From patchwork Tue May 5 20:27:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stanislav Fomichev X-Patchwork-Id: 1283926 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20161025 header.b=pg20+Huj; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49Grr86l3Cz9sRf for ; Wed, 6 May 2020 06:27:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729031AbgEEU1g (ORCPT ); Tue, 5 May 2020 16:27:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728737AbgEEU1f (ORCPT ); Tue, 5 May 2020 16:27:35 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 425FDC061A0F for ; Tue, 5 May 2020 13:27:35 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id z11so16506ybk.2 for ; Tue, 05 May 2020 13:27:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=PF2UNwaBV4cS3yGntc/6WHndMyzkDDK2J0DXhFZJR38=; b=pg20+Huj1tjaFXy41mXHOk3I8JYZphKaknoLb2DiA1l1srUBnLq/vlvoimTJhWd1x8 rk2299sFt1U987UoB/wze27xOrzmbvTtebsZFNY5vRHVtHlAMWzIvV2W12xGtI/CrdO4 4nd5YZ3rxbx/gwfnHev3o2rB92o0f8ljDc5Cau4vTykdy0cn+hZfxfmuX7Rtwr52w4Kj bc/xkW5faZl/kte3WyXC23g/Wbfsw5iZ5CP601YPBC4ft3gtux8v/eZ0+0HCIdGn1T6A kwqz3K7f71kMsGep2iw70/qk3FV4LoJFawkf8Kfrp02D2JyvjqbfhhisHBiB1ZxqkXP8 6V+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=PF2UNwaBV4cS3yGntc/6WHndMyzkDDK2J0DXhFZJR38=; b=JlV/ZRo8g8sYeeaukN86ZCkBb28+dfrRdZctGW4bddvCUFlnoMH0AVWqEMtWi/qZNw GsRdO41YLLMssNpprSRBfE4isLV3slcTt4qVlP1ZQssAqz7c2nEbn2t3qpzl0+8oDRqC ZFtVjOlrWRbMKrxOkp4y+WcsOt7Qe/FSCzEX2ZTC7QNY6uo3tuXb2a22sZTRwv6VHyNz dvBy90EF01vIGWAhMINbKFRq9OmYpa4wtdX46hhHju77Ud3uDZS9u0SLA4Re/Fuq2Gf2 xQtipdQXyUuvYwdNXq2pWMP/C/XbMg0hHD33u+xcUQBt88PQQTJ2erOIh/lhOJp5m6p5 1rtg== X-Gm-Message-State: AGi0PuZNKjIUE1NJ2vXteDFJqx4enK4KCNM3mgt3Q09WTw9aHFnxnu+M T9aFpntqdT53VBFu4vrcp8O0j9k= X-Google-Smtp-Source: APiQypKDU30H0Ue+HRU31j7Aev+F450p9N+4LmuRYpELcOrcNEDgXRazIcgvELL17+MjyRFYcRTgX5g= X-Received: by 2002:a25:b0c:: with SMTP id 12mr7528258ybl.247.1588710454486; Tue, 05 May 2020 13:27:34 -0700 (PDT) Date: Tue, 5 May 2020 13:27:26 -0700 In-Reply-To: <20200505202730.70489-1-sdf@google.com> Message-Id: <20200505202730.70489-2-sdf@google.com> Mime-Version: 1.0 References: <20200505202730.70489-1-sdf@google.com> X-Mailer: git-send-email 2.26.2.526.g744177e7f7-goog Subject: [PATCH bpf-next v2 1/5] selftests/bpf: generalize helpers to control background listener From: Stanislav Fomichev To: netdev@vger.kernel.org, bpf@vger.kernel.org Cc: davem@davemloft.net, ast@kernel.org, daniel@iogearbox.net, Stanislav Fomichev , Andrey Ignatov Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Move the following routines that let us start a background listener thread and connect to a server by fd to the test_prog: * start_server_thread - start background INADDR_ANY thread * stop_server_thread - stop the thread * connect_to_fd - connect to the server identified by fd These will be used in the next commit. Also, extend these helpers to support AF_INET6 and accept the family as an argument. v2: * put helpers into network_helpers.c (Andrii Nakryiko) Cc: Andrey Ignatov Signed-off-by: Stanislav Fomichev --- tools/testing/selftests/bpf/Makefile | 2 +- tools/testing/selftests/bpf/network_helpers.c | 164 ++++++++++++++++++ tools/testing/selftests/bpf/network_helpers.h | 11 ++ .../selftests/bpf/prog_tests/tcp_rtt.c | 116 +------------ 4 files changed, 180 insertions(+), 113 deletions(-) create mode 100644 tools/testing/selftests/bpf/network_helpers.c create mode 100644 tools/testing/selftests/bpf/network_helpers.h diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 3d942be23d09..8f25966b500b 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -354,7 +354,7 @@ endef TRUNNER_TESTS_DIR := prog_tests TRUNNER_BPF_PROGS_DIR := progs TRUNNER_EXTRA_SOURCES := test_progs.c cgroup_helpers.c trace_helpers.c \ - flow_dissector_load.h + network_helpers.c flow_dissector_load.h TRUNNER_EXTRA_FILES := $(OUTPUT)/urandom_read \ $(wildcard progs/btf_dump_test_case_*.c) TRUNNER_BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c new file mode 100644 index 000000000000..ee9386b033ed --- /dev/null +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "network_helpers.h" + +#define CHECK_FAIL(condition) ({ \ + int __ret = !!(condition); \ + int __save_errno = errno; \ + if (__ret) { \ + fprintf(stdout, "%s:FAIL:%d\n", __func__, __LINE__); \ + } \ + errno = __save_errno; \ + __ret; \ +}) + +#define clean_errno() (errno == 0 ? "None" : strerror(errno)) +#define log_err(MSG, ...) fprintf(stderr, "(%s:%d: errno: %s) " MSG "\n", \ + __FILE__, __LINE__, clean_errno(), ##__VA_ARGS__) + +static int start_server(int family) +{ + struct sockaddr_storage addr = {}; + socklen_t len; + int fd; + + if (family == AF_INET) { + struct sockaddr_in *sin = (void *)&addr; + + sin->sin_family = AF_INET; + len = sizeof(*sin); + } else { + struct sockaddr_in6 *sin6 = (void *)&addr; + + sin6->sin6_family = AF_INET6; + len = sizeof(*sin6); + } + + fd = socket(family, SOCK_STREAM | SOCK_NONBLOCK, 0); + if (fd < 0) { + log_err("Failed to create server socket"); + return -1; + } + + if (bind(fd, (const struct sockaddr *)&addr, len) < 0) { + log_err("Failed to bind socket"); + close(fd); + return -1; + } + + return fd; +} + +static pthread_mutex_t server_started_mtx = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t server_started = PTHREAD_COND_INITIALIZER; +static volatile bool server_done; +pthread_t server_tid; + +static void *server_thread(void *arg) +{ + struct sockaddr_storage addr; + socklen_t len = sizeof(addr); + int fd = *(int *)arg; + int client_fd; + int err; + + err = listen(fd, 1); + + pthread_mutex_lock(&server_started_mtx); + pthread_cond_signal(&server_started); + pthread_mutex_unlock(&server_started_mtx); + + if (CHECK_FAIL(err < 0)) { + perror("Failed to listed on socket"); + return ERR_PTR(err); + } + + while (true) { + client_fd = accept(fd, (struct sockaddr *)&addr, &len); + if (client_fd == -1 && errno == EAGAIN) { + usleep(50); + continue; + } + break; + } + if (CHECK_FAIL(client_fd < 0)) { + perror("Failed to accept client"); + return ERR_PTR(err); + } + + while (!server_done) + usleep(50); + + close(client_fd); + + return NULL; +} + +int start_server_thread(int family) +{ + int fd = start_server(family); + + if (fd < 0) + return -1; + + if (CHECK_FAIL(pthread_create(&server_tid, NULL, server_thread, + (void *)&fd))) + goto err; + + pthread_mutex_lock(&server_started_mtx); + pthread_cond_wait(&server_started, &server_started_mtx); + pthread_mutex_unlock(&server_started_mtx); + + return fd; +err: + close(fd); + return -1; +} + +void stop_server_thread(int fd) +{ + void *server_res; + + server_done = true; + CHECK_FAIL(pthread_join(server_tid, &server_res)); + CHECK_FAIL(IS_ERR(server_res)); + close(fd); +} + +int connect_to_fd(int family, int server_fd) +{ + struct sockaddr_storage addr; + socklen_t len = sizeof(addr); + int fd; + + fd = socket(family, SOCK_STREAM, 0); + if (fd < 0) { + log_err("Failed to create client socket"); + return -1; + } + + if (getsockname(server_fd, (struct sockaddr *)&addr, &len)) { + log_err("Failed to get server addr"); + goto out; + } + + if (connect(fd, (const struct sockaddr *)&addr, len) < 0) { + log_err("Fail to connect to server with family %d", family); + goto out; + } + + return fd; + +out: + close(fd); + return -1; +} diff --git a/tools/testing/selftests/bpf/network_helpers.h b/tools/testing/selftests/bpf/network_helpers.h new file mode 100644 index 000000000000..1f3942160287 --- /dev/null +++ b/tools/testing/selftests/bpf/network_helpers.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __NETWORK_HELPERS_H +#define __NETWORK_HELPERS_H +#include +#include + +int start_server_thread(int family); +void stop_server_thread(int fd); +int connect_to_fd(int family, int server_fd); + +#endif diff --git a/tools/testing/selftests/bpf/prog_tests/tcp_rtt.c b/tools/testing/selftests/bpf/prog_tests/tcp_rtt.c index e56b52ab41da..14bc0f3dc5c1 100644 --- a/tools/testing/selftests/bpf/prog_tests/tcp_rtt.c +++ b/tools/testing/selftests/bpf/prog_tests/tcp_rtt.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 #include #include "cgroup_helpers.h" +#include "network_helpers.h" struct tcp_rtt_storage { __u32 invoked; @@ -87,34 +88,6 @@ static int verify_sk(int map_fd, int client_fd, const char *msg, __u32 invoked, return err; } -static int connect_to_server(int server_fd) -{ - struct sockaddr_storage addr; - socklen_t len = sizeof(addr); - int fd; - - fd = socket(AF_INET, SOCK_STREAM, 0); - if (fd < 0) { - log_err("Failed to create client socket"); - return -1; - } - - if (getsockname(server_fd, (struct sockaddr *)&addr, &len)) { - log_err("Failed to get server addr"); - goto out; - } - - if (connect(fd, (const struct sockaddr *)&addr, len) < 0) { - log_err("Fail to connect to server"); - goto out; - } - - return fd; - -out: - close(fd); - return -1; -} static int run_test(int cgroup_fd, int server_fd) { @@ -145,7 +118,7 @@ static int run_test(int cgroup_fd, int server_fd) goto close_bpf_object; } - client_fd = connect_to_server(server_fd); + client_fd = connect_to_fd(AF_INET, server_fd); if (client_fd < 0) { err = -1; goto close_bpf_object; @@ -180,103 +153,22 @@ static int run_test(int cgroup_fd, int server_fd) return err; } -static int start_server(void) -{ - struct sockaddr_in addr = { - .sin_family = AF_INET, - .sin_addr.s_addr = htonl(INADDR_LOOPBACK), - }; - int fd; - - fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0); - if (fd < 0) { - log_err("Failed to create server socket"); - return -1; - } - - if (bind(fd, (const struct sockaddr *)&addr, sizeof(addr)) < 0) { - log_err("Failed to bind socket"); - close(fd); - return -1; - } - - return fd; -} - -static pthread_mutex_t server_started_mtx = PTHREAD_MUTEX_INITIALIZER; -static pthread_cond_t server_started = PTHREAD_COND_INITIALIZER; -static volatile bool server_done = false; - -static void *server_thread(void *arg) -{ - struct sockaddr_storage addr; - socklen_t len = sizeof(addr); - int fd = *(int *)arg; - int client_fd; - int err; - - err = listen(fd, 1); - - pthread_mutex_lock(&server_started_mtx); - pthread_cond_signal(&server_started); - pthread_mutex_unlock(&server_started_mtx); - - if (CHECK_FAIL(err < 0)) { - perror("Failed to listed on socket"); - return ERR_PTR(err); - } - - while (true) { - client_fd = accept(fd, (struct sockaddr *)&addr, &len); - if (client_fd == -1 && errno == EAGAIN) { - usleep(50); - continue; - } - break; - } - if (CHECK_FAIL(client_fd < 0)) { - perror("Failed to accept client"); - return ERR_PTR(err); - } - - while (!server_done) - usleep(50); - - close(client_fd); - - return NULL; -} - void test_tcp_rtt(void) { int server_fd, cgroup_fd; - pthread_t tid; - void *server_res; cgroup_fd = test__join_cgroup("/tcp_rtt"); if (CHECK_FAIL(cgroup_fd < 0)) return; - server_fd = start_server(); + server_fd = start_server_thread(AF_INET); if (CHECK_FAIL(server_fd < 0)) goto close_cgroup_fd; - if (CHECK_FAIL(pthread_create(&tid, NULL, server_thread, - (void *)&server_fd))) - goto close_server_fd; - - pthread_mutex_lock(&server_started_mtx); - pthread_cond_wait(&server_started, &server_started_mtx); - pthread_mutex_unlock(&server_started_mtx); - CHECK_FAIL(run_test(cgroup_fd, server_fd)); - server_done = true; - CHECK_FAIL(pthread_join(tid, &server_res)); - CHECK_FAIL(IS_ERR(server_res)); + stop_server_thread(server_fd); -close_server_fd: - close(server_fd); close_cgroup_fd: close(cgroup_fd); }