static int bond_slave_changelink(struct net_device *bond_dev,
struct net_device *slave_dev,
struct nlattr *tb[], struct nlattr *data[])
{
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);
if (err)
return err;
}
return 0;
}
/**
* bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
* @bond: target bond device
* @option: option to set
* @buf: value to set it to
*
* This function tries to acquire RTNL without blocking and if successful
* calls __bond_opt_set. It is mainly used for sysfs option manipulation.
*/
int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
{
struct bond_opt_value optval;
int ret;
if (!rtnl_trylock())
return restart_syscall();
bond_opt_initstr(&optval, buf);
ret = __bond_opt_set_notify(bond, option, &optval);
rtnl_unlock();
return ret;
}
static int bond_changelink(struct net_device *bond_dev,
struct nlattr *tb[], struct nlattr *data[])
{
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);
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);
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);
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);
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);
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);
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) {
netdev_err(bond->dev, "ARP monitoring cannot be used with MII monitoring\n");
return -EINVAL;
}
bond_opt_initval(&newval, arp_interval);
err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval);
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);
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;
}