Signed-off-by: Djalal Harouni <tix...@opendz.org>
---
 metadata.c | 3 ++-
 metadata.h | 8 +++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/metadata.c b/metadata.c
index eb286aa..3dff9ac 100644
--- a/metadata.c
+++ b/metadata.c
@@ -130,7 +130,8 @@ kdbus_meta_append_item(struct kdbus_meta *meta, u64 type, 
size_t payload_size)
  * kdbus_meta_append_data() - append given raw data to metadata object
  * @meta:              Metadata object
  * @type:              KDBUS_ITEM_* type
- * @data:              pointer to data to copy from
+ * @data:              pointer to data to copy from. If it is NULL
+ *                     then just make space in the metadata buffer.
  * @len:               number of bytes to copy
  *
  * Return: 0 on success, negative errno on failure.
diff --git a/metadata.h b/metadata.h
index a142aea..1bdb537 100644
--- a/metadata.h
+++ b/metadata.h
@@ -16,10 +16,16 @@
 /**
  * struct kdbus_meta - metadata buffer
  * @attached:          Flags for already attached data
- * @domain:                    Domain the metadata belongs to
+ * @domain:            Domain the metadata belongs to
  * @data:              Allocated buffer
  * @size:              Number of bytes used
  * @allocated_size:    Size of buffer
+ * @creds_item_off     The offset of the creds item in the @data
+ *                     buffer field, if the user requested this
+ *                     metainfo in its attach flags. 0 if unused.
+ * @auxgrps_item_off   The offset of the auxgroups item in the
+ *                     @data buffer field, if the user requested
+ *                     this metainfo. 0 if unused.
  *
  * Used to collect and store connection metadata in a pre-compiled
  * buffer containing struct kdbus_item.
-- 
1.9.3

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