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[libvirt] [PATCH 2/3] qemu: Documentation for Disk Geometry Override



From: J.B. Joret <jb linux vnet ibm com>

Updates to domain schema definition and the domain XML documentation
for the disk geometry specification.

Signed-off-by: J.B. Joret <jb linux vnet ibm com>
Signed-off-by: Viktor Mihajlovski <mihajlov linux vnet ibm com>
---
 docs/formatdomain.html.in     |   25 +++++++++++++++++++++++++
 docs/schemas/domaincommon.rng |   28 ++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+), 0 deletions(-)

diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index b6e0d5d..7f42753 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1222,6 +1222,12 @@
       &lt;target dev='sda' bus='scsi'/&gt;
       &lt;address type='drive' controller='0' bus='0' target='3' unit='0'/&gt;
     &lt;/disk&gt;
+    &lt;disk type='block' device='disk'&gt;
+      &lt;driver name='qemu' type='raw'/&gt;
+      &lt;source dev='/dev/sda'/&gt;
+      &lt;geometry cyls='16383' heads='16' secs='63' trans='lba'/&gt;
+      &lt;target dev='hda' bus='ide'/&gt;
+    &lt;/disk&gt;
   &lt;/devices&gt;
   ...</pre>
 
@@ -1569,6 +1575,25 @@
         associated with the Ceph secret
         object.  <span class="since">libvirt 0.9.7</span>
       </dd>
+      <dt><code>geometry</code></dt>
+      <dd>The optional <code>geometry</code> element provides the
+        ability to override geometry settings. This mostly useful for
+        S390 DASD-disks or older DOS-disks
+        <dl>
+          <dt><code>cyls</code></dt>
+          <dd>The <code>cyls</code> element is the
+            number of cylinders. </dd>
+          <dt><code>heads</code></dt>
+          <dd>The <code>heads</code> element is the
+            number of heads. </dd>
+          <dt><code>secs</code></dt>
+          <dd>The <code>secs</code> element is the
+            number of sectors per track. </dd>
+          <dt><code>trans</code></dt>
+          <dd>The optional <code>trans</code> element is the
+            BIOS-Translation-Modus (none, lba or auto)</dd>
+        </dl>
+      </dd>
     </dl>
 
     <h4><a name="elementsFilesystems">Filesystems</a></h4>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index b7562ad..b6970d9 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -945,6 +945,9 @@
                 </optional>
               </element>
             </optional>
+            <optional>
+              <ref name="geometry"/>
+            </optional>
             <ref name="diskspec"/>
           </interleave>
         </group>
@@ -963,6 +966,9 @@
                 </optional>
               </element>
             </optional>
+            <optional>
+              <ref name="geometry"/>
+            </optional>
             <ref name="diskspec"/>
           </interleave>
         </group>
@@ -1053,6 +1059,28 @@
       </optional>
     </element>
   </define>
+  <define name="geometry">
+    <element name="geometry">
+      <attribute name="cyls">
+        <data type="integer"/>
+      </attribute>
+      <attribute name="heads">
+        <data type="integer"/>
+      </attribute>
+      <attribute name="secs">
+        <data type="integer"/>
+      </attribute>
+      <optional>
+        <attribute name="trans">
+          <choice>
+            <value>auto</value>
+            <value>none</value>
+            <value>lba</value>
+          </choice>
+        </attribute>
+      </optional>
+    </element>
+  </define>
   <!--
       Disk may use a special driver for access.
     -->
-- 
1.7.0.4


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