cfg80211: add request id to cfg80211_sched_scan_*() api

Have proper request id filled in the SCHED_SCAN_RESULTS and SCHED_SCAN_STOPPED notifications toward user-space by having the driver provide it through the api. Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com> Reviewed-by: Franky Lin <franky.lin@broadcom.com> Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-04-28 13:40:28 +01:00 · 2017-04-28 13:40:28 +01:00 · b34939b983
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@ -169,7 +169,7 @@ static void ath6kl_cfg80211_sscan_disable(struct ath6kl_vif *vif)
 	if (!stopped)
 		return;

-	cfg80211_sched_scan_stopped(ar->wiphy);
+	cfg80211_sched_scan_stopped(ar->wiphy, 0);
 }

 static int ath6kl_set_wpa_version(struct ath6kl_vif *vif,
--- a/drivers/net/wireless/ath/ath6kl/wmi.c
+++ b/drivers/net/wireless/ath/ath6kl/wmi.c
@ -1082,7 +1082,7 @@ void ath6kl_wmi_sscan_timer(unsigned long ptr)
 {
 	struct ath6kl_vif *vif = (struct ath6kl_vif *) ptr;

-	cfg80211_sched_scan_results(vif->ar->wiphy);
+	cfg80211_sched_scan_results(vif->ar->wiphy, 0);
 }

 static int ath6kl_wmi_bssinfo_event_rx(struct wmi *wmi, u8 *datap, int len,
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@ -762,7 +762,7 @@ s32 brcmf_notify_escan_complete(struct brcmf_cfg80211_info *cfg,
 		brcmf_dbg(SCAN, "scheduled scan completed\n");
 		cfg->internal_escan = false;
 		if (!aborted)
-			cfg80211_sched_scan_results(cfg_to_wiphy(cfg));
+			cfg80211_sched_scan_results(cfg_to_wiphy(cfg), 0);
 	} else if (scan_request) {
 		struct cfg80211_scan_info info = {
 			.aborted = aborted,
@ -3372,7 +3372,7 @@ brcmf_notify_sched_scan_results(struct brcmf_if *ifp,
 		goto free_req;

 out_err:
-	cfg80211_sched_scan_stopped(wiphy);
+	cfg80211_sched_scan_stopped(wiphy, 0);
 free_req:
 	kfree(request);
 	return err;
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@ -2053,7 +2053,7 @@ mwifiex_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *dev,
 	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

 	if (!mwifiex_stop_bg_scan(priv))
-		cfg80211_sched_scan_stopped_rtnl(priv->wdev.wiphy);
+		cfg80211_sched_scan_stopped_rtnl(priv->wdev.wiphy, 0);

 	if (mwifiex_deauthenticate(priv, NULL))
 		return -EFAULT;
@ -2321,7 +2321,7 @@ mwifiex_cfg80211_connect(struct wiphy *wiphy, struct net_device *dev,
 		    (int)sme->ssid_len, (char *)sme->ssid, sme->bssid);

 	if (!mwifiex_stop_bg_scan(priv))
-		cfg80211_sched_scan_stopped_rtnl(priv->wdev.wiphy);
+		cfg80211_sched_scan_stopped_rtnl(priv->wdev.wiphy, 0);

 	ret = mwifiex_cfg80211_assoc(priv, sme->ssid_len, sme->ssid, sme->bssid,
 				     priv->bss_mode, sme->channel, sme, 0);
@ -2530,7 +2530,7 @@ mwifiex_cfg80211_scan(struct wiphy *wiphy,
 		priv->scan_block = false;

 	if (!mwifiex_stop_bg_scan(priv))
-		cfg80211_sched_scan_stopped_rtnl(priv->wdev.wiphy);
+		cfg80211_sched_scan_stopped_rtnl(priv->wdev.wiphy, 0);

 	user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);
 	if (!user_scan_cfg)
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@ -748,7 +748,7 @@ mwifiex_close(struct net_device *dev)
 		mwifiex_dbg(priv->adapter, INFO,
 			    "aborting bgscan on ndo_stop\n");
 		mwifiex_stop_bg_scan(priv);
-		cfg80211_sched_scan_stopped(priv->wdev.wiphy);
+		cfg80211_sched_scan_stopped(priv->wdev.wiphy, 0);
 	}

 	return 0;
--- a/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_cmdresp.c
@ -1201,7 +1201,7 @@ int mwifiex_process_sta_cmdresp(struct mwifiex_private *priv, u16 cmdresp_no,
 		break;
 	case HostCmd_CMD_802_11_BG_SCAN_QUERY:
 		ret = mwifiex_ret_802_11_scan(priv, resp);
-		cfg80211_sched_scan_results(priv->wdev.wiphy);
+		cfg80211_sched_scan_results(priv->wdev.wiphy, 0);
 		mwifiex_dbg(adapter, CMD,
 			    "info: CMD_RESP: BG_SCAN result is ready!\n");
 		break;
--- a/drivers/net/wireless/marvell/mwifiex/sta_event.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_event.c
@ -793,7 +793,7 @@ int mwifiex_process_sta_event(struct mwifiex_private *priv)

 	case EVENT_BG_SCAN_STOPPED:
 		dev_dbg(adapter->dev, "event: BGS_STOPPED\n");
-		cfg80211_sched_scan_stopped(priv->wdev.wiphy);
+		cfg80211_sched_scan_stopped(priv->wdev.wiphy, 0);
 		if (priv->sched_scanning)
 			priv->sched_scanning = false;
 		break;
--- a/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/marvell/mwifiex/sta_ioctl.c
@ -560,7 +560,7 @@ int mwifiex_enable_hs(struct mwifiex_adapter *adapter)
 #endif
 			mwifiex_dbg(adapter, CMD, "aborting bgscan!\n");
 			mwifiex_stop_bg_scan(priv);
-			cfg80211_sched_scan_stopped(priv->wdev.wiphy);
+			cfg80211_sched_scan_stopped(priv->wdev.wiphy, 0);
 #ifdef CONFIG_PM
 		}
 #endif
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@ -1666,6 +1666,7 @@ struct cfg80211_bss_select_adjust {
 * 	(others are filtered out).
 *	If ommited, all results are passed.
 * @n_match_sets: number of match sets
+ * @results_wk: worker for processing results notification.
 * @wiphy: the wiphy this was for
 * @dev: the interface
 * @scan_start: start time of the scheduled scan
@ -1726,6 +1727,7 @@ struct cfg80211_sched_scan_request {
 	struct wiphy *wiphy;
 	struct net_device *dev;
 	unsigned long scan_start;
+	bool report_results;
 	struct rcu_head rcu_head;
 	u32 owner_nlportid;
 	bool nl_owner_dead;
@ -4564,31 +4566,34 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request,
 * cfg80211_sched_scan_results - notify that new scan results are available
 *
 * @wiphy: the wiphy which got scheduled scan results
+ * @reqid: identifier for the related scheduled scan request
 */
-void cfg80211_sched_scan_results(struct wiphy *wiphy);
+void cfg80211_sched_scan_results(struct wiphy *wiphy, u64 reqid);

 /**
 * cfg80211_sched_scan_stopped - notify that the scheduled scan has stopped
 *
 * @wiphy: the wiphy on which the scheduled scan stopped
+ * @reqid: identifier for the related scheduled scan request
 *
 * The driver can call this function to inform cfg80211 that the
 * scheduled scan had to be stopped, for whatever reason.  The driver
 * is then called back via the sched_scan_stop operation when done.
 */
-void cfg80211_sched_scan_stopped(struct wiphy *wiphy);
+void cfg80211_sched_scan_stopped(struct wiphy *wiphy, u64 reqid);

 /**
 * cfg80211_sched_scan_stopped_rtnl - notify that the scheduled scan has stopped
 *
 * @wiphy: the wiphy on which the scheduled scan stopped
+ * @reqid: identifier for the related scheduled scan request
 *
 * The driver can call this function to inform cfg80211 that the
 * scheduled scan had to be stopped, for whatever reason.  The driver
 * is then called back via the sched_scan_stop operation when done.
 * This function should be called with rtnl locked.
 */
-void cfg80211_sched_scan_stopped_rtnl(struct wiphy *wiphy);
+void cfg80211_sched_scan_stopped_rtnl(struct wiphy *wiphy, u64 reqid);

 /**
 * cfg80211_inform_bss_frame_data - inform cfg80211 of a received BSS frame
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@ -10,7 +10,7 @@ static void ieee80211_sched_scan_cancel(struct ieee80211_local *local)
 {
 	if (ieee80211_request_sched_scan_stop(local))
 		return;
-	cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
+	cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
 }

 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@ -1219,7 +1219,7 @@ void ieee80211_sched_scan_results(struct ieee80211_hw *hw)

 	trace_api_sched_scan_results(local);

-	cfg80211_sched_scan_results(hw->wiphy);
+	cfg80211_sched_scan_results(hw->wiphy, 0);
 }
 EXPORT_SYMBOL(ieee80211_sched_scan_results);

@ -1239,7 +1239,7 @@ void ieee80211_sched_scan_end(struct ieee80211_local *local)

 	mutex_unlock(&local->mtx);

-	cfg80211_sched_scan_stopped(local->hw.wiphy);
+	cfg80211_sched_scan_stopped(local->hw.wiphy, 0);
 }

 void ieee80211_sched_scan_stopped_work(struct work_struct *work)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@ -2112,7 +2112,7 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 	mutex_unlock(&local->mtx);

 	if (sched_scan_stopped)
-		cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
+		cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);

 wake_up:
 	if (local->in_reconfig) {
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@ -456,7 +456,6 @@ use_default_name:
 	INIT_LIST_HEAD(&rdev->bss_list);
 	INIT_LIST_HEAD(&rdev->sched_scan_req_list);
 	INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
-	INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
 	INIT_LIST_HEAD(&rdev->mlme_unreg);
 	spin_lock_init(&rdev->mlme_unreg_lock);
 	INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
@ -473,6 +472,7 @@ use_default_name:

 	INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
 	INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
+	INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
 	INIT_WORK(&rdev->propagate_radar_detect_wk,
 		  cfg80211_propagate_radar_detect_wk);
 	INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@ -77,7 +77,6 @@ struct cfg80211_registered_device {
 	struct list_head sched_scan_req_list;
 	unsigned long suspend_at;
 	struct work_struct scan_done_wk;
-	struct work_struct sched_scan_results_wk;

 	struct genl_info *cur_cmd_info;

@ -93,6 +92,7 @@ struct cfg80211_registered_device {

 	struct work_struct destroy_work;
 	struct work_struct sched_scan_stop_wk;
+	struct work_struct sched_scan_res_wk;

 	struct cfg80211_chan_def radar_chandef;
 	struct work_struct propagate_radar_detect_wk;
@ -412,7 +412,7 @@ void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
 				 struct cfg80211_sched_scan_request *req);
 int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
 				     bool want_multi);
-void __cfg80211_sched_scan_results(struct work_struct *wk);
+void cfg80211_sched_scan_results_wk(struct work_struct *work);
 int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev,
 				 struct cfg80211_sched_scan_request *req,
 				 bool driver_initiated);
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@ -328,7 +328,7 @@ cfg80211_find_sched_scan_req(struct cfg80211_registered_device *rdev, u64 reqid)
 		if (pos->reqid == reqid)
 			return pos;
 	}
-	return ERR_PTR(-ENOENT);
+	return NULL;
 }

 /*
@ -364,67 +364,66 @@ int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev,
 	return 0;
 }

-void __cfg80211_sched_scan_results(struct work_struct *wk)
+void cfg80211_sched_scan_results_wk(struct work_struct *work)
 {
 	struct cfg80211_registered_device *rdev;
-	struct cfg80211_sched_scan_request *request;
+	struct cfg80211_sched_scan_request *req, *tmp;

-	rdev = container_of(wk, struct cfg80211_registered_device,
-			    sched_scan_results_wk);
+	rdev = container_of(work, struct cfg80211_registered_device,
+			   sched_scan_res_wk);

 	rtnl_lock();
-
-	request = cfg80211_find_sched_scan_req(rdev, 0);
-
-	/* we don't have sched_scan_req anymore if the scan is stopping */
-	if (!IS_ERR(request)) {
-		if (request->flags & NL80211_SCAN_FLAG_FLUSH) {
-			/* flush entries from previous scans */
-			spin_lock_bh(&rdev->bss_lock);
-			__cfg80211_bss_expire(rdev, request->scan_start);
-			spin_unlock_bh(&rdev->bss_lock);
-			request->scan_start = jiffies;
+	list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
+		if (req->report_results) {
+			req->report_results = false;
+			if (req->flags & NL80211_SCAN_FLAG_FLUSH) {
+				/* flush entries from previous scans */
+				spin_lock_bh(&rdev->bss_lock);
+				__cfg80211_bss_expire(rdev, req->scan_start);
+				spin_unlock_bh(&rdev->bss_lock);
+				req->scan_start = jiffies;
+			}
+			nl80211_send_sched_scan(req,
+						NL80211_CMD_SCHED_SCAN_RESULTS);
 		}
-		nl80211_send_sched_scan(request, NL80211_CMD_SCHED_SCAN_RESULTS);
 	}
-
 	rtnl_unlock();
 }

-void cfg80211_sched_scan_results(struct wiphy *wiphy)
+void cfg80211_sched_scan_results(struct wiphy *wiphy, u64 reqid)
 {
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 	struct cfg80211_sched_scan_request *request;

-	trace_cfg80211_sched_scan_results(wiphy);
+	trace_cfg80211_sched_scan_results(wiphy, reqid);
 	/* ignore if we're not scanning */

 	rtnl_lock();
-	request = cfg80211_find_sched_scan_req(rdev, 0);
+	request = cfg80211_find_sched_scan_req(rdev, reqid);
+	if (request) {
+		request->report_results = true;
+		queue_work(cfg80211_wq, &rdev->sched_scan_res_wk);
+	}
 	rtnl_unlock();
-
-	if (!IS_ERR(request))
-		queue_work(cfg80211_wq,
-			   &wiphy_to_rdev(wiphy)->sched_scan_results_wk);
 }
 EXPORT_SYMBOL(cfg80211_sched_scan_results);

-void cfg80211_sched_scan_stopped_rtnl(struct wiphy *wiphy)
+void cfg80211_sched_scan_stopped_rtnl(struct wiphy *wiphy, u64 reqid)
 {
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

 	ASSERT_RTNL();

-	trace_cfg80211_sched_scan_stopped(wiphy);
+	trace_cfg80211_sched_scan_stopped(wiphy, reqid);

-	__cfg80211_stop_sched_scan(rdev, 0, true);
+	__cfg80211_stop_sched_scan(rdev, reqid, true);
 }
 EXPORT_SYMBOL(cfg80211_sched_scan_stopped_rtnl);

-void cfg80211_sched_scan_stopped(struct wiphy *wiphy)
+void cfg80211_sched_scan_stopped(struct wiphy *wiphy, u64 reqid)
 {
 	rtnl_lock();
-	cfg80211_sched_scan_stopped_rtnl(wiphy);
+	cfg80211_sched_scan_stopped_rtnl(wiphy, reqid);
 	rtnl_unlock();
 }
 EXPORT_SYMBOL(cfg80211_sched_scan_stopped);
@ -456,8 +455,8 @@ int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 	ASSERT_RTNL();

 	sched_scan_req = cfg80211_find_sched_scan_req(rdev, reqid);
-	if (IS_ERR(sched_scan_req))
-		return PTR_ERR(sched_scan_req);
+	if (!sched_scan_req)
+		return -ENOENT;

 	return cfg80211_stop_sched_scan_req(rdev, sched_scan_req,
 					    driver_initiated);
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@ -2820,14 +2820,28 @@ TRACE_EVENT(cfg80211_scan_done,
 		  MAC_PR_ARG(tsf_bssid))
 );

-DEFINE_EVENT(wiphy_only_evt, cfg80211_sched_scan_results,
-	TP_PROTO(struct wiphy *wiphy),
-	TP_ARGS(wiphy)
+DECLARE_EVENT_CLASS(wiphy_id_evt,
+	TP_PROTO(struct wiphy *wiphy, u64 id),
+	TP_ARGS(wiphy, id),
+	TP_STRUCT__entry(
+		WIPHY_ENTRY
+		__field(u64, id)
+	),
+	TP_fast_assign(
+		WIPHY_ASSIGN;
+		__entry->id = id;
+	),
+	TP_printk(WIPHY_PR_FMT ", id: %llu", WIPHY_PR_ARG, __entry->id)
 );

-DEFINE_EVENT(wiphy_only_evt, cfg80211_sched_scan_stopped,
-	TP_PROTO(struct wiphy *wiphy),
-	TP_ARGS(wiphy)
+DEFINE_EVENT(wiphy_id_evt, cfg80211_sched_scan_stopped,
+	TP_PROTO(struct wiphy *wiphy, u64 id),
+	TP_ARGS(wiphy, id)
+);
+
+DEFINE_EVENT(wiphy_id_evt, cfg80211_sched_scan_results,
+	TP_PROTO(struct wiphy *wiphy, u64 id),
+	TP_ARGS(wiphy, id)
 );

 TRACE_EVENT(cfg80211_get_bss,