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mac80211: add supported rates change notification in IBSS

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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 <gui@altermundi.net>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
[Johannes - add docs, validate IBSS mode only, fix compilation]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Antonio Quartulli 2012-08-12 18:24:55 +02:00 committed by Johannes Berg
parent 4bd4c2dd8e
commit e687f61eed
3 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/net/mac80211.h
View File

@ -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),
};
/**

3
net/mac80211/driver-ops.h
View File

@ -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,

5
net/mac80211/ibss.c
View File

@ -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();
}