:orphan:

.. title:: CONFIG_FS_FATFS_MAX_LFN

.. kconfig:: CONFIG_FS_FATFS_MAX_LFN

CONFIG_FS_FATFS_MAX_LFN
#######################

*Max filename length*

Type: ``int``

Help
====

.. code-block:: none

    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
===================

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

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

Default
=======

- 255

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



At ``<Zephyr Subsystem>/fs/Kconfig.fatfs:89``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:25`` → ``<Zephyr Subsystem>/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)

.. code-block:: kconfig

    config FS_FATFS_MAX_LFN
    	int "Max filename length" if FAT_FILESYSTEM_ELM
    	range 12 255
    	default 255
    	depends on FS_FATFS_LFN && FAT_FILESYSTEM_ELM && 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.)*