new fs, xfs_admin new label, metadata corruption detected

[Chris Murphy]

On Thu, Mar 17, 2016 at 2:57 PM, Dave Chinner <david at fromorbit.com> wrote:
> On Wed, Mar 16, 2016 at 08:39:21PM -0600, Chris Murphy wrote:
>> OK I can consistently reproduce this on the CLI. I end up with totally different
>>
>> # lvcreate -L 40g VG -n testxfs
>>   Logical volume "testxfs" created.
> ....
> [grow]
> ....
>> # xfs_repair -n /dev/VG/testxfs
>> Phase 1 - find and verify superblock...
>> Phase 2 - using internal log
>>         - zero log...
>>         - scan filesystem freespace and inode maps...
>> Metadata corruption detected at xfs_agf block 0x8c00008/0x1000
>> fllast 1014 in agf 7 too large (max = 1014)
>> Metadata corruption detected at xfs_agf block 0x6400008/0x1000
>> fllast 1014 in agf 5 too large (max = 1014)
>> Metadata corruption detected at xfs_agf block 0x5000008/0x1000
>> fllast 1014 in agf 4 too large (max = 1014)
>> Metadata corruption detected at xfs_agf block 0x7800008/0x1000
>> fllast 1014 in agf 6 too large (max = 1014)
>>         - found root inode chunk
>
> That's caused by commit 96f859d ("libxfs: pack the agfl header
> structure so XFS_AGFL_SIZE is correct") and growfs setting the
> last free list entry to something that a userspace without the
> commit  9fccb9f ("libxfs: pack the agfl header structure so
> XFS_AGFL_SIZE is correct") fails to validate correctly.
>
> i.e. update userspace to 4.5.0, and the repair noise will go away.

Yep. The problem is not reproducible with xfsprogs 4.5.0.


-- 
Chris Murphy