summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/bpf/prog_tests/cgroup1_hierarchy.c
blob: 74d6d7546f40fa85f1e1ff4fd6c835c63d441a6b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2023 Yafang Shao <laoar.shao@gmail.com> */

#include <sys/types.h>
#include <unistd.h>
#include <test_progs.h>
#include "cgroup_helpers.h"
#include "test_cgroup1_hierarchy.skel.h"

static void bpf_cgroup1(struct test_cgroup1_hierarchy *skel)
{
	struct bpf_link *lsm_link, *fentry_link;
	int err;

	/* Attach LSM prog first */
	lsm_link = bpf_program__attach_lsm(skel->progs.lsm_run);
	if (!ASSERT_OK_PTR(lsm_link, "lsm_attach"))
		return;

	/* LSM prog will be triggered when attaching fentry */
	fentry_link = bpf_program__attach_trace(skel->progs.fentry_run);
	ASSERT_NULL(fentry_link, "fentry_attach_fail");

	err = bpf_link__destroy(lsm_link);
	ASSERT_OK(err, "destroy_lsm");
}

static void bpf_cgroup1_sleepable(struct test_cgroup1_hierarchy *skel)
{
	struct bpf_link *lsm_link, *fentry_link;
	int err;

	/* Attach LSM prog first */
	lsm_link = bpf_program__attach_lsm(skel->progs.lsm_s_run);
	if (!ASSERT_OK_PTR(lsm_link, "lsm_attach"))
		return;

	/* LSM prog will be triggered when attaching fentry */
	fentry_link = bpf_program__attach_trace(skel->progs.fentry_run);
	ASSERT_NULL(fentry_link, "fentry_attach_fail");

	err = bpf_link__destroy(lsm_link);
	ASSERT_OK(err, "destroy_lsm");
}

static void bpf_cgroup1_invalid_id(struct test_cgroup1_hierarchy *skel)
{
	struct bpf_link *lsm_link, *fentry_link;
	int err;

	/* Attach LSM prog first */
	lsm_link = bpf_program__attach_lsm(skel->progs.lsm_run);
	if (!ASSERT_OK_PTR(lsm_link, "lsm_attach"))
		return;

	/* LSM prog will be triggered when attaching fentry */
	fentry_link = bpf_program__attach_trace(skel->progs.fentry_run);
	if (!ASSERT_OK_PTR(fentry_link, "fentry_attach_success"))
		goto cleanup;

	err = bpf_link__destroy(fentry_link);
	ASSERT_OK(err, "destroy_lsm");

cleanup:
	err = bpf_link__destroy(lsm_link);
	ASSERT_OK(err, "destroy_fentry");
}

void test_cgroup1_hierarchy(void)
{
	struct test_cgroup1_hierarchy *skel;
	__u64 current_cgid;
	int hid, err;

	skel = test_cgroup1_hierarchy__open();
	if (!ASSERT_OK_PTR(skel, "open"))
		return;

	skel->bss->target_pid = getpid();

	err = bpf_program__set_attach_target(skel->progs.fentry_run, 0, "bpf_fentry_test1");
	if (!ASSERT_OK(err, "fentry_set_target"))
		goto destroy;

	err = test_cgroup1_hierarchy__load(skel);
	if (!ASSERT_OK(err, "load"))
		goto destroy;

	/* Setup cgroup1 hierarchy */
	err = setup_classid_environment();
	if (!ASSERT_OK(err, "setup_classid_environment"))
		goto destroy;

	err = join_classid();
	if (!ASSERT_OK(err, "join_cgroup1"))
		goto cleanup;

	current_cgid = get_classid_cgroup_id();
	if (!ASSERT_GE(current_cgid, 0, "cgroup1 id"))
		goto cleanup;

	hid = get_cgroup1_hierarchy_id("net_cls");
	if (!ASSERT_GE(hid, 0, "cgroup1 id"))
		goto cleanup;
	skel->bss->target_hid = hid;

	if (test__start_subtest("test_cgroup1_hierarchy")) {
		skel->bss->target_ancestor_cgid = current_cgid;
		bpf_cgroup1(skel);
	}

	if (test__start_subtest("test_root_cgid")) {
		skel->bss->target_ancestor_cgid = 1;
		skel->bss->target_ancestor_level = 0;
		bpf_cgroup1(skel);
	}

	if (test__start_subtest("test_invalid_level")) {
		skel->bss->target_ancestor_cgid = 1;
		skel->bss->target_ancestor_level = 1;
		bpf_cgroup1_invalid_id(skel);
	}

	if (test__start_subtest("test_invalid_cgid")) {
		skel->bss->target_ancestor_cgid = 0;
		bpf_cgroup1_invalid_id(skel);
	}

	if (test__start_subtest("test_invalid_hid")) {
		skel->bss->target_ancestor_cgid = 1;
		skel->bss->target_ancestor_level = 0;
		skel->bss->target_hid = -1;
		bpf_cgroup1_invalid_id(skel);
	}

	if (test__start_subtest("test_invalid_cgrp_name")) {
		skel->bss->target_hid = get_cgroup1_hierarchy_id("net_cl");
		skel->bss->target_ancestor_cgid = current_cgid;
		bpf_cgroup1_invalid_id(skel);
	}

	if (test__start_subtest("test_invalid_cgrp_name2")) {
		skel->bss->target_hid = get_cgroup1_hierarchy_id("net_cls,");
		skel->bss->target_ancestor_cgid = current_cgid;
		bpf_cgroup1_invalid_id(skel);
	}

	if (test__start_subtest("test_sleepable_prog")) {
		skel->bss->target_hid = hid;
		skel->bss->target_ancestor_cgid = current_cgid;
		bpf_cgroup1_sleepable(skel);
	}

cleanup:
	cleanup_classid_environment();
destroy:
	test_cgroup1_hierarchy__destroy(skel);
}