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Re: [Qemu-block] [PATCH 2/4] block/vpc: tests for auto-detecting VPC and

From: Max Reitz
Subject: Re: [Qemu-block] [PATCH 2/4] block/vpc: tests for auto-detecting VPC and Hyper-V VHD images
Date: Wed, 24 Feb 2016 16:44:21 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0

On 24.02.2016 16:40, Jeff Cody wrote:
> On Wed, Feb 24, 2016 at 11:23:29AM +0100, Kevin Wolf wrote:
>> Am 24.02.2016 um 01:47 hat Jeff Cody geschrieben:
>>> This tests auto-detection, and overrides, of VHD image sizes created
>>> by Virtual PC and Hyper-V.
>>> This adds two sample images:
>>> hyperv2012r2-dynamic.vhd.bz2 - dynamic VHD image created with Hyper-V
>>> virtualpc-dynamic.vhd.bz2    - dynamic VHD image created with Virtual PC
>>> Signed-off-by: Jeff Cody <address@hidden>
>>> +echo
>>> +echo === Testing VPC Autodetect ===
>>> +echo
>>> +_use_sample_img virtualpc-dynamic.vhd.bz2
>>> +
>>> +_launch_qemu -drive file="${TEST_IMG}",id=disk,format=vpc
>>> +h1=$QEMU_HANDLE
>>> +
>>> +_send_qemu_cmd $h1 'qemu-io disk "map"' "sectors"
>>> +_send_qemu_cmd $h1 'quit' ""
>> I would avoid the big hammer of starting qemu processes when qemu-io can
>> test the same:
>> $QEMU_IO -c "open -o file=${TEST_IMG},id=disk,format=vpc" -c "map"
>> Kevin
> The reason I used a qemu process before, was difficulty passing in the
> drive options to qemu-io.  I futzed around a bit with the new
> --image-opts, but I hadn't tried "file=" in the open command with -o,
> so I felt a bit silly after your email.
> However, this doesn't seem to work, now that I've tried it.  Is it
> broken, or am I doing something wrong?  Here is what I get:
> # ./qemu-io -c "open -o file=/tmp/hyperv2012r2-dynamic.vhd,format=vpc" -c 
> "map"
> can't open: Cannot find device=/tmp/hyperv2012r2-dynamic.vhd nor 
> node_name=/tmp/hyperv2012r2-dynamic.vhd


$QEMU_IO -c "open -o driver=vpc ${TEST_IMG}"


> Technically, I could just rely on image format autodetection since the
> current test images are dynamic and not fixed, and use -o to pass the
> vpc specific options.  I just hate to rely on autodetection anymore.
> -Jeff

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