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 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 53 54 struct fl_flow_mask_range { 55 unsigned short int start; 56 unsigned short int end; 57 }; 58 59 struct fl_flow_mask { 60 struct fl_flow_key key; 61 struct fl_flow_mask_range range; 62 struct rcu_head rcu; 63 }; 64 65 struct cls_fl_head { 66 struct rhashtable ht; 67 struct fl_flow_mask mask; 68 struct flow_dissector dissector; 69 u32 hgen; 70 bool mask_assigned; 71 struct list_head filters; 72 struct rhashtable_params ht_params; 73 union { 74 struct work_struct work; 75 struct rcu_head rcu; 76 }; 77 }; 78 79 struct cls_fl_filter { 80 struct rhash_head ht_node; 81 struct fl_flow_key mkey; 82 struct tcf_exts exts; 83 struct tcf_result res; 84 struct fl_flow_key key; 85 struct list_head list; 86 u32 handle; 87 u32 flags; 88 struct rcu_head rcu; 89 struct tc_to_netdev tc; 90 struct net_device *hw_dev; 91 }; 92 93 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 94 { 95 return mask->range.end - mask->range.start; 96 } 97 98 static void fl_mask_update_range(struct fl_flow_mask *mask) 99 { 100 const u8 *bytes = (const u8 *) &mask->key; 101 size_t size = sizeof(mask->key); 102 size_t i, first = 0, last = size - 1; 103 104 for (i = 0; i < sizeof(mask->key); i++) { 105 if (bytes[i]) { 106 if (!first && i) 107 first = i; 108 last = i; 109 } 110 } 111 mask->range.start = rounddown(first, sizeof(long)); 112 mask->range.end = roundup(last + 1, sizeof(long)); 113 } 114 115 static void *fl_key_get_start(struct fl_flow_key *key, 116 const struct fl_flow_mask *mask) 117 { 118 return (u8 *) key + mask->range.start; 119 } 120 121 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 122 struct fl_flow_mask *mask) 123 { 124 const long *lkey = fl_key_get_start(key, mask); 125 const long *lmask = fl_key_get_start(&mask->key, mask); 126 long *lmkey = fl_key_get_start(mkey, mask); 127 int i; 128 129 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 130 *lmkey++ = *lkey++ & *lmask++; 131 } 132 133 static void fl_clear_masked_range(struct fl_flow_key *key, 134 struct fl_flow_mask *mask) 135 { 136 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 137 } 138 139 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head, 140 struct fl_flow_key *mkey) 141 { 142 return rhashtable_lookup_fast(&head->ht, 143 fl_key_get_start(mkey, &head->mask), 144 head->ht_params); 145 } 146 147 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 148 struct tcf_result *res) 149 { 150 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 151 struct cls_fl_filter *f; 152 struct fl_flow_key skb_key; 153 struct fl_flow_key skb_mkey; 154 struct ip_tunnel_info *info; 155 156 if (!atomic_read(&head->ht.nelems)) 157 return -1; 158 159 fl_clear_masked_range(&skb_key, &head->mask); 160 161 info = skb_tunnel_info(skb); 162 if (info) { 163 struct ip_tunnel_key *key = &info->key; 164 165 switch (ip_tunnel_info_af(info)) { 166 case AF_INET: 167 skb_key.enc_control.addr_type = 168 FLOW_DISSECTOR_KEY_IPV4_ADDRS; 169 skb_key.enc_ipv4.src = key->u.ipv4.src; 170 skb_key.enc_ipv4.dst = key->u.ipv4.dst; 171 break; 172 case AF_INET6: 173 skb_key.enc_control.addr_type = 174 FLOW_DISSECTOR_KEY_IPV6_ADDRS; 175 skb_key.enc_ipv6.src = key->u.ipv6.src; 176 skb_key.enc_ipv6.dst = key->u.ipv6.dst; 177 break; 178 } 179 180 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); 181 skb_key.enc_tp.src = key->tp_src; 182 skb_key.enc_tp.dst = key->tp_dst; 183 } 184 185 skb_key.indev_ifindex = skb->skb_iif; 186 /* skb_flow_dissect() does not set n_proto in case an unknown protocol, 187 * so do it rather here. 188 */ 189 skb_key.basic.n_proto = skb->protocol; 190 skb_flow_dissect(skb, &head->dissector, &skb_key, 0); 191 192 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); 193 194 f = fl_lookup(head, &skb_mkey); 195 if (f && !tc_skip_sw(f->flags)) { 196 *res = f->res; 197 return tcf_exts_exec(skb, &f->exts, res); 198 } 199 return -1; 200 } 201 202 static int fl_init(struct tcf_proto *tp) 203 { 204 struct cls_fl_head *head; 205 206 head = kzalloc(sizeof(*head), GFP_KERNEL); 207 if (!head) 208 return -ENOBUFS; 209 210 INIT_LIST_HEAD_RCU(&head->filters); 211 rcu_assign_pointer(tp->root, head); 212 213 return 0; 214 } 215 216 static void fl_destroy_filter(struct rcu_head *head) 217 { 218 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); 219 220 tcf_exts_destroy(&f->exts); 221 kfree(f); 222 } 223 224 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) 225 { 226 struct tc_cls_flower_offload offload = {0}; 227 struct net_device *dev = f->hw_dev; 228 struct tc_to_netdev *tc = &f->tc; 229 230 if (!tc_can_offload(dev, tp)) 231 return; 232 233 offload.command = TC_CLSFLOWER_DESTROY; 234 offload.prio = tp->prio; 235 offload.cookie = (unsigned long)f; 236 237 tc->type = TC_SETUP_CLSFLOWER; 238 tc->cls_flower = &offload; 239 240 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); 241 } 242 243 static int fl_hw_replace_filter(struct tcf_proto *tp, 244 struct flow_dissector *dissector, 245 struct fl_flow_key *mask, 246 struct cls_fl_filter *f) 247 { 248 struct net_device *dev = tp->q->dev_queue->dev; 249 struct tc_cls_flower_offload offload = {0}; 250 struct tc_to_netdev *tc = &f->tc; 251 int err; 252 253 if (!tc_can_offload(dev, tp)) { 254 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || 255 (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) { 256 f->hw_dev = dev; 257 return tc_skip_sw(f->flags) ? -EINVAL : 0; 258 } 259 dev = f->hw_dev; 260 tc->egress_dev = true; 261 } else { 262 f->hw_dev = dev; 263 } 264 265 offload.command = TC_CLSFLOWER_REPLACE; 266 offload.prio = tp->prio; 267 offload.cookie = (unsigned long)f; 268 offload.dissector = dissector; 269 offload.mask = mask; 270 offload.key = &f->mkey; 271 offload.exts = &f->exts; 272 273 tc->type = TC_SETUP_CLSFLOWER; 274 tc->cls_flower = &offload; 275 276 err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, 277 tc); 278 if (!err) 279 f->flags |= TCA_CLS_FLAGS_IN_HW; 280 281 if (tc_skip_sw(f->flags)) 282 return err; 283 return 0; 284 } 285 286 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 287 { 288 struct tc_cls_flower_offload offload = {0}; 289 struct net_device *dev = f->hw_dev; 290 struct tc_to_netdev *tc = &f->tc; 291 292 if (!tc_can_offload(dev, tp)) 293 return; 294 295 offload.command = TC_CLSFLOWER_STATS; 296 offload.prio = tp->prio; 297 offload.cookie = (unsigned long)f; 298 offload.exts = &f->exts; 299 300 tc->type = TC_SETUP_CLSFLOWER; 301 tc->cls_flower = &offload; 302 303 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); 304 } 305 306 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) 307 { 308 list_del_rcu(&f->list); 309 if (!tc_skip_hw(f->flags)) 310 fl_hw_destroy_filter(tp, f); 311 tcf_unbind_filter(tp, &f->res); 312 call_rcu(&f->rcu, fl_destroy_filter); 313 } 314 315 static void fl_destroy_sleepable(struct work_struct *work) 316 { 317 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 318 work); 319 if (head->mask_assigned) 320 rhashtable_destroy(&head->ht); 321 kfree(head); 322 module_put(THIS_MODULE); 323 } 324 325 static void fl_destroy_rcu(struct rcu_head *rcu) 326 { 327 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 328 329 INIT_WORK(&head->work, fl_destroy_sleepable); 330 schedule_work(&head->work); 331 } 332 333 static void fl_destroy(struct tcf_proto *tp) 334 { 335 struct cls_fl_head *head = rtnl_dereference(tp->root); 336 struct cls_fl_filter *f, *next; 337 338 list_for_each_entry_safe(f, next, &head->filters, list) 339 __fl_delete(tp, f); 340 341 __module_get(THIS_MODULE); 342 call_rcu(&head->rcu, fl_destroy_rcu); 343 } 344 345 static unsigned long fl_get(struct tcf_proto *tp, u32 handle) 346 { 347 struct cls_fl_head *head = rtnl_dereference(tp->root); 348 struct cls_fl_filter *f; 349 350 list_for_each_entry(f, &head->filters, list) 351 if (f->handle == handle) 352 return (unsigned long) f; 353 return 0; 354 } 355 356 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 357 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 358 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 359 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 360 .len = IFNAMSIZ }, 361 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 362 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 363 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 364 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 365 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 366 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 367 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 368 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 369 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 370 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 371 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 372 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 373 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 374 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 375 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 376 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 377 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 378 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 379 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 380 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 381 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 382 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 383 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 384 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 385 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 386 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 387 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 388 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 389 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 390 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 391 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 392 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 393 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 394 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 395 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 396 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 397 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 398 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 399 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 400 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 401 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 402 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 403 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 404 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 405 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 406 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 407 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 408 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 409 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 410 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 411 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 412 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 413 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 414 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 415 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 416 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 417 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 418 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 419 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 420 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 421 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 422 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 423 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 424 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 425 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 426 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 427 }; 428 429 static void fl_set_key_val(struct nlattr **tb, 430 void *val, int val_type, 431 void *mask, int mask_type, int len) 432 { 433 if (!tb[val_type]) 434 return; 435 memcpy(val, nla_data(tb[val_type]), len); 436 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 437 memset(mask, 0xff, len); 438 else 439 memcpy(mask, nla_data(tb[mask_type]), len); 440 } 441 442 static int fl_set_key_mpls(struct nlattr **tb, 443 struct flow_dissector_key_mpls *key_val, 444 struct flow_dissector_key_mpls *key_mask) 445 { 446 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 447 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 448 key_mask->mpls_ttl = MPLS_TTL_MASK; 449 } 450 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 451 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 452 453 if (bos & ~MPLS_BOS_MASK) 454 return -EINVAL; 455 key_val->mpls_bos = bos; 456 key_mask->mpls_bos = MPLS_BOS_MASK; 457 } 458 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 459 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 460 461 if (tc & ~MPLS_TC_MASK) 462 return -EINVAL; 463 key_val->mpls_tc = tc; 464 key_mask->mpls_tc = MPLS_TC_MASK; 465 } 466 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 467 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 468 469 if (label & ~MPLS_LABEL_MASK) 470 return -EINVAL; 471 key_val->mpls_label = label; 472 key_mask->mpls_label = MPLS_LABEL_MASK; 473 } 474 return 0; 475 } 476 477 static void fl_set_key_vlan(struct nlattr **tb, 478 struct flow_dissector_key_vlan *key_val, 479 struct flow_dissector_key_vlan *key_mask) 480 { 481 #define VLAN_PRIORITY_MASK 0x7 482 483 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 484 key_val->vlan_id = 485 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 486 key_mask->vlan_id = VLAN_VID_MASK; 487 } 488 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 489 key_val->vlan_priority = 490 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 491 VLAN_PRIORITY_MASK; 492 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 493 } 494 } 495 496 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 497 u32 *dissector_key, u32 *dissector_mask, 498 u32 flower_flag_bit, u32 dissector_flag_bit) 499 { 500 if (flower_mask & flower_flag_bit) { 501 *dissector_mask |= dissector_flag_bit; 502 if (flower_key & flower_flag_bit) 503 *dissector_key |= dissector_flag_bit; 504 } 505 } 506 507 static int fl_set_key_flags(struct nlattr **tb, 508 u32 *flags_key, u32 *flags_mask) 509 { 510 u32 key, mask; 511 512 /* mask is mandatory for flags */ 513 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 514 return -EINVAL; 515 516 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 517 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 518 519 *flags_key = 0; 520 *flags_mask = 0; 521 522 fl_set_key_flag(key, mask, flags_key, flags_mask, 523 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 524 525 return 0; 526 } 527 528 static int fl_set_key(struct net *net, struct nlattr **tb, 529 struct fl_flow_key *key, struct fl_flow_key *mask) 530 { 531 __be16 ethertype; 532 int ret = 0; 533 #ifdef CONFIG_NET_CLS_IND 534 if (tb[TCA_FLOWER_INDEV]) { 535 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); 536 if (err < 0) 537 return err; 538 key->indev_ifindex = err; 539 mask->indev_ifindex = 0xffffffff; 540 } 541 #endif 542 543 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 544 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 545 sizeof(key->eth.dst)); 546 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 547 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 548 sizeof(key->eth.src)); 549 550 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 551 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 552 553 if (ethertype == htons(ETH_P_8021Q)) { 554 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 555 fl_set_key_val(tb, &key->basic.n_proto, 556 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 557 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 558 sizeof(key->basic.n_proto)); 559 } else { 560 key->basic.n_proto = ethertype; 561 mask->basic.n_proto = cpu_to_be16(~0); 562 } 563 } 564 565 if (key->basic.n_proto == htons(ETH_P_IP) || 566 key->basic.n_proto == htons(ETH_P_IPV6)) { 567 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 568 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 569 sizeof(key->basic.ip_proto)); 570 } 571 572 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 573 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 574 mask->control.addr_type = ~0; 575 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 576 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 577 sizeof(key->ipv4.src)); 578 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 579 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 580 sizeof(key->ipv4.dst)); 581 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 582 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 583 mask->control.addr_type = ~0; 584 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 585 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 586 sizeof(key->ipv6.src)); 587 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 588 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 589 sizeof(key->ipv6.dst)); 590 } 591 592 if (key->basic.ip_proto == IPPROTO_TCP) { 593 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 594 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 595 sizeof(key->tp.src)); 596 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 597 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 598 sizeof(key->tp.dst)); 599 } else if (key->basic.ip_proto == IPPROTO_UDP) { 600 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 601 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 602 sizeof(key->tp.src)); 603 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 604 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 605 sizeof(key->tp.dst)); 606 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 607 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 608 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 609 sizeof(key->tp.src)); 610 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 611 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 612 sizeof(key->tp.dst)); 613 } else if (key->basic.n_proto == htons(ETH_P_IP) && 614 key->basic.ip_proto == IPPROTO_ICMP) { 615 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 616 &mask->icmp.type, 617 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 618 sizeof(key->icmp.type)); 619 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 620 &mask->icmp.code, 621 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 622 sizeof(key->icmp.code)); 623 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 624 key->basic.ip_proto == IPPROTO_ICMPV6) { 625 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 626 &mask->icmp.type, 627 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 628 sizeof(key->icmp.type)); 629 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 630 &mask->icmp.code, 631 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 632 sizeof(key->icmp.code)); 633 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 634 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 635 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 636 if (ret) 637 return ret; 638 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 639 key->basic.n_proto == htons(ETH_P_RARP)) { 640 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 641 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 642 sizeof(key->arp.sip)); 643 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 644 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 645 sizeof(key->arp.tip)); 646 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 647 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 648 sizeof(key->arp.op)); 649 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 650 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 651 sizeof(key->arp.sha)); 652 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 653 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 654 sizeof(key->arp.tha)); 655 } 656 657 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 658 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 659 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 660 mask->enc_control.addr_type = ~0; 661 fl_set_key_val(tb, &key->enc_ipv4.src, 662 TCA_FLOWER_KEY_ENC_IPV4_SRC, 663 &mask->enc_ipv4.src, 664 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 665 sizeof(key->enc_ipv4.src)); 666 fl_set_key_val(tb, &key->enc_ipv4.dst, 667 TCA_FLOWER_KEY_ENC_IPV4_DST, 668 &mask->enc_ipv4.dst, 669 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 670 sizeof(key->enc_ipv4.dst)); 671 } 672 673 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 674 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 675 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 676 mask->enc_control.addr_type = ~0; 677 fl_set_key_val(tb, &key->enc_ipv6.src, 678 TCA_FLOWER_KEY_ENC_IPV6_SRC, 679 &mask->enc_ipv6.src, 680 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 681 sizeof(key->enc_ipv6.src)); 682 fl_set_key_val(tb, &key->enc_ipv6.dst, 683 TCA_FLOWER_KEY_ENC_IPV6_DST, 684 &mask->enc_ipv6.dst, 685 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 686 sizeof(key->enc_ipv6.dst)); 687 } 688 689 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 690 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 691 sizeof(key->enc_key_id.keyid)); 692 693 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 694 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 695 sizeof(key->enc_tp.src)); 696 697 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 698 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 699 sizeof(key->enc_tp.dst)); 700 701 if (tb[TCA_FLOWER_KEY_FLAGS]) 702 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 703 704 return ret; 705 } 706 707 static bool fl_mask_eq(struct fl_flow_mask *mask1, 708 struct fl_flow_mask *mask2) 709 { 710 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 711 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 712 713 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 714 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 715 } 716 717 static const struct rhashtable_params fl_ht_params = { 718 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 719 .head_offset = offsetof(struct cls_fl_filter, ht_node), 720 .automatic_shrinking = true, 721 }; 722 723 static int fl_init_hashtable(struct cls_fl_head *head, 724 struct fl_flow_mask *mask) 725 { 726 head->ht_params = fl_ht_params; 727 head->ht_params.key_len = fl_mask_range(mask); 728 head->ht_params.key_offset += mask->range.start; 729 730 return rhashtable_init(&head->ht, &head->ht_params); 731 } 732 733 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 734 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 735 736 #define FL_KEY_IS_MASKED(mask, member) \ 737 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 738 0, FL_KEY_MEMBER_SIZE(member)) \ 739 740 #define FL_KEY_SET(keys, cnt, id, member) \ 741 do { \ 742 keys[cnt].key_id = id; \ 743 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 744 cnt++; \ 745 } while(0); 746 747 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 748 do { \ 749 if (FL_KEY_IS_MASKED(mask, member)) \ 750 FL_KEY_SET(keys, cnt, id, member); \ 751 } while(0); 752 753 static void fl_init_dissector(struct cls_fl_head *head, 754 struct fl_flow_mask *mask) 755 { 756 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 757 size_t cnt = 0; 758 759 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 760 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 761 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 762 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 763 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 764 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 765 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 766 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 767 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 768 FLOW_DISSECTOR_KEY_PORTS, tp); 769 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 770 FLOW_DISSECTOR_KEY_ICMP, icmp); 771 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 772 FLOW_DISSECTOR_KEY_ARP, arp); 773 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 774 FLOW_DISSECTOR_KEY_MPLS, mpls); 775 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 776 FLOW_DISSECTOR_KEY_VLAN, vlan); 777 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 778 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 779 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 780 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 781 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 782 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 783 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 784 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 785 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 786 enc_control); 787 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 788 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 789 790 skb_flow_dissector_init(&head->dissector, keys, cnt); 791 } 792 793 static int fl_check_assign_mask(struct cls_fl_head *head, 794 struct fl_flow_mask *mask) 795 { 796 int err; 797 798 if (head->mask_assigned) { 799 if (!fl_mask_eq(&head->mask, mask)) 800 return -EINVAL; 801 else 802 return 0; 803 } 804 805 /* Mask is not assigned yet. So assign it and init hashtable 806 * according to that. 807 */ 808 err = fl_init_hashtable(head, mask); 809 if (err) 810 return err; 811 memcpy(&head->mask, mask, sizeof(head->mask)); 812 head->mask_assigned = true; 813 814 fl_init_dissector(head, mask); 815 816 return 0; 817 } 818 819 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 820 struct cls_fl_filter *f, struct fl_flow_mask *mask, 821 unsigned long base, struct nlattr **tb, 822 struct nlattr *est, bool ovr) 823 { 824 struct tcf_exts e; 825 int err; 826 827 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); 828 if (err < 0) 829 return err; 830 err = tcf_exts_validate(net, tp, tb, est, &e, ovr); 831 if (err < 0) 832 goto errout; 833 834 if (tb[TCA_FLOWER_CLASSID]) { 835 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 836 tcf_bind_filter(tp, &f->res, base); 837 } 838 839 err = fl_set_key(net, tb, &f->key, &mask->key); 840 if (err) 841 goto errout; 842 843 fl_mask_update_range(mask); 844 fl_set_masked_key(&f->mkey, &f->key, mask); 845 846 tcf_exts_change(tp, &f->exts, &e); 847 848 return 0; 849 errout: 850 tcf_exts_destroy(&e); 851 return err; 852 } 853 854 static u32 fl_grab_new_handle(struct tcf_proto *tp, 855 struct cls_fl_head *head) 856 { 857 unsigned int i = 0x80000000; 858 u32 handle; 859 860 do { 861 if (++head->hgen == 0x7FFFFFFF) 862 head->hgen = 1; 863 } while (--i > 0 && fl_get(tp, head->hgen)); 864 865 if (unlikely(i == 0)) { 866 pr_err("Insufficient number of handles\n"); 867 handle = 0; 868 } else { 869 handle = head->hgen; 870 } 871 872 return handle; 873 } 874 875 static int fl_change(struct net *net, struct sk_buff *in_skb, 876 struct tcf_proto *tp, unsigned long base, 877 u32 handle, struct nlattr **tca, 878 unsigned long *arg, bool ovr) 879 { 880 struct cls_fl_head *head = rtnl_dereference(tp->root); 881 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; 882 struct cls_fl_filter *fnew; 883 struct nlattr **tb; 884 struct fl_flow_mask mask = {}; 885 int err; 886 887 if (!tca[TCA_OPTIONS]) 888 return -EINVAL; 889 890 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 891 if (!tb) 892 return -ENOBUFS; 893 894 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 895 fl_policy, NULL); 896 if (err < 0) 897 goto errout_tb; 898 899 if (fold && handle && fold->handle != handle) { 900 err = -EINVAL; 901 goto errout_tb; 902 } 903 904 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 905 if (!fnew) { 906 err = -ENOBUFS; 907 goto errout_tb; 908 } 909 910 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 911 if (err < 0) 912 goto errout; 913 914 if (!handle) { 915 handle = fl_grab_new_handle(tp, head); 916 if (!handle) { 917 err = -EINVAL; 918 goto errout; 919 } 920 } 921 fnew->handle = handle; 922 923 if (tb[TCA_FLOWER_FLAGS]) { 924 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 925 926 if (!tc_flags_valid(fnew->flags)) { 927 err = -EINVAL; 928 goto errout; 929 } 930 } 931 932 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 933 if (err) 934 goto errout; 935 936 err = fl_check_assign_mask(head, &mask); 937 if (err) 938 goto errout; 939 940 if (!tc_skip_sw(fnew->flags)) { 941 if (!fold && fl_lookup(head, &fnew->mkey)) { 942 err = -EEXIST; 943 goto errout; 944 } 945 946 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 947 head->ht_params); 948 if (err) 949 goto errout; 950 } 951 952 if (!tc_skip_hw(fnew->flags)) { 953 err = fl_hw_replace_filter(tp, 954 &head->dissector, 955 &mask.key, 956 fnew); 957 if (err) 958 goto errout; 959 } 960 961 if (!tc_in_hw(fnew->flags)) 962 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 963 964 if (fold) { 965 if (!tc_skip_sw(fold->flags)) 966 rhashtable_remove_fast(&head->ht, &fold->ht_node, 967 head->ht_params); 968 if (!tc_skip_hw(fold->flags)) 969 fl_hw_destroy_filter(tp, fold); 970 } 971 972 *arg = (unsigned long) fnew; 973 974 if (fold) { 975 list_replace_rcu(&fold->list, &fnew->list); 976 tcf_unbind_filter(tp, &fold->res); 977 call_rcu(&fold->rcu, fl_destroy_filter); 978 } else { 979 list_add_tail_rcu(&fnew->list, &head->filters); 980 } 981 982 kfree(tb); 983 return 0; 984 985 errout: 986 tcf_exts_destroy(&fnew->exts); 987 kfree(fnew); 988 errout_tb: 989 kfree(tb); 990 return err; 991 } 992 993 static int fl_delete(struct tcf_proto *tp, unsigned long arg, bool *last) 994 { 995 struct cls_fl_head *head = rtnl_dereference(tp->root); 996 struct cls_fl_filter *f = (struct cls_fl_filter *) arg; 997 998 if (!tc_skip_sw(f->flags)) 999 rhashtable_remove_fast(&head->ht, &f->ht_node, 1000 head->ht_params); 1001 __fl_delete(tp, f); 1002 *last = list_empty(&head->filters); 1003 return 0; 1004 } 1005 1006 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1007 { 1008 struct cls_fl_head *head = rtnl_dereference(tp->root); 1009 struct cls_fl_filter *f; 1010 1011 list_for_each_entry_rcu(f, &head->filters, list) { 1012 if (arg->count < arg->skip) 1013 goto skip; 1014 if (arg->fn(tp, (unsigned long) f, arg) < 0) { 1015 arg->stop = 1; 1016 break; 1017 } 1018 skip: 1019 arg->count++; 1020 } 1021 } 1022 1023 static int fl_dump_key_val(struct sk_buff *skb, 1024 void *val, int val_type, 1025 void *mask, int mask_type, int len) 1026 { 1027 int err; 1028 1029 if (!memchr_inv(mask, 0, len)) 1030 return 0; 1031 err = nla_put(skb, val_type, len, val); 1032 if (err) 1033 return err; 1034 if (mask_type != TCA_FLOWER_UNSPEC) { 1035 err = nla_put(skb, mask_type, len, mask); 1036 if (err) 1037 return err; 1038 } 1039 return 0; 1040 } 1041 1042 static int fl_dump_key_mpls(struct sk_buff *skb, 1043 struct flow_dissector_key_mpls *mpls_key, 1044 struct flow_dissector_key_mpls *mpls_mask) 1045 { 1046 int err; 1047 1048 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1049 return 0; 1050 if (mpls_mask->mpls_ttl) { 1051 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1052 mpls_key->mpls_ttl); 1053 if (err) 1054 return err; 1055 } 1056 if (mpls_mask->mpls_tc) { 1057 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1058 mpls_key->mpls_tc); 1059 if (err) 1060 return err; 1061 } 1062 if (mpls_mask->mpls_label) { 1063 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1064 mpls_key->mpls_label); 1065 if (err) 1066 return err; 1067 } 1068 if (mpls_mask->mpls_bos) { 1069 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1070 mpls_key->mpls_bos); 1071 if (err) 1072 return err; 1073 } 1074 return 0; 1075 } 1076 1077 static int fl_dump_key_vlan(struct sk_buff *skb, 1078 struct flow_dissector_key_vlan *vlan_key, 1079 struct flow_dissector_key_vlan *vlan_mask) 1080 { 1081 int err; 1082 1083 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1084 return 0; 1085 if (vlan_mask->vlan_id) { 1086 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 1087 vlan_key->vlan_id); 1088 if (err) 1089 return err; 1090 } 1091 if (vlan_mask->vlan_priority) { 1092 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 1093 vlan_key->vlan_priority); 1094 if (err) 1095 return err; 1096 } 1097 return 0; 1098 } 1099 1100 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1101 u32 *flower_key, u32 *flower_mask, 1102 u32 flower_flag_bit, u32 dissector_flag_bit) 1103 { 1104 if (dissector_mask & dissector_flag_bit) { 1105 *flower_mask |= flower_flag_bit; 1106 if (dissector_key & dissector_flag_bit) 1107 *flower_key |= flower_flag_bit; 1108 } 1109 } 1110 1111 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1112 { 1113 u32 key, mask; 1114 __be32 _key, _mask; 1115 int err; 1116 1117 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1118 return 0; 1119 1120 key = 0; 1121 mask = 0; 1122 1123 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1124 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1125 1126 _key = cpu_to_be32(key); 1127 _mask = cpu_to_be32(mask); 1128 1129 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1130 if (err) 1131 return err; 1132 1133 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1134 } 1135 1136 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, 1137 struct sk_buff *skb, struct tcmsg *t) 1138 { 1139 struct cls_fl_head *head = rtnl_dereference(tp->root); 1140 struct cls_fl_filter *f = (struct cls_fl_filter *) fh; 1141 struct nlattr *nest; 1142 struct fl_flow_key *key, *mask; 1143 1144 if (!f) 1145 return skb->len; 1146 1147 t->tcm_handle = f->handle; 1148 1149 nest = nla_nest_start(skb, TCA_OPTIONS); 1150 if (!nest) 1151 goto nla_put_failure; 1152 1153 if (f->res.classid && 1154 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1155 goto nla_put_failure; 1156 1157 key = &f->key; 1158 mask = &head->mask.key; 1159 1160 if (mask->indev_ifindex) { 1161 struct net_device *dev; 1162 1163 dev = __dev_get_by_index(net, key->indev_ifindex); 1164 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1165 goto nla_put_failure; 1166 } 1167 1168 if (!tc_skip_hw(f->flags)) 1169 fl_hw_update_stats(tp, f); 1170 1171 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1172 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1173 sizeof(key->eth.dst)) || 1174 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1175 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1176 sizeof(key->eth.src)) || 1177 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1178 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1179 sizeof(key->basic.n_proto))) 1180 goto nla_put_failure; 1181 1182 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1183 goto nla_put_failure; 1184 1185 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1186 goto nla_put_failure; 1187 1188 if ((key->basic.n_proto == htons(ETH_P_IP) || 1189 key->basic.n_proto == htons(ETH_P_IPV6)) && 1190 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1191 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1192 sizeof(key->basic.ip_proto))) 1193 goto nla_put_failure; 1194 1195 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1196 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1197 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1198 sizeof(key->ipv4.src)) || 1199 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1200 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1201 sizeof(key->ipv4.dst)))) 1202 goto nla_put_failure; 1203 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1204 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1205 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1206 sizeof(key->ipv6.src)) || 1207 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1208 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1209 sizeof(key->ipv6.dst)))) 1210 goto nla_put_failure; 1211 1212 if (key->basic.ip_proto == IPPROTO_TCP && 1213 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1214 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1215 sizeof(key->tp.src)) || 1216 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1217 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1218 sizeof(key->tp.dst)))) 1219 goto nla_put_failure; 1220 else if (key->basic.ip_proto == IPPROTO_UDP && 1221 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1222 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1223 sizeof(key->tp.src)) || 1224 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1225 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1226 sizeof(key->tp.dst)))) 1227 goto nla_put_failure; 1228 else if (key->basic.ip_proto == IPPROTO_SCTP && 1229 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1230 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1231 sizeof(key->tp.src)) || 1232 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1233 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1234 sizeof(key->tp.dst)))) 1235 goto nla_put_failure; 1236 else if (key->basic.n_proto == htons(ETH_P_IP) && 1237 key->basic.ip_proto == IPPROTO_ICMP && 1238 (fl_dump_key_val(skb, &key->icmp.type, 1239 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1240 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1241 sizeof(key->icmp.type)) || 1242 fl_dump_key_val(skb, &key->icmp.code, 1243 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1244 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1245 sizeof(key->icmp.code)))) 1246 goto nla_put_failure; 1247 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1248 key->basic.ip_proto == IPPROTO_ICMPV6 && 1249 (fl_dump_key_val(skb, &key->icmp.type, 1250 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1251 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1252 sizeof(key->icmp.type)) || 1253 fl_dump_key_val(skb, &key->icmp.code, 1254 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1255 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1256 sizeof(key->icmp.code)))) 1257 goto nla_put_failure; 1258 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1259 key->basic.n_proto == htons(ETH_P_RARP)) && 1260 (fl_dump_key_val(skb, &key->arp.sip, 1261 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1262 TCA_FLOWER_KEY_ARP_SIP_MASK, 1263 sizeof(key->arp.sip)) || 1264 fl_dump_key_val(skb, &key->arp.tip, 1265 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1266 TCA_FLOWER_KEY_ARP_TIP_MASK, 1267 sizeof(key->arp.tip)) || 1268 fl_dump_key_val(skb, &key->arp.op, 1269 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1270 TCA_FLOWER_KEY_ARP_OP_MASK, 1271 sizeof(key->arp.op)) || 1272 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1273 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1274 sizeof(key->arp.sha)) || 1275 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1276 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1277 sizeof(key->arp.tha)))) 1278 goto nla_put_failure; 1279 1280 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1281 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1282 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1283 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1284 sizeof(key->enc_ipv4.src)) || 1285 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1286 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1287 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1288 sizeof(key->enc_ipv4.dst)))) 1289 goto nla_put_failure; 1290 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1291 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1292 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1293 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1294 sizeof(key->enc_ipv6.src)) || 1295 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1296 TCA_FLOWER_KEY_ENC_IPV6_DST, 1297 &mask->enc_ipv6.dst, 1298 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1299 sizeof(key->enc_ipv6.dst)))) 1300 goto nla_put_failure; 1301 1302 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1303 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1304 sizeof(key->enc_key_id)) || 1305 fl_dump_key_val(skb, &key->enc_tp.src, 1306 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1307 &mask->enc_tp.src, 1308 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1309 sizeof(key->enc_tp.src)) || 1310 fl_dump_key_val(skb, &key->enc_tp.dst, 1311 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1312 &mask->enc_tp.dst, 1313 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1314 sizeof(key->enc_tp.dst))) 1315 goto nla_put_failure; 1316 1317 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1318 goto nla_put_failure; 1319 1320 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1321 goto nla_put_failure; 1322 1323 if (tcf_exts_dump(skb, &f->exts)) 1324 goto nla_put_failure; 1325 1326 nla_nest_end(skb, nest); 1327 1328 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1329 goto nla_put_failure; 1330 1331 return skb->len; 1332 1333 nla_put_failure: 1334 nla_nest_cancel(skb, nest); 1335 return -1; 1336 } 1337 1338 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1339 .kind = "flower", 1340 .classify = fl_classify, 1341 .init = fl_init, 1342 .destroy = fl_destroy, 1343 .get = fl_get, 1344 .change = fl_change, 1345 .delete = fl_delete, 1346 .walk = fl_walk, 1347 .dump = fl_dump, 1348 .owner = THIS_MODULE, 1349 }; 1350 1351 static int __init cls_fl_init(void) 1352 { 1353 return register_tcf_proto_ops(&cls_fl_ops); 1354 } 1355 1356 static void __exit cls_fl_exit(void) 1357 { 1358 unregister_tcf_proto_ops(&cls_fl_ops); 1359 } 1360 1361 module_init(cls_fl_init); 1362 module_exit(cls_fl_exit); 1363 1364 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1365 MODULE_DESCRIPTION("Flower classifier"); 1366 MODULE_LICENSE("GPL v2"); 1367