conf: storage_source: Introduce virStorageSourceIsFD

The helper will be used in various places that need to check that a disk
source struct is using FD passing.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>

src/conf/storage_source_conf.c

@@ -1057,6 +1057,13 @@ virStorageSourceIsLocalStorage(const virStorageSource *src)
 }
 
 
+bool
+virStorageSourceIsFD(const virStorageSource *src)
+{
+    return src->fdgroup;
+}
+
+
 /**
  * virStorageSourceIsEmpty:
  *

src/conf/storage_source_conf.h

@@ -494,6 +494,9 @@ virStorageSourceGetActualType(const virStorageSource *def);
 bool
 virStorageSourceIsLocalStorage(const virStorageSource *src);
 
+bool
+virStorageSourceIsFD(const virStorageSource *src);
+
 bool
 virStorageSourceIsEmpty(virStorageSource *src);
 

src/libvirt_private.syms

@@ -1129,6 +1129,7 @@ virStorageSourceInitiatorParseXML;
 virStorageSourceIsBacking;
 virStorageSourceIsBlockLocal;
 virStorageSourceIsEmpty;
+virStorageSourceIsFD;
 virStorageSourceIsLocalStorage;
 virStorageSourceIsRelative;
 virStorageSourceIsSameLocation;