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