Blocking #10 * NBD_OPT_STRUCTURED_REPLY * NBD_REPLY_FLAG_DONE * NBD_REPLY_TYPE_NONE * NBD_REPLY_TYPE_OFFSET_DATA * NBD_REPLY_TYPE_OFFSET_HOLE * NBD_REPLY_TYPE_ERROR * NBD_REPLY_TYPE_ERROR_OFFSET * NBD_STRUCTURED_REPLY_MAGIC * NBD_REPLY_FLAG_DONE * NBD_CMD_FLAG_DF * NBD_CMD_FLAG_NO_HOLE
