Re: [PATCH net-next] tools: ynl-gen: handle do ops with no input attrs

[Lorenzo Bianconi <lorenzo.bianconi@redhat.com>]

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> The code supports dumps with no input attributes currently
> thru a combination of special-casing and luck.
> Clean up the handling of ops with no inputs. Create empty
> Structs, and skip printing of empty types.
> This makes dos with no inputs work.
> 
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
> --
> CC: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
> 
> Hi Lorenzo, the StructNone from my initial patch felt a little
> too hacky, so I ditched it :) Could you double check that this
> works the same as the previous version?
> ---
>  tools/net/ynl/ynl-gen-c.py | 17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)

Tested-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>

Regards,
Lorenzo

> 
> diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
> index 168fe612b029..f125b5f704ba 100755
> --- a/tools/net/ynl/ynl-gen-c.py
> +++ b/tools/net/ynl/ynl-gen-c.py
> @@ -1041,9 +1041,11 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, S
>          if op_mode == 'notify':
>              op_mode = 'do'
>          for op_dir in ['request', 'reply']:
> -            if op and op_dir in op[op_mode]:
> -                self.struct[op_dir] = Struct(family, self.attr_set,
> -                                             type_list=op[op_mode][op_dir]['attributes'])
> +            if op:
> +                type_list = []
> +                if op_dir in op[op_mode]:
> +                    type_list = op[op_mode][op_dir]['attributes']
> +                self.struct[op_dir] = Struct(family, self.attr_set, type_list=type_list)
>          if op_mode == 'event':
>              self.struct['reply'] = Struct(family, self.attr_set, type_list=op['event']['attributes'])
>  
> @@ -1752,6 +1754,8 @@ _C_KW = {
>  
>  
>  def print_req_type_helpers(ri):
> +    if len(ri.struct["request"].attr_list) == 0:
> +        return
>      print_alloc_wrapper(ri, "request")
>      print_type_helpers(ri, "request")
>  
> @@ -1773,6 +1777,8 @@ _C_KW = {
>  
>  
>  def print_req_type(ri):
> +    if len(ri.struct["request"].attr_list) == 0:
> +        return
>      print_type(ri, "request")
>  
>  
> @@ -2515,9 +2521,8 @@ _C_KW = {
>                  if 'dump' in op:
>                      cw.p(f"/* {op.enum_name} - dump */")
>                      ri = RenderInfo(cw, parsed, args.mode, op, 'dump')
> -                    if 'request' in op['dump']:
> -                        print_req_type(ri)
> -                        print_req_type_helpers(ri)
> +                    print_req_type(ri)
> +                    print_req_type_helpers(ri)
>                      if not ri.type_consistent:
>                          print_rsp_type(ri)
>                      print_wrapped_type(ri)
> -- 
> 2.41.0
> 

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