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