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Date: Wed, 22 Oct 2025 09:34:29 +0200
From: hch <hch@lst.de>
To: Zorro Lang <zlang@redhat.com>
Cc: "Darrick J. Wong" <djwong@kernel.org>,
	Johannes Thumshirn <Johannes.Thumshirn@wdc.com>, hch <hch@lst.de>,
	Naohiro Aota <Naohiro.Aota@wdc.com>,
	"linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>,
	Hans Holmberg <Hans.Holmberg@wdc.com>,
	"fstests@vger.kernel.org" <fstests@vger.kernel.org>,
	"linux-xfs@vger.kernel.org" <linux-xfs@vger.kernel.org>,
	Carlos Maiolino <cem@kernel.org>,
	Carlos Maiolino <cmaiolino@redhat.com>
Subject: Re: [PATCH v5 3/3] generic: basic smoke for filesystems on zoned
 block devices
Message-ID: <20251022073429.GA7845@lst.de>
References: <20251016152032.654284-1-johannes.thumshirn@wdc.com> <20251016152032.654284-4-johannes.thumshirn@wdc.com> <20251017185633.pvpapg5gq47s2vmm@dell-per750-06-vm-08.rhts.eng.pek2.redhat.com> <0d05cde5-024b-4136-ad51-9a56361f4b51@wdc.com> <20251018140518.2xlpmmqajgaeg7xq@dell-per750-06-vm-08.rhts.eng.pek2.redhat.com> <8253d6b9-e98b-4a05-80c0-f255ec32ee38@wdc.com> <16e539fe-b9f0-4645-b135-3930df249eab@wdc.com> <20251021144920.GH3356773@frogsfrogsfrogs> <20251022072442.lnu5d7chvtqn6zuj@dell-per750-06-vm-08.rhts.eng.pek2.redhat.com>
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On Wed, Oct 22, 2025 at 03:24:42PM +0800, Zorro Lang wrote:
> As this's a generic test case, so there're 2 questions from me:
> 1) Can all FSTYPs (on SCRATCH_MNT) be the underlying fs of a zloop device?

Yes.

> 2) Can all FSTYPs works on zloop device?

No.

> If the 1st question is "yes", but looks like the `_try_mkfs_dev $zloop` restricts the
> FSTYP from being un-localfs (e.g. nfs, cifs, afs, overlay etc:)

Yes, we had this come up before, this test should be limited
to block based file system.  I.e. probably a
_require_block_device on $SCRATCH_DEV even if that's not strictly
speaking the exactly correct check.