qemu: Introduce qemuAliasFromHostdev

Introduce a common API to generate the alias for a host device

src/qemu/qemu_alias.c

@@ -493,6 +493,29 @@ qemuAliasDiskDriveSkipPrefix(const char *dev_name)
 }
 
 
+/* qemuAliasFromHostdev
+ * @hostdev: Pointer to host device
+ *
+ * Generate and return a string containing a drive alias
+ */
+char *
+qemuAliasFromHostdev(const virDomainHostdevDef *hostdev)
+{
+    char *ret;
+
+    if (!hostdev->info->alias) {
+        virReportError(VIR_ERR_INVALID_ARG, "%s",
+                       _("hostdev does not have an alias"));
+        return NULL;
+    }
+
+    ignore_value(virAsprintf(&ret, "%s-%s",
+                 virDomainDeviceAddressTypeToString(hostdev->info->type),
+                 hostdev->info->alias));
+    return ret;
+}
+
+
 /* qemuDomainGetMasterKeyAlias:
  *
  * Generate and return the masterKey alias

src/qemu/qemu_alias.h

@@ -69,6 +69,8 @@ char *qemuAliasFromDisk(const virDomainDiskDef *disk);
 
 const char *qemuAliasDiskDriveSkipPrefix(const char *dev_name);
 
+char *qemuAliasFromHostdev(const virDomainHostdevDef *hostdev);
+
 char *qemuDomainGetMasterKeyAlias(void);
 
 char *qemuDomainGetSecretAESAlias(const char *srcalias,