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mac80211: add sta_state callback

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(based on Eliad's patch)

Add a callback to notify the low-level driver whenever
the state of a station changes. The driver is only
notified when the station is actually in the mac80211
hash table, not for pre-insert state transitions.

To allow the driver to replace sta_add/remove calls
with this, call extra transitions with the NOTEXIST
state.

This callback can fail, so we need to be careful in
handling it when a station is inserted, particularly
in the IBSS case where we still keep the station entry
around for mac80211 purposes.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2012-01-20 13:55:21 +01:00
committed by John W. Linville
parent 71ec375c75
commit f09603a259
8 changed files with 202 additions and 36 deletions
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22
net/mac80211/driver-ops.h
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@@ -478,6 +478,28 @@ static inline void drv_sta_remove(struct ieee80211_local *local,
trace_drv_return_void(local);
}
static inline __must_check
int drv_sta_state(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
enum ieee80211_sta_state old_state,
enum ieee80211_sta_state new_state)
{
int ret = 0;
might_sleep();
sdata = get_bss_sdata(sdata);
check_sdata_in_driver(sdata);
trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
if (local->ops->sta_state)
ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
old_state, new_state);
trace_drv_return_int(local, ret);
return ret;
}
static inline int drv_conf_tx(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata, u16 queue,
const struct ieee80211_tx_queue_params *params)