[libvirt] [PATCH 4/7] virsh: nodedev: ability to filter CCW capabilities

[John Ferlan]

On 05/26/2017 03:00 AM, Bjoern Walk wrote:
> John Ferlan <jferlan at redhat.com> [2017-05-25, 03:21PM -0400]:
>>
>>
>> On 05/22/2017 02:38 AM, Bjoern Walk wrote:
>>> Now that the node_device driver is aware of CCW devices, let's hook up
>>> virsh so that we can filter them properly.
>>>
>>> Reviewed-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
>>> Reviewed-by: Marc Hartmayer <mhartmay at linux.vnet.ibm.com>
>>> Signed-off-by: Bjoern Walk <bwalk at linux.vnet.ibm.com>
>>> ---
>>>  docs/formatnode.html.in           | 12 ++++++++++++
>>>  include/libvirt/libvirt-nodedev.h |  1 +
>>>  src/conf/node_device_conf.h       |  3 ++-
>>>  src/conf/virnodedeviceobj.c       |  3 ++-
>>>  src/libvirt-nodedev.c             |  1 +
>>>  tools/virsh-nodedev.c             |  3 ++-
>>>  tools/virsh.pod                   |  2 +-
>>>  7 files changed, 21 insertions(+), 4 deletions(-)
>>>
>>
>>
>> ...
>>
>>> diff --git a/src/conf/virnodedeviceobj.c b/src/conf/virnodedeviceobj.c
>>> index 02ac54437..d460f26ec 100644
>>> --- a/src/conf/virnodedeviceobj.c
>>> +++ b/src/conf/virnodedeviceobj.c
>>> @@ -568,7 +568,8 @@ virNodeDeviceMatch(virNodeDeviceObjPtr devobj,
>>>                MATCH(SCSI_GENERIC)  ||
>>>                MATCH(DRM)           ||
>>>                MATCH(MDEV_TYPES)    ||
>>> -              MATCH(MDEV)))
>>> +              MATCH(MDEV)          ||
>>> +              MATCH(CCW_DEV)))
>>>              return false;
>>>      }
>>>
>>
>> But you didn't modify virNodeDeviceCapMatch in order perform the match
>> that the MATCH does.
>>
> 
> Damn, there's a lot that you can miss with these capabilities.
> 

I sent a patch which should cover this for the future:

https://www.redhat.com/archives/libvir-list/2017-May/msg01003.html


>> Also, another well hidden gem that either Erik Skultety or myself will
>> fix "eventually" is virNodeDeviceObjHasCap.  See commit id 'e8fcac8ec'
>> for some context.  Essentially, the virNodeDeviceMatch only matches for
>> the virNodeDeviceObjListExport API.
>>
> 
> And even more. Thanks for the pointers.
> 

In rethinking this - it doesn't necessarily seem as though this device
would have the same issues as NPIV (a SCSI_HOST device parent that has
capabilities of either "fc_host" or "vports" to describe a capable
child) or MDEV (a PCI device that a parent mediated device with "mdev"
capabilities to describe the children).

As long as you're comfortable that the match can be done - I'm good. The
mdev changes were recently reviewed by me so it was fresh in my mind.

John


>> If you want to send something to squash in or just a v2 of this patch -
>> I can handle either.
>>
>> Reviewed-by: John Ferlan <jferlan at redhat.com>
> 
> Thanks.
> 
>>
>> John
>>
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