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