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Re: [Qemu-devel] Regression opening read-only cdroms
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] Regression opening read-only cdroms |
Date: |
Tue, 16 Jun 2009 15:54:21 +0100 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Stefano Stabellini wrote:
> 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.
>
>
> Indeed.
> I have a patch that adds bdrv_set_read_only that set bs->read_only = 1
> so that bdrv_open2 can check if the flag is set and act accordingly.
> The problem is that in xen we read whether the device should be opened
> read only in the VM config file, I don't think the user can specify to
> open a drive read-only in qemu.
What's missing is a "ro" sub-option to "-drive".
-- Jamie
- [Qemu-devel] Regression opening read-only cdroms, Avi Kivity, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Jamie Lokier, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Stefano Stabellini, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms,
Jamie Lokier <=
- Re: [Qemu-devel] Regression opening read-only cdroms, Anthony Liguori, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Stefano Stabellini, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Jamie Lokier, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Avi Kivity, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Jamie Lokier, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Jamie Lokier, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Gerd Hoffmann, 2009/06/16
- Re: [Qemu-devel] Regression opening read-only cdroms, Avi Kivity, 2009/06/17
Re: [Qemu-devel] Regression opening read-only cdroms, Avi Kivity, 2009/06/16