Re: [Qemu-devel] [PATCH v3 2/5] blkdebug: Add pass-through write_zero and discard support

[Max Reitz <mreitz@redhat.com>]

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On 06.12.2016 23:18, Eric Blake wrote:
> On 12/06/2016 04:14 PM, Max Reitz wrote:
>> On 06.12.2016 23:12, Eric Blake wrote:
>>> On 12/06/2016 04:00 PM, Max Reitz wrote:
>>>
>>>>> Tested by setting up an NBD server with export 'foo', then invoking:
>>>>> $ ./qemu-io
>>>>> qemu-io> open -o driver=blkdebug blkdebug::nbd://localhost:10809/foo
>>>
>>> By the way, I'd LOVE to know if there is a way to write a qemu-io
>>> command line that would do this connection automatically (so that I can
>>> batch commands up front and benefit from the shell's history) rather
>>> than having to issue an 'open' after the fact.  I tried various
>>> incantations with --object and --image-opts, but got stumped.
>>
>> Can't you just do qemu-io -c 'open'?
> 
> I suppose that would get command-line history.  But I still want
> interactive mode.  The moment you use -c, ALL commands get run
> back-to-back without stopping, so I'd have to add additional -c
> 'read'/'write' commands up front. I like interactive mode (open
> pre-connected, now let me explore the image at will).

Well, the usual --image-opts version would be:

./qemu-io --image-opts driver=blkdebug,image.driver=nbd,\
image.host=localhost,image.export=foo

Max


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