[Libvirt-cim] RFC : Introducing new CIM_RES_TYPE for 9pfs support on QEMU/KVM environment

[Sharad Mishra]

> Deepak Shetty <deepakcs at linux.vnet.ibm.com>
> Sent by: libvirt-cim-bounces at redhat.com
>
> 12/01/2011 06:23 AM
>
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> [Libvirt-cim] RFC : Introducing new CIM_RES_TYPE for 9pfs support on
> QEMU/KVM environment
>
> Hi All,
>     I need some help and inputs on the below.
>
> 1) I am looking at adding support for 9pfs ( 9p file system) in
> libvirt-cim. NOTE the support for the same already exists  in libvirt &
> qemu.
>
> 2) Using 9pfs support, user can export a host file system to the guest (
> domain). It uses the virtio framework, so its a passthru file system.
> NOTE: This support is exported as a 9p-virtio-device to the guest. Each
> host export path is exported as a pseudo 9p device to the guest.
> NOTE: This is currently supported only in qemu/kvm environment.
>
> 3) The xml tags related to 9pfs in libvirt are... an example below...
>
> <filesystem type='mount'>
> <driver type='handle'/>
> <source dir='/tmp/virt1'/>
> <target dir='test-lib'/>
> <alias name='fs0'/>
> <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
> </filesystem>

Deepak, I am trying to understand your requirement and see what you need to
do in libvirt-cim to enable 9pfs support.
What in the above libvirt XML makes it specific to 9pfs?  I am looking for
special 'tags'  or 'properties'.

-Sharad Mishra

>
> The <filesystem> node comes directly under the <domain> node.
>
> My approach for introducing 9pfs support in libvirt-cim is ...
>
> 1) Add a new CIM res type, eg; CIM_RES_TYPE_9PFS, is this ok ?
>
> 2) Add appropriate handlers for the above new resource type
>
> 3) Add new members in struct domain for representing this new device
type.
>
> 4) Add appropriate xml parsing generation tags for the new resource type.
>
> 5) I probably need to add something like
> KVM_9PFSResourceAllocationSettingData -- I am not very clear on this yet.
> Need some help on how to do this ?
>
> Would appreciate inputs.
>
> thanx,
> deepak
>
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