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

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.