[libvirt] [PATCH v2 5/7] qemu: Check for virtio-input capabilites at validate time

[Andrea Bolognani]

The appropriate time to ensure the required capabilities are
present is validate rather than command line generation: add
a new qemuDomainDeviceDefValidateInput() function and move
all existing checks there.

Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 src/qemu/qemu_command.c | 26 ------------------
 src/qemu/qemu_domain.c  | 59 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 58 insertions(+), 27 deletions(-)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index e5743fad9d..db7c3ad698 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -4057,41 +4057,15 @@ qemuBuildVirtioInputDevStr(const virDomainDef *def,
 
     switch ((virDomainInputType)dev->type) {
     case VIR_DOMAIN_INPUT_TYPE_MOUSE:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_MOUSE) ||
-            (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
-             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW))) {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("virtio-mouse is not supported by this QEMU binary"));
-            goto error;
-        }
         virBufferAsprintf(&buf, "virtio-mouse%s", suffix);
         break;
     case VIR_DOMAIN_INPUT_TYPE_TABLET:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_TABLET) ||
-            (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
-             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW))) {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("virtio-tablet is not supported by this QEMU binary"));
-            goto error;
-        }
         virBufferAsprintf(&buf, "virtio-tablet%s", suffix);
         break;
     case VIR_DOMAIN_INPUT_TYPE_KBD:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_KEYBOARD) ||
-            (dev->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
-             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_KEYBOARD_CCW))) {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("virtio-keyboard is not supported by this QEMU binary"));
-            goto error;
-        }
         virBufferAsprintf(&buf, "virtio-keyboard%s", suffix);
         break;
     case VIR_DOMAIN_INPUT_TYPE_PASSTHROUGH:
-        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_INPUT_HOST)) {
-            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                           _("virtio-input-host is not supported by this QEMU binary"));
-            goto error;
-        }
         virBufferAsprintf(&buf, "virtio-input-host%s", suffix);
         break;
     case VIR_DOMAIN_INPUT_TYPE_LAST:
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index f161cf6c84..05e90c3615 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -5727,6 +5727,60 @@ qemuDomainDeviceDefValidateGraphics(const virDomainGraphicsDef *graphics,
 }
 
 
+static int
+qemuDomainDeviceDefValidateInput(const virDomainInputDef *input,
+                                 const virDomainDef *def ATTRIBUTE_UNUSED,
+                                 virQEMUCapsPtr qemuCaps)
+{
+    if (input->bus != VIR_DOMAIN_INPUT_BUS_VIRTIO)
+        return 0;
+
+    switch ((virDomainInputType)input->type) {
+    case VIR_DOMAIN_INPUT_TYPE_MOUSE:
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_MOUSE) ||
+            (input->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
+             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_MOUSE_CCW))) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("virtio-mouse is not supported by this QEMU binary"));
+            return -1;
+        }
+        break;
+    case VIR_DOMAIN_INPUT_TYPE_TABLET:
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_TABLET) ||
+            (input->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
+             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_TABLET_CCW))) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("virtio-tablet is not supported by this QEMU binary"));
+            return -1;
+        }
+        break;
+    case VIR_DOMAIN_INPUT_TYPE_KBD:
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_KEYBOARD) ||
+            (input->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW &&
+             !virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_KEYBOARD_CCW))) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("virtio-keyboard is not supported by this QEMU binary"));
+            return -1;
+        }
+        break;
+    case VIR_DOMAIN_INPUT_TYPE_PASSTHROUGH:
+        if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_VIRTIO_INPUT_HOST)) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                           _("virtio-input-host is not supported by this QEMU binary"));
+            return -1;
+        }
+        break;
+    case VIR_DOMAIN_INPUT_TYPE_LAST:
+    default:
+        virReportEnumRangeError(virDomainInputType,
+                                input->type);
+        return -1;
+    }
+
+    return 0;
+}
+
+
 static int
 qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev,
                             const virDomainDef *def,
@@ -5796,9 +5850,12 @@ qemuDomainDeviceDefValidate(const virDomainDeviceDef *dev,
                                                   qemuCaps);
         break;
 
+    case VIR_DOMAIN_DEVICE_INPUT:
+        ret = qemuDomainDeviceDefValidateInput(dev->data.input, def, qemuCaps);
+        break;
+
     case VIR_DOMAIN_DEVICE_LEASE:
     case VIR_DOMAIN_DEVICE_FS:
-    case VIR_DOMAIN_DEVICE_INPUT:
     case VIR_DOMAIN_DEVICE_SOUND:
     case VIR_DOMAIN_DEVICE_HUB:
     case VIR_DOMAIN_DEVICE_MEMBALLOON:
-- 
2.17.1