Re: [PATCH iproute2-next v3 0/5] Add vdpa device management tool

[Adrian Moreno <amorenoz@redhat.com>]

Sorry I have not followed this work as close as I would have wanted.
Some questions below.

On 2/4/21 4:16 AM, Jason Wang wrote:
> 
> On 2021/2/2 下午6:35, Parav Pandit wrote:
>> Linux vdpa interface allows vdpa device management functionality.
>> This includes adding, removing, querying vdpa devices.
>>
>> vdpa interface also includes showing supported management devices
>> which support such operations.
>>
>> This patchset includes kernel uapi headers and a vdpa tool.
>>
>> examples:
>>
>> $ vdpa mgmtdev show
>> vdpasim:
>>    supported_classes net
>>
>> $ vdpa mgmtdev show -jp
>> {
>>      "show": {
>>          "vdpasim": {
>>              "supported_classes": [ "net" ]
>>          }
>>      }
>> }
>>

How can a user establish the relationship between a mgmtdev and it's parent
device (pci vf, sf, etc)?

>> Create a vdpa device of type networking named as "foo2" from
>> the management device vdpasim_net:
>>
>> $ vdpa dev add mgmtdev vdpasim_net name foo2
>>

I guess this command will accept a 'type' parameter once more supported_classes
are added?

Also, will this tool also handle the vdpa driver binding or will the user handle
that through the vdpa bus' sysfs interface?

>> Show the newly created vdpa device by its name:
>> $ vdpa dev show foo2
>> foo2: type network mgmtdev vdpasim_net vendor_id 0 max_vqs 2 max_vq_size 256
>>
>> $ vdpa dev show foo2 -jp
>> {
>>      "dev": {
>>          "foo2": {
>>              "type": "network",
>>              "mgmtdev": "vdpasim_net",
>>              "vendor_id": 0,
>>              "max_vqs": 2,
>>              "max_vq_size": 256
>>          }
>>      }
>> }
>>
>> Delete the vdpa device after its use:
>> $ vdpa dev del foo2
>>
>> Patch summary:
>> Patch-1 adds kernel headers for vdpa subsystem
>> Patch-2 adds library routines for indent handling
>> Patch-3 adds library routines for generic socket communication
>> PAtch-4 adds library routine for number to string mapping
>> Patch-5 adds vdpa tool
>>
>> Kernel headers are from the vhost kernel tree [1] from branch linux-next.
>>
>> [1] https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git
>>
>> ---
> 
> 
> Adding Adrian to see if this looks good for k8s integration.
> 
> Thanks
> 

Thanks
-- 
Adrián Moreno