storage: When delete extended partition, need to refresh pool

When removing a volume that is the extended partition, all the logical
volume partitions that exist within the extended partition will also be
removed, so we need to refresh the pool to have the updated list

src/storage/storage_backend_disk.c

@@ -654,7 +654,7 @@ virStorageBackendDiskPartBoundaries(virStoragePoolObjPtr pool,
 
 
 static int
-virStorageBackendDiskDeleteVol(virConnectPtr conn ATTRIBUTE_UNUSED,
+virStorageBackendDiskDeleteVol(virConnectPtr conn,
                                virStoragePoolObjPtr pool,
                                virStorageVolDefPtr vol,
                                unsigned int flags)
@@ -721,6 +721,15 @@ virStorageBackendDiskDeleteVol(virConnectPtr conn ATTRIBUTE_UNUSED,
             goto cleanup;
     }
 
+    /* If this was the extended partition, then all the logical partitions
+     * are then lost. Make it easy on ourselves and just refresh the pool
+     */
+    if (vol->source.partType == VIR_STORAGE_VOL_DISK_TYPE_EXTENDED) {
+        virStoragePoolObjClearVols(pool);
+        if (virStorageBackendDiskRefreshPool(conn, pool) < 0)
+            goto cleanup;
+    }
+
     rc = 0;
  cleanup:
     VIR_FREE(devpath);