virtio-9p error

Bruno Cesar Ribas
2010-08-26T04:39:41Z

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.

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

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

--
Bruno Ribas - ribas@c3sl.ufpr.br
http://www.inf.ufpr.br/ribas
C3SL: http://www.c3sl.ufpr.br