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Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help. |
Date: |
Mon, 12 May 2014 10:32:26 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
On 05/12/2014 10:05 AM, Mike Day wrote:
> On Mon, May 12, 2014 at 11:53 AM, Eric Blake <address@hidden> wrote:
>> Ah, but it is:
>>
>> $ qemu-img create -f qcow2 -o help
>> Supported options:
>> size Virtual disk size
>> compat Compatibility level (0.10 or 1.1)
>> backing_file File name of a base image
>> backing_fmt Image format of the base image
>> encryption Encrypt the image
>> cluster_size qcow2 cluster size
>> preallocation Preallocation mode (allowed values: off, metadata)
>> lazy_refcounts Postpone refcount updates
>>
>> and more importantly, it only appears in the help output of -f modes
>> that actually support a backing file. Contrast:
>>
>> $ qemu-img create -f raw -o help
>> Supported options:
>> size Virtual disk size
>
> This is much more prominent in the top-level help:
>
> rebase [-q] [-f fmt] [-t cache] [-p] [-u] -b backing_file [-F
> backing_fmt] filename
'rebase' lacks -o; so it must continue to document -b. This thread was
started in context to the 'create' subcommand, not the 'rebase'
subcommand. (Arguably, we may need to add -o to rebase someday, but
that's not for this patch)
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Kevin Wolf, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help.,
Eric Blake <=
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Kevin Wolf, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Eric Blake, 2014/05/12
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Kevin Wolf, 2014/05/13
- Re: [Qemu-devel] [PATCH] Add backing file option to qemu-img create help., Mike Day, 2014/05/12