1 /* 2 * net/sched/cls_flower.c Flower classifier 3 * 4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/rhashtable.h> 16 #include <linux/workqueue.h> 17 18 #include <linux/if_ether.h> 19 #include <linux/in6.h> 20 #include <linux/ip.h> 21 #include <linux/mpls.h> 22 23 #include <net/sch_generic.h> 24 #include <net/pkt_cls.h> 25 #include <net/ip.h> 26 #include <net/flow_dissector.h> 27 28 #include <net/dst.h> 29 #include <net/dst_metadata.h> 30 31 struct fl_flow_key { 32 int indev_ifindex; 33 struct flow_dissector_key_control control; 34 struct flow_dissector_key_control enc_control; 35 struct flow_dissector_key_basic basic; 36 struct flow_dissector_key_eth_addrs eth; 37 struct flow_dissector_key_vlan vlan; 38 union { 39 struct flow_dissector_key_ipv4_addrs ipv4; 40 struct flow_dissector_key_ipv6_addrs ipv6; 41 }; 42 struct flow_dissector_key_ports tp; 43 struct flow_dissector_key_icmp icmp; 44 struct flow_dissector_key_arp arp; 45 struct flow_dissector_key_keyid enc_key_id; 46 union { 47 struct flow_dissector_key_ipv4_addrs enc_ipv4; 48 struct flow_dissector_key_ipv6_addrs enc_ipv6; 49 }; 50 struct flow_dissector_key_ports enc_tp; 51 struct flow_dissector_key_mpls mpls; 52 struct flow_dissector_key_tcp tcp; 53 struct flow_dissector_key_ip ip; 54 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 55 56 struct fl_flow_mask_range { 57 unsigned short int start; 58 unsigned short int end; 59 }; 60 61 struct fl_flow_mask { 62 struct fl_flow_key key; 63 struct fl_flow_mask_range range; 64 struct rcu_head rcu; 65 }; 66 67 struct cls_fl_head { 68 struct rhashtable ht; 69 struct fl_flow_mask mask; 70 struct flow_dissector dissector; 71 bool mask_assigned; 72 struct list_head filters; 73 struct rhashtable_params ht_params; 74 union { 75 struct work_struct work; 76 struct rcu_head rcu; 77 }; 78 struct idr handle_idr; 79 }; 80 81 struct cls_fl_filter { 82 struct rhash_head ht_node; 83 struct fl_flow_key mkey; 84 struct tcf_exts exts; 85 struct tcf_result res; 86 struct fl_flow_key key; 87 struct list_head list; 88 u32 handle; 89 u32 flags; 90 union { 91 struct work_struct work; 92 struct rcu_head rcu; 93 }; 94 struct net_device *hw_dev; 95 }; 96 97 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 98 { 99 return mask->range.end - mask->range.start; 100 } 101 102 static void fl_mask_update_range(struct fl_flow_mask *mask) 103 { 104 const u8 *bytes = (const u8 *) &mask->key; 105 size_t size = sizeof(mask->key); 106 size_t i, first = 0, last = size - 1; 107 108 for (i = 0; i < sizeof(mask->key); i++) { 109 if (bytes[i]) { 110 if (!first && i) 111 first = i; 112 last = i; 113 } 114 } 115 mask->range.start = rounddown(first, sizeof(long)); 116 mask->range.end = roundup(last + 1, sizeof(long)); 117 } 118 119 static void *fl_key_get_start(struct fl_flow_key *key, 120 const struct fl_flow_mask *mask) 121 { 122 return (u8 *) key + mask->range.start; 123 } 124 125 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 126 struct fl_flow_mask *mask) 127 { 128 const long *lkey = fl_key_get_start(key, mask); 129 const long *lmask = fl_key_get_start(&mask->key, mask); 130 long *lmkey = fl_key_get_start(mkey, mask); 131 int i; 132 133 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 134 *lmkey++ = *lkey++ & *lmask++; 135 } 136 137 static void fl_clear_masked_range(struct fl_flow_key *key, 138 struct fl_flow_mask *mask) 139 { 140 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 141 } 142 143 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head, 144 struct fl_flow_key *mkey) 145 { 146 return rhashtable_lookup_fast(&head->ht, 147 fl_key_get_start(mkey, &head->mask), 148 head->ht_params); 149 } 150 151 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 152 struct tcf_result *res) 153 { 154 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 155 struct cls_fl_filter *f; 156 struct fl_flow_key skb_key; 157 struct fl_flow_key skb_mkey; 158 159 if (!atomic_read(&head->ht.nelems)) 160 return -1; 161 162 fl_clear_masked_range(&skb_key, &head->mask); 163 164 skb_key.indev_ifindex = skb->skb_iif; 165 /* skb_flow_dissect() does not set n_proto in case an unknown protocol, 166 * so do it rather here. 167 */ 168 skb_key.basic.n_proto = skb->protocol; 169 skb_flow_dissect_tunnel_info(skb, &head->dissector, &skb_key); 170 skb_flow_dissect(skb, &head->dissector, &skb_key, 0); 171 172 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask); 173 174 f = fl_lookup(head, &skb_mkey); 175 if (f && !tc_skip_sw(f->flags)) { 176 *res = f->res; 177 return tcf_exts_exec(skb, &f->exts, res); 178 } 179 return -1; 180 } 181 182 static int fl_init(struct tcf_proto *tp) 183 { 184 struct cls_fl_head *head; 185 186 head = kzalloc(sizeof(*head), GFP_KERNEL); 187 if (!head) 188 return -ENOBUFS; 189 190 INIT_LIST_HEAD_RCU(&head->filters); 191 rcu_assign_pointer(tp->root, head); 192 idr_init(&head->handle_idr); 193 194 return 0; 195 } 196 197 static void __fl_destroy_filter(struct cls_fl_filter *f) 198 { 199 tcf_exts_destroy(&f->exts); 200 tcf_exts_put_net(&f->exts); 201 kfree(f); 202 } 203 204 static void fl_destroy_filter_work(struct work_struct *work) 205 { 206 struct cls_fl_filter *f = container_of(work, struct cls_fl_filter, work); 207 208 rtnl_lock(); 209 __fl_destroy_filter(f); 210 rtnl_unlock(); 211 } 212 213 static void fl_destroy_filter(struct rcu_head *head) 214 { 215 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu); 216 217 INIT_WORK(&f->work, fl_destroy_filter_work); 218 tcf_queue_work(&f->work); 219 } 220 221 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f) 222 { 223 struct tc_cls_flower_offload cls_flower = {}; 224 struct tcf_block *block = tp->chain->block; 225 226 tc_cls_common_offload_init(&cls_flower.common, tp); 227 cls_flower.command = TC_CLSFLOWER_DESTROY; 228 cls_flower.cookie = (unsigned long) f; 229 230 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 231 &cls_flower, false); 232 } 233 234 static int fl_hw_replace_filter(struct tcf_proto *tp, 235 struct flow_dissector *dissector, 236 struct fl_flow_key *mask, 237 struct cls_fl_filter *f) 238 { 239 struct tc_cls_flower_offload cls_flower = {}; 240 struct tcf_block *block = tp->chain->block; 241 bool skip_sw = tc_skip_sw(f->flags); 242 int err; 243 244 tc_cls_common_offload_init(&cls_flower.common, tp); 245 cls_flower.command = TC_CLSFLOWER_REPLACE; 246 cls_flower.cookie = (unsigned long) f; 247 cls_flower.dissector = dissector; 248 cls_flower.mask = mask; 249 cls_flower.key = &f->mkey; 250 cls_flower.exts = &f->exts; 251 cls_flower.classid = f->res.classid; 252 253 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 254 &cls_flower, skip_sw); 255 if (err < 0) { 256 fl_hw_destroy_filter(tp, f); 257 return err; 258 } else if (err > 0) { 259 f->flags |= TCA_CLS_FLAGS_IN_HW; 260 } 261 262 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 263 return -EINVAL; 264 265 return 0; 266 } 267 268 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 269 { 270 struct tc_cls_flower_offload cls_flower = {}; 271 struct tcf_block *block = tp->chain->block; 272 273 tc_cls_common_offload_init(&cls_flower.common, tp); 274 cls_flower.command = TC_CLSFLOWER_STATS; 275 cls_flower.cookie = (unsigned long) f; 276 cls_flower.exts = &f->exts; 277 cls_flower.classid = f->res.classid; 278 279 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 280 &cls_flower, false); 281 } 282 283 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f) 284 { 285 struct cls_fl_head *head = rtnl_dereference(tp->root); 286 287 idr_remove_ext(&head->handle_idr, f->handle); 288 list_del_rcu(&f->list); 289 if (!tc_skip_hw(f->flags)) 290 fl_hw_destroy_filter(tp, f); 291 tcf_unbind_filter(tp, &f->res); 292 if (tcf_exts_get_net(&f->exts)) 293 call_rcu(&f->rcu, fl_destroy_filter); 294 else 295 __fl_destroy_filter(f); 296 } 297 298 static void fl_destroy_sleepable(struct work_struct *work) 299 { 300 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 301 work); 302 if (head->mask_assigned) 303 rhashtable_destroy(&head->ht); 304 kfree(head); 305 module_put(THIS_MODULE); 306 } 307 308 static void fl_destroy_rcu(struct rcu_head *rcu) 309 { 310 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 311 312 INIT_WORK(&head->work, fl_destroy_sleepable); 313 schedule_work(&head->work); 314 } 315 316 static void fl_destroy(struct tcf_proto *tp) 317 { 318 struct cls_fl_head *head = rtnl_dereference(tp->root); 319 struct cls_fl_filter *f, *next; 320 321 list_for_each_entry_safe(f, next, &head->filters, list) 322 __fl_delete(tp, f); 323 idr_destroy(&head->handle_idr); 324 325 __module_get(THIS_MODULE); 326 call_rcu(&head->rcu, fl_destroy_rcu); 327 } 328 329 static void *fl_get(struct tcf_proto *tp, u32 handle) 330 { 331 struct cls_fl_head *head = rtnl_dereference(tp->root); 332 333 return idr_find_ext(&head->handle_idr, handle); 334 } 335 336 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 337 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 338 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 339 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 340 .len = IFNAMSIZ }, 341 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 342 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 343 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 344 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 345 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 346 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 347 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 348 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 349 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 350 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 351 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 352 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 353 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 354 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 355 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 356 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 357 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 358 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 359 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 360 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 361 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 362 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 363 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 364 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 365 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 366 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 367 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 368 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 369 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 370 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 371 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 372 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 373 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 374 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 375 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 376 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 377 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 378 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 379 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 380 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 381 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 382 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 383 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 384 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 385 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 386 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 387 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 388 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 389 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 390 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 391 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 392 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 393 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 394 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 395 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 396 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 397 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 398 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 399 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 400 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 401 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 402 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 403 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 404 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 405 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 406 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 407 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 408 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 409 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 410 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 411 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 412 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 413 }; 414 415 static void fl_set_key_val(struct nlattr **tb, 416 void *val, int val_type, 417 void *mask, int mask_type, int len) 418 { 419 if (!tb[val_type]) 420 return; 421 memcpy(val, nla_data(tb[val_type]), len); 422 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 423 memset(mask, 0xff, len); 424 else 425 memcpy(mask, nla_data(tb[mask_type]), len); 426 } 427 428 static int fl_set_key_mpls(struct nlattr **tb, 429 struct flow_dissector_key_mpls *key_val, 430 struct flow_dissector_key_mpls *key_mask) 431 { 432 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 433 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 434 key_mask->mpls_ttl = MPLS_TTL_MASK; 435 } 436 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 437 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 438 439 if (bos & ~MPLS_BOS_MASK) 440 return -EINVAL; 441 key_val->mpls_bos = bos; 442 key_mask->mpls_bos = MPLS_BOS_MASK; 443 } 444 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 445 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 446 447 if (tc & ~MPLS_TC_MASK) 448 return -EINVAL; 449 key_val->mpls_tc = tc; 450 key_mask->mpls_tc = MPLS_TC_MASK; 451 } 452 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 453 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 454 455 if (label & ~MPLS_LABEL_MASK) 456 return -EINVAL; 457 key_val->mpls_label = label; 458 key_mask->mpls_label = MPLS_LABEL_MASK; 459 } 460 return 0; 461 } 462 463 static void fl_set_key_vlan(struct nlattr **tb, 464 struct flow_dissector_key_vlan *key_val, 465 struct flow_dissector_key_vlan *key_mask) 466 { 467 #define VLAN_PRIORITY_MASK 0x7 468 469 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 470 key_val->vlan_id = 471 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 472 key_mask->vlan_id = VLAN_VID_MASK; 473 } 474 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 475 key_val->vlan_priority = 476 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 477 VLAN_PRIORITY_MASK; 478 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 479 } 480 } 481 482 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 483 u32 *dissector_key, u32 *dissector_mask, 484 u32 flower_flag_bit, u32 dissector_flag_bit) 485 { 486 if (flower_mask & flower_flag_bit) { 487 *dissector_mask |= dissector_flag_bit; 488 if (flower_key & flower_flag_bit) 489 *dissector_key |= dissector_flag_bit; 490 } 491 } 492 493 static int fl_set_key_flags(struct nlattr **tb, 494 u32 *flags_key, u32 *flags_mask) 495 { 496 u32 key, mask; 497 498 /* mask is mandatory for flags */ 499 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 500 return -EINVAL; 501 502 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 503 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 504 505 *flags_key = 0; 506 *flags_mask = 0; 507 508 fl_set_key_flag(key, mask, flags_key, flags_mask, 509 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 510 511 return 0; 512 } 513 514 static void fl_set_key_ip(struct nlattr **tb, 515 struct flow_dissector_key_ip *key, 516 struct flow_dissector_key_ip *mask) 517 { 518 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS, 519 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK, 520 sizeof(key->tos)); 521 522 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, 523 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK, 524 sizeof(key->ttl)); 525 } 526 527 static int fl_set_key(struct net *net, struct nlattr **tb, 528 struct fl_flow_key *key, struct fl_flow_key *mask) 529 { 530 __be16 ethertype; 531 int ret = 0; 532 #ifdef CONFIG_NET_CLS_IND 533 if (tb[TCA_FLOWER_INDEV]) { 534 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]); 535 if (err < 0) 536 return err; 537 key->indev_ifindex = err; 538 mask->indev_ifindex = 0xffffffff; 539 } 540 #endif 541 542 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 543 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 544 sizeof(key->eth.dst)); 545 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 546 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 547 sizeof(key->eth.src)); 548 549 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 550 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 551 552 if (ethertype == htons(ETH_P_8021Q)) { 553 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 554 fl_set_key_val(tb, &key->basic.n_proto, 555 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 556 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 557 sizeof(key->basic.n_proto)); 558 } else { 559 key->basic.n_proto = ethertype; 560 mask->basic.n_proto = cpu_to_be16(~0); 561 } 562 } 563 564 if (key->basic.n_proto == htons(ETH_P_IP) || 565 key->basic.n_proto == htons(ETH_P_IPV6)) { 566 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 567 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 568 sizeof(key->basic.ip_proto)); 569 fl_set_key_ip(tb, &key->ip, &mask->ip); 570 } 571 572 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 573 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 574 mask->control.addr_type = ~0; 575 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 576 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 577 sizeof(key->ipv4.src)); 578 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 579 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 580 sizeof(key->ipv4.dst)); 581 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 582 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 583 mask->control.addr_type = ~0; 584 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 585 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 586 sizeof(key->ipv6.src)); 587 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 588 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 589 sizeof(key->ipv6.dst)); 590 } 591 592 if (key->basic.ip_proto == IPPROTO_TCP) { 593 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 594 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 595 sizeof(key->tp.src)); 596 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 597 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 598 sizeof(key->tp.dst)); 599 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 600 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 601 sizeof(key->tcp.flags)); 602 } else if (key->basic.ip_proto == IPPROTO_UDP) { 603 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 604 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 605 sizeof(key->tp.src)); 606 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 607 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 608 sizeof(key->tp.dst)); 609 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 610 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 611 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 612 sizeof(key->tp.src)); 613 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 614 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 615 sizeof(key->tp.dst)); 616 } else if (key->basic.n_proto == htons(ETH_P_IP) && 617 key->basic.ip_proto == IPPROTO_ICMP) { 618 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 619 &mask->icmp.type, 620 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 621 sizeof(key->icmp.type)); 622 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 623 &mask->icmp.code, 624 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 625 sizeof(key->icmp.code)); 626 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 627 key->basic.ip_proto == IPPROTO_ICMPV6) { 628 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 629 &mask->icmp.type, 630 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 631 sizeof(key->icmp.type)); 632 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 633 &mask->icmp.code, 634 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 635 sizeof(key->icmp.code)); 636 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 637 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 638 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 639 if (ret) 640 return ret; 641 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 642 key->basic.n_proto == htons(ETH_P_RARP)) { 643 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 644 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 645 sizeof(key->arp.sip)); 646 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 647 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 648 sizeof(key->arp.tip)); 649 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 650 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 651 sizeof(key->arp.op)); 652 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 653 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 654 sizeof(key->arp.sha)); 655 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 656 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 657 sizeof(key->arp.tha)); 658 } 659 660 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 661 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 662 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 663 mask->enc_control.addr_type = ~0; 664 fl_set_key_val(tb, &key->enc_ipv4.src, 665 TCA_FLOWER_KEY_ENC_IPV4_SRC, 666 &mask->enc_ipv4.src, 667 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 668 sizeof(key->enc_ipv4.src)); 669 fl_set_key_val(tb, &key->enc_ipv4.dst, 670 TCA_FLOWER_KEY_ENC_IPV4_DST, 671 &mask->enc_ipv4.dst, 672 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 673 sizeof(key->enc_ipv4.dst)); 674 } 675 676 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 677 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 678 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 679 mask->enc_control.addr_type = ~0; 680 fl_set_key_val(tb, &key->enc_ipv6.src, 681 TCA_FLOWER_KEY_ENC_IPV6_SRC, 682 &mask->enc_ipv6.src, 683 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 684 sizeof(key->enc_ipv6.src)); 685 fl_set_key_val(tb, &key->enc_ipv6.dst, 686 TCA_FLOWER_KEY_ENC_IPV6_DST, 687 &mask->enc_ipv6.dst, 688 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 689 sizeof(key->enc_ipv6.dst)); 690 } 691 692 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 693 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 694 sizeof(key->enc_key_id.keyid)); 695 696 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 697 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 698 sizeof(key->enc_tp.src)); 699 700 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 701 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 702 sizeof(key->enc_tp.dst)); 703 704 if (tb[TCA_FLOWER_KEY_FLAGS]) 705 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 706 707 return ret; 708 } 709 710 static bool fl_mask_eq(struct fl_flow_mask *mask1, 711 struct fl_flow_mask *mask2) 712 { 713 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 714 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 715 716 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 717 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 718 } 719 720 static const struct rhashtable_params fl_ht_params = { 721 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 722 .head_offset = offsetof(struct cls_fl_filter, ht_node), 723 .automatic_shrinking = true, 724 }; 725 726 static int fl_init_hashtable(struct cls_fl_head *head, 727 struct fl_flow_mask *mask) 728 { 729 head->ht_params = fl_ht_params; 730 head->ht_params.key_len = fl_mask_range(mask); 731 head->ht_params.key_offset += mask->range.start; 732 733 return rhashtable_init(&head->ht, &head->ht_params); 734 } 735 736 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 737 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 738 739 #define FL_KEY_IS_MASKED(mask, member) \ 740 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 741 0, FL_KEY_MEMBER_SIZE(member)) \ 742 743 #define FL_KEY_SET(keys, cnt, id, member) \ 744 do { \ 745 keys[cnt].key_id = id; \ 746 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 747 cnt++; \ 748 } while(0); 749 750 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 751 do { \ 752 if (FL_KEY_IS_MASKED(mask, member)) \ 753 FL_KEY_SET(keys, cnt, id, member); \ 754 } while(0); 755 756 static void fl_init_dissector(struct cls_fl_head *head, 757 struct fl_flow_mask *mask) 758 { 759 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 760 size_t cnt = 0; 761 762 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 763 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 764 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 765 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 766 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 767 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 768 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 769 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 770 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 771 FLOW_DISSECTOR_KEY_PORTS, tp); 772 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 773 FLOW_DISSECTOR_KEY_IP, ip); 774 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 775 FLOW_DISSECTOR_KEY_TCP, tcp); 776 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 777 FLOW_DISSECTOR_KEY_ICMP, icmp); 778 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 779 FLOW_DISSECTOR_KEY_ARP, arp); 780 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 781 FLOW_DISSECTOR_KEY_MPLS, mpls); 782 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 783 FLOW_DISSECTOR_KEY_VLAN, vlan); 784 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 785 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 786 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 787 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 788 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 789 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 790 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 791 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 792 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 793 enc_control); 794 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 795 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 796 797 skb_flow_dissector_init(&head->dissector, keys, cnt); 798 } 799 800 static int fl_check_assign_mask(struct cls_fl_head *head, 801 struct fl_flow_mask *mask) 802 { 803 int err; 804 805 if (head->mask_assigned) { 806 if (!fl_mask_eq(&head->mask, mask)) 807 return -EINVAL; 808 else 809 return 0; 810 } 811 812 /* Mask is not assigned yet. So assign it and init hashtable 813 * according to that. 814 */ 815 err = fl_init_hashtable(head, mask); 816 if (err) 817 return err; 818 memcpy(&head->mask, mask, sizeof(head->mask)); 819 head->mask_assigned = true; 820 821 fl_init_dissector(head, mask); 822 823 return 0; 824 } 825 826 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 827 struct cls_fl_filter *f, struct fl_flow_mask *mask, 828 unsigned long base, struct nlattr **tb, 829 struct nlattr *est, bool ovr) 830 { 831 int err; 832 833 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr); 834 if (err < 0) 835 return err; 836 837 if (tb[TCA_FLOWER_CLASSID]) { 838 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 839 tcf_bind_filter(tp, &f->res, base); 840 } 841 842 err = fl_set_key(net, tb, &f->key, &mask->key); 843 if (err) 844 return err; 845 846 fl_mask_update_range(mask); 847 fl_set_masked_key(&f->mkey, &f->key, mask); 848 849 return 0; 850 } 851 852 static int fl_change(struct net *net, struct sk_buff *in_skb, 853 struct tcf_proto *tp, unsigned long base, 854 u32 handle, struct nlattr **tca, 855 void **arg, bool ovr) 856 { 857 struct cls_fl_head *head = rtnl_dereference(tp->root); 858 struct cls_fl_filter *fold = *arg; 859 struct cls_fl_filter *fnew; 860 struct nlattr **tb; 861 struct fl_flow_mask mask = {}; 862 unsigned long idr_index; 863 int err; 864 865 if (!tca[TCA_OPTIONS]) 866 return -EINVAL; 867 868 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 869 if (!tb) 870 return -ENOBUFS; 871 872 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 873 fl_policy, NULL); 874 if (err < 0) 875 goto errout_tb; 876 877 if (fold && handle && fold->handle != handle) { 878 err = -EINVAL; 879 goto errout_tb; 880 } 881 882 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 883 if (!fnew) { 884 err = -ENOBUFS; 885 goto errout_tb; 886 } 887 888 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 889 if (err < 0) 890 goto errout; 891 892 if (!handle) { 893 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index, 894 1, 0x80000000, GFP_KERNEL); 895 if (err) 896 goto errout; 897 fnew->handle = idr_index; 898 } 899 900 /* user specifies a handle and it doesn't exist */ 901 if (handle && !fold) { 902 err = idr_alloc_ext(&head->handle_idr, fnew, &idr_index, 903 handle, handle + 1, GFP_KERNEL); 904 if (err) 905 goto errout; 906 fnew->handle = idr_index; 907 } 908 909 if (tb[TCA_FLOWER_FLAGS]) { 910 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 911 912 if (!tc_flags_valid(fnew->flags)) { 913 err = -EINVAL; 914 goto errout_idr; 915 } 916 } 917 918 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr); 919 if (err) 920 goto errout_idr; 921 922 err = fl_check_assign_mask(head, &mask); 923 if (err) 924 goto errout_idr; 925 926 if (!tc_skip_sw(fnew->flags)) { 927 if (!fold && fl_lookup(head, &fnew->mkey)) { 928 err = -EEXIST; 929 goto errout_idr; 930 } 931 932 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 933 head->ht_params); 934 if (err) 935 goto errout_idr; 936 } 937 938 if (!tc_skip_hw(fnew->flags)) { 939 err = fl_hw_replace_filter(tp, 940 &head->dissector, 941 &mask.key, 942 fnew); 943 if (err) 944 goto errout_idr; 945 } 946 947 if (!tc_in_hw(fnew->flags)) 948 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 949 950 if (fold) { 951 if (!tc_skip_sw(fold->flags)) 952 rhashtable_remove_fast(&head->ht, &fold->ht_node, 953 head->ht_params); 954 if (!tc_skip_hw(fold->flags)) 955 fl_hw_destroy_filter(tp, fold); 956 } 957 958 *arg = fnew; 959 960 if (fold) { 961 fnew->handle = handle; 962 idr_replace_ext(&head->handle_idr, fnew, fnew->handle); 963 list_replace_rcu(&fold->list, &fnew->list); 964 tcf_unbind_filter(tp, &fold->res); 965 tcf_exts_get_net(&fold->exts); 966 call_rcu(&fold->rcu, fl_destroy_filter); 967 } else { 968 list_add_tail_rcu(&fnew->list, &head->filters); 969 } 970 971 kfree(tb); 972 return 0; 973 974 errout_idr: 975 if (fnew->handle) 976 idr_remove_ext(&head->handle_idr, fnew->handle); 977 errout: 978 tcf_exts_destroy(&fnew->exts); 979 kfree(fnew); 980 errout_tb: 981 kfree(tb); 982 return err; 983 } 984 985 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last) 986 { 987 struct cls_fl_head *head = rtnl_dereference(tp->root); 988 struct cls_fl_filter *f = arg; 989 990 if (!tc_skip_sw(f->flags)) 991 rhashtable_remove_fast(&head->ht, &f->ht_node, 992 head->ht_params); 993 __fl_delete(tp, f); 994 *last = list_empty(&head->filters); 995 return 0; 996 } 997 998 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 999 { 1000 struct cls_fl_head *head = rtnl_dereference(tp->root); 1001 struct cls_fl_filter *f; 1002 1003 list_for_each_entry_rcu(f, &head->filters, list) { 1004 if (arg->count < arg->skip) 1005 goto skip; 1006 if (arg->fn(tp, f, arg) < 0) { 1007 arg->stop = 1; 1008 break; 1009 } 1010 skip: 1011 arg->count++; 1012 } 1013 } 1014 1015 static int fl_dump_key_val(struct sk_buff *skb, 1016 void *val, int val_type, 1017 void *mask, int mask_type, int len) 1018 { 1019 int err; 1020 1021 if (!memchr_inv(mask, 0, len)) 1022 return 0; 1023 err = nla_put(skb, val_type, len, val); 1024 if (err) 1025 return err; 1026 if (mask_type != TCA_FLOWER_UNSPEC) { 1027 err = nla_put(skb, mask_type, len, mask); 1028 if (err) 1029 return err; 1030 } 1031 return 0; 1032 } 1033 1034 static int fl_dump_key_mpls(struct sk_buff *skb, 1035 struct flow_dissector_key_mpls *mpls_key, 1036 struct flow_dissector_key_mpls *mpls_mask) 1037 { 1038 int err; 1039 1040 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1041 return 0; 1042 if (mpls_mask->mpls_ttl) { 1043 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1044 mpls_key->mpls_ttl); 1045 if (err) 1046 return err; 1047 } 1048 if (mpls_mask->mpls_tc) { 1049 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1050 mpls_key->mpls_tc); 1051 if (err) 1052 return err; 1053 } 1054 if (mpls_mask->mpls_label) { 1055 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1056 mpls_key->mpls_label); 1057 if (err) 1058 return err; 1059 } 1060 if (mpls_mask->mpls_bos) { 1061 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1062 mpls_key->mpls_bos); 1063 if (err) 1064 return err; 1065 } 1066 return 0; 1067 } 1068 1069 static int fl_dump_key_ip(struct sk_buff *skb, 1070 struct flow_dissector_key_ip *key, 1071 struct flow_dissector_key_ip *mask) 1072 { 1073 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos, 1074 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) || 1075 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl, 1076 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl))) 1077 return -1; 1078 1079 return 0; 1080 } 1081 1082 static int fl_dump_key_vlan(struct sk_buff *skb, 1083 struct flow_dissector_key_vlan *vlan_key, 1084 struct flow_dissector_key_vlan *vlan_mask) 1085 { 1086 int err; 1087 1088 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1089 return 0; 1090 if (vlan_mask->vlan_id) { 1091 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 1092 vlan_key->vlan_id); 1093 if (err) 1094 return err; 1095 } 1096 if (vlan_mask->vlan_priority) { 1097 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 1098 vlan_key->vlan_priority); 1099 if (err) 1100 return err; 1101 } 1102 return 0; 1103 } 1104 1105 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1106 u32 *flower_key, u32 *flower_mask, 1107 u32 flower_flag_bit, u32 dissector_flag_bit) 1108 { 1109 if (dissector_mask & dissector_flag_bit) { 1110 *flower_mask |= flower_flag_bit; 1111 if (dissector_key & dissector_flag_bit) 1112 *flower_key |= flower_flag_bit; 1113 } 1114 } 1115 1116 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1117 { 1118 u32 key, mask; 1119 __be32 _key, _mask; 1120 int err; 1121 1122 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1123 return 0; 1124 1125 key = 0; 1126 mask = 0; 1127 1128 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1129 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1130 1131 _key = cpu_to_be32(key); 1132 _mask = cpu_to_be32(mask); 1133 1134 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1135 if (err) 1136 return err; 1137 1138 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1139 } 1140 1141 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1142 struct sk_buff *skb, struct tcmsg *t) 1143 { 1144 struct cls_fl_head *head = rtnl_dereference(tp->root); 1145 struct cls_fl_filter *f = fh; 1146 struct nlattr *nest; 1147 struct fl_flow_key *key, *mask; 1148 1149 if (!f) 1150 return skb->len; 1151 1152 t->tcm_handle = f->handle; 1153 1154 nest = nla_nest_start(skb, TCA_OPTIONS); 1155 if (!nest) 1156 goto nla_put_failure; 1157 1158 if (f->res.classid && 1159 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1160 goto nla_put_failure; 1161 1162 key = &f->key; 1163 mask = &head->mask.key; 1164 1165 if (mask->indev_ifindex) { 1166 struct net_device *dev; 1167 1168 dev = __dev_get_by_index(net, key->indev_ifindex); 1169 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1170 goto nla_put_failure; 1171 } 1172 1173 if (!tc_skip_hw(f->flags)) 1174 fl_hw_update_stats(tp, f); 1175 1176 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1177 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1178 sizeof(key->eth.dst)) || 1179 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1180 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1181 sizeof(key->eth.src)) || 1182 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1183 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1184 sizeof(key->basic.n_proto))) 1185 goto nla_put_failure; 1186 1187 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1188 goto nla_put_failure; 1189 1190 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1191 goto nla_put_failure; 1192 1193 if ((key->basic.n_proto == htons(ETH_P_IP) || 1194 key->basic.n_proto == htons(ETH_P_IPV6)) && 1195 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1196 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1197 sizeof(key->basic.ip_proto)) || 1198 fl_dump_key_ip(skb, &key->ip, &mask->ip))) 1199 goto nla_put_failure; 1200 1201 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1202 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1203 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1204 sizeof(key->ipv4.src)) || 1205 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1206 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1207 sizeof(key->ipv4.dst)))) 1208 goto nla_put_failure; 1209 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1210 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1211 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1212 sizeof(key->ipv6.src)) || 1213 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1214 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1215 sizeof(key->ipv6.dst)))) 1216 goto nla_put_failure; 1217 1218 if (key->basic.ip_proto == IPPROTO_TCP && 1219 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1220 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1221 sizeof(key->tp.src)) || 1222 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1223 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1224 sizeof(key->tp.dst)) || 1225 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1226 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1227 sizeof(key->tcp.flags)))) 1228 goto nla_put_failure; 1229 else if (key->basic.ip_proto == IPPROTO_UDP && 1230 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1231 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1232 sizeof(key->tp.src)) || 1233 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1234 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1235 sizeof(key->tp.dst)))) 1236 goto nla_put_failure; 1237 else if (key->basic.ip_proto == IPPROTO_SCTP && 1238 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1239 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1240 sizeof(key->tp.src)) || 1241 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1242 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1243 sizeof(key->tp.dst)))) 1244 goto nla_put_failure; 1245 else if (key->basic.n_proto == htons(ETH_P_IP) && 1246 key->basic.ip_proto == IPPROTO_ICMP && 1247 (fl_dump_key_val(skb, &key->icmp.type, 1248 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1249 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1250 sizeof(key->icmp.type)) || 1251 fl_dump_key_val(skb, &key->icmp.code, 1252 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1253 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1254 sizeof(key->icmp.code)))) 1255 goto nla_put_failure; 1256 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1257 key->basic.ip_proto == IPPROTO_ICMPV6 && 1258 (fl_dump_key_val(skb, &key->icmp.type, 1259 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1260 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1261 sizeof(key->icmp.type)) || 1262 fl_dump_key_val(skb, &key->icmp.code, 1263 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1264 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1265 sizeof(key->icmp.code)))) 1266 goto nla_put_failure; 1267 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1268 key->basic.n_proto == htons(ETH_P_RARP)) && 1269 (fl_dump_key_val(skb, &key->arp.sip, 1270 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1271 TCA_FLOWER_KEY_ARP_SIP_MASK, 1272 sizeof(key->arp.sip)) || 1273 fl_dump_key_val(skb, &key->arp.tip, 1274 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1275 TCA_FLOWER_KEY_ARP_TIP_MASK, 1276 sizeof(key->arp.tip)) || 1277 fl_dump_key_val(skb, &key->arp.op, 1278 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1279 TCA_FLOWER_KEY_ARP_OP_MASK, 1280 sizeof(key->arp.op)) || 1281 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1282 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1283 sizeof(key->arp.sha)) || 1284 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1285 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1286 sizeof(key->arp.tha)))) 1287 goto nla_put_failure; 1288 1289 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1290 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1291 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1292 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1293 sizeof(key->enc_ipv4.src)) || 1294 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1295 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1296 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1297 sizeof(key->enc_ipv4.dst)))) 1298 goto nla_put_failure; 1299 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1300 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1301 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1302 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1303 sizeof(key->enc_ipv6.src)) || 1304 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1305 TCA_FLOWER_KEY_ENC_IPV6_DST, 1306 &mask->enc_ipv6.dst, 1307 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1308 sizeof(key->enc_ipv6.dst)))) 1309 goto nla_put_failure; 1310 1311 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1312 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1313 sizeof(key->enc_key_id)) || 1314 fl_dump_key_val(skb, &key->enc_tp.src, 1315 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1316 &mask->enc_tp.src, 1317 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1318 sizeof(key->enc_tp.src)) || 1319 fl_dump_key_val(skb, &key->enc_tp.dst, 1320 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1321 &mask->enc_tp.dst, 1322 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1323 sizeof(key->enc_tp.dst))) 1324 goto nla_put_failure; 1325 1326 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1327 goto nla_put_failure; 1328 1329 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1330 goto nla_put_failure; 1331 1332 if (tcf_exts_dump(skb, &f->exts)) 1333 goto nla_put_failure; 1334 1335 nla_nest_end(skb, nest); 1336 1337 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1338 goto nla_put_failure; 1339 1340 return skb->len; 1341 1342 nla_put_failure: 1343 nla_nest_cancel(skb, nest); 1344 return -1; 1345 } 1346 1347 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1348 { 1349 struct cls_fl_filter *f = fh; 1350 1351 if (f && f->res.classid == classid) 1352 f->res.class = cl; 1353 } 1354 1355 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1356 .kind = "flower", 1357 .classify = fl_classify, 1358 .init = fl_init, 1359 .destroy = fl_destroy, 1360 .get = fl_get, 1361 .change = fl_change, 1362 .delete = fl_delete, 1363 .walk = fl_walk, 1364 .dump = fl_dump, 1365 .bind_class = fl_bind_class, 1366 .owner = THIS_MODULE, 1367 }; 1368 1369 static int __init cls_fl_init(void) 1370 { 1371 return register_tcf_proto_ops(&cls_fl_ops); 1372 } 1373 1374 static void __exit cls_fl_exit(void) 1375 { 1376 unregister_tcf_proto_ops(&cls_fl_ops); 1377 } 1378 1379 module_init(cls_fl_init); 1380 module_exit(cls_fl_exit); 1381 1382 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1383 MODULE_DESCRIPTION("Flower classifier"); 1384 MODULE_LICENSE("GPL v2"); 1385