[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-btrfs
Subject:    Re: [PATCH 3/3] btrfs: allow BTRFS_IOC_SNAP_DESTROY_V2 to remove ghost subvolume
From:       Qu Wenruo <quwenruo.btrfs () gmx ! com>
Date:       2021-06-30 13:35:57
Message-ID: 6cc162f0-65c5-98a9-14f2-9dde7d6216ea () gmx ! com
[Download RAW message or body]



On 2021/6/30 下午9:30, David Sterba wrote:
> On Wed, Jun 30, 2021 at 09:26:20PM +0800, Qu Wenruo wrote:
>>> Is there a way to list such subvolumes from progs?
>>
>> No, root with 0 ref will not show up in "btrfs subv list".
>
> We might need one then, but I'll read the full report, maybe it's a
> one-off bug.
>
>> In fact unless we pass @check_ref = false, btrfs_get_fs_root() won't
>> return such ghost root at all.
>
> In progs the subvolumes are searched directly by the key, so this
> (kernel function) is not relevant.
>
Anyway, you can use the test image from the btrfs-progs patchset to test
btrfs-progs modification.

THanks,
Qu
[prev in list] [next in list] [prev in thread] [next in thread]