[PATCH net-next v2 08/12] tools: ynl-gen: support local attrs in _multi_parse

[Jakub Kicinski <kuba@kernel.org>]

The _multi_parse() helper calls the _attr_get() method of each attr,
but it only respects what code the helper wants to emit, not what
local variables it needs. Local variables will soon be needed,
support them.

Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 tools/net/ynl/pyynl/ynl_gen_c.py | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/tools/net/ynl/pyynl/ynl_gen_c.py b/tools/net/ynl/pyynl/ynl_gen_c.py
index bd1fadb2cf5a..f2a4404d0d21 100755
--- a/tools/net/ynl/pyynl/ynl_gen_c.py
+++ b/tools/net/ynl/pyynl/ynl_gen_c.py
@@ -2214,12 +2214,16 @@ _C_KW = {
     parse_rsp_nested_prototype(ri, struct, suffix='')
 
     var = 'dst'
+    local_vars = {'const struct nlattr *attr = nested;',
+                  f'{struct.ptr_name}{var} = yarg->data;',
+                  'struct ynl_parse_arg parg;'}
+
+    for _, arg in struct.member_list():
+        _, _, l_vars = arg._attr_get(ri, var)
+        local_vars |= set(l_vars) if l_vars else set()
 
     ri.cw.block_start()
-    ri.cw.write_func_lvar(['const struct nlattr *attr = nested;',
-                          f'{struct.ptr_name}{var} = yarg->data;',
-                          'struct ynl_parse_arg parg;'])
-
+    ri.cw.write_func_lvar(list(local_vars))
     ri.cw.p('parg.ys = yarg->ys;')
     ri.cw.nl()
 
-- 
2.49.0