menu "Device virtual file system"

config RT_USING_DFS
    bool "Using device virtual file system"
    default y
    help
        The device file system is a light weight virtual file system.

if RT_USING_DFS
    config DFS_USING_WORKDIR
        bool "Using working directory"
        default y

    config DFS_FILESYSTEMS_MAX
        int "The maximal number of mounted file system"
        default 2
    
    config DFS_FD_MAX
        int "The maximal number of opened files"
        default 4
    
    config RT_USING_DFS_ELMFAT
        bool "Enable elm-chan fatfs"
        default y
        help
            FatFs is a generic FAT/exFAT file system module for small embedded systems.

    if RT_USING_DFS_ELMFAT
        menu "elm-chan's FatFs, Generic FAT Filesystem Module"
        config RT_DFS_ELM_CODE_PAGE
            int "OEM code page"
            default 437

        config RT_DFS_ELM_WORD_ACCESS
            bool "Using RT_DFS_ELM_WORD_ACCESS"
            default y   

        choice 
            prompt "Support long file name"
            default RT_DFS_ELM_USE_LFN_0

            config RT_DFS_ELM_USE_LFN_0
                bool "0: LFN disable"

            config RT_DFS_ELM_USE_LFN_1
                bool "1: LFN with static LFN working buffer"

            config RT_DFS_ELM_USE_LFN_2
                bool "2: LFN with dynamic LFN working buffer on the stack"
            
            config RT_DFS_ELM_USE_LFN_3
                bool "3: LFN with dynamic LFN working buffer on the heap"
        endchoice
        
        config RT_DFS_ELM_USE_LFN
            int
            default 0 if RT_DFS_ELM_USE_LFN_0
            default 1 if RT_DFS_ELM_USE_LFN_1
            default 2 if RT_DFS_ELM_USE_LFN_2
            default 3 if RT_DFS_ELM_USE_LFN_3
        
        config RT_DFS_ELM_MAX_LFN
            int "Maximal size of file name length"
            range 12 255
            default 255

        config RT_DFS_ELM_DRIVES
            int "Number of volumes (logical drives) to be used."
            default 2

        config RT_DFS_ELM_MAX_SECTOR_SIZE
            int "Maximum sector size to be handled."
            default 512
            help
                if you use some spi nor flash for fatfs, please set this the erase sector size, for example 4096.

        config RT_DFS_ELM_USE_ERASE
            bool "Enable sector erase feature"
            default n
        
        config RT_DFS_ELM_REENTRANT
            bool "Enable the reentrancy (thread safe) of the FatFs module"
            default y
        endmenu
    endif

    config RT_USING_DFS_DEVFS
        bool "Using devfs for device objects"
        default y
    
    config RT_USING_DFS_NET
        bool "Enable BSD socket operated by file system API"
        select RT_USING_LWIP
        select RT_USING_POSIX
        default n
        help
            Let BSD socket operated by file system API, such as read/write and involveed in select/poll POSIX APIs.

    config RT_USING_DFS_ROMFS
        bool "Enable ReadOnly file system on flash"
        default n

    config RT_USING_DFS_RAMFS
        bool "Enable RAM file system"
        default n

    config RT_USING_DFS_UFFS
        bool "Enable UFFS file system: Ultra-low-cost Flash File System"
        select RT_USING_MTD_NAND
        default n

    config RT_USING_DFS_NFS
        bool "Using NFS v3 client file system"
        depends on RT_USING_LWIP
        default n

    if RT_USING_DFS_NFS
        config RT_NFS_HOST_EXPORT
            string "NFSv3 host export"
            default "192.168.1.5:/"
    endif

endif

endmenu