From: Andy Gospodarek <andy@greyhouse.net>
Date: Mon, 17 Jul 2017 16:14:19 -0400
Subject: samples/bpf: add option for native and skb mode for redirect apps
Patch-mainline: v4.14-rc1
Git-commit: 24251c264798ac5a72667245c2650676d7ac2108
References: bsc#1109837
When testing with a driver that has both native and generic redirect support:
$ sudo ./samples/bpf/xdp_redirect -N 5 6
input: 5 output: 6
ifindex 6: 4961879 pkt/s
ifindex 6: 6391319 pkt/s
ifindex 6: 6419468 pkt/s
$ sudo ./samples/bpf/xdp_redirect -S 5 6
input: 5 output: 6
ifindex 6: 1845435 pkt/s
ifindex 6: 3882850 pkt/s
ifindex 6: 3893974 pkt/s
$ sudo ./samples/bpf/xdp_redirect_map -N 5 6
input: 5 output: 6
map[0] (vports) = 4, map[1] (map) = 5, map[2] (count) = 0
ifindex 6: 2207374 pkt/s
ifindex 6: 6212869 pkt/s
ifindex 6: 6286515 pkt/s
$ sudo ./samples/bpf/xdp_redirect_map -S 5 6
input: 5 output: 6
map[0] (vports) = 4, map[1] (map) = 5, map[2] (count) = 0
ifindex 6: 5052528 pkt/s
ifindex 6: 5736631 pkt/s
ifindex 6: 5739962 pkt/s
Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
samples/bpf/xdp_redirect_map_user.c | 48 ++++++++++++++++++++++++++++++------
samples/bpf/xdp_redirect_user.c | 48 ++++++++++++++++++++++++++++++------
2 files changed, 80 insertions(+), 16 deletions(-)
--- a/samples/bpf/xdp_redirect_map_user.c
+++ b/samples/bpf/xdp_redirect_map_user.c
@@ -10,6 +10,7 @@
* General Public License for more details.
*/
#include <linux/bpf.h>
+#include <linux/if_link.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
@@ -17,6 +18,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <libgen.h>
#include "bpf_load.h"
#include "bpf_util.h"
@@ -25,9 +27,11 @@
static int ifindex_in;
static int ifindex_out;
+static __u32 xdp_flags;
+
static void int_exit(int sig)
{
- set_link_xdp_fd(ifindex_in, -1, 0);
+ set_link_xdp_fd(ifindex_in, -1, xdp_flags);
exit(0);
}
@@ -56,20 +60,47 @@ static void poll_stats(int interval, int
}
}
-int main(int ac, char **argv)
+static void usage(const char *prog)
+{
+ fprintf(stderr,
+ "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n"
+ "OPTS:\n"
+ " -S use skb-mode\n"
+ " -N enforce native mode\n",
+ prog);
+}
+
+
+int main(int argc, char **argv)
{
+ const char *optstr = "SN";
char filename[256];
- int ret, key = 0;
+ int ret, opt, key = 0;
- snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
+ while ((opt = getopt(argc, argv, optstr)) != -1) {
+ switch (opt) {
+ case 'S':
+ xdp_flags |= XDP_FLAGS_SKB_MODE;
+ break;
+ case 'N':
+ xdp_flags |= XDP_FLAGS_DRV_MODE;
+ break;
+ default:
+ usage(basename(argv[0]));
+ return 1;
+ }
+ }
- if (ac != 3) {
+ if (optind == argc) {
printf("usage: %s IFINDEX_IN IFINDEX_OUT\n", argv[0]);
return 1;
}
- ifindex_in = strtoul(argv[1], NULL, 0);
- ifindex_out = strtoul(argv[2], NULL, 0);
+ ifindex_in = strtoul(argv[optind], NULL, 0);
+ ifindex_out = strtoul(argv[optind + 1], NULL, 0);
+ printf("input: %d output: %d\n", ifindex_in, ifindex_out);
+
+ snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
if (load_bpf_file(filename)) {
printf("%s", bpf_log_buf);
@@ -82,8 +113,9 @@ int main(int ac, char **argv)
}
signal(SIGINT, int_exit);
+ signal(SIGTERM, int_exit);
- if (set_link_xdp_fd(ifindex_in, prog_fd[0], 0) < 0) {
+ if (set_link_xdp_fd(ifindex_in, prog_fd[0], xdp_flags) < 0) {
printf("link set xdp fd failed\n");
return 1;
}
--- a/samples/bpf/xdp_redirect_user.c
+++ b/samples/bpf/xdp_redirect_user.c
@@ -10,6 +10,7 @@
* General Public License for more details.
*/
#include <linux/bpf.h>
+#include <linux/if_link.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
@@ -17,6 +18,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <libgen.h>
#include "bpf_load.h"
#include "bpf_util.h"
@@ -25,9 +27,11 @@
static int ifindex_in;
static int ifindex_out;
+static __u32 xdp_flags;
+
static void int_exit(int sig)
{
- set_link_xdp_fd(ifindex_in, -1, 0);
+ set_link_xdp_fd(ifindex_in, -1, xdp_flags);
exit(0);
}
@@ -56,20 +60,47 @@ static void poll_stats(int interval, int
}
}
-int main(int ac, char **argv)
+static void usage(const char *prog)
+{
+ fprintf(stderr,
+ "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n"
+ "OPTS:\n"
+ " -S use skb-mode\n"
+ " -N enforce native mode\n",
+ prog);
+}
+
+
+int main(int argc, char **argv)
{
+ const char *optstr = "SN";
char filename[256];
- int ret, key = 0;
+ int ret, opt, key = 0;
- snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
+ while ((opt = getopt(argc, argv, optstr)) != -1) {
+ switch (opt) {
+ case 'S':
+ xdp_flags |= XDP_FLAGS_SKB_MODE;
+ break;
+ case 'N':
+ xdp_flags |= XDP_FLAGS_DRV_MODE;
+ break;
+ default:
+ usage(basename(argv[0]));
+ return 1;
+ }
+ }
- if (ac != 3) {
+ if (optind == argc) {
printf("usage: %s IFINDEX_IN IFINDEX_OUT\n", argv[0]);
return 1;
}
- ifindex_in = strtoul(argv[1], NULL, 0);
- ifindex_out = strtoul(argv[2], NULL, 0);
+ ifindex_in = strtoul(argv[optind], NULL, 0);
+ ifindex_out = strtoul(argv[optind + 1], NULL, 0);
+ printf("input: %d output: %d\n", ifindex_in, ifindex_out);
+
+ snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
if (load_bpf_file(filename)) {
printf("%s", bpf_log_buf);
@@ -82,8 +113,9 @@ int main(int ac, char **argv)
}
signal(SIGINT, int_exit);
+ signal(SIGTERM, int_exit);
- if (set_link_xdp_fd(ifindex_in, prog_fd[0], 0) < 0) {
+ if (set_link_xdp_fd(ifindex_in, prog_fd[0], xdp_flags) < 0) {
printf("link set xdp fd failed\n");
return 1;
}