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Re: [Qemu-block] [PATCH 1/3] block: Allow x-blockdev-del on a BB with a

From: Kevin Wolf
Subject: Re: [Qemu-block] [PATCH 1/3] block: Allow x-blockdev-del on a BB with a monitor-owned BDS
Date: Tue, 9 Feb 2016 11:32:20 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

Am 08.02.2016 um 15:14 hat Alberto Garcia geschrieben:
> When x-blockdev-del is performed on a BlockBackend that has inserted
> media it will only succeed if the BDS doesn't have any additional
> references.
> The only problem with this is that if the BDS was created separately
> using blockdev-add then the backend won't be able to be destroyed
> unless the BDS is ejected first. This is an unnecessary restriction.
> Now that we have a list of monitor-owned BDSs we can allow
> x-blockdev-del to work in this scenario if the BDS has exactly one
> extra reference and that reference is from the monitor.
> Signed-off-by: Alberto Garcia <address@hidden>

This means that what you created with two blockdev-add commands would be
destroyed with a single blockdev-del command. I think we all agreed that
blockdev-add and blockdev-del should always come in pairs.


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