wifi: mac80211_hwsim: handle links for wmediumd/virtio

For wmediumd/virtio, handle both the RX channel for links,
as well as the link addresses when links are added/removed.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/mac80211_hwsim.c

@@ -2995,6 +2995,24 @@ static int mac80211_hwsim_change_vif_links(struct ieee80211_hw *hw,
 					   u16 old_links, u16 new_links,
 					   struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS])
 {
+	unsigned long rem = old_links & ~new_links ?: BIT(0);
+	unsigned long add = new_links & ~old_links;
+	int i;
+
+	for_each_set_bit(i, &rem, IEEE80211_MLD_MAX_NUM_LINKS)
+		mac80211_hwsim_config_mac_nl(hw, old[i]->addr, false);
+
+	for_each_set_bit(i, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
+		struct ieee80211_bss_conf *link_conf;
+
+		/* FIXME: figure out how to get the locking here */
+		link_conf = rcu_dereference_protected(vif->link_conf[i], 1);
+		if (WARN_ON(!link_conf))
+			continue;
+
+		mac80211_hwsim_config_mac_nl(hw, link_conf->addr, true);
+	}
+
 	return 0;
 }
 
@@ -4478,16 +4496,28 @@ static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
 	/* A frame is received from user space */
 	memset(&rx_status, 0, sizeof(rx_status));
 	if (info->attrs[HWSIM_ATTR_FREQ]) {
+		struct tx_iter_data iter_data = {};
+
 		/* throw away off-channel packets, but allow both the temporary
-		 * ("hw" scan/remain-on-channel) and regular channel, since the
-		 * internal datapath also allows this
+		 * ("hw" scan/remain-on-channel), regular channels and links,
+		 * since the internal datapath also allows this
 		 */
-		mutex_lock(&data2->mutex);
 		rx_status.freq = nla_get_u32(info->attrs[HWSIM_ATTR_FREQ]);
 
-		if (rx_status.freq != channel->center_freq) {
-			mutex_unlock(&data2->mutex);
+		iter_data.channel = ieee80211_get_channel(data2->hw->wiphy,
+							  rx_status.freq);
+		if (!iter_data.channel)
 			goto out;
+
+		mutex_lock(&data2->mutex);
+		if (!hwsim_chans_compat(iter_data.channel, channel)) {
+			ieee80211_iterate_active_interfaces_atomic(
+				data2->hw, IEEE80211_IFACE_ITER_NORMAL,
+				mac80211_hwsim_tx_iter, &iter_data);
+			if (!iter_data.receive) {
+				mutex_unlock(&data2->mutex);
+				goto out;
+			}
 		}
 		mutex_unlock(&data2->mutex);
 	} else {