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

[Gao Xiang]

Hi David,

On Tue, Mar 01, 2022 at 02:09:36PM +0800, Gao Xiang wrote:
> On Mon, Feb 28, 2022 at 10:02:02PM -0800, David Anderson wrote:
> > 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.
> 
> Yeah, I recommend that we could use mtime from now on, but in case that
> users are confused, we may need add a compatible feature to indicate that.

Would you mind sending a kernel patch to rename them recently if
you have some free slot?

We're in 5.17-rc7 cycle.. I think we have to prepare patches for
5.18 now so we can use new timestamp behavior from 5.18..

Thanks,
Gao Xiang