From patchwork Mon Feb 24 15:29:06 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcus Wichelmann X-Patchwork-Id: 867999 Received: from dediextern.your-server.de (dediextern.your-server.de [85.10.215.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9973E23BCEA; Mon, 24 Feb 2025 15:29:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=85.10.215.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740410984; cv=none; b=KYvb5poL7qQpeCMV+TcgJ4xS10NakK7Ns1bdmVGnvb0kkuAo1ELqXnNebOFl6N2dvtHJRRWNBPvuTF7SIboJmuGeSmBPa7wAy9nbg3yyVjDye2UgORCGrE60HcUEurXit4zFaBxe3vSwp5pywx3zxxc/uYpplWnS8zFymw+0DOY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740410984; c=relaxed/simple; bh=riH3QIs5pbvGJv1C6PfdADXMONR4L91TV2bzn26/NZM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KDajG7DBoT28U0OE6HWapEaGgQVo51pSKGWwvJ04fvUY7p4doWqEkvWvIQZdDqKgFt+2Hwv1CMDJTq7MQL3zVLMwL6y2UwYZrtFTb6BKsglVoTjC00FmzQUXbvZn1Et+U0D0NMrI4wKX9wZTO5QMsFDVh9gZc+X3Qy7wSvqlhFs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=hetzner-cloud.de; spf=pass smtp.mailfrom=hetzner-cloud.de; arc=none smtp.client-ip=85.10.215.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=hetzner-cloud.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=hetzner-cloud.de Received: from sslproxy01.your-server.de ([78.46.139.224]) by dediextern.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1tmaOQ-000A2D-TI; Mon, 24 Feb 2025 16:29:14 +0100 Received: from [78.47.5.107] (helo=sdn-nic-test01..) by sslproxy01.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tmaOQ-0005Hj-21; Mon, 24 Feb 2025 16:29:14 +0100 From: Marcus Wichelmann To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: willemdebruijn.kernel@gmail.com, jasowang@redhat.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, andrii@kernel.org, eddyz87@gmail.com, mykolal@fb.com, ast@kernel.org, daniel@iogearbox.net, martin.lau@linux.dev, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, shuah@kernel.org, hawk@kernel.org, marcus.wichelmann@hetzner-cloud.de Subject: [PATCH bpf-next v3 3/6] selftests/bpf: move open_tuntap to network helpers Date: Mon, 24 Feb 2025 15:29:06 +0000 Message-ID: <20250224152909.3911544-4-marcus.wichelmann@hetzner-cloud.de> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250224152909.3911544-1-marcus.wichelmann@hetzner-cloud.de> References: <20250224152909.3911544-1-marcus.wichelmann@hetzner-cloud.de> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Authenticated-Sender: marcus.wichelmann@hetzner-cloud.de X-Virus-Scanned: Clear (ClamAV 1.0.7/27559/Mon Feb 24 10:44:14 2025) To test the XDP metadata functionality of the tun driver, it's necessary to create a new tap device first. A helper function for this already exists in lwt_helpers.h. Move it to the common network helpers header, so it can be reused in other tests. Signed-off-by: Marcus Wichelmann --- tools/testing/selftests/bpf/network_helpers.c | 28 ++++++++++++++++++ tools/testing/selftests/bpf/network_helpers.h | 3 ++ .../selftests/bpf/prog_tests/lwt_helpers.h | 29 ------------------- 3 files changed, 31 insertions(+), 29 deletions(-) diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c index 737a952dcf80..e1cfa1b37754 100644 --- a/tools/testing/selftests/bpf/network_helpers.c +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -565,6 +565,34 @@ void close_netns(struct nstoken *token) free(token); } +int open_tuntap(const char *dev_name, bool need_mac) +{ + int err = 0; + struct ifreq ifr; + int fd = open("/dev/net/tun", O_RDWR); + + if (!ASSERT_GT(fd, 0, "open(/dev/net/tun)")) + return -1; + + ifr.ifr_flags = IFF_NO_PI | (need_mac ? IFF_TAP : IFF_TUN); + strncpy(ifr.ifr_name, dev_name, IFNAMSIZ - 1); + ifr.ifr_name[IFNAMSIZ - 1] = '\0'; + + err = ioctl(fd, TUNSETIFF, &ifr); + if (!ASSERT_OK(err, "ioctl(TUNSETIFF)")) { + close(fd); + return -1; + } + + err = fcntl(fd, F_SETFL, O_NONBLOCK); + if (!ASSERT_OK(err, "fcntl(O_NONBLOCK)")) { + close(fd); + return -1; + } + + return fd; +} + int get_socket_local_port(int sock_fd) { struct sockaddr_storage addr; diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h index 9f6e05d886c5..99d1417c1d8b 100644 --- a/tools/testing/selftests/bpf/network_helpers.h +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -8,6 +8,7 @@ typedef __u16 __sum16; #include #include +#include #include #include #include @@ -98,6 +99,8 @@ int send_recv_data(int lfd, int fd, uint32_t total_bytes); int make_netns(const char *name); int remove_netns(const char *name); +int open_tuntap(const char *dev_name, bool need_mac); + /** * append_tid() - Append thread ID to the given string. * diff --git a/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h b/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h index fb1eb8c67361..ccec0fcdabc1 100644 --- a/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h +++ b/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h @@ -5,7 +5,6 @@ #include #include -#include #include #include "test_progs.h" @@ -37,34 +36,6 @@ static inline int netns_delete(void) return system("ip netns del " NETNS ">/dev/null 2>&1"); } -static int open_tuntap(const char *dev_name, bool need_mac) -{ - int err = 0; - struct ifreq ifr; - int fd = open("/dev/net/tun", O_RDWR); - - if (!ASSERT_GT(fd, 0, "open(/dev/net/tun)")) - return -1; - - ifr.ifr_flags = IFF_NO_PI | (need_mac ? IFF_TAP : IFF_TUN); - strncpy(ifr.ifr_name, dev_name, IFNAMSIZ - 1); - ifr.ifr_name[IFNAMSIZ - 1] = '\0'; - - err = ioctl(fd, TUNSETIFF, &ifr); - if (!ASSERT_OK(err, "ioctl(TUNSETIFF)")) { - close(fd); - return -1; - } - - err = fcntl(fd, F_SETFL, O_NONBLOCK); - if (!ASSERT_OK(err, "fcntl(O_NONBLOCK)")) { - close(fd); - return -1; - } - - return fd; -} - #define ICMP_PAYLOAD_SIZE 100 /* Match an ICMP packet with payload len ICMP_PAYLOAD_SIZE */