From: Jakub Kicinski Date: Thu, 24 Aug 2023 00:30:55 +0000 (-0700) Subject: tools: ynl-gen: support empty attribute lists X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4c8c24e801e60a2b4a6f78401c9b7cb6cbf47cbf;p=linux.git tools: ynl-gen: support empty attribute lists Differentiate between empty list and None for member lists. New families may want to create request responses with no attribute. If we treat those the same as None we end up rendering a full parsing policy in user space, instead of an empty one. Reviewed-by: Donald Hunter Link: https://lore.kernel.org/r/20230824003056.1436637-5-kuba@kernel.org Signed-off-by: Jakub Kicinski --- diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py index 13d06931c045e..9209bdcca9c61 100755 --- a/tools/net/ynl/ynl-gen-c.py +++ b/tools/net/ynl/ynl-gen-c.py @@ -615,7 +615,7 @@ class Struct: self.attr_list = [] self.attrs = dict() - if type_list: + if type_list is not None: for t in type_list: self.attr_list.append((t, self.attr_set[t]),) else: @@ -1543,7 +1543,14 @@ def parse_rsp_msg(ri, deref=False): ri.cw.write_func_prot('int', f'{op_prefix(ri, "reply", deref=deref)}_parse', func_args) - _multi_parse(ri, ri.struct["reply"], init_lines, local_vars) + if ri.struct["reply"].member_list(): + _multi_parse(ri, ri.struct["reply"], init_lines, local_vars) + else: + # Empty reply + ri.cw.block_start() + ri.cw.p('return MNL_CB_OK;') + ri.cw.block_end() + ri.cw.nl() def print_req(ri):