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