wifi: cfg80211: move DFS related members to links[] in wireless_dev

A few members related to DFS handling are currently under per wireless
device data structure. However, in order to support DFS with MLO, there is
a need to have them on a per-link manner.

Hence, as a preliminary step, move members cac_started, cac_start_time
and cac_time_ms to be on a per-link basis.

Since currently, link ID is not known at all places, use default value of
0 for now.

Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Link: https://patch.msgid.link/20240906064426.2101315-5-quic_adisi@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

10 files changed, 22 insertions, 21 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index d3115be54997..5725ab6f495f 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1662,7 +1662,7 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev,
 	ieee80211_link_info_change_notify(sdata, link,
 					  BSS_CHANGED_BEACON_ENABLED);
 
-	if (sdata->wdev.cac_started) {
+	if (sdata->wdev.links[0].cac_started) {
 		chandef = link_conf->chanreq.oper;
 		wiphy_delayed_work_cancel(wiphy, &link->dfs_cac_timer_work);
 		cfg80211_cac_event(sdata->dev, &chandef,
@@ -3501,9 +3501,9 @@ static void ieee80211_end_cac(struct wiphy *wiphy,
 		wiphy_delayed_work_cancel(wiphy,
 					  &sdata->deflink.dfs_cac_timer_work);
 
-		if (sdata->wdev.cac_started) {
+		if (sdata->wdev.links[0].cac_started) {
 			ieee80211_link_release_channel(&sdata->deflink);
-			sdata->wdev.cac_started = false;
+			sdata->wdev.links[0].cac_started = false;
 		}
 	}
 }
@@ -3958,7 +3958,7 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
 	if (!list_empty(&local->roc_list) || local->scanning)
 		return -EBUSY;
 
-	if (sdata->wdev.cac_started)
+	if (sdata->wdev.links[0].cac_started)
 		return -EBUSY;
 
 	if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 7bb71ac52277..bdaf8e215965 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -552,7 +552,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_do
 	wiphy_delayed_work_cancel(local->hw.wiphy,
 				  &sdata->deflink.dfs_cac_timer_work);
 
-	if (sdata->wdev.cac_started) {
+	if (sdata->wdev.links[0].cac_started) {
 		chandef = sdata->vif.bss_conf.chanreq.oper;
 		WARN_ON(local->suspended);
 		ieee80211_link_release_channel(&sdata->deflink);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 85789c184949..79579c89e281 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -3039,7 +3039,7 @@ void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work)
 
 	lockdep_assert_wiphy(sdata->local->hw.wiphy);
 
-	if (sdata->wdev.cac_started) {
+	if (sdata->wdev.links[0].cac_started) {
 		ieee80211_link_release_channel(link);
 		cfg80211_cac_event(sdata->dev, &chandef,
 				   NL80211_RADAR_CAC_FINISHED,
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 14e18fd9e919..6735620378f4 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -585,7 +585,7 @@ static bool __ieee80211_can_leave_ch(struct ieee80211_sub_if_data *sdata)
 		return false;
 
 	list_for_each_entry(sdata_iter, &local->interfaces, list) {
-		if (sdata_iter->wdev.cac_started)
+		if (sdata_iter->wdev.links[0].cac_started)
 			return false;
 	}
 
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 071cbb7929d9..ab17361dba97 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3478,7 +3478,7 @@ void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
 		wiphy_delayed_work_cancel(local->hw.wiphy,
 					  &sdata->deflink.dfs_cac_timer_work);
 
-		if (sdata->wdev.cac_started) {
+		if (sdata->wdev.links[0].cac_started) {
 			chandef = sdata->vif.bss_conf.chanreq.oper;
 			ieee80211_link_release_channel(&sdata->deflink);
 			cfg80211_cac_event(sdata->dev,
diff --git a/net/wireless/ibss.c b/net/wireless/ibss.c
index 34e5acff3935..1e3ed29f7cfc 100644
--- a/net/wireless/ibss.c
+++ b/net/wireless/ibss.c
@@ -94,7 +94,7 @@ int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 
 	lockdep_assert_held(&rdev->wiphy.mtx);
 
-	if (wdev->cac_started)
+	if (wdev->links[0].cac_started)
 		return -EBUSY;
 
 	if (wdev->u.ibss.ssid_len)
diff --git a/net/wireless/mesh.c b/net/wireless/mesh.c
index aaca65b66af4..2c6654075ca9 100644
--- a/net/wireless/mesh.c
+++ b/net/wireless/mesh.c
@@ -127,7 +127,7 @@ int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 	if (!rdev->ops->join_mesh)
 		return -EOPNOTSUPP;
 
-	if (wdev->cac_started)
+	if (wdev->links[0].cac_started)
 		return -EBUSY;
 
 	if (!setup->chandef.chan) {
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 4052041a19ea..fddd6a62b942 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -1123,13 +1123,14 @@ void cfg80211_cac_event(struct net_device *netdev,
 
 	trace_cfg80211_cac_event(netdev, event);
 
-	if (WARN_ON(!wdev->cac_started && event != NL80211_RADAR_CAC_STARTED))
+	if (WARN_ON(!wdev->links[0].cac_started &&
+		    event != NL80211_RADAR_CAC_STARTED))
 		return;
 
 	switch (event) {
 	case NL80211_RADAR_CAC_FINISHED:
-		timeout = wdev->cac_start_time +
-			  msecs_to_jiffies(wdev->cac_time_ms);
+		timeout = wdev->links[0].cac_start_time +
+			  msecs_to_jiffies(wdev->links[0].cac_time_ms);
 		WARN_ON(!time_after_eq(jiffies, timeout));
 		cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
 		memcpy(&rdev->cac_done_chandef, chandef,
@@ -1138,10 +1139,10 @@ void cfg80211_cac_event(struct net_device *netdev,
 		cfg80211_sched_dfs_chan_update(rdev);
 		fallthrough;
 	case NL80211_RADAR_CAC_ABORTED:
-		wdev->cac_started = false;
+		wdev->links[0].cac_started = false;
 		break;
 	case NL80211_RADAR_CAC_STARTED:
-		wdev->cac_started = true;
+		wdev->links[0].cac_started = true;
 		break;
 	default:
 		WARN_ON(1);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 3a11a1a74a54..f4fdf32d5d07 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6066,7 +6066,7 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
 	if (!rdev->ops->start_ap)
 		return -EOPNOTSUPP;
 
-	if (wdev->cac_started)
+	if (wdev->links[0].cac_started)
 		return -EBUSY;
 
 	if (wdev->links[link_id].ap.beacon_interval)
@@ -10121,7 +10121,7 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
 		goto unlock;
 	}
 
-	if (cfg80211_beaconing_iface_active(wdev) || wdev->cac_started) {
+	if (cfg80211_beaconing_iface_active(wdev) || wdev->links[0].cac_started) {
 		err = -EBUSY;
 		goto unlock;
 	}
@@ -10157,9 +10157,9 @@ static int nl80211_start_radar_detection(struct sk_buff *skb,
 		default:
 			break;
 		}
-		wdev->cac_started = true;
-		wdev->cac_start_time = jiffies;
-		wdev->cac_time_ms = cac_time_ms;
+		wdev->links[0].cac_started = true;
+		wdev->links[0].cac_start_time = jiffies;
+		wdev->links[0].cac_time_ms = cac_time_ms;
 	}
 unlock:
 	wiphy_unlock(wiphy);
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 4a27f3823e25..898abc6d0609 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -4241,7 +4241,7 @@ static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
 	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 		struct cfg80211_chan_def *chandef;
 
-		if (!wdev->cac_started)
+		if (!wdev->links[0].cac_started)
 			continue;
 
 		/* FIXME: radar detection is tied to link 0 for now */