net/sched/cls_flower.c

   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         unsigned int 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                 flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
 200                 fl_clear_masked_range(&skb_key, mask);
 201
 202                 skb_key.indev_ifindex = skb->skb_iif;
 203                 /* skb_flow_dissect() does not set n_proto in case an unknown
 204                  * protocol, so do it rather here.
 205                  */
 206                 skb_key.basic.n_proto = skb_protocol(skb, false);
 207                 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
 208                 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
 209
 210                 fl_set_masked_key(&skb_mkey, &skb_key, mask);
 211
 212                 f = fl_lookup(mask, &skb_mkey);
 213                 if (f && !tc_skip_sw(f->flags)) {
 214                         *res = f->res;
 215                         return tcf_exts_exec(skb, &f->exts, res);
 216                 }
 217         }
 218         return -1;
 219 }
 220
 221 static int fl_init(struct tcf_proto *tp)
 222 {
 223         struct cls_fl_head *head;
 224
 225         head = kzalloc(sizeof(*head), GFP_KERNEL);
 226         if (!head)
 227                 return -ENOBUFS;
 228
 229         INIT_LIST_HEAD_RCU(&head->masks);
 230         rcu_assign_pointer(tp->root, head);
 231         idr_init(&head->handle_idr);
 232
 233         return rhashtable_init(&head->ht, &mask_ht_params);
 234 }
 235
 236 static void fl_mask_free(struct fl_flow_mask *mask)
 237 {
 238         rhashtable_destroy(&mask->ht);
 239         kfree(mask);
 240 }
 241
 242 static void fl_mask_free_work(struct work_struct *work)
 243 {
 244         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 245                                                  struct fl_flow_mask, rwork);
 246
 247         fl_mask_free(mask);
 248 }
 249
 250 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask,
 251                         bool async)
 252 {
 253         if (!list_empty(&mask->filters))
 254                 return false;
 255
 256         rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
 257         list_del_rcu(&mask->list);
 258         if (async)
 259                 tcf_queue_work(&mask->rwork, fl_mask_free_work);
 260         else
 261                 fl_mask_free(mask);
 262
 263         return true;
 264 }
 265
 266 static void __fl_destroy_filter(struct cls_fl_filter *f)
 267 {
 268         tcf_exts_destroy(&f->exts);
 269         tcf_exts_put_net(&f->exts);
 270         kfree(f);
 271 }
 272
 273 static void fl_destroy_filter_work(struct work_struct *work)
 274 {
 275         struct cls_fl_filter *f = container_of(to_rcu_work(work),
 276                                         struct cls_fl_filter, rwork);
 277
 278         rtnl_lock();
 279         __fl_destroy_filter(f);
 280         rtnl_unlock();
 281 }
 282
 283 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
 284                                  struct netlink_ext_ack *extack)
 285 {
 286         struct tc_cls_flower_offload cls_flower = {};
 287         struct tcf_block *block = tp->chain->block;
 288
 289         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 290         cls_flower.command = TC_CLSFLOWER_DESTROY;
 291         cls_flower.cookie = (unsigned long) f;
 292
 293         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 294                          &cls_flower, false);
 295         tcf_block_offload_dec(block, &f->flags);
 296 }
 297
 298 static int fl_hw_replace_filter(struct tcf_proto *tp,
 299                                 struct cls_fl_filter *f,
 300                                 struct netlink_ext_ack *extack)
 301 {
 302         struct tc_cls_flower_offload cls_flower = {};
 303         struct tcf_block *block = tp->chain->block;
 304         bool skip_sw = tc_skip_sw(f->flags);
 305         int err;
 306
 307         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 308         cls_flower.command = TC_CLSFLOWER_REPLACE;
 309         cls_flower.cookie = (unsigned long) f;
 310         cls_flower.dissector = &f->mask->dissector;
 311         cls_flower.mask = &f->mask->key;
 312         cls_flower.key = &f->mkey;
 313         cls_flower.exts = &f->exts;
 314         cls_flower.classid = f->res.classid;
 315
 316         err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 317                                &cls_flower, skip_sw);
 318         if (err < 0) {
 319                 fl_hw_destroy_filter(tp, f, NULL);
 320                 return err;
 321         } else if (err > 0) {
 322                 f->in_hw_count = err;
 323                 tcf_block_offload_inc(block, &f->flags);
 324         }
 325
 326         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 327                 return -EINVAL;
 328
 329         return 0;
 330 }
 331
 332 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 333 {
 334         struct tc_cls_flower_offload cls_flower = {};
 335         struct tcf_block *block = tp->chain->block;
 336
 337         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
 338         cls_flower.command = TC_CLSFLOWER_STATS;
 339         cls_flower.cookie = (unsigned long) f;
 340         cls_flower.exts = &f->exts;
 341         cls_flower.classid = f->res.classid;
 342
 343         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 344                          &cls_flower, false);
 345 }
 346
 347 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
 348                         struct netlink_ext_ack *extack)
 349 {
 350         struct cls_fl_head *head = rtnl_dereference(tp->root);
 351         bool async = tcf_exts_get_net(&f->exts);
 352         bool last;
 353
 354         idr_remove(&head->handle_idr, f->handle);
 355         list_del_rcu(&f->list);
 356         last = fl_mask_put(head, f->mask, async);
 357         if (!tc_skip_hw(f->flags))
 358                 fl_hw_destroy_filter(tp, f, extack);
 359         tcf_unbind_filter(tp, &f->res);
 360         if (async)
 361                 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
 362         else
 363                 __fl_destroy_filter(f);
 364
 365         return last;
 366 }
 367
 368 static void fl_destroy_sleepable(struct work_struct *work)
 369 {
 370         struct cls_fl_head *head = container_of(to_rcu_work(work),
 371                                                 struct cls_fl_head,
 372                                                 rwork);
 373
 374         rhashtable_destroy(&head->ht);
 375         kfree(head);
 376         module_put(THIS_MODULE);
 377 }
 378
 379 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
 380 {
 381         struct cls_fl_head *head = rtnl_dereference(tp->root);
 382         struct fl_flow_mask *mask, *next_mask;
 383         struct cls_fl_filter *f, *next;
 384
 385         list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
 386                 list_for_each_entry_safe(f, next, &mask->filters, list) {
 387                         if (__fl_delete(tp, f, extack))
 388                                 break;
 389                 }
 390         }
 391         idr_destroy(&head->handle_idr);
 392
 393         __module_get(THIS_MODULE);
 394         tcf_queue_work(&head->rwork, fl_destroy_sleepable);
 395 }
 396
 397 static void *fl_get(struct tcf_proto *tp, u32 handle)
 398 {
 399         struct cls_fl_head *head = rtnl_dereference(tp->root);
 400
 401         return idr_find(&head->handle_idr, handle);
 402 }
 403
 404 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 405         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 406         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 407         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 408                                             .len = IFNAMSIZ },
 409         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 410         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 411         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 412         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 413         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 414         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 415         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 416         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 417         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 418         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 419         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 420         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 421         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 422         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 423         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 424         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 425         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 426         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 427         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 428         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 429         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 430         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 431         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 432         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 433         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 434         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 435         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 436         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 437         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 438         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 439         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 440         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 441         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 442         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 443         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 444         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 445         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 446         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 447         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 448         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 449         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 450         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 451         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 452         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 453         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 454         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 455         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 456         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 457         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 458         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 459         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 460         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 461         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 462         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 463         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 464         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 465         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 466         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 467         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 468         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 469         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 470         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 471         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 472         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 473         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 474         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 475         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 476         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 477         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 478         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 479         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 480         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 481         [TCA_FLOWER_KEY_CVLAN_ID]       = { .type = NLA_U16 },
 482         [TCA_FLOWER_KEY_CVLAN_PRIO]     = { .type = NLA_U8 },
 483         [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
 484         [TCA_FLOWER_KEY_ENC_IP_TOS]     = { .type = NLA_U8 },
 485         [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
 486         [TCA_FLOWER_KEY_ENC_IP_TTL]      = { .type = NLA_U8 },
 487         [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
 488         [TCA_FLOWER_KEY_ENC_OPTS]       = { .type = NLA_NESTED },
 489         [TCA_FLOWER_KEY_ENC_OPTS_MASK]  = { .type = NLA_NESTED },
 490         [TCA_FLOWER_FLAGS]              = { .type = NLA_U32 },
 491 };
 492
 493 static const struct nla_policy
 494 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
 495         [TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
 496 };
 497
 498 static const struct nla_policy
 499 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
 500         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
 501         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
 502         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
 503                                                        .len = 128 },
 504 };
 505
 506 static void fl_set_key_val(struct nlattr **tb,
 507                            void *val, int val_type,
 508                            void *mask, int mask_type, int len)
 509 {
 510         if (!tb[val_type])
 511                 return;
 512         memcpy(val, nla_data(tb[val_type]), len);
 513         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 514                 memset(mask, 0xff, len);
 515         else
 516                 memcpy(mask, nla_data(tb[mask_type]), len);
 517 }
 518
 519 static int fl_set_key_mpls(struct nlattr **tb,
 520                            struct flow_dissector_key_mpls *key_val,
 521                            struct flow_dissector_key_mpls *key_mask)
 522 {
 523         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 524                 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 525                 key_mask->mpls_ttl = MPLS_TTL_MASK;
 526         }
 527         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 528                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 529
 530                 if (bos & ~MPLS_BOS_MASK)
 531                         return -EINVAL;
 532                 key_val->mpls_bos = bos;
 533                 key_mask->mpls_bos = MPLS_BOS_MASK;
 534         }
 535         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
 536                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
 537
 538                 if (tc & ~MPLS_TC_MASK)
 539                         return -EINVAL;
 540                 key_val->mpls_tc = tc;
 541                 key_mask->mpls_tc = MPLS_TC_MASK;
 542         }
 543         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 544                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
 545
 546                 if (label & ~MPLS_LABEL_MASK)
 547                         return -EINVAL;
 548                 key_val->mpls_label = label;
 549                 key_mask->mpls_label = MPLS_LABEL_MASK;
 550         }
 551         return 0;
 552 }
 553
 554 static void fl_set_key_vlan(struct nlattr **tb,
 555                             __be16 ethertype,
 556                             int vlan_id_key, int vlan_prio_key,
 557                             int vlan_next_eth_type_key,
 558                             struct flow_dissector_key_vlan *key_val,
 559                             struct flow_dissector_key_vlan *key_mask)
 560 {
 561 #define VLAN_PRIORITY_MASK      0x7
 562
 563         if (tb[vlan_id_key]) {
 564                 key_val->vlan_id =
 565                         nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
 566                 key_mask->vlan_id = VLAN_VID_MASK;
 567         }
 568         if (tb[vlan_prio_key]) {
 569                 key_val->vlan_priority =
 570                         nla_get_u8(tb[vlan_prio_key]) &
 571                         VLAN_PRIORITY_MASK;
 572                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 573         }
 574         key_val->vlan_tpid = ethertype;
 575         key_mask->vlan_tpid = cpu_to_be16(~0);
 576         if (tb[vlan_next_eth_type_key]) {
 577                 key_val->vlan_eth_type =
 578                         nla_get_be16(tb[vlan_next_eth_type_key]);
 579                 key_mask->vlan_eth_type = cpu_to_be16(~0);
 580         }
 581 }
 582
 583 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
 584                             u32 *dissector_key, u32 *dissector_mask,
 585                             u32 flower_flag_bit, u32 dissector_flag_bit)
 586 {
 587         if (flower_mask & flower_flag_bit) {
 588                 *dissector_mask |= dissector_flag_bit;
 589                 if (flower_key & flower_flag_bit)
 590                         *dissector_key |= dissector_flag_bit;
 591         }
 592 }
 593
 594 static int fl_set_key_flags(struct nlattr **tb,
 595                             u32 *flags_key, u32 *flags_mask)
 596 {
 597         u32 key, mask;
 598
 599         /* mask is mandatory for flags */
 600         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
 601                 return -EINVAL;
 602
 603         key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
 604         mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
 605
 606         *flags_key  = 0;
 607         *flags_mask = 0;
 608
 609         fl_set_key_flag(key, mask, flags_key, flags_mask,
 610                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
 611         fl_set_key_flag(key, mask, flags_key, flags_mask,
 612                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
 613                         FLOW_DIS_FIRST_FRAG);
 614
 615         return 0;
 616 }
 617
 618 static void fl_set_key_ip(struct nlattr **tb, bool encap,
 619                           struct flow_dissector_key_ip *key,
 620                           struct flow_dissector_key_ip *mask)
 621 {
 622         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
 623         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
 624         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
 625         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
 626
 627         fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
 628         fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
 629 }
 630
 631 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
 632                              int depth, int option_len,
 633                              struct netlink_ext_ack *extack)
 634 {
 635         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
 636         struct nlattr *class = NULL, *type = NULL, *data = NULL;
 637         struct geneve_opt *opt;
 638         int err, data_len = 0;
 639
 640         if (option_len > sizeof(struct geneve_opt))
 641                 data_len = option_len - sizeof(struct geneve_opt);
 642
 643         opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
 644         memset(opt, 0xff, option_len);
 645         opt->length = data_len / 4;
 646         opt->r1 = 0;
 647         opt->r2 = 0;
 648         opt->r3 = 0;
 649
 650         /* If no mask has been prodived we assume an exact match. */
 651         if (!depth)
 652                 return sizeof(struct geneve_opt) + data_len;
 653
 654         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
 655                 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
 656                 return -EINVAL;
 657         }
 658
 659         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
 660                                nla, geneve_opt_policy, extack);
 661         if (err < 0)
 662                 return err;
 663
 664         /* We are not allowed to omit any of CLASS, TYPE or DATA
 665          * fields from the key.
 666          */
 667         if (!option_len &&
 668             (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
 669              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
 670              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
 671                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
 672                 return -EINVAL;
 673         }
 674
 675         /* Omitting any of CLASS, TYPE or DATA fields is allowed
 676          * for the mask.
 677          */
 678         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
 679                 int new_len = key->enc_opts.len;
 680
 681                 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
 682                 data_len = nla_len(data);
 683                 if (data_len < 4) {
 684                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
 685                         return -ERANGE;
 686                 }
 687                 if (data_len % 4) {
 688                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
 689                         return -ERANGE;
 690                 }
 691
 692                 new_len += sizeof(struct geneve_opt) + data_len;
 693                 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
 694                 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
 695                         NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
 696                         return -ERANGE;
 697                 }
 698                 opt->length = data_len / 4;
 699                 memcpy(opt->opt_data, nla_data(data), data_len);
 700         }
 701
 702         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
 703                 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
 704                 opt->opt_class = nla_get_be16(class);
 705         }
 706
 707         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
 708                 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
 709                 opt->type = nla_get_u8(type);
 710         }
 711
 712         return sizeof(struct geneve_opt) + data_len;
 713 }
 714
 715 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
 716                           struct fl_flow_key *mask,
 717                           struct netlink_ext_ack *extack)
 718 {
 719         const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
 720         int err, option_len, key_depth, msk_depth = 0;
 721
 722         err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS],
 723                                   TCA_FLOWER_KEY_ENC_OPTS_MAX,
 724                                   enc_opts_policy, extack);
 725         if (err)
 726                 return err;
 727
 728         nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
 729
 730         if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
 731                 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
 732                                           TCA_FLOWER_KEY_ENC_OPTS_MAX,
 733                                           enc_opts_policy, extack);
 734                 if (err)
 735                         return err;
 736
 737                 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
 738                 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
 739         }
 740
 741         nla_for_each_attr(nla_opt_key, nla_enc_key,
 742                           nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
 743                 switch (nla_type(nla_opt_key)) {
 744                 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
 745                         option_len = 0;
 746                         key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
 747                         option_len = fl_set_geneve_opt(nla_opt_key, key,
 748                                                        key_depth, option_len,
 749                                                        extack);
 750                         if (option_len < 0)
 751                                 return option_len;
 752
 753                         key->enc_opts.len += option_len;
 754                         /* At the same time we need to parse through the mask
 755                          * in order to verify exact and mask attribute lengths.
 756                          */
 757                         mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
 758                         option_len = fl_set_geneve_opt(nla_opt_msk, mask,
 759                                                        msk_depth, option_len,
 760                                                        extack);
 761                         if (option_len < 0)
 762                                 return option_len;
 763
 764                         mask->enc_opts.len += option_len;
 765                         if (key->enc_opts.len != mask->enc_opts.len) {
 766                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
 767                                 return -EINVAL;
 768                         }
 769
 770                         if (msk_depth)
 771                                 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
 772                         break;
 773                 default:
 774                         NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
 775                         return -EINVAL;
 776                 }
 777         }
 778
 779         return 0;
 780 }
 781
 782 static int fl_set_key(struct net *net, struct nlattr **tb,
 783                       struct fl_flow_key *key, struct fl_flow_key *mask,
 784                       struct netlink_ext_ack *extack)
 785 {
 786         __be16 ethertype;
 787         int ret = 0;
 788 #ifdef CONFIG_NET_CLS_IND
 789         if (tb[TCA_FLOWER_INDEV]) {
 790                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
 791                 if (err < 0)
 792                         return err;
 793                 key->indev_ifindex = err;
 794                 mask->indev_ifindex = 0xffffffff;
 795         }
 796 #endif
 797
 798         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 799                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 800                        sizeof(key->eth.dst));
 801         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 802                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 803                        sizeof(key->eth.src));
 804
 805         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 806                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 807
 808                 if (eth_type_vlan(ethertype)) {
 809                         fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
 810                                         TCA_FLOWER_KEY_VLAN_PRIO,
 811                                         TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 812                                         &key->vlan, &mask->vlan);
 813
 814                         if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
 815                                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
 816                                 if (eth_type_vlan(ethertype)) {
 817                                         fl_set_key_vlan(tb, ethertype,
 818                                                         TCA_FLOWER_KEY_CVLAN_ID,
 819                                                         TCA_FLOWER_KEY_CVLAN_PRIO,
 820                                                         TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
 821                                                         &key->cvlan, &mask->cvlan);
 822                                         fl_set_key_val(tb, &key->basic.n_proto,
 823                                                        TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
 824                                                        &mask->basic.n_proto,
 825                                                        TCA_FLOWER_UNSPEC,
 826                                                        sizeof(key->basic.n_proto));
 827                                 } else {
 828                                         key->basic.n_proto = ethertype;
 829                                         mask->basic.n_proto = cpu_to_be16(~0);
 830                                 }
 831                         }
 832                 } else {
 833                         key->basic.n_proto = ethertype;
 834                         mask->basic.n_proto = cpu_to_be16(~0);
 835                 }
 836         }
 837
 838         if (key->basic.n_proto == htons(ETH_P_IP) ||
 839             key->basic.n_proto == htons(ETH_P_IPV6)) {
 840                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 841                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 842                                sizeof(key->basic.ip_proto));
 843                 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
 844         }
 845
 846         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 847                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 848                 mask->control.addr_type = ~0;
 849                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 850                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 851                                sizeof(key->ipv4.src));
 852                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 853                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 854                                sizeof(key->ipv4.dst));
 855         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 856                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 857                 mask->control.addr_type = ~0;
 858                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 859                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 860                                sizeof(key->ipv6.src));
 861                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 862                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 863                                sizeof(key->ipv6.dst));
 864         }
 865
 866         if (key->basic.ip_proto == IPPROTO_TCP) {
 867                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 868                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 869                                sizeof(key->tp.src));
 870                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 871                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 872                                sizeof(key->tp.dst));
 873                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
 874                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
 875                                sizeof(key->tcp.flags));
 876         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 877                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 878                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 879                                sizeof(key->tp.src));
 880                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 881                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 882                                sizeof(key->tp.dst));
 883         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 884                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 885                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 886                                sizeof(key->tp.src));
 887                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 888                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 889                                sizeof(key->tp.dst));
 890         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
 891                    key->basic.ip_proto == IPPROTO_ICMP) {
 892                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
 893                                &mask->icmp.type,
 894                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
 895                                sizeof(key->icmp.type));
 896                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
 897                                &mask->icmp.code,
 898                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
 899                                sizeof(key->icmp.code));
 900         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
 901                    key->basic.ip_proto == IPPROTO_ICMPV6) {
 902                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
 903                                &mask->icmp.type,
 904                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
 905                                sizeof(key->icmp.type));
 906                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
 907                                &mask->icmp.code,
 908                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
 909                                sizeof(key->icmp.code));
 910         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
 911                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
 912                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
 913                 if (ret)
 914                         return ret;
 915         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
 916                    key->basic.n_proto == htons(ETH_P_RARP)) {
 917                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
 918                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
 919                                sizeof(key->arp.sip));
 920                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
 921                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
 922                                sizeof(key->arp.tip));
 923                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
 924                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
 925                                sizeof(key->arp.op));
 926                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
 927                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
 928                                sizeof(key->arp.sha));
 929                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
 930                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
 931                                sizeof(key->arp.tha));
 932         }
 933
 934         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
 935             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
 936                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 937                 mask->enc_control.addr_type = ~0;
 938                 fl_set_key_val(tb, &key->enc_ipv4.src,
 939                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
 940                                &mask->enc_ipv4.src,
 941                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 942                                sizeof(key->enc_ipv4.src));
 943                 fl_set_key_val(tb, &key->enc_ipv4.dst,
 944                                TCA_FLOWER_KEY_ENC_IPV4_DST,
 945                                &mask->enc_ipv4.dst,
 946                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 947                                sizeof(key->enc_ipv4.dst));
 948         }
 949
 950         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
 951             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
 952                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 953                 mask->enc_control.addr_type = ~0;
 954                 fl_set_key_val(tb, &key->enc_ipv6.src,
 955                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
 956                                &mask->enc_ipv6.src,
 957                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 958                                sizeof(key->enc_ipv6.src));
 959                 fl_set_key_val(tb, &key->enc_ipv6.dst,
 960                                TCA_FLOWER_KEY_ENC_IPV6_DST,
 961                                &mask->enc_ipv6.dst,
 962                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 963                                sizeof(key->enc_ipv6.dst));
 964         }
 965
 966         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
 967                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
 968                        sizeof(key->enc_key_id.keyid));
 969
 970         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 971                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 972                        sizeof(key->enc_tp.src));
 973
 974         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 975                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 976                        sizeof(key->enc_tp.dst));
 977
 978         fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
 979
 980         if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
 981                 ret = fl_set_enc_opt(tb, key, mask, extack);
 982                 if (ret)
 983                         return ret;
 984         }
 985
 986         if (tb[TCA_FLOWER_KEY_FLAGS])
 987                 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
 988
 989         return ret;
 990 }
 991
 992 static void fl_mask_copy(struct fl_flow_mask *dst,
 993                          struct fl_flow_mask *src)
 994 {
 995         const void *psrc = fl_key_get_start(&src->key, src);
 996         void *pdst = fl_key_get_start(&dst->key, src);
 997
 998         memcpy(pdst, psrc, fl_mask_range(src));
 999         dst->range = src->range;
1000 }
1001
1002 static const struct rhashtable_params fl_ht_params = {
1003         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1004         .head_offset = offsetof(struct cls_fl_filter, ht_node),
1005         .automatic_shrinking = true,
1006 };
1007
1008 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1009 {
1010         mask->filter_ht_params = fl_ht_params;
1011         mask->filter_ht_params.key_len = fl_mask_range(mask);
1012         mask->filter_ht_params.key_offset += mask->range.start;
1013
1014         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1015 }
1016
1017 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1018 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
1019
1020 #define FL_KEY_IS_MASKED(mask, member)                                          \
1021         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
1022                    0, FL_KEY_MEMBER_SIZE(member))                               \
1023
1024 #define FL_KEY_SET(keys, cnt, id, member)                                       \
1025         do {                                                                    \
1026                 keys[cnt].key_id = id;                                          \
1027                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
1028                 cnt++;                                                          \
1029         } while(0);
1030
1031 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
1032         do {                                                                    \
1033                 if (FL_KEY_IS_MASKED(mask, member))                             \
1034                         FL_KEY_SET(keys, cnt, id, member);                      \
1035         } while(0);
1036
1037 static void fl_init_dissector(struct flow_dissector *dissector,
1038                               struct fl_flow_key *mask)
1039 {
1040         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1041         size_t cnt = 0;
1042
1043         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1044         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1045         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1046                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1047         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1048                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1049         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1050                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1051         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1052                              FLOW_DISSECTOR_KEY_PORTS, tp);
1053         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1054                              FLOW_DISSECTOR_KEY_IP, ip);
1055         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1056                              FLOW_DISSECTOR_KEY_TCP, tcp);
1057         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1058                              FLOW_DISSECTOR_KEY_ICMP, icmp);
1059         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1060                              FLOW_DISSECTOR_KEY_ARP, arp);
1061         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1062                              FLOW_DISSECTOR_KEY_MPLS, mpls);
1063         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1064                              FLOW_DISSECTOR_KEY_VLAN, vlan);
1065         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1066                              FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1067         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1068                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1069         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1070                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1071         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1072                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1073         if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1074             FL_KEY_IS_MASKED(mask, enc_ipv6))
1075                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1076                            enc_control);
1077         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1078                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1079         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1080                              FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1081         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1082                              FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1083
1084         skb_flow_dissector_init(dissector, keys, cnt);
1085 }
1086
1087 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1088                                                struct fl_flow_mask *mask)
1089 {
1090         struct fl_flow_mask *newmask;
1091         int err;
1092
1093         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1094         if (!newmask)
1095                 return ERR_PTR(-ENOMEM);
1096
1097         fl_mask_copy(newmask, mask);
1098
1099         err = fl_init_mask_hashtable(newmask);
1100         if (err)
1101                 goto errout_free;
1102
1103         fl_init_dissector(&newmask->dissector, &newmask->key);
1104
1105         INIT_LIST_HEAD_RCU(&newmask->filters);
1106
1107         err = rhashtable_insert_fast(&head->ht, &newmask->ht_node,
1108                                      mask_ht_params);
1109         if (err)
1110                 goto errout_destroy;
1111
1112         list_add_tail_rcu(&newmask->list, &head->masks);
1113
1114         return newmask;
1115
1116 errout_destroy:
1117         rhashtable_destroy(&newmask->ht);
1118 errout_free:
1119         kfree(newmask);
1120
1121         return ERR_PTR(err);
1122 }
1123
1124 static int fl_check_assign_mask(struct cls_fl_head *head,
1125                                 struct cls_fl_filter *fnew,
1126                                 struct cls_fl_filter *fold,
1127                                 struct fl_flow_mask *mask)
1128 {
1129         struct fl_flow_mask *newmask;
1130
1131         fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params);
1132         if (!fnew->mask) {
1133                 if (fold)
1134                         return -EINVAL;
1135
1136                 newmask = fl_create_new_mask(head, mask);
1137                 if (IS_ERR(newmask))
1138                         return PTR_ERR(newmask);
1139
1140                 fnew->mask = newmask;
1141         } else if (fold && fold->mask != fnew->mask) {
1142                 return -EINVAL;
1143         }
1144
1145         return 0;
1146 }
1147
1148 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1149                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
1150                         unsigned long base, struct nlattr **tb,
1151                         struct nlattr *est, bool ovr,
1152                         struct fl_flow_tmplt *tmplt,
1153                         struct netlink_ext_ack *extack)
1154 {
1155         int err;
1156
1157         err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
1158         if (err < 0)
1159                 return err;
1160
1161         if (tb[TCA_FLOWER_CLASSID]) {
1162                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1163                 tcf_bind_filter(tp, &f->res, base);
1164         }
1165
1166         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1167         if (err)
1168                 return err;
1169
1170         fl_mask_update_range(mask);
1171         fl_set_masked_key(&f->mkey, &f->key, mask);
1172
1173         if (!fl_mask_fits_tmplt(tmplt, mask)) {
1174                 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1175                 return -EINVAL;
1176         }
1177
1178         return 0;
1179 }
1180
1181 static int fl_change(struct net *net, struct sk_buff *in_skb,
1182                      struct tcf_proto *tp, unsigned long base,
1183                      u32 handle, struct nlattr **tca,
1184                      void **arg, bool ovr, struct netlink_ext_ack *extack)
1185 {
1186         struct cls_fl_head *head = rtnl_dereference(tp->root);
1187         struct cls_fl_filter *fold = *arg;
1188         struct cls_fl_filter *fnew;
1189         struct fl_flow_mask *mask;
1190         struct nlattr **tb;
1191         int err;
1192
1193         if (!tca[TCA_OPTIONS])
1194                 return -EINVAL;
1195
1196         mask = kzalloc(sizeof(struct fl_flow_mask), GFP_KERNEL);
1197         if (!mask)
1198                 return -ENOBUFS;
1199
1200         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1201         if (!tb) {
1202                 err = -ENOBUFS;
1203                 goto errout_mask_alloc;
1204         }
1205
1206         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
1207                                fl_policy, NULL);
1208         if (err < 0)
1209                 goto errout_tb;
1210
1211         if (fold && handle && fold->handle != handle) {
1212                 err = -EINVAL;
1213                 goto errout_tb;
1214         }
1215
1216         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
1217         if (!fnew) {
1218                 err = -ENOBUFS;
1219                 goto errout_tb;
1220         }
1221
1222         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
1223         if (err < 0)
1224                 goto errout;
1225
1226         if (tb[TCA_FLOWER_FLAGS]) {
1227                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
1228
1229                 if (!tc_flags_valid(fnew->flags)) {
1230                         err = -EINVAL;
1231                         goto errout;
1232                 }
1233         }
1234
1235         err = fl_set_parms(net, tp, fnew, mask, base, tb, tca[TCA_RATE], ovr,
1236                            tp->chain->tmplt_priv, extack);
1237         if (err)
1238                 goto errout;
1239
1240         err = fl_check_assign_mask(head, fnew, fold, mask);
1241         if (err)
1242                 goto errout;
1243
1244         if (!handle) {
1245                 handle = 1;
1246                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1247                                     INT_MAX, GFP_KERNEL);
1248         } else if (!fold) {
1249                 /* user specifies a handle and it doesn't exist */
1250                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1251                                     handle, GFP_KERNEL);
1252         }
1253         if (err)
1254                 goto errout_mask;
1255         fnew->handle = handle;
1256
1257         if (!tc_skip_sw(fnew->flags)) {
1258                 if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) {
1259                         err = -EEXIST;
1260                         goto errout_idr;
1261                 }
1262
1263                 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node,
1264                                              fnew->mask->filter_ht_params);
1265                 if (err)
1266                         goto errout_idr;
1267         }
1268
1269         if (!tc_skip_hw(fnew->flags)) {
1270                 err = fl_hw_replace_filter(tp, fnew, extack);
1271                 if (err)
1272                         goto errout_mask;
1273         }
1274
1275         if (!tc_in_hw(fnew->flags))
1276                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1277
1278         if (fold) {
1279                 if (!tc_skip_sw(fold->flags))
1280                         rhashtable_remove_fast(&fold->mask->ht,
1281                                                &fold->ht_node,
1282                                                fold->mask->filter_ht_params);
1283                 if (!tc_skip_hw(fold->flags))
1284                         fl_hw_destroy_filter(tp, fold, NULL);
1285         }
1286
1287         *arg = fnew;
1288
1289         if (fold) {
1290                 idr_replace(&head->handle_idr, fnew, fnew->handle);
1291                 list_replace_rcu(&fold->list, &fnew->list);
1292                 tcf_unbind_filter(tp, &fold->res);
1293                 tcf_exts_get_net(&fold->exts);
1294                 tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
1295         } else {
1296                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1297         }
1298
1299         kfree(tb);
1300         kfree(mask);
1301         return 0;
1302
1303 errout_idr:
1304         if (!fold)
1305                 idr_remove(&head->handle_idr, fnew->handle);
1306
1307 errout_mask:
1308         fl_mask_put(head, fnew->mask, false);
1309
1310 errout:
1311         tcf_exts_destroy(&fnew->exts);
1312         kfree(fnew);
1313 errout_tb:
1314         kfree(tb);
1315 errout_mask_alloc:
1316         kfree(mask);
1317         return err;
1318 }
1319
1320 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1321                      struct netlink_ext_ack *extack)
1322 {
1323         struct cls_fl_head *head = rtnl_dereference(tp->root);
1324         struct cls_fl_filter *f = arg;
1325
1326         if (!tc_skip_sw(f->flags))
1327                 rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
1328                                        f->mask->filter_ht_params);
1329         __fl_delete(tp, f, extack);
1330         *last = list_empty(&head->masks);
1331         return 0;
1332 }
1333
1334 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1335 {
1336         struct cls_fl_head *head = rtnl_dereference(tp->root);
1337         struct cls_fl_filter *f;
1338
1339         arg->count = arg->skip;
1340
1341         while ((f = idr_get_next_ul(&head->handle_idr,
1342                                     &arg->cookie)) != NULL) {
1343                 if (arg->fn(tp, f, arg) < 0) {
1344                         arg->stop = 1;
1345                         break;
1346                 }
1347                 arg->cookie = f->handle + 1;
1348                 arg->count++;
1349         }
1350 }
1351
1352 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
1353                         void *cb_priv, struct netlink_ext_ack *extack)
1354 {
1355         struct cls_fl_head *head = rtnl_dereference(tp->root);
1356         struct tc_cls_flower_offload cls_flower = {};
1357         struct tcf_block *block = tp->chain->block;
1358         struct fl_flow_mask *mask;
1359         struct cls_fl_filter *f;
1360         int err;
1361
1362         list_for_each_entry(mask, &head->masks, list) {
1363                 list_for_each_entry(f, &mask->filters, list) {
1364                         if (tc_skip_hw(f->flags))
1365                                 continue;
1366
1367                         tc_cls_common_offload_init(&cls_flower.common, tp,
1368                                                    f->flags, extack);
1369                         cls_flower.command = add ?
1370                                 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY;
1371                         cls_flower.cookie = (unsigned long)f;
1372                         cls_flower.dissector = &mask->dissector;
1373                         cls_flower.mask = &mask->key;
1374                         cls_flower.key = &f->mkey;
1375                         cls_flower.exts = &f->exts;
1376                         cls_flower.classid = f->res.classid;
1377
1378                         err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);
1379                         if (err) {
1380                                 if (add && tc_skip_sw(f->flags))
1381                                         return err;
1382                                 continue;
1383                         }
1384
1385                         tc_cls_offload_cnt_update(block, &f->in_hw_count,
1386                                                   &f->flags, add);
1387                 }
1388         }
1389
1390         return 0;
1391 }
1392
1393 static void fl_hw_create_tmplt(struct tcf_chain *chain,
1394                                struct fl_flow_tmplt *tmplt)
1395 {
1396         struct tc_cls_flower_offload cls_flower = {};
1397         struct tcf_block *block = chain->block;
1398         struct tcf_exts dummy_exts = { 0, };
1399
1400         cls_flower.common.chain_index = chain->index;
1401         cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE;
1402         cls_flower.cookie = (unsigned long) tmplt;
1403         cls_flower.dissector = &tmplt->dissector;
1404         cls_flower.mask = &tmplt->mask;
1405         cls_flower.key = &tmplt->dummy_key;
1406         cls_flower.exts = &dummy_exts;
1407
1408         /* We don't care if driver (any of them) fails to handle this
1409          * call. It serves just as a hint for it.
1410          */
1411         tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER,
1412                          &cls_flower, false);
1413 }
1414
1415 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
1416                                 struct fl_flow_tmplt *tmplt)
1417 {
1418         struct tc_cls_flower_offload cls_flower = {};
1419         struct tcf_block *block = chain->block;
1420
1421         cls_flower.common.chain_index = chain->index;
1422         cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY;
1423         cls_flower.cookie = (unsigned long) tmplt;
1424
1425         tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER,
1426                          &cls_flower, false);
1427 }
1428
1429 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
1430                              struct nlattr **tca,
1431                              struct netlink_ext_ack *extack)
1432 {
1433         struct fl_flow_tmplt *tmplt;
1434         struct nlattr **tb;
1435         int err;
1436
1437         if (!tca[TCA_OPTIONS])
1438                 return ERR_PTR(-EINVAL);
1439
1440         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1441         if (!tb)
1442                 return ERR_PTR(-ENOBUFS);
1443         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
1444                                fl_policy, NULL);
1445         if (err)
1446                 goto errout_tb;
1447
1448         tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
1449         if (!tmplt) {
1450                 err = -ENOMEM;
1451                 goto errout_tb;
1452         }
1453         tmplt->chain = chain;
1454         err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
1455         if (err)
1456                 goto errout_tmplt;
1457         kfree(tb);
1458
1459         fl_init_dissector(&tmplt->dissector, &tmplt->mask);
1460
1461         fl_hw_create_tmplt(chain, tmplt);
1462
1463         return tmplt;
1464
1465 errout_tmplt:
1466         kfree(tmplt);
1467 errout_tb:
1468         kfree(tb);
1469         return ERR_PTR(err);
1470 }
1471
1472 static void fl_tmplt_destroy(void *tmplt_priv)
1473 {
1474         struct fl_flow_tmplt *tmplt = tmplt_priv;
1475
1476         fl_hw_destroy_tmplt(tmplt->chain, tmplt);
1477         kfree(tmplt);
1478 }
1479
1480 static int fl_dump_key_val(struct sk_buff *skb,
1481                            void *val, int val_type,
1482                            void *mask, int mask_type, int len)
1483 {
1484         int err;
1485
1486         if (!memchr_inv(mask, 0, len))
1487                 return 0;
1488         err = nla_put(skb, val_type, len, val);
1489         if (err)
1490                 return err;
1491         if (mask_type != TCA_FLOWER_UNSPEC) {
1492                 err = nla_put(skb, mask_type, len, mask);
1493                 if (err)
1494                         return err;
1495         }
1496         return 0;
1497 }
1498
1499 static int fl_dump_key_mpls(struct sk_buff *skb,
1500                             struct flow_dissector_key_mpls *mpls_key,
1501                             struct flow_dissector_key_mpls *mpls_mask)
1502 {
1503         int err;
1504
1505         if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1506                 return 0;
1507         if (mpls_mask->mpls_ttl) {
1508                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1509                                  mpls_key->mpls_ttl);
1510                 if (err)
1511                         return err;
1512         }
1513         if (mpls_mask->mpls_tc) {
1514                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1515                                  mpls_key->mpls_tc);
1516                 if (err)
1517                         return err;
1518         }
1519         if (mpls_mask->mpls_label) {
1520                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1521                                   mpls_key->mpls_label);
1522                 if (err)
1523                         return err;
1524         }
1525         if (mpls_mask->mpls_bos) {
1526                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1527                                  mpls_key->mpls_bos);
1528                 if (err)
1529                         return err;
1530         }
1531         return 0;
1532 }
1533
1534 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
1535                           struct flow_dissector_key_ip *key,
1536                           struct flow_dissector_key_ip *mask)
1537 {
1538         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1539         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1540         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1541         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1542
1543         if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
1544             fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
1545                 return -1;
1546
1547         return 0;
1548 }
1549
1550 static int fl_dump_key_vlan(struct sk_buff *skb,
1551                             int vlan_id_key, int vlan_prio_key,
1552                             struct flow_dissector_key_vlan *vlan_key,
1553                             struct flow_dissector_key_vlan *vlan_mask)
1554 {
1555         int err;
1556
1557         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1558                 return 0;
1559         if (vlan_mask->vlan_id) {
1560                 err = nla_put_u16(skb, vlan_id_key,
1561                                   vlan_key->vlan_id);
1562                 if (err)
1563                         return err;
1564         }
1565         if (vlan_mask->vlan_priority) {
1566                 err = nla_put_u8(skb, vlan_prio_key,
1567                                  vlan_key->vlan_priority);
1568                 if (err)
1569                         return err;
1570         }
1571         return 0;
1572 }
1573
1574 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1575                             u32 *flower_key, u32 *flower_mask,
1576                             u32 flower_flag_bit, u32 dissector_flag_bit)
1577 {
1578         if (dissector_mask & dissector_flag_bit) {
1579                 *flower_mask |= flower_flag_bit;
1580                 if (dissector_key & dissector_flag_bit)
1581                         *flower_key |= flower_flag_bit;
1582         }
1583 }
1584
1585 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1586 {
1587         u32 key, mask;
1588         __be32 _key, _mask;
1589         int err;
1590
1591         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1592                 return 0;
1593
1594         key = 0;
1595         mask = 0;
1596
1597         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1598                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1599         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1600                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1601                         FLOW_DIS_FIRST_FRAG);
1602
1603         _key = cpu_to_be32(key);
1604         _mask = cpu_to_be32(mask);
1605
1606         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1607         if (err)
1608                 return err;
1609
1610         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1611 }
1612
1613 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
1614                                   struct flow_dissector_key_enc_opts *enc_opts)
1615 {
1616         struct geneve_opt *opt;
1617         struct nlattr *nest;
1618         int opt_off = 0;
1619
1620         nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
1621         if (!nest)
1622                 goto nla_put_failure;
1623
1624         while (enc_opts->len > opt_off) {
1625                 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
1626
1627                 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
1628                                  opt->opt_class))
1629                         goto nla_put_failure;
1630                 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
1631                                opt->type))
1632                         goto nla_put_failure;
1633                 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
1634                             opt->length * 4, opt->opt_data))
1635                         goto nla_put_failure;
1636
1637                 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
1638         }
1639         nla_nest_end(skb, nest);
1640         return 0;
1641
1642 nla_put_failure:
1643         nla_nest_cancel(skb, nest);
1644         return -EMSGSIZE;
1645 }
1646
1647 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
1648                                struct flow_dissector_key_enc_opts *enc_opts)
1649 {
1650         struct nlattr *nest;
1651         int err;
1652
1653         if (!enc_opts->len)
1654                 return 0;
1655
1656         nest = nla_nest_start(skb, enc_opt_type);
1657         if (!nest)
1658                 goto nla_put_failure;
1659
1660         switch (enc_opts->dst_opt_type) {
1661         case TUNNEL_GENEVE_OPT:
1662                 err = fl_dump_key_geneve_opt(skb, enc_opts);
1663                 if (err)
1664                         goto nla_put_failure;
1665                 break;
1666         default:
1667                 goto nla_put_failure;
1668         }
1669         nla_nest_end(skb, nest);
1670         return 0;
1671
1672 nla_put_failure:
1673         nla_nest_cancel(skb, nest);
1674         return -EMSGSIZE;
1675 }
1676
1677 static int fl_dump_key_enc_opt(struct sk_buff *skb,
1678                                struct flow_dissector_key_enc_opts *key_opts,
1679                                struct flow_dissector_key_enc_opts *msk_opts)
1680 {
1681         int err;
1682
1683         err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
1684         if (err)
1685                 return err;
1686
1687         return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
1688 }
1689
1690 static int fl_dump_key(struct sk_buff *skb, struct net *net,
1691                        struct fl_flow_key *key, struct fl_flow_key *mask)
1692 {
1693         if (mask->indev_ifindex) {
1694                 struct net_device *dev;
1695
1696                 dev = __dev_get_by_index(net, key->indev_ifindex);
1697                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1698                         goto nla_put_failure;
1699         }
1700
1701         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1702                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1703                             sizeof(key->eth.dst)) ||
1704             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1705                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1706                             sizeof(key->eth.src)) ||
1707             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1708                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1709                             sizeof(key->basic.n_proto)))
1710                 goto nla_put_failure;
1711
1712         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1713                 goto nla_put_failure;
1714
1715         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
1716                              TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
1717                 goto nla_put_failure;
1718
1719         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
1720                              TCA_FLOWER_KEY_CVLAN_PRIO,
1721                              &key->cvlan, &mask->cvlan) ||
1722             (mask->cvlan.vlan_tpid &&
1723              nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1724                           key->cvlan.vlan_tpid)))
1725                 goto nla_put_failure;
1726
1727         if (mask->basic.n_proto) {
1728                 if (mask->cvlan.vlan_eth_type) {
1729                         if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1730                                          key->basic.n_proto))
1731                                 goto nla_put_failure;
1732                 } else if (mask->vlan.vlan_eth_type) {
1733                         if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1734                                          key->vlan.vlan_eth_type))
1735                                 goto nla_put_failure;
1736                 }
1737         }
1738
1739         if ((key->basic.n_proto == htons(ETH_P_IP) ||
1740              key->basic.n_proto == htons(ETH_P_IPV6)) &&
1741             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1742                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1743                             sizeof(key->basic.ip_proto)) ||
1744             fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
1745                 goto nla_put_failure;
1746
1747         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1748             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1749                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1750                              sizeof(key->ipv4.src)) ||
1751              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1752                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1753                              sizeof(key->ipv4.dst))))
1754                 goto nla_put_failure;
1755         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1756                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1757                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1758                                   sizeof(key->ipv6.src)) ||
1759                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1760                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1761                                   sizeof(key->ipv6.dst))))
1762                 goto nla_put_failure;
1763
1764         if (key->basic.ip_proto == IPPROTO_TCP &&
1765             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1766                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1767                              sizeof(key->tp.src)) ||
1768              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1769                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1770                              sizeof(key->tp.dst)) ||
1771              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1772                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1773                              sizeof(key->tcp.flags))))
1774                 goto nla_put_failure;
1775         else if (key->basic.ip_proto == IPPROTO_UDP &&
1776                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1777                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1778                                   sizeof(key->tp.src)) ||
1779                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1780                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1781                                   sizeof(key->tp.dst))))
1782                 goto nla_put_failure;
1783         else if (key->basic.ip_proto == IPPROTO_SCTP &&
1784                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1785                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1786                                   sizeof(key->tp.src)) ||
1787                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1788                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1789                                   sizeof(key->tp.dst))))
1790                 goto nla_put_failure;
1791         else if (key->basic.n_proto == htons(ETH_P_IP) &&
1792                  key->basic.ip_proto == IPPROTO_ICMP &&
1793                  (fl_dump_key_val(skb, &key->icmp.type,
1794                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1795                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1796                                   sizeof(key->icmp.type)) ||
1797                   fl_dump_key_val(skb, &key->icmp.code,
1798                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1799                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1800                                   sizeof(key->icmp.code))))
1801                 goto nla_put_failure;
1802         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1803                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
1804                  (fl_dump_key_val(skb, &key->icmp.type,
1805                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1806                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1807                                   sizeof(key->icmp.type)) ||
1808                   fl_dump_key_val(skb, &key->icmp.code,
1809                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1810                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1811                                   sizeof(key->icmp.code))))
1812                 goto nla_put_failure;
1813         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1814                   key->basic.n_proto == htons(ETH_P_RARP)) &&
1815                  (fl_dump_key_val(skb, &key->arp.sip,
1816                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1817                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
1818                                   sizeof(key->arp.sip)) ||
1819                   fl_dump_key_val(skb, &key->arp.tip,
1820                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1821                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
1822                                   sizeof(key->arp.tip)) ||
1823                   fl_dump_key_val(skb, &key->arp.op,
1824                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1825                                   TCA_FLOWER_KEY_ARP_OP_MASK,
1826                                   sizeof(key->arp.op)) ||
1827                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1828                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1829                                   sizeof(key->arp.sha)) ||
1830                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1831                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1832                                   sizeof(key->arp.tha))))
1833                 goto nla_put_failure;
1834
1835         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1836             (fl_dump_key_val(skb, &key->enc_ipv4.src,
1837                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1838                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1839                             sizeof(key->enc_ipv4.src)) ||
1840              fl_dump_key_val(skb, &key->enc_ipv4.dst,
1841                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1842                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1843                              sizeof(key->enc_ipv4.dst))))
1844                 goto nla_put_failure;
1845         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1846                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
1847                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1848                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1849                             sizeof(key->enc_ipv6.src)) ||
1850                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
1851                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
1852                                  &mask->enc_ipv6.dst,
1853                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1854                             sizeof(key->enc_ipv6.dst))))
1855                 goto nla_put_failure;
1856
1857         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1858                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1859                             sizeof(key->enc_key_id)) ||
1860             fl_dump_key_val(skb, &key->enc_tp.src,
1861                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1862                             &mask->enc_tp.src,
1863                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1864                             sizeof(key->enc_tp.src)) ||
1865             fl_dump_key_val(skb, &key->enc_tp.dst,
1866                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1867                             &mask->enc_tp.dst,
1868                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1869                             sizeof(key->enc_tp.dst)) ||
1870             fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
1871             fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
1872                 goto nla_put_failure;
1873
1874         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1875                 goto nla_put_failure;
1876
1877         return 0;
1878
1879 nla_put_failure:
1880         return -EMSGSIZE;
1881 }
1882
1883 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1884                    struct sk_buff *skb, struct tcmsg *t)
1885 {
1886         struct cls_fl_filter *f = fh;
1887         struct nlattr *nest;
1888         struct fl_flow_key *key, *mask;
1889
1890         if (!f)
1891                 return skb->len;
1892
1893         t->tcm_handle = f->handle;
1894
1895         nest = nla_nest_start(skb, TCA_OPTIONS);
1896         if (!nest)
1897                 goto nla_put_failure;
1898
1899         if (f->res.classid &&
1900             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1901                 goto nla_put_failure;
1902
1903         key = &f->key;
1904         mask = &f->mask->key;
1905
1906         if (fl_dump_key(skb, net, key, mask))
1907                 goto nla_put_failure;
1908
1909         if (!tc_skip_hw(f->flags))
1910                 fl_hw_update_stats(tp, f);
1911
1912         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1913                 goto nla_put_failure;
1914
1915         if (tcf_exts_dump(skb, &f->exts))
1916                 goto nla_put_failure;
1917
1918         nla_nest_end(skb, nest);
1919
1920         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1921                 goto nla_put_failure;
1922
1923         return skb->len;
1924
1925 nla_put_failure:
1926         nla_nest_cancel(skb, nest);
1927         return -1;
1928 }
1929
1930 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
1931 {
1932         struct fl_flow_tmplt *tmplt = tmplt_priv;
1933         struct fl_flow_key *key, *mask;
1934         struct nlattr *nest;
1935
1936         nest = nla_nest_start(skb, TCA_OPTIONS);
1937         if (!nest)
1938                 goto nla_put_failure;
1939
1940         key = &tmplt->dummy_key;
1941         mask = &tmplt->mask;
1942
1943         if (fl_dump_key(skb, net, key, mask))
1944                 goto nla_put_failure;
1945
1946         nla_nest_end(skb, nest);
1947
1948         return skb->len;
1949
1950 nla_put_failure:
1951         nla_nest_cancel(skb, nest);
1952         return -EMSGSIZE;
1953 }
1954
1955 static void fl_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
1956                           unsigned long base)
1957 {
1958         struct cls_fl_filter *f = fh;
1959
1960         if (f && f->res.classid == classid) {
1961                 if (cl)
1962                         __tcf_bind_filter(q, &f->res, base);
1963                 else
1964                         __tcf_unbind_filter(q, &f->res);
1965         }
1966 }
1967
1968 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1969         .kind           = "flower",
1970         .classify       = fl_classify,
1971         .init           = fl_init,
1972         .destroy        = fl_destroy,
1973         .get            = fl_get,
1974         .change         = fl_change,
1975         .delete         = fl_delete,
1976         .walk           = fl_walk,
1977         .reoffload      = fl_reoffload,
1978         .dump           = fl_dump,
1979         .bind_class     = fl_bind_class,
1980         .tmplt_create   = fl_tmplt_create,
1981         .tmplt_destroy  = fl_tmplt_destroy,
1982         .tmplt_dump     = fl_tmplt_dump,
1983         .owner          = THIS_MODULE,
1984 };
1985
1986 static int __init cls_fl_init(void)
1987 {
1988         return register_tcf_proto_ops(&cls_fl_ops);
1989 }
1990
1991 static void __exit cls_fl_exit(void)
1992 {
1993         unregister_tcf_proto_ops(&cls_fl_ops);
1994 }
1995
1996 module_init(cls_fl_init);
1997 module_exit(cls_fl_exit);
1998
1999 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2000 MODULE_DESCRIPTION("Flower classifier");
2001 MODULE_LICENSE("GPL v2");