Re: [PATCH v5 3/3] generic: basic smoke for filesystems on zoned block devices

["Darrick J. Wong" <djwong@kernel.org>]

On Tue, Oct 21, 2025 at 09:33:05AM +0000, Johannes Thumshirn wrote:
> On 10/20/25 8:21 AM, Johannes Thumshirn wrote:
> > On 10/18/25 4:05 PM, Zorro Lang wrote:
> >> On Sat, Oct 18, 2025 at 11:13:03AM +0000, Johannes Thumshirn wrote:
> >>> On 10/17/25 8:56 PM, Zorro Lang wrote:
> >>>> Does this mean the current FSTYP doesn't support zoned?
> >>>>
> >>>> As this's a generic test case, the FSTYP can be any other filesystems, likes
> >>>> nfs, cifs, overlay, exfat, tmpfs and so on, can we create zloop on any of them?
> >>>> If not, how about _notrun if current FSTYP doesn't support.
> >>> I did that in v1 and got told that I shouldn't do this.
> >> This's your V1, right?
> >> https://lore.kernel.org/fstests/20251007041321.GA15727@lst.de/T/#u
> >>
> >> Which line is "_notrun if current FSTYP doesn't support zloop creation"? And where is
> >> the message that told you don't to that? Could you provides more details, I'd like
> >> to learn about more, thanks :)
> > Ah sh*t, it was a non public 1st version. It had a check like this:
> >
> >
> > _require_zoned_support()
> > {
> >       case "$FSTYP"
> >       btrfs)
> >           test -f /sys/fs/btrfs/features/zoned
> >           ;;
> >       f2fs)
> >           test -f /sys/fs/f2fs/features/blkzoned
> >           ;;
> >       xfs)
> >           true
> >           ;;
> >       *)
> >           false
> >           ;;
> >       esac
> >
> > }
> >
> > But as xfs doesn't have a features sysfs entry Christoph said, it'll be
> > better to just _try_mkfs and see if there are any errors.
> >
> >
> Zorro,
> 
> Should I bring that helper back so all FSes but f2fs, btrfs and xfs are 
> skipped and then still use _try_mkfs so xfs without zoned RT support is 
> skipped?

Except for zonefs, I think you probably have to try mkfsing the zoned
block device to decide if the fs really works because the others all had
zone support added after the initial release.

--D