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

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Date: Fri, 25 Aug 2023 15:06:35 +0200
From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To: Magnus Karlsson <magnus.karlsson@...il.com>
CC: <magnus.karlsson@...el.com>, <bjorn@...nel.org>, <ast@...nel.org>,
	<daniel@...earbox.net>, <netdev@...r.kernel.org>, <bpf@...r.kernel.org>,
	<yhs@...com>, <andrii@...nel.org>, <martin.lau@...ux.dev>, <song@...nel.org>,
	<john.fastabend@...il.com>, <kpsingh@...nel.org>, <sdf@...gle.com>,
	<haoluo@...gle.com>, <jolsa@...nel.org>, <przemyslaw.kitszel@...el.com>
Subject: Re: [PATCH bpf-next v2 10/11] selftests/xsk: display command line
 options with -h

On Fri, Aug 25, 2023 at 02:54:01PM +0200, Magnus Karlsson wrote:
> On Fri, 25 Aug 2023 at 14:50, Maciej Fijalkowski
> <maciej.fijalkowski@...el.com> wrote:
> >
> > On Thu, Aug 24, 2023 at 02:28:52PM +0200, Magnus Karlsson wrote:
> > > From: Magnus Karlsson <magnus.karlsson@...el.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@...el.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?
> 
> Did not get any complaints from checkpatch, so do not know since it is
> a case without any content on its own. I would say it is obvious that
> it is "falling through" in this case :-). But I do not know what the
> rule is.

Sorry for the noise it's fine i quickly tested that with
-Wimplicit-fallthrough.

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