feat(snapshot): blob iteration to get the parent blob

Signed-off-by: Hrudaya <[email protected]>
openebs · Dec 21, 2023 · 2d94be9 · 2d94be9
1 parent 226fad7
commit 2d94be9
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Showing 2 changed files with 26 additions and 0 deletions.
diff --git a/include/spdk/blob.h b/include/spdk/blob.h
@@ -1055,6 +1055,14 @@ void spdk_bs_iter_first(struct spdk_blob_store *bs,
 void spdk_bs_iter_next(struct spdk_blob_store *bs, struct spdk_blob *blob,
 		       spdk_blob_op_with_handle_complete cb_fn, void *cb_arg);
 
+/**
+ * Get the parent blob by using the current blob. 
+ *
+  * \param blob The current blob.
+  * 
+  * \return if parent blob exist send blob else NULL.
+ */
+struct spdk_blob *spdk_bs_iter_parent(struct spdk_blob *blob);
 /**
  * Set an extended attribute for the given blob.
  *

diff --git a/lib/blob/blobstore.c b/lib/blob/blobstore.c
@@ -8459,6 +8459,24 @@ spdk_bs_iter_next(struct spdk_blob_store *bs, struct spdk_blob *blob,
 	spdk_blob_close(blob, bs_iter_close_cpl, ctx);
 }
 
+struct spdk_blob *spdk_bs_iter_parent(struct spdk_blob *blob) {
+	spdk_blob_id blob_id;
+	struct spdk_blob *parent_blob;
+
+	assert(blob != NULL);
+
+	if (blob->parent_id == SPDK_BLOBID_INVALID) {
+		return NULL;
+	}
+
+	blob_id = blob->parent_id;
+	parent_blob = blob_lookup(blob->bs, blob_id);
+
+	if (parent_blob == NULL) {
+		return NULL;
+	}
+	return parent_blob;
+}
 static int
 blob_set_xattr(struct spdk_blob *blob, const char *name, const void *value,
 	       uint16_t value_len, bool internal)