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, &f->exts, TC_SETUP_CLSFLOWER,
 372                          &cls_flower, false);
 373         tcf_block_offload_dec(block, &f->flags);
 374 }
 375
 376 static int fl_hw_replace_filter(struct tcf_proto *tp,
 377                                 struct cls_fl_filter *f,
 378                                 struct netlink_ext_ack *extack)
 379 {
 380         struct tc_cls_flower_offload cls_flower = {};
 381         struct tcf_block *block = tp->chain->block;
 382         bool skip_sw = tc_skip_sw(f->flags);
 383         int err;
 384
 385         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, extack);
 386         cls_flower.command = TC_CLSFLOWER_REPLACE;
 387         cls_flower.cookie = (unsigned long) f;
 388         cls_flower.dissector = &f->mask->dissector;
 389         cls_flower.mask = &f->mask->key;
 390         cls_flower.key = &f->mkey;
 391         cls_flower.exts = &f->exts;
 392         cls_flower.classid = f->res.classid;
 393
 394         err = tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 395                                &cls_flower, skip_sw);
 396         if (err < 0) {
 397                 fl_hw_destroy_filter(tp, f, NULL);
 398                 return err;
 399         } else if (err > 0) {
 400                 f->in_hw_count = err;
 401                 tcf_block_offload_inc(block, &f->flags);
 402         }
 403
 404         if (skip_sw && !(f->flags & TCA_CLS_FLAGS_IN_HW))
 405                 return -EINVAL;
 406
 407         return 0;
 408 }
 409
 410 static void fl_hw_update_stats(struct tcf_proto *tp, struct cls_fl_filter *f)
 411 {
 412         struct tc_cls_flower_offload cls_flower = {};
 413         struct tcf_block *block = tp->chain->block;
 414
 415         tc_cls_common_offload_init(&cls_flower.common, tp, f->flags, NULL);
 416         cls_flower.command = TC_CLSFLOWER_STATS;
 417         cls_flower.cookie = (unsigned long) f;
 418         cls_flower.exts = &f->exts;
 419         cls_flower.classid = f->res.classid;
 420
 421         tc_setup_cb_call(block, &f->exts, TC_SETUP_CLSFLOWER,
 422                          &cls_flower, false);
 423 }
 424
 425 static bool __fl_delete(struct tcf_proto *tp, struct cls_fl_filter *f,
 426                         struct netlink_ext_ack *extack)
 427 {
 428         struct cls_fl_head *head = rtnl_dereference(tp->root);
 429         bool async = tcf_exts_get_net(&f->exts);
 430         bool last;
 431
 432         idr_remove(&head->handle_idr, f->handle);
 433         list_del_rcu(&f->list);
 434         last = fl_mask_put(head, f->mask, async);
 435         if (!tc_skip_hw(f->flags))
 436                 fl_hw_destroy_filter(tp, f, extack);
 437         tcf_unbind_filter(tp, &f->res);
 438         if (async)
 439                 tcf_queue_work(&f->rwork, fl_destroy_filter_work);
 440         else
 441                 __fl_destroy_filter(f);
 442
 443         return last;
 444 }
 445
 446 static void fl_destroy_sleepable(struct work_struct *work)
 447 {
 448         struct cls_fl_head *head = container_of(to_rcu_work(work),
 449                                                 struct cls_fl_head,
 450                                                 rwork);
 451
 452         rhashtable_destroy(&head->ht);
 453         kfree(head);
 454         module_put(THIS_MODULE);
 455 }
 456
 457 static void fl_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
 458 {
 459         struct cls_fl_head *head = rtnl_dereference(tp->root);
 460         struct fl_flow_mask *mask, *next_mask;
 461         struct cls_fl_filter *f, *next;
 462
 463         list_for_each_entry_safe(mask, next_mask, &head->masks, list) {
 464                 list_for_each_entry_safe(f, next, &mask->filters, list) {
 465                         if (__fl_delete(tp, f, extack))
 466                                 break;
 467                 }
 468         }
 469         idr_destroy(&head->handle_idr);
 470
 471         __module_get(THIS_MODULE);
 472         tcf_queue_work(&head->rwork, fl_destroy_sleepable);
 473 }
 474
 475 static void *fl_get(struct tcf_proto *tp, u32 handle)
 476 {
 477         struct cls_fl_head *head = rtnl_dereference(tp->root);
 478
 479         return idr_find(&head->handle_idr, handle);
 480 }
 481
 482 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 483         [TCA_FLOWER_UNSPEC]             = { .type = NLA_UNSPEC },
 484         [TCA_FLOWER_CLASSID]            = { .type = NLA_U32 },
 485         [TCA_FLOWER_INDEV]              = { .type = NLA_STRING,
 486                                             .len = IFNAMSIZ },
 487         [TCA_FLOWER_KEY_ETH_DST]        = { .len = ETH_ALEN },
 488         [TCA_FLOWER_KEY_ETH_DST_MASK]   = { .len = ETH_ALEN },
 489         [TCA_FLOWER_KEY_ETH_SRC]        = { .len = ETH_ALEN },
 490         [TCA_FLOWER_KEY_ETH_SRC_MASK]   = { .len = ETH_ALEN },
 491         [TCA_FLOWER_KEY_ETH_TYPE]       = { .type = NLA_U16 },
 492         [TCA_FLOWER_KEY_IP_PROTO]       = { .type = NLA_U8 },
 493         [TCA_FLOWER_KEY_IPV4_SRC]       = { .type = NLA_U32 },
 494         [TCA_FLOWER_KEY_IPV4_SRC_MASK]  = { .type = NLA_U32 },
 495         [TCA_FLOWER_KEY_IPV4_DST]       = { .type = NLA_U32 },
 496         [TCA_FLOWER_KEY_IPV4_DST_MASK]  = { .type = NLA_U32 },
 497         [TCA_FLOWER_KEY_IPV6_SRC]       = { .len = sizeof(struct in6_addr) },
 498         [TCA_FLOWER_KEY_IPV6_SRC_MASK]  = { .len = sizeof(struct in6_addr) },
 499         [TCA_FLOWER_KEY_IPV6_DST]       = { .len = sizeof(struct in6_addr) },
 500         [TCA_FLOWER_KEY_IPV6_DST_MASK]  = { .len = sizeof(struct in6_addr) },
 501         [TCA_FLOWER_KEY_TCP_SRC]        = { .type = NLA_U16 },
 502         [TCA_FLOWER_KEY_TCP_DST]        = { .type = NLA_U16 },
 503         [TCA_FLOWER_KEY_UDP_SRC]        = { .type = NLA_U16 },
 504         [TCA_FLOWER_KEY_UDP_DST]        = { .type = NLA_U16 },
 505         [TCA_FLOWER_KEY_VLAN_ID]        = { .type = NLA_U16 },
 506         [TCA_FLOWER_KEY_VLAN_PRIO]      = { .type = NLA_U8 },
 507         [TCA_FLOWER_KEY_VLAN_ETH_TYPE]  = { .type = NLA_U16 },
 508         [TCA_FLOWER_KEY_ENC_KEY_ID]     = { .type = NLA_U32 },
 509         [TCA_FLOWER_KEY_ENC_IPV4_SRC]   = { .type = NLA_U32 },
 510         [TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK] = { .type = NLA_U32 },
 511         [TCA_FLOWER_KEY_ENC_IPV4_DST]   = { .type = NLA_U32 },
 512         [TCA_FLOWER_KEY_ENC_IPV4_DST_MASK] = { .type = NLA_U32 },
 513         [TCA_FLOWER_KEY_ENC_IPV6_SRC]   = { .len = sizeof(struct in6_addr) },
 514         [TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
 515         [TCA_FLOWER_KEY_ENC_IPV6_DST]   = { .len = sizeof(struct in6_addr) },
 516         [TCA_FLOWER_KEY_ENC_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
 517         [TCA_FLOWER_KEY_TCP_SRC_MASK]   = { .type = NLA_U16 },
 518         [TCA_FLOWER_KEY_TCP_DST_MASK]   = { .type = NLA_U16 },
 519         [TCA_FLOWER_KEY_UDP_SRC_MASK]   = { .type = NLA_U16 },
 520         [TCA_FLOWER_KEY_UDP_DST_MASK]   = { .type = NLA_U16 },
 521         [TCA_FLOWER_KEY_SCTP_SRC_MASK]  = { .type = NLA_U16 },
 522         [TCA_FLOWER_KEY_SCTP_DST_MASK]  = { .type = NLA_U16 },
 523         [TCA_FLOWER_KEY_SCTP_SRC]       = { .type = NLA_U16 },
 524         [TCA_FLOWER_KEY_SCTP_DST]       = { .type = NLA_U16 },
 525         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT]       = { .type = NLA_U16 },
 526         [TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK]  = { .type = NLA_U16 },
 527         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT]       = { .type = NLA_U16 },
 528         [TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK]  = { .type = NLA_U16 },
 529         [TCA_FLOWER_KEY_FLAGS]          = { .type = NLA_U32 },
 530         [TCA_FLOWER_KEY_FLAGS_MASK]     = { .type = NLA_U32 },
 531         [TCA_FLOWER_KEY_ICMPV4_TYPE]    = { .type = NLA_U8 },
 532         [TCA_FLOWER_KEY_ICMPV4_TYPE_MASK] = { .type = NLA_U8 },
 533         [TCA_FLOWER_KEY_ICMPV4_CODE]    = { .type = NLA_U8 },
 534         [TCA_FLOWER_KEY_ICMPV4_CODE_MASK] = { .type = NLA_U8 },
 535         [TCA_FLOWER_KEY_ICMPV6_TYPE]    = { .type = NLA_U8 },
 536         [TCA_FLOWER_KEY_ICMPV6_TYPE_MASK] = { .type = NLA_U8 },
 537         [TCA_FLOWER_KEY_ICMPV6_CODE]    = { .type = NLA_U8 },
 538         [TCA_FLOWER_KEY_ICMPV6_CODE_MASK] = { .type = NLA_U8 },
 539         [TCA_FLOWER_KEY_ARP_SIP]        = { .type = NLA_U32 },
 540         [TCA_FLOWER_KEY_ARP_SIP_MASK]   = { .type = NLA_U32 },
 541         [TCA_FLOWER_KEY_ARP_TIP]        = { .type = NLA_U32 },
 542         [TCA_FLOWER_KEY_ARP_TIP_MASK]   = { .type = NLA_U32 },
 543         [TCA_FLOWER_KEY_ARP_OP]         = { .type = NLA_U8 },
 544         [TCA_FLOWER_KEY_ARP_OP_MASK]    = { .type = NLA_U8 },
 545         [TCA_FLOWER_KEY_ARP_SHA]        = { .len = ETH_ALEN },
 546         [TCA_FLOWER_KEY_ARP_SHA_MASK]   = { .len = ETH_ALEN },
 547         [TCA_FLOWER_KEY_ARP_THA]        = { .len = ETH_ALEN },
 548         [TCA_FLOWER_KEY_ARP_THA_MASK]   = { .len = ETH_ALEN },
 549         [TCA_FLOWER_KEY_MPLS_TTL]       = { .type = NLA_U8 },
 550         [TCA_FLOWER_KEY_MPLS_BOS]       = { .type = NLA_U8 },
 551         [TCA_FLOWER_KEY_MPLS_TC]        = { .type = NLA_U8 },
 552         [TCA_FLOWER_KEY_MPLS_LABEL]     = { .type = NLA_U32 },
 553         [TCA_FLOWER_KEY_TCP_FLAGS]      = { .type = NLA_U16 },
 554         [TCA_FLOWER_KEY_TCP_FLAGS_MASK] = { .type = NLA_U16 },
 555         [TCA_FLOWER_KEY_IP_TOS]         = { .type = NLA_U8 },
 556         [TCA_FLOWER_KEY_IP_TOS_MASK]    = { .type = NLA_U8 },
 557         [TCA_FLOWER_KEY_IP_TTL]         = { .type = NLA_U8 },
 558         [TCA_FLOWER_KEY_IP_TTL_MASK]    = { .type = NLA_U8 },
 559         [TCA_FLOWER_KEY_CVLAN_ID]       = { .type = NLA_U16 },
 560         [TCA_FLOWER_KEY_CVLAN_PRIO]     = { .type = NLA_U8 },
 561         [TCA_FLOWER_KEY_CVLAN_ETH_TYPE] = { .type = NLA_U16 },
 562         [TCA_FLOWER_KEY_ENC_IP_TOS]     = { .type = NLA_U8 },
 563         [TCA_FLOWER_KEY_ENC_IP_TOS_MASK] = { .type = NLA_U8 },
 564         [TCA_FLOWER_KEY_ENC_IP_TTL]      = { .type = NLA_U8 },
 565         [TCA_FLOWER_KEY_ENC_IP_TTL_MASK] = { .type = NLA_U8 },
 566         [TCA_FLOWER_KEY_ENC_OPTS]       = { .type = NLA_NESTED },
 567         [TCA_FLOWER_KEY_ENC_OPTS_MASK]  = { .type = NLA_NESTED },
 568 };
 569
 570 static const struct nla_policy
 571 enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
 572         [TCA_FLOWER_KEY_ENC_OPTS_GENEVE]        = { .type = NLA_NESTED },
 573 };
 574
 575 static const struct nla_policy
 576 geneve_opt_policy[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1] = {
 577         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]      = { .type = NLA_U16 },
 578         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]       = { .type = NLA_U8 },
 579         [TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]       = { .type = NLA_BINARY,
 580                                                        .len = 128 },
 581 };
 582
 583 static void fl_set_key_val(struct nlattr **tb,
 584                            void *val, int val_type,
 585                            void *mask, int mask_type, int len)
 586 {
 587         if (!tb[val_type])
 588                 return;
 589         memcpy(val, nla_data(tb[val_type]), len);
 590         if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
 591                 memset(mask, 0xff, len);
 592         else
 593                 memcpy(mask, nla_data(tb[mask_type]), len);
 594 }
 595
 596 static int fl_set_key_port_range(struct nlattr **tb, struct fl_flow_key *key,
 597                                  struct fl_flow_key *mask)
 598 {
 599         fl_set_key_val(tb, &key->tp_min.dst,
 600                        TCA_FLOWER_KEY_PORT_DST_MIN, &mask->tp_min.dst,
 601                        TCA_FLOWER_UNSPEC, sizeof(key->tp_min.dst));
 602         fl_set_key_val(tb, &key->tp_max.dst,
 603                        TCA_FLOWER_KEY_PORT_DST_MAX, &mask->tp_max.dst,
 604                        TCA_FLOWER_UNSPEC, sizeof(key->tp_max.dst));
 605         fl_set_key_val(tb, &key->tp_min.src,
 606                        TCA_FLOWER_KEY_PORT_SRC_MIN, &mask->tp_min.src,
 607                        TCA_FLOWER_UNSPEC, sizeof(key->tp_min.src));
 608         fl_set_key_val(tb, &key->tp_max.src,
 609                        TCA_FLOWER_KEY_PORT_SRC_MAX, &mask->tp_max.src,
 610                        TCA_FLOWER_UNSPEC, sizeof(key->tp_max.src));
 611
 612         if ((mask->tp_min.dst && mask->tp_max.dst &&
 613              htons(key->tp_max.dst) <= htons(key->tp_min.dst)) ||
 614              (mask->tp_min.src && mask->tp_max.src &&
 615               htons(key->tp_max.src) <= htons(key->tp_min.src)))
 616                 return -EINVAL;
 617
 618         return 0;
 619 }
 620
 621 static int fl_set_key_mpls(struct nlattr **tb,
 622                            struct flow_dissector_key_mpls *key_val,
 623                            struct flow_dissector_key_mpls *key_mask)
 624 {
 625         if (tb[TCA_FLOWER_KEY_MPLS_TTL]) {
 626                 key_val->mpls_ttl = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TTL]);
 627                 key_mask->mpls_ttl = MPLS_TTL_MASK;
 628         }
 629         if (tb[TCA_FLOWER_KEY_MPLS_BOS]) {
 630                 u8 bos = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_BOS]);
 631
 632                 if (bos & ~MPLS_BOS_MASK)
 633                         return -EINVAL;
 634                 key_val->mpls_bos = bos;
 635                 key_mask->mpls_bos = MPLS_BOS_MASK;
 636         }
 637         if (tb[TCA_FLOWER_KEY_MPLS_TC]) {
 638                 u8 tc = nla_get_u8(tb[TCA_FLOWER_KEY_MPLS_TC]);
 639
 640                 if (tc & ~MPLS_TC_MASK)
 641                         return -EINVAL;
 642                 key_val->mpls_tc = tc;
 643                 key_mask->mpls_tc = MPLS_TC_MASK;
 644         }
 645         if (tb[TCA_FLOWER_KEY_MPLS_LABEL]) {
 646                 u32 label = nla_get_u32(tb[TCA_FLOWER_KEY_MPLS_LABEL]);
 647
 648                 if (label & ~MPLS_LABEL_MASK)
 649                         return -EINVAL;
 650                 key_val->mpls_label = label;
 651                 key_mask->mpls_label = MPLS_LABEL_MASK;
 652         }
 653         return 0;
 654 }
 655
 656 static void fl_set_key_vlan(struct nlattr **tb,
 657                             __be16 ethertype,
 658                             int vlan_id_key, int vlan_prio_key,
 659                             struct flow_dissector_key_vlan *key_val,
 660                             struct flow_dissector_key_vlan *key_mask)
 661 {
 662 #define VLAN_PRIORITY_MASK      0x7
 663
 664         if (tb[vlan_id_key]) {
 665                 key_val->vlan_id =
 666                         nla_get_u16(tb[vlan_id_key]) & VLAN_VID_MASK;
 667                 key_mask->vlan_id = VLAN_VID_MASK;
 668         }
 669         if (tb[vlan_prio_key]) {
 670                 key_val->vlan_priority =
 671                         nla_get_u8(tb[vlan_prio_key]) &
 672                         VLAN_PRIORITY_MASK;
 673                 key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 674         }
 675         key_val->vlan_tpid = ethertype;
 676         key_mask->vlan_tpid = cpu_to_be16(~0);
 677 }
 678
 679 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
 680                             u32 *dissector_key, u32 *dissector_mask,
 681                             u32 flower_flag_bit, u32 dissector_flag_bit)
 682 {
 683         if (flower_mask & flower_flag_bit) {
 684                 *dissector_mask |= dissector_flag_bit;
 685                 if (flower_key & flower_flag_bit)
 686                         *dissector_key |= dissector_flag_bit;
 687         }
 688 }
 689
 690 static int fl_set_key_flags(struct nlattr **tb,
 691                             u32 *flags_key, u32 *flags_mask)
 692 {
 693         u32 key, mask;
 694
 695         /* mask is mandatory for flags */
 696         if (!tb[TCA_FLOWER_KEY_FLAGS_MASK])
 697                 return -EINVAL;
 698
 699         key = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS]));
 700         mask = be32_to_cpu(nla_get_u32(tb[TCA_FLOWER_KEY_FLAGS_MASK]));
 701
 702         *flags_key  = 0;
 703         *flags_mask = 0;
 704
 705         fl_set_key_flag(key, mask, flags_key, flags_mask,
 706                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
 707         fl_set_key_flag(key, mask, flags_key, flags_mask,
 708                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
 709                         FLOW_DIS_FIRST_FRAG);
 710
 711         return 0;
 712 }
 713
 714 static void fl_set_key_ip(struct nlattr **tb, bool encap,
 715                           struct flow_dissector_key_ip *key,
 716                           struct flow_dissector_key_ip *mask)
 717 {
 718         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
 719         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
 720         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
 721         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
 722
 723         fl_set_key_val(tb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos));
 724         fl_set_key_val(tb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl));
 725 }
 726
 727 static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key,
 728                              int depth, int option_len,
 729                              struct netlink_ext_ack *extack)
 730 {
 731         struct nlattr *tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX + 1];
 732         struct nlattr *class = NULL, *type = NULL, *data = NULL;
 733         struct geneve_opt *opt;
 734         int err, data_len = 0;
 735
 736         if (option_len > sizeof(struct geneve_opt))
 737                 data_len = option_len - sizeof(struct geneve_opt);
 738
 739         opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len];
 740         memset(opt, 0xff, option_len);
 741         opt->length = data_len / 4;
 742         opt->r1 = 0;
 743         opt->r2 = 0;
 744         opt->r3 = 0;
 745
 746         /* If no mask has been prodived we assume an exact match. */
 747         if (!depth)
 748                 return sizeof(struct geneve_opt) + data_len;
 749
 750         if (nla_type(nla) != TCA_FLOWER_KEY_ENC_OPTS_GENEVE) {
 751                 NL_SET_ERR_MSG(extack, "Non-geneve option type for mask");
 752                 return -EINVAL;
 753         }
 754
 755         err = nla_parse_nested(tb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX,
 756                                nla, geneve_opt_policy, extack);
 757         if (err < 0)
 758                 return err;
 759
 760         /* We are not allowed to omit any of CLASS, TYPE or DATA
 761          * fields from the key.
 762          */
 763         if (!option_len &&
 764             (!tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS] ||
 765              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE] ||
 766              !tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA])) {
 767                 NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
 768                 return -EINVAL;
 769         }
 770
 771         /* Omitting any of CLASS, TYPE or DATA fields is allowed
 772          * for the mask.
 773          */
 774         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA]) {
 775                 int new_len = key->enc_opts.len;
 776
 777                 data = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA];
 778                 data_len = nla_len(data);
 779                 if (data_len < 4) {
 780                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
 781                         return -ERANGE;
 782                 }
 783                 if (data_len % 4) {
 784                         NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
 785                         return -ERANGE;
 786                 }
 787
 788                 new_len += sizeof(struct geneve_opt) + data_len;
 789                 BUILD_BUG_ON(FLOW_DIS_TUN_OPTS_MAX != IP_TUNNEL_OPTS_MAX);
 790                 if (new_len > FLOW_DIS_TUN_OPTS_MAX) {
 791                         NL_SET_ERR_MSG(extack, "Tunnel options exceeds max size");
 792                         return -ERANGE;
 793                 }
 794                 opt->length = data_len / 4;
 795                 memcpy(opt->opt_data, nla_data(data), data_len);
 796         }
 797
 798         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS]) {
 799                 class = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS];
 800                 opt->opt_class = nla_get_be16(class);
 801         }
 802
 803         if (tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE]) {
 804                 type = tb[TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE];
 805                 opt->type = nla_get_u8(type);
 806         }
 807
 808         return sizeof(struct geneve_opt) + data_len;
 809 }
 810
 811 static int fl_set_enc_opt(struct nlattr **tb, struct fl_flow_key *key,
 812                           struct fl_flow_key *mask,
 813                           struct netlink_ext_ack *extack)
 814 {
 815         const struct nlattr *nla_enc_key, *nla_opt_key, *nla_opt_msk = NULL;
 816         int err, option_len, key_depth, msk_depth = 0;
 817
 818         err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS],
 819                                   TCA_FLOWER_KEY_ENC_OPTS_MAX,
 820                                   enc_opts_policy, extack);
 821         if (err)
 822                 return err;
 823
 824         nla_enc_key = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS]);
 825
 826         if (tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]) {
 827                 err = nla_validate_nested(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK],
 828                                           TCA_FLOWER_KEY_ENC_OPTS_MAX,
 829                                           enc_opts_policy, extack);
 830                 if (err)
 831                         return err;
 832
 833                 nla_opt_msk = nla_data(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
 834                 msk_depth = nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS_MASK]);
 835         }
 836
 837         nla_for_each_attr(nla_opt_key, nla_enc_key,
 838                           nla_len(tb[TCA_FLOWER_KEY_ENC_OPTS]), key_depth) {
 839                 switch (nla_type(nla_opt_key)) {
 840                 case TCA_FLOWER_KEY_ENC_OPTS_GENEVE:
 841                         option_len = 0;
 842                         key->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
 843                         option_len = fl_set_geneve_opt(nla_opt_key, key,
 844                                                        key_depth, option_len,
 845                                                        extack);
 846                         if (option_len < 0)
 847                                 return option_len;
 848
 849                         key->enc_opts.len += option_len;
 850                         /* At the same time we need to parse through the mask
 851                          * in order to verify exact and mask attribute lengths.
 852                          */
 853                         mask->enc_opts.dst_opt_type = TUNNEL_GENEVE_OPT;
 854                         option_len = fl_set_geneve_opt(nla_opt_msk, mask,
 855                                                        msk_depth, option_len,
 856                                                        extack);
 857                         if (option_len < 0)
 858                                 return option_len;
 859
 860                         mask->enc_opts.len += option_len;
 861                         if (key->enc_opts.len != mask->enc_opts.len) {
 862                                 NL_SET_ERR_MSG(extack, "Key and mask miss aligned");
 863                                 return -EINVAL;
 864                         }
 865
 866                         if (msk_depth)
 867                                 nla_opt_msk = nla_next(nla_opt_msk, &msk_depth);
 868                         break;
 869                 default:
 870                         NL_SET_ERR_MSG(extack, "Unknown tunnel option type");
 871                         return -EINVAL;
 872                 }
 873         }
 874
 875         return 0;
 876 }
 877
 878 static int fl_set_key(struct net *net, struct nlattr **tb,
 879                       struct fl_flow_key *key, struct fl_flow_key *mask,
 880                       struct netlink_ext_ack *extack)
 881 {
 882         __be16 ethertype;
 883         int ret = 0;
 884 #ifdef CONFIG_NET_CLS_IND
 885         if (tb[TCA_FLOWER_INDEV]) {
 886                 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV], extack);
 887                 if (err < 0)
 888                         return err;
 889                 key->indev_ifindex = err;
 890                 mask->indev_ifindex = 0xffffffff;
 891         }
 892 #endif
 893
 894         fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
 895                        mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
 896                        sizeof(key->eth.dst));
 897         fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
 898                        mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
 899                        sizeof(key->eth.src));
 900
 901         if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 902                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 903
 904                 if (eth_type_vlan(ethertype)) {
 905                         fl_set_key_vlan(tb, ethertype, TCA_FLOWER_KEY_VLAN_ID,
 906                                         TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan,
 907                                         &mask->vlan);
 908
 909                         if (tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]) {
 910                                 ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_VLAN_ETH_TYPE]);
 911                                 if (eth_type_vlan(ethertype)) {
 912                                         fl_set_key_vlan(tb, ethertype,
 913                                                         TCA_FLOWER_KEY_CVLAN_ID,
 914                                                         TCA_FLOWER_KEY_CVLAN_PRIO,
 915                                                         &key->cvlan, &mask->cvlan);
 916                                         fl_set_key_val(tb, &key->basic.n_proto,
 917                                                        TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
 918                                                        &mask->basic.n_proto,
 919                                                        TCA_FLOWER_UNSPEC,
 920                                                        sizeof(key->basic.n_proto));
 921                                 } else {
 922                                         key->basic.n_proto = ethertype;
 923                                         mask->basic.n_proto = cpu_to_be16(~0);
 924                                 }
 925                         }
 926                 } else {
 927                         key->basic.n_proto = ethertype;
 928                         mask->basic.n_proto = cpu_to_be16(~0);
 929                 }
 930         }
 931
 932         if (key->basic.n_proto == htons(ETH_P_IP) ||
 933             key->basic.n_proto == htons(ETH_P_IPV6)) {
 934                 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
 935                                &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
 936                                sizeof(key->basic.ip_proto));
 937                 fl_set_key_ip(tb, false, &key->ip, &mask->ip);
 938         }
 939
 940         if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
 941                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
 942                 mask->control.addr_type = ~0;
 943                 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
 944                                &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
 945                                sizeof(key->ipv4.src));
 946                 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
 947                                &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
 948                                sizeof(key->ipv4.dst));
 949         } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
 950                 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 951                 mask->control.addr_type = ~0;
 952                 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
 953                                &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
 954                                sizeof(key->ipv6.src));
 955                 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
 956                                &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
 957                                sizeof(key->ipv6.dst));
 958         }
 959
 960         if (key->basic.ip_proto == IPPROTO_TCP) {
 961                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
 962                                &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
 963                                sizeof(key->tp.src));
 964                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
 965                                &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
 966                                sizeof(key->tp.dst));
 967                 fl_set_key_val(tb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
 968                                &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
 969                                sizeof(key->tcp.flags));
 970         } else if (key->basic.ip_proto == IPPROTO_UDP) {
 971                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
 972                                &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
 973                                sizeof(key->tp.src));
 974                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
 975                                &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
 976                                sizeof(key->tp.dst));
 977         } else if (key->basic.ip_proto == IPPROTO_SCTP) {
 978                 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
 979                                &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
 980                                sizeof(key->tp.src));
 981                 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
 982                                &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
 983                                sizeof(key->tp.dst));
 984         } else if (key->basic.n_proto == htons(ETH_P_IP) &&
 985                    key->basic.ip_proto == IPPROTO_ICMP) {
 986                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV4_TYPE,
 987                                &mask->icmp.type,
 988                                TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
 989                                sizeof(key->icmp.type));
 990                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV4_CODE,
 991                                &mask->icmp.code,
 992                                TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
 993                                sizeof(key->icmp.code));
 994         } else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
 995                    key->basic.ip_proto == IPPROTO_ICMPV6) {
 996                 fl_set_key_val(tb, &key->icmp.type, TCA_FLOWER_KEY_ICMPV6_TYPE,
 997                                &mask->icmp.type,
 998                                TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
 999                                sizeof(key->icmp.type));
1000                 fl_set_key_val(tb, &key->icmp.code, TCA_FLOWER_KEY_ICMPV6_CODE,
1001                                &mask->icmp.code,
1002                                TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1003                                sizeof(key->icmp.code));
1004         } else if (key->basic.n_proto == htons(ETH_P_MPLS_UC) ||
1005                    key->basic.n_proto == htons(ETH_P_MPLS_MC)) {
1006                 ret = fl_set_key_mpls(tb, &key->mpls, &mask->mpls);
1007                 if (ret)
1008                         return ret;
1009         } else if (key->basic.n_proto == htons(ETH_P_ARP) ||
1010                    key->basic.n_proto == htons(ETH_P_RARP)) {
1011                 fl_set_key_val(tb, &key->arp.sip, TCA_FLOWER_KEY_ARP_SIP,
1012                                &mask->arp.sip, TCA_FLOWER_KEY_ARP_SIP_MASK,
1013                                sizeof(key->arp.sip));
1014                 fl_set_key_val(tb, &key->arp.tip, TCA_FLOWER_KEY_ARP_TIP,
1015                                &mask->arp.tip, TCA_FLOWER_KEY_ARP_TIP_MASK,
1016                                sizeof(key->arp.tip));
1017                 fl_set_key_val(tb, &key->arp.op, TCA_FLOWER_KEY_ARP_OP,
1018                                &mask->arp.op, TCA_FLOWER_KEY_ARP_OP_MASK,
1019                                sizeof(key->arp.op));
1020                 fl_set_key_val(tb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1021                                mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1022                                sizeof(key->arp.sha));
1023                 fl_set_key_val(tb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1024                                mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1025                                sizeof(key->arp.tha));
1026         }
1027
1028         if (key->basic.ip_proto == IPPROTO_TCP ||
1029             key->basic.ip_proto == IPPROTO_UDP ||
1030             key->basic.ip_proto == IPPROTO_SCTP) {
1031                 ret = fl_set_key_port_range(tb, key, mask);
1032                 if (ret)
1033                         return ret;
1034         }
1035
1036         if (tb[TCA_FLOWER_KEY_ENC_IPV4_SRC] ||
1037             tb[TCA_FLOWER_KEY_ENC_IPV4_DST]) {
1038                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
1039                 mask->enc_control.addr_type = ~0;
1040                 fl_set_key_val(tb, &key->enc_ipv4.src,
1041                                TCA_FLOWER_KEY_ENC_IPV4_SRC,
1042                                &mask->enc_ipv4.src,
1043                                TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1044                                sizeof(key->enc_ipv4.src));
1045                 fl_set_key_val(tb, &key->enc_ipv4.dst,
1046                                TCA_FLOWER_KEY_ENC_IPV4_DST,
1047                                &mask->enc_ipv4.dst,
1048                                TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1049                                sizeof(key->enc_ipv4.dst));
1050         }
1051
1052         if (tb[TCA_FLOWER_KEY_ENC_IPV6_SRC] ||
1053             tb[TCA_FLOWER_KEY_ENC_IPV6_DST]) {
1054                 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
1055                 mask->enc_control.addr_type = ~0;
1056                 fl_set_key_val(tb, &key->enc_ipv6.src,
1057                                TCA_FLOWER_KEY_ENC_IPV6_SRC,
1058                                &mask->enc_ipv6.src,
1059                                TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1060                                sizeof(key->enc_ipv6.src));
1061                 fl_set_key_val(tb, &key->enc_ipv6.dst,
1062                                TCA_FLOWER_KEY_ENC_IPV6_DST,
1063                                &mask->enc_ipv6.dst,
1064                                TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1065                                sizeof(key->enc_ipv6.dst));
1066         }
1067
1068         fl_set_key_val(tb, &key->enc_key_id.keyid, TCA_FLOWER_KEY_ENC_KEY_ID,
1069                        &mask->enc_key_id.keyid, TCA_FLOWER_UNSPEC,
1070                        sizeof(key->enc_key_id.keyid));
1071
1072         fl_set_key_val(tb, &key->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1073                        &mask->enc_tp.src, TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1074                        sizeof(key->enc_tp.src));
1075
1076         fl_set_key_val(tb, &key->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1077                        &mask->enc_tp.dst, TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1078                        sizeof(key->enc_tp.dst));
1079
1080         fl_set_key_ip(tb, true, &key->enc_ip, &mask->enc_ip);
1081
1082         if (tb[TCA_FLOWER_KEY_ENC_OPTS]) {
1083                 ret = fl_set_enc_opt(tb, key, mask, extack);
1084                 if (ret)
1085                         return ret;
1086         }
1087
1088         if (tb[TCA_FLOWER_KEY_FLAGS])
1089                 ret = fl_set_key_flags(tb, &key->control.flags, &mask->control.flags);
1090
1091         return ret;
1092 }
1093
1094 static void fl_mask_copy(struct fl_flow_mask *dst,
1095                          struct fl_flow_mask *src)
1096 {
1097         const void *psrc = fl_key_get_start(&src->key, src);
1098         void *pdst = fl_key_get_start(&dst->key, src);
1099
1100         memcpy(pdst, psrc, fl_mask_range(src));
1101         dst->range = src->range;
1102 }
1103
1104 static const struct rhashtable_params fl_ht_params = {
1105         .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
1106         .head_offset = offsetof(struct cls_fl_filter, ht_node),
1107         .automatic_shrinking = true,
1108 };
1109
1110 static int fl_init_mask_hashtable(struct fl_flow_mask *mask)
1111 {
1112         mask->filter_ht_params = fl_ht_params;
1113         mask->filter_ht_params.key_len = fl_mask_range(mask);
1114         mask->filter_ht_params.key_offset += mask->range.start;
1115
1116         return rhashtable_init(&mask->ht, &mask->filter_ht_params);
1117 }
1118
1119 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
1120 #define FL_KEY_MEMBER_SIZE(member) FIELD_SIZEOF(struct fl_flow_key, member)
1121
1122 #define FL_KEY_IS_MASKED(mask, member)                                          \
1123         memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member),               \
1124                    0, FL_KEY_MEMBER_SIZE(member))                               \
1125
1126 #define FL_KEY_SET(keys, cnt, id, member)                                       \
1127         do {                                                                    \
1128                 keys[cnt].key_id = id;                                          \
1129                 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member);                \
1130                 cnt++;                                                          \
1131         } while(0);
1132
1133 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member)                       \
1134         do {                                                                    \
1135                 if (FL_KEY_IS_MASKED(mask, member))                             \
1136                         FL_KEY_SET(keys, cnt, id, member);                      \
1137         } while(0);
1138
1139 static void fl_init_dissector(struct flow_dissector *dissector,
1140                               struct fl_flow_key *mask)
1141 {
1142         struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
1143         size_t cnt = 0;
1144
1145         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
1146         FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
1147         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1148                              FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
1149         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1150                              FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
1151         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1152                              FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
1153         if (FL_KEY_IS_MASKED(mask, tp) ||
1154             FL_KEY_IS_MASKED(mask, tp_min) || FL_KEY_IS_MASKED(mask, tp_max))
1155                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_PORTS, tp);
1156         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1157                              FLOW_DISSECTOR_KEY_IP, ip);
1158         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1159                              FLOW_DISSECTOR_KEY_TCP, tcp);
1160         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1161                              FLOW_DISSECTOR_KEY_ICMP, icmp);
1162         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1163                              FLOW_DISSECTOR_KEY_ARP, arp);
1164         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1165                              FLOW_DISSECTOR_KEY_MPLS, mpls);
1166         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1167                              FLOW_DISSECTOR_KEY_VLAN, vlan);
1168         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1169                              FLOW_DISSECTOR_KEY_CVLAN, cvlan);
1170         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1171                              FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
1172         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1173                              FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, enc_ipv4);
1174         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1175                              FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, enc_ipv6);
1176         if (FL_KEY_IS_MASKED(mask, enc_ipv4) ||
1177             FL_KEY_IS_MASKED(mask, enc_ipv6))
1178                 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_ENC_CONTROL,
1179                            enc_control);
1180         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1181                              FLOW_DISSECTOR_KEY_ENC_PORTS, enc_tp);
1182         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1183                              FLOW_DISSECTOR_KEY_ENC_IP, enc_ip);
1184         FL_KEY_SET_IF_MASKED(mask, keys, cnt,
1185                              FLOW_DISSECTOR_KEY_ENC_OPTS, enc_opts);
1186
1187         skb_flow_dissector_init(dissector, keys, cnt);
1188 }
1189
1190 static struct fl_flow_mask *fl_create_new_mask(struct cls_fl_head *head,
1191                                                struct fl_flow_mask *mask)
1192 {
1193         struct fl_flow_mask *newmask;
1194         int err;
1195
1196         newmask = kzalloc(sizeof(*newmask), GFP_KERNEL);
1197         if (!newmask)
1198                 return ERR_PTR(-ENOMEM);
1199
1200         fl_mask_copy(newmask, mask);
1201
1202         if ((newmask->key.tp_min.dst && newmask->key.tp_max.dst) ||
1203             (newmask->key.tp_min.src && newmask->key.tp_max.src))
1204                 newmask->flags |= TCA_FLOWER_MASK_FLAGS_RANGE;
1205
1206         err = fl_init_mask_hashtable(newmask);
1207         if (err)
1208                 goto errout_free;
1209
1210         fl_init_dissector(&newmask->dissector, &newmask->key);
1211
1212         INIT_LIST_HEAD_RCU(&newmask->filters);
1213
1214         err = rhashtable_insert_fast(&head->ht, &newmask->ht_node,
1215                                      mask_ht_params);
1216         if (err)
1217                 goto errout_destroy;
1218
1219         list_add_tail_rcu(&newmask->list, &head->masks);
1220
1221         return newmask;
1222
1223 errout_destroy:
1224         rhashtable_destroy(&newmask->ht);
1225 errout_free:
1226         kfree(newmask);
1227
1228         return ERR_PTR(err);
1229 }
1230
1231 static int fl_check_assign_mask(struct cls_fl_head *head,
1232                                 struct cls_fl_filter *fnew,
1233                                 struct cls_fl_filter *fold,
1234                                 struct fl_flow_mask *mask)
1235 {
1236         struct fl_flow_mask *newmask;
1237
1238         fnew->mask = rhashtable_lookup_fast(&head->ht, mask, mask_ht_params);
1239         if (!fnew->mask) {
1240                 if (fold)
1241                         return -EINVAL;
1242
1243                 newmask = fl_create_new_mask(head, mask);
1244                 if (IS_ERR(newmask))
1245                         return PTR_ERR(newmask);
1246
1247                 fnew->mask = newmask;
1248         } else if (fold && fold->mask != fnew->mask) {
1249                 return -EINVAL;
1250         }
1251
1252         return 0;
1253 }
1254
1255 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
1256                         struct cls_fl_filter *f, struct fl_flow_mask *mask,
1257                         unsigned long base, struct nlattr **tb,
1258                         struct nlattr *est, bool ovr,
1259                         struct fl_flow_tmplt *tmplt,
1260                         struct netlink_ext_ack *extack)
1261 {
1262         int err;
1263
1264         err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, extack);
1265         if (err < 0)
1266                 return err;
1267
1268         if (tb[TCA_FLOWER_CLASSID]) {
1269                 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
1270                 tcf_bind_filter(tp, &f->res, base);
1271         }
1272
1273         err = fl_set_key(net, tb, &f->key, &mask->key, extack);
1274         if (err)
1275                 return err;
1276
1277         fl_mask_update_range(mask);
1278         fl_set_masked_key(&f->mkey, &f->key, mask);
1279
1280         if (!fl_mask_fits_tmplt(tmplt, mask)) {
1281                 NL_SET_ERR_MSG_MOD(extack, "Mask does not fit the template");
1282                 return -EINVAL;
1283         }
1284
1285         return 0;
1286 }
1287
1288 static int fl_change(struct net *net, struct sk_buff *in_skb,
1289                      struct tcf_proto *tp, unsigned long base,
1290                      u32 handle, struct nlattr **tca,
1291                      void **arg, bool ovr, struct netlink_ext_ack *extack)
1292 {
1293         struct cls_fl_head *head = rtnl_dereference(tp->root);
1294         struct cls_fl_filter *fold = *arg;
1295         struct cls_fl_filter *fnew;
1296         struct nlattr **tb;
1297         struct fl_flow_mask mask = {};
1298         int err;
1299
1300         if (!tca[TCA_OPTIONS])
1301                 return -EINVAL;
1302
1303         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1304         if (!tb)
1305                 return -ENOBUFS;
1306
1307         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
1308                                fl_policy, NULL);
1309         if (err < 0)
1310                 goto errout_tb;
1311
1312         if (fold && handle && fold->handle != handle) {
1313                 err = -EINVAL;
1314                 goto errout_tb;
1315         }
1316
1317         fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
1318         if (!fnew) {
1319                 err = -ENOBUFS;
1320                 goto errout_tb;
1321         }
1322
1323         err = tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
1324         if (err < 0)
1325                 goto errout;
1326
1327         if (!handle) {
1328                 handle = 1;
1329                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1330                                     INT_MAX, GFP_KERNEL);
1331         } else if (!fold) {
1332                 /* user specifies a handle and it doesn't exist */
1333                 err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
1334                                     handle, GFP_KERNEL);
1335         }
1336         if (err)
1337                 goto errout;
1338         fnew->handle = handle;
1339
1340         if (tb[TCA_FLOWER_FLAGS]) {
1341                 fnew->flags = nla_get_u32(tb[TCA_FLOWER_FLAGS]);
1342
1343                 if (!tc_flags_valid(fnew->flags)) {
1344                         err = -EINVAL;
1345                         goto errout_idr;
1346                 }
1347         }
1348
1349         err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr,
1350                            tp->chain->tmplt_priv, extack);
1351         if (err)
1352                 goto errout_idr;
1353
1354         err = fl_check_assign_mask(head, fnew, fold, &mask);
1355         if (err)
1356                 goto errout_idr;
1357
1358         if (!fold && __fl_lookup(fnew->mask, &fnew->mkey)) {
1359                 err = -EEXIST;
1360                 goto errout_mask;
1361         }
1362
1363         err = rhashtable_insert_fast(&fnew->mask->ht, &fnew->ht_node,
1364                                      fnew->mask->filter_ht_params);
1365         if (err)
1366                 goto errout_mask;
1367
1368         if (!tc_skip_hw(fnew->flags)) {
1369                 err = fl_hw_replace_filter(tp, fnew, extack);
1370                 if (err)
1371                         goto errout_mask;
1372         }
1373
1374         if (!tc_in_hw(fnew->flags))
1375                 fnew->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
1376
1377         if (fold) {
1378                 if (!tc_skip_sw(fold->flags))
1379                         rhashtable_remove_fast(&fold->mask->ht,
1380                                                &fold->ht_node,
1381                                                fold->mask->filter_ht_params);
1382                 if (!tc_skip_hw(fold->flags))
1383                         fl_hw_destroy_filter(tp, fold, NULL);
1384         }
1385
1386         *arg = fnew;
1387
1388         if (fold) {
1389                 idr_replace(&head->handle_idr, fnew, fnew->handle);
1390                 list_replace_rcu(&fold->list, &fnew->list);
1391                 tcf_unbind_filter(tp, &fold->res);
1392                 tcf_exts_get_net(&fold->exts);
1393                 tcf_queue_work(&fold->rwork, fl_destroy_filter_work);
1394         } else {
1395                 list_add_tail_rcu(&fnew->list, &fnew->mask->filters);
1396         }
1397
1398         kfree(tb);
1399         return 0;
1400
1401 errout_mask:
1402         fl_mask_put(head, fnew->mask, false);
1403
1404 errout_idr:
1405         if (!fold)
1406                 idr_remove(&head->handle_idr, fnew->handle);
1407 errout:
1408         tcf_exts_destroy(&fnew->exts);
1409         kfree(fnew);
1410 errout_tb:
1411         kfree(tb);
1412         return err;
1413 }
1414
1415 static int fl_delete(struct tcf_proto *tp, void *arg, bool *last,
1416                      struct netlink_ext_ack *extack)
1417 {
1418         struct cls_fl_head *head = rtnl_dereference(tp->root);
1419         struct cls_fl_filter *f = arg;
1420
1421         rhashtable_remove_fast(&f->mask->ht, &f->ht_node,
1422                                f->mask->filter_ht_params);
1423         __fl_delete(tp, f, extack);
1424         *last = list_empty(&head->masks);
1425         return 0;
1426 }
1427
1428 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
1429 {
1430         struct cls_fl_head *head = rtnl_dereference(tp->root);
1431         struct cls_fl_filter *f;
1432
1433         arg->count = arg->skip;
1434
1435         while ((f = idr_get_next_ul(&head->handle_idr,
1436                                     &arg->cookie)) != NULL) {
1437                 if (arg->fn(tp, f, arg) < 0) {
1438                         arg->stop = 1;
1439                         break;
1440                 }
1441                 arg->cookie = f->handle + 1;
1442                 arg->count++;
1443         }
1444 }
1445
1446 static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
1447                         void *cb_priv, struct netlink_ext_ack *extack)
1448 {
1449         struct cls_fl_head *head = rtnl_dereference(tp->root);
1450         struct tc_cls_flower_offload cls_flower = {};
1451         struct tcf_block *block = tp->chain->block;
1452         struct fl_flow_mask *mask;
1453         struct cls_fl_filter *f;
1454         int err;
1455
1456         list_for_each_entry(mask, &head->masks, list) {
1457                 list_for_each_entry(f, &mask->filters, list) {
1458                         if (tc_skip_hw(f->flags))
1459                                 continue;
1460
1461                         tc_cls_common_offload_init(&cls_flower.common, tp,
1462                                                    f->flags, extack);
1463                         cls_flower.command = add ?
1464                                 TC_CLSFLOWER_REPLACE : TC_CLSFLOWER_DESTROY;
1465                         cls_flower.cookie = (unsigned long)f;
1466                         cls_flower.dissector = &mask->dissector;
1467                         cls_flower.mask = &mask->key;
1468                         cls_flower.key = &f->mkey;
1469                         cls_flower.exts = &f->exts;
1470                         cls_flower.classid = f->res.classid;
1471
1472                         err = cb(TC_SETUP_CLSFLOWER, &cls_flower, cb_priv);
1473                         if (err) {
1474                                 if (add && tc_skip_sw(f->flags))
1475                                         return err;
1476                                 continue;
1477                         }
1478
1479                         tc_cls_offload_cnt_update(block, &f->in_hw_count,
1480                                                   &f->flags, add);
1481                 }
1482         }
1483
1484         return 0;
1485 }
1486
1487 static void fl_hw_create_tmplt(struct tcf_chain *chain,
1488                                struct fl_flow_tmplt *tmplt)
1489 {
1490         struct tc_cls_flower_offload cls_flower = {};
1491         struct tcf_block *block = chain->block;
1492         struct tcf_exts dummy_exts = { 0, };
1493
1494         cls_flower.common.chain_index = chain->index;
1495         cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE;
1496         cls_flower.cookie = (unsigned long) tmplt;
1497         cls_flower.dissector = &tmplt->dissector;
1498         cls_flower.mask = &tmplt->mask;
1499         cls_flower.key = &tmplt->dummy_key;
1500         cls_flower.exts = &dummy_exts;
1501
1502         /* We don't care if driver (any of them) fails to handle this
1503          * call. It serves just as a hint for it.
1504          */
1505         tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER,
1506                          &cls_flower, false);
1507 }
1508
1509 static void fl_hw_destroy_tmplt(struct tcf_chain *chain,
1510                                 struct fl_flow_tmplt *tmplt)
1511 {
1512         struct tc_cls_flower_offload cls_flower = {};
1513         struct tcf_block *block = chain->block;
1514
1515         cls_flower.common.chain_index = chain->index;
1516         cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY;
1517         cls_flower.cookie = (unsigned long) tmplt;
1518
1519         tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER,
1520                          &cls_flower, false);
1521 }
1522
1523 static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,
1524                              struct nlattr **tca,
1525                              struct netlink_ext_ack *extack)
1526 {
1527         struct fl_flow_tmplt *tmplt;
1528         struct nlattr **tb;
1529         int err;
1530
1531         if (!tca[TCA_OPTIONS])
1532                 return ERR_PTR(-EINVAL);
1533
1534         tb = kcalloc(TCA_FLOWER_MAX + 1, sizeof(struct nlattr *), GFP_KERNEL);
1535         if (!tb)
1536                 return ERR_PTR(-ENOBUFS);
1537         err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS],
1538                                fl_policy, NULL);
1539         if (err)
1540                 goto errout_tb;
1541
1542         tmplt = kzalloc(sizeof(*tmplt), GFP_KERNEL);
1543         if (!tmplt) {
1544                 err = -ENOMEM;
1545                 goto errout_tb;
1546         }
1547         tmplt->chain = chain;
1548         err = fl_set_key(net, tb, &tmplt->dummy_key, &tmplt->mask, extack);
1549         if (err)
1550                 goto errout_tmplt;
1551         kfree(tb);
1552
1553         fl_init_dissector(&tmplt->dissector, &tmplt->mask);
1554
1555         fl_hw_create_tmplt(chain, tmplt);
1556
1557         return tmplt;
1558
1559 errout_tmplt:
1560         kfree(tmplt);
1561 errout_tb:
1562         kfree(tb);
1563         return ERR_PTR(err);
1564 }
1565
1566 static void fl_tmplt_destroy(void *tmplt_priv)
1567 {
1568         struct fl_flow_tmplt *tmplt = tmplt_priv;
1569
1570         fl_hw_destroy_tmplt(tmplt->chain, tmplt);
1571         kfree(tmplt);
1572 }
1573
1574 static int fl_dump_key_val(struct sk_buff *skb,
1575                            void *val, int val_type,
1576                            void *mask, int mask_type, int len)
1577 {
1578         int err;
1579
1580         if (!memchr_inv(mask, 0, len))
1581                 return 0;
1582         err = nla_put(skb, val_type, len, val);
1583         if (err)
1584                 return err;
1585         if (mask_type != TCA_FLOWER_UNSPEC) {
1586                 err = nla_put(skb, mask_type, len, mask);
1587                 if (err)
1588                         return err;
1589         }
1590         return 0;
1591 }
1592
1593 static int fl_dump_key_port_range(struct sk_buff *skb, struct fl_flow_key *key,
1594                                   struct fl_flow_key *mask)
1595 {
1596         if (fl_dump_key_val(skb, &key->tp_min.dst, TCA_FLOWER_KEY_PORT_DST_MIN,
1597                             &mask->tp_min.dst, TCA_FLOWER_UNSPEC,
1598                             sizeof(key->tp_min.dst)) ||
1599             fl_dump_key_val(skb, &key->tp_max.dst, TCA_FLOWER_KEY_PORT_DST_MAX,
1600                             &mask->tp_max.dst, TCA_FLOWER_UNSPEC,
1601                             sizeof(key->tp_max.dst)) ||
1602             fl_dump_key_val(skb, &key->tp_min.src, TCA_FLOWER_KEY_PORT_SRC_MIN,
1603                             &mask->tp_min.src, TCA_FLOWER_UNSPEC,
1604                             sizeof(key->tp_min.src)) ||
1605             fl_dump_key_val(skb, &key->tp_max.src, TCA_FLOWER_KEY_PORT_SRC_MAX,
1606                             &mask->tp_max.src, TCA_FLOWER_UNSPEC,
1607                             sizeof(key->tp_max.src)))
1608                 return -1;
1609
1610         return 0;
1611 }
1612
1613 static int fl_dump_key_mpls(struct sk_buff *skb,
1614                             struct flow_dissector_key_mpls *mpls_key,
1615                             struct flow_dissector_key_mpls *mpls_mask)
1616 {
1617         int err;
1618
1619         if (!memchr_inv(mpls_mask, 0, sizeof(*mpls_mask)))
1620                 return 0;
1621         if (mpls_mask->mpls_ttl) {
1622                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TTL,
1623                                  mpls_key->mpls_ttl);
1624                 if (err)
1625                         return err;
1626         }
1627         if (mpls_mask->mpls_tc) {
1628                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_TC,
1629                                  mpls_key->mpls_tc);
1630                 if (err)
1631                         return err;
1632         }
1633         if (mpls_mask->mpls_label) {
1634                 err = nla_put_u32(skb, TCA_FLOWER_KEY_MPLS_LABEL,
1635                                   mpls_key->mpls_label);
1636                 if (err)
1637                         return err;
1638         }
1639         if (mpls_mask->mpls_bos) {
1640                 err = nla_put_u8(skb, TCA_FLOWER_KEY_MPLS_BOS,
1641                                  mpls_key->mpls_bos);
1642                 if (err)
1643                         return err;
1644         }
1645         return 0;
1646 }
1647
1648 static int fl_dump_key_ip(struct sk_buff *skb, bool encap,
1649                           struct flow_dissector_key_ip *key,
1650                           struct flow_dissector_key_ip *mask)
1651 {
1652         int tos_key = encap ? TCA_FLOWER_KEY_ENC_IP_TOS : TCA_FLOWER_KEY_IP_TOS;
1653         int ttl_key = encap ? TCA_FLOWER_KEY_ENC_IP_TTL : TCA_FLOWER_KEY_IP_TTL;
1654         int tos_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TOS_MASK : TCA_FLOWER_KEY_IP_TOS_MASK;
1655         int ttl_mask = encap ? TCA_FLOWER_KEY_ENC_IP_TTL_MASK : TCA_FLOWER_KEY_IP_TTL_MASK;
1656
1657         if (fl_dump_key_val(skb, &key->tos, tos_key, &mask->tos, tos_mask, sizeof(key->tos)) ||
1658             fl_dump_key_val(skb, &key->ttl, ttl_key, &mask->ttl, ttl_mask, sizeof(key->ttl)))
1659                 return -1;
1660
1661         return 0;
1662 }
1663
1664 static int fl_dump_key_vlan(struct sk_buff *skb,
1665                             int vlan_id_key, int vlan_prio_key,
1666                             struct flow_dissector_key_vlan *vlan_key,
1667                             struct flow_dissector_key_vlan *vlan_mask)
1668 {
1669         int err;
1670
1671         if (!memchr_inv(vlan_mask, 0, sizeof(*vlan_mask)))
1672                 return 0;
1673         if (vlan_mask->vlan_id) {
1674                 err = nla_put_u16(skb, vlan_id_key,
1675                                   vlan_key->vlan_id);
1676                 if (err)
1677                         return err;
1678         }
1679         if (vlan_mask->vlan_priority) {
1680                 err = nla_put_u8(skb, vlan_prio_key,
1681                                  vlan_key->vlan_priority);
1682                 if (err)
1683                         return err;
1684         }
1685         return 0;
1686 }
1687
1688 static void fl_get_key_flag(u32 dissector_key, u32 dissector_mask,
1689                             u32 *flower_key, u32 *flower_mask,
1690                             u32 flower_flag_bit, u32 dissector_flag_bit)
1691 {
1692         if (dissector_mask & dissector_flag_bit) {
1693                 *flower_mask |= flower_flag_bit;
1694                 if (dissector_key & dissector_flag_bit)
1695                         *flower_key |= flower_flag_bit;
1696         }
1697 }
1698
1699 static int fl_dump_key_flags(struct sk_buff *skb, u32 flags_key, u32 flags_mask)
1700 {
1701         u32 key, mask;
1702         __be32 _key, _mask;
1703         int err;
1704
1705         if (!memchr_inv(&flags_mask, 0, sizeof(flags_mask)))
1706                 return 0;
1707
1708         key = 0;
1709         mask = 0;
1710
1711         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1712                         TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT, FLOW_DIS_IS_FRAGMENT);
1713         fl_get_key_flag(flags_key, flags_mask, &key, &mask,
1714                         TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST,
1715                         FLOW_DIS_FIRST_FRAG);
1716
1717         _key = cpu_to_be32(key);
1718         _mask = cpu_to_be32(mask);
1719
1720         err = nla_put(skb, TCA_FLOWER_KEY_FLAGS, 4, &_key);
1721         if (err)
1722                 return err;
1723
1724         return nla_put(skb, TCA_FLOWER_KEY_FLAGS_MASK, 4, &_mask);
1725 }
1726
1727 static int fl_dump_key_geneve_opt(struct sk_buff *skb,
1728                                   struct flow_dissector_key_enc_opts *enc_opts)
1729 {
1730         struct geneve_opt *opt;
1731         struct nlattr *nest;
1732         int opt_off = 0;
1733
1734         nest = nla_nest_start(skb, TCA_FLOWER_KEY_ENC_OPTS_GENEVE);
1735         if (!nest)
1736                 goto nla_put_failure;
1737
1738         while (enc_opts->len > opt_off) {
1739                 opt = (struct geneve_opt *)&enc_opts->data[opt_off];
1740
1741                 if (nla_put_be16(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_CLASS,
1742                                  opt->opt_class))
1743                         goto nla_put_failure;
1744                 if (nla_put_u8(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_TYPE,
1745                                opt->type))
1746                         goto nla_put_failure;
1747                 if (nla_put(skb, TCA_FLOWER_KEY_ENC_OPT_GENEVE_DATA,
1748                             opt->length * 4, opt->opt_data))
1749                         goto nla_put_failure;
1750
1751                 opt_off += sizeof(struct geneve_opt) + opt->length * 4;
1752         }
1753         nla_nest_end(skb, nest);
1754         return 0;
1755
1756 nla_put_failure:
1757         nla_nest_cancel(skb, nest);
1758         return -EMSGSIZE;
1759 }
1760
1761 static int fl_dump_key_options(struct sk_buff *skb, int enc_opt_type,
1762                                struct flow_dissector_key_enc_opts *enc_opts)
1763 {
1764         struct nlattr *nest;
1765         int err;
1766
1767         if (!enc_opts->len)
1768                 return 0;
1769
1770         nest = nla_nest_start(skb, enc_opt_type);
1771         if (!nest)
1772                 goto nla_put_failure;
1773
1774         switch (enc_opts->dst_opt_type) {
1775         case TUNNEL_GENEVE_OPT:
1776                 err = fl_dump_key_geneve_opt(skb, enc_opts);
1777                 if (err)
1778                         goto nla_put_failure;
1779                 break;
1780         default:
1781                 goto nla_put_failure;
1782         }
1783         nla_nest_end(skb, nest);
1784         return 0;
1785
1786 nla_put_failure:
1787         nla_nest_cancel(skb, nest);
1788         return -EMSGSIZE;
1789 }
1790
1791 static int fl_dump_key_enc_opt(struct sk_buff *skb,
1792                                struct flow_dissector_key_enc_opts *key_opts,
1793                                struct flow_dissector_key_enc_opts *msk_opts)
1794 {
1795         int err;
1796
1797         err = fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS, key_opts);
1798         if (err)
1799                 return err;
1800
1801         return fl_dump_key_options(skb, TCA_FLOWER_KEY_ENC_OPTS_MASK, msk_opts);
1802 }
1803
1804 static int fl_dump_key(struct sk_buff *skb, struct net *net,
1805                        struct fl_flow_key *key, struct fl_flow_key *mask)
1806 {
1807         if (mask->indev_ifindex) {
1808                 struct net_device *dev;
1809
1810                 dev = __dev_get_by_index(net, key->indev_ifindex);
1811                 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
1812                         goto nla_put_failure;
1813         }
1814
1815         if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
1816                             mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
1817                             sizeof(key->eth.dst)) ||
1818             fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
1819                             mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
1820                             sizeof(key->eth.src)) ||
1821             fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
1822                             &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
1823                             sizeof(key->basic.n_proto)))
1824                 goto nla_put_failure;
1825
1826         if (fl_dump_key_mpls(skb, &key->mpls, &mask->mpls))
1827                 goto nla_put_failure;
1828
1829         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_VLAN_ID,
1830                              TCA_FLOWER_KEY_VLAN_PRIO, &key->vlan, &mask->vlan))
1831                 goto nla_put_failure;
1832
1833         if (fl_dump_key_vlan(skb, TCA_FLOWER_KEY_CVLAN_ID,
1834                              TCA_FLOWER_KEY_CVLAN_PRIO,
1835                              &key->cvlan, &mask->cvlan) ||
1836             (mask->cvlan.vlan_tpid &&
1837              nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1838                           key->cvlan.vlan_tpid)))
1839                 goto nla_put_failure;
1840
1841         if (mask->basic.n_proto) {
1842                 if (mask->cvlan.vlan_tpid) {
1843                         if (nla_put_be16(skb, TCA_FLOWER_KEY_CVLAN_ETH_TYPE,
1844                                          key->basic.n_proto))
1845                                 goto nla_put_failure;
1846                 } else if (mask->vlan.vlan_tpid) {
1847                         if (nla_put_be16(skb, TCA_FLOWER_KEY_VLAN_ETH_TYPE,
1848                                          key->basic.n_proto))
1849                                 goto nla_put_failure;
1850                 }
1851         }
1852
1853         if ((key->basic.n_proto == htons(ETH_P_IP) ||
1854              key->basic.n_proto == htons(ETH_P_IPV6)) &&
1855             (fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
1856                             &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
1857                             sizeof(key->basic.ip_proto)) ||
1858             fl_dump_key_ip(skb, false, &key->ip, &mask->ip)))
1859                 goto nla_put_failure;
1860
1861         if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1862             (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
1863                              &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
1864                              sizeof(key->ipv4.src)) ||
1865              fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
1866                              &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
1867                              sizeof(key->ipv4.dst))))
1868                 goto nla_put_failure;
1869         else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1870                  (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
1871                                   &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
1872                                   sizeof(key->ipv6.src)) ||
1873                   fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
1874                                   &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
1875                                   sizeof(key->ipv6.dst))))
1876                 goto nla_put_failure;
1877
1878         if (key->basic.ip_proto == IPPROTO_TCP &&
1879             (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
1880                              &mask->tp.src, TCA_FLOWER_KEY_TCP_SRC_MASK,
1881                              sizeof(key->tp.src)) ||
1882              fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
1883                              &mask->tp.dst, TCA_FLOWER_KEY_TCP_DST_MASK,
1884                              sizeof(key->tp.dst)) ||
1885              fl_dump_key_val(skb, &key->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS,
1886                              &mask->tcp.flags, TCA_FLOWER_KEY_TCP_FLAGS_MASK,
1887                              sizeof(key->tcp.flags))))
1888                 goto nla_put_failure;
1889         else if (key->basic.ip_proto == IPPROTO_UDP &&
1890                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
1891                                   &mask->tp.src, TCA_FLOWER_KEY_UDP_SRC_MASK,
1892                                   sizeof(key->tp.src)) ||
1893                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
1894                                   &mask->tp.dst, TCA_FLOWER_KEY_UDP_DST_MASK,
1895                                   sizeof(key->tp.dst))))
1896                 goto nla_put_failure;
1897         else if (key->basic.ip_proto == IPPROTO_SCTP &&
1898                  (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_SCTP_SRC,
1899                                   &mask->tp.src, TCA_FLOWER_KEY_SCTP_SRC_MASK,
1900                                   sizeof(key->tp.src)) ||
1901                   fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_SCTP_DST,
1902                                   &mask->tp.dst, TCA_FLOWER_KEY_SCTP_DST_MASK,
1903                                   sizeof(key->tp.dst))))
1904                 goto nla_put_failure;
1905         else if (key->basic.n_proto == htons(ETH_P_IP) &&
1906                  key->basic.ip_proto == IPPROTO_ICMP &&
1907                  (fl_dump_key_val(skb, &key->icmp.type,
1908                                   TCA_FLOWER_KEY_ICMPV4_TYPE, &mask->icmp.type,
1909                                   TCA_FLOWER_KEY_ICMPV4_TYPE_MASK,
1910                                   sizeof(key->icmp.type)) ||
1911                   fl_dump_key_val(skb, &key->icmp.code,
1912                                   TCA_FLOWER_KEY_ICMPV4_CODE, &mask->icmp.code,
1913                                   TCA_FLOWER_KEY_ICMPV4_CODE_MASK,
1914                                   sizeof(key->icmp.code))))
1915                 goto nla_put_failure;
1916         else if (key->basic.n_proto == htons(ETH_P_IPV6) &&
1917                  key->basic.ip_proto == IPPROTO_ICMPV6 &&
1918                  (fl_dump_key_val(skb, &key->icmp.type,
1919                                   TCA_FLOWER_KEY_ICMPV6_TYPE, &mask->icmp.type,
1920                                   TCA_FLOWER_KEY_ICMPV6_TYPE_MASK,
1921                                   sizeof(key->icmp.type)) ||
1922                   fl_dump_key_val(skb, &key->icmp.code,
1923                                   TCA_FLOWER_KEY_ICMPV6_CODE, &mask->icmp.code,
1924                                   TCA_FLOWER_KEY_ICMPV6_CODE_MASK,
1925                                   sizeof(key->icmp.code))))
1926                 goto nla_put_failure;
1927         else if ((key->basic.n_proto == htons(ETH_P_ARP) ||
1928                   key->basic.n_proto == htons(ETH_P_RARP)) &&
1929                  (fl_dump_key_val(skb, &key->arp.sip,
1930                                   TCA_FLOWER_KEY_ARP_SIP, &mask->arp.sip,
1931                                   TCA_FLOWER_KEY_ARP_SIP_MASK,
1932                                   sizeof(key->arp.sip)) ||
1933                   fl_dump_key_val(skb, &key->arp.tip,
1934                                   TCA_FLOWER_KEY_ARP_TIP, &mask->arp.tip,
1935                                   TCA_FLOWER_KEY_ARP_TIP_MASK,
1936                                   sizeof(key->arp.tip)) ||
1937                   fl_dump_key_val(skb, &key->arp.op,
1938                                   TCA_FLOWER_KEY_ARP_OP, &mask->arp.op,
1939                                   TCA_FLOWER_KEY_ARP_OP_MASK,
1940                                   sizeof(key->arp.op)) ||
1941                   fl_dump_key_val(skb, key->arp.sha, TCA_FLOWER_KEY_ARP_SHA,
1942                                   mask->arp.sha, TCA_FLOWER_KEY_ARP_SHA_MASK,
1943                                   sizeof(key->arp.sha)) ||
1944                   fl_dump_key_val(skb, key->arp.tha, TCA_FLOWER_KEY_ARP_THA,
1945                                   mask->arp.tha, TCA_FLOWER_KEY_ARP_THA_MASK,
1946                                   sizeof(key->arp.tha))))
1947                 goto nla_put_failure;
1948
1949         if ((key->basic.ip_proto == IPPROTO_TCP ||
1950              key->basic.ip_proto == IPPROTO_UDP ||
1951              key->basic.ip_proto == IPPROTO_SCTP) &&
1952              fl_dump_key_port_range(skb, key, mask))
1953                 goto nla_put_failure;
1954
1955         if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
1956             (fl_dump_key_val(skb, &key->enc_ipv4.src,
1957                             TCA_FLOWER_KEY_ENC_IPV4_SRC, &mask->enc_ipv4.src,
1958                             TCA_FLOWER_KEY_ENC_IPV4_SRC_MASK,
1959                             sizeof(key->enc_ipv4.src)) ||
1960              fl_dump_key_val(skb, &key->enc_ipv4.dst,
1961                              TCA_FLOWER_KEY_ENC_IPV4_DST, &mask->enc_ipv4.dst,
1962                              TCA_FLOWER_KEY_ENC_IPV4_DST_MASK,
1963                              sizeof(key->enc_ipv4.dst))))
1964                 goto nla_put_failure;
1965         else if (key->enc_control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
1966                  (fl_dump_key_val(skb, &key->enc_ipv6.src,
1967                             TCA_FLOWER_KEY_ENC_IPV6_SRC, &mask->enc_ipv6.src,
1968                             TCA_FLOWER_KEY_ENC_IPV6_SRC_MASK,
1969                             sizeof(key->enc_ipv6.src)) ||
1970                  fl_dump_key_val(skb, &key->enc_ipv6.dst,
1971                                  TCA_FLOWER_KEY_ENC_IPV6_DST,
1972                                  &mask->enc_ipv6.dst,
1973                                  TCA_FLOWER_KEY_ENC_IPV6_DST_MASK,
1974                             sizeof(key->enc_ipv6.dst))))
1975                 goto nla_put_failure;
1976
1977         if (fl_dump_key_val(skb, &key->enc_key_id, TCA_FLOWER_KEY_ENC_KEY_ID,
1978                             &mask->enc_key_id, TCA_FLOWER_UNSPEC,
1979                             sizeof(key->enc_key_id)) ||
1980             fl_dump_key_val(skb, &key->enc_tp.src,
1981                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT,
1982                             &mask->enc_tp.src,
1983                             TCA_FLOWER_KEY_ENC_UDP_SRC_PORT_MASK,
1984                             sizeof(key->enc_tp.src)) ||
1985             fl_dump_key_val(skb, &key->enc_tp.dst,
1986                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT,
1987                             &mask->enc_tp.dst,
1988                             TCA_FLOWER_KEY_ENC_UDP_DST_PORT_MASK,
1989                             sizeof(key->enc_tp.dst)) ||
1990             fl_dump_key_ip(skb, true, &key->enc_ip, &mask->enc_ip) ||
1991             fl_dump_key_enc_opt(skb, &key->enc_opts, &mask->enc_opts))
1992                 goto nla_put_failure;
1993
1994         if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
1995                 goto nla_put_failure;
1996
1997         return 0;
1998
1999 nla_put_failure:
2000         return -EMSGSIZE;
2001 }
2002
2003 static int fl_dump(struct net *net, struct tcf_proto *tp, void *fh,
2004                    struct sk_buff *skb, struct tcmsg *t)
2005 {
2006         struct cls_fl_filter *f = fh;
2007         struct nlattr *nest;
2008         struct fl_flow_key *key, *mask;
2009
2010         if (!f)
2011                 return skb->len;
2012
2013         t->tcm_handle = f->handle;
2014
2015         nest = nla_nest_start(skb, TCA_OPTIONS);
2016         if (!nest)
2017                 goto nla_put_failure;
2018
2019         if (f->res.classid &&
2020             nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
2021                 goto nla_put_failure;
2022
2023         key = &f->key;
2024         mask = &f->mask->key;
2025
2026         if (fl_dump_key(skb, net, key, mask))
2027                 goto nla_put_failure;
2028
2029         if (!tc_skip_hw(f->flags))
2030                 fl_hw_update_stats(tp, f);
2031
2032         if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
2033                 goto nla_put_failure;
2034
2035         if (nla_put_u32(skb, TCA_FLOWER_IN_HW_COUNT, f->in_hw_count))
2036                 goto nla_put_failure;
2037
2038         if (tcf_exts_dump(skb, &f->exts))
2039                 goto nla_put_failure;
2040
2041         nla_nest_end(skb, nest);
2042
2043         if (tcf_exts_dump_stats(skb, &f->exts) < 0)
2044                 goto nla_put_failure;
2045
2046         return skb->len;
2047
2048 nla_put_failure:
2049         nla_nest_cancel(skb, nest);
2050         return -1;
2051 }
2052
2053 static int fl_tmplt_dump(struct sk_buff *skb, struct net *net, void *tmplt_priv)
2054 {
2055         struct fl_flow_tmplt *tmplt = tmplt_priv;
2056         struct fl_flow_key *key, *mask;
2057         struct nlattr *nest;
2058
2059         nest = nla_nest_start(skb, TCA_OPTIONS);
2060         if (!nest)
2061                 goto nla_put_failure;
2062
2063         key = &tmplt->dummy_key;
2064         mask = &tmplt->mask;
2065
2066         if (fl_dump_key(skb, net, key, mask))
2067                 goto nla_put_failure;
2068
2069         nla_nest_end(skb, nest);
2070
2071         return skb->len;
2072
2073 nla_put_failure:
2074         nla_nest_cancel(skb, nest);
2075         return -EMSGSIZE;
2076 }
2077
2078 static void fl_bind_class(void *fh, u32 classid, unsigned long cl)
2079 {
2080         struct cls_fl_filter *f = fh;
2081
2082         if (f && f->res.classid == classid)
2083                 f->res.class = cl;
2084 }
2085
2086 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
2087         .kind           = "flower",
2088         .classify       = fl_classify,
2089         .init           = fl_init,
2090         .destroy        = fl_destroy,
2091         .get            = fl_get,
2092         .change         = fl_change,
2093         .delete         = fl_delete,
2094         .walk           = fl_walk,
2095         .reoffload      = fl_reoffload,
2096         .dump           = fl_dump,
2097         .bind_class     = fl_bind_class,
2098         .tmplt_create   = fl_tmplt_create,
2099         .tmplt_destroy  = fl_tmplt_destroy,
2100         .tmplt_dump     = fl_tmplt_dump,
2101         .owner          = THIS_MODULE,
2102 };
2103
2104 static int __init cls_fl_init(void)
2105 {
2106         return register_tcf_proto_ops(&cls_fl_ops);
2107 }
2108
2109 static void __exit cls_fl_exit(void)
2110 {
2111         unregister_tcf_proto_ops(&cls_fl_ops);
2112 }
2113
2114 module_init(cls_fl_init);
2115 module_exit(cls_fl_exit);
2116
2117 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
2118 MODULE_DESCRIPTION("Flower classifier");
2119 MODULE_LICENSE("GPL v2");