1 /* 2 * net/sched/cls_flower.c Flower classifier 3 * 4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/rhashtable.h> 16 #include <linux/workqueue.h> 17 18 #include <linux/if_ether.h> 19 #include <linux/in6.h> 20 #include <linux/ip.h> 21 #include <linux/mpls.h> 22 23 #include <net/sch_generic.h> 24 #include <net/pkt_cls.h> 25 #include <net/ip.h> 26 #include <net/flow_dissector.h> 27 #include <net/geneve.h> 28 29 #include <net/dst.h> 30 #include <net/dst_metadata.h> 31 32 struct fl_flow_key { 33 int indev_ifindex; 34 struct flow_dissector_key_control control; 35 struct flow_dissector_key_control enc_control; 36 struct flow_dissector_key_basic basic; 37 struct flow_dissector_key_eth_addrs eth; 38 struct flow_dissector_key_vlan vlan; 39 struct flow_dissector_key_vlan cvlan; 40 union { 41 struct flow_dissector_key_ipv4_addrs ipv4; 42 struct flow_dissector_key_ipv6_addrs ipv6; 43 }; 44 struct flow_dissector_key_ports tp; 45 struct flow_dissector_key_icmp icmp; 46 struct flow_dissector_key_arp arp; 47 struct flow_dissector_key_keyid enc_key_id; 48 union { 49 struct flow_dissector_key_ipv4_addrs enc_ipv4; 50 struct flow_dissector_key_ipv6_addrs enc_ipv6; 51 }; 52 struct flow_dissector_key_ports enc_tp; 53 struct flow_dissector_key_mpls mpls; 54 struct flow_dissector_key_tcp tcp; 55 struct flow_dissector_key_ip ip; 56 struct flow_dissector_key_ip enc_ip; 57 struct flow_dissector_key_enc_opts enc_opts; 58 struct flow_dissector_key_ports tp_min; 59 struct flow_dissector_key_ports tp_max; 60 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 61 62 struct fl_flow_mask_range { 63 unsigned short int start; 64 unsigned short int end; 65 }; 66 67 struct fl_flow_mask { 68 struct fl_flow_key key; 69 struct fl_flow_mask_range range; 70 u32 flags; 71 struct rhash_head ht_node; 72 struct rhashtable ht; 73 struct rhashtable_params filter_ht_params; 74 struct flow_dissector dissector; 75 struct list_head filters; 76 struct rcu_work rwork; 77 struct list_head list; 78 }; 79 80 struct fl_flow_tmplt { 81 struct fl_flow_key dummy_key; 82 struct fl_flow_key mask; 83 struct flow_dissector dissector; 84 struct tcf_chain *chain; 85 }; 86 87 struct cls_fl_head { 88 struct rhashtable ht; 89 struct list_head masks; 90 struct rcu_work rwork; 91 struct idr handle_idr; 92 }; 93 94 struct cls_fl_filter { 95 struct fl_flow_mask *mask; 96 struct rhash_head ht_node; 97 struct fl_flow_key mkey; 98 struct tcf_exts exts; 99 struct tcf_result res; 100 struct fl_flow_key key; 101 struct list_head list; 102 u32 handle; 103 u32 flags; 104 u32 in_hw_count; 105 struct rcu_work rwork; 106 struct net_device *hw_dev; 107 }; 108 109 static const struct rhashtable_params mask_ht_params = { 110 .key_offset = offsetof(struct fl_flow_mask, key), 111 .key_len = sizeof(struct fl_flow_key), 112 .head_offset = offsetof(struct fl_flow_mask, ht_node), 113 .automatic_shrinking = true, 114 }; 115 116 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 117 { 118 return mask->range.end - mask->range.start; 119 } 120 121 static void fl_mask_update_range(struct fl_flow_mask *mask) 122 { 123 const u8 *bytes = (const u8 *) &mask->key; 124 size_t size = sizeof(mask->key); 125 size_t i, first = 0, last; 126 127 for (i = 0; i < size; i++) { 128 if (bytes[i]) { 129 first = i; 130 break; 131 } 132 } 133 last = first; 134 for (i = size - 1; i != first; i--) { 135 if (bytes[i]) { 136 last = i; 137 break; 138 } 139 } 140 mask->range.start = rounddown(first, sizeof(long)); 141 mask->range.end = roundup(last + 1, sizeof(long)); 142 } 143 144 static void *fl_key_get_start(struct fl_flow_key *key, 145 const struct fl_flow_mask *mask) 146 { 147 return (u8 *) key + mask->range.start; 148 } 149 150 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 151 struct fl_flow_mask *mask) 152 { 153 const long *lkey = fl_key_get_start(key, mask); 154 const long *lmask = fl_key_get_start(&mask->key, mask); 155 long *lmkey = fl_key_get_start(mkey, mask); 156 int i; 157 158 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 159 *lmkey++ = *lkey++ & *lmask++; 160 } 161 162 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 163 struct fl_flow_mask *mask) 164 { 165 const long *lmask = fl_key_get_start(&mask->key, mask); 166 const long *ltmplt; 167 int i; 168 169 if (!tmplt) 170 return true; 171 ltmplt = fl_key_get_start(&tmplt->mask, mask); 172 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 173 if (~*ltmplt++ & *lmask++) 174 return false; 175 } 176 return true; 177 } 178 179 static void fl_clear_masked_range(struct fl_flow_key *key, 180 struct fl_flow_mask *mask) 181 { 182 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 183 } 184 185 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter, 186 struct fl_flow_key *key, 187 struct fl_flow_key *mkey) 188 { 189 __be16 min_mask, max_mask, min_val, max_val; 190 191 min_mask = htons(filter->mask->key.tp_min.dst); 192 max_mask = htons(filter->mask->key.tp_max.dst); 193 min_val = htons(filter->key.tp_min.dst); 194 max_val = htons(filter->key.tp_max.dst); 195 196 if (min_mask && max_mask) { 197 if (htons(key->tp.dst) < min_val || 198 htons(key->tp.dst) > max_val) 199 return false; 200 201 /* skb does not have min and max values */ 202 mkey->tp_min.dst = filter->mkey.tp_min.dst; 203 mkey->tp_max.dst = filter->mkey.tp_max.dst; 204 } 205 return true; 206 } 207 208 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter, 209 struct fl_flow_key *key, 210 struct fl_flow_key *mkey) 211 { 212 __be16 min_mask, max_mask, min_val, max_val; 213 214 min_mask = htons(filter->mask->key.tp_min.src); 215 max_mask = htons(filter->mask->key.tp_max.src); 216 min_val = htons(filter->key.tp_min.src); 217 max_val = htons(filter->key.tp_max.src); 218 219 if (min_mask && max_mask) { 220 if (htons(key->tp.src) < min_val || 221 htons(key->tp.src) > max_val) 222 return false; 223 224 /* skb does not have min and max values */ 225 mkey->tp_min.src = filter->mkey.tp_min.src; 226 mkey->tp_max.src = filter->mkey.tp_max.src; 227 } 228 return true; 229 } 230 231 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask, 232 struct fl_flow_key *mkey) 233 { 234 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 235 mask->filter_ht_params); 236 } 237 238 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask, 239 struct fl_flow_key *mkey, 240 struct fl_flow_key *key) 241 { 242 struct cls_fl_filter *filter, *f; 243 244 list_for_each_entry_rcu(filter, &mask->filters, list) { 245 if (!fl_range_port_dst_cmp(filter, key, mkey)) 246 continue; 247 248 if (!fl_range_port_src_cmp(filter, key, mkey)) 249 continue; 250 251 f = __fl_lookup(mask, mkey); 252 if (f) 253 return f; 254 } 255 return NULL; 256 } 257 258 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask, 259 struct fl_flow_key *mkey, 260 struct fl_flow_key *key) 261 { 262 if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE)) 263 return fl_lookup_range(mask, mkey, key); 264 265 return __fl_lookup(mask, mkey); 266 } 267 268 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 269 struct tcf_result *res) 270 { 271 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 272 struct cls_fl_filter *f; 273 struct fl_flow_mask *mask; 274 struct fl_flow_key skb_key; 275 struct fl_flow_key skb_mkey; 276 277 list_for_each_entry_rcu(mask, &head->masks, list) { 278 fl_clear_masked_range(&skb_key, mask); 279 280 skb_key.indev_ifindex = skb->skb_iif; 281 /* skb_flow_dissect() does not set n_proto in case an unknown 282 * protocol, so do it rather here. 283 */ 284 skb_key.basic.n_proto = skb->protocol; 285 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 286 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 287 288 fl_set_masked_key(&skb_mkey, &skb_key, mask); 289 290 f = fl_lookup(mask, &skb_mkey, &skb_key); 291 if (f && !tc_skip_sw(f->flags)) { 292 *res = f->res; 293 return tcf_exts_exec(skb, &f->exts, res); 294 } 295 } 296 return -1; 297 } 298 299 static int fl_init(struct tcf_proto *tp) 300 { 301 struct cls_fl_head *head; 302 303 head = kzalloc(sizeof(*head), GFP_KERNEL); 304 if (!head) 305 return -ENOBUFS; 306 307 INIT_LIST_HEAD_RCU(&head->masks); 308 rcu_assign_pointer(tp->root, head); 309 idr_init(&head->handle_idr); 310 311 return rhashtable_init(&head->ht, &mask_ht_params); 312 } 313 314 static void fl_mask_free(struct fl_flow_mask *mask) 315 { 316 rhashtable_destroy(&mask->ht); 317 kfree(mask); 318 } 319 320 static void fl_mask_free_work(struct work_struct *work) 321 { 322 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 323 struct fl_flow_mask, rwork); 324 325 fl_mask_free(mask); 326 } 327 328 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask, 329 bool async) 330 { 331 if (!list_empty(&mask->filters)) 332 return false; 333 334 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 335 list_del_rcu(&mask->list); 336 if (async) 337 tcf_queue_work(&mask->rwork, fl_mask_free_work); 338 else 339 fl_mask_free(mask); 340 341 return true; 342 } 343 344 static void __fl_destroy_filter(struct cls_fl_filter *f) 345 { 346 tcf_exts_destroy(&f->exts); 347 tcf_exts_put_net(&f->exts); 348 kfree(f); 349 } 350 351 static void fl_destroy_filter_work(struct work_struct *work) 352 { 353 struct cls_fl_filter *f = container_of(to_rcu_work(work), 354 struct cls_fl_filter, rwork); 355 356 rtnl_lock(); 357 __fl_destroy_filter(f); 358 rtnl_unlock(); 359 } 360 361 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 362 struct netlink_ext_ack *extack) 363 { 364 struct tc_cls_flower_offload cls_flower = {}; 365 struct tcf_block *block = tp->chain->block; 366 367 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 368 cls_flower.command = TC_CLSFLOWER_DESTROY; 369 cls_flower.cookie = (unsigned long) f; 370 371 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 372 tcf_block_offload_dec(block, &f->flags); 373 } 374 375 static int fl_hw_replace_filter(struct tcf_proto *tp, 376 struct cls_fl_filter *f, 377 struct netlink_ext_ack *extack) 378 { 379 struct tc_cls_flower_offload cls_flower = {}; 380 struct tcf_block *block = tp->chain->block; 381 bool skip_sw = tc_skip_sw(f->flags); 382 int err; 383 384 cls_flower.rule = flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 385 if (!cls_flower.rule) 386 return -ENOMEM; 387 388 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 389 cls_flower.command = TC_CLSFLOWER_REPLACE; 390 cls_flower.cookie = (unsigned long) f; 391 cls_flower.rule->match.dissector = &f->mask->dissector; 392 cls_flower.rule->match.mask = &f->mask->key; 393 cls_flower.rule->match.key = &f->mkey; 394 cls_flower.classid = f->res.classid; 395 396 err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts); 397 if (err) { 398 kfree(cls_flower.rule); 399 if (skip_sw) { 400 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 401 return err; 402 } 403 return 0; 404 } 405 406 err = tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw); 407 kfree(cls_flower.rule); 408 409 if (err < 0) { 410 fl_hw_destroy_filter(tp, f, NULL); 411 return err; 412 } else if (err > 0) { 413 f->in_hw_count = err; 414 tcf_block_offload_inc(block, &f->flags); 415 } 416 417 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 418 return -EINVAL; 419 420 return 0; 421 } 422 423 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 424 { 425 struct tc_cls_flower_offload cls_flower = {}; 426 struct tcf_block *block = tp->chain->block; 427 428 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 429 cls_flower.command = TC_CLSFLOWER_STATS; 430 cls_flower.cookie = (unsigned long) f; 431 cls_flower.classid = f->res.classid; 432 433 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 434 435 tcf_exts_stats_update(&f->exts, cls_flower.stats.bytes, 436 cls_flower.stats.pkts, 437 cls_flower.stats.lastused); 438 } 439 440 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 441 struct netlink_ext_ack *extack) 442 { 443 struct cls_fl_head *head = rtnl_dereference(tp->root); 444 bool async = tcf_exts_get_net(&f->exts); 445 bool last; 446 447 idr_remove(&head->handle_idr, f->handle); 448 list_del_rcu(&f->list); 449 last = fl_mask_put(head, f->mask, async); 450 if (!tc_skip_hw(f->flags)) 451 fl_hw_destroy_filter(tp, f, extack); 452 tcf_unbind_filter(tp, &f->res); 453 if (async) 454 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 455 else 456 __fl_destroy_filter(f); 457 458 return last; 459 } 460 461 static void fl_destroy_sleepable(struct work_struct *work) 462 { 463 struct cls_fl_head *head = container_of(to_rcu_work(work), 464 struct cls_fl_head, 465 rwork); 466 467 rhashtable_destroy(&head->ht); 468 kfree(head); 469 module_put(THIS_MODULE); 470 } 471 472 static void fl_destroy(struct tcf_proto *tp, bool rtnl_held, 473 struct netlink_ext_ack *extack) 474 { 475 struct cls_fl_head *head = rtnl_dereference(tp->root); 476 struct fl_flow_mask *mask, *next_mask; 477 struct cls_fl_filter *f, *next; 478 479 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 480 list_for_each_entry_safe(f, next, &mask->filters, list) { 481 if (__fl_delete(tp, f, extack)) 482 break; 483 } 484 } 485 idr_destroy(&head->handle_idr); 486 487 __module_get(THIS_MODULE); 488 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 489 } 490 491 static void *fl_get(struct tcf_proto *tp, u32 handle) 492 { 493 struct cls_fl_head *head = rtnl_dereference(tp->root); 494 495 return idr_find(&head->handle_idr, handle); 496 } 497 498 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 499 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 500 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 501 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 502 .len = IFNAMSIZ }, 503 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 504 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 505 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 506 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 507 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 508 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 509 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 510 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 511 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 512 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 513 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 514 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 515 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 516 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 517 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 518 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 519 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 520 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 521 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 522 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 523 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 524 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 525 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 526 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 527 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 528 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 529 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 530 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 531 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 532 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 533 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 534 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 535 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 536 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 537 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 538 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 539 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 540 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 541 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 542 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 543 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 544 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 545 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 546 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 547 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 548 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 549 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 550 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 551 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 552 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 553 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 554 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 555 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 556 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 557 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 558 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 559 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 560 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 561 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 562 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 563 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 564 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 565 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 566 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 567 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 568 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 569 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 570 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 571 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 572 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 573 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 574 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 575 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 576 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 577 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 578 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 579 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 580 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 581 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 582 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 583 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 584 }; 585 586 static const struct nla_policy 587 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 588 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 589 }; 590 591 static const struct nla_policy 592 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 593 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 594 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 595 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 596 .len = 128 }, 597 }; 598 599 static void fl_set_key_val(struct nlattr **tb, 600 void *val, int val_type, 601 void *mask, int mask_type, int len) 602 { 603 if (!tb[val_type]) 604 return; 605 memcpy(val, nla_data(tb[val_type]), len); 606 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 607 memset(mask, 0xff, len); 608 else 609 memcpy(mask, nla_data(tb[mask_type]), len); 610 } 611 612 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key, 613 struct fl_flow_key *mask) 614 { 615 fl_set_key_val(tb, &key->tp_min.dst, 616 TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_min.dst, 617 TCA_FLOWER_UNSPEC, sizeof(key->tp_min.dst)); 618 fl_set_key_val(tb, &key->tp_max.dst, 619 TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_max.dst, 620 TCA_FLOWER_UNSPEC, sizeof(key->tp_max.dst)); 621 fl_set_key_val(tb, &key->tp_min.src, 622 TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_min.src, 623 TCA_FLOWER_UNSPEC, sizeof(key->tp_min.src)); 624 fl_set_key_val(tb, &key->tp_max.src, 625 TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_max.src, 626 TCA_FLOWER_UNSPEC, sizeof(key->tp_max.src)); 627 628 if ((mask->tp_min.dst && mask->tp_max.dst && 629 htons(key->tp_max.dst) <= htons(key->tp_min.dst)) || 630 (mask->tp_min.src && mask->tp_max.src && 631 htons(key->tp_max.src) <= htons(key->tp_min.src))) 632 return -EINVAL; 633 634 return 0; 635 } 636 637 static int fl_set_key_mpls(struct nlattr **tb, 638 struct flow_dissector_key_mpls *key_val, 639 struct flow_dissector_key_mpls *key_mask) 640 { 641 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 642 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 643 key_mask->mpls_ttl = MPLS_TTL_MASK; 644 } 645 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 646 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 647 648 if (bos & ~MPLS_BOS_MASK) 649 return -EINVAL; 650 key_val->mpls_bos = bos; 651 key_mask->mpls_bos = MPLS_BOS_MASK; 652 } 653 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 654 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 655 656 if (tc & ~MPLS_TC_MASK) 657 return -EINVAL; 658 key_val->mpls_tc = tc; 659 key_mask->mpls_tc = MPLS_TC_MASK; 660 } 661 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 662 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 663 664 if (label & ~MPLS_LABEL_MASK) 665 return -EINVAL; 666 key_val->mpls_label = label; 667 key_mask->mpls_label = MPLS_LABEL_MASK; 668 } 669 return 0; 670 } 671 672 static void fl_set_key_vlan(struct nlattr **tb, 673 __be16 ethertype, 674 int vlan_id_key, int vlan_prio_key, 675 struct flow_dissector_key_vlan *key_val, 676 struct flow_dissector_key_vlan *key_mask) 677 { 678 #define VLAN_PRIORITY_MASK 0x7 679 680 if (tb[vlan_id_key]) { 681 key_val->vlan_id = 682 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 683 key_mask->vlan_id = VLAN_VID_MASK; 684 } 685 if (tb[vlan_prio_key]) { 686 key_val->vlan_priority = 687 nla_get_u8(tb[vlan_prio_key]) & 688 VLAN_PRIORITY_MASK; 689 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 690 } 691 key_val->vlan_tpid = ethertype; 692 key_mask->vlan_tpid = cpu_to_be16(~0); 693 } 694 695 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 696 u32 *dissector_key, u32 *dissector_mask, 697 u32 flower_flag_bit, u32 dissector_flag_bit) 698 { 699 if (flower_mask & flower_flag_bit) { 700 *dissector_mask |= dissector_flag_bit; 701 if (flower_key & flower_flag_bit) 702 *dissector_key |= dissector_flag_bit; 703 } 704 } 705 706 static int fl_set_key_flags(struct nlattr **tb, 707 u32 *flags_key, u32 *flags_mask) 708 { 709 u32 key, mask; 710 711 /* mask is mandatory for flags */ 712 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 713 return -EINVAL; 714 715 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 716 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 717 718 *flags_key = 0; 719 *flags_mask = 0; 720 721 fl_set_key_flag(key, mask, flags_key, flags_mask, 722 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 723 fl_set_key_flag(key, mask, flags_key, flags_mask, 724 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 725 FLOW_DIS_FIRST_FRAG); 726 727 return 0; 728 } 729 730 static void fl_set_key_ip(struct nlattr **tb, bool encap, 731 struct flow_dissector_key_ip *key, 732 struct flow_dissector_key_ip *mask) 733 { 734 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 735 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 736 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 737 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 738 739 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 740 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 741 } 742 743 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 744 int depth, int option_len, 745 struct netlink_ext_ack *extack) 746 { 747 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 748 struct nlattr *class = NULL, *type = NULL, *data = NULL; 749 struct geneve_opt *opt; 750 int err, data_len = 0; 751 752 if (option_len > sizeof(struct geneve_opt)) 753 data_len = option_len - sizeof(struct geneve_opt); 754 755 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 756 memset(opt, 0xff, option_len); 757 opt->length = data_len / 4; 758 opt->r1 = 0; 759 opt->r2 = 0; 760 opt->r3 = 0; 761 762 /* If no mask has been prodived we assume an exact match. */ 763 if (!depth) 764 return sizeof(struct geneve_opt) + data_len; 765 766 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 767 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 768 return -EINVAL; 769 } 770 771 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 772 nla, geneve_opt_policy, extack); 773 if (err < 0) 774 return err; 775 776 /* We are not allowed to omit any of CLASS, TYPE or DATA 777 * fields from the key. 778 */ 779 if (!option_len && 780 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 781 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 782 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 783 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 784 return -EINVAL; 785 } 786 787 /* Omitting any of CLASS, TYPE or DATA fields is allowed 788 * for the mask. 789 */ 790 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 791 int new_len = key->enc_opts.len; 792 793 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 794 data_len = nla_len(data); 795 if (data_len < 4) { 796 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 797 return -ERANGE; 798 } 799 if (data_len % 4) { 800 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 801 return -ERANGE; 802 } 803 804 new_len += sizeof(struct geneve_opt) + data_len; 805 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 806 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 807 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 808 return -ERANGE; 809 } 810 opt->length = data_len / 4; 811 memcpy(opt->opt_data, nla_data(data), data_len); 812 } 813 814 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 815 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 816 opt->opt_class = nla_get_be16(class); 817 } 818 819 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 820 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 821 opt->type = nla_get_u8(type); 822 } 823 824 return sizeof(struct geneve_opt) + data_len; 825 } 826 827 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 828 struct fl_flow_key *mask, 829 struct netlink_ext_ack *extack) 830 { 831 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 832 int err, option_len, key_depth, msk_depth = 0; 833 834 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS], 835 TCA_FLOWER_KEY_ENC_OPTS_MAX, 836 enc_opts_policy, extack); 837 if (err) 838 return err; 839 840 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 841 842 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 843 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 844 TCA_FLOWER_KEY_ENC_OPTS_MAX, 845 enc_opts_policy, extack); 846 if (err) 847 return err; 848 849 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 850 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 851 } 852 853 nla_for_each_attr(nla_opt_key, nla_enc_key, 854 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 855 switch (nla_type(nla_opt_key)) { 856 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 857 option_len = 0; 858 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 859 option_len = fl_set_geneve_opt(nla_opt_key, key, 860 key_depth, option_len, 861 extack); 862 if (option_len < 0) 863 return option_len; 864 865 key->enc_opts.len += option_len; 866 /* At the same time we need to parse through the mask 867 * in order to verify exact and mask attribute lengths. 868 */ 869 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 870 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 871 msk_depth, option_len, 872 extack); 873 if (option_len < 0) 874 return option_len; 875 876 mask->enc_opts.len += option_len; 877 if (key->enc_opts.len != mask->enc_opts.len) { 878 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 879 return -EINVAL; 880 } 881 882 if (msk_depth) 883 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 884 break; 885 default: 886 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 887 return -EINVAL; 888 } 889 } 890 891 return 0; 892 } 893 894 static int fl_set_key(struct net *net, struct nlattr **tb, 895 struct fl_flow_key *key, struct fl_flow_key *mask, 896 struct netlink_ext_ack *extack) 897 { 898 __be16 ethertype; 899 int ret = 0; 900 #ifdef CONFIG_NET_CLS_IND 901 if (tb[TCA_FLOWER_INDEV]) { 902 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 903 if (err < 0) 904 return err; 905 key->indev_ifindex = err; 906 mask->indev_ifindex = 0xffffffff; 907 } 908 #endif 909 910 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 911 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 912 sizeof(key->eth.dst)); 913 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 914 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 915 sizeof(key->eth.src)); 916 917 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 918 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 919 920 if (eth_type_vlan(ethertype)) { 921 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 922 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 923 &mask->vlan); 924 925 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 926 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 927 if (eth_type_vlan(ethertype)) { 928 fl_set_key_vlan(tb, ethertype, 929 TCA_FLOWER_KEY_CVLAN_ID, 930 TCA_FLOWER_KEY_CVLAN_PRIO, 931 &key->cvlan, &mask->cvlan); 932 fl_set_key_val(tb, &key->basic.n_proto, 933 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 934 &mask->basic.n_proto, 935 TCA_FLOWER_UNSPEC, 936 sizeof(key->basic.n_proto)); 937 } else { 938 key->basic.n_proto = ethertype; 939 mask->basic.n_proto = cpu_to_be16(~0); 940 } 941 } 942 } else { 943 key->basic.n_proto = ethertype; 944 mask->basic.n_proto = cpu_to_be16(~0); 945 } 946 } 947 948 if (key->basic.n_proto == htons(ETH_P_IP) || 949 key->basic.n_proto == htons(ETH_P_IPV6)) { 950 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 951 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 952 sizeof(key->basic.ip_proto)); 953 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 954 } 955 956 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 957 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 958 mask->control.addr_type = ~0; 959 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 960 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 961 sizeof(key->ipv4.src)); 962 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 963 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 964 sizeof(key->ipv4.dst)); 965 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 966 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 967 mask->control.addr_type = ~0; 968 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 969 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 970 sizeof(key->ipv6.src)); 971 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 972 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 973 sizeof(key->ipv6.dst)); 974 } 975 976 if (key->basic.ip_proto == IPPROTO_TCP) { 977 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 978 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 979 sizeof(key->tp.src)); 980 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 981 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 982 sizeof(key->tp.dst)); 983 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 984 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 985 sizeof(key->tcp.flags)); 986 } else if (key->basic.ip_proto == IPPROTO_UDP) { 987 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 988 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 989 sizeof(key->tp.src)); 990 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 991 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 992 sizeof(key->tp.dst)); 993 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 994 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 995 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 996 sizeof(key->tp.src)); 997 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 998 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 999 sizeof(key->tp.dst)); 1000 } else if (key->basic.n_proto == htons(ETH_P_IP) && 1001 key->basic.ip_proto == IPPROTO_ICMP) { 1002 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 1003 &mask->icmp.type, 1004 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1005 sizeof(key->icmp.type)); 1006 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 1007 &mask->icmp.code, 1008 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1009 sizeof(key->icmp.code)); 1010 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1011 key->basic.ip_proto == IPPROTO_ICMPV6) { 1012 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 1013 &mask->icmp.type, 1014 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1015 sizeof(key->icmp.type)); 1016 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 1017 &mask->icmp.code, 1018 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1019 sizeof(key->icmp.code)); 1020 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 1021 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 1022 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 1023 if (ret) 1024 return ret; 1025 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 1026 key->basic.n_proto == htons(ETH_P_RARP)) { 1027 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 1028 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 1029 sizeof(key->arp.sip)); 1030 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 1031 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 1032 sizeof(key->arp.tip)); 1033 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 1034 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 1035 sizeof(key->arp.op)); 1036 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1037 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1038 sizeof(key->arp.sha)); 1039 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1040 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1041 sizeof(key->arp.tha)); 1042 } 1043 1044 if (key->basic.ip_proto == IPPROTO_TCP || 1045 key->basic.ip_proto == IPPROTO_UDP || 1046 key->basic.ip_proto == IPPROTO_SCTP) { 1047 ret = fl_set_key_port_range(tb, key, mask); 1048 if (ret) 1049 return ret; 1050 } 1051 1052 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 1053 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 1054 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 1055 mask->enc_control.addr_type = ~0; 1056 fl_set_key_val(tb, &key->enc_ipv4.src, 1057 TCA_FLOWER_KEY_ENC_IPV4_SRC, 1058 &mask->enc_ipv4.src, 1059 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1060 sizeof(key->enc_ipv4.src)); 1061 fl_set_key_val(tb, &key->enc_ipv4.dst, 1062 TCA_FLOWER_KEY_ENC_IPV4_DST, 1063 &mask->enc_ipv4.dst, 1064 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1065 sizeof(key->enc_ipv4.dst)); 1066 } 1067 1068 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 1069 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 1070 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 1071 mask->enc_control.addr_type = ~0; 1072 fl_set_key_val(tb, &key->enc_ipv6.src, 1073 TCA_FLOWER_KEY_ENC_IPV6_SRC, 1074 &mask->enc_ipv6.src, 1075 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1076 sizeof(key->enc_ipv6.src)); 1077 fl_set_key_val(tb, &key->enc_ipv6.dst, 1078 TCA_FLOWER_KEY_ENC_IPV6_DST, 1079 &mask->enc_ipv6.dst, 1080 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1081 sizeof(key->enc_ipv6.dst)); 1082 } 1083 1084 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 1085 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 1086 sizeof(key->enc_key_id.keyid)); 1087 1088 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1089 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1090 sizeof(key->enc_tp.src)); 1091 1092 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1093 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1094 sizeof(key->enc_tp.dst)); 1095 1096 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 1097 1098 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 1099 ret = fl_set_enc_opt(tb, key, mask, extack); 1100 if (ret) 1101 return ret; 1102 } 1103 1104 if (tb[TCA_FLOWER_KEY_FLAGS]) 1105 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 1106 1107 return ret; 1108 } 1109 1110 static void fl_mask_copy(struct fl_flow_mask *dst, 1111 struct fl_flow_mask *src) 1112 { 1113 const void *psrc = fl_key_get_start(&src->key, src); 1114 void *pdst = fl_key_get_start(&dst->key, src); 1115 1116 memcpy(pdst, psrc, fl_mask_range(src)); 1117 dst->range = src->range; 1118 } 1119 1120 static const struct rhashtable_params fl_ht_params = { 1121 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 1122 .head_offset = offsetof(struct cls_fl_filter, ht_node), 1123 .automatic_shrinking = true, 1124 }; 1125 1126 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 1127 { 1128 mask->filter_ht_params = fl_ht_params; 1129 mask->filter_ht_params.key_len = fl_mask_range(mask); 1130 mask->filter_ht_params.key_offset += mask->range.start; 1131 1132 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1133 } 1134 1135 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1136 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member) 1137 1138 #define FL_KEY_IS_MASKED(mask, member) \ 1139 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1140 0, FL_KEY_MEMBER_SIZE(member)) \ 1141 1142 #define FL_KEY_SET(keys, cnt, id, member) \ 1143 do { \ 1144 keys[cnt].key_id = id; \ 1145 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1146 cnt++; \ 1147 } while(0); 1148 1149 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1150 do { \ 1151 if (FL_KEY_IS_MASKED(mask, member)) \ 1152 FL_KEY_SET(keys, cnt, id, member); \ 1153 } while(0); 1154 1155 static void fl_init_dissector(struct flow_dissector *dissector, 1156 struct fl_flow_key *mask) 1157 { 1158 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1159 size_t cnt = 0; 1160 1161 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1162 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1163 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1164 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1165 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1166 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1167 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1168 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1169 if (FL_KEY_IS_MASKED(mask, tp) || 1170 FL_KEY_IS_MASKED(mask, tp_min) || FL_KEY_IS_MASKED(mask, tp_max)) 1171 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp); 1172 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1173 FLOW_DISSECTOR_KEY_IP, ip); 1174 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1175 FLOW_DISSECTOR_KEY_TCP, tcp); 1176 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1177 FLOW_DISSECTOR_KEY_ICMP, icmp); 1178 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1179 FLOW_DISSECTOR_KEY_ARP, arp); 1180 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1181 FLOW_DISSECTOR_KEY_MPLS, mpls); 1182 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1183 FLOW_DISSECTOR_KEY_VLAN, vlan); 1184 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1185 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1186 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1187 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1188 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1189 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1190 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1191 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1192 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1193 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1194 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1195 enc_control); 1196 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1197 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1198 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1199 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1200 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1201 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1202 1203 skb_flow_dissector_init(dissector, keys, cnt); 1204 } 1205 1206 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1207 struct fl_flow_mask *mask) 1208 { 1209 struct fl_flow_mask *newmask; 1210 int err; 1211 1212 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1213 if (!newmask) 1214 return ERR_PTR(-ENOMEM); 1215 1216 fl_mask_copy(newmask, mask); 1217 1218 if ((newmask->key.tp_min.dst && newmask->key.tp_max.dst) || 1219 (newmask->key.tp_min.src && newmask->key.tp_max.src)) 1220 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE; 1221 1222 err = fl_init_mask_hashtable(newmask); 1223 if (err) 1224 goto errout_free; 1225 1226 fl_init_dissector(&newmask->dissector, &newmask->key); 1227 1228 INIT_LIST_HEAD_RCU(&newmask->filters); 1229 1230 err = rhashtable_insert_fast(&head->ht, &newmask->ht_node, 1231 mask_ht_params); 1232 if (err) 1233 goto errout_destroy; 1234 1235 list_add_tail_rcu(&newmask->list, &head->masks); 1236 1237 return newmask; 1238 1239 errout_destroy: 1240 rhashtable_destroy(&newmask->ht); 1241 errout_free: 1242 kfree(newmask); 1243 1244 return ERR_PTR(err); 1245 } 1246 1247 static int fl_check_assign_mask(struct cls_fl_head *head, 1248 struct cls_fl_filter *fnew, 1249 struct cls_fl_filter *fold, 1250 struct fl_flow_mask *mask) 1251 { 1252 struct fl_flow_mask *newmask; 1253 1254 fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params); 1255 if (!fnew->mask) { 1256 if (fold) 1257 return -EINVAL; 1258 1259 newmask = fl_create_new_mask(head, mask); 1260 if (IS_ERR(newmask)) 1261 return PTR_ERR(newmask); 1262 1263 fnew->mask = newmask; 1264 } else if (fold && fold->mask != fnew->mask) { 1265 return -EINVAL; 1266 } 1267 1268 return 0; 1269 } 1270 1271 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1272 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1273 unsigned long base, struct nlattr **tb, 1274 struct nlattr *est, bool ovr, 1275 struct fl_flow_tmplt *tmplt, 1276 struct netlink_ext_ack *extack) 1277 { 1278 int err; 1279 1280 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, true, 1281 extack); 1282 if (err < 0) 1283 return err; 1284 1285 if (tb[TCA_FLOWER_CLASSID]) { 1286 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1287 tcf_bind_filter(tp, &f->res, base); 1288 } 1289 1290 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1291 if (err) 1292 return err; 1293 1294 fl_mask_update_range(mask); 1295 fl_set_masked_key(&f->mkey, &f->key, mask); 1296 1297 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1298 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1299 return -EINVAL; 1300 } 1301 1302 return 0; 1303 } 1304 1305 static int fl_change(struct net *net, struct sk_buff *in_skb, 1306 struct tcf_proto *tp, unsigned long base, 1307 u32 handle, struct nlattr **tca, 1308 void **arg, bool ovr, bool rtnl_held, 1309 struct netlink_ext_ack *extack) 1310 { 1311 struct cls_fl_head *head = rtnl_dereference(tp->root); 1312 struct cls_fl_filter *fold = *arg; 1313 struct cls_fl_filter *fnew; 1314 struct fl_flow_mask *mask; 1315 struct nlattr **tb; 1316 int err; 1317 1318 if (!tca[TCA_OPTIONS]) 1319 return -EINVAL; 1320 1321 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1322 if (!mask) 1323 return -ENOBUFS; 1324 1325 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1326 if (!tb) { 1327 err = -ENOBUFS; 1328 goto errout_mask_alloc; 1329 } 1330 1331 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1332 fl_policy, NULL); 1333 if (err < 0) 1334 goto errout_tb; 1335 1336 if (fold && handle && fold->handle != handle) { 1337 err = -EINVAL; 1338 goto errout_tb; 1339 } 1340 1341 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1342 if (!fnew) { 1343 err = -ENOBUFS; 1344 goto errout_tb; 1345 } 1346 1347 err = tcf_exts_init(&fnew->exts, net, TCA_FLOWER_ACT, 0); 1348 if (err < 0) 1349 goto errout; 1350 1351 if (tb[TCA_FLOWER_FLAGS]) { 1352 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1353 1354 if (!tc_flags_valid(fnew->flags)) { 1355 err = -EINVAL; 1356 goto errout; 1357 } 1358 } 1359 1360 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 1361 tp->chain->tmplt_priv, extack); 1362 if (err) 1363 goto errout; 1364 1365 err = fl_check_assign_mask(head, fnew, fold, mask); 1366 if (err) 1367 goto errout; 1368 1369 if (!handle) { 1370 handle = 1; 1371 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1372 INT_MAX, GFP_KERNEL); 1373 } else if (!fold) { 1374 /* user specifies a handle and it doesn't exist */ 1375 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1376 handle, GFP_KERNEL); 1377 } 1378 if (err) 1379 goto errout_mask; 1380 fnew->handle = handle; 1381 1382 if (!fold && __fl_lookup(fnew->mask, &fnew->mkey)) { 1383 err = -EEXIST; 1384 goto errout_idr; 1385 } 1386 1387 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node, 1388 fnew->mask->filter_ht_params); 1389 if (err) 1390 goto errout_idr; 1391 1392 if (!tc_skip_hw(fnew->flags)) { 1393 err = fl_hw_replace_filter(tp, fnew, extack); 1394 if (err) 1395 goto errout_mask_ht; 1396 } 1397 1398 if (!tc_in_hw(fnew->flags)) 1399 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1400 1401 if (fold) { 1402 rhashtable_remove_fast(&fold->mask->ht, 1403 &fold->ht_node, 1404 fold->mask->filter_ht_params); 1405 if (!tc_skip_hw(fold->flags)) 1406 fl_hw_destroy_filter(tp, fold, NULL); 1407 } 1408 1409 *arg = fnew; 1410 1411 if (fold) { 1412 idr_replace(&head->handle_idr, fnew, fnew->handle); 1413 list_replace_rcu(&fold->list, &fnew->list); 1414 tcf_unbind_filter(tp, &fold->res); 1415 tcf_exts_get_net(&fold->exts); 1416 tcf_queue_work(&fold->rwork, fl_destroy_filter_work); 1417 } else { 1418 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1419 } 1420 1421 kfree(tb); 1422 kfree(mask); 1423 return 0; 1424 1425 errout_mask_ht: 1426 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 1427 fnew->mask->filter_ht_params); 1428 1429 errout_idr: 1430 if (!fold) 1431 idr_remove(&head->handle_idr, fnew->handle); 1432 1433 errout_mask: 1434 fl_mask_put(head, fnew->mask, false); 1435 1436 errout: 1437 tcf_exts_destroy(&fnew->exts); 1438 kfree(fnew); 1439 errout_tb: 1440 kfree(tb); 1441 errout_mask_alloc: 1442 kfree(mask); 1443 return err; 1444 } 1445 1446 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1447 bool rtnl_held, struct netlink_ext_ack *extack) 1448 { 1449 struct cls_fl_head *head = rtnl_dereference(tp->root); 1450 struct cls_fl_filter *f = arg; 1451 1452 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 1453 f->mask->filter_ht_params); 1454 __fl_delete(tp, f, extack); 1455 *last = list_empty(&head->masks); 1456 return 0; 1457 } 1458 1459 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg, 1460 bool rtnl_held) 1461 { 1462 struct cls_fl_head *head = rtnl_dereference(tp->root); 1463 struct cls_fl_filter *f; 1464 1465 arg->count = arg->skip; 1466 1467 while ((f = idr_get_next_ul(&head->handle_idr, 1468 &arg->cookie)) != NULL) { 1469 if (arg->fn(tp, f, arg) < 0) { 1470 arg->stop = 1; 1471 break; 1472 } 1473 arg->cookie = f->handle + 1; 1474 arg->count++; 1475 } 1476 } 1477 1478 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1479 void *cb_priv, struct netlink_ext_ack *extack) 1480 { 1481 struct cls_fl_head *head = rtnl_dereference(tp->root); 1482 struct tc_cls_flower_offload cls_flower = {}; 1483 struct tcf_block *block = tp->chain->block; 1484 struct fl_flow_mask *mask; 1485 struct cls_fl_filter *f; 1486 int err; 1487 1488 list_for_each_entry(mask, &head->masks, list) { 1489 list_for_each_entry(f, &mask->filters, list) { 1490 if (tc_skip_hw(f->flags)) 1491 continue; 1492 1493 cls_flower.rule = 1494 flow_rule_alloc(tcf_exts_num_actions(&f->exts)); 1495 if (!cls_flower.rule) 1496 return -ENOMEM; 1497 1498 tc_cls_common_offload_init(&cls_flower.common, tp, 1499 f->flags, extack); 1500 cls_flower.command = add ? 1501 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1502 cls_flower.cookie = (unsigned long)f; 1503 cls_flower.rule->match.dissector = &mask->dissector; 1504 cls_flower.rule->match.mask = &mask->key; 1505 cls_flower.rule->match.key = &f->mkey; 1506 1507 err = tc_setup_flow_action(&cls_flower.rule->action, 1508 &f->exts); 1509 if (err) { 1510 kfree(cls_flower.rule); 1511 if (tc_skip_sw(f->flags)) { 1512 NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action"); 1513 return err; 1514 } 1515 continue; 1516 } 1517 1518 cls_flower.classid = f->res.classid; 1519 1520 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1521 kfree(cls_flower.rule); 1522 1523 if (err) { 1524 if (add && tc_skip_sw(f->flags)) 1525 return err; 1526 continue; 1527 } 1528 1529 tc_cls_offload_cnt_update(block, &f->in_hw_count, 1530 &f->flags, add); 1531 } 1532 } 1533 1534 return 0; 1535 } 1536 1537 static int fl_hw_create_tmplt(struct tcf_chain *chain, 1538 struct fl_flow_tmplt *tmplt) 1539 { 1540 struct tc_cls_flower_offload cls_flower = {}; 1541 struct tcf_block *block = chain->block; 1542 1543 cls_flower.rule = flow_rule_alloc(0); 1544 if (!cls_flower.rule) 1545 return -ENOMEM; 1546 1547 cls_flower.common.chain_index = chain->index; 1548 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1549 cls_flower.cookie = (unsigned long) tmplt; 1550 cls_flower.rule->match.dissector = &tmplt->dissector; 1551 cls_flower.rule->match.mask = &tmplt->mask; 1552 cls_flower.rule->match.key = &tmplt->dummy_key; 1553 1554 /* We don't care if driver (any of them) fails to handle this 1555 * call. It serves just as a hint for it. 1556 */ 1557 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1558 kfree(cls_flower.rule); 1559 1560 return 0; 1561 } 1562 1563 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1564 struct fl_flow_tmplt *tmplt) 1565 { 1566 struct tc_cls_flower_offload cls_flower = {}; 1567 struct tcf_block *block = chain->block; 1568 1569 cls_flower.common.chain_index = chain->index; 1570 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1571 cls_flower.cookie = (unsigned long) tmplt; 1572 1573 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1574 } 1575 1576 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1577 struct nlattr **tca, 1578 struct netlink_ext_ack *extack) 1579 { 1580 struct fl_flow_tmplt *tmplt; 1581 struct nlattr **tb; 1582 int err; 1583 1584 if (!tca[TCA_OPTIONS]) 1585 return ERR_PTR(-EINVAL); 1586 1587 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1588 if (!tb) 1589 return ERR_PTR(-ENOBUFS); 1590 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1591 fl_policy, NULL); 1592 if (err) 1593 goto errout_tb; 1594 1595 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1596 if (!tmplt) { 1597 err = -ENOMEM; 1598 goto errout_tb; 1599 } 1600 tmplt->chain = chain; 1601 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1602 if (err) 1603 goto errout_tmplt; 1604 1605 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1606 1607 err = fl_hw_create_tmplt(chain, tmplt); 1608 if (err) 1609 goto errout_tmplt; 1610 1611 kfree(tb); 1612 return tmplt; 1613 1614 errout_tmplt: 1615 kfree(tmplt); 1616 errout_tb: 1617 kfree(tb); 1618 return ERR_PTR(err); 1619 } 1620 1621 static void fl_tmplt_destroy(void *tmplt_priv) 1622 { 1623 struct fl_flow_tmplt *tmplt = tmplt_priv; 1624 1625 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1626 kfree(tmplt); 1627 } 1628 1629 static int fl_dump_key_val(struct sk_buff *skb, 1630 void *val, int val_type, 1631 void *mask, int mask_type, int len) 1632 { 1633 int err; 1634 1635 if (!memchr_inv(mask, 0, len)) 1636 return 0; 1637 err = nla_put(skb, val_type, len, val); 1638 if (err) 1639 return err; 1640 if (mask_type != TCA_FLOWER_UNSPEC) { 1641 err = nla_put(skb, mask_type, len, mask); 1642 if (err) 1643 return err; 1644 } 1645 return 0; 1646 } 1647 1648 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 1649 struct fl_flow_key *mask) 1650 { 1651 if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN, 1652 &mask->tp_min.dst, TCA_FLOWER_UNSPEC, 1653 sizeof(key->tp_min.dst)) || 1654 fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX, 1655 &mask->tp_max.dst, TCA_FLOWER_UNSPEC, 1656 sizeof(key->tp_max.dst)) || 1657 fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN, 1658 &mask->tp_min.src, TCA_FLOWER_UNSPEC, 1659 sizeof(key->tp_min.src)) || 1660 fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX, 1661 &mask->tp_max.src, TCA_FLOWER_UNSPEC, 1662 sizeof(key->tp_max.src))) 1663 return -1; 1664 1665 return 0; 1666 } 1667 1668 static int fl_dump_key_mpls(struct sk_buff *skb, 1669 struct flow_dissector_key_mpls *mpls_key, 1670 struct flow_dissector_key_mpls *mpls_mask) 1671 { 1672 int err; 1673 1674 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1675 return 0; 1676 if (mpls_mask->mpls_ttl) { 1677 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1678 mpls_key->mpls_ttl); 1679 if (err) 1680 return err; 1681 } 1682 if (mpls_mask->mpls_tc) { 1683 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1684 mpls_key->mpls_tc); 1685 if (err) 1686 return err; 1687 } 1688 if (mpls_mask->mpls_label) { 1689 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1690 mpls_key->mpls_label); 1691 if (err) 1692 return err; 1693 } 1694 if (mpls_mask->mpls_bos) { 1695 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1696 mpls_key->mpls_bos); 1697 if (err) 1698 return err; 1699 } 1700 return 0; 1701 } 1702 1703 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1704 struct flow_dissector_key_ip *key, 1705 struct flow_dissector_key_ip *mask) 1706 { 1707 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1708 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1709 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1710 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1711 1712 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1713 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1714 return -1; 1715 1716 return 0; 1717 } 1718 1719 static int fl_dump_key_vlan(struct sk_buff *skb, 1720 int vlan_id_key, int vlan_prio_key, 1721 struct flow_dissector_key_vlan *vlan_key, 1722 struct flow_dissector_key_vlan *vlan_mask) 1723 { 1724 int err; 1725 1726 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1727 return 0; 1728 if (vlan_mask->vlan_id) { 1729 err = nla_put_u16(skb, vlan_id_key, 1730 vlan_key->vlan_id); 1731 if (err) 1732 return err; 1733 } 1734 if (vlan_mask->vlan_priority) { 1735 err = nla_put_u8(skb, vlan_prio_key, 1736 vlan_key->vlan_priority); 1737 if (err) 1738 return err; 1739 } 1740 return 0; 1741 } 1742 1743 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1744 u32 *flower_key, u32 *flower_mask, 1745 u32 flower_flag_bit, u32 dissector_flag_bit) 1746 { 1747 if (dissector_mask & dissector_flag_bit) { 1748 *flower_mask |= flower_flag_bit; 1749 if (dissector_key & dissector_flag_bit) 1750 *flower_key |= flower_flag_bit; 1751 } 1752 } 1753 1754 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1755 { 1756 u32 key, mask; 1757 __be32 _key, _mask; 1758 int err; 1759 1760 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1761 return 0; 1762 1763 key = 0; 1764 mask = 0; 1765 1766 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1767 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1768 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1769 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1770 FLOW_DIS_FIRST_FRAG); 1771 1772 _key = cpu_to_be32(key); 1773 _mask = cpu_to_be32(mask); 1774 1775 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1776 if (err) 1777 return err; 1778 1779 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1780 } 1781 1782 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 1783 struct flow_dissector_key_enc_opts *enc_opts) 1784 { 1785 struct geneve_opt *opt; 1786 struct nlattr *nest; 1787 int opt_off = 0; 1788 1789 nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 1790 if (!nest) 1791 goto nla_put_failure; 1792 1793 while (enc_opts->len > opt_off) { 1794 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 1795 1796 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 1797 opt->opt_class)) 1798 goto nla_put_failure; 1799 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 1800 opt->type)) 1801 goto nla_put_failure; 1802 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 1803 opt->length * 4, opt->opt_data)) 1804 goto nla_put_failure; 1805 1806 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 1807 } 1808 nla_nest_end(skb, nest); 1809 return 0; 1810 1811 nla_put_failure: 1812 nla_nest_cancel(skb, nest); 1813 return -EMSGSIZE; 1814 } 1815 1816 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 1817 struct flow_dissector_key_enc_opts *enc_opts) 1818 { 1819 struct nlattr *nest; 1820 int err; 1821 1822 if (!enc_opts->len) 1823 return 0; 1824 1825 nest = nla_nest_start(skb, enc_opt_type); 1826 if (!nest) 1827 goto nla_put_failure; 1828 1829 switch (enc_opts->dst_opt_type) { 1830 case TUNNEL_GENEVE_OPT: 1831 err = fl_dump_key_geneve_opt(skb, enc_opts); 1832 if (err) 1833 goto nla_put_failure; 1834 break; 1835 default: 1836 goto nla_put_failure; 1837 } 1838 nla_nest_end(skb, nest); 1839 return 0; 1840 1841 nla_put_failure: 1842 nla_nest_cancel(skb, nest); 1843 return -EMSGSIZE; 1844 } 1845 1846 static int fl_dump_key_enc_opt(struct sk_buff *skb, 1847 struct flow_dissector_key_enc_opts *key_opts, 1848 struct flow_dissector_key_enc_opts *msk_opts) 1849 { 1850 int err; 1851 1852 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 1853 if (err) 1854 return err; 1855 1856 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 1857 } 1858 1859 static int fl_dump_key(struct sk_buff *skb, struct net *net, 1860 struct fl_flow_key *key, struct fl_flow_key *mask) 1861 { 1862 if (mask->indev_ifindex) { 1863 struct net_device *dev; 1864 1865 dev = __dev_get_by_index(net, key->indev_ifindex); 1866 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1867 goto nla_put_failure; 1868 } 1869 1870 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1871 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1872 sizeof(key->eth.dst)) || 1873 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1874 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1875 sizeof(key->eth.src)) || 1876 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1877 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1878 sizeof(key->basic.n_proto))) 1879 goto nla_put_failure; 1880 1881 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1882 goto nla_put_failure; 1883 1884 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 1885 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 1886 goto nla_put_failure; 1887 1888 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 1889 TCA_FLOWER_KEY_CVLAN_PRIO, 1890 &key->cvlan, &mask->cvlan) || 1891 (mask->cvlan.vlan_tpid && 1892 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1893 key->cvlan.vlan_tpid))) 1894 goto nla_put_failure; 1895 1896 if (mask->basic.n_proto) { 1897 if (mask->cvlan.vlan_tpid) { 1898 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1899 key->basic.n_proto)) 1900 goto nla_put_failure; 1901 } else if (mask->vlan.vlan_tpid) { 1902 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1903 key->basic.n_proto)) 1904 goto nla_put_failure; 1905 } 1906 } 1907 1908 if ((key->basic.n_proto == htons(ETH_P_IP) || 1909 key->basic.n_proto == htons(ETH_P_IPV6)) && 1910 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1911 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1912 sizeof(key->basic.ip_proto)) || 1913 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 1914 goto nla_put_failure; 1915 1916 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1917 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1918 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1919 sizeof(key->ipv4.src)) || 1920 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1921 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1922 sizeof(key->ipv4.dst)))) 1923 goto nla_put_failure; 1924 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1925 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1926 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1927 sizeof(key->ipv6.src)) || 1928 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1929 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1930 sizeof(key->ipv6.dst)))) 1931 goto nla_put_failure; 1932 1933 if (key->basic.ip_proto == IPPROTO_TCP && 1934 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1935 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1936 sizeof(key->tp.src)) || 1937 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1938 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1939 sizeof(key->tp.dst)) || 1940 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1941 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1942 sizeof(key->tcp.flags)))) 1943 goto nla_put_failure; 1944 else if (key->basic.ip_proto == IPPROTO_UDP && 1945 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1946 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1947 sizeof(key->tp.src)) || 1948 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1949 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1950 sizeof(key->tp.dst)))) 1951 goto nla_put_failure; 1952 else if (key->basic.ip_proto == IPPROTO_SCTP && 1953 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1954 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1955 sizeof(key->tp.src)) || 1956 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1957 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1958 sizeof(key->tp.dst)))) 1959 goto nla_put_failure; 1960 else if (key->basic.n_proto == htons(ETH_P_IP) && 1961 key->basic.ip_proto == IPPROTO_ICMP && 1962 (fl_dump_key_val(skb, &key->icmp.type, 1963 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1964 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1965 sizeof(key->icmp.type)) || 1966 fl_dump_key_val(skb, &key->icmp.code, 1967 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1968 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1969 sizeof(key->icmp.code)))) 1970 goto nla_put_failure; 1971 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1972 key->basic.ip_proto == IPPROTO_ICMPV6 && 1973 (fl_dump_key_val(skb, &key->icmp.type, 1974 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1975 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1976 sizeof(key->icmp.type)) || 1977 fl_dump_key_val(skb, &key->icmp.code, 1978 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1979 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1980 sizeof(key->icmp.code)))) 1981 goto nla_put_failure; 1982 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1983 key->basic.n_proto == htons(ETH_P_RARP)) && 1984 (fl_dump_key_val(skb, &key->arp.sip, 1985 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1986 TCA_FLOWER_KEY_ARP_SIP_MASK, 1987 sizeof(key->arp.sip)) || 1988 fl_dump_key_val(skb, &key->arp.tip, 1989 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1990 TCA_FLOWER_KEY_ARP_TIP_MASK, 1991 sizeof(key->arp.tip)) || 1992 fl_dump_key_val(skb, &key->arp.op, 1993 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1994 TCA_FLOWER_KEY_ARP_OP_MASK, 1995 sizeof(key->arp.op)) || 1996 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1997 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1998 sizeof(key->arp.sha)) || 1999 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 2000 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 2001 sizeof(key->arp.tha)))) 2002 goto nla_put_failure; 2003 2004 if ((key->basic.ip_proto == IPPROTO_TCP || 2005 key->basic.ip_proto == IPPROTO_UDP || 2006 key->basic.ip_proto == IPPROTO_SCTP) && 2007 fl_dump_key_port_range(skb, key, mask)) 2008 goto nla_put_failure; 2009 2010 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 2011 (fl_dump_key_val(skb, &key->enc_ipv4.src, 2012 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 2013 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 2014 sizeof(key->enc_ipv4.src)) || 2015 fl_dump_key_val(skb, &key->enc_ipv4.dst, 2016 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 2017 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 2018 sizeof(key->enc_ipv4.dst)))) 2019 goto nla_put_failure; 2020 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 2021 (fl_dump_key_val(skb, &key->enc_ipv6.src, 2022 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 2023 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 2024 sizeof(key->enc_ipv6.src)) || 2025 fl_dump_key_val(skb, &key->enc_ipv6.dst, 2026 TCA_FLOWER_KEY_ENC_IPV6_DST, 2027 &mask->enc_ipv6.dst, 2028 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 2029 sizeof(key->enc_ipv6.dst)))) 2030 goto nla_put_failure; 2031 2032 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 2033 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 2034 sizeof(key->enc_key_id)) || 2035 fl_dump_key_val(skb, &key->enc_tp.src, 2036 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 2037 &mask->enc_tp.src, 2038 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 2039 sizeof(key->enc_tp.src)) || 2040 fl_dump_key_val(skb, &key->enc_tp.dst, 2041 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 2042 &mask->enc_tp.dst, 2043 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 2044 sizeof(key->enc_tp.dst)) || 2045 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 2046 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 2047 goto nla_put_failure; 2048 2049 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 2050 goto nla_put_failure; 2051 2052 return 0; 2053 2054 nla_put_failure: 2055 return -EMSGSIZE; 2056 } 2057 2058 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 2059 struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) 2060 { 2061 struct cls_fl_filter *f = fh; 2062 struct nlattr *nest; 2063 struct fl_flow_key *key, *mask; 2064 2065 if (!f) 2066 return skb->len; 2067 2068 t->tcm_handle = f->handle; 2069 2070 nest = nla_nest_start(skb, TCA_OPTIONS); 2071 if (!nest) 2072 goto nla_put_failure; 2073 2074 if (f->res.classid && 2075 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 2076 goto nla_put_failure; 2077 2078 key = &f->key; 2079 mask = &f->mask->key; 2080 2081 if (fl_dump_key(skb, net, key, mask)) 2082 goto nla_put_failure; 2083 2084 if (!tc_skip_hw(f->flags)) 2085 fl_hw_update_stats(tp, f); 2086 2087 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 2088 goto nla_put_failure; 2089 2090 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 2091 goto nla_put_failure; 2092 2093 if (tcf_exts_dump(skb, &f->exts)) 2094 goto nla_put_failure; 2095 2096 nla_nest_end(skb, nest); 2097 2098 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 2099 goto nla_put_failure; 2100 2101 return skb->len; 2102 2103 nla_put_failure: 2104 nla_nest_cancel(skb, nest); 2105 return -1; 2106 } 2107 2108 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 2109 { 2110 struct fl_flow_tmplt *tmplt = tmplt_priv; 2111 struct fl_flow_key *key, *mask; 2112 struct nlattr *nest; 2113 2114 nest = nla_nest_start(skb, TCA_OPTIONS); 2115 if (!nest) 2116 goto nla_put_failure; 2117 2118 key = &tmplt->dummy_key; 2119 mask = &tmplt->mask; 2120 2121 if (fl_dump_key(skb, net, key, mask)) 2122 goto nla_put_failure; 2123 2124 nla_nest_end(skb, nest); 2125 2126 return skb->len; 2127 2128 nla_put_failure: 2129 nla_nest_cancel(skb, nest); 2130 return -EMSGSIZE; 2131 } 2132 2133 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 2134 { 2135 struct cls_fl_filter *f = fh; 2136 2137 if (f && f->res.classid == classid) 2138 f->res.class = cl; 2139 } 2140 2141 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 2142 .kind = "flower", 2143 .classify = fl_classify, 2144 .init = fl_init, 2145 .destroy = fl_destroy, 2146 .get = fl_get, 2147 .change = fl_change, 2148 .delete = fl_delete, 2149 .walk = fl_walk, 2150 .reoffload = fl_reoffload, 2151 .dump = fl_dump, 2152 .bind_class = fl_bind_class, 2153 .tmplt_create = fl_tmplt_create, 2154 .tmplt_destroy = fl_tmplt_destroy, 2155 .tmplt_dump = fl_tmplt_dump, 2156 .owner = THIS_MODULE, 2157 }; 2158 2159 static int __init cls_fl_init(void) 2160 { 2161 return register_tcf_proto_ops(&cls_fl_ops); 2162 } 2163 2164 static void __exit cls_fl_exit(void) 2165 { 2166 unregister_tcf_proto_ops(&cls_fl_ops); 2167 } 2168 2169 module_init(cls_fl_init); 2170 module_exit(cls_fl_exit); 2171 2172 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 2173 MODULE_DESCRIPTION("Flower classifier"); 2174 MODULE_LICENSE("GPL v2"); 2175