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_keyid enc_key_id; 44 union { 45 struct flow_dissector_key_ipv4_addrs enc_ipv4; 46 struct flow_dissector_key_ipv6_addrs enc_ipv6; 47 }; 48 struct flow_dissector_key_ports enc_tp; 49 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 50 51 struct fl_flow_mask_range { 52 unsigned short int start; 53 unsigned short int end; 54 }; 55 56 struct fl_flow_mask { 57 struct fl_flow_key key; 58 struct fl_flow_mask_range range; 59 struct rcu_head rcu; 60 }; 61 62 struct cls_fl_head { 63 struct rhashtable ht; 64 struct fl_flow_mask mask; 65 struct flow_dissector dissector; 66 u32 hgen; 67 bool mask_assigned; 68 struct list_head filters; 69 struct rhashtable_params ht_params; 70 union { 71 struct work_struct work; 72 struct rcu_head rcu; 73 }; 74 }; 75 76 struct cls_fl_filter { 77 struct rhash_head ht_node; 78 struct fl_flow_key mkey; 79 struct tcf_exts exts; 80 struct tcf_result res; 81 struct fl_flow_key key; 82 struct list_head list; 83 u32 handle; 84 u32 flags; 85 struct rcu_head rcu; 86 struct tc_to_netdev tc; 87 struct net_device *hw_dev; 88 }; 89 90 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 91 { 92 return mask->range.end - mask->range.start; 93 } 94 95 static void fl_mask_update_range(struct fl_flow_mask *mask) 96 { 97 const u8 *bytes = (const u8 *) &mask->key; 98 size_t size = sizeof(mask->key); 99 size_t i, first = 0, last = size - 1; 100 101 for (i = 0; i < sizeof(mask->key); i++) { 102 if (bytes[i]) { 103 if (!first && i) 104 first = i; 105 last = i; 106 } 107 } 108 mask->range.start = rounddown(first, sizeof(long)); 109 mask->range.end = roundup(last + 1, sizeof(long)); 110 } 111 112 static void *fl_key_get_start(struct fl_flow_key *key, 113 const struct fl_flow_mask *mask) 114 { 115 return (u8 *) key + mask->range.start; 116 } 117 118 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 119 struct fl_flow_mask *mask) 120 { 121 const long *lkey = fl_key_get_start(key, mask); 122 const long *lmask = fl_key_get_start(&mask->key, mask); 123 long *lmkey = fl_key_get_start(mkey, mask); 124 int i; 125 126 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 127 *lmkey++ = *lkey++ & *lmask++; 128 } 129 130 static void fl_clear_masked_range(struct fl_flow_key *key, 131 struct fl_flow_mask *mask) 132 { 133 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 134 } 135 136 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 137 struct tcf_result *res) 138 { 139 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 140 struct cls_fl_filter *f; 141 struct fl_flow_key skb_key; 142 struct fl_flow_key skb_mkey; 143 struct ip_tunnel_info *info; 144 145 if (!atomic_read(&head->ht.nelems)) 146 return -1; 147 148 fl_clear_masked_range(&skb_key, &head->mask); 149 150 info = skb_tunnel_info(skb); 151 if (info) { 152 struct ip_tunnel_key *key = &info->key; 153 154 switch (ip_tunnel_info_af(info)) { 155 case AF_INET: 156 skb_key.enc_ipv4.src = key->u.ipv4.src; 157 skb_key.enc_ipv4.dst = key->u.ipv4.dst; 158 break; 159 case AF_INET6: 160 skb_key.enc_ipv6.src = key->u.ipv6.src; 161 skb_key.enc_ipv6.dst = key->u.ipv6.dst; 162 break; 163 } 164 165 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id); 166 skb_key.enc_tp.src = key->tp_src; 167 skb_key.enc_tp.dst = key->tp_dst; 168 } 169 170 skb_key.indev_ifindex = skb->skb_iif; 171 /* skb_flow_dissect() does not set n_proto in case an unknown protocol, 172 * so do it rather here. 173 */ 174 skb_key.basic.n_proto = skb->protocol; 175 skb_flow_dissect(skb, &head->dissector, &skb_key, 0); 176 177 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); 178 179 f = rhashtable_lookup_fast(&head->ht, 180 fl_key_get_start(&skb_mkey, &head->mask), 181 head->ht_params); 182 if (f && !tc_skip_sw(f->flags)) { 183 *res = f->res; 184 return tcf_exts_exec(skb, &f->exts, res); 185 } 186 return -1; 187 } 188 189 static int fl_init(struct tcf_proto *tp) 190 { 191 struct cls_fl_head *head; 192 193 head = kzalloc(sizeof(*head), GFP_KERNEL); 194 if (!head) 195 return -ENOBUFS; 196 197 INIT_LIST_HEAD_RCU(&head->filters); 198 rcu_assign_pointer(tp->root, head); 199 200 return 0; 201 } 202 203 static void fl_destroy_filter(struct rcu_head *head) 204 { 205 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); 206 207 tcf_exts_destroy(&f->exts); 208 kfree(f); 209 } 210 211 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) 212 { 213 struct tc_cls_flower_offload offload = {0}; 214 struct net_device *dev = f->hw_dev; 215 struct tc_to_netdev *tc = &f->tc; 216 217 if (!tc_can_offload(dev, tp)) 218 return; 219 220 offload.command = TC_CLSFLOWER_DESTROY; 221 offload.cookie = (unsigned long)f; 222 223 tc->type = TC_SETUP_CLSFLOWER; 224 tc->cls_flower = &offload; 225 226 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); 227 } 228 229 static int fl_hw_replace_filter(struct tcf_proto *tp, 230 struct flow_dissector *dissector, 231 struct fl_flow_key *mask, 232 struct cls_fl_filter *f) 233 { 234 struct net_device *dev = tp->q->dev_queue->dev; 235 struct tc_cls_flower_offload offload = {0}; 236 struct tc_to_netdev *tc = &f->tc; 237 int err; 238 239 if (!tc_can_offload(dev, tp)) { 240 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) || 241 (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) { 242 f->hw_dev = dev; 243 return tc_skip_sw(f->flags) ? -EINVAL : 0; 244 } 245 dev = f->hw_dev; 246 tc->egress_dev = true; 247 } else { 248 f->hw_dev = dev; 249 } 250 251 offload.command = TC_CLSFLOWER_REPLACE; 252 offload.cookie = (unsigned long)f; 253 offload.dissector = dissector; 254 offload.mask = mask; 255 offload.key = &f->key; 256 offload.exts = &f->exts; 257 258 tc->type = TC_SETUP_CLSFLOWER; 259 tc->cls_flower = &offload; 260 261 err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, 262 tc); 263 264 if (tc_skip_sw(f->flags)) 265 return err; 266 return 0; 267 } 268 269 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 270 { 271 struct tc_cls_flower_offload offload = {0}; 272 struct net_device *dev = f->hw_dev; 273 struct tc_to_netdev *tc = &f->tc; 274 275 if (!tc_can_offload(dev, tp)) 276 return; 277 278 offload.command = TC_CLSFLOWER_STATS; 279 offload.cookie = (unsigned long)f; 280 offload.exts = &f->exts; 281 282 tc->type = TC_SETUP_CLSFLOWER; 283 tc->cls_flower = &offload; 284 285 dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc); 286 } 287 288 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) 289 { 290 list_del_rcu(&f->list); 291 if (!tc_skip_hw(f->flags)) 292 fl_hw_destroy_filter(tp, f); 293 tcf_unbind_filter(tp, &f->res); 294 call_rcu(&f->rcu, fl_destroy_filter); 295 } 296 297 static void fl_destroy_sleepable(struct work_struct *work) 298 { 299 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 300 work); 301 if (head->mask_assigned) 302 rhashtable_destroy(&head->ht); 303 kfree(head); 304 module_put(THIS_MODULE); 305 } 306 307 static void fl_destroy_rcu(struct rcu_head *rcu) 308 { 309 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 310 311 INIT_WORK(&head->work, fl_destroy_sleepable); 312 schedule_work(&head->work); 313 } 314 315 static bool fl_destroy(struct tcf_proto *tp, bool force) 316 { 317 struct cls_fl_head *head = rtnl_dereference(tp->root); 318 struct cls_fl_filter *f, *next; 319 320 if (!force && !list_empty(&head->filters)) 321 return false; 322 323 list_for_each_entry_safe(f, next, &head->filters, list) 324 __fl_delete(tp, f); 325 326 __module_get(THIS_MODULE); 327 call_rcu(&head->rcu, fl_destroy_rcu); 328 329 return true; 330 } 331 332 static unsigned long fl_get(struct tcf_proto *tp, u32 handle) 333 { 334 struct cls_fl_head *head = rtnl_dereference(tp->root); 335 struct cls_fl_filter *f; 336 337 list_for_each_entry(f, &head->filters, list) 338 if (f->handle == handle) 339 return (unsigned long) f; 340 return 0; 341 } 342 343 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 344 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 345 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 346 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 347 .len = IFNAMSIZ }, 348 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 349 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 350 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 351 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 352 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 353 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 354 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 355 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 356 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 357 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 358 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 359 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 360 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 361 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 362 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 363 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 364 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 365 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 366 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 367 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 368 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 369 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 370 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 371 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 372 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 373 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 374 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 375 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 376 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 377 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 378 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 379 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 380 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 381 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 382 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 383 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 384 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 385 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 386 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 387 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 388 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 389 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 390 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 391 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 392 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 393 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 394 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 395 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 396 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 397 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 398 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 399 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 400 }; 401 402 static void fl_set_key_val(struct nlattr **tb, 403 void *val, int val_type, 404 void *mask, int mask_type, int len) 405 { 406 if (!tb[val_type]) 407 return; 408 memcpy(val, nla_data(tb[val_type]), len); 409 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 410 memset(mask, 0xff, len); 411 else 412 memcpy(mask, nla_data(tb[mask_type]), len); 413 } 414 415 static void fl_set_key_vlan(struct nlattr **tb, 416 struct flow_dissector_key_vlan *key_val, 417 struct flow_dissector_key_vlan *key_mask) 418 { 419 #define VLAN_PRIORITY_MASK 0x7 420 421 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 422 key_val->vlan_id = 423 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 424 key_mask->vlan_id = VLAN_VID_MASK; 425 } 426 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 427 key_val->vlan_priority = 428 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 429 VLAN_PRIORITY_MASK; 430 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 431 } 432 } 433 434 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 435 u32 *dissector_key, u32 *dissector_mask, 436 u32 flower_flag_bit, u32 dissector_flag_bit) 437 { 438 if (flower_mask & flower_flag_bit) { 439 *dissector_mask |= dissector_flag_bit; 440 if (flower_key & flower_flag_bit) 441 *dissector_key |= dissector_flag_bit; 442 } 443 } 444 445 static void fl_set_key_flags(struct nlattr **tb, 446 u32 *flags_key, u32 *flags_mask) 447 { 448 u32 key, mask; 449 450 if (!tb[TCA_FLOWER_KEY_FLAGS]) 451 return; 452 453 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 454 455 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 456 mask = ~0; 457 else 458 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 459 460 *flags_key = 0; 461 *flags_mask = 0; 462 463 fl_set_key_flag(key, mask, flags_key, flags_mask, 464 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 465 } 466 467 static int fl_set_key(struct net *net, struct nlattr **tb, 468 struct fl_flow_key *key, struct fl_flow_key *mask) 469 { 470 __be16 ethertype; 471 #ifdef CONFIG_NET_CLS_IND 472 if (tb[TCA_FLOWER_INDEV]) { 473 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); 474 if (err < 0) 475 return err; 476 key->indev_ifindex = err; 477 mask->indev_ifindex = 0xffffffff; 478 } 479 #endif 480 481 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 482 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 483 sizeof(key->eth.dst)); 484 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 485 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 486 sizeof(key->eth.src)); 487 488 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 489 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 490 491 if (ethertype == htons(ETH_P_8021Q)) { 492 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 493 fl_set_key_val(tb, &key->basic.n_proto, 494 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 495 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 496 sizeof(key->basic.n_proto)); 497 } else { 498 key->basic.n_proto = ethertype; 499 mask->basic.n_proto = cpu_to_be16(~0); 500 } 501 } 502 503 if (key->basic.n_proto == htons(ETH_P_IP) || 504 key->basic.n_proto == htons(ETH_P_IPV6)) { 505 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 506 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 507 sizeof(key->basic.ip_proto)); 508 } 509 510 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 511 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 512 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 513 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 514 sizeof(key->ipv4.src)); 515 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 516 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 517 sizeof(key->ipv4.dst)); 518 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 519 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 520 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 521 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 522 sizeof(key->ipv6.src)); 523 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 524 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 525 sizeof(key->ipv6.dst)); 526 } 527 528 if (key->basic.ip_proto == IPPROTO_TCP) { 529 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 530 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 531 sizeof(key->tp.src)); 532 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 533 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 534 sizeof(key->tp.dst)); 535 } else if (key->basic.ip_proto == IPPROTO_UDP) { 536 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 537 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 538 sizeof(key->tp.src)); 539 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 540 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 541 sizeof(key->tp.dst)); 542 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 543 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 544 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 545 sizeof(key->tp.src)); 546 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 547 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 548 sizeof(key->tp.dst)); 549 } else if (key->basic.n_proto == htons(ETH_P_IP) && 550 key->basic.ip_proto == IPPROTO_ICMP) { 551 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 552 &mask->icmp.type, 553 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 554 sizeof(key->icmp.type)); 555 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 556 &mask->icmp.code, 557 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 558 sizeof(key->icmp.code)); 559 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 560 key->basic.ip_proto == IPPROTO_ICMPV6) { 561 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 562 &mask->icmp.type, 563 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 564 sizeof(key->icmp.type)); 565 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 566 &mask->icmp.code, 567 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 568 sizeof(key->icmp.code)); 569 } 570 571 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 572 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 573 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 574 fl_set_key_val(tb, &key->enc_ipv4.src, 575 TCA_FLOWER_KEY_ENC_IPV4_SRC, 576 &mask->enc_ipv4.src, 577 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 578 sizeof(key->enc_ipv4.src)); 579 fl_set_key_val(tb, &key->enc_ipv4.dst, 580 TCA_FLOWER_KEY_ENC_IPV4_DST, 581 &mask->enc_ipv4.dst, 582 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 583 sizeof(key->enc_ipv4.dst)); 584 } 585 586 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 587 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 588 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 589 fl_set_key_val(tb, &key->enc_ipv6.src, 590 TCA_FLOWER_KEY_ENC_IPV6_SRC, 591 &mask->enc_ipv6.src, 592 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 593 sizeof(key->enc_ipv6.src)); 594 fl_set_key_val(tb, &key->enc_ipv6.dst, 595 TCA_FLOWER_KEY_ENC_IPV6_DST, 596 &mask->enc_ipv6.dst, 597 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 598 sizeof(key->enc_ipv6.dst)); 599 } 600 601 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 602 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 603 sizeof(key->enc_key_id.keyid)); 604 605 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 606 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 607 sizeof(key->enc_tp.src)); 608 609 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 610 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 611 sizeof(key->enc_tp.dst)); 612 613 fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 614 615 return 0; 616 } 617 618 static bool fl_mask_eq(struct fl_flow_mask *mask1, 619 struct fl_flow_mask *mask2) 620 { 621 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 622 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 623 624 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 625 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 626 } 627 628 static const struct rhashtable_params fl_ht_params = { 629 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 630 .head_offset = offsetof(struct cls_fl_filter, ht_node), 631 .automatic_shrinking = true, 632 }; 633 634 static int fl_init_hashtable(struct cls_fl_head *head, 635 struct fl_flow_mask *mask) 636 { 637 head->ht_params = fl_ht_params; 638 head->ht_params.key_len = fl_mask_range(mask); 639 head->ht_params.key_offset += mask->range.start; 640 641 return rhashtable_init(&head->ht, &head->ht_params); 642 } 643 644 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 645 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 646 647 #define FL_KEY_IS_MASKED(mask, member) \ 648 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 649 0, FL_KEY_MEMBER_SIZE(member)) \ 650 651 #define FL_KEY_SET(keys, cnt, id, member) \ 652 do { \ 653 keys[cnt].key_id = id; \ 654 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 655 cnt++; \ 656 } while(0); 657 658 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 659 do { \ 660 if (FL_KEY_IS_MASKED(mask, member)) \ 661 FL_KEY_SET(keys, cnt, id, member); \ 662 } while(0); 663 664 static void fl_init_dissector(struct cls_fl_head *head, 665 struct fl_flow_mask *mask) 666 { 667 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 668 size_t cnt = 0; 669 670 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 671 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 672 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 673 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 674 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 675 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 676 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 677 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 678 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 679 FLOW_DISSECTOR_KEY_PORTS, tp); 680 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 681 FLOW_DISSECTOR_KEY_ICMP, icmp); 682 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 683 FLOW_DISSECTOR_KEY_VLAN, vlan); 684 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 685 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 686 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 687 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 688 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 689 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 690 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 691 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 692 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 693 enc_control); 694 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 695 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 696 697 skb_flow_dissector_init(&head->dissector, keys, cnt); 698 } 699 700 static int fl_check_assign_mask(struct cls_fl_head *head, 701 struct fl_flow_mask *mask) 702 { 703 int err; 704 705 if (head->mask_assigned) { 706 if (!fl_mask_eq(&head->mask, mask)) 707 return -EINVAL; 708 else 709 return 0; 710 } 711 712 /* Mask is not assigned yet. So assign it and init hashtable 713 * according to that. 714 */ 715 err = fl_init_hashtable(head, mask); 716 if (err) 717 return err; 718 memcpy(&head->mask, mask, sizeof(head->mask)); 719 head->mask_assigned = true; 720 721 fl_init_dissector(head, mask); 722 723 return 0; 724 } 725 726 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 727 struct cls_fl_filter *f, struct fl_flow_mask *mask, 728 unsigned long base, struct nlattr **tb, 729 struct nlattr *est, bool ovr) 730 { 731 struct tcf_exts e; 732 int err; 733 734 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); 735 if (err < 0) 736 return err; 737 err = tcf_exts_validate(net, tp, tb, est, &e, ovr); 738 if (err < 0) 739 goto errout; 740 741 if (tb[TCA_FLOWER_CLASSID]) { 742 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 743 tcf_bind_filter(tp, &f->res, base); 744 } 745 746 err = fl_set_key(net, tb, &f->key, &mask->key); 747 if (err) 748 goto errout; 749 750 fl_mask_update_range(mask); 751 fl_set_masked_key(&f->mkey, &f->key, mask); 752 753 tcf_exts_change(tp, &f->exts, &e); 754 755 return 0; 756 errout: 757 tcf_exts_destroy(&e); 758 return err; 759 } 760 761 static u32 fl_grab_new_handle(struct tcf_proto *tp, 762 struct cls_fl_head *head) 763 { 764 unsigned int i = 0x80000000; 765 u32 handle; 766 767 do { 768 if (++head->hgen == 0x7FFFFFFF) 769 head->hgen = 1; 770 } while (--i > 0 && fl_get(tp, head->hgen)); 771 772 if (unlikely(i == 0)) { 773 pr_err("Insufficient number of handles\n"); 774 handle = 0; 775 } else { 776 handle = head->hgen; 777 } 778 779 return handle; 780 } 781 782 static int fl_change(struct net *net, struct sk_buff *in_skb, 783 struct tcf_proto *tp, unsigned long base, 784 u32 handle, struct nlattr **tca, 785 unsigned long *arg, bool ovr) 786 { 787 struct cls_fl_head *head = rtnl_dereference(tp->root); 788 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; 789 struct cls_fl_filter *fnew; 790 struct nlattr *tb[TCA_FLOWER_MAX + 1]; 791 struct fl_flow_mask mask = {}; 792 int err; 793 794 if (!tca[TCA_OPTIONS]) 795 return -EINVAL; 796 797 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy); 798 if (err < 0) 799 return err; 800 801 if (fold && handle && fold->handle != handle) 802 return -EINVAL; 803 804 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 805 if (!fnew) 806 return -ENOBUFS; 807 808 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 809 if (err < 0) 810 goto errout; 811 812 if (!handle) { 813 handle = fl_grab_new_handle(tp, head); 814 if (!handle) { 815 err = -EINVAL; 816 goto errout; 817 } 818 } 819 fnew->handle = handle; 820 821 if (tb[TCA_FLOWER_FLAGS]) { 822 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 823 824 if (!tc_flags_valid(fnew->flags)) { 825 err = -EINVAL; 826 goto errout; 827 } 828 } 829 830 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 831 if (err) 832 goto errout; 833 834 err = fl_check_assign_mask(head, &mask); 835 if (err) 836 goto errout; 837 838 if (!tc_skip_sw(fnew->flags)) { 839 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 840 head->ht_params); 841 if (err) 842 goto errout; 843 } 844 845 if (!tc_skip_hw(fnew->flags)) { 846 err = fl_hw_replace_filter(tp, 847 &head->dissector, 848 &mask.key, 849 fnew); 850 if (err) 851 goto errout; 852 } 853 854 if (fold) { 855 if (!tc_skip_sw(fold->flags)) 856 rhashtable_remove_fast(&head->ht, &fold->ht_node, 857 head->ht_params); 858 if (!tc_skip_hw(fold->flags)) 859 fl_hw_destroy_filter(tp, fold); 860 } 861 862 *arg = (unsigned long) fnew; 863 864 if (fold) { 865 list_replace_rcu(&fold->list, &fnew->list); 866 tcf_unbind_filter(tp, &fold->res); 867 call_rcu(&fold->rcu, fl_destroy_filter); 868 } else { 869 list_add_tail_rcu(&fnew->list, &head->filters); 870 } 871 872 return 0; 873 874 errout: 875 tcf_exts_destroy(&fnew->exts); 876 kfree(fnew); 877 return err; 878 } 879 880 static int fl_delete(struct tcf_proto *tp, unsigned long arg) 881 { 882 struct cls_fl_head *head = rtnl_dereference(tp->root); 883 struct cls_fl_filter *f = (struct cls_fl_filter *) arg; 884 885 if (!tc_skip_sw(f->flags)) 886 rhashtable_remove_fast(&head->ht, &f->ht_node, 887 head->ht_params); 888 __fl_delete(tp, f); 889 return 0; 890 } 891 892 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 893 { 894 struct cls_fl_head *head = rtnl_dereference(tp->root); 895 struct cls_fl_filter *f; 896 897 list_for_each_entry_rcu(f, &head->filters, list) { 898 if (arg->count < arg->skip) 899 goto skip; 900 if (arg->fn(tp, (unsigned long) f, arg) < 0) { 901 arg->stop = 1; 902 break; 903 } 904 skip: 905 arg->count++; 906 } 907 } 908 909 static int fl_dump_key_val(struct sk_buff *skb, 910 void *val, int val_type, 911 void *mask, int mask_type, int len) 912 { 913 int err; 914 915 if (!memchr_inv(mask, 0, len)) 916 return 0; 917 err = nla_put(skb, val_type, len, val); 918 if (err) 919 return err; 920 if (mask_type != TCA_FLOWER_UNSPEC) { 921 err = nla_put(skb, mask_type, len, mask); 922 if (err) 923 return err; 924 } 925 return 0; 926 } 927 928 static int fl_dump_key_vlan(struct sk_buff *skb, 929 struct flow_dissector_key_vlan *vlan_key, 930 struct flow_dissector_key_vlan *vlan_mask) 931 { 932 int err; 933 934 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 935 return 0; 936 if (vlan_mask->vlan_id) { 937 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 938 vlan_key->vlan_id); 939 if (err) 940 return err; 941 } 942 if (vlan_mask->vlan_priority) { 943 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 944 vlan_key->vlan_priority); 945 if (err) 946 return err; 947 } 948 return 0; 949 } 950 951 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 952 u32 *flower_key, u32 *flower_mask, 953 u32 flower_flag_bit, u32 dissector_flag_bit) 954 { 955 if (dissector_mask & dissector_flag_bit) { 956 *flower_mask |= flower_flag_bit; 957 if (dissector_key & dissector_flag_bit) 958 *flower_key |= flower_flag_bit; 959 } 960 } 961 962 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 963 { 964 u32 key, mask; 965 __be32 _key, _mask; 966 int err; 967 968 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 969 return 0; 970 971 key = 0; 972 mask = 0; 973 974 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 975 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 976 977 _key = cpu_to_be32(key); 978 _mask = cpu_to_be32(mask); 979 980 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 981 if (err) 982 return err; 983 984 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 985 } 986 987 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, 988 struct sk_buff *skb, struct tcmsg *t) 989 { 990 struct cls_fl_head *head = rtnl_dereference(tp->root); 991 struct cls_fl_filter *f = (struct cls_fl_filter *) fh; 992 struct nlattr *nest; 993 struct fl_flow_key *key, *mask; 994 995 if (!f) 996 return skb->len; 997 998 t->tcm_handle = f->handle; 999 1000 nest = nla_nest_start(skb, TCA_OPTIONS); 1001 if (!nest) 1002 goto nla_put_failure; 1003 1004 if (f->res.classid && 1005 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1006 goto nla_put_failure; 1007 1008 key = &f->key; 1009 mask = &head->mask.key; 1010 1011 if (mask->indev_ifindex) { 1012 struct net_device *dev; 1013 1014 dev = __dev_get_by_index(net, key->indev_ifindex); 1015 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1016 goto nla_put_failure; 1017 } 1018 1019 if (!tc_skip_hw(f->flags)) 1020 fl_hw_update_stats(tp, f); 1021 1022 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1023 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1024 sizeof(key->eth.dst)) || 1025 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1026 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1027 sizeof(key->eth.src)) || 1028 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1029 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1030 sizeof(key->basic.n_proto))) 1031 goto nla_put_failure; 1032 1033 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1034 goto nla_put_failure; 1035 1036 if ((key->basic.n_proto == htons(ETH_P_IP) || 1037 key->basic.n_proto == htons(ETH_P_IPV6)) && 1038 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1039 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1040 sizeof(key->basic.ip_proto))) 1041 goto nla_put_failure; 1042 1043 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1044 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1045 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1046 sizeof(key->ipv4.src)) || 1047 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1048 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1049 sizeof(key->ipv4.dst)))) 1050 goto nla_put_failure; 1051 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1052 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1053 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1054 sizeof(key->ipv6.src)) || 1055 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1056 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1057 sizeof(key->ipv6.dst)))) 1058 goto nla_put_failure; 1059 1060 if (key->basic.ip_proto == IPPROTO_TCP && 1061 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1062 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1063 sizeof(key->tp.src)) || 1064 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1065 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1066 sizeof(key->tp.dst)))) 1067 goto nla_put_failure; 1068 else if (key->basic.ip_proto == IPPROTO_UDP && 1069 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1070 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1071 sizeof(key->tp.src)) || 1072 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1073 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1074 sizeof(key->tp.dst)))) 1075 goto nla_put_failure; 1076 else if (key->basic.ip_proto == IPPROTO_SCTP && 1077 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1078 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1079 sizeof(key->tp.src)) || 1080 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1081 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1082 sizeof(key->tp.dst)))) 1083 goto nla_put_failure; 1084 else if (key->basic.n_proto == htons(ETH_P_IP) && 1085 key->basic.ip_proto == IPPROTO_ICMP && 1086 (fl_dump_key_val(skb, &key->icmp.type, 1087 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1088 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1089 sizeof(key->icmp.type)) || 1090 fl_dump_key_val(skb, &key->icmp.code, 1091 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1092 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1093 sizeof(key->icmp.code)))) 1094 goto nla_put_failure; 1095 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1096 key->basic.ip_proto == IPPROTO_ICMPV6 && 1097 (fl_dump_key_val(skb, &key->icmp.type, 1098 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1099 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1100 sizeof(key->icmp.type)) || 1101 fl_dump_key_val(skb, &key->icmp.code, 1102 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1103 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1104 sizeof(key->icmp.code)))) 1105 goto nla_put_failure; 1106 1107 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1108 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1109 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1110 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1111 sizeof(key->enc_ipv4.src)) || 1112 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1113 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1114 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1115 sizeof(key->enc_ipv4.dst)))) 1116 goto nla_put_failure; 1117 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1118 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1119 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1120 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1121 sizeof(key->enc_ipv6.src)) || 1122 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1123 TCA_FLOWER_KEY_ENC_IPV6_DST, 1124 &mask->enc_ipv6.dst, 1125 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1126 sizeof(key->enc_ipv6.dst)))) 1127 goto nla_put_failure; 1128 1129 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1130 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1131 sizeof(key->enc_key_id)) || 1132 fl_dump_key_val(skb, &key->enc_tp.src, 1133 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1134 &mask->enc_tp.src, 1135 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1136 sizeof(key->enc_tp.src)) || 1137 fl_dump_key_val(skb, &key->enc_tp.dst, 1138 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1139 &mask->enc_tp.dst, 1140 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1141 sizeof(key->enc_tp.dst))) 1142 goto nla_put_failure; 1143 1144 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1145 goto nla_put_failure; 1146 1147 nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags); 1148 1149 if (tcf_exts_dump(skb, &f->exts)) 1150 goto nla_put_failure; 1151 1152 nla_nest_end(skb, nest); 1153 1154 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1155 goto nla_put_failure; 1156 1157 return skb->len; 1158 1159 nla_put_failure: 1160 nla_nest_cancel(skb, nest); 1161 return -1; 1162 } 1163 1164 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1165 .kind = "flower", 1166 .classify = fl_classify, 1167 .init = fl_init, 1168 .destroy = fl_destroy, 1169 .get = fl_get, 1170 .change = fl_change, 1171 .delete = fl_delete, 1172 .walk = fl_walk, 1173 .dump = fl_dump, 1174 .owner = THIS_MODULE, 1175 }; 1176 1177 static int __init cls_fl_init(void) 1178 { 1179 return register_tcf_proto_ops(&cls_fl_ops); 1180 } 1181 1182 static void __exit cls_fl_exit(void) 1183 { 1184 unregister_tcf_proto_ops(&cls_fl_ops); 1185 } 1186 1187 module_init(cls_fl_init); 1188 module_exit(cls_fl_exit); 1189 1190 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1191 MODULE_DESCRIPTION("Flower classifier"); 1192 MODULE_LICENSE("GPL v2"); 1193