On Thu, Feb 06, 2014 at 06:28:32PM +0530, Aneesh Kumar K.V wrote: > "Michael S. Tsirkin" <m...@redhat.com> writes: > > > On Tue, Feb 04, 2014 at 12:51:25PM +0530, Aneesh Kumar K.V wrote: > >> "Michael S. Tsirkin" <m...@redhat.com> writes: > >> > >> > On Mon, Feb 03, 2014 at 03:05:10PM +0530, Aneesh Kumar K.V wrote: > >> >> "Michael S. Tsirkin" <m...@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. > > > > Any idea about this one? Do you have guests with 9pfs > > and virtio as modules and 9pfs mounted from /etc/fstab? > > No, I generally have everything builtin for guest.
Heh that's the problem then :) Try making it modular and I think you will see the problem. > > > >> >> > > >> >> > 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. > > > > No, I didn't see any selinux errors. > > Also was able to stat and read files as a regular user. > > > >> Can you also share the file listing on the guest ? > > > > Interestingly, the problem seems to be partially gone. > > Not sure what did I change > > What I do still see now is this: > > > > Host: > > $ ls -l /boot/initramfs-3.11.0-rc5-mst.img > > -rw-------. 1 root root 7659204 Aug 18 13:21 > > /boot/initramfs-3.11.0-rc5-mst.img > > Guest: > > ls -l /share/initramfs-3.11.0-rc5-mst.img > > ls: cannot access /share/initramfs-3.11.0-rc5-mst.img: Permission denied > > > > > > So you are able to stat the file as the same user the qemu is running > ?. That is strange. I am not able to reproduce the problem. You could > possibly instrument the virtio-9p-local.c and see the exact error ? > > -aneesh Sure, send me debug patch I'll apply and try it. -- MST
