From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Venkateswararao Jujjuri (JV)" Subject: Re: virtio-9p error Date: Thu, 26 Aug 2010 09:44:32 -0700 Message-ID: <4C7699F0.3050600@linux.vnet.ibm.com> References: <20100826043937.GA2777@c3sl.ufpr.br> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: kvm-devel , Qemu-development List , V9FS Developers To: Bruno Cesar Ribas Return-path: Received: from e9.ny.us.ibm.com ([32.97.182.139]:55171 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754306Ab0HZQog (ORCPT ); Thu, 26 Aug 2010 12:44:36 -0400 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by e9.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id o7QGQZYt021512 for ; Thu, 26 Aug 2010 12:26:35 -0400 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o7QGiYKC101160 for ; Thu, 26 Aug 2010 12:44:34 -0400 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id o7QGiX21011479 for ; Thu, 26 Aug 2010 10:44:34 -0600 In-Reply-To: <20100826043937.GA2777@c3sl.ufpr.br> Sender: kvm-owner@vger.kernel.org List-ID: Bruno Cesar Ribas wrote: > Hi, > > Every time I try to rsync something to my 9p fs mounted I get the following > message on guest kernel: > > 8<-------------------- > [ 45.866789] 9pnet_virtio virtio2: requests:id 0 is not a head! > 8<-------------------- > > I'm "sending" the FS with the following argument via qemu-kvm (commit head > 422476cc422 of August 12): > -virtfs local,path=/home/outras/montecristo,mount_tag=home,security_model=passthrough > > And I'm mounting on the guest with: > mount -t 9p -o trans=virtio home /home > > My guest is running kernel 2.6.34. I tested with the latest kernel, 2.6.35-rc6+ .. rsync -avz guest:/pmnt/rsync_dir/ /tmp/rsync_dir/ rsync /pmnt/rsync_dir/ /tmp/rsync_dir/ rsync -aHx --progress host:/tmp/rsync_dir/ /pmnt/rsync_dir/ This quick test is with QEMU patches that are on mailing lists but not merged into mainline. Being said that, I don't think they really affect this. > > After I start the rsync (a second later) i get the message i showed above > and the the virtio fs crashes and i have to reboot the virtual machine. > > Another 'interesting' thing is that the filesystem wont show in 'df'. But > appears correct in /proc/mounts This works only on 9P2000.L protocol. (Need "-o version=9p2000.L" option on the mount) But please note that, all the 9P2000.L protocol patches are not yet merged into QEMU. Thanks, JV > > 8<-------------------- > montecristo-nova:/home# mount|tail -1 > home on /home type 9p (rw,sync,dirsync,relatime,trans=virtio) > 8<-------------------- > > > Here is a little of my rsync output: > > 8<-------------------- > montecristo-nova:/home# cd nobackup/ > montecristo-nova:/home/nobackup# rsync -aHx --progress xadrezlivre:/ xadrezlivre/ > receiving incremental file list > rsync: symlink "/home/nobackup/xadrezlivre/cdrom" -> "media/cdrom" > failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/initrd.img" -> > "boot/initrd.img-2.6.26-1-486" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/initrd.img.old" -> > "boot/initrd.img-2.6.18-6-486" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/vmlinuz" -> > "boot/vmlinuz-2.6.26-1-486" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/vmlinuz.old" -> > "boot/vmlinuz-2.6.18-6-486" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/bin/nc" -> > "/etc/alternatives/nc" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/bin/netcat" -> > "/etc/alternatives/netcat" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/bin/pidof" -> > "../sbin/killall5" failed: No such file or directory (2) > rsync: symlink "/home/nobackup/xadrezlivre/bin/rnano" -> "nano" > failed: No such file or directory (2) > 8<-------------------- > > If anyone knows what it is or what else should I send to understand better > the problem, please tell me > > Thanks in advance >