Re: [bpf-next PATCH 1/7] bpf: refactor sockmap sample program update for arg parsing

On 01/09/2018 05:30 AM, Jesper Dangaard Brouer wrote:

On Mon, 08 Jan 2018 10:05:07 -0800
John Fastabend [off-list ref] wrote:

quoted

sockmap sample program takes arguments from cmd line but it reads them
in using offsets into the array. Because we want to add more arguments
in the future lets do proper argument handling.

Also refactor code to pull apart sock init and ping/pong test. This
allows us to add new tests in the future.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
---
 samples/sockmap/sockmap_user.c |  142 +++++++++++++++++++++++++++++-----------
 1 file changed, 103 insertions(+), 39 deletions(-)

diff --git a/samples/sockmap/sockmap_user.c b/samples/sockmap/sockmap_user.c
index 7cc9d22..5cbe7a5 100644
--- a/samples/sockmap/sockmap_user.c
+++ b/samples/sockmap/sockmap_user.c

@@ -35,6 +35,8 @@
 #include <assert.h>
 #include <libgen.h>
 
+#include <getopt.h>
+
 #include "../bpf/bpf_load.h"
 #include "../bpf/bpf_util.h"
 #include "../bpf/libbpf.h"

@@ -46,15 +48,39 @@
 #define S1_PORT 10000
 #define S2_PORT 10001
 
-static int sockmap_test_sockets(int rate, int dot)
+/* global sockets */
+int s1, s2, c1, c2, p1, p2;
+
+static const struct option long_options[] = {
+	{"help",	no_argument,		NULL, 'h' },
+	{"cgroup",	required_argument,	NULL, 'c' },
+	{"rate",	required_argument,	NULL, 'r' },
+	{"verbose",	no_argument,		NULL, 'v' },
+	{0, 0, NULL, 0 }
+};
+
+static void usage(char *argv[])
+{
+	int i;
+
+	printf(" Usage: %s --cgroup <cgroup_path>\n", argv[0]);
+	printf(" options:\n");
+	for (i = 0; long_options[i].name != 0; i++) {
+		printf(" --%-12s", long_options[i].name);
+		if (long_options[i].flag != NULL)
+			printf(" flag (internal value:%d)\n",
+				*long_options[i].flag);
+		else
+			printf(" -%c\n", long_options[i].val);
+	}
+	printf("\n");
+}
+

I love that you are using --long-options :-)

Yep, saw it being used in xdp_rxq_info_user.c

Acked-by: Jesper Dangaard Brouer <redacted>