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authorMatteo Croce <mcroce@redhat.com>2018-12-01 01:23:06 +0100
committerAlexei Starovoitov <ast@kernel.org>2018-11-30 22:06:41 -0800
commitdc378a1ab5b6009629a3f8410f8b3030ac6b14c9 (patch)
treecdd8e745aba4dd3f7eeb1c8d4c6630e2deb4f56a /samples/bpf/xdp1_user.c
parentd606ee5c1d9a9bc4d1bba3c36fae615447f9851c (diff)
downloadlinux-stericsson-dc378a1ab5b6009629a3f8410f8b3030ac6b14c9.tar.gz
samples: bpf: get ifindex from ifname
Find the ifindex with if_nametoindex() instead of requiring the numeric ifindex. Signed-off-by: Matteo Croce <mcroce@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'samples/bpf/xdp1_user.c')
-rw-r--r--samples/bpf/xdp1_user.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/samples/bpf/xdp1_user.c b/samples/bpf/xdp1_user.c
index 4f3d824fc044..0a197f86ac43 100644
--- a/samples/bpf/xdp1_user.c
+++ b/samples/bpf/xdp1_user.c
@@ -15,6 +15,7 @@
#include <unistd.h>
#include <libgen.h>
#include <sys/resource.h>
+#include <net/if.h>
#include "bpf_util.h"
#include "bpf/bpf.h"
@@ -59,7 +60,7 @@ static void poll_stats(int map_fd, int interval)
static void usage(const char *prog)
{
fprintf(stderr,
- "usage: %s [OPTS] IFINDEX\n\n"
+ "usage: %s [OPTS] IFACE\n\n"
"OPTS:\n"
" -S use skb-mode\n"
" -N enforce native mode\n",
@@ -102,7 +103,11 @@ int main(int argc, char **argv)
return 1;
}
- ifindex = strtoul(argv[optind], NULL, 0);
+ ifindex = if_nametoindex(argv[1]);
+ if (!ifindex) {
+ perror("if_nametoindex");
+ return 1;
+ }
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
prog_load_attr.file = filename;