:orphan:

.. title:: FS_FATFS_MAX_LFN

.. option:: CONFIG_FS_FATFS_MAX_LFN

*Max filename length*

Type: ``int``

Help
====

The working buffer occupies (FS_FATFS_MAX_LFN + 1) * 2 bytes and
additional 608 bytes at exFAT enabled.
It should be set 255 to support full featured LFN operations.

Direct dependencies
===================

\ :option:`FS_FATFS_LFN <CONFIG_FS_FATFS_LFN>` && \ :option:`FAT_FILESYSTEM_ELM <CONFIG_FAT_FILESYSTEM_ELM>` && \ :option:`FILE_SYSTEM <CONFIG_FILE_SYSTEM>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- 255

Kconfig definition
==================

.. highlight:: kconfig

At ``subsys/fs/Kconfig.fatfs:89``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:34`` → ``subsys/Kconfig:25`` → ``subsys/fs/Kconfig:60``

Menu path: (Top) → Sub Systems and OS Services → File Systems → File system support → ELM FAT file system support → ELM FAT file system settings → Enable long filenames (LFN)

.. parsed-literal::

    config FS_FATFS_MAX_LFN
    	int "Max filename length" if \ :option:`FAT_FILESYSTEM_ELM <CONFIG_FAT_FILESYSTEM_ELM>`
    	range 12 255
    	default 255
    	depends on \ :option:`FS_FATFS_LFN <CONFIG_FS_FATFS_LFN>` && \ :option:`FAT_FILESYSTEM_ELM <CONFIG_FAT_FILESYSTEM_ELM>` && \ :option:`FILE_SYSTEM <CONFIG_FILE_SYSTEM>`
    	help
    	  The working buffer occupies (FS_FATFS_MAX_LFN + 1) * 2 bytes and
    	  additional 608 bytes at exFAT enabled.
    	  It should be set 255 to support full featured LFN operations.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*