btrfs: use on-disk uuid for s_uuid in temp_fsid mounts

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When mounting a cloned filesystem with a temporary fsuuid (temp_fsid),
layered modules like overlayfs require a persistent identifier.

While internal in-memory fs_devices->fsid must remain unique to
the kernel module, let s_uuid carry the original on-disk UUID.

Signed-off-by: Anand Jain <asj@kernel.org>
Signed-off-by: David Sterba <dsterba@suse.com>

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Anand Jain 2026-04-27 18:18:03 +08:00 • committed by Johannes Thumshirn

parent 5d40d064db

commit df84f6c773

1 changed files with 10 additions and 1 deletions

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fs/btrfs/disk-io.c

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