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 struct netlink_ext_ack *extack) 223 { 224 struct tc_cls_flower_offload cls_flower = {}; 225 struct tcf_block *block = tp->chain->block; 226 227 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 228 cls_flower.command = TC_CLSFLOWER_DESTROY; 229 cls_flower.cookie = (unsigned long) f; 230 231 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 232 &cls_flower, false); 233 tcf_block_offload_dec(block, &f->flags); 234 } 235 236 static int fl_hw_replace_filter(struct tcf_proto *tp, 237 struct flow_dissector *dissector, 238 struct fl_flow_key *mask, 239 struct cls_fl_filter *f, 240 struct netlink_ext_ack *extack) 241 { 242 struct tc_cls_flower_offload cls_flower = {}; 243 struct tcf_block *block = tp->chain->block; 244 bool skip_sw = tc_skip_sw(f->flags); 245 int err; 246 247 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 248 cls_flower.command = TC_CLSFLOWER_REPLACE; 249 cls_flower.cookie = (unsigned long) f; 250 cls_flower.dissector = dissector; 251 cls_flower.mask = mask; 252 cls_flower.key = &f->mkey; 253 cls_flower.exts = &f->exts; 254 cls_flower.classid = f->res.classid; 255 256 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 257 &cls_flower, skip_sw); 258 if (err < 0) { 259 fl_hw_destroy_filter(tp, f, NULL); 260 return err; 261 } else if (err > 0) { 262 tcf_block_offload_inc(block, &f->flags); 263 } 264 265 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 266 return -EINVAL; 267 268 return 0; 269 } 270 271 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 272 { 273 struct tc_cls_flower_offload cls_flower = {}; 274 struct tcf_block *block = tp->chain->block; 275 276 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 277 cls_flower.command = TC_CLSFLOWER_STATS; 278 cls_flower.cookie = (unsigned long) f; 279 cls_flower.exts = &f->exts; 280 cls_flower.classid = f->res.classid; 281 282 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 283 &cls_flower, false); 284 } 285 286 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 287 struct netlink_ext_ack *extack) 288 { 289 struct cls_fl_head *head = rtnl_dereference(tp->root); 290 291 idr_remove(&head->handle_idr, f->handle); 292 list_del_rcu(&f->list); 293 if (!tc_skip_hw(f->flags)) 294 fl_hw_destroy_filter(tp, f, extack); 295 tcf_unbind_filter(tp, &f->res); 296 if (tcf_exts_get_net(&f->exts)) 297 call_rcu(&f->rcu, fl_destroy_filter); 298 else 299 __fl_destroy_filter(f); 300 } 301 302 static void fl_destroy_sleepable(struct work_struct *work) 303 { 304 struct cls_fl_head *head = container_of(work, struct cls_fl_head, 305 work); 306 if (head->mask_assigned) 307 rhashtable_destroy(&head->ht); 308 kfree(head); 309 module_put(THIS_MODULE); 310 } 311 312 static void fl_destroy_rcu(struct rcu_head *rcu) 313 { 314 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu); 315 316 INIT_WORK(&head->work, fl_destroy_sleepable); 317 schedule_work(&head->work); 318 } 319 320 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack) 321 { 322 struct cls_fl_head *head = rtnl_dereference(tp->root); 323 struct cls_fl_filter *f, *next; 324 325 list_for_each_entry_safe(f, next, &head->filters, list) 326 __fl_delete(tp, f, extack); 327 idr_destroy(&head->handle_idr); 328 329 __module_get(THIS_MODULE); 330 call_rcu(&head->rcu, fl_destroy_rcu); 331 } 332 333 static void *fl_get(struct tcf_proto *tp, u32 handle) 334 { 335 struct cls_fl_head *head = rtnl_dereference(tp->root); 336 337 return idr_find(&head->handle_idr, handle); 338 } 339 340 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 341 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 342 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 343 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 344 .len = IFNAMSIZ }, 345 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 346 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 347 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 348 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 349 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 350 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 351 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 352 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 353 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 354 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 355 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 356 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 357 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 358 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 359 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 360 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 361 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 362 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 363 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 364 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 365 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 366 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 367 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 368 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 369 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 370 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 371 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 372 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 373 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 374 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 375 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 376 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 377 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 378 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 379 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 380 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 381 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 382 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 383 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 384 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 385 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 386 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 387 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 388 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 389 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 390 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 391 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 392 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 393 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 394 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 395 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 396 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 397 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 398 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 399 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 400 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 401 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 402 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 403 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 404 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 405 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 406 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 407 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 408 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 409 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 410 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 411 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 412 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 413 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 414 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 415 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 416 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 417 }; 418 419 static void fl_set_key_val(struct nlattr **tb, 420 void *val, int val_type, 421 void *mask, int mask_type, int len) 422 { 423 if (!tb[val_type]) 424 return; 425 memcpy(val, nla_data(tb[val_type]), len); 426 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 427 memset(mask, 0xff, len); 428 else 429 memcpy(mask, nla_data(tb[mask_type]), len); 430 } 431 432 static int fl_set_key_mpls(struct nlattr **tb, 433 struct flow_dissector_key_mpls *key_val, 434 struct flow_dissector_key_mpls *key_mask) 435 { 436 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 437 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 438 key_mask->mpls_ttl = MPLS_TTL_MASK; 439 } 440 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 441 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 442 443 if (bos & ~MPLS_BOS_MASK) 444 return -EINVAL; 445 key_val->mpls_bos = bos; 446 key_mask->mpls_bos = MPLS_BOS_MASK; 447 } 448 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 449 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 450 451 if (tc & ~MPLS_TC_MASK) 452 return -EINVAL; 453 key_val->mpls_tc = tc; 454 key_mask->mpls_tc = MPLS_TC_MASK; 455 } 456 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 457 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 458 459 if (label & ~MPLS_LABEL_MASK) 460 return -EINVAL; 461 key_val->mpls_label = label; 462 key_mask->mpls_label = MPLS_LABEL_MASK; 463 } 464 return 0; 465 } 466 467 static void fl_set_key_vlan(struct nlattr **tb, 468 struct flow_dissector_key_vlan *key_val, 469 struct flow_dissector_key_vlan *key_mask) 470 { 471 #define VLAN_PRIORITY_MASK 0x7 472 473 if (tb[TCA_FLOWER_KEY_VLAN_ID]) { 474 key_val->vlan_id = 475 nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK; 476 key_mask->vlan_id = VLAN_VID_MASK; 477 } 478 if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) { 479 key_val->vlan_priority = 480 nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) & 481 VLAN_PRIORITY_MASK; 482 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 483 } 484 } 485 486 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 487 u32 *dissector_key, u32 *dissector_mask, 488 u32 flower_flag_bit, u32 dissector_flag_bit) 489 { 490 if (flower_mask & flower_flag_bit) { 491 *dissector_mask |= dissector_flag_bit; 492 if (flower_key & flower_flag_bit) 493 *dissector_key |= dissector_flag_bit; 494 } 495 } 496 497 static int fl_set_key_flags(struct nlattr **tb, 498 u32 *flags_key, u32 *flags_mask) 499 { 500 u32 key, mask; 501 502 /* mask is mandatory for flags */ 503 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 504 return -EINVAL; 505 506 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 507 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 508 509 *flags_key = 0; 510 *flags_mask = 0; 511 512 fl_set_key_flag(key, mask, flags_key, flags_mask, 513 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 514 fl_set_key_flag(key, mask, flags_key, flags_mask, 515 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 516 FLOW_DIS_FIRST_FRAG); 517 518 return 0; 519 } 520 521 static void fl_set_key_ip(struct nlattr **tb, 522 struct flow_dissector_key_ip *key, 523 struct flow_dissector_key_ip *mask) 524 { 525 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS, 526 &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK, 527 sizeof(key->tos)); 528 529 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, 530 &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK, 531 sizeof(key->ttl)); 532 } 533 534 static int fl_set_key(struct net *net, struct nlattr **tb, 535 struct fl_flow_key *key, struct fl_flow_key *mask, 536 struct netlink_ext_ack *extack) 537 { 538 __be16 ethertype; 539 int ret = 0; 540 #ifdef CONFIG_NET_CLS_IND 541 if (tb[TCA_FLOWER_INDEV]) { 542 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 543 if (err < 0) 544 return err; 545 key->indev_ifindex = err; 546 mask->indev_ifindex = 0xffffffff; 547 } 548 #endif 549 550 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 551 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 552 sizeof(key->eth.dst)); 553 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 554 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 555 sizeof(key->eth.src)); 556 557 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 558 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 559 560 if (ethertype == htons(ETH_P_8021Q)) { 561 fl_set_key_vlan(tb, &key->vlan, &mask->vlan); 562 fl_set_key_val(tb, &key->basic.n_proto, 563 TCA_FLOWER_KEY_VLAN_ETH_TYPE, 564 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 565 sizeof(key->basic.n_proto)); 566 } else { 567 key->basic.n_proto = ethertype; 568 mask->basic.n_proto = cpu_to_be16(~0); 569 } 570 } 571 572 if (key->basic.n_proto == htons(ETH_P_IP) || 573 key->basic.n_proto == htons(ETH_P_IPV6)) { 574 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 575 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 576 sizeof(key->basic.ip_proto)); 577 fl_set_key_ip(tb, &key->ip, &mask->ip); 578 } 579 580 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 581 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 582 mask->control.addr_type = ~0; 583 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 584 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 585 sizeof(key->ipv4.src)); 586 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 587 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 588 sizeof(key->ipv4.dst)); 589 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 590 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 591 mask->control.addr_type = ~0; 592 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 593 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 594 sizeof(key->ipv6.src)); 595 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 596 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 597 sizeof(key->ipv6.dst)); 598 } 599 600 if (key->basic.ip_proto == IPPROTO_TCP) { 601 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 602 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 603 sizeof(key->tp.src)); 604 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 605 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 606 sizeof(key->tp.dst)); 607 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 608 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 609 sizeof(key->tcp.flags)); 610 } else if (key->basic.ip_proto == IPPROTO_UDP) { 611 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 612 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 613 sizeof(key->tp.src)); 614 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 615 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 616 sizeof(key->tp.dst)); 617 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 618 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 619 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 620 sizeof(key->tp.src)); 621 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 622 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 623 sizeof(key->tp.dst)); 624 } else if (key->basic.n_proto == htons(ETH_P_IP) && 625 key->basic.ip_proto == IPPROTO_ICMP) { 626 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 627 &mask->icmp.type, 628 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 629 sizeof(key->icmp.type)); 630 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 631 &mask->icmp.code, 632 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 633 sizeof(key->icmp.code)); 634 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 635 key->basic.ip_proto == IPPROTO_ICMPV6) { 636 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 637 &mask->icmp.type, 638 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 639 sizeof(key->icmp.type)); 640 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 641 &mask->icmp.code, 642 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 643 sizeof(key->icmp.code)); 644 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 645 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 646 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 647 if (ret) 648 return ret; 649 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 650 key->basic.n_proto == htons(ETH_P_RARP)) { 651 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 652 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 653 sizeof(key->arp.sip)); 654 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 655 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 656 sizeof(key->arp.tip)); 657 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 658 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 659 sizeof(key->arp.op)); 660 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 661 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 662 sizeof(key->arp.sha)); 663 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 664 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 665 sizeof(key->arp.tha)); 666 } 667 668 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 669 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 670 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 671 mask->enc_control.addr_type = ~0; 672 fl_set_key_val(tb, &key->enc_ipv4.src, 673 TCA_FLOWER_KEY_ENC_IPV4_SRC, 674 &mask->enc_ipv4.src, 675 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 676 sizeof(key->enc_ipv4.src)); 677 fl_set_key_val(tb, &key->enc_ipv4.dst, 678 TCA_FLOWER_KEY_ENC_IPV4_DST, 679 &mask->enc_ipv4.dst, 680 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 681 sizeof(key->enc_ipv4.dst)); 682 } 683 684 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 685 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 686 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 687 mask->enc_control.addr_type = ~0; 688 fl_set_key_val(tb, &key->enc_ipv6.src, 689 TCA_FLOWER_KEY_ENC_IPV6_SRC, 690 &mask->enc_ipv6.src, 691 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 692 sizeof(key->enc_ipv6.src)); 693 fl_set_key_val(tb, &key->enc_ipv6.dst, 694 TCA_FLOWER_KEY_ENC_IPV6_DST, 695 &mask->enc_ipv6.dst, 696 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 697 sizeof(key->enc_ipv6.dst)); 698 } 699 700 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 701 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 702 sizeof(key->enc_key_id.keyid)); 703 704 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 705 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 706 sizeof(key->enc_tp.src)); 707 708 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 709 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 710 sizeof(key->enc_tp.dst)); 711 712 if (tb[TCA_FLOWER_KEY_FLAGS]) 713 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 714 715 return ret; 716 } 717 718 static bool fl_mask_eq(struct fl_flow_mask *mask1, 719 struct fl_flow_mask *mask2) 720 { 721 const long *lmask1 = fl_key_get_start(&mask1->key, mask1); 722 const long *lmask2 = fl_key_get_start(&mask2->key, mask2); 723 724 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) && 725 !memcmp(lmask1, lmask2, fl_mask_range(mask1)); 726 } 727 728 static const struct rhashtable_params fl_ht_params = { 729 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 730 .head_offset = offsetof(struct cls_fl_filter, ht_node), 731 .automatic_shrinking = true, 732 }; 733 734 static int fl_init_hashtable(struct cls_fl_head *head, 735 struct fl_flow_mask *mask) 736 { 737 head->ht_params = fl_ht_params; 738 head->ht_params.key_len = fl_mask_range(mask); 739 head->ht_params.key_offset += mask->range.start; 740 741 return rhashtable_init(&head->ht, &head->ht_params); 742 } 743 744 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 745 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 746 747 #define FL_KEY_IS_MASKED(mask, member) \ 748 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 749 0, FL_KEY_MEMBER_SIZE(member)) \ 750 751 #define FL_KEY_SET(keys, cnt, id, member) \ 752 do { \ 753 keys[cnt].key_id = id; \ 754 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 755 cnt++; \ 756 } while(0); 757 758 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 759 do { \ 760 if (FL_KEY_IS_MASKED(mask, member)) \ 761 FL_KEY_SET(keys, cnt, id, member); \ 762 } while(0); 763 764 static void fl_init_dissector(struct cls_fl_head *head, 765 struct fl_flow_mask *mask) 766 { 767 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 768 size_t cnt = 0; 769 770 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 771 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 772 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 773 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 774 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 775 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 776 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 777 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 778 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 779 FLOW_DISSECTOR_KEY_PORTS, tp); 780 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 781 FLOW_DISSECTOR_KEY_IP, ip); 782 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 783 FLOW_DISSECTOR_KEY_TCP, tcp); 784 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 785 FLOW_DISSECTOR_KEY_ICMP, icmp); 786 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 787 FLOW_DISSECTOR_KEY_ARP, arp); 788 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 789 FLOW_DISSECTOR_KEY_MPLS, mpls); 790 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 791 FLOW_DISSECTOR_KEY_VLAN, vlan); 792 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 793 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 794 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 795 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 796 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 797 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 798 if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) || 799 FL_KEY_IS_MASKED(&mask->key, enc_ipv6)) 800 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 801 enc_control); 802 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt, 803 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 804 805 skb_flow_dissector_init(&head->dissector, keys, cnt); 806 } 807 808 static int fl_check_assign_mask(struct cls_fl_head *head, 809 struct fl_flow_mask *mask) 810 { 811 int err; 812 813 if (head->mask_assigned) { 814 if (!fl_mask_eq(&head->mask, mask)) 815 return -EINVAL; 816 else 817 return 0; 818 } 819 820 /* Mask is not assigned yet. So assign it and init hashtable 821 * according to that. 822 */ 823 err = fl_init_hashtable(head, mask); 824 if (err) 825 return err; 826 memcpy(&head->mask, mask, sizeof(head->mask)); 827 head->mask_assigned = true; 828 829 fl_init_dissector(head, mask); 830 831 return 0; 832 } 833 834 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 835 struct cls_fl_filter *f, struct fl_flow_mask *mask, 836 unsigned long base, struct nlattr **tb, 837 struct nlattr *est, bool ovr, 838 struct netlink_ext_ack *extack) 839 { 840 int err; 841 842 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack); 843 if (err < 0) 844 return err; 845 846 if (tb[TCA_FLOWER_CLASSID]) { 847 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 848 tcf_bind_filter(tp, &f->res, base); 849 } 850 851 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 852 if (err) 853 return err; 854 855 fl_mask_update_range(mask); 856 fl_set_masked_key(&f->mkey, &f->key, mask); 857 858 return 0; 859 } 860 861 static int fl_change(struct net *net, struct sk_buff *in_skb, 862 struct tcf_proto *tp, unsigned long base, 863 u32 handle, struct nlattr **tca, 864 void **arg, bool ovr, struct netlink_ext_ack *extack) 865 { 866 struct cls_fl_head *head = rtnl_dereference(tp->root); 867 struct cls_fl_filter *fold = *arg; 868 struct cls_fl_filter *fnew; 869 struct nlattr **tb; 870 struct fl_flow_mask mask = {}; 871 int err; 872 873 if (!tca[TCA_OPTIONS]) 874 return -EINVAL; 875 876 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 877 if (!tb) 878 return -ENOBUFS; 879 880 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 881 fl_policy, NULL); 882 if (err < 0) 883 goto errout_tb; 884 885 if (fold && handle && fold->handle != handle) { 886 err = -EINVAL; 887 goto errout_tb; 888 } 889 890 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 891 if (!fnew) { 892 err = -ENOBUFS; 893 goto errout_tb; 894 } 895 896 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 897 if (err < 0) 898 goto errout; 899 900 if (!handle) { 901 handle = 1; 902 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 903 INT_MAX, GFP_KERNEL); 904 } else if (!fold) { 905 /* user specifies a handle and it doesn't exist */ 906 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 907 handle, GFP_KERNEL); 908 } 909 if (err) 910 goto errout; 911 fnew->handle = handle; 912 913 if (tb[TCA_FLOWER_FLAGS]) { 914 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 915 916 if (!tc_flags_valid(fnew->flags)) { 917 err = -EINVAL; 918 goto errout_idr; 919 } 920 } 921 922 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr, 923 extack); 924 if (err) 925 goto errout_idr; 926 927 err = fl_check_assign_mask(head, &mask); 928 if (err) 929 goto errout_idr; 930 931 if (!tc_skip_sw(fnew->flags)) { 932 if (!fold && fl_lookup(head, &fnew->mkey)) { 933 err = -EEXIST; 934 goto errout_idr; 935 } 936 937 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node, 938 head->ht_params); 939 if (err) 940 goto errout_idr; 941 } 942 943 if (!tc_skip_hw(fnew->flags)) { 944 err = fl_hw_replace_filter(tp, 945 &head->dissector, 946 &mask.key, 947 fnew, 948 extack); 949 if (err) 950 goto errout_idr; 951 } 952 953 if (!tc_in_hw(fnew->flags)) 954 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 955 956 if (fold) { 957 if (!tc_skip_sw(fold->flags)) 958 rhashtable_remove_fast(&head->ht, &fold->ht_node, 959 head->ht_params); 960 if (!tc_skip_hw(fold->flags)) 961 fl_hw_destroy_filter(tp, fold, NULL); 962 } 963 964 *arg = fnew; 965 966 if (fold) { 967 idr_replace(&head->handle_idr, fnew, fnew->handle); 968 list_replace_rcu(&fold->list, &fnew->list); 969 tcf_unbind_filter(tp, &fold->res); 970 tcf_exts_get_net(&fold->exts); 971 call_rcu(&fold->rcu, fl_destroy_filter); 972 } else { 973 list_add_tail_rcu(&fnew->list, &head->filters); 974 } 975 976 kfree(tb); 977 return 0; 978 979 errout_idr: 980 if (fnew->handle) 981 idr_remove(&head->handle_idr, fnew->handle); 982 errout: 983 tcf_exts_destroy(&fnew->exts); 984 kfree(fnew); 985 errout_tb: 986 kfree(tb); 987 return err; 988 } 989 990 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 991 struct netlink_ext_ack *extack) 992 { 993 struct cls_fl_head *head = rtnl_dereference(tp->root); 994 struct cls_fl_filter *f = arg; 995 996 if (!tc_skip_sw(f->flags)) 997 rhashtable_remove_fast(&head->ht, &f->ht_node, 998 head->ht_params); 999 __fl_delete(tp, f, extack); 1000 *last = list_empty(&head->filters); 1001 return 0; 1002 } 1003 1004 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1005 { 1006 struct cls_fl_head *head = rtnl_dereference(tp->root); 1007 struct cls_fl_filter *f; 1008 1009 list_for_each_entry_rcu(f, &head->filters, list) { 1010 if (arg->count < arg->skip) 1011 goto skip; 1012 if (arg->fn(tp, f, arg) < 0) { 1013 arg->stop = 1; 1014 break; 1015 } 1016 skip: 1017 arg->count++; 1018 } 1019 } 1020 1021 static int fl_dump_key_val(struct sk_buff *skb, 1022 void *val, int val_type, 1023 void *mask, int mask_type, int len) 1024 { 1025 int err; 1026 1027 if (!memchr_inv(mask, 0, len)) 1028 return 0; 1029 err = nla_put(skb, val_type, len, val); 1030 if (err) 1031 return err; 1032 if (mask_type != TCA_FLOWER_UNSPEC) { 1033 err = nla_put(skb, mask_type, len, mask); 1034 if (err) 1035 return err; 1036 } 1037 return 0; 1038 } 1039 1040 static int fl_dump_key_mpls(struct sk_buff *skb, 1041 struct flow_dissector_key_mpls *mpls_key, 1042 struct flow_dissector_key_mpls *mpls_mask) 1043 { 1044 int err; 1045 1046 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1047 return 0; 1048 if (mpls_mask->mpls_ttl) { 1049 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1050 mpls_key->mpls_ttl); 1051 if (err) 1052 return err; 1053 } 1054 if (mpls_mask->mpls_tc) { 1055 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1056 mpls_key->mpls_tc); 1057 if (err) 1058 return err; 1059 } 1060 if (mpls_mask->mpls_label) { 1061 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1062 mpls_key->mpls_label); 1063 if (err) 1064 return err; 1065 } 1066 if (mpls_mask->mpls_bos) { 1067 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1068 mpls_key->mpls_bos); 1069 if (err) 1070 return err; 1071 } 1072 return 0; 1073 } 1074 1075 static int fl_dump_key_ip(struct sk_buff *skb, 1076 struct flow_dissector_key_ip *key, 1077 struct flow_dissector_key_ip *mask) 1078 { 1079 if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos, 1080 TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) || 1081 fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl, 1082 TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl))) 1083 return -1; 1084 1085 return 0; 1086 } 1087 1088 static int fl_dump_key_vlan(struct sk_buff *skb, 1089 struct flow_dissector_key_vlan *vlan_key, 1090 struct flow_dissector_key_vlan *vlan_mask) 1091 { 1092 int err; 1093 1094 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1095 return 0; 1096 if (vlan_mask->vlan_id) { 1097 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID, 1098 vlan_key->vlan_id); 1099 if (err) 1100 return err; 1101 } 1102 if (vlan_mask->vlan_priority) { 1103 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO, 1104 vlan_key->vlan_priority); 1105 if (err) 1106 return err; 1107 } 1108 return 0; 1109 } 1110 1111 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1112 u32 *flower_key, u32 *flower_mask, 1113 u32 flower_flag_bit, u32 dissector_flag_bit) 1114 { 1115 if (dissector_mask & dissector_flag_bit) { 1116 *flower_mask |= flower_flag_bit; 1117 if (dissector_key & dissector_flag_bit) 1118 *flower_key |= flower_flag_bit; 1119 } 1120 } 1121 1122 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1123 { 1124 u32 key, mask; 1125 __be32 _key, _mask; 1126 int err; 1127 1128 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1129 return 0; 1130 1131 key = 0; 1132 mask = 0; 1133 1134 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1135 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1136 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1137 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1138 FLOW_DIS_FIRST_FRAG); 1139 1140 _key = cpu_to_be32(key); 1141 _mask = cpu_to_be32(mask); 1142 1143 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1144 if (err) 1145 return err; 1146 1147 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1148 } 1149 1150 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1151 struct sk_buff *skb, struct tcmsg *t) 1152 { 1153 struct cls_fl_head *head = rtnl_dereference(tp->root); 1154 struct cls_fl_filter *f = fh; 1155 struct nlattr *nest; 1156 struct fl_flow_key *key, *mask; 1157 1158 if (!f) 1159 return skb->len; 1160 1161 t->tcm_handle = f->handle; 1162 1163 nest = nla_nest_start(skb, TCA_OPTIONS); 1164 if (!nest) 1165 goto nla_put_failure; 1166 1167 if (f->res.classid && 1168 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1169 goto nla_put_failure; 1170 1171 key = &f->key; 1172 mask = &head->mask.key; 1173 1174 if (mask->indev_ifindex) { 1175 struct net_device *dev; 1176 1177 dev = __dev_get_by_index(net, key->indev_ifindex); 1178 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1179 goto nla_put_failure; 1180 } 1181 1182 if (!tc_skip_hw(f->flags)) 1183 fl_hw_update_stats(tp, f); 1184 1185 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1186 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1187 sizeof(key->eth.dst)) || 1188 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1189 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1190 sizeof(key->eth.src)) || 1191 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1192 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1193 sizeof(key->basic.n_proto))) 1194 goto nla_put_failure; 1195 1196 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1197 goto nla_put_failure; 1198 1199 if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan)) 1200 goto nla_put_failure; 1201 1202 if ((key->basic.n_proto == htons(ETH_P_IP) || 1203 key->basic.n_proto == htons(ETH_P_IPV6)) && 1204 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1205 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1206 sizeof(key->basic.ip_proto)) || 1207 fl_dump_key_ip(skb, &key->ip, &mask->ip))) 1208 goto nla_put_failure; 1209 1210 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1211 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1212 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1213 sizeof(key->ipv4.src)) || 1214 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1215 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1216 sizeof(key->ipv4.dst)))) 1217 goto nla_put_failure; 1218 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1219 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1220 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1221 sizeof(key->ipv6.src)) || 1222 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1223 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1224 sizeof(key->ipv6.dst)))) 1225 goto nla_put_failure; 1226 1227 if (key->basic.ip_proto == IPPROTO_TCP && 1228 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1229 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1230 sizeof(key->tp.src)) || 1231 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1232 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1233 sizeof(key->tp.dst)) || 1234 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1235 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1236 sizeof(key->tcp.flags)))) 1237 goto nla_put_failure; 1238 else if (key->basic.ip_proto == IPPROTO_UDP && 1239 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1240 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1241 sizeof(key->tp.src)) || 1242 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1243 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1244 sizeof(key->tp.dst)))) 1245 goto nla_put_failure; 1246 else if (key->basic.ip_proto == IPPROTO_SCTP && 1247 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1248 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1249 sizeof(key->tp.src)) || 1250 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1251 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1252 sizeof(key->tp.dst)))) 1253 goto nla_put_failure; 1254 else if (key->basic.n_proto == htons(ETH_P_IP) && 1255 key->basic.ip_proto == IPPROTO_ICMP && 1256 (fl_dump_key_val(skb, &key->icmp.type, 1257 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1258 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1259 sizeof(key->icmp.type)) || 1260 fl_dump_key_val(skb, &key->icmp.code, 1261 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1262 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1263 sizeof(key->icmp.code)))) 1264 goto nla_put_failure; 1265 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1266 key->basic.ip_proto == IPPROTO_ICMPV6 && 1267 (fl_dump_key_val(skb, &key->icmp.type, 1268 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1269 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1270 sizeof(key->icmp.type)) || 1271 fl_dump_key_val(skb, &key->icmp.code, 1272 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1273 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1274 sizeof(key->icmp.code)))) 1275 goto nla_put_failure; 1276 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1277 key->basic.n_proto == htons(ETH_P_RARP)) && 1278 (fl_dump_key_val(skb, &key->arp.sip, 1279 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1280 TCA_FLOWER_KEY_ARP_SIP_MASK, 1281 sizeof(key->arp.sip)) || 1282 fl_dump_key_val(skb, &key->arp.tip, 1283 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1284 TCA_FLOWER_KEY_ARP_TIP_MASK, 1285 sizeof(key->arp.tip)) || 1286 fl_dump_key_val(skb, &key->arp.op, 1287 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1288 TCA_FLOWER_KEY_ARP_OP_MASK, 1289 sizeof(key->arp.op)) || 1290 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1291 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1292 sizeof(key->arp.sha)) || 1293 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1294 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1295 sizeof(key->arp.tha)))) 1296 goto nla_put_failure; 1297 1298 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1299 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1300 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1301 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1302 sizeof(key->enc_ipv4.src)) || 1303 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1304 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1305 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1306 sizeof(key->enc_ipv4.dst)))) 1307 goto nla_put_failure; 1308 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1309 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1310 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1311 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1312 sizeof(key->enc_ipv6.src)) || 1313 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1314 TCA_FLOWER_KEY_ENC_IPV6_DST, 1315 &mask->enc_ipv6.dst, 1316 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1317 sizeof(key->enc_ipv6.dst)))) 1318 goto nla_put_failure; 1319 1320 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1321 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1322 sizeof(key->enc_key_id)) || 1323 fl_dump_key_val(skb, &key->enc_tp.src, 1324 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1325 &mask->enc_tp.src, 1326 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1327 sizeof(key->enc_tp.src)) || 1328 fl_dump_key_val(skb, &key->enc_tp.dst, 1329 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1330 &mask->enc_tp.dst, 1331 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1332 sizeof(key->enc_tp.dst))) 1333 goto nla_put_failure; 1334 1335 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1336 goto nla_put_failure; 1337 1338 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1339 goto nla_put_failure; 1340 1341 if (tcf_exts_dump(skb, &f->exts)) 1342 goto nla_put_failure; 1343 1344 nla_nest_end(skb, nest); 1345 1346 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1347 goto nla_put_failure; 1348 1349 return skb->len; 1350 1351 nla_put_failure: 1352 nla_nest_cancel(skb, nest); 1353 return -1; 1354 } 1355 1356 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1357 { 1358 struct cls_fl_filter *f = fh; 1359 1360 if (f && f->res.classid == classid) 1361 f->res.class = cl; 1362 } 1363 1364 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1365 .kind = "flower", 1366 .classify = fl_classify, 1367 .init = fl_init, 1368 .destroy = fl_destroy, 1369 .get = fl_get, 1370 .change = fl_change, 1371 .delete = fl_delete, 1372 .walk = fl_walk, 1373 .dump = fl_dump, 1374 .bind_class = fl_bind_class, 1375 .owner = THIS_MODULE, 1376 }; 1377 1378 static int __init cls_fl_init(void) 1379 { 1380 return register_tcf_proto_ops(&cls_fl_ops); 1381 } 1382 1383 static void __exit cls_fl_exit(void) 1384 { 1385 unregister_tcf_proto_ops(&cls_fl_ops); 1386 } 1387 1388 module_init(cls_fl_init); 1389 module_exit(cls_fl_exit); 1390 1391 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1392 MODULE_DESCRIPTION("Flower classifier"); 1393 MODULE_LICENSE("GPL v2"); 1394