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 #include <net/geneve.h> 28 29 #include <net/dst.h> 30 #include <net/dst_metadata.h> 31 32 struct fl_flow_key { 33 int indev_ifindex; 34 struct flow_dissector_key_control control; 35 struct flow_dissector_key_control enc_control; 36 struct flow_dissector_key_basic basic; 37 struct flow_dissector_key_eth_addrs eth; 38 struct flow_dissector_key_vlan vlan; 39 struct flow_dissector_key_vlan cvlan; 40 union { 41 struct flow_dissector_key_ipv4_addrs ipv4; 42 struct flow_dissector_key_ipv6_addrs ipv6; 43 }; 44 struct flow_dissector_key_ports tp; 45 struct flow_dissector_key_icmp icmp; 46 struct flow_dissector_key_arp arp; 47 struct flow_dissector_key_keyid enc_key_id; 48 union { 49 struct flow_dissector_key_ipv4_addrs enc_ipv4; 50 struct flow_dissector_key_ipv6_addrs enc_ipv6; 51 }; 52 struct flow_dissector_key_ports enc_tp; 53 struct flow_dissector_key_mpls mpls; 54 struct flow_dissector_key_tcp tcp; 55 struct flow_dissector_key_ip ip; 56 struct flow_dissector_key_ip enc_ip; 57 struct flow_dissector_key_enc_opts enc_opts; 58 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */ 59 60 struct fl_flow_mask_range { 61 unsigned short int start; 62 unsigned short int end; 63 }; 64 65 struct fl_flow_mask { 66 struct fl_flow_key key; 67 struct fl_flow_mask_range range; 68 struct rhash_head ht_node; 69 struct rhashtable ht; 70 struct rhashtable_params filter_ht_params; 71 struct flow_dissector dissector; 72 struct list_head filters; 73 struct rcu_work rwork; 74 struct list_head list; 75 }; 76 77 struct fl_flow_tmplt { 78 struct fl_flow_key dummy_key; 79 struct fl_flow_key mask; 80 struct flow_dissector dissector; 81 struct tcf_chain *chain; 82 }; 83 84 struct cls_fl_head { 85 struct rhashtable ht; 86 struct list_head masks; 87 struct rcu_work rwork; 88 struct idr handle_idr; 89 }; 90 91 struct cls_fl_filter { 92 struct fl_flow_mask *mask; 93 struct rhash_head ht_node; 94 struct fl_flow_key mkey; 95 struct tcf_exts exts; 96 struct tcf_result res; 97 struct fl_flow_key key; 98 struct list_head list; 99 u32 handle; 100 u32 flags; 101 u32 in_hw_count; 102 struct rcu_work rwork; 103 struct net_device *hw_dev; 104 }; 105 106 static const struct rhashtable_params mask_ht_params = { 107 .key_offset = offsetof(struct fl_flow_mask, key), 108 .key_len = sizeof(struct fl_flow_key), 109 .head_offset = offsetof(struct fl_flow_mask, ht_node), 110 .automatic_shrinking = true, 111 }; 112 113 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask) 114 { 115 return mask->range.end - mask->range.start; 116 } 117 118 static void fl_mask_update_range(struct fl_flow_mask *mask) 119 { 120 const u8 *bytes = (const u8 *) &mask->key; 121 size_t size = sizeof(mask->key); 122 size_t i, first = 0, last; 123 124 for (i = 0; i < size; i++) { 125 if (bytes[i]) { 126 first = i; 127 break; 128 } 129 } 130 last = first; 131 for (i = size - 1; i != first; i--) { 132 if (bytes[i]) { 133 last = i; 134 break; 135 } 136 } 137 mask->range.start = rounddown(first, sizeof(long)); 138 mask->range.end = roundup(last + 1, sizeof(long)); 139 } 140 141 static void *fl_key_get_start(struct fl_flow_key *key, 142 const struct fl_flow_mask *mask) 143 { 144 return (u8 *) key + mask->range.start; 145 } 146 147 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key, 148 struct fl_flow_mask *mask) 149 { 150 const long *lkey = fl_key_get_start(key, mask); 151 const long *lmask = fl_key_get_start(&mask->key, mask); 152 long *lmkey = fl_key_get_start(mkey, mask); 153 int i; 154 155 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) 156 *lmkey++ = *lkey++ & *lmask++; 157 } 158 159 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt, 160 struct fl_flow_mask *mask) 161 { 162 const long *lmask = fl_key_get_start(&mask->key, mask); 163 const long *ltmplt; 164 int i; 165 166 if (!tmplt) 167 return true; 168 ltmplt = fl_key_get_start(&tmplt->mask, mask); 169 for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) { 170 if (~*ltmplt++ & *lmask++) 171 return false; 172 } 173 return true; 174 } 175 176 static void fl_clear_masked_range(struct fl_flow_key *key, 177 struct fl_flow_mask *mask) 178 { 179 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask)); 180 } 181 182 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask, 183 struct fl_flow_key *mkey) 184 { 185 return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask), 186 mask->filter_ht_params); 187 } 188 189 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp, 190 struct tcf_result *res) 191 { 192 struct cls_fl_head *head = rcu_dereference_bh(tp->root); 193 struct cls_fl_filter *f; 194 struct fl_flow_mask *mask; 195 struct fl_flow_key skb_key; 196 struct fl_flow_key skb_mkey; 197 198 list_for_each_entry_rcu(mask, &head->masks, list) { 199 fl_clear_masked_range(&skb_key, mask); 200 201 skb_key.indev_ifindex = skb->skb_iif; 202 /* skb_flow_dissect() does not set n_proto in case an unknown 203 * protocol, so do it rather here. 204 */ 205 skb_key.basic.n_proto = skb->protocol; 206 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key); 207 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0); 208 209 fl_set_masked_key(&skb_mkey, &skb_key, mask); 210 211 f = fl_lookup(mask, &skb_mkey); 212 if (f && !tc_skip_sw(f->flags)) { 213 *res = f->res; 214 return tcf_exts_exec(skb, &f->exts, res); 215 } 216 } 217 return -1; 218 } 219 220 static int fl_init(struct tcf_proto *tp) 221 { 222 struct cls_fl_head *head; 223 224 head = kzalloc(sizeof(*head), GFP_KERNEL); 225 if (!head) 226 return -ENOBUFS; 227 228 INIT_LIST_HEAD_RCU(&head->masks); 229 rcu_assign_pointer(tp->root, head); 230 idr_init(&head->handle_idr); 231 232 return rhashtable_init(&head->ht, &mask_ht_params); 233 } 234 235 static void fl_mask_free(struct fl_flow_mask *mask) 236 { 237 rhashtable_destroy(&mask->ht); 238 kfree(mask); 239 } 240 241 static void fl_mask_free_work(struct work_struct *work) 242 { 243 struct fl_flow_mask *mask = container_of(to_rcu_work(work), 244 struct fl_flow_mask, rwork); 245 246 fl_mask_free(mask); 247 } 248 249 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask, 250 bool async) 251 { 252 if (!list_empty(&mask->filters)) 253 return false; 254 255 rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params); 256 list_del_rcu(&mask->list); 257 if (async) 258 tcf_queue_work(&mask->rwork, fl_mask_free_work); 259 else 260 fl_mask_free(mask); 261 262 return true; 263 } 264 265 static void __fl_destroy_filter(struct cls_fl_filter *f) 266 { 267 tcf_exts_destroy(&f->exts); 268 tcf_exts_put_net(&f->exts); 269 kfree(f); 270 } 271 272 static void fl_destroy_filter_work(struct work_struct *work) 273 { 274 struct cls_fl_filter *f = container_of(to_rcu_work(work), 275 struct cls_fl_filter, rwork); 276 277 rtnl_lock(); 278 __fl_destroy_filter(f); 279 rtnl_unlock(); 280 } 281 282 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f, 283 struct netlink_ext_ack *extack) 284 { 285 struct tc_cls_flower_offload cls_flower = {}; 286 struct tcf_block *block = tp->chain->block; 287 288 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 289 cls_flower.command = TC_CLSFLOWER_DESTROY; 290 cls_flower.cookie = (unsigned long) f; 291 292 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 293 &cls_flower, false); 294 tcf_block_offload_dec(block, &f->flags); 295 } 296 297 static int fl_hw_replace_filter(struct tcf_proto *tp, 298 struct cls_fl_filter *f, 299 struct netlink_ext_ack *extack) 300 { 301 struct tc_cls_flower_offload cls_flower = {}; 302 struct tcf_block *block = tp->chain->block; 303 bool skip_sw = tc_skip_sw(f->flags); 304 int err; 305 306 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack); 307 cls_flower.command = TC_CLSFLOWER_REPLACE; 308 cls_flower.cookie = (unsigned long) f; 309 cls_flower.dissector = &f->mask->dissector; 310 cls_flower.mask = &f->mask->key; 311 cls_flower.key = &f->mkey; 312 cls_flower.exts = &f->exts; 313 cls_flower.classid = f->res.classid; 314 315 err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 316 &cls_flower, skip_sw); 317 if (err < 0) { 318 fl_hw_destroy_filter(tp, f, NULL); 319 return err; 320 } else if (err > 0) { 321 f->in_hw_count = err; 322 tcf_block_offload_inc(block, &f->flags); 323 } 324 325 if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW)) 326 return -EINVAL; 327 328 return 0; 329 } 330 331 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f) 332 { 333 struct tc_cls_flower_offload cls_flower = {}; 334 struct tcf_block *block = tp->chain->block; 335 336 tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL); 337 cls_flower.command = TC_CLSFLOWER_STATS; 338 cls_flower.cookie = (unsigned long) f; 339 cls_flower.exts = &f->exts; 340 cls_flower.classid = f->res.classid; 341 342 tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER, 343 &cls_flower, false); 344 } 345 346 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f, 347 struct netlink_ext_ack *extack) 348 { 349 struct cls_fl_head *head = rtnl_dereference(tp->root); 350 bool async = tcf_exts_get_net(&f->exts); 351 bool last; 352 353 idr_remove(&head->handle_idr, f->handle); 354 list_del_rcu(&f->list); 355 last = fl_mask_put(head, f->mask, async); 356 if (!tc_skip_hw(f->flags)) 357 fl_hw_destroy_filter(tp, f, extack); 358 tcf_unbind_filter(tp, &f->res); 359 if (async) 360 tcf_queue_work(&f->rwork, fl_destroy_filter_work); 361 else 362 __fl_destroy_filter(f); 363 364 return last; 365 } 366 367 static void fl_destroy_sleepable(struct work_struct *work) 368 { 369 struct cls_fl_head *head = container_of(to_rcu_work(work), 370 struct cls_fl_head, 371 rwork); 372 373 rhashtable_destroy(&head->ht); 374 kfree(head); 375 module_put(THIS_MODULE); 376 } 377 378 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack) 379 { 380 struct cls_fl_head *head = rtnl_dereference(tp->root); 381 struct fl_flow_mask *mask, *next_mask; 382 struct cls_fl_filter *f, *next; 383 384 list_for_each_entry_safe(mask, next_mask, &head->masks, list) { 385 list_for_each_entry_safe(f, next, &mask->filters, list) { 386 if (__fl_delete(tp, f, extack)) 387 break; 388 } 389 } 390 idr_destroy(&head->handle_idr); 391 392 __module_get(THIS_MODULE); 393 tcf_queue_work(&head->rwork, fl_destroy_sleepable); 394 } 395 396 static void *fl_get(struct tcf_proto *tp, u32 handle) 397 { 398 struct cls_fl_head *head = rtnl_dereference(tp->root); 399 400 return idr_find(&head->handle_idr, handle); 401 } 402 403 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = { 404 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC }, 405 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 }, 406 [TCA_FLOWER_INDEV] = { .type = NLA_STRING, 407 .len = IFNAMSIZ }, 408 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN }, 409 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN }, 410 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN }, 411 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN }, 412 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 }, 413 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 }, 414 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 }, 415 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 }, 416 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 }, 417 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 }, 418 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 419 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 420 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 421 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 422 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 }, 423 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 }, 424 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 }, 425 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 }, 426 [TCA_FLOWER_KEY_VLAN_ID] = { .type = NLA_U16 }, 427 [TCA_FLOWER_KEY_VLAN_PRIO] = { .type = NLA_U8 }, 428 [TCA_FLOWER_KEY_VLAN_ETH_TYPE] = { .type = NLA_U16 }, 429 [TCA_FLOWER_KEY_ENC_KEY_ID] = { .type = NLA_U32 }, 430 [TCA_FLOWER_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 }, 431 [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 }, 432 [TCA_FLOWER_KEY_ENC_IPV4_DST] = { .type = NLA_U32 }, 433 [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 }, 434 [TCA_FLOWER_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) }, 435 [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) }, 436 [TCA_FLOWER_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) }, 437 [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) }, 438 [TCA_FLOWER_KEY_TCP_SRC_MASK] = { .type = NLA_U16 }, 439 [TCA_FLOWER_KEY_TCP_DST_MASK] = { .type = NLA_U16 }, 440 [TCA_FLOWER_KEY_UDP_SRC_MASK] = { .type = NLA_U16 }, 441 [TCA_FLOWER_KEY_UDP_DST_MASK] = { .type = NLA_U16 }, 442 [TCA_FLOWER_KEY_SCTP_SRC_MASK] = { .type = NLA_U16 }, 443 [TCA_FLOWER_KEY_SCTP_DST_MASK] = { .type = NLA_U16 }, 444 [TCA_FLOWER_KEY_SCTP_SRC] = { .type = NLA_U16 }, 445 [TCA_FLOWER_KEY_SCTP_DST] = { .type = NLA_U16 }, 446 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT] = { .type = NLA_U16 }, 447 [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK] = { .type = NLA_U16 }, 448 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT] = { .type = NLA_U16 }, 449 [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK] = { .type = NLA_U16 }, 450 [TCA_FLOWER_KEY_FLAGS] = { .type = NLA_U32 }, 451 [TCA_FLOWER_KEY_FLAGS_MASK] = { .type = NLA_U32 }, 452 [TCA_FLOWER_KEY_ICMPV4_TYPE] = { .type = NLA_U8 }, 453 [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 }, 454 [TCA_FLOWER_KEY_ICMPV4_CODE] = { .type = NLA_U8 }, 455 [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 }, 456 [TCA_FLOWER_KEY_ICMPV6_TYPE] = { .type = NLA_U8 }, 457 [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 }, 458 [TCA_FLOWER_KEY_ICMPV6_CODE] = { .type = NLA_U8 }, 459 [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 }, 460 [TCA_FLOWER_KEY_ARP_SIP] = { .type = NLA_U32 }, 461 [TCA_FLOWER_KEY_ARP_SIP_MASK] = { .type = NLA_U32 }, 462 [TCA_FLOWER_KEY_ARP_TIP] = { .type = NLA_U32 }, 463 [TCA_FLOWER_KEY_ARP_TIP_MASK] = { .type = NLA_U32 }, 464 [TCA_FLOWER_KEY_ARP_OP] = { .type = NLA_U8 }, 465 [TCA_FLOWER_KEY_ARP_OP_MASK] = { .type = NLA_U8 }, 466 [TCA_FLOWER_KEY_ARP_SHA] = { .len = ETH_ALEN }, 467 [TCA_FLOWER_KEY_ARP_SHA_MASK] = { .len = ETH_ALEN }, 468 [TCA_FLOWER_KEY_ARP_THA] = { .len = ETH_ALEN }, 469 [TCA_FLOWER_KEY_ARP_THA_MASK] = { .len = ETH_ALEN }, 470 [TCA_FLOWER_KEY_MPLS_TTL] = { .type = NLA_U8 }, 471 [TCA_FLOWER_KEY_MPLS_BOS] = { .type = NLA_U8 }, 472 [TCA_FLOWER_KEY_MPLS_TC] = { .type = NLA_U8 }, 473 [TCA_FLOWER_KEY_MPLS_LABEL] = { .type = NLA_U32 }, 474 [TCA_FLOWER_KEY_TCP_FLAGS] = { .type = NLA_U16 }, 475 [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 }, 476 [TCA_FLOWER_KEY_IP_TOS] = { .type = NLA_U8 }, 477 [TCA_FLOWER_KEY_IP_TOS_MASK] = { .type = NLA_U8 }, 478 [TCA_FLOWER_KEY_IP_TTL] = { .type = NLA_U8 }, 479 [TCA_FLOWER_KEY_IP_TTL_MASK] = { .type = NLA_U8 }, 480 [TCA_FLOWER_KEY_CVLAN_ID] = { .type = NLA_U16 }, 481 [TCA_FLOWER_KEY_CVLAN_PRIO] = { .type = NLA_U8 }, 482 [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 }, 483 [TCA_FLOWER_KEY_ENC_IP_TOS] = { .type = NLA_U8 }, 484 [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 }, 485 [TCA_FLOWER_KEY_ENC_IP_TTL] = { .type = NLA_U8 }, 486 [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 }, 487 [TCA_FLOWER_KEY_ENC_OPTS] = { .type = NLA_NESTED }, 488 [TCA_FLOWER_KEY_ENC_OPTS_MASK] = { .type = NLA_NESTED }, 489 }; 490 491 static const struct nla_policy 492 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = { 493 [TCA_FLOWER_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED }, 494 }; 495 496 static const struct nla_policy 497 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = { 498 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 499 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 500 [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY, 501 .len = 128 }, 502 }; 503 504 static void fl_set_key_val(struct nlattr **tb, 505 void *val, int val_type, 506 void *mask, int mask_type, int len) 507 { 508 if (!tb[val_type]) 509 return; 510 memcpy(val, nla_data(tb[val_type]), len); 511 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type]) 512 memset(mask, 0xff, len); 513 else 514 memcpy(mask, nla_data(tb[mask_type]), len); 515 } 516 517 static int fl_set_key_mpls(struct nlattr **tb, 518 struct flow_dissector_key_mpls *key_val, 519 struct flow_dissector_key_mpls *key_mask) 520 { 521 if (tb[TCA_FLOWER_KEY_MPLS_TTL]) { 522 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]); 523 key_mask->mpls_ttl = MPLS_TTL_MASK; 524 } 525 if (tb[TCA_FLOWER_KEY_MPLS_BOS]) { 526 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]); 527 528 if (bos & ~MPLS_BOS_MASK) 529 return -EINVAL; 530 key_val->mpls_bos = bos; 531 key_mask->mpls_bos = MPLS_BOS_MASK; 532 } 533 if (tb[TCA_FLOWER_KEY_MPLS_TC]) { 534 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]); 535 536 if (tc & ~MPLS_TC_MASK) 537 return -EINVAL; 538 key_val->mpls_tc = tc; 539 key_mask->mpls_tc = MPLS_TC_MASK; 540 } 541 if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) { 542 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]); 543 544 if (label & ~MPLS_LABEL_MASK) 545 return -EINVAL; 546 key_val->mpls_label = label; 547 key_mask->mpls_label = MPLS_LABEL_MASK; 548 } 549 return 0; 550 } 551 552 static void fl_set_key_vlan(struct nlattr **tb, 553 __be16 ethertype, 554 int vlan_id_key, int vlan_prio_key, 555 struct flow_dissector_key_vlan *key_val, 556 struct flow_dissector_key_vlan *key_mask) 557 { 558 #define VLAN_PRIORITY_MASK 0x7 559 560 if (tb[vlan_id_key]) { 561 key_val->vlan_id = 562 nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK; 563 key_mask->vlan_id = VLAN_VID_MASK; 564 } 565 if (tb[vlan_prio_key]) { 566 key_val->vlan_priority = 567 nla_get_u8(tb[vlan_prio_key]) & 568 VLAN_PRIORITY_MASK; 569 key_mask->vlan_priority = VLAN_PRIORITY_MASK; 570 } 571 key_val->vlan_tpid = ethertype; 572 key_mask->vlan_tpid = cpu_to_be16(~0); 573 } 574 575 static void fl_set_key_flag(u32 flower_key, u32 flower_mask, 576 u32 *dissector_key, u32 *dissector_mask, 577 u32 flower_flag_bit, u32 dissector_flag_bit) 578 { 579 if (flower_mask & flower_flag_bit) { 580 *dissector_mask |= dissector_flag_bit; 581 if (flower_key & flower_flag_bit) 582 *dissector_key |= dissector_flag_bit; 583 } 584 } 585 586 static int fl_set_key_flags(struct nlattr **tb, 587 u32 *flags_key, u32 *flags_mask) 588 { 589 u32 key, mask; 590 591 /* mask is mandatory for flags */ 592 if (!tb[TCA_FLOWER_KEY_FLAGS_MASK]) 593 return -EINVAL; 594 595 key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS])); 596 mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK])); 597 598 *flags_key = 0; 599 *flags_mask = 0; 600 601 fl_set_key_flag(key, mask, flags_key, flags_mask, 602 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 603 fl_set_key_flag(key, mask, flags_key, flags_mask, 604 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 605 FLOW_DIS_FIRST_FRAG); 606 607 return 0; 608 } 609 610 static void fl_set_key_ip(struct nlattr **tb, bool encap, 611 struct flow_dissector_key_ip *key, 612 struct flow_dissector_key_ip *mask) 613 { 614 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 615 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 616 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 617 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 618 619 fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)); 620 fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)); 621 } 622 623 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, 624 int depth, int option_len, 625 struct netlink_ext_ack *extack) 626 { 627 struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1]; 628 struct nlattr *class = NULL, *type = NULL, *data = NULL; 629 struct geneve_opt *opt; 630 int err, data_len = 0; 631 632 if (option_len > sizeof(struct geneve_opt)) 633 data_len = option_len - sizeof(struct geneve_opt); 634 635 opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; 636 memset(opt, 0xff, option_len); 637 opt->length = data_len / 4; 638 opt->r1 = 0; 639 opt->r2 = 0; 640 opt->r3 = 0; 641 642 /* If no mask has been prodived we assume an exact match. */ 643 if (!depth) 644 return sizeof(struct geneve_opt) + data_len; 645 646 if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) { 647 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask"); 648 return -EINVAL; 649 } 650 651 err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX, 652 nla, geneve_opt_policy, extack); 653 if (err < 0) 654 return err; 655 656 /* We are not allowed to omit any of CLASS, TYPE or DATA 657 * fields from the key. 658 */ 659 if (!option_len && 660 (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] || 661 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] || 662 !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) { 663 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data"); 664 return -EINVAL; 665 } 666 667 /* Omitting any of CLASS, TYPE or DATA fields is allowed 668 * for the mask. 669 */ 670 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) { 671 int new_len = key->enc_opts.len; 672 673 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]; 674 data_len = nla_len(data); 675 if (data_len < 4) { 676 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long"); 677 return -ERANGE; 678 } 679 if (data_len % 4) { 680 NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long"); 681 return -ERANGE; 682 } 683 684 new_len += sizeof(struct geneve_opt) + data_len; 685 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX); 686 if (new_len > FLOW_DIS_TUN_OPTS_MAX) { 687 NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size"); 688 return -ERANGE; 689 } 690 opt->length = data_len / 4; 691 memcpy(opt->opt_data, nla_data(data), data_len); 692 } 693 694 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) { 695 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]; 696 opt->opt_class = nla_get_be16(class); 697 } 698 699 if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) { 700 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]; 701 opt->type = nla_get_u8(type); 702 } 703 704 return sizeof(struct geneve_opt) + data_len; 705 } 706 707 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key, 708 struct fl_flow_key *mask, 709 struct netlink_ext_ack *extack) 710 { 711 const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL; 712 int err, option_len, key_depth, msk_depth = 0; 713 714 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS], 715 TCA_FLOWER_KEY_ENC_OPTS_MAX, 716 enc_opts_policy, extack); 717 if (err) 718 return err; 719 720 nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]); 721 722 if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) { 723 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK], 724 TCA_FLOWER_KEY_ENC_OPTS_MAX, 725 enc_opts_policy, extack); 726 if (err) 727 return err; 728 729 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 730 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]); 731 } 732 733 nla_for_each_attr(nla_opt_key, nla_enc_key, 734 nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) { 735 switch (nla_type(nla_opt_key)) { 736 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE: 737 option_len = 0; 738 key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 739 option_len = fl_set_geneve_opt(nla_opt_key, key, 740 key_depth, option_len, 741 extack); 742 if (option_len < 0) 743 return option_len; 744 745 key->enc_opts.len += option_len; 746 /* At the same time we need to parse through the mask 747 * in order to verify exact and mask attribute lengths. 748 */ 749 mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT; 750 option_len = fl_set_geneve_opt(nla_opt_msk, mask, 751 msk_depth, option_len, 752 extack); 753 if (option_len < 0) 754 return option_len; 755 756 mask->enc_opts.len += option_len; 757 if (key->enc_opts.len != mask->enc_opts.len) { 758 NL_SET_ERR_MSG(extack, "Key and mask miss aligned"); 759 return -EINVAL; 760 } 761 762 if (msk_depth) 763 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth); 764 break; 765 default: 766 NL_SET_ERR_MSG(extack, "Unknown tunnel option type"); 767 return -EINVAL; 768 } 769 } 770 771 return 0; 772 } 773 774 static int fl_set_key(struct net *net, struct nlattr **tb, 775 struct fl_flow_key *key, struct fl_flow_key *mask, 776 struct netlink_ext_ack *extack) 777 { 778 __be16 ethertype; 779 int ret = 0; 780 #ifdef CONFIG_NET_CLS_IND 781 if (tb[TCA_FLOWER_INDEV]) { 782 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack); 783 if (err < 0) 784 return err; 785 key->indev_ifindex = err; 786 mask->indev_ifindex = 0xffffffff; 787 } 788 #endif 789 790 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 791 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 792 sizeof(key->eth.dst)); 793 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 794 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 795 sizeof(key->eth.src)); 796 797 if (tb[TCA_FLOWER_KEY_ETH_TYPE]) { 798 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]); 799 800 if (eth_type_vlan(ethertype)) { 801 fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID, 802 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, 803 &mask->vlan); 804 805 if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) { 806 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]); 807 if (eth_type_vlan(ethertype)) { 808 fl_set_key_vlan(tb, ethertype, 809 TCA_FLOWER_KEY_CVLAN_ID, 810 TCA_FLOWER_KEY_CVLAN_PRIO, 811 &key->cvlan, &mask->cvlan); 812 fl_set_key_val(tb, &key->basic.n_proto, 813 TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 814 &mask->basic.n_proto, 815 TCA_FLOWER_UNSPEC, 816 sizeof(key->basic.n_proto)); 817 } else { 818 key->basic.n_proto = ethertype; 819 mask->basic.n_proto = cpu_to_be16(~0); 820 } 821 } 822 } else { 823 key->basic.n_proto = ethertype; 824 mask->basic.n_proto = cpu_to_be16(~0); 825 } 826 } 827 828 if (key->basic.n_proto == htons(ETH_P_IP) || 829 key->basic.n_proto == htons(ETH_P_IPV6)) { 830 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 831 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 832 sizeof(key->basic.ip_proto)); 833 fl_set_key_ip(tb, false, &key->ip, &mask->ip); 834 } 835 836 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) { 837 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 838 mask->control.addr_type = ~0; 839 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 840 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 841 sizeof(key->ipv4.src)); 842 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 843 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 844 sizeof(key->ipv4.dst)); 845 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) { 846 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 847 mask->control.addr_type = ~0; 848 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 849 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 850 sizeof(key->ipv6.src)); 851 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 852 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 853 sizeof(key->ipv6.dst)); 854 } 855 856 if (key->basic.ip_proto == IPPROTO_TCP) { 857 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 858 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 859 sizeof(key->tp.src)); 860 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 861 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 862 sizeof(key->tp.dst)); 863 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 864 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 865 sizeof(key->tcp.flags)); 866 } else if (key->basic.ip_proto == IPPROTO_UDP) { 867 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 868 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 869 sizeof(key->tp.src)); 870 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 871 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 872 sizeof(key->tp.dst)); 873 } else if (key->basic.ip_proto == IPPROTO_SCTP) { 874 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 875 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 876 sizeof(key->tp.src)); 877 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 878 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 879 sizeof(key->tp.dst)); 880 } else if (key->basic.n_proto == htons(ETH_P_IP) && 881 key->basic.ip_proto == IPPROTO_ICMP) { 882 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE, 883 &mask->icmp.type, 884 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 885 sizeof(key->icmp.type)); 886 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE, 887 &mask->icmp.code, 888 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 889 sizeof(key->icmp.code)); 890 } else if (key->basic.n_proto == htons(ETH_P_IPV6) && 891 key->basic.ip_proto == IPPROTO_ICMPV6) { 892 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE, 893 &mask->icmp.type, 894 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 895 sizeof(key->icmp.type)); 896 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE, 897 &mask->icmp.code, 898 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 899 sizeof(key->icmp.code)); 900 } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) || 901 key->basic.n_proto == htons(ETH_P_MPLS_MC)) { 902 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls); 903 if (ret) 904 return ret; 905 } else if (key->basic.n_proto == htons(ETH_P_ARP) || 906 key->basic.n_proto == htons(ETH_P_RARP)) { 907 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP, 908 &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK, 909 sizeof(key->arp.sip)); 910 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP, 911 &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK, 912 sizeof(key->arp.tip)); 913 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP, 914 &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK, 915 sizeof(key->arp.op)); 916 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 917 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 918 sizeof(key->arp.sha)); 919 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 920 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 921 sizeof(key->arp.tha)); 922 } 923 924 if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] || 925 tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) { 926 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS; 927 mask->enc_control.addr_type = ~0; 928 fl_set_key_val(tb, &key->enc_ipv4.src, 929 TCA_FLOWER_KEY_ENC_IPV4_SRC, 930 &mask->enc_ipv4.src, 931 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 932 sizeof(key->enc_ipv4.src)); 933 fl_set_key_val(tb, &key->enc_ipv4.dst, 934 TCA_FLOWER_KEY_ENC_IPV4_DST, 935 &mask->enc_ipv4.dst, 936 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 937 sizeof(key->enc_ipv4.dst)); 938 } 939 940 if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] || 941 tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) { 942 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS; 943 mask->enc_control.addr_type = ~0; 944 fl_set_key_val(tb, &key->enc_ipv6.src, 945 TCA_FLOWER_KEY_ENC_IPV6_SRC, 946 &mask->enc_ipv6.src, 947 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 948 sizeof(key->enc_ipv6.src)); 949 fl_set_key_val(tb, &key->enc_ipv6.dst, 950 TCA_FLOWER_KEY_ENC_IPV6_DST, 951 &mask->enc_ipv6.dst, 952 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 953 sizeof(key->enc_ipv6.dst)); 954 } 955 956 fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID, 957 &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC, 958 sizeof(key->enc_key_id.keyid)); 959 960 fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 961 &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 962 sizeof(key->enc_tp.src)); 963 964 fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 965 &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 966 sizeof(key->enc_tp.dst)); 967 968 fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip); 969 970 if (tb[TCA_FLOWER_KEY_ENC_OPTS]) { 971 ret = fl_set_enc_opt(tb, key, mask, extack); 972 if (ret) 973 return ret; 974 } 975 976 if (tb[TCA_FLOWER_KEY_FLAGS]) 977 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags); 978 979 return ret; 980 } 981 982 static void fl_mask_copy(struct fl_flow_mask *dst, 983 struct fl_flow_mask *src) 984 { 985 const void *psrc = fl_key_get_start(&src->key, src); 986 void *pdst = fl_key_get_start(&dst->key, src); 987 988 memcpy(pdst, psrc, fl_mask_range(src)); 989 dst->range = src->range; 990 } 991 992 static const struct rhashtable_params fl_ht_params = { 993 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */ 994 .head_offset = offsetof(struct cls_fl_filter, ht_node), 995 .automatic_shrinking = true, 996 }; 997 998 static int fl_init_mask_hashtable(struct fl_flow_mask *mask) 999 { 1000 mask->filter_ht_params = fl_ht_params; 1001 mask->filter_ht_params.key_len = fl_mask_range(mask); 1002 mask->filter_ht_params.key_offset += mask->range.start; 1003 1004 return rhashtable_init(&mask->ht, &mask->filter_ht_params); 1005 } 1006 1007 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member) 1008 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member) 1009 1010 #define FL_KEY_IS_MASKED(mask, member) \ 1011 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \ 1012 0, FL_KEY_MEMBER_SIZE(member)) \ 1013 1014 #define FL_KEY_SET(keys, cnt, id, member) \ 1015 do { \ 1016 keys[cnt].key_id = id; \ 1017 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \ 1018 cnt++; \ 1019 } while(0); 1020 1021 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \ 1022 do { \ 1023 if (FL_KEY_IS_MASKED(mask, member)) \ 1024 FL_KEY_SET(keys, cnt, id, member); \ 1025 } while(0); 1026 1027 static void fl_init_dissector(struct flow_dissector *dissector, 1028 struct fl_flow_key *mask) 1029 { 1030 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX]; 1031 size_t cnt = 0; 1032 1033 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control); 1034 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic); 1035 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1036 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth); 1037 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1038 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4); 1039 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1040 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6); 1041 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1042 FLOW_DISSECTOR_KEY_PORTS, tp); 1043 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1044 FLOW_DISSECTOR_KEY_IP, ip); 1045 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1046 FLOW_DISSECTOR_KEY_TCP, tcp); 1047 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1048 FLOW_DISSECTOR_KEY_ICMP, icmp); 1049 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1050 FLOW_DISSECTOR_KEY_ARP, arp); 1051 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1052 FLOW_DISSECTOR_KEY_MPLS, mpls); 1053 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1054 FLOW_DISSECTOR_KEY_VLAN, vlan); 1055 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1056 FLOW_DISSECTOR_KEY_CVLAN, cvlan); 1057 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1058 FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id); 1059 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1060 FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4); 1061 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1062 FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6); 1063 if (FL_KEY_IS_MASKED(mask, enc_ipv4) || 1064 FL_KEY_IS_MASKED(mask, enc_ipv6)) 1065 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL, 1066 enc_control); 1067 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1068 FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp); 1069 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1070 FLOW_DISSECTOR_KEY_ENC_IP, enc_ip); 1071 FL_KEY_SET_IF_MASKED(mask, keys, cnt, 1072 FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts); 1073 1074 skb_flow_dissector_init(dissector, keys, cnt); 1075 } 1076 1077 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head, 1078 struct fl_flow_mask *mask) 1079 { 1080 struct fl_flow_mask *newmask; 1081 int err; 1082 1083 newmask = kzalloc(sizeof(*newmask), GFP_KERNEL); 1084 if (!newmask) 1085 return ERR_PTR(-ENOMEM); 1086 1087 fl_mask_copy(newmask, mask); 1088 1089 err = fl_init_mask_hashtable(newmask); 1090 if (err) 1091 goto errout_free; 1092 1093 fl_init_dissector(&newmask->dissector, &newmask->key); 1094 1095 INIT_LIST_HEAD_RCU(&newmask->filters); 1096 1097 err = rhashtable_insert_fast(&head->ht, &newmask->ht_node, 1098 mask_ht_params); 1099 if (err) 1100 goto errout_destroy; 1101 1102 list_add_tail_rcu(&newmask->list, &head->masks); 1103 1104 return newmask; 1105 1106 errout_destroy: 1107 rhashtable_destroy(&newmask->ht); 1108 errout_free: 1109 kfree(newmask); 1110 1111 return ERR_PTR(err); 1112 } 1113 1114 static int fl_check_assign_mask(struct cls_fl_head *head, 1115 struct cls_fl_filter *fnew, 1116 struct cls_fl_filter *fold, 1117 struct fl_flow_mask *mask) 1118 { 1119 struct fl_flow_mask *newmask; 1120 1121 fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params); 1122 if (!fnew->mask) { 1123 if (fold) 1124 return -EINVAL; 1125 1126 newmask = fl_create_new_mask(head, mask); 1127 if (IS_ERR(newmask)) 1128 return PTR_ERR(newmask); 1129 1130 fnew->mask = newmask; 1131 } else if (fold && fold->mask != fnew->mask) { 1132 return -EINVAL; 1133 } 1134 1135 return 0; 1136 } 1137 1138 static int fl_set_parms(struct net *net, struct tcf_proto *tp, 1139 struct cls_fl_filter *f, struct fl_flow_mask *mask, 1140 unsigned long base, struct nlattr **tb, 1141 struct nlattr *est, bool ovr, 1142 struct fl_flow_tmplt *tmplt, 1143 struct netlink_ext_ack *extack) 1144 { 1145 int err; 1146 1147 err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack); 1148 if (err < 0) 1149 return err; 1150 1151 if (tb[TCA_FLOWER_CLASSID]) { 1152 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]); 1153 tcf_bind_filter(tp, &f->res, base); 1154 } 1155 1156 err = fl_set_key(net, tb, &f->key, &mask->key, extack); 1157 if (err) 1158 return err; 1159 1160 fl_mask_update_range(mask); 1161 fl_set_masked_key(&f->mkey, &f->key, mask); 1162 1163 if (!fl_mask_fits_tmplt(tmplt, mask)) { 1164 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template"); 1165 return -EINVAL; 1166 } 1167 1168 return 0; 1169 } 1170 1171 static int fl_change(struct net *net, struct sk_buff *in_skb, 1172 struct tcf_proto *tp, unsigned long base, 1173 u32 handle, struct nlattr **tca, 1174 void **arg, bool ovr, struct netlink_ext_ack *extack) 1175 { 1176 struct cls_fl_head *head = rtnl_dereference(tp->root); 1177 struct cls_fl_filter *fold = *arg; 1178 struct cls_fl_filter *fnew; 1179 struct nlattr **tb; 1180 struct fl_flow_mask mask = {}; 1181 int err; 1182 1183 if (!tca[TCA_OPTIONS]) 1184 return -EINVAL; 1185 1186 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1187 if (!tb) 1188 return -ENOBUFS; 1189 1190 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1191 fl_policy, NULL); 1192 if (err < 0) 1193 goto errout_tb; 1194 1195 if (fold && handle && fold->handle != handle) { 1196 err = -EINVAL; 1197 goto errout_tb; 1198 } 1199 1200 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL); 1201 if (!fnew) { 1202 err = -ENOBUFS; 1203 goto errout_tb; 1204 } 1205 1206 err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0); 1207 if (err < 0) 1208 goto errout; 1209 1210 if (!handle) { 1211 handle = 1; 1212 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1213 INT_MAX, GFP_KERNEL); 1214 } else if (!fold) { 1215 /* user specifies a handle and it doesn't exist */ 1216 err = idr_alloc_u32(&head->handle_idr, fnew, &handle, 1217 handle, GFP_KERNEL); 1218 } 1219 if (err) 1220 goto errout; 1221 fnew->handle = handle; 1222 1223 if (tb[TCA_FLOWER_FLAGS]) { 1224 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]); 1225 1226 if (!tc_flags_valid(fnew->flags)) { 1227 err = -EINVAL; 1228 goto errout_idr; 1229 } 1230 } 1231 1232 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr, 1233 tp->chain->tmplt_priv, extack); 1234 if (err) 1235 goto errout_idr; 1236 1237 err = fl_check_assign_mask(head, fnew, fold, &mask); 1238 if (err) 1239 goto errout_idr; 1240 1241 if (!tc_skip_sw(fnew->flags)) { 1242 if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) { 1243 err = -EEXIST; 1244 goto errout_mask; 1245 } 1246 1247 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node, 1248 fnew->mask->filter_ht_params); 1249 if (err) 1250 goto errout_mask; 1251 } 1252 1253 if (!tc_skip_hw(fnew->flags)) { 1254 err = fl_hw_replace_filter(tp, fnew, extack); 1255 if (err) 1256 goto errout_mask; 1257 } 1258 1259 if (!tc_in_hw(fnew->flags)) 1260 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW; 1261 1262 if (fold) { 1263 if (!tc_skip_sw(fold->flags)) 1264 rhashtable_remove_fast(&fold->mask->ht, 1265 &fold->ht_node, 1266 fold->mask->filter_ht_params); 1267 if (!tc_skip_hw(fold->flags)) 1268 fl_hw_destroy_filter(tp, fold, NULL); 1269 } 1270 1271 *arg = fnew; 1272 1273 if (fold) { 1274 idr_replace(&head->handle_idr, fnew, fnew->handle); 1275 list_replace_rcu(&fold->list, &fnew->list); 1276 tcf_unbind_filter(tp, &fold->res); 1277 tcf_exts_get_net(&fold->exts); 1278 tcf_queue_work(&fold->rwork, fl_destroy_filter_work); 1279 } else { 1280 list_add_tail_rcu(&fnew->list, &fnew->mask->filters); 1281 } 1282 1283 kfree(tb); 1284 return 0; 1285 1286 errout_mask: 1287 fl_mask_put(head, fnew->mask, false); 1288 1289 errout_idr: 1290 if (!fold) 1291 idr_remove(&head->handle_idr, fnew->handle); 1292 errout: 1293 tcf_exts_destroy(&fnew->exts); 1294 kfree(fnew); 1295 errout_tb: 1296 kfree(tb); 1297 return err; 1298 } 1299 1300 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last, 1301 struct netlink_ext_ack *extack) 1302 { 1303 struct cls_fl_head *head = rtnl_dereference(tp->root); 1304 struct cls_fl_filter *f = arg; 1305 1306 if (!tc_skip_sw(f->flags)) 1307 rhashtable_remove_fast(&f->mask->ht, &f->ht_node, 1308 f->mask->filter_ht_params); 1309 __fl_delete(tp, f, extack); 1310 *last = list_empty(&head->masks); 1311 return 0; 1312 } 1313 1314 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg) 1315 { 1316 struct cls_fl_head *head = rtnl_dereference(tp->root); 1317 struct cls_fl_filter *f; 1318 1319 arg->count = arg->skip; 1320 1321 while ((f = idr_get_next_ul(&head->handle_idr, 1322 &arg->cookie)) != NULL) { 1323 if (arg->fn(tp, f, arg) < 0) { 1324 arg->stop = 1; 1325 break; 1326 } 1327 arg->cookie = f->handle + 1; 1328 arg->count++; 1329 } 1330 } 1331 1332 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 1333 void *cb_priv, struct netlink_ext_ack *extack) 1334 { 1335 struct cls_fl_head *head = rtnl_dereference(tp->root); 1336 struct tc_cls_flower_offload cls_flower = {}; 1337 struct tcf_block *block = tp->chain->block; 1338 struct fl_flow_mask *mask; 1339 struct cls_fl_filter *f; 1340 int err; 1341 1342 list_for_each_entry(mask, &head->masks, list) { 1343 list_for_each_entry(f, &mask->filters, list) { 1344 if (tc_skip_hw(f->flags)) 1345 continue; 1346 1347 tc_cls_common_offload_init(&cls_flower.common, tp, 1348 f->flags, extack); 1349 cls_flower.command = add ? 1350 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY; 1351 cls_flower.cookie = (unsigned long)f; 1352 cls_flower.dissector = &mask->dissector; 1353 cls_flower.mask = &mask->key; 1354 cls_flower.key = &f->mkey; 1355 cls_flower.exts = &f->exts; 1356 cls_flower.classid = f->res.classid; 1357 1358 err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv); 1359 if (err) { 1360 if (add && tc_skip_sw(f->flags)) 1361 return err; 1362 continue; 1363 } 1364 1365 tc_cls_offload_cnt_update(block, &f->in_hw_count, 1366 &f->flags, add); 1367 } 1368 } 1369 1370 return 0; 1371 } 1372 1373 static void fl_hw_create_tmplt(struct tcf_chain *chain, 1374 struct fl_flow_tmplt *tmplt) 1375 { 1376 struct tc_cls_flower_offload cls_flower = {}; 1377 struct tcf_block *block = chain->block; 1378 struct tcf_exts dummy_exts = { 0, }; 1379 1380 cls_flower.common.chain_index = chain->index; 1381 cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE; 1382 cls_flower.cookie = (unsigned long) tmplt; 1383 cls_flower.dissector = &tmplt->dissector; 1384 cls_flower.mask = &tmplt->mask; 1385 cls_flower.key = &tmplt->dummy_key; 1386 cls_flower.exts = &dummy_exts; 1387 1388 /* We don't care if driver (any of them) fails to handle this 1389 * call. It serves just as a hint for it. 1390 */ 1391 tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, 1392 &cls_flower, false); 1393 } 1394 1395 static void fl_hw_destroy_tmplt(struct tcf_chain *chain, 1396 struct fl_flow_tmplt *tmplt) 1397 { 1398 struct tc_cls_flower_offload cls_flower = {}; 1399 struct tcf_block *block = chain->block; 1400 1401 cls_flower.common.chain_index = chain->index; 1402 cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY; 1403 cls_flower.cookie = (unsigned long) tmplt; 1404 1405 tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER, 1406 &cls_flower, false); 1407 } 1408 1409 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 1410 struct nlattr **tca, 1411 struct netlink_ext_ack *extack) 1412 { 1413 struct fl_flow_tmplt *tmplt; 1414 struct nlattr **tb; 1415 int err; 1416 1417 if (!tca[TCA_OPTIONS]) 1418 return ERR_PTR(-EINVAL); 1419 1420 tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL); 1421 if (!tb) 1422 return ERR_PTR(-ENOBUFS); 1423 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], 1424 fl_policy, NULL); 1425 if (err) 1426 goto errout_tb; 1427 1428 tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL); 1429 if (!tmplt) { 1430 err = -ENOMEM; 1431 goto errout_tb; 1432 } 1433 tmplt->chain = chain; 1434 err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack); 1435 if (err) 1436 goto errout_tmplt; 1437 kfree(tb); 1438 1439 fl_init_dissector(&tmplt->dissector, &tmplt->mask); 1440 1441 fl_hw_create_tmplt(chain, tmplt); 1442 1443 return tmplt; 1444 1445 errout_tmplt: 1446 kfree(tmplt); 1447 errout_tb: 1448 kfree(tb); 1449 return ERR_PTR(err); 1450 } 1451 1452 static void fl_tmplt_destroy(void *tmplt_priv) 1453 { 1454 struct fl_flow_tmplt *tmplt = tmplt_priv; 1455 1456 fl_hw_destroy_tmplt(tmplt->chain, tmplt); 1457 kfree(tmplt); 1458 } 1459 1460 static int fl_dump_key_val(struct sk_buff *skb, 1461 void *val, int val_type, 1462 void *mask, int mask_type, int len) 1463 { 1464 int err; 1465 1466 if (!memchr_inv(mask, 0, len)) 1467 return 0; 1468 err = nla_put(skb, val_type, len, val); 1469 if (err) 1470 return err; 1471 if (mask_type != TCA_FLOWER_UNSPEC) { 1472 err = nla_put(skb, mask_type, len, mask); 1473 if (err) 1474 return err; 1475 } 1476 return 0; 1477 } 1478 1479 static int fl_dump_key_mpls(struct sk_buff *skb, 1480 struct flow_dissector_key_mpls *mpls_key, 1481 struct flow_dissector_key_mpls *mpls_mask) 1482 { 1483 int err; 1484 1485 if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask))) 1486 return 0; 1487 if (mpls_mask->mpls_ttl) { 1488 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL, 1489 mpls_key->mpls_ttl); 1490 if (err) 1491 return err; 1492 } 1493 if (mpls_mask->mpls_tc) { 1494 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC, 1495 mpls_key->mpls_tc); 1496 if (err) 1497 return err; 1498 } 1499 if (mpls_mask->mpls_label) { 1500 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL, 1501 mpls_key->mpls_label); 1502 if (err) 1503 return err; 1504 } 1505 if (mpls_mask->mpls_bos) { 1506 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS, 1507 mpls_key->mpls_bos); 1508 if (err) 1509 return err; 1510 } 1511 return 0; 1512 } 1513 1514 static int fl_dump_key_ip(struct sk_buff *skb, bool encap, 1515 struct flow_dissector_key_ip *key, 1516 struct flow_dissector_key_ip *mask) 1517 { 1518 int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS; 1519 int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL; 1520 int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK; 1521 int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK; 1522 1523 if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) || 1524 fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl))) 1525 return -1; 1526 1527 return 0; 1528 } 1529 1530 static int fl_dump_key_vlan(struct sk_buff *skb, 1531 int vlan_id_key, int vlan_prio_key, 1532 struct flow_dissector_key_vlan *vlan_key, 1533 struct flow_dissector_key_vlan *vlan_mask) 1534 { 1535 int err; 1536 1537 if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask))) 1538 return 0; 1539 if (vlan_mask->vlan_id) { 1540 err = nla_put_u16(skb, vlan_id_key, 1541 vlan_key->vlan_id); 1542 if (err) 1543 return err; 1544 } 1545 if (vlan_mask->vlan_priority) { 1546 err = nla_put_u8(skb, vlan_prio_key, 1547 vlan_key->vlan_priority); 1548 if (err) 1549 return err; 1550 } 1551 return 0; 1552 } 1553 1554 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask, 1555 u32 *flower_key, u32 *flower_mask, 1556 u32 flower_flag_bit, u32 dissector_flag_bit) 1557 { 1558 if (dissector_mask & dissector_flag_bit) { 1559 *flower_mask |= flower_flag_bit; 1560 if (dissector_key & dissector_flag_bit) 1561 *flower_key |= flower_flag_bit; 1562 } 1563 } 1564 1565 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask) 1566 { 1567 u32 key, mask; 1568 __be32 _key, _mask; 1569 int err; 1570 1571 if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask))) 1572 return 0; 1573 1574 key = 0; 1575 mask = 0; 1576 1577 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1578 TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT); 1579 fl_get_key_flag(flags_key, flags_mask, &key, &mask, 1580 TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST, 1581 FLOW_DIS_FIRST_FRAG); 1582 1583 _key = cpu_to_be32(key); 1584 _mask = cpu_to_be32(mask); 1585 1586 err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key); 1587 if (err) 1588 return err; 1589 1590 return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask); 1591 } 1592 1593 static int fl_dump_key_geneve_opt(struct sk_buff *skb, 1594 struct flow_dissector_key_enc_opts *enc_opts) 1595 { 1596 struct geneve_opt *opt; 1597 struct nlattr *nest; 1598 int opt_off = 0; 1599 1600 nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE); 1601 if (!nest) 1602 goto nla_put_failure; 1603 1604 while (enc_opts->len > opt_off) { 1605 opt = (struct geneve_opt *)&enc_opts->data[opt_off]; 1606 1607 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS, 1608 opt->opt_class)) 1609 goto nla_put_failure; 1610 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE, 1611 opt->type)) 1612 goto nla_put_failure; 1613 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA, 1614 opt->length * 4, opt->opt_data)) 1615 goto nla_put_failure; 1616 1617 opt_off += sizeof(struct geneve_opt) + opt->length * 4; 1618 } 1619 nla_nest_end(skb, nest); 1620 return 0; 1621 1622 nla_put_failure: 1623 nla_nest_cancel(skb, nest); 1624 return -EMSGSIZE; 1625 } 1626 1627 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type, 1628 struct flow_dissector_key_enc_opts *enc_opts) 1629 { 1630 struct nlattr *nest; 1631 int err; 1632 1633 if (!enc_opts->len) 1634 return 0; 1635 1636 nest = nla_nest_start(skb, enc_opt_type); 1637 if (!nest) 1638 goto nla_put_failure; 1639 1640 switch (enc_opts->dst_opt_type) { 1641 case TUNNEL_GENEVE_OPT: 1642 err = fl_dump_key_geneve_opt(skb, enc_opts); 1643 if (err) 1644 goto nla_put_failure; 1645 break; 1646 default: 1647 goto nla_put_failure; 1648 } 1649 nla_nest_end(skb, nest); 1650 return 0; 1651 1652 nla_put_failure: 1653 nla_nest_cancel(skb, nest); 1654 return -EMSGSIZE; 1655 } 1656 1657 static int fl_dump_key_enc_opt(struct sk_buff *skb, 1658 struct flow_dissector_key_enc_opts *key_opts, 1659 struct flow_dissector_key_enc_opts *msk_opts) 1660 { 1661 int err; 1662 1663 err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts); 1664 if (err) 1665 return err; 1666 1667 return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts); 1668 } 1669 1670 static int fl_dump_key(struct sk_buff *skb, struct net *net, 1671 struct fl_flow_key *key, struct fl_flow_key *mask) 1672 { 1673 if (mask->indev_ifindex) { 1674 struct net_device *dev; 1675 1676 dev = __dev_get_by_index(net, key->indev_ifindex); 1677 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name)) 1678 goto nla_put_failure; 1679 } 1680 1681 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST, 1682 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK, 1683 sizeof(key->eth.dst)) || 1684 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC, 1685 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK, 1686 sizeof(key->eth.src)) || 1687 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE, 1688 &mask->basic.n_proto, TCA_FLOWER_UNSPEC, 1689 sizeof(key->basic.n_proto))) 1690 goto nla_put_failure; 1691 1692 if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls)) 1693 goto nla_put_failure; 1694 1695 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID, 1696 TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan)) 1697 goto nla_put_failure; 1698 1699 if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID, 1700 TCA_FLOWER_KEY_CVLAN_PRIO, 1701 &key->cvlan, &mask->cvlan) || 1702 (mask->cvlan.vlan_tpid && 1703 nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1704 key->cvlan.vlan_tpid))) 1705 goto nla_put_failure; 1706 1707 if (mask->basic.n_proto) { 1708 if (mask->cvlan.vlan_tpid) { 1709 if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE, 1710 key->basic.n_proto)) 1711 goto nla_put_failure; 1712 } else if (mask->vlan.vlan_tpid) { 1713 if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE, 1714 key->basic.n_proto)) 1715 goto nla_put_failure; 1716 } 1717 } 1718 1719 if ((key->basic.n_proto == htons(ETH_P_IP) || 1720 key->basic.n_proto == htons(ETH_P_IPV6)) && 1721 (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO, 1722 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC, 1723 sizeof(key->basic.ip_proto)) || 1724 fl_dump_key_ip(skb, false, &key->ip, &mask->ip))) 1725 goto nla_put_failure; 1726 1727 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1728 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC, 1729 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK, 1730 sizeof(key->ipv4.src)) || 1731 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST, 1732 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK, 1733 sizeof(key->ipv4.dst)))) 1734 goto nla_put_failure; 1735 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1736 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC, 1737 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK, 1738 sizeof(key->ipv6.src)) || 1739 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST, 1740 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK, 1741 sizeof(key->ipv6.dst)))) 1742 goto nla_put_failure; 1743 1744 if (key->basic.ip_proto == IPPROTO_TCP && 1745 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC, 1746 &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK, 1747 sizeof(key->tp.src)) || 1748 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST, 1749 &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK, 1750 sizeof(key->tp.dst)) || 1751 fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS, 1752 &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK, 1753 sizeof(key->tcp.flags)))) 1754 goto nla_put_failure; 1755 else if (key->basic.ip_proto == IPPROTO_UDP && 1756 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC, 1757 &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK, 1758 sizeof(key->tp.src)) || 1759 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST, 1760 &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK, 1761 sizeof(key->tp.dst)))) 1762 goto nla_put_failure; 1763 else if (key->basic.ip_proto == IPPROTO_SCTP && 1764 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC, 1765 &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK, 1766 sizeof(key->tp.src)) || 1767 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST, 1768 &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK, 1769 sizeof(key->tp.dst)))) 1770 goto nla_put_failure; 1771 else if (key->basic.n_proto == htons(ETH_P_IP) && 1772 key->basic.ip_proto == IPPROTO_ICMP && 1773 (fl_dump_key_val(skb, &key->icmp.type, 1774 TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type, 1775 TCA_FLOWER_KEY_ICMPV4_TYPE_MASK, 1776 sizeof(key->icmp.type)) || 1777 fl_dump_key_val(skb, &key->icmp.code, 1778 TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code, 1779 TCA_FLOWER_KEY_ICMPV4_CODE_MASK, 1780 sizeof(key->icmp.code)))) 1781 goto nla_put_failure; 1782 else if (key->basic.n_proto == htons(ETH_P_IPV6) && 1783 key->basic.ip_proto == IPPROTO_ICMPV6 && 1784 (fl_dump_key_val(skb, &key->icmp.type, 1785 TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type, 1786 TCA_FLOWER_KEY_ICMPV6_TYPE_MASK, 1787 sizeof(key->icmp.type)) || 1788 fl_dump_key_val(skb, &key->icmp.code, 1789 TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code, 1790 TCA_FLOWER_KEY_ICMPV6_CODE_MASK, 1791 sizeof(key->icmp.code)))) 1792 goto nla_put_failure; 1793 else if ((key->basic.n_proto == htons(ETH_P_ARP) || 1794 key->basic.n_proto == htons(ETH_P_RARP)) && 1795 (fl_dump_key_val(skb, &key->arp.sip, 1796 TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip, 1797 TCA_FLOWER_KEY_ARP_SIP_MASK, 1798 sizeof(key->arp.sip)) || 1799 fl_dump_key_val(skb, &key->arp.tip, 1800 TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip, 1801 TCA_FLOWER_KEY_ARP_TIP_MASK, 1802 sizeof(key->arp.tip)) || 1803 fl_dump_key_val(skb, &key->arp.op, 1804 TCA_FLOWER_KEY_ARP_OP, &mask->arp.op, 1805 TCA_FLOWER_KEY_ARP_OP_MASK, 1806 sizeof(key->arp.op)) || 1807 fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA, 1808 mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK, 1809 sizeof(key->arp.sha)) || 1810 fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA, 1811 mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK, 1812 sizeof(key->arp.tha)))) 1813 goto nla_put_failure; 1814 1815 if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS && 1816 (fl_dump_key_val(skb, &key->enc_ipv4.src, 1817 TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src, 1818 TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK, 1819 sizeof(key->enc_ipv4.src)) || 1820 fl_dump_key_val(skb, &key->enc_ipv4.dst, 1821 TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst, 1822 TCA_FLOWER_KEY_ENC_IPV4_DST_MASK, 1823 sizeof(key->enc_ipv4.dst)))) 1824 goto nla_put_failure; 1825 else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS && 1826 (fl_dump_key_val(skb, &key->enc_ipv6.src, 1827 TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src, 1828 TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK, 1829 sizeof(key->enc_ipv6.src)) || 1830 fl_dump_key_val(skb, &key->enc_ipv6.dst, 1831 TCA_FLOWER_KEY_ENC_IPV6_DST, 1832 &mask->enc_ipv6.dst, 1833 TCA_FLOWER_KEY_ENC_IPV6_DST_MASK, 1834 sizeof(key->enc_ipv6.dst)))) 1835 goto nla_put_failure; 1836 1837 if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID, 1838 &mask->enc_key_id, TCA_FLOWER_UNSPEC, 1839 sizeof(key->enc_key_id)) || 1840 fl_dump_key_val(skb, &key->enc_tp.src, 1841 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT, 1842 &mask->enc_tp.src, 1843 TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK, 1844 sizeof(key->enc_tp.src)) || 1845 fl_dump_key_val(skb, &key->enc_tp.dst, 1846 TCA_FLOWER_KEY_ENC_UDP_DST_PORT, 1847 &mask->enc_tp.dst, 1848 TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK, 1849 sizeof(key->enc_tp.dst)) || 1850 fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) || 1851 fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts)) 1852 goto nla_put_failure; 1853 1854 if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags)) 1855 goto nla_put_failure; 1856 1857 return 0; 1858 1859 nla_put_failure: 1860 return -EMSGSIZE; 1861 } 1862 1863 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh, 1864 struct sk_buff *skb, struct tcmsg *t) 1865 { 1866 struct cls_fl_filter *f = fh; 1867 struct nlattr *nest; 1868 struct fl_flow_key *key, *mask; 1869 1870 if (!f) 1871 return skb->len; 1872 1873 t->tcm_handle = f->handle; 1874 1875 nest = nla_nest_start(skb, TCA_OPTIONS); 1876 if (!nest) 1877 goto nla_put_failure; 1878 1879 if (f->res.classid && 1880 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid)) 1881 goto nla_put_failure; 1882 1883 key = &f->key; 1884 mask = &f->mask->key; 1885 1886 if (fl_dump_key(skb, net, key, mask)) 1887 goto nla_put_failure; 1888 1889 if (!tc_skip_hw(f->flags)) 1890 fl_hw_update_stats(tp, f); 1891 1892 if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags)) 1893 goto nla_put_failure; 1894 1895 if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count)) 1896 goto nla_put_failure; 1897 1898 if (tcf_exts_dump(skb, &f->exts)) 1899 goto nla_put_failure; 1900 1901 nla_nest_end(skb, nest); 1902 1903 if (tcf_exts_dump_stats(skb, &f->exts) < 0) 1904 goto nla_put_failure; 1905 1906 return skb->len; 1907 1908 nla_put_failure: 1909 nla_nest_cancel(skb, nest); 1910 return -1; 1911 } 1912 1913 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv) 1914 { 1915 struct fl_flow_tmplt *tmplt = tmplt_priv; 1916 struct fl_flow_key *key, *mask; 1917 struct nlattr *nest; 1918 1919 nest = nla_nest_start(skb, TCA_OPTIONS); 1920 if (!nest) 1921 goto nla_put_failure; 1922 1923 key = &tmplt->dummy_key; 1924 mask = &tmplt->mask; 1925 1926 if (fl_dump_key(skb, net, key, mask)) 1927 goto nla_put_failure; 1928 1929 nla_nest_end(skb, nest); 1930 1931 return skb->len; 1932 1933 nla_put_failure: 1934 nla_nest_cancel(skb, nest); 1935 return -EMSGSIZE; 1936 } 1937 1938 static void fl_bind_class(void *fh, u32 classid, unsigned long cl) 1939 { 1940 struct cls_fl_filter *f = fh; 1941 1942 if (f && f->res.classid == classid) 1943 f->res.class = cl; 1944 } 1945 1946 static struct tcf_proto_ops cls_fl_ops __read_mostly = { 1947 .kind = "flower", 1948 .classify = fl_classify, 1949 .init = fl_init, 1950 .destroy = fl_destroy, 1951 .get = fl_get, 1952 .change = fl_change, 1953 .delete = fl_delete, 1954 .walk = fl_walk, 1955 .reoffload = fl_reoffload, 1956 .dump = fl_dump, 1957 .bind_class = fl_bind_class, 1958 .tmplt_create = fl_tmplt_create, 1959 .tmplt_destroy = fl_tmplt_destroy, 1960 .tmplt_dump = fl_tmplt_dump, 1961 .owner = THIS_MODULE, 1962 }; 1963 1964 static int __init cls_fl_init(void) 1965 { 1966 return register_tcf_proto_ops(&cls_fl_ops); 1967 } 1968 1969 static void __exit cls_fl_exit(void) 1970 { 1971 unregister_tcf_proto_ops(&cls_fl_ops); 1972 } 1973 1974 module_init(cls_fl_init); 1975 module_exit(cls_fl_exit); 1976 1977 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>"); 1978 MODULE_DESCRIPTION("Flower classifier"); 1979 MODULE_LICENSE("GPL v2"); 1980