_start(&dst->key, src); 1238 1239 memcpy(pdst, psrc, fl_mask_range(src)); 1240 dst->range = src->range; 1241 } 1242 1243 static const struct rhashtable_params fl_ht_params = { 1244 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1245 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1246 .automatic_shrinking = true, 1247 }; 1248 1249 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1250 { 1251 mask->filter_ht_params = fl_ht_params; 1252 mask->filter_ht_params.key_len = fl_mask_range(mask); 1253 mask->filter_ht_params.key_offset += mask->range.start; 1254 1255 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1256 } 1257 1258 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1259 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member) 1260 1261 #define FL_KEY_IS_MASKED(mask, member) \ 1262 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1263 0, FL_KEY_MEMBER_SIZE(member)) \ 1264 1265 #define FL_KEY_SET(keys, cnt, id, member) \ 1266 do { \ 1267 keys[cnt].key_id = id; \ 1268 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1269 cnt++; \ 1270 } while(0); 1271 1272 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1273 do { \ 1274 if (FL_KEY_IS_MASKED(mask, member)) \ 1275 FL_KEY_SET(keys, cnt, id, member); \ 1276 } while(0); 1277 1278 static void fl_init_dissector(struct flow_dissector *dissector, 1279 struct fl_flow_key *mask) 1280 { 1281 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1282 size_t cnt = 0; 1283 1284 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1285 FLOW_DISSECTOR_KEY_META, meta); 1286 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1287 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1288 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1289 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1290 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1291 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1292 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1293 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1294 if (FL_KEY_IS_MASKED(mask, tp) || 1295 FL_KEY_IS_MASKED(mask, tp_min) || FL_KEY_IS_MASKED(mask, tp_max)) 1296 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp); 1297 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1298 FLOW_DISSECTOR_KEY_IP, ip); 1299 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1300 FLOW_DISSECTOR_KEY_TCP, tcp); 1301 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1302 FLOW_DISSECTOR_KEY_ICMP, icmp); 1303 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1304 FLOW_DISSECTOR_KEY_ARP, arp); 1305 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1306 FLOW_DISSECTOR_KEY_MPLS, mpls); 1307 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1308 FLOW_DISSECTOR_KEY_VLAN, vlan); 1309 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1310 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1311 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1312 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1313 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1314 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1315 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1316 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1317 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1318 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1319 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1320 enc_control); 1321 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1322 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1323 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1324 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1325 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1326 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1327 1328 skb_flow_dissector_init(dissector, keys, cnt); 1329 } 1330 1331 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1332 struct fl_flow_mask *mask) 1333 { 1334 struct fl_flow_mask *newmask; 1335 int err; 1336 1337 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1338 if (!newmask) 1339 return ERR_PTR(-ENOMEM); 1340 1341 fl_mask_copy(newmask, mask); 1342 1343 if ((newmask->key.tp_min.dst && newmask->key.tp_max.dst) || 1344 (newmask->key.tp_min.src && newmask->key.tp_max.src)) 1345 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1346 1347 err = fl_init_mask_hashtable(newmask); 1348 if (err) 1349 goto errout_free; 1350 1351 fl_init_dissector(&newmask->dissector, &newmask->key); 1352 1353 INIT_LIST_HEAD_RCU(&newmask->filters); 1354 1355 refcount_set(&newmask->refcnt, 1); 1356 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1357 &newmask->ht_node, mask_ht_params); 1358 if (err) 1359 goto errout_destroy; 1360 1361 spin_lock(&head->masks_lock); 1362 list_add_tail_rcu(&newmask->list, &head->masks); 1363 spin_unlock(&head->masks_lock); 1364 1365 return newmask; 1366 1367 errout_destroy: 1368 rhashtable_destroy(&newmask->ht); 1369 errout_free: 1370 kfree(newmask); 1371 1372 return ERR_PTR(err); 1373 } 1374 1375 static int fl_check_assign_mask(struct cls_fl_head *head, 1376 struct cls_fl_filter *fnew, 1377 struct cls_fl_filter *fold, 1378 struct fl_flow_mask *mask) 1379 { 1380 struct fl_flow_mask *newmask; 1381 int ret = 0; 1382 1383 rcu_read_lock(); 1384 1385 /* Insert mask as temporary node to prevent concurrent creation of mask 1386 * with same key. Any concurrent lookups with same key will return 1387 * -EAGAIN because mask's refcnt is zero. 1388 */ 1389 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1390 &mask->ht_node, 1391 mask_ht_params); 1392 if (!fnew->mask) { 1393 rcu_read_unlock(); 1394 1395 if (fold) { 1396 ret = -EINVAL; 1397 goto errout_cleanup; 1398 } 1399 1400 newmask = fl_create_new_mask(head, mask); 1401 if (IS_ERR(newmask)) { 1402 ret = PTR_ERR(newmask); 1403 goto errout_cleanup; 1404 } 1405 1406 fnew->mask = newmask; 1407 return 0; 1408 } else if (IS_ERR(fnew->mask)) { 1409 ret = PTR_ERR(fnew->mask); 1410 } else if (fold && fold->mask != fnew->mask) { 1411 ret = -EINVAL; 1412 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1413 /* Mask was deleted concurrently, try again */ 1414 ret = -EAGAIN; 1415 } 1416 rcu_read_unlock(); 1417 return ret; 1418 1419 errout_cleanup: 1420 rhashtable_remove_fast(&head->ht, &mask->ht_node, 1421 mask_ht_params); 1422 return ret; 1423 } 1424 1425 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1426 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1427 unsigned long base, struct nlattr **tb, 1428 struct nlattr *est, bool ovr, 1429 struct fl_flow_tmplt *tmplt, bool rtnl_held, 1430 struct netlink_ext_ack *extack) 1431 { 1432 int err; 1433 1434 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held, 1435 extack); 1436 if (err < 0) 1437 return err; 1438 1439 if (tb[TCA_FLOWER_CLASSID]) { 1440 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1441 if (!rtnl_held) 1442 rtnl_lock(); 1443 tcf_bind_filter(tp, &f->res, base); 1444 if (!rtnl_held) 1445 rtnl_unlock(); 1446 } 1447 1448 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1449 if (err) 1450 return err; 1451 1452 fl_mask_update_range(mask); 1453 fl_set_masked_key(&f->mkey, &f->key, mask); 1454 1455 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1456 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1457 return -EINVAL; 1458 } 1459 1460 return 0; 1461 } 1462 1463 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 1464 struct cls_fl_filter *fold, 1465 bool *in_ht) 1466 { 1467 struct fl_flow_mask *mask = fnew->mask; 1468 int err; 1469 1470 err = rhashtable_lookup_insert_fast(&mask->ht, 1471 &fnew->ht_node, 1472 mask->filter_ht_params); 1473 if (err) { 1474 *in_ht = false; 1475 /* It is okay if filter with same key exists when 1476 * overwriting. 1477 */ 1478 return fold && err == -EEXIST ? 0 : err; 1479 } 1480 1481 *in_ht = true; 1482 return 0; 1483 } 1484 1485 static int fl_change(struct net *net, struct sk_buff *in_skb, 1486 struct tcf_proto *tp, unsigned long base, 1487 u32 handle, struct nlattr **tca, 1488 void **arg, bool ovr, bool rtnl_held, 1489 struct netlink_ext_ack *extack) 1490 { 1491 struct cls_fl_head *head = fl_head_dereference(tp); 1492 struct cls_fl_filter *fold = *arg; 1493 struct cls_fl_filter *fnew; 1494 struct fl_flow_mask *mask; 1495 struct nlattr **tb; 1496 bool in_ht; 1497 int err; 1498 1499 if (!tca[TCA_OPTIONS]) { 1500 err = -EINVAL; 1501 goto errout_fold; 1502 } 1503 1504 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1505 if (!mask) { 1506 err = -ENOBUFS; 1507 goto errout_fold; 1508 } 1509 1510 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1511 if (!tb) { 1512 err = -ENOBUFS; 1513 goto errout_mask_alloc; 1514 } 1515 1516 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1517 tca[TCA_OPTIONS], fl_policy, NULL); 1518 if (err < 0) 1519 goto errout_tb; 1520 1521 if (fold && handle && fold->handle != handle) { 1522 err = -EINVAL; 1523 goto errout_tb; 1524 } 1525 1526 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1527 if (!fnew) { 1528 err = -ENOBUFS; 1529 goto errout_tb; 1530 } 1531 INIT_LIST_HEAD(&fnew->hw_list); 1532 refcount_set(&fnew->refcnt, 1); 1533 1534 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 1535 if (err < 0) 1536 goto errout; 1537 1538 if (tb[TCA_FLOWER_FLAGS]) { 1539 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1540 1541 if (!tc_flags_valid(fnew->flags)) { 1542 err = -EINVAL; 1543 goto errout; 1544 } 1545 } 1546 1547 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 1548 tp->chain->tmplt_priv, rtnl_held, extack); 1549 if (err) 1550 goto errout; 1551 1552 err = fl_check_assign_mask(head, fnew, fold, mask); 1553 if (err) 1554 goto errout; 1555 1556 err = fl_ht_insert_unique(fnew, fold, &in_ht); 1557 if (err) 1558 goto errout_mask; 1559 1560 if (!tc_skip_hw(fnew->flags)) { 1561 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 1562 if (err) 1563 goto errout_ht; 1564 } 1565 1566 if (!tc_in_hw(fnew->flags)) 1567 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1568 1569 spin_lock(&tp->lock); 1570 1571 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 1572 * proto again or create new one, if necessary. 1573 */ 1574 if (tp->deleting) { 1575 err = -EAGAIN; 1576 goto errout_hw; 1577 } 1578 1579 if (fold) { 1580 /* Fold filter was deleted concurrently. Retry lookup. */ 1581 if (fold->deleted) { 1582 err = -EAGAIN; 1583 goto errout_hw; 1584 } 1585 1586 fnew->handle = handle; 1587 1588 if (!in_ht) { 1589 struct rhashtable_params params = 1590 fnew->mask->filter_ht_params; 1591 1592 err = rhashtable_insert_fast(&fnew->mask->ht, 1593 &fnew->ht_node, 1594 params); 1595 if (err) 1596 goto errout_hw; 1597 in_ht = true; 1598 } 1599 1600 refcount_inc(&fnew->refcnt); 1601 rhashtable_remove_fast(&fold->mask->ht, 1602 &fold->ht_node, 1603 fold->mask->filter_ht_params); 1604 idr_replace(&head->handle_idr, fnew, fnew->handle); 1605 list_replace_rcu(&fold->list, &fnew->list); 1606 fold->deleted = true; 1607 1608 spin_unlock(&tp->lock); 1609 1610 fl_mask_put(head, fold->mask); 1611 if (!tc_skip_hw(fold->flags)) 1612 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 1613 tcf_unbind_filter(tp, &fold->res); 1614 /* Caller holds reference to fold, so refcnt is always > 0 1615 * after this. 1616 */ 1617 refcount_dec(&fold->refcnt); 1618 __fl_put(fold); 1619 } else { 1620 if (handle) { 1621 /* user specifies a handle and it doesn't exist */ 1622 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1623 handle, GFP_ATOMIC); 1624 1625 /* Filter with specified handle was concurrently 1626 * inserted after initial check in cls_api. This is not 1627 * necessarily an error if NLM_F_EXCL is not set in 1628 * message flags. Returning EAGAIN will cause cls_api to 1629 * try to update concurrently inserted rule. 1630 */ 1631 if (err == -ENOSPC) 1632 err = -EAGAIN; 1633 } else { 1634 handle = 1; 1635 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1636 INT_MAX, GFP_ATOMIC); 1637 } 1638 if (err) 1639 goto errout_hw; 1640 1641 refcount_inc(&fnew->refcnt); 1642 fnew->handle = handle; 1643 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1644 spin_unlock(&tp->lock); 1645 } 1646 1647 *arg = fnew; 1648 1649 kfree(tb); 1650 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 1651 return 0; 1652 1653 errout_ht: 1654 spin_lock(&tp->lock); 1655 errout_hw: 1656 fnew->deleted = true; 1657 spin_unlock(&tp->lock); 1658 if (!tc_skip_hw(fnew->flags)) 1659 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 1660 if (in_ht) 1661 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 1662 fnew->mask->filter_ht_params); 1663 errout_mask: 1664 fl_mask_put(head, fnew->mask); 1665 errout: 1666 __fl_put(fnew); 1667 errout_tb: 1668 kfree(tb); 1669 errout_mask_alloc: 1670 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 1671 errout_fold: 1672 if (fold) 1673 __fl_put(fold); 1674 return err; 1675 } 1676 1677 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1678 bool rtnl_held, struct netlink_ext_ack *extack) 1679 { 1680 struct cls_fl_head *head = fl_head_dereference(tp); 1681 struct cls_fl_filter *f = arg; 1682 bool last_on_mask; 1683 int err = 0; 1684 1685 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 1686 *last = list_empty(&head->masks); 1687 __fl_put(f); 1688 1689 return err; 1690 } 1691 1692 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 1693 bool rtnl_held) 1694 { 1695 struct cls_fl_filter *f; 1696 1697 arg->count = arg->skip; 1698 1699 while ((f = fl_get_next_filter(tp, &arg->cookie)) != NULL) { 1700 if (arg->fn(tp, f, arg) < 0) { 1701 __fl_put(f); 1702 arg->stop = 1; 1703 break; 1704 } 1705 __fl_put(f); 1706 arg->cookie++; 1707 arg->count++; 1708 } 1709 } 1710 1711 static struct cls_fl_filter * 1712 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 1713 { 1714 struct cls_fl_head *head = fl_head_dereference(tp); 1715 1716 spin_lock(&tp->lock); 1717 if (list_empty(&head->hw_filters)) { 1718 spin_unlock(&tp->lock); 1719 return NULL; 1720 } 1721 1722 if (!f) 1723 f = list_entry(&head->hw_filters, struct cls_fl_filter, 1724 hw_list); 1725 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 1726 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 1727 spin_unlock(&tp->lock); 1728 return f; 1729 } 1730 } 1731 1732 spin_unlock(&tp->lock); 1733 return NULL; 1734 } 1735 1736 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1737 void *cb_priv, struct netlink_ext_ack *extack) 1738 { 1739 struct tc_cls_flower_offload cls_flower = {}; 1740 struct tcf_block *block = tp->chain->block; 1741 struct cls_fl_filter *f = NULL; 1742 int err; 1743 1744 /* hw_filters list can only be changed by hw offload functions after 1745 * obtaining rtnl lock. Make sure it is not changed while reoffload is 1746 * iterating it. 1747 */ 1748 ASSERT_RTNL(); 1749 1750 while ((f = fl_get_next_hw_filter(tp, f, add))) { 1751 cls_flower.rule = 1752 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 1753 if (!cls_flower.rule) { 1754 __fl_put(f); 1755 return -ENOMEM; 1756 } 1757 1758 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 1759 extack); 1760 cls_flower.command = add ? 1761 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1762 cls_flower.cookie = (unsigned long)f; 1763 cls_flower.rule->match.dissector = &f->mask->dissector; 1764 cls_flower.rule->match.mask = &f->mask->key; 1765 cls_flower.rule->match.key = &f->mkey; 1766 1767 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 1768 if (err) { 1769 kfree(cls_flower.rule); 1770 if (tc_skip_sw(f->flags)) { 1771 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 1772 __fl_put(f); 1773 return err; 1774 } 1775 goto next_flow; 1776 } 1777 1778 cls_flower.classid = f->res.classid; 1779 1780 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1781 kfree(cls_flower.rule); 1782 1783 if (err) { 1784 if (add && tc_skip_sw(f->flags)) { 1785 __fl_put(f); 1786 return err; 1787 } 1788 goto next_flow; 1789 } 1790 1791 spin_lock(&tp->lock); 1792 tc_cls_offload_cnt_update(block, &f->in_hw_count, &f->flags, 1793 add); 1794 spin_unlock(&tp->lock); 1795 next_flow: 1796 __fl_put(f); 1797 } 1798 1799 return 0; 1800 } 1801 1802 static int fl_hw_create_tmplt(struct tcf_chain *chain, 1803 struct fl_flow_tmplt *tmplt) 1804 { 1805 struct tc_cls_flower_offload cls_flower = {}; 1806 struct tcf_block *block = chain->block; 1807 1808 cls_flower.rule = flow_rule_alloc(0); 1809 if (!cls_flower.rule) 1810 return -ENOMEM; 1811 1812 cls_flower.common.chain_index = chain->index; 1813 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1814 cls_flower.cookie = (unsigned long) tmplt; 1815 cls_flower.rule->match.dissector = &tmplt->dissector; 1816 cls_flower.rule->match.mask = &tmplt->mask; 1817 cls_flower.rule->match.key = &tmplt->dummy_key; 1818 1819 /* We don't care if driver (any of them) fails to handle this 1820 * call. It serves just as a hint for it. 1821 */ 1822 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1823 kfree(cls_flower.rule); 1824 1825 return 0; 1826 } 1827 1828 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1829 struct fl_flow_tmplt *tmplt) 1830 { 1831 struct tc_cls_flower_offload cls_flower = {}; 1832 struct tcf_block *block = chain->block; 1833 1834 cls_flower.common.chain_index = chain->index; 1835 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1836 cls_flower.cookie = (unsigned long) tmplt; 1837 1838 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1839 } 1840 1841 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1842 struct nlattr **tca, 1843 struct netlink_ext_ack *extack) 1844 { 1845 struct fl_flow_tmplt *tmplt; 1846 struct nlattr **tb; 1847 int err; 1848 1849 if (!tca[TCA_OPTIONS]) 1850 return ERR_PTR(-EINVAL); 1851 1852 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1853 if (!tb) 1854 return ERR_PTR(-ENOBUFS); 1855 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1856 tca[TCA_OPTIONS], fl_policy, NULL); 1857 if (err) 1858 goto errout_tb; 1859 1860 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1861 if (!tmplt) { 1862 err = -ENOMEM; 1863 goto errout_tb; 1864 } 1865 tmplt->chain = chain; 1866 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1867 if (err) 1868 goto errout_tmplt; 1869 1870 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1871 1872 err = fl_hw_create_tmplt(chain, tmplt); 1873 if (err) 1874 goto errout_tmplt; 1875 1876 kfree(tb); 1877 return tmplt; 1878 1879 errout_tmplt: 1880 kfree(tmplt); 1881 errout_tb: 1882 kfree(tb); 1883 return ERR_PTR(err); 1884 } 1885 1886 static void fl_tmplt_destroy(void *tmplt_priv) 1887 { 1888 struct fl_flow_tmplt *tmplt = tmplt_priv; 1889 1890 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1891 kfree(tmplt); 1892 } 1893 1894 static int fl_dump_key_val(struct sk_buff *skb, 1895 void *val, int val_type, 1896 void *mask, int mask_type, int len) 1897 { 1898 int err; 1899 1900 if (!memchr_inv(mask, 0, len)) 1901 return 0; 1902 err = nla_put(skb, val_type, len, val); 1903 if (err) 1904 return err; 1905 if (mask_type != TCA_FLOWER_UNSPEC) { 1906 err = nla_put(skb, mask_type, len, mask); 1907 if (err) 1908 return err; 1909 } 1910 return 0; 1911 } 1912 1913 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 1914 struct fl_flow_key *mask) 1915 { 1916 if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN, 1917 &mask->tp_min.dst, TCA_FLOWER_UNSPEC, 1918 sizeof(key->tp_min.dst)) || 1919 fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX, 1920 &mask->tp_max.dst, TCA_FLOWER_UNSPEC, 1921 sizeof(key->tp_max.dst)) || 1922 fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN, 1923 &mask->tp_min.src, TCA_FLOWER_UNSPEC, 1924 sizeof(key->tp_min.src)) || 1925 fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX, 1926 &mask->tp_max.src, TCA_FLOWER_UNSPEC, 1927 sizeof(key->tp_max.src))) 1928 return -1; 1929 1930 return 0; 1931 } 1932 1933 static int fl_dump_key_mpls(struct sk_buff *skb, 1934 struct flow_dissector_key_mpls *mpls_key, 1935 struct flow_dissector_key_mpls *mpls_mask) 1936 { 1937 int err; 1938 1939 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1940 return 0; 1941 if (mpls_mask->mpls_ttl) { 1942 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1943 mpls_key->mpls_ttl); 1944 if (err) 1945 return err; 1946 } 1947 if (mpls_mask->mpls_tc) { 1948 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1949 mpls_key->mpls_tc); 1950 if (err) 1951 return err; 1952 } 1953 if (mpls_mask->mpls_label) { 1954 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1955 mpls_key->mpls_label); 1956 if (err) 1957 return err; 1958 } 1959 if (mpls_mask->mpls_bos) { 1960 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1961 mpls_key->mpls_bos); 1962 if (err) 1963 return err; 1964 } 1965 return 0; 1966 } 1967 1968 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1969 struct flow_dissector_key_ip *key, 1970 struct flow_dissector_key_ip *mask) 1971 { 1972 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1973 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1974 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1975 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1976 1977 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1978 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1979 return -1; 1980 1981 return 0; 1982 } 1983 1984 static int fl_dump_key_vlan(struct sk_buff *skb, 1985 int vlan_id_key, int vlan_prio_key, 1986 struct flow_dissector_key_vlan *vlan_key, 1987 struct flow_dissector_key_vlan *vlan_mask) 1988 { 1989 int err; 1990 1991 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1992 return 0; 1993 if (vlan_mask->vlan_id) { 1994 err = nla_put_u16(skb, vlan_id_key, 1995 vlan_key->vlan_id); 1996 if (err) 1997 return err; 1998 } 1999 if (vlan_mask->vlan_priority) { 2000 err = nla_put_u8(skb, vlan_prio_key, 2001 vlan_key->vlan_priority); 2002 if (err) 2003 return err; 2004 } 2005 return 0; 2006 } 2007 2008 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2009 u32 *flower_key, u32 *flower_mask, 2010 u32 flower_flag_bit, u32 dissector_flag_bit) 2011 { 2012 if (dissector_mask & dissector_flag_bit) { 2013 *flower_mask |= flower_flag_bit; 2014 if (dissector_key & dissector_flag_bit) 2015 *flower_key |= flower_flag_bit; 2016 } 2017 } 2018 2019 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2020 { 2021 u32 key, mask; 2022 __be32 _key, _mask; 2023 int err; 2024 2025 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2026 return 0; 2027 2028 key = 0; 2029 mask = 0; 2030 2031 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2032 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2033 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2034 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2035 FLOW_DIS_FIRST_FRAG); 2036 2037 _key = cpu_to_be32(key); 2038 _mask = cpu_to_be32(mask); 2039 2040 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2041 if (err) 2042 return err; 2043 2044 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2045 } 2046 2047 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2048 struct flow_dissector_key_enc_opts *enc_opts) 2049 { 2050 struct geneve_opt *opt; 2051 struct nlattr *nest; 2052 int opt_off = 0; 2053 2054 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2055 if (!nest) 2056 goto nla_put_failure; 2057 2058 while (enc_opts->len > opt_off) { 2059 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2060 2061 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2062 opt->opt_class)) 2063 goto nla_put_failure; 2064 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2065 opt->type)) 2066 goto nla_put_failure; 2067 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2068 opt->length * 4, opt->opt_data)) 2069 goto nla_put_failure; 2070 2071 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2072 } 2073 nla_nest_end(skb, nest); 2074 return 0; 2075 2076 nla_put_failure: 2077 nla_nest_cancel(skb, nest); 2078 return -EMSGSIZE; 2079 } 2080 2081 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2082 struct flow_dissector_key_enc_opts *enc_opts) 2083 { 2084 struct nlattr *nest; 2085 int err; 2086 2087 if (!enc_opts->len) 2088 return 0; 2089 2090 nest = nla_nest_start_noflag(skb, enc_opt_type); 2091 if (!nest) 2092 goto nla_put_failure; 2093 2094 switch (enc_opts->dst_opt_type) { 2095 case TUNNEL_GENEVE_OPT: 2096 err = fl_dump_key_geneve_opt(skb, enc_opts); 2097 if (err) 2098 goto nla_put_failure; 2099 break; 2100 default: 2101 goto nla_put_failure; 2102 } 2103 nla_nest_end(skb, nest); 2104 return 0; 2105 2106 nla_put_failure: 2107 nla_nest_cancel(skb, nest); 2108 return -EMSGSIZE; 2109 } 2110 2111 static int fl_dump_key_enc_opt(struct sk_buff *skb, 2112 struct flow_dissector_key_enc_opts *key_opts, 2113 struct flow_dissector_key_enc_opts *msk_opts) 2114 { 2115 int err; 2116 2117 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2118 if (err) 2119 return err; 2120 2121 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2122 } 2123 2124 static int fl_dump_key(struct sk_buff *skb, struct net *net, 2125 struct fl_flow_key *key, struct fl_flow_key *mask) 2126 { 2127 if (mask->meta.ingress_ifindex) { 2128 struct net_device *dev; 2129 2130 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 2131 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2132 goto nla_put_failure; 2133 } 2134 2135 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2136 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2137 sizeof(key->eth.dst)) || 2138 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2139 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2140 sizeof(key->eth.src)) || 2141 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2142 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2143 sizeof(key->basic.n_proto))) 2144 goto nla_put_failure; 2145 2146 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2147 goto nla_put_failure; 2148 2149 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 2150 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 2151 goto nla_put_failure; 2152 2153 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 2154 TCA_FLOWER_KEY_CVLAN_PRIO, 2155 &key->cvlan, &mask->cvlan) || 2156 (mask->cvlan.vlan_tpid && 2157 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2158 key->cvlan.vlan_tpid))) 2159 goto nla_put_failure; 2160 2161 if (mask->basic.n_proto) { 2162 if (mask->cvlan.vlan_tpid) { 2163 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 2164 key->basic.n_proto)) 2165 goto nla_put_failure; 2166 } else if (mask->vlan.vlan_tpid) { 2167 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2168 key->basic.n_proto)) 2169 goto nla_put_failure; 2170 } 2171 } 2172 2173 if ((key->basic.n_proto == htons(ETH_P_IP) || 2174 key->basic.n_proto == htons(ETH_P_IPV6)) && 2175 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 2176 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 2177 sizeof(key->basic.ip_proto)) || 2178 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 2179 goto nla_put_failure; 2180 2181 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2182 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 2183 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 2184 sizeof(key->ipv4.src)) || 2185 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 2186 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 2187 sizeof(key->ipv4.dst)))) 2188 goto nla_put_failure; 2189 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2190 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 2191 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 2192 sizeof(key->ipv6.src)) || 2193 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 2194 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 2195 sizeof(key->ipv6.dst)))) 2196 goto nla_put_failure; 2197 2198 if (key->basic.ip_proto == IPPROTO_TCP && 2199 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 2200 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 2201 sizeof(key->tp.src)) || 2202 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 2203 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 2204 sizeof(key->tp.dst)) || 2205 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 2206 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 2207 sizeof(key->tcp.flags)))) 2208 goto nla_put_failure; 2209 else if (key->basic.ip_proto == IPPROTO_UDP && 2210 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2211 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2212 sizeof(key->tp.src)) || 2213 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2214 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2215 sizeof(key->tp.dst)))) 2216 goto nla_put_failure; 2217 else if (key->basic.ip_proto == IPPROTO_SCTP && 2218 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2219 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2220 sizeof(key->tp.src)) || 2221 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2222 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2223 sizeof(key->tp.dst)))) 2224 goto nla_put_failure; 2225 else if (key->basic.n_proto == htons(ETH_P_IP) && 2226 key->basic.ip_proto == IPPROTO_ICMP && 2227 (fl_dump_key_val(skb, &key->icmp.type, 2228 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 2229 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2230 sizeof(key->icmp.type)) || 2231 fl_dump_key_val(skb, &key->icmp.code, 2232 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 2233 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2234 sizeof(key->icmp.code)))) 2235 goto nla_put_failure; 2236 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2237 key->basic.ip_proto == IPPROTO_ICMPV6 && 2238 (fl_dump_key_val(skb, &key->icmp.type, 2239 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 2240 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2241 sizeof(key->icmp.type)) || 2242 fl_dump_key_val(skb, &key->icmp.code, 2243 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 2244 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2245 sizeof(key->icmp.code)))) 2246 goto nla_put_failure; 2247 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 2248 key->basic.n_proto == htons(ETH_P_RARP)) && 2249 (fl_dump_key_val(skb, &key->arp.sip, 2250 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 2251 TCA_FLOWER_KEY_ARP_SIP_MASK, 2252 sizeof(key->arp.sip)) || 2253 fl_dump_key_val(skb, &key->arp.tip, 2254 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 2255 TCA_FLOWER_KEY_ARP_TIP_MASK, 2256 sizeof(key->arp.tip)) || 2257 fl_dump_key_val(skb, &key->arp.op, 2258 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 2259 TCA_FLOWER_KEY_ARP_OP_MASK, 2260 sizeof(key->arp.op)) || 2261 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2262 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2263 sizeof(key->arp.sha)) || 2264 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2265 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2266 sizeof(key->arp.tha)))) 2267 goto nla_put_failure; 2268 2269 if ((key->basic.ip_proto == IPPROTO_TCP || 2270 key->basic.ip_proto == IPPROTO_UDP || 2271 key->basic.ip_proto == IPPROTO_SCTP) && 2272 fl_dump_key_port_range(skb, key, mask)) 2273 goto nla_put_failure; 2274 2275 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2276 (fl_dump_key_val(skb, &key->enc_ipv4.src, 2277 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 2278 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2279 sizeof(key->enc_ipv4.src)) || 2280 fl_dump_key_val(skb, &key->enc_ipv4.dst, 2281 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 2282 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2283 sizeof(key->enc_ipv4.dst)))) 2284 goto nla_put_failure; 2285 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2286 (fl_dump_key_val(skb, &key->enc_ipv6.src, 2287 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 2288 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2289 sizeof(key->enc_ipv6.src)) || 2290 fl_dump_key_val(skb, &key->enc_ipv6.dst, 2291 TCA_FLOWER_KEY_ENC_IPV6_DST, 2292 &mask->enc_ipv6.dst, 2293 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2294 sizeof(key->enc_ipv6.dst)))) 2295 goto nla_put_failure; 2296 2297 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 2298 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 2299 sizeof(key->enc_key_id)) || 2300 fl_dump_key_val(skb, &key->enc_tp.src, 2301 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2302 &mask->enc_tp.src, 2303 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2304 sizeof(key->enc_tp.src)) || 2305 fl_dump_key_val(skb, &key->enc_tp.dst, 2306 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2307 &mask->enc_tp.dst, 2308 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2309 sizeof(key->enc_tp.dst)) || 2310 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 2311 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 2312 goto nla_put_failure; 2313 2314 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 2315 goto nla_put_failure; 2316 2317 return 0; 2318 2319 nla_put_failure: 2320 return -EMSGSIZE; 2321 } 2322 2323 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 2324 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 2325 { 2326 struct cls_fl_filter *f = fh; 2327 struct nlattr *nest; 2328 struct fl_flow_key *key, *mask; 2329 bool skip_hw; 2330 2331 if (!f) 2332 return skb->len; 2333 2334 t->tcm_handle = f->handle; 2335 2336 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2337 if (!nest) 2338 goto nla_put_failure; 2339 2340 spin_lock(&tp->lock); 2341 2342 if (f->res.classid && 2343 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 2344 goto nla_put_failure_locked; 2345 2346 key = &f->key; 2347 mask = &f->mask->key; 2348 skip_hw = tc_skip_hw(f->flags); 2349 2350 if (fl_dump_key(skb, net, key, mask)) 2351 goto nla_put_failure_locked; 2352 2353 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 2354 goto nla_put_failure_locked; 2355 2356 spin_unlock(&tp->lock); 2357 2358 if (!skip_hw) 2359 fl_hw_update_stats(tp, f, rtnl_held); 2360 2361 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 2362 goto nla_put_failure; 2363 2364 if (tcf_exts_dump(skb, &f->exts)) 2365 goto nla_put_failure; 2366 2367 nla_nest_end(skb, nest); 2368 2369 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 2370 goto nla_put_failure; 2371 2372 return skb->len; 2373 2374 nla_put_failure_locked: 2375 spin_unlock(&tp->lock); 2376 nla_put_failure: 2377 nla_nest_cancel(skb, nest); 2378 return -1; 2379 } 2380 2381 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 2382 { 2383 struct fl_flow_tmplt *tmplt = tmplt_priv; 2384 struct fl_flow_key *key, *mask; 2385 struct nlattr *nest; 2386 2387 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2388 if (!nest) 2389 goto nla_put_failure; 2390 2391 key = &tmplt->dummy_key; 2392 mask = &tmplt->mask; 2393 2394 if (fl_dump_key(skb, net, key, mask)) 2395 goto nla_put_failure; 2396 2397 nla_nest_end(skb, nest); 2398 2399 return skb->len; 2400 2401 nla_put_failure: 2402 nla_nest_cancel(skb, nest); 2403 return -EMSGSIZE; 2404 } 2405 2406 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 2407 { 2408 struct cls_fl_filter *f = fh; 2409 2410 if (f && f->res.classid == classid) 2411 f->res.class = cl; 2412 } 2413 2414 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 2415 .kind = "flower", 2416 .classify = fl_classify, 2417 .init = fl_init, 2418 .destroy = fl_destroy, 2419 .get = fl_get, 2420 .put = fl_put, 2421 .change = fl_change, 2422 .delete = fl_delete, 2423 .walk = fl_walk, 2424 .reoffload = fl_reoffload, 2425 .dump = fl_dump, 2426 .bind_class = fl_bind_class, 2427 .tmplt_create = fl_tmplt_create, 2428 .tmplt_destroy = fl_tmplt_destroy, 2429 .tmplt_dump = fl_tmplt_dump, 2430 .owner = THIS_MODULE, 2431 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 2432 }; 2433 2434 static int __init cls_fl_init(void) 2435 { 2436 return register_tcf_proto_ops(&cls_fl_ops); 2437 } 2438 2439 static void __exit cls_fl_exit(void) 2440 { 2441 unregister_tcf_proto_ops(&cls_fl_ops); 2442 } 2443 2444 module_init(cls_fl_init); 2445 module_exit(cls_fl_exit); 2446 2447 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 2448 MODULE_DESCRIPTION("Flower classifier"); 2449 MODULE_LICENSE("GPL v2"); 2450