The current mechanism to detect hot-plug / unplug of wireless devices is somewhat arcane. One has to listen to NEW_WIPHY/DEL_WIPHY events over nl80211 as well as RTM_NEWLINK / RTM_DELLINK events over rtnl, then somehow find a correlation between these events. This involves userspace sending GET_INTERFACE or GET_WIPHY commands to the kernel, which incurs additional roundtrips. This patch series proposes that NEW_INTERFACE and DEL_INTERFACE events are always emitted, regardless of whether a netdev was added/removed by the driver or explicitly via NEW_INTERFACE/DEL_INTERFACE commands. One side effect of this approach is that multiple NEW_INTERFACE/DEL_INTERFACE events might be generated for P2P interfaces. Once when a wdev is created or destroyed, and once when the associated p2p netdev is connecte or disconnected. It is likely that only the caller of P2P oriented NEW_INTERFACE / DEL_INTERFACE commands is interested in the status of these operations. E.g. the caller is / should be using SOCKET_OWNER attribute. Thus one possibility is to not emit NEW_INTERFACE/DEL_INTERFACE events in such cases. Denis Kenzior (5): nl80211: Add nl80211_notify_iface core: Notify of new wireless netdevs nl80211: Emit NEW_INTERFACE only in special cases core: Notify when wireless netdev is removed nl80211: Emit DEL_INTERFACE only in special cases net/wireless/core.c | 4 ++++ net/wireless/nl80211.c | 63 ++++++++++++++++++++++++++++++++++++++------------ net/wireless/nl80211.h | 3 +++ 3 files changed, 55 insertions(+), 15 deletions(-) -- 2.7.3 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
