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