Re: [potential issue, question] whiteout shows up in merged directory

[Gao Xiang <hsiangkao@linux.alibaba.com>]

On 2023/9/4 23:03, Amir Goldstein wrote:
> On Mon, Sep 4, 2023 at 5:38 PM Gao Xiang <hsiangkao@linux.alibaba.com> wrote:

..

>>>>
>>>
>>> Let me put it this way:
>>> If there was an official offline tool to merge overlayfs layers
>>> I would expect that tool to mark the offline merged directories
>>> with an empty "trusted.overlayfs.origin", to be able to distinguish
>>> them from pure non-merge directories.
>>>
>>> I do not consider dealing with this in erofs-utils side a workaround
>>> I consider it crafting layers in expected overlayfs format.
>>
>> Thanks for the hints.
>>
>> Ok, marking impure makes sense as long as it's properly described.
>>
>> Just tried to describe the background since the question I think
>> is not quite erofs-utils specific, btw, if there could be some
>> reference official offline tool, that would be great!
>>
> 
> There is this tool from kmxz that supports offline merge:
> https://github.com/kmxz/overlayfs-tools
> but it is not in any way "official".
> 
> I have contributed redirect and metacopy support in 2020
> and there hasn't been much traffic since.
> This tool does not deal with origin and impure xattrs.

Thanks, very useful link! will also check this later.

> 
> Thanks,
> Amir.