virtio-9p error

virtio-9p error

[Bruno Cesar Ribas]

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

Re: virtio-9p error

[Venkateswararao Jujjuri (JV)]

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
> 

Re: virtio-9p error

[Bruno Cesar Ribas]

On Thu, Aug 26, 2010 at 09:44:32AM -0700, Venkateswararao Jujjuri (JV) wrote:
> Bruno Cesar Ribas wrote:
> > Hi,
> > 
> [snip]
> 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.

is there any work to bring these patches to mainline?

There's no imprevement on virtio-9p in qemu since my first email.

> > [snip]
> 

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

Re: virtio-9p error

[Venkateswararao Jujjuri (JV)]

Bruno Cesar Ribas wrote:
> On Thu, Aug 26, 2010 at 09:44:32AM -0700, Venkateswararao Jujjuri (JV) wrote:
>> Bruno Cesar Ribas wrote:
>>> Hi,
>>>
>> [snip]
>> 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.
> 
> is there any work to bring these patches to mainline?
> 
> There's no imprevement on virtio-9p in qemu since my first email.

I sent a new revision on Thursday. I am expecting that they will go in anytime.

Last time I talked to Anthony, he is planning on taking these patches soon.

Thanks,
JV

> 
>>> [snip]
> 

Re: virtio-9p error

[Venkateswararao Jujjuri (JV)]

On 9/7/2010 9:41 AM, Venkateswararao Jujjuri (JV) wrote:
> Bruno Cesar Ribas wrote:
>> On Thu, Aug 26, 2010 at 09:44:32AM -0700, Venkateswararao Jujjuri (JV) wrote:
>>> Bruno Cesar Ribas wrote:
>>>> Hi,
>>>>
>>> [snip]
>>> 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.
>>
>> is there any work to bring these patches to mainline?
>>
>> There's no imprevement on virtio-9p in qemu since my first email.
>
> I sent a new revision on Thursday. I am expecting that they will go in anytime.
>
> Last time I talked to Anthony, he is planning on taking these patches soon.

Hello, now the patches are on the mainline tree. Please try them out.

Thanks,
JV

>
> Thanks,
> JV
>
>>
>>>> [snip]
>>
>
>
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