btrfs: add test for subvolid reuse with squota
Squotas are likely to leave qgroups that outlive deleted subvolids.
Before the kernel patch
2b8aa78cf127 ("btrfs: qgroup: fix qgroup id collision across mounts")
this would lead to a repeated subvolid which would collide on an
existing qgroup id and error out with EEXIST. In snapshot creation, this
would lead to a read only fs.
Add a test which exercises the path that could create duplicate
subvolids but with squotas enabled, which should avoid the trap.
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>
[zlang: Remove _supported_fs line]
2 files changed
