netdev - Re: [PATCH iproute2-next 1/4] libnetlink: Add rta_getattr

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Message-ID: <20240308145859.6017bd7f@hermes.local>
Date: Fri, 8 Mar 2024 14:58:59 -0800
From: Stephen Hemminger <stephen@...workplumber.org>
To: Petr Machata <petrm@...dia.com>
Cc: David Ahern <dsahern@...nel.org>, <netdev@...r.kernel.org>, Ido Schimmel
 <idosch@...dia.com>, <mlxsw@...dia.com>
Subject: Re: [PATCH iproute2-next 1/4] libnetlink: Add rta_getattr_uint()

On Fri, 8 Mar 2024 23:29:06 +0100
Petr Machata <petrm@...dia.com> wrote:

> +static inline __u64 rta_getattr_uint(const struct rtattr *rta)
> +{
> +	if (RTA_PAYLOAD(rta) == sizeof(__u32))
> +		return rta_getattr_u32(rta);
> +	return rta_getattr_u64(rta);

Don't understand the use case here.
The kernel always sends the same payload size for the same attribute.