From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:37572) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SwkAQ-0004gb-Rs for qemu-devel@nongnu.org; Wed, 01 Aug 2012 21:25:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1SwkAP-0001p2-M3 for qemu-devel@nongnu.org; Wed, 01 Aug 2012 21:25:34 -0400 Received: from indium.canonical.com ([91.189.90.7]:45320) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1SwkAP-0001op-GH for qemu-devel@nongnu.org; Wed, 01 Aug 2012 21:25:33 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.71 #1 (Debian)) id 1SwkAO-0007t4-Lv for ; Thu, 02 Aug 2012 01:25:32 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 89DC62E807D for ; Thu, 2 Aug 2012 01:25:32 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Thu, 02 Aug 2012 01:15:14 -0000 From: Kevin Shanahan Sender: bounces@canonical.com References: <20120721234521.2031.53549.malonedeb@chaenomeles.canonical.com> Message-Id: <20120802011514.11823.88652.malone@wampee.canonical.com> Errors-To: bounces@canonical.com Subject: [Qemu-devel] [Bug 1027525] Re: Unable to insert cd media located on ro nfs mount Reply-To: Bug 1027525 <1027525@bugs.launchpad.net> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Looks like the read_only flag in the block device state never gets set. This needs to be set otherwise qmp_change_blockdev tries to open the device read only. This patch works for me. ** Patch added: "Proposed fix" https://bugs.launchpad.net/qemu/+bug/1027525/+attachment/3245422/+files/= cdroms-are-read-only.patch -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1027525 Title: Unable to insert cd media located on ro nfs mount Status in QEMU: New Bug description: When issuing a "change" command via the monitor, qemu is unable to open the iso file if it is mounted on a read-only nfs share. If I mount read-write (and make sure the file is writable by the qemu process), then the change command succeeds. Note that this doesn't affect media specified on the command line when starting qemu, only when changing via the monitor. To reproduce, mount cd images directory read only, e.g. [root@kvmhost0 ~]# grep iso /etc/fstab 10.48.50.20:/iso /srv/kvm/iso nfs4 defaults,ro 0 0 Start qemu with minimal options, just need access to the monitor: [root@kvmhost0 ~]# kvm -vnc 127.0.0.1:0 -S Connect to the monitor and issue a change command: (qemu) change ide1-cd0 /srv/kvm/iso/ubuntu-12.04-server-amd64.iso Could not open '/srv/kvm/iso/ubuntu-12.04-server-amd64.iso Re-mount the iso directory read-write and notice that the command succeeds: [root@kvmhost0 ~]# mount -o remount,rw /srv/kvm/iso (qemu) change ide1-cd0 /srv/kvm/iso/ubuntu-12.04-server-amd64.iso (qemu) [root@kvmhost0 ~]# kvm --version QEMU emulator version 1.1.1 (qemu-kvm-1.1.1), Copyright (c) 2003-2008 Fab= rice Bellard [root@kvmhost0 ~]# uname -a Linux kvmhost0 3.4.5-1-ARCH #1 SMP PREEMPT Mon Jul 16 21:35:54 CEST 2012 = x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1027525/+subscriptions