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_icmp icmp;
  43         struct flow_dissector_key_arp arp;
  44         struct flow_dissector_key_keyid enc_key_id;
  45         union {
  46                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  47                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  48         };
  49         struct flow_dissector_key_ports enc_tp;
  50 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  51
  52 struct fl_flow_mask_range {
  53         unsigned short int start;
  54         unsigned short int end;
  55 };
  56
  57 struct fl_flow_mask {
  58         struct fl_flow_key key;
  59         struct fl_flow_mask_range range;
  60         struct rcu_head rcu;
  61 };
  62
  63 struct cls_fl_head {
  64         struct rhashtable ht;
  65         struct fl_flow_mask mask;
  66         struct flow_dissector dissector;
  67         u32 hgen;
  68         bool mask_assigned;
  69         struct list_head filters;
  70         struct rhashtable_params ht_params;
  71         union {
  72                 struct work_struct work;
  73                 struct rcu_head rcu;
  74         };
  75 };
  76
  77 struct cls_fl_filter {
  78         struct rhash_head ht_node;
  79         struct fl_flow_key mkey;
  80         struct tcf_exts exts;
  81         struct tcf_result res;
  82         struct fl_flow_key key;
  83         struct list_head list;
  84         u32 handle;
  85         u32 flags;
  86         struct rcu_head rcu;
  87         struct tc_to_netdev tc;
  88         struct net_device *hw_dev;
  89 };
  90
  91 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
  92 {
  93         return mask->range.end - mask->range.start;
  94 }
  95
  96 static void fl_mask_update_range(struct fl_flow_mask *mask)
  97 {
  98         const u8 *bytes = (const u8 *) &mask->key;
  99         size_t size = sizeof(mask->key);
 100         size_t i, first = 0, last = size - 1;
 101
 102         for (i = 0; i < sizeof(mask->key); i++) {
 103                 if (bytes[i]) {
 104                         if (!first && i)
 105                                 first = i;
 106                         last = i;
 107                 }
 108         }
 109         mask->range.start = rounddown(first, sizeof(long));
 110         mask->range.end = roundup(last + 1, sizeof(long));
 111 }
 112
 113 static void *fl_key_get_start(struct fl_flow_key *key,
 114                               const struct fl_flow_mask *mask)
 115 {
 116         return (u8 *) key + mask->range.start;
 117 }
 118
 119 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 120                               struct fl_flow_mask *mask)
 121 {
 122         const long *lkey = fl_key_get_start(key, mask);
 123         const long *lmask = fl_key_get_start(&mask->key, mask);
 124         long *lmkey = fl_key_get_start(mkey, mask);
 125         int i;
 126
 127         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 128                 *lmkey++ = *lkey++ & *lmask++;
 129 }
 130
 131 static void fl_clear_masked_range(struct fl_flow_key *key,
 132                                   struct fl_flow_mask *mask)
 133 {
 134         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 135 }
 136
 137 static struct cls_fl_filter *fl_lookup(struct cls_fl_head *head,
 138                                        struct fl_flow_key *mkey)
 139 {
 140         return rhashtable_lookup_fast(&head->ht,
 141                                       fl_key_get_start(mkey, &head->mask),
 142                                       head->ht_params);
 143 }
 144
 145 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 146                        struct tcf_result *res)
 147 {
 148         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 149         struct cls_fl_filter *f;
 150         struct fl_flow_key skb_key;
 151         struct fl_flow_key skb_mkey;
 152         struct ip_tunnel_info *info;
 153
 154         if (!atomic_read(&head->ht.nelems))
 155                 return -1;
 156
 157         fl_clear_masked_range(&skb_key, &head->mask);
 158
 159         info = skb_tunnel_info(skb);
 160         if (info) {
 161                 struct ip_tunnel_key *key = &info->key;
 162
 163                 switch (ip_tunnel_info_af(info)) {
 164                 case AF_INET:
 165                         skb_key.enc_control.addr_type =
 166                                 FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 167                         skb_key.enc_ipv4.src = key->u.ipv4.src;
 168                         skb_key.enc_ipv4.dst = key->u.ipv4.dst;
 169                         break;
 170                 case AF_INET6:
 171                         skb_key.enc_control.addr_type =
 172                                 FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 173                         skb_key.enc_ipv6.src = key->u.ipv6.src;
 174                         skb_key.enc_ipv6.dst = key->u.ipv6.dst;
 175                         break;
 176                 }
 177
 178                 skb_key.enc_key_id.keyid = tunnel_id_to_key32(key->tun_id);
 179                 skb_key.enc_tp.src = key->tp_src;
 180                 skb_key.enc_tp.dst = key->tp_dst;
 181         }
 182
 183         skb_key.indev_ifindex = skb->skb_iif;
 184         /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
 185          * so do it rather here.
 186          */
 187         skb_key.basic.n_proto = skb->protocol;
 188         skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
 189
 190         fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
 191
 192         f = fl_lookup(head, &skb_mkey);
 193         if (f && !tc_skip_sw(f->flags)) {
 194                 *res = f->res;
 195                 return tcf_exts_exec(skb, &f->exts, res);
 196         }
 197         return -1;
 198 }
 199
 200 static int fl_init(struct tcf_proto *tp)
 201 {
 202         struct cls_fl_head *head;
 203
 204         head = kzalloc(sizeof(*head), GFP_KERNEL);
 205         if (!head)
 206                 return -ENOBUFS;
 207
 208         INIT_LIST_HEAD_RCU(&head->filters);
 209         rcu_assign_pointer(tp->root, head);
 210
 211         return 0;
 212 }
 213
 214 static void fl_destroy_filter(struct rcu_head *head)
 215 {
 216         struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
 217
 218         tcf_exts_destroy(&f->exts);
 219         kfree(f);
 220 }
 221
 222 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f)
 223 {
 224         struct tc_cls_flower_offload offload = {0};
 225         struct net_device *dev = f->hw_dev;
 226         struct tc_to_netdev *tc = &f->tc;
 227
 228         if (!tc_can_offload(dev, tp))
 229                 return;
 230
 231         offload.command = TC_CLSFLOWER_DESTROY;
 232         offload.prio = tp->prio;
 233         offload.cookie = (unsigned long)f;
 234
 235         tc->type = TC_SETUP_CLSFLOWER;
 236         tc->cls_flower = &offload;
 237
 238         dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
 239 }
 240
 241 static int fl_hw_replace_filter(struct tcf_proto *tp,
 242                                 struct flow_dissector *dissector,
 243                                 struct fl_flow_key *mask,
 244                                 struct cls_fl_filter *f)
 245 {
 246         struct net_device *dev = tp->q->dev_queue->dev;
 247         struct tc_cls_flower_offload offload = {0};
 248         struct tc_to_netdev *tc = &f->tc;
 249         int err;
 250
 251         if (!tc_can_offload(dev, tp)) {
 252                 if (tcf_exts_get_dev(dev, &f->exts, &f->hw_dev) ||
 253                     (f->hw_dev && !tc_can_offload(f->hw_dev, tp))) {
 254                         f->hw_dev = dev;
 255                         return tc_skip_sw(f->flags) ? -EINVAL : 0;
 256                 }
 257                 dev = f->hw_dev;
 258                 tc->egress_dev = true;
 259         } else {
 260                 f->hw_dev = dev;
 261         }
 262
 263         offload.command = TC_CLSFLOWER_REPLACE;
 264         offload.prio = tp->prio;
 265         offload.cookie = (unsigned long)f;
 266         offload.dissector = dissector;
 267         offload.mask = mask;
 268         offload.key = &f->mkey;
 269         offload.exts = &f->exts;
 270
 271         tc->type = TC_SETUP_CLSFLOWER;
 272         tc->cls_flower = &offload;
 273
 274         err = dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol,
 275                                             tc);
 276         if (!err)
 277                 f->flags |= TCA_CLS_FLAGS_IN_HW;
 278
 279         if (tc_skip_sw(f->flags))
 280                 return err;
 281         return 0;
 282 }
 283
 284 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 285 {
 286         struct tc_cls_flower_offload offload = {0};
 287         struct net_device *dev = f->hw_dev;
 288         struct tc_to_netdev *tc = &f->tc;
 289
 290         if (!tc_can_offload(dev, tp))
 291                 return;
 292
 293         offload.command = TC_CLSFLOWER_STATS;
 294         offload.prio = tp->prio;
 295         offload.cookie = (unsigned long)f;
 296         offload.exts = &f->exts;
 297
 298         tc->type = TC_SETUP_CLSFLOWER;
 299         tc->cls_flower = &offload;
 300
 301         dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, tp->protocol, tc);
 302 }
 303
 304 static void __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f)
 305 {
 306         list_del_rcu(&f->list);
 307         if (!tc_skip_hw(f->flags))
 308                 fl_hw_destroy_filter(tp, f);
 309         tcf_unbind_filter(tp, &f->res);
 310         call_rcu(&f->rcu, fl_destroy_filter);
 311 }
 312
 313 static void fl_destroy_sleepable(struct work_struct *work)
 314 {
 315         struct cls_fl_head *head = container_of(work, struct cls_fl_head,
 316                                                 work);
 317         if (head->mask_assigned)
 318                 rhashtable_destroy(&head->ht);
 319         kfree(head);
 320         module_put(THIS_MODULE);
 321 }
 322
 323 static void fl_destroy_rcu(struct rcu_head *rcu)
 324 {
 325         struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
 326
 327         INIT_WORK(&head->work, fl_destroy_sleepable);
 328         schedule_work(&head->work);
 329 }
 330
 331 static void fl_destroy(struct tcf_proto *tp)
 332 {
 333         struct cls_fl_head *head = rtnl_dereference(tp->root);
 334         struct cls_fl_filter *f, *next;
 335
 336         list_for_each_entry_safe(f, next, &head->filters, list)
 337                 __fl_delete(tp, f);
 338
 339         __module_get(THIS_MODULE);
 340         call_rcu(&head->rcu, fl_destroy_rcu);
 341 }
 342
 343 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
 344 {
 345         struct cls_fl_head *head = rtnl_dereference(tp->root);
 346         struct cls_fl_filter *f;
 347
 348         list_for_each_entry(f, &head->filters, list)
 349                 if (f->handle == handle)
 350                         return (unsigned long) f;
 351         return 0;
 352 }
 353
 354 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 355         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 356         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 357         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 358                                             .len = IFNAMSIZ },
 359         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 360         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 361         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 362         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 363         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 364         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 365         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 366         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 367         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 368         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 369         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 370         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 371         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 372         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 373         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 374         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 375         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 376         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 377         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 378         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 379         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 380         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 381         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 382         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 383         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 384         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 385         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 386         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 387         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 388         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 389         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 390         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 391         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 392         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 393         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 394         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 395         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 396         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 397         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 398         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 399         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 400         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 401         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 402         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 403         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 404         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 405         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 406         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 407         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 408         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 409         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 410         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 411         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 412         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 413         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 414         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 415         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 416         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 417         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 418         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 419         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 420         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 421 };
 422
 423 static void fl_set_key_val(struct nlattr **tb,
 424                            void *val, int val_type,
 425                            void *mask, int mask_type, int len)
 426 {
 427         if (!tb[val_type])
 428                 return;
 429         memcpy(val, nla_data(tb[val_type]), len);
 430         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 431                 memset(mask, 0xff, len);
 432         else
 433                 memcpy(mask, nla_data(tb[mask_type]), len);
 434 }
 435
 436 static void fl_set_key_vlan(struct nlattr **tb,
 437                             struct flow_dissector_key_vlan *key_val,
 438                             struct flow_dissector_key_vlan *key_mask)
 439 {
 440 #define VLAN_PRIORITY_MASK      0x7
 441
 442         if (tb[TCA_FLOWER_KEY_VLAN_ID]) {
 443                 key_val->vlan_id =
 444                         nla_get_u16(tb[TCA_FLOWER_KEY_VLAN_ID]) & VLAN_VID_MASK;
 445                 key_mask->vlan_id = VLAN_VID_MASK;
 446         }
 447         if (tb[TCA_FLOWER_KEY_VLAN_PRIO]) {
 448                 key_val->vlan_priority =
 449                         nla_get_u8(tb[TCA_FLOWER_KEY_VLAN_PRIO]) &
 450                         VLAN_PRIORITY_MASK;
 451                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 452         }
 453 }
 454
 455 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
 456                             u32 *dissector_key, u32 *dissector_mask,
 457                             u32 flower_flag_bit, u32 dissector_flag_bit)
 458 {
 459         if (flower_mask & flower_flag_bit) {
 460                 *dissector_mask |= dissector_flag_bit;
 461                 if (flower_key & flower_flag_bit)
 462                         *dissector_key |= dissector_flag_bit;
 463         }
 464 }
 465
 466 static int fl_set_key_flags(struct nlattr **tb,
 467                             u32 *flags_key, u32 *flags_mask)
 468 {
 469         u32 key, mask;
 470
 471         /* mask is mandatory for flags */
 472         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
 473                 return -EINVAL;
 474
 475         key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
 476         mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
 477
 478         *flags_key  = 0;
 479         *flags_mask = 0;
 480
 481         fl_set_key_flag(key, mask, flags_key, flags_mask,
 482                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
 483
 484         return 0;
 485 }
 486
 487 static int fl_set_key(struct net *net, struct nlattr **tb,
 488                       struct fl_flow_key *key, struct fl_flow_key *mask)
 489 {
 490         __be16 ethertype;
 491         int ret = 0;
 492 #ifdef CONFIG_NET_CLS_IND
 493         if (tb[TCA_FLOWER_INDEV]) {
 494                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
 495                 if (err < 0)
 496                         return err;
 497                 key->indev_ifindex = err;
 498                 mask->indev_ifindex = 0xffffffff;
 499         }
 500 #endif
 501
 502         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 503                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 504                        sizeof(key->eth.dst));
 505         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 506                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 507                        sizeof(key->eth.src));
 508
 509         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 510                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 511
 512                 if (ethertype == htons(ETH_P_8021Q)) {
 513                         fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
 514                         fl_set_key_val(tb, &key->basic.n_proto,
 515                                        TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 516                                        &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
 517                                        sizeof(key->basic.n_proto));
 518                 } else {
 519                         key->basic.n_proto = ethertype;
 520                         mask->basic.n_proto = cpu_to_be16(~0);
 521                 }
 522         }
 523
 524         if (key->basic.n_proto == htons(ETH_P_IP) ||
 525             key->basic.n_proto == htons(ETH_P_IPV6)) {
 526                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 527                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 528                                sizeof(key->basic.ip_proto));
 529         }
 530
 531         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 532                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 533                 mask->control.addr_type = ~0;
 534                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 535                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 536                                sizeof(key->ipv4.src));
 537                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 538                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 539                                sizeof(key->ipv4.dst));
 540         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 541                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 542                 mask->control.addr_type = ~0;
 543                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 544                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 545                                sizeof(key->ipv6.src));
 546                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 547                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 548                                sizeof(key->ipv6.dst));
 549         }
 550
 551         if (key->basic.ip_proto == IPPROTO_TCP) {
 552                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 553                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 554                                sizeof(key->tp.src));
 555                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 556                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 557                                sizeof(key->tp.dst));
 558         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 559                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 560                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 561                                sizeof(key->tp.src));
 562                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 563                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 564                                sizeof(key->tp.dst));
 565         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 566                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 567                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 568                                sizeof(key->tp.src));
 569                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 570                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 571                                sizeof(key->tp.dst));
 572         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
 573                    key->basic.ip_proto == IPPROTO_ICMP) {
 574                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
 575                                &mask->icmp.type,
 576                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
 577                                sizeof(key->icmp.type));
 578                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
 579                                &mask->icmp.code,
 580                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
 581                                sizeof(key->icmp.code));
 582         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
 583                    key->basic.ip_proto == IPPROTO_ICMPV6) {
 584                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
 585                                &mask->icmp.type,
 586                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
 587                                sizeof(key->icmp.type));
 588                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
 589                                &mask->icmp.code,
 590                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
 591                                sizeof(key->icmp.code));
 592         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
 593                    key->basic.n_proto == htons(ETH_P_RARP)) {
 594                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
 595                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
 596                                sizeof(key->arp.sip));
 597                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
 598                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
 599                                sizeof(key->arp.tip));
 600                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
 601                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
 602                                sizeof(key->arp.op));
 603                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
 604                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
 605                                sizeof(key->arp.sha));
 606                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
 607                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
 608                                sizeof(key->arp.tha));
 609         }
 610
 611         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
 612             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
 613                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 614                 mask->enc_control.addr_type = ~0;
 615                 fl_set_key_val(tb, &key->enc_ipv4.src,
 616                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
 617                                &mask->enc_ipv4.src,
 618                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
 619                                sizeof(key->enc_ipv4.src));
 620                 fl_set_key_val(tb, &key->enc_ipv4.dst,
 621                                TCA_FLOWER_KEY_ENC_IPV4_DST,
 622                                &mask->enc_ipv4.dst,
 623                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
 624                                sizeof(key->enc_ipv4.dst));
 625         }
 626
 627         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
 628             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
 629                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 630                 mask->enc_control.addr_type = ~0;
 631                 fl_set_key_val(tb, &key->enc_ipv6.src,
 632                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
 633                                &mask->enc_ipv6.src,
 634                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
 635                                sizeof(key->enc_ipv6.src));
 636                 fl_set_key_val(tb, &key->enc_ipv6.dst,
 637                                TCA_FLOWER_KEY_ENC_IPV6_DST,
 638                                &mask->enc_ipv6.dst,
 639                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
 640                                sizeof(key->enc_ipv6.dst));
 641         }
 642
 643         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
 644                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
 645                        sizeof(key->enc_key_id.keyid));
 646
 647         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
 648                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
 649                        sizeof(key->enc_tp.src));
 650
 651         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
 652                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
 653                        sizeof(key->enc_tp.dst));
 654
 655         if (tb[TCA_FLOWER_KEY_FLAGS])
 656                 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
 657
 658         return ret;
 659 }
 660
 661 static bool fl_mask_eq(struct fl_flow_mask *mask1,
 662                        struct fl_flow_mask *mask2)
 663 {
 664         const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
 665         const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
 666
 667         return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
 668                !memcmp(lmask1, lmask2, fl_mask_range(mask1));
 669 }
 670
 671 static const struct rhashtable_params fl_ht_params = {
 672         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
 673         .head_offset = offsetof(struct cls_fl_filter, ht_node),
 674         .automatic_shrinking = true,
 675 };
 676
 677 static int fl_init_hashtable(struct cls_fl_head *head,
 678                              struct fl_flow_mask *mask)
 679 {
 680         head->ht_params = fl_ht_params;
 681         head->ht_params.key_len = fl_mask_range(mask);
 682         head->ht_params.key_offset += mask->range.start;
 683
 684         return rhashtable_init(&head->ht, &head->ht_params);
 685 }
 686
 687 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
 688 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
 689
 690 #define FL_KEY_IS_MASKED(mask, member)                                          \
 691         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
 692                    0, FL_KEY_MEMBER_SIZE(member))                               \
 693
 694 #define FL_KEY_SET(keys, cnt, id, member)                                       \
 695         do {                                                                    \
 696                 keys[cnt].key_id = id;                                          \
 697                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
 698                 cnt++;                                                          \
 699         } while(0);
 700
 701 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
 702         do {                                                                    \
 703                 if (FL_KEY_IS_MASKED(mask, member))                             \
 704                         FL_KEY_SET(keys, cnt, id, member);                      \
 705         } while(0);
 706
 707 static void fl_init_dissector(struct cls_fl_head *head,
 708                               struct fl_flow_mask *mask)
 709 {
 710         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
 711         size_t cnt = 0;
 712
 713         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
 714         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
 715         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 716                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
 717         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 718                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
 719         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 720                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
 721         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 722                              FLOW_DISSECTOR_KEY_PORTS, tp);
 723         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 724                              FLOW_DISSECTOR_KEY_ICMP, icmp);
 725         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 726                              FLOW_DISSECTOR_KEY_ARP, arp);
 727         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 728                              FLOW_DISSECTOR_KEY_VLAN, vlan);
 729         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 730                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
 731         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 732                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
 733         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 734                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
 735         if (FL_KEY_IS_MASKED(&mask->key, enc_ipv4) ||
 736             FL_KEY_IS_MASKED(&mask->key, enc_ipv6))
 737                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
 738                            enc_control);
 739         FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
 740                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
 741
 742         skb_flow_dissector_init(&head->dissector, keys, cnt);
 743 }
 744
 745 static int fl_check_assign_mask(struct cls_fl_head *head,
 746                                 struct fl_flow_mask *mask)
 747 {
 748         int err;
 749
 750         if (head->mask_assigned) {
 751                 if (!fl_mask_eq(&head->mask, mask))
 752                         return -EINVAL;
 753                 else
 754                         return 0;
 755         }
 756
 757         /* Mask is not assigned yet. So assign it and init hashtable
 758          * according to that.
 759          */
 760         err = fl_init_hashtable(head, mask);
 761         if (err)
 762                 return err;
 763         memcpy(&head->mask, mask, sizeof(head->mask));
 764         head->mask_assigned = true;
 765
 766         fl_init_dissector(head, mask);
 767
 768         return 0;
 769 }
 770
 771 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
 772                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
 773                         unsigned long base, struct nlattr **tb,
 774                         struct nlattr *est, bool ovr)
 775 {
 776         struct tcf_exts e;
 777         int err;
 778
 779         err = tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
 780         if (err < 0)
 781                 return err;
 782         err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
 783         if (err < 0)
 784                 goto errout;
 785
 786         if (tb[TCA_FLOWER_CLASSID]) {
 787                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
 788                 tcf_bind_filter(tp, &f->res, base);
 789         }
 790
 791         err = fl_set_key(net, tb, &f->key, &mask->key);
 792         if (err)
 793                 goto errout;
 794
 795         fl_mask_update_range(mask);
 796         fl_set_masked_key(&f->mkey, &f->key, mask);
 797
 798         tcf_exts_change(tp, &f->exts, &e);
 799
 800         return 0;
 801 errout:
 802         tcf_exts_destroy(&e);
 803         return err;
 804 }
 805
 806 static u32 fl_grab_new_handle(struct tcf_proto *tp,
 807                               struct cls_fl_head *head)
 808 {
 809         unsigned int i = 0x80000000;
 810         u32 handle;
 811
 812         do {
 813                 if (++head->hgen == 0x7FFFFFFF)
 814                         head->hgen = 1;
 815         } while (--i > 0 && fl_get(tp, head->hgen));
 816
 817         if (unlikely(i == 0)) {
 818                 pr_err("Insufficient number of handles\n");
 819                 handle = 0;
 820         } else {
 821                 handle = head->hgen;
 822         }
 823
 824         return handle;
 825 }
 826
 827 static int fl_change(struct net *net, struct sk_buff *in_skb,
 828                      struct tcf_proto *tp, unsigned long base,
 829                      u32 handle, struct nlattr **tca,
 830                      unsigned long *arg, bool ovr)
 831 {
 832         struct cls_fl_head *head = rtnl_dereference(tp->root);
 833         struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
 834         struct cls_fl_filter *fnew;
 835         struct nlattr **tb;
 836         struct fl_flow_mask mask = {};
 837         int err;
 838
 839         if (!tca[TCA_OPTIONS])
 840                 return -EINVAL;
 841
 842         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
 843         if (!tb)
 844                 return -ENOBUFS;
 845
 846         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
 847                                fl_policy, NULL);
 848         if (err < 0)
 849                 goto errout_tb;
 850
 851         if (fold && handle && fold->handle != handle) {
 852                 err = -EINVAL;
 853                 goto errout_tb;
 854         }
 855
 856         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
 857         if (!fnew) {
 858                 err = -ENOBUFS;
 859                 goto errout_tb;
 860         }
 861
 862         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
 863         if (err < 0)
 864                 goto errout;
 865
 866         if (!handle) {
 867                 handle = fl_grab_new_handle(tp, head);
 868                 if (!handle) {
 869                         err = -EINVAL;
 870                         goto errout;
 871                 }
 872         }
 873         fnew->handle = handle;
 874
 875         if (tb[TCA_FLOWER_FLAGS]) {
 876                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
 877
 878                 if (!tc_flags_valid(fnew->flags)) {
 879                         err = -EINVAL;
 880                         goto errout;
 881                 }
 882         }
 883
 884         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
 885         if (err)
 886                 goto errout;
 887
 888         err = fl_check_assign_mask(head, &mask);
 889         if (err)
 890                 goto errout;
 891
 892         if (!tc_skip_sw(fnew->flags)) {
 893                 if (!fold && fl_lookup(head, &fnew->mkey)) {
 894                         err = -EEXIST;
 895                         goto errout;
 896                 }
 897
 898                 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
 899                                              head->ht_params);
 900                 if (err)
 901                         goto errout;
 902         }
 903
 904         if (!tc_skip_hw(fnew->flags)) {
 905                 err = fl_hw_replace_filter(tp,
 906                                            &head->dissector,
 907                                            &mask.key,
 908                                            fnew);
 909                 if (err)
 910                         goto errout;
 911         }
 912
 913         if (!tc_in_hw(fnew->flags))
 914                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
 915
 916         if (fold) {
 917                 if (!tc_skip_sw(fold->flags))
 918                         rhashtable_remove_fast(&head->ht, &fold->ht_node,
 919                                                head->ht_params);
 920                 if (!tc_skip_hw(fold->flags))
 921                         fl_hw_destroy_filter(tp, fold);
 922         }
 923
 924         *arg = (unsigned long) fnew;
 925
 926         if (fold) {
 927                 list_replace_rcu(&fold->list, &fnew->list);
 928                 tcf_unbind_filter(tp, &fold->res);
 929                 call_rcu(&fold->rcu, fl_destroy_filter);
 930         } else {
 931                 list_add_tail_rcu(&fnew->list, &head->filters);
 932         }
 933
 934         kfree(tb);
 935         return 0;
 936
 937 errout:
 938         tcf_exts_destroy(&fnew->exts);
 939         kfree(fnew);
 940 errout_tb:
 941         kfree(tb);
 942         return err;
 943 }
 944
 945 static int fl_delete(struct tcf_proto *tp, unsigned long arg, bool *last)
 946 {
 947         struct cls_fl_head *head = rtnl_dereference(tp->root);
 948         struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
 949
 950         if (!tc_skip_sw(f->flags))
 951                 rhashtable_remove_fast(&head->ht, &f->ht_node,
 952                                        head->ht_params);
 953         __fl_delete(tp, f);
 954         *last = list_empty(&head->filters);
 955         return 0;
 956 }
 957
 958 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
 959 {
 960         struct cls_fl_head *head = rtnl_dereference(tp->root);
 961         struct cls_fl_filter *f;
 962
 963         list_for_each_entry_rcu(f, &head->filters, list) {
 964                 if (arg->count < arg->skip)
 965                         goto skip;
 966                 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
 967                         arg->stop = 1;
 968                         break;
 969                 }
 970 skip:
 971                 arg->count++;
 972         }
 973 }
 974
 975 static int fl_dump_key_val(struct sk_buff *skb,
 976                            void *val, int val_type,
 977                            void *mask, int mask_type, int len)
 978 {
 979         int err;
 980
 981         if (!memchr_inv(mask, 0, len))
 982                 return 0;
 983         err = nla_put(skb, val_type, len, val);
 984         if (err)
 985                 return err;
 986         if (mask_type != TCA_FLOWER_UNSPEC) {
 987                 err = nla_put(skb, mask_type, len, mask);
 988                 if (err)
 989                         return err;
 990         }
 991         return 0;
 992 }
 993
 994 static int fl_dump_key_vlan(struct sk_buff *skb,
 995                             struct flow_dissector_key_vlan *vlan_key,
 996                             struct flow_dissector_key_vlan *vlan_mask)
 997 {
 998         int err;
 999
1000         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1001                 return 0;
1002         if (vlan_mask->vlan_id) {
1003                 err = nla_put_u16(skb, TCA_FLOWER_KEY_VLAN_ID,
1004                                   vlan_key->vlan_id);
1005                 if (err)
1006                         return err;
1007         }
1008         if (vlan_mask->vlan_priority) {
1009                 err = nla_put_u8(skb, TCA_FLOWER_KEY_VLAN_PRIO,
1010                                  vlan_key->vlan_priority);
1011                 if (err)
1012                         return err;
1013         }
1014         return 0;
1015 }
1016
1017 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1018                             u32 *flower_key, u32 *flower_mask,
1019                             u32 flower_flag_bit, u32 dissector_flag_bit)
1020 {
1021         if (dissector_mask & dissector_flag_bit) {
1022                 *flower_mask |= flower_flag_bit;
1023                 if (dissector_key & dissector_flag_bit)
1024                         *flower_key |= flower_flag_bit;
1025         }
1026 }
1027
1028 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1029 {
1030         u32 key, mask;
1031         __be32 _key, _mask;
1032         int err;
1033
1034         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1035                 return 0;
1036
1037         key = 0;
1038         mask = 0;
1039
1040         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1041                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1042
1043         _key = cpu_to_be32(key);
1044         _mask = cpu_to_be32(mask);
1045
1046         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1047         if (err)
1048                 return err;
1049
1050         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1051 }
1052
1053 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
1054                    struct sk_buff *skb, struct tcmsg *t)
1055 {
1056         struct cls_fl_head *head = rtnl_dereference(tp->root);
1057         struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
1058         struct nlattr *nest;
1059         struct fl_flow_key *key, *mask;
1060
1061         if (!f)
1062                 return skb->len;
1063
1064         t->tcm_handle = f->handle;
1065
1066         nest = nla_nest_start(skb, TCA_OPTIONS);
1067         if (!nest)
1068                 goto nla_put_failure;
1069
1070         if (f->res.classid &&
1071             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
1072                 goto nla_put_failure;
1073
1074         key = &f->key;
1075         mask = &head->mask.key;
1076
1077         if (mask->indev_ifindex) {
1078                 struct net_device *dev;
1079
1080                 dev = __dev_get_by_index(net, key->indev_ifindex);
1081                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1082                         goto nla_put_failure;
1083         }
1084
1085         if (!tc_skip_hw(f->flags))
1086                 fl_hw_update_stats(tp, f);
1087
1088         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1089                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1090                             sizeof(key->eth.dst)) ||
1091             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1092                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1093                             sizeof(key->eth.src)) ||
1094             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1095                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1096                             sizeof(key->basic.n_proto)))
1097                 goto nla_put_failure;
1098
1099         if (fl_dump_key_vlan(skb, &key->vlan, &mask->vlan))
1100                 goto nla_put_failure;
1101
1102         if ((key->basic.n_proto == htons(ETH_P_IP) ||
1103              key->basic.n_proto == htons(ETH_P_IPV6)) &&
1104             fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1105                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1106                             sizeof(key->basic.ip_proto)))
1107                 goto nla_put_failure;
1108
1109         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1110             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1111                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1112                              sizeof(key->ipv4.src)) ||
1113              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1114                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1115                              sizeof(key->ipv4.dst))))
1116                 goto nla_put_failure;
1117         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1118                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1119                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1120                                   sizeof(key->ipv6.src)) ||
1121                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1122                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1123                                   sizeof(key->ipv6.dst))))
1124                 goto nla_put_failure;
1125
1126         if (key->basic.ip_proto == IPPROTO_TCP &&
1127             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1128                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1129                              sizeof(key->tp.src)) ||
1130              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1131                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1132                              sizeof(key->tp.dst))))
1133                 goto nla_put_failure;
1134         else if (key->basic.ip_proto == IPPROTO_UDP &&
1135                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1136                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1137                                   sizeof(key->tp.src)) ||
1138                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1139                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1140                                   sizeof(key->tp.dst))))
1141                 goto nla_put_failure;
1142         else if (key->basic.ip_proto == IPPROTO_SCTP &&
1143                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1144                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1145                                   sizeof(key->tp.src)) ||
1146                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1147                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1148                                   sizeof(key->tp.dst))))
1149                 goto nla_put_failure;
1150         else if (key->basic.n_proto == htons(ETH_P_IP) &&
1151                  key->basic.ip_proto == IPPROTO_ICMP &&
1152                  (fl_dump_key_val(skb, &key->icmp.type,
1153                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1154                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1155                                   sizeof(key->icmp.type)) ||
1156                   fl_dump_key_val(skb, &key->icmp.code,
1157                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1158                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1159                                   sizeof(key->icmp.code))))
1160                 goto nla_put_failure;
1161         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1162                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
1163                  (fl_dump_key_val(skb, &key->icmp.type,
1164                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1165                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1166                                   sizeof(key->icmp.type)) ||
1167                   fl_dump_key_val(skb, &key->icmp.code,
1168                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1169                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1170                                   sizeof(key->icmp.code))))
1171                 goto nla_put_failure;
1172         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1173                   key->basic.n_proto == htons(ETH_P_RARP)) &&
1174                  (fl_dump_key_val(skb, &key->arp.sip,
1175                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1176                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
1177                                   sizeof(key->arp.sip)) ||
1178                   fl_dump_key_val(skb, &key->arp.tip,
1179                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1180                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
1181                                   sizeof(key->arp.tip)) ||
1182                   fl_dump_key_val(skb, &key->arp.op,
1183                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1184                                   TCA_FLOWER_KEY_ARP_OP_MASK,
1185                                   sizeof(key->arp.op)) ||
1186                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1187                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1188                                   sizeof(key->arp.sha)) ||
1189                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1190                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1191                                   sizeof(key->arp.tha))))
1192                 goto nla_put_failure;
1193
1194         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1195             (fl_dump_key_val(skb, &key->enc_ipv4.src,
1196                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1197                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1198                             sizeof(key->enc_ipv4.src)) ||
1199              fl_dump_key_val(skb, &key->enc_ipv4.dst,
1200                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1201                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1202                              sizeof(key->enc_ipv4.dst))))
1203                 goto nla_put_failure;
1204         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1205                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
1206                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1207                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1208                             sizeof(key->enc_ipv6.src)) ||
1209                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
1210                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
1211                                  &mask->enc_ipv6.dst,
1212                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1213                             sizeof(key->enc_ipv6.dst))))
1214                 goto nla_put_failure;
1215
1216         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1217                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1218                             sizeof(key->enc_key_id)) ||
1219             fl_dump_key_val(skb, &key->enc_tp.src,
1220                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1221                             &mask->enc_tp.src,
1222                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1223                             sizeof(key->enc_tp.src)) ||
1224             fl_dump_key_val(skb, &key->enc_tp.dst,
1225                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1226                             &mask->enc_tp.dst,
1227                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1228                             sizeof(key->enc_tp.dst)))
1229                 goto nla_put_failure;
1230
1231         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1232                 goto nla_put_failure;
1233
1234         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
1235                 goto nla_put_failure;
1236
1237         if (tcf_exts_dump(skb, &f->exts))
1238                 goto nla_put_failure;
1239
1240         nla_nest_end(skb, nest);
1241
1242         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
1243                 goto nla_put_failure;
1244
1245         return skb->len;
1246
1247 nla_put_failure:
1248         nla_nest_cancel(skb, nest);
1249         return -1;
1250 }
1251
1252 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
1253         .kind           = "flower",
1254         .classify       = fl_classify,
1255         .init           = fl_init,
1256         .destroy        = fl_destroy,
1257         .get            = fl_get,
1258         .change         = fl_change,
1259         .delete         = fl_delete,
1260         .walk           = fl_walk,
1261         .dump           = fl_dump,
1262         .owner          = THIS_MODULE,
1263 };
1264
1265 static int __init cls_fl_init(void)
1266 {
1267         return register_tcf_proto_ops(&cls_fl_ops);
1268 }
1269
1270 static void __exit cls_fl_exit(void)
1271 {
1272         unregister_tcf_proto_ops(&cls_fl_ops);
1273 }
1274
1275 module_init(cls_fl_init);
1276 module_exit(cls_fl_exit);
1277
1278 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
1279 MODULE_DESCRIPTION("Flower classifier");
1280 MODULE_LICENSE("GPL v2");