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Re: [Qemu-block] [Qemu-devel] [PATCH v2] qemu-img: Document --force-shar


From: Fam Zheng
Subject: Re: [Qemu-block] [Qemu-devel] [PATCH v2] qemu-img: Document --force-share / -U
Date: Mon, 11 Dec 2017 17:30:41 +0800
User-agent: Mutt/1.9.1 (2017-09-22)

On Fri, 12/08 09:54, Stefan Hajnoczi wrote:
> On Fri, Dec 08, 2017 at 09:44:56AM +0800, Fam Zheng wrote:
> > address@hidden --force-share (-U)
> > +
> > +If specified, @code{qemu-img} will open the image with shared permissions,
> > +which makes it less likely to conflict with a running guest's permissions 
> > due
> > +to image locking. For example, this can be used to get the image 
> > information
> > +(with 'info' subcommand) when the image is used by a running guest. Note 
> > that
> > +this could produce inconsistent result because of concurrent metadata 
> > changes,
> > +etc.
> 
> The documentation isn't clear on whether read-write is supported or just
> read-only.

block.c will emit an error if used with read-write. I will add a sentence for
that.

Fam



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