linux-kernel - Re: [PATCH bpf-next v2 1/4] selftests/bpf: convert get_current_cgroup_id_user to test

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Message-ID: <f1ca9d19-ccbb-48c2-b834-b9f53209f348@linux.dev>
Date: Fri, 9 Aug 2024 16:23:16 -0700
From: Martin KaFai Lau <martin.lau@...ux.dev>
To: Alexis Lothoré (eBPF Foundation)
 <alexis.lothore@...tlin.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
 Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>,
 John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>,
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>,
 Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko <mykolal@...com>,
 Shuah Khan <shuah@...nel.org>, ebpf@...uxfoundation.org,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
 linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
 linux-kselftest@...r.kernel.org
Subject: Re: [PATCH bpf-next v2 1/4] selftests/bpf: convert
 get_current_cgroup_id_user to test_progs

On 8/6/24 12:55 AM, Alexis Lothoré (eBPF Foundation) wrote:
> +void test_cgroup_get_current_cgroup_id(void)
> +{
> +	struct get_cgroup_id_kern *skel;
> +	const struct timespec req = {
> +		.tv_sec = 0,
> +		.tv_nsec = 1,
> +	};
> +	int cgroup_fd;
> +	__u64 ucgid;
> +
> +	cgroup_fd = cgroup_setup_and_join(TEST_CGROUP);

missing close(cgroup_fd)

pw-bot: cr

> +	if (!ASSERT_OK_FD(cgroup_fd, "cgroup switch"))
> +		return;
> +
> +	skel = get_cgroup_id_kern__open_and_load();
> +	if (!ASSERT_OK_PTR(skel, "load program"))
> +		goto cleanup_cgroup;
> +
> +	if (!ASSERT_OK(get_cgroup_id_kern__attach(skel), "attach bpf program"))
> +		goto cleanup_progs;
> +
> +	skel->bss->expected_pid = getpid();
> +	/* trigger the syscall on which is attached the tested prog */
> +	if (!ASSERT_OK(syscall(__NR_nanosleep, &req, NULL), "nanosleep"))
> +		goto cleanup_progs;
> +
> +	ucgid = get_cgroup_id(TEST_CGROUP);
> +
> +	ASSERT_EQ(skel->bss->cg_id, ucgid, "compare cgroup ids");
> +
> +cleanup_progs:
> +	get_cgroup_id_kern__destroy(skel);
> +cleanup_cgroup:
> +	cleanup_cgroup_environment();
> +}