From: Yonghong Song <yonghong.song@linux.dev>
To: bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
John Fastabend <john.fastabend@gmail.com>,
kernel-team@fb.com, Martin KaFai Lau <martin.lau@kernel.org>,
Yury Namgung <ynamgung@meta.com>
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 [thread overview]
Message-ID: <20240307232727.1118156-1-yonghong.song@linux.dev> (raw)
In-Reply-To: <20240307232659.1115872-1-yonghong.song@linux.dev>
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 <yonghong.song@linux.dev>
---
.../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 <stdint.h>
#include <bpf/bpf_helpers.h>
+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";
--
2.43.0
prev parent reply other threads:[~2024-03-07 23:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-07 23:26 [PATCH bpf-next 0/5] bpf: Allow helper bpf_get_ns_current_pid_tgid() in cgroup/sk_msg programs Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 1/5] bpf: Allow helper bpf_get_ns_current_pid_tgid() in cgroup and sk_msg programs Yonghong Song
2024-03-09 1:06 ` Andrii Nakryiko
2024-03-09 18:39 ` Yonghong Song
2024-03-09 19:10 ` Alexei Starovoitov
2024-03-09 21:03 ` Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 2/5] selftests/bpf: Replace CHECK with ASSERT_* in ns_current_pid_tgid test Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 3/5] selftests/bpf: Refactor out some functions " Yonghong Song
2024-03-07 23:27 ` [PATCH bpf-next 4/5] selftests/bpf: Add a cgroup prog bpf_get_ns_current_pid_tgid() test Yonghong Song
2024-03-08 19:08 ` Martin KaFai Lau
2024-03-09 0:04 ` Yonghong Song
2024-03-07 23:27 ` Yonghong Song [this message]
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