[PATCHv5 11/13] Add compatibility attribute to video

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<video>
  <driver compatibility='modern'/>
  <model type='virtio' heads='1' primary='yes'/>
</video>

https://bugzilla.redhat.com/show_bug.cgi?id=1227354
---
 docs/formatdomain.html.in                               |  8 ++++++++
 docs/schemas/domaincommon.rng                           |  5 +++++
 src/conf/domain_conf.c                                  | 17 +++++++++++++++--
 src/conf/domain_conf.h                                  |  1 +
 tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml |  1 +
 .../qemuxml2xmlout-virtio-revision.xml                  |  1 +
 6 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 41a9325..d640e8d 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -5641,6 +5641,14 @@ qemu-kvm -net nic,model=? /dev/null
         The optional <code>address</code> sub-element can be used to
         tie the video device to a particular PCI slot.
       </dd>
+
+      <dt><code>driver</code></dt>
+      <dd>
+        The <code>compatibility</code> attribute can be used to specify the
+        compatibility of virtio devices. Allowed values are <code>legacy</code>,
+        <code>transitional</code> and <code>modern</code>.
+        <span class="since">Since 2.2.0</span>.
+      </dd>
     </dl>
 
     <h4><a name="elementsConsole">Consoles, serial, parallel &amp; channel devices</a></h4>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index ed00ace..f250cbc 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -3080,6 +3080,11 @@
   <define name="video">
     <element name="video">
       <optional>
+        <element name="driver">
+          <ref name="compatibility"/>
+        </element>
+      </optional>
+      <optional>
         <element name="model">
           <choice>
             <attribute name="type">
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 166f5fb..03c856c 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -12605,11 +12605,13 @@ virDomainVideoAccelDefParseXML(xmlNodePtr node)
 
 static virDomainVideoDefPtr
 virDomainVideoDefParseXML(xmlNodePtr node,
+                          xmlXPathContextPtr ctxt,
                           const virDomainDef *dom,
                           unsigned int flags)
 {
     virDomainVideoDefPtr def;
     xmlNodePtr cur;
+    xmlNodePtr saved = ctxt->node;
     char *type = NULL;
     char *heads = NULL;
     char *vram = NULL;
@@ -12618,6 +12620,8 @@ virDomainVideoDefParseXML(xmlNodePtr node,
     char *vgamem = NULL;
     char *primary = NULL;
 
+    ctxt->node = node;
+
     if (VIR_ALLOC(def) < 0)
         return NULL;
 
@@ -12719,7 +12723,12 @@ virDomainVideoDefParseXML(xmlNodePtr node,
     if (virDomainDeviceInfoParseXML(node, NULL, &def->info, flags) < 0)
         goto error;
 
+    if (virDomainDriverCompatibilityParseXML(ctxt, &def->compatibility) < 0)
+        goto error;
+
  cleanup:
+    ctxt->node = saved;
+
     VIR_FREE(type);
     VIR_FREE(ram);
     VIR_FREE(vram);
@@ -13414,7 +13423,7 @@ virDomainDeviceDefParse(const char *xmlStr,
             goto error;
         break;
     case VIR_DOMAIN_DEVICE_VIDEO:
-        if (!(dev->data.video = virDomainVideoDefParseXML(node, def, flags)))
+        if (!(dev->data.video = virDomainVideoDefParseXML(node, ctxt, def, flags)))
             goto error;
         break;
     case VIR_DOMAIN_DEVICE_HOSTDEV:
@@ -17084,7 +17093,7 @@ virDomainDefParseXML(xmlDocPtr xml,
         virDomainVideoDefPtr video;
         ssize_t insertAt = -1;
 
-        if (!(video = virDomainVideoDefParseXML(nodes[i], def, flags)))
+        if (!(video = virDomainVideoDefParseXML(nodes[i], ctxt, def, flags)))
             goto error;
 
         if (video->primary) {
@@ -21896,6 +21905,10 @@ virDomainVideoDefFormat(virBufferPtr buf,
 
     virBufferAddLit(buf, "<video>\n");
     virBufferAdjustIndent(buf, 2);
+    if (def->compatibility) {
+        virBufferAsprintf(buf, "<driver compatibility='%s'/>\n",
+                          virDomainDriverCompatibilityTypeToString(def->compatibility));
+    }
     virBufferAsprintf(buf, "<model type='%s'",
                       model);
     if (def->ram)
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 342218e..ecccc0a 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -1322,6 +1322,7 @@ struct _virDomainVideoDef {
     bool primary;
     virDomainVideoAccelDefPtr accel;
     virDomainDeviceInfo info;
+    virDomainDriverCompatibility compatibility;
 };
 
 /* graphics console modes */
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml b/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
index 5b9726a..fecf9e5 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
@@ -86,6 +86,7 @@
     <input type='mouse' bus='ps2'/>
     <input type='keyboard' bus='ps2'/>
     <video>
+      <driver compatibility='modern'/>
       <model type='virtio' heads='1' primary='yes'>
         <acceleration accel3d='yes'/>
       </model>
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
index ab69bb7..f1c728e 100644
--- a/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
@@ -86,6 +86,7 @@
     <input type='mouse' bus='ps2'/>
     <input type='keyboard' bus='ps2'/>
     <video>
+      <driver compatibility='modern'/>
       <model type='virtio' heads='1' primary='yes'>
         <acceleration accel3d='yes'/>
       </model>
-- 
2.7.3

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