Re: [Qemu-devel] 9pfs troubles (was Re: [PATCH 1/4] hw/9pfs: fix error handing in local_ioc_getversion())

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

"Michael S. Tsirkin" <mst@redhat.com> writes:

> On Mon, Feb 03, 2014 at 03:05:10PM +0530, Aneesh Kumar K.V wrote:
>> "Michael S. Tsirkin" <mst@redhat.com> writes:
>> 
>> > Haven't used 9pfs in a while.
>> > I thought these patches are a good time to play with it some more.
>> > I have encountered two issues.
>> >
>> > What I'm doing:
>> > host: qemu a75143eda2ddf581b51e96c000974bcdfe2cbd10.
>> >
>> > /scm/qemu/x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 1g -cpu kvm64
>> > -smp 2  f20-x64.qcow2  -netdev user,id=foo -redir tcp:8022::22 -device
>> > virtio-net,netdev=foo  -serial stdio -fsdev
>> > local,security_model=none,id=fsdev0,path=/lib/modules/ -device
>> > virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=libmodulesshare -fsdev
>> > local,security_model=none,id=fsdev1,path=/boot -device
>> > virtio-9p-pci,id=fs1,fsdev=fsdev0,mount_tag=bootshare -no-reboot
>> > -snapshot
>> >
>> > guest: Fedora 20
>> >
>> > added this in /etc/fstab:
>> >
>> > bootshare       /share/boot     9p      trans=virtio,version=9p2000.L 0 0
>> > libmodulesshare /share/lib/modules      9p trans=virtio,version=9p2000.L 0 0
>> >
>> >
>> > I have encountered two issues:
>> >
>> > 1. mount failure on boot
>> > If I try to mount on boot through fstab, I get:
>> > [    2.270157] 9pnet: Could not find request transport: virtio
>> > [    2.270158] 9pnet: Could not find request transport: virtio
>> 
>> 
>> Missing 9pnet_virtio.ko module ? 
>
> Maybe it's loaded too late. But when I get to plymouth prompt
> it's loaded fine.
>
>> >
>> > If I then re-try mount, it succeeds immediately!
>> >
>> > Some kind of dependency issue?
>> >
>> > 2. files immediately in the mounted directory aren't visible on the
>> > guest under /share/boot.
>> > For example, files under /boot on host are not visible
>> > on guest, files under child directories seem visible.
>> 
>> 
>> can you share more details on this ? /boot permissions. ls -al output on
>> host etc.
>> 
>> -aneesh
>
> for /boot:
> dr-xr-xr-x. 7 root root 12288 Feb  2 23:41 /boot/
>
> $ ls -la
> total 739740
> dr-xr-xr-x.  7 root root    12288 Feb  2 23:41 .
> dr-xr-xr-x. 22 root root     4096 Feb  2 19:16 ..
> -rw-r--r--.  1 root root   138741 Dec 23 19:19 config-3.12.6-200.fc19.i686
> -rw-r--r--.  1 root root   138724 Jan 10 18:06 config-3.12.7-200.fc19.i686
> -rw-r--r--.  1 root root   138724 Jan 16 06:43
> config-3.12.8-200.fc19.i686


Related to SELinux errors ? can you double check you don't selinux
errors.

Can you also share the file listing on the guest ?  Also are you able to
reproduce this when running qemu as root user ?

-aneesh