Re: Errors on newly created file system

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

在 2025/4/25 05:41, Ferry Toth 写道:
> Hi
> 
[...]
>>
>>
>> Except with newer mkfs.btrfs (I tested using 6.13) the files are owned 
>> by the unprivileged user.
>>
>>
>> The result is, the image will not boot correctly.
>>
>>
> I found more about this issue here
> 
> https://lore.kernel.org/yocto/ 
> tRtu.1740682678597454399.5171@lists.yoctoproject.org/T/ 
> #m5de0afa17d2c0f640e86ffe67e0d74aea467fd5b
> 
Thanks for the report.

Just want to be sure, with pseudo emulating root environment, how does 
it handle the file uid/gid?

Mkfs.btrfs uses the uid/gid reported from stat() system calls, thus if 
pseudo doesn't change uid/gid reported from stat(), mkfs.btrfs will just 
follow the result.

I guess it's possible for us to implement an idmap-like solution, but 
I'd like to know how pseudo works first.

Thanks,
Qu