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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 v4 3/4] selftests: net: add flag to force zerocopy mode in xdp_helper Date: Thu, 17 Apr 2025 14:28:05 +0700 Message-ID: <20250417072806.18660-4-minhquangbui99@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250417072806.18660-1-minhquangbui99@gmail.com> References: <20250417072806.18660-1-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: 8bit 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 | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/lib/xdp_helper.c b/tools/testing/selftests/net/lib/xdp_helper.c index aeed25914104..6afd77bfbe8b 100644 --- a/tools/testing/selftests/net/lib/xdp_helper.c +++ b/tools/testing/selftests/net/lib/xdp_helper.c @@ -81,8 +81,9 @@ 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) { + fprintf(stderr, "Usage: %s ifindex queue_id [-z]\n\n" + "where:\n\t-z: force zerocopy mode", argv[0]); return 1; } @@ -132,6 +133,14 @@ int main(int argc, char **argv) sxdp.sxdp_queue_id = queue; sxdp.sxdp_flags = 0; + if (argc == 4 && strcmp(argv[3], "-z")) { + fprintf(stderr, "Usage: %s ifindex queue_id [-z]\n\n" + "where:\n\t-z: force zerocopy mode\n", argv[0]); + return 1; + } else if (argc == 4) { + sxdp.sxdp_flags = XDP_ZEROCOPY; + } + if (bind(sock_fd, (struct sockaddr *)&sxdp, sizeof(sxdp)) != 0) { munmap(umem_area, UMEM_SZ); perror("bind failed"); -- 2.43.0