config FS_VFS bool "Enable VFS" default y help Answer Y to enable LiteOS support virtual filesystem.config FS_VFS_BLOCK_DEVICE bool "Enable Block DEVICE" default n depends on FS_VFS help Answer Y to enable LiteOS support read/open/seek/write block device.config FILE_MODE bool "Enable FILE MODE" default y depends on FS_VFS help Answer Y to enable LiteOS support file mode.