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 fl_flow_mask *mask; 1294 struct nlattr **tb; 1295 int err; 1296 1297 if (!tca[TCA_OPTIONS]) 1298 return -EINVAL; 1299 1300 mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL); 1301 if (!mask) 1302 return -ENOBUFS; 1303 1304 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1305 if (!tb) { 1306 err = -ENOBUFS; 1307 goto errout_mask_alloc; 1308 } 1309 1310 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1311 fl_policy, NULL); 1312 if (err < 0) 1313 goto errout_tb; 1314 1315 if (fold && handle && fold->handle != handle) { 1316 err = -EINVAL; 1317 goto errout_tb; 1318 } 1319 1320 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1321 if (!fnew) { 1322 err = -ENOBUFS; 1323 goto errout_tb; 1324 } 1325 1326 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 1327 if (err < 0) 1328 goto errout; 1329 1330 if (!handle) { 1331 handle = 1; 1332 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1333 INT_MAX, GFP_KERNEL); 1334 } else if (!fold) { 1335 /* user specifies a handle and it doesn't exist */ 1336 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1337 handle, GFP_KERNEL); 1338 } 1339 if (err) 1340 goto errout; 1341 fnew->handle = handle; 1342 1343 if (tb[TCA_FLOWER_FLAGS]) { 1344 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1345 1346 if (!tc_flags_valid(fnew->flags)) { 1347 err = -EINVAL; 1348 goto errout_idr; 1349 } 1350 } 1351 1352 err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr, 1353 tp->chain->tmplt_priv, extack); 1354 if (err) 1355 goto errout_idr; 1356 1357 err = fl_check_assign_mask(head, fnew, fold, mask); 1358 if (err) 1359 goto errout_idr; 1360 1361 if (!fold && __fl_lookup(fnew->mask, &fnew->mkey)) { 1362 err = -EEXIST; 1363 goto errout_mask; 1364 } 1365 1366 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node, 1367 fnew->mask->filter_ht_params); 1368 if (err) 1369 goto errout_mask; 1370 1371 if (!tc_skip_hw(fnew->flags)) { 1372 err = fl_hw_replace_filter(tp, fnew, extack); 1373 if (err) 1374 goto errout_mask_ht; 1375 } 1376 1377 if (!tc_in_hw(fnew->flags)) 1378 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1379 1380 if (fold) { 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 kfree(mask); 1402 return 0; 1403 1404 errout_mask_ht: 1405 rhashtable_remove_fast(&fnew->mask->ht, &fnew->ht_node, 1406 fnew->mask->filter_ht_params); 1407 1408 errout_mask: 1409 fl_mask_put(head, fnew->mask, false); 1410 1411 errout_idr: 1412 if (!fold) 1413 idr_remove(&head->handle_idr, fnew->handle); 1414 errout: 1415 tcf_exts_destroy(&fnew->exts); 1416 kfree(fnew); 1417 errout_tb: 1418 kfree(tb); 1419 errout_mask_alloc: 1420 kfree(mask); 1421 return err; 1422 } 1423 1424 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1425 struct netlink_ext_ack *extack) 1426 { 1427 struct cls_fl_head *head = rtnl_dereference(tp->root); 1428 struct cls_fl_filter *f = arg; 1429 1430 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 1431 f->mask->filter_ht_params); 1432 __fl_delete(tp, f, extack); 1433 *last = list_empty(&head->masks); 1434 return 0; 1435 } 1436 1437 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1438 { 1439 struct cls_fl_head *head = rtnl_dereference(tp->root); 1440 struct cls_fl_filter *f; 1441 1442 arg->count = arg->skip; 1443 1444 while ((f = idr_get_next_ul(&head->handle_idr, 1445 &arg->cookie)) != NULL) { 1446 if (arg->fn(tp, f, arg) < 0) { 1447 arg->stop = 1; 1448 break; 1449 } 1450 arg->cookie = f->handle + 1; 1451 arg->count++; 1452 } 1453 } 1454 1455 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1456 void *cb_priv, struct netlink_ext_ack *extack) 1457 { 1458 struct cls_fl_head *head = rtnl_dereference(tp->root); 1459 struct tc_cls_flower_offload cls_flower = {}; 1460 struct tcf_block *block = tp->chain->block; 1461 struct fl_flow_mask *mask; 1462 struct cls_fl_filter *f; 1463 int err; 1464 1465 list_for_each_entry(mask, &head->masks, list) { 1466 list_for_each_entry(f, &mask->filters, list) { 1467 if (tc_skip_hw(f->flags)) 1468 continue; 1469 1470 tc_cls_common_offload_init(&cls_flower.common, tp, 1471 f->flags, extack); 1472 cls_flower.command = add ? 1473 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1474 cls_flower.cookie = (unsigned long)f; 1475 cls_flower.dissector = &mask->dissector; 1476 cls_flower.mask = &mask->key; 1477 cls_flower.key = &f->mkey; 1478 cls_flower.exts = &f->exts; 1479 cls_flower.classid = f->res.classid; 1480 1481 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1482 if (err) { 1483 if (add && tc_skip_sw(f->flags)) 1484 return err; 1485 continue; 1486 } 1487 1488 tc_cls_offload_cnt_update(block, &f->in_hw_count, 1489 &f->flags, add); 1490 } 1491 } 1492 1493 return 0; 1494 } 1495 1496 static void fl_hw_create_tmplt(struct tcf_chain *chain, 1497 struct fl_flow_tmplt *tmplt) 1498 { 1499 struct tc_cls_flower_offload cls_flower = {}; 1500 struct tcf_block *block = chain->block; 1501 struct tcf_exts dummy_exts = { 0, }; 1502 1503 cls_flower.common.chain_index = chain->index; 1504 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1505 cls_flower.cookie = (unsigned long) tmplt; 1506 cls_flower.dissector = &tmplt->dissector; 1507 cls_flower.mask = &tmplt->mask; 1508 cls_flower.key = &tmplt->dummy_key; 1509 cls_flower.exts = &dummy_exts; 1510 1511 /* We don't care if driver (any of them) fails to handle this 1512 * call. It serves just as a hint for it. 1513 */ 1514 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1515 } 1516 1517 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1518 struct fl_flow_tmplt *tmplt) 1519 { 1520 struct tc_cls_flower_offload cls_flower = {}; 1521 struct tcf_block *block = chain->block; 1522 1523 cls_flower.common.chain_index = chain->index; 1524 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1525 cls_flower.cookie = (unsigned long) tmplt; 1526 1527 tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false); 1528 } 1529 1530 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1531 struct nlattr **tca, 1532 struct netlink_ext_ack *extack) 1533 { 1534 struct fl_flow_tmplt *tmplt; 1535 struct nlattr **tb; 1536 int err; 1537 1538 if (!tca[TCA_OPTIONS]) 1539 return ERR_PTR(-EINVAL); 1540 1541 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1542 if (!tb) 1543 return ERR_PTR(-ENOBUFS); 1544 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1545 fl_policy, NULL); 1546 if (err) 1547 goto errout_tb; 1548 1549 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1550 if (!tmplt) { 1551 err = -ENOMEM; 1552 goto errout_tb; 1553 } 1554 tmplt->chain = chain; 1555 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1556 if (err) 1557 goto errout_tmplt; 1558 kfree(tb); 1559 1560 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1561 1562 fl_hw_create_tmplt(chain, tmplt); 1563 1564 return tmplt; 1565 1566 errout_tmplt: 1567 kfree(tmplt); 1568 errout_tb: 1569 kfree(tb); 1570 return ERR_PTR(err); 1571 } 1572 1573 static void fl_tmplt_destroy(void *tmplt_priv) 1574 { 1575 struct fl_flow_tmplt *tmplt = tmplt_priv; 1576 1577 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1578 kfree(tmplt); 1579 } 1580 1581 static int fl_dump_key_val(struct sk_buff *skb, 1582 void *val, int val_type, 1583 void *mask, int mask_type, int len) 1584 { 1585 int err; 1586 1587 if (!memchr_inv(mask, 0, len)) 1588 return 0; 1589 err = nla_put(skb, val_type, len, val); 1590 if (err) 1591 return err; 1592 if (mask_type != TCA_FLOWER_UNSPEC) { 1593 err = nla_put(skb, mask_type, len, mask); 1594 if (err) 1595 return err; 1596 } 1597 return 0; 1598 } 1599 1600 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key, 1601 struct fl_flow_key *mask) 1602 { 1603 if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN, 1604 &mask->tp_min.dst, TCA_FLOWER_UNSPEC, 1605 sizeof(key->tp_min.dst)) || 1606 fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX, 1607 &mask->tp_max.dst, TCA_FLOWER_UNSPEC, 1608 sizeof(key->tp_max.dst)) || 1609 fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN, 1610 &mask->tp_min.src, TCA_FLOWER_UNSPEC, 1611 sizeof(key->tp_min.src)) || 1612 fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX, 1613 &mask->tp_max.src, TCA_FLOWER_UNSPEC, 1614 sizeof(key->tp_max.src))) 1615 return -1; 1616 1617 return 0; 1618 } 1619 1620 static int fl_dump_key_mpls(struct sk_buff *skb, 1621 struct flow_dissector_key_mpls *mpls_key, 1622 struct flow_dissector_key_mpls *mpls_mask) 1623 { 1624 int err; 1625 1626 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1627 return 0; 1628 if (mpls_mask->mpls_ttl) { 1629 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1630 mpls_key->mpls_ttl); 1631 if (err) 1632 return err; 1633 } 1634 if (mpls_mask->mpls_tc) { 1635 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1636 mpls_key->mpls_tc); 1637 if (err) 1638 return err; 1639 } 1640 if (mpls_mask->mpls_label) { 1641 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1642 mpls_key->mpls_label); 1643 if (err) 1644 return err; 1645 } 1646 if (mpls_mask->mpls_bos) { 1647 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1648 mpls_key->mpls_bos); 1649 if (err) 1650 return err; 1651 } 1652 return 0; 1653 } 1654 1655 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1656 struct flow_dissector_key_ip *key, 1657 struct flow_dissector_key_ip *mask) 1658 { 1659 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1660 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1661 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1662 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1663 1664 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1665 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1666 return -1; 1667 1668 return 0; 1669 } 1670 1671 static int fl_dump_key_vlan(struct sk_buff *skb, 1672 int vlan_id_key, int vlan_prio_key, 1673 struct flow_dissector_key_vlan *vlan_key, 1674 struct flow_dissector_key_vlan *vlan_mask) 1675 { 1676 int err; 1677 1678 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1679 return 0; 1680 if (vlan_mask->vlan_id) { 1681 err = nla_put_u16(skb, vlan_id_key, 1682 vlan_key->vlan_id); 1683 if (err) 1684 return err; 1685 } 1686 if (vlan_mask->vlan_priority) { 1687 err = nla_put_u8(skb, vlan_prio_key, 1688 vlan_key->vlan_priority); 1689 if (err) 1690 return err; 1691 } 1692 return 0; 1693 } 1694 1695 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1696 u32 *flower_key, u32 *flower_mask, 1697 u32 flower_flag_bit, u32 dissector_flag_bit) 1698 { 1699 if (dissector_mask & dissector_flag_bit) { 1700 *flower_mask |= flower_flag_bit; 1701 if (dissector_key & dissector_flag_bit) 1702 *flower_key |= flower_flag_bit; 1703 } 1704 } 1705 1706 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1707 { 1708 u32 key, mask; 1709 __be32 _key, _mask; 1710 int err; 1711 1712 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1713 return 0; 1714 1715 key = 0; 1716 mask = 0; 1717 1718 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1719 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1720 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1721 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1722 FLOW_DIS_FIRST_FRAG); 1723 1724 _key = cpu_to_be32(key); 1725 _mask = cpu_to_be32(mask); 1726 1727 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1728 if (err) 1729 return err; 1730 1731 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1732 } 1733 1734 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 1735 struct flow_dissector_key_enc_opts *enc_opts) 1736 { 1737 struct geneve_opt *opt; 1738 struct nlattr *nest; 1739 int opt_off = 0; 1740 1741 nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 1742 if (!nest) 1743 goto nla_put_failure; 1744 1745 while (enc_opts->len > opt_off) { 1746 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 1747 1748 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 1749 opt->opt_class)) 1750 goto nla_put_failure; 1751 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 1752 opt->type)) 1753 goto nla_put_failure; 1754 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 1755 opt->length * 4, opt->opt_data)) 1756 goto nla_put_failure; 1757 1758 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 1759 } 1760 nla_nest_end(skb, nest); 1761 return 0; 1762 1763 nla_put_failure: 1764 nla_nest_cancel(skb, nest); 1765 return -EMSGSIZE; 1766 } 1767 1768 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 1769 struct flow_dissector_key_enc_opts *enc_opts) 1770 { 1771 struct nlattr *nest; 1772 int err; 1773 1774 if (!enc_opts->len) 1775 return 0; 1776 1777 nest = nla_nest_start(skb, enc_opt_type); 1778 if (!nest) 1779 goto nla_put_failure; 1780 1781 switch (enc_opts->dst_opt_type) { 1782 case TUNNEL_GENEVE_OPT: 1783 err = fl_dump_key_geneve_opt(skb, enc_opts); 1784 if (err) 1785 goto nla_put_failure; 1786 break; 1787 default: 1788 goto nla_put_failure; 1789 } 1790 nla_nest_end(skb, nest); 1791 return 0; 1792 1793 nla_put_failure: 1794 nla_nest_cancel(skb, nest); 1795 return -EMSGSIZE; 1796 } 1797 1798 static int fl_dump_key_enc_opt(struct sk_buff *skb, 1799 struct flow_dissector_key_enc_opts *key_opts, 1800 struct flow_dissector_key_enc_opts *msk_opts) 1801 { 1802 int err; 1803 1804 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 1805 if (err) 1806 return err; 1807 1808 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 1809 } 1810 1811 static int fl_dump_key(struct sk_buff *skb, struct net *net, 1812 struct fl_flow_key *key, struct fl_flow_key *mask) 1813 { 1814 if (mask->indev_ifindex) { 1815 struct net_device *dev; 1816 1817 dev = __dev_get_by_index(net, key->indev_ifindex); 1818 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1819 goto nla_put_failure; 1820 } 1821 1822 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1823 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1824 sizeof(key->eth.dst)) || 1825 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1826 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1827 sizeof(key->eth.src)) || 1828 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1829 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1830 sizeof(key->basic.n_proto))) 1831 goto nla_put_failure; 1832 1833 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1834 goto nla_put_failure; 1835 1836 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 1837 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 1838 goto nla_put_failure; 1839 1840 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 1841 TCA_FLOWER_KEY_CVLAN_PRIO, 1842 &key->cvlan, &mask->cvlan) || 1843 (mask->cvlan.vlan_tpid && 1844 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1845 key->cvlan.vlan_tpid))) 1846 goto nla_put_failure; 1847 1848 if (mask->basic.n_proto) { 1849 if (mask->cvlan.vlan_tpid) { 1850 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1851 key->basic.n_proto)) 1852 goto nla_put_failure; 1853 } else if (mask->vlan.vlan_tpid) { 1854 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1855 key->basic.n_proto)) 1856 goto nla_put_failure; 1857 } 1858 } 1859 1860 if ((key->basic.n_proto == htons(ETH_P_IP) || 1861 key->basic.n_proto == htons(ETH_P_IPV6)) && 1862 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1863 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1864 sizeof(key->basic.ip_proto)) || 1865 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 1866 goto nla_put_failure; 1867 1868 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1869 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1870 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1871 sizeof(key->ipv4.src)) || 1872 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1873 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1874 sizeof(key->ipv4.dst)))) 1875 goto nla_put_failure; 1876 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1877 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1878 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1879 sizeof(key->ipv6.src)) || 1880 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1881 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1882 sizeof(key->ipv6.dst)))) 1883 goto nla_put_failure; 1884 1885 if (key->basic.ip_proto == IPPROTO_TCP && 1886 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1887 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1888 sizeof(key->tp.src)) || 1889 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1890 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1891 sizeof(key->tp.dst)) || 1892 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1893 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1894 sizeof(key->tcp.flags)))) 1895 goto nla_put_failure; 1896 else if (key->basic.ip_proto == IPPROTO_UDP && 1897 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1898 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1899 sizeof(key->tp.src)) || 1900 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1901 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1902 sizeof(key->tp.dst)))) 1903 goto nla_put_failure; 1904 else if (key->basic.ip_proto == IPPROTO_SCTP && 1905 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1906 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1907 sizeof(key->tp.src)) || 1908 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1909 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1910 sizeof(key->tp.dst)))) 1911 goto nla_put_failure; 1912 else if (key->basic.n_proto == htons(ETH_P_IP) && 1913 key->basic.ip_proto == IPPROTO_ICMP && 1914 (fl_dump_key_val(skb, &key->icmp.type, 1915 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1916 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1917 sizeof(key->icmp.type)) || 1918 fl_dump_key_val(skb, &key->icmp.code, 1919 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1920 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1921 sizeof(key->icmp.code)))) 1922 goto nla_put_failure; 1923 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1924 key->basic.ip_proto == IPPROTO_ICMPV6 && 1925 (fl_dump_key_val(skb, &key->icmp.type, 1926 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1927 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1928 sizeof(key->icmp.type)) || 1929 fl_dump_key_val(skb, &key->icmp.code, 1930 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1931 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1932 sizeof(key->icmp.code)))) 1933 goto nla_put_failure; 1934 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1935 key->basic.n_proto == htons(ETH_P_RARP)) && 1936 (fl_dump_key_val(skb, &key->arp.sip, 1937 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1938 TCA_FLOWER_KEY_ARP_SIP_MASK, 1939 sizeof(key->arp.sip)) || 1940 fl_dump_key_val(skb, &key->arp.tip, 1941 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1942 TCA_FLOWER_KEY_ARP_TIP_MASK, 1943 sizeof(key->arp.tip)) || 1944 fl_dump_key_val(skb, &key->arp.op, 1945 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1946 TCA_FLOWER_KEY_ARP_OP_MASK, 1947 sizeof(key->arp.op)) || 1948 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1949 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1950 sizeof(key->arp.sha)) || 1951 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1952 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1953 sizeof(key->arp.tha)))) 1954 goto nla_put_failure; 1955 1956 if ((key->basic.ip_proto == IPPROTO_TCP || 1957 key->basic.ip_proto == IPPROTO_UDP || 1958 key->basic.ip_proto == IPPROTO_SCTP) && 1959 fl_dump_key_port_range(skb, key, mask)) 1960 goto nla_put_failure; 1961 1962 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1963 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1964 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1965 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1966 sizeof(key->enc_ipv4.src)) || 1967 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1968 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1969 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1970 sizeof(key->enc_ipv4.dst)))) 1971 goto nla_put_failure; 1972 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1973 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1974 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1975 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1976 sizeof(key->enc_ipv6.src)) || 1977 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1978 TCA_FLOWER_KEY_ENC_IPV6_DST, 1979 &mask->enc_ipv6.dst, 1980 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1981 sizeof(key->enc_ipv6.dst)))) 1982 goto nla_put_failure; 1983 1984 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1985 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1986 sizeof(key->enc_key_id)) || 1987 fl_dump_key_val(skb, &key->enc_tp.src, 1988 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1989 &mask->enc_tp.src, 1990 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1991 sizeof(key->enc_tp.src)) || 1992 fl_dump_key_val(skb, &key->enc_tp.dst, 1993 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1994 &mask->enc_tp.dst, 1995 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1996 sizeof(key->enc_tp.dst)) || 1997 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 1998 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 1999 goto nla_put_failure; 2000 2001 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 2002 goto nla_put_failure; 2003 2004 return 0; 2005 2006 nla_put_failure: 2007 return -EMSGSIZE; 2008 } 2009 2010 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 2011 struct sk_buff *skb, struct tcmsg *t) 2012 { 2013 struct cls_fl_filter *f = fh; 2014 struct nlattr *nest; 2015 struct fl_flow_key *key, *mask; 2016 2017 if (!f) 2018 return skb->len; 2019 2020 t->tcm_handle = f->handle; 2021 2022 nest = nla_nest_start(skb, TCA_OPTIONS); 2023 if (!nest) 2024 goto nla_put_failure; 2025 2026 if (f->res.classid && 2027 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 2028 goto nla_put_failure; 2029 2030 key = &f->key; 2031 mask = &f->mask->key; 2032 2033 if (fl_dump_key(skb, net, key, mask)) 2034 goto nla_put_failure; 2035 2036 if (!tc_skip_hw(f->flags)) 2037 fl_hw_update_stats(tp, f); 2038 2039 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 2040 goto nla_put_failure; 2041 2042 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 2043 goto nla_put_failure; 2044 2045 if (tcf_exts_dump(skb, &f->exts)) 2046 goto nla_put_failure; 2047 2048 nla_nest_end(skb, nest); 2049 2050 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 2051 goto nla_put_failure; 2052 2053 return skb->len; 2054 2055 nla_put_failure: 2056 nla_nest_cancel(skb, nest); 2057 return -1; 2058 } 2059 2060 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 2061 { 2062 struct fl_flow_tmplt *tmplt = tmplt_priv; 2063 struct fl_flow_key *key, *mask; 2064 struct nlattr *nest; 2065 2066 nest = nla_nest_start(skb, TCA_OPTIONS); 2067 if (!nest) 2068 goto nla_put_failure; 2069 2070 key = &tmplt->dummy_key; 2071 mask = &tmplt->mask; 2072 2073 if (fl_dump_key(skb, net, key, mask)) 2074 goto nla_put_failure; 2075 2076 nla_nest_end(skb, nest); 2077 2078 return skb->len; 2079 2080 nla_put_failure: 2081 nla_nest_cancel(skb, nest); 2082 return -EMSGSIZE; 2083 } 2084 2085 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 2086 { 2087 struct cls_fl_filter *f = fh; 2088 2089 if (f && f->res.classid == classid) 2090 f->res.class = cl; 2091 } 2092 2093 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 2094 .kind = "flower", 2095 .classify = fl_classify, 2096 .init = fl_init, 2097 .destroy = fl_destroy, 2098 .get = fl_get, 2099 .change = fl_change, 2100 .delete = fl_delete, 2101 .walk = fl_walk, 2102 .reoffload = fl_reoffload, 2103 .dump = fl_dump, 2104 .bind_class = fl_bind_class, 2105 .tmplt_create = fl_tmplt_create, 2106 .tmplt_destroy = fl_tmplt_destroy, 2107 .tmplt_dump = fl_tmplt_dump, 2108 .owner = THIS_MODULE, 2109 }; 2110 2111 static int __init cls_fl_init(void) 2112 { 2113 return register_tcf_proto_ops(&cls_fl_ops); 2114 } 2115 2116 static void __exit cls_fl_exit(void) 2117 { 2118 unregister_tcf_proto_ops(&cls_fl_ops); 2119 } 2120 2121 module_init(cls_fl_init); 2122 module_exit(cls_fl_exit); 2123 2124 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 2125 MODULE_DESCRIPTION("Flower classifier"); 2126 MODULE_LICENSE("GPL v2"); 2127