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 [TCA_FLOWER_FLAGS] = { .type = NLA_U32 }, 695 }; 696 697 static const struct nla_policy 698 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 699 [TCA_FLOWER_KEY_ENC_OPTS_UNSPEC] = { 700 .strict_start_type = TCA_FLOWER_KEY_ENC_OPTS_VXLAN }, 701 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 702 [TCA_FLOWER_KEY_ENC_OPTS_VXLAN] = { .type = NLA_NESTED }, 703 [TCA_FLOWER_KEY_ENC_OPTS_ERSPAN] = { .type = NLA_NESTED }, 704 }; 705 706 static const struct nla_policy 707 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 708 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 709 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 710 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 711 .len = 128 }, 712 }; 713 714 static const struct nla_policy 715 vxlan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1] = { 716 [TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP] = { .type = NLA_U32 }, 717 }; 718 719 static const struct nla_policy 720 erspan_opt_policy[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1] = { 721 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER] = { .type = NLA_U8 }, 722 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX] = { .type = NLA_U32 }, 723 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] = { .type = NLA_U8 }, 724 [TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID] = { .type = NLA_U8 }, 725 }; 726 727 static void fl_set_key_val(struct nlattr **tb, 728 void *val, int val_type, 729 void *mask, int mask_type, int len) 730 { 731 if (!tb[val_type]) 732 return; 733 nla_memcpy(val, tb[val_type], len); 734 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 735 memset(mask, 0xff, len); 736 else 737 nla_memcpy(mask, tb[mask_type], len); 738 } 739 740 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 741 struct fl_flow_key *mask) 742 { 743 fl_set_key_val(tb, &key->tp_range.tp_min.dst, 744 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_range.tp_min.dst, 745 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.dst)); 746 fl_set_key_val(tb, &key->tp_range.tp_max.dst, 747 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_range.tp_max.dst, 748 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.dst)); 749 fl_set_key_val(tb, &key->tp_range.tp_min.src, 750 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_range.tp_min.src, 751 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_min.src)); 752 fl_set_key_val(tb, &key->tp_range.tp_max.src, 753 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_range.tp_max.src, 754 TCA_FLOWER_UNSPEC, sizeof(key->tp_range.tp_max.src)); 755 756 if ((mask->tp_range.tp_min.dst && mask->tp_range.tp_max.dst && 757 htons(key->tp_range.tp_max.dst) <= 758 htons(key->tp_range.tp_min.dst)) || 759 (mask->tp_range.tp_min.src && mask->tp_range.tp_max.src && 760 htons(key->tp_range.tp_max.src) <= 761 htons(key->tp_range.tp_min.src))) 762 return -EINVAL; 763 764 return 0; 765 } 766 767 static int fl_set_key_mpls(struct nlattr **tb, 768 struct flow_dissector_key_mpls *key_val, 769 struct flow_dissector_key_mpls *key_mask) 770 { 771 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 772 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 773 key_mask->mpls_ttl = MPLS_TTL_MASK; 774 } 775 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 776 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 777 778 if (bos & ~MPLS_BOS_MASK) 779 return -EINVAL; 780 key_val->mpls_bos = bos; 781 key_mask->mpls_bos = MPLS_BOS_MASK; 782 } 783 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 784 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 785 786 if (tc & ~MPLS_TC_MASK) 787 return -EINVAL; 788 key_val->mpls_tc = tc; 789 key_mask->mpls_tc = MPLS_TC_MASK; 790 } 791 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 792 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 793 794 if (label & ~MPLS_LABEL_MASK) 795 return -EINVAL; 796 key_val->mpls_label = label; 797 key_mask->mpls_label = MPLS_LABEL_MASK; 798 } 799 return 0; 800 } 801 802 static void fl_set_key_vlan(struct nlattr **tb, 803 __be16 ethertype, 804 int vlan_id_key, int vlan_prio_key, 805 struct flow_dissector_key_vlan *key_val, 806 struct flow_dissector_key_vlan *key_mask) 807 { 808 #define VLAN_PRIORITY_MASK 0x7 809 810 if (tb[vlan_id_key]) { 811 key_val->vlan_id = 812 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 813 key_mask->vlan_id = VLAN_VID_MASK; 814 } 815 if (tb[vlan_prio_key]) { 816 key_val->vlan_priority = 817 nla_get_u8(tb[vlan_prio_key]) & 818 VLAN_PRIORITY_MASK; 819 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 820 } 821 key_val->vlan_tpid = ethertype; 822 key_mask->vlan_tpid = cpu_to_be16(~0); 823 } 824 825 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 826 u32 *dissector_key, u32 *dissector_mask, 827 u32 flower_flag_bit, u32 dissector_flag_bit) 828 { 829 if (flower_mask & flower_flag_bit) { 830 *dissector_mask |= dissector_flag_bit; 831 if (flower_key & flower_flag_bit) 832 *dissector_key |= dissector_flag_bit; 833 } 834 } 835 836 static int fl_set_key_flags(struct nlattr **tb, 837 u32 *flags_key, u32 *flags_mask) 838 { 839 u32 key, mask; 840 841 /* mask is mandatory for flags */ 842 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 843 return -EINVAL; 844 845 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 846 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 847 848 *flags_key = 0; 849 *flags_mask = 0; 850 851 fl_set_key_flag(key, mask, flags_key, flags_mask, 852 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 853 fl_set_key_flag(key, mask, flags_key, flags_mask, 854 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 855 FLOW_DIS_FIRST_FRAG); 856 857 return 0; 858 } 859 860 static void fl_set_key_ip(struct nlattr **tb, bool encap, 861 struct flow_dissector_key_ip *key, 862 struct flow_dissector_key_ip *mask) 863 { 864 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 865 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 866 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 867 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 868 869 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 870 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 871 } 872 873 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 874 int depth, int option_len, 875 struct netlink_ext_ack *extack) 876 { 877 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 878 struct nlattr *class = NULL, *type = NULL, *data = NULL; 879 struct geneve_opt *opt; 880 int err, data_len = 0; 881 882 if (option_len > sizeof(struct geneve_opt)) 883 data_len = option_len - sizeof(struct geneve_opt); 884 885 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 886 memset(opt, 0xff, option_len); 887 opt->length = data_len / 4; 888 opt->r1 = 0; 889 opt->r2 = 0; 890 opt->r3 = 0; 891 892 /* If no mask has been prodived we assume an exact match. */ 893 if (!depth) 894 return sizeof(struct geneve_opt) + data_len; 895 896 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 897 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 898 return -EINVAL; 899 } 900 901 err = nla_parse_nested_deprecated(tb, 902 TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 903 nla, geneve_opt_policy, extack); 904 if (err < 0) 905 return err; 906 907 /* We are not allowed to omit any of CLASS, TYPE or DATA 908 * fields from the key. 909 */ 910 if (!option_len && 911 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 912 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 913 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 914 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 915 return -EINVAL; 916 } 917 918 /* Omitting any of CLASS, TYPE or DATA fields is allowed 919 * for the mask. 920 */ 921 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 922 int new_len = key->enc_opts.len; 923 924 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 925 data_len = nla_len(data); 926 if (data_len < 4) { 927 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 928 return -ERANGE; 929 } 930 if (data_len % 4) { 931 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 932 return -ERANGE; 933 } 934 935 new_len += sizeof(struct geneve_opt) + data_len; 936 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 937 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 938 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 939 return -ERANGE; 940 } 941 opt->length = data_len / 4; 942 memcpy(opt->opt_data, nla_data(data), data_len); 943 } 944 945 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 946 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 947 opt->opt_class = nla_get_be16(class); 948 } 949 950 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 951 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 952 opt->type = nla_get_u8(type); 953 } 954 955 return sizeof(struct geneve_opt) + data_len; 956 } 957 958 static int fl_set_vxlan_opt(const struct nlattr *nla, struct fl_flow_key *key, 959 int depth, int option_len, 960 struct netlink_ext_ack *extack) 961 { 962 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX + 1]; 963 struct vxlan_metadata *md; 964 int err; 965 966 md = (struct vxlan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 967 memset(md, 0xff, sizeof(*md)); 968 969 if (!depth) 970 return sizeof(*md); 971 972 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_VXLAN) { 973 NL_SET_ERR_MSG(extack, "Non-vxlan option type for mask"); 974 return -EINVAL; 975 } 976 977 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX, nla, 978 vxlan_opt_policy, extack); 979 if (err < 0) 980 return err; 981 982 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) { 983 NL_SET_ERR_MSG(extack, "Missing tunnel key vxlan option gbp"); 984 return -EINVAL; 985 } 986 987 if (tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]) 988 md->gbp = nla_get_u32(tb[TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP]); 989 990 return sizeof(*md); 991 } 992 993 static int fl_set_erspan_opt(const struct nlattr *nla, struct fl_flow_key *key, 994 int depth, int option_len, 995 struct netlink_ext_ack *extack) 996 { 997 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX + 1]; 998 struct erspan_metadata *md; 999 int err; 1000 1001 md = (struct erspan_metadata *)&key->enc_opts.data[key->enc_opts.len]; 1002 memset(md, 0xff, sizeof(*md)); 1003 md->version = 1; 1004 1005 if (!depth) 1006 return sizeof(*md); 1007 1008 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_ERSPAN) { 1009 NL_SET_ERR_MSG(extack, "Non-erspan option type for mask"); 1010 return -EINVAL; 1011 } 1012 1013 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_MAX, nla, 1014 erspan_opt_policy, extack); 1015 if (err < 0) 1016 return err; 1017 1018 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) { 1019 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option ver"); 1020 return -EINVAL; 1021 } 1022 1023 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]) 1024 md->version = nla_get_u8(tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER]); 1025 1026 if (md->version == 1) { 1027 if (!option_len && !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1028 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option index"); 1029 return -EINVAL; 1030 } 1031 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]) { 1032 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX]; 1033 md->u.index = nla_get_be32(nla); 1034 } 1035 } else if (md->version == 2) { 1036 if (!option_len && (!tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR] || 1037 !tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID])) { 1038 NL_SET_ERR_MSG(extack, "Missing tunnel key erspan option dir or hwid"); 1039 return -EINVAL; 1040 } 1041 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]) { 1042 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR]; 1043 md->u.md2.dir = nla_get_u8(nla); 1044 } 1045 if (tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]) { 1046 nla = tb[TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID]; 1047 set_hwid(&md->u.md2, nla_get_u8(nla)); 1048 } 1049 } else { 1050 NL_SET_ERR_MSG(extack, "Tunnel key erspan option ver is incorrect"); 1051 return -EINVAL; 1052 } 1053 1054 return sizeof(*md); 1055 } 1056 1057 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 1058 struct fl_flow_key *mask, 1059 struct netlink_ext_ack *extack) 1060 { 1061 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 1062 int err, option_len, key_depth, msk_depth = 0; 1063 1064 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS], 1065 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1066 enc_opts_policy, extack); 1067 if (err) 1068 return err; 1069 1070 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 1071 1072 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 1073 err = nla_validate_nested_deprecated(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 1074 TCA_FLOWER_KEY_ENC_OPTS_MAX, 1075 enc_opts_policy, extack); 1076 if (err) 1077 return err; 1078 1079 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1080 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 1081 } 1082 1083 nla_for_each_attr(nla_opt_key, nla_enc_key, 1084 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 1085 switch (nla_type(nla_opt_key)) { 1086 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 1087 if (key->enc_opts.dst_opt_type && 1088 key->enc_opts.dst_opt_type != TUNNEL_GENEVE_OPT) { 1089 NL_SET_ERR_MSG(extack, "Duplicate type for geneve options"); 1090 return -EINVAL; 1091 } 1092 option_len = 0; 1093 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1094 option_len = fl_set_geneve_opt(nla_opt_key, key, 1095 key_depth, option_len, 1096 extack); 1097 if (option_len < 0) 1098 return option_len; 1099 1100 key->enc_opts.len += option_len; 1101 /* At the same time we need to parse through the mask 1102 * in order to verify exact and mask attribute lengths. 1103 */ 1104 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 1105 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 1106 msk_depth, option_len, 1107 extack); 1108 if (option_len < 0) 1109 return option_len; 1110 1111 mask->enc_opts.len += option_len; 1112 if (key->enc_opts.len != mask->enc_opts.len) { 1113 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1114 return -EINVAL; 1115 } 1116 1117 if (msk_depth) 1118 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1119 break; 1120 case TCA_FLOWER_KEY_ENC_OPTS_VXLAN: 1121 if (key->enc_opts.dst_opt_type) { 1122 NL_SET_ERR_MSG(extack, "Duplicate type for vxlan options"); 1123 return -EINVAL; 1124 } 1125 option_len = 0; 1126 key->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1127 option_len = fl_set_vxlan_opt(nla_opt_key, key, 1128 key_depth, option_len, 1129 extack); 1130 if (option_len < 0) 1131 return option_len; 1132 1133 key->enc_opts.len += option_len; 1134 /* At the same time we need to parse through the mask 1135 * in order to verify exact and mask attribute lengths. 1136 */ 1137 mask->enc_opts.dst_opt_type = TUNNEL_VXLAN_OPT; 1138 option_len = fl_set_vxlan_opt(nla_opt_msk, mask, 1139 msk_depth, option_len, 1140 extack); 1141 if (option_len < 0) 1142 return option_len; 1143 1144 mask->enc_opts.len += option_len; 1145 if (key->enc_opts.len != mask->enc_opts.len) { 1146 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1147 return -EINVAL; 1148 } 1149 1150 if (msk_depth) 1151 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1152 break; 1153 case TCA_FLOWER_KEY_ENC_OPTS_ERSPAN: 1154 if (key->enc_opts.dst_opt_type) { 1155 NL_SET_ERR_MSG(extack, "Duplicate type for erspan options"); 1156 return -EINVAL; 1157 } 1158 option_len = 0; 1159 key->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1160 option_len = fl_set_erspan_opt(nla_opt_key, key, 1161 key_depth, option_len, 1162 extack); 1163 if (option_len < 0) 1164 return option_len; 1165 1166 key->enc_opts.len += option_len; 1167 /* At the same time we need to parse through the mask 1168 * in order to verify exact and mask attribute lengths. 1169 */ 1170 mask->enc_opts.dst_opt_type = TUNNEL_ERSPAN_OPT; 1171 option_len = fl_set_erspan_opt(nla_opt_msk, mask, 1172 msk_depth, option_len, 1173 extack); 1174 if (option_len < 0) 1175 return option_len; 1176 1177 mask->enc_opts.len += option_len; 1178 if (key->enc_opts.len != mask->enc_opts.len) { 1179 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 1180 return -EINVAL; 1181 } 1182 1183 if (msk_depth) 1184 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 1185 break; 1186 default: 1187 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 1188 return -EINVAL; 1189 } 1190 } 1191 1192 return 0; 1193 } 1194 1195 static int fl_set_key_ct(struct nlattr **tb, 1196 struct flow_dissector_key_ct *key, 1197 struct flow_dissector_key_ct *mask, 1198 struct netlink_ext_ack *extack) 1199 { 1200 if (tb[TCA_FLOWER_KEY_CT_STATE]) { 1201 if (!IS_ENABLED(CONFIG_NF_CONNTRACK)) { 1202 NL_SET_ERR_MSG(extack, "Conntrack isn't enabled"); 1203 return -EOPNOTSUPP; 1204 } 1205 fl_set_key_val(tb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 1206 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 1207 sizeof(key->ct_state)); 1208 } 1209 if (tb[TCA_FLOWER_KEY_CT_ZONE]) { 1210 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) { 1211 NL_SET_ERR_MSG(extack, "Conntrack zones isn't enabled"); 1212 return -EOPNOTSUPP; 1213 } 1214 fl_set_key_val(tb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 1215 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 1216 sizeof(key->ct_zone)); 1217 } 1218 if (tb[TCA_FLOWER_KEY_CT_MARK]) { 1219 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) { 1220 NL_SET_ERR_MSG(extack, "Conntrack mark isn't enabled"); 1221 return -EOPNOTSUPP; 1222 } 1223 fl_set_key_val(tb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 1224 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 1225 sizeof(key->ct_mark)); 1226 } 1227 if (tb[TCA_FLOWER_KEY_CT_LABELS]) { 1228 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) { 1229 NL_SET_ERR_MSG(extack, "Conntrack labels aren't enabled"); 1230 return -EOPNOTSUPP; 1231 } 1232 fl_set_key_val(tb, key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 1233 mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 1234 sizeof(key->ct_labels)); 1235 } 1236 1237 return 0; 1238 } 1239 1240 static int fl_set_key(struct net *net, struct nlattr **tb, 1241 struct fl_flow_key *key, struct fl_flow_key *mask, 1242 struct netlink_ext_ack *extack) 1243 { 1244 __be16 ethertype; 1245 int ret = 0; 1246 1247 if (tb[TCA_FLOWER_INDEV]) { 1248 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 1249 if (err < 0) 1250 return err; 1251 key->meta.ingress_ifindex = err; 1252 mask->meta.ingress_ifindex = 0xffffffff; 1253 } 1254 1255 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1256 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1257 sizeof(key->eth.dst)); 1258 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1259 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1260 sizeof(key->eth.src)); 1261 1262 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 1263 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 1264 1265 if (eth_type_vlan(ethertype)) { 1266 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 1267 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 1268 &mask->vlan); 1269 1270 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 1271 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 1272 if (eth_type_vlan(ethertype)) { 1273 fl_set_key_vlan(tb, ethertype, 1274 TCA_FLOWER_KEY_CVLAN_ID, 1275 TCA_FLOWER_KEY_CVLAN_PRIO, 1276 &key->cvlan, &mask->cvlan); 1277 fl_set_key_val(tb, &key->basic.n_proto, 1278 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1279 &mask->basic.n_proto, 1280 TCA_FLOWER_UNSPEC, 1281 sizeof(key->basic.n_proto)); 1282 } else { 1283 key->basic.n_proto = ethertype; 1284 mask->basic.n_proto = cpu_to_be16(~0); 1285 } 1286 } 1287 } else { 1288 key->basic.n_proto = ethertype; 1289 mask->basic.n_proto = cpu_to_be16(~0); 1290 } 1291 } 1292 1293 if (key->basic.n_proto == htons(ETH_P_IP) || 1294 key->basic.n_proto == htons(ETH_P_IPV6)) { 1295 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1296 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1297 sizeof(key->basic.ip_proto)); 1298 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 1299 } 1300 1301 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 1302 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1303 mask->control.addr_type = ~0; 1304 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1305 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1306 sizeof(key->ipv4.src)); 1307 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1308 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1309 sizeof(key->ipv4.dst)); 1310 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 1311 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1312 mask->control.addr_type = ~0; 1313 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1314 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1315 sizeof(key->ipv6.src)); 1316 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1317 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1318 sizeof(key->ipv6.dst)); 1319 } 1320 1321 if (key->basic.ip_proto == IPPROTO_TCP) { 1322 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1323 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1324 sizeof(key->tp.src)); 1325 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1326 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1327 sizeof(key->tp.dst)); 1328 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1329 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1330 sizeof(key->tcp.flags)); 1331 } else if (key->basic.ip_proto == IPPROTO_UDP) { 1332 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1333 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1334 sizeof(key->tp.src)); 1335 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1336 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1337 sizeof(key->tp.dst)); 1338 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 1339 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1340 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1341 sizeof(key->tp.src)); 1342 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1343 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1344 sizeof(key->tp.dst)); 1345 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1346 key->basic.ip_proto == IPPROTO_ICMP) { 1347 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1348 &mask->icmp.type, 1349 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1350 sizeof(key->icmp.type)); 1351 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1352 &mask->icmp.code, 1353 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1354 sizeof(key->icmp.code)); 1355 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1356 key->basic.ip_proto == IPPROTO_ICMPV6) { 1357 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1358 &mask->icmp.type, 1359 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1360 sizeof(key->icmp.type)); 1361 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1362 &mask->icmp.code, 1363 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1364 sizeof(key->icmp.code)); 1365 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1366 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1367 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 1368 if (ret) 1369 return ret; 1370 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1371 key->basic.n_proto == htons(ETH_P_RARP)) { 1372 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1373 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1374 sizeof(key->arp.sip)); 1375 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1376 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1377 sizeof(key->arp.tip)); 1378 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1379 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1380 sizeof(key->arp.op)); 1381 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1382 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1383 sizeof(key->arp.sha)); 1384 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1385 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1386 sizeof(key->arp.tha)); 1387 } 1388 1389 if (key->basic.ip_proto == IPPROTO_TCP || 1390 key->basic.ip_proto == IPPROTO_UDP || 1391 key->basic.ip_proto == IPPROTO_SCTP) { 1392 ret = fl_set_key_port_range(tb, key, mask); 1393 if (ret) 1394 return ret; 1395 } 1396 1397 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1398 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1399 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1400 mask->enc_control.addr_type = ~0; 1401 fl_set_key_val(tb, &key->enc_ipv4.src, 1402 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1403 &mask->enc_ipv4.src, 1404 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1405 sizeof(key->enc_ipv4.src)); 1406 fl_set_key_val(tb, &key->enc_ipv4.dst, 1407 TCA_FLOWER_KEY_ENC_IPV4_DST, 1408 &mask->enc_ipv4.dst, 1409 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1410 sizeof(key->enc_ipv4.dst)); 1411 } 1412 1413 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1414 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1415 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1416 mask->enc_control.addr_type = ~0; 1417 fl_set_key_val(tb, &key->enc_ipv6.src, 1418 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1419 &mask->enc_ipv6.src, 1420 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1421 sizeof(key->enc_ipv6.src)); 1422 fl_set_key_val(tb, &key->enc_ipv6.dst, 1423 TCA_FLOWER_KEY_ENC_IPV6_DST, 1424 &mask->enc_ipv6.dst, 1425 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1426 sizeof(key->enc_ipv6.dst)); 1427 } 1428 1429 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1430 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1431 sizeof(key->enc_key_id.keyid)); 1432 1433 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1434 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1435 sizeof(key->enc_tp.src)); 1436 1437 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1438 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1439 sizeof(key->enc_tp.dst)); 1440 1441 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1442 1443 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1444 ret = fl_set_enc_opt(tb, key, mask, extack); 1445 if (ret) 1446 return ret; 1447 } 1448 1449 ret = fl_set_key_ct(tb, &key->ct, &mask->ct, extack); 1450 if (ret) 1451 return ret; 1452 1453 if (tb[TCA_FLOWER_KEY_FLAGS]) 1454 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 1455 1456 return ret; 1457 } 1458 1459 static void fl_mask_copy(struct fl_flow_mask *dst, 1460 struct fl_flow_mask *src) 1461 { 1462 const void *psrc = fl_key_get_start(&src->key, src); 1463 void *pdst = fl_key_get_start(&dst->key, src); 1464 1465 memcpy(pdst, psrc, fl_mask_range(src)); 1466 dst->range = src->range; 1467 } 1468 1469 static const struct rhashtable_params fl_ht_params = { 1470 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1471 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1472 .automatic_shrinking = true, 1473 }; 1474 1475 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1476 { 1477 mask->filter_ht_params = fl_ht_params; 1478 mask->filter_ht_params.key_len = fl_mask_range(mask); 1479 mask->filter_ht_params.key_offset += mask->range.start; 1480 1481 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1482 } 1483 1484 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1485 #define FL_KEY_MEMBER_SIZE(member) sizeof_field(struct fl_flow_key, member) 1486 1487 #define FL_KEY_IS_MASKED(mask, member) \ 1488 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1489 0, FL_KEY_MEMBER_SIZE(member)) \ 1490 1491 #define FL_KEY_SET(keys, cnt, id, member) \ 1492 do { \ 1493 keys[cnt].key_id = id; \ 1494 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1495 cnt++; \ 1496 } while(0); 1497 1498 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1499 do { \ 1500 if (FL_KEY_IS_MASKED(mask, member)) \ 1501 FL_KEY_SET(keys, cnt, id, member); \ 1502 } while(0); 1503 1504 static void fl_init_dissector(struct flow_dissector *dissector, 1505 struct fl_flow_key *mask) 1506 { 1507 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1508 size_t cnt = 0; 1509 1510 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1511 FLOW_DISSECTOR_KEY_META, meta); 1512 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1513 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1514 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1515 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1516 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1517 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1518 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1519 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1520 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1521 FLOW_DISSECTOR_KEY_PORTS, tp); 1522 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1523 FLOW_DISSECTOR_KEY_PORTS_RANGE, tp_range); 1524 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1525 FLOW_DISSECTOR_KEY_IP, ip); 1526 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1527 FLOW_DISSECTOR_KEY_TCP, tcp); 1528 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1529 FLOW_DISSECTOR_KEY_ICMP, icmp); 1530 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1531 FLOW_DISSECTOR_KEY_ARP, arp); 1532 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1533 FLOW_DISSECTOR_KEY_MPLS, mpls); 1534 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1535 FLOW_DISSECTOR_KEY_VLAN, vlan); 1536 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1537 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1538 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1539 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1540 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1541 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1542 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1543 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1544 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1545 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1546 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1547 enc_control); 1548 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1549 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1550 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1551 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1552 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1553 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1554 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1555 FLOW_DISSECTOR_KEY_CT, ct); 1556 1557 skb_flow_dissector_init(dissector, keys, cnt); 1558 } 1559 1560 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1561 struct fl_flow_mask *mask) 1562 { 1563 struct fl_flow_mask *newmask; 1564 int err; 1565 1566 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1567 if (!newmask) 1568 return ERR_PTR(-ENOMEM); 1569 1570 fl_mask_copy(newmask, mask); 1571 1572 if ((newmask->key.tp_range.tp_min.dst && 1573 newmask->key.tp_range.tp_max.dst) || 1574 (newmask->key.tp_range.tp_min.src && 1575 newmask->key.tp_range.tp_max.src)) 1576 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1577 1578 err = fl_init_mask_hashtable(newmask); 1579 if (err) 1580 goto errout_free; 1581 1582 fl_init_dissector(&newmask->dissector, &newmask->key); 1583 1584 INIT_LIST_HEAD_RCU(&newmask->filters); 1585 1586 refcount_set(&newmask->refcnt, 1); 1587 err = rhashtable_replace_fast(&head->ht, &mask->ht_node, 1588 &newmask->ht_node, mask_ht_params); 1589 if (err) 1590 goto errout_destroy; 1591 1592 spin_lock(&head->masks_lock); 1593 list_add_tail_rcu(&newmask->list, &head->masks); 1594 spin_unlock(&head->masks_lock); 1595 1596 return newmask; 1597 1598 errout_destroy: 1599 rhashtable_destroy(&newmask->ht); 1600 errout_free: 1601 kfree(newmask); 1602 1603 return ERR_PTR(err); 1604 } 1605 1606 static int fl_check_assign_mask(struct cls_fl_head *head, 1607 struct cls_fl_filter *fnew, 1608 struct cls_fl_filter *fold, 1609 struct fl_flow_mask *mask) 1610 { 1611 struct fl_flow_mask *newmask; 1612 int ret = 0; 1613 1614 rcu_read_lock(); 1615 1616 /* Insert mask as temporary node to prevent concurrent creation of mask 1617 * with same key. Any concurrent lookups with same key will return 1618 * -EAGAIN because mask's refcnt is zero. 1619 */ 1620 fnew->mask = rhashtable_lookup_get_insert_fast(&head->ht, 1621 &mask->ht_node, 1622 mask_ht_params); 1623 if (!fnew->mask) { 1624 rcu_read_unlock(); 1625 1626 if (fold) { 1627 ret = -EINVAL; 1628 goto errout_cleanup; 1629 } 1630 1631 newmask = fl_create_new_mask(head, mask); 1632 if (IS_ERR(newmask)) { 1633 ret = PTR_ERR(newmask); 1634 goto errout_cleanup; 1635 } 1636 1637 fnew->mask = newmask; 1638 return 0; 1639 } else if (IS_ERR(fnew->mask)) { 1640 ret = PTR_ERR(fnew->mask); 1641 } else if (fold && fold->mask != fnew->mask) { 1642 ret = -EINVAL; 1643 } else if (!refcount_inc_not_zero(&fnew->mask->refcnt)) { 1644 /* Mask was deleted concurrently, try again */ 1645 ret = -EAGAIN; 1646 } 1647 rcu_read_unlock(); 1648 return ret; 1649 1650 errout_cleanup: 1651 rhashtable_remove_fast(&head->ht, &mask->ht_node, 1652 mask_ht_params); 1653 return ret; 1654 } 1655 1656 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1657 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1658 unsigned long base, struct nlattr **tb, 1659 struct nlattr *est, bool ovr, 1660 struct fl_flow_tmplt *tmplt, bool rtnl_held, 1661 struct netlink_ext_ack *extack) 1662 { 1663 int err; 1664 1665 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, rtnl_held, 1666 extack); 1667 if (err < 0) 1668 return err; 1669 1670 if (tb[TCA_FLOWER_CLASSID]) { 1671 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1672 if (!rtnl_held) 1673 rtnl_lock(); 1674 tcf_bind_filter(tp, &f->res, base); 1675 if (!rtnl_held) 1676 rtnl_unlock(); 1677 } 1678 1679 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1680 if (err) 1681 return err; 1682 1683 fl_mask_update_range(mask); 1684 fl_set_masked_key(&f->mkey, &f->key, mask); 1685 1686 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1687 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1688 return -EINVAL; 1689 } 1690 1691 return 0; 1692 } 1693 1694 static int fl_ht_insert_unique(struct cls_fl_filter *fnew, 1695 struct cls_fl_filter *fold, 1696 bool *in_ht) 1697 { 1698 struct fl_flow_mask *mask = fnew->mask; 1699 int err; 1700 1701 err = rhashtable_lookup_insert_fast(&mask->ht, 1702 &fnew->ht_node, 1703 mask->filter_ht_params); 1704 if (err) { 1705 *in_ht = false; 1706 /* It is okay if filter with same key exists when 1707 * overwriting. 1708 */ 1709 return fold && err == -EEXIST ? 0 : err; 1710 } 1711 1712 *in_ht = true; 1713 return 0; 1714 } 1715 1716 static int fl_change(struct net *net, struct sk_buff *in_skb, 1717 struct tcf_proto *tp, unsigned long base, 1718 u32 handle, struct nlattr **tca, 1719 void **arg, bool ovr, bool rtnl_held, 1720 struct netlink_ext_ack *extack) 1721 { 1722 struct cls_fl_head *head = fl_head_dereference(tp); 1723 struct cls_fl_filter *fold = *arg; 1724 struct cls_fl_filter *fnew; 1725 struct fl_flow_mask *mask; 1726 struct nlattr **tb; 1727 bool in_ht; 1728 int err; 1729 1730 if (!tca[TCA_OPTIONS]) { 1731 err = -EINVAL; 1732 goto errout_fold; 1733 } 1734 1735 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1736 if (!mask) { 1737 err = -ENOBUFS; 1738 goto errout_fold; 1739 } 1740 1741 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1742 if (!tb) { 1743 err = -ENOBUFS; 1744 goto errout_mask_alloc; 1745 } 1746 1747 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 1748 tca[TCA_OPTIONS], fl_policy, NULL); 1749 if (err < 0) 1750 goto errout_tb; 1751 1752 if (fold && handle && fold->handle != handle) { 1753 err = -EINVAL; 1754 goto errout_tb; 1755 } 1756 1757 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1758 if (!fnew) { 1759 err = -ENOBUFS; 1760 goto errout_tb; 1761 } 1762 INIT_LIST_HEAD(&fnew->hw_list); 1763 refcount_set(&fnew->refcnt, 1); 1764 1765 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 1766 if (err < 0) 1767 goto errout; 1768 1769 if (tb[TCA_FLOWER_FLAGS]) { 1770 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1771 1772 if (!tc_flags_valid(fnew->flags)) { 1773 err = -EINVAL; 1774 goto errout; 1775 } 1776 } 1777 1778 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 1779 tp->chain->tmplt_priv, rtnl_held, extack); 1780 if (err) 1781 goto errout; 1782 1783 err = fl_check_assign_mask(head, fnew, fold, mask); 1784 if (err) 1785 goto errout; 1786 1787 err = fl_ht_insert_unique(fnew, fold, &in_ht); 1788 if (err) 1789 goto errout_mask; 1790 1791 if (!tc_skip_hw(fnew->flags)) { 1792 err = fl_hw_replace_filter(tp, fnew, rtnl_held, extack); 1793 if (err) 1794 goto errout_ht; 1795 } 1796 1797 if (!tc_in_hw(fnew->flags)) 1798 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1799 1800 spin_lock(&tp->lock); 1801 1802 /* tp was deleted concurrently. -EAGAIN will cause caller to lookup 1803 * proto again or create new one, if necessary. 1804 */ 1805 if (tp->deleting) { 1806 err = -EAGAIN; 1807 goto errout_hw; 1808 } 1809 1810 if (fold) { 1811 /* Fold filter was deleted concurrently. Retry lookup. */ 1812 if (fold->deleted) { 1813 err = -EAGAIN; 1814 goto errout_hw; 1815 } 1816 1817 fnew->handle = handle; 1818 1819 if (!in_ht) { 1820 struct rhashtable_params params = 1821 fnew->mask->filter_ht_params; 1822 1823 err = rhashtable_insert_fast(&fnew->mask->ht, 1824 &fnew->ht_node, 1825 params); 1826 if (err) 1827 goto errout_hw; 1828 in_ht = true; 1829 } 1830 1831 refcount_inc(&fnew->refcnt); 1832 rhashtable_remove_fast(&fold->mask->ht, 1833 &fold->ht_node, 1834 fold->mask->filter_ht_params); 1835 idr_replace(&head->handle_idr, fnew, fnew->handle); 1836 list_replace_rcu(&fold->list, &fnew->list); 1837 fold->deleted = true; 1838 1839 spin_unlock(&tp->lock); 1840 1841 fl_mask_put(head, fold->mask); 1842 if (!tc_skip_hw(fold->flags)) 1843 fl_hw_destroy_filter(tp, fold, rtnl_held, NULL); 1844 tcf_unbind_filter(tp, &fold->res); 1845 /* Caller holds reference to fold, so refcnt is always > 0 1846 * after this. 1847 */ 1848 refcount_dec(&fold->refcnt); 1849 __fl_put(fold); 1850 } else { 1851 if (handle) { 1852 /* user specifies a handle and it doesn't exist */ 1853 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1854 handle, GFP_ATOMIC); 1855 1856 /* Filter with specified handle was concurrently 1857 * inserted after initial check in cls_api. This is not 1858 * necessarily an error if NLM_F_EXCL is not set in 1859 * message flags. Returning EAGAIN will cause cls_api to 1860 * try to update concurrently inserted rule. 1861 */ 1862 if (err == -ENOSPC) 1863 err = -EAGAIN; 1864 } else { 1865 handle = 1; 1866 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1867 INT_MAX, GFP_ATOMIC); 1868 } 1869 if (err) 1870 goto errout_hw; 1871 1872 refcount_inc(&fnew->refcnt); 1873 fnew->handle = handle; 1874 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1875 spin_unlock(&tp->lock); 1876 } 1877 1878 *arg = fnew; 1879 1880 kfree(tb); 1881 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 1882 return 0; 1883 1884 errout_ht: 1885 spin_lock(&tp->lock); 1886 errout_hw: 1887 fnew->deleted = true; 1888 spin_unlock(&tp->lock); 1889 if (!tc_skip_hw(fnew->flags)) 1890 fl_hw_destroy_filter(tp, fnew, rtnl_held, NULL); 1891 if (in_ht) 1892 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 1893 fnew->mask->filter_ht_params); 1894 errout_mask: 1895 fl_mask_put(head, fnew->mask); 1896 errout: 1897 __fl_put(fnew); 1898 errout_tb: 1899 kfree(tb); 1900 errout_mask_alloc: 1901 tcf_queue_work(&mask->rwork, fl_uninit_mask_free_work); 1902 errout_fold: 1903 if (fold) 1904 __fl_put(fold); 1905 return err; 1906 } 1907 1908 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1909 bool rtnl_held, struct netlink_ext_ack *extack) 1910 { 1911 struct cls_fl_head *head = fl_head_dereference(tp); 1912 struct cls_fl_filter *f = arg; 1913 bool last_on_mask; 1914 int err = 0; 1915 1916 err = __fl_delete(tp, f, &last_on_mask, rtnl_held, extack); 1917 *last = list_empty(&head->masks); 1918 __fl_put(f); 1919 1920 return err; 1921 } 1922 1923 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 1924 bool rtnl_held) 1925 { 1926 struct cls_fl_head *head = fl_head_dereference(tp); 1927 unsigned long id = arg->cookie, tmp; 1928 struct cls_fl_filter *f; 1929 1930 arg->count = arg->skip; 1931 1932 idr_for_each_entry_continue_ul(&head->handle_idr, f, tmp, id) { 1933 /* don't return filters that are being deleted */ 1934 if (!refcount_inc_not_zero(&f->refcnt)) 1935 continue; 1936 if (arg->fn(tp, f, arg) < 0) { 1937 __fl_put(f); 1938 arg->stop = 1; 1939 break; 1940 } 1941 __fl_put(f); 1942 arg->count++; 1943 } 1944 arg->cookie = id; 1945 } 1946 1947 static struct cls_fl_filter * 1948 fl_get_next_hw_filter(struct tcf_proto *tp, struct cls_fl_filter *f, bool add) 1949 { 1950 struct cls_fl_head *head = fl_head_dereference(tp); 1951 1952 spin_lock(&tp->lock); 1953 if (list_empty(&head->hw_filters)) { 1954 spin_unlock(&tp->lock); 1955 return NULL; 1956 } 1957 1958 if (!f) 1959 f = list_entry(&head->hw_filters, struct cls_fl_filter, 1960 hw_list); 1961 list_for_each_entry_continue(f, &head->hw_filters, hw_list) { 1962 if (!(add && f->deleted) && refcount_inc_not_zero(&f->refcnt)) { 1963 spin_unlock(&tp->lock); 1964 return f; 1965 } 1966 } 1967 1968 spin_unlock(&tp->lock); 1969 return NULL; 1970 } 1971 1972 static int fl_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb, 1973 void *cb_priv, struct netlink_ext_ack *extack) 1974 { 1975 struct tcf_block *block = tp->chain->block; 1976 struct flow_cls_offload cls_flower = {}; 1977 struct cls_fl_filter *f = NULL; 1978 int err; 1979 1980 /* hw_filters list can only be changed by hw offload functions after 1981 * obtaining rtnl lock. Make sure it is not changed while reoffload is 1982 * iterating it. 1983 */ 1984 ASSERT_RTNL(); 1985 1986 while ((f = fl_get_next_hw_filter(tp, f, add))) { 1987 cls_flower.rule = 1988 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 1989 if (!cls_flower.rule) { 1990 __fl_put(f); 1991 return -ENOMEM; 1992 } 1993 1994 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, 1995 extack); 1996 cls_flower.command = add ? 1997 FLOW_CLS_REPLACE : FLOW_CLS_DESTROY; 1998 cls_flower.cookie = (unsigned long)f; 1999 cls_flower.rule->match.dissector = &f->mask->dissector; 2000 cls_flower.rule->match.mask = &f->mask->key; 2001 cls_flower.rule->match.key = &f->mkey; 2002 2003 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts, 2004 true); 2005 if (err) { 2006 kfree(cls_flower.rule); 2007 if (tc_skip_sw(f->flags)) { 2008 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 2009 __fl_put(f); 2010 return err; 2011 } 2012 goto next_flow; 2013 } 2014 2015 cls_flower.classid = f->res.classid; 2016 2017 err = tc_setup_cb_reoffload(block, tp, add, cb, 2018 TC_SETUP_CLSFLOWER, &cls_flower, 2019 cb_priv, &f->flags, 2020 &f->in_hw_count); 2021 tc_cleanup_flow_action(&cls_flower.rule->action); 2022 kfree(cls_flower.rule); 2023 2024 if (err) { 2025 __fl_put(f); 2026 return err; 2027 } 2028 next_flow: 2029 __fl_put(f); 2030 } 2031 2032 return 0; 2033 } 2034 2035 static void fl_hw_add(struct tcf_proto *tp, void *type_data) 2036 { 2037 struct flow_cls_offload *cls_flower = type_data; 2038 struct cls_fl_filter *f = 2039 (struct cls_fl_filter *) cls_flower->cookie; 2040 struct cls_fl_head *head = fl_head_dereference(tp); 2041 2042 spin_lock(&tp->lock); 2043 list_add(&f->hw_list, &head->hw_filters); 2044 spin_unlock(&tp->lock); 2045 } 2046 2047 static void fl_hw_del(struct tcf_proto *tp, void *type_data) 2048 { 2049 struct flow_cls_offload *cls_flower = type_data; 2050 struct cls_fl_filter *f = 2051 (struct cls_fl_filter *) cls_flower->cookie; 2052 2053 spin_lock(&tp->lock); 2054 if (!list_empty(&f->hw_list)) 2055 list_del_init(&f->hw_list); 2056 spin_unlock(&tp->lock); 2057 } 2058 2059 static int fl_hw_create_tmplt(struct tcf_chain *chain, 2060 struct fl_flow_tmplt *tmplt) 2061 { 2062 struct flow_cls_offload cls_flower = {}; 2063 struct tcf_block *block = chain->block; 2064 2065 cls_flower.rule = flow_rule_alloc(0); 2066 if (!cls_flower.rule) 2067 return -ENOMEM; 2068 2069 cls_flower.common.chain_index = chain->index; 2070 cls_flower.command = FLOW_CLS_TMPLT_CREATE; 2071 cls_flower.cookie = (unsigned long) tmplt; 2072 cls_flower.rule->match.dissector = &tmplt->dissector; 2073 cls_flower.rule->match.mask = &tmplt->mask; 2074 cls_flower.rule->match.key = &tmplt->dummy_key; 2075 2076 /* We don't care if driver (any of them) fails to handle this 2077 * call. It serves just as a hint for it. 2078 */ 2079 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2080 kfree(cls_flower.rule); 2081 2082 return 0; 2083 } 2084 2085 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 2086 struct fl_flow_tmplt *tmplt) 2087 { 2088 struct flow_cls_offload cls_flower = {}; 2089 struct tcf_block *block = chain->block; 2090 2091 cls_flower.common.chain_index = chain->index; 2092 cls_flower.command = FLOW_CLS_TMPLT_DESTROY; 2093 cls_flower.cookie = (unsigned long) tmplt; 2094 2095 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false, true); 2096 } 2097 2098 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 2099 struct nlattr **tca, 2100 struct netlink_ext_ack *extack) 2101 { 2102 struct fl_flow_tmplt *tmplt; 2103 struct nlattr **tb; 2104 int err; 2105 2106 if (!tca[TCA_OPTIONS]) 2107 return ERR_PTR(-EINVAL); 2108 2109 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 2110 if (!tb) 2111 return ERR_PTR(-ENOBUFS); 2112 err = nla_parse_nested_deprecated(tb, TCA_FLOWER_MAX, 2113 tca[TCA_OPTIONS], fl_policy, NULL); 2114 if (err) 2115 goto errout_tb; 2116 2117 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 2118 if (!tmplt) { 2119 err = -ENOMEM; 2120 goto errout_tb; 2121 } 2122 tmplt->chain = chain; 2123 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 2124 if (err) 2125 goto errout_tmplt; 2126 2127 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 2128 2129 err = fl_hw_create_tmplt(chain, tmplt); 2130 if (err) 2131 goto errout_tmplt; 2132 2133 kfree(tb); 2134 return tmplt; 2135 2136 errout_tmplt: 2137 kfree(tmplt); 2138 errout_tb: 2139 kfree(tb); 2140 return ERR_PTR(err); 2141 } 2142 2143 static void fl_tmplt_destroy(void *tmplt_priv) 2144 { 2145 struct fl_flow_tmplt *tmplt = tmplt_priv; 2146 2147 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 2148 kfree(tmplt); 2149 } 2150 2151 static int fl_dump_key_val(struct sk_buff *skb, 2152 void *val, int val_type, 2153 void *mask, int mask_type, int len) 2154 { 2155 int err; 2156 2157 if (!memchr_inv(mask, 0, len)) 2158 return 0; 2159 err = nla_put(skb, val_type, len, val); 2160 if (err) 2161 return err; 2162 if (mask_type != TCA_FLOWER_UNSPEC) { 2163 err = nla_put(skb, mask_type, len, mask); 2164 if (err) 2165 return err; 2166 } 2167 return 0; 2168 } 2169 2170 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 2171 struct fl_flow_key *mask) 2172 { 2173 if (fl_dump_key_val(skb, &key->tp_range.tp_min.dst, 2174 TCA_FLOWER_KEY_PORT_DST_MIN, 2175 &mask->tp_range.tp_min.dst, TCA_FLOWER_UNSPEC, 2176 sizeof(key->tp_range.tp_min.dst)) || 2177 fl_dump_key_val(skb, &key->tp_range.tp_max.dst, 2178 TCA_FLOWER_KEY_PORT_DST_MAX, 2179 &mask->tp_range.tp_max.dst, TCA_FLOWER_UNSPEC, 2180 sizeof(key->tp_range.tp_max.dst)) || 2181 fl_dump_key_val(skb, &key->tp_range.tp_min.src, 2182 TCA_FLOWER_KEY_PORT_SRC_MIN, 2183 &mask->tp_range.tp_min.src, TCA_FLOWER_UNSPEC, 2184 sizeof(key->tp_range.tp_min.src)) || 2185 fl_dump_key_val(skb, &key->tp_range.tp_max.src, 2186 TCA_FLOWER_KEY_PORT_SRC_MAX, 2187 &mask->tp_range.tp_max.src, TCA_FLOWER_UNSPEC, 2188 sizeof(key->tp_range.tp_max.src))) 2189 return -1; 2190 2191 return 0; 2192 } 2193 2194 static int fl_dump_key_mpls(struct sk_buff *skb, 2195 struct flow_dissector_key_mpls *mpls_key, 2196 struct flow_dissector_key_mpls *mpls_mask) 2197 { 2198 int err; 2199 2200 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 2201 return 0; 2202 if (mpls_mask->mpls_ttl) { 2203 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 2204 mpls_key->mpls_ttl); 2205 if (err) 2206 return err; 2207 } 2208 if (mpls_mask->mpls_tc) { 2209 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 2210 mpls_key->mpls_tc); 2211 if (err) 2212 return err; 2213 } 2214 if (mpls_mask->mpls_label) { 2215 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 2216 mpls_key->mpls_label); 2217 if (err) 2218 return err; 2219 } 2220 if (mpls_mask->mpls_bos) { 2221 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 2222 mpls_key->mpls_bos); 2223 if (err) 2224 return err; 2225 } 2226 return 0; 2227 } 2228 2229 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 2230 struct flow_dissector_key_ip *key, 2231 struct flow_dissector_key_ip *mask) 2232 { 2233 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 2234 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 2235 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 2236 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 2237 2238 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 2239 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 2240 return -1; 2241 2242 return 0; 2243 } 2244 2245 static int fl_dump_key_vlan(struct sk_buff *skb, 2246 int vlan_id_key, int vlan_prio_key, 2247 struct flow_dissector_key_vlan *vlan_key, 2248 struct flow_dissector_key_vlan *vlan_mask) 2249 { 2250 int err; 2251 2252 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 2253 return 0; 2254 if (vlan_mask->vlan_id) { 2255 err = nla_put_u16(skb, vlan_id_key, 2256 vlan_key->vlan_id); 2257 if (err) 2258 return err; 2259 } 2260 if (vlan_mask->vlan_priority) { 2261 err = nla_put_u8(skb, vlan_prio_key, 2262 vlan_key->vlan_priority); 2263 if (err) 2264 return err; 2265 } 2266 return 0; 2267 } 2268 2269 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 2270 u32 *flower_key, u32 *flower_mask, 2271 u32 flower_flag_bit, u32 dissector_flag_bit) 2272 { 2273 if (dissector_mask & dissector_flag_bit) { 2274 *flower_mask |= flower_flag_bit; 2275 if (dissector_key & dissector_flag_bit) 2276 *flower_key |= flower_flag_bit; 2277 } 2278 } 2279 2280 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 2281 { 2282 u32 key, mask; 2283 __be32 _key, _mask; 2284 int err; 2285 2286 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 2287 return 0; 2288 2289 key = 0; 2290 mask = 0; 2291 2292 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2293 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 2294 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 2295 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 2296 FLOW_DIS_FIRST_FRAG); 2297 2298 _key = cpu_to_be32(key); 2299 _mask = cpu_to_be32(mask); 2300 2301 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 2302 if (err) 2303 return err; 2304 2305 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 2306 } 2307 2308 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 2309 struct flow_dissector_key_enc_opts *enc_opts) 2310 { 2311 struct geneve_opt *opt; 2312 struct nlattr *nest; 2313 int opt_off = 0; 2314 2315 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 2316 if (!nest) 2317 goto nla_put_failure; 2318 2319 while (enc_opts->len > opt_off) { 2320 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 2321 2322 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 2323 opt->opt_class)) 2324 goto nla_put_failure; 2325 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 2326 opt->type)) 2327 goto nla_put_failure; 2328 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 2329 opt->length * 4, opt->opt_data)) 2330 goto nla_put_failure; 2331 2332 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 2333 } 2334 nla_nest_end(skb, nest); 2335 return 0; 2336 2337 nla_put_failure: 2338 nla_nest_cancel(skb, nest); 2339 return -EMSGSIZE; 2340 } 2341 2342 static int fl_dump_key_vxlan_opt(struct sk_buff *skb, 2343 struct flow_dissector_key_enc_opts *enc_opts) 2344 { 2345 struct vxlan_metadata *md; 2346 struct nlattr *nest; 2347 2348 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_VXLAN); 2349 if (!nest) 2350 goto nla_put_failure; 2351 2352 md = (struct vxlan_metadata *)&enc_opts->data[0]; 2353 if (nla_put_u32(skb, TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP, md->gbp)) 2354 goto nla_put_failure; 2355 2356 nla_nest_end(skb, nest); 2357 return 0; 2358 2359 nla_put_failure: 2360 nla_nest_cancel(skb, nest); 2361 return -EMSGSIZE; 2362 } 2363 2364 static int fl_dump_key_erspan_opt(struct sk_buff *skb, 2365 struct flow_dissector_key_enc_opts *enc_opts) 2366 { 2367 struct erspan_metadata *md; 2368 struct nlattr *nest; 2369 2370 nest = nla_nest_start_noflag(skb, TCA_FLOWER_KEY_ENC_OPTS_ERSPAN); 2371 if (!nest) 2372 goto nla_put_failure; 2373 2374 md = (struct erspan_metadata *)&enc_opts->data[0]; 2375 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_VER, md->version)) 2376 goto nla_put_failure; 2377 2378 if (md->version == 1 && 2379 nla_put_be32(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_INDEX, md->u.index)) 2380 goto nla_put_failure; 2381 2382 if (md->version == 2 && 2383 (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_DIR, 2384 md->u.md2.dir) || 2385 nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_ERSPAN_HWID, 2386 get_hwid(&md->u.md2)))) 2387 goto nla_put_failure; 2388 2389 nla_nest_end(skb, nest); 2390 return 0; 2391 2392 nla_put_failure: 2393 nla_nest_cancel(skb, nest); 2394 return -EMSGSIZE; 2395 } 2396 2397 static int fl_dump_key_ct(struct sk_buff *skb, 2398 struct flow_dissector_key_ct *key, 2399 struct flow_dissector_key_ct *mask) 2400 { 2401 if (IS_ENABLED(CONFIG_NF_CONNTRACK) && 2402 fl_dump_key_val(skb, &key->ct_state, TCA_FLOWER_KEY_CT_STATE, 2403 &mask->ct_state, TCA_FLOWER_KEY_CT_STATE_MASK, 2404 sizeof(key->ct_state))) 2405 goto nla_put_failure; 2406 2407 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) && 2408 fl_dump_key_val(skb, &key->ct_zone, TCA_FLOWER_KEY_CT_ZONE, 2409 &mask->ct_zone, TCA_FLOWER_KEY_CT_ZONE_MASK, 2410 sizeof(key->ct_zone))) 2411 goto nla_put_failure; 2412 2413 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) && 2414 fl_dump_key_val(skb, &key->ct_mark, TCA_FLOWER_KEY_CT_MARK, 2415 &mask->ct_mark, TCA_FLOWER_KEY_CT_MARK_MASK, 2416 sizeof(key->ct_mark))) 2417 goto nla_put_failure; 2418 2419 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) && 2420 fl_dump_key_val(skb, &key->ct_labels, TCA_FLOWER_KEY_CT_LABELS, 2421 &mask->ct_labels, TCA_FLOWER_KEY_CT_LABELS_MASK, 2422 sizeof(key->ct_labels))) 2423 goto nla_put_failure; 2424 2425 return 0; 2426 2427 nla_put_failure: 2428 return -EMSGSIZE; 2429 } 2430 2431 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 2432 struct flow_dissector_key_enc_opts *enc_opts) 2433 { 2434 struct nlattr *nest; 2435 int err; 2436 2437 if (!enc_opts->len) 2438 return 0; 2439 2440 nest = nla_nest_start_noflag(skb, enc_opt_type); 2441 if (!nest) 2442 goto nla_put_failure; 2443 2444 switch (enc_opts->dst_opt_type) { 2445 case TUNNEL_GENEVE_OPT: 2446 err = fl_dump_key_geneve_opt(skb, enc_opts); 2447 if (err) 2448 goto nla_put_failure; 2449 break; 2450 case TUNNEL_VXLAN_OPT: 2451 err = fl_dump_key_vxlan_opt(skb, enc_opts); 2452 if (err) 2453 goto nla_put_failure; 2454 break; 2455 case TUNNEL_ERSPAN_OPT: 2456 err = fl_dump_key_erspan_opt(skb, enc_opts); 2457 if (err) 2458 goto nla_put_failure; 2459 break; 2460 default: 2461 goto nla_put_failure; 2462 } 2463 nla_nest_end(skb, nest); 2464 return 0; 2465 2466 nla_put_failure: 2467 nla_nest_cancel(skb, nest); 2468 return -EMSGSIZE; 2469 } 2470 2471 static int fl_dump_key_enc_opt(struct sk_buff *skb, 2472 struct flow_dissector_key_enc_opts *key_opts, 2473 struct flow_dissector_key_enc_opts *msk_opts) 2474 { 2475 int err; 2476 2477 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 2478 if (err) 2479 return err; 2480 2481 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 2482 } 2483 2484 static int fl_dump_key(struct sk_buff *skb, struct net *net, 2485 struct fl_flow_key *key, struct fl_flow_key *mask) 2486 { 2487 if (mask->meta.ingress_ifindex) { 2488 struct net_device *dev; 2489 2490 dev = __dev_get_by_index(net, key->meta.ingress_ifindex); 2491 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 2492 goto nla_put_failure; 2493 } 2494 2495 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 2496 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 2497 sizeof(key->eth.dst)) || 2498 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 2499 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 2500 sizeof(key->eth.src)) || 2501 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 2502 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 2503 sizeof(key->basic.n_proto))) 2504 goto nla_put_failure; 2505 2506 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 2507 goto nla_put_failure; 2508 2509 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 2510 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 2511 goto nla_put_failure; 2512 2513 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 2514 TCA_FLOWER_KEY_CVLAN_PRIO, 2515 &key->cvlan, &mask->cvlan) || 2516 (mask->cvlan.vlan_tpid && 2517 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2518 key->cvlan.vlan_tpid))) 2519 goto nla_put_failure; 2520 2521 if (mask->basic.n_proto) { 2522 if (mask->cvlan.vlan_tpid) { 2523 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 2524 key->basic.n_proto)) 2525 goto nla_put_failure; 2526 } else if (mask->vlan.vlan_tpid) { 2527 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 2528 key->basic.n_proto)) 2529 goto nla_put_failure; 2530 } 2531 } 2532 2533 if ((key->basic.n_proto == htons(ETH_P_IP) || 2534 key->basic.n_proto == htons(ETH_P_IPV6)) && 2535 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 2536 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 2537 sizeof(key->basic.ip_proto)) || 2538 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 2539 goto nla_put_failure; 2540 2541 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2542 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 2543 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 2544 sizeof(key->ipv4.src)) || 2545 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 2546 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 2547 sizeof(key->ipv4.dst)))) 2548 goto nla_put_failure; 2549 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2550 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 2551 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 2552 sizeof(key->ipv6.src)) || 2553 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 2554 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 2555 sizeof(key->ipv6.dst)))) 2556 goto nla_put_failure; 2557 2558 if (key->basic.ip_proto == IPPROTO_TCP && 2559 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 2560 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 2561 sizeof(key->tp.src)) || 2562 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 2563 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 2564 sizeof(key->tp.dst)) || 2565 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 2566 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 2567 sizeof(key->tcp.flags)))) 2568 goto nla_put_failure; 2569 else if (key->basic.ip_proto == IPPROTO_UDP && 2570 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 2571 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 2572 sizeof(key->tp.src)) || 2573 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 2574 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 2575 sizeof(key->tp.dst)))) 2576 goto nla_put_failure; 2577 else if (key->basic.ip_proto == IPPROTO_SCTP && 2578 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 2579 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 2580 sizeof(key->tp.src)) || 2581 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 2582 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 2583 sizeof(key->tp.dst)))) 2584 goto nla_put_failure; 2585 else if (key->basic.n_proto == htons(ETH_P_IP) && 2586 key->basic.ip_proto == IPPROTO_ICMP && 2587 (fl_dump_key_val(skb, &key->icmp.type, 2588 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 2589 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 2590 sizeof(key->icmp.type)) || 2591 fl_dump_key_val(skb, &key->icmp.code, 2592 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 2593 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 2594 sizeof(key->icmp.code)))) 2595 goto nla_put_failure; 2596 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 2597 key->basic.ip_proto == IPPROTO_ICMPV6 && 2598 (fl_dump_key_val(skb, &key->icmp.type, 2599 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 2600 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 2601 sizeof(key->icmp.type)) || 2602 fl_dump_key_val(skb, &key->icmp.code, 2603 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 2604 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 2605 sizeof(key->icmp.code)))) 2606 goto nla_put_failure; 2607 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 2608 key->basic.n_proto == htons(ETH_P_RARP)) && 2609 (fl_dump_key_val(skb, &key->arp.sip, 2610 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 2611 TCA_FLOWER_KEY_ARP_SIP_MASK, 2612 sizeof(key->arp.sip)) || 2613 fl_dump_key_val(skb, &key->arp.tip, 2614 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 2615 TCA_FLOWER_KEY_ARP_TIP_MASK, 2616 sizeof(key->arp.tip)) || 2617 fl_dump_key_val(skb, &key->arp.op, 2618 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 2619 TCA_FLOWER_KEY_ARP_OP_MASK, 2620 sizeof(key->arp.op)) || 2621 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 2622 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 2623 sizeof(key->arp.sha)) || 2624 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2625 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2626 sizeof(key->arp.tha)))) 2627 goto nla_put_failure; 2628 2629 if ((key->basic.ip_proto == IPPROTO_TCP || 2630 key->basic.ip_proto == IPPROTO_UDP || 2631 key->basic.ip_proto == IPPROTO_SCTP) && 2632 fl_dump_key_port_range(skb, key, mask)) 2633 goto nla_put_failure; 2634 2635 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2636 (fl_dump_key_val(skb, &key->enc_ipv4.src, 2637 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 2638 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2639 sizeof(key->enc_ipv4.src)) || 2640 fl_dump_key_val(skb, &key->enc_ipv4.dst, 2641 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 2642 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2643 sizeof(key->enc_ipv4.dst)))) 2644 goto nla_put_failure; 2645 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2646 (fl_dump_key_val(skb, &key->enc_ipv6.src, 2647 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 2648 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2649 sizeof(key->enc_ipv6.src)) || 2650 fl_dump_key_val(skb, &key->enc_ipv6.dst, 2651 TCA_FLOWER_KEY_ENC_IPV6_DST, 2652 &mask->enc_ipv6.dst, 2653 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2654 sizeof(key->enc_ipv6.dst)))) 2655 goto nla_put_failure; 2656 2657 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 2658 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 2659 sizeof(key->enc_key_id)) || 2660 fl_dump_key_val(skb, &key->enc_tp.src, 2661 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2662 &mask->enc_tp.src, 2663 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2664 sizeof(key->enc_tp.src)) || 2665 fl_dump_key_val(skb, &key->enc_tp.dst, 2666 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2667 &mask->enc_tp.dst, 2668 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2669 sizeof(key->enc_tp.dst)) || 2670 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 2671 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 2672 goto nla_put_failure; 2673 2674 if (fl_dump_key_ct(skb, &key->ct, &mask->ct)) 2675 goto nla_put_failure; 2676 2677 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 2678 goto nla_put_failure; 2679 2680 return 0; 2681 2682 nla_put_failure: 2683 return -EMSGSIZE; 2684 } 2685 2686 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 2687 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 2688 { 2689 struct cls_fl_filter *f = fh; 2690 struct nlattr *nest; 2691 struct fl_flow_key *key, *mask; 2692 bool skip_hw; 2693 2694 if (!f) 2695 return skb->len; 2696 2697 t->tcm_handle = f->handle; 2698 2699 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2700 if (!nest) 2701 goto nla_put_failure; 2702 2703 spin_lock(&tp->lock); 2704 2705 if (f->res.classid && 2706 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 2707 goto nla_put_failure_locked; 2708 2709 key = &f->key; 2710 mask = &f->mask->key; 2711 skip_hw = tc_skip_hw(f->flags); 2712 2713 if (fl_dump_key(skb, net, key, mask)) 2714 goto nla_put_failure_locked; 2715 2716 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 2717 goto nla_put_failure_locked; 2718 2719 spin_unlock(&tp->lock); 2720 2721 if (!skip_hw) 2722 fl_hw_update_stats(tp, f, rtnl_held); 2723 2724 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 2725 goto nla_put_failure; 2726 2727 if (tcf_exts_dump(skb, &f->exts)) 2728 goto nla_put_failure; 2729 2730 nla_nest_end(skb, nest); 2731 2732 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 2733 goto nla_put_failure; 2734 2735 return skb->len; 2736 2737 nla_put_failure_locked: 2738 spin_unlock(&tp->lock); 2739 nla_put_failure: 2740 nla_nest_cancel(skb, nest); 2741 return -1; 2742 } 2743 2744 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 2745 { 2746 struct fl_flow_tmplt *tmplt = tmplt_priv; 2747 struct fl_flow_key *key, *mask; 2748 struct nlattr *nest; 2749 2750 nest = nla_nest_start_noflag(skb, TCA_OPTIONS); 2751 if (!nest) 2752 goto nla_put_failure; 2753 2754 key = &tmplt->dummy_key; 2755 mask = &tmplt->mask; 2756 2757 if (fl_dump_key(skb, net, key, mask)) 2758 goto nla_put_failure; 2759 2760 nla_nest_end(skb, nest); 2761 2762 return skb->len; 2763 2764 nla_put_failure: 2765 nla_nest_cancel(skb, nest); 2766 return -EMSGSIZE; 2767 } 2768 2769 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q, 2770 unsigned long base) 2771 { 2772 struct cls_fl_filter *f = fh; 2773 2774 if (f && f->res.classid == classid) { 2775 if (cl) 2776 __tcf_bind_filter(q, &f->res, base); 2777 else 2778 __tcf_unbind_filter(q, &f->res); 2779 } 2780 } 2781 2782 static bool fl_delete_empty(struct tcf_proto *tp) 2783 { 2784 struct cls_fl_head *head = fl_head_dereference(tp); 2785 2786 spin_lock(&tp->lock); 2787 tp->deleting = idr_is_empty(&head->handle_idr); 2788 spin_unlock(&tp->lock); 2789 2790 return tp->deleting; 2791 } 2792 2793 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 2794 .kind = "flower", 2795 .classify = fl_classify, 2796 .init = fl_init, 2797 .destroy = fl_destroy, 2798 .get = fl_get, 2799 .put = fl_put, 2800 .change = fl_change, 2801 .delete = fl_delete, 2802 .delete_empty = fl_delete_empty, 2803 .walk = fl_walk, 2804 .reoffload = fl_reoffload, 2805 .hw_add = fl_hw_add, 2806 .hw_del = fl_hw_del, 2807 .dump = fl_dump, 2808 .bind_class = fl_bind_class, 2809 .tmplt_create = fl_tmplt_create, 2810 .tmplt_destroy = fl_tmplt_destroy, 2811 .tmplt_dump = fl_tmplt_dump, 2812 .owner = THIS_MODULE, 2813 .flags = TCF_PROTO_OPS_DOIT_UNLOCKED, 2814 }; 2815 2816 static int __init cls_fl_init(void) 2817 { 2818 return register_tcf_proto_ops(&cls_fl_ops); 2819 } 2820 2821 static void __exit cls_fl_exit(void) 2822 { 2823 unregister_tcf_proto_ops(&cls_fl_ops); 2824 } 2825 2826 module_init(cls_fl_init); 2827 module_exit(cls_fl_exit); 2828 2829 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 2830 MODULE_DESCRIPTION("Flower classifier"); 2831 MODULE_LICENSE("GPL v2"); 2832