linux-kernel - [PATCH net-next v3 11/13] tools: ynl: encode indexed-arrays

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Message-ID: <20250911200508.79341-12-ast@fiberby.net>
Date: Thu, 11 Sep 2025 20:05:04 +0000
From: Asbjørn Sloth Tønnesen <ast@...erby.net>
To: "Jason A. Donenfeld" <Jason@...c4.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	Donald Hunter <donald.hunter@...il.com>,
	Simon Horman <horms@...nel.org>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Sabrina Dubroca <sd@...asysnail.net>,
	wireguard@...ts.zx2c4.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v3 11/13] tools: ynl: encode indexed-arrays

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

Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
---
 tools/net/ynl/pyynl/lib/ynl.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tools/net/ynl/pyynl/lib/ynl.py b/tools/net/ynl/pyynl/lib/ynl.py
index 92ff26f34f4d..9fd83f8b091f 100644
--- a/tools/net/ynl/pyynl/lib/ynl.py
+++ b/tools/net/ynl/pyynl/lib/ynl.py
@@ -563,6 +563,11 @@ 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.
@@ -616,6 +621,9 @@ 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
 
@@ -627,6 +635,14 @@ class YnlFamily(SpecFamily):
                                            sub_attrs)
         return attr_payload
 
+    def _encode_indexed_array(self, vals, sub_space, search_attrs):
+        attr_payload = b''
+        for i, val in enumerate(vals):
+            idx = i | Netlink.NLA_F_NESTED
+            val_payload = self._add_nest_attrs(val, sub_space, search_attrs)
+            attr_payload += self._add_attr_raw(idx, val_payload)
+        return attr_payload
+
     def _get_enum_or_unknown(self, enum, raw):
         try:
             name = enum.entries_by_val[raw].name
-- 
2.51.0