netdev - [patch net-next v3 1/3] tools: ynl: allow user to specify flag attr with bool values

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Date: Thu, 22 Feb 2024 14:43:49 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	jacob.e.keller@...el.com,
	swarupkotikalapudi@...il.com,
	donald.hunter@...il.com,
	sdf@...gle.com,
	lorenzo@...nel.org,
	alessandromarcolini99@...il.com
Subject: [patch net-next v3 1/3] tools: ynl: allow user to specify flag attr with bool values

From: Jiri Pirko <jiri@...dia.com>

The flag attr presence in Netlink message indicates value "true",
if it is missing in the message it means "false".

Allow user to specify attrname with value "true"/"false"
in json for flag attrs, treat "false" value properly.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
v2->V3:
- add comment
v1->v2:
- accept other values than "False"
---
 tools/net/ynl/lib/ynl.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/net/ynl/lib/ynl.py b/tools/net/ynl/lib/ynl.py
index f45ee5f29bed..1c5c7662dc9a 100644
--- a/tools/net/ynl/lib/ynl.py
+++ b/tools/net/ynl/lib/ynl.py
@@ -459,6 +459,9 @@ class YnlFamily(SpecFamily):
                 attr_payload += self._add_attr(attr['nested-attributes'],
                                                subname, subvalue, sub_attrs)
         elif attr["type"] == 'flag':
+            if not value:
+                # If value is absent or false then skip attribute creation.
+                return b''
             attr_payload = b''
         elif attr["type"] == 'string':
             attr_payload = str(value).encode('ascii') + b'\x00'
-- 
2.43.2