[PATCH] erofs-utils: mkfs: Use mtime to seed ctimes

[David Anderson]

On Mon, Feb 28, 2022 at 9:27 PM Gao Xiang <hsiangkao at linux.alibaba.com> wrote:
>
> Yeah, I agree I should think more when I planned to store `ctime' at the
> first time [my original thought was to keep metadata time (including
> uid, gid, etc..), so I selected `ctime' instead of `mtime'].
>
> Should we change what's described in 'Documentation/filesystems/erofs.rst'
> and even rename i_ctime to i_mtime?

That's a good idea, I'll repost with a patch to rename to mtime.
Initially I figured it was ok, but the "ctime" name would cause
problems if EROFS ever stores both timestamps.

> Also should we introduce a new compat feature to indicate that new mkfs
> records mtime instead?

Will do. Is there anything in the kernel that would need to care about
the new flag? (It looks like no but asking just in case.)

Best,

-David