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qemu: hotplug: Introduce hot unplug for mediated devices

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Mediated devices support hot-{plug,unplug} since their introduction in
kernel 4.10, however libvirt has still been missing support for this.

Signed-off-by: Erik Skultety <eskultet@redhat.com>
This commit is contained in:
Erik Skultety 2018-03-26 10:06:07 +02:00
parent 70d193de19
commit 5905291402
1 changed files with 47 additions and 0 deletions
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47
src/qemu/qemu_hotplug.c
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@ -4030,6 +4030,17 @@ qemuDomainRemoveSCSIVHostDevice(virQEMUDriverPtr driver,
qemuHostdevReAttachSCSIVHostDevices(driver, vm->def->name, &hostdev, 1);
}
static void
qemuDomainRemoveMediatedDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainHostdevDefPtr hostdev)
{
qemuHostdevReAttachMediatedDevices(driver, vm->def->name, &hostdev, 1);
qemuDomainReleaseDeviceAddress(vm, hostdev->info, NULL);
}
static int
qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
@ -4132,6 +4143,7 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
qemuDomainRemoveSCSIVHostDevice(driver, vm, hostdev);
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
qemuDomainRemoveMediatedDevice(driver, vm, hostdev);
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
break;
@ -5062,6 +5074,32 @@ qemuDomainDetachSCSIVHostDevice(virQEMUDriverPtr driver,
return ret;
}
static int
qemuDomainDetachMediatedDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainHostdevDefPtr detach)
{
int ret = -1;
qemuDomainObjPrivatePtr priv = vm->privateData;
if (!detach->info->alias) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("device cannot be detached without a device alias"));
return -1;
}
qemuDomainMarkDeviceForRemoval(vm, detach->info);
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorDelDevice(priv->mon, detach->info->alias);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
return ret;
}
static int
qemuDomainDetachThisHostDevice(virQEMUDriverPtr driver,
virDomainObjPtr vm,
@ -5085,6 +5123,9 @@ qemuDomainDetachThisHostDevice(virQEMUDriverPtr driver,
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
ret = qemuDomainDetachSCSIVHostDevice(driver, vm, detach);
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
ret = qemuDomainDetachMediatedDevice(driver, vm, detach);
break;
default:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("hot unplug is not supported for hostdev subsys type '%s'"),
@ -5114,6 +5155,7 @@ int qemuDomainDetachHostDevice(virQEMUDriverPtr driver,
virDomainHostdevSubsysUSBPtr usbsrc = &subsys->u.usb;
virDomainHostdevSubsysPCIPtr pcisrc = &subsys->u.pci;
virDomainHostdevSubsysSCSIPtr scsisrc = &subsys->u.scsi;
virDomainHostdevSubsysMediatedDevPtr mdevsrc = &subsys->u.mdev;
virDomainHostdevDefPtr detach = NULL;
int idx;
@ -5162,6 +5204,11 @@ int qemuDomainDetachHostDevice(virQEMUDriverPtr driver,
}
break;
}
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
virReportError(VIR_ERR_DEVICE_MISSING,
_("mediated device '%s' not found"),
mdevsrc->uuidstr);
break;
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
break;
default: