btrfs: forbid deleting live subvol qgroup

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commit a8df356199 upstream.

If a subvolume still exists, forbid deleting its qgroup 0/subvolid.
This behavior generally leads to incorrect behavior in squotas and
doesn't have a legitimate purpose.

Fixes: cecbb533b5 ("btrfs: record simple quota deltas in delayed refs")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Boris Burkov 2024-01-10 17:30:00 -08:00 • committed by Greg Kroah-Hartman

parent 66b317a2fc

commit f98913c07c

1 changed files with 14 additions and 0 deletions

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fs/btrfs/qgroup.c

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