Re: [PATCH REPOST v2 0/3] Add callback mech for qemu and nodedev

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On 22/02/2017 15:11, Daniel P. Berrange wrote:
> On Wed, Feb 22, 2017 at 03:10:00PM +0100, Paolo Bonzini wrote:
>>
>>
>> On 22/02/2017 14:46, Daniel P. Berrange wrote:
>>> On Wed, Feb 22, 2017 at 02:38:32PM +0100, Paolo Bonzini wrote:
>>>>
>>>>
>>>> On 22/02/2017 11:05, Daniel P. Berrange wrote:
>>>>> I'd also suggest just assigning the whole vHBA
>>>>
>>>> What do you mean by "assigning the whole vHBA"?  There is no concept of
>>>> a vHBA as e.g. a PCI virtual function.
>>>
>>> I thought we had a generic SCSI passthrough capability that could
>>> attach to the SCSI vHBA in the host, or am I mis-remembering ?
>>
>> No, the SCSI passthrough capability attaches to a single device.
>>
>> With Fibre Channel, zoning allows you to configure the set of visible
>> disks for each machine (or more accurately for each WWPN and/or WWNN) at
>> the storage fabric level.  So the idea is to just configure the
>> WWPN/WWNN and let libvirt handle the discovery of disks underneath.  The
>> alternative is to do it in both oVirt and Nova though, as mentioned
>> elsewhere in the thread, libvirt could still provide a udev wrapper.
> 
> What do you mean by "provide a udev wrapper" ?

Expose udev events in a way that is friendly to someone who is consuming
the nodedev API.

Thanks,

Paolo

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