[libvirt] [PATCH v2 3/5] qemu: Add vhost-scsi string for -device parameter

John Ferlan jferlan at redhat.com
Tue Sep 13 20:55:15 UTC 2016


[...]

>>> diff --git a/src/util/virscsi.c b/src/util/virscsi.c
>>> index 4843367..290b692 100644
>>> --- a/src/util/virscsi.c
>>> +++ b/src/util/virscsi.c
>>> @@ -105,6 +105,32 @@ virSCSIDeviceGetAdapterId(const char *adapter,
>>>       return -1;
>>>   }
>>>   +int
>>> +virSCSIOpenVhost(int *vhostfd,
>>> +                 size_t *vhostfdSize)
>> Well this is dangerous... I can pass "any" value value here and really
>> cause some damage.  Why the need for a loop?
> 
> Well, I guess I only half-cleaned it up.  I'm not aware of any mechanism
> to pass multiple fd's for vhost-scsi-pci or vhost-scsi-ccw into QEMU
> (unlike the virtio-scsi-{ccw|pci} paths), so I started ripping the loops
> out.  Looking at it now, I guess I didn't rip out nearly as much as I
> thought I did.  So, more to remove I guess. Unless leaving it there for
> an "if the future ever arrives" case is a problem.
> 

Doh - search on 'vhost-net' to find qemuInterfaceOpenVhostNet...  That's
a multiple open model and depending on virtio.queues which is something
I believe I was asking about for an attribute num_queues...

John




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