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-rw-r--r--Documentation/userspace-api/netlink/genetlink-legacy.rst22
1 files changed, 16 insertions, 6 deletions
diff --git a/Documentation/userspace-api/netlink/genetlink-legacy.rst b/Documentation/userspace-api/netlink/genetlink-legacy.rst
index 70a77387f6..fa00598919 100644
--- a/Documentation/userspace-api/netlink/genetlink-legacy.rst
+++ b/Documentation/userspace-api/netlink/genetlink-legacy.rst
@@ -46,10 +46,16 @@ For reference the ``multi-attr`` array may look like this::
where ``ARRAY-ATTR`` is the array entry type.
-array-nest
-~~~~~~~~~~
+indexed-array
+~~~~~~~~~~~~~
+
+``indexed-array`` wraps the entire array in an extra attribute (hence
+limiting its size to 64kB). The ``ENTRY`` nests are special and have the
+index of the entry as their type instead of normal attribute type.
-``array-nest`` creates the following structure::
+A ``sub-type`` is needed to describe what type in the ``ENTRY``. A ``nest``
+``sub-type`` means there are nest arrays in the ``ENTRY``, with the structure
+looks like::
[SOME-OTHER-ATTR]
[ARRAY-ATTR]
@@ -60,9 +66,13 @@ array-nest
[MEMBER1]
[MEMBER2]
-It wraps the entire array in an extra attribute (hence limiting its size
-to 64kB). The ``ENTRY`` nests are special and have the index of the entry
-as their type instead of normal attribute type.
+Other ``sub-type`` like ``u32`` means there is only one member as described
+in ``sub-type`` in the ``ENTRY``. The structure looks like::
+
+ [SOME-OTHER-ATTR]
+ [ARRAY-ATTR]
+ [ENTRY u32]
+ [ENTRY u32]
type-value
~~~~~~~~~~