Commit 5d346179 authored by Bui Quang Minh's avatar Bui Quang Minh Committed by Jakub Kicinski
Browse files

selftests: net: add flag to force zerocopy mode in xdp_helper 



This commit adds an optional -z flag to xdp_helper. When this flag is
provided, the XDP socket binding is forced to be in zerocopy mode.

Signed-off-by: default avatarBui Quang Minh <minhquangbui99@gmail.com>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Link: https://patch.msgid.link/20250425071018.36078-3-minhquangbui99@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 59dd07db

tools/testing/selftests/net/lib/xdp_helper.c

+17 −2
Original line number Diff line number Diff line
@@ -17,6 +17,12 @@ 
#define NUM_DESC (UMEM_SZ / 2048)





static void print_usage(const char *bin)

{

	fprintf(stderr, "Usage: %s ifindex queue_id [-z]\n\n"

		"where:\n\t-z: force zerocopy mode", bin);

}



/* this is a simple helper program that creates an XDP socket and does the

 * minimum necessary to get bind() to succeed.

 *
@@ -36,8 +42,8 @@ int main(int argc, char **argv) 
	int sock_fd;

	int queue;



	if (argc != 3) {

		fprintf(stderr, "Usage: %s ifindex queue_id\n", argv[0]);

	if (argc != 3 && argc != 4) {

		print_usage(argv[0]);

		return 1;

	}
@@ -87,6 +93,15 @@ int main(int argc, char **argv) 
	sxdp.sxdp_queue_id = queue;

	sxdp.sxdp_flags = 0;



	if (argc > 3) {

		if (!strcmp(argv[3], "-z")) {

			sxdp.sxdp_flags = XDP_ZEROCOPY;

		} else {

			print_usage(argv[0]);

			return 1;

		}

	}



	if (bind(sock_fd, (struct sockaddr *)&sxdp, sizeof(sxdp)) != 0) {

		munmap(umem_area, UMEM_SZ);

		perror("bind failed");