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
  22 #include <net/sch_generic.h>
  23 #include <net/pkt_cls.h>
  24 #include <net/ip.h>
  25 #include <net/flow_dissector.h>
  26
  27 #include <net/dst.h>
  28 #include <net/dst_metadata.h>
  29
  30 struct fl_flow_key {
  31         int     indev_ifindex;
  32         struct flow_dissector_key_control control;
  33         struct flow_dissector_key_control enc_control;
  34         struct flow_dissector_key_basic basic;
  35         struct flow_dissector_key_eth_addrs eth;
  36         struct flow_dissector_key_vlan vlan;
  37         union {
  38                 struct flow_dissector_key_ipv4_addrs ipv4;
  39                 struct flow_dissector_key_ipv6_addrs ipv6;
  40         };
  41         struct flow_dissector_key_ports tp;
  42         struct flow_dissector_key_keyid enc_key_id;
  43         union {
  44                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  45                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  46         };
  47         struct flow_dissector_key_ports enc_tp;
  48 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  49
  50 struct fl_flow_mask_range {
  51         unsigned short int start;
  52         unsigned short int end;
  53 };
  54
  55 struct fl_flow_mask {
  56         struct fl_flow_key key;
  57         struct fl_flow_mask_range range;
  58         struct rcu_head rcu;
  59 };
  60
  61 struct cls_fl_head {
  62         struct rhashtable ht;
  63         struct fl_flow_mask mask;
  64         struct flow_dissector dissector;
  65         u32 hgen;
  66         bool mask_assigned;
  67         struct list_head filters;
  68         struct rhashtable_params ht_params;
  69         union {
  70                 struct work_struct work;
  71                 struct rcu_head rcu;
  72         };
  73 };
  74
  75 struct cls_fl_filter {
  76         struct rhash_head ht_node;
  77         struct fl_flow_key mkey;
  78         struct tcf_exts exts;
  79         struct tcf_result res;
  80         struct fl_flow_key key;
  81         struct list_head list;
  82         u32 handle;
  83         u32 flags;
  84         struct rcu_head rcu;
  85         struct tc_to_netdev tc;
  86         struct net_device *hw_dev;
  87 };
  88
  89 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
  90 {
  91         return mask->range.end - mask->range.start;
  92 }
  93
  94 static void fl_mask_update_range(struct fl_flow_mask *mask)
  95 {
  96         const u8 *bytes = (const u8 *) &mask->key;
  97         size_t size = sizeof(mask->key);
  98         size_t i, first = 0, last = size - 1;
  99
 100         for (i = 0; i < sizeof(mask->key); i++) {
 101                 if (bytes[i]) {
 102                         if (!first && i)
 103                                 first = i;
 104                         last = i;
 105                 }
 106         }
 107         mask->range.start = rounddown(first, sizeof(long));
 108         mask->range.end = roundup(last + 1, sizeof(long));
 109 }
 110
 111 static void *fl_key_get_start(struct fl_flow_key *key,
 112                               const struct fl_flow_mask *mask)
 113 {
 114         return (u8 *) key + mask->range.start;
 115 }
 116
 117 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 118                               struct fl_flow_mask *mask)
 119 {
 120         const long *lkey = fl_key_get_start(key, mask);
 121         const long *lmask = fl_key_get_start(&mask->key, mask);
 122         long *lmkey = fl_key_get_start(mkey, mask);
 123         int i;
 124
 125         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 126                 *lmkey++ = *lkey++ & *lmask++;
 127 }
 128
 129 static void fl_clear_masked_range(struct fl_flow_key *key,
 130                                   struct fl_flow_mask *mask)
 131 {
 132         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 133 }
 134
 135 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 136                        struct tcf_result *res)
 137 {
 138         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 139         struct cls_fl_filter *f;
 140         struct fl_flow_key skb_key;
 141         struct fl_flow_key skb_mkey;
 142         struct ip_tunnel_info *info;
 143
 144         if (!atomic_read(&head->ht.nelems))
 145                 return -1;
 146
 147         fl_clear_masked_range(&skb_key, &head->mask);
 148
 149         info = skb_tunnel_info(skb);
 150         if (info) {
 151                 struct ip_tunnel_key *key = &info->key;
 152
 153                 switch (ip_tunnel_info_af(info)) {
 154                 case AF_INET:
 155                         skb_key.enc_ipv4.src = key->u.ipv4.src;
 156                         skb_key.enc_ipv4.dst = key->u.ipv4.dst;
 157                         break;
 158                 case AF_INET6:
 159                         skb_key.enc_ipv6.src = key->u.ipv6.src;
 160                         skb_key.enc_ipv6.dst = key->u.ipv6.dst;
 161                         break;
 162                 }
 163
 164                 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
 165                 skb_key.enc_tp.src = key->tp_src;
 166                 skb_key.enc_tp.dst = key->tp_dst;
 167         }
 168
 169         skb_key.indev_ifindex = skb->skb_iif;
 170         /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
 171          * so do it rather here.
 172          */
 173         skb_key.basic.n_proto = skb->protocol;
 174         skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
 175
 176         fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
 177
 178         f = rhashtable_lookup_fast(&head->ht,
 179                                    fl_key_get_start(&skb_mkey, &head->mask),
 180                                    head->ht_params);
 181         if (f && !tc_skip_sw(f->flags)) {
 182                 *res = f->res;
 183                 return tcf_exts_exec(skb, &f->exts, res);
 184         }
 185         return -1;
 186 }
 187
 188 static int fl_init(struct tcf_proto *tp)
 189 {
 190         struct cls_fl_head *head;
 191
 192         head = kzalloc(sizeof(*head), GFP_KERNEL);
 193         if (!head)
 194                 return -ENOBUFS;
 195
 196         INIT_LIST_HEAD_RCU(&head->filters);
 197         rcu_assign_pointer(tp->root, head);
 198
 199         return 0;
 200 }
 201
 202 static void fl_destroy_filter(struct rcu_head *head)
 203 {
 204         struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
 205
 206         tcf_exts_destroy(&f->exts);
 207         kfree(f);
 208 }
 209
 210 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
 211 {
 212         struct tc_cls_flower_offload offload = {0};
 213         struct net_device *dev = f->hw_dev;
 214         struct tc_to_netdev *tc = &f->tc;
 215
 216         if (!tc_can_offload(dev, tp))
 217                 return;
 218
 219         offload.command = TC_CLSFLOWER_DESTROY;
 220         offload.cookie = (unsigned long)f;
 221
 222         tc->type = TC_SETUP_CLSFLOWER;
 223         tc->cls_flower = &offload;
 224
 225         dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
 226 }
 227
 228 static int fl_hw_replace_filter(struct tcf_proto *tp,
 229                                 struct flow_dissector *dissector,
 230                                 struct fl_flow_key *mask,
 231                                 struct cls_fl_filter *f)
 232 {
 233         struct net_device *dev = tp->q->dev_queue->dev;
 234         struct tc_cls_flower_offload offload = {0};
 235         struct tc_to_netdev *tc = &f->tc;
 236         int err;
 237
 238         if (!tc_can_offload(dev, tp)) {
 239                 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) ||
 240                     (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) {
 241                         f->hw_dev = dev;
 242                         return tc_skip_sw(f->flags) ? -EINVAL : 0;
 243                 }
 244                 dev = f->hw_dev;
 245                 tc->egress_dev = true;
 246         } else {
 247                 f->hw_dev = dev;
 248         }
 249
 250         offload.command = TC_CLSFLOWER_REPLACE;
 251         offload.cookie = (unsigned long)f;
 252         offload.dissector = dissector;
 253         offload.mask = mask;
 254         offload.key = &f->key;
 255         offload.exts = &f->exts;
 256
 257         tc->type = TC_SETUP_CLSFLOWER;
 258         tc->cls_flower = &offload;
 259
 260         err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
 261                                             tc);
 262
 263         if (tc_skip_sw(f->flags))
 264                 return err;
 265         return 0;
 266 }
 267
 268 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 269 {
 270         struct tc_cls_flower_offload offload = {0};
 271         struct net_device *dev = f->hw_dev;
 272         struct tc_to_netdev *tc = &f->tc;
 273
 274         if (!tc_can_offload(dev, tp))
 275                 return;
 276
 277         offload.command = TC_CLSFLOWER_STATS;
 278         offload.cookie = (unsigned long)f;
 279         offload.exts = &f->exts;
 280
 281         tc->type = TC_SETUP_CLSFLOWER;
 282         tc->cls_flower = &offload;
 283
 284         dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
 285 }
 286
 287 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
 288 {
 289         list_del_rcu(&f->list);
 290         if (!tc_skip_hw(f->flags))
 291                 fl_hw_destroy_filter(tp, f);
 292         tcf_unbind_filter(tp, &f->res);
 293         call_rcu(&f->rcu, fl_destroy_filter);
 294 }
 295
 296 static void fl_destroy_sleepable(struct work_struct *work)
 297 {
 298         struct cls_fl_head *head = container_of(work, struct cls_fl_head,
 299                                                 work);
 300         if (head->mask_assigned)
 301                 rhashtable_destroy(&head->ht);
 302         kfree(head);
 303         module_put(THIS_MODULE);
 304 }
 305
 306 static void fl_destroy_rcu(struct rcu_head *rcu)
 307 {
 308         struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
 309
 310         INIT_WORK(&head->work, fl_destroy_sleepable);
 311         schedule_work(&head->work);
 312 }
 313
 314 static bool fl_destroy(struct tcf_proto *tp, bool force)
 315 {
 316         struct cls_fl_head *head = rtnl_dereference(tp->root);
 317         struct cls_fl_filter *f, *next;
 318
 319         if (!force && !list_empty(&head->filters))
 320                 return false;
 321
 322         list_for_each_entry_safe(f, next, &head->filters, list)
 323                 __fl_delete(tp, f);
 324
 325         __module_get(THIS_MODULE);
 326         call_rcu(&head->rcu, fl_destroy_rcu);
 327
 328         return true;
 329 }
 330
 331 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
 332 {
 333         struct cls_fl_head *head = rtnl_dereference(tp->root);
 334         struct cls_fl_filter *f;
 335
 336         list_for_each_entry(f, &head->filters, list)
 337                 if (f->handle == handle)
 338                         return (unsigned long) f;
 339         return 0;
 340 }
 341
 342 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 343         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 344         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 345         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 346                                             .len = IFNAMSIZ },
 347         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 348         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 349         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 350         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 351         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 352         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 353         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 354         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 355         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 356         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 357         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 358         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 359         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 360         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 361         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 362         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 363         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 364         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 365         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 366         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 367         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 368         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 369         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 370         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 371         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 372         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 373         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 374         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 375         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 376         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 377         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 378         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 379         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 380         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 381         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 382         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 383         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 384         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 385         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 386         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 387         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 388         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 389 };
 390
 391 static void fl_set_key_val(struct nlattr **tb,
 392                            void *val, int val_type,
 393                            void *mask, int mask_type, int len)
 394 {
 395         if (!tb[val_type])
 396                 return;
 397         memcpy(val, nla_data(tb[val_type]), len);
 398         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 399                 memset(mask, 0xff, len);
 400         else
 401                 memcpy(mask, nla_data(tb[mask_type]), len);
 402 }
 403
 404 static void fl_set_key_vlan(struct nlattr **tb,
 405                             struct flow_dissector_key_vlan *key_val,
 406                             struct flow_dissector_key_vlan *key_mask)
 407 {
 408 #define VLAN_PRIORITY_MASK      0x7
 409
 410         if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
 411                 key_val->vlan_id =
 412                         nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
 413                 key_mask->vlan_id = VLAN_VID_MASK;
 414         }
 415         if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
 416                 key_val->vlan_priority =
 417                         nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
 418                         VLAN_PRIORITY_MASK;
 419                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 420         }
 421 }
 422
 423 static int fl_set_key(struct net *net, struct nlattr **tb,
 424                       struct fl_flow_key *key, struct fl_flow_key *mask)
 425 {
 426         __be16 ethertype;
 427 #ifdef CONFIG_NET_CLS_IND
 428         if (tb[TCA_FLOWER_INDEV]) {
 429                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
 430                 if (err < 0)
 431                         return err;
 432                 key->indev_ifindex = err;
 433                 mask->indev_ifindex = 0xffffffff;
 434         }
 435 #endif
 436
 437         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 438                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 439                        sizeof(key->eth.dst));
 440         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 441                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 442                        sizeof(key->eth.src));
 443
 444         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 445                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 446
 447                 if (ethertype == htons(ETH_P_8021Q)) {
 448                         fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
 449                         fl_set_key_val(tb, &key->basic.n_proto,
 450                                        TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 451                                        &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 452                                        sizeof(key->basic.n_proto));
 453                 } else {
 454                         key->basic.n_proto = ethertype;
 455                         mask->basic.n_proto = cpu_to_be16(~0);
 456                 }
 457         }
 458
 459         if (key->basic.n_proto == htons(ETH_P_IP) ||
 460             key->basic.n_proto == htons(ETH_P_IPV6)) {
 461                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 462                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 463                                sizeof(key->basic.ip_proto));
 464         }
 465
 466         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 467                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 468                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 469                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 470                                sizeof(key->ipv4.src));
 471                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 472                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 473                                sizeof(key->ipv4.dst));
 474         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 475                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 476                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 477                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 478                                sizeof(key->ipv6.src));
 479                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 480                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 481                                sizeof(key->ipv6.dst));
 482         }
 483
 484         if (key->basic.ip_proto == IPPROTO_TCP) {
 485                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 486                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 487                                sizeof(key->tp.src));
 488                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 489                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 490                                sizeof(key->tp.dst));
 491         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 492                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 493                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 494                                sizeof(key->tp.src));
 495                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 496                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 497                                sizeof(key->tp.dst));
 498         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 499                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 500                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 501                                sizeof(key->tp.src));
 502                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 503                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 504                                sizeof(key->tp.dst));
 505         }
 506
 507         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
 508             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
 509                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 510                 fl_set_key_val(tb, &key->enc_ipv4.src,
 511                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
 512                                &mask->enc_ipv4.src,
 513                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 514                                sizeof(key->enc_ipv4.src));
 515                 fl_set_key_val(tb, &key->enc_ipv4.dst,
 516                                TCA_FLOWER_KEY_ENC_IPV4_DST,
 517                                &mask->enc_ipv4.dst,
 518                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 519                                sizeof(key->enc_ipv4.dst));
 520         }
 521
 522         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
 523             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
 524                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 525                 fl_set_key_val(tb, &key->enc_ipv6.src,
 526                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
 527                                &mask->enc_ipv6.src,
 528                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 529                                sizeof(key->enc_ipv6.src));
 530                 fl_set_key_val(tb, &key->enc_ipv6.dst,
 531                                TCA_FLOWER_KEY_ENC_IPV6_DST,
 532                                &mask->enc_ipv6.dst,
 533                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 534                                sizeof(key->enc_ipv6.dst));
 535         }
 536
 537         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
 538                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
 539                        sizeof(key->enc_key_id.keyid));
 540
 541         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 542                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 543                        sizeof(key->enc_tp.src));
 544
 545         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 546                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 547                        sizeof(key->enc_tp.dst));
 548
 549         return 0;
 550 }
 551
 552 static bool fl_mask_eq(struct fl_flow_mask *mask1,
 553                        struct fl_flow_mask *mask2)
 554 {
 555         const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
 556         const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
 557
 558         return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
 559                !memcmp(lmask1, lmask2, fl_mask_range(mask1));
 560 }
 561
 562 static const struct rhashtable_params fl_ht_params = {
 563         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
 564         .head_offset = offsetof(struct cls_fl_filter, ht_node),
 565         .automatic_shrinking = true,
 566 };
 567
 568 static int fl_init_hashtable(struct cls_fl_head *head,
 569                              struct fl_flow_mask *mask)
 570 {
 571         head->ht_params = fl_ht_params;
 572         head->ht_params.key_len = fl_mask_range(mask);
 573         head->ht_params.key_offset += mask->range.start;
 574
 575         return rhashtable_init(&head->ht, &head->ht_params);
 576 }
 577
 578 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
 579 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
 580
 581 #define FL_KEY_IS_MASKED(mask, member)                                          \
 582         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
 583                    0, FL_KEY_MEMBER_SIZE(member))                               \
 584
 585 #define FL_KEY_SET(keys, cnt, id, member)                                       \
 586         do {                                                                    \
 587                 keys[cnt].key_id = id;                                          \
 588                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
 589                 cnt++;                                                          \
 590         } while(0);
 591
 592 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
 593         do {                                                                    \
 594                 if (FL_KEY_IS_MASKED(mask, member))                             \
 595                         FL_KEY_SET(keys, cnt, id, member);                      \
 596         } while(0);
 597
 598 static void fl_init_dissector(struct cls_fl_head *head,
 599                               struct fl_flow_mask *mask)
 600 {
 601         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
 602         size_t cnt = 0;
 603
 604         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
 605         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
 606         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 607                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
 608         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 609                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
 610         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 611                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
 612         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 613                              FLOW_DISSECTOR_KEY_PORTS, tp);
 614         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 615                              FLOW_DISSECTOR_KEY_VLAN, vlan);
 616         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 617                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
 618         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 619                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
 620         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 621                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
 622         if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
 623             FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
 624                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
 625                            enc_control);
 626         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 627                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
 628
 629         skb_flow_dissector_init(&head->dissector, keys, cnt);
 630 }
 631
 632 static int fl_check_assign_mask(struct cls_fl_head *head,
 633                                 struct fl_flow_mask *mask)
 634 {
 635         int err;
 636
 637         if (head->mask_assigned) {
 638                 if (!fl_mask_eq(&head->mask, mask))
 639                         return -EINVAL;
 640                 else
 641                         return 0;
 642         }
 643
 644         /* Mask is not assigned yet. So assign it and init hashtable
 645          * according to that.
 646          */
 647         err = fl_init_hashtable(head, mask);
 648         if (err)
 649                 return err;
 650         memcpy(&head->mask, mask, sizeof(head->mask));
 651         head->mask_assigned = true;
 652
 653         fl_init_dissector(head, mask);
 654
 655         return 0;
 656 }
 657
 658 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 659                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
 660                         unsigned long base, struct nlattr **tb,
 661                         struct nlattr *est, bool ovr)
 662 {
 663         struct tcf_exts e;
 664         int err;
 665
 666         err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
 667         if (err < 0)
 668                 return err;
 669         err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
 670         if (err < 0)
 671                 goto errout;
 672
 673         if (tb[TCA_FLOWER_CLASSID]) {
 674                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
 675                 tcf_bind_filter(tp, &f->res, base);
 676         }
 677
 678         err = fl_set_key(net, tb, &f->key, &mask->key);
 679         if (err)
 680                 goto errout;
 681
 682         fl_mask_update_range(mask);
 683         fl_set_masked_key(&f->mkey, &f->key, mask);
 684
 685         tcf_exts_change(tp, &f->exts, &e);
 686
 687         return 0;
 688 errout:
 689         tcf_exts_destroy(&e);
 690         return err;
 691 }
 692
 693 static u32 fl_grab_new_handle(struct tcf_proto *tp,
 694                               struct cls_fl_head *head)
 695 {
 696         unsigned int i = 0x80000000;
 697         u32 handle;
 698
 699         do {
 700                 if (++head->hgen == 0x7FFFFFFF)
 701                         head->hgen = 1;
 702         } while (--i > 0 && fl_get(tp, head->hgen));
 703
 704         if (unlikely(i == 0)) {
 705                 pr_err("Insufficient number of handles\n");
 706                 handle = 0;
 707         } else {
 708                 handle = head->hgen;
 709         }
 710
 711         return handle;
 712 }
 713
 714 static int fl_change(struct net *net, struct sk_buff *in_skb,
 715                      struct tcf_proto *tp, unsigned long base,
 716                      u32 handle, struct nlattr **tca,
 717                      unsigned long *arg, bool ovr)
 718 {
 719         struct cls_fl_head *head = rtnl_dereference(tp->root);
 720         struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
 721         struct cls_fl_filter *fnew;
 722         struct nlattr *tb[TCA_FLOWER_MAX + 1];
 723         struct fl_flow_mask mask = {};
 724         int err;
 725
 726         if (!tca[TCA_OPTIONS])
 727                 return -EINVAL;
 728
 729         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy);
 730         if (err < 0)
 731                 return err;
 732
 733         if (fold && handle && fold->handle != handle)
 734                 return -EINVAL;
 735
 736         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
 737         if (!fnew)
 738                 return -ENOBUFS;
 739
 740         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
 741         if (err < 0)
 742                 goto errout;
 743
 744         if (!handle) {
 745                 handle = fl_grab_new_handle(tp, head);
 746                 if (!handle) {
 747                         err = -EINVAL;
 748                         goto errout;
 749                 }
 750         }
 751         fnew->handle = handle;
 752
 753         if (tb[TCA_FLOWER_FLAGS]) {
 754                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
 755
 756                 if (!tc_flags_valid(fnew->flags)) {
 757                         err = -EINVAL;
 758                         goto errout;
 759                 }
 760         }
 761
 762         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
 763         if (err)
 764                 goto errout;
 765
 766         err = fl_check_assign_mask(head, &mask);
 767         if (err)
 768                 goto errout;
 769
 770         if (!tc_skip_sw(fnew->flags)) {
 771                 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
 772                                              head->ht_params);
 773                 if (err)
 774                         goto errout;
 775         }
 776
 777         if (!tc_skip_hw(fnew->flags)) {
 778                 err = fl_hw_replace_filter(tp,
 779                                            &head->dissector,
 780                                            &mask.key,
 781                                            fnew);
 782                 if (err)
 783                         goto errout;
 784         }
 785
 786         if (fold) {
 787                 if (!tc_skip_sw(fold->flags))
 788                         rhashtable_remove_fast(&head->ht, &fold->ht_node,
 789                                                head->ht_params);
 790                 if (!tc_skip_hw(fold->flags))
 791                         fl_hw_destroy_filter(tp, fold);
 792         }
 793
 794         *arg = (unsigned long) fnew;
 795
 796         if (fold) {
 797                 list_replace_rcu(&fold->list, &fnew->list);
 798                 tcf_unbind_filter(tp, &fold->res);
 799                 call_rcu(&fold->rcu, fl_destroy_filter);
 800         } else {
 801                 list_add_tail_rcu(&fnew->list, &head->filters);
 802         }
 803
 804         return 0;
 805
 806 errout:
 807         tcf_exts_destroy(&fnew->exts);
 808         kfree(fnew);
 809         return err;
 810 }
 811
 812 static int fl_delete(struct tcf_proto *tp, unsigned long arg)
 813 {
 814         struct cls_fl_head *head = rtnl_dereference(tp->root);
 815         struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
 816
 817         if (!tc_skip_sw(f->flags))
 818                 rhashtable_remove_fast(&head->ht, &f->ht_node,
 819                                        head->ht_params);
 820         __fl_delete(tp, f);
 821         return 0;
 822 }
 823
 824 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
 825 {
 826         struct cls_fl_head *head = rtnl_dereference(tp->root);
 827         struct cls_fl_filter *f;
 828
 829         list_for_each_entry_rcu(f, &head->filters, list) {
 830                 if (arg->count < arg->skip)
 831                         goto skip;
 832                 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
 833                         arg->stop = 1;
 834                         break;
 835                 }
 836 skip:
 837                 arg->count++;
 838         }
 839 }
 840
 841 static int fl_dump_key_val(struct sk_buff *skb,
 842                            void *val, int val_type,
 843                            void *mask, int mask_type, int len)
 844 {
 845         int err;
 846
 847         if (!memchr_inv(mask, 0, len))
 848                 return 0;
 849         err = nla_put(skb, val_type, len, val);
 850         if (err)
 851                 return err;
 852         if (mask_type != TCA_FLOWER_UNSPEC) {
 853                 err = nla_put(skb, mask_type, len, mask);
 854                 if (err)
 855                         return err;
 856         }
 857         return 0;
 858 }
 859
 860 static int fl_dump_key_vlan(struct sk_buff *skb,
 861                             struct flow_dissector_key_vlan *vlan_key,
 862                             struct flow_dissector_key_vlan *vlan_mask)
 863 {
 864         int err;
 865
 866         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
 867                 return 0;
 868         if (vlan_mask->vlan_id) {
 869                 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
 870                                   vlan_key->vlan_id);
 871                 if (err)
 872                         return err;
 873         }
 874         if (vlan_mask->vlan_priority) {
 875                 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
 876                                  vlan_key->vlan_priority);
 877                 if (err)
 878                         return err;
 879         }
 880         return 0;
 881 }
 882
 883 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
 884                    struct sk_buff *skb, struct tcmsg *t)
 885 {
 886         struct cls_fl_head *head = rtnl_dereference(tp->root);
 887         struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
 888         struct nlattr *nest;
 889         struct fl_flow_key *key, *mask;
 890
 891         if (!f)
 892                 return skb->len;
 893
 894         t->tcm_handle = f->handle;
 895
 896         nest = nla_nest_start(skb, TCA_OPTIONS);
 897         if (!nest)
 898                 goto nla_put_failure;
 899
 900         if (f->res.classid &&
 901             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
 902                 goto nla_put_failure;
 903
 904         key = &f->key;
 905         mask = &head->mask.key;
 906
 907         if (mask->indev_ifindex) {
 908                 struct net_device *dev;
 909
 910                 dev = __dev_get_by_index(net, key->indev_ifindex);
 911                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
 912                         goto nla_put_failure;
 913         }
 914
 915         if (!tc_skip_hw(f->flags))
 916                 fl_hw_update_stats(tp, f);
 917
 918         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 919                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 920                             sizeof(key->eth.dst)) ||
 921             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 922                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 923                             sizeof(key->eth.src)) ||
 924             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
 925                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 926                             sizeof(key->basic.n_proto)))
 927                 goto nla_put_failure;
 928
 929         if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
 930                 goto nla_put_failure;
 931
 932         if ((key->basic.n_proto == htons(ETH_P_IP) ||
 933              key->basic.n_proto == htons(ETH_P_IPV6)) &&
 934             fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 935                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 936                             sizeof(key->basic.ip_proto)))
 937                 goto nla_put_failure;
 938
 939         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
 940             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 941                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 942                              sizeof(key->ipv4.src)) ||
 943              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 944                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 945                              sizeof(key->ipv4.dst))))
 946                 goto nla_put_failure;
 947         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
 948                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 949                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 950                                   sizeof(key->ipv6.src)) ||
 951                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 952                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 953                                   sizeof(key->ipv6.dst))))
 954                 goto nla_put_failure;
 955
 956         if (key->basic.ip_proto == IPPROTO_TCP &&
 957             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 958                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 959                              sizeof(key->tp.src)) ||
 960              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 961                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 962                              sizeof(key->tp.dst))))
 963                 goto nla_put_failure;
 964         else if (key->basic.ip_proto == IPPROTO_UDP &&
 965                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 966                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 967                                   sizeof(key->tp.src)) ||
 968                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 969                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 970                                   sizeof(key->tp.dst))))
 971                 goto nla_put_failure;
 972         else if (key->basic.ip_proto == IPPROTO_SCTP &&
 973                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 974                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 975                                   sizeof(key->tp.src)) ||
 976                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 977                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 978                                   sizeof(key->tp.dst))))
 979                 goto nla_put_failure;
 980
 981         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
 982             (fl_dump_key_val(skb, &key->enc_ipv4.src,
 983                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
 984                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 985                             sizeof(key->enc_ipv4.src)) ||
 986              fl_dump_key_val(skb, &key->enc_ipv4.dst,
 987                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
 988                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 989                              sizeof(key->enc_ipv4.dst))))
 990                 goto nla_put_failure;
 991         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
 992                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
 993                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
 994                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 995                             sizeof(key->enc_ipv6.src)) ||
 996                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
 997                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
 998                                  &mask->enc_ipv6.dst,
 999                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1000                             sizeof(key->enc_ipv6.dst))))
1001                 goto nla_put_failure;
1002
1003         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1004                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1005                             sizeof(key->enc_key_id)) ||
1006             fl_dump_key_val(skb, &key->enc_tp.src,
1007                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1008                             &mask->enc_tp.src,
1009                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1010                             sizeof(key->enc_tp.src)) ||
1011             fl_dump_key_val(skb, &key->enc_tp.dst,
1012                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1013                             &mask->enc_tp.dst,
1014                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1015                             sizeof(key->enc_tp.dst)))
1016                 goto nla_put_failure;
1017
1018         nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags);
1019
1020         if (tcf_exts_dump(skb, &f->exts))
1021                 goto nla_put_failure;
1022
1023         nla_nest_end(skb, nest);
1024
1025         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1026                 goto nla_put_failure;
1027
1028         return skb->len;
1029
1030 nla_put_failure:
1031         nla_nest_cancel(skb, nest);
1032         return -1;
1033 }
1034
1035 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1036         .kind           = "flower",
1037         .classify       = fl_classify,
1038         .init           = fl_init,
1039         .destroy        = fl_destroy,
1040         .get            = fl_get,
1041         .change         = fl_change,
1042         .delete         = fl_delete,
1043         .walk           = fl_walk,
1044         .dump           = fl_dump,
1045         .owner          = THIS_MODULE,
1046 };
1047
1048 static int __init cls_fl_init(void)
1049 {
1050         return register_tcf_proto_ops(&cls_fl_ops);
1051 }
1052
1053 static void __exit cls_fl_exit(void)
1054 {
1055         unregister_tcf_proto_ops(&cls_fl_ops);
1056 }
1057
1058 module_init(cls_fl_init);
1059 module_exit(cls_fl_exit);
1060
1061 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1062 MODULE_DESCRIPTION("Flower classifier");
1063 MODULE_LICENSE("GPL v2");