wifi: cfg80211: do some rework towards MLO link APIs

In order to support multi-link operation with multiple links,
start adding some APIs. The notable addition here is to have
the link ID in a new nl80211 attribute, that will be used to
differentiate the links in many nl80211 operations.

So far, this patch adds the netlink NL80211_ATTR_MLO_LINK_ID
attribute (as well as the NL80211_ATTR_MLO_LINKS attribute)
and plugs it through the system in some places, checking the
validity etc. along with other infrastructure needed for it.

For now, I've decided to include only the over-the-air link
ID in the API. I know we discussed that we eventually need to
have to have other ways of identifying a link, but for local
AP mode and auth/assoc commands as well as set_key etc. we'll
use the OTA ID.

Also included in this patch is some refactoring of the data
structures in struct wireless_dev, splitting for the first
time the data into type dependent pieces, to make reasoning
about these things easier.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
index 84b15a655eab..1593e810b3ca 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
@@ -352,7 +352,8 @@ static int qtnf_start_ap(struct wiphy *wiphy, struct net_device *dev,
 	return ret;
 }
 
-static int qtnf_stop_ap(struct wiphy *wiphy, struct net_device *dev)
+static int qtnf_stop_ap(struct wiphy *wiphy, struct net_device *dev,
+			unsigned int link_id)
 {
 	struct qtnf_vif *vif = qtnf_netdev_get_priv(dev);
 	int ret;
@@ -500,7 +501,7 @@ qtnf_dump_station(struct wiphy *wiphy, struct net_device *dev,
 
 	switch (vif->wdev.iftype) {
 	case NL80211_IFTYPE_STATION:
-		if (idx != 0 || !vif->wdev.current_bss)
+		if (idx != 0 || !vif->wdev.connected)
 			return -ENOENT;
 
 		ether_addr_copy(mac, vif->bssid);
@@ -729,7 +730,7 @@ qtnf_disconnect(struct wiphy *wiphy, struct net_device *dev,
 		pr_err("VIF%u.%u: failed to disconnect\n",
 		       mac->macid, vif->vifid);
 
-	if (vif->wdev.current_bss) {
+	if (vif->wdev.connected) {
 		netif_carrier_off(vif->netdev);
 		cfg80211_disconnected(vif->netdev, reason_code,
 				      NULL, 0, true, GFP_KERNEL);
@@ -745,10 +746,11 @@ qtnf_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 	struct qtnf_wmac *mac = wiphy_priv(wiphy);
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct ieee80211_supported_band *sband;
-	const struct cfg80211_chan_def *chandef = &wdev->chandef;
+	const struct cfg80211_chan_def *chandef = wdev_chandef(wdev, 0);
 	struct ieee80211_channel *chan;
 	int ret;
 
+
 	sband = wiphy->bands[NL80211_BAND_2GHZ];
 	if (sband && idx >= sband->n_channels) {
 		idx -= sband->n_channels;
@@ -765,7 +767,7 @@ qtnf_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 	survey->channel = chan;
 	survey->filled = 0x0;
 
-	if (chan == chandef->chan)
+	if (chandef && chan == chandef->chan)
 		survey->filled = SURVEY_INFO_IN_USE;
 
 	ret = qtnf_cmd_get_chan_stats(mac, chan->center_freq, survey);
@@ -778,7 +780,7 @@ qtnf_dump_survey(struct wiphy *wiphy, struct net_device *dev,
 
 static int
 qtnf_get_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
-		 struct cfg80211_chan_def *chandef)
+		 unsigned int link_id, struct cfg80211_chan_def *chandef)
 {
 	struct net_device *ndev = wdev->netdev;
 	struct qtnf_vif *vif;