From: Sven Eckelmann <[email protected]> The sysfs configuration interface of batman-adv to add/remove slaves of an soft-iface is not deadlock free and doesn't follow the currently common way to modify slaves of an interface.
An additional configuration interface though rtnl_link is introduced which provides easy device adding/removing with tools like "ip": $ ip link set dev eth0 master bat0 $ ip link set dev eth0 nomaster Signed-off-by: Sven Eckelmann <[email protected]> --- soft-interface.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/soft-interface.c b/soft-interface.c index d9f27d5..ac34c55 100644 --- a/soft-interface.c +++ b/soft-interface.c @@ -506,6 +506,41 @@ free_bat_counters: return ret; } +/** + * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface + * @dev: batadv_soft_interface used as master interface + * @slave_dev: net_device which should become the slave interface + */ +static int batadv_softif_slave_add(struct net_device *dev, + struct net_device *slave_dev) +{ + struct batadv_hard_iface *hard_iface; + + hard_iface = batadv_hardif_get_by_netdev(slave_dev); + if (!hard_iface || hard_iface->soft_iface != NULL) + return -EINVAL; + + return batadv_hardif_enable_interface(hard_iface, dev->name); +} + +/** + * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface + * @dev: batadv_soft_interface used as master interface + * @slave_dev: net_device which should be removed from the master interface + */ +static int batadv_softif_slave_del(struct net_device *dev, + struct net_device *slave_dev) +{ + struct batadv_hard_iface *hard_iface; + + hard_iface = batadv_hardif_get_by_netdev(slave_dev); + if (!hard_iface || hard_iface->soft_iface != dev) + return -EINVAL; + + batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP); + return 0; +} + static const struct net_device_ops batadv_netdev_ops = { .ndo_init = batadv_softif_init_late, .ndo_open = batadv_interface_open, @@ -514,7 +549,9 @@ static const struct net_device_ops batadv_netdev_ops = { .ndo_set_mac_address = batadv_interface_set_mac_addr, .ndo_change_mtu = batadv_interface_change_mtu, .ndo_start_xmit = batadv_interface_tx, - .ndo_validate_addr = eth_validate_addr + .ndo_validate_addr = eth_validate_addr, + .ndo_add_slave = batadv_softif_slave_add, + .ndo_del_slave = batadv_softif_slave_del, }; /** -- 1.7.10.4
