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