Commit b5878a2d authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: enhance tracing 



Enhance tracing by adding tracing for a variety of
callbacks that the drivers call, and also for
internal calls (currently limited to queue status).
This can aid debugging what is going on in mac80211
in interaction with drivers, since we can now see
what drivers call and not just what mac80211 calls
in the driver.

Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 403820ed

net/mac80211/Kconfig

+4 −4
Original line number Diff line number Diff line
@@ -221,8 +221,8 @@ config MAC80211_DRIVER_API_TRACER 
	depends on EVENT_TRACING

	help

	  Say Y here to make mac80211 register with the ftrace

	  framework for the driver API -- you can see which

	  driver methods it is calling then by looking at the

	  trace.

	  framework for the driver API -- you can then see which

	  driver methods it is calling and which API functions

	  drivers are calling by looking at the trace.



	  If unsure, say N.
 
	  If unsure, say Y.

net/mac80211/agg-tx.c

+8 −0
Original line number Diff line number Diff line
@@ -214,6 +214,8 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) 
	int ret = 0;

	u16 start_seq_num;



	trace_api_start_tx_ba_session(pubsta, tid);



	if (WARN_ON(!local->ops->ampdu_action))

		return -EINVAL;
@@ -440,6 +442,8 @@ void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid) 
	struct sta_info *sta;

	u8 *state;



	trace_api_start_tx_ba_cb(sdata, ra, tid);



	if (tid >= STA_TID_NUM) {

#ifdef CONFIG_MAC80211_HT_DEBUG

		printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
@@ -541,6 +545,8 @@ int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, 
	struct ieee80211_sub_if_data *sdata = sta->sdata;

	struct ieee80211_local *local = sdata->local;



	trace_api_stop_tx_ba_session(pubsta, tid, initiator);



	if (!local->ops->ampdu_action)

		return -EINVAL;
@@ -558,6 +564,8 @@ void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid) 
	struct sta_info *sta;

	u8 *state;



	trace_api_stop_tx_ba_cb(sdata, ra, tid);



	if (tid >= STA_TID_NUM) {

#ifdef CONFIG_MAC80211_HT_DEBUG

		printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",

net/mac80211/driver-trace.h

+275 −0
Original line number Diff line number Diff line
@@ -32,6 +32,10 @@ static inline void trace_ ## name(proto) {} 
#define VIF_PR_FMT	" vif:%s(%d)"

#define VIF_PR_ARG	__get_str(vif_name), __entry->vif_type



/*

 * Tracing for driver callbacks.

 */



TRACE_EVENT(drv_start,

	TP_PROTO(struct ieee80211_local *local, int ret),
@@ -766,6 +770,277 @@ TRACE_EVENT(drv_flush, 
		LOCAL_PR_ARG, __entry->drop

	)

);



/*

 * Tracing for API calls that drivers call.

 */



TRACE_EVENT(api_start_tx_ba_session,

	TP_PROTO(struct ieee80211_sta *sta, u16 tid),



	TP_ARGS(sta, tid),



	TP_STRUCT__entry(

		STA_ENTRY

		__field(u16, tid)

	),



	TP_fast_assign(

		STA_ASSIGN;

		__entry->tid = tid;

	),



	TP_printk(

		STA_PR_FMT " tid:%d",

		STA_PR_ARG, __entry->tid

	)

);



TRACE_EVENT(api_start_tx_ba_cb,

	TP_PROTO(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid),



	TP_ARGS(sdata, ra, tid),



	TP_STRUCT__entry(

		VIF_ENTRY

		__array(u8, ra, ETH_ALEN)

		__field(u16, tid)

	),



	TP_fast_assign(

		VIF_ASSIGN;

		memcpy(__entry->ra, ra, ETH_ALEN);

		__entry->tid = tid;

	),



	TP_printk(

		VIF_PR_FMT " ra:%pM tid:%d",

		VIF_PR_ARG, __entry->ra, __entry->tid

	)

);



TRACE_EVENT(api_stop_tx_ba_session,

	TP_PROTO(struct ieee80211_sta *sta, u16 tid, u16 initiator),



	TP_ARGS(sta, tid, initiator),



	TP_STRUCT__entry(

		STA_ENTRY

		__field(u16, tid)

		__field(u16, initiator)

	),



	TP_fast_assign(

		STA_ASSIGN;

		__entry->tid = tid;

		__entry->initiator = initiator;

	),



	TP_printk(

		STA_PR_FMT " tid:%d initiator:%d",

		STA_PR_ARG, __entry->tid, __entry->initiator

	)

);



TRACE_EVENT(api_stop_tx_ba_cb,

	TP_PROTO(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid),



	TP_ARGS(sdata, ra, tid),



	TP_STRUCT__entry(

		VIF_ENTRY

		__array(u8, ra, ETH_ALEN)

		__field(u16, tid)

	),



	TP_fast_assign(

		VIF_ASSIGN;

		memcpy(__entry->ra, ra, ETH_ALEN);

		__entry->tid = tid;

	),



	TP_printk(

		VIF_PR_FMT " ra:%pM tid:%d",

		VIF_PR_ARG, __entry->ra, __entry->tid

	)

);



TRACE_EVENT(api_restart_hw,

	TP_PROTO(struct ieee80211_local *local),



	TP_ARGS(local),



	TP_STRUCT__entry(

		LOCAL_ENTRY

	),



	TP_fast_assign(

		LOCAL_ASSIGN;

	),



	TP_printk(

		LOCAL_PR_FMT,

		LOCAL_PR_ARG

	)

);



TRACE_EVENT(api_beacon_loss,

	TP_PROTO(struct ieee80211_sub_if_data *sdata),



	TP_ARGS(sdata),



	TP_STRUCT__entry(

		VIF_ENTRY

	),



	TP_fast_assign(

		VIF_ASSIGN;

	),



	TP_printk(

		VIF_PR_FMT,

		VIF_PR_ARG

	)

);



TRACE_EVENT(api_connection_loss,

	TP_PROTO(struct ieee80211_sub_if_data *sdata),



	TP_ARGS(sdata),



	TP_STRUCT__entry(

		VIF_ENTRY

	),



	TP_fast_assign(

		VIF_ASSIGN;

	),



	TP_printk(

		VIF_PR_FMT,

		VIF_PR_ARG

	)

);



TRACE_EVENT(api_cqm_rssi_notify,

	TP_PROTO(struct ieee80211_sub_if_data *sdata,

		 enum nl80211_cqm_rssi_threshold_event rssi_event),



	TP_ARGS(sdata, rssi_event),



	TP_STRUCT__entry(

		VIF_ENTRY

		__field(u32, rssi_event)

	),



	TP_fast_assign(

		VIF_ASSIGN;

		__entry->rssi_event = rssi_event;

	),



	TP_printk(

		VIF_PR_FMT " event:%d",

		VIF_PR_ARG, __entry->rssi_event

	)

);



TRACE_EVENT(api_scan_completed,

	TP_PROTO(struct ieee80211_local *local, bool aborted),



	TP_ARGS(local, aborted),



	TP_STRUCT__entry(

		LOCAL_ENTRY

		__field(bool, aborted)

	),



	TP_fast_assign(

		LOCAL_ASSIGN;

		__entry->aborted = aborted;

	),



	TP_printk(

		LOCAL_PR_FMT " aborted:%d",

		LOCAL_PR_ARG, __entry->aborted

	)

);



TRACE_EVENT(api_sta_block_awake,

	TP_PROTO(struct ieee80211_local *local,

		 struct ieee80211_sta *sta, bool block),



	TP_ARGS(local, sta, block),



	TP_STRUCT__entry(

		LOCAL_ENTRY

		STA_ENTRY

		__field(bool, block)

	),



	TP_fast_assign(

		LOCAL_ASSIGN;

		STA_ASSIGN;

		__entry->block = block;

	),



	TP_printk(

		LOCAL_PR_FMT STA_PR_FMT " block:%d",

		LOCAL_PR_ARG, STA_PR_FMT, __entry->block

	)

);



/*

 * Tracing for internal functions

 * (which may also be called in response to driver calls)

 */



TRACE_EVENT(wake_queue,

	TP_PROTO(struct ieee80211_local *local, u16 queue,

		 enum queue_stop_reason reason),



	TP_ARGS(local, queue, reason),



	TP_STRUCT__entry(

		LOCAL_ENTRY

		__field(u16, queue)

		__field(u32, reason)

	),



	TP_fast_assign(

		LOCAL_ASSIGN;

		__entry->queue = queue;

		__entry->reason = reason;

	),



	TP_printk(

		LOCAL_PR_FMT " queue:%d, reason:%d",

		LOCAL_PR_ARG, __entry->queue, __entry->reason

	)

);



TRACE_EVENT(stop_queue,

	TP_PROTO(struct ieee80211_local *local, u16 queue,

		 enum queue_stop_reason reason),



	TP_ARGS(local, queue, reason),



	TP_STRUCT__entry(

		LOCAL_ENTRY

		__field(u16, queue)

		__field(u32, reason)

	),



	TP_fast_assign(

		LOCAL_ASSIGN;

		__entry->queue = queue;

		__entry->reason = reason;

	),



	TP_printk(

		LOCAL_PR_FMT " queue:%d, reason:%d",

		LOCAL_PR_ARG, __entry->queue, __entry->reason

	)

);

#endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */



#undef TRACE_INCLUDE_PATH

net/mac80211/main.c

+2 −0
Original line number Diff line number Diff line
@@ -309,6 +309,8 @@ void ieee80211_restart_hw(struct ieee80211_hw *hw) 
{

	struct ieee80211_local *local = hw_to_local(hw);



	trace_api_restart_hw(local);



	/* use this reason, __ieee80211_resume will unblock it */

	ieee80211_stop_queues_by_reason(hw,

		IEEE80211_QUEUE_STOP_REASON_SUSPEND);

net/mac80211/mlme.c

+6 −0
Original line number Diff line number Diff line
@@ -1007,6 +1007,8 @@ void ieee80211_beacon_loss(struct ieee80211_vif *vif) 
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	struct ieee80211_hw *hw = &sdata->local->hw;



	trace_api_beacon_loss(sdata);



	WARN_ON(hw->flags & IEEE80211_HW_CONNECTION_MONITOR);

	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);

}
@@ -1017,6 +1019,8 @@ void ieee80211_connection_loss(struct ieee80211_vif *vif) 
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	struct ieee80211_hw *hw = &sdata->local->hw;



	trace_api_connection_loss(sdata);



	WARN_ON(!(hw->flags & IEEE80211_HW_CONNECTION_MONITOR));

	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);

}
@@ -2261,6 +2265,8 @@ void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 
{

	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);



	trace_api_cqm_rssi_notify(sdata, rssi_event);



	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);

}

EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);

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