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->mkey; 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 int fl_set_key_flags(struct nlattr **tb, 446 u32 *flags_key, u32 *flags_mask) 447 { 448 u32 key, mask; 449 450 /* mask is mandatory for flags */ 451 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 452 return -EINVAL; 453 454 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 455 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 456 457 *flags_key = 0; 458 *flags_mask = 0; 459 460 fl_set_key_flag(key, mask, flags_key, flags_mask, 461 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 462 463 return 0; 464 } 465 466 static int fl_set_key(struct net *net, struct nlattr **tb, 467 struct fl_flow_key *key, struct fl_flow_key *mask) 468 { 469 __be16 ethertype; 470 int ret = 0; 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 mask->control.addr_type = ~0; 513 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 514 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 515 sizeof(key->ipv4.src)); 516 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 517 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 518 sizeof(key->ipv4.dst)); 519 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 520 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 521 mask->control.addr_type = ~0; 522 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 523 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 524 sizeof(key->ipv6.src)); 525 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 526 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 527 sizeof(key->ipv6.dst)); 528 } 529 530 if (key->basic.ip_proto == IPPROTO_TCP) { 531 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 532 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 533 sizeof(key->tp.src)); 534 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 535 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 536 sizeof(key->tp.dst)); 537 } else if (key->basic.ip_proto == IPPROTO_UDP) { 538 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 539 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 540 sizeof(key->tp.src)); 541 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 542 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 543 sizeof(key->tp.dst)); 544 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 545 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 546 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 547 sizeof(key->tp.src)); 548 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 549 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 550 sizeof(key->tp.dst)); 551 } else if (key->basic.n_proto == htons(ETH_P_IP) && 552 key->basic.ip_proto == IPPROTO_ICMP) { 553 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 554 &mask->icmp.type, 555 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 556 sizeof(key->icmp.type)); 557 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 558 &mask->icmp.code, 559 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 560 sizeof(key->icmp.code)); 561 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 562 key->basic.ip_proto == IPPROTO_ICMPV6) { 563 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 564 &mask->icmp.type, 565 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 566 sizeof(key->icmp.type)); 567 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 568 &mask->icmp.code, 569 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 570 sizeof(key->icmp.code)); 571 } 572 573 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 574 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 575 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 576 mask->enc_control.addr_type = ~0; 577 fl_set_key_val(tb, &key->enc_ipv4.src, 578 TCA_FLOWER_KEY_ENC_IPV4_SRC, 579 &mask->enc_ipv4.src, 580 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 581 sizeof(key->enc_ipv4.src)); 582 fl_set_key_val(tb, &key->enc_ipv4.dst, 583 TCA_FLOWER_KEY_ENC_IPV4_DST, 584 &mask->enc_ipv4.dst, 585 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 586 sizeof(key->enc_ipv4.dst)); 587 } 588 589 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 590 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 591 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 592 mask->enc_control.addr_type = ~0; 593 fl_set_key_val(tb, &key->enc_ipv6.src, 594 TCA_FLOWER_KEY_ENC_IPV6_SRC, 595 &mask->enc_ipv6.src, 596 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 597 sizeof(key->enc_ipv6.src)); 598 fl_set_key_val(tb, &key->enc_ipv6.dst, 599 TCA_FLOWER_KEY_ENC_IPV6_DST, 600 &mask->enc_ipv6.dst, 601 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 602 sizeof(key->enc_ipv6.dst)); 603 } 604 605 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 606 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 607 sizeof(key->enc_key_id.keyid)); 608 609 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 610 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 611 sizeof(key->enc_tp.src)); 612 613 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 614 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 615 sizeof(key->enc_tp.dst)); 616 617 if (tb[TCA_FLOWER_KEY_FLAGS]) 618 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 619 620 return ret; 621 } 622 623 static bool fl_mask_eq(struct fl_flow_mask *mask1, 624 struct fl_flow_mask *mask2) 625 { 626 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 627 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 628 629 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 630 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 631 } 632 633 static const struct rhashtable_params fl_ht_params = { 634 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 635 .head_offset = offsetof(struct cls_fl_filter, ht_node), 636 .automatic_shrinking = true, 637 }; 638 639 static int fl_init_hashtable(struct cls_fl_head *head, 640 struct fl_flow_mask *mask) 641 { 642 head->ht_params = fl_ht_params; 643 head->ht_params.key_len = fl_mask_range(mask); 644 head->ht_params.key_offset += mask->range.start; 645 646 return rhashtable_init(&head->ht, &head->ht_params); 647 } 648 649 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 650 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 651 652 #define FL_KEY_IS_MASKED(mask, member) \ 653 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 654 0, FL_KEY_MEMBER_SIZE(member)) \ 655 656 #define FL_KEY_SET(keys, cnt, id, member) \ 657 do { \ 658 keys[cnt].key_id = id; \ 659 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 660 cnt++; \ 661 } while(0); 662 663 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 664 do { \ 665 if (FL_KEY_IS_MASKED(mask, member)) \ 666 FL_KEY_SET(keys, cnt, id, member); \ 667 } while(0); 668 669 static void fl_init_dissector(struct cls_fl_head *head, 670 struct fl_flow_mask *mask) 671 { 672 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 673 size_t cnt = 0; 674 675 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 676 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 677 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 678 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 679 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 680 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 681 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 682 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 683 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 684 FLOW_DISSECTOR_KEY_PORTS, tp); 685 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 686 FLOW_DISSECTOR_KEY_ICMP, icmp); 687 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 688 FLOW_DISSECTOR_KEY_VLAN, vlan); 689 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 690 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 691 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 692 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 693 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 694 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 695 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 696 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 697 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 698 enc_control); 699 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 700 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 701 702 skb_flow_dissector_init(&head->dissector, keys, cnt); 703 } 704 705 static int fl_check_assign_mask(struct cls_fl_head *head, 706 struct fl_flow_mask *mask) 707 { 708 int err; 709 710 if (head->mask_assigned) { 711 if (!fl_mask_eq(&head->mask, mask)) 712 return -EINVAL; 713 else 714 return 0; 715 } 716 717 /* Mask is not assigned yet. So assign it and init hashtable 718 * according to that. 719 */ 720 err = fl_init_hashtable(head, mask); 721 if (err) 722 return err; 723 memcpy(&head->mask, mask, sizeof(head->mask)); 724 head->mask_assigned = true; 725 726 fl_init_dissector(head, mask); 727 728 return 0; 729 } 730 731 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 732 struct cls_fl_filter *f, struct fl_flow_mask *mask, 733 unsigned long base, struct nlattr **tb, 734 struct nlattr *est, bool ovr) 735 { 736 struct tcf_exts e; 737 int err; 738 739 err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0); 740 if (err < 0) 741 return err; 742 err = tcf_exts_validate(net, tp, tb, est, &e, ovr); 743 if (err < 0) 744 goto errout; 745 746 if (tb[TCA_FLOWER_CLASSID]) { 747 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 748 tcf_bind_filter(tp, &f->res, base); 749 } 750 751 err = fl_set_key(net, tb, &f->key, &mask->key); 752 if (err) 753 goto errout; 754 755 fl_mask_update_range(mask); 756 fl_set_masked_key(&f->mkey, &f->key, mask); 757 758 tcf_exts_change(tp, &f->exts, &e); 759 760 return 0; 761 errout: 762 tcf_exts_destroy(&e); 763 return err; 764 } 765 766 static u32 fl_grab_new_handle(struct tcf_proto *tp, 767 struct cls_fl_head *head) 768 { 769 unsigned int i = 0x80000000; 770 u32 handle; 771 772 do { 773 if (++head->hgen == 0x7FFFFFFF) 774 head->hgen = 1; 775 } while (--i > 0 && fl_get(tp, head->hgen)); 776 777 if (unlikely(i == 0)) { 778 pr_err("Insufficient number of handles\n"); 779 handle = 0; 780 } else { 781 handle = head->hgen; 782 } 783 784 return handle; 785 } 786 787 static int fl_change(struct net *net, struct sk_buff *in_skb, 788 struct tcf_proto *tp, unsigned long base, 789 u32 handle, struct nlattr **tca, 790 unsigned long *arg, bool ovr) 791 { 792 struct cls_fl_head *head = rtnl_dereference(tp->root); 793 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg; 794 struct cls_fl_filter *fnew; 795 struct nlattr *tb[TCA_FLOWER_MAX + 1]; 796 struct fl_flow_mask mask = {}; 797 int err; 798 799 if (!tca[TCA_OPTIONS]) 800 return -EINVAL; 801 802 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy); 803 if (err < 0) 804 return err; 805 806 if (fold && handle && fold->handle != handle) 807 return -EINVAL; 808 809 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 810 if (!fnew) 811 return -ENOBUFS; 812 813 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 814 if (err < 0) 815 goto errout; 816 817 if (!handle) { 818 handle = fl_grab_new_handle(tp, head); 819 if (!handle) { 820 err = -EINVAL; 821 goto errout; 822 } 823 } 824 fnew->handle = handle; 825 826 if (tb[TCA_FLOWER_FLAGS]) { 827 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 828 829 if (!tc_flags_valid(fnew->flags)) { 830 err = -EINVAL; 831 goto errout; 832 } 833 } 834 835 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 836 if (err) 837 goto errout; 838 839 err = fl_check_assign_mask(head, &mask); 840 if (err) 841 goto errout; 842 843 if (!tc_skip_sw(fnew->flags)) { 844 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 845 head->ht_params); 846 if (err) 847 goto errout; 848 } 849 850 if (!tc_skip_hw(fnew->flags)) { 851 err = fl_hw_replace_filter(tp, 852 &head->dissector, 853 &mask.key, 854 fnew); 855 if (err) 856 goto errout; 857 } 858 859 if (fold) { 860 if (!tc_skip_sw(fold->flags)) 861 rhashtable_remove_fast(&head->ht, &fold->ht_node, 862 head->ht_params); 863 if (!tc_skip_hw(fold->flags)) 864 fl_hw_destroy_filter(tp, fold); 865 } 866 867 *arg = (unsigned long) fnew; 868 869 if (fold) { 870 list_replace_rcu(&fold->list, &fnew->list); 871 tcf_unbind_filter(tp, &fold->res); 872 call_rcu(&fold->rcu, fl_destroy_filter); 873 } else { 874 list_add_tail_rcu(&fnew->list, &head->filters); 875 } 876 877 return 0; 878 879 errout: 880 tcf_exts_destroy(&fnew->exts); 881 kfree(fnew); 882 return err; 883 } 884 885 static int fl_delete(struct tcf_proto *tp, unsigned long arg) 886 { 887 struct cls_fl_head *head = rtnl_dereference(tp->root); 888 struct cls_fl_filter *f = (struct cls_fl_filter *) arg; 889 890 if (!tc_skip_sw(f->flags)) 891 rhashtable_remove_fast(&head->ht, &f->ht_node, 892 head->ht_params); 893 __fl_delete(tp, f); 894 return 0; 895 } 896 897 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 898 { 899 struct cls_fl_head *head = rtnl_dereference(tp->root); 900 struct cls_fl_filter *f; 901 902 list_for_each_entry_rcu(f, &head->filters, list) { 903 if (arg->count < arg->skip) 904 goto skip; 905 if (arg->fn(tp, (unsigned long) f, arg) < 0) { 906 arg->stop = 1; 907 break; 908 } 909 skip: 910 arg->count++; 911 } 912 } 913 914 static int fl_dump_key_val(struct sk_buff *skb, 915 void *val, int val_type, 916 void *mask, int mask_type, int len) 917 { 918 int err; 919 920 if (!memchr_inv(mask, 0, len)) 921 return 0; 922 err = nla_put(skb, val_type, len, val); 923 if (err) 924 return err; 925 if (mask_type != TCA_FLOWER_UNSPEC) { 926 err = nla_put(skb, mask_type, len, mask); 927 if (err) 928 return err; 929 } 930 return 0; 931 } 932 933 static int fl_dump_key_vlan(struct sk_buff *skb, 934 struct flow_dissector_key_vlan *vlan_key, 935 struct flow_dissector_key_vlan *vlan_mask) 936 { 937 int err; 938 939 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 940 return 0; 941 if (vlan_mask->vlan_id) { 942 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 943 vlan_key->vlan_id); 944 if (err) 945 return err; 946 } 947 if (vlan_mask->vlan_priority) { 948 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 949 vlan_key->vlan_priority); 950 if (err) 951 return err; 952 } 953 return 0; 954 } 955 956 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 957 u32 *flower_key, u32 *flower_mask, 958 u32 flower_flag_bit, u32 dissector_flag_bit) 959 { 960 if (dissector_mask & dissector_flag_bit) { 961 *flower_mask |= flower_flag_bit; 962 if (dissector_key & dissector_flag_bit) 963 *flower_key |= flower_flag_bit; 964 } 965 } 966 967 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 968 { 969 u32 key, mask; 970 __be32 _key, _mask; 971 int err; 972 973 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 974 return 0; 975 976 key = 0; 977 mask = 0; 978 979 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 980 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 981 982 _key = cpu_to_be32(key); 983 _mask = cpu_to_be32(mask); 984 985 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 986 if (err) 987 return err; 988 989 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 990 } 991 992 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, 993 struct sk_buff *skb, struct tcmsg *t) 994 { 995 struct cls_fl_head *head = rtnl_dereference(tp->root); 996 struct cls_fl_filter *f = (struct cls_fl_filter *) fh; 997 struct nlattr *nest; 998 struct fl_flow_key *key, *mask; 999 1000 if (!f) 1001 return skb->len; 1002 1003 t->tcm_handle = f->handle; 1004 1005 nest = nla_nest_start(skb, TCA_OPTIONS); 1006 if (!nest) 1007 goto nla_put_failure; 1008 1009 if (f->res.classid && 1010 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1011 goto nla_put_failure; 1012 1013 key = &f->key; 1014 mask = &head->mask.key; 1015 1016 if (mask->indev_ifindex) { 1017 struct net_device *dev; 1018 1019 dev = __dev_get_by_index(net, key->indev_ifindex); 1020 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1021 goto nla_put_failure; 1022 } 1023 1024 if (!tc_skip_hw(f->flags)) 1025 fl_hw_update_stats(tp, f); 1026 1027 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1028 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1029 sizeof(key->eth.dst)) || 1030 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1031 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1032 sizeof(key->eth.src)) || 1033 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1034 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1035 sizeof(key->basic.n_proto))) 1036 goto nla_put_failure; 1037 1038 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1039 goto nla_put_failure; 1040 1041 if ((key->basic.n_proto == htons(ETH_P_IP) || 1042 key->basic.n_proto == htons(ETH_P_IPV6)) && 1043 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1044 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1045 sizeof(key->basic.ip_proto))) 1046 goto nla_put_failure; 1047 1048 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1049 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1050 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1051 sizeof(key->ipv4.src)) || 1052 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1053 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1054 sizeof(key->ipv4.dst)))) 1055 goto nla_put_failure; 1056 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1057 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1058 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1059 sizeof(key->ipv6.src)) || 1060 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1061 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1062 sizeof(key->ipv6.dst)))) 1063 goto nla_put_failure; 1064 1065 if (key->basic.ip_proto == IPPROTO_TCP && 1066 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1067 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1068 sizeof(key->tp.src)) || 1069 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1070 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1071 sizeof(key->tp.dst)))) 1072 goto nla_put_failure; 1073 else if (key->basic.ip_proto == IPPROTO_UDP && 1074 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1075 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1076 sizeof(key->tp.src)) || 1077 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1078 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1079 sizeof(key->tp.dst)))) 1080 goto nla_put_failure; 1081 else if (key->basic.ip_proto == IPPROTO_SCTP && 1082 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1083 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1084 sizeof(key->tp.src)) || 1085 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1086 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1087 sizeof(key->tp.dst)))) 1088 goto nla_put_failure; 1089 else if (key->basic.n_proto == htons(ETH_P_IP) && 1090 key->basic.ip_proto == IPPROTO_ICMP && 1091 (fl_dump_key_val(skb, &key->icmp.type, 1092 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1093 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1094 sizeof(key->icmp.type)) || 1095 fl_dump_key_val(skb, &key->icmp.code, 1096 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1097 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1098 sizeof(key->icmp.code)))) 1099 goto nla_put_failure; 1100 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1101 key->basic.ip_proto == IPPROTO_ICMPV6 && 1102 (fl_dump_key_val(skb, &key->icmp.type, 1103 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1104 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1105 sizeof(key->icmp.type)) || 1106 fl_dump_key_val(skb, &key->icmp.code, 1107 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1108 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1109 sizeof(key->icmp.code)))) 1110 goto nla_put_failure; 1111 1112 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1113 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1114 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1115 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1116 sizeof(key->enc_ipv4.src)) || 1117 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1118 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1119 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1120 sizeof(key->enc_ipv4.dst)))) 1121 goto nla_put_failure; 1122 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1123 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1124 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1125 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1126 sizeof(key->enc_ipv6.src)) || 1127 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1128 TCA_FLOWER_KEY_ENC_IPV6_DST, 1129 &mask->enc_ipv6.dst, 1130 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1131 sizeof(key->enc_ipv6.dst)))) 1132 goto nla_put_failure; 1133 1134 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1135 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1136 sizeof(key->enc_key_id)) || 1137 fl_dump_key_val(skb, &key->enc_tp.src, 1138 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1139 &mask->enc_tp.src, 1140 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1141 sizeof(key->enc_tp.src)) || 1142 fl_dump_key_val(skb, &key->enc_tp.dst, 1143 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1144 &mask->enc_tp.dst, 1145 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1146 sizeof(key->enc_tp.dst))) 1147 goto nla_put_failure; 1148 1149 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1150 goto nla_put_failure; 1151 1152 nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags); 1153 1154 if (tcf_exts_dump(skb, &f->exts)) 1155 goto nla_put_failure; 1156 1157 nla_nest_end(skb, nest); 1158 1159 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1160 goto nla_put_failure; 1161 1162 return skb->len; 1163 1164 nla_put_failure: 1165 nla_nest_cancel(skb, nest); 1166 return -1; 1167 } 1168 1169 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1170 .kind = "flower", 1171 .classify = fl_classify, 1172 .init = fl_init, 1173 .destroy = fl_destroy, 1174 .get = fl_get, 1175 .change = fl_change, 1176 .delete = fl_delete, 1177 .walk = fl_walk, 1178 .dump = fl_dump, 1179 .owner = THIS_MODULE, 1180 }; 1181 1182 static int __init cls_fl_init(void) 1183 { 1184 return register_tcf_proto_ops(&cls_fl_ops); 1185 } 1186 1187 static void __exit cls_fl_exit(void) 1188 { 1189 unregister_tcf_proto_ops(&cls_fl_ops); 1190 } 1191 1192 module_init(cls_fl_init); 1193 module_exit(cls_fl_exit); 1194 1195 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1196 MODULE_DESCRIPTION("Flower classifier"); 1197 MODULE_LICENSE("GPL v2"); 1198