Re: [Qemu-devel] Regression opening read-only cdroms

[Blue Swirl <blauwirbel@gmail.com>]

On 6/16/09, Avi Kivity <avi@redhat.com> 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.  However since
>
>    commit 0e1d8f4c549e51fd19793a154862979fdc199477
>    Author: Christoph Hellwig <hch@lst.de>
>    Date:   Mon Jun 15 13:53:26 2009 +0200
>
>         raw-posix: always store open flags
>
>         Both the Linux floppy and the FreeBSD CDROM host device need to
>    store
>         the open flags so that they can re-open the device later.   Store
> the
>         open flags unconditionally to remove the ifdef mess and simply the
>         calling conventions for the later patches in the series.
>
>         Signed-off-by: Christoph Hellwig <hch@lst.de>
>
>  this state of happiness no longer exists.
>
>  Can you look at what caused this?

How about these:
- open_flags = O_BINARY;
+ s->open_flags |= O_BINARY;
- open_flags = O_BINARY;
+ s->open_flags |= O_BINARY;