From patchwork Wed Oct 9 09:45:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13828024 X-Patchwork-Delegate: matthieu.baerts@tessares.net Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4F19928EF for ; Wed, 9 Oct 2024 09:46:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728467180; cv=none; b=Sej1PtaZ/sWj3Aj1zeG+YwfhF3YW5n+9xHzU+EbHRqAwqzD874PbzgTbPR5JVhQ5vKPuJW3CCRClrAGQnZ6Vs7g3xixoQT00Ng2eYAmF6kgXvcUSaI1g4Di4NkOClw87wAEIMAvpuJvj4HxrFkfaNCl/DxRAbuU8k6fBNrd+P2g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728467180; c=relaxed/simple; bh=oumnZN7lfeBZipt/q7v7JY9vEXkhK5S+dRHfm39SAWA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RJ2bUp8LCfy5U39Xs/iJiS+xToM9Fqc/QWuFTBWQVg8mQWP4xW88cRr7GmQMTpQen6qXm1HE2Z08YfyHb5or/MUU8XSp3O7+DmCckSNv3xks87sxyeEBYYfI8cZXk8Y0j5aXR2Z11VgE9OKm0t3SFzCOAx0QhfxjugmiwBgTPUw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PzuKt8d6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PzuKt8d6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2564DC4CECF; Wed, 9 Oct 2024 09:46:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728467180; bh=oumnZN7lfeBZipt/q7v7JY9vEXkhK5S+dRHfm39SAWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PzuKt8d6P+GzuDXkrZiA0jEI6QjY1UzAn42P5ZD08aMJZi4Qconwh2T5KzZujrwQy yZd3FfjrTyvjH/NvPuPfW5eCpiA+RIU+D2JeR331/EUYJGeFtYN1H13yyKrsHSWmsY Ti683E5J+s5dPwdU6IiK9GraaxS8ZIBuIcWde0m/25j/kGpetxEVibxJCJLhuWshHX iJSZmoPrQ9UkVZz6ELfQ/PGuDOa4iNM6cJBDTluqlDGRCTVP19mV5cwk9La2BTvKex 5xLbu9VzclVZbqjZ2HnqzpLmUqfxMkOD22ciyb/EUF4JH9lrmpq2z6YxWC4kpN9SaO bf5u1IFOah3qA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v9 7/7] selftests/bpf: Add mptcp_subflow bpf_iter subtest Date: Wed, 9 Oct 2024 17:45:49 +0800 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Geliang Tang This patch adds a subtest named test_iters_subflow to load and verify the newly added mptcp_subflow type bpf_iter example in test_mptcp. Use the helper endpoint_init() to add 3 new subflow endpoints. Send a byte of message to start the mptcp connection, a new helper recv_byte() is added to receive this message. send_byte() is invoked again to trigger the ftrace hook for mptcp_sched_get_send() after wait_for_new_subflows(). Check if skel->bss->subflows equals 4 to verify whether the "fentry" program loops fourth as expected. Signed-off-by: Geliang Tang --- .../testing/selftests/bpf/prog_tests/mptcp.c | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index 64b5ce25e1a1..589420f42845 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -11,6 +11,7 @@ #include "mptcp_sock.skel.h" #include "mptcpify.skel.h" #include "mptcp_subflow.skel.h" +#include "mptcp_bpf_iters_subflow.skel.h" #include "mptcp_bpf_first.skel.h" #include "mptcp_bpf_bkup.skel.h" #include "mptcp_bpf_rr.skel.h" @@ -261,6 +262,19 @@ static void send_byte(int fd) ASSERT_EQ(write(fd, &b, sizeof(b)), 1, "send single byte"); } +static int recv_byte(int fd) +{ + char buf[1]; + ssize_t n; + + n = recv(fd, buf, sizeof(buf), 0); + if (CHECK(n <= 0, "recv_byte", "recv")) { + log_err("failed/partial recv"); + return -1; + } + return 0; +} + static int verify_mptcpify(int server_fd, int client_fd) { struct __mptcp_info info; @@ -501,6 +515,68 @@ static void test_subflow(void) close(cgroup_fd); } +static void run_iters_subflow(void) +{ + int server_fd, client_fd, accept_fd; + + server_fd = start_mptcp_server(AF_INET, ADDR_1, PORT_1, 0); + if (!ASSERT_OK_FD(server_fd, "start_mptcp_server")) + return; + + client_fd = connect_to_fd(server_fd, 0); + if (!ASSERT_OK_FD(client_fd, "connect_to_fd")) + goto close_server; + + accept_fd = accept(server_fd, NULL, NULL); + if (!ASSERT_OK_FD(accept_fd, "accept")) + goto close_client; + + send_byte(client_fd); + wait_for_new_subflows(client_fd); + recv_byte(accept_fd); + send_byte(client_fd); + + close(accept_fd); +close_client: + close(client_fd); +close_server: + close(server_fd); +} + +static void test_iters_subflow(void) +{ + struct mptcp_bpf_iters_subflow *skel; + struct nstoken *nstoken; + int subflows = 4; + int err; + + skel = mptcp_bpf_iters_subflow__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_open_load: iters_subflow")) + return; + + skel->bss->pid = getpid(); + + err = mptcp_bpf_iters_subflow__attach(skel); + if (!ASSERT_OK(err, "skel_attach: iters_subflow")) + goto skel_destroy; + + nstoken = create_netns(); + if (!ASSERT_OK_PTR(nstoken, "create_netns: iters_subflow")) + goto skel_destroy; + + if (endpoint_init("subflow", subflows) < 0) + goto close_netns; + + run_iters_subflow(); + + ASSERT_EQ(skel->bss->subflows, subflows, "subflows"); + +close_netns: + cleanup_netns(nstoken); +skel_destroy: + mptcp_bpf_iters_subflow__destroy(skel); +} + static struct nstoken *sched_init(char *flags, char *sched) { struct nstoken *nstoken; @@ -682,6 +758,8 @@ void test_mptcp(void) test_mptcpify(); if (test__start_subtest("subflow")) test_subflow(); + if (test__start_subtest("iters_subflow")) + test_iters_subflow(); if (test__start_subtest("default")) test_default(); if (test__start_subtest("first"))