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Tsirkin" , Jason Wang , Xuan Zhuo , Andrew Lunn , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , "David S. Miller" , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, Bui Quang Minh Subject: [PATCH v5 2/3] selftests: net: add flag to force zerocopy mode in xdp_helper Date: Thu, 24 Apr 2025 17:47:15 +0700 Message-ID: <20250424104716.40453-3-minhquangbui99@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250424104716.40453-1-minhquangbui99@gmail.com> References: <20250424104716.40453-1-minhquangbui99@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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: Bui Quang Minh --- tools/testing/selftests/net/lib/xdp_helper.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/lib/xdp_helper.c b/tools/testing/s= elftests/net/lib/xdp_helper.c index aeed25914104..f21536ab95ba 100644 --- a/tools/testing/selftests/net/lib/xdp_helper.c +++ b/tools/testing/selftests/net/lib/xdp_helper.c @@ -62,6 +62,12 @@ static void ksft_wait(void) close(fd); } =20 +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. * @@ -81,8 +87,8 @@ int main(int argc, char **argv) int sock_fd; int queue; =20 - if (argc !=3D 3) { - fprintf(stderr, "Usage: %s ifindex queue_id\n", argv[0]); + if (argc !=3D 3 && argc !=3D 4) { + print_usage(argv[0]); return 1; } =20 @@ -132,6 +138,15 @@ int main(int argc, char **argv) sxdp.sxdp_queue_id =3D queue; sxdp.sxdp_flags =3D 0; =20 + if (argc > 3) { + if (!strcmp(argv[3], "-z")) { + sxdp.sxdp_flags =3D XDP_ZEROCOPY; + } else { + print_usage(argv[0]); + return 1; + } + } + if (bind(sock_fd, (struct sockaddr *)&sxdp, sizeof(sxdp)) !=3D 0) { munmap(umem_area, UMEM_SZ); perror("bind failed"); --=20 2.43.0