From patchwork Tue Oct 22 09:14:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geliang Tang X-Patchwork-Id: 13845408 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 BEBBD1957FC for ; Tue, 22 Oct 2024 09:15:49 +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=1729588549; cv=none; b=o+dKvLrcFaWcb8M5ASvWN+hRMTt5p1qhYcym5YA/xfqyqm9PONdYFRxZnG8hK459bR5YTZVdN9byHhl9rTgUEs6CH9xF9qYAlSG186OyA9Kr0pWDDH5hprYi8JCTpK8cGYo90qoh5IjkGnlzOl48+xIuhdmipIWrYeg+f2cx/xg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729588549; c=relaxed/simple; bh=LioRyH8CdYpUVC3HSONHAXUYzQE06SDLizYFC/Q0WOA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZJgCt2kDgMqEPaJLA1qRZPMOxZ7NyjAEIIoIKVUqsrbzwQdPJNli+u82j5G7o94YeT1cbesqfNjD1R54p0M88kSWaFWNnSUpak/B2UWlJrwLnDx9fZ2B5KvxIKu5B+g3Vt+jWTKHFrn7/EYWRPU656i4Z3dbJDsOGEqYWW0uEHE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AO9F/AEO; 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="AO9F/AEO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3841C4AF0B; Tue, 22 Oct 2024 09:15:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729588549; bh=LioRyH8CdYpUVC3HSONHAXUYzQE06SDLizYFC/Q0WOA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AO9F/AEOApUw7Odq7Mp2pLqZsI7uk/YJd3yQ4bpB6KGtDfCsMq2e3vHTZ1K9wPzqw ZVcPX8C7V3+K9DWi2wNEfx+f3kZnyIz6XZ9a7snmr0B6VM0FlVfnd9+1I6id3sQuac Kq6zpAZA+PQLZNnk0nubeDN+wjDwlI6QDhfoPHk4fDkKHmUdou/1plXppmdlItPUlm O+D5oZHwT8pi7zwrXkN0YgtUI3yuJjyj2y2ZUEVTohV9C5a/EnhA3ZmdItGz9n+Fb8 lCwXg1YCKIHwvuqF8Rrk8rZhkmihxbMxicBJ5hPm5F0S1es545dm6zGaZkYKxQPRWE da716p+mamHYA== From: Geliang Tang To: mptcp@lists.linux.dev Cc: Geliang Tang Subject: [PATCH mptcp-next v2 35/36] selftests/bpf: Add mptcp userspace pm subtest Date: Tue, 22 Oct 2024 17:14:43 +0800 Message-ID: <17c3d24db37a40a78342240e93758d2c949dee05.1729588019.git.tanggeliang@kylinos.cn> X-Mailer: git-send-email 2.45.2 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 To verify that the behavior of BPF path manager is the same as that of userspace pm in the kernel, a userspace pm self-test has been added. BPF path manager in the next commit will also use this test. Signed-off-by: Geliang Tang --- .../testing/selftests/bpf/prog_tests/mptcp.c | 244 ++++++++++++++++++ 1 file changed, 244 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index 73bfd177dc04..2e8f4e458430 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -66,6 +66,12 @@ enum mptcp_pm_type { __MPTCP_PM_TYPE_MAX = __MPTCP_PM_TYPE_NR - 1, }; +enum mptcp_pm_family { + IPV4 = 0, + IPV6, + IPV4MAPPED, +}; + static const unsigned int total_bytes = 10 * 1024 * 1024; static int duration; @@ -797,6 +803,242 @@ static void test_iters_address(void) close(cgroup_fd); } +static int userspace_pm_add_addr(__u32 token, char *addr, __u8 id) +{ + return SYS_NOFAIL("ip netns exec %s %s ann %s id %u token %u", + NS_TEST, PM_CTL, addr, id, token); +} + +static int userspace_pm_get_addr(__u32 token, __u8 id, char *output) +{ + char cmd[1024]; + FILE *fp; + + sprintf(cmd, "ip netns exec %s %s get %u token %u", + NS_TEST, PM_CTL, id, token); + fp = popen(cmd, "r"); + if (!fp) + return -1; + + bzero(output, BUFSIZ); + fread(output, 1, BUFSIZ, fp); + pclose(fp); + + return 0; +} + +static int userspace_pm_dump_addr(__u32 token, char *output) +{ + char cmd[1024]; + FILE *fp; + + sprintf(cmd, "ip netns exec %s %s dump token %u", + NS_TEST, PM_CTL, token); + fp = popen(cmd, "r"); + if (!fp) + return -1; + + bzero(output, BUFSIZ); + fread(output, 1, BUFSIZ, fp); + pclose(fp); + + return 0; +} + +static int userspace_pm_set_flags(__u32 token, char *addr, char *flags) +{ + bool ipv6 = strstr(addr, ":"); + char line[1024], *str; + __u32 sport, dport; + + if (userspace_pm_get_events_line("type:10", line)) + return -1; + + str = strstr(line, "sport"); + if (!str || sscanf(str, "sport:%u,dport:%u,", &sport, &dport) != 2) { + log_err("set_flags error, str=%s\n", str); + return -1; + } + + str = ipv6 ? (strstr(addr, ".") ? "::ffff:"ADDR_1 : ADDR6_1) : ADDR_1; + return SYS_NOFAIL("ip netns exec %s %s set %s port %u rip %s rport %u flags %s token %u", + NS_TEST, PM_CTL, addr, sport, str, dport, flags, token); +} + +static int userspace_pm_rm_subflow(__u32 token, char *addr, __u8 id) +{ + bool ipv6 = strstr(addr, ":"); + char line[1024], *str; + __u32 sport, dport; + + if (userspace_pm_get_events_line("type:10", line)) + return -1; + + str = strstr(line, "sport"); + if (!str || sscanf(str, "sport:%u,dport:%u,", &sport, &dport) != 2) { + log_err("rm_subflow error, str=%s\n", str); + return -1; + } + + str = ipv6 ? (strstr(addr, ".") ? "::ffff:"ADDR_1 : ADDR6_1) : ADDR_1; + return SYS_NOFAIL("ip netns exec %s %s dsf lip %s lport %u rip %s rport %u token %u", + NS_TEST, PM_CTL, addr, sport, str, dport, token); +} + +static int userspace_pm_rm_addr(__u32 token, __u8 id) +{ + return SYS_NOFAIL("ip netns exec %s %s rem id %u token %u", + NS_TEST, PM_CTL, id, token); +} + +static void run_userspace_pm(enum mptcp_pm_family family) +{ + bool ipv6 = (family == IPV6 || family == IPV4MAPPED); + bool ipv4mapped = (family == IPV4MAPPED); + int server_fd, client_fd, accept_fd; + char output[BUFSIZ], expect[1024]; + __u32 token; + char *addr; + int err; + + addr = ipv6 ? (ipv4mapped ? "::ffff:"ADDR_1 : ADDR6_1) : ADDR_1; + server_fd = start_mptcp_server(ipv6 ? AF_INET6 : AF_INET, addr, 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; + + token = userspace_pm_get_token(client_fd); + if (!token) + goto close_client; + recv_byte(accept_fd); + usleep(200000); /* 0.2s */ + + addr = ipv6 ? (ipv4mapped ? "::ffff:"ADDR_2 : ADDR6_2) : ADDR_2; + err = userspace_pm_add_subflow(token, addr, 100); + if (!ASSERT_OK(err, "userspace_pm_add_subflow 100")) + goto close_accept; + + send_byte(accept_fd); + recv_byte(client_fd); + + sprintf(expect, "id 100 flags subflow %s\n", addr); + err = userspace_pm_get_addr(token, 100, output); + if (!ASSERT_OK(err, "userspace_pm_get_addr 100") || + !ASSERT_STRNEQ(output, expect, sizeof(expect), "get_addr")) + goto close_accept; + + send_byte(client_fd); + recv_byte(accept_fd); + + err = userspace_pm_set_flags(token, addr, "backup"); + if (!ASSERT_OK(err, "userspace_pm_set_flags backup")) + goto close_accept; + + send_byte(accept_fd); + recv_byte(client_fd); + + sprintf(expect, "id 100 flags subflow,backup %s\n", addr); + err = userspace_pm_get_addr(token, 100, output); + if (!ASSERT_OK(err, "userspace_pm_get_addr 100") || + !ASSERT_STRNEQ(output, expect, sizeof(expect), "get_addr")) + goto close_accept; + + send_byte(client_fd); + recv_byte(accept_fd); + + err = userspace_pm_set_flags(token, addr, "nobackup"); + if (!ASSERT_OK(err, "userspace_pm_set_flags nobackup")) + goto close_accept; + + send_byte(accept_fd); + recv_byte(client_fd); + + sprintf(expect, "id 100 flags subflow %s\n", addr); + err = userspace_pm_get_addr(token, 100, output); + if (!ASSERT_OK(err, "userspace_pm_get_addr 100") || + !ASSERT_STRNEQ(output, expect, sizeof(expect), "get_addr")) + goto close_accept; + + send_byte(client_fd); + recv_byte(accept_fd); + + err = userspace_pm_rm_subflow(token, addr, 100); + if (!ASSERT_OK(err, "userspace_pm_rm_subflow 100")) + goto close_accept; + + send_byte(accept_fd); + recv_byte(client_fd); + + err = userspace_pm_dump_addr(token, output); + if (!ASSERT_OK(err, "userspace_pm_dump_addr") || + !ASSERT_STRNEQ(output, "", sizeof(output), "dump_addr")) + goto close_accept; + + send_byte(client_fd); + recv_byte(accept_fd); + + addr = ipv6 ? (ipv4mapped ? "::ffff:"ADDR_3 : ADDR6_3) : ADDR_3; + err = userspace_pm_add_addr(token, addr, 200); + if (!ASSERT_OK(err, "userspace_pm_add_addr 200")) + goto close_accept; + + send_byte(accept_fd); + recv_byte(client_fd); + + sprintf(expect, "id 200 flags signal %s\n", addr); + err = userspace_pm_dump_addr(token, output); + if (!ASSERT_OK(err, "userspace_pm_dump_addr") || + !ASSERT_STRNEQ(output, expect, sizeof(expect), "dump_addr")) + goto close_accept; + + send_byte(client_fd); + recv_byte(accept_fd); + + err = userspace_pm_rm_addr(token, 200); + if (!ASSERT_OK(err, "userspace_pm_rm_addr 200")) + goto close_accept; + + send_byte(accept_fd); + recv_byte(client_fd); + + err = userspace_pm_rm_addr(token, 0); + ASSERT_OK(err, "userspace_pm_rm_addr 0"); + +close_accept: + close(accept_fd); +close_client: + close(client_fd); +close_server: + close(server_fd); +} + +static void test_userspace_pm(void) +{ + struct nstoken *nstoken; + int err; + + nstoken = create_netns(); + if (!ASSERT_OK_PTR(nstoken, "create_netns")) + return; + + err = userspace_pm_init(MPTCP_PM_TYPE_USERSPACE); + if (!ASSERT_OK(err, "userspace_pm_init: userspace pm")) + goto fail; + + run_userspace_pm(IPV4); + + userspace_pm_cleanup(); +fail: + cleanup_netns(nstoken); +} + static struct nstoken *sched_init(char *flags, char *sched) { struct nstoken *nstoken; @@ -982,6 +1224,8 @@ void test_mptcp(void) test_iters_subflow(); if (test__start_subtest("iters_address")) test_iters_address(); + if (test__start_subtest("userspace_pm")) + test_userspace_pm(); if (test__start_subtest("default")) test_default(); if (test__start_subtest("first"))