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Diffstat (limited to 'samples/bpf/xdp_fwd_user.c')
-rw-r--r--samples/bpf/xdp_fwd_user.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/samples/bpf/xdp_fwd_user.c b/samples/bpf/xdp_fwd_user.c
index 97ff1dad7669..c30f9acfdb84 100644
--- a/samples/bpf/xdp_fwd_user.c
+++ b/samples/bpf/xdp_fwd_user.c
@@ -27,11 +27,13 @@
#include "libbpf.h"
#include <bpf/bpf.h>
+static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
+
static int do_attach(int idx, int prog_fd, int map_fd, const char *name)
{
int err;
- err = bpf_set_link_xdp_fd(idx, prog_fd, 0);
+ err = bpf_set_link_xdp_fd(idx, prog_fd, xdp_flags);
if (err < 0) {
printf("ERROR: failed to attach program to %s\n", name);
return err;
@@ -49,7 +51,7 @@ static int do_detach(int idx, const char *name)
{
int err;
- err = bpf_set_link_xdp_fd(idx, -1, 0);
+ err = bpf_set_link_xdp_fd(idx, -1, xdp_flags);
if (err < 0)
printf("ERROR: failed to detach program from %s\n", name);
@@ -83,11 +85,17 @@ int main(int argc, char **argv)
int attach = 1;
int ret = 0;
- while ((opt = getopt(argc, argv, ":dD")) != -1) {
+ while ((opt = getopt(argc, argv, ":dDSF")) != -1) {
switch (opt) {
case 'd':
attach = 0;
break;
+ case 'S':
+ xdp_flags |= XDP_FLAGS_SKB_MODE;
+ break;
+ case 'F':
+ xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
+ break;
case 'D':
prog_name = "xdp_fwd_direct";
break;
@@ -97,6 +105,9 @@ int main(int argc, char **argv)
}
}
+ if (!(xdp_flags & XDP_FLAGS_SKB_MODE))
+ xdp_flags |= XDP_FLAGS_DRV_MODE;
+
if (optind == argc) {
usage(basename(argv[0]));
return 1;