net/sched/cls_flower.c

   1 /*
   2  * net/sched/cls_flower.c               Flower classifier
   3  *
   4  * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <linux/rhashtable.h>
  16 #include <linux/workqueue.h>
  17
  18 #include <linux/if_ether.h>
  19 #include <linux/in6.h>
  20 #include <linux/ip.h>
  21 #include <linux/mpls.h>
  22
  23 #include <net/sch_generic.h>
  24 #include <net/pkt_cls.h>
  25 #include <net/ip.h>
  26 #include <net/flow_dissector.h>
  27 #include <net/geneve.h>
  28
  29 #include <net/dst.h>
  30 #include <net/dst_metadata.h>
  31
  32 struct fl_flow_key {
  33         int     indev_ifindex;
  34         struct flow_dissector_key_control control;
  35         struct flow_dissector_key_control enc_control;
  36         struct flow_dissector_key_basic basic;
  37         struct flow_dissector_key_eth_addrs eth;
  38         struct flow_dissector_key_vlan vlan;
  39         struct flow_dissector_key_vlan cvlan;
  40         union {
  41                 struct flow_dissector_key_ipv4_addrs ipv4;
  42                 struct flow_dissector_key_ipv6_addrs ipv6;
  43         };
  44         struct flow_dissector_key_ports tp;
  45         struct flow_dissector_key_icmp icmp;
  46         struct flow_dissector_key_arp arp;
  47         struct flow_dissector_key_keyid enc_key_id;
  48         union {
  49                 struct flow_dissector_key_ipv4_addrs enc_ipv4;
  50                 struct flow_dissector_key_ipv6_addrs enc_ipv6;
  51         };
  52         struct flow_dissector_key_ports enc_tp;
  53         struct flow_dissector_key_mpls mpls;
  54         struct flow_dissector_key_tcp tcp;
  55         struct flow_dissector_key_ip ip;
  56         struct flow_dissector_key_ip enc_ip;
  57         struct flow_dissector_key_enc_opts enc_opts;
  58         struct flow_dissector_key_ports tp_min;
  59         struct flow_dissector_key_ports tp_max;
  60 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
  61
  62 struct fl_flow_mask_range {
  63         unsigned short int start;
  64         unsigned short int end;
  65 };
  66
  67 struct fl_flow_mask {
  68         struct fl_flow_key key;
  69         struct fl_flow_mask_range range;
  70         u32 flags;
  71         struct rhash_head ht_node;
  72         struct rhashtable ht;
  73         struct rhashtable_params filter_ht_params;
  74         struct flow_dissector dissector;
  75         struct list_head filters;
  76         struct rcu_work rwork;
  77         struct list_head list;
  78 };
  79
  80 struct fl_flow_tmplt {
  81         struct fl_flow_key dummy_key;
  82         struct fl_flow_key mask;
  83         struct flow_dissector dissector;
  84         struct tcf_chain *chain;
  85 };
  86
  87 struct cls_fl_head {
  88         struct rhashtable ht;
  89         struct list_head masks;
  90         struct rcu_work rwork;
  91         struct idr handle_idr;
  92 };
  93
  94 struct cls_fl_filter {
  95         struct fl_flow_mask *mask;
  96         struct rhash_head ht_node;
  97         struct fl_flow_key mkey;
  98         struct tcf_exts exts;
  99         struct tcf_result res;
 100         struct fl_flow_key key;
 101         struct list_head list;
 102         u32 handle;
 103         u32 flags;
 104         u32 in_hw_count;
 105         struct rcu_work rwork;
 106         struct net_device *hw_dev;
 107 };
 108
 109 static const struct rhashtable_params mask_ht_params = {
 110         .key_offset = offsetof(struct fl_flow_mask, key),
 111         .key_len = sizeof(struct fl_flow_key),
 112         .head_offset = offsetof(struct fl_flow_mask, ht_node),
 113         .automatic_shrinking = true,
 114 };
 115
 116 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
 117 {
 118         return mask->range.end - mask->range.start;
 119 }
 120
 121 static void fl_mask_update_range(struct fl_flow_mask *mask)
 122 {
 123         const u8 *bytes = (const u8 *) &mask->key;
 124         size_t size = sizeof(mask->key);
 125         size_t i, first = 0, last;
 126
 127         for (i = 0; i < size; i++) {
 128                 if (bytes[i]) {
 129                         first = i;
 130                         break;
 131                 }
 132         }
 133         last = first;
 134         for (i = size - 1; i != first; i--) {
 135                 if (bytes[i]) {
 136                         last = i;
 137                         break;
 138                 }
 139         }
 140         mask->range.start = rounddown(first, sizeof(long));
 141         mask->range.end = roundup(last + 1, sizeof(long));
 142 }
 143
 144 static void *fl_key_get_start(struct fl_flow_key *key,
 145                               const struct fl_flow_mask *mask)
 146 {
 147         return (u8 *) key + mask->range.start;
 148 }
 149
 150 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
 151                               struct fl_flow_mask *mask)
 152 {
 153         const long *lkey = fl_key_get_start(key, mask);
 154         const long *lmask = fl_key_get_start(&mask->key, mask);
 155         long *lmkey = fl_key_get_start(mkey, mask);
 156         int i;
 157
 158         for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
 159                 *lmkey++ = *lkey++ & *lmask++;
 160 }
 161
 162 static bool fl_mask_fits_tmplt(struct fl_flow_tmplt *tmplt,
 163                                struct fl_flow_mask *mask)
 164 {
 165         const long *lmask = fl_key_get_start(&mask->key, mask);
 166         const long *ltmplt;
 167         int i;
 168
 169         if (!tmplt)
 170                 return true;
 171         ltmplt = fl_key_get_start(&tmplt->mask, mask);
 172         for (i = 0; i < fl_mask_range(mask); i += sizeof(long)) {
 173                 if (~*ltmplt++ & *lmask++)
 174                         return false;
 175         }
 176         return true;
 177 }
 178
 179 static void fl_clear_masked_range(struct fl_flow_key *key,
 180                                   struct fl_flow_mask *mask)
 181 {
 182         memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
 183 }
 184
 185 static bool fl_range_port_dst_cmp(struct cls_fl_filter *filter,
 186                                   struct fl_flow_key *key,
 187                                   struct fl_flow_key *mkey)
 188 {
 189         __be16 min_mask, max_mask, min_val, max_val;
 190
 191         min_mask = htons(filter->mask->key.tp_min.dst);
 192         max_mask = htons(filter->mask->key.tp_max.dst);
 193         min_val = htons(filter->key.tp_min.dst);
 194         max_val = htons(filter->key.tp_max.dst);
 195
 196         if (min_mask && max_mask) {
 197                 if (htons(key->tp.dst) < min_val ||
 198                     htons(key->tp.dst) > max_val)
 199                         return false;
 200
 201                 /* skb does not have min and max values */
 202                 mkey->tp_min.dst = filter->mkey.tp_min.dst;
 203                 mkey->tp_max.dst = filter->mkey.tp_max.dst;
 204         }
 205         return true;
 206 }
 207
 208 static bool fl_range_port_src_cmp(struct cls_fl_filter *filter,
 209                                   struct fl_flow_key *key,
 210                                   struct fl_flow_key *mkey)
 211 {
 212         __be16 min_mask, max_mask, min_val, max_val;
 213
 214         min_mask = htons(filter->mask->key.tp_min.src);
 215         max_mask = htons(filter->mask->key.tp_max.src);
 216         min_val = htons(filter->key.tp_min.src);
 217         max_val = htons(filter->key.tp_max.src);
 218
 219         if (min_mask && max_mask) {
 220                 if (htons(key->tp.src) < min_val ||
 221                     htons(key->tp.src) > max_val)
 222                         return false;
 223
 224                 /* skb does not have min and max values */
 225                 mkey->tp_min.src = filter->mkey.tp_min.src;
 226                 mkey->tp_max.src = filter->mkey.tp_max.src;
 227         }
 228         return true;
 229 }
 230
 231 static struct cls_fl_filter *__fl_lookup(struct fl_flow_mask *mask,
 232                                          struct fl_flow_key *mkey)
 233 {
 234         return rhashtable_lookup_fast(&mask->ht, fl_key_get_start(mkey, mask),
 235                                       mask->filter_ht_params);
 236 }
 237
 238 static struct cls_fl_filter *fl_lookup_range(struct fl_flow_mask *mask,
 239                                              struct fl_flow_key *mkey,
 240                                              struct fl_flow_key *key)
 241 {
 242         struct cls_fl_filter *filter, *f;
 243
 244         list_for_each_entry_rcu(filter, &mask->filters, list) {
 245                 if (!fl_range_port_dst_cmp(filter, key, mkey))
 246                         continue;
 247
 248                 if (!fl_range_port_src_cmp(filter, key, mkey))
 249                         continue;
 250
 251                 f = __fl_lookup(mask, mkey);
 252                 if (f)
 253                         return f;
 254         }
 255         return NULL;
 256 }
 257
 258 static struct cls_fl_filter *fl_lookup(struct fl_flow_mask *mask,
 259                                        struct fl_flow_key *mkey,
 260                                        struct fl_flow_key *key)
 261 {
 262         if ((mask->flags & TCA_FLOWER_MASK_FLAGS_RANGE))
 263                 return fl_lookup_range(mask, mkey, key);
 264
 265         return __fl_lookup(mask, mkey);
 266 }
 267
 268 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
 269                        struct tcf_result *res)
 270 {
 271         struct cls_fl_head *head = rcu_dereference_bh(tp->root);
 272         struct cls_fl_filter *f;
 273         struct fl_flow_mask *mask;
 274         struct fl_flow_key skb_key;
 275         struct fl_flow_key skb_mkey;
 276
 277         list_for_each_entry_rcu(mask, &head->masks, list) {
 278                 fl_clear_masked_range(&skb_key, mask);
 279
 280                 skb_key.indev_ifindex = skb->skb_iif;
 281                 /* skb_flow_dissect() does not set n_proto in case an unknown
 282                  * protocol, so do it rather here.
 283                  */
 284                 skb_key.basic.n_proto = skb->protocol;
 285                 skb_flow_dissect_tunnel_info(skb, &mask->dissector, &skb_key);
 286                 skb_flow_dissect(skb, &mask->dissector, &skb_key, 0);
 287
 288                 fl_set_masked_key(&skb_mkey, &skb_key, mask);
 289
 290                 f = fl_lookup(mask, &skb_mkey, &skb_key);
 291                 if (f && !tc_skip_sw(f->flags)) {
 292                         *res = f->res;
 293                         return tcf_exts_exec(skb, &f->exts, res);
 294                 }
 295         }
 296         return -1;
 297 }
 298
 299 static int fl_init(struct tcf_proto *tp)
 300 {
 301         struct cls_fl_head *head;
 302
 303         head = kzalloc(sizeof(*head), GFP_KERNEL);
 304         if (!head)
 305                 return -ENOBUFS;
 306
 307         INIT_LIST_HEAD_RCU(&head->masks);
 308         rcu_assign_pointer(tp->root, head);
 309         idr_init(&head->handle_idr);
 310
 311         return rhashtable_init(&head->ht, &mask_ht_params);
 312 }
 313
 314 static void fl_mask_free(struct fl_flow_mask *mask)
 315 {
 316         rhashtable_destroy(&mask->ht);
 317         kfree(mask);
 318 }
 319
 320 static void fl_mask_free_work(struct work_struct *work)
 321 {
 322         struct fl_flow_mask *mask = container_of(to_rcu_work(work),
 323                                                  struct fl_flow_mask, rwork);
 324
 325         fl_mask_free(mask);
 326 }
 327
 328 static bool fl_mask_put(struct cls_fl_head *head, struct fl_flow_mask *mask,
 329                         bool async)
 330 {
 331         if (!list_empty(&mask->filters))
 332                 return false;
 333
 334         rhashtable_remove_fast(&head->ht, &mask->ht_node, mask_ht_params);
 335         list_del_rcu(&mask->list);
 336         if (async)
 337                 tcf_queue_work(&mask->rwork, fl_mask_free_work);
 338         else
 339                 fl_mask_free(mask);
 340
 341         return true;
 342 }
 343
 344 static void __fl_destroy_filter(struct cls_fl_filter *f)
 345 {
 346         tcf_exts_destroy(&f->exts);
 347         tcf_exts_put_net(&f->exts);
 348         kfree(f);
 349 }
 350
 351 static void fl_destroy_filter_work(struct work_struct *work)
 352 {
 353         struct cls_fl_filter *f = container_of(to_rcu_work(work),
 354                                         struct cls_fl_filter, rwork);
 355
 356         rtnl_lock();
 357         __fl_destroy_filter(f);
 358         rtnl_unlock();
 359 }
 360
 361 static void fl_hw_destroy_filter(struct tcf_proto *tp, struct cls_fl_filter *f,
 362                                  struct netlink_ext_ack *extack)
 363 {
 364         struct tc_cls_flower_offload cls_flower = {};
 365         struct tcf_block *block = tp->chain->block;
 366
 367         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 368         cls_flower.command = TC_CLSFLOWER_DESTROY;
 369         cls_flower.cookie = (unsigned long) f;
 370
 371         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
 372         tcf_block_offload_dec(block, &f->flags);
 373 }
 374
 375 static int fl_hw_replace_filter(struct tcf_proto *tp,
 376                                 struct cls_fl_filter *f,
 377                                 struct netlink_ext_ack *extack)
 378 {
 379         struct tc_cls_flower_offload cls_flower = {};
 380         struct tcf_block *block = tp->chain->block;
 381         bool skip_sw = tc_skip_sw(f->flags);
 382         int err;
 383
 384         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 385         cls_flower.command = TC_CLSFLOWER_REPLACE;
 386         cls_flower.cookie = (unsigned long) f;
 387         cls_flower.dissector = &f->mask->dissector;
 388         cls_flower.mask = &f->mask->key;
 389         cls_flower.key = &f->mkey;
 390         cls_flower.exts = &f->exts;
 391         cls_flower.classid = f->res.classid;
 392
 393         err = tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw);
 394         if (err < 0) {
 395                 fl_hw_destroy_filter(tp, f, NULL);
 396                 return err;
 397         } else if (err > 0) {
 398                 f->in_hw_count = err;
 399                 tcf_block_offload_inc(block, &f->flags);
 400         }
 401
 402         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 403                 return -EINVAL;
 404
 405         return 0;
 406 }
 407
 408 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 409 {
 410         struct tc_cls_flower_offload cls_flower = {};
 411         struct tcf_block *block = tp->chain->block;
 412
 413         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
 414         cls_flower.command = TC_CLSFLOWER_STATS;
 415         cls_flower.cookie = (unsigned long) f;
 416         cls_flower.exts = &f->exts;
 417         cls_flower.classid = f->res.classid;
 418
 419         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
 420 }
 421
 422 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
 423                         struct netlink_ext_ack *extack)
 424 {
 425         struct cls_fl_head *head = rtnl_dereference(tp->root);
 426         bool async = tcf_exts_get_net(&f->exts);
 427         bool last;
 428
 429         idr_remove(&head->handle_idr, f->handle);
 430         list_del_rcu(&f->list);
 431         last = fl_mask_put(head, f->mask, async);
 432         if (!tc_skip_hw(f->flags))
 433                 fl_hw_destroy_filter(tp, f, extack);
 434         tcf_unbind_filter(tp, &f->res);
 435         if (async)
 436                 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
 437         else
 438                 __fl_destroy_filter(f);
 439
 440         return last;
 441 }
 442
 443 static void fl_destroy_sleepable(struct work_struct *work)
 444 {
 445         struct cls_fl_head *head = container_of(to_rcu_work(work),
 446                                                 struct cls_fl_head,
 447                                                 rwork);
 448
 449         rhashtable_destroy(&head->ht);
 450         kfree(head);
 451         module_put(THIS_MODULE);
 452 }
 453
 454 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
 455 {
 456         struct cls_fl_head *head = rtnl_dereference(tp->root);
 457         struct fl_flow_mask *mask, *next_mask;
 458         struct cls_fl_filter *f, *next;
 459
 460         list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
 461                 list_for_each_entry_safe(f, next, &mask->filters, list) {
 462                         if (__fl_delete(tp, f, extack))
 463                                 break;
 464                 }
 465         }
 466         idr_destroy(&head->handle_idr);
 467
 468         __module_get(THIS_MODULE);
 469         tcf_queue_work(&head->rwork, fl_destroy_sleepable);
 470 }
 471
 472 static void *fl_get(struct tcf_proto *tp, u32 handle)
 473 {
 474         struct cls_fl_head *head = rtnl_dereference(tp->root);
 475
 476         return idr_find(&head->handle_idr, handle);
 477 }
 478
 479 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 480         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 481         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 482         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 483                                             .len = IFNAMSIZ },
 484         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 485         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 486         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 487         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 488         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 489         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 490         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 491         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 492         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 493         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 494         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 495         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 496         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 497         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 498         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 499         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 500         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 501         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 502         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 503         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 504         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 505         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 506         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 507         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 508         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 509         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 510         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 511         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 512         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 513         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 514         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 515         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 516         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 517         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 518         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 519         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 520         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 521         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 522         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 523         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 524         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 525         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 526         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 527         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 528         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 529         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 530         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 531         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 532         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 533         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 534         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 535         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 536         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 537         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 538         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 539         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 540         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 541         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 542         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 543         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 544         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 545         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 546         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 547         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 548         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 549         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 550         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 551         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 552         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 553         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 554         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 555         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 556         [TCA_FLOWER_KEY_CVLAN_ID]       = { .type = NLA_U16 },
 557         [TCA_FLOWER_KEY_CVLAN_PRIO]     = { .type = NLA_U8 },
 558         [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
 559         [TCA_FLOWER_KEY_ENC_IP_TOS]     = { .type = NLA_U8 },
 560         [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
 561         [TCA_FLOWER_KEY_ENC_IP_TTL]      = { .type = NLA_U8 },
 562         [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
 563         [TCA_FLOWER_KEY_ENC_OPTS]       = { .type = NLA_NESTED },
 564         [TCA_FLOWER_KEY_ENC_OPTS_MASK]  = { .type = NLA_NESTED },
 565 };
 566
 567 static const struct nla_policy
 568 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
 569         [TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
 570 };
 571
 572 static const struct nla_policy
 573 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
 574         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
 575         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
 576         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
 577                                                        .len = 128 },
 578 };
 579
 580 static void fl_set_key_val(struct nlattr **tb,
 581                            void *val, int val_type,
 582                            void *mask, int mask_type, int len)
 583 {
 584         if (!tb[val_type])
 585                 return;
 586         memcpy(val, nla_data(tb[val_type]), len);
 587         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 588                 memset(mask, 0xff, len);
 589         else
 590                 memcpy(mask, nla_data(tb[mask_type]), len);
 591 }
 592
 593 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
 594                                  struct fl_flow_key *mask)
 595 {
 596         fl_set_key_val(tb, &key->tp_min.dst,
 597                        TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_min.dst,
 598                        TCA_FLOWER_UNSPEC, sizeof(key->tp_min.dst));
 599         fl_set_key_val(tb, &key->tp_max.dst,
 600                        TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_max.dst,
 601                        TCA_FLOWER_UNSPEC, sizeof(key->tp_max.dst));
 602         fl_set_key_val(tb, &key->tp_min.src,
 603                        TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_min.src,
 604                        TCA_FLOWER_UNSPEC, sizeof(key->tp_min.src));
 605         fl_set_key_val(tb, &key->tp_max.src,
 606                        TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_max.src,
 607                        TCA_FLOWER_UNSPEC, sizeof(key->tp_max.src));
 608
 609         if ((mask->tp_min.dst && mask->tp_max.dst &&
 610              htons(key->tp_max.dst) <= htons(key->tp_min.dst)) ||
 611              (mask->tp_min.src && mask->tp_max.src &&
 612               htons(key->tp_max.src) <= htons(key->tp_min.src)))
 613                 return -EINVAL;
 614
 615         return 0;
 616 }
 617
 618 static int fl_set_key_mpls(struct nlattr **tb,
 619                            struct flow_dissector_key_mpls *key_val,
 620                            struct flow_dissector_key_mpls *key_mask)
 621 {
 622         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 623                 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 624                 key_mask->mpls_ttl = MPLS_TTL_MASK;
 625         }
 626         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 627                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 628
 629                 if (bos & ~MPLS_BOS_MASK)
 630                         return -EINVAL;
 631                 key_val->mpls_bos = bos;
 632                 key_mask->mpls_bos = MPLS_BOS_MASK;
 633         }
 634         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
 635                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
 636
 637                 if (tc & ~MPLS_TC_MASK)
 638                         return -EINVAL;
 639                 key_val->mpls_tc = tc;
 640                 key_mask->mpls_tc = MPLS_TC_MASK;
 641         }
 642         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 643                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
 644
 645                 if (label & ~MPLS_LABEL_MASK)
 646                         return -EINVAL;
 647                 key_val->mpls_label = label;
 648                 key_mask->mpls_label = MPLS_LABEL_MASK;
 649         }
 650         return 0;
 651 }
 652
 653 static void fl_set_key_vlan(struct nlattr **tb,
 654                             __be16 ethertype,
 655                             int vlan_id_key, int vlan_prio_key,
 656                             struct flow_dissector_key_vlan *key_val,
 657                             struct flow_dissector_key_vlan *key_mask)
 658 {
 659 #define VLAN_PRIORITY_MASK      0x7
 660
 661         if (tb[vlan_id_key]) {
 662                 key_val->vlan_id =
 663                         nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
 664                 key_mask->vlan_id = VLAN_VID_MASK;
 665         }
 666         if (tb[vlan_prio_key]) {
 667                 key_val->vlan_priority =
 668                         nla_get_u8(tb[vlan_prio_key]) &
 669                         VLAN_PRIORITY_MASK;
 670                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 671         }
 672         key_val->vlan_tpid = ethertype;
 673         key_mask->vlan_tpid = cpu_to_be16(~0);
 674 }
 675
 676 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
 677                             u32 *dissector_key, u32 *dissector_mask,
 678                             u32 flower_flag_bit, u32 dissector_flag_bit)
 679 {
 680         if (flower_mask & flower_flag_bit) {
 681                 *dissector_mask |= dissector_flag_bit;
 682                 if (flower_key & flower_flag_bit)
 683                         *dissector_key |= dissector_flag_bit;
 684         }
 685 }
 686
 687 static int fl_set_key_flags(struct nlattr **tb,
 688                             u32 *flags_key, u32 *flags_mask)
 689 {
 690         u32 key, mask;
 691
 692         /* mask is mandatory for flags */
 693         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
 694                 return -EINVAL;
 695
 696         key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
 697         mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
 698
 699         *flags_key  = 0;
 700         *flags_mask = 0;
 701
 702         fl_set_key_flag(key, mask, flags_key, flags_mask,
 703                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
 704         fl_set_key_flag(key, mask, flags_key, flags_mask,
 705                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
 706                         FLOW_DIS_FIRST_FRAG);
 707
 708         return 0;
 709 }
 710
 711 static void fl_set_key_ip(struct nlattr **tb, bool encap,
 712                           struct flow_dissector_key_ip *key,
 713                           struct flow_dissector_key_ip *mask)
 714 {
 715         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
 716         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
 717         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
 718         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
 719
 720         fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
 721         fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
 722 }
 723
 724 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
 725                              int depth, int option_len,
 726                              struct netlink_ext_ack *extack)
 727 {
 728         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
 729         struct nlattr *class = NULL, *type = NULL, *data = NULL;
 730         struct geneve_opt *opt;
 731         int err, data_len = 0;
 732
 733         if (option_len > sizeof(struct geneve_opt))
 734                 data_len = option_len - sizeof(struct geneve_opt);
 735
 736         opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
 737         memset(opt, 0xff, option_len);
 738         opt->length = data_len / 4;
 739         opt->r1 = 0;
 740         opt->r2 = 0;
 741         opt->r3 = 0;
 742
 743         /* If no mask has been prodived we assume an exact match. */
 744         if (!depth)
 745                 return sizeof(struct geneve_opt) + data_len;
 746
 747         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
 748                 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
 749                 return -EINVAL;
 750         }
 751
 752         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
 753                                nla, geneve_opt_policy, extack);
 754         if (err < 0)
 755                 return err;
 756
 757         /* We are not allowed to omit any of CLASS, TYPE or DATA
 758          * fields from the key.
 759          */
 760         if (!option_len &&
 761             (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
 762              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
 763              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
 764                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
 765                 return -EINVAL;
 766         }
 767
 768         /* Omitting any of CLASS, TYPE or DATA fields is allowed
 769          * for the mask.
 770          */
 771         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
 772                 int new_len = key->enc_opts.len;
 773
 774                 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
 775                 data_len = nla_len(data);
 776                 if (data_len < 4) {
 777                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
 778                         return -ERANGE;
 779                 }
 780                 if (data_len % 4) {
 781                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
 782                         return -ERANGE;
 783                 }
 784
 785                 new_len += sizeof(struct geneve_opt) + data_len;
 786                 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
 787                 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
 788                         NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
 789                         return -ERANGE;
 790                 }
 791                 opt->length = data_len / 4;
 792                 memcpy(opt->opt_data, nla_data(data), data_len);
 793         }
 794
 795         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
 796                 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
 797                 opt->opt_class = nla_get_be16(class);
 798         }
 799
 800         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
 801                 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
 802                 opt->type = nla_get_u8(type);
 803         }
 804
 805         return sizeof(struct geneve_opt) + data_len;
 806 }
 807
 808 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
 809                           struct fl_flow_key *mask,
 810                           struct netlink_ext_ack *extack)
 811 {
 812         const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
 813         int err, option_len, key_depth, msk_depth = 0;
 814
 815         err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS],
 816                                   TCA_FLOWER_KEY_ENC_OPTS_MAX,
 817                                   enc_opts_policy, extack);
 818         if (err)
 819                 return err;
 820
 821         nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
 822
 823         if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
 824                 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
 825                                           TCA_FLOWER_KEY_ENC_OPTS_MAX,
 826                                           enc_opts_policy, extack);
 827                 if (err)
 828                         return err;
 829
 830                 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
 831                 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
 832         }
 833
 834         nla_for_each_attr(nla_opt_key, nla_enc_key,
 835                           nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
 836                 switch (nla_type(nla_opt_key)) {
 837                 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
 838                         option_len = 0;
 839                         key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
 840                         option_len = fl_set_geneve_opt(nla_opt_key, key,
 841                                                        key_depth, option_len,
 842                                                        extack);
 843                         if (option_len < 0)
 844                                 return option_len;
 845
 846                         key->enc_opts.len += option_len;
 847                         /* At the same time we need to parse through the mask
 848                          * in order to verify exact and mask attribute lengths.
 849                          */
 850                         mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
 851                         option_len = fl_set_geneve_opt(nla_opt_msk, mask,
 852                                                        msk_depth, option_len,
 853                                                        extack);
 854                         if (option_len < 0)
 855                                 return option_len;
 856
 857                         mask->enc_opts.len += option_len;
 858                         if (key->enc_opts.len != mask->enc_opts.len) {
 859                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
 860                                 return -EINVAL;
 861                         }
 862
 863                         if (msk_depth)
 864                                 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
 865                         break;
 866                 default:
 867                         NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
 868                         return -EINVAL;
 869                 }
 870         }
 871
 872         return 0;
 873 }
 874
 875 static int fl_set_key(struct net *net, struct nlattr **tb,
 876                       struct fl_flow_key *key, struct fl_flow_key *mask,
 877                       struct netlink_ext_ack *extack)
 878 {
 879         __be16 ethertype;
 880         int ret = 0;
 881 #ifdef CONFIG_NET_CLS_IND
 882         if (tb[TCA_FLOWER_INDEV]) {
 883                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
 884                 if (err < 0)
 885                         return err;
 886                 key->indev_ifindex = err;
 887                 mask->indev_ifindex = 0xffffffff;
 888         }
 889 #endif
 890
 891         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 892                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 893                        sizeof(key->eth.dst));
 894         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 895                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 896                        sizeof(key->eth.src));
 897
 898         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 899                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 900
 901                 if (eth_type_vlan(ethertype)) {
 902                         fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
 903                                         TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
 904                                         &mask->vlan);
 905
 906                         if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
 907                                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
 908                                 if (eth_type_vlan(ethertype)) {
 909                                         fl_set_key_vlan(tb, ethertype,
 910                                                         TCA_FLOWER_KEY_CVLAN_ID,
 911                                                         TCA_FLOWER_KEY_CVLAN_PRIO,
 912                                                         &key->cvlan, &mask->cvlan);
 913                                         fl_set_key_val(tb, &key->basic.n_proto,
 914                                                        TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
 915                                                        &mask->basic.n_proto,
 916                                                        TCA_FLOWER_UNSPEC,
 917                                                        sizeof(key->basic.n_proto));
 918                                 } else {
 919                                         key->basic.n_proto = ethertype;
 920                                         mask->basic.n_proto = cpu_to_be16(~0);
 921                                 }
 922                         }
 923                 } else {
 924                         key->basic.n_proto = ethertype;
 925                         mask->basic.n_proto = cpu_to_be16(~0);
 926                 }
 927         }
 928
 929         if (key->basic.n_proto == htons(ETH_P_IP) ||
 930             key->basic.n_proto == htons(ETH_P_IPV6)) {
 931                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 932                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 933                                sizeof(key->basic.ip_proto));
 934                 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
 935         }
 936
 937         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 938                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 939                 mask->control.addr_type = ~0;
 940                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 941                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 942                                sizeof(key->ipv4.src));
 943                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 944                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 945                                sizeof(key->ipv4.dst));
 946         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 947                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 948                 mask->control.addr_type = ~0;
 949                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 950                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 951                                sizeof(key->ipv6.src));
 952                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 953                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 954                                sizeof(key->ipv6.dst));
 955         }
 956
 957         if (key->basic.ip_proto == IPPROTO_TCP) {
 958                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 959                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 960                                sizeof(key->tp.src));
 961                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 962                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 963                                sizeof(key->tp.dst));
 964                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
 965                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
 966                                sizeof(key->tcp.flags));
 967         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 968                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 969                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 970                                sizeof(key->tp.src));
 971                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 972                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 973                                sizeof(key->tp.dst));
 974         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 975                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 976                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 977                                sizeof(key->tp.src));
 978                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 979                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 980                                sizeof(key->tp.dst));
 981         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
 982                    key->basic.ip_proto == IPPROTO_ICMP) {
 983                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
 984                                &mask->icmp.type,
 985                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
 986                                sizeof(key->icmp.type));
 987                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
 988                                &mask->icmp.code,
 989                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
 990                                sizeof(key->icmp.code));
 991         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
 992                    key->basic.ip_proto == IPPROTO_ICMPV6) {
 993                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
 994                                &mask->icmp.type,
 995                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
 996                                sizeof(key->icmp.type));
 997                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
 998                                &mask->icmp.code,
 999                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1000                                sizeof(key->icmp.code));
1001         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1002                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1003                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
1004                 if (ret)
1005                         return ret;
1006         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1007                    key->basic.n_proto == htons(ETH_P_RARP)) {
1008                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1009                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1010                                sizeof(key->arp.sip));
1011                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1012                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1013                                sizeof(key->arp.tip));
1014                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1015                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1016                                sizeof(key->arp.op));
1017                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1018                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1019                                sizeof(key->arp.sha));
1020                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1021                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1022                                sizeof(key->arp.tha));
1023         }
1024
1025         if (key->basic.ip_proto == IPPROTO_TCP ||
1026             key->basic.ip_proto == IPPROTO_UDP ||
1027             key->basic.ip_proto == IPPROTO_SCTP) {
1028                 ret = fl_set_key_port_range(tb, key, mask);
1029                 if (ret)
1030                         return ret;
1031         }
1032
1033         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1034             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1035                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1036                 mask->enc_control.addr_type = ~0;
1037                 fl_set_key_val(tb, &key->enc_ipv4.src,
1038                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
1039                                &mask->enc_ipv4.src,
1040                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1041                                sizeof(key->enc_ipv4.src));
1042                 fl_set_key_val(tb, &key->enc_ipv4.dst,
1043                                TCA_FLOWER_KEY_ENC_IPV4_DST,
1044                                &mask->enc_ipv4.dst,
1045                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1046                                sizeof(key->enc_ipv4.dst));
1047         }
1048
1049         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1050             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1051                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1052                 mask->enc_control.addr_type = ~0;
1053                 fl_set_key_val(tb, &key->enc_ipv6.src,
1054                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
1055                                &mask->enc_ipv6.src,
1056                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1057                                sizeof(key->enc_ipv6.src));
1058                 fl_set_key_val(tb, &key->enc_ipv6.dst,
1059                                TCA_FLOWER_KEY_ENC_IPV6_DST,
1060                                &mask->enc_ipv6.dst,
1061                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1062                                sizeof(key->enc_ipv6.dst));
1063         }
1064
1065         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1066                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1067                        sizeof(key->enc_key_id.keyid));
1068
1069         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1070                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1071                        sizeof(key->enc_tp.src));
1072
1073         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1074                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1075                        sizeof(key->enc_tp.dst));
1076
1077         fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1078
1079         if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1080                 ret = fl_set_enc_opt(tb, key, mask, extack);
1081                 if (ret)
1082                         return ret;
1083         }
1084
1085         if (tb[TCA_FLOWER_KEY_FLAGS])
1086                 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
1087
1088         return ret;
1089 }
1090
1091 static void fl_mask_copy(struct fl_flow_mask *dst,
1092                          struct fl_flow_mask *src)
1093 {
1094         const void *psrc = fl_key_get_start(&src->key, src);
1095         void *pdst = fl_key_get_start(&dst->key, src);
1096
1097         memcpy(pdst, psrc, fl_mask_range(src));
1098         dst->range = src->range;
1099 }
1100
1101 static const struct rhashtable_params fl_ht_params = {
1102         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1103         .head_offset = offsetof(struct cls_fl_filter, ht_node),
1104         .automatic_shrinking = true,
1105 };
1106
1107 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1108 {
1109         mask->filter_ht_params = fl_ht_params;
1110         mask->filter_ht_params.key_len = fl_mask_range(mask);
1111         mask->filter_ht_params.key_offset += mask->range.start;
1112
1113         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1114 }
1115
1116 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1117 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member)
1118
1119 #define FL_KEY_IS_MASKED(mask, member)                                          \
1120         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
1121                    0, FL_KEY_MEMBER_SIZE(member))                               \
1122
1123 #define FL_KEY_SET(keys, cnt, id, member)                                       \
1124         do {                                                                    \
1125                 keys[cnt].key_id = id;                                          \
1126                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
1127                 cnt++;                                                          \
1128         } while(0);
1129
1130 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
1131         do {                                                                    \
1132                 if (FL_KEY_IS_MASKED(mask, member))                             \
1133                         FL_KEY_SET(keys, cnt, id, member);                      \
1134         } while(0);
1135
1136 static void fl_init_dissector(struct flow_dissector *dissector,
1137                               struct fl_flow_key *mask)
1138 {
1139         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1140         size_t cnt = 0;
1141
1142         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1143         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1144         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1145                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1146         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1147                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1148         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1149                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1150         if (FL_KEY_IS_MASKED(mask, tp) ||
1151             FL_KEY_IS_MASKED(mask, tp_min) || FL_KEY_IS_MASKED(mask, tp_max))
1152                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp);
1153         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1154                              FLOW_DISSECTOR_KEY_IP, ip);
1155         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1156                              FLOW_DISSECTOR_KEY_TCP, tcp);
1157         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1158                              FLOW_DISSECTOR_KEY_ICMP, icmp);
1159         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1160                              FLOW_DISSECTOR_KEY_ARP, arp);
1161         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1162                              FLOW_DISSECTOR_KEY_MPLS, mpls);
1163         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1164                              FLOW_DISSECTOR_KEY_VLAN, vlan);
1165         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1166                              FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1167         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1168                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1169         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1170                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1171         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1172                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1173         if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1174             FL_KEY_IS_MASKED(mask, enc_ipv6))
1175                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1176                            enc_control);
1177         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1178                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1179         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1180                              FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1181         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1182                              FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1183
1184         skb_flow_dissector_init(dissector, keys, cnt);
1185 }
1186
1187 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1188                                                struct fl_flow_mask *mask)
1189 {
1190         struct fl_flow_mask *newmask;
1191         int err;
1192
1193         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1194         if (!newmask)
1195                 return ERR_PTR(-ENOMEM);
1196
1197         fl_mask_copy(newmask, mask);
1198
1199         if ((newmask->key.tp_min.dst && newmask->key.tp_max.dst) ||
1200             (newmask->key.tp_min.src && newmask->key.tp_max.src))
1201                 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1202
1203         err = fl_init_mask_hashtable(newmask);
1204         if (err)
1205                 goto errout_free;
1206
1207         fl_init_dissector(&newmask->dissector, &newmask->key);
1208
1209         INIT_LIST_HEAD_RCU(&newmask->filters);
1210
1211         err = rhashtable_insert_fast(&head->ht, &newmask->ht_node,
1212                                      mask_ht_params);
1213         if (err)
1214                 goto errout_destroy;
1215
1216         list_add_tail_rcu(&newmask->list, &head->masks);
1217
1218         return newmask;
1219
1220 errout_destroy:
1221         rhashtable_destroy(&newmask->ht);
1222 errout_free:
1223         kfree(newmask);
1224
1225         return ERR_PTR(err);
1226 }
1227
1228 static int fl_check_assign_mask(struct cls_fl_head *head,
1229                                 struct cls_fl_filter *fnew,
1230                                 struct cls_fl_filter *fold,
1231                                 struct fl_flow_mask *mask)
1232 {
1233         struct fl_flow_mask *newmask;
1234
1235         fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params);
1236         if (!fnew->mask) {
1237                 if (fold)
1238                         return -EINVAL;
1239
1240                 newmask = fl_create_new_mask(head, mask);
1241                 if (IS_ERR(newmask))
1242                         return PTR_ERR(newmask);
1243
1244                 fnew->mask = newmask;
1245         } else if (fold && fold->mask != fnew->mask) {
1246                 return -EINVAL;
1247         }
1248
1249         return 0;
1250 }
1251
1252 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1253                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
1254                         unsigned long base, struct nlattr **tb,
1255                         struct nlattr *est, bool ovr,
1256                         struct fl_flow_tmplt *tmplt,
1257                         struct netlink_ext_ack *extack)
1258 {
1259         int err;
1260
1261         err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
1262         if (err < 0)
1263                 return err;
1264
1265         if (tb[TCA_FLOWER_CLASSID]) {
1266                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1267                 tcf_bind_filter(tp, &f->res, base);
1268         }
1269
1270         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1271         if (err)
1272                 return err;
1273
1274         fl_mask_update_range(mask);
1275         fl_set_masked_key(&f->mkey, &f->key, mask);
1276
1277         if (!fl_mask_fits_tmplt(tmplt, mask)) {
1278                 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1279                 return -EINVAL;
1280         }
1281
1282         return 0;
1283 }
1284
1285 static int fl_change(struct net *net, struct sk_buff *in_skb,
1286                      struct tcf_proto *tp, unsigned long base,
1287                      u32 handle, struct nlattr **tca,
1288                      void **arg, bool ovr, struct netlink_ext_ack *extack)
1289 {
1290         struct cls_fl_head *head = rtnl_dereference(tp->root);
1291         struct cls_fl_filter *fold = *arg;
1292         struct cls_fl_filter *fnew;
1293         struct nlattr **tb;
1294         struct fl_flow_mask mask = {};
1295         int err;
1296
1297         if (!tca[TCA_OPTIONS])
1298                 return -EINVAL;
1299
1300         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1301         if (!tb)
1302                 return -ENOBUFS;
1303
1304         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
1305                                fl_policy, NULL);
1306         if (err < 0)
1307                 goto errout_tb;
1308
1309         if (fold && handle && fold->handle != handle) {
1310                 err = -EINVAL;
1311                 goto errout_tb;
1312         }
1313
1314         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
1315         if (!fnew) {
1316                 err = -ENOBUFS;
1317                 goto errout_tb;
1318         }
1319
1320         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
1321         if (err < 0)
1322                 goto errout;
1323
1324         if (!handle) {
1325                 handle = 1;
1326                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1327                                     INT_MAX, GFP_KERNEL);
1328         } else if (!fold) {
1329                 /* user specifies a handle and it doesn't exist */
1330                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1331                                     handle, GFP_KERNEL);
1332         }
1333         if (err)
1334                 goto errout;
1335         fnew->handle = handle;
1336
1337         if (tb[TCA_FLOWER_FLAGS]) {
1338                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
1339
1340                 if (!tc_flags_valid(fnew->flags)) {
1341                         err = -EINVAL;
1342                         goto errout_idr;
1343                 }
1344         }
1345
1346         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr,
1347                            tp->chain->tmplt_priv, extack);
1348         if (err)
1349                 goto errout_idr;
1350
1351         err = fl_check_assign_mask(head, fnew, fold, &mask);
1352         if (err)
1353                 goto errout_idr;
1354
1355         if (!fold && __fl_lookup(fnew->mask, &fnew->mkey)) {
1356                 err = -EEXIST;
1357                 goto errout_mask;
1358         }
1359
1360         err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node,
1361                                      fnew->mask->filter_ht_params);
1362         if (err)
1363                 goto errout_mask;
1364
1365         if (!tc_skip_hw(fnew->flags)) {
1366                 err = fl_hw_replace_filter(tp, fnew, extack);
1367                 if (err)
1368                         goto errout_mask;
1369         }
1370
1371         if (!tc_in_hw(fnew->flags))
1372                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1373
1374         if (fold) {
1375                 rhashtable_remove_fast(&fold->mask->ht,
1376                                        &fold->ht_node,
1377                                        fold->mask->filter_ht_params);
1378                 if (!tc_skip_hw(fold->flags))
1379                         fl_hw_destroy_filter(tp, fold, NULL);
1380         }
1381
1382         *arg = fnew;
1383
1384         if (fold) {
1385                 idr_replace(&head->handle_idr, fnew, fnew->handle);
1386                 list_replace_rcu(&fold->list, &fnew->list);
1387                 tcf_unbind_filter(tp, &fold->res);
1388                 tcf_exts_get_net(&fold->exts);
1389                 tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
1390         } else {
1391                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1392         }
1393
1394         kfree(tb);
1395         return 0;
1396
1397 errout_mask:
1398         fl_mask_put(head, fnew->mask, false);
1399
1400 errout_idr:
1401         if (!fold)
1402                 idr_remove(&head->handle_idr, fnew->handle);
1403 errout:
1404         tcf_exts_destroy(&fnew->exts);
1405         kfree(fnew);
1406 errout_tb:
1407         kfree(tb);
1408         return err;
1409 }
1410
1411 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1412                      struct netlink_ext_ack *extack)
1413 {
1414         struct cls_fl_head *head = rtnl_dereference(tp->root);
1415         struct cls_fl_filter *f = arg;
1416
1417         rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
1418                                f->mask->filter_ht_params);
1419         __fl_delete(tp, f, extack);
1420         *last = list_empty(&head->masks);
1421         return 0;
1422 }
1423
1424 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1425 {
1426         struct cls_fl_head *head = rtnl_dereference(tp->root);
1427         struct cls_fl_filter *f;
1428
1429         arg->count = arg->skip;
1430
1431         while ((f = idr_get_next_ul(&head->handle_idr,
1432                                     &arg->cookie)) != NULL) {
1433                 if (arg->fn(tp, f, arg) < 0) {
1434                         arg->stop = 1;
1435                         break;
1436                 }
1437                 arg->cookie = f->handle + 1;
1438                 arg->count++;
1439         }
1440 }
1441
1442 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
1443                         void *cb_priv, struct netlink_ext_ack *extack)
1444 {
1445         struct cls_fl_head *head = rtnl_dereference(tp->root);
1446         struct tc_cls_flower_offload cls_flower = {};
1447         struct tcf_block *block = tp->chain->block;
1448         struct fl_flow_mask *mask;
1449         struct cls_fl_filter *f;
1450         int err;
1451
1452         list_for_each_entry(mask, &head->masks, list) {
1453                 list_for_each_entry(f, &mask->filters, list) {
1454                         if (tc_skip_hw(f->flags))
1455                                 continue;
1456
1457                         tc_cls_common_offload_init(&cls_flower.common, tp,
1458                                                    f->flags, extack);
1459                         cls_flower.command = add ?
1460                                 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY;
1461                         cls_flower.cookie = (unsigned long)f;
1462                         cls_flower.dissector = &mask->dissector;
1463                         cls_flower.mask = &mask->key;
1464                         cls_flower.key = &f->mkey;
1465                         cls_flower.exts = &f->exts;
1466                         cls_flower.classid = f->res.classid;
1467
1468                         err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);
1469                         if (err) {
1470                                 if (add && tc_skip_sw(f->flags))
1471                                         return err;
1472                                 continue;
1473                         }
1474
1475                         tc_cls_offload_cnt_update(block, &f->in_hw_count,
1476                                                   &f->flags, add);
1477                 }
1478         }
1479
1480         return 0;
1481 }
1482
1483 static void fl_hw_create_tmplt(struct tcf_chain *chain,
1484                                struct fl_flow_tmplt *tmplt)
1485 {
1486         struct tc_cls_flower_offload cls_flower = {};
1487         struct tcf_block *block = chain->block;
1488         struct tcf_exts dummy_exts = { 0, };
1489
1490         cls_flower.common.chain_index = chain->index;
1491         cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE;
1492         cls_flower.cookie = (unsigned long) tmplt;
1493         cls_flower.dissector = &tmplt->dissector;
1494         cls_flower.mask = &tmplt->mask;
1495         cls_flower.key = &tmplt->dummy_key;
1496         cls_flower.exts = &dummy_exts;
1497
1498         /* We don't care if driver (any of them) fails to handle this
1499          * call. It serves just as a hint for it.
1500          */
1501         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
1502 }
1503
1504 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
1505                                 struct fl_flow_tmplt *tmplt)
1506 {
1507         struct tc_cls_flower_offload cls_flower = {};
1508         struct tcf_block *block = chain->block;
1509
1510         cls_flower.common.chain_index = chain->index;
1511         cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY;
1512         cls_flower.cookie = (unsigned long) tmplt;
1513
1514         tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, false);
1515 }
1516
1517 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
1518                              struct nlattr **tca,
1519                              struct netlink_ext_ack *extack)
1520 {
1521         struct fl_flow_tmplt *tmplt;
1522         struct nlattr **tb;
1523         int err;
1524
1525         if (!tca[TCA_OPTIONS])
1526                 return ERR_PTR(-EINVAL);
1527
1528         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1529         if (!tb)
1530                 return ERR_PTR(-ENOBUFS);
1531         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
1532                                fl_policy, NULL);
1533         if (err)
1534                 goto errout_tb;
1535
1536         tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
1537         if (!tmplt) {
1538                 err = -ENOMEM;
1539                 goto errout_tb;
1540         }
1541         tmplt->chain = chain;
1542         err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
1543         if (err)
1544                 goto errout_tmplt;
1545         kfree(tb);
1546
1547         fl_init_dissector(&tmplt->dissector, &tmplt->mask);
1548
1549         fl_hw_create_tmplt(chain, tmplt);
1550
1551         return tmplt;
1552
1553 errout_tmplt:
1554         kfree(tmplt);
1555 errout_tb:
1556         kfree(tb);
1557         return ERR_PTR(err);
1558 }
1559
1560 static void fl_tmplt_destroy(void *tmplt_priv)
1561 {
1562         struct fl_flow_tmplt *tmplt = tmplt_priv;
1563
1564         fl_hw_destroy_tmplt(tmplt->chain, tmplt);
1565         kfree(tmplt);
1566 }
1567
1568 static int fl_dump_key_val(struct sk_buff *skb,
1569                            void *val, int val_type,
1570                            void *mask, int mask_type, int len)
1571 {
1572         int err;
1573
1574         if (!memchr_inv(mask, 0, len))
1575                 return 0;
1576         err = nla_put(skb, val_type, len, val);
1577         if (err)
1578                 return err;
1579         if (mask_type != TCA_FLOWER_UNSPEC) {
1580                 err = nla_put(skb, mask_type, len, mask);
1581                 if (err)
1582                         return err;
1583         }
1584         return 0;
1585 }
1586
1587 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
1588                                   struct fl_flow_key *mask)
1589 {
1590         if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN,
1591                             &mask->tp_min.dst, TCA_FLOWER_UNSPEC,
1592                             sizeof(key->tp_min.dst)) ||
1593             fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX,
1594                             &mask->tp_max.dst, TCA_FLOWER_UNSPEC,
1595                             sizeof(key->tp_max.dst)) ||
1596             fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN,
1597                             &mask->tp_min.src, TCA_FLOWER_UNSPEC,
1598                             sizeof(key->tp_min.src)) ||
1599             fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX,
1600                             &mask->tp_max.src, TCA_FLOWER_UNSPEC,
1601                             sizeof(key->tp_max.src)))
1602                 return -1;
1603
1604         return 0;
1605 }
1606
1607 static int fl_dump_key_mpls(struct sk_buff *skb,
1608                             struct flow_dissector_key_mpls *mpls_key,
1609                             struct flow_dissector_key_mpls *mpls_mask)
1610 {
1611         int err;
1612
1613         if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1614                 return 0;
1615         if (mpls_mask->mpls_ttl) {
1616                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1617                                  mpls_key->mpls_ttl);
1618                 if (err)
1619                         return err;
1620         }
1621         if (mpls_mask->mpls_tc) {
1622                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1623                                  mpls_key->mpls_tc);
1624                 if (err)
1625                         return err;
1626         }
1627         if (mpls_mask->mpls_label) {
1628                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1629                                   mpls_key->mpls_label);
1630                 if (err)
1631                         return err;
1632         }
1633         if (mpls_mask->mpls_bos) {
1634                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1635                                  mpls_key->mpls_bos);
1636                 if (err)
1637                         return err;
1638         }
1639         return 0;
1640 }
1641
1642 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
1643                           struct flow_dissector_key_ip *key,
1644                           struct flow_dissector_key_ip *mask)
1645 {
1646         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1647         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1648         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1649         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1650
1651         if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
1652             fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
1653                 return -1;
1654
1655         return 0;
1656 }
1657
1658 static int fl_dump_key_vlan(struct sk_buff *skb,
1659                             int vlan_id_key, int vlan_prio_key,
1660                             struct flow_dissector_key_vlan *vlan_key,
1661                             struct flow_dissector_key_vlan *vlan_mask)
1662 {
1663         int err;
1664
1665         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1666                 return 0;
1667         if (vlan_mask->vlan_id) {
1668                 err = nla_put_u16(skb, vlan_id_key,
1669                                   vlan_key->vlan_id);
1670                 if (err)
1671                         return err;
1672         }
1673         if (vlan_mask->vlan_priority) {
1674                 err = nla_put_u8(skb, vlan_prio_key,
1675                                  vlan_key->vlan_priority);
1676                 if (err)
1677                         return err;
1678         }
1679         return 0;
1680 }
1681
1682 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1683                             u32 *flower_key, u32 *flower_mask,
1684                             u32 flower_flag_bit, u32 dissector_flag_bit)
1685 {
1686         if (dissector_mask & dissector_flag_bit) {
1687                 *flower_mask |= flower_flag_bit;
1688                 if (dissector_key & dissector_flag_bit)
1689                         *flower_key |= flower_flag_bit;
1690         }
1691 }
1692
1693 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1694 {
1695         u32 key, mask;
1696         __be32 _key, _mask;
1697         int err;
1698
1699         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1700                 return 0;
1701
1702         key = 0;
1703         mask = 0;
1704
1705         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1706                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1707         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1708                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1709                         FLOW_DIS_FIRST_FRAG);
1710
1711         _key = cpu_to_be32(key);
1712         _mask = cpu_to_be32(mask);
1713
1714         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1715         if (err)
1716                 return err;
1717
1718         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1719 }
1720
1721 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
1722                                   struct flow_dissector_key_enc_opts *enc_opts)
1723 {
1724         struct geneve_opt *opt;
1725         struct nlattr *nest;
1726         int opt_off = 0;
1727
1728         nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
1729         if (!nest)
1730                 goto nla_put_failure;
1731
1732         while (enc_opts->len > opt_off) {
1733                 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
1734
1735                 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
1736                                  opt->opt_class))
1737                         goto nla_put_failure;
1738                 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
1739                                opt->type))
1740                         goto nla_put_failure;
1741                 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
1742                             opt->length * 4, opt->opt_data))
1743                         goto nla_put_failure;
1744
1745                 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
1746         }
1747         nla_nest_end(skb, nest);
1748         return 0;
1749
1750 nla_put_failure:
1751         nla_nest_cancel(skb, nest);
1752         return -EMSGSIZE;
1753 }
1754
1755 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
1756                                struct flow_dissector_key_enc_opts *enc_opts)
1757 {
1758         struct nlattr *nest;
1759         int err;
1760
1761         if (!enc_opts->len)
1762                 return 0;
1763
1764         nest = nla_nest_start(skb, enc_opt_type);
1765         if (!nest)
1766                 goto nla_put_failure;
1767
1768         switch (enc_opts->dst_opt_type) {
1769         case TUNNEL_GENEVE_OPT:
1770                 err = fl_dump_key_geneve_opt(skb, enc_opts);
1771                 if (err)
1772                         goto nla_put_failure;
1773                 break;
1774         default:
1775                 goto nla_put_failure;
1776         }
1777         nla_nest_end(skb, nest);
1778         return 0;
1779
1780 nla_put_failure:
1781         nla_nest_cancel(skb, nest);
1782         return -EMSGSIZE;
1783 }
1784
1785 static int fl_dump_key_enc_opt(struct sk_buff *skb,
1786                                struct flow_dissector_key_enc_opts *key_opts,
1787                                struct flow_dissector_key_enc_opts *msk_opts)
1788 {
1789         int err;
1790
1791         err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
1792         if (err)
1793                 return err;
1794
1795         return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
1796 }
1797
1798 static int fl_dump_key(struct sk_buff *skb, struct net *net,
1799                        struct fl_flow_key *key, struct fl_flow_key *mask)
1800 {
1801         if (mask->indev_ifindex) {
1802                 struct net_device *dev;
1803
1804                 dev = __dev_get_by_index(net, key->indev_ifindex);
1805                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1806                         goto nla_put_failure;
1807         }
1808
1809         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1810                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1811                             sizeof(key->eth.dst)) ||
1812             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1813                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1814                             sizeof(key->eth.src)) ||
1815             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1816                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1817                             sizeof(key->basic.n_proto)))
1818                 goto nla_put_failure;
1819
1820         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1821                 goto nla_put_failure;
1822
1823         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
1824                              TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
1825                 goto nla_put_failure;
1826
1827         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
1828                              TCA_FLOWER_KEY_CVLAN_PRIO,
1829                              &key->cvlan, &mask->cvlan) ||
1830             (mask->cvlan.vlan_tpid &&
1831              nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1832                           key->cvlan.vlan_tpid)))
1833                 goto nla_put_failure;
1834
1835         if (mask->basic.n_proto) {
1836                 if (mask->cvlan.vlan_tpid) {
1837                         if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1838                                          key->basic.n_proto))
1839                                 goto nla_put_failure;
1840                 } else if (mask->vlan.vlan_tpid) {
1841                         if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1842                                          key->basic.n_proto))
1843                                 goto nla_put_failure;
1844                 }
1845         }
1846
1847         if ((key->basic.n_proto == htons(ETH_P_IP) ||
1848              key->basic.n_proto == htons(ETH_P_IPV6)) &&
1849             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1850                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1851                             sizeof(key->basic.ip_proto)) ||
1852             fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
1853                 goto nla_put_failure;
1854
1855         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1856             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1857                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1858                              sizeof(key->ipv4.src)) ||
1859              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1860                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1861                              sizeof(key->ipv4.dst))))
1862                 goto nla_put_failure;
1863         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1864                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1865                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1866                                   sizeof(key->ipv6.src)) ||
1867                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1868                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1869                                   sizeof(key->ipv6.dst))))
1870                 goto nla_put_failure;
1871
1872         if (key->basic.ip_proto == IPPROTO_TCP &&
1873             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1874                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1875                              sizeof(key->tp.src)) ||
1876              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1877                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1878                              sizeof(key->tp.dst)) ||
1879              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1880                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1881                              sizeof(key->tcp.flags))))
1882                 goto nla_put_failure;
1883         else if (key->basic.ip_proto == IPPROTO_UDP &&
1884                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1885                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1886                                   sizeof(key->tp.src)) ||
1887                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1888                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1889                                   sizeof(key->tp.dst))))
1890                 goto nla_put_failure;
1891         else if (key->basic.ip_proto == IPPROTO_SCTP &&
1892                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1893                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1894                                   sizeof(key->tp.src)) ||
1895                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1896                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1897                                   sizeof(key->tp.dst))))
1898                 goto nla_put_failure;
1899         else if (key->basic.n_proto == htons(ETH_P_IP) &&
1900                  key->basic.ip_proto == IPPROTO_ICMP &&
1901                  (fl_dump_key_val(skb, &key->icmp.type,
1902                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1903                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1904                                   sizeof(key->icmp.type)) ||
1905                   fl_dump_key_val(skb, &key->icmp.code,
1906                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1907                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1908                                   sizeof(key->icmp.code))))
1909                 goto nla_put_failure;
1910         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1911                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
1912                  (fl_dump_key_val(skb, &key->icmp.type,
1913                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1914                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1915                                   sizeof(key->icmp.type)) ||
1916                   fl_dump_key_val(skb, &key->icmp.code,
1917                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1918                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1919                                   sizeof(key->icmp.code))))
1920                 goto nla_put_failure;
1921         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1922                   key->basic.n_proto == htons(ETH_P_RARP)) &&
1923                  (fl_dump_key_val(skb, &key->arp.sip,
1924                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1925                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
1926                                   sizeof(key->arp.sip)) ||
1927                   fl_dump_key_val(skb, &key->arp.tip,
1928                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1929                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
1930                                   sizeof(key->arp.tip)) ||
1931                   fl_dump_key_val(skb, &key->arp.op,
1932                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1933                                   TCA_FLOWER_KEY_ARP_OP_MASK,
1934                                   sizeof(key->arp.op)) ||
1935                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1936                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1937                                   sizeof(key->arp.sha)) ||
1938                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1939                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1940                                   sizeof(key->arp.tha))))
1941                 goto nla_put_failure;
1942
1943         if ((key->basic.ip_proto == IPPROTO_TCP ||
1944              key->basic.ip_proto == IPPROTO_UDP ||
1945              key->basic.ip_proto == IPPROTO_SCTP) &&
1946              fl_dump_key_port_range(skb, key, mask))
1947                 goto nla_put_failure;
1948
1949         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1950             (fl_dump_key_val(skb, &key->enc_ipv4.src,
1951                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1952                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1953                             sizeof(key->enc_ipv4.src)) ||
1954              fl_dump_key_val(skb, &key->enc_ipv4.dst,
1955                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1956                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1957                              sizeof(key->enc_ipv4.dst))))
1958                 goto nla_put_failure;
1959         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1960                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
1961                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1962                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1963                             sizeof(key->enc_ipv6.src)) ||
1964                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
1965                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
1966                                  &mask->enc_ipv6.dst,
1967                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1968                             sizeof(key->enc_ipv6.dst))))
1969                 goto nla_put_failure;
1970
1971         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1972                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1973                             sizeof(key->enc_key_id)) ||
1974             fl_dump_key_val(skb, &key->enc_tp.src,
1975                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1976                             &mask->enc_tp.src,
1977                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1978                             sizeof(key->enc_tp.src)) ||
1979             fl_dump_key_val(skb, &key->enc_tp.dst,
1980                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1981                             &mask->enc_tp.dst,
1982                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1983                             sizeof(key->enc_tp.dst)) ||
1984             fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
1985             fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
1986                 goto nla_put_failure;
1987
1988         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1989                 goto nla_put_failure;
1990
1991         return 0;
1992
1993 nla_put_failure:
1994         return -EMSGSIZE;
1995 }
1996
1997 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
1998                    struct sk_buff *skb, struct tcmsg *t)
1999 {
2000         struct cls_fl_filter *f = fh;
2001         struct nlattr *nest;
2002         struct fl_flow_key *key, *mask;
2003
2004         if (!f)
2005                 return skb->len;
2006
2007         t->tcm_handle = f->handle;
2008
2009         nest = nla_nest_start(skb, TCA_OPTIONS);
2010         if (!nest)
2011                 goto nla_put_failure;
2012
2013         if (f->res.classid &&
2014             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
2015                 goto nla_put_failure;
2016
2017         key = &f->key;
2018         mask = &f->mask->key;
2019
2020         if (fl_dump_key(skb, net, key, mask))
2021                 goto nla_put_failure;
2022
2023         if (!tc_skip_hw(f->flags))
2024                 fl_hw_update_stats(tp, f);
2025
2026         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
2027                 goto nla_put_failure;
2028
2029         if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
2030                 goto nla_put_failure;
2031
2032         if (tcf_exts_dump(skb, &f->exts))
2033                 goto nla_put_failure;
2034
2035         nla_nest_end(skb, nest);
2036
2037         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
2038                 goto nla_put_failure;
2039
2040         return skb->len;
2041
2042 nla_put_failure:
2043         nla_nest_cancel(skb, nest);
2044         return -1;
2045 }
2046
2047 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
2048 {
2049         struct fl_flow_tmplt *tmplt = tmplt_priv;
2050         struct fl_flow_key *key, *mask;
2051         struct nlattr *nest;
2052
2053         nest = nla_nest_start(skb, TCA_OPTIONS);
2054         if (!nest)
2055                 goto nla_put_failure;
2056
2057         key = &tmplt->dummy_key;
2058         mask = &tmplt->mask;
2059
2060         if (fl_dump_key(skb, net, key, mask))
2061                 goto nla_put_failure;
2062
2063         nla_nest_end(skb, nest);
2064
2065         return skb->len;
2066
2067 nla_put_failure:
2068         nla_nest_cancel(skb, nest);
2069         return -EMSGSIZE;
2070 }
2071
2072 static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
2073 {
2074         struct cls_fl_filter *f = fh;
2075
2076         if (f && f->res.classid == classid)
2077                 f->res.class = cl;
2078 }
2079
2080 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
2081         .kind           = "flower",
2082         .classify       = fl_classify,
2083         .init           = fl_init,
2084         .destroy        = fl_destroy,
2085         .get            = fl_get,
2086         .change         = fl_change,
2087         .delete         = fl_delete,
2088         .walk           = fl_walk,
2089         .reoffload      = fl_reoffload,
2090         .dump           = fl_dump,
2091         .bind_class     = fl_bind_class,
2092         .tmplt_create   = fl_tmplt_create,
2093         .tmplt_destroy  = fl_tmplt_destroy,
2094         .tmplt_dump     = fl_tmplt_dump,
2095         .owner          = THIS_MODULE,
2096 };
2097
2098 static int __init cls_fl_init(void)
2099 {
2100         return register_tcf_proto_ops(&cls_fl_ops);
2101 }
2102
2103 static void __exit cls_fl_exit(void)
2104 {
2105         unregister_tcf_proto_ops(&cls_fl_ops);
2106 }
2107
2108 module_init(cls_fl_init);
2109 module_exit(cls_fl_exit);
2110
2111 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2112 MODULE_DESCRIPTION("Flower classifier");
2113 MODULE_LICENSE("GPL v2");