bonding/bond_netlink.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * drivers/net/bond/bond_netlink.c - Netlink interface for bonding
   4  * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
   5  * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/errno.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/etherdevice.h>
  12 #include <linux/if_link.h>
  13 #include <linux/if_ether.h>
  14 #include <net/netlink.h>
  15 #include <net/rtnetlink.h>
  16 #include <net/bonding.h>
  17 #include <net/ipv6.h>
  18
  19 static size_t bond_get_slave_size(const struct net_device *bond_dev,
  20                                   const struct net_device *slave_dev)
  21 {
  22         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_SLAVE_STATE */
  23                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_SLAVE_MII_STATUS */
  24                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
  25                 nla_total_size(MAX_ADDR_LEN) +  /* IFLA_BOND_SLAVE_PERM_HWADDR */
  26                 nla_total_size(sizeof(u16)) +   /* IFLA_BOND_SLAVE_QUEUE_ID */
  27                 nla_total_size(sizeof(u16)) +   /* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
  28                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
  29                 nla_total_size(sizeof(u16)) +   /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
  30                 0;
  31 }
  32
  33 static int bond_fill_slave_info(struct sk_buff *skb,
  34                                 const struct net_device *bond_dev,
  35                                 const struct net_device *slave_dev)
  36 {
  37         struct slave *slave = bond_slave_get_rtnl(slave_dev);
  38
  39         if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
  40                 goto nla_put_failure;
  41
  42         if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
  43                 goto nla_put_failure;
  44
  45         if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
  46                         slave->link_failure_count))
  47                 goto nla_put_failure;
  48
  49         if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
  50                     slave_dev->addr_len, slave->perm_hwaddr))
  51                 goto nla_put_failure;
  52
  53         if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
  54                 goto nla_put_failure;
  55
  56         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  57                 const struct aggregator *agg;
  58                 const struct port *ad_port;
  59
  60                 ad_port = &SLAVE_AD_INFO(slave)->port;
  61                 agg = SLAVE_AD_INFO(slave)->port.aggregator;
  62                 if (agg) {
  63                         if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
  64                                         agg->aggregator_identifier))
  65                                 goto nla_put_failure;
  66                         if (nla_put_u8(skb,
  67                                        IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
  68                                        ad_port->actor_oper_port_state))
  69                                 goto nla_put_failure;
  70                         if (nla_put_u16(skb,
  71                                         IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
  72                                         ad_port->partner_oper.port_state))
  73                                 goto nla_put_failure;
  74                 }
  75         }
  76
  77         return 0;
  78
  79 nla_put_failure:
  80         return -EMSGSIZE;
  81 }
  82
  83 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
  84         [IFLA_BOND_MODE]                = { .type = NLA_U8 },
  85         [IFLA_BOND_ACTIVE_SLAVE]        = { .type = NLA_U32 },
  86         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  87         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  88         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
  89         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
  90         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
  91         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
  92         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
  93         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
  94         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
  95         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
  96         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
  97         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
  98         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
  99         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
 100         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
 101         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
 102         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
 103         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
 104         [IFLA_BOND_AD_LACP_ACTIVE]      = { .type = NLA_U8 },
 105         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
 106         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
 107         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
 108         [IFLA_BOND_AD_ACTOR_SYS_PRIO]   = { .type = NLA_U16 },
 109         [IFLA_BOND_AD_USER_PORT_KEY]    = { .type = NLA_U16 },
 110         [IFLA_BOND_AD_ACTOR_SYSTEM]     = { .type = NLA_BINARY,
 111                                             .len  = ETH_ALEN },
 112         [IFLA_BOND_TLB_DYNAMIC_LB]      = { .type = NLA_U8 },
 113         [IFLA_BOND_PEER_NOTIF_DELAY]    = { .type = NLA_U32 },
 114         [IFLA_BOND_MISSED_MAX]          = { .type = NLA_U8 },
 115         [IFLA_BOND_NS_IP6_TARGET]       = { .type = NLA_NESTED },
 116 };
 117
 118 static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
 119         [IFLA_BOND_SLAVE_QUEUE_ID]      = { .type = NLA_U16 },
 120 };
 121
 122 static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
 123                          struct netlink_ext_ack *extack)
 124 {
 125         if (tb[IFLA_ADDRESS]) {
 126                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 127                         return -EINVAL;
 128                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 129                         return -EADDRNOTAVAIL;
 130         }
 131         return 0;
 132 }
 133
 134 static int bond_slave_changelink(struct net_device *bond_dev,
 135                                  struct net_device *slave_dev,
 136                                  struct nlattr *tb[], struct nlattr *data[],
 137                                  struct netlink_ext_ack *extack)
 138 {
 139         struct bonding *bond = netdev_priv(bond_dev);
 140         struct bond_opt_value newval;
 141         int err;
 142
 143         if (!data)
 144                 return 0;
 145
 146         if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
 147                 u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
 148                 char queue_id_str[IFNAMSIZ + 7];
 149
 150                 /* queue_id option setting expects slave_name:queue_id */
 151                 snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
 152                          slave_dev->name, queue_id);
 153                 bond_opt_initstr(&newval, queue_id_str);
 154                 err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval);
 155                 if (err)
 156                         return err;
 157         }
 158
 159         return 0;
 160 }
 161
 162 static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
 163                            struct nlattr *data[],
 164                            struct netlink_ext_ack *extack)
 165 {
 166         struct bonding *bond = netdev_priv(bond_dev);
 167         struct bond_opt_value newval;
 168         int miimon = 0;
 169         int err;
 170
 171         if (!data)
 172                 return 0;
 173
 174         if (data[IFLA_BOND_MODE]) {
 175                 int mode = nla_get_u8(data[IFLA_BOND_MODE]);
 176
 177                 bond_opt_initval(&newval, mode);
 178                 err = __bond_opt_set(bond, BOND_OPT_MODE, &newval);
 179                 if (err)
 180                         return err;
 181         }
 182         if (data[IFLA_BOND_ACTIVE_SLAVE]) {
 183                 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
 184                 struct net_device *slave_dev;
 185                 char *active_slave = "";
 186
 187                 if (ifindex != 0) {
 188                         slave_dev = __dev_get_by_index(dev_net(bond_dev),
 189                                                        ifindex);
 190                         if (!slave_dev)
 191                                 return -ENODEV;
 192                         active_slave = slave_dev->name;
 193                 }
 194                 bond_opt_initstr(&newval, active_slave);
 195                 err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval);
 196                 if (err)
 197                         return err;
 198         }
 199         if (data[IFLA_BOND_MIIMON]) {
 200                 miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
 201
 202                 bond_opt_initval(&newval, miimon);
 203                 err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval);
 204                 if (err)
 205                         return err;
 206         }
 207         if (data[IFLA_BOND_UPDELAY]) {
 208                 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
 209
 210                 bond_opt_initval(&newval, updelay);
 211                 err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval);
 212                 if (err)
 213                         return err;
 214         }
 215         if (data[IFLA_BOND_DOWNDELAY]) {
 216                 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
 217
 218                 bond_opt_initval(&newval, downdelay);
 219                 err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval);
 220                 if (err)
 221                         return err;
 222         }
 223         if (data[IFLA_BOND_PEER_NOTIF_DELAY]) {
 224                 int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]);
 225
 226                 bond_opt_initval(&newval, delay);
 227                 err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval);
 228                 if (err)
 229                         return err;
 230         }
 231         if (data[IFLA_BOND_USE_CARRIER]) {
 232                 int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
 233
 234                 bond_opt_initval(&newval, use_carrier);
 235                 err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval);
 236                 if (err)
 237                         return err;
 238         }
 239         if (data[IFLA_BOND_ARP_INTERVAL]) {
 240                 int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
 241
 242                 if (arp_interval && miimon) {
 243                         netdev_err(bond->dev, "ARP monitoring cannot be used with MII monitoring\n");
 244                         return -EINVAL;
 245                 }
 246
 247                 bond_opt_initval(&newval, arp_interval);
 248                 err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval);
 249                 if (err)
 250                         return err;
 251         }
 252         if (data[IFLA_BOND_ARP_IP_TARGET]) {
 253                 struct nlattr *attr;
 254                 int i = 0, rem;
 255
 256                 bond_option_arp_ip_targets_clear(bond);
 257                 nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
 258                         __be32 target;
 259
 260                         if (nla_len(attr) < sizeof(target))
 261                                 return -EINVAL;
 262
 263                         target = nla_get_be32(attr);
 264
 265                         bond_opt_initval(&newval, (__force u64)target);
 266                         err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
 267                                              &newval);
 268                         if (err)
 269                                 break;
 270                         i++;
 271                 }
 272                 if (i == 0 && bond->params.arp_interval)
 273                         netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
 274                 if (err)
 275                         return err;
 276         }
 277 #if IS_ENABLED(CONFIG_IPV6)
 278         if (data[IFLA_BOND_NS_IP6_TARGET]) {
 279                 struct nlattr *attr;
 280                 int i = 0, rem;
 281
 282                 bond_option_ns_ip6_targets_clear(bond);
 283                 nla_for_each_nested(attr, data[IFLA_BOND_NS_IP6_TARGET], rem) {
 284                         struct in6_addr addr6;
 285
 286                         if (nla_len(attr) < sizeof(addr6)) {
 287                                 NL_SET_ERR_MSG(extack, "Invalid IPv6 address");
 288                                 return -EINVAL;
 289                         }
 290
 291                         addr6 = nla_get_in6_addr(attr);
 292
 293                         bond_opt_initextra(&newval, &addr6, sizeof(addr6));
 294                         err = __bond_opt_set(bond, BOND_OPT_NS_TARGETS,
 295                                              &newval);
 296                         if (err)
 297                                 break;
 298                         i++;
 299                 }
 300                 if (i == 0 && bond->params.arp_interval)
 301                         netdev_warn(bond->dev, "Removing last ns target with arp_interval on\n");
 302                 if (err)
 303                         return err;
 304         }
 305 #endif
 306         if (data[IFLA_BOND_ARP_VALIDATE]) {
 307                 int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
 308
 309                 if (arp_validate && miimon) {
 310                         netdev_err(bond->dev, "ARP validating cannot be used with MII monitoring\n");
 311                         return -EINVAL;
 312                 }
 313
 314                 bond_opt_initval(&newval, arp_validate);
 315                 err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval);
 316                 if (err)
 317                         return err;
 318         }
 319         if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
 320                 int arp_all_targets =
 321                         nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
 322
 323                 bond_opt_initval(&newval, arp_all_targets);
 324                 err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval);
 325                 if (err)
 326                         return err;
 327         }
 328         if (data[IFLA_BOND_PRIMARY]) {
 329                 int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
 330                 struct net_device *dev;
 331                 char *primary = "";
 332
 333                 dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
 334                 if (dev)
 335                         primary = dev->name;
 336
 337                 bond_opt_initstr(&newval, primary);
 338                 err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval);
 339                 if (err)
 340                         return err;
 341         }
 342         if (data[IFLA_BOND_PRIMARY_RESELECT]) {
 343                 int primary_reselect =
 344                         nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
 345
 346                 bond_opt_initval(&newval, primary_reselect);
 347                 err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval);
 348                 if (err)
 349                         return err;
 350         }
 351         if (data[IFLA_BOND_FAIL_OVER_MAC]) {
 352                 int fail_over_mac =
 353                         nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
 354
 355                 bond_opt_initval(&newval, fail_over_mac);
 356                 err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval);
 357                 if (err)
 358                         return err;
 359         }
 360         if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
 361                 int xmit_hash_policy =
 362                         nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
 363
 364                 bond_opt_initval(&newval, xmit_hash_policy);
 365                 err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval);
 366                 if (err)
 367                         return err;
 368         }
 369         if (data[IFLA_BOND_RESEND_IGMP]) {
 370                 int resend_igmp =
 371                         nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
 372
 373                 bond_opt_initval(&newval, resend_igmp);
 374                 err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval);
 375                 if (err)
 376                         return err;
 377         }
 378         if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
 379                 int num_peer_notif =
 380                         nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
 381
 382                 bond_opt_initval(&newval, num_peer_notif);
 383                 err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval);
 384                 if (err)
 385                         return err;
 386         }
 387         if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
 388                 int all_slaves_active =
 389                         nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
 390
 391                 bond_opt_initval(&newval, all_slaves_active);
 392                 err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval);
 393                 if (err)
 394                         return err;
 395         }
 396         if (data[IFLA_BOND_MIN_LINKS]) {
 397                 int min_links =
 398                         nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
 399
 400                 bond_opt_initval(&newval, min_links);
 401                 err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval);
 402                 if (err)
 403                         return err;
 404         }
 405         if (data[IFLA_BOND_LP_INTERVAL]) {
 406                 int lp_interval =
 407                         nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
 408
 409                 bond_opt_initval(&newval, lp_interval);
 410                 err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval);
 411                 if (err)
 412                         return err;
 413         }
 414         if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
 415                 int packets_per_slave =
 416                         nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
 417
 418                 bond_opt_initval(&newval, packets_per_slave);
 419                 err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval);
 420                 if (err)
 421                         return err;
 422         }
 423
 424         if (data[IFLA_BOND_AD_LACP_ACTIVE]) {
 425                 int lacp_active = nla_get_u8(data[IFLA_BOND_AD_LACP_ACTIVE]);
 426
 427                 bond_opt_initval(&newval, lacp_active);
 428                 err = __bond_opt_set(bond, BOND_OPT_LACP_ACTIVE, &newval);
 429                 if (err)
 430                         return err;
 431         }
 432
 433         if (data[IFLA_BOND_AD_LACP_RATE]) {
 434                 int lacp_rate =
 435                         nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
 436
 437                 bond_opt_initval(&newval, lacp_rate);
 438                 err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval);
 439                 if (err)
 440                         return err;
 441         }
 442         if (data[IFLA_BOND_AD_SELECT]) {
 443                 int ad_select =
 444                         nla_get_u8(data[IFLA_BOND_AD_SELECT]);
 445
 446                 bond_opt_initval(&newval, ad_select);
 447                 err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval);
 448                 if (err)
 449                         return err;
 450         }
 451         if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
 452                 int actor_sys_prio =
 453                         nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
 454
 455                 bond_opt_initval(&newval, actor_sys_prio);
 456                 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval);
 457                 if (err)
 458                         return err;
 459         }
 460         if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
 461                 int port_key =
 462                         nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
 463
 464                 bond_opt_initval(&newval, port_key);
 465                 err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval);
 466                 if (err)
 467                         return err;
 468         }
 469         if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
 470                 if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
 471                         return -EINVAL;
 472
 473                 bond_opt_initval(&newval,
 474                                  nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
 475                 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval);
 476                 if (err)
 477                         return err;
 478         }
 479         if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
 480                 int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
 481
 482                 bond_opt_initval(&newval, dynamic_lb);
 483                 err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval);
 484                 if (err)
 485                         return err;
 486         }
 487
 488         if (data[IFLA_BOND_MISSED_MAX]) {
 489                 int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]);
 490
 491                 bond_opt_initval(&newval, missed_max);
 492                 err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval);
 493                 if (err)
 494                         return err;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
 501                         struct nlattr *tb[], struct nlattr *data[],
 502                         struct netlink_ext_ack *extack)
 503 {
 504         int err;
 505
 506         err = bond_changelink(bond_dev, tb, data, extack);
 507         if (err < 0)
 508                 return err;
 509
 510         err = register_netdevice(bond_dev);
 511         if (!err) {
 512                 struct bonding *bond = netdev_priv(bond_dev);
 513
 514                 netif_carrier_off(bond_dev);
 515                 bond_work_init_all(bond);
 516         }
 517
 518         return err;
 519 }
 520
 521 static size_t bond_get_size(const struct net_device *bond_dev)
 522 {
 523         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_MODE */
 524                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ACTIVE_SLAVE */
 525                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIIMON */
 526                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_UPDELAY */
 527                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_DOWNDELAY */
 528                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_USE_CARRIER */
 529                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_INTERVAL */
 530                                                 /* IFLA_BOND_ARP_IP_TARGET */
 531                 nla_total_size(sizeof(struct nlattr)) +
 532                 nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
 533                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_VALIDATE */
 534                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_ALL_TARGETS */
 535                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PRIMARY */
 536                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_PRIMARY_RESELECT */
 537                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_FAIL_OVER_MAC */
 538                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_XMIT_HASH_POLICY */
 539                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_RESEND_IGMP */
 540                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_NUM_PEER_NOTIF */
 541                 nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
 542                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIN_LINKS */
 543                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_LP_INTERVAL */
 544                 nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
 545                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_ACTIVE */
 546                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_RATE */
 547                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_SELECT */
 548                 nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
 549                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
 550                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
 551                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
 552                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
 553                 nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
 554                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
 555                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
 556                 nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
 557                 nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
 558                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PEER_NOTIF_DELAY */
 559                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_MISSED_MAX */
 560                                                 /* IFLA_BOND_NS_IP6_TARGET */
 561                 nla_total_size(sizeof(struct nlattr)) +
 562                 nla_total_size(sizeof(struct in6_addr)) * BOND_MAX_NS_TARGETS +
 563                 0;
 564 }
 565
 566 static int bond_option_active_slave_get_ifindex(struct bonding *bond)
 567 {
 568         const struct net_device *slave;
 569         int ifindex;
 570
 571         rcu_read_lock();
 572         slave = bond_option_active_slave_get_rcu(bond);
 573         ifindex = slave ? slave->ifindex : 0;
 574         rcu_read_unlock();
 575         return ifindex;
 576 }
 577
 578 static int bond_fill_info(struct sk_buff *skb,
 579                           const struct net_device *bond_dev)
 580 {
 581         struct bonding *bond = netdev_priv(bond_dev);
 582         unsigned int packets_per_slave;
 583         int ifindex, i, targets_added;
 584         struct nlattr *targets;
 585         struct slave *primary;
 586
 587         if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
 588                 goto nla_put_failure;
 589
 590         ifindex = bond_option_active_slave_get_ifindex(bond);
 591         if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
 592                 goto nla_put_failure;
 593
 594         if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
 595                 goto nla_put_failure;
 596
 597         if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
 598                         bond->params.updelay * bond->params.miimon))
 599                 goto nla_put_failure;
 600
 601         if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
 602                         bond->params.downdelay * bond->params.miimon))
 603                 goto nla_put_failure;
 604
 605         if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY,
 606                         bond->params.peer_notif_delay * bond->params.miimon))
 607                 goto nla_put_failure;
 608
 609         if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
 610                 goto nla_put_failure;
 611
 612         if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
 613                 goto nla_put_failure;
 614
 615         targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET);
 616         if (!targets)
 617                 goto nla_put_failure;
 618
 619         targets_added = 0;
 620         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 621                 if (bond->params.arp_targets[i]) {
 622                         if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
 623                                 goto nla_put_failure;
 624                         targets_added = 1;
 625                 }
 626         }
 627
 628         if (targets_added)
 629                 nla_nest_end(skb, targets);
 630         else
 631                 nla_nest_cancel(skb, targets);
 632
 633         if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
 634                 goto nla_put_failure;
 635
 636         if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
 637                         bond->params.arp_all_targets))
 638                 goto nla_put_failure;
 639
 640 #if IS_ENABLED(CONFIG_IPV6)
 641         targets = nla_nest_start(skb, IFLA_BOND_NS_IP6_TARGET);
 642         if (!targets)
 643                 goto nla_put_failure;
 644
 645         targets_added = 0;
 646         for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
 647                 if (!ipv6_addr_any(&bond->params.ns_targets[i])) {
 648                         if (nla_put_in6_addr(skb, i, &bond->params.ns_targets[i]))
 649                                 goto nla_put_failure;
 650                         targets_added = 1;
 651                 }
 652         }
 653
 654         if (targets_added)
 655                 nla_nest_end(skb, targets);
 656         else
 657                 nla_nest_cancel(skb, targets);
 658 #endif
 659
 660         primary = rtnl_dereference(bond->primary_slave);
 661         if (primary &&
 662             nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
 663                 goto nla_put_failure;
 664
 665         if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
 666                        bond->params.primary_reselect))
 667                 goto nla_put_failure;
 668
 669         if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
 670                        bond->params.fail_over_mac))
 671                 goto nla_put_failure;
 672
 673         if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
 674                        bond->params.xmit_policy))
 675                 goto nla_put_failure;
 676
 677         if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
 678                         bond->params.resend_igmp))
 679                 goto nla_put_failure;
 680
 681         if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
 682                        bond->params.num_peer_notif))
 683                 goto nla_put_failure;
 684
 685         if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
 686                        bond->params.all_slaves_active))
 687                 goto nla_put_failure;
 688
 689         if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
 690                         bond->params.min_links))
 691                 goto nla_put_failure;
 692
 693         if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
 694                         bond->params.lp_interval))
 695                 goto nla_put_failure;
 696
 697         packets_per_slave = bond->params.packets_per_slave;
 698         if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
 699                         packets_per_slave))
 700                 goto nla_put_failure;
 701
 702         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_ACTIVE,
 703                        bond->params.lacp_active))
 704                 goto nla_put_failure;
 705
 706         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
 707                        bond->params.lacp_fast))
 708                 goto nla_put_failure;
 709
 710         if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
 711                        bond->params.ad_select))
 712                 goto nla_put_failure;
 713
 714         if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
 715                        bond->params.tlb_dynamic_lb))
 716                 goto nla_put_failure;
 717
 718         if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX,
 719                        bond->params.missed_max))
 720                 goto nla_put_failure;
 721
 722         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 723                 struct ad_info info;
 724
 725                 if (capable(CAP_NET_ADMIN)) {
 726                         if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
 727                                         bond->params.ad_actor_sys_prio))
 728                                 goto nla_put_failure;
 729
 730                         if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
 731                                         bond->params.ad_user_port_key))
 732                                 goto nla_put_failure;
 733
 734                         if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
 735                                     ETH_ALEN, &bond->params.ad_actor_system))
 736                                 goto nla_put_failure;
 737                 }
 738                 if (!bond_3ad_get_active_agg_info(bond, &info)) {
 739                         struct nlattr *nest;
 740
 741                         nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO);
 742                         if (!nest)
 743                                 goto nla_put_failure;
 744
 745                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
 746                                         info.aggregator_id))
 747                                 goto nla_put_failure;
 748                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
 749                                         info.ports))
 750                                 goto nla_put_failure;
 751                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
 752                                         info.actor_key))
 753                                 goto nla_put_failure;
 754                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
 755                                         info.partner_key))
 756                                 goto nla_put_failure;
 757                         if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
 758                                     sizeof(info.partner_system),
 759                                     &info.partner_system))
 760                                 goto nla_put_failure;
 761
 762                         nla_nest_end(skb, nest);
 763                 }
 764         }
 765
 766         return 0;
 767
 768 nla_put_failure:
 769         return -EMSGSIZE;
 770 }
 771
 772 static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
 773 {
 774         switch (attr) {
 775         case IFLA_STATS_LINK_XSTATS:
 776         case IFLA_STATS_LINK_XSTATS_SLAVE:
 777                 break;
 778         default:
 779                 return 0;
 780         }
 781
 782         return bond_3ad_stats_size() + nla_total_size(0);
 783 }
 784
 785 static int bond_fill_linkxstats(struct sk_buff *skb,
 786                                 const struct net_device *dev,
 787                                 int *prividx, int attr)
 788 {
 789         struct nlattr *nla __maybe_unused;
 790         struct slave *slave = NULL;
 791         struct nlattr *nest, *nest2;
 792         struct bonding *bond;
 793
 794         switch (attr) {
 795         case IFLA_STATS_LINK_XSTATS:
 796                 bond = netdev_priv(dev);
 797                 break;
 798         case IFLA_STATS_LINK_XSTATS_SLAVE:
 799                 slave = bond_slave_get_rtnl(dev);
 800                 if (!slave)
 801                         return 0;
 802                 bond = slave->bond;
 803                 break;
 804         default:
 805                 return -EINVAL;
 806         }
 807
 808         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND);
 809         if (!nest)
 810                 return -EMSGSIZE;
 811         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 812                 struct bond_3ad_stats *stats;
 813
 814                 if (slave)
 815                         stats = &SLAVE_AD_INFO(slave)->stats;
 816                 else
 817                         stats = &BOND_AD_INFO(bond).stats;
 818
 819                 nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD);
 820                 if (!nest2) {
 821                         nla_nest_end(skb, nest);
 822                         return -EMSGSIZE;
 823                 }
 824
 825                 if (bond_3ad_stats_fill(skb, stats)) {
 826                         nla_nest_cancel(skb, nest2);
 827                         nla_nest_end(skb, nest);
 828                         return -EMSGSIZE;
 829                 }
 830                 nla_nest_end(skb, nest2);
 831         }
 832         nla_nest_end(skb, nest);
 833
 834         return 0;
 835 }
 836
 837 struct rtnl_link_ops bond_link_ops __read_mostly = {
 838         .kind                   = "bond",
 839         .priv_size              = sizeof(struct bonding),
 840         .setup                  = bond_setup,
 841         .maxtype                = IFLA_BOND_MAX,
 842         .policy                 = bond_policy,
 843         .validate               = bond_validate,
 844         .newlink                = bond_newlink,
 845         .changelink             = bond_changelink,
 846         .get_size               = bond_get_size,
 847         .fill_info              = bond_fill_info,
 848         .get_num_tx_queues      = bond_get_num_tx_queues,
 849         .get_num_rx_queues      = bond_get_num_tx_queues, /* Use the same number
 850                                                              as for TX queues */
 851         .fill_linkxstats        = bond_fill_linkxstats,
 852         .get_linkxstats_size    = bond_get_linkxstats_size,
 853         .slave_maxtype          = IFLA_BOND_SLAVE_MAX,
 854         .slave_policy           = bond_slave_policy,
 855         .slave_changelink       = bond_slave_changelink,
 856         .get_slave_size         = bond_get_slave_size,
 857         .fill_slave_info        = bond_fill_slave_info,
 858 };
 859
 860 int __init bond_netlink_init(void)
 861 {
 862         return rtnl_link_register(&bond_link_ops);
 863 }
 864
 865 void bond_netlink_fini(void)
 866 {
 867         rtnl_link_unregister(&bond_link_ops);
 868 }
 869
 870 MODULE_ALIAS_RTNL_LINK("bond");