On Tue, Jul 09, 2024 at 10:51:04AM -0700, Boris Burkov wrote:
> 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@xxxxxx>
Reviewed-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
Thanks,
Josef
