WSL2: Seek of directory entry by lseek does not work on v9fs

[Zenexer]

Please reopen #5074. There's no indication that it's been resolved, meaning that PHP remains unusable in WSL2.

[github-actions]

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View similar issues

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Closed similar issues:

• Seeking in directory inode does not work on drvfs (#5938), similarity score: 0.73

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[zcobol]

@Zenexer the sorting seems to work as you expected on wsl-2.4.8:

zcobol@texas:~/test2$ wslinfo --wsl-version
2.4.8
zcobol@texas:~/test2$ ls xxx | wc -l
40
zcobol@texas:~/test2$ ./a.out
0000006.txt
0000021.txt
0000019.txt
0000035.txt
0000014.txt
0000027.txt
0000031.txt
0000009.txt
0000028.txt
0000007.txt
.
0000001.txt
0000030.txt
0000024.txt
0000017.txt
0000037.txt
0000011.txt
0000008.txt
0000010.txt
0000016.txt
..
0000005.txt
0000033.txt
0000029.txt
0000022.txt
0000012.txt
0000002.txt
0000034.txt
0000018.txt
0000026.txt
0000025.txt
0000020.txt
0000040.txt
0000032.txt
0000004.txt
0000013.txt
0000023.txt
0000038.txt
0000003.txt
0000015.txt
0000039.txt
0000036.txt
zcobol@texas:~/test2$ ./a.out | sort
.
..
0000001.txt
0000002.txt
0000003.txt
0000004.txt
0000005.txt
0000006.txt
0000007.txt
0000008.txt
0000009.txt
0000010.txt
0000011.txt
0000012.txt
0000013.txt
0000014.txt
0000015.txt
0000016.txt
0000017.txt
0000018.txt
0000019.txt
0000020.txt
0000021.txt
0000022.txt
0000023.txt
0000024.txt
0000025.txt
0000026.txt
0000027.txt
0000028.txt
0000029.txt
0000030.txt
0000031.txt
0000032.txt
0000033.txt
0000034.txt
0000035.txt
0000036.txt
0000037.txt
0000038.txt
0000039.txt
0000040.txt

[Zenexer]

@zcobol I've moved away from Windows in large part due to this issue, as it significantly impeded my development workflow. Personally, I'm not willing to bother re-evaluating it until someone from Microsoft responds in the original issue. I would think that if it were actually resolved for everyone, someone would've said so in the original issue, since it was quite the show-stopper.

[Zenexer]

@zcobol For the sake of science, I tried installing WSL2 on my gaming PC and can still repro it. Make sure you're actually testing within v9fs. The xxx directory needs to be in a v9fs-mounted filesystem such as /mnt/c.

paul@Paul-Desktop:/mnt/c/Users/paul/git/v9fs-bug$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 24.04.1 LTS
Release:        24.04
Codename:       noble
paul@Paul-Desktop:/mnt/c/Users/paul/git/v9fs-bug$ ./a | sort
0000031.txt
0000032.txt
0000033.txt
0000034.txt
0000035.txt
0000036.txt
0000037.txt
0000038.txt
0000039.txt
0000040.txt
paul@Paul-Desktop:/mnt/c/Users/paul/git/v9fs-bug$ wslinfo --wsl-version
2.3.26

PS C:\Users\paul> wsl --version
WSL version: 2.3.26.0
Kernel version: 5.15.167.4-1
WSLg version: 1.0.65
MSRDC version: 1.2.5620
Direct3D version: 1.611.1-81528511
DXCore version: 10.0.26100.1-240331-1435.ge-release
Windows version: 10.0.22631.4602
PS C:\Users\paul> wsl --update
Checking for updates.
The most recent version of Windows Subsystem for Linux is already installed.