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Re: [Qemu-devel] [PATCH v6 16/25] block: Add 'base-directory' BDS option


From: Alberto Garcia
Subject: Re: [Qemu-devel] [PATCH v6 16/25] block: Add 'base-directory' BDS option
Date: Tue, 07 Nov 2017 13:07:40 +0100
User-agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu)

On Thu 02 Nov 2017 11:06:28 PM CET, Eric Blake wrote:

>>>> Using this option, one can directly override what bdrv_dirname()
>>>> will return. This is useful if one uses e.g. qcow2 on top of quorum
>>>> (with only protocol BDSs under the quorum BDS) and wants to be able
>>>> to use relative backing filenames.
>>>>
>>>> Signed-off-by: Max Reitz <address@hidden>
>>>
>>> Who would be using this option in practice? I understand that
>>>management tools should be using always absolute filenames, and this
>>>API doesn't seem so convenient for humans.
>> 
>> Hmmm.  I seem to recall Eric liked it a couple of years ago when he
>> was still more on the libvirt side of things. :-)
>
> Ideally, libvirt should be using node names rather than filenames
> (whether absolute or relative); but I still think it could be
> something that turns out to be useful.

But what would be the use case? For a management tool it's not more
convenient to use relative file names, or is it?

Berto



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