drivers/net/bonding/bond_netlink.c

   1 /*
   2  * drivers/net/bond/bond_netlink.c - Netlink interface for bonding
   3  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   4  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/errno.h>
  16 #include <linux/netdevice.h>
  17 #include <linux/etherdevice.h>
  18 #include <linux/if_link.h>
  19 #include <linux/if_ether.h>
  20 #include <net/netlink.h>
  21 #include <net/rtnetlink.h>
  22 #include "bonding.h"
  23
  24 int bond_get_slave(struct net_device *slave_dev, struct sk_buff *skb)
  25 {
  26         struct slave *slave = bond_slave_get_rtnl(slave_dev);
  27         const struct aggregator *agg;
  28
  29         if (nla_put_u8(skb, IFLA_SLAVE_STATE, bond_slave_state(slave)))
  30                 goto nla_put_failure;
  31
  32         if (nla_put_u8(skb, IFLA_SLAVE_MII_STATUS, slave->link))
  33                 goto nla_put_failure;
  34
  35         if (nla_put_u32(skb, IFLA_SLAVE_LINK_FAILURE_COUNT,
  36                         slave->link_failure_count))
  37                 goto nla_put_failure;
  38
  39         if (nla_put(skb, IFLA_SLAVE_PERM_HWADDR,
  40                     slave_dev->addr_len, slave->perm_hwaddr))
  41                 goto nla_put_failure;
  42
  43         if (nla_put_u16(skb, IFLA_SLAVE_QUEUE_ID, slave->queue_id))
  44                 goto nla_put_failure;
  45
  46         if (slave->bond->params.mode == BOND_MODE_8023AD) {
  47                 agg = SLAVE_AD_INFO(slave).port.aggregator;
  48                 if (agg)
  49                         if (nla_put_u16(skb, IFLA_SLAVE_AD_AGGREGATOR_ID,
  50                                         agg->aggregator_identifier))
  51                                 goto nla_put_failure;
  52         }
  53
  54         return 0;
  55
  56 nla_put_failure:
  57         return -EMSGSIZE;
  58 }
  59
  60 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
  61         [IFLA_BOND_MODE]                = { .type = NLA_U8 },
  62         [IFLA_BOND_ACTIVE_SLAVE]        = { .type = NLA_U32 },
  63         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  64         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  65         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
  66         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
  67         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
  68         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
  69         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
  70         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
  71         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
  72         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
  73         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
  74         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
  75         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
  76         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
  77         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
  78         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
  79         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
  80         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
  81         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
  82         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
  83         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
  84 };
  85
  86 static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
  87 {
  88         if (tb[IFLA_ADDRESS]) {
  89                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
  90                         return -EINVAL;
  91                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
  92                         return -EADDRNOTAVAIL;
  93         }
  94         return 0;
  95 }
  96
  97 static int bond_changelink(struct net_device *bond_dev,
  98                            struct nlattr *tb[], struct nlattr *data[])
  99 {
 100         struct bonding *bond = netdev_priv(bond_dev);
 101         struct bond_opt_value newval;
 102         int miimon = 0;
 103         int err;
 104
 105         if (!data)
 106                 return 0;
 107
 108         if (data[IFLA_BOND_MODE]) {
 109                 int mode = nla_get_u8(data[IFLA_BOND_MODE]);
 110
 111                 bond_opt_initval(&newval, mode);
 112                 err = __bond_opt_set(bond, BOND_OPT_MODE, &newval);
 113                 if (err)
 114                         return err;
 115         }
 116         if (data[IFLA_BOND_ACTIVE_SLAVE]) {
 117                 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
 118                 struct net_device *slave_dev;
 119
 120                 if (ifindex == 0) {
 121                         slave_dev = NULL;
 122                 } else {
 123                         slave_dev = __dev_get_by_index(dev_net(bond_dev),
 124                                                        ifindex);
 125                         if (!slave_dev)
 126                                 return -ENODEV;
 127                 }
 128                 err = bond_option_active_slave_set(bond, slave_dev);
 129                 if (err)
 130                         return err;
 131         }
 132         if (data[IFLA_BOND_MIIMON]) {
 133                 miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
 134
 135                 err = bond_option_miimon_set(bond, miimon);
 136                 if (err)
 137                         return err;
 138         }
 139         if (data[IFLA_BOND_UPDELAY]) {
 140                 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
 141
 142                 err = bond_option_updelay_set(bond, updelay);
 143                 if (err)
 144                         return err;
 145         }
 146         if (data[IFLA_BOND_DOWNDELAY]) {
 147                 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
 148
 149                 err = bond_option_downdelay_set(bond, downdelay);
 150                 if (err)
 151                         return err;
 152         }
 153         if (data[IFLA_BOND_USE_CARRIER]) {
 154                 int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
 155
 156                 err = bond_option_use_carrier_set(bond, use_carrier);
 157                 if (err)
 158                         return err;
 159         }
 160         if (data[IFLA_BOND_ARP_INTERVAL]) {
 161                 int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
 162
 163                 if (arp_interval && miimon) {
 164                         pr_err("%s: ARP monitoring cannot be used with MII monitoring.\n",
 165                                bond->dev->name);
 166                         return -EINVAL;
 167                 }
 168
 169                 err = bond_option_arp_interval_set(bond, arp_interval);
 170                 if (err)
 171                         return err;
 172         }
 173         if (data[IFLA_BOND_ARP_IP_TARGET]) {
 174                 __be32 targets[BOND_MAX_ARP_TARGETS] = { 0, };
 175                 struct nlattr *attr;
 176                 int i = 0, rem;
 177
 178                 nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
 179                         __be32 target = nla_get_be32(attr);
 180                         targets[i++] = target;
 181                 }
 182
 183                 err = bond_option_arp_ip_targets_set(bond, targets, i);
 184                 if (err)
 185                         return err;
 186         }
 187         if (data[IFLA_BOND_ARP_VALIDATE]) {
 188                 int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
 189
 190                 if (arp_validate && miimon) {
 191                         pr_err("%s: ARP validating cannot be used with MII monitoring.\n",
 192                                bond->dev->name);
 193                         return -EINVAL;
 194                 }
 195
 196                 bond_opt_initval(&newval, arp_validate);
 197                 err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval);
 198                 if (err)
 199                         return err;
 200         }
 201         if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
 202                 int arp_all_targets =
 203                         nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
 204
 205                 err = bond_option_arp_all_targets_set(bond, arp_all_targets);
 206                 if (err)
 207                         return err;
 208         }
 209         if (data[IFLA_BOND_PRIMARY]) {
 210                 int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
 211                 struct net_device *dev;
 212                 char *primary = "";
 213
 214                 dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
 215                 if (dev)
 216                         primary = dev->name;
 217
 218                 err = bond_option_primary_set(bond, primary);
 219                 if (err)
 220                         return err;
 221         }
 222         if (data[IFLA_BOND_PRIMARY_RESELECT]) {
 223                 int primary_reselect =
 224                         nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
 225
 226                 err = bond_option_primary_reselect_set(bond, primary_reselect);
 227                 if (err)
 228                         return err;
 229         }
 230         if (data[IFLA_BOND_FAIL_OVER_MAC]) {
 231                 int fail_over_mac =
 232                         nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
 233
 234                 err = bond_option_fail_over_mac_set(bond, fail_over_mac);
 235                 if (err)
 236                         return err;
 237         }
 238         if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
 239                 int xmit_hash_policy =
 240                         nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
 241
 242                 bond_opt_initval(&newval, xmit_hash_policy);
 243                 err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval);
 244                 if (err)
 245                         return err;
 246         }
 247         if (data[IFLA_BOND_RESEND_IGMP]) {
 248                 int resend_igmp =
 249                         nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
 250
 251                 err = bond_option_resend_igmp_set(bond, resend_igmp);
 252                 if (err)
 253                         return err;
 254         }
 255         if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
 256                 int num_peer_notif =
 257                         nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
 258
 259                 err = bond_option_num_peer_notif_set(bond, num_peer_notif);
 260                 if (err)
 261                         return err;
 262         }
 263         if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
 264                 int all_slaves_active =
 265                         nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
 266
 267                 err = bond_option_all_slaves_active_set(bond,
 268                                                         all_slaves_active);
 269                 if (err)
 270                         return err;
 271         }
 272         if (data[IFLA_BOND_MIN_LINKS]) {
 273                 int min_links =
 274                         nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
 275
 276                 err = bond_option_min_links_set(bond, min_links);
 277                 if (err)
 278                         return err;
 279         }
 280         if (data[IFLA_BOND_LP_INTERVAL]) {
 281                 int lp_interval =
 282                         nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
 283
 284                 err = bond_option_lp_interval_set(bond, lp_interval);
 285                 if (err)
 286                         return err;
 287         }
 288         if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
 289                 int packets_per_slave =
 290                         nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
 291
 292                 bond_opt_initval(&newval, packets_per_slave);
 293                 err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval);
 294                 if (err)
 295                         return err;
 296         }
 297         if (data[IFLA_BOND_AD_LACP_RATE]) {
 298                 int lacp_rate =
 299                         nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
 300
 301                 err = bond_option_lacp_rate_set(bond, lacp_rate);
 302                 if (err)
 303                         return err;
 304         }
 305         if (data[IFLA_BOND_AD_SELECT]) {
 306                 int ad_select =
 307                         nla_get_u8(data[IFLA_BOND_AD_SELECT]);
 308
 309                 err = bond_option_ad_select_set(bond, ad_select);
 310                 if (err)
 311                         return err;
 312         }
 313         return 0;
 314 }
 315
 316 static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
 317                         struct nlattr *tb[], struct nlattr *data[])
 318 {
 319         int err;
 320
 321         err = bond_changelink(bond_dev, tb, data);
 322         if (err < 0)
 323                 return err;
 324
 325         return register_netdevice(bond_dev);
 326 }
 327
 328 static size_t bond_get_size(const struct net_device *bond_dev)
 329 {
 330         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_MODE */
 331                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ACTIVE_SLAVE */
 332                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIIMON */
 333                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_UPDELAY */
 334                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_DOWNDELAY */
 335                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_USE_CARRIER */
 336                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_INTERVAL */
 337                                                 /* IFLA_BOND_ARP_IP_TARGET */
 338                 nla_total_size(sizeof(struct nlattr)) +
 339                 nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
 340                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_VALIDATE */
 341                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_ALL_TARGETS */
 342                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PRIMARY */
 343                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_PRIMARY_RESELECT */
 344                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_FAIL_OVER_MAC */
 345                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_XMIT_HASH_POLICY */
 346                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_RESEND_IGMP */
 347                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_NUM_PEER_NOTIF */
 348                 nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
 349                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIN_LINKS */
 350                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_LP_INTERVAL */
 351                 nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
 352                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_RATE */
 353                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_SELECT */
 354                 nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
 355                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
 356                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
 357                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
 358                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
 359                 nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
 360                 0;
 361 }
 362
 363 static int bond_fill_info(struct sk_buff *skb,
 364                           const struct net_device *bond_dev)
 365 {
 366         struct bonding *bond = netdev_priv(bond_dev);
 367         struct net_device *slave_dev = bond_option_active_slave_get(bond);
 368         struct nlattr *targets;
 369         unsigned int packets_per_slave;
 370         int i, targets_added;
 371
 372         if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode))
 373                 goto nla_put_failure;
 374
 375         if (slave_dev &&
 376             nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, slave_dev->ifindex))
 377                 goto nla_put_failure;
 378
 379         if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
 380                 goto nla_put_failure;
 381
 382         if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
 383                         bond->params.updelay * bond->params.miimon))
 384                 goto nla_put_failure;
 385
 386         if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
 387                         bond->params.downdelay * bond->params.miimon))
 388                 goto nla_put_failure;
 389
 390         if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
 391                 goto nla_put_failure;
 392
 393         if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
 394                 goto nla_put_failure;
 395
 396         targets = nla_nest_start(skb, IFLA_BOND_ARP_IP_TARGET);
 397         if (!targets)
 398                 goto nla_put_failure;
 399
 400         targets_added = 0;
 401         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 402                 if (bond->params.arp_targets[i]) {
 403                         nla_put_be32(skb, i, bond->params.arp_targets[i]);
 404                         targets_added = 1;
 405                 }
 406         }
 407
 408         if (targets_added)
 409                 nla_nest_end(skb, targets);
 410         else
 411                 nla_nest_cancel(skb, targets);
 412
 413         if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
 414                 goto nla_put_failure;
 415
 416         if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
 417                         bond->params.arp_all_targets))
 418                 goto nla_put_failure;
 419
 420         if (bond->primary_slave &&
 421             nla_put_u32(skb, IFLA_BOND_PRIMARY,
 422                         bond->primary_slave->dev->ifindex))
 423                 goto nla_put_failure;
 424
 425         if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
 426                        bond->params.primary_reselect))
 427                 goto nla_put_failure;
 428
 429         if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
 430                        bond->params.fail_over_mac))
 431                 goto nla_put_failure;
 432
 433         if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
 434                        bond->params.xmit_policy))
 435                 goto nla_put_failure;
 436
 437         if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
 438                         bond->params.resend_igmp))
 439                 goto nla_put_failure;
 440
 441         if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
 442                        bond->params.num_peer_notif))
 443                 goto nla_put_failure;
 444
 445         if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
 446                        bond->params.all_slaves_active))
 447                 goto nla_put_failure;
 448
 449         if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
 450                         bond->params.min_links))
 451                 goto nla_put_failure;
 452
 453         if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
 454                         bond->params.lp_interval))
 455                 goto nla_put_failure;
 456
 457         packets_per_slave = bond->params.packets_per_slave;
 458         if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
 459                         packets_per_slave))
 460                 goto nla_put_failure;
 461
 462         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
 463                        bond->params.lacp_fast))
 464                 goto nla_put_failure;
 465
 466         if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
 467                        bond->params.ad_select))
 468                 goto nla_put_failure;
 469
 470         if (bond->params.mode == BOND_MODE_8023AD) {
 471                 struct ad_info info;
 472
 473                 if (!bond_3ad_get_active_agg_info(bond, &info)) {
 474                         struct nlattr *nest;
 475
 476                         nest = nla_nest_start(skb, IFLA_BOND_AD_INFO);
 477                         if (!nest)
 478                                 goto nla_put_failure;
 479
 480                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
 481                                         info.aggregator_id))
 482                                 goto nla_put_failure;
 483                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
 484                                         info.ports))
 485                                 goto nla_put_failure;
 486                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
 487                                         info.actor_key))
 488                                 goto nla_put_failure;
 489                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
 490                                         info.partner_key))
 491                                 goto nla_put_failure;
 492                         if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
 493                                     sizeof(info.partner_system),
 494                                     &info.partner_system))
 495                                 goto nla_put_failure;
 496
 497                         nla_nest_end(skb, nest);
 498                 }
 499         }
 500
 501         return 0;
 502
 503 nla_put_failure:
 504         return -EMSGSIZE;
 505 }
 506
 507 struct rtnl_link_ops bond_link_ops __read_mostly = {
 508         .kind                   = "bond",
 509         .priv_size              = sizeof(struct bonding),
 510         .setup                  = bond_setup,
 511         .maxtype                = IFLA_BOND_MAX,
 512         .policy                 = bond_policy,
 513         .validate               = bond_validate,
 514         .newlink                = bond_newlink,
 515         .changelink             = bond_changelink,
 516         .get_size               = bond_get_size,
 517         .fill_info              = bond_fill_info,
 518         .get_num_tx_queues      = bond_get_num_tx_queues,
 519         .get_num_rx_queues      = bond_get_num_tx_queues, /* Use the same number
 520                                                              as for TX queues */
 521 };
 522
 523 int __init bond_netlink_init(void)
 524 {
 525         return rtnl_link_register(&bond_link_ops);
 526 }
 527
 528 void bond_netlink_fini(void)
 529 {
 530         rtnl_link_unregister(&bond_link_ops);
 531 }
 532
 533 MODULE_ALIAS_RTNL_LINK("bond");