2010/3/17 Matthias Bolte <matthias.bolte@googlemail.com>:
2010/3/15 Daniel P. Berrange <berrange@redhat.com>:
On Fri, Mar 12, 2010 at 09:19:02PM +0100, Matthias Bolte wrote:
diff --git a/tests/xml2vmxdata/xml2vmx-scsi-driver.xml b/tests/xml2vmxdata/xml2vmx-scsi-driver.xml new file mode 100644 index 0000000..797a26e --- /dev/null +++ b/tests/xml2vmxdata/xml2vmx-scsi-driver.xml @@ -0,0 +1,25 @@ +<domain type='vmware'> + <name>scsi-buslogic</name> + <uuid>564d9bef-acd9-b4e0-c8f0-aea8b9103515</uuid> + <memory>4096</memory> + <os> + <type>hvm</type> + </os> + <devices> + <disk type='file' device='disk'> + <driver name='buslogic'/> + <source file='[datastore] directory/harddisk1.vmdk'/> + <target dev='sda' bus='scsi'/> + </disk> + <disk type='file' device='disk'> + <driver name='lsilogic'/> + <source file='[datastore] directory/harddisk2.vmdk'/> + <target dev='sdp' bus='scsi'/> + </disk> + <disk type='file' device='disk'> + <driver name='lsisas1068'/> + <source file='[datastore] directory/harddisk3.vmdk'/> + <target dev='sdae' bus='scsi'/> + </disk> + </devices> +</domain>
Using the '<driver>' element here is somewhat incorrect, since this is in fact used to refer to the backend driver. The 'name' attribute refered to the host backend driver (only really used for xen to switch between kernel & userspace backends), while the 'type' refered to the file format (vmdk, qcow, etc).
In the vmware context lsilogic/buslogic is refering to the guest device type.
What is visible in the guest when you have 3 disks configured in this way with buslogic, lsilogic & lsisas1068 ? Do you get 3 separate PCI devices as the SCSI controllers & then 1 disk attached to each ? If so, then we could model this difference using the recent <controller> element instead.
If there's only one PCI device / SCSI controller & different types of disk attached to that controller, then we'd need to invent a new way within <disk> of doing the model name
Daniel
Yes, it's the SCSI controller device type. <driver name='buslogic'/> currently maps to
scsi0.virtualDev = "buslogic"
and scsi0 is the first SCSI controller.
So I withdraw this patch and rework the controller type handling to use the <controller> element.
There seems to be no documentation about the <controller> element on the libvirt website, or do I miss something?
Matthias
As I already said your argument is valid, but I would like to push this patch to get the problem with ESX4 and lsisas1068 [1] "fixed" for the 0.7.8 release, because the reworked controller handling won't be finished until 0.7.8. [1] https://www.redhat.com/archives/libvirt-users/2010-March/msg00016.html Matthias