wifi: cfg80211: Store the NAN cluster ID

When the driver indicates that the device has joined
a cluster, store the cluster ID. This is needed for data
path operations, e.g., filtering received frames etc.

Signed-off-by: Ilan Peer <[e-mail]>
Signed-off-by: Miri Korenblit <[e-mail]>
Link: https://patch.msgid.link/20250908140015.63e9fef2a3aa.I6c858185c9e71f84bd2c5174d7ee45902b4391c3@changeid
Signed-off-by: Johannes Berg <[e-mail]>

include/net/cfg80211.h

···
 		struct {
 			struct cfg80211_chan_def chandef;
 		} ocb;
+		struct {
+			u8 cluster_id[ETH_ALEN] __aligned(2);
+		} nan;
 	} u;
 
 	struct {

net/wireless/nl80211.c

···
 
 	trace_cfg80211_nan_cluster_joined(wdev, cluster_id, new_cluster);
 
+	memcpy(wdev->u.nan.cluster_id, cluster_id, ETH_ALEN);
+
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
 	if (!msg)
 		return;