[libvirt] [PATCH 3/3] qemu: Auto-generate controller for hotplugged hostdev

If a SCSI hostdev is included in an initial domain XML, without a corresponding controller statement, one is created silently when the guest is booted. When hotplugging a SCSI hostdev, a presumption is that the controller is already present in the domain either from the original XML, or via an earlier hotplug. [root@xxxxxxxx ~]# cat disk.xml <hostdev mode='subsystem' type='scsi'> <source> <adapter name='scsi_host0'/> <address bus='0' target='3' unit='1088438288'/> </source> </hostdev> [root@xxxxxxxx ~]# virsh attach-device guest01 disk.xml error: Failed to attach device from disk.xml error: internal error: unable to execute QEMU command 'device_add': Bus 'scsi0.0' not found Since the infrastructure is in place, we can also create a controller silently for use by the hotplugged hostdev device. Signed-off-by: Eric Farman <farman(a)linux.vnet.ibm.com&gt; --- src/qemu/qemu_hotplug.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 70a1b3d..3af13b8 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -1485,6 +1485,7 @@ qemuDomainAttachHostScsiDevice(virQEMUDriverPtr driver, { int ret = -1; qemuDomainObjPrivatePtr priv = vm->privateData; + virDomainControllerDefPtr cont = NULL; char *devstr = NULL; char *drvstr = NULL; @@ -1496,6 +1497,10 @@ qemuDomainAttachHostScsiDevice(virQEMUDriverPtr driver, return -1; } + cont = qemuDomainFindOrCreateSCSIDiskController(driver, vm, hostdev->info->addr.drive.controller); + if (!cont) + return -1; + if (qemuPrepareHostdevSCSIDevices(driver, vm->def->name, &hostdev, 1)) { virReportError(VIR_ERR_INTERNAL_ERROR, -- 1.7.9.5