drivers/net/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                 nla_total_size(sizeof(s32)) +   /* IFLA_BOND_SLAVE_PRIO */
  31                 0;
  32 }
  33
  34 static int bond_fill_slave_info(struct sk_buff *skb,
  35                                 const struct net_device *bond_dev,
  36                                 const struct net_device *slave_dev)
  37 {
  38         struct slave *slave = bond_slave_get_rtnl(slave_dev);
  39
  40         if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
  41                 goto nla_put_failure;
  42
  43         if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
  44                 goto nla_put_failure;
  45
  46         if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
  47                         slave->link_failure_count))
  48                 goto nla_put_failure;
  49
  50         if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
  51                     slave_dev->addr_len, slave->perm_hwaddr))
  52                 goto nla_put_failure;
  53
  54         if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
  55                 goto nla_put_failure;
  56
  57         if (nla_put_s32(skb, IFLA_BOND_SLAVE_PRIO, slave->prio))
  58                 goto nla_put_failure;
  59
  60         if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  61                 const struct aggregator *agg;
  62                 const struct port *ad_port;
  63
  64                 ad_port = &SLAVE_AD_INFO(slave)->port;
  65                 agg = SLAVE_AD_INFO(slave)->port.aggregator;
  66                 if (agg) {
  67                         if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
  68                                         agg->aggregator_identifier))
  69                                 goto nla_put_failure;
  70                         if (nla_put_u8(skb,
  71                                        IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
  72                                        ad_port->actor_oper_port_state))
  73                                 goto nla_put_failure;
  74                         if (nla_put_u16(skb,
  75                                         IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
  76                                         ad_port->partner_oper.port_state))
  77                                 goto nla_put_failure;
  78                 }
  79         }
  80
  81         return 0;
  82
  83 nla_put_failure:
  84         return -EMSGSIZE;
  85 }
  86
  87 /* Limit the max delay range to 300s */
  88 static const struct netlink_range_validation delay_range = {
  89         .max = 300000,
  90 };
  91
  92 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
  93         [IFLA_BOND_MODE]                = { .type = NLA_U8 },
  94         [IFLA_BOND_ACTIVE_SLAVE]        = { .type = NLA_U32 },
  95         [IFLA_BOND_MIIMON]              = { .type = NLA_U32 },
  96         [IFLA_BOND_UPDELAY]             = { .type = NLA_U32 },
  97         [IFLA_BOND_DOWNDELAY]           = { .type = NLA_U32 },
  98         [IFLA_BOND_USE_CARRIER]         = { .type = NLA_U8 },
  99         [IFLA_BOND_ARP_INTERVAL]        = { .type = NLA_U32 },
 100         [IFLA_BOND_ARP_IP_TARGET]       = { .type = NLA_NESTED },
 101         [IFLA_BOND_ARP_VALIDATE]        = { .type = NLA_U32 },
 102         [IFLA_BOND_ARP_ALL_TARGETS]     = { .type = NLA_U32 },
 103         [IFLA_BOND_PRIMARY]             = { .type = NLA_U32 },
 104         [IFLA_BOND_PRIMARY_RESELECT]    = { .type = NLA_U8 },
 105         [IFLA_BOND_FAIL_OVER_MAC]       = { .type = NLA_U8 },
 106         [IFLA_BOND_XMIT_HASH_POLICY]    = { .type = NLA_U8 },
 107         [IFLA_BOND_RESEND_IGMP]         = { .type = NLA_U32 },
 108         [IFLA_BOND_NUM_PEER_NOTIF]      = { .type = NLA_U8 },
 109         [IFLA_BOND_ALL_SLAVES_ACTIVE]   = { .type = NLA_U8 },
 110         [IFLA_BOND_MIN_LINKS]           = { .type = NLA_U32 },
 111         [IFLA_BOND_LP_INTERVAL]         = { .type = NLA_U32 },
 112         [IFLA_BOND_PACKETS_PER_SLAVE]   = { .type = NLA_U32 },
 113         [IFLA_BOND_AD_LACP_ACTIVE]      = { .type = NLA_U8 },
 114         [IFLA_BOND_AD_LACP_RATE]        = { .type = NLA_U8 },
 115         [IFLA_BOND_AD_SELECT]           = { .type = NLA_U8 },
 116         [IFLA_BOND_AD_INFO]             = { .type = NLA_NESTED },
 117         [IFLA_BOND_AD_ACTOR_SYS_PRIO]   = { .type = NLA_U16 },
 118         [IFLA_BOND_AD_USER_PORT_KEY]    = { .type = NLA_U16 },
 119         [IFLA_BOND_AD_ACTOR_SYSTEM]     = { .type = NLA_BINARY,
 120                                             .len  = ETH_ALEN },
 121         [IFLA_BOND_TLB_DYNAMIC_LB]      = { .type = NLA_U8 },
 122         [IFLA_BOND_PEER_NOTIF_DELAY]    = NLA_POLICY_FULL_RANGE(NLA_U32, &delay_range),
 123         [IFLA_BOND_MISSED_MAX]          = { .type = NLA_U8 },
 124         [IFLA_BOND_NS_IP6_TARGET]       = { .type = NLA_NESTED },
 125 };
 126
 127 static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
 128         [IFLA_BOND_SLAVE_QUEUE_ID]      = { .type = NLA_U16 },
 129         [IFLA_BOND_SLAVE_PRIO]          = { .type = NLA_S32 },
 130 };
 131
 132 static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
 133                          struct netlink_ext_ack *extack)
 134 {
 135         if (tb[IFLA_ADDRESS]) {
 136                 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 137                         return -EINVAL;
 138                 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
 139                         return -EADDRNOTAVAIL;
 140         }
 141         return 0;
 142 }
 143
 144 static int bond_slave_changelink(struct net_device *bond_dev,
 145                                  struct net_device *slave_dev,
 146                                  struct nlattr *tb[], struct nlattr *data[],
 147                                  struct netlink_ext_ack *extack)
 148 {
 149         struct bonding *bond = netdev_priv(bond_dev);
 150         struct bond_opt_value newval;
 151         int err;
 152
 153         if (!data)
 154                 return 0;
 155
 156         if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
 157                 u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
 158                 char queue_id_str[IFNAMSIZ + 7];
 159
 160                 /* queue_id option setting expects slave_name:queue_id */
 161                 snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
 162                          slave_dev->name, queue_id);
 163                 bond_opt_initstr(&newval, queue_id_str);
 164                 err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval,
 165                                      data[IFLA_BOND_SLAVE_QUEUE_ID], extack);
 166                 if (err)
 167                         return err;
 168         }
 169
 170         if (data[IFLA_BOND_SLAVE_PRIO]) {
 171                 int prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]);
 172
 173                 bond_opt_slave_initval(&newval, &slave_dev, prio);
 174                 err = __bond_opt_set(bond, BOND_OPT_PRIO, &newval,
 175                                      data[IFLA_BOND_SLAVE_PRIO], extack);
 176                 if (err)
 177                         return err;
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
 184                            struct nlattr *data[],
 185                            struct netlink_ext_ack *extack)
 186 {
 187         struct bonding *bond = netdev_priv(bond_dev);
 188         struct bond_opt_value newval;
 189         int miimon = 0;
 190         int err;
 191
 192         if (!data)
 193                 return 0;
 194
 195         if (data[IFLA_BOND_MODE]) {
 196                 int mode = nla_get_u8(data[IFLA_BOND_MODE]);
 197
 198                 bond_opt_initval(&newval, mode);
 199                 err = __bond_opt_set(bond, BOND_OPT_MODE, &newval,
 200                                      data[IFLA_BOND_MODE], extack);
 201                 if (err)
 202                         return err;
 203         }
 204         if (data[IFLA_BOND_ACTIVE_SLAVE]) {
 205                 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
 206                 struct net_device *slave_dev;
 207                 char *active_slave = "";
 208
 209                 if (ifindex != 0) {
 210                         slave_dev = __dev_get_by_index(dev_net(bond_dev),
 211                                                        ifindex);
 212                         if (!slave_dev)
 213                                 return -ENODEV;
 214                         active_slave = slave_dev->name;
 215                 }
 216                 bond_opt_initstr(&newval, active_slave);
 217                 err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval,
 218                                      data[IFLA_BOND_ACTIVE_SLAVE], extack);
 219                 if (err)
 220                         return err;
 221         }
 222         if (data[IFLA_BOND_MIIMON]) {
 223                 miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);
 224
 225                 bond_opt_initval(&newval, miimon);
 226                 err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval,
 227                                      data[IFLA_BOND_MIIMON], extack);
 228                 if (err)
 229                         return err;
 230         }
 231         if (data[IFLA_BOND_UPDELAY]) {
 232                 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);
 233
 234                 bond_opt_initval(&newval, updelay);
 235                 err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval,
 236                                      data[IFLA_BOND_UPDELAY], extack);
 237                 if (err)
 238                         return err;
 239         }
 240         if (data[IFLA_BOND_DOWNDELAY]) {
 241                 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);
 242
 243                 bond_opt_initval(&newval, downdelay);
 244                 err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval,
 245                                      data[IFLA_BOND_DOWNDELAY], extack);
 246                 if (err)
 247                         return err;
 248         }
 249         if (data[IFLA_BOND_PEER_NOTIF_DELAY]) {
 250                 int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]);
 251
 252                 bond_opt_initval(&newval, delay);
 253                 err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval,
 254                                      data[IFLA_BOND_PEER_NOTIF_DELAY], extack);
 255                 if (err)
 256                         return err;
 257         }
 258         if (data[IFLA_BOND_USE_CARRIER]) {
 259                 int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);
 260
 261                 bond_opt_initval(&newval, use_carrier);
 262                 err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval,
 263                                      data[IFLA_BOND_USE_CARRIER], extack);
 264                 if (err)
 265                         return err;
 266         }
 267         if (data[IFLA_BOND_ARP_INTERVAL]) {
 268                 int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);
 269
 270                 if (arp_interval && miimon) {
 271                         NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
 272                                             "ARP monitoring cannot be used with MII monitoring");
 273                         return -EINVAL;
 274                 }
 275
 276                 bond_opt_initval(&newval, arp_interval);
 277                 err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval,
 278                                      data[IFLA_BOND_ARP_INTERVAL], extack);
 279                 if (err)
 280                         return err;
 281         }
 282         if (data[IFLA_BOND_ARP_IP_TARGET]) {
 283                 struct nlattr *attr;
 284                 int i = 0, rem;
 285
 286                 bond_option_arp_ip_targets_clear(bond);
 287                 nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
 288                         __be32 target;
 289
 290                         if (nla_len(attr) < sizeof(target))
 291                                 return -EINVAL;
 292
 293                         target = nla_get_be32(attr);
 294
 295                         bond_opt_initval(&newval, (__force u64)target);
 296                         err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
 297                                              &newval,
 298                                              data[IFLA_BOND_ARP_IP_TARGET],
 299                                              extack);
 300                         if (err)
 301                                 break;
 302                         i++;
 303                 }
 304                 if (i == 0 && bond->params.arp_interval)
 305                         netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
 306                 if (err)
 307                         return err;
 308         }
 309 #if IS_ENABLED(CONFIG_IPV6)
 310         if (data[IFLA_BOND_NS_IP6_TARGET]) {
 311                 struct nlattr *attr;
 312                 int i = 0, rem;
 313
 314                 bond_option_ns_ip6_targets_clear(bond);
 315                 nla_for_each_nested(attr, data[IFLA_BOND_NS_IP6_TARGET], rem) {
 316                         struct in6_addr addr6;
 317
 318                         if (nla_len(attr) < sizeof(addr6)) {
 319                                 NL_SET_ERR_MSG(extack, "Invalid IPv6 address");
 320                                 return -EINVAL;
 321                         }
 322
 323                         addr6 = nla_get_in6_addr(attr);
 324
 325                         bond_opt_initextra(&newval, &addr6, sizeof(addr6));
 326                         err = __bond_opt_set(bond, BOND_OPT_NS_TARGETS,
 327                                              &newval,
 328                                              data[IFLA_BOND_NS_IP6_TARGET],
 329                                              extack);
 330                         if (err)
 331                                 break;
 332                         i++;
 333                 }
 334                 if (i == 0 && bond->params.arp_interval)
 335                         netdev_warn(bond->dev, "Removing last ns target with arp_interval on\n");
 336                 if (err)
 337                         return err;
 338         }
 339 #endif
 340         if (data[IFLA_BOND_ARP_VALIDATE]) {
 341                 int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);
 342
 343                 if (arp_validate && miimon) {
 344                         NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
 345                                             "ARP validating cannot be used with MII monitoring");
 346                         return -EINVAL;
 347                 }
 348
 349                 bond_opt_initval(&newval, arp_validate);
 350                 err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval,
 351                                      data[IFLA_BOND_ARP_VALIDATE], extack);
 352                 if (err)
 353                         return err;
 354         }
 355         if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
 356                 int arp_all_targets =
 357                         nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);
 358
 359                 bond_opt_initval(&newval, arp_all_targets);
 360                 err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval,
 361                                      data[IFLA_BOND_ARP_ALL_TARGETS], extack);
 362                 if (err)
 363                         return err;
 364         }
 365         if (data[IFLA_BOND_PRIMARY]) {
 366                 int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
 367                 struct net_device *dev;
 368                 char *primary = "";
 369
 370                 dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
 371                 if (dev)
 372                         primary = dev->name;
 373
 374                 bond_opt_initstr(&newval, primary);
 375                 err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval,
 376                                      data[IFLA_BOND_PRIMARY], extack);
 377                 if (err)
 378                         return err;
 379         }
 380         if (data[IFLA_BOND_PRIMARY_RESELECT]) {
 381                 int primary_reselect =
 382                         nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);
 383
 384                 bond_opt_initval(&newval, primary_reselect);
 385                 err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval,
 386                                      data[IFLA_BOND_PRIMARY_RESELECT], extack);
 387                 if (err)
 388                         return err;
 389         }
 390         if (data[IFLA_BOND_FAIL_OVER_MAC]) {
 391                 int fail_over_mac =
 392                         nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);
 393
 394                 bond_opt_initval(&newval, fail_over_mac);
 395                 err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval,
 396                                      data[IFLA_BOND_FAIL_OVER_MAC], extack);
 397                 if (err)
 398                         return err;
 399         }
 400         if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
 401                 int xmit_hash_policy =
 402                         nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);
 403
 404                 bond_opt_initval(&newval, xmit_hash_policy);
 405                 err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval,
 406                                      data[IFLA_BOND_XMIT_HASH_POLICY], extack);
 407                 if (err)
 408                         return err;
 409         }
 410         if (data[IFLA_BOND_RESEND_IGMP]) {
 411                 int resend_igmp =
 412                         nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);
 413
 414                 bond_opt_initval(&newval, resend_igmp);
 415                 err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval,
 416                                      data[IFLA_BOND_RESEND_IGMP], extack);
 417                 if (err)
 418                         return err;
 419         }
 420         if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
 421                 int num_peer_notif =
 422                         nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);
 423
 424                 bond_opt_initval(&newval, num_peer_notif);
 425                 err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval,
 426                                      data[IFLA_BOND_NUM_PEER_NOTIF], extack);
 427                 if (err)
 428                         return err;
 429         }
 430         if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
 431                 int all_slaves_active =
 432                         nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);
 433
 434                 bond_opt_initval(&newval, all_slaves_active);
 435                 err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval,
 436                                      data[IFLA_BOND_ALL_SLAVES_ACTIVE], extack);
 437                 if (err)
 438                         return err;
 439         }
 440         if (data[IFLA_BOND_MIN_LINKS]) {
 441                 int min_links =
 442                         nla_get_u32(data[IFLA_BOND_MIN_LINKS]);
 443
 444                 bond_opt_initval(&newval, min_links);
 445                 err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval,
 446                                      data[IFLA_BOND_MIN_LINKS], extack);
 447                 if (err)
 448                         return err;
 449         }
 450         if (data[IFLA_BOND_LP_INTERVAL]) {
 451                 int lp_interval =
 452                         nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);
 453
 454                 bond_opt_initval(&newval, lp_interval);
 455                 err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval,
 456                                      data[IFLA_BOND_LP_INTERVAL], extack);
 457                 if (err)
 458                         return err;
 459         }
 460         if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
 461                 int packets_per_slave =
 462                         nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);
 463
 464                 bond_opt_initval(&newval, packets_per_slave);
 465                 err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval,
 466                                      data[IFLA_BOND_PACKETS_PER_SLAVE], extack);
 467                 if (err)
 468                         return err;
 469         }
 470
 471         if (data[IFLA_BOND_AD_LACP_ACTIVE]) {
 472                 int lacp_active = nla_get_u8(data[IFLA_BOND_AD_LACP_ACTIVE]);
 473
 474                 bond_opt_initval(&newval, lacp_active);
 475                 err = __bond_opt_set(bond, BOND_OPT_LACP_ACTIVE, &newval,
 476                                      data[IFLA_BOND_AD_LACP_ACTIVE], extack);
 477                 if (err)
 478                         return err;
 479         }
 480
 481         if (data[IFLA_BOND_AD_LACP_RATE]) {
 482                 int lacp_rate =
 483                         nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);
 484
 485                 bond_opt_initval(&newval, lacp_rate);
 486                 err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval,
 487                                      data[IFLA_BOND_AD_LACP_RATE], extack);
 488                 if (err)
 489                         return err;
 490         }
 491         if (data[IFLA_BOND_AD_SELECT]) {
 492                 int ad_select =
 493                         nla_get_u8(data[IFLA_BOND_AD_SELECT]);
 494
 495                 bond_opt_initval(&newval, ad_select);
 496                 err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval,
 497                                      data[IFLA_BOND_AD_SELECT], extack);
 498                 if (err)
 499                         return err;
 500         }
 501         if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
 502                 int actor_sys_prio =
 503                         nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);
 504
 505                 bond_opt_initval(&newval, actor_sys_prio);
 506                 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval,
 507                                      data[IFLA_BOND_AD_ACTOR_SYS_PRIO], extack);
 508                 if (err)
 509                         return err;
 510         }
 511         if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
 512                 int port_key =
 513                         nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);
 514
 515                 bond_opt_initval(&newval, port_key);
 516                 err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval,
 517                                      data[IFLA_BOND_AD_USER_PORT_KEY], extack);
 518                 if (err)
 519                         return err;
 520         }
 521         if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
 522                 if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
 523                         return -EINVAL;
 524
 525                 bond_opt_initval(&newval,
 526                                  nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
 527                 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval,
 528                                      data[IFLA_BOND_AD_ACTOR_SYSTEM], extack);
 529                 if (err)
 530                         return err;
 531         }
 532         if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
 533                 int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);
 534
 535                 bond_opt_initval(&newval, dynamic_lb);
 536                 err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval,
 537                                      data[IFLA_BOND_TLB_DYNAMIC_LB], extack);
 538                 if (err)
 539                         return err;
 540         }
 541
 542         if (data[IFLA_BOND_MISSED_MAX]) {
 543                 int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]);
 544
 545                 bond_opt_initval(&newval, missed_max);
 546                 err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval,
 547                                      data[IFLA_BOND_MISSED_MAX], extack);
 548                 if (err)
 549                         return err;
 550         }
 551
 552         return 0;
 553 }
 554
 555 static int bond_newlink(struct net *src_net, struct net_device *bond_dev,
 556                         struct nlattr *tb[], struct nlattr *data[],
 557                         struct netlink_ext_ack *extack)
 558 {
 559         int err;
 560
 561         err = bond_changelink(bond_dev, tb, data, extack);
 562         if (err < 0)
 563                 return err;
 564
 565         err = register_netdevice(bond_dev);
 566         if (!err) {
 567                 struct bonding *bond = netdev_priv(bond_dev);
 568
 569                 netif_carrier_off(bond_dev);
 570                 bond_work_init_all(bond);
 571         }
 572
 573         return err;
 574 }
 575
 576 static size_t bond_get_size(const struct net_device *bond_dev)
 577 {
 578         return nla_total_size(sizeof(u8)) +     /* IFLA_BOND_MODE */
 579                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ACTIVE_SLAVE */
 580                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIIMON */
 581                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_UPDELAY */
 582                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_DOWNDELAY */
 583                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_USE_CARRIER */
 584                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_INTERVAL */
 585                                                 /* IFLA_BOND_ARP_IP_TARGET */
 586                 nla_total_size(sizeof(struct nlattr)) +
 587                 nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
 588                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_VALIDATE */
 589                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_ARP_ALL_TARGETS */
 590                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PRIMARY */
 591                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_PRIMARY_RESELECT */
 592                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_FAIL_OVER_MAC */
 593                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_XMIT_HASH_POLICY */
 594                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_RESEND_IGMP */
 595                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_NUM_PEER_NOTIF */
 596                 nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
 597                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_MIN_LINKS */
 598                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_LP_INTERVAL */
 599                 nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
 600                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_ACTIVE */
 601                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_LACP_RATE */
 602                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_AD_SELECT */
 603                 nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
 604                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
 605                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
 606                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
 607                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
 608                 nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
 609                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
 610                 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
 611                 nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
 612                 nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
 613                 nla_total_size(sizeof(u32)) +   /* IFLA_BOND_PEER_NOTIF_DELAY */
 614                 nla_total_size(sizeof(u8)) +    /* IFLA_BOND_MISSED_MAX */
 615                                                 /* IFLA_BOND_NS_IP6_TARGET */
 616                 nla_total_size(sizeof(struct nlattr)) +
 617                 nla_total_size(sizeof(struct in6_addr)) * BOND_MAX_NS_TARGETS +
 618                 0;
 619 }
 620
 621 static int bond_option_active_slave_get_ifindex(struct bonding *bond)
 622 {
 623         const struct net_device *slave;
 624         int ifindex;
 625
 626         rcu_read_lock();
 627         slave = bond_option_active_slave_get_rcu(bond);
 628         ifindex = slave ? slave->ifindex : 0;
 629         rcu_read_unlock();
 630         return ifindex;
 631 }
 632
 633 static int bond_fill_info(struct sk_buff *skb,
 634                           const struct net_device *bond_dev)
 635 {
 636         struct bonding *bond = netdev_priv(bond_dev);
 637         unsigned int packets_per_slave;
 638         int ifindex, i, targets_added;
 639         struct nlattr *targets;
 640         struct slave *primary;
 641
 642         if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
 643                 goto nla_put_failure;
 644
 645         ifindex = bond_option_active_slave_get_ifindex(bond);
 646         if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
 647                 goto nla_put_failure;
 648
 649         if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
 650                 goto nla_put_failure;
 651
 652         if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
 653                         bond->params.updelay * bond->params.miimon))
 654                 goto nla_put_failure;
 655
 656         if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
 657                         bond->params.downdelay * bond->params.miimon))
 658                 goto nla_put_failure;
 659
 660         if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY,
 661                         bond->params.peer_notif_delay * bond->params.miimon))
 662                 goto nla_put_failure;
 663
 664         if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
 665                 goto nla_put_failure;
 666
 667         if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
 668                 goto nla_put_failure;
 669
 670         targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET);
 671         if (!targets)
 672                 goto nla_put_failure;
 673
 674         targets_added = 0;
 675         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
 676                 if (bond->params.arp_targets[i]) {
 677                         if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
 678                                 goto nla_put_failure;
 679                         targets_added = 1;
 680                 }
 681         }
 682
 683         if (targets_added)
 684                 nla_nest_end(skb, targets);
 685         else
 686                 nla_nest_cancel(skb, targets);
 687
 688         if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
 689                 goto nla_put_failure;
 690
 691         if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
 692                         bond->params.arp_all_targets))
 693                 goto nla_put_failure;
 694
 695 #if IS_ENABLED(CONFIG_IPV6)
 696         targets = nla_nest_start(skb, IFLA_BOND_NS_IP6_TARGET);
 697         if (!targets)
 698                 goto nla_put_failure;
 699
 700         targets_added = 0;
 701         for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
 702                 if (!ipv6_addr_any(&bond->params.ns_targets[i])) {
 703                         if (nla_put_in6_addr(skb, i, &bond->params.ns_targets[i]))
 704                                 goto nla_put_failure;
 705                         targets_added = 1;
 706                 }
 707         }
 708
 709         if (targets_added)
 710                 nla_nest_end(skb, targets);
 711         else
 712                 nla_nest_cancel(skb, targets);
 713 #endif
 714
 715         primary = rtnl_dereference(bond->primary_slave);
 716         if (primary &&
 717             nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
 718                 goto nla_put_failure;
 719
 720         if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
 721                        bond->params.primary_reselect))
 722                 goto nla_put_failure;
 723
 724         if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
 725                        bond->params.fail_over_mac))
 726                 goto nla_put_failure;
 727
 728         if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
 729                        bond->params.xmit_policy))
 730                 goto nla_put_failure;
 731
 732         if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
 733                         bond->params.resend_igmp))
 734                 goto nla_put_failure;
 735
 736         if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
 737                        bond->params.num_peer_notif))
 738                 goto nla_put_failure;
 739
 740         if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
 741                        bond->params.all_slaves_active))
 742                 goto nla_put_failure;
 743
 744         if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
 745                         bond->params.min_links))
 746                 goto nla_put_failure;
 747
 748         if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
 749                         bond->params.lp_interval))
 750                 goto nla_put_failure;
 751
 752         packets_per_slave = bond->params.packets_per_slave;
 753         if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
 754                         packets_per_slave))
 755                 goto nla_put_failure;
 756
 757         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_ACTIVE,
 758                        bond->params.lacp_active))
 759                 goto nla_put_failure;
 760
 761         if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
 762                        bond->params.lacp_fast))
 763                 goto nla_put_failure;
 764
 765         if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
 766                        bond->params.ad_select))
 767                 goto nla_put_failure;
 768
 769         if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
 770                        bond->params.tlb_dynamic_lb))
 771                 goto nla_put_failure;
 772
 773         if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX,
 774                        bond->params.missed_max))
 775                 goto nla_put_failure;
 776
 777         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 778                 struct ad_info info;
 779
 780                 if (capable(CAP_NET_ADMIN)) {
 781                         if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
 782                                         bond->params.ad_actor_sys_prio))
 783                                 goto nla_put_failure;
 784
 785                         if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
 786                                         bond->params.ad_user_port_key))
 787                                 goto nla_put_failure;
 788
 789                         if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
 790                                     ETH_ALEN, &bond->params.ad_actor_system))
 791                                 goto nla_put_failure;
 792                 }
 793                 if (!bond_3ad_get_active_agg_info(bond, &info)) {
 794                         struct nlattr *nest;
 795
 796                         nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO);
 797                         if (!nest)
 798                                 goto nla_put_failure;
 799
 800                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
 801                                         info.aggregator_id))
 802                                 goto nla_put_failure;
 803                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
 804                                         info.ports))
 805                                 goto nla_put_failure;
 806                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
 807                                         info.actor_key))
 808                                 goto nla_put_failure;
 809                         if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
 810                                         info.partner_key))
 811                                 goto nla_put_failure;
 812                         if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
 813                                     sizeof(info.partner_system),
 814                                     &info.partner_system))
 815                                 goto nla_put_failure;
 816
 817                         nla_nest_end(skb, nest);
 818                 }
 819         }
 820
 821         return 0;
 822
 823 nla_put_failure:
 824         return -EMSGSIZE;
 825 }
 826
 827 static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
 828 {
 829         switch (attr) {
 830         case IFLA_STATS_LINK_XSTATS:
 831         case IFLA_STATS_LINK_XSTATS_SLAVE:
 832                 break;
 833         default:
 834                 return 0;
 835         }
 836
 837         return bond_3ad_stats_size() + nla_total_size(0);
 838 }
 839
 840 static int bond_fill_linkxstats(struct sk_buff *skb,
 841                                 const struct net_device *dev,
 842                                 int *prividx, int attr)
 843 {
 844         struct nlattr *nla __maybe_unused;
 845         struct slave *slave = NULL;
 846         struct nlattr *nest, *nest2;
 847         struct bonding *bond;
 848
 849         switch (attr) {
 850         case IFLA_STATS_LINK_XSTATS:
 851                 bond = netdev_priv(dev);
 852                 break;
 853         case IFLA_STATS_LINK_XSTATS_SLAVE:
 854                 slave = bond_slave_get_rtnl(dev);
 855                 if (!slave)
 856                         return 0;
 857                 bond = slave->bond;
 858                 break;
 859         default:
 860                 return -EINVAL;
 861         }
 862
 863         nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND);
 864         if (!nest)
 865                 return -EMSGSIZE;
 866         if (BOND_MODE(bond) == BOND_MODE_8023AD) {
 867                 struct bond_3ad_stats *stats;
 868
 869                 if (slave)
 870                         stats = &SLAVE_AD_INFO(slave)->stats;
 871                 else
 872                         stats = &BOND_AD_INFO(bond).stats;
 873
 874                 nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD);
 875                 if (!nest2) {
 876                         nla_nest_end(skb, nest);
 877                         return -EMSGSIZE;
 878                 }
 879
 880                 if (bond_3ad_stats_fill(skb, stats)) {
 881                         nla_nest_cancel(skb, nest2);
 882                         nla_nest_end(skb, nest);
 883                         return -EMSGSIZE;
 884                 }
 885                 nla_nest_end(skb, nest2);
 886         }
 887         nla_nest_end(skb, nest);
 888
 889         return 0;
 890 }
 891
 892 struct rtnl_link_ops bond_link_ops __read_mostly = {
 893         .kind                   = "bond",
 894         .priv_size              = sizeof(struct bonding),
 895         .setup                  = bond_setup,
 896         .maxtype                = IFLA_BOND_MAX,
 897         .policy                 = bond_policy,
 898         .validate               = bond_validate,
 899         .newlink                = bond_newlink,
 900         .changelink             = bond_changelink,
 901         .get_size               = bond_get_size,
 902         .fill_info              = bond_fill_info,
 903         .get_num_tx_queues      = bond_get_num_tx_queues,
 904         .get_num_rx_queues      = bond_get_num_tx_queues, /* Use the same number
 905                                                              as for TX queues */
 906         .fill_linkxstats        = bond_fill_linkxstats,
 907         .get_linkxstats_size    = bond_get_linkxstats_size,
 908         .slave_maxtype          = IFLA_BOND_SLAVE_MAX,
 909         .slave_policy           = bond_slave_policy,
 910         .slave_changelink       = bond_slave_changelink,
 911         .get_slave_size         = bond_get_slave_size,
 912         .fill_slave_info        = bond_fill_slave_info,
 913 };
 914
 915 int __init bond_netlink_init(void)
 916 {
 917         return rtnl_link_register(&bond_link_ops);
 918 }
 919
 920 void bond_netlink_fini(void)
 921 {
 922         rtnl_link_unregister(&bond_link_ops);
 923 }
 924
 925 MODULE_ALIAS_RTNL_LINK("bond");