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 struct flow_dissector_key_vlan cvlan; 39 union { 40 struct flow_dissector_key_ipv4_addrs ipv4; 41 struct flow_dissector_key_ipv6_addrs ipv6; 42 }; 43 struct flow_dissector_key_ports tp; 44 struct flow_dissector_key_icmp icmp; 45 struct flow_dissector_key_arp arp; 46 struct flow_dissector_key_keyid enc_key_id; 47 union { 48 struct flow_dissector_key_ipv4_addrs enc_ipv4; 49 struct flow_dissector_key_ipv6_addrs enc_ipv6; 50 }; 51 struct flow_dissector_key_ports enc_tp; 52 struct flow_dissector_key_mpls mpls; 53 struct flow_dissector_key_tcp tcp; 54 struct flow_dissector_key_ip ip; 55 struct flow_dissector_key_ip enc_ip; 56 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 57 58 struct fl_flow_mask_range { 59 unsigned short int start; 60 unsigned short int end; 61 }; 62 63 struct fl_flow_mask { 64 struct fl_flow_key key; 65 struct fl_flow_mask_range range; 66 struct rhash_head ht_node; 67 struct rhashtable ht; 68 struct rhashtable_params filter_ht_params; 69 struct flow_dissector dissector; 70 struct list_head filters; 71 struct rcu_work rwork; 72 struct list_head list; 73 }; 74 75 struct fl_flow_tmplt { 76 struct fl_flow_key dummy_key; 77 struct fl_flow_key mask; 78 struct flow_dissector dissector; 79 struct tcf_chain *chain; 80 }; 81 82 struct cls_fl_head { 83 struct rhashtable ht; 84 struct list_head masks; 85 struct rcu_work rwork; 86 struct idr handle_idr; 87 }; 88 89 struct cls_fl_filter { 90 struct fl_flow_mask *mask; 91 struct rhash_head ht_node; 92 struct fl_flow_key mkey; 93 struct tcf_exts exts; 94 struct tcf_result res; 95 struct fl_flow_key key; 96 struct list_head list; 97 u32 handle; 98 u32 flags; 99 unsigned int in_hw_count; 100 struct rcu_work rwork; 101 struct net_device *hw_dev; 102 }; 103 104 static const struct rhashtable_params mask_ht_params = { 105 .key_offset = offsetof(struct fl_flow_mask, key), 106 .key_len = sizeof(struct fl_flow_key), 107 .head_offset = offsetof(struct fl_flow_mask, ht_node), 108 .automatic_shrinking = true, 109 }; 110 111 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 112 { 113 return mask->range.end - mask->range.start; 114 } 115 116 static void fl_mask_update_range(struct fl_flow_mask *mask) 117 { 118 const u8 *bytes = (const u8 *) &mask->key; 119 size_t size = sizeof(mask->key); 120 size_t i, first = 0, last; 121 122 for (i = 0; i < size; i++) { 123 if (bytes[i]) { 124 first = i; 125 break; 126 } 127 } 128 last = first; 129 for (i = size - 1; i != first; i--) { 130 if (bytes[i]) { 131 last = i; 132 break; 133 } 134 } 135 mask->range.start = rounddown(first, sizeof(long)); 136 mask->range.end = roundup(last + 1, sizeof(long)); 137 } 138 139 static void *fl_key_get_start(struct fl_flow_key *key, 140 const struct fl_flow_mask *mask) 141 { 142 return (u8 *) key + mask->range.start; 143 } 144 145 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 146 struct fl_flow_mask *mask) 147 { 148 const long *lkey = fl_key_get_start(key, mask); 149 const long *lmask = fl_key_get_start(&mask->key, mask); 150 long *lmkey = fl_key_get_start(mkey, mask); 151 int i; 152 153 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 154 *lmkey++ = *lkey++ & *lmask++; 155 } 156 157 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 158 struct fl_flow_mask *mask) 159 { 160 const long *lmask = fl_key_get_start(&mask->key, mask); 161 const long *ltmplt; 162 int i; 163 164 if (!tmplt) 165 return true; 166 ltmplt = fl_key_get_start(&tmplt->mask, mask); 167 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 168 if (~*ltmplt++ & *lmask++) 169 return false; 170 } 171 return true; 172 } 173 174 static void fl_clear_masked_range(struct fl_flow_key *key, 175 struct fl_flow_mask *mask) 176 { 177 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 178 } 179 180 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask, 181 struct fl_flow_key *mkey) 182 { 183 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 184 mask->filter_ht_params); 185 } 186 187 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 188 struct tcf_result *res) 189 { 190 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 191 struct cls_fl_filter *f; 192 struct fl_flow_mask *mask; 193 struct fl_flow_key skb_key; 194 struct fl_flow_key skb_mkey; 195 196 list_for_each_entry_rcu(mask, &head->masks, list) { 197 fl_clear_masked_range(&skb_key, mask); 198 199 skb_key.indev_ifindex = skb->skb_iif; 200 /* skb_flow_dissect() does not set n_proto in case an unknown 201 * protocol, so do it rather here. 202 */ 203 skb_key.basic.n_proto = skb->protocol; 204 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 205 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 206 207 fl_set_masked_key(&skb_mkey, &skb_key, mask); 208 209 f = fl_lookup(mask, &skb_mkey); 210 if (f && !tc_skip_sw(f->flags)) { 211 *res = f->res; 212 return tcf_exts_exec(skb, &f->exts, res); 213 } 214 } 215 return -1; 216 } 217 218 static int fl_init(struct tcf_proto *tp) 219 { 220 struct cls_fl_head *head; 221 222 head = kzalloc(sizeof(*head), GFP_KERNEL); 223 if (!head) 224 return -ENOBUFS; 225 226 INIT_LIST_HEAD_RCU(&head->masks); 227 rcu_assign_pointer(tp->root, head); 228 idr_init(&head->handle_idr); 229 230 return rhashtable_init(&head->ht, &mask_ht_params); 231 } 232 233 static void fl_mask_free(struct fl_flow_mask *mask) 234 { 235 rhashtable_destroy(&mask->ht); 236 kfree(mask); 237 } 238 239 static void fl_mask_free_work(struct work_struct *work) 240 { 241 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 242 struct fl_flow_mask, rwork); 243 244 fl_mask_free(mask); 245 } 246 247 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask, 248 bool async) 249 { 250 if (!list_empty(&mask->filters)) 251 return false; 252 253 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 254 list_del_rcu(&mask->list); 255 if (async) 256 tcf_queue_work(&mask->rwork, fl_mask_free_work); 257 else 258 fl_mask_free(mask); 259 260 return true; 261 } 262 263 static void __fl_destroy_filter(struct cls_fl_filter *f) 264 { 265 tcf_exts_destroy(&f->exts); 266 tcf_exts_put_net(&f->exts); 267 kfree(f); 268 } 269 270 static void fl_destroy_filter_work(struct work_struct *work) 271 { 272 struct cls_fl_filter *f = container_of(to_rcu_work(work), 273 struct cls_fl_filter, rwork); 274 275 rtnl_lock(); 276 __fl_destroy_filter(f); 277 rtnl_unlock(); 278 } 279 280 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 281 struct netlink_ext_ack *extack) 282 { 283 struct tc_cls_flower_offload cls_flower = {}; 284 struct tcf_block *block = tp->chain->block; 285 286 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 287 cls_flower.command = TC_CLSFLOWER_DESTROY; 288 cls_flower.cookie = (unsigned long) f; 289 290 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 291 &cls_flower, false); 292 tcf_block_offload_dec(block, &f->flags); 293 } 294 295 static int fl_hw_replace_filter(struct tcf_proto *tp, 296 struct cls_fl_filter *f, 297 struct netlink_ext_ack *extack) 298 { 299 struct tc_cls_flower_offload cls_flower = {}; 300 struct tcf_block *block = tp->chain->block; 301 bool skip_sw = tc_skip_sw(f->flags); 302 int err; 303 304 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 305 cls_flower.command = TC_CLSFLOWER_REPLACE; 306 cls_flower.cookie = (unsigned long) f; 307 cls_flower.dissector = &f->mask->dissector; 308 cls_flower.mask = &f->mask->key; 309 cls_flower.key = &f->mkey; 310 cls_flower.exts = &f->exts; 311 cls_flower.classid = f->res.classid; 312 313 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 314 &cls_flower, skip_sw); 315 if (err < 0) { 316 fl_hw_destroy_filter(tp, f, NULL); 317 return err; 318 } else if (err > 0) { 319 f->in_hw_count = err; 320 tcf_block_offload_inc(block, &f->flags); 321 } 322 323 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 324 return -EINVAL; 325 326 return 0; 327 } 328 329 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 330 { 331 struct tc_cls_flower_offload cls_flower = {}; 332 struct tcf_block *block = tp->chain->block; 333 334 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 335 cls_flower.command = TC_CLSFLOWER_STATS; 336 cls_flower.cookie = (unsigned long) f; 337 cls_flower.exts = &f->exts; 338 cls_flower.classid = f->res.classid; 339 340 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 341 &cls_flower, false); 342 } 343 344 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 345 struct netlink_ext_ack *extack) 346 { 347 struct cls_fl_head *head = rtnl_dereference(tp->root); 348 bool async = tcf_exts_get_net(&f->exts); 349 bool last; 350 351 idr_remove(&head->handle_idr, f->handle); 352 list_del_rcu(&f->list); 353 last = fl_mask_put(head, f->mask, async); 354 if (!tc_skip_hw(f->flags)) 355 fl_hw_destroy_filter(tp, f, extack); 356 tcf_unbind_filter(tp, &f->res); 357 if (async) 358 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 359 else 360 __fl_destroy_filter(f); 361 362 return last; 363 } 364 365 static void fl_destroy_sleepable(struct work_struct *work) 366 { 367 struct cls_fl_head *head = container_of(to_rcu_work(work), 368 struct cls_fl_head, 369 rwork); 370 371 rhashtable_destroy(&head->ht); 372 kfree(head); 373 module_put(THIS_MODULE); 374 } 375 376 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack) 377 { 378 struct cls_fl_head *head = rtnl_dereference(tp->root); 379 struct fl_flow_mask *mask, *next_mask; 380 struct cls_fl_filter *f, *next; 381 382 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 383 list_for_each_entry_safe(f, next, &mask->filters, list) { 384 if (__fl_delete(tp, f, extack)) 385 break; 386 } 387 } 388 idr_destroy(&head->handle_idr); 389 390 __module_get(THIS_MODULE); 391 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 392 } 393 394 static void *fl_get(struct tcf_proto *tp, u32 handle) 395 { 396 struct cls_fl_head *head = rtnl_dereference(tp->root); 397 398 return idr_find(&head->handle_idr, handle); 399 } 400 401 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 402 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 403 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 404 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 405 .len = IFNAMSIZ }, 406 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 407 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 408 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 409 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 410 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 411 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 412 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 413 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 414 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 415 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 416 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 417 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 418 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 419 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 420 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 421 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 422 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 423 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 424 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 425 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 426 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 427 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 428 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 429 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 430 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 431 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 432 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 433 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 434 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 435 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 436 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 437 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 438 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 439 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 440 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 441 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 442 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 443 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 444 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 445 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 446 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 447 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 448 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 449 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 450 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 451 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 452 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 453 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 454 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 455 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 456 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 457 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 458 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 459 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 460 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 461 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 462 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 463 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 464 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 465 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 466 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 467 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 468 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 469 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 470 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 471 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 472 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 473 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 474 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 475 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 476 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 477 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 478 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 479 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 480 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 481 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 482 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 483 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 484 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 485 }; 486 487 static void fl_set_key_val(struct nlattr **tb, 488 void *val, int val_type, 489 void *mask, int mask_type, int len) 490 { 491 if (!tb[val_type]) 492 return; 493 memcpy(val, nla_data(tb[val_type]), len); 494 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 495 memset(mask, 0xff, len); 496 else 497 memcpy(mask, nla_data(tb[mask_type]), len); 498 } 499 500 static int fl_set_key_mpls(struct nlattr **tb, 501 struct flow_dissector_key_mpls *key_val, 502 struct flow_dissector_key_mpls *key_mask) 503 { 504 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 505 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 506 key_mask->mpls_ttl = MPLS_TTL_MASK; 507 } 508 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 509 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 510 511 if (bos & ~MPLS_BOS_MASK) 512 return -EINVAL; 513 key_val->mpls_bos = bos; 514 key_mask->mpls_bos = MPLS_BOS_MASK; 515 } 516 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 517 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 518 519 if (tc & ~MPLS_TC_MASK) 520 return -EINVAL; 521 key_val->mpls_tc = tc; 522 key_mask->mpls_tc = MPLS_TC_MASK; 523 } 524 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 525 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 526 527 if (label & ~MPLS_LABEL_MASK) 528 return -EINVAL; 529 key_val->mpls_label = label; 530 key_mask->mpls_label = MPLS_LABEL_MASK; 531 } 532 return 0; 533 } 534 535 static void fl_set_key_vlan(struct nlattr **tb, 536 __be16 ethertype, 537 int vlan_id_key, int vlan_prio_key, 538 struct flow_dissector_key_vlan *key_val, 539 struct flow_dissector_key_vlan *key_mask) 540 { 541 #define VLAN_PRIORITY_MASK 0x7 542 543 if (tb[vlan_id_key]) { 544 key_val->vlan_id = 545 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 546 key_mask->vlan_id = VLAN_VID_MASK; 547 } 548 if (tb[vlan_prio_key]) { 549 key_val->vlan_priority = 550 nla_get_u8(tb[vlan_prio_key]) & 551 VLAN_PRIORITY_MASK; 552 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 553 } 554 key_val->vlan_tpid = ethertype; 555 key_mask->vlan_tpid = cpu_to_be16(~0); 556 } 557 558 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 559 u32 *dissector_key, u32 *dissector_mask, 560 u32 flower_flag_bit, u32 dissector_flag_bit) 561 { 562 if (flower_mask & flower_flag_bit) { 563 *dissector_mask |= dissector_flag_bit; 564 if (flower_key & flower_flag_bit) 565 *dissector_key |= dissector_flag_bit; 566 } 567 } 568 569 static int fl_set_key_flags(struct nlattr **tb, 570 u32 *flags_key, u32 *flags_mask) 571 { 572 u32 key, mask; 573 574 /* mask is mandatory for flags */ 575 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 576 return -EINVAL; 577 578 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 579 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 580 581 *flags_key = 0; 582 *flags_mask = 0; 583 584 fl_set_key_flag(key, mask, flags_key, flags_mask, 585 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 586 fl_set_key_flag(key, mask, flags_key, flags_mask, 587 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 588 FLOW_DIS_FIRST_FRAG); 589 590 return 0; 591 } 592 593 static void fl_set_key_ip(struct nlattr **tb, bool encap, 594 struct flow_dissector_key_ip *key, 595 struct flow_dissector_key_ip *mask) 596 { 597 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 598 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 599 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 600 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 601 602 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 603 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 604 } 605 606 static int fl_set_key(struct net *net, struct nlattr **tb, 607 struct fl_flow_key *key, struct fl_flow_key *mask, 608 struct netlink_ext_ack *extack) 609 { 610 __be16 ethertype; 611 int ret = 0; 612 #ifdef CONFIG_NET_CLS_IND 613 if (tb[TCA_FLOWER_INDEV]) { 614 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 615 if (err < 0) 616 return err; 617 key->indev_ifindex = err; 618 mask->indev_ifindex = 0xffffffff; 619 } 620 #endif 621 622 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 623 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 624 sizeof(key->eth.dst)); 625 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 626 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 627 sizeof(key->eth.src)); 628 629 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 630 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 631 632 if (eth_type_vlan(ethertype)) { 633 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 634 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 635 &mask->vlan); 636 637 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 638 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 639 if (eth_type_vlan(ethertype)) { 640 fl_set_key_vlan(tb, ethertype, 641 TCA_FLOWER_KEY_CVLAN_ID, 642 TCA_FLOWER_KEY_CVLAN_PRIO, 643 &key->cvlan, &mask->cvlan); 644 fl_set_key_val(tb, &key->basic.n_proto, 645 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 646 &mask->basic.n_proto, 647 TCA_FLOWER_UNSPEC, 648 sizeof(key->basic.n_proto)); 649 } else { 650 key->basic.n_proto = ethertype; 651 mask->basic.n_proto = cpu_to_be16(~0); 652 } 653 } 654 } else { 655 key->basic.n_proto = ethertype; 656 mask->basic.n_proto = cpu_to_be16(~0); 657 } 658 } 659 660 if (key->basic.n_proto == htons(ETH_P_IP) || 661 key->basic.n_proto == htons(ETH_P_IPV6)) { 662 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 663 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 664 sizeof(key->basic.ip_proto)); 665 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 666 } 667 668 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 669 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 670 mask->control.addr_type = ~0; 671 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 672 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 673 sizeof(key->ipv4.src)); 674 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 675 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 676 sizeof(key->ipv4.dst)); 677 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 678 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 679 mask->control.addr_type = ~0; 680 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 681 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 682 sizeof(key->ipv6.src)); 683 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 684 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 685 sizeof(key->ipv6.dst)); 686 } 687 688 if (key->basic.ip_proto == IPPROTO_TCP) { 689 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 690 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 691 sizeof(key->tp.src)); 692 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 693 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 694 sizeof(key->tp.dst)); 695 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 696 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 697 sizeof(key->tcp.flags)); 698 } else if (key->basic.ip_proto == IPPROTO_UDP) { 699 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 700 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 701 sizeof(key->tp.src)); 702 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 703 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 704 sizeof(key->tp.dst)); 705 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 706 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 707 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 708 sizeof(key->tp.src)); 709 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 710 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 711 sizeof(key->tp.dst)); 712 } else if (key->basic.n_proto == htons(ETH_P_IP) && 713 key->basic.ip_proto == IPPROTO_ICMP) { 714 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 715 &mask->icmp.type, 716 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 717 sizeof(key->icmp.type)); 718 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 719 &mask->icmp.code, 720 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 721 sizeof(key->icmp.code)); 722 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 723 key->basic.ip_proto == IPPROTO_ICMPV6) { 724 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 725 &mask->icmp.type, 726 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 727 sizeof(key->icmp.type)); 728 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 729 &mask->icmp.code, 730 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 731 sizeof(key->icmp.code)); 732 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 733 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 734 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 735 if (ret) 736 return ret; 737 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 738 key->basic.n_proto == htons(ETH_P_RARP)) { 739 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 740 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 741 sizeof(key->arp.sip)); 742 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 743 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 744 sizeof(key->arp.tip)); 745 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 746 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 747 sizeof(key->arp.op)); 748 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 749 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 750 sizeof(key->arp.sha)); 751 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 752 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 753 sizeof(key->arp.tha)); 754 } 755 756 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 757 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 758 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 759 mask->enc_control.addr_type = ~0; 760 fl_set_key_val(tb, &key->enc_ipv4.src, 761 TCA_FLOWER_KEY_ENC_IPV4_SRC, 762 &mask->enc_ipv4.src, 763 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 764 sizeof(key->enc_ipv4.src)); 765 fl_set_key_val(tb, &key->enc_ipv4.dst, 766 TCA_FLOWER_KEY_ENC_IPV4_DST, 767 &mask->enc_ipv4.dst, 768 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 769 sizeof(key->enc_ipv4.dst)); 770 } 771 772 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 773 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 774 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 775 mask->enc_control.addr_type = ~0; 776 fl_set_key_val(tb, &key->enc_ipv6.src, 777 TCA_FLOWER_KEY_ENC_IPV6_SRC, 778 &mask->enc_ipv6.src, 779 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 780 sizeof(key->enc_ipv6.src)); 781 fl_set_key_val(tb, &key->enc_ipv6.dst, 782 TCA_FLOWER_KEY_ENC_IPV6_DST, 783 &mask->enc_ipv6.dst, 784 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 785 sizeof(key->enc_ipv6.dst)); 786 } 787 788 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 789 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 790 sizeof(key->enc_key_id.keyid)); 791 792 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 793 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 794 sizeof(key->enc_tp.src)); 795 796 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 797 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 798 sizeof(key->enc_tp.dst)); 799 800 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 801 802 if (tb[TCA_FLOWER_KEY_FLAGS]) 803 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 804 805 return ret; 806 } 807 808 static void fl_mask_copy(struct fl_flow_mask *dst, 809 struct fl_flow_mask *src) 810 { 811 const void *psrc = fl_key_get_start(&src->key, src); 812 void *pdst = fl_key_get_start(&dst->key, src); 813 814 memcpy(pdst, psrc, fl_mask_range(src)); 815 dst->range = src->range; 816 } 817 818 static const struct rhashtable_params fl_ht_params = { 819 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 820 .head_offset = offsetof(struct cls_fl_filter, ht_node), 821 .automatic_shrinking = true, 822 }; 823 824 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 825 { 826 mask->filter_ht_params = fl_ht_params; 827 mask->filter_ht_params.key_len = fl_mask_range(mask); 828 mask->filter_ht_params.key_offset += mask->range.start; 829 830 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 831 } 832 833 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 834 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member)) 835 836 #define FL_KEY_IS_MASKED(mask, member) \ 837 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 838 0, FL_KEY_MEMBER_SIZE(member)) \ 839 840 #define FL_KEY_SET(keys, cnt, id, member) \ 841 do { \ 842 keys[cnt].key_id = id; \ 843 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 844 cnt++; \ 845 } while(0); 846 847 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 848 do { \ 849 if (FL_KEY_IS_MASKED(mask, member)) \ 850 FL_KEY_SET(keys, cnt, id, member); \ 851 } while(0); 852 853 static void fl_init_dissector(struct flow_dissector *dissector, 854 struct fl_flow_key *mask) 855 { 856 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 857 size_t cnt = 0; 858 859 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 860 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 861 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 862 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 863 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 864 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 865 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 866 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 867 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 868 FLOW_DISSECTOR_KEY_PORTS, tp); 869 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 870 FLOW_DISSECTOR_KEY_IP, ip); 871 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 872 FLOW_DISSECTOR_KEY_TCP, tcp); 873 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 874 FLOW_DISSECTOR_KEY_ICMP, icmp); 875 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 876 FLOW_DISSECTOR_KEY_ARP, arp); 877 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 878 FLOW_DISSECTOR_KEY_MPLS, mpls); 879 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 880 FLOW_DISSECTOR_KEY_VLAN, vlan); 881 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 882 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 883 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 884 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 885 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 886 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 887 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 888 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 889 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 890 FL_KEY_IS_MASKED(mask, enc_ipv6)) 891 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 892 enc_control); 893 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 894 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 895 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 896 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 897 898 skb_flow_dissector_init(dissector, keys, cnt); 899 } 900 901 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 902 struct fl_flow_mask *mask) 903 { 904 struct fl_flow_mask *newmask; 905 int err; 906 907 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 908 if (!newmask) 909 return ERR_PTR(-ENOMEM); 910 911 fl_mask_copy(newmask, mask); 912 913 err = fl_init_mask_hashtable(newmask); 914 if (err) 915 goto errout_free; 916 917 fl_init_dissector(&newmask->dissector, &newmask->key); 918 919 INIT_LIST_HEAD_RCU(&newmask->filters); 920 921 err = rhashtable_insert_fast(&head->ht, &newmask->ht_node, 922 mask_ht_params); 923 if (err) 924 goto errout_destroy; 925 926 list_add_tail_rcu(&newmask->list, &head->masks); 927 928 return newmask; 929 930 errout_destroy: 931 rhashtable_destroy(&newmask->ht); 932 errout_free: 933 kfree(newmask); 934 935 return ERR_PTR(err); 936 } 937 938 static int fl_check_assign_mask(struct cls_fl_head *head, 939 struct cls_fl_filter *fnew, 940 struct cls_fl_filter *fold, 941 struct fl_flow_mask *mask) 942 { 943 struct fl_flow_mask *newmask; 944 945 fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params); 946 if (!fnew->mask) { 947 if (fold) 948 return -EINVAL; 949 950 newmask = fl_create_new_mask(head, mask); 951 if (IS_ERR(newmask)) 952 return PTR_ERR(newmask); 953 954 fnew->mask = newmask; 955 } else if (fold && fold->mask != fnew->mask) { 956 return -EINVAL; 957 } 958 959 return 0; 960 } 961 962 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 963 struct cls_fl_filter *f, struct fl_flow_mask *mask, 964 unsigned long base, struct nlattr **tb, 965 struct nlattr *est, bool ovr, 966 struct fl_flow_tmplt *tmplt, 967 struct netlink_ext_ack *extack) 968 { 969 int err; 970 971 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack); 972 if (err < 0) 973 return err; 974 975 if (tb[TCA_FLOWER_CLASSID]) { 976 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 977 tcf_bind_filter(tp, &f->res, base); 978 } 979 980 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 981 if (err) 982 return err; 983 984 fl_mask_update_range(mask); 985 fl_set_masked_key(&f->mkey, &f->key, mask); 986 987 if (!fl_mask_fits_tmplt(tmplt, mask)) { 988 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 989 return -EINVAL; 990 } 991 992 return 0; 993 } 994 995 static int fl_change(struct net *net, struct sk_buff *in_skb, 996 struct tcf_proto *tp, unsigned long base, 997 u32 handle, struct nlattr **tca, 998 void **arg, bool ovr, struct netlink_ext_ack *extack) 999 { 1000 struct cls_fl_head *head = rtnl_dereference(tp->root); 1001 struct cls_fl_filter *fold = *arg; 1002 struct cls_fl_filter *fnew; 1003 struct nlattr **tb; 1004 struct fl_flow_mask mask = {}; 1005 int err; 1006 1007 if (!tca[TCA_OPTIONS]) 1008 return -EINVAL; 1009 1010 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1011 if (!tb) 1012 return -ENOBUFS; 1013 1014 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1015 fl_policy, NULL); 1016 if (err < 0) 1017 goto errout_tb; 1018 1019 if (fold && handle && fold->handle != handle) { 1020 err = -EINVAL; 1021 goto errout_tb; 1022 } 1023 1024 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1025 if (!fnew) { 1026 err = -ENOBUFS; 1027 goto errout_tb; 1028 } 1029 1030 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 1031 if (err < 0) 1032 goto errout; 1033 1034 if (!handle) { 1035 handle = 1; 1036 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1037 INT_MAX, GFP_KERNEL); 1038 } else if (!fold) { 1039 /* user specifies a handle and it doesn't exist */ 1040 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1041 handle, GFP_KERNEL); 1042 } 1043 if (err) 1044 goto errout; 1045 fnew->handle = handle; 1046 1047 if (tb[TCA_FLOWER_FLAGS]) { 1048 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1049 1050 if (!tc_flags_valid(fnew->flags)) { 1051 err = -EINVAL; 1052 goto errout_idr; 1053 } 1054 } 1055 1056 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr, 1057 tp->chain->tmplt_priv, extack); 1058 if (err) 1059 goto errout_idr; 1060 1061 err = fl_check_assign_mask(head, fnew, fold, &mask); 1062 if (err) 1063 goto errout_idr; 1064 1065 if (!tc_skip_sw(fnew->flags)) { 1066 if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) { 1067 err = -EEXIST; 1068 goto errout_mask; 1069 } 1070 1071 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node, 1072 fnew->mask->filter_ht_params); 1073 if (err) 1074 goto errout_mask; 1075 } 1076 1077 if (!tc_skip_hw(fnew->flags)) { 1078 err = fl_hw_replace_filter(tp, fnew, extack); 1079 if (err) 1080 goto errout_mask; 1081 } 1082 1083 if (!tc_in_hw(fnew->flags)) 1084 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1085 1086 if (fold) { 1087 if (!tc_skip_sw(fold->flags)) 1088 rhashtable_remove_fast(&fold->mask->ht, 1089 &fold->ht_node, 1090 fold->mask->filter_ht_params); 1091 if (!tc_skip_hw(fold->flags)) 1092 fl_hw_destroy_filter(tp, fold, NULL); 1093 } 1094 1095 *arg = fnew; 1096 1097 if (fold) { 1098 idr_replace(&head->handle_idr, fnew, fnew->handle); 1099 list_replace_rcu(&fold->list, &fnew->list); 1100 tcf_unbind_filter(tp, &fold->res); 1101 tcf_exts_get_net(&fold->exts); 1102 tcf_queue_work(&fold->rwork, fl_destroy_filter_work); 1103 } else { 1104 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1105 } 1106 1107 kfree(tb); 1108 return 0; 1109 1110 errout_mask: 1111 fl_mask_put(head, fnew->mask, false); 1112 1113 errout_idr: 1114 if (!fold) 1115 idr_remove(&head->handle_idr, fnew->handle); 1116 errout: 1117 tcf_exts_destroy(&fnew->exts); 1118 kfree(fnew); 1119 errout_tb: 1120 kfree(tb); 1121 return err; 1122 } 1123 1124 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1125 struct netlink_ext_ack *extack) 1126 { 1127 struct cls_fl_head *head = rtnl_dereference(tp->root); 1128 struct cls_fl_filter *f = arg; 1129 1130 if (!tc_skip_sw(f->flags)) 1131 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 1132 f->mask->filter_ht_params); 1133 __fl_delete(tp, f, extack); 1134 *last = list_empty(&head->masks); 1135 return 0; 1136 } 1137 1138 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1139 { 1140 struct cls_fl_head *head = rtnl_dereference(tp->root); 1141 struct cls_fl_filter *f; 1142 1143 arg->count = arg->skip; 1144 1145 while ((f = idr_get_next_ul(&head->handle_idr, 1146 &arg->cookie)) != NULL) { 1147 if (arg->fn(tp, f, arg) < 0) { 1148 arg->stop = 1; 1149 break; 1150 } 1151 arg->cookie = f->handle + 1; 1152 arg->count++; 1153 } 1154 } 1155 1156 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1157 void *cb_priv, struct netlink_ext_ack *extack) 1158 { 1159 struct cls_fl_head *head = rtnl_dereference(tp->root); 1160 struct tc_cls_flower_offload cls_flower = {}; 1161 struct tcf_block *block = tp->chain->block; 1162 struct fl_flow_mask *mask; 1163 struct cls_fl_filter *f; 1164 int err; 1165 1166 list_for_each_entry(mask, &head->masks, list) { 1167 list_for_each_entry(f, &mask->filters, list) { 1168 if (tc_skip_hw(f->flags)) 1169 continue; 1170 1171 tc_cls_common_offload_init(&cls_flower.common, tp, 1172 f->flags, extack); 1173 cls_flower.command = add ? 1174 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1175 cls_flower.cookie = (unsigned long)f; 1176 cls_flower.dissector = &mask->dissector; 1177 cls_flower.mask = &f->mkey; 1178 cls_flower.key = &f->key; 1179 cls_flower.exts = &f->exts; 1180 cls_flower.classid = f->res.classid; 1181 1182 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1183 if (err) { 1184 if (add && tc_skip_sw(f->flags)) 1185 return err; 1186 continue; 1187 } 1188 1189 tc_cls_offload_cnt_update(block, &f->in_hw_count, 1190 &f->flags, add); 1191 } 1192 } 1193 1194 return 0; 1195 } 1196 1197 static void fl_hw_create_tmplt(struct tcf_chain *chain, 1198 struct fl_flow_tmplt *tmplt) 1199 { 1200 struct tc_cls_flower_offload cls_flower = {}; 1201 struct tcf_block *block = chain->block; 1202 struct tcf_exts dummy_exts = { 0, }; 1203 1204 cls_flower.common.chain_index = chain->index; 1205 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1206 cls_flower.cookie = (unsigned long) tmplt; 1207 cls_flower.dissector = &tmplt->dissector; 1208 cls_flower.mask = &tmplt->mask; 1209 cls_flower.key = &tmplt->dummy_key; 1210 cls_flower.exts = &dummy_exts; 1211 1212 /* We don't care if driver (any of them) fails to handle this 1213 * call. It serves just as a hint for it. 1214 */ 1215 tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, 1216 &cls_flower, false); 1217 } 1218 1219 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1220 struct fl_flow_tmplt *tmplt) 1221 { 1222 struct tc_cls_flower_offload cls_flower = {}; 1223 struct tcf_block *block = chain->block; 1224 1225 cls_flower.common.chain_index = chain->index; 1226 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1227 cls_flower.cookie = (unsigned long) tmplt; 1228 1229 tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, 1230 &cls_flower, false); 1231 } 1232 1233 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1234 struct nlattr **tca, 1235 struct netlink_ext_ack *extack) 1236 { 1237 struct fl_flow_tmplt *tmplt; 1238 struct nlattr **tb; 1239 int err; 1240 1241 if (!tca[TCA_OPTIONS]) 1242 return ERR_PTR(-EINVAL); 1243 1244 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1245 if (!tb) 1246 return ERR_PTR(-ENOBUFS); 1247 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1248 fl_policy, NULL); 1249 if (err) 1250 goto errout_tb; 1251 1252 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1253 if (!tmplt) 1254 goto errout_tb; 1255 tmplt->chain = chain; 1256 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1257 if (err) 1258 goto errout_tmplt; 1259 kfree(tb); 1260 1261 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1262 1263 fl_hw_create_tmplt(chain, tmplt); 1264 1265 return tmplt; 1266 1267 errout_tmplt: 1268 kfree(tmplt); 1269 errout_tb: 1270 kfree(tb); 1271 return ERR_PTR(err); 1272 } 1273 1274 static void fl_tmplt_destroy(void *tmplt_priv) 1275 { 1276 struct fl_flow_tmplt *tmplt = tmplt_priv; 1277 1278 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1279 kfree(tmplt); 1280 } 1281 1282 static int fl_dump_key_val(struct sk_buff *skb, 1283 void *val, int val_type, 1284 void *mask, int mask_type, int len) 1285 { 1286 int err; 1287 1288 if (!memchr_inv(mask, 0, len)) 1289 return 0; 1290 err = nla_put(skb, val_type, len, val); 1291 if (err) 1292 return err; 1293 if (mask_type != TCA_FLOWER_UNSPEC) { 1294 err = nla_put(skb, mask_type, len, mask); 1295 if (err) 1296 return err; 1297 } 1298 return 0; 1299 } 1300 1301 static int fl_dump_key_mpls(struct sk_buff *skb, 1302 struct flow_dissector_key_mpls *mpls_key, 1303 struct flow_dissector_key_mpls *mpls_mask) 1304 { 1305 int err; 1306 1307 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1308 return 0; 1309 if (mpls_mask->mpls_ttl) { 1310 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1311 mpls_key->mpls_ttl); 1312 if (err) 1313 return err; 1314 } 1315 if (mpls_mask->mpls_tc) { 1316 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1317 mpls_key->mpls_tc); 1318 if (err) 1319 return err; 1320 } 1321 if (mpls_mask->mpls_label) { 1322 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1323 mpls_key->mpls_label); 1324 if (err) 1325 return err; 1326 } 1327 if (mpls_mask->mpls_bos) { 1328 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1329 mpls_key->mpls_bos); 1330 if (err) 1331 return err; 1332 } 1333 return 0; 1334 } 1335 1336 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1337 struct flow_dissector_key_ip *key, 1338 struct flow_dissector_key_ip *mask) 1339 { 1340 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1341 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1342 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1343 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1344 1345 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1346 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1347 return -1; 1348 1349 return 0; 1350 } 1351 1352 static int fl_dump_key_vlan(struct sk_buff *skb, 1353 int vlan_id_key, int vlan_prio_key, 1354 struct flow_dissector_key_vlan *vlan_key, 1355 struct flow_dissector_key_vlan *vlan_mask) 1356 { 1357 int err; 1358 1359 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1360 return 0; 1361 if (vlan_mask->vlan_id) { 1362 err = nla_put_u16(skb, vlan_id_key, 1363 vlan_key->vlan_id); 1364 if (err) 1365 return err; 1366 } 1367 if (vlan_mask->vlan_priority) { 1368 err = nla_put_u8(skb, vlan_prio_key, 1369 vlan_key->vlan_priority); 1370 if (err) 1371 return err; 1372 } 1373 return 0; 1374 } 1375 1376 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1377 u32 *flower_key, u32 *flower_mask, 1378 u32 flower_flag_bit, u32 dissector_flag_bit) 1379 { 1380 if (dissector_mask & dissector_flag_bit) { 1381 *flower_mask |= flower_flag_bit; 1382 if (dissector_key & dissector_flag_bit) 1383 *flower_key |= flower_flag_bit; 1384 } 1385 } 1386 1387 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1388 { 1389 u32 key, mask; 1390 __be32 _key, _mask; 1391 int err; 1392 1393 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1394 return 0; 1395 1396 key = 0; 1397 mask = 0; 1398 1399 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1400 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1401 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1402 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1403 FLOW_DIS_FIRST_FRAG); 1404 1405 _key = cpu_to_be32(key); 1406 _mask = cpu_to_be32(mask); 1407 1408 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1409 if (err) 1410 return err; 1411 1412 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1413 } 1414 1415 static int fl_dump_key(struct sk_buff *skb, struct net *net, 1416 struct fl_flow_key *key, struct fl_flow_key *mask) 1417 { 1418 if (mask->indev_ifindex) { 1419 struct net_device *dev; 1420 1421 dev = __dev_get_by_index(net, key->indev_ifindex); 1422 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1423 goto nla_put_failure; 1424 } 1425 1426 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1427 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1428 sizeof(key->eth.dst)) || 1429 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1430 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1431 sizeof(key->eth.src)) || 1432 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1433 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1434 sizeof(key->basic.n_proto))) 1435 goto nla_put_failure; 1436 1437 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1438 goto nla_put_failure; 1439 1440 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 1441 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 1442 goto nla_put_failure; 1443 1444 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 1445 TCA_FLOWER_KEY_CVLAN_PRIO, 1446 &key->cvlan, &mask->cvlan) || 1447 (mask->cvlan.vlan_tpid && 1448 nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1449 key->cvlan.vlan_tpid))) 1450 goto nla_put_failure; 1451 1452 if (mask->basic.n_proto) { 1453 if (mask->cvlan.vlan_tpid) { 1454 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1455 key->basic.n_proto)) 1456 goto nla_put_failure; 1457 } else if (mask->vlan.vlan_tpid) { 1458 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1459 key->basic.n_proto)) 1460 goto nla_put_failure; 1461 } 1462 } 1463 1464 if ((key->basic.n_proto == htons(ETH_P_IP) || 1465 key->basic.n_proto == htons(ETH_P_IPV6)) && 1466 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1467 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1468 sizeof(key->basic.ip_proto)) || 1469 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 1470 goto nla_put_failure; 1471 1472 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1473 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1474 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1475 sizeof(key->ipv4.src)) || 1476 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1477 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1478 sizeof(key->ipv4.dst)))) 1479 goto nla_put_failure; 1480 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1481 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1482 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1483 sizeof(key->ipv6.src)) || 1484 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1485 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1486 sizeof(key->ipv6.dst)))) 1487 goto nla_put_failure; 1488 1489 if (key->basic.ip_proto == IPPROTO_TCP && 1490 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1491 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1492 sizeof(key->tp.src)) || 1493 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1494 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1495 sizeof(key->tp.dst)) || 1496 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1497 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1498 sizeof(key->tcp.flags)))) 1499 goto nla_put_failure; 1500 else if (key->basic.ip_proto == IPPROTO_UDP && 1501 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1502 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1503 sizeof(key->tp.src)) || 1504 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1505 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1506 sizeof(key->tp.dst)))) 1507 goto nla_put_failure; 1508 else if (key->basic.ip_proto == IPPROTO_SCTP && 1509 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1510 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1511 sizeof(key->tp.src)) || 1512 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1513 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1514 sizeof(key->tp.dst)))) 1515 goto nla_put_failure; 1516 else if (key->basic.n_proto == htons(ETH_P_IP) && 1517 key->basic.ip_proto == IPPROTO_ICMP && 1518 (fl_dump_key_val(skb, &key->icmp.type, 1519 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1520 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1521 sizeof(key->icmp.type)) || 1522 fl_dump_key_val(skb, &key->icmp.code, 1523 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1524 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1525 sizeof(key->icmp.code)))) 1526 goto nla_put_failure; 1527 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1528 key->basic.ip_proto == IPPROTO_ICMPV6 && 1529 (fl_dump_key_val(skb, &key->icmp.type, 1530 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1531 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1532 sizeof(key->icmp.type)) || 1533 fl_dump_key_val(skb, &key->icmp.code, 1534 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1535 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1536 sizeof(key->icmp.code)))) 1537 goto nla_put_failure; 1538 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1539 key->basic.n_proto == htons(ETH_P_RARP)) && 1540 (fl_dump_key_val(skb, &key->arp.sip, 1541 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1542 TCA_FLOWER_KEY_ARP_SIP_MASK, 1543 sizeof(key->arp.sip)) || 1544 fl_dump_key_val(skb, &key->arp.tip, 1545 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1546 TCA_FLOWER_KEY_ARP_TIP_MASK, 1547 sizeof(key->arp.tip)) || 1548 fl_dump_key_val(skb, &key->arp.op, 1549 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1550 TCA_FLOWER_KEY_ARP_OP_MASK, 1551 sizeof(key->arp.op)) || 1552 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1553 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1554 sizeof(key->arp.sha)) || 1555 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1556 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1557 sizeof(key->arp.tha)))) 1558 goto nla_put_failure; 1559 1560 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1561 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1562 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1563 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1564 sizeof(key->enc_ipv4.src)) || 1565 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1566 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1567 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1568 sizeof(key->enc_ipv4.dst)))) 1569 goto nla_put_failure; 1570 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1571 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1572 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1573 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1574 sizeof(key->enc_ipv6.src)) || 1575 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1576 TCA_FLOWER_KEY_ENC_IPV6_DST, 1577 &mask->enc_ipv6.dst, 1578 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1579 sizeof(key->enc_ipv6.dst)))) 1580 goto nla_put_failure; 1581 1582 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1583 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1584 sizeof(key->enc_key_id)) || 1585 fl_dump_key_val(skb, &key->enc_tp.src, 1586 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1587 &mask->enc_tp.src, 1588 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1589 sizeof(key->enc_tp.src)) || 1590 fl_dump_key_val(skb, &key->enc_tp.dst, 1591 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1592 &mask->enc_tp.dst, 1593 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1594 sizeof(key->enc_tp.dst)) || 1595 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip)) 1596 goto nla_put_failure; 1597 1598 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1599 goto nla_put_failure; 1600 1601 return 0; 1602 1603 nla_put_failure: 1604 return -EMSGSIZE; 1605 } 1606 1607 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1608 struct sk_buff *skb, struct tcmsg *t) 1609 { 1610 struct cls_fl_filter *f = fh; 1611 struct nlattr *nest; 1612 struct fl_flow_key *key, *mask; 1613 1614 if (!f) 1615 return skb->len; 1616 1617 t->tcm_handle = f->handle; 1618 1619 nest = nla_nest_start(skb, TCA_OPTIONS); 1620 if (!nest) 1621 goto nla_put_failure; 1622 1623 if (f->res.classid && 1624 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1625 goto nla_put_failure; 1626 1627 key = &f->key; 1628 mask = &f->mask->key; 1629 1630 if (fl_dump_key(skb, net, key, mask)) 1631 goto nla_put_failure; 1632 1633 if (!tc_skip_hw(f->flags)) 1634 fl_hw_update_stats(tp, f); 1635 1636 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1637 goto nla_put_failure; 1638 1639 if (tcf_exts_dump(skb, &f->exts)) 1640 goto nla_put_failure; 1641 1642 nla_nest_end(skb, nest); 1643 1644 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1645 goto nla_put_failure; 1646 1647 return skb->len; 1648 1649 nla_put_failure: 1650 nla_nest_cancel(skb, nest); 1651 return -1; 1652 } 1653 1654 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 1655 { 1656 struct fl_flow_tmplt *tmplt = tmplt_priv; 1657 struct fl_flow_key *key, *mask; 1658 struct nlattr *nest; 1659 1660 nest = nla_nest_start(skb, TCA_OPTIONS); 1661 if (!nest) 1662 goto nla_put_failure; 1663 1664 key = &tmplt->dummy_key; 1665 mask = &tmplt->mask; 1666 1667 if (fl_dump_key(skb, net, key, mask)) 1668 goto nla_put_failure; 1669 1670 nla_nest_end(skb, nest); 1671 1672 return skb->len; 1673 1674 nla_put_failure: 1675 nla_nest_cancel(skb, nest); 1676 return -EMSGSIZE; 1677 } 1678 1679 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1680 { 1681 struct cls_fl_filter *f = fh; 1682 1683 if (f && f->res.classid == classid) 1684 f->res.class = cl; 1685 } 1686 1687 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1688 .kind = "flower", 1689 .classify = fl_classify, 1690 .init = fl_init, 1691 .destroy = fl_destroy, 1692 .get = fl_get, 1693 .change = fl_change, 1694 .delete = fl_delete, 1695 .walk = fl_walk, 1696 .reoffload = fl_reoffload, 1697 .dump = fl_dump, 1698 .bind_class = fl_bind_class, 1699 .tmplt_create = fl_tmplt_create, 1700 .tmplt_destroy = fl_tmplt_destroy, 1701 .tmplt_dump = fl_tmplt_dump, 1702 .owner = THIS_MODULE, 1703 }; 1704 1705 static int __init cls_fl_init(void) 1706 { 1707 return register_tcf_proto_ops(&cls_fl_ops); 1708 } 1709 1710 static void __exit cls_fl_exit(void) 1711 { 1712 unregister_tcf_proto_ops(&cls_fl_ops); 1713 } 1714 1715 module_init(cls_fl_init); 1716 module_exit(cls_fl_exit); 1717 1718 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1719 MODULE_DESCRIPTION("Flower classifier"); 1720 MODULE_LICENSE("GPL v2"); 1721