Quelle  bond_netlink.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * drivers/net/bond/bond_netlink.c - Netlink interface for bonding
 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_link.h>
#include <linux/if_ether.h>
#include <net/netlink.h>
#include <net/rtnetlink.h>
#include <net/bonding.h>
#include <net/ipv6.h>

static size_t bond_get_slave_size(const struct net_device *bond_dev,
      const struct net_device *slave_dev)
{
 return nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_STATE */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_MII_STATUS */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */
  nla_total_size(MAX_ADDR_LEN) + /* IFLA_BOND_SLAVE_PERM_HWADDR */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_QUEUE_ID */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
  nla_total_size(sizeof(s32)) + /* IFLA_BOND_SLAVE_PRIO */
  0;
}

static int bond_fill_slave_info(struct sk_buff *skb,
    const struct net_device *bond_dev,
    const struct net_device *slave_dev)
{
 struct slave *slave = bond_slave_get_rtnl(slave_dev);

 if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave)))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT,
   slave->link_failure_count))
  goto nla_put_failure;

 if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR,
      slave_dev->addr_len, slave->perm_hwaddr))
  goto nla_put_failure;

 if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID,
   READ_ONCE(slave->queue_id)))
  goto nla_put_failure;

 if (nla_put_s32(skb, IFLA_BOND_SLAVE_PRIO, slave->prio))
  goto nla_put_failure;

 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
  const struct aggregator *agg;
  const struct port *ad_port;

  ad_port = &SLAVE_AD_INFO(slave)->port;
  agg = SLAVE_AD_INFO(slave)->port.aggregator;
  if (agg) {
   if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
     agg->aggregator_identifier))
    goto nla_put_failure;
   if (nla_put_u8(skb,
           IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
           ad_port->actor_oper_port_state))
    goto nla_put_failure;
   if (nla_put_u16(skb,
     IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
     ad_port->partner_oper.port_state))
    goto nla_put_failure;
  }
 }

 return 0;

nla_put_failure:
 return -EMSGSIZE;
}

/* Limit the max delay range to 300s */
static const struct netlink_range_validation delay_range = {
 .max = 300000,
};

static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
 [IFLA_BOND_MODE]  = { .type = NLA_U8 },
 [IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 },
 [IFLA_BOND_MIIMON]  = { .type = NLA_U32 },
 [IFLA_BOND_UPDELAY]  = { .type = NLA_U32 },
 [IFLA_BOND_DOWNDELAY]  = { .type = NLA_U32 },
 [IFLA_BOND_USE_CARRIER]  = { .type = NLA_U8 },
 [IFLA_BOND_ARP_INTERVAL] = { .type = NLA_U32 },
 [IFLA_BOND_ARP_IP_TARGET] = { .type = NLA_NESTED },
 [IFLA_BOND_ARP_VALIDATE] = { .type = NLA_U32 },
 [IFLA_BOND_ARP_ALL_TARGETS] = { .type = NLA_U32 },
 [IFLA_BOND_PRIMARY]  = { .type = NLA_U32 },
 [IFLA_BOND_PRIMARY_RESELECT] = { .type = NLA_U8 },
 [IFLA_BOND_FAIL_OVER_MAC] = { .type = NLA_U8 },
 [IFLA_BOND_XMIT_HASH_POLICY] = { .type = NLA_U8 },
 [IFLA_BOND_RESEND_IGMP]  = { .type = NLA_U32 },
 [IFLA_BOND_NUM_PEER_NOTIF] = { .type = NLA_U8 },
 [IFLA_BOND_ALL_SLAVES_ACTIVE] = { .type = NLA_U8 },
 [IFLA_BOND_MIN_LINKS]  = { .type = NLA_U32 },
 [IFLA_BOND_LP_INTERVAL]  = { .type = NLA_U32 },
 [IFLA_BOND_PACKETS_PER_SLAVE] = { .type = NLA_U32 },
 [IFLA_BOND_AD_LACP_ACTIVE] = { .type = NLA_U8 },
 [IFLA_BOND_AD_LACP_RATE] = { .type = NLA_U8 },
 [IFLA_BOND_AD_SELECT]  = { .type = NLA_U8 },
 [IFLA_BOND_AD_INFO]  = { .type = NLA_NESTED },
 [IFLA_BOND_AD_ACTOR_SYS_PRIO] = { .type = NLA_U16 },
 [IFLA_BOND_AD_USER_PORT_KEY] = { .type = NLA_U16 },
 [IFLA_BOND_AD_ACTOR_SYSTEM] = { .type = NLA_BINARY,
         .len  = ETH_ALEN },
 [IFLA_BOND_TLB_DYNAMIC_LB] = { .type = NLA_U8 },
 [IFLA_BOND_PEER_NOTIF_DELAY]    = NLA_POLICY_FULL_RANGE(NLA_U32, &delay_range),
 [IFLA_BOND_MISSED_MAX]  = { .type = NLA_U8 },
 [IFLA_BOND_NS_IP6_TARGET] = { .type = NLA_NESTED },
 [IFLA_BOND_COUPLED_CONTROL] = { .type = NLA_U8 },
 [IFLA_BOND_BROADCAST_NEIGH] = { .type = NLA_U8 },
};

static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
 [IFLA_BOND_SLAVE_QUEUE_ID] = { .type = NLA_U16 },
 [IFLA_BOND_SLAVE_PRIO]  = { .type = NLA_S32 },
};

static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
    struct netlink_ext_ack *extack)
{
 if (tb[IFLA_ADDRESS]) {
  if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
   return -EINVAL;
  if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
   return -EADDRNOTAVAIL;
 }
 return 0;
}

static int bond_slave_changelink(struct net_device *bond_dev,
     struct net_device *slave_dev,
     struct nlattr *tb[], struct nlattr *data[],
     struct netlink_ext_ack *extack)
{
 struct bonding *bond = netdev_priv(bond_dev);
 struct bond_opt_value newval;
 int err;

 if (!data)
  return 0;

 if (data[IFLA_BOND_SLAVE_QUEUE_ID]) {
  u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]);
  char queue_id_str[IFNAMSIZ + 7];

  /* queue_id option setting expects slave_name:queue_id */
  snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n",
    slave_dev->name, queue_id);
  bond_opt_initstr(&newval, queue_id_str);
  err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval,
         data[IFLA_BOND_SLAVE_QUEUE_ID], extack);
  if (err)
   return err;
 }

 if (data[IFLA_BOND_SLAVE_PRIO]) {
  int prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]);

  bond_opt_slave_initval(&newval, &slave_dev, prio);
  err = __bond_opt_set(bond, BOND_OPT_PRIO, &newval,
         data[IFLA_BOND_SLAVE_PRIO], extack);
  if (err)
   return err;
 }

 return 0;
}

static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[],
      struct nlattr *data[],
      struct netlink_ext_ack *extack)
{
 struct bonding *bond = netdev_priv(bond_dev);
 struct bond_opt_value newval;
 int miimon = 0;
 int err;

 if (!data)
  return 0;

 if (data[IFLA_BOND_MODE]) {
  int mode = nla_get_u8(data[IFLA_BOND_MODE]);

  bond_opt_initval(&newval, mode);
  err = __bond_opt_set(bond, BOND_OPT_MODE, &newval,
         data[IFLA_BOND_MODE], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_ACTIVE_SLAVE]) {
  int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]);
  struct net_device *slave_dev;
  char *active_slave = "";

  if (ifindex != 0) {
   slave_dev = __dev_get_by_index(dev_net(bond_dev),
             ifindex);
   if (!slave_dev)
    return -ENODEV;
   active_slave = slave_dev->name;
  }
  bond_opt_initstr(&newval, active_slave);
  err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval,
         data[IFLA_BOND_ACTIVE_SLAVE], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_MIIMON]) {
  miimon = nla_get_u32(data[IFLA_BOND_MIIMON]);

  bond_opt_initval(&newval, miimon);
  err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval,
         data[IFLA_BOND_MIIMON], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_UPDELAY]) {
  int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]);

  bond_opt_initval(&newval, updelay);
  err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval,
         data[IFLA_BOND_UPDELAY], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_DOWNDELAY]) {
  int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]);

  bond_opt_initval(&newval, downdelay);
  err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval,
         data[IFLA_BOND_DOWNDELAY], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_PEER_NOTIF_DELAY]) {
  int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]);

  bond_opt_initval(&newval, delay);
  err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval,
         data[IFLA_BOND_PEER_NOTIF_DELAY], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_USE_CARRIER]) {
  int use_carrier = nla_get_u8(data[IFLA_BOND_USE_CARRIER]);

  bond_opt_initval(&newval, use_carrier);
  err = __bond_opt_set(bond, BOND_OPT_USE_CARRIER, &newval,
         data[IFLA_BOND_USE_CARRIER], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_ARP_INTERVAL]) {
  int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]);

  if (arp_interval && miimon) {
   NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
         "ARP monitoring cannot be used with MII monitoring");
   return -EINVAL;
  }

  bond_opt_initval(&newval, arp_interval);
  err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval,
         data[IFLA_BOND_ARP_INTERVAL], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_ARP_IP_TARGET]) {
  struct nlattr *attr;
  int i = 0, rem;

  bond_option_arp_ip_targets_clear(bond);
  nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) {
   __be32 target;

   if (nla_len(attr) < sizeof(target))
    return -EINVAL;

   target = nla_get_be32(attr);

   bond_opt_initval(&newval, (__force u64)target);
   err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS,
          &newval,
          data[IFLA_BOND_ARP_IP_TARGET],
          extack);
   if (err)
    break;
   i++;
  }
  if (i == 0 && bond->params.arp_interval)
   netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
  if (err)
   return err;
 }
#if IS_ENABLED(CONFIG_IPV6)
 if (data[IFLA_BOND_NS_IP6_TARGET]) {
  struct nlattr *attr;
  int i = 0, rem;

  bond_option_ns_ip6_targets_clear(bond);
  nla_for_each_nested(attr, data[IFLA_BOND_NS_IP6_TARGET], rem) {
   struct in6_addr addr6;

   if (nla_len(attr) < sizeof(addr6)) {
    NL_SET_ERR_MSG(extack, "Invalid IPv6 address");
    return -EINVAL;
   }

   addr6 = nla_get_in6_addr(attr);

   bond_opt_initextra(&newval, &addr6, sizeof(addr6));
   err = __bond_opt_set(bond, BOND_OPT_NS_TARGETS,
          &newval,
          data[IFLA_BOND_NS_IP6_TARGET],
          extack);
   if (err)
    break;
   i++;
  }
  if (i == 0 && bond->params.arp_interval)
   netdev_warn(bond->dev, "Removing last ns target with arp_interval on\n");
  if (err)
   return err;
 }
#endif
 if (data[IFLA_BOND_ARP_VALIDATE]) {
  int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]);

  if (arp_validate && miimon) {
   NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL],
         "ARP validating cannot be used with MII monitoring");
   return -EINVAL;
  }

  bond_opt_initval(&newval, arp_validate);
  err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval,
         data[IFLA_BOND_ARP_VALIDATE], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_ARP_ALL_TARGETS]) {
  int arp_all_targets =
   nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]);

  bond_opt_initval(&newval, arp_all_targets);
  err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval,
         data[IFLA_BOND_ARP_ALL_TARGETS], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_PRIMARY]) {
  int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]);
  struct net_device *dev;
  char *primary = "";

  dev = __dev_get_by_index(dev_net(bond_dev), ifindex);
  if (dev)
   primary = dev->name;

  bond_opt_initstr(&newval, primary);
  err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval,
         data[IFLA_BOND_PRIMARY], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_PRIMARY_RESELECT]) {
  int primary_reselect =
   nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]);

  bond_opt_initval(&newval, primary_reselect);
  err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval,
         data[IFLA_BOND_PRIMARY_RESELECT], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_FAIL_OVER_MAC]) {
  int fail_over_mac =
   nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]);

  bond_opt_initval(&newval, fail_over_mac);
  err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval,
         data[IFLA_BOND_FAIL_OVER_MAC], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_XMIT_HASH_POLICY]) {
  int xmit_hash_policy =
   nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]);

  bond_opt_initval(&newval, xmit_hash_policy);
  err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval,
         data[IFLA_BOND_XMIT_HASH_POLICY], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_RESEND_IGMP]) {
  int resend_igmp =
   nla_get_u32(data[IFLA_BOND_RESEND_IGMP]);

  bond_opt_initval(&newval, resend_igmp);
  err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval,
         data[IFLA_BOND_RESEND_IGMP], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_NUM_PEER_NOTIF]) {
  int num_peer_notif =
   nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]);

  bond_opt_initval(&newval, num_peer_notif);
  err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval,
         data[IFLA_BOND_NUM_PEER_NOTIF], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) {
  int all_slaves_active =
   nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]);

  bond_opt_initval(&newval, all_slaves_active);
  err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval,
         data[IFLA_BOND_ALL_SLAVES_ACTIVE], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_MIN_LINKS]) {
  int min_links =
   nla_get_u32(data[IFLA_BOND_MIN_LINKS]);

  bond_opt_initval(&newval, min_links);
  err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval,
         data[IFLA_BOND_MIN_LINKS], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_LP_INTERVAL]) {
  int lp_interval =
   nla_get_u32(data[IFLA_BOND_LP_INTERVAL]);

  bond_opt_initval(&newval, lp_interval);
  err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval,
         data[IFLA_BOND_LP_INTERVAL], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_PACKETS_PER_SLAVE]) {
  int packets_per_slave =
   nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]);

  bond_opt_initval(&newval, packets_per_slave);
  err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval,
         data[IFLA_BOND_PACKETS_PER_SLAVE], extack);
  if (err)
   return err;
 }

 if (data[IFLA_BOND_AD_LACP_ACTIVE]) {
  int lacp_active = nla_get_u8(data[IFLA_BOND_AD_LACP_ACTIVE]);

  bond_opt_initval(&newval, lacp_active);
  err = __bond_opt_set(bond, BOND_OPT_LACP_ACTIVE, &newval,
         data[IFLA_BOND_AD_LACP_ACTIVE], extack);
  if (err)
   return err;
 }

 if (data[IFLA_BOND_AD_LACP_RATE]) {
  int lacp_rate =
   nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]);

  bond_opt_initval(&newval, lacp_rate);
  err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval,
         data[IFLA_BOND_AD_LACP_RATE], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_AD_SELECT]) {
  int ad_select =
   nla_get_u8(data[IFLA_BOND_AD_SELECT]);

  bond_opt_initval(&newval, ad_select);
  err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval,
         data[IFLA_BOND_AD_SELECT], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) {
  int actor_sys_prio =
   nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]);

  bond_opt_initval(&newval, actor_sys_prio);
  err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval,
         data[IFLA_BOND_AD_ACTOR_SYS_PRIO], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_AD_USER_PORT_KEY]) {
  int port_key =
   nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]);

  bond_opt_initval(&newval, port_key);
  err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval,
         data[IFLA_BOND_AD_USER_PORT_KEY], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) {
  if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN)
   return -EINVAL;

  bond_opt_initval(&newval,
     nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM]));
  err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval,
         data[IFLA_BOND_AD_ACTOR_SYSTEM], extack);
  if (err)
   return err;
 }
 if (data[IFLA_BOND_TLB_DYNAMIC_LB]) {
  int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]);

  bond_opt_initval(&newval, dynamic_lb);
  err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval,
         data[IFLA_BOND_TLB_DYNAMIC_LB], extack);
  if (err)
   return err;
 }

 if (data[IFLA_BOND_MISSED_MAX]) {
  int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]);

  bond_opt_initval(&newval, missed_max);
  err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval,
         data[IFLA_BOND_MISSED_MAX], extack);
  if (err)
   return err;
 }

 if (data[IFLA_BOND_COUPLED_CONTROL]) {
  int coupled_control = nla_get_u8(data[IFLA_BOND_COUPLED_CONTROL]);

  bond_opt_initval(&newval, coupled_control);
  err = __bond_opt_set(bond, BOND_OPT_COUPLED_CONTROL, &newval,
         data[IFLA_BOND_COUPLED_CONTROL], extack);
  if (err)
   return err;
 }

 if (data[IFLA_BOND_BROADCAST_NEIGH]) {
  int broadcast_neigh = nla_get_u8(data[IFLA_BOND_BROADCAST_NEIGH]);

  bond_opt_initval(&newval, broadcast_neigh);
  err = __bond_opt_set(bond, BOND_OPT_BROADCAST_NEIGH, &newval,
         data[IFLA_BOND_BROADCAST_NEIGH], extack);
  if (err)
   return err;
 }

 return 0;
}

static int bond_newlink(struct net_device *bond_dev,
   struct rtnl_newlink_params *params,
   struct netlink_ext_ack *extack)
{
 struct bonding *bond = netdev_priv(bond_dev);
 struct nlattr **data = params->data;
 struct nlattr **tb = params->tb;
 int err;

 err = register_netdevice(bond_dev);
 if (err)
  return err;

 netif_carrier_off(bond_dev);
 bond_work_init_all(bond);

 err = bond_changelink(bond_dev, tb, data, extack);
 if (err) {
  bond_work_cancel_all(bond);
  unregister_netdevice(bond_dev);
 }

 return err;
}

static size_t bond_get_size(const struct net_device *bond_dev)
{
 return nla_total_size(sizeof(u8)) + /* IFLA_BOND_MODE */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_ACTIVE_SLAVE */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIIMON */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_UPDELAY */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_USE_CARRIER */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_INTERVAL */
      /* IFLA_BOND_ARP_IP_TARGET */
  nla_total_size(sizeof(struct nlattr)) +
  nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS +
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_VALIDATE */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_ALL_TARGETS */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_PRIMARY */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_PRIMARY_RESELECT */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_FAIL_OVER_MAC */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_XMIT_HASH_POLICY */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_RESEND_IGMP */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_NUM_PEER_NOTIF */
  nla_total_size(sizeof(u8)) +   /* IFLA_BOND_ALL_SLAVES_ACTIVE */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIN_LINKS */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_LP_INTERVAL */
  nla_total_size(sizeof(u32)) +  /* IFLA_BOND_PACKETS_PER_SLAVE */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_LACP_ACTIVE */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_LACP_RATE */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_SELECT */
  nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/
  nla_total_size(ETH_ALEN) +    /* IFLA_BOND_AD_INFO_PARTNER_MAC*/
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */
  nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */
  nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */
  nla_total_size(sizeof(u32)) + /* IFLA_BOND_PEER_NOTIF_DELAY */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_MISSED_MAX */
      /* IFLA_BOND_NS_IP6_TARGET */
  nla_total_size(sizeof(struct nlattr)) +
  nla_total_size(sizeof(struct in6_addr)) * BOND_MAX_NS_TARGETS +
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_COUPLED_CONTROL */
  nla_total_size(sizeof(u8)) + /* IFLA_BOND_BROADCAST_NEIGH */
  0;
}

static int bond_option_active_slave_get_ifindex(struct bonding *bond)
{
 const struct net_device *slave;
 int ifindex;

 rcu_read_lock();
 slave = bond_option_active_slave_get_rcu(bond);
 ifindex = slave ? slave->ifindex : 0;
 rcu_read_unlock();
 return ifindex;
}

static int bond_fill_info(struct sk_buff *skb,
     const struct net_device *bond_dev)
{
 struct bonding *bond = netdev_priv(bond_dev);
 unsigned int packets_per_slave;
 int ifindex, i, targets_added;
 struct nlattr *targets;
 struct slave *primary;

 if (nla_put_u8(skb, IFLA_BOND_MODE, BOND_MODE(bond)))
  goto nla_put_failure;

 ifindex = bond_option_active_slave_get_ifindex(bond);
 if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_MIIMON, bond->params.miimon))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_UPDELAY,
   bond->params.updelay * bond->params.miimon))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY,
   bond->params.downdelay * bond->params.miimon))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY,
   bond->params.peer_notif_delay * bond->params.miimon))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, bond->params.use_carrier))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, bond->params.arp_interval))
  goto nla_put_failure;

 targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET);
 if (!targets)
  goto nla_put_failure;

 targets_added = 0;
 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
  if (bond->params.arp_targets[i]) {
   if (nla_put_be32(skb, i, bond->params.arp_targets[i]))
    goto nla_put_failure;
   targets_added = 1;
  }
 }

 if (targets_added)
  nla_nest_end(skb, targets);
 else
  nla_nest_cancel(skb, targets);

 if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, bond->params.arp_validate))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS,
   bond->params.arp_all_targets))
  goto nla_put_failure;

#if IS_ENABLED(CONFIG_IPV6)
 targets = nla_nest_start(skb, IFLA_BOND_NS_IP6_TARGET);
 if (!targets)
  goto nla_put_failure;

 targets_added = 0;
 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
  if (!ipv6_addr_any(&bond->params.ns_targets[i])) {
   if (nla_put_in6_addr(skb, i, &bond->params.ns_targets[i]))
    goto nla_put_failure;
   targets_added = 1;
  }
 }

 if (targets_added)
  nla_nest_end(skb, targets);
 else
  nla_nest_cancel(skb, targets);
#endif

 primary = rtnl_dereference(bond->primary_slave);
 if (primary &&
     nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT,
         bond->params.primary_reselect))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC,
         bond->params.fail_over_mac))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY,
         bond->params.xmit_policy))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP,
   bond->params.resend_igmp))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF,
         bond->params.num_peer_notif))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE,
         bond->params.all_slaves_active))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS,
   bond->params.min_links))
  goto nla_put_failure;

 if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL,
   bond->params.lp_interval))
  goto nla_put_failure;

 packets_per_slave = bond->params.packets_per_slave;
 if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE,
   packets_per_slave))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_AD_LACP_ACTIVE,
         bond->params.lacp_active))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE,
         bond->params.lacp_fast))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_AD_SELECT,
         bond->params.ad_select))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB,
         bond->params.tlb_dynamic_lb))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX,
         bond->params.missed_max))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_COUPLED_CONTROL,
         bond->params.coupled_control))
  goto nla_put_failure;

 if (nla_put_u8(skb, IFLA_BOND_BROADCAST_NEIGH,
         bond->params.broadcast_neighbor))
  goto nla_put_failure;

 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
  struct ad_info info;

  if (capable(CAP_NET_ADMIN)) {
   if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO,
     bond->params.ad_actor_sys_prio))
    goto nla_put_failure;

   if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY,
     bond->params.ad_user_port_key))
    goto nla_put_failure;

   if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM,
        ETH_ALEN, &bond->params.ad_actor_system))
    goto nla_put_failure;
  }
  if (!bond_3ad_get_active_agg_info(bond, &info)) {
   struct nlattr *nest;

   nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO);
   if (!nest)
    goto nla_put_failure;

   if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR,
     info.aggregator_id))
    goto nla_put_failure;
   if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS,
     info.ports))
    goto nla_put_failure;
   if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY,
     info.actor_key))
    goto nla_put_failure;
   if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY,
     info.partner_key))
    goto nla_put_failure;
   if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC,
        sizeof(info.partner_system),
        &info.partner_system))
    goto nla_put_failure;

   nla_nest_end(skb, nest);
  }
 }

 return 0;

nla_put_failure:
 return -EMSGSIZE;
}

static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr)
{
 switch (attr) {
 case IFLA_STATS_LINK_XSTATS:
 case IFLA_STATS_LINK_XSTATS_SLAVE:
  break;
 default:
  return 0;
 }

 return bond_3ad_stats_size() + nla_total_size(0);
}

static int bond_fill_linkxstats(struct sk_buff *skb,
    const struct net_device *dev,
    int *prividx, int attr)
{
 struct nlattr *nla __maybe_unused;
 struct slave *slave = NULL;
 struct nlattr *nest, *nest2;
 struct bonding *bond;

 switch (attr) {
 case IFLA_STATS_LINK_XSTATS:
  bond = netdev_priv(dev);
  break;
 case IFLA_STATS_LINK_XSTATS_SLAVE:
  slave = bond_slave_get_rtnl(dev);
  if (!slave)
   return 0;
  bond = slave->bond;
  break;
 default:
  return -EINVAL;
 }

 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND);
 if (!nest)
  return -EMSGSIZE;
 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
  struct bond_3ad_stats *stats;

  if (slave)
   stats = &SLAVE_AD_INFO(slave)->stats;
  else
   stats = &BOND_AD_INFO(bond).stats;

  nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD);
  if (!nest2) {
   nla_nest_end(skb, nest);
   return -EMSGSIZE;
  }

  if (bond_3ad_stats_fill(skb, stats)) {
   nla_nest_cancel(skb, nest2);
   nla_nest_end(skb, nest);
   return -EMSGSIZE;
  }
  nla_nest_end(skb, nest2);
 }
 nla_nest_end(skb, nest);

 return 0;
}

struct rtnl_link_ops bond_link_ops __read_mostly = {
 .kind   = "bond",
 .priv_size  = sizeof(struct bonding),
 .setup   = bond_setup,
 .maxtype  = IFLA_BOND_MAX,
 .policy   = bond_policy,
 .validate  = bond_validate,
 .newlink  = bond_newlink,
 .changelink  = bond_changelink,
 .get_size  = bond_get_size,
 .fill_info  = bond_fill_info,
 .get_num_tx_queues = bond_get_num_tx_queues,
 .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number
     as for TX queues */
 .fill_linkxstats        = bond_fill_linkxstats,
 .get_linkxstats_size    = bond_get_linkxstats_size,
 .slave_maxtype  = IFLA_BOND_SLAVE_MAX,
 .slave_policy  = bond_slave_policy,
 .slave_changelink = bond_slave_changelink,
 .get_slave_size  = bond_get_slave_size,
 .fill_slave_info = bond_fill_slave_info,
};

int __init bond_netlink_init(void)
{
 return rtnl_link_register(&bond_link_ops);
}

void bond_netlink_fini(void)
{
 rtnl_link_unregister(&bond_link_ops);
}

MODULE_ALIAS_RTNL_LINK("bond");