Re: [PATCH bpf-next v2 10/11] selftests/xsk: display command line options with -h

[Maciej Fijalkowski <maciej.fijalkowski@intel.com>]

On Thu, Aug 24, 2023 at 02:28:52PM +0200, Magnus Karlsson wrote:
> From: Magnus Karlsson <magnus.karlsson@intel.com>
> 
> Add the -h option to display all available command line options
> available for test_xsk.sh and xskxceiver.
> 
> Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
> ---
>  tools/testing/selftests/bpf/test_xsk.sh  | 11 ++++++++++-
>  tools/testing/selftests/bpf/xskxceiver.c |  5 ++++-
>  2 files changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
> index b7186ae48497..9ec718043c1a 100755
> --- a/tools/testing/selftests/bpf/test_xsk.sh
> +++ b/tools/testing/selftests/bpf/test_xsk.sh
> @@ -82,12 +82,15 @@
>  #
>  # Run a specific test from the test suite
>  #   sudo ./test_xsk.sh -t TEST_NAME
> +#
> +# Display the available command line options
> +#   ./test_xsk.sh -h
>  
>  . xsk_prereqs.sh
>  
>  ETH=""
>  
> -while getopts "vi:dm:lt:" flag
> +while getopts "vi:dm:lt:h" flag
>  do
>  	case "${flag}" in
>  		v) verbose=1;;
> @@ -96,6 +99,7 @@ do
>  		m) XSKTEST_MODE=${OPTARG};;
>  		l) list=1;;
>  		t) XSKTEST_TEST=${OPTARG};;
> +		h) help=1;;
>  	esac
>  done
>  
> @@ -148,6 +152,11 @@ if [[ $list -eq 1 ]]; then
>          exit
>  fi
>  
> +if [[ $help -eq 1 ]]; then
> +	./${XSKOBJ}
> +        exit
> +fi
> +
>  if [ ! -z $ETH ]; then
>  	VETH0=${ETH}
>  	VETH1=${ETH}
> diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
> index 19db9a827c30..9feb476d647f 100644
> --- a/tools/testing/selftests/bpf/xskxceiver.c
> +++ b/tools/testing/selftests/bpf/xskxceiver.c
> @@ -318,6 +318,7 @@ static struct option long_options[] = {
>  	{"mode", required_argument, 0, 'm'},
>  	{"list", no_argument, 0, 'l'},
>  	{"test", required_argument, 0, 't'},
> +	{"help", no_argument, 0, 'h'},
>  	{0, 0, 0, 0}
>  };
>  
> @@ -331,7 +332,8 @@ static void print_usage(char **argv)
>  		"  -b, --busy-poll      Enable busy poll\n"
>  		"  -m, --mode           Run only mode skb, drv, or zc\n"
>  		"  -l, --list           List all available tests\n"
> -		"  -t, --test           Run a specific test. Enter number from -l option.\n";
> +		"  -t, --test           Run a specific test. Enter number from -l option.\n"
> +		"  -h, --help           Display this help and exit\n";
>  
>  	ksft_print_msg(str, basename(argv[0]));
>  	ksft_exit_xfail();
> @@ -406,6 +408,7 @@ static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj
>  			if (errno)
>  				print_usage(argv);
>  			break;
> +		case 'h':

do you need 'fallthrough' here?

>  		default:
>  			print_usage(argv);
>  		}
> -- 
> 2.34.1
>