linux-kernel - Re: [PATCH 66/69] ynl: fix nested policy attribute type

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Message-ID: <20230605110631.5a7d8074@kernel.org>
Date:   Mon, 5 Jun 2023 11:06:31 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        davem@...emloft.net, pabeni@...hat.com, edumazet@...gle.com,
        chuck.lever@...cle.com
Subject: Re: [PATCH 66/69] ynl: fix nested policy attribute type

On Mon,  5 Jun 2023 11:46:17 +0200 Arkadiusz Kubalewski wrote:
> When nested attribute is used, generated type in the netlink policy
> is NLA_NEST, which is wrong as there is no such type. Fix be adding
> `ed` sufix for policy generated for 'nest' type attribute.
> 
> Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
> ---
>  tools/net/ynl/ynl-gen-c.py | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
> index 28afb0846143..89603866d4a0 100755
> --- a/tools/net/ynl/ynl-gen-c.py
> +++ b/tools/net/ynl/ynl-gen-c.py
> @@ -113,7 +113,10 @@ class Type(SpecAttr):
>          return '{ .type = ' + policy + ', }'
>  
>      def attr_policy(self, cw):
> -        policy = c_upper('nla-' + self.attr['type'])
> +        if (self.attr['type'] == 'nest'):
> +            policy = c_upper('nla-' + self.attr['type'] + 'ed')
> +        else:
> +            policy = c_upper('nla-' + self.attr['type'])
>  
>          spec = self._attr_policy(policy)
>          cw.p(f"\t[{self.enum_name}] = {spec},")

For nests the policy should come from

  class TypeNest -> def _attr_policy()

why do we need to tweak the default implementation in the parent class?
-- 
pw-bot: cr