This patch adds support for encoding indexed-array
attributes with sub-type nest in pyynl.

Signed-off-by: Asbjørn Sloth Tønnesen <redacted>
---
 tools/net/ynl/pyynl/lib/ynl.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tools/net/ynl/pyynl/lib/ynl.py b/tools/net/ynl/pyynl/lib/ynl.py
index 4928b41c636a..a37294a751da 100644
--- a/tools/net/ynl/pyynl/lib/ynl.py
+++ b/tools/net/ynl/pyynl/lib/ynl.py

@@ -564,6 +564,11 @@ class YnlFamily(SpecFamily):
             nl_type |= Netlink.NLA_F_NESTED
             sub_space = attr['nested-attributes']
             attr_payload = self._add_nest_attrs(value, sub_space, search_attrs)
+        elif attr['type'] == 'indexed-array' and attr['sub-type'] == 'nest':
+            nl_type |= Netlink.NLA_F_NESTED
+            sub_space = attr['nested-attributes']
+            attr_payload = self._encode_indexed_array(value, sub_space,
+                                                      search_attrs)
         elif attr["type"] == 'flag':
             if not value:
                 # If value is absent or false then skip attribute creation.

@@ -617,6 +622,9 @@ class YnlFamily(SpecFamily):
         else:
             raise Exception(f'Unknown type at {space} {name} {value} {attr["type"]}')
 
+        return self._add_attr_raw(nl_type, attr_payload)
+
+    def _add_attr_raw(self, nl_type, attr_payload):
         pad = b'\x00' * ((4 - len(attr_payload) % 4) % 4)
         return struct.pack('HH', len(attr_payload) + 4, nl_type) + attr_payload + pad
 

@@ -628,6 +636,15 @@ class YnlFamily(SpecFamily):
                                            sub_attrs)
         return attr_payload
 
+    def _encode_indexed_array(self, vals, sub_space, search_attrs):
+        attr_payload = b''
+        nested_flag = Netlink.NLA_F_NESTED