On 14.06.19 17:29, Vladimir Sementsov-Ogievskiy wrote:
> 13.06.2019 1:09, Max Reitz wrote:
>> When looking for a blkdebug node (which implements debug breakpoints),
>> use bdrv_primary_bs() to iterate through the graph, because that is
>> where a blkdebug node would be.
>>
>> Signed-off-by: Max Reitz <mreitz@redhat.com>
> 
> Honestly, don't know why blkdebug is always searched in ->file sequence,

Usually, blkdebug is just above the protocol node.  So

$format --file--> $protocol

becomes

$format --file--> blkdebug --file--> $protocol

This is why the existing code generally looks for blkdebug under the
->file link.

Max