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[Qemu-devel] [Bug 1018530] Re: No write access in a 9p/virtfs shared fol
From: |
M. Mohan Kumar |
Subject: |
[Qemu-devel] [Bug 1018530] Re: No write access in a 9p/virtfs shared folder |
Date: |
Wed, 11 Jul 2012 06:09:35 -0000 |
Georg,
pass-through security model needs root privilege, if you want to run
qemu as non-root user either you have to use mapped security model or
proxy fs driver. But libvirt does not have support for proxy FS driver.
I posted a patch few months ago to libvirt for enabling the same. I will
do the followup with libvirt list to enable proxy FS in libvirt.
So could you please try mapped security model or run qemu as root user
and update the results?
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https://bugs.launchpad.net/bugs/1018530
Title:
No write access in a 9p/virtfs shared folder
Status in QEMU:
New
Status in “qemu-kvm” package in Ubuntu:
Fix Released
Bug description:
Ubuntu version: Ubuntu 12.04 LTS
Kernel: 3.2.0-25-generic
Version of qemu-kvm: 1.0+noroms-0ubuntu13
I have created an shared folder for an virtual machine which is
managed by libvirt.
<filesystem type='mount' accessmode='passthrough'>
<source dir='/storage/data'/>
<target dir='data'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
</filesystem>
I mounted it in the virtual machine with this command: mount -t 9p -o
trans=virtio,version=9p2000.L data /data
The filesystem permissions of all files an folders in the shared folder are
set to 777. I expected that I have the full permissions also in the virtual
machine.
Regardless of the permissions on the filesystem I cannot write or create
files and folders in the virtual machine. The original filesystem (/storage) is
XFS.
In another shared folder (similar config in libvirt) which is originally NTFS
I have no problems.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: qemu-kvm 1.0+noroms-0ubuntu13
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Wed Jun 27 20:15:20 2012
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Beta amd64
(20120409)
MachineType: To be filled by O.E.M. To be filled by O.E.M.
ProcEnviron:
TERM=xterm
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-25-generic
root=/dev/mapper/system-root ro
SourcePackage: qemu-kvm
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/18/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1208
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A99X EVO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1208:bd04/18/2012:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A99XEVO:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.
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