[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Re: qemu-img help missing backing file
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] Re: qemu-img help missing backing file |
Date: |
Tue, 30 Mar 2010 14:49:20 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3 |
Am 30.03.2010 14:32, schrieb Alexander Graf:
>
> On 30.03.2010, at 14:30, Kevin Wolf wrote:
>
>> Am 30.03.2010 14:22, schrieb Alexander Graf:
>>> Howdy,
>>>
>>> I just wanted to create a backed qcow2 image and was irritated by qemu-img
>>> not showing me the correct command line option. It's just missing from the
>>> list:
>> [...]
>>> Is this intentional? The actual command still works:
>>>
>>>> address@hidden:~/git/qemu> qemu-img-kvm create -f qcow2 -b
>>>> /media/studio/images/SUSE/s390/sles11.raw /dev/shm/sles11-zipl.qcow2
>>>> Formatting '/dev/shm/sles11-zipl.qcow2', fmt=qcow2 size=21474836480
>>>> backing_file='/media/studio/images/SUSE/s390/sles11.raw' encryption=off
>>>> cluster_size=0
>>
>> -b still works to maintain compatibility with older versions. The
>> documented way is -o backing_file=foo (the qemu-img output you quote
>> even contains this option).
>
> Interesting O_o. Maybe it'd be a good idea to give some examples in the help
> output? The same way the -e and -b options were having examples there too.
> That really makes them easier to find.
Feel free to submit a patch. ;-)
Examples sound like an easy way to make these features more visible
again. Even better, but a bit more work, would be to include a
dynamically generated list of all supported options like this:
backing_file: File name of a base image (qcow, qcow2, vmdk)
backing_fmt: Image format of the base image (qcow2)
encryption: Encrypt the image (qcow, qcow2)
Kevin