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