[libvirt] [PATCH v3 03/12] qemu: support host usb device unplug
Handle host usb device unplug in DEVICE_DELETED handle execution
path.
Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413(a)gmail.com>
---
src/qemu/qemu_hotplug.c | 38 +++++++++++++++++++++++++++++++-------
1 file changed, 31 insertions(+), 7 deletions(-)
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 5b65963f86..121e4b2821 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -4465,7 +4465,8 @@ qemuDomainRemoveUSBHostDevice(virQEMUDriverPtr driver,
virDomainHostdevDefPtr hostdev)
{
qemuHostdevReAttachUSBDevices(driver, vm->def->name, &hostdev, 1);
- qemuDomainReleaseDeviceAddress(vm, hostdev->info);
+ if (hostdev->deleteAction != VIR_DOMAIN_HOSTDEV_DELETE_ACTION_UNPLUG)
+ qemuDomainReleaseDeviceAddress(vm, hostdev->info);
}
static void
@@ -4507,6 +4508,7 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
char *drivealias = NULL;
char *objAlias = NULL;
bool is_vfio = false;
+ bool unplug = hostdev->deleteAction == VIR_DOMAIN_HOSTDEV_DELETE_ACTION_UNPLUG;
VIR_DEBUG("Removing host device %s from domain %p %s",
hostdev->info->alias, vm, vm->def->name);
@@ -4554,16 +4556,24 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
}
}
- for (i = 0; i < vm->def->nhostdevs; i++) {
- if (vm->def->hostdevs[i] == hostdev) {
- virDomainHostdevRemove(vm->def, i);
- break;
+ if (!unplug) {
+ for (i = 0; i < vm->def->nhostdevs; i++) {
+ if (vm->def->hostdevs[i] == hostdev) {
+ virDomainHostdevRemove(vm->def, i);
+ break;
+ }
}
}
virDomainAuditHostdev(vm, hostdev, "detach", true);
- if (!is_vfio &&
+ /*
+ * In case of unplug the attempt to restore label will fail. But we don't
+ * need to restore the label! In case of separate mount namespace for the
+ * domain we remove device file later in this function. In case of global
+ * mount namespace the device file is deleted or being deleted by systemd.
+ */
+ if (!is_vfio && !unplug &&
qemuSecurityRestoreHostdevLabel(driver, vm, hostdev) < 0)
VIR_WARN("Failed to restore host device labelling");
@@ -4597,7 +4607,13 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
break;
}
- virDomainHostdevDefFree(hostdev);
+ if (unplug) {
+ virDomainHostdevSubsysUSBPtr usbsrc = &hostdev->source.subsys.u.usb;
+ usbsrc->bus = 0;
+ usbsrc->device = 0;
+ } else {
+ virDomainHostdevDefFree(hostdev);
+ }
if (net) {
if (net->type == VIR_DOMAIN_NET_TYPE_NETWORK) {
@@ -4612,6 +4628,8 @@ qemuDomainRemoveHostDevice(virQEMUDriverPtr driver,
virDomainNetDefFree(net);
}
+ hostdev->deleteAction = VIR_DOMAIN_HOSTDEV_DELETE_ACTION_NONE;
+
ret = 0;
cleanup:
@@ -5084,6 +5102,7 @@ qemuDomainRemoveDevice(virQEMUDriverPtr driver,
virDomainDeviceInfoPtr info;
virObjectEventPtr event;
VIR_AUTOFREE(char *) alias = NULL;
+ bool unplug;
/*
* save the alias to use when sending a DEVICE_REMOVED event after
@@ -5124,8 +5143,13 @@ qemuDomainRemoveDevice(virQEMUDriverPtr driver,
return -1;
break;
case VIR_DOMAIN_DEVICE_HOSTDEV:
+ unplug = dev->data.hostdev->deleteAction ==
VIR_DOMAIN_HOSTDEV_DELETE_ACTION_UNPLUG;
+
if (qemuDomainRemoveHostDevice(driver, vm, dev->data.hostdev) < 0)
return -1;
+
+ if (unplug)
+ return 0;
break;
case VIR_DOMAIN_DEVICE_RNG:
if (qemuDomainRemoveRNGDevice(driver, vm, dev->data.rng) < 0)
--
2.23.0