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 28 #include <net/dst.h> 29 #include <net/dst_metadata.h> 30 31 struct fl_flow_key { 32 int indev_ifindex; 33 struct flow_dissector_key_control control; 34 struct flow_dissector_key_control enc_control; 35 struct flow_dissector_key_basic basic; 36 struct flow_dissector_key_eth_addrs eth; 37 struct flow_dissector_key_vlan vlan; 38 union { 39 struct flow_dissector_key_ipv4_addrs ipv4; 40 struct flow_dissector_key_ipv6_addrs ipv6; 41 }; 42 struct flow_dissector_key_ports tp; 43 struct flow_dissector_key_icmp icmp; 44 struct flow_dissector_key_arp arp; 45 struct flow_dissector_key_keyid enc_key_id; 46 union { 47 struct flow_dissector_key_ipv4_addrs enc_ipv4; 48 struct flow_dissector_key_ipv6_addrs enc_ipv6; 49 }; 50 struct flow_dissector_key_ports enc_tp; 51 struct flow_dissector_key_mpls mpls; 52 struct flow_dissector_key_tcp tcp; 53 struct flow_dissector_key_ip ip; 54 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 55 56 struct fl_flow_mask_range { 57 unsigned short int start; 58 unsigned short int end; 59 }; 60 61 struct fl_flow_mask { 62 struct fl_flow_key key; 63 struct fl_flow_mask_range range; 64 struct rcu_head rcu; 65 }; 66 67 struct cls_fl_head { 68 struct rhashtable ht; 69 struct fl_flow_mask mask; 70 struct flow_dissector dissector; 71 bool mask_assigned; 72 struct list_head filters; 73 struct rhashtable_params ht_params; 74 union { 75 struct work_struct work; 76 struct rcu_head rcu; 77 }; 78 struct idr handle_idr; 79 }; 80 81 struct cls_fl_filter { 82 struct rhash_head ht_node; 83 struct fl_flow_key mkey; 84 struct tcf_exts exts; 85 struct tcf_result res; 86 struct fl_flow_key key; 87 struct list_head list; 88 u32 handle; 89 u32 flags; 90 struct rcu_head rcu; 91 struct net_device *hw_dev; 92 }; 93 94 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 95 { 96 return mask->range.end - mask->range.start; 97 } 98 99 static void fl_mask_update_range(struct fl_flow_mask *mask) 100 { 101 const u8 *bytes = (const u8 *) &mask->key; 102 size_t size = sizeof(mask->key); 103 size_t i, first = 0, last = size - 1; 104 105 for (i = 0; i < sizeof(mask->key); i++) { 106 if (bytes[i]) { 107 if (!first && i) 108 first = i; 109 last = i; 110 } 111 } 112 mask->range.start = rounddown(first, sizeof(long)); 113 mask->range.end = roundup(last + 1, sizeof(long)); 114 } 115 116 static void *fl_key_get_start(struct fl_flow_key *key, 117 const struct fl_flow_mask *mask) 118 { 119 return (u8 *) key + mask->range.start; 120 } 121 122 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 123 struct fl_flow_mask *mask) 124 { 125 const long *lkey = fl_key_get_start(key, mask); 126 const long *lmask = fl_key_get_start(&mask->key, mask); 127 long *lmkey = fl_key_get_start(mkey, mask); 128 int i; 129 130 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 131 *lmkey++ = *lkey++ & *lmask++; 132 } 133 134 static void fl_clear_masked_range(struct fl_flow_key *key, 135 struct fl_flow_mask *mask) 136 { 137 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 138 } 139 140 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head, 141 struct fl_flow_key *mkey) 142 { 143 return rhashtable_lookup_fast(&head->ht, 144 fl_key_get_start(mkey, &head->mask), 145 head->ht_params); 146 } 147 148 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 149 struct tcf_result *res) 150 { 151 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 152 struct cls_fl_filter *f; 153 struct fl_flow_key skb_key; 154 struct fl_flow_key skb_mkey; 155 156 if (!atomic_read(&head->ht.nelems)) 157 return -1; 158 159 fl_clear_masked_range(&skb_key, &head->mask); 160 161 skb_key.indev_ifindex = skb->skb_iif; 162 /* skb_flow_dissect() does not set n_proto in case an unknown protocol, 163 * so do it rather here. 164 */ 165 skb_key.basic.n_proto = skb->protocol; 166 skb_flow_dissect(skb, &head->dissector, &skb_key, 0); 167 168 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); 169 170 f = fl_lookup(head, &skb_mkey); 171 if (f && !tc_skip_sw(f->flags)) { 172 *res = f->res; 173 return tcf_exts_exec(skb, &f->exts, res); 174 } 175 return -1; 176 } 177 178 static int fl_init(struct tcf_proto *tp) 179 { 180 struct cls_fl_head *head; 181 182 head = kzalloc(sizeof(*head), GFP_KERNEL); 183 if (!head) 184 return -ENOBUFS; 185 186 INIT_LIST_HEAD_RCU(&head->filters); 187 rcu_assign_pointer(tp->root, head); 188 idr_init(&head->handle_idr); 189 190 return 0; 191 } 192 193 static void fl_destroy_filter(struct rcu_head *head) 194 { 195 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); 196 197 tcf_exts_destroy(&f->exts); 198 kfree(f); 199 } 200 201 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) 202 { 203 struct tc_cls_flower_offload cls_flower = {}; 204 struct net_device *dev = f->hw_dev; 205 206 if (!tc_can_offload(dev)) 207 return; 208 209 tc_cls_common_offload_init(&cls_flower.common, tp); 210 cls_flower.command = TC_CLSFLOWER_DESTROY; 211 cls_flower.cookie = (unsigned long) f; 212 213 dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, &cls_flower); 214 } 215 216 static int fl_hw_replace_filter(struct tcf_proto *tp, 217 struct flow_dissector *dissector, 218 struct fl_flow_key *mask, 219 struct cls_fl_filter *f) 220 { 221 struct net_device *dev = tp->q->dev_queue->dev; 222 struct tc_cls_flower_offload cls_flower = {}; 223 int err; 224 225 if (!tc_can_offload(dev)) { 226 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || 227 (f->hw_dev && !tc_can_offload(f->hw_dev))) { 228 f->hw_dev = dev; 229 return tc_skip_sw(f->flags) ? -EINVAL : 0; 230 } 231 dev = f->hw_dev; 232 cls_flower.egress_dev = true; 233 } else { 234 f->hw_dev = dev; 235 } 236 237 tc_cls_common_offload_init(&cls_flower.common, tp); 238 cls_flower.command = TC_CLSFLOWER_REPLACE; 239 cls_flower.cookie = (unsigned long) f; 240 cls_flower.dissector = dissector; 241 cls_flower.mask = mask; 242 cls_flower.key = &f->mkey; 243 cls_flower.exts = &f->exts; 244 245 err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, 246 &cls_flower); 247 if (!err) 248 f->flags |= TCA_CLS_FLAGS_IN_HW; 249 250 if (tc_skip_sw(f->flags)) 251 return err; 252 return 0; 253 } 254 255 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 256 { 257 struct tc_cls_flower_offload cls_flower = {}; 258 struct net_device *dev = f->hw_dev; 259 260 if (!tc_can_offload(dev)) 261 return; 262 263 tc_cls_common_offload_init(&cls_flower.common, tp); 264 cls_flower.command = TC_CLSFLOWER_STATS; 265 cls_flower.cookie = (unsigned long) f; 266 cls_flower.exts = &f->exts; 267 268 dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, 269 &cls_flower); 270 } 271 272 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) 273 { 274 struct cls_fl_head *head = rtnl_dereference(tp->root); 275 276 idr_remove_ext(&head->handle_idr, f->handle); 277 list_del_rcu(&f->list); 278 if (!tc_skip_hw(f->flags)) 279 fl_hw_destroy_filter(tp, f); 280 tcf_unbind_filter(tp, &f->res); 281 call_rcu(&f->rcu, fl_destroy_filter); 282 } 283 284 static void fl_destroy_sleepable(struct work_struct *work) 285 { 286 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 287 work); 288 if (head->mask_assigned) 289 rhashtable_destroy(&head->ht); 290 kfree(head); 291 module_put(THIS_MODULE); 292 } 293 294 static void fl_destroy_rcu(struct rcu_head *rcu) 295 { 296 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 297 298 INIT_WORK(&head->work, fl_destroy_sleepable); 299 schedule_work(&head->work); 300 } 301 302 static void fl_destroy(struct tcf_proto *tp) 303 { 304 struct cls_fl_head *head = rtnl_dereference(tp->root); 305 struct cls_fl_filter *f, *next; 306 307 list_for_each_entry_safe(f, next, &head->filters, list) 308 __fl_delete(tp, f); 309 idr_destroy(&head->handle_idr); 310 311 __module_get(THIS_MODULE); 312 call_rcu(&head->rcu, fl_destroy_rcu); 313 } 314 315 static void *fl_get(struct tcf_proto *tp, u32 handle) 316 { 317 struct cls_fl_head *head = rtnl_dereference(tp->root); 318 319 return idr_find_ext(&head->handle_idr, handle); 320 } 321 322 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 323 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 324 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 325 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 326 .len = IFNAMSIZ }, 327 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 328 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 329 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 330 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 331 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 332 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 333 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 334 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 335 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 336 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 337 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 338 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 339 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 340 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 341 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 342 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 343 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 344 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 345 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 346 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 347 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 348 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 349 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 350 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 351 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 352 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 353 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 354 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 355 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 356 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 357 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 358 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 359 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 360 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 361 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 362 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 363 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 364 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 365 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 366 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 367 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 368 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 369 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 370 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 371 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 372 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 373 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 374 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 375 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 376 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 377 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 378 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 379 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 380 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 381 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 382 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 383 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 384 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 385 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 386 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 387 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 388 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 389 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 390 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 391 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 392 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 393 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 394 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 395 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 396 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 397 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 398 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 399 }; 400 401 static void fl_set_key_val(struct nlattr **tb, 402 void *val, int val_type, 403 void *mask, int mask_type, int len) 404 { 405 if (!tb[val_type]) 406 return; 407 memcpy(val, nla_data(tb[val_type]), len); 408 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 409 memset(mask, 0xff, len); 410 else 411 memcpy(mask, nla_data(tb[mask_type]), len); 412 } 413 414 static int fl_set_key_mpls(struct nlattr **tb, 415 struct flow_dissector_key_mpls *key_val, 416 struct flow_dissector_key_mpls *key_mask) 417 { 418 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 419 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 420 key_mask->mpls_ttl = MPLS_TTL_MASK; 421 } 422 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 423 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 424 425 if (bos & ~MPLS_BOS_MASK) 426 return -EINVAL; 427 key_val->mpls_bos = bos; 428 key_mask->mpls_bos = MPLS_BOS_MASK; 429 } 430 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 431 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 432 433 if (tc & ~MPLS_TC_MASK) 434 return -EINVAL; 435 key_val->mpls_tc = tc; 436 key_mask->mpls_tc = MPLS_TC_MASK; 437 } 438 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 439 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 440 441 if (label & ~MPLS_LABEL_MASK) 442 return -EINVAL; 443 key_val->mpls_label = label; 444 key_mask->mpls_label = MPLS_LABEL_MASK; 445 } 446 return 0; 447 } 448 449 static void fl_set_key_vlan(struct nlattr **tb, 450 struct flow_dissector_key_vlan *key_val, 451 struct flow_dissector_key_vlan *key_mask) 452 { 453 #define VLAN_PRIORITY_MASK 0x7 454 455 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 456 key_val->vlan_id = 457 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 458 key_mask->vlan_id = VLAN_VID_MASK; 459 } 460 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 461 key_val->vlan_priority = 462 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 463 VLAN_PRIORITY_MASK; 464 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 465 } 466 } 467 468 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 469 u32 *dissector_key, u32 *dissector_mask, 470 u32 flower_flag_bit, u32 dissector_flag_bit) 471 { 472 if (flower_mask & flower_flag_bit) { 473 *dissector_mask |= dissector_flag_bit; 474 if (flower_key & flower_flag_bit) 475 *dissector_key |= dissector_flag_bit; 476 } 477 } 478 479 static int fl_set_key_flags(struct nlattr **tb, 480 u32 *flags_key, u32 *flags_mask) 481 { 482 u32 key, mask; 483 484 /* mask is mandatory for flags */ 485 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 486 return -EINVAL; 487 488 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 489 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 490 491 *flags_key = 0; 492 *flags_mask = 0; 493 494 fl_set_key_flag(key, mask, flags_key, flags_mask, 495 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 496 497 return 0; 498 } 499 500 static void fl_set_key_ip(struct nlattr **tb, 501 struct flow_dissector_key_ip *key, 502 struct flow_dissector_key_ip *mask) 503 { 504 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS, 505 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK, 506 sizeof(key->tos)); 507 508 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, 509 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK, 510 sizeof(key->ttl)); 511 } 512 513 static int fl_set_key(struct net *net, struct nlattr **tb, 514 struct fl_flow_key *key, struct fl_flow_key *mask) 515 { 516 __be16 ethertype; 517 int ret = 0; 518 #ifdef CONFIG_NET_CLS_IND 519 if (tb[TCA_FLOWER_INDEV]) { 520 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); 521 if (err < 0) 522 return err; 523 key->indev_ifindex = err; 524 mask->indev_ifindex = 0xffffffff; 525 } 526 #endif 527 528 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 529 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 530 sizeof(key->eth.dst)); 531 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 532 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 533 sizeof(key->eth.src)); 534 535 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 536 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 537 538 if (ethertype == htons(ETH_P_8021Q)) { 539 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 540 fl_set_key_val(tb, &key->basic.n_proto, 541 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 542 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 543 sizeof(key->basic.n_proto)); 544 } else { 545 key->basic.n_proto = ethertype; 546 mask->basic.n_proto = cpu_to_be16(~0); 547 } 548 } 549 550 if (key->basic.n_proto == htons(ETH_P_IP) || 551 key->basic.n_proto == htons(ETH_P_IPV6)) { 552 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 553 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 554 sizeof(key->basic.ip_proto)); 555 fl_set_key_ip(tb, &key->ip, &mask->ip); 556 } 557 558 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 559 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 560 mask->control.addr_type = ~0; 561 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 562 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 563 sizeof(key->ipv4.src)); 564 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 565 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 566 sizeof(key->ipv4.dst)); 567 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 568 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 569 mask->control.addr_type = ~0; 570 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 571 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 572 sizeof(key->ipv6.src)); 573 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 574 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 575 sizeof(key->ipv6.dst)); 576 } 577 578 if (key->basic.ip_proto == IPPROTO_TCP) { 579 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 580 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 581 sizeof(key->tp.src)); 582 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 583 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 584 sizeof(key->tp.dst)); 585 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 586 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 587 sizeof(key->tcp.flags)); 588 } else if (key->basic.ip_proto == IPPROTO_UDP) { 589 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 590 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 591 sizeof(key->tp.src)); 592 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 593 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 594 sizeof(key->tp.dst)); 595 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 596 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 597 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 598 sizeof(key->tp.src)); 599 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 600 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 601 sizeof(key->tp.dst)); 602 } else if (key->basic.n_proto == htons(ETH_P_IP) && 603 key->basic.ip_proto == IPPROTO_ICMP) { 604 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 605 &mask->icmp.type, 606 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 607 sizeof(key->icmp.type)); 608 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 609 &mask->icmp.code, 610 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 611 sizeof(key->icmp.code)); 612 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 613 key->basic.ip_proto == IPPROTO_ICMPV6) { 614 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 615 &mask->icmp.type, 616 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 617 sizeof(key->icmp.type)); 618 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 619 &mask->icmp.code, 620 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 621 sizeof(key->icmp.code)); 622 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 623 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 624 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 625 if (ret) 626 return ret; 627 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 628 key->basic.n_proto == htons(ETH_P_RARP)) { 629 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 630 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 631 sizeof(key->arp.sip)); 632 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 633 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 634 sizeof(key->arp.tip)); 635 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 636 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 637 sizeof(key->arp.op)); 638 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 639 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 640 sizeof(key->arp.sha)); 641 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 642 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 643 sizeof(key->arp.tha)); 644 } 645 646 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 647 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 648 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 649 mask->enc_control.addr_type = ~0; 650 fl_set_key_val(tb, &key->enc_ipv4.src, 651 TCA_FLOWER_KEY_ENC_IPV4_SRC, 652 &mask->enc_ipv4.src, 653 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 654 sizeof(key->enc_ipv4.src)); 655 fl_set_key_val(tb, &key->enc_ipv4.dst, 656 TCA_FLOWER_KEY_ENC_IPV4_DST, 657 &mask->enc_ipv4.dst, 658 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 659 sizeof(key->enc_ipv4.dst)); 660 } 661 662 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 663 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 664 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 665 mask->enc_control.addr_type = ~0; 666 fl_set_key_val(tb, &key->enc_ipv6.src, 667 TCA_FLOWER_KEY_ENC_IPV6_SRC, 668 &mask->enc_ipv6.src, 669 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 670 sizeof(key->enc_ipv6.src)); 671 fl_set_key_val(tb, &key->enc_ipv6.dst, 672 TCA_FLOWER_KEY_ENC_IPV6_DST, 673 &mask->enc_ipv6.dst, 674 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 675 sizeof(key->enc_ipv6.dst)); 676 } 677 678 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 679 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 680 sizeof(key->enc_key_id.keyid)); 681 682 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 683 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 684 sizeof(key->enc_tp.src)); 685 686 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 687 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 688 sizeof(key->enc_tp.dst)); 689 690 if (tb[TCA_FLOWER_KEY_FLAGS]) 691 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 692 693 return ret; 694 } 695 696 static bool fl_mask_eq(struct fl_flow_mask *mask1, 697 struct fl_flow_mask *mask2) 698 { 699 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 700 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 701 702 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 703 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 704 } 705 706 static const struct rhashtable_params fl_ht_params = { 707 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 708 .head_offset = offsetof(struct cls_fl_filter, ht_node), 709 .automatic_shrinking = true, 710 }; 711 712 static int fl_init_hashtable(struct cls_fl_head *head, 713 struct fl_flow_mask *mask) 714 { 715 head->ht_params = fl_ht_params; 716 head->ht_params.key_len = fl_mask_range(mask); 717 head->ht_params.key_offset += mask->range.start; 718 719 return rhashtable_init(&head->ht, &head->ht_params); 720 } 721 722 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 723 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 724 725 #define FL_KEY_IS_MASKED(mask, member) \ 726 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 727 0, FL_KEY_MEMBER_SIZE(member)) \ 728 729 #define FL_KEY_SET(keys, cnt, id, member) \ 730 do { \ 731 keys[cnt].key_id = id; \ 732 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 733 cnt++; \ 734 } while(0); 735 736 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 737 do { \ 738 if (FL_KEY_IS_MASKED(mask, member)) \ 739 FL_KEY_SET(keys, cnt, id, member); \ 740 } while(0); 741 742 static void fl_init_dissector(struct cls_fl_head *head, 743 struct fl_flow_mask *mask) 744 { 745 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 746 size_t cnt = 0; 747 748 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 749 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 750 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 751 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 752 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 753 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 754 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 755 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 756 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 757 FLOW_DISSECTOR_KEY_PORTS, tp); 758 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 759 FLOW_DISSECTOR_KEY_IP, ip); 760 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 761 FLOW_DISSECTOR_KEY_TCP, tcp); 762 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 763 FLOW_DISSECTOR_KEY_ICMP, icmp); 764 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 765 FLOW_DISSECTOR_KEY_ARP, arp); 766 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 767 FLOW_DISSECTOR_KEY_MPLS, mpls); 768 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 769 FLOW_DISSECTOR_KEY_VLAN, vlan); 770 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 771 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 772 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 773 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 774 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 775 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 776 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 777 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 778 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 779 enc_control); 780 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 781 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 782 783 skb_flow_dissector_init(&head->dissector, keys, cnt); 784 } 785 786 static int fl_check_assign_mask(struct cls_fl_head *head, 787 struct fl_flow_mask *mask) 788 { 789 int err; 790 791 if (head->mask_assigned) { 792 if (!fl_mask_eq(&head->mask, mask)) 793 return -EINVAL; 794 else 795 return 0; 796 } 797 798 /* Mask is not assigned yet. So assign it and init hashtable 799 * according to that. 800 */ 801 err = fl_init_hashtable(head, mask); 802 if (err) 803 return err; 804 memcpy(&head->mask, mask, sizeof(head->mask)); 805 head->mask_assigned = true; 806 807 fl_init_dissector(head, mask); 808 809 return 0; 810 } 811 812 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 813 struct cls_fl_filter *f, struct fl_flow_mask *mask, 814 unsigned long base, struct nlattr **tb, 815 struct nlattr *est, bool ovr) 816 { 817 int err; 818 819 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr); 820 if (err < 0) 821 return err; 822 823 if (tb[TCA_FLOWER_CLASSID]) { 824 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 825 tcf_bind_filter(tp, &f->res, base); 826 } 827 828 err = fl_set_key(net, tb, &f->key, &mask->key); 829 if (err) 830 return err; 831 832 fl_mask_update_range(mask); 833 fl_set_masked_key(&f->mkey, &f->key, mask); 834 835 return 0; 836 } 837 838 static int fl_change(struct net *net, struct sk_buff *in_skb, 839 struct tcf_proto *tp, unsigned long base, 840 u32 handle, struct nlattr **tca, 841 void **arg, bool ovr) 842 { 843 struct cls_fl_head *head = rtnl_dereference(tp->root); 844 struct cls_fl_filter *fold = *arg; 845 struct cls_fl_filter *fnew; 846 struct nlattr **tb; 847 struct fl_flow_mask mask = {}; 848 unsigned long idr_index; 849 int err; 850 851 if (!tca[TCA_OPTIONS]) 852 return -EINVAL; 853 854 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 855 if (!tb) 856 return -ENOBUFS; 857 858 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 859 fl_policy, NULL); 860 if (err < 0) 861 goto errout_tb; 862 863 if (fold && handle && fold->handle != handle) { 864 err = -EINVAL; 865 goto errout_tb; 866 } 867 868 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 869 if (!fnew) { 870 err = -ENOBUFS; 871 goto errout_tb; 872 } 873 874 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 875 if (err < 0) 876 goto errout; 877 878 if (!handle) { 879 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index, 880 1, 0x80000000, GFP_KERNEL); 881 if (err) 882 goto errout; 883 fnew->handle = idr_index; 884 } 885 886 /* user specifies a handle and it doesn't exist */ 887 if (handle && !fold) { 888 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index, 889 handle, handle + 1, GFP_KERNEL); 890 if (err) 891 goto errout; 892 fnew->handle = idr_index; 893 } 894 895 if (tb[TCA_FLOWER_FLAGS]) { 896 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 897 898 if (!tc_flags_valid(fnew->flags)) { 899 err = -EINVAL; 900 goto errout_idr; 901 } 902 } 903 904 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 905 if (err) 906 goto errout_idr; 907 908 err = fl_check_assign_mask(head, &mask); 909 if (err) 910 goto errout_idr; 911 912 if (!tc_skip_sw(fnew->flags)) { 913 if (!fold && fl_lookup(head, &fnew->mkey)) { 914 err = -EEXIST; 915 goto errout_idr; 916 } 917 918 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 919 head->ht_params); 920 if (err) 921 goto errout_idr; 922 } 923 924 if (!tc_skip_hw(fnew->flags)) { 925 err = fl_hw_replace_filter(tp, 926 &head->dissector, 927 &mask.key, 928 fnew); 929 if (err) 930 goto errout_idr; 931 } 932 933 if (!tc_in_hw(fnew->flags)) 934 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 935 936 if (fold) { 937 if (!tc_skip_sw(fold->flags)) 938 rhashtable_remove_fast(&head->ht, &fold->ht_node, 939 head->ht_params); 940 if (!tc_skip_hw(fold->flags)) 941 fl_hw_destroy_filter(tp, fold); 942 } 943 944 *arg = fnew; 945 946 if (fold) { 947 fnew->handle = handle; 948 idr_replace_ext(&head->handle_idr, fnew, fnew->handle); 949 list_replace_rcu(&fold->list, &fnew->list); 950 tcf_unbind_filter(tp, &fold->res); 951 call_rcu(&fold->rcu, fl_destroy_filter); 952 } else { 953 list_add_tail_rcu(&fnew->list, &head->filters); 954 } 955 956 kfree(tb); 957 return 0; 958 959 errout_idr: 960 if (fnew->handle) 961 idr_remove_ext(&head->handle_idr, fnew->handle); 962 errout: 963 tcf_exts_destroy(&fnew->exts); 964 kfree(fnew); 965 errout_tb: 966 kfree(tb); 967 return err; 968 } 969 970 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last) 971 { 972 struct cls_fl_head *head = rtnl_dereference(tp->root); 973 struct cls_fl_filter *f = arg; 974 975 if (!tc_skip_sw(f->flags)) 976 rhashtable_remove_fast(&head->ht, &f->ht_node, 977 head->ht_params); 978 __fl_delete(tp, f); 979 *last = list_empty(&head->filters); 980 return 0; 981 } 982 983 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 984 { 985 struct cls_fl_head *head = rtnl_dereference(tp->root); 986 struct cls_fl_filter *f; 987 988 list_for_each_entry_rcu(f, &head->filters, list) { 989 if (arg->count < arg->skip) 990 goto skip; 991 if (arg->fn(tp, f, arg) < 0) { 992 arg->stop = 1; 993 break; 994 } 995 skip: 996 arg->count++; 997 } 998 } 999 1000 static int fl_dump_key_val(struct sk_buff *skb, 1001 void *val, int val_type, 1002 void *mask, int mask_type, int len) 1003 { 1004 int err; 1005 1006 if (!memchr_inv(mask, 0, len)) 1007 return 0; 1008 err = nla_put(skb, val_type, len, val); 1009 if (err) 1010 return err; 1011 if (mask_type != TCA_FLOWER_UNSPEC) { 1012 err = nla_put(skb, mask_type, len, mask); 1013 if (err) 1014 return err; 1015 } 1016 return 0; 1017 } 1018 1019 static int fl_dump_key_mpls(struct sk_buff *skb, 1020 struct flow_dissector_key_mpls *mpls_key, 1021 struct flow_dissector_key_mpls *mpls_mask) 1022 { 1023 int err; 1024 1025 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1026 return 0; 1027 if (mpls_mask->mpls_ttl) { 1028 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1029 mpls_key->mpls_ttl); 1030 if (err) 1031 return err; 1032 } 1033 if (mpls_mask->mpls_tc) { 1034 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1035 mpls_key->mpls_tc); 1036 if (err) 1037 return err; 1038 } 1039 if (mpls_mask->mpls_label) { 1040 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1041 mpls_key->mpls_label); 1042 if (err) 1043 return err; 1044 } 1045 if (mpls_mask->mpls_bos) { 1046 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1047 mpls_key->mpls_bos); 1048 if (err) 1049 return err; 1050 } 1051 return 0; 1052 } 1053 1054 static int fl_dump_key_ip(struct sk_buff *skb, 1055 struct flow_dissector_key_ip *key, 1056 struct flow_dissector_key_ip *mask) 1057 { 1058 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos, 1059 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) || 1060 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl, 1061 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl))) 1062 return -1; 1063 1064 return 0; 1065 } 1066 1067 static int fl_dump_key_vlan(struct sk_buff *skb, 1068 struct flow_dissector_key_vlan *vlan_key, 1069 struct flow_dissector_key_vlan *vlan_mask) 1070 { 1071 int err; 1072 1073 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1074 return 0; 1075 if (vlan_mask->vlan_id) { 1076 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 1077 vlan_key->vlan_id); 1078 if (err) 1079 return err; 1080 } 1081 if (vlan_mask->vlan_priority) { 1082 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 1083 vlan_key->vlan_priority); 1084 if (err) 1085 return err; 1086 } 1087 return 0; 1088 } 1089 1090 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1091 u32 *flower_key, u32 *flower_mask, 1092 u32 flower_flag_bit, u32 dissector_flag_bit) 1093 { 1094 if (dissector_mask & dissector_flag_bit) { 1095 *flower_mask |= flower_flag_bit; 1096 if (dissector_key & dissector_flag_bit) 1097 *flower_key |= flower_flag_bit; 1098 } 1099 } 1100 1101 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1102 { 1103 u32 key, mask; 1104 __be32 _key, _mask; 1105 int err; 1106 1107 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1108 return 0; 1109 1110 key = 0; 1111 mask = 0; 1112 1113 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1114 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1115 1116 _key = cpu_to_be32(key); 1117 _mask = cpu_to_be32(mask); 1118 1119 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1120 if (err) 1121 return err; 1122 1123 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1124 } 1125 1126 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1127 struct sk_buff *skb, struct tcmsg *t) 1128 { 1129 struct cls_fl_head *head = rtnl_dereference(tp->root); 1130 struct cls_fl_filter *f = fh; 1131 struct nlattr *nest; 1132 struct fl_flow_key *key, *mask; 1133 1134 if (!f) 1135 return skb->len; 1136 1137 t->tcm_handle = f->handle; 1138 1139 nest = nla_nest_start(skb, TCA_OPTIONS); 1140 if (!nest) 1141 goto nla_put_failure; 1142 1143 if (f->res.classid && 1144 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1145 goto nla_put_failure; 1146 1147 key = &f->key; 1148 mask = &head->mask.key; 1149 1150 if (mask->indev_ifindex) { 1151 struct net_device *dev; 1152 1153 dev = __dev_get_by_index(net, key->indev_ifindex); 1154 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1155 goto nla_put_failure; 1156 } 1157 1158 if (!tc_skip_hw(f->flags)) 1159 fl_hw_update_stats(tp, f); 1160 1161 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1162 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1163 sizeof(key->eth.dst)) || 1164 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1165 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1166 sizeof(key->eth.src)) || 1167 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1168 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1169 sizeof(key->basic.n_proto))) 1170 goto nla_put_failure; 1171 1172 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1173 goto nla_put_failure; 1174 1175 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1176 goto nla_put_failure; 1177 1178 if ((key->basic.n_proto == htons(ETH_P_IP) || 1179 key->basic.n_proto == htons(ETH_P_IPV6)) && 1180 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1181 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1182 sizeof(key->basic.ip_proto)) || 1183 fl_dump_key_ip(skb, &key->ip, &mask->ip))) 1184 goto nla_put_failure; 1185 1186 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1187 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1188 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1189 sizeof(key->ipv4.src)) || 1190 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1191 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1192 sizeof(key->ipv4.dst)))) 1193 goto nla_put_failure; 1194 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1195 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1196 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1197 sizeof(key->ipv6.src)) || 1198 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1199 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1200 sizeof(key->ipv6.dst)))) 1201 goto nla_put_failure; 1202 1203 if (key->basic.ip_proto == IPPROTO_TCP && 1204 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1205 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1206 sizeof(key->tp.src)) || 1207 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1208 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1209 sizeof(key->tp.dst)) || 1210 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1211 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1212 sizeof(key->tcp.flags)))) 1213 goto nla_put_failure; 1214 else if (key->basic.ip_proto == IPPROTO_UDP && 1215 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1216 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1217 sizeof(key->tp.src)) || 1218 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1219 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1220 sizeof(key->tp.dst)))) 1221 goto nla_put_failure; 1222 else if (key->basic.ip_proto == IPPROTO_SCTP && 1223 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1224 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1225 sizeof(key->tp.src)) || 1226 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1227 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1228 sizeof(key->tp.dst)))) 1229 goto nla_put_failure; 1230 else if (key->basic.n_proto == htons(ETH_P_IP) && 1231 key->basic.ip_proto == IPPROTO_ICMP && 1232 (fl_dump_key_val(skb, &key->icmp.type, 1233 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1234 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1235 sizeof(key->icmp.type)) || 1236 fl_dump_key_val(skb, &key->icmp.code, 1237 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1238 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1239 sizeof(key->icmp.code)))) 1240 goto nla_put_failure; 1241 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1242 key->basic.ip_proto == IPPROTO_ICMPV6 && 1243 (fl_dump_key_val(skb, &key->icmp.type, 1244 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1245 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1246 sizeof(key->icmp.type)) || 1247 fl_dump_key_val(skb, &key->icmp.code, 1248 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1249 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1250 sizeof(key->icmp.code)))) 1251 goto nla_put_failure; 1252 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1253 key->basic.n_proto == htons(ETH_P_RARP)) && 1254 (fl_dump_key_val(skb, &key->arp.sip, 1255 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1256 TCA_FLOWER_KEY_ARP_SIP_MASK, 1257 sizeof(key->arp.sip)) || 1258 fl_dump_key_val(skb, &key->arp.tip, 1259 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1260 TCA_FLOWER_KEY_ARP_TIP_MASK, 1261 sizeof(key->arp.tip)) || 1262 fl_dump_key_val(skb, &key->arp.op, 1263 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1264 TCA_FLOWER_KEY_ARP_OP_MASK, 1265 sizeof(key->arp.op)) || 1266 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1267 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1268 sizeof(key->arp.sha)) || 1269 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1270 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1271 sizeof(key->arp.tha)))) 1272 goto nla_put_failure; 1273 1274 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1275 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1276 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1277 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1278 sizeof(key->enc_ipv4.src)) || 1279 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1280 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1281 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1282 sizeof(key->enc_ipv4.dst)))) 1283 goto nla_put_failure; 1284 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1285 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1286 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1287 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1288 sizeof(key->enc_ipv6.src)) || 1289 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1290 TCA_FLOWER_KEY_ENC_IPV6_DST, 1291 &mask->enc_ipv6.dst, 1292 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1293 sizeof(key->enc_ipv6.dst)))) 1294 goto nla_put_failure; 1295 1296 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1297 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1298 sizeof(key->enc_key_id)) || 1299 fl_dump_key_val(skb, &key->enc_tp.src, 1300 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1301 &mask->enc_tp.src, 1302 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1303 sizeof(key->enc_tp.src)) || 1304 fl_dump_key_val(skb, &key->enc_tp.dst, 1305 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1306 &mask->enc_tp.dst, 1307 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1308 sizeof(key->enc_tp.dst))) 1309 goto nla_put_failure; 1310 1311 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1312 goto nla_put_failure; 1313 1314 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1315 goto nla_put_failure; 1316 1317 if (tcf_exts_dump(skb, &f->exts)) 1318 goto nla_put_failure; 1319 1320 nla_nest_end(skb, nest); 1321 1322 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1323 goto nla_put_failure; 1324 1325 return skb->len; 1326 1327 nla_put_failure: 1328 nla_nest_cancel(skb, nest); 1329 return -1; 1330 } 1331 1332 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1333 { 1334 struct cls_fl_filter *f = fh; 1335 1336 if (f && f->res.classid == classid) 1337 f->res.class = cl; 1338 } 1339 1340 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1341 .kind = "flower", 1342 .classify = fl_classify, 1343 .init = fl_init, 1344 .destroy = fl_destroy, 1345 .get = fl_get, 1346 .change = fl_change, 1347 .delete = fl_delete, 1348 .walk = fl_walk, 1349 .dump = fl_dump, 1350 .bind_class = fl_bind_class, 1351 .owner = THIS_MODULE, 1352 }; 1353 1354 static int __init cls_fl_init(void) 1355 { 1356 return register_tcf_proto_ops(&cls_fl_ops); 1357 } 1358 1359 static void __exit cls_fl_exit(void) 1360 { 1361 unregister_tcf_proto_ops(&cls_fl_ops); 1362 } 1363 1364 module_init(cls_fl_init); 1365 module_exit(cls_fl_exit); 1366 1367 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1368 MODULE_DESCRIPTION("Flower classifier"); 1369 MODULE_LICENSE("GPL v2"); 1370