From e687f61eedab8895e5669cb82cebe0253631cd8c Mon Sep 17 00:00:00 2001 From: Antonio Quartulli Date: Sun, 12 Aug 2012 18:24:55 +0200 Subject: [PATCH] mac80211: add supported rates change notification in IBSS In IBSS it is possible that the supported rates set for a station changes over time (e.g. it gets first initialised as an empty set because of no available information about rates and updated later). In this case the driver has to be notified about the change in order to update its internal table accordingly (if needed). This behaviour is needed by all those drivers that handle rc internally but leave stations management to mac80211 Reported-by: Gui Iribarren Signed-off-by: Antonio Quartulli [Johannes - add docs, validate IBSS mode only, fix compilation] Signed-off-by: Johannes Berg --- include/net/mac80211.h | 4 ++++ net/mac80211/driver-ops.h | 3 +++ net/mac80211/ibss.c | 5 ++++- 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 8114f59..d9cef31 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1897,10 +1897,14 @@ enum ieee80211_frame_release_type { * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit * to this station changed. * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. + * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer + * changed (in IBSS mode) due to discovering more information about + * the peer. */ enum ieee80211_rate_control_changed { IEEE80211_RC_BW_CHANGED = BIT(0), IEEE80211_RC_SMPS_CHANGED = BIT(1), + IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), }; /** diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index a81117a..a81154d 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -528,6 +528,9 @@ static inline void drv_sta_rc_update(struct ieee80211_local *local, sdata = get_bss_sdata(sdata); check_sdata_in_driver(sdata); + WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED && + sdata->vif.type != NL80211_IFTYPE_ADHOC); + trace_drv_sta_rc_update(local, sdata, sta, changed); if (local->ops->sta_rc_update) local->ops->sta_rc_update(&local->hw, &sdata->vif, diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 1ebda2f..a9d9328 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -459,8 +459,11 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, } } - if (sta && rates_updated) + if (sta && rates_updated) { + drv_sta_rc_update(local, sdata, &sta->sta, + IEEE80211_RC_SUPP_RATES_CHANGED); rate_control_rate_init(sta); + } rcu_read_unlock(); } -- 2.7.4