tools: ynl: fix setting presence bits in simple nests

[ Upstream commit f6c8f5e8694c7a78c94e408b628afa6255cc428a ]

When we set members of simple nested structures in requests
we need to set "presence" bits for all the nesting layers
below. This has nothing to do with the presence type of
the last layer.

Fixes: be5bea1cc0bf ("net: add basic C code generators for Netlink")
Reviewed-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240321020214.1250202-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 897af958cee85208b54f175ad50dec826bd322c2..575b7e248e521277d5f580f318298be77e22edf7 100755 (executable)
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -198,8 +198,11 @@ class Type(SpecAttr):
         presence = ''
         for i in range(0, len(ref)):
             presence = f"{var}->{'.'.join(ref[:i] + [''])}_present.{ref[i]}"
-            if self.presence_type() == 'bit':
-                code.append(presence + ' = 1;')
+            # Every layer below last is a nest, so we know it uses bit presence
+            # last layer is "self" and may be a complex type
+            if i == len(ref) - 1 and self.presence_type() != 'bit':
+                continue
+            code.append(presence + ' = 1;')
         code += self._setter_lines(ri, member, presence)
 
         func_name = f"{op_prefix(ri, direction, deref=deref)}_set_{'_'.join(ref)}"