[libvirt] [PATCH 13/13] qemu: allow bus != 0 for scsi-disk when -device is used

John Ferlan jferlan at redhat.com
Sat May 9 01:50:04 UTC 2015

On 05/05/2015 02:03 PM, Laine Stump wrote:
> All the way back at the end of 2009, commit d78554d8 added a check
> that prevented scsi disks from having a bus != 0 due to problems that
> caused (noted in the comments). At that time, -device wasn't supported
> by qemu, so the -drive parameter had to identify each disk by bus
> type (the "if" option), bus#, and unit#.
> Since that time qemu has added the ability to provide such details
> about a disk in a -device parameter, which will contain an id, and
> that id can be referenced in -drive rather than giving
> type/bus/unit. Since no bus= option is present in the -drive string in
> this case, the problem with a non-0 bus is presumably no longer
> present, so this patch makes the restriction active only when -device
> isn't used.
> qemuxml2argv-disk-scsi-lun-passthrough has been modified to set non-0
> buses to assure that the restriction is no longer valid.
> ---
>  src/qemu/qemu_command.c                                     | 13 +++++++++----
>  .../qemuxml2argv-disk-scsi-lun-passthrough.args             | 12 ++++++------
>  .../qemuxml2argv-disk-scsi-lun-passthrough.xml              |  4 ++--
>  3 files changed, 17 insertions(+), 12 deletions(-)

Seems reasonable to me... ACK


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