Re: btrfs-progs: btrfs dev usa as non-root is wrong and should just abort

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

在 2024/7/11 13:25, Russell Coker 写道:
> On Thursday, 11 July 2024 13:47:59 AEST Qu Wenruo wrote:
>>> # btrfs dev usa -b /
>>> /dev/mapper/root, ID: 1
>>>
>>>      Device size:          511493395968
>>
>> The device size is 4K aligned.
>>
>> I guess it's some older fs? As newer mkfs would always round down to the
>> sector size.
>
> My recollection is that I had run mkfs on a system running Debian/Bookworm
> which had different hardware and then used dd to copy it to this one.
>
>>>      Device slack:               1536
>>>      Data,single:          231936622592
>>>      Metadata,DUP:         6442450944
>>>      System,DUP:             67108864
>>>      Unallocated:          273047212032
>>>
>>> $ btrfs dev usa -b /
>>> WARNING: cannot read detailed chunk info, per-device usage will not be
>>> shown, run as root
>>> /dev/mapper/root, ID: 1
>>>
>>>      Device size:           999010539
>>>      Device slack:         18446743563215167723
>>>      Unallocated:          511493394432
>>>>
>>>> And what's the version of the btrfs-progs?
>>>
>>> The Debian package version is 6.6.3-1.2+b1.
>>
>> It may be easier to debug by trying a newer version of btrfs-progs.
>>
>> And since I'm not sure if it's the unalignment causing problems, you may
>> want to resize the fs by:
>>
>> # btrfs device resize -1M <mnt>
>>
>> Then resize to max (which should always align the fs correctly):
>>
>> # btrfs device resize max <mnt>
>
> root@cupcakke:/tmp# btrfs fi resize 1:-1M  /
> Resize device id 1 (/dev/mapper/root) from 476.37GiB to 476.36GiB
> root@cupcakke:/tmp# btrfs fi resize 1:max  /
> Resize device id 1 (/dev/mapper/root) from 476.36GiB to max
>
> etbe@cupcakke:/tmp$ btrfs dev usa -b /
> WARNING: cannot read detailed chunk info, per-device usage will not be shown,
> run as root
> /dev/mapper/root, ID: 1
>     Device size:           999010539
>     Device slack:         18446743563215167723
>     Unallocated:          511493394432

What about the usage output using root privilege?

Just want to be sure that the fs is properly resized to be 4K aligned.

>
> etbe@cupcakke:/tmp$ btrfs dev usa /
> WARNING: cannot read detailed chunk info, per-device usage will not be shown,
> run as root
> /dev/mapper/root, ID: 1
>     Device size:           952.73MiB
>     Device slack:           16.00EiB
>     Unallocated:           476.37GiB
>
> That doesn't seem to have changed anything.
>
And what about newer progs?

Thanks,
Qu