[CRIU] Fwd: Criu Restore Error

[Christopher Covington]

On 03/25/2015 01:33 PM, Christopher Covington wrote:
> Hi Priyanka,
> 
> On 03/25/2015 01:16 PM, Priyanka Naik wrote:
>> priyanka at priyanka-Lenovo-G510:~$ sudo mount -t 9p -o
>> trans=virtio,version=9p2000.L hostshare /tmp/host_files
>> mount: wrong fs type, bad option, bad superblock on hostshare,
>>        missing codepage or helper program, or other error
>>        (for several filesystems (e.g. nfs, cifs) you might
>>        need a /sbin/mount.<type> helper program)
>>        In some cases useful info is found in syslog - try
>>        dmesg | tail  or so
> 
> Try it from inside the guest.

Oh I forgot these aren't on by default--make sure the following kernel config
options are set:

CONFIG_NET_9P=y
CONFIG_NET_9P_VIRTIO=y
CONFIG_9P_FS=y

http://wiki.qemu.org/Documentation/9psetup#Preparation

Or load the corresponding modules if you've got them configured as modules.

Chris

>> On Wed, Mar 25, 2015 at 10:42 PM, Christopher Covington <cov at codeaurora.org
>> <mailto:cov at codeaurora.org>> wrote:
>>
>>     On 03/25/2015 01:00 PM, Priyanka Naik wrote:
>>     > This command ran successfully. Now how to access files from guest??
>>
>>     http://www.linux-kvm.org/page/9p_virtio
>>
>>     mkdir /tmp/host_files
>>     mount -t 9p -o trans=virtio,version=9p2000.L hostshare /tmp/host_files
>>
>>     > Another thing while accessing those files does my guest need to be shutdown??
>>
>>     I don't. It's based on a network filesystem.
>>
>>     Chris
>>
>>     > On Wed, Mar 25, 2015 at 10:15 PM, Christopher Covington <cov at codeaurora.org <mailto:cov at codeaurora.org>
>>     > <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>> wrote:
>>     >
>>     >     On 03/25/2015 12:25 PM, Priyanka Naik wrote:
>>     >     >
>>     >     > ---------- Forwarded message ----------
>>     >     > From: *Priyanka Naik* <prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com> <mailto:prnk.nk1 at gmail.com
>>     <mailto:prnk.nk1 at gmail.com>> <mailto:prnk.nk1 at gmail.com
>>     <mailto:prnk.nk1 at gmail.com>
>>     >     <mailto:prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com>>>>
>>     >     > Date: Wed, Mar 25, 2015 at 9:54 PM
>>     >     > Subject: Re: [CRIU] Criu Restore Error
>>     >     > To: Christopher Covington <cov at codeaurora.org
>>     <mailto:cov at codeaurora.org> <mailto:cov at codeaurora.org
>>     <mailto:cov at codeaurora.org>> <mailto:cov at codeaurora.org
>>     <mailto:cov at codeaurora.org>
>>     >     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>>>
>>     >     >
>>     >     >
>>     >     > I got these errors after running following command :
>>     >     >
>>     >     > root at priyanka-Lenovo-G510:/usr/bin# qemu-system-x86_64 -m 1024 -s -hda
>>     >     > vdisk.img -kernel /usr/src/linux-3.17.6/arch/x86_64/boot/bzImage
>>     -initrd
>>     >     > /home/priyanka/tmp2/newinitrd.img -append "root=/dev/sda10" -name
>>     myguest
>>     >     > -device virtio-serial -chardev
>>     socket,path=/tmp/foo,server,nowait,id=foo
>>     >     > -device virtserialport,chardev=foo,name=org.fedoraproject.port.0
>>     -fsdev
>>     >     > local,security_model=passthrough,id=fsdev0,path=/tmp/share -device
>>     >     > virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare
>>     >     >
>>     >     >
>>     >     > qemu-system-x86_64: -device
>>     >     > virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare: Virtio-9p
>>     Failed to
>>     >     > initialize fs-driver with id:fsdev0 and export path:/tmp/share
>>     >
>>     >     This fixed this error for me:
>>     >
>>     >     mkdir /tmp/share
>>     >
>>     >     Note that this is a host machine path.
>>     >
>>     >     Chris


-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project