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


From: Eric Blake
Subject: Re: [Qemu-devel] [PATCH v3 2/5] blkdebug: Add pass-through write_zero and discard support
Date: Tue, 6 Dec 2016 16:18:59 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

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).

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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