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
  17 #include <linux/if_ether.h>
  18 #include <linux/in6.h>
  19 #include <linux/ip.h>
  20
  21 #include <net/sch_generic.h>
  22 #include <net/pkt_cls.h>
  23 #include <net/ip.h>
  24 #include <net/flow_dissector.h>
  25
  26 #include <net/dst.h>
  27 #include <net/dst_metadata.h>
  28
  29 struct fl_flow_key {
  30         int     indev_ifindex;
  31         struct flow_dissector_key_control control;
  32         struct flow_dissector_key_control enc_control;
  33         struct flow_dissector_key_basic basic;
  34         struct flow_dissector_key_eth_addrs eth;
  35         struct flow_dissector_key_vlan vlan;
  36         union {
  37                 struct flow_dissector_key_ipv4_addrs ipv4;
  38                 struct flow_dissector_key_ipv6_addrs ipv6;
  39         };
  40         struct flow_dissector_key_ports tp;
  41         struct flow_dissector_key_keyid enc_key_id;
  42         union {
  43                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  44                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  45         };
  46         struct flow_dissector_key_ports enc_tp;
  47 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  48
  49 struct fl_flow_mask_range {
  50         unsigned short int start;
  51         unsigned short int end;
  52 };
  53
  54 struct fl_flow_mask {
  55         struct fl_flow_key key;
  56         struct fl_flow_mask_range range;
  57         struct rcu_head rcu;
  58 };
  59
  60 struct cls_fl_head {
  61         struct rhashtable ht;
  62         struct fl_flow_mask mask;
  63         struct flow_dissector dissector;
  64         u32 hgen;
  65         bool mask_assigned;
  66         struct list_head filters;
  67         struct rhashtable_params ht_params;
  68         struct rcu_head rcu;
  69 };
  70
  71 struct cls_fl_filter {
  72         struct rhash_head ht_node;
  73         struct fl_flow_key mkey;
  74         struct tcf_exts exts;
  75         struct tcf_result res;
  76         struct fl_flow_key key;
  77         struct list_head list;
  78         u32 handle;
  79         u32 flags;
  80         struct rcu_head rcu;
  81         struct tc_to_netdev tc;
  82         struct net_device *hw_dev;
  83 };
  84
  85 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
  86 {
  87         return mask->range.end - mask->range.start;
  88 }
  89
  90 static void fl_mask_update_range(struct fl_flow_mask *mask)
  91 {
  92         const u8 *bytes = (const u8 *) &mask->key;
  93         size_t size = sizeof(mask->key);
  94         size_t i, first = 0, last = size - 1;
  95
  96         for (i = 0; i < sizeof(mask->key); i++) {
  97                 if (bytes[i]) {
  98                         if (!first && i)
  99                                 first = i;
 100                         last = i;
 101                 }
 102         }
 103         mask->range.start = rounddown(first, sizeof(long));
 104         mask->range.end = roundup(last + 1, sizeof(long));
 105 }
 106
 107 static void *fl_key_get_start(struct fl_flow_key *key,
 108                               const struct fl_flow_mask *mask)
 109 {
 110         return (u8 *) key + mask->range.start;
 111 }
 112
 113 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 114                               struct fl_flow_mask *mask)
 115 {
 116         const long *lkey = fl_key_get_start(key, mask);
 117         const long *lmask = fl_key_get_start(&mask->key, mask);
 118         long *lmkey = fl_key_get_start(mkey, mask);
 119         int i;
 120
 121         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 122                 *lmkey++ = *lkey++ & *lmask++;
 123 }
 124
 125 static void fl_clear_masked_range(struct fl_flow_key *key,
 126                                   struct fl_flow_mask *mask)
 127 {
 128         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 129 }
 130
 131 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 132                        struct tcf_result *res)
 133 {
 134         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 135         struct cls_fl_filter *f;
 136         struct fl_flow_key skb_key;
 137         struct fl_flow_key skb_mkey;
 138         struct ip_tunnel_info *info;
 139
 140         if (!atomic_read(&head->ht.nelems))
 141                 return -1;
 142
 143         fl_clear_masked_range(&skb_key, &head->mask);
 144
 145         info = skb_tunnel_info(skb);
 146         if (info) {
 147                 struct ip_tunnel_key *key = &info->key;
 148
 149                 switch (ip_tunnel_info_af(info)) {
 150                 case AF_INET:
 151                         skb_key.enc_ipv4.src = key->u.ipv4.src;
 152                         skb_key.enc_ipv4.dst = key->u.ipv4.dst;
 153                         break;
 154                 case AF_INET6:
 155                         skb_key.enc_ipv6.src = key->u.ipv6.src;
 156                         skb_key.enc_ipv6.dst = key->u.ipv6.dst;
 157                         break;
 158                 }
 159
 160                 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
 161                 skb_key.enc_tp.src = key->tp_src;
 162                 skb_key.enc_tp.dst = key->tp_dst;
 163         }
 164
 165         skb_key.indev_ifindex = skb->skb_iif;
 166         /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
 167          * so do it rather here.
 168          */
 169         skb_key.basic.n_proto = skb->protocol;
 170         skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
 171
 172         fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
 173
 174         f = rhashtable_lookup_fast(&head->ht,
 175                                    fl_key_get_start(&skb_mkey, &head->mask),
 176                                    head->ht_params);
 177         if (f && !tc_skip_sw(f->flags)) {
 178                 *res = f->res;
 179                 return tcf_exts_exec(skb, &f->exts, res);
 180         }
 181         return -1;
 182 }
 183
 184 static int fl_init(struct tcf_proto *tp)
 185 {
 186         struct cls_fl_head *head;
 187
 188         head = kzalloc(sizeof(*head), GFP_KERNEL);
 189         if (!head)
 190                 return -ENOBUFS;
 191
 192         INIT_LIST_HEAD_RCU(&head->filters);
 193         rcu_assign_pointer(tp->root, head);
 194
 195         return 0;
 196 }
 197
 198 static void fl_destroy_filter(struct rcu_head *head)
 199 {
 200         struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
 201
 202         tcf_exts_destroy(&f->exts);
 203         kfree(f);
 204 }
 205
 206 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
 207 {
 208         struct tc_cls_flower_offload offload = {0};
 209         struct net_device *dev = f->hw_dev;
 210         struct tc_to_netdev *tc = &f->tc;
 211
 212         if (!tc_can_offload(dev, tp))
 213                 return;
 214
 215         offload.command = TC_CLSFLOWER_DESTROY;
 216         offload.cookie = (unsigned long)f;
 217
 218         tc->type = TC_SETUP_CLSFLOWER;
 219         tc->cls_flower = &offload;
 220
 221         dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
 222 }
 223
 224 static int fl_hw_replace_filter(struct tcf_proto *tp,
 225                                 struct flow_dissector *dissector,
 226                                 struct fl_flow_key *mask,
 227                                 struct cls_fl_filter *f)
 228 {
 229         struct net_device *dev = tp->q->dev_queue->dev;
 230         struct tc_cls_flower_offload offload = {0};
 231         struct tc_to_netdev *tc = &f->tc;
 232         int err;
 233
 234         if (!tc_can_offload(dev, tp)) {
 235                 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev))
 236                         return tc_skip_sw(f->flags) ? -EINVAL : 0;
 237                 dev = f->hw_dev;
 238                 tc->egress_dev = true;
 239         } else {
 240                 f->hw_dev = dev;
 241         }
 242
 243         offload.command = TC_CLSFLOWER_REPLACE;
 244         offload.cookie = (unsigned long)f;
 245         offload.dissector = dissector;
 246         offload.mask = mask;
 247         offload.key = &f->key;
 248         offload.exts = &f->exts;
 249
 250         tc->type = TC_SETUP_CLSFLOWER;
 251         tc->cls_flower = &offload;
 252
 253         err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
 254                                             tc);
 255
 256         if (tc_skip_sw(f->flags))
 257                 return err;
 258         return 0;
 259 }
 260
 261 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 262 {
 263         struct tc_cls_flower_offload offload = {0};
 264         struct net_device *dev = f->hw_dev;
 265         struct tc_to_netdev *tc = &f->tc;
 266
 267         if (!tc_can_offload(dev, tp))
 268                 return;
 269
 270         offload.command = TC_CLSFLOWER_STATS;
 271         offload.cookie = (unsigned long)f;
 272         offload.exts = &f->exts;
 273
 274         tc->type = TC_SETUP_CLSFLOWER;
 275         tc->cls_flower = &offload;
 276
 277         dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
 278 }
 279
 280 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
 281 {
 282         list_del_rcu(&f->list);
 283         if (!tc_skip_hw(f->flags))
 284                 fl_hw_destroy_filter(tp, f);
 285         tcf_unbind_filter(tp, &f->res);
 286         call_rcu(&f->rcu, fl_destroy_filter);
 287 }
 288
 289 static bool fl_destroy(struct tcf_proto *tp, bool force)
 290 {
 291         struct cls_fl_head *head = rtnl_dereference(tp->root);
 292         struct cls_fl_filter *f, *next;
 293
 294         if (!force && !list_empty(&head->filters))
 295                 return false;
 296
 297         list_for_each_entry_safe(f, next, &head->filters, list)
 298                 __fl_delete(tp, f);
 299         RCU_INIT_POINTER(tp->root, NULL);
 300         if (head->mask_assigned)
 301                 rhashtable_destroy(&head->ht);
 302         kfree_rcu(head, rcu);
 303         return true;
 304 }
 305
 306 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
 307 {
 308         struct cls_fl_head *head = rtnl_dereference(tp->root);
 309         struct cls_fl_filter *f;
 310
 311         list_for_each_entry(f, &head->filters, list)
 312                 if (f->handle == handle)
 313                         return (unsigned long) f;
 314         return 0;
 315 }
 316
 317 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 318         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 319         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 320         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 321                                             .len = IFNAMSIZ },
 322         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 323         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 324         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 325         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 326         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 327         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 328         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 329         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 330         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 331         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 332         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 333         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 334         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 335         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 336         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 337         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 338         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 339         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 340         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 341         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 342         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 343         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 344         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 345         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 346         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 347         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 348         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 349         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 350         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 351         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 352         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 353         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 354         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 355         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 356         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 357         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 358         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 359         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 360         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 361         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 362         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 363         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 364 };
 365
 366 static void fl_set_key_val(struct nlattr **tb,
 367                            void *val, int val_type,
 368                            void *mask, int mask_type, int len)
 369 {
 370         if (!tb[val_type])
 371                 return;
 372         memcpy(val, nla_data(tb[val_type]), len);
 373         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 374                 memset(mask, 0xff, len);
 375         else
 376                 memcpy(mask, nla_data(tb[mask_type]), len);
 377 }
 378
 379 static void fl_set_key_vlan(struct nlattr **tb,
 380                             struct flow_dissector_key_vlan *key_val,
 381                             struct flow_dissector_key_vlan *key_mask)
 382 {
 383 #define VLAN_PRIORITY_MASK      0x7
 384
 385         if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
 386                 key_val->vlan_id =
 387                         nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
 388                 key_mask->vlan_id = VLAN_VID_MASK;
 389         }
 390         if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
 391                 key_val->vlan_priority =
 392                         nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
 393                         VLAN_PRIORITY_MASK;
 394                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 395         }
 396 }
 397
 398 static int fl_set_key(struct net *net, struct nlattr **tb,
 399                       struct fl_flow_key *key, struct fl_flow_key *mask)
 400 {
 401         __be16 ethertype;
 402 #ifdef CONFIG_NET_CLS_IND
 403         if (tb[TCA_FLOWER_INDEV]) {
 404                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
 405                 if (err < 0)
 406                         return err;
 407                 key->indev_ifindex = err;
 408                 mask->indev_ifindex = 0xffffffff;
 409         }
 410 #endif
 411
 412         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 413                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 414                        sizeof(key->eth.dst));
 415         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 416                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 417                        sizeof(key->eth.src));
 418
 419         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 420                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 421
 422                 if (ethertype == htons(ETH_P_8021Q)) {
 423                         fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
 424                         fl_set_key_val(tb, &key->basic.n_proto,
 425                                        TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 426                                        &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 427                                        sizeof(key->basic.n_proto));
 428                 } else {
 429                         key->basic.n_proto = ethertype;
 430                         mask->basic.n_proto = cpu_to_be16(~0);
 431                 }
 432         }
 433
 434         if (key->basic.n_proto == htons(ETH_P_IP) ||
 435             key->basic.n_proto == htons(ETH_P_IPV6)) {
 436                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 437                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 438                                sizeof(key->basic.ip_proto));
 439         }
 440
 441         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 442                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 443                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 444                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 445                                sizeof(key->ipv4.src));
 446                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 447                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 448                                sizeof(key->ipv4.dst));
 449         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 450                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 451                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 452                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 453                                sizeof(key->ipv6.src));
 454                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 455                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 456                                sizeof(key->ipv6.dst));
 457         }
 458
 459         if (key->basic.ip_proto == IPPROTO_TCP) {
 460                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 461                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 462                                sizeof(key->tp.src));
 463                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 464                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 465                                sizeof(key->tp.dst));
 466         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 467                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 468                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 469                                sizeof(key->tp.src));
 470                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 471                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 472                                sizeof(key->tp.dst));
 473         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 474                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 475                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 476                                sizeof(key->tp.src));
 477                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 478                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 479                                sizeof(key->tp.dst));
 480         }
 481
 482         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
 483             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
 484                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 485                 fl_set_key_val(tb, &key->enc_ipv4.src,
 486                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
 487                                &mask->enc_ipv4.src,
 488                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 489                                sizeof(key->enc_ipv4.src));
 490                 fl_set_key_val(tb, &key->enc_ipv4.dst,
 491                                TCA_FLOWER_KEY_ENC_IPV4_DST,
 492                                &mask->enc_ipv4.dst,
 493                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 494                                sizeof(key->enc_ipv4.dst));
 495         }
 496
 497         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
 498             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
 499                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 500                 fl_set_key_val(tb, &key->enc_ipv6.src,
 501                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
 502                                &mask->enc_ipv6.src,
 503                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 504                                sizeof(key->enc_ipv6.src));
 505                 fl_set_key_val(tb, &key->enc_ipv6.dst,
 506                                TCA_FLOWER_KEY_ENC_IPV6_DST,
 507                                &mask->enc_ipv6.dst,
 508                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 509                                sizeof(key->enc_ipv6.dst));
 510         }
 511
 512         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
 513                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
 514                        sizeof(key->enc_key_id.keyid));
 515
 516         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 517                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 518                        sizeof(key->enc_tp.src));
 519
 520         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 521                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 522                        sizeof(key->enc_tp.dst));
 523
 524         return 0;
 525 }
 526
 527 static bool fl_mask_eq(struct fl_flow_mask *mask1,
 528                        struct fl_flow_mask *mask2)
 529 {
 530         const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
 531         const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
 532
 533         return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
 534                !memcmp(lmask1, lmask2, fl_mask_range(mask1));
 535 }
 536
 537 static const struct rhashtable_params fl_ht_params = {
 538         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
 539         .head_offset = offsetof(struct cls_fl_filter, ht_node),
 540         .automatic_shrinking = true,
 541 };
 542
 543 static int fl_init_hashtable(struct cls_fl_head *head,
 544                              struct fl_flow_mask *mask)
 545 {
 546         head->ht_params = fl_ht_params;
 547         head->ht_params.key_len = fl_mask_range(mask);
 548         head->ht_params.key_offset += mask->range.start;
 549
 550         return rhashtable_init(&head->ht, &head->ht_params);
 551 }
 552
 553 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
 554 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
 555
 556 #define FL_KEY_IS_MASKED(mask, member)                                          \
 557         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
 558                    0, FL_KEY_MEMBER_SIZE(member))                               \
 559
 560 #define FL_KEY_SET(keys, cnt, id, member)                                       \
 561         do {                                                                    \
 562                 keys[cnt].key_id = id;                                          \
 563                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
 564                 cnt++;                                                          \
 565         } while(0);
 566
 567 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
 568         do {                                                                    \
 569                 if (FL_KEY_IS_MASKED(mask, member))                             \
 570                         FL_KEY_SET(keys, cnt, id, member);                      \
 571         } while(0);
 572
 573 static void fl_init_dissector(struct cls_fl_head *head,
 574                               struct fl_flow_mask *mask)
 575 {
 576         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
 577         size_t cnt = 0;
 578
 579         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
 580         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
 581         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 582                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
 583         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 584                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
 585         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 586                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
 587         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 588                              FLOW_DISSECTOR_KEY_PORTS, tp);
 589         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 590                              FLOW_DISSECTOR_KEY_VLAN, vlan);
 591         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 592                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
 593         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 594                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
 595         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 596                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
 597         if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
 598             FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
 599                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
 600                            enc_control);
 601         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 602                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
 603
 604         skb_flow_dissector_init(&head->dissector, keys, cnt);
 605 }
 606
 607 static int fl_check_assign_mask(struct cls_fl_head *head,
 608                                 struct fl_flow_mask *mask)
 609 {
 610         int err;
 611
 612         if (head->mask_assigned) {
 613                 if (!fl_mask_eq(&head->mask, mask))
 614                         return -EINVAL;
 615                 else
 616                         return 0;
 617         }
 618
 619         /* Mask is not assigned yet. So assign it and init hashtable
 620          * according to that.
 621          */
 622         err = fl_init_hashtable(head, mask);
 623         if (err)
 624                 return err;
 625         memcpy(&head->mask, mask, sizeof(head->mask));
 626         head->mask_assigned = true;
 627
 628         fl_init_dissector(head, mask);
 629
 630         return 0;
 631 }
 632
 633 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 634                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
 635                         unsigned long base, struct nlattr **tb,
 636                         struct nlattr *est, bool ovr)
 637 {
 638         struct tcf_exts e;
 639         int err;
 640
 641         err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
 642         if (err < 0)
 643                 return err;
 644         err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
 645         if (err < 0)
 646                 goto errout;
 647
 648         if (tb[TCA_FLOWER_CLASSID]) {
 649                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
 650                 tcf_bind_filter(tp, &f->res, base);
 651         }
 652
 653         err = fl_set_key(net, tb, &f->key, &mask->key);
 654         if (err)
 655                 goto errout;
 656
 657         fl_mask_update_range(mask);
 658         fl_set_masked_key(&f->mkey, &f->key, mask);
 659
 660         tcf_exts_change(tp, &f->exts, &e);
 661
 662         return 0;
 663 errout:
 664         tcf_exts_destroy(&e);
 665         return err;
 666 }
 667
 668 static u32 fl_grab_new_handle(struct tcf_proto *tp,
 669                               struct cls_fl_head *head)
 670 {
 671         unsigned int i = 0x80000000;
 672         u32 handle;
 673
 674         do {
 675                 if (++head->hgen == 0x7FFFFFFF)
 676                         head->hgen = 1;
 677         } while (--i > 0 && fl_get(tp, head->hgen));
 678
 679         if (unlikely(i == 0)) {
 680                 pr_err("Insufficient number of handles\n");
 681                 handle = 0;
 682         } else {
 683                 handle = head->hgen;
 684         }
 685
 686         return handle;
 687 }
 688
 689 static int fl_change(struct net *net, struct sk_buff *in_skb,
 690                      struct tcf_proto *tp, unsigned long base,
 691                      u32 handle, struct nlattr **tca,
 692                      unsigned long *arg, bool ovr)
 693 {
 694         struct cls_fl_head *head = rtnl_dereference(tp->root);
 695         struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
 696         struct cls_fl_filter *fnew;
 697         struct nlattr *tb[TCA_FLOWER_MAX + 1];
 698         struct fl_flow_mask mask = {};
 699         int err;
 700
 701         if (!tca[TCA_OPTIONS])
 702                 return -EINVAL;
 703
 704         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy);
 705         if (err < 0)
 706                 return err;
 707
 708         if (fold && handle && fold->handle != handle)
 709                 return -EINVAL;
 710
 711         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
 712         if (!fnew)
 713                 return -ENOBUFS;
 714
 715         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
 716         if (err < 0)
 717                 goto errout;
 718
 719         if (!handle) {
 720                 handle = fl_grab_new_handle(tp, head);
 721                 if (!handle) {
 722                         err = -EINVAL;
 723                         goto errout;
 724                 }
 725         }
 726         fnew->handle = handle;
 727
 728         if (tb[TCA_FLOWER_FLAGS]) {
 729                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
 730
 731                 if (!tc_flags_valid(fnew->flags)) {
 732                         err = -EINVAL;
 733                         goto errout;
 734                 }
 735         }
 736
 737         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
 738         if (err)
 739                 goto errout;
 740
 741         err = fl_check_assign_mask(head, &mask);
 742         if (err)
 743                 goto errout;
 744
 745         if (!tc_skip_sw(fnew->flags)) {
 746                 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
 747                                              head->ht_params);
 748                 if (err)
 749                         goto errout;
 750         }
 751
 752         if (!tc_skip_hw(fnew->flags)) {
 753                 err = fl_hw_replace_filter(tp,
 754                                            &head->dissector,
 755                                            &mask.key,
 756                                            fnew);
 757                 if (err)
 758                         goto errout;
 759         }
 760
 761         if (fold) {
 762                 rhashtable_remove_fast(&head->ht, &fold->ht_node,
 763                                        head->ht_params);
 764                 if (!tc_skip_hw(fold->flags))
 765                         fl_hw_destroy_filter(tp, fold);
 766         }
 767
 768         *arg = (unsigned long) fnew;
 769
 770         if (fold) {
 771                 list_replace_rcu(&fold->list, &fnew->list);
 772                 tcf_unbind_filter(tp, &fold->res);
 773                 call_rcu(&fold->rcu, fl_destroy_filter);
 774         } else {
 775                 list_add_tail_rcu(&fnew->list, &head->filters);
 776         }
 777
 778         return 0;
 779
 780 errout:
 781         tcf_exts_destroy(&fnew->exts);
 782         kfree(fnew);
 783         return err;
 784 }
 785
 786 static int fl_delete(struct tcf_proto *tp, unsigned long arg)
 787 {
 788         struct cls_fl_head *head = rtnl_dereference(tp->root);
 789         struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
 790
 791         rhashtable_remove_fast(&head->ht, &f->ht_node,
 792                                head->ht_params);
 793         __fl_delete(tp, f);
 794         return 0;
 795 }
 796
 797 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
 798 {
 799         struct cls_fl_head *head = rtnl_dereference(tp->root);
 800         struct cls_fl_filter *f;
 801
 802         list_for_each_entry_rcu(f, &head->filters, list) {
 803                 if (arg->count < arg->skip)
 804                         goto skip;
 805                 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
 806                         arg->stop = 1;
 807                         break;
 808                 }
 809 skip:
 810                 arg->count++;
 811         }
 812 }
 813
 814 static int fl_dump_key_val(struct sk_buff *skb,
 815                            void *val, int val_type,
 816                            void *mask, int mask_type, int len)
 817 {
 818         int err;
 819
 820         if (!memchr_inv(mask, 0, len))
 821                 return 0;
 822         err = nla_put(skb, val_type, len, val);
 823         if (err)
 824                 return err;
 825         if (mask_type != TCA_FLOWER_UNSPEC) {
 826                 err = nla_put(skb, mask_type, len, mask);
 827                 if (err)
 828                         return err;
 829         }
 830         return 0;
 831 }
 832
 833 static int fl_dump_key_vlan(struct sk_buff *skb,
 834                             struct flow_dissector_key_vlan *vlan_key,
 835                             struct flow_dissector_key_vlan *vlan_mask)
 836 {
 837         int err;
 838
 839         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
 840                 return 0;
 841         if (vlan_mask->vlan_id) {
 842                 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
 843                                   vlan_key->vlan_id);
 844                 if (err)
 845                         return err;
 846         }
 847         if (vlan_mask->vlan_priority) {
 848                 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
 849                                  vlan_key->vlan_priority);
 850                 if (err)
 851                         return err;
 852         }
 853         return 0;
 854 }
 855
 856 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
 857                    struct sk_buff *skb, struct tcmsg *t)
 858 {
 859         struct cls_fl_head *head = rtnl_dereference(tp->root);
 860         struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
 861         struct nlattr *nest;
 862         struct fl_flow_key *key, *mask;
 863
 864         if (!f)
 865                 return skb->len;
 866
 867         t->tcm_handle = f->handle;
 868
 869         nest = nla_nest_start(skb, TCA_OPTIONS);
 870         if (!nest)
 871                 goto nla_put_failure;
 872
 873         if (f->res.classid &&
 874             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
 875                 goto nla_put_failure;
 876
 877         key = &f->key;
 878         mask = &head->mask.key;
 879
 880         if (mask->indev_ifindex) {
 881                 struct net_device *dev;
 882
 883                 dev = __dev_get_by_index(net, key->indev_ifindex);
 884                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
 885                         goto nla_put_failure;
 886         }
 887
 888         if (!tc_skip_hw(f->flags))
 889                 fl_hw_update_stats(tp, f);
 890
 891         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 892                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 893                             sizeof(key->eth.dst)) ||
 894             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 895                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 896                             sizeof(key->eth.src)) ||
 897             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
 898                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 899                             sizeof(key->basic.n_proto)))
 900                 goto nla_put_failure;
 901
 902         if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
 903                 goto nla_put_failure;
 904
 905         if ((key->basic.n_proto == htons(ETH_P_IP) ||
 906              key->basic.n_proto == htons(ETH_P_IPV6)) &&
 907             fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 908                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 909                             sizeof(key->basic.ip_proto)))
 910                 goto nla_put_failure;
 911
 912         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
 913             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 914                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 915                              sizeof(key->ipv4.src)) ||
 916              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 917                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 918                              sizeof(key->ipv4.dst))))
 919                 goto nla_put_failure;
 920         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
 921                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 922                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 923                                   sizeof(key->ipv6.src)) ||
 924                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 925                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 926                                   sizeof(key->ipv6.dst))))
 927                 goto nla_put_failure;
 928
 929         if (key->basic.ip_proto == IPPROTO_TCP &&
 930             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 931                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 932                              sizeof(key->tp.src)) ||
 933              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 934                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 935                              sizeof(key->tp.dst))))
 936                 goto nla_put_failure;
 937         else if (key->basic.ip_proto == IPPROTO_UDP &&
 938                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 939                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 940                                   sizeof(key->tp.src)) ||
 941                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 942                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 943                                   sizeof(key->tp.dst))))
 944                 goto nla_put_failure;
 945         else if (key->basic.ip_proto == IPPROTO_SCTP &&
 946                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 947                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 948                                   sizeof(key->tp.src)) ||
 949                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 950                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 951                                   sizeof(key->tp.dst))))
 952                 goto nla_put_failure;
 953
 954         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
 955             (fl_dump_key_val(skb, &key->enc_ipv4.src,
 956                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
 957                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 958                             sizeof(key->enc_ipv4.src)) ||
 959              fl_dump_key_val(skb, &key->enc_ipv4.dst,
 960                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
 961                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 962                              sizeof(key->enc_ipv4.dst))))
 963                 goto nla_put_failure;
 964         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
 965                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
 966                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
 967                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 968                             sizeof(key->enc_ipv6.src)) ||
 969                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
 970                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
 971                                  &mask->enc_ipv6.dst,
 972                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 973                             sizeof(key->enc_ipv6.dst))))
 974                 goto nla_put_failure;
 975
 976         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
 977                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
 978                             sizeof(key->enc_key_id)) ||
 979             fl_dump_key_val(skb, &key->enc_tp.src,
 980                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 981                             &mask->enc_tp.src,
 982                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 983                             sizeof(key->enc_tp.src)) ||
 984             fl_dump_key_val(skb, &key->enc_tp.dst,
 985                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 986                             &mask->enc_tp.dst,
 987                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 988                             sizeof(key->enc_tp.dst)))
 989                 goto nla_put_failure;
 990
 991         nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags);
 992
 993         if (tcf_exts_dump(skb, &f->exts))
 994                 goto nla_put_failure;
 995
 996         nla_nest_end(skb, nest);
 997
 998         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
 999                 goto nla_put_failure;
1000
1001         return skb->len;
1002
1003 nla_put_failure:
1004         nla_nest_cancel(skb, nest);
1005         return -1;
1006 }
1007
1008 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1009         .kind           = "flower",
1010         .classify       = fl_classify,
1011         .init           = fl_init,
1012         .destroy        = fl_destroy,
1013         .get            = fl_get,
1014         .change         = fl_change,
1015         .delete         = fl_delete,
1016         .walk           = fl_walk,
1017         .dump           = fl_dump,
1018         .owner          = THIS_MODULE,
1019 };
1020
1021 static int __init cls_fl_init(void)
1022 {
1023         return register_tcf_proto_ops(&cls_fl_ops);
1024 }
1025
1026 static void __exit cls_fl_exit(void)
1027 {
1028         unregister_tcf_proto_ops(&cls_fl_ops);
1029 }
1030
1031 module_init(cls_fl_init);
1032 module_exit(cls_fl_exit);
1033
1034 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1035 MODULE_DESCRIPTION("Flower classifier");
1036 MODULE_LICENSE("GPL v2");