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 38struct 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 75struct fl_flow_mask_range { 76 unsigned short int start; 77 unsigned short int end; 78}; 79 80struct 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 94struct 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 101struct 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 110struct 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 132static 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 139static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 140{ 141 return mask->range.end - mask->range.start; 142} 143 144static 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 167static 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 173static 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 185static 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 202static 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 208static 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 u16 min_mask, max_mask, min_val, max_val; 213 214 min_mask = ntohs(filter->mask->key.tp_range.tp_min.dst); 215 max_mask = ntohs(filter->mask->key.tp_range.tp_max.dst); 216 min_val = ntohs(filter->key.tp_range.tp_min.dst); 217 max_val = ntohs(filter->key.tp_range.tp_max.dst); 218 219 if (min_mask && max_mask) { 220 if (ntohs(key->tp_range.tp.dst) < min_val || 221 ntohs(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 231static 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 u16 min_mask, max_mask, min_val, max_val; 236 237 min_mask = ntohs(filter->mask->key.tp_range.tp_min.src); 238 max_mask = ntohs(filter->mask->key.tp_range.tp_max.src); 239 min_val = ntohs(filter->key.tp_range.tp_min.src); 240 max_val = ntohs(filter->key.tp_range.tp_max.src); 241 242 if (min_mask && max_mask) { 243 if (ntohs(key->tp_range.tp.src) < min_val || 244 ntohs(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 254static 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 261static 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 281static noinline_for_stack 282struct 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 293static 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 [IP_CT_RELATED_REPLY] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 301 TCA_FLOWER_KEY_CT_FLAGS_RELATED, 302 [IP_CT_NEW] = TCA_FLOWER_KEY_CT_FLAGS_TRACKED | 303 TCA_FLOWER_KEY_CT_FLAGS_NEW, 304}; 305 306static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 307 struct tcf_result *res) 308{ 309 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 310 struct fl_flow_key skb_key; 311 struct fl_flow_mask *mask; 312 struct cls_fl_filter *f; 313 314 list_for_each_entry_rcu(mask, &head->masks, list) { 315 flow_dissector_init_keys(&skb_key.control, &skb_key.basic); 316 fl_clear_masked_range(&skb_key, mask); 317 318 skb_flow_dissect_meta(skb, &mask->dissector, &skb_key); 319 /* skb_flow_dissect() does not set n_proto in case an unknown 320 * protocol, so do it rather here. 321 */ 322 skb_key.basic.n_proto = skb_protocol(skb, false); 323 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 324 skb_flow_dissect_ct(skb, &mask->dissector, &skb_key, 325 fl_ct_info_to_flower_map, 326 ARRAY_SIZE(fl_ct_info_to_flower_map)); 327 skb_flow_dissect_hash(skb, &mask->dissector, &skb_key); 328 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 329 330 f = fl_mask_lookup(mask, &skb_key); 331 if (f && !tc_skip_sw(f->flags)) { 332 *res = f->res; 333 return tcf_exts_exec(skb, &f->exts, res); 334 } 335 } 336 return -1; 337} 338 339static int fl_init(struct tcf_proto *tp) 340{ 341 struct cls_fl_head *head; 342 343 head = kzalloc(sizeof(*head), GFP_KERNEL); 344 if (!head) 345 return -ENOBUFS; 346 347 spin_lock_init(&head->masks_lock); 348 INIT_LIST_HEAD_RCU(&head->masks); 349 INIT_LIST_HEAD(&head->hw_filters); 350 rcu_assign_pointer(tp->root, head); 351 idr_init(&head->handle_idr); 352 353 return rhashtable_init(&head->ht, &mask_ht_params); 354} 355 356static void fl_mask_free(struct fl_flow_mask *mask, bool mask_init_done) 357{ 358 /* temporary masks don't have their filters list and ht initialized */ 359 if (mask_init_done) { 360 WARN_ON(!list_empty(&mask->filters)); 361 rhashtable_destroy(&mask->ht); 362 } 363 kfree(mask); 364} 365 366static void fl_mask_free_work(struct work_struct *work) 367{ 368 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 369 struct fl_flow_mask, rwork); 370 371 fl_mask_free(mask, true); 372} 373 374static void fl_uninit_mask_free_work(struct work_struct *work) 375{ 376 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 377 struct fl_flow_mask, rwork); 378 379 fl_mask_free(mask, false); 380} 381 382static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask) 383{ 384 if (!refcount_dec_and_test(&mask->refcnt)) 385 return false; 386 387 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 388 389 spin_lock(&head->masks_lock); 390 list_del_rcu(&mask->list); 391 spin_unlock(&head->masks_lock); 392 393 tcf_queue_work(&mask->rwork, fl_mask_free_work); 394 395 return true; 396} 397 398static struct cls_fl_head *fl_head_dereference(struct tcf_proto *tp) 399{ 400 /* Flower classifier only changes root pointer during init and destroy. 401 * Users must obtain reference to tcf_proto instance before calling its 402 * API, so tp->root pointer is protected from concurrent call to 403 * fl_destroy() by reference counting. 404 */ 405 return rcu_dereference_raw(tp->root); 406} 407 408static void __fl_destroy_filter(struct cls_fl_filter *f) 409{ 410 tcf_exts_destroy(&f->exts); 411 tcf_exts_put_net(&f->exts); 412 kfree(f); 413} 414 415static void fl_destroy_filter_work(struct work_struct *work) 416{ 417 struct cls_fl_filter *f = container_of(to_rcu_work(work), 418 struct cls_fl_filter, rwork); 419 420 __fl_destroy_filter(f); 421} 422 423static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 424 bool rtnl_held, struct netlink_ext_ack *extack) 425{ 426 struct tcf_block *block = tp->chain->block; 427 struct flow_cls_offload cls_flower = {}; 428 429 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 430 cls_flower.command = FLOW_CLS_DESTROY; 431 cls_flower.cookie = (unsigned long) f; 432 433 tc_setup_cb_destroy(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, false, 434 &f->flags, &f->in_hw_count, rtnl_held); 435 436} 437 438static int fl_hw_replace_filter(struct tcf_proto *tp, 439 struct cls_fl_filter *f, bool rtnl_held, 440 struct netlink_ext_ack *extack) 441{ 442 struct tcf_block *block = tp->chain->block; 443 struct flow_cls_offload cls_flower = {}; 444 bool skip_sw = tc_skip_sw(f->flags); 445 int err = 0; 446 447 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 448 if (!cls_flower.rule) 449 return -ENOMEM; 450 451 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 452 cls_flower.command = FLOW_CLS_REPLACE; 453 cls_flower.cookie = (unsigned long) f; 454 cls_flower.rule->match.dissector = &f->mask->dissector; 455 cls_flower.rule->match.mask = &f->mask->key; 456 cls_flower.rule->match.key = &f->mkey; 457 cls_flower.classid = f->res.classid; 458 459 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 460 if (err) { 461 kfree(cls_flower.rule); 462 if (skip_sw) { 463 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 464 return err; 465 } 466 return 0; 467 } 468 469 err = tc_setup_cb_add(block, tp, TC_SETUP_CLSFLOWER, &cls_flower, 470 skip_sw, &f->flags, &f->in_hw_count, rtnl_held); 471 tc_cleanup_flow_action(&cls_flower.rule->action); 472 kfree(cls_flower.rule); 473 474 if (err) { 475 fl_hw_destroy_filter(tp, f, rtnl_held, NULL); 476 return err; 477 } 478 479 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 480 return -EINVAL; 481 482 return 0; 483} 484 485static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f, 486 bool rtnl_held) 487{ 488 struct tcf_block *block = tp->chain->block; 489 struct flow_cls_offload cls_flower = {}; 490 491 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 492 cls_flower.command = FLOW_CLS_STATS; 493 cls_flower.cookie = (unsigned long) f; 494 cls_flower.classid = f->res.classid; 495 496 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, 497 rtnl_held); 498 499 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes, 500 cls_flower.stats.pkts, 501 cls_flower.stats.drops, 502 cls_flower.stats.lastused, 503 cls_flower.stats.used_hw_stats, 504 cls_flower.stats.used_hw_stats_valid); 505} 506 507static void __fl_put(struct cls_fl_filter *f) 508{ 509 if (!refcount_dec_and_test(&f->refcnt)) 510 return; 511 512 if (tcf_exts_get_net(&f->exts)) 513 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 514 else 515 __fl_destroy_filter(f); 516} 517 518static struct cls_fl_filter *__fl_get(struct cls_fl_head *head, u32 handle) 519{ 520 struct cls_fl_filter *f; 521 522 rcu_read_lock(); 523 f = idr_find(&head->handle_idr, handle); 524 if (f && !refcount_inc_not_zero(&f->refcnt)) 525 f = NULL; 526 rcu_read_unlock(); 527 528 return f; 529} 530 531static int __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 532 bool *last, bool rtnl_held, 533 struct netlink_ext_ack *extack) 534{ 535 struct cls_fl_head *head = fl_head_dereference(tp); 536 537 *last = false; 538 539 spin_lock(&tp->lock); 540 if (f->deleted) { 541 spin_unlock(&tp->lock); 542 return -ENOENT; 543 } 544 545 f->deleted = true; 546 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 547 f->mask->filter_ht_params); 548 idr_remove(&head->handle_idr, f->handle); 549 list_del_rcu(&f->list); 550 spin_unlock(&tp->lock); 551 552 *last = fl_mask_put(head, f->mask); 553 if (!tc_skip_hw(f->flags)) 554 fl_hw_destroy_filter(tp, f, rtnl_held, extack); 555 tcf_unbind_filter(tp, &f->res); 556 __fl_put(f); 557 558 return 0; 559} 560 561static void fl_destroy_sleepable(struct work_struct *work) 562{ 563 struct cls_fl_head *head = container_of(to_rcu_work(work), 564 struct cls_fl_head, 565 rwork); 566 567 rhashtable_destroy(&head->ht); 568 kfree(head); 569 module_put(THIS_MODULE); 570} 571 572static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 573 struct netlink_ext_ack *extack) 574{ 575 struct cls_fl_head *head = fl_head_dereference(tp); 576 struct fl_flow_mask *mask, *next_mask; 577 struct cls_fl_filter *f, *next; 578 bool last; 579 580 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 581 list_for_each_entry_safe(f, next, &mask->filters, list) { 582 __fl_delete(tp, f, &last, rtnl_held, extack); 583 if (last) 584 break; 585 } 586 } 587 idr_destroy(&head->handle_idr); 588 589 __module_get(THIS_MODULE); 590 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 591} 592 593static void fl_put(struct tcf_proto *tp, void *arg) 594{ 595 struct cls_fl_filter *f = arg; 596 597 __fl_put(f); 598} 599 600static void *fl_get(struct tcf_proto *tp, u32 handle) 601{ 602 struct cls_fl_head *head = fl_head_dereference(tp); 603 604 return __fl_get(head, handle); 605} 606 607static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 608 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 609 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 610 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 611 .len = IFNAMSIZ }, 612 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 613 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 614 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 615 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 616 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 617 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 618 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 619 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 620 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 621 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 622 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 623 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 624 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 625 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 626 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 627 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 628 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 629 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 630 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 631 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 632 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 633 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 634 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 635 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 636 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 637 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 638 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 639 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 640 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 641 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 642 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 643 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 644 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 645 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 646 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 647 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 648 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 649 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 650 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 651 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 652 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 653 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 654 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 655 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 656 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 657 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 658 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 659 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 660 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 661 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 662 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 663 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 664 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 665 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 666 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 667 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 668 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 669 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 670 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 671 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 672 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 673 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 674 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 675 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 676 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 677 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 678 [TCA_FLOWER_KEY_MPLS_OPTS] = { .type = NLA_NESTED }, 679 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 680 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 681 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 682 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 683 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 684 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 685 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 686 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 687 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 688 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 689 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 690 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 691 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 692 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 693 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 694 [TCA_FLOWER_KEY_CT_STATE] = 695 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 696 [TCA_FLOWER_KEY_CT_STATE_MASK] = 697 NLA_POLICY_MASK(NLA_U16, TCA_FLOWER_KEY_CT_FLAGS_MASK), 698 [TCA_FLOWER_KEY_CT_ZONE] = { .type = NLA_U16 }, 699 [TCA_FLOWER_KEY_CT_ZONE_MASK] = { .type = NLA_U16 }, 700 [TCA_FLOWER_KEY_CT_MARK] = { .type = NLA_U32 }, 701 [TCA_FLOWER_KEY_CT_MARK_MASK] = { .type = NLA_U32 }, 702 [TCA_FLOWER_KEY_CT_LABELS] = { .type = NLA_BINARY, 703 .len = 128 / BITS_PER_BYTE }, 704 [TCA_FLOWER_KEY_CT_LABELS_MASK] = { .type = NLA_BINARY, 705 .len = 128 / BITS_PER_BYTE }, 706 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 707 [TCA_FLOWER_KEY_HASH] = { .type = NLA_U32 }, 708 [TCA_FLOWER_KEY_HASH_MASK] = { .type = NLA_U32 }, 709 710}; 711 712static const struct nla_policy 713enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 714 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 715 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 716 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 717 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 718 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 719}; 720 721static const struct nla_policy 722geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 723 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 724 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 725 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 726 .len = 128 }, 727}; 728 729static const struct nla_policy 730vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 731 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 732}; 733 734static const struct nla_policy 735erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 736 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 737 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 738 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 739 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 740}; 741 742static const struct nla_policy 743mpls_stack_entry_policy[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1] = { 744 [TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH] = { .type = NLA_U8 }, 745 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL] = { .type = NLA_U8 }, 746 [TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS] = { .type = NLA_U8 }, 747 [TCA_FLOWER_KEY_MPLS_OPT_LSE_TC] = { .type = NLA_U8 }, 748 [TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL] = { .type = NLA_U32 }, 749}; 750 751static void fl_set_key_val(struct nlattr **tb, 752 void *val, int val_type, 753 void *mask, int mask_type, int len) 754{ 755 if (!tb[val_type]) 756 return; 757 nla_memcpy(val, tb[val_type], len); 758 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 759 memset(mask, 0xff, len); 760 else 761 nla_memcpy(mask, tb[mask_type], len); 762} 763 764static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 765 struct fl_flow_key *mask, 766 struct netlink_ext_ack *extack) 767{ 768 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 769 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 770 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 771 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 772 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 773 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 774 fl_set_key_val(tb, &key->tp_range.tp_min.src, 775 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 776 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 777 fl_set_key_val(tb, &key->tp_range.tp_max.src, 778 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 779 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 780 781 if (mask->tp_range.tp_min.dst != mask->tp_range.tp_max.dst) { 782 NL_SET_ERR_MSG(extack, 783 "Both min and max destination ports must be specified"); 784 return -EINVAL; 785 } 786 if (mask->tp_range.tp_min.src != mask->tp_range.tp_max.src) { 787 NL_SET_ERR_MSG(extack, 788 "Both min and max source ports must be specified"); 789 return -EINVAL; 790 } 791 if (mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 792 ntohs(key->tp_range.tp_max.dst) <= 793 ntohs(key->tp_range.tp_min.dst)) { 794 NL_SET_ERR_MSG_ATTR(extack, 795 tb[TCA_FLOWER_KEY_PORT_DST_MIN], 796 "Invalid destination port range (min must be strictly smaller than max)"); 797 return -EINVAL; 798 } 799 if (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 800 ntohs(key->tp_range.tp_max.src) <= 801 ntohs(key->tp_range.tp_min.src)) { 802 NL_SET_ERR_MSG_ATTR(extack, 803 tb[TCA_FLOWER_KEY_PORT_SRC_MIN], 804 "Invalid source port range (min must be strictly smaller than max)"); 805 return -EINVAL; 806 } 807 808 return 0; 809} 810 811static int fl_set_key_mpls_lse(const struct nlattr *nla_lse, 812 struct flow_dissector_key_mpls *key_val, 813 struct flow_dissector_key_mpls *key_mask, 814 struct netlink_ext_ack *extack) 815{ 816 struct nlattr *tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX + 1]; 817 struct flow_dissector_mpls_lse *lse_mask; 818 struct flow_dissector_mpls_lse *lse_val; 819 u8 lse_index; 820 u8 depth; 821 int err; 822 823 err = nla_parse_nested(tb, TCA_FLOWER_KEY_MPLS_OPT_LSE_MAX, nla_lse, 824 mpls_stack_entry_policy, extack); 825 if (err < 0) 826 return err; 827 828 if (!tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]) { 829 NL_SET_ERR_MSG(extack, "Missing MPLS option \"depth\""); 830 return -EINVAL; 831 } 832 833 depth = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH]); 834 835 /* LSE depth starts at 1, for consistency with terminology used by 836 * RFC 3031 (section 3.9), where depth 0 refers to unlabeled packets. 837 */ 838 if (depth < 1 || depth > FLOW_DIS_MPLS_MAX) { 839 NL_SET_ERR_MSG_ATTR(extack, 840 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH], 841 "Invalid MPLS depth"); 842 return -EINVAL; 843 } 844 lse_index = depth - 1; 845 846 dissector_set_mpls_lse(key_val, lse_index); 847 dissector_set_mpls_lse(key_mask, lse_index); 848 849 lse_val = &key_val->ls[lse_index]; 850 lse_mask = &key_mask->ls[lse_index]; 851 852 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]) { 853 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL]); 854 lse_mask->mpls_ttl = MPLS_TTL_MASK; 855 } 856 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]) { 857 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS]); 858 859 if (bos & ~MPLS_BOS_MASK) { 860 NL_SET_ERR_MSG_ATTR(extack, 861 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS], 862 "Bottom Of Stack (BOS) must be 0 or 1"); 863 return -EINVAL; 864 } 865 lse_val->mpls_bos = bos; 866 lse_mask->mpls_bos = MPLS_BOS_MASK; 867 } 868 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]) { 869 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC]); 870 871 if (tc & ~MPLS_TC_MASK) { 872 NL_SET_ERR_MSG_ATTR(extack, 873 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_TC], 874 "Traffic Class (TC) must be between 0 and 7"); 875 return -EINVAL; 876 } 877 lse_val->mpls_tc = tc; 878 lse_mask->mpls_tc = MPLS_TC_MASK; 879 } 880 if (tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]) { 881 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL]); 882 883 if (label & ~MPLS_LABEL_MASK) { 884 NL_SET_ERR_MSG_ATTR(extack, 885 tb[TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL], 886 "Label must be between 0 and 1048575"); 887 return -EINVAL; 888 } 889 lse_val->mpls_label = label; 890 lse_mask->mpls_label = MPLS_LABEL_MASK; 891 } 892 893 return 0; 894} 895 896static int fl_set_key_mpls_opts(const struct nlattr *nla_mpls_opts, 897 struct flow_dissector_key_mpls *key_val, 898 struct flow_dissector_key_mpls *key_mask, 899 struct netlink_ext_ack *extack) 900{ 901 struct nlattr *nla_lse; 902 int rem; 903 int err; 904 905 if (!(nla_mpls_opts->nla_type & NLA_F_NESTED)) { 906 NL_SET_ERR_MSG_ATTR(extack, nla_mpls_opts, 907 "NLA_F_NESTED is missing"); 908 return -EINVAL; 909 } 910 911 nla_for_each_nested(nla_lse, nla_mpls_opts, rem) { 912 if (nla_type(nla_lse) != TCA_FLOWER_KEY_MPLS_OPTS_LSE) { 913 NL_SET_ERR_MSG_ATTR(extack, nla_lse, 914 "Invalid MPLS option type"); 915 return -EINVAL; 916 } 917 918 err = fl_set_key_mpls_lse(nla_lse, key_val, key_mask, extack); 919 if (err < 0) 920 return err; 921 } 922 if (rem) { 923 NL_SET_ERR_MSG(extack, 924 "Bytes leftover after parsing MPLS options"); 925 return -EINVAL; 926 } 927 928 return 0; 929} 930 931static int fl_set_key_mpls(struct nlattr **tb, 932 struct flow_dissector_key_mpls *key_val, 933 struct flow_dissector_key_mpls *key_mask, 934 struct netlink_ext_ack *extack) 935{ 936 struct flow_dissector_mpls_lse *lse_mask; 937 struct flow_dissector_mpls_lse *lse_val; 938 939 if (tb[TCA_FLOWER_KEY_MPLS_OPTS]) { 940 if (tb[TCA_FLOWER_KEY_MPLS_TTL] || 941 tb[TCA_FLOWER_KEY_MPLS_BOS] || 942 tb[TCA_FLOWER_KEY_MPLS_TC] || 943 tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 944 NL_SET_ERR_MSG_ATTR(extack, 945 tb[TCA_FLOWER_KEY_MPLS_OPTS], 946 "MPLS label, Traffic Class, Bottom Of Stack and Time To Live must be encapsulated in the MPLS options attribute"); 947 return -EBADMSG; 948 } 949 950 return fl_set_key_mpls_opts(tb[TCA_FLOWER_KEY_MPLS_OPTS], 951 key_val, key_mask, extack); 952 } 953 954 lse_val = &key_val->ls[0]; 955 lse_mask = &key_mask->ls[0]; 956 957 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 958 lse_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 959 lse_mask->mpls_ttl = MPLS_TTL_MASK; 960 dissector_set_mpls_lse(key_val, 0); 961 dissector_set_mpls_lse(key_mask, 0); 962 } 963 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 964 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 965 966 if (bos & ~MPLS_BOS_MASK) { 967 NL_SET_ERR_MSG_ATTR(extack, 968 tb[TCA_FLOWER_KEY_MPLS_BOS], 969 "Bottom Of Stack (BOS) must be 0 or 1"); 970 return -EINVAL; 971 } 972 lse_val->mpls_bos = bos; 973 lse_mask->mpls_bos = MPLS_BOS_MASK; 974 dissector_set_mpls_lse(key_val, 0); 975 dissector_set_mpls_lse(key_mask, 0); 976 } 977 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 978 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 979 980 if (tc & ~MPLS_TC_MASK) { 981 NL_SET_ERR_MSG_ATTR(extack, 982 tb[TCA_FLOWER_KEY_MPLS_TC], 983 "Traffic Class (TC) must be between 0 and 7"); 984 return -EINVAL; 985 } 986 lse_val->mpls_tc = tc; 987 lse_mask->mpls_tc = MPLS_TC_MASK; 988 dissector_set_mpls_lse(key_val, 0); 989 dissector_set_mpls_lse(key_mask, 0); 990 } 991 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 992 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 993 994 if (label & ~MPLS_LABEL_MASK) { 995 NL_SET_ERR_MSG_ATTR(extack, 996 tb[TCA_FLOWER_KEY_MPLS_LABEL], 997 "Label must be between 0 and 1048575"); 998 return -EINVAL; 999 } 1000 lse_val->mpls_label = label; 1001 lse_mask->mpls_label = MPLS_LABEL_MASK; 1002 dissector_set_mpls_lse(key_val, 0); 1003 dissector_set_mpls_lse(key_mask, 0); 1004 } 1005 return 0; 1006} 1007 1008static void fl_set_key_vlan(struct nlattr **tb, 1009 __be16 ethertype, 1010 int vlan_id_key, int vlan_prio_key, 1011 int vlan_next_eth_type_key, 1012 struct flow_dissector_key_vlan *key_val, 1013 struct flow_dissector_key_vlan *key_mask) 1014{ 1015#define VLAN_PRIORITY_MASK 0x7 1016 1017 if (tb[vlan_id_key]) { 1018 key_val->vlan_id = 1019 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 1020 key_mask->vlan_id = VLAN_VID_MASK; 1021 } 1022 if (tb[vlan_prio_key]) { 1023 key_val->vlan_priority = 1024 nla_get_u8(tb[vlan_prio_key]) & 1025 VLAN_PRIORITY_MASK; 1026 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 1027 } 1028 key_val->vlan_tpid = ethertype; 1029 key_mask->vlan_tpid = cpu_to_be16(~0); 1030 if (tb[vlan_next_eth_type_key]) { 1031 key_val->vlan_eth_type = 1032 nla_get_be16(tb[vlan_next_eth_type_key]); 1033 key_mask->vlan_eth_type = cpu_to_be16(~0); 1034 } 1035} 1036 1037static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 1038 u32 *dissector_key, u32 *dissector_mask, 1039 u32 flower_flag_bit, u32 dissector_flag_bit) 1040{ 1041 if (flower_mask & flower_flag_bit) { 1042 *dissector_mask |= dissector_flag_bit; 1043 if (flower_key & flower_flag_bit) 1044 *dissector_key |= dissector_flag_bit; 1045 } 1046} 1047 1048static int fl_set_key_flags(struct nlattr **tb, u32 *flags_key, 1049 u32 *flags_mask, struct netlink_ext_ack *extack) 1050{ 1051 u32 key, mask; 1052 1053 /* mask is mandatory for flags */ 1054 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) { 1055 NL_SET_ERR_MSG(extack, "Missing flags mask"); 1056 return -EINVAL; 1057 } 1058 1059 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 1060 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 1061 1062 *flags_key = 0; 1063 *flags_mask = 0; 1064 1065 fl_set_key_flag(key, mask, flags_key, flags_mask, 1066 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1067 fl_set_key_flag(key, mask, flags_key, flags_mask, 1068 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1069 FLOW_DIS_FIRST_FRAG); 1070 1071 return 0; 1072} 1073 1074static void fl_set_key_ip(struct nlattr **tb, bool encap, 1075 struct flow_dissector_key_ip *key, 1076 struct flow_dissector_key_ip *mask) 1077{ 1078 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1079 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1080 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1081 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1082 1083 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 1084 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 1085} 1086 1087static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 1088 int depth, int option_len, 1089 struct netlink_ext_ack *extack) 1090{ 1091 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 1092 struct nlattr *class = NULL, *type = NULL, *data = NULL; 1093 struct geneve_opt *opt; 1094 int err, data_len = 0; 1095 1096 if (option_len > sizeof(struct geneve_opt)) 1097 data_len = option_len - sizeof(struct geneve_opt); 1098 1099 if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) 1100 return -ERANGE; 1101 1102 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 1103 memset(opt, 0xff, option_len); 1104 opt->length = data_len / 4; 1105 opt->r1 = 0; 1106 opt->r2 = 0; 1107 opt->r3 = 0; 1108 1109 /* If no mask has been prodived we assume an exact match. */ 1110 if (!depth) 1111 return sizeof(struct geneve_opt) + data_len; 1112 1113 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 1114 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 1115 return -EINVAL; 1116 } 1117 1118 err = nla_parse_nested_deprecated(tb, 1119 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 1120 nla, geneve_opt_policy, extack); 1121 if (err < 0) 1122 return err; 1123 1124 /* We are not allowed to omit any of CLASS, TYPE or DATA 1125 * fields from the key. 1126 */ 1127 if (!option_len && 1128 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 1129 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 1130 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 1131 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 1132 return -EINVAL; 1133 } 1134 1135 /* Omitting any of CLASS, TYPE or DATA fields is allowed 1136 * for the mask. 1137 */ 1138 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 1139 int new_len = key->enc_opts.len; 1140 1141 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 1142 data_len = nla_len(data); 1143 if (data_len < 4) { 1144 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 1145 return -ERANGE; 1146 } 1147 if (data_len % 4) { 1148 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 1149 return -ERANGE; 1150 } 1151 1152 new_len += sizeof(struct geneve_opt) + data_len; 1153 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 1154 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 1155 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 1156 return -ERANGE; 1157 } 1158 opt->length = data_len / 4; 1159 memcpy(opt->opt_data, nla_data(data), data_len); 1160 } 1161 1162 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 1163 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 1164 opt->opt_class = nla_get_be16(class); 1165 } 1166 1167 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 1168 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 1169 opt->type = nla_get_u8(type); 1170 } 1171 1172 return sizeof(struct geneve_opt) + data_len; 1173} 1174 1175static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1176 int depth, int option_len, 1177 struct netlink_ext_ack *extack) 1178{ 1179 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 1180 struct vxlan_metadata *md; 1181 int err; 1182 1183 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1184 memset(md, 0xff, sizeof(*md)); 1185 1186 if (!depth) 1187 return sizeof(*md); 1188 1189 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 1190 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 1191 return -EINVAL; 1192 } 1193 1194 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 1195 vxlan_opt_policy, extack); 1196 if (err < 0) 1197 return err; 1198 1199 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1200 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 1201 return -EINVAL; 1202 } 1203 1204 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 1205 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 1206 md->gbp &= VXLAN_GBP_MASK; 1207 } 1208 1209 return sizeof(*md); 1210} 1211 1212static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 1213 int depth, int option_len, 1214 struct netlink_ext_ack *extack) 1215{ 1216 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 1217 struct erspan_metadata *md; 1218 int err; 1219 1220 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1221 memset(md, 0xff, sizeof(*md)); 1222 md->version = 1; 1223 1224 if (!depth) 1225 return sizeof(*md); 1226 1227 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1228 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1229 return -EINVAL; 1230 } 1231 1232 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1233 erspan_opt_policy, extack); 1234 if (err < 0) 1235 return err; 1236 1237 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1238 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1239 return -EINVAL; 1240 } 1241 1242 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1243 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1244 1245 if (md->version == 1) { 1246 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1247 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1248 return -EINVAL; 1249 } 1250 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1251 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1252 memset(&md->u, 0x00, sizeof(md->u)); 1253 md->u.index = nla_get_be32(nla); 1254 } 1255 } else if (md->version == 2) { 1256 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1257 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1258 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1259 return -EINVAL; 1260 } 1261 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1262 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1263 md->u.md2.dir = nla_get_u8(nla); 1264 } 1265 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1266 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1267 set_hwid(&md->u.md2, nla_get_u8(nla)); 1268 } 1269 } else { 1270 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1271 return -EINVAL; 1272 } 1273 1274 return sizeof(*md); 1275} 1276 1277static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1278 struct fl_flow_key *mask, 1279 struct netlink_ext_ack *extack) 1280{ 1281 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1282 int err, option_len, key_depth, msk_depth = 0; 1283 1284 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1285 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1286 enc_opts_policy, extack); 1287 if (err) 1288 return err; 1289 1290 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1291 1292 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1293 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1294 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1295 enc_opts_policy, extack); 1296 if (err) 1297 return err; 1298 1299 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1300 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1301 if (!nla_ok(nla_opt_msk, msk_depth)) { 1302 NL_SET_ERR_MSG(extack, "Invalid nested attribute for masks"); 1303 return -EINVAL; 1304 } 1305 } 1306 1307 nla_for_each_attr(nla_opt_key, nla_enc_key, 1308 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1309 switch (nla_type(nla_opt_key)) { 1310 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1311 if (key->enc_opts.dst_opt_type && 1312 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1313 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1314 return -EINVAL; 1315 } 1316 option_len = 0; 1317 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1318 option_len = fl_set_geneve_opt(nla_opt_key, key, 1319 key_depth, option_len, 1320 extack); 1321 if (option_len < 0) 1322 return option_len; 1323 1324 key->enc_opts.len += option_len; 1325 /* At the same time we need to parse through the mask 1326 * in order to verify exact and mask attribute lengths. 1327 */ 1328 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1329 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1330 msk_depth, option_len, 1331 extack); 1332 if (option_len < 0) 1333 return option_len; 1334 1335 mask->enc_opts.len += option_len; 1336 if (key->enc_opts.len != mask->enc_opts.len) { 1337 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1338 return -EINVAL; 1339 } 1340 break; 1341 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1342 if (key->enc_opts.dst_opt_type) { 1343 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1344 return -EINVAL; 1345 } 1346 option_len = 0; 1347 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1348 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1349 key_depth, option_len, 1350 extack); 1351 if (option_len < 0) 1352 return option_len; 1353 1354 key->enc_opts.len += option_len; 1355 /* At the same time we need to parse through the mask 1356 * in order to verify exact and mask attribute lengths. 1357 */ 1358 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1359 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1360 msk_depth, option_len, 1361 extack); 1362 if (option_len < 0) 1363 return option_len; 1364 1365 mask->enc_opts.len += option_len; 1366 if (key->enc_opts.len != mask->enc_opts.len) { 1367 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1368 return -EINVAL; 1369 } 1370 break; 1371 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1372 if (key->enc_opts.dst_opt_type) { 1373 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1374 return -EINVAL; 1375 } 1376 option_len = 0; 1377 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1378 option_len = fl_set_erspan_opt(nla_opt_key, key, 1379 key_depth, option_len, 1380 extack); 1381 if (option_len < 0) 1382 return option_len; 1383 1384 key->enc_opts.len += option_len; 1385 /* At the same time we need to parse through the mask 1386 * in order to verify exact and mask attribute lengths. 1387 */ 1388 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1389 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1390 msk_depth, option_len, 1391 extack); 1392 if (option_len < 0) 1393 return option_len; 1394 1395 mask->enc_opts.len += option_len; 1396 if (key->enc_opts.len != mask->enc_opts.len) { 1397 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1398 return -EINVAL; 1399 } 1400 break; 1401 default: 1402 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1403 return -EINVAL; 1404 } 1405 1406 if (!msk_depth) 1407 continue; 1408 1409 if (!nla_ok(nla_opt_msk, msk_depth)) { 1410 NL_SET_ERR_MSG(extack, "A mask attribute is invalid"); 1411 return -EINVAL; 1412 } 1413 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1414 } 1415 1416 return 0; 1417} 1418 1419static int fl_validate_ct_state(u16 state, struct nlattr *tb, 1420 struct netlink_ext_ack *extack) 1421{ 1422 if (state && !(state & TCA_FLOWER_KEY_CT_FLAGS_TRACKED)) { 1423 NL_SET_ERR_MSG_ATTR(extack, tb, 1424 "no trk, so no other flag can be set"); 1425 return -EINVAL; 1426 } 1427 1428 if (state & TCA_FLOWER_KEY_CT_FLAGS_NEW && 1429 state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) { 1430 NL_SET_ERR_MSG_ATTR(extack, tb, 1431 "new and est are mutually exclusive"); 1432 return -EINVAL; 1433 } 1434 1435 return 0; 1436} 1437 1438static int fl_set_key_ct(struct nlattr **tb, 1439 struct flow_dissector_key_ct *key, 1440 struct flow_dissector_key_ct *mask, 1441 struct netlink_ext_ack *extack) 1442{ 1443 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1444 int err; 1445 1446 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1447 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1448 return -EOPNOTSUPP; 1449 } 1450 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1451 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1452 sizeof(key->ct_state)); 1453 1454 err = fl_validate_ct_state(key->ct_state & mask->ct_state, 1455 tb[TCA_FLOWER_KEY_CT_STATE_MASK], 1456 extack); 1457 if (err) 1458 return err; 1459 1460 } 1461 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1462 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1463 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1464 return -EOPNOTSUPP; 1465 } 1466 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1467 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1468 sizeof(key->ct_zone)); 1469 } 1470 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1471 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1472 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1473 return -EOPNOTSUPP; 1474 } 1475 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1476 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1477 sizeof(key->ct_mark)); 1478 } 1479 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1480 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1481 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1482 return -EOPNOTSUPP; 1483 } 1484 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1485 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1486 sizeof(key->ct_labels)); 1487 } 1488 1489 return 0; 1490} 1491 1492static int fl_set_key(struct net *net, struct nlattr **tb, 1493 struct fl_flow_key *key, struct fl_flow_key *mask, 1494 struct netlink_ext_ack *extack) 1495{ 1496 __be16 ethertype; 1497 int ret = 0; 1498 1499 if (tb[TCA_FLOWER_INDEV]) { 1500 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1501 if (err < 0) 1502 return err; 1503 key->meta.ingress_ifindex = err; 1504 mask->meta.ingress_ifindex = 0xffffffff; 1505 } 1506 1507 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1508 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1509 sizeof(key->eth.dst)); 1510 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1511 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1512 sizeof(key->eth.src)); 1513 1514 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1515 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1516 1517 if (eth_type_vlan(ethertype)) { 1518 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1519 TCA_FLOWER_KEY_VLAN_PRIO, 1520 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1521 &key->vlan, &mask->vlan); 1522 1523 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1524 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1525 if (eth_type_vlan(ethertype)) { 1526 fl_set_key_vlan(tb, ethertype, 1527 TCA_FLOWER_KEY_CVLAN_ID, 1528 TCA_FLOWER_KEY_CVLAN_PRIO, 1529 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1530 &key->cvlan, &mask->cvlan); 1531 fl_set_key_val(tb, &key->basic.n_proto, 1532 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1533 &mask->basic.n_proto, 1534 TCA_FLOWER_UNSPEC, 1535 sizeof(key->basic.n_proto)); 1536 } else { 1537 key->basic.n_proto = ethertype; 1538 mask->basic.n_proto = cpu_to_be16(~0); 1539 } 1540 } 1541 } else { 1542 key->basic.n_proto = ethertype; 1543 mask->basic.n_proto = cpu_to_be16(~0); 1544 } 1545 } 1546 1547 if (key->basic.n_proto == htons(ETH_P_IP) || 1548 key->basic.n_proto == htons(ETH_P_IPV6)) { 1549 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1550 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1551 sizeof(key->basic.ip_proto)); 1552 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1553 } 1554 1555 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1556 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1557 mask->control.addr_type = ~0; 1558 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1559 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1560 sizeof(key->ipv4.src)); 1561 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1562 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1563 sizeof(key->ipv4.dst)); 1564 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1565 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1566 mask->control.addr_type = ~0; 1567 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1568 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1569 sizeof(key->ipv6.src)); 1570 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1571 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1572 sizeof(key->ipv6.dst)); 1573 } 1574 1575 if (key->basic.ip_proto == IPPROTO_TCP) { 1576 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1577 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1578 sizeof(key->tp.src)); 1579 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1580 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1581 sizeof(key->tp.dst)); 1582 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1583 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1584 sizeof(key->tcp.flags)); 1585 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1586 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1587 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1588 sizeof(key->tp.src)); 1589 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1590 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1591 sizeof(key->tp.dst)); 1592 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1593 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1594 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1595 sizeof(key->tp.src)); 1596 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1597 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1598 sizeof(key->tp.dst)); 1599 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1600 key->basic.ip_proto == IPPROTO_ICMP) { 1601 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1602 &mask->icmp.type, 1603 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1604 sizeof(key->icmp.type)); 1605 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1606 &mask->icmp.code, 1607 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1608 sizeof(key->icmp.code)); 1609 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1610 key->basic.ip_proto == IPPROTO_ICMPV6) { 1611 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1612 &mask->icmp.type, 1613 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1614 sizeof(key->icmp.type)); 1615 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1616 &mask->icmp.code, 1617 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1618 sizeof(key->icmp.code)); 1619 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1620 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1621 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls, extack); 1622 if (ret) 1623 return ret; 1624 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1625 key->basic.n_proto == htons(ETH_P_RARP)) { 1626 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1627 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1628 sizeof(key->arp.sip)); 1629 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1630 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1631 sizeof(key->arp.tip)); 1632 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1633 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1634 sizeof(key->arp.op)); 1635 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1636 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1637 sizeof(key->arp.sha)); 1638 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1639 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1640 sizeof(key->arp.tha)); 1641 } 1642 1643 if (key->basic.ip_proto == IPPROTO_TCP || 1644 key->basic.ip_proto == IPPROTO_UDP || 1645 key->basic.ip_proto == IPPROTO_SCTP) { 1646 ret = fl_set_key_port_range(tb, key, mask, extack); 1647 if (ret) 1648 return ret; 1649 } 1650 1651 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1652 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1653 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1654 mask->enc_control.addr_type = ~0; 1655 fl_set_key_val(tb, &key->enc_ipv4.src, 1656 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1657 &mask->enc_ipv4.src, 1658 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1659 sizeof(key->enc_ipv4.src)); 1660 fl_set_key_val(tb, &key->enc_ipv4.dst, 1661 TCA_FLOWER_KEY_ENC_IPV4_DST, 1662 &mask->enc_ipv4.dst, 1663 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1664 sizeof(key->enc_ipv4.dst)); 1665 } 1666 1667 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1668 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1669 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1670 mask->enc_control.addr_type = ~0; 1671 fl_set_key_val(tb, &key->enc_ipv6.src, 1672 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1673 &mask->enc_ipv6.src, 1674 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1675 sizeof(key->enc_ipv6.src)); 1676 fl_set_key_val(tb, &key->enc_ipv6.dst, 1677 TCA_FLOWER_KEY_ENC_IPV6_DST, 1678 &mask->enc_ipv6.dst, 1679 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1680 sizeof(key->enc_ipv6.dst)); 1681 } 1682 1683 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1684 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1685 sizeof(key->enc_key_id.keyid)); 1686 1687 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1688 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1689 sizeof(key->enc_tp.src)); 1690 1691 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1692 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1693 sizeof(key->enc_tp.dst)); 1694 1695 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1696 1697 fl_set_key_val(tb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 1698 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 1699 sizeof(key->hash.hash)); 1700 1701 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1702 ret = fl_set_enc_opt(tb, key, mask, extack); 1703 if (ret) 1704 return ret; 1705 } 1706 1707 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1708 if (ret) 1709 return ret; 1710 1711 if (tb[TCA_FLOWER_KEY_FLAGS]) 1712 ret = fl_set_key_flags(tb, &key->control.flags, 1713 &mask->control.flags, extack); 1714 1715 return ret; 1716} 1717 1718static void fl_mask_copy(struct fl_flow_mask *dst, 1719 struct fl_flow_mask *src) 1720{ 1721 const void *psrc = fl_key_get_start(&src->key, src); 1722 void *pdst = fl_key_get_start(&dst->key, src); 1723 1724 memcpy(pdst, psrc, fl_mask_range(src)); 1725 dst->range = src->range; 1726} 1727 1728static const struct rhashtable_params fl_ht_params = { 1729 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1730 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1731 .automatic_shrinking = true, 1732}; 1733 1734static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1735{ 1736 mask->filter_ht_params = fl_ht_params; 1737 mask->filter_ht_params.key_len = fl_mask_range(mask); 1738 mask->filter_ht_params.key_offset += mask->range.start; 1739 1740 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1741} 1742 1743#define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1744#define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1745 1746#define FL_KEY_IS_MASKED(mask, member) \ 1747 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1748 0, FL_KEY_MEMBER_SIZE(member)) \ 1749 1750#define FL_KEY_SET(keys, cnt, id, member) \ 1751 do { \ 1752 keys[cnt].key_id = id; \ 1753 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1754 cnt++; \ 1755 } while(0); 1756 1757#define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1758 do { \ 1759 if (FL_KEY_IS_MASKED(mask, member)) \ 1760 FL_KEY_SET(keys, cnt, id, member); \ 1761 } while(0); 1762 1763static void fl_init_dissector(struct flow_dissector *dissector, 1764 struct fl_flow_key *mask) 1765{ 1766 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1767 size_t cnt = 0; 1768 1769 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1770 FLOW_DISSECTOR_KEY_META, meta); 1771 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1772 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1773 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1774 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1775 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1776 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1777 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1778 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1779 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1780 FLOW_DISSECTOR_KEY_PORTS, tp); 1781 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1782 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1783 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1784 FLOW_DISSECTOR_KEY_IP, ip); 1785 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1786 FLOW_DISSECTOR_KEY_TCP, tcp); 1787 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1788 FLOW_DISSECTOR_KEY_ICMP, icmp); 1789 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1790 FLOW_DISSECTOR_KEY_ARP, arp); 1791 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1792 FLOW_DISSECTOR_KEY_MPLS, mpls); 1793 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1794 FLOW_DISSECTOR_KEY_VLAN, vlan); 1795 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1796 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1797 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1798 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1799 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1800 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1801 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1802 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1803 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1804 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1805 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1806 enc_control); 1807 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1808 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1809 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1810 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1811 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1812 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1813 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1814 FLOW_DISSECTOR_KEY_CT, ct); 1815 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1816 FLOW_DISSECTOR_KEY_HASH, hash); 1817 1818 skb_flow_dissector_init(dissector, keys, cnt); 1819} 1820 1821static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1822 struct fl_flow_mask *mask) 1823{ 1824 struct fl_flow_mask *newmask; 1825 int err; 1826 1827 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1828 if (!newmask) 1829 return ERR_PTR(-ENOMEM); 1830 1831 fl_mask_copy(newmask, mask); 1832 1833 if ((newmask->key.tp_range.tp_min.dst && 1834 newmask->key.tp_range.tp_max.dst) || 1835 (newmask->key.tp_range.tp_min.src && 1836 newmask->key.tp_range.tp_max.src)) 1837 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1838 1839 err = fl_init_mask_hashtable(newmask); 1840 if (err) 1841 goto errout_free; 1842 1843 fl_init_dissector(&newmask->dissector, &newmask->key); 1844 1845 INIT_LIST_HEAD_RCU(&newmask->filters); 1846 1847 refcount_set(&newmask->refcnt, 1); 1848 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1849 &newmask->ht_node, mask_ht_params); 1850 if (err) 1851 goto errout_destroy; 1852 1853 spin_lock(&head->masks_lock); 1854 list_add_tail_rcu(&newmask->list, &head->masks); 1855 spin_unlock(&head->masks_lock); 1856 1857 return newmask; 1858 1859errout_destroy: 1860 rhashtable_destroy(&newmask->ht); 1861errout_free: 1862 kfree(newmask); 1863 1864 return ERR_PTR(err); 1865} 1866 1867static int fl_check_assign_mask(struct cls_fl_head *head, 1868 struct cls_fl_filter *fnew, 1869 struct cls_fl_filter *fold, 1870 struct fl_flow_mask *mask) 1871{ 1872 struct fl_flow_mask *newmask; 1873 int ret = 0; 1874 1875 rcu_read_lock(); 1876 1877 /* Insert mask as temporary node to prevent concurrent creation of mask 1878 * with same key. Any concurrent lookups with same key will return 1879 * -EAGAIN because mask's refcnt is zero. 1880 */ 1881 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1882 &mask->ht_node, 1883 mask_ht_params); 1884 if (!fnew->mask) { 1885 rcu_read_unlock(); 1886 1887 if (fold) { 1888 ret = -EINVAL; 1889 goto errout_cleanup; 1890 } 1891 1892 newmask = fl_create_new_mask(head, mask); 1893 if (IS_ERR(newmask)) { 1894 ret = PTR_ERR(newmask); 1895 goto errout_cleanup; 1896 } 1897 1898 fnew->mask = newmask; 1899 return 0; 1900 } else if (IS_ERR(fnew->mask)) { 1901 ret = PTR_ERR(fnew->mask); 1902 } else if (fold && fold->mask != fnew->mask) { 1903 ret = -EINVAL; 1904 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1905 /* Mask was deleted concurrently, try again */ 1906 ret = -EAGAIN; 1907 } 1908 rcu_read_unlock(); 1909 return ret; 1910 1911errout_cleanup: 1912 rhashtable_remove_fast(&head->ht, &mask->ht_node, 1913 mask_ht_params); 1914 return ret; 1915} 1916 1917static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1918 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1919 unsigned long base, struct nlattr **tb, 1920 struct nlattr *est, bool ovr, 1921 struct fl_flow_tmplt *tmplt, bool rtnl_held, 1922 struct netlink_ext_ack *extack) 1923{ 1924 int err; 1925 1926 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held, 1927 extack); 1928 if (err < 0) 1929 return err; 1930 1931 if (tb[TCA_FLOWER_CLASSID]) { 1932 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1933 if (!rtnl_held) 1934 rtnl_lock(); 1935 tcf_bind_filter(tp, &f->res, base); 1936 if (!rtnl_held) 1937 rtnl_unlock(); 1938 } 1939 1940 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1941 if (err) 1942 return err; 1943 1944 fl_mask_update_range(mask); 1945 fl_set_masked_key(&f->mkey, &f->key, mask); 1946 1947 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1948 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1949 return -EINVAL; 1950 } 1951 1952 return 0; 1953} 1954 1955static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 1956 struct cls_fl_filter *fold, 1957 bool *in_ht) 1958{ 1959 struct fl_flow_mask *mask = fnew->mask; 1960 int err; 1961 1962 err = rhashtable_lookup_insert_fast(&mask->ht, 1963 &fnew->ht_node, 1964 mask->filter_ht_params); 1965 if (err) { 1966 *in_ht = false; 1967 /* It is okay if filter with same key exists when 1968 * overwriting. 1969 */ 1970 return fold && err == -EEXIST ? 0 : err; 1971 } 1972 1973 *in_ht = true; 1974 return 0; 1975} 1976 1977static int fl_change(struct net *net, struct sk_buff *in_skb, 1978 struct tcf_proto *tp, unsigned long base, 1979 u32 handle, struct nlattr **tca, 1980 void **arg, bool ovr, bool rtnl_held, 1981 struct netlink_ext_ack *extack) 1982{ 1983 struct cls_fl_head *head = fl_head_dereference(tp); 1984 struct cls_fl_filter *fold = *arg; 1985 struct cls_fl_filter *fnew; 1986 struct fl_flow_mask *mask; 1987 struct nlattr **tb; 1988 bool in_ht; 1989 int err; 1990 1991 if (!tca[TCA_OPTIONS]) { 1992 err = -EINVAL; 1993 goto errout_fold; 1994 } 1995 1996 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1997 if (!mask) { 1998 err = -ENOBUFS; 1999 goto errout_fold; 2000 } 2001 2002 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2003 if (!tb) { 2004 err = -ENOBUFS; 2005 goto errout_mask_alloc; 2006 } 2007 2008 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2009 tca[TCA_OPTIONS], fl_policy, NULL); 2010 if (err < 0) 2011 goto errout_tb; 2012 2013 if (fold && handle && fold->handle != handle) { 2014 err = -EINVAL; 2015 goto errout_tb; 2016 } 2017 2018 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 2019 if (!fnew) { 2020 err = -ENOBUFS; 2021 goto errout_tb; 2022 } 2023 INIT_LIST_HEAD(&fnew->hw_list); 2024 refcount_set(&fnew->refcnt, 1); 2025 2026 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 2027 if (err < 0) 2028 goto errout; 2029 2030 if (tb[TCA_FLOWER_FLAGS]) { 2031 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 2032 2033 if (!tc_flags_valid(fnew->flags)) { 2034 err = -EINVAL; 2035 goto errout; 2036 } 2037 } 2038 2039 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 2040 tp->chain->tmplt_priv, rtnl_held, extack); 2041 if (err) 2042 goto errout; 2043 2044 err = fl_check_assign_mask(head, fnew, fold, mask); 2045 if (err) 2046 goto errout; 2047 2048 err = fl_ht_insert_unique(fnew, fold, &in_ht); 2049 if (err) 2050 goto errout_mask; 2051 2052 if (!tc_skip_hw(fnew->flags)) { 2053 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 2054 if (err) 2055 goto errout_ht; 2056 } 2057 2058 if (!tc_in_hw(fnew->flags)) 2059 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 2060 2061 spin_lock(&tp->lock); 2062 2063 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 2064 * proto again or create new one, if necessary. 2065 */ 2066 if (tp->deleting) { 2067 err = -EAGAIN; 2068 goto errout_hw; 2069 } 2070 2071 if (fold) { 2072 /* Fold filter was deleted concurrently. Retry lookup. */ 2073 if (fold->deleted) { 2074 err = -EAGAIN; 2075 goto errout_hw; 2076 } 2077 2078 fnew->handle = handle; 2079 2080 if (!in_ht) { 2081 struct rhashtable_params params = 2082 fnew->mask->filter_ht_params; 2083 2084 err = rhashtable_insert_fast(&fnew->mask->ht, 2085 &fnew->ht_node, 2086 params); 2087 if (err) 2088 goto errout_hw; 2089 in_ht = true; 2090 } 2091 2092 refcount_inc(&fnew->refcnt); 2093 rhashtable_remove_fast(&fold->mask->ht, 2094 &fold->ht_node, 2095 fold->mask->filter_ht_params); 2096 idr_replace(&head->handle_idr, fnew, fnew->handle); 2097 list_replace_rcu(&fold->list, &fnew->list); 2098 fold->deleted = true; 2099 2100 spin_unlock(&tp->lock); 2101 2102 fl_mask_put(head, fold->mask); 2103 if (!tc_skip_hw(fold->flags)) 2104 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 2105 tcf_unbind_filter(tp, &fold->res); 2106 /* Caller holds reference to fold, so refcnt is always > 0 2107 * after this. 2108 */ 2109 refcount_dec(&fold->refcnt); 2110 __fl_put(fold); 2111 } else { 2112 if (handle) { 2113 /* user specifies a handle and it doesn't exist */ 2114 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2115 handle, GFP_ATOMIC); 2116 2117 /* Filter with specified handle was concurrently 2118 * inserted after initial check in cls_api. This is not 2119 * necessarily an error if NLM_F_EXCL is not set in 2120 * message flags. Returning EAGAIN will cause cls_api to 2121 * try to update concurrently inserted rule. 2122 */ 2123 if (err == -ENOSPC) 2124 err = -EAGAIN; 2125 } else { 2126 handle = 1; 2127 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 2128 INT_MAX, GFP_ATOMIC); 2129 } 2130 if (err) 2131 goto errout_hw; 2132 2133 refcount_inc(&fnew->refcnt); 2134 fnew->handle = handle; 2135 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 2136 spin_unlock(&tp->lock); 2137 } 2138 2139 *arg = fnew; 2140 2141 kfree(tb); 2142 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2143 return 0; 2144 2145errout_ht: 2146 spin_lock(&tp->lock); 2147errout_hw: 2148 fnew->deleted = true; 2149 spin_unlock(&tp->lock); 2150 if (!tc_skip_hw(fnew->flags)) 2151 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 2152 if (in_ht) 2153 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 2154 fnew->mask->filter_ht_params); 2155errout_mask: 2156 fl_mask_put(head, fnew->mask); 2157errout: 2158 __fl_put(fnew); 2159errout_tb: 2160 kfree(tb); 2161errout_mask_alloc: 2162 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 2163errout_fold: 2164 if (fold) 2165 __fl_put(fold); 2166 return err; 2167} 2168 2169static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 2170 bool rtnl_held, struct netlink_ext_ack *extack) 2171{ 2172 struct cls_fl_head *head = fl_head_dereference(tp); 2173 struct cls_fl_filter *f = arg; 2174 bool last_on_mask; 2175 int err = 0; 2176 2177 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 2178 *last = list_empty(&head->masks); 2179 __fl_put(f); 2180 2181 return err; 2182} 2183 2184static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 2185 bool rtnl_held) 2186{ 2187 struct cls_fl_head *head = fl_head_dereference(tp); 2188 unsigned long id = arg->cookie, tmp; 2189 struct cls_fl_filter *f; 2190 2191 arg->count = arg->skip; 2192 2193 rcu_read_lock(); 2194 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 2195 /* don't return filters that are being deleted */ 2196 if (!refcount_inc_not_zero(&f->refcnt)) 2197 continue; 2198 rcu_read_unlock(); 2199 2200 if (arg->fn(tp, f, arg) < 0) { 2201 __fl_put(f); 2202 arg->stop = 1; 2203 rcu_read_lock(); 2204 break; 2205 } 2206 __fl_put(f); 2207 arg->count++; 2208 rcu_read_lock(); 2209 } 2210 rcu_read_unlock(); 2211 arg->cookie = id; 2212} 2213 2214static struct cls_fl_filter * 2215fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 2216{ 2217 struct cls_fl_head *head = fl_head_dereference(tp); 2218 2219 spin_lock(&tp->lock); 2220 if (list_empty(&head->hw_filters)) { 2221 spin_unlock(&tp->lock); 2222 return NULL; 2223 } 2224 2225 if (!f) 2226 f = list_entry(&head->hw_filters, struct cls_fl_filter, 2227 hw_list); 2228 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 2229 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 2230 spin_unlock(&tp->lock); 2231 return f; 2232 } 2233 } 2234 2235 spin_unlock(&tp->lock); 2236 return NULL; 2237} 2238 2239static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 2240 void *cb_priv, struct netlink_ext_ack *extack) 2241{ 2242 struct tcf_block *block = tp->chain->block; 2243 struct flow_cls_offload cls_flower = {}; 2244 struct cls_fl_filter *f = NULL; 2245 int err; 2246 2247 /* hw_filters list can only be changed by hw offload functions after 2248 * obtaining rtnl lock. Make sure it is not changed while reoffload is 2249 * iterating it. 2250 */ 2251 ASSERT_RTNL(); 2252 2253 while ((f = fl_get_next_hw_filter(tp, f, add))) { 2254 cls_flower.rule = 2255 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 2256 if (!cls_flower.rule) { 2257 __fl_put(f); 2258 return -ENOMEM; 2259 } 2260 2261 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 2262 extack); 2263 cls_flower.command = add ? 2264 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 2265 cls_flower.cookie = (unsigned long)f; 2266 cls_flower.rule->match.dissector = &f->mask->dissector; 2267 cls_flower.rule->match.mask = &f->mask->key; 2268 cls_flower.rule->match.key = &f->mkey; 2269 2270 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 2271 if (err) { 2272 kfree(cls_flower.rule); 2273 if (tc_skip_sw(f->flags)) { 2274 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 2275 __fl_put(f); 2276 return err; 2277 } 2278 goto next_flow; 2279 } 2280 2281 cls_flower.classid = f->res.classid; 2282 2283 err = tc_setup_cb_reoffload(block, tp, add, cb, 2284 TC_SETUP_CLSFLOWER, &cls_flower, 2285 cb_priv, &f->flags, 2286 &f->in_hw_count); 2287 tc_cleanup_flow_action(&cls_flower.rule->action); 2288 kfree(cls_flower.rule); 2289 2290 if (err) { 2291 __fl_put(f); 2292 return err; 2293 } 2294next_flow: 2295 __fl_put(f); 2296 } 2297 2298 return 0; 2299} 2300 2301static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2302{ 2303 struct flow_cls_offload *cls_flower = type_data; 2304 struct cls_fl_filter *f = 2305 (struct cls_fl_filter *) cls_flower->cookie; 2306 struct cls_fl_head *head = fl_head_dereference(tp); 2307 2308 spin_lock(&tp->lock); 2309 list_add(&f->hw_list, &head->hw_filters); 2310 spin_unlock(&tp->lock); 2311} 2312 2313static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2314{ 2315 struct flow_cls_offload *cls_flower = type_data; 2316 struct cls_fl_filter *f = 2317 (struct cls_fl_filter *) cls_flower->cookie; 2318 2319 spin_lock(&tp->lock); 2320 if (!list_empty(&f->hw_list)) 2321 list_del_init(&f->hw_list); 2322 spin_unlock(&tp->lock); 2323} 2324 2325static int fl_hw_create_tmplt(struct tcf_chain *chain, 2326 struct fl_flow_tmplt *tmplt) 2327{ 2328 struct flow_cls_offload cls_flower = {}; 2329 struct tcf_block *block = chain->block; 2330 2331 cls_flower.rule = flow_rule_alloc(0); 2332 if (!cls_flower.rule) 2333 return -ENOMEM; 2334 2335 cls_flower.common.chain_index = chain->index; 2336 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2337 cls_flower.cookie = (unsigned long) tmplt; 2338 cls_flower.rule->match.dissector = &tmplt->dissector; 2339 cls_flower.rule->match.mask = &tmplt->mask; 2340 cls_flower.rule->match.key = &tmplt->dummy_key; 2341 2342 /* We don't care if driver (any of them) fails to handle this 2343 * call. It serves just as a hint for it. 2344 */ 2345 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2346 kfree(cls_flower.rule); 2347 2348 return 0; 2349} 2350 2351static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2352 struct fl_flow_tmplt *tmplt) 2353{ 2354 struct flow_cls_offload cls_flower = {}; 2355 struct tcf_block *block = chain->block; 2356 2357 cls_flower.common.chain_index = chain->index; 2358 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2359 cls_flower.cookie = (unsigned long) tmplt; 2360 2361 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2362} 2363 2364static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2365 struct nlattr **tca, 2366 struct netlink_ext_ack *extack) 2367{ 2368 struct fl_flow_tmplt *tmplt; 2369 struct nlattr **tb; 2370 int err; 2371 2372 if (!tca[TCA_OPTIONS]) 2373 return ERR_PTR(-EINVAL); 2374 2375 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2376 if (!tb) 2377 return ERR_PTR(-ENOBUFS); 2378 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2379 tca[TCA_OPTIONS], fl_policy, NULL); 2380 if (err) 2381 goto errout_tb; 2382 2383 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2384 if (!tmplt) { 2385 err = -ENOMEM; 2386 goto errout_tb; 2387 } 2388 tmplt->chain = chain; 2389 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2390 if (err) 2391 goto errout_tmplt; 2392 2393 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2394 2395 err = fl_hw_create_tmplt(chain, tmplt); 2396 if (err) 2397 goto errout_tmplt; 2398 2399 kfree(tb); 2400 return tmplt; 2401 2402errout_tmplt: 2403 kfree(tmplt); 2404errout_tb: 2405 kfree(tb); 2406 return ERR_PTR(err); 2407} 2408 2409static void fl_tmplt_destroy(void *tmplt_priv) 2410{ 2411 struct fl_flow_tmplt *tmplt = tmplt_priv; 2412 2413 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2414 kfree(tmplt); 2415} 2416 2417static int fl_dump_key_val(struct sk_buff *skb, 2418 void *val, int val_type, 2419 void *mask, int mask_type, int len) 2420{ 2421 int err; 2422 2423 if (!memchr_inv(mask, 0, len)) 2424 return 0; 2425 err = nla_put(skb, val_type, len, val); 2426 if (err) 2427 return err; 2428 if (mask_type != TCA_FLOWER_UNSPEC) { 2429 err = nla_put(skb, mask_type, len, mask); 2430 if (err) 2431 return err; 2432 } 2433 return 0; 2434} 2435 2436static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2437 struct fl_flow_key *mask) 2438{ 2439 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2440 TCA_FLOWER_KEY_PORT_DST_MIN, 2441 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2442 sizeof(key->tp_range.tp_min.dst)) || 2443 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2444 TCA_FLOWER_KEY_PORT_DST_MAX, 2445 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2446 sizeof(key->tp_range.tp_max.dst)) || 2447 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2448 TCA_FLOWER_KEY_PORT_SRC_MIN, 2449 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2450 sizeof(key->tp_range.tp_min.src)) || 2451 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2452 TCA_FLOWER_KEY_PORT_SRC_MAX, 2453 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2454 sizeof(key->tp_range.tp_max.src))) 2455 return -1; 2456 2457 return 0; 2458} 2459 2460static int fl_dump_key_mpls_opt_lse(struct sk_buff *skb, 2461 struct flow_dissector_key_mpls *mpls_key, 2462 struct flow_dissector_key_mpls *mpls_mask, 2463 u8 lse_index) 2464{ 2465 struct flow_dissector_mpls_lse *lse_mask = &mpls_mask->ls[lse_index]; 2466 struct flow_dissector_mpls_lse *lse_key = &mpls_key->ls[lse_index]; 2467 int err; 2468 2469 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_DEPTH, 2470 lse_index + 1); 2471 if (err) 2472 return err; 2473 2474 if (lse_mask->mpls_ttl) { 2475 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TTL, 2476 lse_key->mpls_ttl); 2477 if (err) 2478 return err; 2479 } 2480 if (lse_mask->mpls_bos) { 2481 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_BOS, 2482 lse_key->mpls_bos); 2483 if (err) 2484 return err; 2485 } 2486 if (lse_mask->mpls_tc) { 2487 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_TC, 2488 lse_key->mpls_tc); 2489 if (err) 2490 return err; 2491 } 2492 if (lse_mask->mpls_label) { 2493 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_OPT_LSE_LABEL, 2494 lse_key->mpls_label); 2495 if (err) 2496 return err; 2497 } 2498 2499 return 0; 2500} 2501 2502static int fl_dump_key_mpls_opts(struct sk_buff *skb, 2503 struct flow_dissector_key_mpls *mpls_key, 2504 struct flow_dissector_key_mpls *mpls_mask) 2505{ 2506 struct nlattr *opts; 2507 struct nlattr *lse; 2508 u8 lse_index; 2509 int err; 2510 2511 opts = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS); 2512 if (!opts) 2513 return -EMSGSIZE; 2514 2515 for (lse_index = 0; lse_index < FLOW_DIS_MPLS_MAX; lse_index++) { 2516 if (!(mpls_mask->used_lses & 1 << lse_index)) 2517 continue; 2518 2519 lse = nla_nest_start(skb, TCA_FLOWER_KEY_MPLS_OPTS_LSE); 2520 if (!lse) { 2521 err = -EMSGSIZE; 2522 goto err_opts; 2523 } 2524 2525 err = fl_dump_key_mpls_opt_lse(skb, mpls_key, mpls_mask, 2526 lse_index); 2527 if (err) 2528 goto err_opts_lse; 2529 nla_nest_end(skb, lse); 2530 } 2531 nla_nest_end(skb, opts); 2532 2533 return 0; 2534 2535err_opts_lse: 2536 nla_nest_cancel(skb, lse); 2537err_opts: 2538 nla_nest_cancel(skb, opts); 2539 2540 return err; 2541} 2542 2543static int fl_dump_key_mpls(struct sk_buff *skb, 2544 struct flow_dissector_key_mpls *mpls_key, 2545 struct flow_dissector_key_mpls *mpls_mask) 2546{ 2547 struct flow_dissector_mpls_lse *lse_mask; 2548 struct flow_dissector_mpls_lse *lse_key; 2549 int err; 2550 2551 if (!mpls_mask->used_lses) 2552 return 0; 2553 2554 lse_mask = &mpls_mask->ls[0]; 2555 lse_key = &mpls_key->ls[0]; 2556 2557 /* For backward compatibility, don't use the MPLS nested attributes if 2558 * the rule can be expressed using the old attributes. 2559 */ 2560 if (mpls_mask->used_lses & ~1 || 2561 (!lse_mask->mpls_ttl && !lse_mask->mpls_bos && 2562 !lse_mask->mpls_tc && !lse_mask->mpls_label)) 2563 return fl_dump_key_mpls_opts(skb, mpls_key, mpls_mask); 2564 2565 if (lse_mask->mpls_ttl) { 2566 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2567 lse_key->mpls_ttl); 2568 if (err) 2569 return err; 2570 } 2571 if (lse_mask->mpls_tc) { 2572 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2573 lse_key->mpls_tc); 2574 if (err) 2575 return err; 2576 } 2577 if (lse_mask->mpls_label) { 2578 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2579 lse_key->mpls_label); 2580 if (err) 2581 return err; 2582 } 2583 if (lse_mask->mpls_bos) { 2584 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2585 lse_key->mpls_bos); 2586 if (err) 2587 return err; 2588 } 2589 return 0; 2590} 2591 2592static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2593 struct flow_dissector_key_ip *key, 2594 struct flow_dissector_key_ip *mask) 2595{ 2596 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2597 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2598 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2599 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2600 2601 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2602 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2603 return -1; 2604 2605 return 0; 2606} 2607 2608static int fl_dump_key_vlan(struct sk_buff *skb, 2609 int vlan_id_key, int vlan_prio_key, 2610 struct flow_dissector_key_vlan *vlan_key, 2611 struct flow_dissector_key_vlan *vlan_mask) 2612{ 2613 int err; 2614 2615 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2616 return 0; 2617 if (vlan_mask->vlan_id) { 2618 err = nla_put_u16(skb, vlan_id_key, 2619 vlan_key->vlan_id); 2620 if (err) 2621 return err; 2622 } 2623 if (vlan_mask->vlan_priority) { 2624 err = nla_put_u8(skb, vlan_prio_key, 2625 vlan_key->vlan_priority); 2626 if (err) 2627 return err; 2628 } 2629 return 0; 2630} 2631 2632static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2633 u32 *flower_key, u32 *flower_mask, 2634 u32 flower_flag_bit, u32 dissector_flag_bit) 2635{ 2636 if (dissector_mask & dissector_flag_bit) { 2637 *flower_mask |= flower_flag_bit; 2638 if (dissector_key & dissector_flag_bit) 2639 *flower_key |= flower_flag_bit; 2640 } 2641} 2642 2643static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2644{ 2645 u32 key, mask; 2646 __be32 _key, _mask; 2647 int err; 2648 2649 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2650 return 0; 2651 2652 key = 0; 2653 mask = 0; 2654 2655 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2656 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2657 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2658 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2659 FLOW_DIS_FIRST_FRAG); 2660 2661 _key = cpu_to_be32(key); 2662 _mask = cpu_to_be32(mask); 2663 2664 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2665 if (err) 2666 return err; 2667 2668 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2669} 2670 2671static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2672 struct flow_dissector_key_enc_opts *enc_opts) 2673{ 2674 struct geneve_opt *opt; 2675 struct nlattr *nest; 2676 int opt_off = 0; 2677 2678 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2679 if (!nest) 2680 goto nla_put_failure; 2681 2682 while (enc_opts->len > opt_off) { 2683 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2684 2685 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2686 opt->opt_class)) 2687 goto nla_put_failure; 2688 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2689 opt->type)) 2690 goto nla_put_failure; 2691 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2692 opt->length * 4, opt->opt_data)) 2693 goto nla_put_failure; 2694 2695 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2696 } 2697 nla_nest_end(skb, nest); 2698 return 0; 2699 2700nla_put_failure: 2701 nla_nest_cancel(skb, nest); 2702 return -EMSGSIZE; 2703} 2704 2705static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2706 struct flow_dissector_key_enc_opts *enc_opts) 2707{ 2708 struct vxlan_metadata *md; 2709 struct nlattr *nest; 2710 2711 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2712 if (!nest) 2713 goto nla_put_failure; 2714 2715 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2716 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2717 goto nla_put_failure; 2718 2719 nla_nest_end(skb, nest); 2720 return 0; 2721 2722nla_put_failure: 2723 nla_nest_cancel(skb, nest); 2724 return -EMSGSIZE; 2725} 2726 2727static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2728 struct flow_dissector_key_enc_opts *enc_opts) 2729{ 2730 struct erspan_metadata *md; 2731 struct nlattr *nest; 2732 2733 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2734 if (!nest) 2735 goto nla_put_failure; 2736 2737 md = (struct erspan_metadata *)&enc_opts->data[0]; 2738 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2739 goto nla_put_failure; 2740 2741 if (md->version == 1 && 2742 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2743 goto nla_put_failure; 2744 2745 if (md->version == 2 && 2746 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2747 md->u.md2.dir) || 2748 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2749 get_hwid(&md->u.md2)))) 2750 goto nla_put_failure; 2751 2752 nla_nest_end(skb, nest); 2753 return 0; 2754 2755nla_put_failure: 2756 nla_nest_cancel(skb, nest); 2757 return -EMSGSIZE; 2758} 2759 2760static int fl_dump_key_ct(struct sk_buff *skb, 2761 struct flow_dissector_key_ct *key, 2762 struct flow_dissector_key_ct *mask) 2763{ 2764 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2765 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2766 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2767 sizeof(key->ct_state))) 2768 goto nla_put_failure; 2769 2770 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2771 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2772 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2773 sizeof(key->ct_zone))) 2774 goto nla_put_failure; 2775 2776 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2777 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2778 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2779 sizeof(key->ct_mark))) 2780 goto nla_put_failure; 2781 2782 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2783 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2784 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2785 sizeof(key->ct_labels))) 2786 goto nla_put_failure; 2787 2788 return 0; 2789 2790nla_put_failure: 2791 return -EMSGSIZE; 2792} 2793 2794static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2795 struct flow_dissector_key_enc_opts *enc_opts) 2796{ 2797 struct nlattr *nest; 2798 int err; 2799 2800 if (!enc_opts->len) 2801 return 0; 2802 2803 nest = nla_nest_start_noflag(skb, enc_opt_type); 2804 if (!nest) 2805 goto nla_put_failure; 2806 2807 switch (enc_opts->dst_opt_type) { 2808 case TUNNEL_GENEVE_OPT: 2809 err = fl_dump_key_geneve_opt(skb, enc_opts); 2810 if (err) 2811 goto nla_put_failure; 2812 break; 2813 case TUNNEL_VXLAN_OPT: 2814 err = fl_dump_key_vxlan_opt(skb, enc_opts); 2815 if (err) 2816 goto nla_put_failure; 2817 break; 2818 case TUNNEL_ERSPAN_OPT: 2819 err = fl_dump_key_erspan_opt(skb, enc_opts); 2820 if (err) 2821 goto nla_put_failure; 2822 break; 2823 default: 2824 goto nla_put_failure; 2825 } 2826 nla_nest_end(skb, nest); 2827 return 0; 2828 2829nla_put_failure: 2830 nla_nest_cancel(skb, nest); 2831 return -EMSGSIZE; 2832} 2833 2834static int fl_dump_key_enc_opt(struct sk_buff *skb, 2835 struct flow_dissector_key_enc_opts *key_opts, 2836 struct flow_dissector_key_enc_opts *msk_opts) 2837{ 2838 int err; 2839 2840 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2841 if (err) 2842 return err; 2843 2844 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2845} 2846 2847static int fl_dump_key(struct sk_buff *skb, struct net *net, 2848 struct fl_flow_key *key, struct fl_flow_key *mask) 2849{ 2850 if (mask->meta.ingress_ifindex) { 2851 struct net_device *dev; 2852 2853 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 2854 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2855 goto nla_put_failure; 2856 } 2857 2858 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2859 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2860 sizeof(key->eth.dst)) || 2861 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2862 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2863 sizeof(key->eth.src)) || 2864 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2865 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2866 sizeof(key->basic.n_proto))) 2867 goto nla_put_failure; 2868 2869 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2870 goto nla_put_failure; 2871 2872 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 2873 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 2874 goto nla_put_failure; 2875 2876 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 2877 TCA_FLOWER_KEY_CVLAN_PRIO, 2878 &key->cvlan, &mask->cvlan) || 2879 (mask->cvlan.vlan_tpid && 2880 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2881 key->cvlan.vlan_tpid))) 2882 goto nla_put_failure; 2883 2884 if (mask->basic.n_proto) { 2885 if (mask->cvlan.vlan_eth_type) { 2886 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 2887 key->basic.n_proto)) 2888 goto nla_put_failure; 2889 } else if (mask->vlan.vlan_eth_type) { 2890 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2891 key->vlan.vlan_eth_type)) 2892 goto nla_put_failure; 2893 } 2894 } 2895 2896 if ((key->basic.n_proto == htons(ETH_P_IP) || 2897 key->basic.n_proto == htons(ETH_P_IPV6)) && 2898 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 2899 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 2900 sizeof(key->basic.ip_proto)) || 2901 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 2902 goto nla_put_failure; 2903 2904 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2905 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 2906 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 2907 sizeof(key->ipv4.src)) || 2908 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 2909 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 2910 sizeof(key->ipv4.dst)))) 2911 goto nla_put_failure; 2912 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2913 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 2914 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 2915 sizeof(key->ipv6.src)) || 2916 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 2917 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 2918 sizeof(key->ipv6.dst)))) 2919 goto nla_put_failure; 2920 2921 if (key->basic.ip_proto == IPPROTO_TCP && 2922 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 2923 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 2924 sizeof(key->tp.src)) || 2925 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 2926 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 2927 sizeof(key->tp.dst)) || 2928 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 2929 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 2930 sizeof(key->tcp.flags)))) 2931 goto nla_put_failure; 2932 else if (key->basic.ip_proto == IPPROTO_UDP && 2933 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2934 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2935 sizeof(key->tp.src)) || 2936 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2937 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2938 sizeof(key->tp.dst)))) 2939 goto nla_put_failure; 2940 else if (key->basic.ip_proto == IPPROTO_SCTP && 2941 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2942 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2943 sizeof(key->tp.src)) || 2944 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2945 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2946 sizeof(key->tp.dst)))) 2947 goto nla_put_failure; 2948 else if (key->basic.n_proto == htons(ETH_P_IP) && 2949 key->basic.ip_proto == IPPROTO_ICMP && 2950 (fl_dump_key_val(skb, &key->icmp.type, 2951 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 2952 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2953 sizeof(key->icmp.type)) || 2954 fl_dump_key_val(skb, &key->icmp.code, 2955 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 2956 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2957 sizeof(key->icmp.code)))) 2958 goto nla_put_failure; 2959 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2960 key->basic.ip_proto == IPPROTO_ICMPV6 && 2961 (fl_dump_key_val(skb, &key->icmp.type, 2962 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 2963 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2964 sizeof(key->icmp.type)) || 2965 fl_dump_key_val(skb, &key->icmp.code, 2966 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 2967 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2968 sizeof(key->icmp.code)))) 2969 goto nla_put_failure; 2970 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 2971 key->basic.n_proto == htons(ETH_P_RARP)) && 2972 (fl_dump_key_val(skb, &key->arp.sip, 2973 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 2974 TCA_FLOWER_KEY_ARP_SIP_MASK, 2975 sizeof(key->arp.sip)) || 2976 fl_dump_key_val(skb, &key->arp.tip, 2977 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 2978 TCA_FLOWER_KEY_ARP_TIP_MASK, 2979 sizeof(key->arp.tip)) || 2980 fl_dump_key_val(skb, &key->arp.op, 2981 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 2982 TCA_FLOWER_KEY_ARP_OP_MASK, 2983 sizeof(key->arp.op)) || 2984 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2985 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2986 sizeof(key->arp.sha)) || 2987 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2988 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2989 sizeof(key->arp.tha)))) 2990 goto nla_put_failure; 2991 2992 if ((key->basic.ip_proto == IPPROTO_TCP || 2993 key->basic.ip_proto == IPPROTO_UDP || 2994 key->basic.ip_proto == IPPROTO_SCTP) && 2995 fl_dump_key_port_range(skb, key, mask)) 2996 goto nla_put_failure; 2997 2998 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2999 (fl_dump_key_val(skb, &key->enc_ipv4.src, 3000 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 3001 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 3002 sizeof(key->enc_ipv4.src)) || 3003 fl_dump_key_val(skb, &key->enc_ipv4.dst, 3004 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 3005 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 3006 sizeof(key->enc_ipv4.dst)))) 3007 goto nla_put_failure; 3008 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 3009 (fl_dump_key_val(skb, &key->enc_ipv6.src, 3010 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 3011 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 3012 sizeof(key->enc_ipv6.src)) || 3013 fl_dump_key_val(skb, &key->enc_ipv6.dst, 3014 TCA_FLOWER_KEY_ENC_IPV6_DST, 3015 &mask->enc_ipv6.dst, 3016 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 3017 sizeof(key->enc_ipv6.dst)))) 3018 goto nla_put_failure; 3019 3020 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 3021 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 3022 sizeof(key->enc_key_id)) || 3023 fl_dump_key_val(skb, &key->enc_tp.src, 3024 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 3025 &mask->enc_tp.src, 3026 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 3027 sizeof(key->enc_tp.src)) || 3028 fl_dump_key_val(skb, &key->enc_tp.dst, 3029 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 3030 &mask->enc_tp.dst, 3031 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 3032 sizeof(key->enc_tp.dst)) || 3033 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 3034 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 3035 goto nla_put_failure; 3036 3037 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 3038 goto nla_put_failure; 3039 3040 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 3041 goto nla_put_failure; 3042 3043 if (fl_dump_key_val(skb, &key->hash.hash, TCA_FLOWER_KEY_HASH, 3044 &mask->hash.hash, TCA_FLOWER_KEY_HASH_MASK, 3045 sizeof(key->hash.hash))) 3046 goto nla_put_failure; 3047 3048 return 0; 3049 3050nla_put_failure: 3051 return -EMSGSIZE; 3052} 3053 3054static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 3055 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3056{ 3057 struct cls_fl_filter *f = fh; 3058 struct nlattr *nest; 3059 struct fl_flow_key *key, *mask; 3060 bool skip_hw; 3061 3062 if (!f) 3063 return skb->len; 3064 3065 t->tcm_handle = f->handle; 3066 3067 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3068 if (!nest) 3069 goto nla_put_failure; 3070 3071 spin_lock(&tp->lock); 3072 3073 if (f->res.classid && 3074 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 3075 goto nla_put_failure_locked; 3076 3077 key = &f->key; 3078 mask = &f->mask->key; 3079 skip_hw = tc_skip_hw(f->flags); 3080 3081 if (fl_dump_key(skb, net, key, mask)) 3082 goto nla_put_failure_locked; 3083 3084 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3085 goto nla_put_failure_locked; 3086 3087 spin_unlock(&tp->lock); 3088 3089 if (!skip_hw) 3090 fl_hw_update_stats(tp, f, rtnl_held); 3091 3092 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 3093 goto nla_put_failure; 3094 3095 if (tcf_exts_dump(skb, &f->exts)) 3096 goto nla_put_failure; 3097 3098 nla_nest_end(skb, nest); 3099 3100 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 3101 goto nla_put_failure; 3102 3103 return skb->len; 3104 3105nla_put_failure_locked: 3106 spin_unlock(&tp->lock); 3107nla_put_failure: 3108 nla_nest_cancel(skb, nest); 3109 return -1; 3110} 3111 3112static int fl_terse_dump(struct net *net, struct tcf_proto *tp, void *fh, 3113 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 3114{ 3115 struct cls_fl_filter *f = fh; 3116 struct nlattr *nest; 3117 bool skip_hw; 3118 3119 if (!f) 3120 return skb->len; 3121 3122 t->tcm_handle = f->handle; 3123 3124 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3125 if (!nest) 3126 goto nla_put_failure; 3127 3128 spin_lock(&tp->lock); 3129 3130 skip_hw = tc_skip_hw(f->flags); 3131 3132 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 3133 goto nla_put_failure_locked; 3134 3135 spin_unlock(&tp->lock); 3136 3137 if (!skip_hw) 3138 fl_hw_update_stats(tp, f, rtnl_held); 3139 3140 if (tcf_exts_terse_dump(skb, &f->exts)) 3141 goto nla_put_failure; 3142 3143 nla_nest_end(skb, nest); 3144 3145 return skb->len; 3146 3147nla_put_failure_locked: 3148 spin_unlock(&tp->lock); 3149nla_put_failure: 3150 nla_nest_cancel(skb, nest); 3151 return -1; 3152} 3153 3154static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 3155{ 3156 struct fl_flow_tmplt *tmplt = tmplt_priv; 3157 struct fl_flow_key *key, *mask; 3158 struct nlattr *nest; 3159 3160 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 3161 if (!nest) 3162 goto nla_put_failure; 3163 3164 key = &tmplt->dummy_key; 3165 mask = &tmplt->mask; 3166 3167 if (fl_dump_key(skb, net, key, mask)) 3168 goto nla_put_failure; 3169 3170 nla_nest_end(skb, nest); 3171 3172 return skb->len; 3173 3174nla_put_failure: 3175 nla_nest_cancel(skb, nest); 3176 return -EMSGSIZE; 3177} 3178 3179static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 3180 unsigned long base) 3181{ 3182 struct cls_fl_filter *f = fh; 3183 3184 if (f && f->res.classid == classid) { 3185 if (cl) 3186 __tcf_bind_filter(q, &f->res, base); 3187 else 3188 __tcf_unbind_filter(q, &f->res); 3189 } 3190} 3191 3192static bool fl_delete_empty(struct tcf_proto *tp) 3193{ 3194 struct cls_fl_head *head = fl_head_dereference(tp); 3195 3196 spin_lock(&tp->lock); 3197 tp->deleting = idr_is_empty(&head->handle_idr); 3198 spin_unlock(&tp->lock); 3199 3200 return tp->deleting; 3201} 3202 3203static struct tcf_proto_ops cls_fl_ops __read_mostly = { 3204 .kind = "flower", 3205 .classify = fl_classify, 3206 .init = fl_init, 3207 .destroy = fl_destroy, 3208 .get = fl_get, 3209 .put = fl_put, 3210 .change = fl_change, 3211 .delete = fl_delete, 3212 .delete_empty = fl_delete_empty, 3213 .walk = fl_walk, 3214 .reoffload = fl_reoffload, 3215 .hw_add = fl_hw_add, 3216 .hw_del = fl_hw_del, 3217 .dump = fl_dump, 3218 .terse_dump = fl_terse_dump, 3219 .bind_class = fl_bind_class, 3220 .tmplt_create = fl_tmplt_create, 3221 .tmplt_destroy = fl_tmplt_destroy, 3222 .tmplt_dump = fl_tmplt_dump, 3223 .owner = THIS_MODULE, 3224 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 3225}; 3226 3227static int __init cls_fl_init(void) 3228{ 3229 return register_tcf_proto_ops(&cls_fl_ops); 3230} 3231 3232static void __exit cls_fl_exit(void) 3233{ 3234 unregister_tcf_proto_ops(&cls_fl_ops); 3235} 3236 3237module_init(cls_fl_init); 3238module_exit(cls_fl_exit); 3239 3240MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 3241MODULE_DESCRIPTION("Flower classifier"); 3242MODULE_LICENSE("GPL v2"); 3243