tools: ynl-gen: fill in missing empty attr lists

The C codegen refers to op attribute lists all over the place,
without checking if they are present, even tho attribute list
is technically an optional property. Add them automatically
at init if missing so that we don't have to make specs longer.

Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20250429154704.2613851-4-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/tools/net/ynl/pyynl/ynl_gen_c.py b/tools/net/ynl/pyynl/ynl_gen_c.py
index 90f7fe6b623bd76c5027febe88d47a1f6ca94e9a..898c41a7a81fe82484eb64b688d2bbe530c93d2a 100755 (executable)
--- a/tools/net/ynl/pyynl/ynl_gen_c.py
+++ b/tools/net/ynl/pyynl/ynl_gen_c.py
@@ -938,6 +938,14 @@ class AttrSet(SpecAttrSet):
 
 class Operation(SpecOperation):
     def __init__(self, family, yaml, req_value, rsp_value):
+        # Fill in missing operation properties (for fixed hdr-only msgs)
+        for mode in ['do', 'dump', 'event']:
+            for direction in ['request', 'reply']:
+                try:
+                    yaml[mode][direction].setdefault('attributes', [])
+                except KeyError:
+                    pass
+
         super().__init__(family, yaml, req_value, rsp_value)
 
         self.render_name = c_lower(family.ident_name + '_' + self.name)