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         int miimon = 0;
 102         int err;
 103
 104         if (!data)
 105                 return 0;
 106
 107         if (data[IFLA_BOND_MODE]) {
 108                 int mode = nla_get_u8(data[IFLA_BOND_MODE]);
 109
 110                 err = bond_option_mode_set(bond, mode);
 111                 if (err)
 112                         return err;
 113         }
 114         if (data[IFLA_BOND_ACTIVE_SLAVE]) {
 115                 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
 116                 struct net_device *slave_dev;
 117
 118                 if (ifindex == 0) {
 119                         slave_dev = NULL;
 120                 } else {
 121                         slave_dev = __dev_get_by_index(dev_net(bond_dev),
 122                                                        ifindex);
 123                         if (!slave_dev)
 124                                 return -ENODEV;
 125                 }
 126                 err = bond_option_active_slave_set(bond, slave_dev);
 127                 if (err)
 128                         return err;
 129         }
 130         if (data[IFLA_BOND_MIIMON]) {
 131                 miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
 132
 133                 err = bond_option_miimon_set(bond, miimon);
 134                 if (err)
 135                         return err;
 136         }
 137         if (data[IFLA_BOND_UPDELAY]) {
 138                 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
 139
 140                 err = bond_option_updelay_set(bond, updelay);
 141                 if (err)
 142                         return err;
 143         }
 144         if (data[IFLA_BOND_DOWNDELAY]) {
 145                 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
 146
 147                 err = bond_option_downdelay_set(bond, downdelay);
 148                 if (err)
 149                         return err;
 150         }
 151         if (data[IFLA_BOND_USE_CARRIER]) {
 152                 int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
 153
 154                 err = bond_option_use_carrier_set(bond, use_carrier);
 155                 if (err)
 156                         return err;
 157         }
 158         if (data[IFLA_BOND_ARP_INTERVAL]) {
 159                 int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
 160
 161                 if (arp_interval && miimon) {
 162                         pr_err("%s: ARP monitoring cannot be used with MII monitoring.\n",
 163                                bond->dev->name);
 164                         return -EINVAL;
 165                 }
 166
 167                 err = bond_option_arp_interval_set(bond, arp_interval);
 168                 if (err)
 169                         return err;
 170         }
 171         if (data[IFLA_BOND_ARP_IP_TARGET]) {
 172                 __be32 targets[BOND_MAX_ARP_TARGETS] = { 0, };
 173                 struct nlattr *attr;
 174                 int i = 0, rem;
 175
 176                 nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
 177                         __be32 target = nla_get_be32(attr);
 178                         targets[i++] = target;
 179                 }
 180
 181                 err = bond_option_arp_ip_targets_set(bond, targets, i);
 182                 if (err)
 183                         return err;
 184         }
 185         if (data[IFLA_BOND_ARP_VALIDATE]) {
 186                 int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
 187
 188                 if (arp_validate && miimon) {
 189                         pr_err("%s: ARP validating cannot be used with MII monitoring.\n",
 190                                bond->dev->name);
 191                         return -EINVAL;
 192                 }
 193
 194                 err = bond_option_arp_validate_set(bond, arp_validate);
 195                 if (err)
 196                         return err;
 197         }
 198         if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
 199                 int arp_all_targets =
 200                         nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
 201
 202                 err = bond_option_arp_all_targets_set(bond, arp_all_targets);
 203                 if (err)
 204                         return err;
 205         }
 206         if (data[IFLA_BOND_PRIMARY]) {
 207                 int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
 208                 struct net_device *dev;
 209                 char *primary = "";
 210
 211                 dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
 212                 if (dev)
 213                         primary = dev->name;
 214
 215                 err = bond_option_primary_set(bond, primary);
 216                 if (err)
 217                         return err;
 218         }
 219         if (data[IFLA_BOND_PRIMARY_RESELECT]) {
 220                 int primary_reselect =
 221                         nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
 222
 223                 err = bond_option_primary_reselect_set(bond, primary_reselect);
 224                 if (err)
 225                         return err;
 226         }
 227         if (data[IFLA_BOND_FAIL_OVER_MAC]) {
 228                 int fail_over_mac =
 229                         nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
 230
 231                 err = bond_option_fail_over_mac_set(bond, fail_over_mac);
 232                 if (err)
 233                         return err;
 234         }
 235         if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
 236                 int xmit_hash_policy =
 237                         nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
 238
 239                 err = bond_option_xmit_hash_policy_set(bond, xmit_hash_policy);
 240                 if (err)
 241                         return err;
 242         }
 243         if (data[IFLA_BOND_RESEND_IGMP]) {
 244                 int resend_igmp =
 245                         nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
 246
 247                 err = bond_option_resend_igmp_set(bond, resend_igmp);
 248                 if (err)
 249                         return err;
 250         }
 251         if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
 252                 int num_peer_notif =
 253                         nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
 254
 255                 err = bond_option_num_peer_notif_set(bond, num_peer_notif);
 256                 if (err)
 257                         return err;
 258         }
 259         if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
 260                 int all_slaves_active =
 261                         nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
 262
 263                 err = bond_option_all_slaves_active_set(bond,
 264                                                         all_slaves_active);
 265                 if (err)
 266                         return err;
 267         }
 268         if (data[IFLA_BOND_MIN_LINKS]) {
 269                 int min_links =
 270                         nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
 271
 272                 err = bond_option_min_links_set(bond, min_links);
 273                 if (err)
 274                         return err;
 275         }
 276         if (data[IFLA_BOND_LP_INTERVAL]) {
 277                 int lp_interval =
 278                         nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
 279
 280                 err = bond_option_lp_interval_set(bond, lp_interval);
 281                 if (err)
 282                         return err;
 283         }
 284         if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
 285                 int packets_per_slave =
 286                         nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
 287
 288                 err = bond_option_packets_per_slave_set(bond,
 289                                                         packets_per_slave);
 290                 if (err)
 291                         return err;
 292         }
 293         if (data[IFLA_BOND_AD_LACP_RATE]) {
 294                 int lacp_rate =
 295                         nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
 296
 297                 err = bond_option_lacp_rate_set(bond, lacp_rate);
 298                 if (err)
 299                         return err;
 300         }
 301         if (data[IFLA_BOND_AD_SELECT]) {
 302                 int ad_select =
 303                         nla_get_u8(data[IFLA_BOND_AD_SELECT]);
 304
 305                 err = bond_option_ad_select_set(bond, ad_select);
 306                 if (err)
 307                         return err;
 308         }
 309         return 0;
 310 }
 311
 312 static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
 313                         struct nlattr *tb[], struct nlattr *data[])
 314 {
 315         int err;
 316
 317         err = bond_changelink(bond_dev, tb, data);
 318         if (err < 0)
 319                 return err;
 320
 321         return register_netdevice(bond_dev);
 322 }
 323
 324 static size_t bond_get_size(const struct net_device *bond_dev)
 325 {
 326         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_MODE */
 327                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ACTIVE_SLAVE */
 328                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIIMON */
 329                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_UPDELAY */
 330                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_DOWNDELAY */
 331                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_USE_CARRIER */
 332                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_INTERVAL */
 333                                                 /* IFLA_BOND_ARP_IP_TARGET */
 334                 nla_total_size(sizeof(struct nlattr)) +
 335                 nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
 336                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_VALIDATE */
 337                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_ALL_TARGETS */
 338                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PRIMARY */
 339                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_PRIMARY_RESELECT */
 340                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_FAIL_OVER_MAC */
 341                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_XMIT_HASH_POLICY */
 342                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_RESEND_IGMP */
 343                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_NUM_PEER_NOTIF */
 344                 nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
 345                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIN_LINKS */
 346                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_LP_INTERVAL */
 347                 nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
 348                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_RATE */
 349                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_SELECT */
 350                 nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
 351                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
 352                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
 353                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
 354                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
 355                 nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
 356                 0;
 357 }
 358
 359 static int bond_fill_info(struct sk_buff *skb,
 360                           const struct net_device *bond_dev)
 361 {
 362         struct bonding *bond = netdev_priv(bond_dev);
 363         struct net_device *slave_dev = bond_option_active_slave_get(bond);
 364         struct nlattr *targets;
 365         unsigned int packets_per_slave;
 366         int i, targets_added;
 367
 368         if (nla_put_u8(skb, IFLA_BOND_MODE, bond->params.mode))
 369                 goto nla_put_failure;
 370
 371         if (slave_dev &&
 372             nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, slave_dev->ifindex))
 373                 goto nla_put_failure;
 374
 375         if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
 376                 goto nla_put_failure;
 377
 378         if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
 379                         bond->params.updelay * bond->params.miimon))
 380                 goto nla_put_failure;
 381
 382         if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
 383                         bond->params.downdelay * bond->params.miimon))
 384                 goto nla_put_failure;
 385
 386         if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
 387                 goto nla_put_failure;
 388
 389         if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
 390                 goto nla_put_failure;
 391
 392         targets = nla_nest_start(skb, IFLA_BOND_ARP_IP_TARGET);
 393         if (!targets)
 394                 goto nla_put_failure;
 395
 396         targets_added = 0;
 397         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 398                 if (bond->params.arp_targets[i]) {
 399                         nla_put_be32(skb, i, bond->params.arp_targets[i]);
 400                         targets_added = 1;
 401                 }
 402         }
 403
 404         if (targets_added)
 405                 nla_nest_end(skb, targets);
 406         else
 407                 nla_nest_cancel(skb, targets);
 408
 409         if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
 410                 goto nla_put_failure;
 411
 412         if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
 413                         bond->params.arp_all_targets))
 414                 goto nla_put_failure;
 415
 416         if (bond->primary_slave &&
 417             nla_put_u32(skb, IFLA_BOND_PRIMARY,
 418                         bond->primary_slave->dev->ifindex))
 419                 goto nla_put_failure;
 420
 421         if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
 422                        bond->params.primary_reselect))
 423                 goto nla_put_failure;
 424
 425         if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
 426                        bond->params.fail_over_mac))
 427                 goto nla_put_failure;
 428
 429         if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
 430                        bond->params.xmit_policy))
 431                 goto nla_put_failure;
 432
 433         if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
 434                         bond->params.resend_igmp))
 435                 goto nla_put_failure;
 436
 437         if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
 438                        bond->params.num_peer_notif))
 439                 goto nla_put_failure;
 440
 441         if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
 442                        bond->params.all_slaves_active))
 443                 goto nla_put_failure;
 444
 445         if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
 446                         bond->params.min_links))
 447                 goto nla_put_failure;
 448
 449         if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
 450                         bond->params.lp_interval))
 451                 goto nla_put_failure;
 452
 453         packets_per_slave = bond->params.packets_per_slave;
 454         if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
 455                         packets_per_slave))
 456                 goto nla_put_failure;
 457
 458         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
 459                        bond->params.lacp_fast))
 460                 goto nla_put_failure;
 461
 462         if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
 463                        bond->params.ad_select))
 464                 goto nla_put_failure;
 465
 466         if (bond->params.mode == BOND_MODE_8023AD) {
 467                 struct ad_info info;
 468
 469                 if (!bond_3ad_get_active_agg_info(bond, &info)) {
 470                         struct nlattr *nest;
 471
 472                         nest = nla_nest_start(skb, IFLA_BOND_AD_INFO);
 473                         if (!nest)
 474                                 goto nla_put_failure;
 475
 476                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
 477                                         info.aggregator_id))
 478                                 goto nla_put_failure;
 479                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
 480                                         info.ports))
 481                                 goto nla_put_failure;
 482                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
 483                                         info.actor_key))
 484                                 goto nla_put_failure;
 485                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
 486                                         info.partner_key))
 487                                 goto nla_put_failure;
 488                         if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
 489                                     sizeof(info.partner_system),
 490                                     &info.partner_system))
 491                                 goto nla_put_failure;
 492
 493                         nla_nest_end(skb, nest);
 494                 }
 495         }
 496
 497         return 0;
 498
 499 nla_put_failure:
 500         return -EMSGSIZE;
 501 }
 502
 503 struct rtnl_link_ops bond_link_ops __read_mostly = {
 504         .kind                   = "bond",
 505         .priv_size              = sizeof(struct bonding),
 506         .setup                  = bond_setup,
 507         .maxtype                = IFLA_BOND_MAX,
 508         .policy                 = bond_policy,
 509         .validate               = bond_validate,
 510         .newlink                = bond_newlink,
 511         .changelink             = bond_changelink,
 512         .get_size               = bond_get_size,
 513         .fill_info              = bond_fill_info,
 514         .get_num_tx_queues      = bond_get_num_tx_queues,
 515         .get_num_rx_queues      = bond_get_num_tx_queues, /* Use the same number
 516                                                              as for TX queues */
 517 };
 518
 519 int __init bond_netlink_init(void)
 520 {
 521         return rtnl_link_register(&bond_link_ops);
 522 }
 523
 524 void bond_netlink_fini(void)
 525 {
 526         rtnl_link_unregister(&bond_link_ops);
 527 }
 528
 529 MODULE_ALIAS_RTNL_LINK("bond");