samples/bpf: add option for native and skb mode for redirect apps

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>

diff --git a/samples/bpf/xdp_redirect_map_user.c b/samples/bpf/xdp_redirect_map_user.c
index 0b8009a..a1ad00f 100644 (file)
--- 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 ifindex)
        }
 }
 
-int main(int ac, char **argv)
+static void usage(const char *prog)
 {
-       char filename[256];
-       int ret, key = 0;
+       fprintf(stderr,
+               "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n"
+               "OPTS:\n"
+               "    -S    use skb-mode\n"
+               "    -N    enforce native mode\n",
+               prog);
+}
 
-       snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
-       if (ac != 3) {
+int main(int argc, char **argv)
+{
+       const char *optstr = "SN";
+       char filename[256];
+       int ret, opt, key = 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 (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;
        }

diff --git a/samples/bpf/xdp_redirect_user.c b/samples/bpf/xdp_redirect_user.c
index 761a91d..f705a19 100644 (file)
--- 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 ifindex)
        }
 }
 
-int main(int ac, char **argv)
+static void usage(const char *prog)
 {
-       char filename[256];
-       int ret, key = 0;
+       fprintf(stderr,
+               "usage: %s [OPTS] IFINDEX_IN IFINDEX_OUT\n\n"
+               "OPTS:\n"
+               "    -S    use skb-mode\n"
+               "    -N    enforce native mode\n",
+               prog);
+}
 
-       snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
-       if (ac != 3) {
+int main(int argc, char **argv)
+{
+       const char *optstr = "SN";
+       char filename[256];
+       int ret, opt, key = 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 (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;
        }