[PATCHv5 07/13] Add compatibility attribute to controllers

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<controller type='scsi' index='0' model='virtio-scsi'>
    <driver compatibility='modern'/>
</controller>

https://bugzilla.redhat.com/show_bug.cgi?id=1227354
---
 docs/formatdomain.html.in                                   |  9 ++++++++-
 docs/schemas/domaincommon.rng                               |  3 +++
 src/conf/domain_conf.c                                      |  7 +++++++
 src/conf/domain_conf.h                                      |  1 +
 tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml     | 10 ++++++++++
 tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml | 10 ++++++++++
 6 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 3f06613..e208767 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -3126,7 +3126,7 @@
       &lt;address type='pci' domain='0x0000' bus='0x00' slot='0x0a' function='0x0'/&gt;
     &lt;/controller&gt;
     &lt;controller type='scsi' index='0' model='virtio-scsi'&gt;
-      &lt;driver iothread='4'&gt;
+      &lt;driver iothread='4' compatibility='modern'&gt;
       &lt;address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/&gt;
     &lt;/controller&gt;
     ...
@@ -3238,6 +3238,13 @@
         <code>iothread</code> value. The <code>iothread</code> value
         must be within the range 1 to the domain iothreads value.
       </dd>
+      <dt><code>compatibility</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>
     <p>
       USB companion controllers have an optional
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 2cf3c1b..9f912d2 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -1944,6 +1944,9 @@
             <optional>
               <ref name="driverIOThread"/>
             </optional>
+            <optional>
+              <ref name="compatibility"/>
+            </optional>
           </element>
         </optional>
       </interleave>
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index b7a5e26..1916bb8 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -8283,6 +8283,9 @@ virDomainControllerDefParseXML(xmlNodePtr node,
         cur = cur->next;
     }
 
+    if (virDomainDriverCompatibilityParseXML(ctxt, &def->compatibility) < 0)
+        goto error;
+
     /* node is parsed differently from target attributes because
      * someone thought it should be a subelement instead...
      */
@@ -20244,6 +20247,10 @@ virDomainControllerDefFormat(virBufferPtr buf,
         if (def->iothread)
             virBufferAsprintf(&driverBuf, " iothread='%u'", def->iothread);
 
+        if (def->compatibility)
+            virBufferAsprintf(&driverBuf, " compatibility='%s'",
+                              virDomainDriverCompatibilityTypeToString(def->compatibility));
+
         if (virBufferUse(&driverBuf)) {
             virBufferAddLit(buf, "<driver");
             virBufferAddBuffer(buf, &driverBuf);
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 5ceb22a..1641ad9 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -764,6 +764,7 @@ struct _virDomainControllerDef {
         virDomainUSBControllerOpts usbopts;
     } opts;
     virDomainDeviceInfo info;
+    virDomainDriverCompatibility compatibility;
 };
 
 
diff --git a/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml b/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
index c37a6c8..176a270 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
+++ b/tests/qemuxml2argvdata/qemuxml2argv-virtio-revision.xml
@@ -26,12 +26,22 @@
       <target dev='vdb' bus='virtio'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
     </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source file='/var/lib/libvirt/images/img3'/>
+      <target dev='sda' bus='scsi'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
     <controller type='usb' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
     </controller>
     <controller type='ide' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
     </controller>
+    <controller type='scsi' index='0' model='virtio-scsi'>
+      <driver compatibility='transitional'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </controller>
     <controller type='pci' index='0' model='pci-root'/>
     <controller type='virtio-serial' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
diff --git a/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml b/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
index c37a6c8..176a270 100644
--- a/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
+++ b/tests/qemuxml2xmloutdata/qemuxml2xmlout-virtio-revision.xml
@@ -26,12 +26,22 @@
       <target dev='vdb' bus='virtio'/>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/>
     </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source file='/var/lib/libvirt/images/img3'/>
+      <target dev='sda' bus='scsi'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
     <controller type='usb' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
     </controller>
     <controller type='ide' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
     </controller>
+    <controller type='scsi' index='0' model='virtio-scsi'>
+      <driver compatibility='transitional'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </controller>
     <controller type='pci' index='0' model='pci-root'/>
     <controller type='virtio-serial' index='0'>
       <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
-- 
2.7.3

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