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 #include <linux/module.h>
  13 #include <linux/errno.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/if_link.h>
  17 #include <linux/if_ether.h>
  18 #include <net/netlink.h>
  19 #include <net/rtnetlink.h>
  20 #include <net/bonding.h>
  21
  22 static size_t bond_get_slave_size(const struct net_device *bond_dev,
  23                                   const struct net_device *slave_dev)
  24 {
  25         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_SLAVE_STATE */
  26                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_SLAVE_MII_STATUS */
  27                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
  28                 nla_total_size(MAX_ADDR_LEN) +  /* IFLA_BOND_SLAVE_PERM_HWADDR */
  29                 nla_total_size(sizeof(u16)) +   /* IFLA_BOND_SLAVE_QUEUE_ID */
  30                 nla_total_size(sizeof(u16)) +   /* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
  31                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
  32                 nla_total_size(sizeof(u16)) +   /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
  33                 0;
  34 }
  35
  36 static int bond_fill_slave_info(struct sk_buff *skb,
  37                                 const struct net_device *bond_dev,
  38                                 const struct net_device *slave_dev)
  39 {
  40         struct slave *slave = bond_slave_get_rtnl(slave_dev);
  41
  42         if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
  43                 goto nla_put_failure;
  44
  45         if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
  46                 goto nla_put_failure;
  47
  48         if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
  49                         slave->link_failure_count))
  50                 goto nla_put_failure;
  51
  52         if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
  53                     slave_dev->addr_len, slave->perm_hwaddr))
  54                 goto nla_put_failure;
  55
  56         if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
  57                 goto nla_put_failure;
  58
  59         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  60                 const struct aggregator *agg;
  61                 const struct port *ad_port;
  62
  63                 ad_port = &SLAVE_AD_INFO(slave)->port;
  64                 agg = SLAVE_AD_INFO(slave)->port.aggregator;
  65                 if (agg) {
  66                         if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
  67                                         agg->aggregator_identifier))
  68                                 goto nla_put_failure;
  69                         if (nla_put_u8(skb,
  70                                        IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
  71                                        ad_port->actor_oper_port_state))
  72                                 goto nla_put_failure;
  73                         if (nla_put_u16(skb,
  74                                         IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
  75                                         ad_port->partner_oper.port_state))
  76                                 goto nla_put_failure;
  77                 }
  78         }
  79
  80         return 0;
  81
  82 nla_put_failure:
  83         return -EMSGSIZE;
  84 }
  85
  86 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
  87         [IFLA_BOND_MODE]                = { .type = NLA_U8 },
  88         [IFLA_BOND_ACTIVE_SLAVE]        = { .type = NLA_U32 },
  89         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  90         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  91         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
  92         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
  93         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
  94         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
  95         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
  96         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
  97         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
  98         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
  99         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
 100         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
 101         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
 102         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
 103         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
 104         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
 105         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
 106         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
 107         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
 108         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
 109         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
 110         [IFLA_BOND_AD_ACTOR_SYS_PRIO]   = { .type = NLA_U16 },
 111         [IFLA_BOND_AD_USER_PORT_KEY]    = { .type = NLA_U16 },
 112         [IFLA_BOND_AD_ACTOR_SYSTEM]     = { .type = NLA_BINARY,
 113                                             .len  = ETH_ALEN },
 114         [IFLA_BOND_TLB_DYNAMIC_LB]      = { .type = NLA_U8 },
 115 };
 116
 117 static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
 118         [IFLA_BOND_SLAVE_QUEUE_ID]      = { .type = NLA_U16 },
 119 };
 120
 121 static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
 122                          struct netlink_ext_ack *extack)
 123 {
 124         if (tb[IFLA_ADDRESS]) {
 125                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 126                         return -EINVAL;
 127                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 128                         return -EADDRNOTAVAIL;
 129         }
 130         return 0;
 131 }
 132
 133 static int bond_slave_changelink(struct net_device *bond_dev,
 134                                  struct net_device *slave_dev,
 135                                  struct nlattr *tb[], struct nlattr *data[],
 136                                  struct netlink_ext_ack *extack)
 137 {
 138         struct bonding *bond = netdev_priv(bond_dev);
 139         struct bond_opt_value newval;
 140         int err;
 141
 142         if (!data)
 143                 return 0;
 144
 145         if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
 146                 u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
 147                 char queue_id_str[IFNAMSIZ + 7];
 148
 149                 /* queue_id option setting expects slave_name:queue_id */
 150                 snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
 151                          slave_dev->name, queue_id);
 152                 bond_opt_initstr(&newval, queue_id_str);
 153                 err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval);
 154                 if (err)
 155                         return err;
 156         }
 157
 158         return 0;
 159 }
 160
 161 static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
 162                            struct nlattr *data[],
 163                            struct netlink_ext_ack *extack)
 164 {
 165         struct bonding *bond = netdev_priv(bond_dev);
 166         struct bond_opt_value newval;
 167         int miimon = 0;
 168         int err;
 169
 170         if (!data)
 171                 return 0;
 172
 173         if (data[IFLA_BOND_MODE]) {
 174                 int mode = nla_get_u8(data[IFLA_BOND_MODE]);
 175
 176                 bond_opt_initval(&newval, mode);
 177                 err = __bond_opt_set(bond, BOND_OPT_MODE, &newval);
 178                 if (err)
 179                         return err;
 180         }
 181         if (data[IFLA_BOND_ACTIVE_SLAVE]) {
 182                 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
 183                 struct net_device *slave_dev;
 184                 char *active_slave = "";
 185
 186                 if (ifindex != 0) {
 187                         slave_dev = __dev_get_by_index(dev_net(bond_dev),
 188                                                        ifindex);
 189                         if (!slave_dev)
 190                                 return -ENODEV;
 191                         active_slave = slave_dev->name;
 192                 }
 193                 bond_opt_initstr(&newval, active_slave);
 194                 err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval);
 195                 if (err)
 196                         return err;
 197         }
 198         if (data[IFLA_BOND_MIIMON]) {
 199                 miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
 200
 201                 bond_opt_initval(&newval, miimon);
 202                 err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval);
 203                 if (err)
 204                         return err;
 205         }
 206         if (data[IFLA_BOND_UPDELAY]) {
 207                 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
 208
 209                 bond_opt_initval(&newval, updelay);
 210                 err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval);
 211                 if (err)
 212                         return err;
 213         }
 214         if (data[IFLA_BOND_DOWNDELAY]) {
 215                 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
 216
 217                 bond_opt_initval(&newval, downdelay);
 218                 err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval);
 219                 if (err)
 220                         return err;
 221         }
 222         if (data[IFLA_BOND_USE_CARRIER]) {
 223                 int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
 224
 225                 bond_opt_initval(&newval, use_carrier);
 226                 err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval);
 227                 if (err)
 228                         return err;
 229         }
 230         if (data[IFLA_BOND_ARP_INTERVAL]) {
 231                 int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
 232
 233                 if (arp_interval && miimon) {
 234                         netdev_err(bond->dev, "ARP monitoring cannot be used with MII monitoring\n");
 235                         return -EINVAL;
 236                 }
 237
 238                 bond_opt_initval(&newval, arp_interval);
 239                 err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval);
 240                 if (err)
 241                         return err;
 242         }
 243         if (data[IFLA_BOND_ARP_IP_TARGET]) {
 244                 struct nlattr *attr;
 245                 int i = 0, rem;
 246
 247                 bond_option_arp_ip_targets_clear(bond);
 248                 nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
 249                         __be32 target;
 250
 251                         if (nla_len(attr) < sizeof(target))
 252                                 return -EINVAL;
 253
 254                         target = nla_get_be32(attr);
 255
 256                         bond_opt_initval(&newval, (__force u64)target);
 257                         err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
 258                                              &newval);
 259                         if (err)
 260                                 break;
 261                         i++;
 262                 }
 263                 if (i == 0 && bond->params.arp_interval)
 264                         netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
 265                 if (err)
 266                         return err;
 267         }
 268         if (data[IFLA_BOND_ARP_VALIDATE]) {
 269                 int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
 270
 271                 if (arp_validate && miimon) {
 272                         netdev_err(bond->dev, "ARP validating cannot be used with MII monitoring\n");
 273                         return -EINVAL;
 274                 }
 275
 276                 bond_opt_initval(&newval, arp_validate);
 277                 err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval);
 278                 if (err)
 279                         return err;
 280         }
 281         if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
 282                 int arp_all_targets =
 283                         nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
 284
 285                 bond_opt_initval(&newval, arp_all_targets);
 286                 err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval);
 287                 if (err)
 288                         return err;
 289         }
 290         if (data[IFLA_BOND_PRIMARY]) {
 291                 int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
 292                 struct net_device *dev;
 293                 char *primary = "";
 294
 295                 dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
 296                 if (dev)
 297                         primary = dev->name;
 298
 299                 bond_opt_initstr(&newval, primary);
 300                 err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval);
 301                 if (err)
 302                         return err;
 303         }
 304         if (data[IFLA_BOND_PRIMARY_RESELECT]) {
 305                 int primary_reselect =
 306                         nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
 307
 308                 bond_opt_initval(&newval, primary_reselect);
 309                 err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval);
 310                 if (err)
 311                         return err;
 312         }
 313         if (data[IFLA_BOND_FAIL_OVER_MAC]) {
 314                 int fail_over_mac =
 315                         nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
 316
 317                 bond_opt_initval(&newval, fail_over_mac);
 318                 err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval);
 319                 if (err)
 320                         return err;
 321         }
 322         if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
 323                 int xmit_hash_policy =
 324                         nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
 325
 326                 bond_opt_initval(&newval, xmit_hash_policy);
 327                 err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval);
 328                 if (err)
 329                         return err;
 330         }
 331         if (data[IFLA_BOND_RESEND_IGMP]) {
 332                 int resend_igmp =
 333                         nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
 334
 335                 bond_opt_initval(&newval, resend_igmp);
 336                 err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval);
 337                 if (err)
 338                         return err;
 339         }
 340         if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
 341                 int num_peer_notif =
 342                         nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
 343
 344                 bond_opt_initval(&newval, num_peer_notif);
 345                 err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval);
 346                 if (err)
 347                         return err;
 348         }
 349         if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
 350                 int all_slaves_active =
 351                         nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
 352
 353                 bond_opt_initval(&newval, all_slaves_active);
 354                 err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval);
 355                 if (err)
 356                         return err;
 357         }
 358         if (data[IFLA_BOND_MIN_LINKS]) {
 359                 int min_links =
 360                         nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
 361
 362                 bond_opt_initval(&newval, min_links);
 363                 err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval);
 364                 if (err)
 365                         return err;
 366         }
 367         if (data[IFLA_BOND_LP_INTERVAL]) {
 368                 int lp_interval =
 369                         nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
 370
 371                 bond_opt_initval(&newval, lp_interval);
 372                 err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval);
 373                 if (err)
 374                         return err;
 375         }
 376         if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
 377                 int packets_per_slave =
 378                         nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
 379
 380                 bond_opt_initval(&newval, packets_per_slave);
 381                 err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval);
 382                 if (err)
 383                         return err;
 384         }
 385         if (data[IFLA_BOND_AD_LACP_RATE]) {
 386                 int lacp_rate =
 387                         nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
 388
 389                 bond_opt_initval(&newval, lacp_rate);
 390                 err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval);
 391                 if (err)
 392                         return err;
 393         }
 394         if (data[IFLA_BOND_AD_SELECT]) {
 395                 int ad_select =
 396                         nla_get_u8(data[IFLA_BOND_AD_SELECT]);
 397
 398                 bond_opt_initval(&newval, ad_select);
 399                 err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval);
 400                 if (err)
 401                         return err;
 402         }
 403         if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
 404                 int actor_sys_prio =
 405                         nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
 406
 407                 bond_opt_initval(&newval, actor_sys_prio);
 408                 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval);
 409                 if (err)
 410                         return err;
 411         }
 412         if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
 413                 int port_key =
 414                         nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
 415
 416                 bond_opt_initval(&newval, port_key);
 417                 err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval);
 418                 if (err)
 419                         return err;
 420         }
 421         if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
 422                 if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
 423                         return -EINVAL;
 424
 425                 bond_opt_initval(&newval,
 426                                  nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
 427                 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval);
 428                 if (err)
 429                         return err;
 430         }
 431         if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
 432                 int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
 433
 434                 bond_opt_initval(&newval, dynamic_lb);
 435                 err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval);
 436                 if (err)
 437                         return err;
 438         }
 439
 440         return 0;
 441 }
 442
 443 static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
 444                         struct nlattr *tb[], struct nlattr *data[],
 445                         struct netlink_ext_ack *extack)
 446 {
 447         int err;
 448
 449         err = bond_changelink(bond_dev, tb, data, extack);
 450         if (err < 0)
 451                 return err;
 452
 453         err = register_netdevice(bond_dev);
 454
 455         netif_carrier_off(bond_dev);
 456         if (!err) {
 457                 struct bonding *bond = netdev_priv(bond_dev);
 458
 459                 bond_work_init_all(bond);
 460         }
 461
 462         return err;
 463 }
 464
 465 static size_t bond_get_size(const struct net_device *bond_dev)
 466 {
 467         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_MODE */
 468                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ACTIVE_SLAVE */
 469                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIIMON */
 470                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_UPDELAY */
 471                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_DOWNDELAY */
 472                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_USE_CARRIER */
 473                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_INTERVAL */
 474                                                 /* IFLA_BOND_ARP_IP_TARGET */
 475                 nla_total_size(sizeof(struct nlattr)) +
 476                 nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
 477                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_VALIDATE */
 478                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_ALL_TARGETS */
 479                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PRIMARY */
 480                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_PRIMARY_RESELECT */
 481                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_FAIL_OVER_MAC */
 482                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_XMIT_HASH_POLICY */
 483                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_RESEND_IGMP */
 484                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_NUM_PEER_NOTIF */
 485                 nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
 486                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIN_LINKS */
 487                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_LP_INTERVAL */
 488                 nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
 489                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_RATE */
 490                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_SELECT */
 491                 nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
 492                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
 493                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
 494                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
 495                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
 496                 nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
 497                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
 498                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
 499                 nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
 500                 nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
 501                 0;
 502 }
 503
 504 static int bond_option_active_slave_get_ifindex(struct bonding *bond)
 505 {
 506         const struct net_device *slave;
 507         int ifindex;
 508
 509         rcu_read_lock();
 510         slave = bond_option_active_slave_get_rcu(bond);
 511         ifindex = slave ? slave->ifindex : 0;
 512         rcu_read_unlock();
 513         return ifindex;
 514 }
 515
 516 static int bond_fill_info(struct sk_buff *skb,
 517                           const struct net_device *bond_dev)
 518 {
 519         struct bonding *bond = netdev_priv(bond_dev);
 520         unsigned int packets_per_slave;
 521         int ifindex, i, targets_added;
 522         struct nlattr *targets;
 523         struct slave *primary;
 524
 525         if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
 526                 goto nla_put_failure;
 527
 528         ifindex = bond_option_active_slave_get_ifindex(bond);
 529         if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
 530                 goto nla_put_failure;
 531
 532         if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
 533                 goto nla_put_failure;
 534
 535         if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
 536                         bond->params.updelay * bond->params.miimon))
 537                 goto nla_put_failure;
 538
 539         if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
 540                         bond->params.downdelay * bond->params.miimon))
 541                 goto nla_put_failure;
 542
 543         if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
 544                 goto nla_put_failure;
 545
 546         if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
 547                 goto nla_put_failure;
 548
 549         targets = nla_nest_start(skb, IFLA_BOND_ARP_IP_TARGET);
 550         if (!targets)
 551                 goto nla_put_failure;
 552
 553         targets_added = 0;
 554         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 555                 if (bond->params.arp_targets[i]) {
 556                         if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
 557                                 goto nla_put_failure;
 558                         targets_added = 1;
 559                 }
 560         }
 561
 562         if (targets_added)
 563                 nla_nest_end(skb, targets);
 564         else
 565                 nla_nest_cancel(skb, targets);
 566
 567         if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
 568                 goto nla_put_failure;
 569
 570         if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
 571                         bond->params.arp_all_targets))
 572                 goto nla_put_failure;
 573
 574         primary = rtnl_dereference(bond->primary_slave);
 575         if (primary &&
 576             nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
 577                 goto nla_put_failure;
 578
 579         if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
 580                        bond->params.primary_reselect))
 581                 goto nla_put_failure;
 582
 583         if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
 584                        bond->params.fail_over_mac))
 585                 goto nla_put_failure;
 586
 587         if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
 588                        bond->params.xmit_policy))
 589                 goto nla_put_failure;
 590
 591         if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
 592                         bond->params.resend_igmp))
 593                 goto nla_put_failure;
 594
 595         if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
 596                        bond->params.num_peer_notif))
 597                 goto nla_put_failure;
 598
 599         if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
 600                        bond->params.all_slaves_active))
 601                 goto nla_put_failure;
 602
 603         if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
 604                         bond->params.min_links))
 605                 goto nla_put_failure;
 606
 607         if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
 608                         bond->params.lp_interval))
 609                 goto nla_put_failure;
 610
 611         packets_per_slave = bond->params.packets_per_slave;
 612         if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
 613                         packets_per_slave))
 614                 goto nla_put_failure;
 615
 616         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
 617                        bond->params.lacp_fast))
 618                 goto nla_put_failure;
 619
 620         if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
 621                        bond->params.ad_select))
 622                 goto nla_put_failure;
 623
 624         if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
 625                        bond->params.tlb_dynamic_lb))
 626                 goto nla_put_failure;
 627
 628         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 629                 struct ad_info info;
 630
 631                 if (capable(CAP_NET_ADMIN)) {
 632                         if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
 633                                         bond->params.ad_actor_sys_prio))
 634                                 goto nla_put_failure;
 635
 636                         if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
 637                                         bond->params.ad_user_port_key))
 638                                 goto nla_put_failure;
 639
 640                         if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
 641                                     ETH_ALEN, &bond->params.ad_actor_system))
 642                                 goto nla_put_failure;
 643                 }
 644                 if (!bond_3ad_get_active_agg_info(bond, &info)) {
 645                         struct nlattr *nest;
 646
 647                         nest = nla_nest_start(skb, IFLA_BOND_AD_INFO);
 648                         if (!nest)
 649                                 goto nla_put_failure;
 650
 651                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
 652                                         info.aggregator_id))
 653                                 goto nla_put_failure;
 654                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
 655                                         info.ports))
 656                                 goto nla_put_failure;
 657                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
 658                                         info.actor_key))
 659                                 goto nla_put_failure;
 660                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
 661                                         info.partner_key))
 662                                 goto nla_put_failure;
 663                         if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
 664                                     sizeof(info.partner_system),
 665                                     &info.partner_system))
 666                                 goto nla_put_failure;
 667
 668                         nla_nest_end(skb, nest);
 669                 }
 670         }
 671
 672         return 0;
 673
 674 nla_put_failure:
 675         return -EMSGSIZE;
 676 }
 677
 678 static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
 679 {
 680         switch (attr) {
 681         case IFLA_STATS_LINK_XSTATS:
 682         case IFLA_STATS_LINK_XSTATS_SLAVE:
 683                 break;
 684         default:
 685                 return 0;
 686         }
 687
 688         return bond_3ad_stats_size() + nla_total_size(0);
 689 }
 690
 691 static int bond_fill_linkxstats(struct sk_buff *skb,
 692                                 const struct net_device *dev,
 693                                 int *prividx, int attr)
 694 {
 695         struct nlattr *nla __maybe_unused;
 696         struct slave *slave = NULL;
 697         struct nlattr *nest, *nest2;
 698         struct bonding *bond;
 699
 700         switch (attr) {
 701         case IFLA_STATS_LINK_XSTATS:
 702                 bond = netdev_priv(dev);
 703                 break;
 704         case IFLA_STATS_LINK_XSTATS_SLAVE:
 705                 slave = bond_slave_get_rtnl(dev);
 706                 if (!slave)
 707                         return 0;
 708                 bond = slave->bond;
 709                 break;
 710         default:
 711                 return -EINVAL;
 712         }
 713
 714         nest = nla_nest_start(skb, LINK_XSTATS_TYPE_BOND);
 715         if (!nest)
 716                 return -EMSGSIZE;
 717         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 718                 struct bond_3ad_stats *stats;
 719
 720                 if (slave)
 721                         stats = &SLAVE_AD_INFO(slave)->stats;
 722                 else
 723                         stats = &BOND_AD_INFO(bond).stats;
 724
 725                 nest2 = nla_nest_start(skb, BOND_XSTATS_3AD);
 726                 if (!nest2) {
 727                         nla_nest_end(skb, nest);
 728                         return -EMSGSIZE;
 729                 }
 730
 731                 if (bond_3ad_stats_fill(skb, stats)) {
 732                         nla_nest_cancel(skb, nest2);
 733                         nla_nest_end(skb, nest);
 734                         return -EMSGSIZE;
 735                 }
 736                 nla_nest_end(skb, nest2);
 737         }
 738         nla_nest_end(skb, nest);
 739
 740         return 0;
 741 }
 742
 743 struct rtnl_link_ops bond_link_ops __read_mostly = {
 744         .kind                   = "bond",
 745         .priv_size              = sizeof(struct bonding),
 746         .setup                  = bond_setup,
 747         .maxtype                = IFLA_BOND_MAX,
 748         .policy                 = bond_policy,
 749         .validate               = bond_validate,
 750         .newlink                = bond_newlink,
 751         .changelink             = bond_changelink,
 752         .get_size               = bond_get_size,
 753         .fill_info              = bond_fill_info,
 754         .get_num_tx_queues      = bond_get_num_tx_queues,
 755         .get_num_rx_queues      = bond_get_num_tx_queues, /* Use the same number
 756                                                              as for TX queues */
 757         .fill_linkxstats        = bond_fill_linkxstats,
 758         .get_linkxstats_size    = bond_get_linkxstats_size,
 759         .slave_maxtype          = IFLA_BOND_SLAVE_MAX,
 760         .slave_policy           = bond_slave_policy,
 761         .slave_changelink       = bond_slave_changelink,
 762         .get_slave_size         = bond_get_slave_size,
 763         .fill_slave_info        = bond_fill_slave_info,
 764 };
 765
 766 int __init bond_netlink_init(void)
 767 {
 768         return rtnl_link_register(&bond_link_ops);
 769 }
 770
 771 void bond_netlink_fini(void)
 772 {
 773         rtnl_link_unregister(&bond_link_ops);
 774 }
 775
 776 MODULE_ALIAS_RTNL_LINK("bond");