storage: Don't show LV structure for device-mapper PVs.

See storaged-project/udisks#1206 for why this
is unfortunately broken right now.

pkg/storaged/client.js

@@ -283,14 +283,24 @@ function update_indices() {
         client.vgnames_vgroup[vgroup.Name] = vgroup;
     }
 
+    const vgroups_with_dm_pvs = { };
+
     client.vgroups_pvols = { };
     for (path in client.vgroups) {
         client.vgroups_pvols[path] = [];
     }
     for (path in client.blocks_pvol) {
         pvol = client.blocks_pvol[path];
-        if (client.vgroups_pvols[pvol.VolumeGroup] !== undefined)
+        if (client.vgroups_pvols[pvol.VolumeGroup] !== undefined) {
             client.vgroups_pvols[pvol.VolumeGroup].push(pvol);
+            {
+                // HACK - this is needed below to deal with a UDisks2 bug.
+                // https://github.com/storaged-project/udisks/pull/1206
+                const block = client.blocks[path];
+                if (block && utils.decode_filename(block.Device).indexOf("/dev/dm-") == 0)
+                    vgroups_with_dm_pvs[pvol.VolumeGroup] = true;
+            }
+        }
     }
     function cmp_pvols(a, b) {
         return utils.block_cmp(client.blocks[a.path], client.blocks[b.path]);
@@ -351,6 +361,14 @@ function update_indices() {
         const struct = client.lvols[path].Structure;
         const lvol = client.lvols[path];
 
+        // HACK - UDisks2 can't find the PVs of a segment when they
+        //        are on a device mapper device.
+        //
+        // https://github.com/storaged-project/udisks/pull/1206
+
+        if (vgroups_with_dm_pvs[lvol.VolumeGroup])
+            continue;
+
         let summary;
         let status = "";
         if (lvol.Layout != "thin" && struct && struct.segments) {