From a15fd3612dd95341ad190def7faceebb41d6e346 Mon Sep 17 00:00:00 2001 From: Sven Eckelmann Date: Mon, 11 Feb 2013 17:10:24 +0800 Subject: [PATCH] batman-adv: Don't always delete softif when last slave was removed batman-adv has an unusual way to manage softinterfaces. These will be created automatically when a user writes to the batman-adv/mesh_iface file in sysfs and removed when no slave device exists anymore. This behaviour cannot be changed without breaking compatibility with existing code. Instead other interfaces should be able to slightly reduce this behaviour and provide a more common reaction to a removal of a slave interface. Signed-off-by: Sven Eckelmann Signed-off-by: Marek Lindner Acked-by: Antonio Quartulli Signed-off-by: Antonio Quartulli --- net/batman-adv/hard-interface.c | 8 +++++--- net/batman-adv/hard-interface.h | 13 ++++++++++++- net/batman-adv/sysfs.c | 6 ++++-- 3 files changed, 21 insertions(+), 6 deletions(-) diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c index da000e90f87f..74e3ec2fb116 100644 --- a/net/batman-adv/hard-interface.c +++ b/net/batman-adv/hard-interface.c @@ -408,7 +408,8 @@ err: return ret; } -void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface) +void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, + enum batadv_hard_if_cleanup autodel) { struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); struct batadv_hard_iface *primary_if = NULL; @@ -446,7 +447,7 @@ void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface) dev_put(hard_iface->soft_iface); /* nobody uses this interface anymore */ - if (!bat_priv->num_ifaces) + if (!bat_priv->num_ifaces && autodel == BATADV_IF_CLEANUP_AUTO) batadv_softif_destroy(hard_iface->soft_iface); hard_iface->soft_iface = NULL; @@ -533,7 +534,8 @@ static void batadv_hardif_remove_interface(struct batadv_hard_iface *hard_iface) /* first deactivate interface */ if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) - batadv_hardif_disable_interface(hard_iface); + batadv_hardif_disable_interface(hard_iface, + BATADV_IF_CLEANUP_AUTO); if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) return; diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h index 308437d52e22..49892881a7c5 100644 --- a/net/batman-adv/hard-interface.h +++ b/net/batman-adv/hard-interface.h @@ -29,13 +29,24 @@ enum batadv_hard_if_state { BATADV_IF_I_WANT_YOU, }; +/** + * enum batadv_hard_if_cleanup - Cleanup modi for soft_iface after slave removal + * @BATADV_IF_CLEANUP_KEEP: Don't automatically delete soft-interface + * @BATADV_IF_CLEANUP_AUTO: Delete soft-interface after last slave was removed + */ +enum batadv_hard_if_cleanup { + BATADV_IF_CLEANUP_KEEP, + BATADV_IF_CLEANUP_AUTO, +}; + extern struct notifier_block batadv_hard_if_notifier; struct batadv_hard_iface* batadv_hardif_get_by_netdev(const struct net_device *net_dev); int batadv_hardif_enable_interface(struct batadv_hard_iface *hard_iface, const char *iface_name); -void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface); +void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface, + enum batadv_hard_if_cleanup autodel); void batadv_hardif_remove_interfaces(void); int batadv_hardif_min_mtu(struct net_device *soft_iface); void batadv_update_min_mtu(struct net_device *soft_iface); diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c index ce39f62f751e..15a22efa9a67 100644 --- a/net/batman-adv/sysfs.c +++ b/net/batman-adv/sysfs.c @@ -588,13 +588,15 @@ static ssize_t batadv_store_mesh_iface(struct kobject *kobj, } if (status_tmp == BATADV_IF_NOT_IN_USE) { - batadv_hardif_disable_interface(hard_iface); + batadv_hardif_disable_interface(hard_iface, + BATADV_IF_CLEANUP_AUTO); goto unlock; } /* if the interface already is in use */ if (hard_iface->if_status != BATADV_IF_NOT_IN_USE) - batadv_hardif_disable_interface(hard_iface); + batadv_hardif_disable_interface(hard_iface, + BATADV_IF_CLEANUP_AUTO); ret = batadv_hardif_enable_interface(hard_iface, buff); -- 2.20.1