[PATCH v5 3/9] virstoragefile: Add virStorageSourceSetBackingStore

[Matthias Gatto <matthias.gatto@xxxxxxxxxxxx>]

As explained for virStorageSourceGetBackingStore, quorum allows
multiple backing store, this make the operation to set bs complex
because we have to check if the backingStore is used as an array
or a pointer, and set it differently in both case.

In order to help the manipulation of backing store, I've added a
function virStorageSourceSetBackingStore.

For now virStorageSourceSetBackingStore don't handle the case where
we have more than one backing store in virStorageSource.

Signed-off-by: Matthias Gatto <matthias.gatto@xxxxxxxxxxxx>
Signed-off-by: John Ferlan <jferlan@xxxxxxxxxx>
---
 src/libvirt_private.syms  |  1 +
 src/util/virstoragefile.c | 10 ++++++++++
 src/util/virstoragefile.h |  3 +++
 3 files changed, 14 insertions(+)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 6893054..ee0db4f 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2124,6 +2124,7 @@ virStorageSourceParseRBDColonString;
 virStorageSourcePoolDefFree;
 virStorageSourcePoolModeTypeFromString;
 virStorageSourcePoolModeTypeToString;
+virStorageSourceSetBackingStore;
 virStorageTypeFromString;
 virStorageTypeToString;
 
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 620f490..d69f49d 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -1817,6 +1817,16 @@ virStorageSourceGetBackingStore(const virStorageSource *src,
 }
 
 
+bool
+virStorageSourceSetBackingStore(virStorageSourcePtr src,
+                                virStorageSourcePtr backingStore,
+                                size_t pos ATTRIBUTE_UNUSED)
+{
+    src->backingStore = backingStore;
+    return !!src->backingStore;
+}
+
+
 /**
  * virStorageSourcePtr:
  *
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index 4262b36..5f76324 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -289,6 +289,9 @@ struct _virStorageSource {
 #  define DEV_BSIZE 512
 # endif
 
+bool virStorageSourceSetBackingStore(virStorageSourcePtr src,
+                                                    virStorageSourcePtr backingStore,
+                                                    size_t pos);
 virStorageSourcePtr virStorageSourceGetBackingStore(const virStorageSource *src,
                                                     size_t pos);
 
-- 
2.3.5

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