From: Anand Suveer Jain <asj@kernel.org>
To: "Darrick J. Wong" <djwong@kernel.org>, Anand Jain <asj@kernel.org>
Cc: fstests@vger.kernel.org, linux-btrfs@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net, zlang@redhat.com,
hch@infradead.org
Subject: Re: [PATCH v7 04/11] fstests: add _require_unique_f_fsid() helper
Date: Wed, 22 Jul 2026 06:37:12 +0800 [thread overview]
Message-ID: <48637a77-b2ec-47e8-ac77-d397660c482b@kernel.org> (raw)
In-Reply-To: <20260701171122.GF6517@frogsfrogsfrogs>
> _require_unique_fsid(
> {
> case "$FSTYP" in
> ext*)
> # Ext4 derives f_fsid from the superblock UUID, meaning
> # clones share the same f_fsid until their UUIDs
> # diverge.
> _notrun "Target filesystem ($FSTYP) does not guarantee unique f_fsid on clones."
> ;;
> *)
> # Conversely, XFS, Btrfs, and F2FS ensure f_fsid remains
> # unique per filesystem instance (often by deriving it
> # from the UUID and underlying block device.)
> ;;
> fi
esac
> }
>
> --D
>
Yeah sure, suggestions applied.
Thanks, Anand
next prev parent reply other threads:[~2026-07-21 22:37 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-17 11:20 [PATCH v7 0/11] fstests: add test coverage for cloned filesystem ids Anand Jain
2026-06-17 11:20 ` [PATCH v7 01/11] fstests: add _loop_image_create_clone() helper Anand Jain
2026-07-01 17:07 ` Darrick J. Wong
2026-07-21 22:38 ` Anand Suveer Jain
2026-06-17 11:20 ` [PATCH v7 02/11] fstests: add _clone_mount_option() helper Anand Jain
2026-06-17 11:20 ` [PATCH v7 03/11] fstests: add FSNOTIFYWAIT_PROG Anand Jain
2026-06-17 11:20 ` [PATCH v7 04/11] fstests: add _require_unique_f_fsid() helper Anand Jain
2026-07-01 17:11 ` Darrick J. Wong
2026-07-21 22:37 ` Anand Suveer Jain [this message]
2026-06-17 11:20 ` [PATCH v7 05/11] fstests: verify fanotify isolation on cloned filesystems Anand Jain
2026-07-01 17:12 ` Darrick J. Wong
2026-07-21 22:36 ` Anand Suveer Jain
2026-06-17 11:20 ` [PATCH v7 06/11] fstests: verify f_fsid for " Anand Jain
2026-07-01 17:33 ` Darrick J. Wong
2026-07-21 22:36 ` Anand Suveer Jain
2026-07-21 22:57 ` Darrick J. Wong
2026-07-21 23:21 ` Anand Suveer Jain
2026-07-21 23:25 ` Darrick J. Wong
2026-06-17 11:20 ` [PATCH v7 07/11] fstests: verify libblkid resolution of duplicate UUIDs Anand Jain
2026-06-17 11:20 ` [PATCH v7 08/11] fstests: verify IMA isolation on cloned filesystems Anand Jain
2026-06-17 11:20 ` [PATCH v7 09/11] fstests: verify exportfs file handles " Anand Jain
2026-06-17 11:20 ` [PATCH v7 10/11] fstests: add _change_metadata_uuid helper Anand Jain
2026-06-17 11:20 ` [PATCH v7 11/11] fstests: test UUID consistency for clones with metadata_uuid Anand Jain
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