Re: [PATCH net] selftests/net: udpgso_bench_rx: fix port argument

[Paolo Abeni <pabeni@redhat.com>]

On Thu, 2021-11-11 at 06:57 -0500, Willem de Bruijn wrote:
> From: Willem de Bruijn <willemb@google.com>
> 
> The below commit added optional support for passing a bind address.
> It configures the sockaddr bind arguments before parsing options and
> reconfigures on options -b and -4.
> 
> This broke support for passing port (-p) on its own.
> 
> Configure sockaddr after parsing all arguments.
> 
> Fixes: 3327a9c46352 ("selftests: add functionals test for UDP GRO")
> Reported-by: Eric Dumazet <edumazet@google.com>
> Signed-off-by: Willem de Bruijn <willemb@google.com>
> ---
>  tools/testing/selftests/net/udpgso_bench_rx.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/net/udpgso_bench_rx.c b/tools/testing/selftests/net/udpgso_bench_rx.c
> index 76a24052f4b4..6a193425c367 100644
> --- a/tools/testing/selftests/net/udpgso_bench_rx.c
> +++ b/tools/testing/selftests/net/udpgso_bench_rx.c
> @@ -293,19 +293,17 @@ static void usage(const char *filepath)
>  
>  static void parse_opts(int argc, char **argv)
>  {
> +	const char *bind_addr = NULL;
>  	int c;
>  
> -	/* bind to any by default */
> -	setup_sockaddr(PF_INET6, "::", &cfg_bind_addr);
>  	while ((c = getopt(argc, argv, "4b:C:Gl:n:p:rR:S:tv")) != -1) {
>  		switch (c) {
>  		case '4':
>  			cfg_family = PF_INET;
>  			cfg_alen = sizeof(struct sockaddr_in);
> -			setup_sockaddr(PF_INET, "0.0.0.0", &cfg_bind_addr);
>  			break;
>  		case 'b':
> -			setup_sockaddr(cfg_family, optarg, &cfg_bind_addr);
> +			bind_addr = optarg;
>  			break;
>  		case 'C':
>  			cfg_connect_timeout_ms = strtoul(optarg, NULL, 0);
> @@ -341,6 +339,11 @@ static void parse_opts(int argc, char **argv)
>  		}
>  	}
>  
> +	if (!bind_addr)
> +		bind_addr = cfg_family == PF_INET6 ? "::" : "0.0.0.0";
> +
> +	setup_sockaddr(cfg_family, bind_addr, &cfg_bind_addr);
> +
>  	if (optind != argc)
>  		usage(argv[0]);
>  
LGTM, thanks Willem,

Acked-by: Paolo Abeni <pabeni@redhat.com>