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From: Nikolay Borisov <nborisov@suse.com>
To: linux-btrfs@vger.kernel.org
Subject: Re: where is the parent of a snapshot?
Date: Fri, 9 Jul 2021 13:49:27 +0300	[thread overview]
Message-ID: <b828b671-65db-c6d7-5622-83b8187c692f@suse.com> (raw)
In-Reply-To: <20210709102653.GC1548@tik.uni-stuttgart.de>



On 9.07.21 г. 13:26, Ulli Horlacher wrote:
> On Fri 2021-07-09 (12:07), Nikolay Borisov wrote:
> 
>>> root@unifex:/# btrfs subvolume show /mnt/spool
>>> /
>>>         Name:                   <FS_TREE>
>>>         UUID:                   7f010d85-b761-45e7-8d4a-453f81bb10b2
>>>         Parent UUID:            -
>>>         Received UUID:          -
>>> (...)
>>>
>>> root@unifex:/# btrfs filesystem show /mnt/spool
>>> Label: none  uuid: 217ccc65-6ab9-44f0-b691-ec9bbcdd9496
>>>         Total devices 2 FS bytes used 209.81GiB
>>>         devid    1 size 14.55TiB used 161.02GiB path /dev/loop0
>>>         devid    2 size 14.55TiB used 100.00GiB path /dev/loop1
>>>
>>> The filesystem has different uuid than the root subvolume?!
>>
>> Yes, it's been like that forever.
> 
> No:
> 
> root@fex:~# btrfs version
> btrfs-progs v4.15.1

Which kernel version is that with?

> 
> root@fex:~# btrfs subvolume show /mnt/spool
> /
>         Name:                   <FS_TREE>
>         UUID:                   -
>         Parent UUID:            -
>         Received UUID:          -
>         Creation time:          -
>         Subvolume ID:           5
>         Generation:             85112
>         Gen at creation:        0
>         Parent ID:              0
>         Top level ID:           0
>         Flags:                  -
> 
> root@fex:~# btrfs filesystem show /mnt/spool
> Label: none  uuid: dfece157-dd48-4868-b4a3-51e539325aaa
>         Total devices 1 FS bytes used 1.85TiB
>         devid    1 size 14.55TiB used 1.90TiB path /dev/loop0
> 
> There is no UUID on the root subvolume!
> 

  reply	other threads:[~2021-07-09 10:49 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-08 21:38 where is the parent of a snapshot? Ulli Horlacher
2021-07-09  5:03 ` Andrei Borzenkov
2021-07-09  7:15   ` Ulli Horlacher
2021-07-09  7:21     ` Hugo Mills
2021-07-09  7:37       ` Ulli Horlacher
2021-07-09  7:48         ` Ulli Horlacher
2021-07-09  8:09           ` Remi Gauvin
2021-07-09  8:45             ` Ulli Horlacher
2021-07-09  9:02               ` Remi Gauvin
2021-07-09  9:07               ` Nikolay Borisov
2021-07-09 10:26                 ` Ulli Horlacher
2021-07-09 10:49                   ` Nikolay Borisov [this message]
2021-07-09 11:29                     ` Ulli Horlacher

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