Re: [PATCH v2] btrfs-progs: force overwrite should wipe stale SB

[Anand Jain <Anand.Jain@oracle.com>]

  Thanks.
Anand

On 10/10/2014 03:39 PM, David Sterba wrote:
> On Thu, Oct 02, 2014 at 07:22:09AM +0800, Anand Jain wrote:
>> (I am unable to reproduce the issue, tried to go back with progs versions
>> but still the same. So as of now this code remains untested, suggest to
>> wait till we have a reproducible test case).
>>
>> Here is a test case which says it all..
>>
>> mkfs.xfs -f $DEV
>> mkfs.btrfs -f $DEV
>> mount $DEV $MNT
>> mount: /dev/vdiskc: more filesystems detected. This should not happen,
>>         use -t <type> to explicitly specify the filesystem type or
>>         use wipefs(8) to clean up the device.
>>
>> mount: you must specify the filesystem type
>>
>> with this patch btrfs_prepare_device() also wipes old FS if any,
>> btrfs_prepare_device() is called after we have verified that
>> user has provided -f option.
>>
>> v2: to satisfy the backward compatibility issue, replace
>> blkid_do_wipe() with local wipe function.
>
> Thank you, works for me, added to 3.17 queue.
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