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Commit dc378a1a authored by Matteo Croce's avatar Matteo Croce Committed by Alexei Starovoitov
Browse files

samples: bpf: get ifindex from ifname 



Find the ifindex with if_nametoindex() instead of requiring the
numeric ifindex.

Signed-off-by: default avatarMatteo Croce <mcroce@redhat.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent d606ee5c

samples/bpf/xdp1_user.c

+7 −2
Original line number Diff line number Diff line
@@ -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;