1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * net/sched/cls_flower.c Flower classifier 4 * 5 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/init.h> 10 #include <linux/module.h> 11 #include <linux/rhashtable.h> 12 #include <linux/workqueue.h> 13 #include <linux/refcount.h> 14 15 #include <linux/if_ether.h> 16 #include <linux/in6.h> 17 #include <linux/ip.h> 18 #include <linux/mpls.h> 19 20 #include <net/sch_generic.h> 21 #include <net/pkt_cls.h> 22 #include <net/ip.h> 23 #include <net/flow_dissector.h> 24 #include <net/geneve.h> 25 #include <net/vxlan.h> 26 #include <net/erspan.h> 27 28 #include <net/dst.h> 29 #include <net/dst_metadata.h> 30 31 #include <uapi/linux/netfilter/nf_conntrack_common.h> 32 33 #define TCA_FLOWER_KEY_CT_FLAGS_MAX \ 34 ((__TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) << 1) 35 #define TCA_FLOWER_KEY_CT_FLAGS_MASK \ 36 (TCA_FLOWER_KEY_CT_FLAGS_MAX - 1) 37 38 struct fl_flow_key { 39 struct flow_dissector_key_meta meta; 40 struct flow_dissector_key_control control; 41 struct flow_dissector_key_control enc_control; 42 struct flow_dissector_key_basic basic; 43 struct flow_dissector_key_eth_addrs eth; 44 struct flow_dissector_key_vlan vlan; 45 struct flow_dissector_key_vlan cvlan; 46 union { 47 struct flow_dissector_key_ipv4_addrs ipv4; 48 struct flow_dissector_key_ipv6_addrs ipv6; 49 }; 50 struct flow_dissector_key_ports tp; 51 struct flow_dissector_key_icmp icmp; 52 struct flow_dissector_key_arp arp; 53 struct flow_dissector_key_keyid enc_key_id; 54 union { 55 struct flow_dissector_key_ipv4_addrs enc_ipv4; 56 struct flow_dissector_key_ipv6_addrs enc_ipv6; 57 }; 58 struct flow_dissector_key_ports enc_tp; 59 struct flow_dissector_key_mpls mpls; 60 struct flow_dissector_key_tcp tcp; 61 struct flow_dissector_key_ip ip; 62 struct flow_dissector_key_ip enc_ip; 63 struct flow_dissector_key_enc_opts enc_opts; 64 union { 65 struct flow_dissector_key_ports tp; 66 struct { 67 struct flow_dissector_key_ports tp_min; 68 struct flow_dissector_key_ports tp_max; 69 }; 70 } tp_range; 71 struct flow_dissector_key_ct ct; 72 struct flow_dissector_key_hash hash; 73 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 74 75 struct fl_flow_mask_range { 76 unsigned short int start; 77 unsigned short int end; 78 }; 79 80 struct fl_flow_mask { 81 struct fl_flow_key key; 82 struct fl_flow_mask_range range; 83 u32 flags; 84 struct rhash_head ht_node; 85 struct rhashtable ht; 86 struct rhashtable_params filter_ht_params; 87 struct flow_dissector dissector; 88 struct list_head filters; 89 struct rcu_work rwork; 90 struct list_head list; 91 refcount_t refcnt; 92 }; 93 94 struct fl_flow_tmplt { 95 struct fl_flow_key dummy_key; 96 struct fl_flow_key mask; 97 struct flow_dissector dissector; 98 struct tcf_chain *chain; 99 }; 100 101 struct cls_fl_head { 102 struct rhashtable ht; 103 spinlock_t masks_lock; /* Protect masks list */ 104 struct list_head masks; 105 struct list_head hw_filters; 106 struct rcu_work rwork; 107 struct idr handle_idr; 108 }; 109 110 struct cls_fl_filter { 111 struct fl_flow_mask *mask; 112 struct rhash_head ht_node; 113 struct fl_flow_key mkey; 114 struct tcf_exts exts; 115 struct tcf_result res; 116 struct fl_flow_key key; 117 struct list_head list; 118 struct list_head hw_list; 119 u32 handle; 120 u32 flags; 121 u32 in_hw_count; 122 struct rcu_work rwork; 123 struct net_device *hw_dev; 124 /* Flower classifier is unlocked, which means that its reference counter 125 * can be changed concurrently without any kind of external 126 * synchronization. Use atomic reference counter to be concurrency-safe. 127 */ 128 refcount_t refcnt; 129 bool deleted; 130 }; 131 132 static const struct rhashtable_params mask_ht_params = { 133 .key_offset = offsetof(struct fl_flow_mask, key), 134 .key_len = sizeof(struct fl_flow_key), 135 .head_offset = offsetof(struct fl_flow_mask, ht_node), 136 .automatic_shrinking = true, 137 }; 138 139 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 140 { 141 return mask->range.end - mask->range.start; 142 } 143 144 static void fl_mask_update_range(struct fl_flow_mask *mask) 145 { 146 const u8 *bytes = (const u8 *) &mask->key; 147 size_t size = sizeof(mask->key); 148 size_t i, first = 0, last; 149 150 for (i = 0; i < size; i++) { 151 if (bytes[i]) { 152 first = i; 153 break; 154 } 155 } 156 last = first; 157 for (i = size - 1; i != first; i--) { 158 if (bytes[i]) { 159 last = i; 160 break; 161 } 162 } 163 mask->range.start = rounddown(first, sizeof(long)); 164 mask->range.end = roundup(last + 1, sizeof(long)); 165 } 166 167 static void *fl_key_get_start(struct fl_flow_key *key, 168 const struct fl_flow_mask *mask) 169 { 170 return (u8 *) key + mask->range.start; 171 } 172 173 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 174 struct fl_flow_mask *mask) 175 { 176 const long *lkey = fl_key_get_start(key, mask); 177 const long *lmask = fl_key_get_start(&mask->key, mask); 178 long *lmkey = fl_key_get_start(mkey, mask); 179 int i; 180 181 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 182 *lmkey++ = *lkey++ & *lmask++; 183 } 184 185 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 186 struct fl_flow_mask *mask) 187 { 188 const long *lmask = fl_key_get_start(&mask->key, mask); 189 const long *ltmplt; 190 int i; 191 192 if (!tmplt) 193 return true; 194 ltmplt = fl_key_get_start(&tmplt->mask, mask); 195 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 196 if (~*ltmplt++ & *lmask++) 197 return false; 198 } 199 return true; 200 } 201 202 static void fl_clear_masked_range(struct fl_flow_key *key, 203 struct fl_flow_mask *mask) 204 { 205 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 206 } 207 208 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 209 struct fl_flow_key *key, 210 struct fl_flow_key *mkey) 211 { 212 __be16 min_mask, max_mask, min_val, max_val; 213 214 min_mask = htons(filter->mask->key.tp_range.tp_min.dst); 215 max_mask = htons(filter->mask->key.tp_range.tp_max.dst); 216 min_val = htons(filter->key.tp_range.tp_min.dst); 217 max_val = htons(filter->key.tp_range.tp_max.dst); 218 219 if (min_mask && max_mask) { 220 if (htons(key->tp_range.tp.dst) < min_val || 221 htons(key->tp_range.tp.dst) > max_val) 222 return false; 223 224 /* skb does not have min and max values */ 225 mkey->tp_range.tp_min.dst = filter->mkey.tp_range.tp_min.dst; 226 mkey->tp_range.tp_max.dst = filter->mkey.tp_range.tp_max.dst; 227 } 228 return true; 229 } 230 231 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 232 struct fl_flow_key *key, 233 struct fl_flow_key *mkey) 234 { 235 __be16 min_mask, max_mask, min_val, max_val; 236 237 min_mask = htons(filter->mask->key.tp_range.tp_min.src); 238 max_mask = htons(filter->mask->key.tp_range.tp_max.src); 239 min_val = htons(filter->key.tp_range.tp_min.src); 240 max_val = htons(filter->key.tp_range.tp_max.src); 241 242 if (min_mask && max_mask) { 243 if (htons(key->tp_range.tp.src) < min_val || 244 htons(key->tp_range.tp.src) > max_val) 245 return false; 246 247 /* skb does not have min and max values */ 248 mkey->tp_range.tp_min.src = filter->mkey.tp_range.tp_min.src; 249 mkey->tp_range.tp_max.src = filter->mkey.tp_range.tp_max.src; 250 } 251 return true; 252 } 253 254 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 255 struct fl_flow_key *mkey) 256 { 257 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 258 mask->filter_ht_params); 259 } 260 261 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 262 struct fl_flow_key *mkey, 263 struct fl_flow_key *key) 264 { 265 struct cls_fl_filter *filter, *f; 266 267 list_for_each_entry_rcu(filter, &mask->filters, list) { 268 if (!fl_range_port_dst_cmp(filter, key, mkey)) 269 continue; 270 271 if (!fl_range_port_src_cmp(filter, key, mkey)) 272 continue; 273 274 f = __fl_lookup(mask, mkey); 275 if (f) 276 return f; 277 } 278 return NULL; 279 } 280 281 static noinline_for_stack 282 struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_key *key) 283 { 284 struct fl_flow_key mkey; 285 286 fl_set_masked_key(&mkey, key, mask); 287 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 288 return fl_lookup_range(mask, &mkey, key); 289 290 return __fl_lookup(mask, &mkey); 291 } 292 293 static u16 fl_ct_info_to_flower_map[] = { 294 [IP_CT_ESTABLISHED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 295 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED, 296 [IP_CT_RELATED] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 297 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 298 [IP_CT_ESTABLISHED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 299 TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED | 300 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 301 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 302 TCA_FLOWER_KEY_CT_FLAGS_RELATED | 303 TCA_FLOWER_KEY_CT_FLAGS_REPLY, 304 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 305 TCA_FLOWER_KEY_CT_FLAGS_NEW, 306 }; 307 308 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 309 struct tcf_result *res) 310 { 311 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 312 bool post_ct = qdisc_skb_cb(skb)->post_ct; 313 struct fl_flow_key skb_key; 314 struct fl_flow_mask *mask; 315 struct cls_fl_filter *f; 316 317 list_for_each_entry_rcu(mask, &head->masks, list) { 318 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 319 fl_clear_masked_range(&skb_key, mask); 320 321 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 322 /* skb_flow_dissect() does not set n_proto in case an unknown 323 * protocol, so do it rather here. 324 */ 325 skb_key.basic.n_proto = skb_protocol(skb, false); 326 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 327 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 328 fl_ct_info_to_flower_map, 329 ARRAY_SIZE(fl_ct_info_to_flower_map), 330 post_ct); 331 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 332 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 333 334 f = fl_mask_lookup(mask, &skb_key); 335 if (f && !tc_skip_sw(f->flags)) { 336 *res = f->res; 337 return tcf_exts_exec(skb, &f->exts, res); 338 } 339 } 340 return -1; 341 } 342 343 static int fl_init(struct tcf_proto *tp) 344 { 345 struct cls_fl_head *head; 346 347 head = kzalloc(sizeof(*head), GFP_KERNEL); 348 if (!head) 349 return -ENOBUFS; 350 351 spin_lock_init(&head->masks_lock); 352 INIT_LIST_HEAD_RCU(&head->masks); 353 INIT_LIST_HEAD(&head->hw_filters); 354 rcu_assign_pointer(tp->root, head); 355 idr_init(&head->handle_idr); 356 357 return rhashtable_init(&head->ht, &mask_ht_params); 358 } 359 360 static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 361 { 362 /* temporary masks don't have their filters list and ht initialized */ 363 if (mask_init_done) { 364 WARN_ON(!list_empty(&mask->filters)); 365 rhashtable_destroy(&mask->ht); 366 } 367 kfree(mask); 368 } 369 370 static void fl_mask_free_work(struct work_struct *work) 371 { 372 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 373 struct fl_flow_mask, rwork); 374 375 fl_mask_free(mask, true); 376 } 377 378 static void fl_uninit_mask_free_work(struct work_struct *work) 379 { 380 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 381 struct fl_flow_mask, rwork); 382 383 fl_mask_free(mask, false); 384 } 385 386 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 387 { 388 if (!refcount_dec_and_test(&mask->refcnt)) 389 return false; 390 391 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 392 393 spin_lock(&head->masks_lock); 394 list_del_rcu(&mask->list); 395 spin_unlock(&head->masks_lock); 396 397 tcf_queue_work(&mask->rwork, fl_mask_free_work); 398 399 return true; 400 } 401 402 static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 403 { 404 /* Flower classifier only changes root pointer during init and destroy. 405 * Users must obtain reference to tcf_proto instance before calling its 406 * API, so tp->root pointer is protected from concurrent call to 407 * fl_destroy() by reference counting. 408 */ 409 return rcu_dereference_raw(tp->root); 410 } 411 412 static void __fl_destroy_filter(struct cls_fl_filter *f) 413 { 414 tcf_exts_destroy(&f->exts); 415 tcf_exts_put_net(&f->exts); 416 kfree(f); 417 } 418 419 static void fl_destroy_filter_work(struct work_struct *work) 420 { 421 struct cls_fl_filter *f = container_of(to_rcu_work(work), 422 struct cls_fl_filter, rwork); 423 424 __fl_destroy_filter(f); 425 } 426 427 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 428 bool rtnl_held, struct netlink_ext_ack *extack) 429 { 430 struct tcf_block *block = tp->chain->block; 431 struct flow_cls_offload cls_flower = {}; 432 433 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 434 cls_flower.command = FLOW_CLS_DESTROY; 435 cls_flower.cookie = (unsigned long) f; 436 437 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 438 &f->flags, &f->in_hw_count, rtnl_held); 439 440 } 441 442 static int fl_hw_replace_filter(struct tcf_proto *tp, 443 struct cls_fl_filter *f, bool rtnl_held, 444 struct netlink_ext_ack *extack) 445 { 446 struct tcf_block *block = tp->chain->block; 447 struct flow_cls_offload cls_flower = {}; 448 bool skip_sw = tc_skip_sw(f->flags); 449 int err = 0; 450 451 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 452 if (!cls_flower.rule) 453 return -ENOMEM; 454 455 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 456 cls_flower.command = FLOW_CLS_REPLACE; 457 cls_flower.cookie = (unsigned long) f; 458 cls_flower.rule->match.dissector = &f->mask->dissector; 459 cls_flower.rule->match.mask = &f->mask->key; 460 cls_flower.rule->match.key = &f->mkey; 461 cls_flower.classid = f->res.classid; 462 463 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 464 if (err) { 465 kfree(cls_flower.rule); 466 if (skip_sw) { 467 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 468 return err; 469 } 470 return 0; 471 } 472 473 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 474 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 475 tc_cleanup_flow_action(&cls_flower.rule->action); 476 kfree(cls_flower.rule); 477 478 if (err) { 479 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 480 return err; 481 } 482 483 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 484 return -EINVAL; 485 486 return 0; 487 } 488 489 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 490 bool rtnl_held) 491 { 492 struct tcf_block *block = tp->chain->block; 493 struct flow_cls_offload cls_flower = {}; 494 495 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 496 cls_flower.command = FLOW_CLS_STATS; 497 cls_flower.cookie = (unsigned long) f; 498 cls_flower.classid = f->res.classid; 499 500 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 501 rtnl_held); 502 503 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes, 504 cls_flower.stats.pkts, 505 cls_flower.stats.drops, 506 cls_flower.stats.lastused, 507 cls_flower.stats.used_hw_stats, 508 cls_flower.stats.used_hw_stats_valid); 509 } 510 511 static void __fl_put(struct cls_fl_filter *f) 512 { 513 if (!refcount_dec_and_test(&f->refcnt)) 514 return; 515 516 if (tcf_exts_get_net(&f->exts)) 517 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 518 else 519 __fl_destroy_filter(f); 520 } 521 522 static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 523 { 524 struct cls_fl_filter *f; 525 526 rcu_read_lock(); 527 f = idr_find(&head->handle_idr, handle); 528 if (f && !refcount_inc_not_zero(&f->refcnt)) 529 f = NULL; 530 rcu_read_unlock(); 531 532 return f; 533 } 534 535 static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 536 bool *last, bool rtnl_held, 537 struct netlink_ext_ack *extack) 538 { 539 struct cls_fl_head *head = fl_head_dereference(tp); 540 541 *last = false; 542 543 spin_lock(&tp->lock); 544 if (f->deleted) { 545 spin_unlock(&tp->lock); 546 return -ENOENT; 547 } 548 549 f->deleted = true; 550 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 551 f->mask->filter_ht_params); 552 idr_remove(&head->handle_idr, f->handle); 553 list_del_rcu(&f->list); 554 spin_unlock(&tp->lock); 555 556 *last = fl_mask_put(head, f->mask); 557 if (!tc_skip_hw(f->flags)) 558 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 559 tcf_unbind_filter(tp, &f->res); 560 __fl_put(f); 561 562 return 0; 563 } 564 565 static void fl_destroy_sleepable(struct work_struct *work) 566 { 567 struct cls_fl_head *head = container_of(to_rcu_work(work), 568 struct cls_fl_head, 569 rwork); 570 571 rhashtable_destroy(&head->ht); 572 kfree(head); 573 module_put(THIS_MODULE); 574 } 575 576 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 577 struct netlink_ext_ack *extack) 578 { 579 struct cls_fl_head *head = fl_head_dereference(tp); 580 struct fl_flow_mask *mask, *next_mask; 581 struct cls_fl_filter *f, *next; 582 bool last; 583 584 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 585 list_for_each_entry_safe(f, next, &mask->filters, list) { 586 __fl_delete(tp, f, &last, rtnl_held, extack); 587 if (last) 588 break; 589 } 590 } 591 idr_destroy(&head->handle_idr); 592 593 __module_get(THIS_MODULE); 594 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 595 } 596 597 static void fl_put(struct tcf_proto *tp, void *arg) 598 { 599 struct cls_fl_filter *f = arg; 600 601 __fl_put(f); 602 } 603 604 static void *fl_get(struct tcf_proto *tp, u32 handle) 605 { 606 struct cls_fl_head *head = fl_head_dereference(tp); 607 608 return __fl_get(head, handle); 609 } 610 611 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 612 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 613 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 614 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 615 .len = IFNAMSIZ }, 616 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 617 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 618 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 619 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 620 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 621 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 622 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 623 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 624 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 625 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 626 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 627 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 628 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 629 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 630 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 631 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 632 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 633 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 634 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 635 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 636 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 637 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 638 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 639 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 640 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 641 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 642 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 643 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 644 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 645 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 646 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 648 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 649 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 650 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 651 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 652 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 653 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 654 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 655 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 656 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 657 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 658 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 659 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 660 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 661 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 662 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 663 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 664 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 665 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 666 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 667 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 668 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 669 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 670 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 671 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 672 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 673 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 674 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 675 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 676 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 677 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 678 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 679 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 680 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 681 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 682 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 683 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 684 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 685 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 686 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 687 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 688 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 689 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 690 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 692 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 693 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 694 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 695 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 696 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 697 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 698 [TCA_FLOWER_KEY_CT_STATE] = 699 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 700 [TCA_FLOWER_KEY_CT_STATE_MASK] = 701 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 702 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 703 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 704 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 705 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 706 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 707 .len = 128 / BITS_PER_BYTE }, 708 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 709 .len = 128 / BITS_PER_BYTE }, 710 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 711 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 712 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 713 714 }; 715 716 static const struct nla_policy 717 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 718 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 719 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 720 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 721 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 722 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 723 }; 724 725 static const struct nla_policy 726 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 727 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 728 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 729 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 730 .len = 128 }, 731 }; 732 733 static const struct nla_policy 734 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 735 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 736 }; 737 738 static const struct nla_policy 739 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 740 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 741 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 742 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 743 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 744 }; 745 746 static const struct nla_policy 747 mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 748 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 749 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 750 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 751 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 752 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 753 }; 754 755 static void fl_set_key_val(struct nlattr **tb, 756 void *val, int val_type, 757 void *mask, int mask_type, int len) 758 { 759 if (!tb[val_type]) 760 return; 761 nla_memcpy(val, tb[val_type], len); 762 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 763 memset(mask, 0xff, len); 764 else 765 nla_memcpy(mask, tb[mask_type], len); 766 } 767 768 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 769 struct fl_flow_key *mask, 770 struct netlink_ext_ack *extack) 771 { 772 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 773 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 774 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 775 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 776 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 777 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 778 fl_set_key_val(tb, &key->tp_range.tp_min.src, 779 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 780 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 781 fl_set_key_val(tb, &key->tp_range.tp_max.src, 782 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 783 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 784 785 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 786 htons(key->tp_range.tp_max.dst) <= 787 htons(key->tp_range.tp_min.dst)) { 788 NL_SET_ERR_MSG_ATTR(extack, 789 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 790 "Invalid destination port range (min must be strictly smaller than max)"); 791 return -EINVAL; 792 } 793 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 794 htons(key->tp_range.tp_max.src) <= 795 htons(key->tp_range.tp_min.src)) { 796 NL_SET_ERR_MSG_ATTR(extack, 797 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 798 "Invalid source port range (min must be strictly smaller than max)"); 799 return -EINVAL; 800 } 801 802 return 0; 803 } 804 805 static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 806 struct flow_dissector_key_mpls *key_val, 807 struct flow_dissector_key_mpls *key_mask, 808 struct netlink_ext_ack *extack) 809 { 810 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 811 struct flow_dissector_mpls_lse *lse_mask; 812 struct flow_dissector_mpls_lse *lse_val; 813 u8 lse_index; 814 u8 depth; 815 int err; 816 817 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 818 mpls_stack_entry_policy, extack); 819 if (err < 0) 820 return err; 821 822 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 823 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 824 return -EINVAL; 825 } 826 827 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 828 829 /* LSE depth starts at 1, for consistency with terminology used by 830 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 831 */ 832 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 833 NL_SET_ERR_MSG_ATTR(extack, 834 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 835 "Invalid MPLS depth"); 836 return -EINVAL; 837 } 838 lse_index = depth - 1; 839 840 dissector_set_mpls_lse(key_val, lse_index); 841 dissector_set_mpls_lse(key_mask, lse_index); 842 843 lse_val = &key_val->ls[lse_index]; 844 lse_mask = &key_mask->ls[lse_index]; 845 846 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 847 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 848 lse_mask->mpls_ttl = MPLS_TTL_MASK; 849 } 850 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 851 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 852 853 if (bos & ~MPLS_BOS_MASK) { 854 NL_SET_ERR_MSG_ATTR(extack, 855 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 856 "Bottom Of Stack (BOS) must be 0 or 1"); 857 return -EINVAL; 858 } 859 lse_val->mpls_bos = bos; 860 lse_mask->mpls_bos = MPLS_BOS_MASK; 861 } 862 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 863 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 864 865 if (tc & ~MPLS_TC_MASK) { 866 NL_SET_ERR_MSG_ATTR(extack, 867 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 868 "Traffic Class (TC) must be between 0 and 7"); 869 return -EINVAL; 870 } 871 lse_val->mpls_tc = tc; 872 lse_mask->mpls_tc = MPLS_TC_MASK; 873 } 874 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 875 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 876 877 if (label & ~MPLS_LABEL_MASK) { 878 NL_SET_ERR_MSG_ATTR(extack, 879 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 880 "Label must be between 0 and 1048575"); 881 return -EINVAL; 882 } 883 lse_val->mpls_label = label; 884 lse_mask->mpls_label = MPLS_LABEL_MASK; 885 } 886 887 return 0; 888 } 889 890 static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 891 struct flow_dissector_key_mpls *key_val, 892 struct flow_dissector_key_mpls *key_mask, 893 struct netlink_ext_ack *extack) 894 { 895 struct nlattr *nla_lse; 896 int rem; 897 int err; 898 899 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 900 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 901 "NLA_F_NESTED is missing"); 902 return -EINVAL; 903 } 904 905 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 906 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 907 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 908 "Invalid MPLS option type"); 909 return -EINVAL; 910 } 911 912 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 913 if (err < 0) 914 return err; 915 } 916 if (rem) { 917 NL_SET_ERR_MSG(extack, 918 "Bytes leftover after parsing MPLS options"); 919 return -EINVAL; 920 } 921 922 return 0; 923 } 924 925 static int fl_set_key_mpls(struct nlattr **tb, 926 struct flow_dissector_key_mpls *key_val, 927 struct flow_dissector_key_mpls *key_mask, 928 struct netlink_ext_ack *extack) 929 { 930 struct flow_dissector_mpls_lse *lse_mask; 931 struct flow_dissector_mpls_lse *lse_val; 932 933 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 934 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 935 tb[TCA_FLOWER_KEY_MPLS_BOS] || 936 tb[TCA_FLOWER_KEY_MPLS_TC] || 937 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 938 NL_SET_ERR_MSG_ATTR(extack, 939 tb[TCA_FLOWER_KEY_MPLS_OPTS], 940 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 941 return -EBADMSG; 942 } 943 944 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 945 key_val, key_mask, extack); 946 } 947 948 lse_val = &key_val->ls[0]; 949 lse_mask = &key_mask->ls[0]; 950 951 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 952 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 953 lse_mask->mpls_ttl = MPLS_TTL_MASK; 954 dissector_set_mpls_lse(key_val, 0); 955 dissector_set_mpls_lse(key_mask, 0); 956 } 957 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 958 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 959 960 if (bos & ~MPLS_BOS_MASK) { 961 NL_SET_ERR_MSG_ATTR(extack, 962 tb[TCA_FLOWER_KEY_MPLS_BOS], 963 "Bottom Of Stack (BOS) must be 0 or 1"); 964 return -EINVAL; 965 } 966 lse_val->mpls_bos = bos; 967 lse_mask->mpls_bos = MPLS_BOS_MASK; 968 dissector_set_mpls_lse(key_val, 0); 969 dissector_set_mpls_lse(key_mask, 0); 970 } 971 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 972 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 973 974 if (tc & ~MPLS_TC_MASK) { 975 NL_SET_ERR_MSG_ATTR(extack, 976 tb[TCA_FLOWER_KEY_MPLS_TC], 977 "Traffic Class (TC) must be between 0 and 7"); 978 return -EINVAL; 979 } 980 lse_val->mpls_tc = tc; 981 lse_mask->mpls_tc = MPLS_TC_MASK; 982 dissector_set_mpls_lse(key_val, 0); 983 dissector_set_mpls_lse(key_mask, 0); 984 } 985 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 986 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 987 988 if (label & ~MPLS_LABEL_MASK) { 989 NL_SET_ERR_MSG_ATTR(extack, 990 tb[TCA_FLOWER_KEY_MPLS_LABEL], 991 "Label must be between 0 and 1048575"); 992 return -EINVAL; 993 } 994 lse_val->mpls_label = label; 995 lse_mask->mpls_label = MPLS_LABEL_MASK; 996 dissector_set_mpls_lse(key_val, 0); 997 dissector_set_mpls_lse(key_mask, 0); 998 } 999 return 0; 1000 } 1001 1002 static void fl_set_key_vlan(struct nlattr **tb, 1003 __be16 ethertype, 1004 int vlan_id_key, int vlan_prio_key, 1005 struct flow_dissector_key_vlan *key_val, 1006 struct flow_dissector_key_vlan *key_mask) 1007 { 1008 #define VLAN_PRIORITY_MASK 0x7 1009 1010 if (tb[vlan_id_key]) { 1011 key_val->vlan_id = 1012 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1013 key_mask->vlan_id = VLAN_VID_MASK; 1014 } 1015 if (tb[vlan_prio_key]) { 1016 key_val->vlan_priority = 1017 nla_get_u8(tb[vlan_prio_key]) & 1018 VLAN_PRIORITY_MASK; 1019 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1020 } 1021 key_val->vlan_tpid = ethertype; 1022 key_mask->vlan_tpid = cpu_to_be16(~0); 1023 } 1024 1025 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1026 u32 *dissector_key, u32 *dissector_mask, 1027 u32 flower_flag_bit, u32 dissector_flag_bit) 1028 { 1029 if (flower_mask & flower_flag_bit) { 1030 *dissector_mask |= dissector_flag_bit; 1031 if (flower_key & flower_flag_bit) 1032 *dissector_key |= dissector_flag_bit; 1033 } 1034 } 1035 1036 static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1037 u32 *flags_mask, struct netlink_ext_ack *extack) 1038 { 1039 u32 key, mask; 1040 1041 /* mask is mandatory for flags */ 1042 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1043 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1044 return -EINVAL; 1045 } 1046 1047 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 1048 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1049 1050 *flags_key = 0; 1051 *flags_mask = 0; 1052 1053 fl_set_key_flag(key, mask, flags_key, flags_mask, 1054 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1055 fl_set_key_flag(key, mask, flags_key, flags_mask, 1056 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1057 FLOW_DIS_FIRST_FRAG); 1058 1059 return 0; 1060 } 1061 1062 static void fl_set_key_ip(struct nlattr **tb, bool encap, 1063 struct flow_dissector_key_ip *key, 1064 struct flow_dissector_key_ip *mask) 1065 { 1066 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1067 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1068 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1069 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1070 1071 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1072 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1073 } 1074 1075 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1076 int depth, int option_len, 1077 struct netlink_ext_ack *extack) 1078 { 1079 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1080 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1081 struct geneve_opt *opt; 1082 int err, data_len = 0; 1083 1084 if (option_len > sizeof(struct geneve_opt)) 1085 data_len = option_len - sizeof(struct geneve_opt); 1086 1087 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1088 memset(opt, 0xff, option_len); 1089 opt->length = data_len / 4; 1090 opt->r1 = 0; 1091 opt->r2 = 0; 1092 opt->r3 = 0; 1093 1094 /* If no mask has been prodived we assume an exact match. */ 1095 if (!depth) 1096 return sizeof(struct geneve_opt) + data_len; 1097 1098 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1099 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1100 return -EINVAL; 1101 } 1102 1103 err = nla_parse_nested_deprecated(tb, 1104 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1105 nla, geneve_opt_policy, extack); 1106 if (err < 0) 1107 return err; 1108 1109 /* We are not allowed to omit any of CLASS, TYPE or DATA 1110 * fields from the key. 1111 */ 1112 if (!option_len && 1113 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1114 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1115 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1116 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1117 return -EINVAL; 1118 } 1119 1120 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1121 * for the mask. 1122 */ 1123 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1124 int new_len = key->enc_opts.len; 1125 1126 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1127 data_len = nla_len(data); 1128 if (data_len < 4) { 1129 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1130 return -ERANGE; 1131 } 1132 if (data_len % 4) { 1133 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1134 return -ERANGE; 1135 } 1136 1137 new_len += sizeof(struct geneve_opt) + data_len; 1138 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1139 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1140 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1141 return -ERANGE; 1142 } 1143 opt->length = data_len / 4; 1144 memcpy(opt->opt_data, nla_data(data), data_len); 1145 } 1146 1147 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1148 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1149 opt->opt_class = nla_get_be16(class); 1150 } 1151 1152 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1153 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1154 opt->type = nla_get_u8(type); 1155 } 1156 1157 return sizeof(struct geneve_opt) + data_len; 1158 } 1159 1160 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1161 int depth, int option_len, 1162 struct netlink_ext_ack *extack) 1163 { 1164 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1165 struct vxlan_metadata *md; 1166 int err; 1167 1168 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1169 memset(md, 0xff, sizeof(*md)); 1170 1171 if (!depth) 1172 return sizeof(*md); 1173 1174 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1175 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1176 return -EINVAL; 1177 } 1178 1179 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1180 vxlan_opt_policy, extack); 1181 if (err < 0) 1182 return err; 1183 1184 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1185 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1186 return -EINVAL; 1187 } 1188 1189 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1190 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1191 md->gbp &= VXLAN_GBP_MASK; 1192 } 1193 1194 return sizeof(*md); 1195 } 1196 1197 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1198 int depth, int option_len, 1199 struct netlink_ext_ack *extack) 1200 { 1201 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1202 struct erspan_metadata *md; 1203 int err; 1204 1205 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1206 memset(md, 0xff, sizeof(*md)); 1207 md->version = 1; 1208 1209 if (!depth) 1210 return sizeof(*md); 1211 1212 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1213 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1214 return -EINVAL; 1215 } 1216 1217 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1218 erspan_opt_policy, extack); 1219 if (err < 0) 1220 return err; 1221 1222 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1223 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1224 return -EINVAL; 1225 } 1226 1227 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1228 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1229 1230 if (md->version == 1) { 1231 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1232 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1233 return -EINVAL; 1234 } 1235 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1236 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1237 memset(&md->u, 0x00, sizeof(md->u)); 1238 md->u.index = nla_get_be32(nla); 1239 } 1240 } else if (md->version == 2) { 1241 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1242 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1243 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1244 return -EINVAL; 1245 } 1246 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1247 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1248 md->u.md2.dir = nla_get_u8(nla); 1249 } 1250 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1251 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1252 set_hwid(&md->u.md2, nla_get_u8(nla)); 1253 } 1254 } else { 1255 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1256 return -EINVAL; 1257 } 1258 1259 return sizeof(*md); 1260 } 1261 1262 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1263 struct fl_flow_key *mask, 1264 struct netlink_ext_ack *extack) 1265 { 1266 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1267 int err, option_len, key_depth, msk_depth = 0; 1268 1269 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1270 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1271 enc_opts_policy, extack); 1272 if (err) 1273 return err; 1274 1275 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1276 1277 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1278 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1279 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1280 enc_opts_policy, extack); 1281 if (err) 1282 return err; 1283 1284 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1285 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1286 if (!nla_ok(nla_opt_msk, msk_depth)) { 1287 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1288 return -EINVAL; 1289 } 1290 } 1291 1292 nla_for_each_attr(nla_opt_key, nla_enc_key, 1293 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1294 switch (nla_type(nla_opt_key)) { 1295 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1296 if (key->enc_opts.dst_opt_type && 1297 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1298 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1299 return -EINVAL; 1300 } 1301 option_len = 0; 1302 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1303 option_len = fl_set_geneve_opt(nla_opt_key, key, 1304 key_depth, option_len, 1305 extack); 1306 if (option_len < 0) 1307 return option_len; 1308 1309 key->enc_opts.len += option_len; 1310 /* At the same time we need to parse through the mask 1311 * in order to verify exact and mask attribute lengths. 1312 */ 1313 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1314 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1315 msk_depth, option_len, 1316 extack); 1317 if (option_len < 0) 1318 return option_len; 1319 1320 mask->enc_opts.len += option_len; 1321 if (key->enc_opts.len != mask->enc_opts.len) { 1322 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1323 return -EINVAL; 1324 } 1325 break; 1326 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1327 if (key->enc_opts.dst_opt_type) { 1328 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1329 return -EINVAL; 1330 } 1331 option_len = 0; 1332 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1333 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1334 key_depth, option_len, 1335 extack); 1336 if (option_len < 0) 1337 return option_len; 1338 1339 key->enc_opts.len += option_len; 1340 /* At the same time we need to parse through the mask 1341 * in order to verify exact and mask attribute lengths. 1342 */ 1343 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1344 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1345 msk_depth, option_len, 1346 extack); 1347 if (option_len < 0) 1348 return option_len; 1349 1350 mask->enc_opts.len += option_len; 1351 if (key->enc_opts.len != mask->enc_opts.len) { 1352 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1353 return -EINVAL; 1354 } 1355 break; 1356 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1357 if (key->enc_opts.dst_opt_type) { 1358 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1359 return -EINVAL; 1360 } 1361 option_len = 0; 1362 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1363 option_len = fl_set_erspan_opt(nla_opt_key, key, 1364 key_depth, option_len, 1365 extack); 1366 if (option_len < 0) 1367 return option_len; 1368 1369 key->enc_opts.len += option_len; 1370 /* At the same time we need to parse through the mask 1371 * in order to verify exact and mask attribute lengths. 1372 */ 1373 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1374 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1375 msk_depth, option_len, 1376 extack); 1377 if (option_len < 0) 1378 return option_len; 1379 1380 mask->enc_opts.len += option_len; 1381 if (key->enc_opts.len != mask->enc_opts.len) { 1382 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1383 return -EINVAL; 1384 } 1385 break; 1386 default: 1387 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1388 return -EINVAL; 1389 } 1390 1391 if (!msk_depth) 1392 continue; 1393 1394 if (!nla_ok(nla_opt_msk, msk_depth)) { 1395 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1396 return -EINVAL; 1397 } 1398 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1399 } 1400 1401 return 0; 1402 } 1403 1404 static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1405 struct netlink_ext_ack *extack) 1406 { 1407 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1408 NL_SET_ERR_MSG_ATTR(extack, tb, 1409 "no trk, so no other flag can be set"); 1410 return -EINVAL; 1411 } 1412 1413 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1414 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1415 NL_SET_ERR_MSG_ATTR(extack, tb, 1416 "new and est are mutually exclusive"); 1417 return -EINVAL; 1418 } 1419 1420 return 0; 1421 } 1422 1423 static int fl_set_key_ct(struct nlattr **tb, 1424 struct flow_dissector_key_ct *key, 1425 struct flow_dissector_key_ct *mask, 1426 struct netlink_ext_ack *extack) 1427 { 1428 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1429 int err; 1430 1431 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1432 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1433 return -EOPNOTSUPP; 1434 } 1435 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1436 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1437 sizeof(key->ct_state)); 1438 1439 err = fl_validate_ct_state(mask->ct_state, 1440 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1441 extack); 1442 if (err) 1443 return err; 1444 1445 } 1446 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1447 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1448 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1449 return -EOPNOTSUPP; 1450 } 1451 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1452 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1453 sizeof(key->ct_zone)); 1454 } 1455 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1456 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1457 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1458 return -EOPNOTSUPP; 1459 } 1460 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1461 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1462 sizeof(key->ct_mark)); 1463 } 1464 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1465 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1466 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1467 return -EOPNOTSUPP; 1468 } 1469 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1470 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1471 sizeof(key->ct_labels)); 1472 } 1473 1474 return 0; 1475 } 1476 1477 static int fl_set_key(struct net *net, struct nlattr **tb, 1478 struct fl_flow_key *key, struct fl_flow_key *mask, 1479 struct netlink_ext_ack *extack) 1480 { 1481 __be16 ethertype; 1482 int ret = 0; 1483 1484 if (tb[TCA_FLOWER_INDEV]) { 1485 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1486 if (err < 0) 1487 return err; 1488 key->meta.ingress_ifindex = err; 1489 mask->meta.ingress_ifindex = 0xffffffff; 1490 } 1491 1492 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1493 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1494 sizeof(key->eth.dst)); 1495 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1496 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1497 sizeof(key->eth.src)); 1498 1499 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1500 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1501 1502 if (eth_type_vlan(ethertype)) { 1503 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1504 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 1505 &mask->vlan); 1506 1507 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1508 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1509 if (eth_type_vlan(ethertype)) { 1510 fl_set_key_vlan(tb, ethertype, 1511 TCA_FLOWER_KEY_CVLAN_ID, 1512 TCA_FLOWER_KEY_CVLAN_PRIO, 1513 &key->cvlan, &mask->cvlan); 1514 fl_set_key_val(tb, &key->basic.n_proto, 1515 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1516 &mask->basic.n_proto, 1517 TCA_FLOWER_UNSPEC, 1518 sizeof(key->basic.n_proto)); 1519 } else { 1520 key->basic.n_proto = ethertype; 1521 mask->basic.n_proto = cpu_to_be16(~0); 1522 } 1523 } 1524 } else { 1525 key->basic.n_proto = ethertype; 1526 mask->basic.n_proto = cpu_to_be16(~0); 1527 } 1528 } 1529 1530 if (key->basic.n_proto == htons(ETH_P_IP) || 1531 key->basic.n_proto == htons(ETH_P_IPV6)) { 1532 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1533 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1534 sizeof(key->basic.ip_proto)); 1535 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1536 } 1537 1538 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1539 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1540 mask->control.addr_type = ~0; 1541 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1542 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1543 sizeof(key->ipv4.src)); 1544 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1545 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1546 sizeof(key->ipv4.dst)); 1547 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1548 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1549 mask->control.addr_type = ~0; 1550 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1551 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1552 sizeof(key->ipv6.src)); 1553 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1554 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1555 sizeof(key->ipv6.dst)); 1556 } 1557 1558 if (key->basic.ip_proto == IPPROTO_TCP) { 1559 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1560 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1561 sizeof(key->tp.src)); 1562 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1563 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1564 sizeof(key->tp.dst)); 1565 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1566 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1567 sizeof(key->tcp.flags)); 1568 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1569 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1570 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1571 sizeof(key->tp.src)); 1572 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1573 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1574 sizeof(key->tp.dst)); 1575 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1576 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1577 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1578 sizeof(key->tp.src)); 1579 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1580 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1581 sizeof(key->tp.dst)); 1582 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1583 key->basic.ip_proto == IPPROTO_ICMP) { 1584 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1585 &mask->icmp.type, 1586 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1587 sizeof(key->icmp.type)); 1588 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1589 &mask->icmp.code, 1590 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1591 sizeof(key->icmp.code)); 1592 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1593 key->basic.ip_proto == IPPROTO_ICMPV6) { 1594 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1595 &mask->icmp.type, 1596 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1597 sizeof(key->icmp.type)); 1598 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1599 &mask->icmp.code, 1600 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1601 sizeof(key->icmp.code)); 1602 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1603 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1604 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1605 if (ret) 1606 return ret; 1607 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1608 key->basic.n_proto == htons(ETH_P_RARP)) { 1609 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1610 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1611 sizeof(key->arp.sip)); 1612 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1613 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1614 sizeof(key->arp.tip)); 1615 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1616 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1617 sizeof(key->arp.op)); 1618 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1619 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1620 sizeof(key->arp.sha)); 1621 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1622 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1623 sizeof(key->arp.tha)); 1624 } 1625 1626 if (key->basic.ip_proto == IPPROTO_TCP || 1627 key->basic.ip_proto == IPPROTO_UDP || 1628 key->basic.ip_proto == IPPROTO_SCTP) { 1629 ret = fl_set_key_port_range(tb, key, mask, extack); 1630 if (ret) 1631 return ret; 1632 } 1633 1634 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1635 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1636 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1637 mask->enc_control.addr_type = ~0; 1638 fl_set_key_val(tb, &key->enc_ipv4.src, 1639 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1640 &mask->enc_ipv4.src, 1641 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1642 sizeof(key->enc_ipv4.src)); 1643 fl_set_key_val(tb, &key->enc_ipv4.dst, 1644 TCA_FLOWER_KEY_ENC_IPV4_DST, 1645 &mask->enc_ipv4.dst, 1646 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1647 sizeof(key->enc_ipv4.dst)); 1648 } 1649 1650 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1651 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1652 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1653 mask->enc_control.addr_type = ~0; 1654 fl_set_key_val(tb, &key->enc_ipv6.src, 1655 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1656 &mask->enc_ipv6.src, 1657 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1658 sizeof(key->enc_ipv6.src)); 1659 fl_set_key_val(tb, &key->enc_ipv6.dst, 1660 TCA_FLOWER_KEY_ENC_IPV6_DST, 1661 &mask->enc_ipv6.dst, 1662 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1663 sizeof(key->enc_ipv6.dst)); 1664 } 1665 1666 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1667 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1668 sizeof(key->enc_key_id.keyid)); 1669 1670 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1671 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1672 sizeof(key->enc_tp.src)); 1673 1674 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1675 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1676 sizeof(key->enc_tp.dst)); 1677 1678 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1679 1680 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1681 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1682 sizeof(key->hash.hash)); 1683 1684 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1685 ret = fl_set_enc_opt(tb, key, mask, extack); 1686 if (ret) 1687 return ret; 1688 } 1689 1690 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1691 if (ret) 1692 return ret; 1693 1694 if (tb[TCA_FLOWER_KEY_FLAGS]) 1695 ret = fl_set_key_flags(tb, &key->control.flags, 1696 &mask->control.flags, extack); 1697 1698 return ret; 1699 } 1700 1701 static void fl_mask_copy(struct fl_flow_mask *dst, 1702 struct fl_flow_mask *src) 1703 { 1704 const void *psrc = fl_key_get_start(&src->key, src); 1705 void *pdst = fl_key_get_start(&dst->key, src); 1706 1707 memcpy(pdst, psrc, fl_mask_range(src)); 1708 dst->range = src->range; 1709 } 1710 1711 static const struct rhashtable_params fl_ht_params = { 1712 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1713 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1714 .automatic_shrinking = true, 1715 }; 1716 1717 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1718 { 1719 mask->filter_ht_params = fl_ht_params; 1720 mask->filter_ht_params.key_len = fl_mask_range(mask); 1721 mask->filter_ht_params.key_offset += mask->range.start; 1722 1723 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1724 } 1725 1726 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1727 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1728 1729 #define FL_KEY_IS_MASKED(mask, member) \ 1730 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1731 0, FL_KEY_MEMBER_SIZE(member)) \ 1732 1733 #define FL_KEY_SET(keys, cnt, id, member) \ 1734 do { \ 1735 keys[cnt].key_id = id; \ 1736 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1737 cnt++; \ 1738 } while(0); 1739 1740 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1741 do { \ 1742 if (FL_KEY_IS_MASKED(mask, member)) \ 1743 FL_KEY_SET(keys, cnt, id, member); \ 1744 } while(0); 1745 1746 static void fl_init_dissector(struct flow_dissector *dissector, 1747 struct fl_flow_key *mask) 1748 { 1749 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1750 size_t cnt = 0; 1751 1752 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1753 FLOW_DISSECTOR_KEY_META, meta); 1754 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1755 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1756 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1757 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1758 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1759 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1760 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1761 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1762 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1763 FLOW_DISSECTOR_KEY_PORTS, tp); 1764 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1765 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1766 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1767 FLOW_DISSECTOR_KEY_IP, ip); 1768 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1769 FLOW_DISSECTOR_KEY_TCP, tcp); 1770 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1771 FLOW_DISSECTOR_KEY_ICMP, icmp); 1772 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1773 FLOW_DISSECTOR_KEY_ARP, arp); 1774 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1775 FLOW_DISSECTOR_KEY_MPLS, mpls); 1776 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1777 FLOW_DISSECTOR_KEY_VLAN, vlan); 1778 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1779 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1780 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1781 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1782 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1783 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1784 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1785 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1786 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1787 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1788 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1789 enc_control); 1790 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1791 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1792 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1793 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1794 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1795 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1796 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1797 FLOW_DISSECTOR_KEY_CT, ct); 1798 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1799 FLOW_DISSECTOR_KEY_HASH, hash); 1800 1801 skb_flow_dissector_init(dissector, keys, cnt); 1802 } 1803 1804 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1805 struct fl_flow_mask *mask) 1806 { 1807 struct fl_flow_mask *newmask; 1808 int err; 1809 1810 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1811 if (!newmask) 1812 return ERR_PTR(-ENOMEM); 1813 1814 fl_mask_copy(newmask, mask); 1815 1816 if ((newmask->key.tp_range.tp_min.dst && 1817 newmask->key.tp_range.tp_max.dst) || 1818 (newmask->key.tp_range.tp_min.src && 1819 newmask->key.tp_range.tp_max.src)) 1820 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1821 1822 err = fl_init_mask_hashtable(newmask); 1823 if (err) 1824 goto errout_free; 1825 1826 fl_init_dissector(&newmask->dissector, &newmask->key); 1827 1828 INIT_LIST_HEAD_RCU(&newmask->filters); 1829 1830 refcount_set(&newmask->refcnt, 1); 1831 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1832 &newmask->ht_node, mask_ht_params); 1833 if (err) 1834 goto errout_destroy; 1835 1836 spin_lock(&head->masks_lock); 1837 list_add_tail_rcu(&newmask->list, &head->masks); 1838 spin_unlock(&head->masks_lock); 1839 1840 return newmask; 1841 1842 errout_destroy: 1843 rhashtable_destroy(&newmask->ht); 1844 errout_free: 1845 kfree(newmask); 1846 1847 return ERR_PTR(err); 1848 } 1849 1850 static int fl_check_assign_mask(struct cls_fl_head *head, 1851 struct cls_fl_filter *fnew, 1852 struct cls_fl_filter *fold, 1853 struct fl_flow_mask *mask) 1854 { 1855 struct fl_flow_mask *newmask; 1856 int ret = 0; 1857 1858 rcu_read_lock(); 1859 1860 /* Insert mask as temporary node to prevent concurrent creation of mask 1861 * with same key. Any concurrent lookups with same key will return 1862 * -EAGAIN because mask's refcnt is zero. 1863 */ 1864 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1865 &mask->ht_node, 1866 mask_ht_params); 1867 if (!fnew->mask) { 1868 rcu_read_unlock(); 1869 1870 if (fold) { 1871 ret = -EINVAL; 1872 goto errout_cleanup; 1873 } 1874 1875 newmask = fl_create_new_mask(head, mask); 1876 if (IS_ERR(newmask)) { 1877 ret = PTR_ERR(newmask); 1878 goto errout_cleanup; 1879 } 1880 1881 fnew->mask = newmask; 1882 return 0; 1883 } else if (IS_ERR(fnew->mask)) { 1884 ret = PTR_ERR(fnew->mask); 1885 } else if (fold && fold->mask != fnew->mask) { 1886 ret = -EINVAL; 1887 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1888 /* Mask was deleted concurrently, try again */ 1889 ret = -EAGAIN; 1890 } 1891 rcu_read_unlock(); 1892 return ret; 1893 1894 errout_cleanup: 1895 rhashtable_remove_fast(&head->ht, &mask->ht_node, 1896 mask_ht_params); 1897 return ret; 1898 } 1899 1900 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1901 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1902 unsigned long base, struct nlattr **tb, 1903 struct nlattr *est, bool ovr, 1904 struct fl_flow_tmplt *tmplt, bool rtnl_held, 1905 struct netlink_ext_ack *extack) 1906 { 1907 int err; 1908 1909 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held, 1910 extack); 1911 if (err < 0) 1912 return err; 1913 1914 if (tb[TCA_FLOWER_CLASSID]) { 1915 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1916 if (!rtnl_held) 1917 rtnl_lock(); 1918 tcf_bind_filter(tp, &f->res, base); 1919 if (!rtnl_held) 1920 rtnl_unlock(); 1921 } 1922 1923 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1924 if (err) 1925 return err; 1926 1927 fl_mask_update_range(mask); 1928 fl_set_masked_key(&f->mkey, &f->key, mask); 1929 1930 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1931 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1932 return -EINVAL; 1933 } 1934 1935 return 0; 1936 } 1937 1938 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 1939 struct cls_fl_filter *fold, 1940 bool *in_ht) 1941 { 1942 struct fl_flow_mask *mask = fnew->mask; 1943 int err; 1944 1945 err = rhashtable_lookup_insert_fast(&mask->ht, 1946 &fnew->ht_node, 1947 mask->filter_ht_params); 1948 if (err) { 1949 *in_ht = false; 1950 /* It is okay if filter with same key exists when 1951 * overwriting. 1952 */ 1953 return fold && err == -EEXIST ? 0 : err; 1954 } 1955 1956 *in_ht = true; 1957 return 0; 1958 } 1959 1960 static int fl_change(struct net *net, struct sk_buff *in_skb, 1961 struct tcf_proto *tp, unsigned long base, 1962 u32 handle, struct nlattr **tca, 1963 void **arg, bool ovr, bool rtnl_held, 1964 struct netlink_ext_ack *extack) 1965 { 1966 struct cls_fl_head *head = fl_head_dereference(tp); 1967 struct cls_fl_filter *fold = *arg; 1968 struct cls_fl_filter *fnew; 1969 struct fl_flow_mask *mask; 1970 struct nlattr **tb; 1971 bool in_ht; 1972 int err; 1973 1974 if (!tca[TCA_OPTIONS]) { 1975 err = -EINVAL; 1976 goto errout_fold; 1977 } 1978 1979 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1980 if (!mask) { 1981 err = -ENOBUFS; 1982 goto errout_fold; 1983 } 1984 1985 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1986 if (!tb) { 1987 err = -ENOBUFS; 1988 goto errout_mask_alloc; 1989 } 1990 1991 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1992 tca[TCA_OPTIONS], fl_policy, NULL); 1993 if (err < 0) 1994 goto errout_tb; 1995 1996 if (fold && handle && fold->handle != handle) { 1997 err = -EINVAL; 1998 goto errout_tb; 1999 } 2000 2001 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2002 if (!fnew) { 2003 err = -ENOBUFS; 2004 goto errout_tb; 2005 } 2006 INIT_LIST_HEAD(&fnew->hw_list); 2007 refcount_set(&fnew->refcnt, 1); 2008 2009 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 2010 if (err < 0) 2011 goto errout; 2012 2013 if (tb[TCA_FLOWER_FLAGS]) { 2014 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2015 2016 if (!tc_flags_valid(fnew->flags)) { 2017 err = -EINVAL; 2018 goto errout; 2019 } 2020 } 2021 2022 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 2023 tp->chain->tmplt_priv, rtnl_held, extack); 2024 if (err) 2025 goto errout; 2026 2027 err = fl_check_assign_mask(head, fnew, fold, mask); 2028 if (err) 2029 goto errout; 2030 2031 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2032 if (err) 2033 goto errout_mask; 2034 2035 if (!tc_skip_hw(fnew->flags)) { 2036 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2037 if (err) 2038 goto errout_ht; 2039 } 2040 2041 if (!tc_in_hw(fnew->flags)) 2042 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2043 2044 spin_lock(&tp->lock); 2045 2046 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2047 * proto again or create new one, if necessary. 2048 */ 2049 if (tp->deleting) { 2050 err = -EAGAIN; 2051 goto errout_hw; 2052 } 2053 2054 if (fold) { 2055 /* Fold filter was deleted concurrently. Retry lookup. */ 2056 if (fold->deleted) { 2057 err = -EAGAIN; 2058 goto errout_hw; 2059 } 2060 2061 fnew->handle = handle; 2062 2063 if (!in_ht) { 2064 struct rhashtable_params params = 2065 fnew->mask->filter_ht_params; 2066 2067 err = rhashtable_insert_fast(&fnew->mask->ht, 2068 &fnew->ht_node, 2069 params); 2070 if (err) 2071 goto errout_hw; 2072 in_ht = true; 2073 } 2074 2075 refcount_inc(&fnew->refcnt); 2076 rhashtable_remove_fast(&fold->mask->ht, 2077 &fold->ht_node, 2078 fold->mask->filter_ht_params); 2079 idr_replace(&head->handle_idr, fnew, fnew->handle); 2080 list_replace_rcu(&fold->list, &fnew->list); 2081 fold->deleted = true; 2082 2083 spin_unlock(&tp->lock); 2084 2085 fl_mask_put(head, fold->mask); 2086 if (!tc_skip_hw(fold->flags)) 2087 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2088 tcf_unbind_filter(tp, &fold->res); 2089 /* Caller holds reference to fold, so refcnt is always > 0 2090 * after this. 2091 */ 2092 refcount_dec(&fold->refcnt); 2093 __fl_put(fold); 2094 } else { 2095 if (handle) { 2096 /* user specifies a handle and it doesn't exist */ 2097 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2098 handle, GFP_ATOMIC); 2099 2100 /* Filter with specified handle was concurrently 2101 * inserted after initial check in cls_api. This is not 2102 * necessarily an error if NLM_F_EXCL is not set in 2103 * message flags. Returning EAGAIN will cause cls_api to 2104 * try to update concurrently inserted rule. 2105 */ 2106 if (err == -ENOSPC) 2107 err = -EAGAIN; 2108 } else { 2109 handle = 1; 2110 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2111 INT_MAX, GFP_ATOMIC); 2112 } 2113 if (err) 2114 goto errout_hw; 2115 2116 refcount_inc(&fnew->refcnt); 2117 fnew->handle = handle; 2118 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2119 spin_unlock(&tp->lock); 2120 } 2121 2122 *arg = fnew; 2123 2124 kfree(tb); 2125 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2126 return 0; 2127 2128 errout_ht: 2129 spin_lock(&tp->lock); 2130 errout_hw: 2131 fnew->deleted = true; 2132 spin_unlock(&tp->lock); 2133 if (!tc_skip_hw(fnew->flags)) 2134 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2135 if (in_ht) 2136 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2137 fnew->mask->filter_ht_params); 2138 errout_mask: 2139 fl_mask_put(head, fnew->mask); 2140 errout: 2141 __fl_put(fnew); 2142 errout_tb: 2143 kfree(tb); 2144 errout_mask_alloc: 2145 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2146 errout_fold: 2147 if (fold) 2148 __fl_put(fold); 2149 return err; 2150 } 2151 2152 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2153 bool rtnl_held, struct netlink_ext_ack *extack) 2154 { 2155 struct cls_fl_head *head = fl_head_dereference(tp); 2156 struct cls_fl_filter *f = arg; 2157 bool last_on_mask; 2158 int err = 0; 2159 2160 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2161 *last = list_empty(&head->masks); 2162 __fl_put(f); 2163 2164 return err; 2165 } 2166 2167 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2168 bool rtnl_held) 2169 { 2170 struct cls_fl_head *head = fl_head_dereference(tp); 2171 unsigned long id = arg->cookie, tmp; 2172 struct cls_fl_filter *f; 2173 2174 arg->count = arg->skip; 2175 2176 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2177 /* don't return filters that are being deleted */ 2178 if (!refcount_inc_not_zero(&f->refcnt)) 2179 continue; 2180 if (arg->fn(tp, f, arg) < 0) { 2181 __fl_put(f); 2182 arg->stop = 1; 2183 break; 2184 } 2185 __fl_put(f); 2186 arg->count++; 2187 } 2188 arg->cookie = id; 2189 } 2190 2191 static struct cls_fl_filter * 2192 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2193 { 2194 struct cls_fl_head *head = fl_head_dereference(tp); 2195 2196 spin_lock(&tp->lock); 2197 if (list_empty(&head->hw_filters)) { 2198 spin_unlock(&tp->lock); 2199 return NULL; 2200 } 2201 2202 if (!f) 2203 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2204 hw_list); 2205 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2206 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2207 spin_unlock(&tp->lock); 2208 return f; 2209 } 2210 } 2211 2212 spin_unlock(&tp->lock); 2213 return NULL; 2214 } 2215 2216 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2217 void *cb_priv, struct netlink_ext_ack *extack) 2218 { 2219 struct tcf_block *block = tp->chain->block; 2220 struct flow_cls_offload cls_flower = {}; 2221 struct cls_fl_filter *f = NULL; 2222 int err; 2223 2224 /* hw_filters list can only be changed by hw offload functions after 2225 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2226 * iterating it. 2227 */ 2228 ASSERT_RTNL(); 2229 2230 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2231 cls_flower.rule = 2232 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2233 if (!cls_flower.rule) { 2234 __fl_put(f); 2235 return -ENOMEM; 2236 } 2237 2238 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2239 extack); 2240 cls_flower.command = add ? 2241 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2242 cls_flower.cookie = (unsigned long)f; 2243 cls_flower.rule->match.dissector = &f->mask->dissector; 2244 cls_flower.rule->match.mask = &f->mask->key; 2245 cls_flower.rule->match.key = &f->mkey; 2246 2247 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 2248 if (err) { 2249 kfree(cls_flower.rule); 2250 if (tc_skip_sw(f->flags)) { 2251 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 2252 __fl_put(f); 2253 return err; 2254 } 2255 goto next_flow; 2256 } 2257 2258 cls_flower.classid = f->res.classid; 2259 2260 err = tc_setup_cb_reoffload(block, tp, add, cb, 2261 TC_SETUP_CLSFLOWER, &cls_flower, 2262 cb_priv, &f->flags, 2263 &f->in_hw_count); 2264 tc_cleanup_flow_action(&cls_flower.rule->action); 2265 kfree(cls_flower.rule); 2266 2267 if (err) { 2268 __fl_put(f); 2269 return err; 2270 } 2271 next_flow: 2272 __fl_put(f); 2273 } 2274 2275 return 0; 2276 } 2277 2278 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2279 { 2280 struct flow_cls_offload *cls_flower = type_data; 2281 struct cls_fl_filter *f = 2282 (struct cls_fl_filter *) cls_flower->cookie; 2283 struct cls_fl_head *head = fl_head_dereference(tp); 2284 2285 spin_lock(&tp->lock); 2286 list_add(&f->hw_list, &head->hw_filters); 2287 spin_unlock(&tp->lock); 2288 } 2289 2290 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2291 { 2292 struct flow_cls_offload *cls_flower = type_data; 2293 struct cls_fl_filter *f = 2294 (struct cls_fl_filter *) cls_flower->cookie; 2295 2296 spin_lock(&tp->lock); 2297 if (!list_empty(&f->hw_list)) 2298 list_del_init(&f->hw_list); 2299 spin_unlock(&tp->lock); 2300 } 2301 2302 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2303 struct fl_flow_tmplt *tmplt) 2304 { 2305 struct flow_cls_offload cls_flower = {}; 2306 struct tcf_block *block = chain->block; 2307 2308 cls_flower.rule = flow_rule_alloc(0); 2309 if (!cls_flower.rule) 2310 return -ENOMEM; 2311 2312 cls_flower.common.chain_index = chain->index; 2313 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2314 cls_flower.cookie = (unsigned long) tmplt; 2315 cls_flower.rule->match.dissector = &tmplt->dissector; 2316 cls_flower.rule->match.mask = &tmplt->mask; 2317 cls_flower.rule->match.key = &tmplt->dummy_key; 2318 2319 /* We don't care if driver (any of them) fails to handle this 2320 * call. It serves just as a hint for it. 2321 */ 2322 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2323 kfree(cls_flower.rule); 2324 2325 return 0; 2326 } 2327 2328 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2329 struct fl_flow_tmplt *tmplt) 2330 { 2331 struct flow_cls_offload cls_flower = {}; 2332 struct tcf_block *block = chain->block; 2333 2334 cls_flower.common.chain_index = chain->index; 2335 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2336 cls_flower.cookie = (unsigned long) tmplt; 2337 2338 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2339 } 2340 2341 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2342 struct nlattr **tca, 2343 struct netlink_ext_ack *extack) 2344 { 2345 struct fl_flow_tmplt *tmplt; 2346 struct nlattr **tb; 2347 int err; 2348 2349 if (!tca[TCA_OPTIONS]) 2350 return ERR_PTR(-EINVAL); 2351 2352 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2353 if (!tb) 2354 return ERR_PTR(-ENOBUFS); 2355 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2356 tca[TCA_OPTIONS], fl_policy, NULL); 2357 if (err) 2358 goto errout_tb; 2359 2360 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2361 if (!tmplt) { 2362 err = -ENOMEM; 2363 goto errout_tb; 2364 } 2365 tmplt->chain = chain; 2366 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2367 if (err) 2368 goto errout_tmplt; 2369 2370 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2371 2372 err = fl_hw_create_tmplt(chain, tmplt); 2373 if (err) 2374 goto errout_tmplt; 2375 2376 kfree(tb); 2377 return tmplt; 2378 2379 errout_tmplt: 2380 kfree(tmplt); 2381 errout_tb: 2382 kfree(tb); 2383 return ERR_PTR(err); 2384 } 2385 2386 static void fl_tmplt_destroy(void *tmplt_priv) 2387 { 2388 struct fl_flow_tmplt *tmplt = tmplt_priv; 2389 2390 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2391 kfree(tmplt); 2392 } 2393 2394 static int fl_dump_key_val(struct sk_buff *skb, 2395 void *val, int val_type, 2396 void *mask, int mask_type, int len) 2397 { 2398 int err; 2399 2400 if (!memchr_inv(mask, 0, len)) 2401 return 0; 2402 err = nla_put(skb, val_type, len, val); 2403 if (err) 2404 return err; 2405 if (mask_type != TCA_FLOWER_UNSPEC) { 2406 err = nla_put(skb, mask_type, len, mask); 2407 if (err) 2408 return err; 2409 } 2410 return 0; 2411 } 2412 2413 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2414 struct fl_flow_key *mask) 2415 { 2416 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2417 TCA_FLOWER_KEY_PORT_DST_MIN, 2418 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2419 sizeof(key->tp_range.tp_min.dst)) || 2420 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2421 TCA_FLOWER_KEY_PORT_DST_MAX, 2422 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2423 sizeof(key->tp_range.tp_max.dst)) || 2424 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2425 TCA_FLOWER_KEY_PORT_SRC_MIN, 2426 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2427 sizeof(key->tp_range.tp_min.src)) || 2428 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2429 TCA_FLOWER_KEY_PORT_SRC_MAX, 2430 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2431 sizeof(key->tp_range.tp_max.src))) 2432 return -1; 2433 2434 return 0; 2435 } 2436 2437 static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2438 struct flow_dissector_key_mpls *mpls_key, 2439 struct flow_dissector_key_mpls *mpls_mask, 2440 u8 lse_index) 2441 { 2442 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2443 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2444 int err; 2445 2446 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2447 lse_index + 1); 2448 if (err) 2449 return err; 2450 2451 if (lse_mask->mpls_ttl) { 2452 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2453 lse_key->mpls_ttl); 2454 if (err) 2455 return err; 2456 } 2457 if (lse_mask->mpls_bos) { 2458 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2459 lse_key->mpls_bos); 2460 if (err) 2461 return err; 2462 } 2463 if (lse_mask->mpls_tc) { 2464 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2465 lse_key->mpls_tc); 2466 if (err) 2467 return err; 2468 } 2469 if (lse_mask->mpls_label) { 2470 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2471 lse_key->mpls_label); 2472 if (err) 2473 return err; 2474 } 2475 2476 return 0; 2477 } 2478 2479 static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2480 struct flow_dissector_key_mpls *mpls_key, 2481 struct flow_dissector_key_mpls *mpls_mask) 2482 { 2483 struct nlattr *opts; 2484 struct nlattr *lse; 2485 u8 lse_index; 2486 int err; 2487 2488 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2489 if (!opts) 2490 return -EMSGSIZE; 2491 2492 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2493 if (!(mpls_mask->used_lses & 1 << lse_index)) 2494 continue; 2495 2496 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2497 if (!lse) { 2498 err = -EMSGSIZE; 2499 goto err_opts; 2500 } 2501 2502 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2503 lse_index); 2504 if (err) 2505 goto err_opts_lse; 2506 nla_nest_end(skb, lse); 2507 } 2508 nla_nest_end(skb, opts); 2509 2510 return 0; 2511 2512 err_opts_lse: 2513 nla_nest_cancel(skb, lse); 2514 err_opts: 2515 nla_nest_cancel(skb, opts); 2516 2517 return err; 2518 } 2519 2520 static int fl_dump_key_mpls(struct sk_buff *skb, 2521 struct flow_dissector_key_mpls *mpls_key, 2522 struct flow_dissector_key_mpls *mpls_mask) 2523 { 2524 struct flow_dissector_mpls_lse *lse_mask; 2525 struct flow_dissector_mpls_lse *lse_key; 2526 int err; 2527 2528 if (!mpls_mask->used_lses) 2529 return 0; 2530 2531 lse_mask = &mpls_mask->ls[0]; 2532 lse_key = &mpls_key->ls[0]; 2533 2534 /* For backward compatibility, don't use the MPLS nested attributes if 2535 * the rule can be expressed using the old attributes. 2536 */ 2537 if (mpls_mask->used_lses & ~1 || 2538 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2539 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2540 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2541 2542 if (lse_mask->mpls_ttl) { 2543 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2544 lse_key->mpls_ttl); 2545 if (err) 2546 return err; 2547 } 2548 if (lse_mask->mpls_tc) { 2549 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2550 lse_key->mpls_tc); 2551 if (err) 2552 return err; 2553 } 2554 if (lse_mask->mpls_label) { 2555 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2556 lse_key->mpls_label); 2557 if (err) 2558 return err; 2559 } 2560 if (lse_mask->mpls_bos) { 2561 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2562 lse_key->mpls_bos); 2563 if (err) 2564 return err; 2565 } 2566 return 0; 2567 } 2568 2569 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2570 struct flow_dissector_key_ip *key, 2571 struct flow_dissector_key_ip *mask) 2572 { 2573 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2574 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2575 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2576 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2577 2578 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2579 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2580 return -1; 2581 2582 return 0; 2583 } 2584 2585 static int fl_dump_key_vlan(struct sk_buff *skb, 2586 int vlan_id_key, int vlan_prio_key, 2587 struct flow_dissector_key_vlan *vlan_key, 2588 struct flow_dissector_key_vlan *vlan_mask) 2589 { 2590 int err; 2591 2592 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2593 return 0; 2594 if (vlan_mask->vlan_id) { 2595 err = nla_put_u16(skb, vlan_id_key, 2596 vlan_key->vlan_id); 2597 if (err) 2598 return err; 2599 } 2600 if (vlan_mask->vlan_priority) { 2601 err = nla_put_u8(skb, vlan_prio_key, 2602 vlan_key->vlan_priority); 2603 if (err) 2604 return err; 2605 } 2606 return 0; 2607 } 2608 2609 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2610 u32 *flower_key, u32 *flower_mask, 2611 u32 flower_flag_bit, u32 dissector_flag_bit) 2612 { 2613 if (dissector_mask & dissector_flag_bit) { 2614 *flower_mask |= flower_flag_bit; 2615 if (dissector_key & dissector_flag_bit) 2616 *flower_key |= flower_flag_bit; 2617 } 2618 } 2619 2620 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2621 { 2622 u32 key, mask; 2623 __be32 _key, _mask; 2624 int err; 2625 2626 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2627 return 0; 2628 2629 key = 0; 2630 mask = 0; 2631 2632 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2633 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2634 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2635 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2636 FLOW_DIS_FIRST_FRAG); 2637 2638 _key = cpu_to_be32(key); 2639 _mask = cpu_to_be32(mask); 2640 2641 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2642 if (err) 2643 return err; 2644 2645 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2646 } 2647 2648 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2649 struct flow_dissector_key_enc_opts *enc_opts) 2650 { 2651 struct geneve_opt *opt; 2652 struct nlattr *nest; 2653 int opt_off = 0; 2654 2655 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2656 if (!nest) 2657 goto nla_put_failure; 2658 2659 while (enc_opts->len > opt_off) { 2660 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2661 2662 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2663 opt->opt_class)) 2664 goto nla_put_failure; 2665 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2666 opt->type)) 2667 goto nla_put_failure; 2668 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2669 opt->length * 4, opt->opt_data)) 2670 goto nla_put_failure; 2671 2672 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2673 } 2674 nla_nest_end(skb, nest); 2675 return 0; 2676 2677 nla_put_failure: 2678 nla_nest_cancel(skb, nest); 2679 return -EMSGSIZE; 2680 } 2681 2682 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2683 struct flow_dissector_key_enc_opts *enc_opts) 2684 { 2685 struct vxlan_metadata *md; 2686 struct nlattr *nest; 2687 2688 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2689 if (!nest) 2690 goto nla_put_failure; 2691 2692 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2693 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2694 goto nla_put_failure; 2695 2696 nla_nest_end(skb, nest); 2697 return 0; 2698 2699 nla_put_failure: 2700 nla_nest_cancel(skb, nest); 2701 return -EMSGSIZE; 2702 } 2703 2704 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2705 struct flow_dissector_key_enc_opts *enc_opts) 2706 { 2707 struct erspan_metadata *md; 2708 struct nlattr *nest; 2709 2710 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2711 if (!nest) 2712 goto nla_put_failure; 2713 2714 md = (struct erspan_metadata *)&enc_opts->data[0]; 2715 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2716 goto nla_put_failure; 2717 2718 if (md->version == 1 && 2719 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2720 goto nla_put_failure; 2721 2722 if (md->version == 2 && 2723 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2724 md->u.md2.dir) || 2725 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2726 get_hwid(&md->u.md2)))) 2727 goto nla_put_failure; 2728 2729 nla_nest_end(skb, nest); 2730 return 0; 2731 2732 nla_put_failure: 2733 nla_nest_cancel(skb, nest); 2734 return -EMSGSIZE; 2735 } 2736 2737 static int fl_dump_key_ct(struct sk_buff *skb, 2738 struct flow_dissector_key_ct *key, 2739 struct flow_dissector_key_ct *mask) 2740 { 2741 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2742 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2743 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2744 sizeof(key->ct_state))) 2745 goto nla_put_failure; 2746 2747 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2748 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2749 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2750 sizeof(key->ct_zone))) 2751 goto nla_put_failure; 2752 2753 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2754 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2755 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2756 sizeof(key->ct_mark))) 2757 goto nla_put_failure; 2758 2759 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2760 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2761 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2762 sizeof(key->ct_labels))) 2763 goto nla_put_failure; 2764 2765 return 0; 2766 2767 nla_put_failure: 2768 return -EMSGSIZE; 2769 } 2770 2771 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2772 struct flow_dissector_key_enc_opts *enc_opts) 2773 { 2774 struct nlattr *nest; 2775 int err; 2776 2777 if (!enc_opts->len) 2778 return 0; 2779 2780 nest = nla_nest_start_noflag(skb, enc_opt_type); 2781 if (!nest) 2782 goto nla_put_failure; 2783 2784 switch (enc_opts->dst_opt_type) { 2785 case TUNNEL_GENEVE_OPT: 2786 err = fl_dump_key_geneve_opt(skb, enc_opts); 2787 if (err) 2788 goto nla_put_failure; 2789 break; 2790 case TUNNEL_VXLAN_OPT: 2791 err = fl_dump_key_vxlan_opt(skb, enc_opts); 2792 if (err) 2793 goto nla_put_failure; 2794 break; 2795 case TUNNEL_ERSPAN_OPT: 2796 err = fl_dump_key_erspan_opt(skb, enc_opts); 2797 if (err) 2798 goto nla_put_failure; 2799 break; 2800 default: 2801 goto nla_put_failure; 2802 } 2803 nla_nest_end(skb, nest); 2804 return 0; 2805 2806 nla_put_failure: 2807 nla_nest_cancel(skb, nest); 2808 return -EMSGSIZE; 2809 } 2810 2811 static int fl_dump_key_enc_opt(struct sk_buff *skb, 2812 struct flow_dissector_key_enc_opts *key_opts, 2813 struct flow_dissector_key_enc_opts *msk_opts) 2814 { 2815 int err; 2816 2817 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2818 if (err) 2819 return err; 2820 2821 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2822 } 2823 2824 static int fl_dump_key(struct sk_buff *skb, struct net *net, 2825 struct fl_flow_key *key, struct fl_flow_key *mask) 2826 { 2827 if (mask->meta.ingress_ifindex) { 2828 struct net_device *dev; 2829 2830 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 2831 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2832 goto nla_put_failure; 2833 } 2834 2835 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2836 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2837 sizeof(key->eth.dst)) || 2838 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2839 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2840 sizeof(key->eth.src)) || 2841 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2842 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2843 sizeof(key->basic.n_proto))) 2844 goto nla_put_failure; 2845 2846 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2847 goto nla_put_failure; 2848 2849 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 2850 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 2851 goto nla_put_failure; 2852 2853 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 2854 TCA_FLOWER_KEY_CVLAN_PRIO, 2855 &key->cvlan, &mask->cvlan) || 2856 (mask->cvlan.vlan_tpid && 2857 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2858 key->cvlan.vlan_tpid))) 2859 goto nla_put_failure; 2860 2861 if (mask->basic.n_proto) { 2862 if (mask->cvlan.vlan_tpid) { 2863 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 2864 key->basic.n_proto)) 2865 goto nla_put_failure; 2866 } else if (mask->vlan.vlan_tpid) { 2867 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2868 key->basic.n_proto)) 2869 goto nla_put_failure; 2870 } 2871 } 2872 2873 if ((key->basic.n_proto == htons(ETH_P_IP) || 2874 key->basic.n_proto == htons(ETH_P_IPV6)) && 2875 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 2876 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 2877 sizeof(key->basic.ip_proto)) || 2878 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 2879 goto nla_put_failure; 2880 2881 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2882 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 2883 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 2884 sizeof(key->ipv4.src)) || 2885 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 2886 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 2887 sizeof(key->ipv4.dst)))) 2888 goto nla_put_failure; 2889 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2890 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 2891 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 2892 sizeof(key->ipv6.src)) || 2893 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 2894 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 2895 sizeof(key->ipv6.dst)))) 2896 goto nla_put_failure; 2897 2898 if (key->basic.ip_proto == IPPROTO_TCP && 2899 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 2900 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 2901 sizeof(key->tp.src)) || 2902 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 2903 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 2904 sizeof(key->tp.dst)) || 2905 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 2906 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 2907 sizeof(key->tcp.flags)))) 2908 goto nla_put_failure; 2909 else if (key->basic.ip_proto == IPPROTO_UDP && 2910 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2911 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2912 sizeof(key->tp.src)) || 2913 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2914 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2915 sizeof(key->tp.dst)))) 2916 goto nla_put_failure; 2917 else if (key->basic.ip_proto == IPPROTO_SCTP && 2918 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2919 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2920 sizeof(key->tp.src)) || 2921 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2922 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2923 sizeof(key->tp.dst)))) 2924 goto nla_put_failure; 2925 else if (key->basic.n_proto == htons(ETH_P_IP) && 2926 key->basic.ip_proto == IPPROTO_ICMP && 2927 (fl_dump_key_val(skb, &key->icmp.type, 2928 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 2929 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2930 sizeof(key->icmp.type)) || 2931 fl_dump_key_val(skb, &key->icmp.code, 2932 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 2933 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2934 sizeof(key->icmp.code)))) 2935 goto nla_put_failure; 2936 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2937 key->basic.ip_proto == IPPROTO_ICMPV6 && 2938 (fl_dump_key_val(skb, &key->icmp.type, 2939 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 2940 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2941 sizeof(key->icmp.type)) || 2942 fl_dump_key_val(skb, &key->icmp.code, 2943 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 2944 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2945 sizeof(key->icmp.code)))) 2946 goto nla_put_failure; 2947 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 2948 key->basic.n_proto == htons(ETH_P_RARP)) && 2949 (fl_dump_key_val(skb, &key->arp.sip, 2950 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 2951 TCA_FLOWER_KEY_ARP_SIP_MASK, 2952 sizeof(key->arp.sip)) || 2953 fl_dump_key_val(skb, &key->arp.tip, 2954 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 2955 TCA_FLOWER_KEY_ARP_TIP_MASK, 2956 sizeof(key->arp.tip)) || 2957 fl_dump_key_val(skb, &key->arp.op, 2958 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 2959 TCA_FLOWER_KEY_ARP_OP_MASK, 2960 sizeof(key->arp.op)) || 2961 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2962 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2963 sizeof(key->arp.sha)) || 2964 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2965 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2966 sizeof(key->arp.tha)))) 2967 goto nla_put_failure; 2968 2969 if ((key->basic.ip_proto == IPPROTO_TCP || 2970 key->basic.ip_proto == IPPROTO_UDP || 2971 key->basic.ip_proto == IPPROTO_SCTP) && 2972 fl_dump_key_port_range(skb, key, mask)) 2973 goto nla_put_failure; 2974 2975 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2976 (fl_dump_key_val(skb, &key->enc_ipv4.src, 2977 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 2978 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2979 sizeof(key->enc_ipv4.src)) || 2980 fl_dump_key_val(skb, &key->enc_ipv4.dst, 2981 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 2982 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2983 sizeof(key->enc_ipv4.dst)))) 2984 goto nla_put_failure; 2985 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2986 (fl_dump_key_val(skb, &key->enc_ipv6.src, 2987 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 2988 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2989 sizeof(key->enc_ipv6.src)) || 2990 fl_dump_key_val(skb, &key->enc_ipv6.dst, 2991 TCA_FLOWER_KEY_ENC_IPV6_DST, 2992 &mask->enc_ipv6.dst, 2993 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2994 sizeof(key->enc_ipv6.dst)))) 2995 goto nla_put_failure; 2996 2997 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 2998 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 2999 sizeof(key->enc_key_id)) || 3000 fl_dump_key_val(skb, &key->enc_tp.src, 3001 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3002 &mask->enc_tp.src, 3003 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3004 sizeof(key->enc_tp.src)) || 3005 fl_dump_key_val(skb, &key->enc_tp.dst, 3006 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3007 &mask->enc_tp.dst, 3008 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3009 sizeof(key->enc_tp.dst)) || 3010 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3011 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3012 goto nla_put_failure; 3013 3014 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3015 goto nla_put_failure; 3016 3017 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3018 goto nla_put_failure; 3019 3020 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3021 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3022 sizeof(key->hash.hash))) 3023 goto nla_put_failure; 3024 3025 return 0; 3026 3027 nla_put_failure: 3028 return -EMSGSIZE; 3029 } 3030 3031 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3032 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3033 { 3034 struct cls_fl_filter *f = fh; 3035 struct nlattr *nest; 3036 struct fl_flow_key *key, *mask; 3037 bool skip_hw; 3038 3039 if (!f) 3040 return skb->len; 3041 3042 t->tcm_handle = f->handle; 3043 3044 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3045 if (!nest) 3046 goto nla_put_failure; 3047 3048 spin_lock(&tp->lock); 3049 3050 if (f->res.classid && 3051 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3052 goto nla_put_failure_locked; 3053 3054 key = &f->key; 3055 mask = &f->mask->key; 3056 skip_hw = tc_skip_hw(f->flags); 3057 3058 if (fl_dump_key(skb, net, key, mask)) 3059 goto nla_put_failure_locked; 3060 3061 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3062 goto nla_put_failure_locked; 3063 3064 spin_unlock(&tp->lock); 3065 3066 if (!skip_hw) 3067 fl_hw_update_stats(tp, f, rtnl_held); 3068 3069 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3070 goto nla_put_failure; 3071 3072 if (tcf_exts_dump(skb, &f->exts)) 3073 goto nla_put_failure; 3074 3075 nla_nest_end(skb, nest); 3076 3077 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3078 goto nla_put_failure; 3079 3080 return skb->len; 3081 3082 nla_put_failure_locked: 3083 spin_unlock(&tp->lock); 3084 nla_put_failure: 3085 nla_nest_cancel(skb, nest); 3086 return -1; 3087 } 3088 3089 static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3090 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3091 { 3092 struct cls_fl_filter *f = fh; 3093 struct nlattr *nest; 3094 bool skip_hw; 3095 3096 if (!f) 3097 return skb->len; 3098 3099 t->tcm_handle = f->handle; 3100 3101 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3102 if (!nest) 3103 goto nla_put_failure; 3104 3105 spin_lock(&tp->lock); 3106 3107 skip_hw = tc_skip_hw(f->flags); 3108 3109 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3110 goto nla_put_failure_locked; 3111 3112 spin_unlock(&tp->lock); 3113 3114 if (!skip_hw) 3115 fl_hw_update_stats(tp, f, rtnl_held); 3116 3117 if (tcf_exts_terse_dump(skb, &f->exts)) 3118 goto nla_put_failure; 3119 3120 nla_nest_end(skb, nest); 3121 3122 return skb->len; 3123 3124 nla_put_failure_locked: 3125 spin_unlock(&tp->lock); 3126 nla_put_failure: 3127 nla_nest_cancel(skb, nest); 3128 return -1; 3129 } 3130 3131 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3132 { 3133 struct fl_flow_tmplt *tmplt = tmplt_priv; 3134 struct fl_flow_key *key, *mask; 3135 struct nlattr *nest; 3136 3137 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3138 if (!nest) 3139 goto nla_put_failure; 3140 3141 key = &tmplt->dummy_key; 3142 mask = &tmplt->mask; 3143 3144 if (fl_dump_key(skb, net, key, mask)) 3145 goto nla_put_failure; 3146 3147 nla_nest_end(skb, nest); 3148 3149 return skb->len; 3150 3151 nla_put_failure: 3152 nla_nest_cancel(skb, nest); 3153 return -EMSGSIZE; 3154 } 3155 3156 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3157 unsigned long base) 3158 { 3159 struct cls_fl_filter *f = fh; 3160 3161 if (f && f->res.classid == classid) { 3162 if (cl) 3163 __tcf_bind_filter(q, &f->res, base); 3164 else 3165 __tcf_unbind_filter(q, &f->res); 3166 } 3167 } 3168 3169 static bool fl_delete_empty(struct tcf_proto *tp) 3170 { 3171 struct cls_fl_head *head = fl_head_dereference(tp); 3172 3173 spin_lock(&tp->lock); 3174 tp->deleting = idr_is_empty(&head->handle_idr); 3175 spin_unlock(&tp->lock); 3176 3177 return tp->deleting; 3178 } 3179 3180 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3181 .kind = "flower", 3182 .classify = fl_classify, 3183 .init = fl_init, 3184 .destroy = fl_destroy, 3185 .get = fl_get, 3186 .put = fl_put, 3187 .change = fl_change, 3188 .delete = fl_delete, 3189 .delete_empty = fl_delete_empty, 3190 .walk = fl_walk, 3191 .reoffload = fl_reoffload, 3192 .hw_add = fl_hw_add, 3193 .hw_del = fl_hw_del, 3194 .dump = fl_dump, 3195 .terse_dump = fl_terse_dump, 3196 .bind_class = fl_bind_class, 3197 .tmplt_create = fl_tmplt_create, 3198 .tmplt_destroy = fl_tmplt_destroy, 3199 .tmplt_dump = fl_tmplt_dump, 3200 .owner = THIS_MODULE, 3201 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3202 }; 3203 3204 static int __init cls_fl_init(void) 3205 { 3206 return register_tcf_proto_ops(&cls_fl_ops); 3207 } 3208 3209 static void __exit cls_fl_exit(void) 3210 { 3211 unregister_tcf_proto_ops(&cls_fl_ops); 3212 } 3213 3214 module_init(cls_fl_init); 3215 module_exit(cls_fl_exit); 3216 3217 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3218 MODULE_DESCRIPTION("Flower classifier"); 3219 MODULE_LICENSE("GPL v2"); 3220