Signed-off-by: Nikolai Barybin <nikolai.barybin@xxxxxxxxxxxxx>
---
src/storage_file/storage_source.c | 39 +++++++++++++++++++++++++++++++
src/storage_file/storage_source.h | 4 ++++
2 files changed, 43 insertions(+)
diff --git a/src/storage_file/storage_source.c b/src/storage_file/storage_source.c
index 2cfe3bc325..b9d2d71aea 100644
--- a/src/storage_file/storage_source.c
+++ b/src/storage_file/storage_source.c
@@ -543,6 +543,33 @@ virStorageSourceNewFromBacking(virStorageSource *parent,
}
+/**
+ * virStorageSourceNewFromDataFile:
+ * @parent: storage source parent
+ * @dataFileSrc: returned data file source definition
+ *
+ * Creates a storage source which describes the data file image of @parent.
+ * Returned storage source format is VIR_STORAGE_FILE_RAW, and, unlike
+ * backing storage creation, readonly flag is copied from @parent.
+ *
+ * Return codes are the same as in virStorageSourceNewFromChild.
+ */
+int
+virStorageSourceNewFromDataFile(virStorageSource *parent,
+ virStorageSource **dataFileSrc)
+{
+ if (virStorageSourceNewFromChild(parent,
+ parent->dataFileRaw,
+ dataFileSrc) < 0)
+ return -1;
+
+ (*dataFileSrc)->format = VIR_STORAGE_FILE_RAW;
+ (*dataFileSrc)->readonly = parent->readonly;
+
+ return 0;
+}
+
+
/**
* @src: disk source definition structure
* @fd: file descriptor
@@ -1391,6 +1418,18 @@ virStorageSourceGetMetadataRecurse(virStorageSource *src,
}
}
+ if (src->dataFileRaw) {
+ g_autoptr(virStorageSource) dataFileStore = NULL;
+ if ((rv = virStorageSourceNewFromDataFile(src, &dataFileStore)) < 0)
+ return -1;
+
+ /* the data file would not be usable for VM usage */
+ if (rv == 1)
+ return 0;
+
+ src->dataFileStore = g_steal_pointer(&dataFileStore);
+ }
+
if (src->backingStoreRaw) {
if ((rv = virStorageSourceNewFromBacking(src, &backingStore)) < 0)
return -1;
diff --git a/src/storage_file/storage_source.h b/src/storage_file/storage_source.h
index 63fefb6919..78b31e405a 100644
--- a/src/storage_file/storage_source.h
+++ b/src/storage_file/storage_source.h
@@ -72,6 +72,10 @@ int
virStorageSourceNewFromBacking(virStorageSource *parent,
virStorageSource **backing);
+int
+virStorageSourceNewFromDataFile(virStorageSource *parent,
+ virStorageSource **dataFileSrc);
+
int
virStorageSourceGetRelativeBackingPath(virStorageSource *top,
virStorageSource *base,
--
2.43.5
