[libvirt] [PATCH v2 07/15] nodedev: Introduce virNodeDeviceGetParentName

[John Ferlan]

Create a function which takes a node device "name" entry to lookup
and returns a string containing the parent name for the node device.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---

 Adjustment from v1... Instead of moving function to virvhba.c, create
 a new node_device_conf API which does something similar to what the
 changed code from patch 7 and 8 (e.g. virVHBAGetParent) would have done.

 src/conf/node_device_conf.c | 30 ++++++++++++++++++++++++++++++
 src/conf/node_device_conf.h |  3 +++
 src/libvirt_private.syms    |  1 +
 3 files changed, 34 insertions(+)

diff --git a/src/conf/node_device_conf.c b/src/conf/node_device_conf.c
index b3063d9..34ca0ef 100644
--- a/src/conf/node_device_conf.c
+++ b/src/conf/node_device_conf.c
@@ -2285,3 +2285,33 @@ virNodeDeviceObjListExport(virConnectPtr conn,
     VIR_FREE(tmp_devices);
     return ret;
 }
+
+
+/* virNodeDeviceGetParentName
+ * @conn: Connection pointer
+ * @nodedev_name: Node device to lookup
+ *
+ * Lookup the node device by name and return the parent name
+ *
+ * Returns parent name on success, caller is responsible for freeing;
+ * otherwise, returns NULL on failure
+ */
+char *
+virNodeDeviceGetParentName(virConnectPtr conn,
+                           const char *nodedev_name)
+{
+    virNodeDevicePtr device = NULL;
+    char *parent;
+
+    if (!(device = virNodeDeviceLookupByName(conn, nodedev_name))) {
+        virReportError(VIR_ERR_XML_ERROR,
+                       _("Cannot find '%s' in node device database"),
+                       nodedev_name);
+        return NULL;
+    }
+
+    ignore_value(VIR_STRDUP(parent, virNodeDeviceGetParent(device)));
+    virObjectUnref(device);
+
+    return parent;
+}
diff --git a/src/conf/node_device_conf.h b/src/conf/node_device_conf.h
index 40e930a..6c43546 100644
--- a/src/conf/node_device_conf.h
+++ b/src/conf/node_device_conf.h
@@ -352,4 +352,7 @@ int virNodeDeviceObjListExport(virConnectPtr conn,
                                virNodeDeviceObjListFilter filter,
                                unsigned int flags);
 
+char *virNodeDeviceGetParentName(virConnectPtr conn,
+                                 const char *nodedev_name);
+
 #endif /* __VIR_NODE_DEVICE_CONF_H__ */
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d721c12..9ad0b0a 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -706,6 +706,7 @@ virNodeDeviceFindVportParentHost;
 virNodeDeviceGetParentHost;
 virNodeDeviceGetParentHostByFabricWWN;
 virNodeDeviceGetParentHostByWWNs;
+virNodeDeviceGetParentName;
 virNodeDeviceGetWWNs;
 virNodeDeviceHasCap;
 virNodeDeviceObjListExport;
-- 
2.9.3