From patchwork Thu Mar 7 23:27:27 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yonghong Song X-Patchwork-Id: 13586353 X-Patchwork-Delegate: bpf@iogearbox.net Received: from 66-220-155-178.mail-mxout.facebook.com (66-220-155-178.mail-mxout.facebook.com [66.220.155.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CBB6C3EA93 for ; Thu, 7 Mar 2024 23:27:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=66.220.155.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709854055; cv=none; b=ktZNJeW5lwjTrFO78l89zCWdXN+szl7IewFHpfRB3wqS2Vh3BtpBjEQQMJh9e9a1UmPCKJbx/1SYvGjghDxIcIVTmBgFrD0I6G8FnJb8vTThlxQGvuZUnoY3TIcH0Y3GWZO3QtBMht9qBEP+lfZk9v04JC8BjXP6Qyf+qoW7Uww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709854055; c=relaxed/simple; bh=19hrDFfEwMHEoblFj8EvO8zaoWaDrVpKmPId0LbLoyg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H1QnoGKYR0IBdsZfkXfPnLy9KxAI2tGr9FkGJUqNSi/GdTlITLdVyzZFiNMxxmfy3PZoGSp6YMUKW2BRbjZLaP1tN+Ff2EhrYvd6y6CsXFvWIKQrUf7yuXDNLPZbFhQwgbrRpQ6H9ikikus9ES+JAIymAtR2uiAhhr0eUSbNJeU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.dev; spf=fail smtp.mailfrom=linux.dev; arc=none smtp.client-ip=66.220.155.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=linux.dev Received: by devbig309.ftw3.facebook.com (Postfix, from userid 128203) id 10413164A24B; Thu, 7 Mar 2024 15:27:27 -0800 (PST) From: Yonghong Song To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , John Fastabend , kernel-team@fb.com, Martin KaFai Lau , Yury Namgung Subject: [PATCH bpf-next 5/5] selftests/bpf: Add a sk_msg prog bpf_get_ns_current_pid_tgid() test Date: Thu, 7 Mar 2024 15:27:27 -0800 Message-ID: <20240307232727.1118156-1-yonghong.song@linux.dev> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240307232659.1115872-1-yonghong.song@linux.dev> References: <20240307232659.1115872-1-yonghong.song@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Add a sk_msg bpf program test where the program is running in a pid namespace. The test is successful: #165/4 ns_current_pid_tgid/new_ns_sk_msg:OK Signed-off-by: Yonghong Song --- .../bpf/prog_tests/ns_current_pid_tgid.c | 62 +++++++++++++++++++ .../bpf/progs/test_ns_current_pid_tgid.c | 14 +++++ 2 files changed, 76 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c b/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c index a307303e01ee..f5d48549738a 100644 --- a/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c +++ b/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c @@ -119,6 +119,66 @@ static int test_current_pid_tgid_cgrp(void *args) return ret; } +static int test_current_pid_tgid_sk_msg(void *args) +{ + int verdict, map, server_fd = -1, client_fd = -1; + struct test_ns_current_pid_tgid__bss *bss; + static const char send_msg[] = "message"; + struct test_ns_current_pid_tgid *skel; + int ret = -1, err, key = 0; + pid_t tgid, pid; + + skel = test_ns_current_pid_tgid__open(); + if (!ASSERT_OK_PTR(skel, "test_ns_current_pid_tgid__open")) + return ret; + + bpf_program__set_autoload(skel->progs.sk_msg, true); + + err = test_ns_current_pid_tgid__load(skel); + if (!ASSERT_OK(err, "test_ns_current_pid_tgid__load")) + goto cleanup; + + bss = skel->bss; + if (get_pid_tgid(&pid, &tgid, skel->bss)) + goto cleanup; + + verdict = bpf_program__fd(skel->progs.sk_msg); + map = bpf_map__fd(skel->maps.sock_map); + err = bpf_prog_attach(verdict, map, BPF_SK_MSG_VERDICT, 0); + if (!ASSERT_OK(err, "prog_attach")) + goto cleanup; + + server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0); + if (!ASSERT_GE(server_fd, 0, "start_server")) + goto cleanup; + + client_fd = connect_to_fd(server_fd, 0); + if (!ASSERT_GE(client_fd, 0, "connect_to_fd")) + goto cleanup; + + err = bpf_map_update_elem(map, &key, &client_fd, BPF_ANY); + if (!ASSERT_OK(err, "bpf_map_update_elem")) + goto cleanup; + + err = send(client_fd, send_msg, sizeof(send_msg), 0); + if (!ASSERT_EQ(err, sizeof(send_msg), "send(msg)")) + goto cleanup; + + if (!ASSERT_EQ(bss->user_pid, pid, "pid")) + goto cleanup; + if (!ASSERT_EQ(bss->user_tgid, tgid, "tgid")) + goto cleanup; + ret = 0; + +cleanup: + if (server_fd >= 0) + close(server_fd); + if (client_fd >= 0) + close(client_fd); + test_ns_current_pid_tgid__destroy(skel); + return ret; +} + static void test_ns_current_pid_tgid_new_ns(int (*fn)(void *), void *arg) { int wstatus; @@ -156,4 +216,6 @@ void serial_test_ns_current_pid_tgid(void) close(cgroup_fd); } } + if (test__start_subtest("new_ns_sk_msg")) + test_ns_current_pid_tgid_new_ns(test_current_pid_tgid_sk_msg, NULL); } diff --git a/tools/testing/selftests/bpf/progs/test_ns_current_pid_tgid.c b/tools/testing/selftests/bpf/progs/test_ns_current_pid_tgid.c index d0010e698f66..386315afad65 100644 --- a/tools/testing/selftests/bpf/progs/test_ns_current_pid_tgid.c +++ b/tools/testing/selftests/bpf/progs/test_ns_current_pid_tgid.c @@ -5,6 +5,13 @@ #include #include +struct { + __uint(type, BPF_MAP_TYPE_SOCKMAP); + __uint(max_entries, 2); + __type(key, __u32); + __type(value, __u32); +} sock_map SEC(".maps"); + __u64 user_pid = 0; __u64 user_tgid = 0; __u64 dev = 0; @@ -35,4 +42,11 @@ int cgroup_bind4(struct bpf_sock_addr *ctx) return 1; } +SEC("?sk_msg") +int sk_msg(struct sk_msg_md *msg) +{ + get_pid_tgid(); + return SK_PASS; +} + char _license[] SEC("license") = "GPL";