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 struct ip_tunnel_info *info; 156 157 if (!atomic_read(&head->ht.nelems)) 158 return -1; 159 160 fl_clear_masked_range(&skb_key, &head->mask); 161 162 info = skb_tunnel_info(skb); 163 if (info) { 164 struct ip_tunnel_key *key = &info->key; 165 166 switch (ip_tunnel_info_af(info)) { 167 case AF_INET: 168 skb_key.enc_control.addr_type = 169 FLOW_DISSECTOR_KEY_IPV4_ADDRS; 170 skb_key.enc_ipv4.src = key->u.ipv4.src; 171 skb_key.enc_ipv4.dst = key->u.ipv4.dst; 172 break; 173 case AF_INET6: 174 skb_key.enc_control.addr_type = 175 FLOW_DISSECTOR_KEY_IPV6_ADDRS; 176 skb_key.enc_ipv6.src = key->u.ipv6.src; 177 skb_key.enc_ipv6.dst = key->u.ipv6.dst; 178 break; 179 } 180 181 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); 182 skb_key.enc_tp.src = key->tp_src; 183 skb_key.enc_tp.dst = key->tp_dst; 184 } 185 186 skb_key.indev_ifindex = skb->skb_iif; 187 /* skb_flow_dissect() does not set n_proto in case an unknown protocol, 188 * so do it rather here. 189 */ 190 skb_key.basic.n_proto = skb->protocol; 191 skb_flow_dissect(skb, &head->dissector, &skb_key, 0); 192 193 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); 194 195 f = fl_lookup(head, &skb_mkey); 196 if (f && !tc_skip_sw(f->flags)) { 197 *res = f->res; 198 return tcf_exts_exec(skb, &f->exts, res); 199 } 200 return -1; 201 } 202 203 static int fl_init(struct tcf_proto *tp) 204 { 205 struct cls_fl_head *head; 206 207 head = kzalloc(sizeof(*head), GFP_KERNEL); 208 if (!head) 209 return -ENOBUFS; 210 211 INIT_LIST_HEAD_RCU(&head->filters); 212 rcu_assign_pointer(tp->root, head); 213 idr_init(&head->handle_idr); 214 215 return 0; 216 } 217 218 static void fl_destroy_filter(struct rcu_head *head) 219 { 220 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); 221 222 tcf_exts_destroy(&f->exts); 223 kfree(f); 224 } 225 226 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) 227 { 228 struct tc_cls_flower_offload cls_flower = {}; 229 struct net_device *dev = f->hw_dev; 230 231 if (!tc_can_offload(dev)) 232 return; 233 234 tc_cls_common_offload_init(&cls_flower.common, tp); 235 cls_flower.command = TC_CLSFLOWER_DESTROY; 236 cls_flower.cookie = (unsigned long) f; 237 238 dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, &cls_flower); 239 } 240 241 static int fl_hw_replace_filter(struct tcf_proto *tp, 242 struct flow_dissector *dissector, 243 struct fl_flow_key *mask, 244 struct cls_fl_filter *f) 245 { 246 struct net_device *dev = tp->q->dev_queue->dev; 247 struct tc_cls_flower_offload cls_flower = {}; 248 int err; 249 250 if (!tc_can_offload(dev)) { 251 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || 252 (f->hw_dev && !tc_can_offload(f->hw_dev))) { 253 f->hw_dev = dev; 254 return tc_skip_sw(f->flags) ? -EINVAL : 0; 255 } 256 dev = f->hw_dev; 257 cls_flower.egress_dev = true; 258 } else { 259 f->hw_dev = dev; 260 } 261 262 tc_cls_common_offload_init(&cls_flower.common, tp); 263 cls_flower.command = TC_CLSFLOWER_REPLACE; 264 cls_flower.cookie = (unsigned long) f; 265 cls_flower.dissector = dissector; 266 cls_flower.mask = mask; 267 cls_flower.key = &f->mkey; 268 cls_flower.exts = &f->exts; 269 270 err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, 271 &cls_flower); 272 if (!err) 273 f->flags |= TCA_CLS_FLAGS_IN_HW; 274 275 if (tc_skip_sw(f->flags)) 276 return err; 277 return 0; 278 } 279 280 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 281 { 282 struct tc_cls_flower_offload cls_flower = {}; 283 struct net_device *dev = f->hw_dev; 284 285 if (!tc_can_offload(dev)) 286 return; 287 288 tc_cls_common_offload_init(&cls_flower.common, tp); 289 cls_flower.command = TC_CLSFLOWER_STATS; 290 cls_flower.cookie = (unsigned long) f; 291 cls_flower.exts = &f->exts; 292 293 dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_CLSFLOWER, 294 &cls_flower); 295 } 296 297 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) 298 { 299 struct cls_fl_head *head = rtnl_dereference(tp->root); 300 301 idr_remove_ext(&head->handle_idr, f->handle); 302 list_del_rcu(&f->list); 303 if (!tc_skip_hw(f->flags)) 304 fl_hw_destroy_filter(tp, f); 305 tcf_unbind_filter(tp, &f->res); 306 call_rcu(&f->rcu, fl_destroy_filter); 307 } 308 309 static void fl_destroy_sleepable(struct work_struct *work) 310 { 311 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 312 work); 313 if (head->mask_assigned) 314 rhashtable_destroy(&head->ht); 315 kfree(head); 316 module_put(THIS_MODULE); 317 } 318 319 static void fl_destroy_rcu(struct rcu_head *rcu) 320 { 321 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 322 323 INIT_WORK(&head->work, fl_destroy_sleepable); 324 schedule_work(&head->work); 325 } 326 327 static void fl_destroy(struct tcf_proto *tp) 328 { 329 struct cls_fl_head *head = rtnl_dereference(tp->root); 330 struct cls_fl_filter *f, *next; 331 332 list_for_each_entry_safe(f, next, &head->filters, list) 333 __fl_delete(tp, f); 334 idr_destroy(&head->handle_idr); 335 336 __module_get(THIS_MODULE); 337 call_rcu(&head->rcu, fl_destroy_rcu); 338 } 339 340 static void *fl_get(struct tcf_proto *tp, u32 handle) 341 { 342 struct cls_fl_head *head = rtnl_dereference(tp->root); 343 344 return idr_find_ext(&head->handle_idr, handle); 345 } 346 347 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 348 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 349 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 350 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 351 .len = IFNAMSIZ }, 352 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 353 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 354 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 355 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 356 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 357 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 358 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 359 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 360 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 361 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 362 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 363 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 364 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 365 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 366 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 367 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 368 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 369 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 370 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 371 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 372 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 373 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 374 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 375 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 376 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 377 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 378 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 379 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 380 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 381 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 382 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 383 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 384 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 385 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 386 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 387 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 388 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 389 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 390 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 391 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 392 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 393 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 394 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 395 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 396 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 397 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 398 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 399 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 400 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 401 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 402 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 403 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 404 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 405 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 406 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 407 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 408 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 409 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 410 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 411 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 412 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 413 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 414 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 415 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 416 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 417 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 418 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 419 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 420 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 421 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 422 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 423 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 424 }; 425 426 static void fl_set_key_val(struct nlattr **tb, 427 void *val, int val_type, 428 void *mask, int mask_type, int len) 429 { 430 if (!tb[val_type]) 431 return; 432 memcpy(val, nla_data(tb[val_type]), len); 433 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 434 memset(mask, 0xff, len); 435 else 436 memcpy(mask, nla_data(tb[mask_type]), len); 437 } 438 439 static int fl_set_key_mpls(struct nlattr **tb, 440 struct flow_dissector_key_mpls *key_val, 441 struct flow_dissector_key_mpls *key_mask) 442 { 443 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 444 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 445 key_mask->mpls_ttl = MPLS_TTL_MASK; 446 } 447 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 448 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 449 450 if (bos & ~MPLS_BOS_MASK) 451 return -EINVAL; 452 key_val->mpls_bos = bos; 453 key_mask->mpls_bos = MPLS_BOS_MASK; 454 } 455 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 456 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 457 458 if (tc & ~MPLS_TC_MASK) 459 return -EINVAL; 460 key_val->mpls_tc = tc; 461 key_mask->mpls_tc = MPLS_TC_MASK; 462 } 463 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 464 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 465 466 if (label & ~MPLS_LABEL_MASK) 467 return -EINVAL; 468 key_val->mpls_label = label; 469 key_mask->mpls_label = MPLS_LABEL_MASK; 470 } 471 return 0; 472 } 473 474 static void fl_set_key_vlan(struct nlattr **tb, 475 struct flow_dissector_key_vlan *key_val, 476 struct flow_dissector_key_vlan *key_mask) 477 { 478 #define VLAN_PRIORITY_MASK 0x7 479 480 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 481 key_val->vlan_id = 482 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 483 key_mask->vlan_id = VLAN_VID_MASK; 484 } 485 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 486 key_val->vlan_priority = 487 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 488 VLAN_PRIORITY_MASK; 489 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 490 } 491 } 492 493 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 494 u32 *dissector_key, u32 *dissector_mask, 495 u32 flower_flag_bit, u32 dissector_flag_bit) 496 { 497 if (flower_mask & flower_flag_bit) { 498 *dissector_mask |= dissector_flag_bit; 499 if (flower_key & flower_flag_bit) 500 *dissector_key |= dissector_flag_bit; 501 } 502 } 503 504 static int fl_set_key_flags(struct nlattr **tb, 505 u32 *flags_key, u32 *flags_mask) 506 { 507 u32 key, mask; 508 509 /* mask is mandatory for flags */ 510 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 511 return -EINVAL; 512 513 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 514 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 515 516 *flags_key = 0; 517 *flags_mask = 0; 518 519 fl_set_key_flag(key, mask, flags_key, flags_mask, 520 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 521 522 return 0; 523 } 524 525 static void fl_set_key_ip(struct nlattr **tb, 526 struct flow_dissector_key_ip *key, 527 struct flow_dissector_key_ip *mask) 528 { 529 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS, 530 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK, 531 sizeof(key->tos)); 532 533 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, 534 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK, 535 sizeof(key->ttl)); 536 } 537 538 static int fl_set_key(struct net *net, struct nlattr **tb, 539 struct fl_flow_key *key, struct fl_flow_key *mask) 540 { 541 __be16 ethertype; 542 int ret = 0; 543 #ifdef CONFIG_NET_CLS_IND 544 if (tb[TCA_FLOWER_INDEV]) { 545 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); 546 if (err < 0) 547 return err; 548 key->indev_ifindex = err; 549 mask->indev_ifindex = 0xffffffff; 550 } 551 #endif 552 553 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 554 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 555 sizeof(key->eth.dst)); 556 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 557 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 558 sizeof(key->eth.src)); 559 560 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 561 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 562 563 if (ethertype == htons(ETH_P_8021Q)) { 564 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 565 fl_set_key_val(tb, &key->basic.n_proto, 566 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 567 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 568 sizeof(key->basic.n_proto)); 569 } else { 570 key->basic.n_proto = ethertype; 571 mask->basic.n_proto = cpu_to_be16(~0); 572 } 573 } 574 575 if (key->basic.n_proto == htons(ETH_P_IP) || 576 key->basic.n_proto == htons(ETH_P_IPV6)) { 577 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 578 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 579 sizeof(key->basic.ip_proto)); 580 fl_set_key_ip(tb, &key->ip, &mask->ip); 581 } 582 583 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 584 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 585 mask->control.addr_type = ~0; 586 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 587 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 588 sizeof(key->ipv4.src)); 589 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 590 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 591 sizeof(key->ipv4.dst)); 592 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 593 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 594 mask->control.addr_type = ~0; 595 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 596 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 597 sizeof(key->ipv6.src)); 598 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 599 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 600 sizeof(key->ipv6.dst)); 601 } 602 603 if (key->basic.ip_proto == IPPROTO_TCP) { 604 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 605 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 606 sizeof(key->tp.src)); 607 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 608 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 609 sizeof(key->tp.dst)); 610 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 611 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 612 sizeof(key->tcp.flags)); 613 } else if (key->basic.ip_proto == IPPROTO_UDP) { 614 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 615 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 616 sizeof(key->tp.src)); 617 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 618 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 619 sizeof(key->tp.dst)); 620 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 621 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 622 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 623 sizeof(key->tp.src)); 624 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 625 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 626 sizeof(key->tp.dst)); 627 } else if (key->basic.n_proto == htons(ETH_P_IP) && 628 key->basic.ip_proto == IPPROTO_ICMP) { 629 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 630 &mask->icmp.type, 631 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 632 sizeof(key->icmp.type)); 633 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 634 &mask->icmp.code, 635 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 636 sizeof(key->icmp.code)); 637 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 638 key->basic.ip_proto == IPPROTO_ICMPV6) { 639 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 640 &mask->icmp.type, 641 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 642 sizeof(key->icmp.type)); 643 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 644 &mask->icmp.code, 645 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 646 sizeof(key->icmp.code)); 647 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 648 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 649 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 650 if (ret) 651 return ret; 652 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 653 key->basic.n_proto == htons(ETH_P_RARP)) { 654 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 655 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 656 sizeof(key->arp.sip)); 657 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 658 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 659 sizeof(key->arp.tip)); 660 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 661 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 662 sizeof(key->arp.op)); 663 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 664 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 665 sizeof(key->arp.sha)); 666 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 667 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 668 sizeof(key->arp.tha)); 669 } 670 671 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 672 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 673 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 674 mask->enc_control.addr_type = ~0; 675 fl_set_key_val(tb, &key->enc_ipv4.src, 676 TCA_FLOWER_KEY_ENC_IPV4_SRC, 677 &mask->enc_ipv4.src, 678 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 679 sizeof(key->enc_ipv4.src)); 680 fl_set_key_val(tb, &key->enc_ipv4.dst, 681 TCA_FLOWER_KEY_ENC_IPV4_DST, 682 &mask->enc_ipv4.dst, 683 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 684 sizeof(key->enc_ipv4.dst)); 685 } 686 687 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 688 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 689 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 690 mask->enc_control.addr_type = ~0; 691 fl_set_key_val(tb, &key->enc_ipv6.src, 692 TCA_FLOWER_KEY_ENC_IPV6_SRC, 693 &mask->enc_ipv6.src, 694 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 695 sizeof(key->enc_ipv6.src)); 696 fl_set_key_val(tb, &key->enc_ipv6.dst, 697 TCA_FLOWER_KEY_ENC_IPV6_DST, 698 &mask->enc_ipv6.dst, 699 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 700 sizeof(key->enc_ipv6.dst)); 701 } 702 703 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 704 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 705 sizeof(key->enc_key_id.keyid)); 706 707 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 708 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 709 sizeof(key->enc_tp.src)); 710 711 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 712 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 713 sizeof(key->enc_tp.dst)); 714 715 if (tb[TCA_FLOWER_KEY_FLAGS]) 716 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 717 718 return ret; 719 } 720 721 static bool fl_mask_eq(struct fl_flow_mask *mask1, 722 struct fl_flow_mask *mask2) 723 { 724 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 725 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 726 727 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 728 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 729 } 730 731 static const struct rhashtable_params fl_ht_params = { 732 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 733 .head_offset = offsetof(struct cls_fl_filter, ht_node), 734 .automatic_shrinking = true, 735 }; 736 737 static int fl_init_hashtable(struct cls_fl_head *head, 738 struct fl_flow_mask *mask) 739 { 740 head->ht_params = fl_ht_params; 741 head->ht_params.key_len = fl_mask_range(mask); 742 head->ht_params.key_offset += mask->range.start; 743 744 return rhashtable_init(&head->ht, &head->ht_params); 745 } 746 747 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 748 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 749 750 #define FL_KEY_IS_MASKED(mask, member) \ 751 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 752 0, FL_KEY_MEMBER_SIZE(member)) \ 753 754 #define FL_KEY_SET(keys, cnt, id, member) \ 755 do { \ 756 keys[cnt].key_id = id; \ 757 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 758 cnt++; \ 759 } while(0); 760 761 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 762 do { \ 763 if (FL_KEY_IS_MASKED(mask, member)) \ 764 FL_KEY_SET(keys, cnt, id, member); \ 765 } while(0); 766 767 static void fl_init_dissector(struct cls_fl_head *head, 768 struct fl_flow_mask *mask) 769 { 770 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 771 size_t cnt = 0; 772 773 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 774 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 775 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 776 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 777 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 778 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 779 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 780 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 781 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 782 FLOW_DISSECTOR_KEY_PORTS, tp); 783 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 784 FLOW_DISSECTOR_KEY_IP, ip); 785 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 786 FLOW_DISSECTOR_KEY_TCP, tcp); 787 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 788 FLOW_DISSECTOR_KEY_ICMP, icmp); 789 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 790 FLOW_DISSECTOR_KEY_ARP, arp); 791 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 792 FLOW_DISSECTOR_KEY_MPLS, mpls); 793 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 794 FLOW_DISSECTOR_KEY_VLAN, vlan); 795 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 796 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 797 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 798 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 799 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 800 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 801 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 802 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 803 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 804 enc_control); 805 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 806 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 807 808 skb_flow_dissector_init(&head->dissector, keys, cnt); 809 } 810 811 static int fl_check_assign_mask(struct cls_fl_head *head, 812 struct fl_flow_mask *mask) 813 { 814 int err; 815 816 if (head->mask_assigned) { 817 if (!fl_mask_eq(&head->mask, mask)) 818 return -EINVAL; 819 else 820 return 0; 821 } 822 823 /* Mask is not assigned yet. So assign it and init hashtable 824 * according to that. 825 */ 826 err = fl_init_hashtable(head, mask); 827 if (err) 828 return err; 829 memcpy(&head->mask, mask, sizeof(head->mask)); 830 head->mask_assigned = true; 831 832 fl_init_dissector(head, mask); 833 834 return 0; 835 } 836 837 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 838 struct cls_fl_filter *f, struct fl_flow_mask *mask, 839 unsigned long base, struct nlattr **tb, 840 struct nlattr *est, bool ovr) 841 { 842 int err; 843 844 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr); 845 if (err < 0) 846 return err; 847 848 if (tb[TCA_FLOWER_CLASSID]) { 849 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 850 tcf_bind_filter(tp, &f->res, base); 851 } 852 853 err = fl_set_key(net, tb, &f->key, &mask->key); 854 if (err) 855 return err; 856 857 fl_mask_update_range(mask); 858 fl_set_masked_key(&f->mkey, &f->key, mask); 859 860 return 0; 861 } 862 863 static int fl_change(struct net *net, struct sk_buff *in_skb, 864 struct tcf_proto *tp, unsigned long base, 865 u32 handle, struct nlattr **tca, 866 void **arg, bool ovr) 867 { 868 struct cls_fl_head *head = rtnl_dereference(tp->root); 869 struct cls_fl_filter *fold = *arg; 870 struct cls_fl_filter *fnew; 871 struct nlattr **tb; 872 struct fl_flow_mask mask = {}; 873 unsigned long idr_index; 874 int err; 875 876 if (!tca[TCA_OPTIONS]) 877 return -EINVAL; 878 879 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 880 if (!tb) 881 return -ENOBUFS; 882 883 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 884 fl_policy, NULL); 885 if (err < 0) 886 goto errout_tb; 887 888 if (fold && handle && fold->handle != handle) { 889 err = -EINVAL; 890 goto errout_tb; 891 } 892 893 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 894 if (!fnew) { 895 err = -ENOBUFS; 896 goto errout_tb; 897 } 898 899 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 900 if (err < 0) 901 goto errout; 902 903 if (!handle) { 904 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index, 905 1, 0x80000000, GFP_KERNEL); 906 if (err) 907 goto errout; 908 fnew->handle = idr_index; 909 } 910 911 /* user specifies a handle and it doesn't exist */ 912 if (handle && !fold) { 913 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index, 914 handle, handle + 1, GFP_KERNEL); 915 if (err) 916 goto errout; 917 fnew->handle = idr_index; 918 } 919 920 if (tb[TCA_FLOWER_FLAGS]) { 921 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 922 923 if (!tc_flags_valid(fnew->flags)) { 924 err = -EINVAL; 925 goto errout; 926 } 927 } 928 929 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 930 if (err) 931 goto errout; 932 933 err = fl_check_assign_mask(head, &mask); 934 if (err) 935 goto errout; 936 937 if (!tc_skip_sw(fnew->flags)) { 938 if (!fold && fl_lookup(head, &fnew->mkey)) { 939 err = -EEXIST; 940 goto errout; 941 } 942 943 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 944 head->ht_params); 945 if (err) 946 goto errout; 947 } 948 949 if (!tc_skip_hw(fnew->flags)) { 950 err = fl_hw_replace_filter(tp, 951 &head->dissector, 952 &mask.key, 953 fnew); 954 if (err) 955 goto errout; 956 } 957 958 if (!tc_in_hw(fnew->flags)) 959 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 960 961 if (fold) { 962 if (!tc_skip_sw(fold->flags)) 963 rhashtable_remove_fast(&head->ht, &fold->ht_node, 964 head->ht_params); 965 if (!tc_skip_hw(fold->flags)) 966 fl_hw_destroy_filter(tp, fold); 967 } 968 969 *arg = fnew; 970 971 if (fold) { 972 fnew->handle = handle; 973 idr_replace_ext(&head->handle_idr, fnew, fnew->handle); 974 list_replace_rcu(&fold->list, &fnew->list); 975 tcf_unbind_filter(tp, &fold->res); 976 call_rcu(&fold->rcu, fl_destroy_filter); 977 } else { 978 list_add_tail_rcu(&fnew->list, &head->filters); 979 } 980 981 kfree(tb); 982 return 0; 983 984 errout: 985 tcf_exts_destroy(&fnew->exts); 986 kfree(fnew); 987 errout_tb: 988 kfree(tb); 989 return err; 990 } 991 992 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last) 993 { 994 struct cls_fl_head *head = rtnl_dereference(tp->root); 995 struct cls_fl_filter *f = arg; 996 997 if (!tc_skip_sw(f->flags)) 998 rhashtable_remove_fast(&head->ht, &f->ht_node, 999 head->ht_params); 1000 __fl_delete(tp, f); 1001 *last = list_empty(&head->filters); 1002 return 0; 1003 } 1004 1005 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1006 { 1007 struct cls_fl_head *head = rtnl_dereference(tp->root); 1008 struct cls_fl_filter *f; 1009 1010 list_for_each_entry_rcu(f, &head->filters, list) { 1011 if (arg->count < arg->skip) 1012 goto skip; 1013 if (arg->fn(tp, f, arg) < 0) { 1014 arg->stop = 1; 1015 break; 1016 } 1017 skip: 1018 arg->count++; 1019 } 1020 } 1021 1022 static int fl_dump_key_val(struct sk_buff *skb, 1023 void *val, int val_type, 1024 void *mask, int mask_type, int len) 1025 { 1026 int err; 1027 1028 if (!memchr_inv(mask, 0, len)) 1029 return 0; 1030 err = nla_put(skb, val_type, len, val); 1031 if (err) 1032 return err; 1033 if (mask_type != TCA_FLOWER_UNSPEC) { 1034 err = nla_put(skb, mask_type, len, mask); 1035 if (err) 1036 return err; 1037 } 1038 return 0; 1039 } 1040 1041 static int fl_dump_key_mpls(struct sk_buff *skb, 1042 struct flow_dissector_key_mpls *mpls_key, 1043 struct flow_dissector_key_mpls *mpls_mask) 1044 { 1045 int err; 1046 1047 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1048 return 0; 1049 if (mpls_mask->mpls_ttl) { 1050 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1051 mpls_key->mpls_ttl); 1052 if (err) 1053 return err; 1054 } 1055 if (mpls_mask->mpls_tc) { 1056 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1057 mpls_key->mpls_tc); 1058 if (err) 1059 return err; 1060 } 1061 if (mpls_mask->mpls_label) { 1062 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1063 mpls_key->mpls_label); 1064 if (err) 1065 return err; 1066 } 1067 if (mpls_mask->mpls_bos) { 1068 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1069 mpls_key->mpls_bos); 1070 if (err) 1071 return err; 1072 } 1073 return 0; 1074 } 1075 1076 static int fl_dump_key_ip(struct sk_buff *skb, 1077 struct flow_dissector_key_ip *key, 1078 struct flow_dissector_key_ip *mask) 1079 { 1080 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos, 1081 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) || 1082 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl, 1083 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl))) 1084 return -1; 1085 1086 return 0; 1087 } 1088 1089 static int fl_dump_key_vlan(struct sk_buff *skb, 1090 struct flow_dissector_key_vlan *vlan_key, 1091 struct flow_dissector_key_vlan *vlan_mask) 1092 { 1093 int err; 1094 1095 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1096 return 0; 1097 if (vlan_mask->vlan_id) { 1098 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 1099 vlan_key->vlan_id); 1100 if (err) 1101 return err; 1102 } 1103 if (vlan_mask->vlan_priority) { 1104 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 1105 vlan_key->vlan_priority); 1106 if (err) 1107 return err; 1108 } 1109 return 0; 1110 } 1111 1112 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1113 u32 *flower_key, u32 *flower_mask, 1114 u32 flower_flag_bit, u32 dissector_flag_bit) 1115 { 1116 if (dissector_mask & dissector_flag_bit) { 1117 *flower_mask |= flower_flag_bit; 1118 if (dissector_key & dissector_flag_bit) 1119 *flower_key |= flower_flag_bit; 1120 } 1121 } 1122 1123 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1124 { 1125 u32 key, mask; 1126 __be32 _key, _mask; 1127 int err; 1128 1129 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1130 return 0; 1131 1132 key = 0; 1133 mask = 0; 1134 1135 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1136 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1137 1138 _key = cpu_to_be32(key); 1139 _mask = cpu_to_be32(mask); 1140 1141 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1142 if (err) 1143 return err; 1144 1145 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1146 } 1147 1148 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1149 struct sk_buff *skb, struct tcmsg *t) 1150 { 1151 struct cls_fl_head *head = rtnl_dereference(tp->root); 1152 struct cls_fl_filter *f = fh; 1153 struct nlattr *nest; 1154 struct fl_flow_key *key, *mask; 1155 1156 if (!f) 1157 return skb->len; 1158 1159 t->tcm_handle = f->handle; 1160 1161 nest = nla_nest_start(skb, TCA_OPTIONS); 1162 if (!nest) 1163 goto nla_put_failure; 1164 1165 if (f->res.classid && 1166 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1167 goto nla_put_failure; 1168 1169 key = &f->key; 1170 mask = &head->mask.key; 1171 1172 if (mask->indev_ifindex) { 1173 struct net_device *dev; 1174 1175 dev = __dev_get_by_index(net, key->indev_ifindex); 1176 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1177 goto nla_put_failure; 1178 } 1179 1180 if (!tc_skip_hw(f->flags)) 1181 fl_hw_update_stats(tp, f); 1182 1183 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1184 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1185 sizeof(key->eth.dst)) || 1186 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1187 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1188 sizeof(key->eth.src)) || 1189 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1190 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1191 sizeof(key->basic.n_proto))) 1192 goto nla_put_failure; 1193 1194 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1195 goto nla_put_failure; 1196 1197 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1198 goto nla_put_failure; 1199 1200 if ((key->basic.n_proto == htons(ETH_P_IP) || 1201 key->basic.n_proto == htons(ETH_P_IPV6)) && 1202 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1203 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1204 sizeof(key->basic.ip_proto)) || 1205 fl_dump_key_ip(skb, &key->ip, &mask->ip))) 1206 goto nla_put_failure; 1207 1208 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1209 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1210 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1211 sizeof(key->ipv4.src)) || 1212 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1213 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1214 sizeof(key->ipv4.dst)))) 1215 goto nla_put_failure; 1216 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1217 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1218 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1219 sizeof(key->ipv6.src)) || 1220 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1221 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1222 sizeof(key->ipv6.dst)))) 1223 goto nla_put_failure; 1224 1225 if (key->basic.ip_proto == IPPROTO_TCP && 1226 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1227 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1228 sizeof(key->tp.src)) || 1229 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1230 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1231 sizeof(key->tp.dst)) || 1232 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1233 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1234 sizeof(key->tcp.flags)))) 1235 goto nla_put_failure; 1236 else if (key->basic.ip_proto == IPPROTO_UDP && 1237 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1238 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1239 sizeof(key->tp.src)) || 1240 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1241 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1242 sizeof(key->tp.dst)))) 1243 goto nla_put_failure; 1244 else if (key->basic.ip_proto == IPPROTO_SCTP && 1245 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1246 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1247 sizeof(key->tp.src)) || 1248 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1249 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1250 sizeof(key->tp.dst)))) 1251 goto nla_put_failure; 1252 else if (key->basic.n_proto == htons(ETH_P_IP) && 1253 key->basic.ip_proto == IPPROTO_ICMP && 1254 (fl_dump_key_val(skb, &key->icmp.type, 1255 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1256 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1257 sizeof(key->icmp.type)) || 1258 fl_dump_key_val(skb, &key->icmp.code, 1259 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1260 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1261 sizeof(key->icmp.code)))) 1262 goto nla_put_failure; 1263 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1264 key->basic.ip_proto == IPPROTO_ICMPV6 && 1265 (fl_dump_key_val(skb, &key->icmp.type, 1266 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1267 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1268 sizeof(key->icmp.type)) || 1269 fl_dump_key_val(skb, &key->icmp.code, 1270 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1271 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1272 sizeof(key->icmp.code)))) 1273 goto nla_put_failure; 1274 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1275 key->basic.n_proto == htons(ETH_P_RARP)) && 1276 (fl_dump_key_val(skb, &key->arp.sip, 1277 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1278 TCA_FLOWER_KEY_ARP_SIP_MASK, 1279 sizeof(key->arp.sip)) || 1280 fl_dump_key_val(skb, &key->arp.tip, 1281 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1282 TCA_FLOWER_KEY_ARP_TIP_MASK, 1283 sizeof(key->arp.tip)) || 1284 fl_dump_key_val(skb, &key->arp.op, 1285 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1286 TCA_FLOWER_KEY_ARP_OP_MASK, 1287 sizeof(key->arp.op)) || 1288 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1289 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1290 sizeof(key->arp.sha)) || 1291 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1292 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1293 sizeof(key->arp.tha)))) 1294 goto nla_put_failure; 1295 1296 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1297 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1298 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1299 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1300 sizeof(key->enc_ipv4.src)) || 1301 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1302 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1303 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1304 sizeof(key->enc_ipv4.dst)))) 1305 goto nla_put_failure; 1306 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1307 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1308 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1309 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1310 sizeof(key->enc_ipv6.src)) || 1311 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1312 TCA_FLOWER_KEY_ENC_IPV6_DST, 1313 &mask->enc_ipv6.dst, 1314 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1315 sizeof(key->enc_ipv6.dst)))) 1316 goto nla_put_failure; 1317 1318 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1319 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1320 sizeof(key->enc_key_id)) || 1321 fl_dump_key_val(skb, &key->enc_tp.src, 1322 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1323 &mask->enc_tp.src, 1324 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1325 sizeof(key->enc_tp.src)) || 1326 fl_dump_key_val(skb, &key->enc_tp.dst, 1327 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1328 &mask->enc_tp.dst, 1329 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1330 sizeof(key->enc_tp.dst))) 1331 goto nla_put_failure; 1332 1333 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1334 goto nla_put_failure; 1335 1336 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1337 goto nla_put_failure; 1338 1339 if (tcf_exts_dump(skb, &f->exts)) 1340 goto nla_put_failure; 1341 1342 nla_nest_end(skb, nest); 1343 1344 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1345 goto nla_put_failure; 1346 1347 return skb->len; 1348 1349 nla_put_failure: 1350 nla_nest_cancel(skb, nest); 1351 return -1; 1352 } 1353 1354 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1355 { 1356 struct cls_fl_filter *f = fh; 1357 1358 if (f && f->res.classid == classid) 1359 f->res.class = cl; 1360 } 1361 1362 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1363 .kind = "flower", 1364 .classify = fl_classify, 1365 .init = fl_init, 1366 .destroy = fl_destroy, 1367 .get = fl_get, 1368 .change = fl_change, 1369 .delete = fl_delete, 1370 .walk = fl_walk, 1371 .dump = fl_dump, 1372 .bind_class = fl_bind_class, 1373 .owner = THIS_MODULE, 1374 }; 1375 1376 static int __init cls_fl_init(void) 1377 { 1378 return register_tcf_proto_ops(&cls_fl_ops); 1379 } 1380 1381 static void __exit cls_fl_exit(void) 1382 { 1383 unregister_tcf_proto_ops(&cls_fl_ops); 1384 } 1385 1386 module_init(cls_fl_init); 1387 module_exit(cls_fl_exit); 1388 1389 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1390 MODULE_DESCRIPTION("Flower classifier"); 1391 MODULE_LICENSE("GPL v2"); 1392