Exemplo n.º 1
0
int bond_option_active_slave_set(struct bonding *bond,
				 struct bond_opt_value *newval)
{
	char ifname[IFNAMSIZ] = { 0, };
	struct net_device *slave_dev;
	int ret = 0;

	sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
	if (!strlen(ifname) || newval->string[0] == '\n') {
		slave_dev = NULL;
	} else {
		slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
		if (!slave_dev)
			return -ENODEV;
	}

	if (slave_dev) {
		if (!netif_is_bond_slave(slave_dev)) {
			pr_err("Device %s is not bonding slave.\n",
			       slave_dev->name);
			return -EINVAL;
		}

		if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
			pr_err("%s: Device %s is not our slave.\n",
			       bond->dev->name, slave_dev->name);
			return -EINVAL;
		}
	}

	block_netpoll_tx();
	write_lock_bh(&bond->curr_slave_lock);

	/* check to see if we are clearing active */
	if (!slave_dev) {
		pr_info("%s: Clearing current active slave.\n",
		bond->dev->name);
		rcu_assign_pointer(bond->curr_active_slave, NULL);
		bond_select_active_slave(bond);
	} else {
		struct slave *old_active = bond->curr_active_slave;
		struct slave *new_active = bond_slave_get_rtnl(slave_dev);

		BUG_ON(!new_active);

		if (new_active == old_active) {
			/* do nothing */
			pr_info("%s: %s is already the current active slave.\n",
				bond->dev->name, new_active->dev->name);
		} else {
			if (old_active && (new_active->link == BOND_LINK_UP) &&
			    IS_UP(new_active->dev)) {
				pr_info("%s: Setting %s as active slave.\n",
					bond->dev->name, new_active->dev->name);
				bond_change_active_slave(bond, new_active);
			} else {
				pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
				       bond->dev->name, new_active->dev->name,
				       new_active->dev->name);
				ret = -EINVAL;
			}
		}
	}

	write_unlock_bh(&bond->curr_slave_lock);
	unblock_netpoll_tx();

	return ret;
}
Exemplo n.º 2
0
static int bond_option_active_slave_set(struct bonding *bond,
					const struct bond_opt_value *newval)
{
	char ifname[IFNAMSIZ] = { 0, };
	struct net_device *slave_dev;
	int ret = 0;

	sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
	if (!strlen(ifname) || newval->string[0] == '\n') {
		slave_dev = NULL;
	} else {
		slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
		if (!slave_dev)
			return -ENODEV;
	}

	if (slave_dev) {
		if (!netif_is_bond_slave(slave_dev)) {
			netdev_err(bond->dev, "Device %s is not bonding slave\n",
				   slave_dev->name);
			return -EINVAL;
		}

		if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
			netdev_err(bond->dev, "Device %s is not our slave\n",
				   slave_dev->name);
			return -EINVAL;
		}
	}

	block_netpoll_tx();
	/* check to see if we are clearing active */
	if (!slave_dev) {
		netdev_dbg(bond->dev, "Clearing current active slave\n");
		RCU_INIT_POINTER(bond->curr_active_slave, NULL);
		bond_select_active_slave(bond);
	} else {
		struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
		struct slave *new_active = bond_slave_get_rtnl(slave_dev);

		BUG_ON(!new_active);

		if (new_active == old_active) {
			/* do nothing */
			netdev_dbg(bond->dev, "%s is already the current active slave\n",
				   new_active->dev->name);
		} else {
			if (old_active && (new_active->link == BOND_LINK_UP) &&
			    bond_slave_is_up(new_active)) {
				netdev_dbg(bond->dev, "Setting %s as active slave\n",
					   new_active->dev->name);
				bond_change_active_slave(bond, new_active);
			} else {
				netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
					   new_active->dev->name,
					   new_active->dev->name);
				ret = -EINVAL;
			}
		}
	}
	unblock_netpoll_tx();

	return ret;
}
Exemplo n.º 3
0
int bond_option_active_slave_set(struct bonding *bond,
                                 struct net_device *slave_dev)
{
    int ret = 0;

    if (slave_dev) {
        if (!netif_is_bond_slave(slave_dev)) {
            pr_err("Device %s is not bonding slave.\n",
                   slave_dev->name);
            return -EINVAL;
        }

        if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
            pr_err("%s: Device %s is not our slave.\n",
                   bond->dev->name, slave_dev->name);
            return -EINVAL;
        }
    }

    if (!USES_PRIMARY(bond->params.mode)) {
        pr_err("%s: Unable to change active slave; %s is in mode %d\n",
               bond->dev->name, bond->dev->name, bond->params.mode);
        return -EINVAL;
    }

    block_netpoll_tx();
    read_lock(&bond->lock);
    write_lock_bh(&bond->curr_slave_lock);

    /* check to see if we are clearing active */
    if (!slave_dev) {
        pr_info("%s: Clearing current active slave.\n",
                bond->dev->name);
        rcu_assign_pointer(bond->curr_active_slave, NULL);
        bond_select_active_slave(bond);
    } else {
        struct slave *old_active = bond->curr_active_slave;
        struct slave *new_active = bond_slave_get_rtnl(slave_dev);

        BUG_ON(!new_active);

        if (new_active == old_active) {
            /* do nothing */
            pr_info("%s: %s is already the current active slave.\n",
                    bond->dev->name, new_active->dev->name);
        } else {
            if (old_active && (new_active->link == BOND_LINK_UP) &&
                    IS_UP(new_active->dev)) {
                pr_info("%s: Setting %s as active slave.\n",
                        bond->dev->name, new_active->dev->name);
                bond_change_active_slave(bond, new_active);
            } else {
                pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
                       bond->dev->name, new_active->dev->name,
                       new_active->dev->name);
                ret = -EINVAL;
            }
        }
    }

    write_unlock_bh(&bond->curr_slave_lock);
    read_unlock(&bond->lock);
    unblock_netpoll_tx();
    return ret;
}