From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MGZip-00014q-9Y for qemu-devel@nongnu.org; Tue, 16 Jun 2009 10:33:11 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MGZik-000147-4A for qemu-devel@nongnu.org; Tue, 16 Jun 2009 10:33:10 -0400 Received: from [199.232.76.173] (port=32925 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MGZij-000144-Sz for qemu-devel@nongnu.org; Tue, 16 Jun 2009 10:33:05 -0400 Received: from mail2.shareable.org ([80.68.89.115]:52608) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1MGZij-0000uN-IZ for qemu-devel@nongnu.org; Tue, 16 Jun 2009 10:33:05 -0400 Date: Tue, 16 Jun 2009 15:33:00 +0100 From: Jamie Lokier Subject: Re: [Qemu-devel] Regression opening read-only cdroms Message-ID: <20090616143259.GA29040@shareable.org> References: <4A37896C.8050208@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A37896C.8050208@redhat.com> List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: Christoph Hellwig , qemu-devel 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. 2. Would it make sense to open CD-ROM images read-only all the time, when they are opened with media=cdrom, or can QEMU's CD-ROM devices write to the images? -- Jamie