Re: [PATCH v10 03/14] exfat: add inode operations

[Arnd Bergmann]

On Wed, Jan 15, 2020 at 9:28 AM Namjae Jeon <namjae.jeon@xxxxxxxxxxx> wrote:

> +       /* set FILE_INFO structure using the acquired struct exfat_dentry */
> +       exfat_set_entry_time(sbi, &inode->i_ctime,
> +                       &ep->dentry.file.create_time,
> +                       &ep->dentry.file.create_date,
> +                       &ep->dentry.file.create_tz);
> +       exfat_set_entry_time(sbi, &inode->i_mtime,
> +                       &ep->dentry.file.modify_time,
> +                       &ep->dentry.file.modify_date,
> +                       &ep->dentry.file.modify_tz);
> +       exfat_set_entry_time(sbi, &inode->i_atime,
> +                       &ep->dentry.file.access_time,
> +                       &ep->dentry.file.access_date,
> +                       &ep->dentry.file.access_tz);

I wonder if i_ctime should be handled differently. With statx() we finally have
a concept of "file creation time" in "stx_btime". so it would make sense to
store dentry.file.create_time in there rather than in i_ctime.

It seems that traditionally most file systems that cannot store ctime separately
just set i_ctime and i_mtime both to what is is modify_time here, though
fat and hpfs use i_ctime to refer to creation time.

      Arnd