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
  28 #include <net/dst.h>
  29 #include <net/dst_metadata.h>
  30
  31 struct fl_flow_key {
  32         int     indev_ifindex;
  33         struct flow_dissector_key_control control;
  34         struct flow_dissector_key_control enc_control;
  35         struct flow_dissector_key_basic basic;
  36         struct flow_dissector_key_eth_addrs eth;
  37         struct flow_dissector_key_vlan vlan;
  38         union {
  39                 struct flow_dissector_key_ipv4_addrs ipv4;
  40                 struct flow_dissector_key_ipv6_addrs ipv6;
  41         };
  42         struct flow_dissector_key_ports tp;
  43         struct flow_dissector_key_icmp icmp;
  44         struct flow_dissector_key_arp arp;
  45         struct flow_dissector_key_keyid enc_key_id;
  46         union {
  47                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  48                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  49         };
  50         struct flow_dissector_key_ports enc_tp;
  51         struct flow_dissector_key_mpls mpls;
  52         struct flow_dissector_key_tcp tcp;
  53         struct flow_dissector_key_ip ip;
  54 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  55
  56 struct fl_flow_mask_range {
  57         unsigned short int start;
  58         unsigned short int end;
  59 };
  60
  61 struct fl_flow_mask {
  62         struct fl_flow_key key;
  63         struct fl_flow_mask_range range;
  64         struct rhash_head ht_node;
  65         struct rhashtable ht;
  66         struct rhashtable_params filter_ht_params;
  67         struct flow_dissector dissector;
  68         struct list_head filters;
  69         struct rcu_work rwork;
  70         struct list_head list;
  71 };
  72
  73 struct cls_fl_head {
  74         struct rhashtable ht;
  75         struct list_head masks;
  76         struct rcu_work rwork;
  77         struct idr handle_idr;
  78 };
  79
  80 struct cls_fl_filter {
  81         struct fl_flow_mask *mask;
  82         struct rhash_head ht_node;
  83         struct fl_flow_key mkey;
  84         struct tcf_exts exts;
  85         struct tcf_result res;
  86         struct fl_flow_key key;
  87         struct list_head list;
  88         u32 handle;
  89         u32 flags;
  90         struct rcu_work rwork;
  91         struct net_device *hw_dev;
  92 };
  93
  94 static const struct rhashtable_params mask_ht_params = {
  95         .key_offset = offsetof(struct fl_flow_mask, key),
  96         .key_len = sizeof(struct fl_flow_key),
  97         .head_offset = offsetof(struct fl_flow_mask, ht_node),
  98         .automatic_shrinking = true,
  99 };
 100
 101 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
 102 {
 103         return mask->range.end - mask->range.start;
 104 }
 105
 106 static void fl_mask_update_range(struct fl_flow_mask *mask)
 107 {
 108         const u8 *bytes = (const u8 *) &mask->key;
 109         size_t size = sizeof(mask->key);
 110         size_t i, first = 0, last;
 111
 112         for (i = 0; i < size; i++) {
 113                 if (bytes[i]) {
 114                         first = i;
 115                         break;
 116                 }
 117         }
 118         last = first;
 119         for (i = size - 1; i != first; i--) {
 120                 if (bytes[i]) {
 121                         last = i;
 122                         break;
 123                 }
 124         }
 125         mask->range.start = rounddown(first, sizeof(long));
 126         mask->range.end = roundup(last + 1, sizeof(long));
 127 }
 128
 129 static void *fl_key_get_start(struct fl_flow_key *key,
 130                               const struct fl_flow_mask *mask)
 131 {
 132         return (u8 *) key + mask->range.start;
 133 }
 134
 135 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 136                               struct fl_flow_mask *mask)
 137 {
 138         const long *lkey = fl_key_get_start(key, mask);
 139         const long *lmask = fl_key_get_start(&mask->key, mask);
 140         long *lmkey = fl_key_get_start(mkey, mask);
 141         int i;
 142
 143         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 144                 *lmkey++ = *lkey++ & *lmask++;
 145 }
 146
 147 static void fl_clear_masked_range(struct fl_flow_key *key,
 148                                   struct fl_flow_mask *mask)
 149 {
 150         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 151 }
 152
 153 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask,
 154                                        struct fl_flow_key *mkey)
 155 {
 156         return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
 157                                       mask->filter_ht_params);
 158 }
 159
 160 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 161                        struct tcf_result *res)
 162 {
 163         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 164         struct cls_fl_filter *f;
 165         struct fl_flow_mask *mask;
 166         struct fl_flow_key skb_key;
 167         struct fl_flow_key skb_mkey;
 168
 169         list_for_each_entry_rcu(mask, &head->masks, list) {
 170                 fl_clear_masked_range(&skb_key, mask);
 171
 172                 skb_key.indev_ifindex = skb->skb_iif;
 173                 /* skb_flow_dissect() does not set n_proto in case an unknown
 174                  * protocol, so do it rather here.
 175                  */
 176                 skb_key.basic.n_proto = skb->protocol;
 177                 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
 178                 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
 179
 180                 fl_set_masked_key(&skb_mkey, &skb_key, mask);
 181
 182                 f = fl_lookup(mask, &skb_mkey);
 183                 if (f && !tc_skip_sw(f->flags)) {
 184                         *res = f->res;
 185                         return tcf_exts_exec(skb, &f->exts, res);
 186                 }
 187         }
 188         return -1;
 189 }
 190
 191 static int fl_init(struct tcf_proto *tp)
 192 {
 193         struct cls_fl_head *head;
 194
 195         head = kzalloc(sizeof(*head), GFP_KERNEL);
 196         if (!head)
 197                 return -ENOBUFS;
 198
 199         INIT_LIST_HEAD_RCU(&head->masks);
 200         rcu_assign_pointer(tp->root, head);
 201         idr_init(&head->handle_idr);
 202
 203         return rhashtable_init(&head->ht, &mask_ht_params);
 204 }
 205
 206 static void fl_mask_free(struct fl_flow_mask *mask)
 207 {
 208         rhashtable_destroy(&mask->ht);
 209         kfree(mask);
 210 }
 211
 212 static void fl_mask_free_work(struct work_struct *work)
 213 {
 214         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 215                                                  struct fl_flow_mask, rwork);
 216
 217         fl_mask_free(mask);
 218 }
 219
 220 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask,
 221                         bool async)
 222 {
 223         if (!list_empty(&mask->filters))
 224                 return false;
 225
 226         rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
 227         list_del_rcu(&mask->list);
 228         if (async)
 229                 tcf_queue_work(&mask->rwork, fl_mask_free_work);
 230         else
 231                 fl_mask_free(mask);
 232
 233         return true;
 234 }
 235
 236 static void __fl_destroy_filter(struct cls_fl_filter *f)
 237 {
 238         tcf_exts_destroy(&f->exts);
 239         tcf_exts_put_net(&f->exts);
 240         kfree(f);
 241 }
 242
 243 static void fl_destroy_filter_work(struct work_struct *work)
 244 {
 245         struct cls_fl_filter *f = container_of(to_rcu_work(work),
 246                                         struct cls_fl_filter, rwork);
 247
 248         rtnl_lock();
 249         __fl_destroy_filter(f);
 250         rtnl_unlock();
 251 }
 252
 253 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
 254                                  struct netlink_ext_ack *extack)
 255 {
 256         struct tc_cls_flower_offload cls_flower = {};
 257         struct tcf_block *block = tp->chain->block;
 258
 259         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 260         cls_flower.command = TC_CLSFLOWER_DESTROY;
 261         cls_flower.cookie = (unsigned long) f;
 262
 263         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 264                          &cls_flower, false);
 265         tcf_block_offload_dec(block, &f->flags);
 266 }
 267
 268 static int fl_hw_replace_filter(struct tcf_proto *tp,
 269                                 struct cls_fl_filter *f,
 270                                 struct netlink_ext_ack *extack)
 271 {
 272         struct tc_cls_flower_offload cls_flower = {};
 273         struct tcf_block *block = tp->chain->block;
 274         bool skip_sw = tc_skip_sw(f->flags);
 275         int err;
 276
 277         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 278         cls_flower.command = TC_CLSFLOWER_REPLACE;
 279         cls_flower.cookie = (unsigned long) f;
 280         cls_flower.dissector = &f->mask->dissector;
 281         cls_flower.mask = &f->mask->key;
 282         cls_flower.key = &f->mkey;
 283         cls_flower.exts = &f->exts;
 284         cls_flower.classid = f->res.classid;
 285
 286         err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 287                                &cls_flower, skip_sw);
 288         if (err < 0) {
 289                 fl_hw_destroy_filter(tp, f, NULL);
 290                 return err;
 291         } else if (err > 0) {
 292                 tcf_block_offload_inc(block, &f->flags);
 293         }
 294
 295         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 296                 return -EINVAL;
 297
 298         return 0;
 299 }
 300
 301 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 302 {
 303         struct tc_cls_flower_offload cls_flower = {};
 304         struct tcf_block *block = tp->chain->block;
 305
 306         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
 307         cls_flower.command = TC_CLSFLOWER_STATS;
 308         cls_flower.cookie = (unsigned long) f;
 309         cls_flower.exts = &f->exts;
 310         cls_flower.classid = f->res.classid;
 311
 312         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 313                          &cls_flower, false);
 314 }
 315
 316 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
 317                         struct netlink_ext_ack *extack)
 318 {
 319         struct cls_fl_head *head = rtnl_dereference(tp->root);
 320         bool async = tcf_exts_get_net(&f->exts);
 321         bool last;
 322
 323         idr_remove(&head->handle_idr, f->handle);
 324         list_del_rcu(&f->list);
 325         last = fl_mask_put(head, f->mask, async);
 326         if (!tc_skip_hw(f->flags))
 327                 fl_hw_destroy_filter(tp, f, extack);
 328         tcf_unbind_filter(tp, &f->res);
 329         if (async)
 330                 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
 331         else
 332                 __fl_destroy_filter(f);
 333
 334         return last;
 335 }
 336
 337 static void fl_destroy_sleepable(struct work_struct *work)
 338 {
 339         struct cls_fl_head *head = container_of(to_rcu_work(work),
 340                                                 struct cls_fl_head,
 341                                                 rwork);
 342
 343         rhashtable_destroy(&head->ht);
 344         kfree(head);
 345         module_put(THIS_MODULE);
 346 }
 347
 348 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
 349 {
 350         struct cls_fl_head *head = rtnl_dereference(tp->root);
 351         struct fl_flow_mask *mask, *next_mask;
 352         struct cls_fl_filter *f, *next;
 353
 354         list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
 355                 list_for_each_entry_safe(f, next, &mask->filters, list) {
 356                         if (__fl_delete(tp, f, extack))
 357                                 break;
 358                 }
 359         }
 360         idr_destroy(&head->handle_idr);
 361
 362         __module_get(THIS_MODULE);
 363         tcf_queue_work(&head->rwork, fl_destroy_sleepable);
 364 }
 365
 366 static void *fl_get(struct tcf_proto *tp, u32 handle)
 367 {
 368         struct cls_fl_head *head = rtnl_dereference(tp->root);
 369
 370         return idr_find(&head->handle_idr, handle);
 371 }
 372
 373 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 374         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 375         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 376         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 377                                             .len = IFNAMSIZ },
 378         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 379         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 380         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 381         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 382         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 383         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 384         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 385         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 386         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 387         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 388         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 389         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 390         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 391         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 392         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 393         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 394         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 395         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 396         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 397         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 398         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 399         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 400         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 401         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 402         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 403         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 404         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 405         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 406         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 407         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 408         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 409         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 410         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 411         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 412         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 413         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 414         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 415         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 416         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 417         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 418         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 419         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 420         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 421         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 422         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 423         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 424         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 425         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 426         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 427         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 428         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 429         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 430         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 431         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 432         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 433         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 434         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 435         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 436         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 437         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 438         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 439         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 440         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 441         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 442         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 443         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 444         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 445         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 446         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 447         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 448         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 449         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 450 };
 451
 452 static void fl_set_key_val(struct nlattr **tb,
 453                            void *val, int val_type,
 454                            void *mask, int mask_type, int len)
 455 {
 456         if (!tb[val_type])
 457                 return;
 458         memcpy(val, nla_data(tb[val_type]), len);
 459         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 460                 memset(mask, 0xff, len);
 461         else
 462                 memcpy(mask, nla_data(tb[mask_type]), len);
 463 }
 464
 465 static int fl_set_key_mpls(struct nlattr **tb,
 466                            struct flow_dissector_key_mpls *key_val,
 467                            struct flow_dissector_key_mpls *key_mask)
 468 {
 469         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 470                 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 471                 key_mask->mpls_ttl = MPLS_TTL_MASK;
 472         }
 473         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 474                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 475
 476                 if (bos & ~MPLS_BOS_MASK)
 477                         return -EINVAL;
 478                 key_val->mpls_bos = bos;
 479                 key_mask->mpls_bos = MPLS_BOS_MASK;
 480         }
 481         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
 482                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
 483
 484                 if (tc & ~MPLS_TC_MASK)
 485                         return -EINVAL;
 486                 key_val->mpls_tc = tc;
 487                 key_mask->mpls_tc = MPLS_TC_MASK;
 488         }
 489         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 490                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
 491
 492                 if (label & ~MPLS_LABEL_MASK)
 493                         return -EINVAL;
 494                 key_val->mpls_label = label;
 495                 key_mask->mpls_label = MPLS_LABEL_MASK;
 496         }
 497         return 0;
 498 }
 499
 500 static void fl_set_key_vlan(struct nlattr **tb,
 501                             struct flow_dissector_key_vlan *key_val,
 502                             struct flow_dissector_key_vlan *key_mask)
 503 {
 504 #define VLAN_PRIORITY_MASK      0x7
 505
 506         if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
 507                 key_val->vlan_id =
 508                         nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
 509                 key_mask->vlan_id = VLAN_VID_MASK;
 510         }
 511         if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
 512                 key_val->vlan_priority =
 513                         nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
 514                         VLAN_PRIORITY_MASK;
 515                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 516         }
 517 }
 518
 519 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
 520                             u32 *dissector_key, u32 *dissector_mask,
 521                             u32 flower_flag_bit, u32 dissector_flag_bit)
 522 {
 523         if (flower_mask & flower_flag_bit) {
 524                 *dissector_mask |= dissector_flag_bit;
 525                 if (flower_key & flower_flag_bit)
 526                         *dissector_key |= dissector_flag_bit;
 527         }
 528 }
 529
 530 static int fl_set_key_flags(struct nlattr **tb,
 531                             u32 *flags_key, u32 *flags_mask)
 532 {
 533         u32 key, mask;
 534
 535         /* mask is mandatory for flags */
 536         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
 537                 return -EINVAL;
 538
 539         key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
 540         mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
 541
 542         *flags_key  = 0;
 543         *flags_mask = 0;
 544
 545         fl_set_key_flag(key, mask, flags_key, flags_mask,
 546                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
 547         fl_set_key_flag(key, mask, flags_key, flags_mask,
 548                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
 549                         FLOW_DIS_FIRST_FRAG);
 550
 551         return 0;
 552 }
 553
 554 static void fl_set_key_ip(struct nlattr **tb,
 555                           struct flow_dissector_key_ip *key,
 556                           struct flow_dissector_key_ip *mask)
 557 {
 558                 fl_set_key_val(tb, &key->tos, TCA_FLOWER_KEY_IP_TOS,
 559                                &mask->tos, TCA_FLOWER_KEY_IP_TOS_MASK,
 560                                sizeof(key->tos));
 561
 562                 fl_set_key_val(tb, &key->ttl, TCA_FLOWER_KEY_IP_TTL,
 563                                &mask->ttl, TCA_FLOWER_KEY_IP_TTL_MASK,
 564                                sizeof(key->ttl));
 565 }
 566
 567 static int fl_set_key(struct net *net, struct nlattr **tb,
 568                       struct fl_flow_key *key, struct fl_flow_key *mask,
 569                       struct netlink_ext_ack *extack)
 570 {
 571         __be16 ethertype;
 572         int ret = 0;
 573 #ifdef CONFIG_NET_CLS_IND
 574         if (tb[TCA_FLOWER_INDEV]) {
 575                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
 576                 if (err < 0)
 577                         return err;
 578                 key->indev_ifindex = err;
 579                 mask->indev_ifindex = 0xffffffff;
 580         }
 581 #endif
 582
 583         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 584                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 585                        sizeof(key->eth.dst));
 586         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 587                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 588                        sizeof(key->eth.src));
 589
 590         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 591                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 592
 593                 if (ethertype == htons(ETH_P_8021Q)) {
 594                         fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
 595                         fl_set_key_val(tb, &key->basic.n_proto,
 596                                        TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 597                                        &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 598                                        sizeof(key->basic.n_proto));
 599                 } else {
 600                         key->basic.n_proto = ethertype;
 601                         mask->basic.n_proto = cpu_to_be16(~0);
 602                 }
 603         }
 604
 605         if (key->basic.n_proto == htons(ETH_P_IP) ||
 606             key->basic.n_proto == htons(ETH_P_IPV6)) {
 607                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 608                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 609                                sizeof(key->basic.ip_proto));
 610                 fl_set_key_ip(tb, &key->ip, &mask->ip);
 611         }
 612
 613         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 614                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 615                 mask->control.addr_type = ~0;
 616                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 617                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 618                                sizeof(key->ipv4.src));
 619                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 620                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 621                                sizeof(key->ipv4.dst));
 622         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 623                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 624                 mask->control.addr_type = ~0;
 625                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 626                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 627                                sizeof(key->ipv6.src));
 628                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 629                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 630                                sizeof(key->ipv6.dst));
 631         }
 632
 633         if (key->basic.ip_proto == IPPROTO_TCP) {
 634                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 635                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 636                                sizeof(key->tp.src));
 637                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 638                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 639                                sizeof(key->tp.dst));
 640                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
 641                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
 642                                sizeof(key->tcp.flags));
 643         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 644                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 645                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 646                                sizeof(key->tp.src));
 647                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 648                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 649                                sizeof(key->tp.dst));
 650         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 651                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 652                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 653                                sizeof(key->tp.src));
 654                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 655                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 656                                sizeof(key->tp.dst));
 657         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
 658                    key->basic.ip_proto == IPPROTO_ICMP) {
 659                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
 660                                &mask->icmp.type,
 661                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
 662                                sizeof(key->icmp.type));
 663                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
 664                                &mask->icmp.code,
 665                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
 666                                sizeof(key->icmp.code));
 667         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
 668                    key->basic.ip_proto == IPPROTO_ICMPV6) {
 669                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
 670                                &mask->icmp.type,
 671                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
 672                                sizeof(key->icmp.type));
 673                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
 674                                &mask->icmp.code,
 675                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
 676                                sizeof(key->icmp.code));
 677         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
 678                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
 679                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
 680                 if (ret)
 681                         return ret;
 682         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
 683                    key->basic.n_proto == htons(ETH_P_RARP)) {
 684                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
 685                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
 686                                sizeof(key->arp.sip));
 687                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
 688                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
 689                                sizeof(key->arp.tip));
 690                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
 691                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
 692                                sizeof(key->arp.op));
 693                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
 694                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
 695                                sizeof(key->arp.sha));
 696                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
 697                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
 698                                sizeof(key->arp.tha));
 699         }
 700
 701         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
 702             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
 703                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 704                 mask->enc_control.addr_type = ~0;
 705                 fl_set_key_val(tb, &key->enc_ipv4.src,
 706                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
 707                                &mask->enc_ipv4.src,
 708                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 709                                sizeof(key->enc_ipv4.src));
 710                 fl_set_key_val(tb, &key->enc_ipv4.dst,
 711                                TCA_FLOWER_KEY_ENC_IPV4_DST,
 712                                &mask->enc_ipv4.dst,
 713                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 714                                sizeof(key->enc_ipv4.dst));
 715         }
 716
 717         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
 718             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
 719                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 720                 mask->enc_control.addr_type = ~0;
 721                 fl_set_key_val(tb, &key->enc_ipv6.src,
 722                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
 723                                &mask->enc_ipv6.src,
 724                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 725                                sizeof(key->enc_ipv6.src));
 726                 fl_set_key_val(tb, &key->enc_ipv6.dst,
 727                                TCA_FLOWER_KEY_ENC_IPV6_DST,
 728                                &mask->enc_ipv6.dst,
 729                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 730                                sizeof(key->enc_ipv6.dst));
 731         }
 732
 733         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
 734                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
 735                        sizeof(key->enc_key_id.keyid));
 736
 737         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 738                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 739                        sizeof(key->enc_tp.src));
 740
 741         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 742                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 743                        sizeof(key->enc_tp.dst));
 744
 745         if (tb[TCA_FLOWER_KEY_FLAGS])
 746                 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
 747
 748         return ret;
 749 }
 750
 751 static void fl_mask_copy(struct fl_flow_mask *dst,
 752                          struct fl_flow_mask *src)
 753 {
 754         const void *psrc = fl_key_get_start(&src->key, src);
 755         void *pdst = fl_key_get_start(&dst->key, src);
 756
 757         memcpy(pdst, psrc, fl_mask_range(src));
 758         dst->range = src->range;
 759 }
 760
 761 static const struct rhashtable_params fl_ht_params = {
 762         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
 763         .head_offset = offsetof(struct cls_fl_filter, ht_node),
 764         .automatic_shrinking = true,
 765 };
 766
 767 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
 768 {
 769         mask->filter_ht_params = fl_ht_params;
 770         mask->filter_ht_params.key_len = fl_mask_range(mask);
 771         mask->filter_ht_params.key_offset += mask->range.start;
 772
 773         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
 774 }
 775
 776 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
 777 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
 778
 779 #define FL_KEY_IS_MASKED(mask, member)                                          \
 780         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
 781                    0, FL_KEY_MEMBER_SIZE(member))                               \
 782
 783 #define FL_KEY_SET(keys, cnt, id, member)                                       \
 784         do {                                                                    \
 785                 keys[cnt].key_id = id;                                          \
 786                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
 787                 cnt++;                                                          \
 788         } while(0);
 789
 790 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
 791         do {                                                                    \
 792                 if (FL_KEY_IS_MASKED(mask, member))                             \
 793                         FL_KEY_SET(keys, cnt, id, member);                      \
 794         } while(0);
 795
 796 static void fl_init_dissector(struct fl_flow_mask *mask)
 797 {
 798         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
 799         size_t cnt = 0;
 800
 801         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
 802         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
 803         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 804                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
 805         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 806                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
 807         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 808                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
 809         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 810                              FLOW_DISSECTOR_KEY_PORTS, tp);
 811         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 812                              FLOW_DISSECTOR_KEY_IP, ip);
 813         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 814                              FLOW_DISSECTOR_KEY_TCP, tcp);
 815         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 816                              FLOW_DISSECTOR_KEY_ICMP, icmp);
 817         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 818                              FLOW_DISSECTOR_KEY_ARP, arp);
 819         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 820                              FLOW_DISSECTOR_KEY_MPLS, mpls);
 821         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 822                              FLOW_DISSECTOR_KEY_VLAN, vlan);
 823         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 824                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
 825         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 826                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
 827         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 828                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
 829         if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
 830             FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
 831                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
 832                            enc_control);
 833         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 834                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
 835
 836         skb_flow_dissector_init(&mask->dissector, keys, cnt);
 837 }
 838
 839 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
 840                                                struct fl_flow_mask *mask)
 841 {
 842         struct fl_flow_mask *newmask;
 843         int err;
 844
 845         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
 846         if (!newmask)
 847                 return ERR_PTR(-ENOMEM);
 848
 849         fl_mask_copy(newmask, mask);
 850
 851         err = fl_init_mask_hashtable(newmask);
 852         if (err)
 853                 goto errout_free;
 854
 855         fl_init_dissector(newmask);
 856
 857         INIT_LIST_HEAD_RCU(&newmask->filters);
 858
 859         err = rhashtable_insert_fast(&head->ht, &newmask->ht_node,
 860                                      mask_ht_params);
 861         if (err)
 862                 goto errout_destroy;
 863
 864         list_add_tail_rcu(&newmask->list, &head->masks);
 865
 866         return newmask;
 867
 868 errout_destroy:
 869         rhashtable_destroy(&newmask->ht);
 870 errout_free:
 871         kfree(newmask);
 872
 873         return ERR_PTR(err);
 874 }
 875
 876 static int fl_check_assign_mask(struct cls_fl_head *head,
 877                                 struct cls_fl_filter *fnew,
 878                                 struct cls_fl_filter *fold,
 879                                 struct fl_flow_mask *mask)
 880 {
 881         struct fl_flow_mask *newmask;
 882
 883         fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params);
 884         if (!fnew->mask) {
 885                 if (fold)
 886                         return -EINVAL;
 887
 888                 newmask = fl_create_new_mask(head, mask);
 889                 if (IS_ERR(newmask))
 890                         return PTR_ERR(newmask);
 891
 892                 fnew->mask = newmask;
 893         } else if (fold && fold->mask != fnew->mask) {
 894                 return -EINVAL;
 895         }
 896
 897         return 0;
 898 }
 899
 900 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 901                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
 902                         unsigned long base, struct nlattr **tb,
 903                         struct nlattr *est, bool ovr,
 904                         struct netlink_ext_ack *extack)
 905 {
 906         int err;
 907
 908         err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
 909         if (err < 0)
 910                 return err;
 911
 912         if (tb[TCA_FLOWER_CLASSID]) {
 913                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
 914                 tcf_bind_filter(tp, &f->res, base);
 915         }
 916
 917         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
 918         if (err)
 919                 return err;
 920
 921         fl_mask_update_range(mask);
 922         fl_set_masked_key(&f->mkey, &f->key, mask);
 923
 924         return 0;
 925 }
 926
 927 static int fl_change(struct net *net, struct sk_buff *in_skb,
 928                      struct tcf_proto *tp, unsigned long base,
 929                      u32 handle, struct nlattr **tca,
 930                      void **arg, bool ovr, struct netlink_ext_ack *extack)
 931 {
 932         struct cls_fl_head *head = rtnl_dereference(tp->root);
 933         struct cls_fl_filter *fold = *arg;
 934         struct cls_fl_filter *fnew;
 935         struct nlattr **tb;
 936         struct fl_flow_mask mask = {};
 937         int err;
 938
 939         if (!tca[TCA_OPTIONS])
 940                 return -EINVAL;
 941
 942         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
 943         if (!tb)
 944                 return -ENOBUFS;
 945
 946         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
 947                                fl_policy, NULL);
 948         if (err < 0)
 949                 goto errout_tb;
 950
 951         if (fold && handle && fold->handle != handle) {
 952                 err = -EINVAL;
 953                 goto errout_tb;
 954         }
 955
 956         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
 957         if (!fnew) {
 958                 err = -ENOBUFS;
 959                 goto errout_tb;
 960         }
 961
 962         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
 963         if (err < 0)
 964                 goto errout;
 965
 966         if (!handle) {
 967                 handle = 1;
 968                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
 969                                     INT_MAX, GFP_KERNEL);
 970         } else if (!fold) {
 971                 /* user specifies a handle and it doesn't exist */
 972                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
 973                                     handle, GFP_KERNEL);
 974         }
 975         if (err)
 976                 goto errout;
 977         fnew->handle = handle;
 978
 979         if (tb[TCA_FLOWER_FLAGS]) {
 980                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
 981
 982                 if (!tc_flags_valid(fnew->flags)) {
 983                         err = -EINVAL;
 984                         goto errout_idr;
 985                 }
 986         }
 987
 988         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr,
 989                            extack);
 990         if (err)
 991                 goto errout_idr;
 992
 993         err = fl_check_assign_mask(head, fnew, fold, &mask);
 994         if (err)
 995                 goto errout_idr;
 996
 997         if (!tc_skip_sw(fnew->flags)) {
 998                 if (!fold && fl_lookup(fnew->mask, &fnew->mkey)) {
 999                         err = -EEXIST;
1000                         goto errout_mask;
1001                 }
1002
1003                 err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node,
1004                                              fnew->mask->filter_ht_params);
1005                 if (err)
1006                         goto errout_mask;
1007         }
1008
1009         if (!tc_skip_hw(fnew->flags)) {
1010                 err = fl_hw_replace_filter(tp, fnew, extack);
1011                 if (err)
1012                         goto errout_mask;
1013         }
1014
1015         if (!tc_in_hw(fnew->flags))
1016                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1017
1018         if (fold) {
1019                 if (!tc_skip_sw(fold->flags))
1020                         rhashtable_remove_fast(&fold->mask->ht,
1021                                                &fold->ht_node,
1022                                                fold->mask->filter_ht_params);
1023                 if (!tc_skip_hw(fold->flags))
1024                         fl_hw_destroy_filter(tp, fold, NULL);
1025         }
1026
1027         *arg = fnew;
1028
1029         if (fold) {
1030                 idr_replace(&head->handle_idr, fnew, fnew->handle);
1031                 list_replace_rcu(&fold->list, &fnew->list);
1032                 tcf_unbind_filter(tp, &fold->res);
1033                 tcf_exts_get_net(&fold->exts);
1034                 tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
1035         } else {
1036                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1037         }
1038
1039         kfree(tb);
1040         return 0;
1041
1042 errout_mask:
1043         fl_mask_put(head, fnew->mask, false);
1044
1045 errout_idr:
1046         if (!fold)
1047                 idr_remove(&head->handle_idr, fnew->handle);
1048 errout:
1049         tcf_exts_destroy(&fnew->exts);
1050         kfree(fnew);
1051 errout_tb:
1052         kfree(tb);
1053         return err;
1054 }
1055
1056 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1057                      struct netlink_ext_ack *extack)
1058 {
1059         struct cls_fl_head *head = rtnl_dereference(tp->root);
1060         struct cls_fl_filter *f = arg;
1061
1062         if (!tc_skip_sw(f->flags))
1063                 rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
1064                                        f->mask->filter_ht_params);
1065         __fl_delete(tp, f, extack);
1066         *last = list_empty(&head->masks);
1067         return 0;
1068 }
1069
1070 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1071 {
1072         struct cls_fl_head *head = rtnl_dereference(tp->root);
1073         struct cls_fl_filter *f;
1074         struct fl_flow_mask *mask;
1075
1076         list_for_each_entry_rcu(mask, &head->masks, list) {
1077                 list_for_each_entry_rcu(f, &mask->filters, list) {
1078                         if (arg->count < arg->skip)
1079                                 goto skip;
1080                         if (arg->fn(tp, f, arg) < 0) {
1081                                 arg->stop = 1;
1082                                 break;
1083                         }
1084 skip:
1085                         arg->count++;
1086                 }
1087         }
1088 }
1089
1090 static int fl_dump_key_val(struct sk_buff *skb,
1091                            void *val, int val_type,
1092                            void *mask, int mask_type, int len)
1093 {
1094         int err;
1095
1096         if (!memchr_inv(mask, 0, len))
1097                 return 0;
1098         err = nla_put(skb, val_type, len, val);
1099         if (err)
1100                 return err;
1101         if (mask_type != TCA_FLOWER_UNSPEC) {
1102                 err = nla_put(skb, mask_type, len, mask);
1103                 if (err)
1104                         return err;
1105         }
1106         return 0;
1107 }
1108
1109 static int fl_dump_key_mpls(struct sk_buff *skb,
1110                             struct flow_dissector_key_mpls *mpls_key,
1111                             struct flow_dissector_key_mpls *mpls_mask)
1112 {
1113         int err;
1114
1115         if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1116                 return 0;
1117         if (mpls_mask->mpls_ttl) {
1118                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1119                                  mpls_key->mpls_ttl);
1120                 if (err)
1121                         return err;
1122         }
1123         if (mpls_mask->mpls_tc) {
1124                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1125                                  mpls_key->mpls_tc);
1126                 if (err)
1127                         return err;
1128         }
1129         if (mpls_mask->mpls_label) {
1130                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1131                                   mpls_key->mpls_label);
1132                 if (err)
1133                         return err;
1134         }
1135         if (mpls_mask->mpls_bos) {
1136                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1137                                  mpls_key->mpls_bos);
1138                 if (err)
1139                         return err;
1140         }
1141         return 0;
1142 }
1143
1144 static int fl_dump_key_ip(struct sk_buff *skb,
1145                           struct flow_dissector_key_ip *key,
1146                           struct flow_dissector_key_ip *mask)
1147 {
1148         if (fl_dump_key_val(skb, &key->tos, TCA_FLOWER_KEY_IP_TOS, &mask->tos,
1149                             TCA_FLOWER_KEY_IP_TOS_MASK, sizeof(key->tos)) ||
1150             fl_dump_key_val(skb, &key->ttl, TCA_FLOWER_KEY_IP_TTL, &mask->ttl,
1151                             TCA_FLOWER_KEY_IP_TTL_MASK, sizeof(key->ttl)))
1152                 return -1;
1153
1154         return 0;
1155 }
1156
1157 static int fl_dump_key_vlan(struct sk_buff *skb,
1158                             struct flow_dissector_key_vlan *vlan_key,
1159                             struct flow_dissector_key_vlan *vlan_mask)
1160 {
1161         int err;
1162
1163         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1164                 return 0;
1165         if (vlan_mask->vlan_id) {
1166                 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1167                                   vlan_key->vlan_id);
1168                 if (err)
1169                         return err;
1170         }
1171         if (vlan_mask->vlan_priority) {
1172                 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1173                                  vlan_key->vlan_priority);
1174                 if (err)
1175                         return err;
1176         }
1177         return 0;
1178 }
1179
1180 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1181                             u32 *flower_key, u32 *flower_mask,
1182                             u32 flower_flag_bit, u32 dissector_flag_bit)
1183 {
1184         if (dissector_mask & dissector_flag_bit) {
1185                 *flower_mask |= flower_flag_bit;
1186                 if (dissector_key & dissector_flag_bit)
1187                         *flower_key |= flower_flag_bit;
1188         }
1189 }
1190
1191 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1192 {
1193         u32 key, mask;
1194         __be32 _key, _mask;
1195         int err;
1196
1197         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1198                 return 0;
1199
1200         key = 0;
1201         mask = 0;
1202
1203         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1204                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1205         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1206                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1207                         FLOW_DIS_FIRST_FRAG);
1208
1209         _key = cpu_to_be32(key);
1210         _mask = cpu_to_be32(mask);
1211
1212         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1213         if (err)
1214                 return err;
1215
1216         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1217 }
1218
1219 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1220                    struct sk_buff *skb, struct tcmsg *t)
1221 {
1222         struct cls_fl_filter *f = fh;
1223         struct nlattr *nest;
1224         struct fl_flow_key *key, *mask;
1225
1226         if (!f)
1227                 return skb->len;
1228
1229         t->tcm_handle = f->handle;
1230
1231         nest = nla_nest_start(skb, TCA_OPTIONS);
1232         if (!nest)
1233                 goto nla_put_failure;
1234
1235         if (f->res.classid &&
1236             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1237                 goto nla_put_failure;
1238
1239         key = &f->key;
1240         mask = &f->mask->key;
1241
1242         if (mask->indev_ifindex) {
1243                 struct net_device *dev;
1244
1245                 dev = __dev_get_by_index(net, key->indev_ifindex);
1246                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1247                         goto nla_put_failure;
1248         }
1249
1250         if (!tc_skip_hw(f->flags))
1251                 fl_hw_update_stats(tp, f);
1252
1253         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1254                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1255                             sizeof(key->eth.dst)) ||
1256             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1257                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1258                             sizeof(key->eth.src)) ||
1259             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1260                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1261                             sizeof(key->basic.n_proto)))
1262                 goto nla_put_failure;
1263
1264         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1265                 goto nla_put_failure;
1266
1267         if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1268                 goto nla_put_failure;
1269
1270         if ((key->basic.n_proto == htons(ETH_P_IP) ||
1271              key->basic.n_proto == htons(ETH_P_IPV6)) &&
1272             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1273                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1274                             sizeof(key->basic.ip_proto)) ||
1275             fl_dump_key_ip(skb, &key->ip, &mask->ip)))
1276                 goto nla_put_failure;
1277
1278         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1279             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1280                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1281                              sizeof(key->ipv4.src)) ||
1282              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1283                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1284                              sizeof(key->ipv4.dst))))
1285                 goto nla_put_failure;
1286         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1287                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1288                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1289                                   sizeof(key->ipv6.src)) ||
1290                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1291                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1292                                   sizeof(key->ipv6.dst))))
1293                 goto nla_put_failure;
1294
1295         if (key->basic.ip_proto == IPPROTO_TCP &&
1296             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1297                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1298                              sizeof(key->tp.src)) ||
1299              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1300                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1301                              sizeof(key->tp.dst)) ||
1302              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1303                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1304                              sizeof(key->tcp.flags))))
1305                 goto nla_put_failure;
1306         else if (key->basic.ip_proto == IPPROTO_UDP &&
1307                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1308                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1309                                   sizeof(key->tp.src)) ||
1310                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1311                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1312                                   sizeof(key->tp.dst))))
1313                 goto nla_put_failure;
1314         else if (key->basic.ip_proto == IPPROTO_SCTP &&
1315                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1316                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1317                                   sizeof(key->tp.src)) ||
1318                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1319                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1320                                   sizeof(key->tp.dst))))
1321                 goto nla_put_failure;
1322         else if (key->basic.n_proto == htons(ETH_P_IP) &&
1323                  key->basic.ip_proto == IPPROTO_ICMP &&
1324                  (fl_dump_key_val(skb, &key->icmp.type,
1325                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1326                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1327                                   sizeof(key->icmp.type)) ||
1328                   fl_dump_key_val(skb, &key->icmp.code,
1329                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1330                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1331                                   sizeof(key->icmp.code))))
1332                 goto nla_put_failure;
1333         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1334                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
1335                  (fl_dump_key_val(skb, &key->icmp.type,
1336                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1337                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1338                                   sizeof(key->icmp.type)) ||
1339                   fl_dump_key_val(skb, &key->icmp.code,
1340                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1341                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1342                                   sizeof(key->icmp.code))))
1343                 goto nla_put_failure;
1344         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1345                   key->basic.n_proto == htons(ETH_P_RARP)) &&
1346                  (fl_dump_key_val(skb, &key->arp.sip,
1347                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1348                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
1349                                   sizeof(key->arp.sip)) ||
1350                   fl_dump_key_val(skb, &key->arp.tip,
1351                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1352                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
1353                                   sizeof(key->arp.tip)) ||
1354                   fl_dump_key_val(skb, &key->arp.op,
1355                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1356                                   TCA_FLOWER_KEY_ARP_OP_MASK,
1357                                   sizeof(key->arp.op)) ||
1358                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1359                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1360                                   sizeof(key->arp.sha)) ||
1361                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1362                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1363                                   sizeof(key->arp.tha))))
1364                 goto nla_put_failure;
1365
1366         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1367             (fl_dump_key_val(skb, &key->enc_ipv4.src,
1368                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1369                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1370                             sizeof(key->enc_ipv4.src)) ||
1371              fl_dump_key_val(skb, &key->enc_ipv4.dst,
1372                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1373                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1374                              sizeof(key->enc_ipv4.dst))))
1375                 goto nla_put_failure;
1376         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1377                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
1378                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1379                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1380                             sizeof(key->enc_ipv6.src)) ||
1381                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
1382                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
1383                                  &mask->enc_ipv6.dst,
1384                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1385                             sizeof(key->enc_ipv6.dst))))
1386                 goto nla_put_failure;
1387
1388         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1389                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1390                             sizeof(key->enc_key_id)) ||
1391             fl_dump_key_val(skb, &key->enc_tp.src,
1392                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1393                             &mask->enc_tp.src,
1394                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1395                             sizeof(key->enc_tp.src)) ||
1396             fl_dump_key_val(skb, &key->enc_tp.dst,
1397                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1398                             &mask->enc_tp.dst,
1399                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1400                             sizeof(key->enc_tp.dst)))
1401                 goto nla_put_failure;
1402
1403         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1404                 goto nla_put_failure;
1405
1406         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1407                 goto nla_put_failure;
1408
1409         if (tcf_exts_dump(skb, &f->exts))
1410                 goto nla_put_failure;
1411
1412         nla_nest_end(skb, nest);
1413
1414         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1415                 goto nla_put_failure;
1416
1417         return skb->len;
1418
1419 nla_put_failure:
1420         nla_nest_cancel(skb, nest);
1421         return -1;
1422 }
1423
1424 static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
1425 {
1426         struct cls_fl_filter *f = fh;
1427
1428         if (f && f->res.classid == classid)
1429                 f->res.class = cl;
1430 }
1431
1432 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1433         .kind           = "flower",
1434         .classify       = fl_classify,
1435         .init           = fl_init,
1436         .destroy        = fl_destroy,
1437         .get            = fl_get,
1438         .change         = fl_change,
1439         .delete         = fl_delete,
1440         .walk           = fl_walk,
1441         .dump           = fl_dump,
1442         .bind_class     = fl_bind_class,
1443         .owner          = THIS_MODULE,
1444 };
1445
1446 static int __init cls_fl_init(void)
1447 {
1448         return register_tcf_proto_ops(&cls_fl_ops);
1449 }
1450
1451 static void __exit cls_fl_exit(void)
1452 {
1453         unregister_tcf_proto_ops(&cls_fl_ops);
1454 }
1455
1456 module_init(cls_fl_init);
1457 module_exit(cls_fl_exit);
1458
1459 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1460 MODULE_DESCRIPTION("Flower classifier");
1461 MODULE_LICENSE("GPL v2");