From 5de17984898c5758fc6ebe08eccea9f4b6548914 Mon Sep 17 00:00:00 2001 From: Arend van Spriel Date: Thu, 18 Apr 2013 15:49:00 +0200 Subject: cfg80211: introduce critical protocol indication from user-space Some protocols need a more reliable connection to complete successful in reasonable time. This patch adds a user-space API to indicate the wireless driver that a critical protocol is about to commence and when it is done, using nl80211 primitives NL80211_CMD_CRIT_PROTOCOL_START and NL80211_CRIT_PROTOCOL_STOP. There can be only on critical protocol session started per registered cfg80211 device. The driver can support this by implementing the cfg80211 callbacks .crit_proto_start() and .crit_proto_stop(). Examples of protocols that can benefit from this are DHCP, EAPOL, APIPA. Exactly how the link can/should be made more reliable is up to the driver. Things to consider are avoid scanning, no multi-channel operations, and alter coexistence schemes. Reviewed-by: Pieter-Paul Giesberts Reviewed-by: Franky (Zhenhui) Lin Signed-off-by: Arend van Spriel Signed-off-by: Johannes Berg --- net/wireless/core.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/wireless/core.h') diff --git a/net/wireless/core.h b/net/wireless/core.h index 124e5e773fbc..fd35dae547c4 100644 --- a/net/wireless/core.h +++ b/net/wireless/core.h @@ -88,6 +88,9 @@ struct cfg80211_registered_device { struct delayed_work dfs_update_channels_wk; + /* netlink port which started critical protocol (0 means not started) */ + u32 crit_proto_nlportid; + /* must be last because of the way we do wiphy_priv(), * and it should at least be aligned to NETDEV_ALIGN */ struct wiphy wiphy __aligned(NETDEV_ALIGN); -- cgit