[libvirt] [PATCH 3/4] qemu: hotplug: Introduce hot unplug for mediated devices
Mediated devices support hot-{plug,unplug} since their introduction in
kernel 4.10, however this feature has been missing in libvirt since
commit ec783d7c introduced a hostdev type for mdevs.
Signed-off-by: Erik Skultety <eskultet(a)redhat.com>
---
src/qemu/qemu_hotplug.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 4abc7393b..ff77b47bc 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -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;
@@ -5059,6 +5071,32 @@ 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,
@@ -5082,6 +5120,9 @@ 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'"),
@@ -5111,6 +5152,7 @@ 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;
@@ -5159,6 +5201,11 @@ 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:
--
2.14.3