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wifi: mac80211: add flush_sta method

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Some drivers like iwlwifi might have per-STA queues, so we
may want to flush/drop just those queues rather than all
when removing a station. Add a separate method for that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2023-03-31 16:59:17 +02:00
parent 0b75a1b1e4
commit d00800a289
4 changed files with 34 additions and 2 deletions
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6
include/net/mac80211.h
View File

@ -3950,6 +3950,10 @@ struct ieee80211_prep_tx_info {
* Note that vif can be NULL.
* The callback can sleep.
*
* @flush_sta: Flush or drop all pending frames from the hardware queue(s) for
* the given station, as it's about to be removed.
* The callback can sleep.
*
* @channel_switch: Drivers that need (or want) to offload the channel
* switch operation for CSAs received from the AP may implement this
* callback. They must then call ieee80211_chswitch_done() to indicate
@ -4415,6 +4419,8 @@ struct ieee80211_ops {
#endif
void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop);
void (*flush_sta)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
void (*channel_switch)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *ch_switch);

15
net/mac80211/driver-ops.h
View File

@ -649,6 +649,21 @@ static inline void drv_flush(struct ieee80211_local *local,
trace_drv_return_void(local);
}
static inline void drv_flush_sta(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct sta_info *sta)
{
might_sleep();
if (sdata && !check_sdata_in_driver(sdata))
return;
trace_drv_flush_sta(local, sdata, &sta->sta);
if (local->ops->flush_sta)
local->ops->flush_sta(&local->hw, &sdata->vif, &sta->sta);
trace_drv_return_void(local);
}
static inline void drv_channel_switch(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct ieee80211_channel_switch *ch_switch)

8
net/mac80211/sta_info.c
View File

@ -1299,8 +1299,12 @@ static void __sta_info_destroy_part2(struct sta_info *sta)
* frames sitting on hardware queues might be sent out without
* any encryption at all.
*/
if (local->ops->set_key)
ieee80211_flush_queues(local, sta->sdata, false);
if (local->ops->set_key) {
if (local->ops->flush_sta)
drv_flush_sta(local, sta->sdata, sta);
else
ieee80211_flush_queues(local, sta->sdata, false);
}
/* now keys can no longer be reached */
ieee80211_free_sta_keys(local, sta);

7
net/mac80211/trace.h
View File

@ -1177,6 +1177,13 @@ TRACE_EVENT(drv_flush,
)
);
DEFINE_EVENT(sta_event, drv_flush_sta,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct ieee80211_sta *sta),
TP_ARGS(local, sdata, sta)
);
TRACE_EVENT(drv_channel_switch,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,