Inconsistency in LFS_NAME_MAX settings (LittleFS / mklittlefs)

[Jason2866]

Board

not relevant

Device Description

general issue

Hardware Configuration

no hardware

Version

latest master (checkout manually)

IDE Name

Platformio (custom self build)

Operating System

macOS 12.3

Flash frequency

not relevant

PSRAM enabled

no

Upload speed

115200

Description

When a LittleFS partition is downloaded via esptool.py the files can not be extracted. There are different settings choosen for LFS_NAME_MAX for LittleFS in IDF/Arduino and in tool mklittlefs. It is64 for IDF / Arduino. For the tool mklittlefs it is 32
As it is now the tool mklittlefs is not useable.
See joltwallet/esp_littlefs#78 too.

Sketch

Make a LittleFS partition download this partition and try to extract with mklittlefs.

Debug Message

not needed

Other Steps to Reproduce

none

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[me-no-dev]

Is there a properly compiled tool, or should we change the config here?

[Jason2866]

@me-no-dev There is no tool at the moment which has LFS_NAME_MAX = 64 as setting. Esp8266 Arduino uses 32 as default. Would be nice to be align.
Idk if this would be a breaking change.
Maybe it is a good idea espressif forks the littlefs repo to be save from unexpected changes

[BrianPugh]

the least breaking change would probably be to upload pre-compiled binaries with LFS_NAME_MAX=64. Changing the arduino default from 64->32 could catch people who rely on the default by surprise and leave broken systems.

The repo owner provided a nice command to cross compile all the packages, could simply rebuild them with -DLFS_NAME_MAX=64.

[BrianPugh]

I merged in the PR that correctly passed along the appropriate variables to the compilation of mklittlefs. This is a part of esp_littlefs v1.5.4

[BrianPugh]

esp_littlefs has migrated from mklittlefs to littlefs-python for image generation in v1.9.0, further mitigating this problem.

[Jason2866]

@BrianPugh Thanks for heads up! Will test the next days.

[Jason2866]

It does work now with the changes made. Thx @BrianPugh
Compiled mklittlefs version with setting LFS_NAME_MAX = 64. Now it is possible to build a valid FS image and read the FS image back from a device and extract the files. Extracting files was never possible before.
@me-no-dev The fully esp32 compatible mklittlfs binaries for all platforms are here
Feel free to use or not ;-)
@maxgerhardt Now your platformio script is working fully. Download the LittleFS flash Region and extracting the files! Implemented here