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Re: [Qemu-devel] Regression opening read-only cdroms
From: |
Richard W.M. Jones |
Subject: |
Re: [Qemu-devel] Regression opening read-only cdroms |
Date: |
Thu, 18 Jun 2009 13:37:59 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Tue, Jun 16, 2009 at 03:33:00PM +0100, Jamie Lokier wrote:
> Avi Kivity wrote:
> > qemu used to be quite happy opening read-only cdrom images, and I was
> > quite happy feeding kvm-autotest a library of read-only iso images.
>
> 1. While we're here, an _option_ to open an image read-only even when
> you have write permission would be useful, for those occasions when
> you want to boot from some valuable image and be certain you aren't
> modifying it - without having to chmod back and forth in
> Qemu-wrapper scripts, or copy the image first.
FWIW we went round the houses on this one for libguestfs and settled
on using '-drive ...,snapshot=on' instead. The guest sees the drive
as writable, and any writes are discarded when libguestfs/qemu quits.
Rich.
--
Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones
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Re: [Qemu-devel] Regression opening read-only cdroms, Avi Kivity, 2009/06/16
Re: [Qemu-devel] Regression opening read-only cdroms,
Richard W.M. Jones <=
Re: [Qemu-devel] Regression opening read-only cdroms, Blue Swirl, 2009/06/16