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 22 #include <net/sch_generic.h> 23 #include <net/pkt_cls.h> 24 #include <net/ip.h> 25 #include <net/flow_dissector.h> 26 27 #include <net/dst.h> 28 #include <net/dst_metadata.h> 29 30 struct fl_flow_key { 31 int indev_ifindex; 32 struct flow_dissector_key_control control; 33 struct flow_dissector_key_control enc_control; 34 struct flow_dissector_key_basic basic; 35 struct flow_dissector_key_eth_addrs eth; 36 struct flow_dissector_key_vlan vlan; 37 union { 38 struct flow_dissector_key_ipv4_addrs ipv4; 39 struct flow_dissector_key_ipv6_addrs ipv6; 40 }; 41 struct flow_dissector_key_ports tp; 42 struct flow_dissector_key_icmp icmp; 43 struct flow_dissector_key_arp arp; 44 struct flow_dissector_key_keyid enc_key_id; 45 union { 46 struct flow_dissector_key_ipv4_addrs enc_ipv4; 47 struct flow_dissector_key_ipv6_addrs enc_ipv6; 48 }; 49 struct flow_dissector_key_ports enc_tp; 50 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 51 52 struct fl_flow_mask_range { 53 unsigned short int start; 54 unsigned short int end; 55 }; 56 57 struct fl_flow_mask { 58 struct fl_flow_key key; 59 struct fl_flow_mask_range range; 60 struct rcu_head rcu; 61 }; 62 63 struct cls_fl_head { 64 struct rhashtable ht; 65 struct fl_flow_mask mask; 66 struct flow_dissector dissector; 67 u32 hgen; 68 bool mask_assigned; 69 struct list_head filters; 70 struct rhashtable_params ht_params; 71 union { 72 struct work_struct work; 73 struct rcu_head rcu; 74 }; 75 }; 76 77 struct cls_fl_filter { 78 struct rhash_head ht_node; 79 struct fl_flow_key mkey; 80 struct tcf_exts exts; 81 struct tcf_result res; 82 struct fl_flow_key key; 83 struct list_head list; 84 u32 handle; 85 u32 flags; 86 struct rcu_head rcu; 87 struct tc_to_netdev tc; 88 struct net_device *hw_dev; 89 }; 90 91 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 92 { 93 return mask->range.end - mask->range.start; 94 } 95 96 static void fl_mask_update_range(struct fl_flow_mask *mask) 97 { 98 const u8 *bytes = (const u8 *) &mask->key; 99 size_t size = sizeof(mask->key); 100 size_t i, first = 0, last = size - 1; 101 102 for (i = 0; i < sizeof(mask->key); i++) { 103 if (bytes[i]) { 104 if (!first && i) 105 first = i; 106 last = i; 107 } 108 } 109 mask->range.start = rounddown(first, sizeof(long)); 110 mask->range.end = roundup(last + 1, sizeof(long)); 111 } 112 113 static void *fl_key_get_start(struct fl_flow_key *key, 114 const struct fl_flow_mask *mask) 115 { 116 return (u8 *) key + mask->range.start; 117 } 118 119 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 120 struct fl_flow_mask *mask) 121 { 122 const long *lkey = fl_key_get_start(key, mask); 123 const long *lmask = fl_key_get_start(&mask->key, mask); 124 long *lmkey = fl_key_get_start(mkey, mask); 125 int i; 126 127 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 128 *lmkey++ = *lkey++ & *lmask++; 129 } 130 131 static void fl_clear_masked_range(struct fl_flow_key *key, 132 struct fl_flow_mask *mask) 133 { 134 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 135 } 136 137 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head, 138 struct fl_flow_key *mkey) 139 { 140 return rhashtable_lookup_fast(&head->ht, 141 fl_key_get_start(mkey, &head->mask), 142 head->ht_params); 143 } 144 145 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 146 struct tcf_result *res) 147 { 148 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 149 struct cls_fl_filter *f; 150 struct fl_flow_key skb_key; 151 struct fl_flow_key skb_mkey; 152 struct ip_tunnel_info *info; 153 154 if (!atomic_read(&head->ht.nelems)) 155 return -1; 156 157 fl_clear_masked_range(&skb_key, &head->mask); 158 159 info = skb_tunnel_info(skb); 160 if (info) { 161 struct ip_tunnel_key *key = &info->key; 162 163 switch (ip_tunnel_info_af(info)) { 164 case AF_INET: 165 skb_key.enc_control.addr_type = 166 FLOW_DISSECTOR_KEY_IPV4_ADDRS; 167 skb_key.enc_ipv4.src = key->u.ipv4.src; 168 skb_key.enc_ipv4.dst = key->u.ipv4.dst; 169 break; 170 case AF_INET6: 171 skb_key.enc_control.addr_type = 172 FLOW_DISSECTOR_KEY_IPV6_ADDRS; 173 skb_key.enc_ipv6.src = key->u.ipv6.src; 174 skb_key.enc_ipv6.dst = key->u.ipv6.dst; 175 break; 176 } 177 178 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); 179 skb_key.enc_tp.src = key->tp_src; 180 skb_key.enc_tp.dst = key->tp_dst; 181 } 182 183 skb_key.indev_ifindex = skb->skb_iif; 184 /* skb_flow_dissect() does not set n_proto in case an unknown protocol, 185 * so do it rather here. 186 */ 187 skb_key.basic.n_proto = skb->protocol; 188 skb_flow_dissect(skb, &head->dissector, &skb_key, 0); 189 190 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); 191 192 f = fl_lookup(head, &skb_mkey); 193 if (f && !tc_skip_sw(f->flags)) { 194 *res = f->res; 195 return tcf_exts_exec(skb, &f->exts, res); 196 } 197 return -1; 198 } 199 200 static int fl_init(struct tcf_proto *tp) 201 { 202 struct cls_fl_head *head; 203 204 head = kzalloc(sizeof(*head), GFP_KERNEL); 205 if (!head) 206 return -ENOBUFS; 207 208 INIT_LIST_HEAD_RCU(&head->filters); 209 rcu_assign_pointer(tp->root, head); 210 211 return 0; 212 } 213 214 static void fl_destroy_filter(struct rcu_head *head) 215 { 216 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); 217 218 tcf_exts_destroy(&f->exts); 219 kfree(f); 220 } 221 222 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) 223 { 224 struct tc_cls_flower_offload offload = {0}; 225 struct net_device *dev = f->hw_dev; 226 struct tc_to_netdev *tc = &f->tc; 227 228 if (!tc_can_offload(dev, tp)) 229 return; 230 231 offload.command = TC_CLSFLOWER_DESTROY; 232 offload.prio = tp->prio; 233 offload.cookie = (unsigned long)f; 234 235 tc->type = TC_SETUP_CLSFLOWER; 236 tc->cls_flower = &offload; 237 238 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); 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 offload = {0}; 248 struct tc_to_netdev *tc = &f->tc; 249 int err; 250 251 if (!tc_can_offload(dev, tp)) { 252 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || 253 (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) { 254 f->hw_dev = dev; 255 return tc_skip_sw(f->flags) ? -EINVAL : 0; 256 } 257 dev = f->hw_dev; 258 tc->egress_dev = true; 259 } else { 260 f->hw_dev = dev; 261 } 262 263 offload.command = TC_CLSFLOWER_REPLACE; 264 offload.prio = tp->prio; 265 offload.cookie = (unsigned long)f; 266 offload.dissector = dissector; 267 offload.mask = mask; 268 offload.key = &f->mkey; 269 offload.exts = &f->exts; 270 271 tc->type = TC_SETUP_CLSFLOWER; 272 tc->cls_flower = &offload; 273 274 err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, 275 tc); 276 if (!err) 277 f->flags |= TCA_CLS_FLAGS_IN_HW; 278 279 if (tc_skip_sw(f->flags)) 280 return err; 281 return 0; 282 } 283 284 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 285 { 286 struct tc_cls_flower_offload offload = {0}; 287 struct net_device *dev = f->hw_dev; 288 struct tc_to_netdev *tc = &f->tc; 289 290 if (!tc_can_offload(dev, tp)) 291 return; 292 293 offload.command = TC_CLSFLOWER_STATS; 294 offload.prio = tp->prio; 295 offload.cookie = (unsigned long)f; 296 offload.exts = &f->exts; 297 298 tc->type = TC_SETUP_CLSFLOWER; 299 tc->cls_flower = &offload; 300 301 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); 302 } 303 304 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) 305 { 306 list_del_rcu(&f->list); 307 if (!tc_skip_hw(f->flags)) 308 fl_hw_destroy_filter(tp, f); 309 tcf_unbind_filter(tp, &f->res); 310 call_rcu(&f->rcu, fl_destroy_filter); 311 } 312 313 static void fl_destroy_sleepable(struct work_struct *work) 314 { 315 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 316 work); 317 if (head->mask_assigned) 318 rhashtable_destroy(&head->ht); 319 kfree(head); 320 module_put(THIS_MODULE); 321 } 322 323 static void fl_destroy_rcu(struct rcu_head *rcu) 324 { 325 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 326 327 INIT_WORK(&head->work, fl_destroy_sleepable); 328 schedule_work(&head->work); 329 } 330 331 static bool fl_destroy(struct tcf_proto *tp, bool force) 332 { 333 struct cls_fl_head *head = rtnl_dereference(tp->root); 334 struct cls_fl_filter *f, *next; 335 336 if (!force && !list_empty(&head->filters)) 337 return false; 338 339 list_for_each_entry_safe(f, next, &head->filters, list) 340 __fl_delete(tp, f); 341 342 __module_get(THIS_MODULE); 343 call_rcu(&head->rcu, fl_destroy_rcu); 344 345 return true; 346 } 347 348 static unsigned long fl_get(struct tcf_proto *tp, u32 handle) 349 { 350 struct cls_fl_head *head = rtnl_dereference(tp->root); 351 struct cls_fl_filter *f; 352 353 list_for_each_entry(f, &head->filters, list) 354 if (f->handle == handle) 355 return (unsigned long) f; 356 return 0; 357 } 358 359 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 360 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 361 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 362 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 363 .len = IFNAMSIZ }, 364 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 365 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 366 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 367 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 368 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 369 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 370 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 371 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 372 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 373 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 374 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 375 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 376 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 377 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 378 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 379 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 380 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 381 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 382 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 383 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 384 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 385 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 386 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 387 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 388 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 389 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 390 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 391 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 392 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 393 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 394 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 395 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 396 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 397 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 398 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 399 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 400 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 401 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 402 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 403 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 404 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 405 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 406 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 407 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 408 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 409 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 410 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 411 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 412 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 413 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 414 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 415 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 416 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 417 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 418 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 419 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 420 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 421 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 422 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 423 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 424 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 425 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 426 }; 427 428 static void fl_set_key_val(struct nlattr **tb, 429 void *val, int val_type, 430 void *mask, int mask_type, int len) 431 { 432 if (!tb[val_type]) 433 return; 434 memcpy(val, nla_data(tb[val_type]), len); 435 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 436 memset(mask, 0xff, len); 437 else 438 memcpy(mask, nla_data(tb[mask_type]), len); 439 } 440 441 static void fl_set_key_vlan(struct nlattr **tb, 442 struct flow_dissector_key_vlan *key_val, 443 struct flow_dissector_key_vlan *key_mask) 444 { 445 #define VLAN_PRIORITY_MASK 0x7 446 447 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 448 key_val->vlan_id = 449 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 450 key_mask->vlan_id = VLAN_VID_MASK; 451 } 452 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 453 key_val->vlan_priority = 454 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 455 VLAN_PRIORITY_MASK; 456 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 457 } 458 } 459 460 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 461 u32 *dissector_key, u32 *dissector_mask, 462 u32 flower_flag_bit, u32 dissector_flag_bit) 463 { 464 if (flower_mask & flower_flag_bit) { 465 *dissector_mask |= dissector_flag_bit; 466 if (flower_key & flower_flag_bit) 467 *dissector_key |= dissector_flag_bit; 468 } 469 } 470 471 static int fl_set_key_flags(struct nlattr **tb, 472 u32 *flags_key, u32 *flags_mask) 473 { 474 u32 key, mask; 475 476 /* mask is mandatory for flags */ 477 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 478 return -EINVAL; 479 480 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 481 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 482 483 *flags_key = 0; 484 *flags_mask = 0; 485 486 fl_set_key_flag(key, mask, flags_key, flags_mask, 487 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 488 489 return 0; 490 } 491 492 static int fl_set_key(struct net *net, struct nlattr **tb, 493 struct fl_flow_key *key, struct fl_flow_key *mask) 494 { 495 __be16 ethertype; 496 int ret = 0; 497 #ifdef CONFIG_NET_CLS_IND 498 if (tb[TCA_FLOWER_INDEV]) { 499 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); 500 if (err < 0) 501 return err; 502 key->indev_ifindex = err; 503 mask->indev_ifindex = 0xffffffff; 504 } 505 #endif 506 507 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 508 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 509 sizeof(key->eth.dst)); 510 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 511 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 512 sizeof(key->eth.src)); 513 514 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 515 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 516 517 if (ethertype == htons(ETH_P_8021Q)) { 518 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 519 fl_set_key_val(tb, &key->basic.n_proto, 520 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 521 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 522 sizeof(key->basic.n_proto)); 523 } else { 524 key->basic.n_proto = ethertype; 525 mask->basic.n_proto = cpu_to_be16(~0); 526 } 527 } 528 529 if (key->basic.n_proto == htons(ETH_P_IP) || 530 key->basic.n_proto == htons(ETH_P_IPV6)) { 531 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 532 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 533 sizeof(key->basic.ip_proto)); 534 } 535 536 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 537 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 538 mask->control.addr_type = ~0; 539 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 540 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 541 sizeof(key->ipv4.src)); 542 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 543 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 544 sizeof(key->ipv4.dst)); 545 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 546 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 547 mask->control.addr_type = ~0; 548 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 549 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 550 sizeof(key->ipv6.src)); 551 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 552 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 553 sizeof(key->ipv6.dst)); 554 } 555 556 if (key->basic.ip_proto == IPPROTO_TCP) { 557 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 558 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 559 sizeof(key->tp.src)); 560 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 561 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 562 sizeof(key->tp.dst)); 563 } else if (key->basic.ip_proto == IPPROTO_UDP) { 564 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 565 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 566 sizeof(key->tp.src)); 567 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 568 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 569 sizeof(key->tp.dst)); 570 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 571 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 572 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 573 sizeof(key->tp.src)); 574 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 575 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 576 sizeof(key->tp.dst)); 577 } else if (key->basic.n_proto == htons(ETH_P_IP) && 578 key->basic.ip_proto == IPPROTO_ICMP) { 579 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 580 &mask->icmp.type, 581 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 582 sizeof(key->icmp.type)); 583 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 584 &mask->icmp.code, 585 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 586 sizeof(key->icmp.code)); 587 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 588 key->basic.ip_proto == IPPROTO_ICMPV6) { 589 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 590 &mask->icmp.type, 591 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 592 sizeof(key->icmp.type)); 593 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 594 &mask->icmp.code, 595 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 596 sizeof(key->icmp.code)); 597 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 598 key->basic.n_proto == htons(ETH_P_RARP)) { 599 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 600 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 601 sizeof(key->arp.sip)); 602 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 603 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 604 sizeof(key->arp.tip)); 605 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 606 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 607 sizeof(key->arp.op)); 608 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 609 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 610 sizeof(key->arp.sha)); 611 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 612 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 613 sizeof(key->arp.tha)); 614 } 615 616 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 617 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 618 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 619 mask->enc_control.addr_type = ~0; 620 fl_set_key_val(tb, &key->enc_ipv4.src, 621 TCA_FLOWER_KEY_ENC_IPV4_SRC, 622 &mask->enc_ipv4.src, 623 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 624 sizeof(key->enc_ipv4.src)); 625 fl_set_key_val(tb, &key->enc_ipv4.dst, 626 TCA_FLOWER_KEY_ENC_IPV4_DST, 627 &mask->enc_ipv4.dst, 628 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 629 sizeof(key->enc_ipv4.dst)); 630 } 631 632 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 633 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 634 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 635 mask->enc_control.addr_type = ~0; 636 fl_set_key_val(tb, &key->enc_ipv6.src, 637 TCA_FLOWER_KEY_ENC_IPV6_SRC, 638 &mask->enc_ipv6.src, 639 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 640 sizeof(key->enc_ipv6.src)); 641 fl_set_key_val(tb, &key->enc_ipv6.dst, 642 TCA_FLOWER_KEY_ENC_IPV6_DST, 643 &mask->enc_ipv6.dst, 644 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 645 sizeof(key->enc_ipv6.dst)); 646 } 647 648 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 649 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 650 sizeof(key->enc_key_id.keyid)); 651 652 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 653 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 654 sizeof(key->enc_tp.src)); 655 656 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 657 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 658 sizeof(key->enc_tp.dst)); 659 660 if (tb[TCA_FLOWER_KEY_FLAGS]) 661 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 662 663 return ret; 664 } 665 666 static bool fl_mask_eq(struct fl_flow_mask *mask1, 667 struct fl_flow_mask *mask2) 668 { 669 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 670 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 671 672 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 673 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 674 } 675 676 static const struct rhashtable_params fl_ht_params = { 677 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 678 .head_offset = offsetof(struct cls_fl_filter, ht_node), 679 .automatic_shrinking = true, 680 }; 681 682 static int fl_init_hashtable(struct cls_fl_head *head, 683 struct fl_flow_mask *mask) 684 { 685 head->ht_params = fl_ht_params; 686 head->ht_params.key_len = fl_mask_range(mask); 687 head->ht_params.key_offset += mask->range.start; 688 689 return rhashtable_init(&head->ht, &head->ht_params); 690 } 691 692 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 693 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 694 695 #define FL_KEY_IS_MASKED(mask, member) \ 696 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 697 0, FL_KEY_MEMBER_SIZE(member)) \ 698 699 #define FL_KEY_SET(keys, cnt, id, member) \ 700 do { \ 701 keys[cnt].key_id = id; \ 702 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 703 cnt++; \ 704 } while(0); 705 706 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 707 do { \ 708 if (FL_KEY_IS_MASKED(mask, member)) \ 709 FL_KEY_SET(keys, cnt, id, member); \ 710 } while(0); 711 712 static void fl_init_dissector(struct cls_fl_head *head, 713 struct fl_flow_mask *mask) 714 { 715 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 716 size_t cnt = 0; 717 718 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 719 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 720 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 721 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 722 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 723 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 724 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 725 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 726 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 727 FLOW_DISSECTOR_KEY_PORTS, tp); 728 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 729 FLOW_DISSECTOR_KEY_ICMP, icmp); 730 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 731 FLOW_DISSECTOR_KEY_ARP, arp); 732 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 733 FLOW_DISSECTOR_KEY_VLAN, vlan); 734 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 735 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 736 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 737 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 738 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 739 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 740 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 741 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 742 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 743 enc_control); 744 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 745 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 746 747 skb_flow_dissector_init(&head->dissector, keys, cnt); 748 } 749 750 static int fl_check_assign_mask(struct cls_fl_head *head, 751 struct fl_flow_mask *mask) 752 { 753 int err; 754 755 if (head->mask_assigned) { 756 if (!fl_mask_eq(&head->mask, mask)) 757 return -EINVAL; 758 else 759 return 0; 760 } 761 762 /* Mask is not assigned yet. So assign it and init hashtable 763 * according to that. 764 */ 765 err = fl_init_hashtable(head, mask); 766 if (err) 767 return err; 768 memcpy(&head->mask, mask, sizeof(head->mask)); 769 head->mask_assigned = true; 770 771 fl_init_dissector(head, mask); 772 773 return 0; 774 } 775 776 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 777 struct cls_fl_filter *f, struct fl_flow_mask *mask, 778 unsigned long base, struct nlattr **tb, 779 struct nlattr *est, bool ovr) 780 { 781 struct tcf_exts e; 782 int err; 783 784 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); 785 if (err < 0) 786 return err; 787 err = tcf_exts_validate(net, tp, tb, est, &e, ovr); 788 if (err < 0) 789 goto errout; 790 791 if (tb[TCA_FLOWER_CLASSID]) { 792 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 793 tcf_bind_filter(tp, &f->res, base); 794 } 795 796 err = fl_set_key(net, tb, &f->key, &mask->key); 797 if (err) 798 goto errout; 799 800 fl_mask_update_range(mask); 801 fl_set_masked_key(&f->mkey, &f->key, mask); 802 803 tcf_exts_change(tp, &f->exts, &e); 804 805 return 0; 806 errout: 807 tcf_exts_destroy(&e); 808 return err; 809 } 810 811 static u32 fl_grab_new_handle(struct tcf_proto *tp, 812 struct cls_fl_head *head) 813 { 814 unsigned int i = 0x80000000; 815 u32 handle; 816 817 do { 818 if (++head->hgen == 0x7FFFFFFF) 819 head->hgen = 1; 820 } while (--i > 0 && fl_get(tp, head->hgen)); 821 822 if (unlikely(i == 0)) { 823 pr_err("Insufficient number of handles\n"); 824 handle = 0; 825 } else { 826 handle = head->hgen; 827 } 828 829 return handle; 830 } 831 832 static int fl_change(struct net *net, struct sk_buff *in_skb, 833 struct tcf_proto *tp, unsigned long base, 834 u32 handle, struct nlattr **tca, 835 unsigned long *arg, bool ovr) 836 { 837 struct cls_fl_head *head = rtnl_dereference(tp->root); 838 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; 839 struct cls_fl_filter *fnew; 840 struct nlattr **tb; 841 struct fl_flow_mask mask = {}; 842 int err; 843 844 if (!tca[TCA_OPTIONS]) 845 return -EINVAL; 846 847 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 848 if (!tb) 849 return -ENOBUFS; 850 851 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy); 852 if (err < 0) 853 goto errout_tb; 854 855 if (fold && handle && fold->handle != handle) { 856 err = -EINVAL; 857 goto errout_tb; 858 } 859 860 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 861 if (!fnew) { 862 err = -ENOBUFS; 863 goto errout_tb; 864 } 865 866 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 867 if (err < 0) 868 goto errout; 869 870 if (!handle) { 871 handle = fl_grab_new_handle(tp, head); 872 if (!handle) { 873 err = -EINVAL; 874 goto errout; 875 } 876 } 877 fnew->handle = handle; 878 879 if (tb[TCA_FLOWER_FLAGS]) { 880 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 881 882 if (!tc_flags_valid(fnew->flags)) { 883 err = -EINVAL; 884 goto errout; 885 } 886 } 887 888 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 889 if (err) 890 goto errout; 891 892 err = fl_check_assign_mask(head, &mask); 893 if (err) 894 goto errout; 895 896 if (!tc_skip_sw(fnew->flags)) { 897 if (!fold && fl_lookup(head, &fnew->mkey)) { 898 err = -EEXIST; 899 goto errout; 900 } 901 902 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 903 head->ht_params); 904 if (err) 905 goto errout; 906 } 907 908 if (!tc_skip_hw(fnew->flags)) { 909 err = fl_hw_replace_filter(tp, 910 &head->dissector, 911 &mask.key, 912 fnew); 913 if (err) 914 goto errout; 915 } 916 917 if (!tc_in_hw(fnew->flags)) 918 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 919 920 if (fold) { 921 if (!tc_skip_sw(fold->flags)) 922 rhashtable_remove_fast(&head->ht, &fold->ht_node, 923 head->ht_params); 924 if (!tc_skip_hw(fold->flags)) 925 fl_hw_destroy_filter(tp, fold); 926 } 927 928 *arg = (unsigned long) fnew; 929 930 if (fold) { 931 list_replace_rcu(&fold->list, &fnew->list); 932 tcf_unbind_filter(tp, &fold->res); 933 call_rcu(&fold->rcu, fl_destroy_filter); 934 } else { 935 list_add_tail_rcu(&fnew->list, &head->filters); 936 } 937 938 kfree(tb); 939 return 0; 940 941 errout: 942 tcf_exts_destroy(&fnew->exts); 943 kfree(fnew); 944 errout_tb: 945 kfree(tb); 946 return err; 947 } 948 949 static int fl_delete(struct tcf_proto *tp, unsigned long arg) 950 { 951 struct cls_fl_head *head = rtnl_dereference(tp->root); 952 struct cls_fl_filter *f = (struct cls_fl_filter *) arg; 953 954 if (!tc_skip_sw(f->flags)) 955 rhashtable_remove_fast(&head->ht, &f->ht_node, 956 head->ht_params); 957 __fl_delete(tp, f); 958 return 0; 959 } 960 961 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 962 { 963 struct cls_fl_head *head = rtnl_dereference(tp->root); 964 struct cls_fl_filter *f; 965 966 list_for_each_entry_rcu(f, &head->filters, list) { 967 if (arg->count < arg->skip) 968 goto skip; 969 if (arg->fn(tp, (unsigned long) f, arg) < 0) { 970 arg->stop = 1; 971 break; 972 } 973 skip: 974 arg->count++; 975 } 976 } 977 978 static int fl_dump_key_val(struct sk_buff *skb, 979 void *val, int val_type, 980 void *mask, int mask_type, int len) 981 { 982 int err; 983 984 if (!memchr_inv(mask, 0, len)) 985 return 0; 986 err = nla_put(skb, val_type, len, val); 987 if (err) 988 return err; 989 if (mask_type != TCA_FLOWER_UNSPEC) { 990 err = nla_put(skb, mask_type, len, mask); 991 if (err) 992 return err; 993 } 994 return 0; 995 } 996 997 static int fl_dump_key_vlan(struct sk_buff *skb, 998 struct flow_dissector_key_vlan *vlan_key, 999 struct flow_dissector_key_vlan *vlan_mask) 1000 { 1001 int err; 1002 1003 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1004 return 0; 1005 if (vlan_mask->vlan_id) { 1006 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 1007 vlan_key->vlan_id); 1008 if (err) 1009 return err; 1010 } 1011 if (vlan_mask->vlan_priority) { 1012 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 1013 vlan_key->vlan_priority); 1014 if (err) 1015 return err; 1016 } 1017 return 0; 1018 } 1019 1020 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1021 u32 *flower_key, u32 *flower_mask, 1022 u32 flower_flag_bit, u32 dissector_flag_bit) 1023 { 1024 if (dissector_mask & dissector_flag_bit) { 1025 *flower_mask |= flower_flag_bit; 1026 if (dissector_key & dissector_flag_bit) 1027 *flower_key |= flower_flag_bit; 1028 } 1029 } 1030 1031 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1032 { 1033 u32 key, mask; 1034 __be32 _key, _mask; 1035 int err; 1036 1037 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1038 return 0; 1039 1040 key = 0; 1041 mask = 0; 1042 1043 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1044 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1045 1046 _key = cpu_to_be32(key); 1047 _mask = cpu_to_be32(mask); 1048 1049 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1050 if (err) 1051 return err; 1052 1053 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1054 } 1055 1056 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, 1057 struct sk_buff *skb, struct tcmsg *t) 1058 { 1059 struct cls_fl_head *head = rtnl_dereference(tp->root); 1060 struct cls_fl_filter *f = (struct cls_fl_filter *) fh; 1061 struct nlattr *nest; 1062 struct fl_flow_key *key, *mask; 1063 1064 if (!f) 1065 return skb->len; 1066 1067 t->tcm_handle = f->handle; 1068 1069 nest = nla_nest_start(skb, TCA_OPTIONS); 1070 if (!nest) 1071 goto nla_put_failure; 1072 1073 if (f->res.classid && 1074 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1075 goto nla_put_failure; 1076 1077 key = &f->key; 1078 mask = &head->mask.key; 1079 1080 if (mask->indev_ifindex) { 1081 struct net_device *dev; 1082 1083 dev = __dev_get_by_index(net, key->indev_ifindex); 1084 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1085 goto nla_put_failure; 1086 } 1087 1088 if (!tc_skip_hw(f->flags)) 1089 fl_hw_update_stats(tp, f); 1090 1091 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1092 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1093 sizeof(key->eth.dst)) || 1094 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1095 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1096 sizeof(key->eth.src)) || 1097 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1098 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1099 sizeof(key->basic.n_proto))) 1100 goto nla_put_failure; 1101 1102 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1103 goto nla_put_failure; 1104 1105 if ((key->basic.n_proto == htons(ETH_P_IP) || 1106 key->basic.n_proto == htons(ETH_P_IPV6)) && 1107 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1108 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1109 sizeof(key->basic.ip_proto))) 1110 goto nla_put_failure; 1111 1112 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1113 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1114 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1115 sizeof(key->ipv4.src)) || 1116 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1117 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1118 sizeof(key->ipv4.dst)))) 1119 goto nla_put_failure; 1120 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1121 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1122 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1123 sizeof(key->ipv6.src)) || 1124 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1125 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1126 sizeof(key->ipv6.dst)))) 1127 goto nla_put_failure; 1128 1129 if (key->basic.ip_proto == IPPROTO_TCP && 1130 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1131 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1132 sizeof(key->tp.src)) || 1133 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1134 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1135 sizeof(key->tp.dst)))) 1136 goto nla_put_failure; 1137 else if (key->basic.ip_proto == IPPROTO_UDP && 1138 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1139 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1140 sizeof(key->tp.src)) || 1141 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1142 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1143 sizeof(key->tp.dst)))) 1144 goto nla_put_failure; 1145 else if (key->basic.ip_proto == IPPROTO_SCTP && 1146 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1147 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1148 sizeof(key->tp.src)) || 1149 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1150 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1151 sizeof(key->tp.dst)))) 1152 goto nla_put_failure; 1153 else if (key->basic.n_proto == htons(ETH_P_IP) && 1154 key->basic.ip_proto == IPPROTO_ICMP && 1155 (fl_dump_key_val(skb, &key->icmp.type, 1156 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1157 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1158 sizeof(key->icmp.type)) || 1159 fl_dump_key_val(skb, &key->icmp.code, 1160 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1161 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1162 sizeof(key->icmp.code)))) 1163 goto nla_put_failure; 1164 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1165 key->basic.ip_proto == IPPROTO_ICMPV6 && 1166 (fl_dump_key_val(skb, &key->icmp.type, 1167 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1168 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1169 sizeof(key->icmp.type)) || 1170 fl_dump_key_val(skb, &key->icmp.code, 1171 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1172 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1173 sizeof(key->icmp.code)))) 1174 goto nla_put_failure; 1175 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1176 key->basic.n_proto == htons(ETH_P_RARP)) && 1177 (fl_dump_key_val(skb, &key->arp.sip, 1178 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1179 TCA_FLOWER_KEY_ARP_SIP_MASK, 1180 sizeof(key->arp.sip)) || 1181 fl_dump_key_val(skb, &key->arp.tip, 1182 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1183 TCA_FLOWER_KEY_ARP_TIP_MASK, 1184 sizeof(key->arp.tip)) || 1185 fl_dump_key_val(skb, &key->arp.op, 1186 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1187 TCA_FLOWER_KEY_ARP_OP_MASK, 1188 sizeof(key->arp.op)) || 1189 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1190 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1191 sizeof(key->arp.sha)) || 1192 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1193 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1194 sizeof(key->arp.tha)))) 1195 goto nla_put_failure; 1196 1197 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1198 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1199 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1200 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1201 sizeof(key->enc_ipv4.src)) || 1202 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1203 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1204 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1205 sizeof(key->enc_ipv4.dst)))) 1206 goto nla_put_failure; 1207 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1208 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1209 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1210 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1211 sizeof(key->enc_ipv6.src)) || 1212 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1213 TCA_FLOWER_KEY_ENC_IPV6_DST, 1214 &mask->enc_ipv6.dst, 1215 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1216 sizeof(key->enc_ipv6.dst)))) 1217 goto nla_put_failure; 1218 1219 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1220 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1221 sizeof(key->enc_key_id)) || 1222 fl_dump_key_val(skb, &key->enc_tp.src, 1223 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1224 &mask->enc_tp.src, 1225 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1226 sizeof(key->enc_tp.src)) || 1227 fl_dump_key_val(skb, &key->enc_tp.dst, 1228 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1229 &mask->enc_tp.dst, 1230 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1231 sizeof(key->enc_tp.dst))) 1232 goto nla_put_failure; 1233 1234 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1235 goto nla_put_failure; 1236 1237 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1238 goto nla_put_failure; 1239 1240 if (tcf_exts_dump(skb, &f->exts)) 1241 goto nla_put_failure; 1242 1243 nla_nest_end(skb, nest); 1244 1245 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1246 goto nla_put_failure; 1247 1248 return skb->len; 1249 1250 nla_put_failure: 1251 nla_nest_cancel(skb, nest); 1252 return -1; 1253 } 1254 1255 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1256 .kind = "flower", 1257 .classify = fl_classify, 1258 .init = fl_init, 1259 .destroy = fl_destroy, 1260 .get = fl_get, 1261 .change = fl_change, 1262 .delete = fl_delete, 1263 .walk = fl_walk, 1264 .dump = fl_dump, 1265 .owner = THIS_MODULE, 1266 }; 1267 1268 static int __init cls_fl_init(void) 1269 { 1270 return register_tcf_proto_ops(&cls_fl_ops); 1271 } 1272 1273 static void __exit cls_fl_exit(void) 1274 { 1275 unregister_tcf_proto_ops(&cls_fl_ops); 1276 } 1277 1278 module_init(cls_fl_init); 1279 module_exit(cls_fl_exit); 1280 1281 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1282 MODULE_DESCRIPTION("Flower classifier"); 1283 MODULE_LICENSE("GPL v2"); 1284