[libvirt] [PATCH 3/3] qemu: make persistent update of graphics device supported

[Wang Rui]

We can change vnc password by using virDomainUpdateDeviceFlags API with
live flag. But it can't be changed with config flag. Error is reported as
below.

error: Operation not supported: persistent update of device 'graphics' is not supported

This patch supports the vnc/spice auth arguments changed with config flag.

Signed-off-by: Wang Rui <moon.wangrui at huawei.com>
---
 src/conf/domain_conf.c |  3 ++-
 src/qemu/qemu_driver.c | 38 +++++++++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 5f4b9f6..5879f54 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -20847,7 +20847,8 @@ virDomainDeviceDefCopy(virDomainDeviceDefPtr src,
         rc = virDomainControllerDefFormat(&buf, src->data.controller, flags);
         break;
     case VIR_DOMAIN_DEVICE_GRAPHICS:
-        rc = virDomainGraphicsDefFormat(&buf, src->data.graphics, flags);
+        rc = virDomainGraphicsDefFormat(&buf, src->data.graphics,
+                                        flags | VIR_DOMAIN_XML_SECURE);
         break;
     case VIR_DOMAIN_DEVICE_HUB:
         rc = virDomainHubDefFormat(&buf, src->data.hub, flags);
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a84fd47..3096ae4 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -7397,11 +7397,48 @@ qemuDomainUpdateDeviceConfig(virQEMUCapsPtr qemuCaps,
                              virDomainDefPtr vmdef,
                              virDomainDeviceDefPtr dev)
 {
+    virDomainGraphicsDefPtr graphics, newGraphics;
     virDomainDiskDefPtr orig, disk;
     virDomainNetDefPtr net;
     int pos;
 
     switch ((virDomainDeviceType) dev->type) {
+    case VIR_DOMAIN_DEVICE_GRAPHICS:
+        newGraphics = dev->data.graphics;
+        graphics = qemuDomainFindGraphics(vmdef, newGraphics);
+        if (!graphics) {
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("cannot find existing graphics type '%s' device to modify"),
+                           virDomainGraphicsTypeToString(newGraphics->type));
+            return -1;
+        }
+        switch (graphics->type) {
+            case VIR_DOMAIN_GRAPHICS_TYPE_VNC:
+                VIR_FREE(graphics->data.vnc.auth.passwd);
+                graphics->data.vnc.auth.passwd = newGraphics->data.vnc.auth.passwd;
+                newGraphics->data.vnc.auth.passwd = NULL;
+                graphics->data.vnc.auth.validTo = newGraphics->data.vnc.auth.validTo;
+                graphics->data.vnc.auth.expires = newGraphics->data.vnc.auth.expires;
+                graphics->data.vnc.auth.connected = newGraphics->data.vnc.auth.connected;
+                break;
+
+            case VIR_DOMAIN_GRAPHICS_TYPE_SPICE:
+                VIR_FREE(graphics->data.spice.auth.passwd);
+                graphics->data.spice.auth.passwd = newGraphics->data.spice.auth.passwd;
+                newGraphics->data.spice.auth.passwd = NULL;
+                graphics->data.spice.auth.validTo = newGraphics->data.spice.auth.validTo;
+                graphics->data.spice.auth.expires = newGraphics->data.spice.auth.expires;
+                graphics->data.spice.auth.connected = newGraphics->data.spice.auth.connected;
+                break;
+
+            default:
+                virReportError(VIR_ERR_INTERNAL_ERROR,
+                               _("unable to change config on '%s' graphics type"),
+                               virDomainGraphicsTypeToString(newGraphics->type));
+                return -1;
+        }
+        break;
+
     case VIR_DOMAIN_DEVICE_DISK:
         disk = dev->data.disk;
         pos = virDomainDiskIndexByName(vmdef, disk->dst, false);
@@ -7455,7 +7492,6 @@ qemuDomainUpdateDeviceConfig(virQEMUCapsPtr qemuCaps,
     case VIR_DOMAIN_DEVICE_SOUND:
     case VIR_DOMAIN_DEVICE_VIDEO:
     case VIR_DOMAIN_DEVICE_WATCHDOG:
-    case VIR_DOMAIN_DEVICE_GRAPHICS:
     case VIR_DOMAIN_DEVICE_HUB:
     case VIR_DOMAIN_DEVICE_SMARTCARD:
     case VIR_DOMAIN_DEVICE_MEMBALLOON:
-- 
1.7.12.4