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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include <test_progs.h>
#include <sys/mman.h>
#include <sys/utsname.h>
#include <linux/version.h>
#include "test_core_extern.skel.h"
static uint32_t get_kernel_version(void)
{
uint32_t major, minor, patch;
struct utsname info;
uname(&info);
if (sscanf(info.release, "%u.%u.%u", &major, &minor, &patch) != 3)
return 0;
return KERNEL_VERSION(major, minor, patch);
}
#define CFG "CONFIG_BPF_SYSCALL=n\n"
static struct test_case {
const char *name;
const char *cfg;
const char *cfg_path;
bool fails;
struct test_core_extern__data data;
} test_cases[] = {
{ .name = "default search path", .cfg_path = NULL,
.data = { .bpf_syscall = true } },
{ .name = "/proc/config.gz", .cfg_path = "/proc/config.gz",
.data = { .bpf_syscall = true } },
{ .name = "missing config", .fails = true,
.cfg_path = "/proc/invalid-config.gz" },
{
.name = "custom values",
.cfg = "CONFIG_BPF_SYSCALL=y\n"
"CONFIG_TRISTATE=m\n"
"CONFIG_BOOL=y\n"
"CONFIG_CHAR=100\n"
"CONFIG_USHORT=30000\n"
"CONFIG_INT=123456\n"
"CONFIG_ULONG=0xDEADBEEFC0DE\n"
"CONFIG_STR=\"abracad\"\n"
"CONFIG_MISSING=0",
.data = {
.bpf_syscall = true,
.tristate_val = TRI_MODULE,
.bool_val = true,
.char_val = 100,
.ushort_val = 30000,
.int_val = 123456,
.ulong_val = 0xDEADBEEFC0DE,
.str_val = "abracad",
},
},
/* TRISTATE */
{ .name = "tristate (y)", .cfg = CFG"CONFIG_TRISTATE=y\n",
.data = { .tristate_val = TRI_YES } },
{ .name = "tristate (n)", .cfg = CFG"CONFIG_TRISTATE=n\n",
.data = { .tristate_val = TRI_NO } },
{ .name = "tristate (m)", .cfg = CFG"CONFIG_TRISTATE=m\n",
.data = { .tristate_val = TRI_MODULE } },
{ .name = "tristate (int)", .fails = 1, .cfg = CFG"CONFIG_TRISTATE=1" },
{ .name = "tristate (bad)", .fails = 1, .cfg = CFG"CONFIG_TRISTATE=M" },
/* BOOL */
{ .name = "bool (y)", .cfg = CFG"CONFIG_BOOL=y\n",
.data = { .bool_val = true } },
{ .name = "bool (n)", .cfg = CFG"CONFIG_BOOL=n\n",
.data = { .bool_val = false } },
{ .name = "bool (tristate)", .fails = 1, .cfg = CFG"CONFIG_BOOL=m" },
{ .name = "bool (int)", .fails = 1, .cfg = CFG"CONFIG_BOOL=1" },
/* CHAR */
{ .name = "char (tristate)", .cfg = CFG"CONFIG_CHAR=m\n",
.data = { .char_val = 'm' } },
{ .name = "char (bad)", .fails = 1, .cfg = CFG"CONFIG_CHAR=q\n" },
{ .name = "char (empty)", .fails = 1, .cfg = CFG"CONFIG_CHAR=\n" },
{ .name = "char (str)", .fails = 1, .cfg = CFG"CONFIG_CHAR=\"y\"\n" },
/* STRING */
{ .name = "str (empty)", .cfg = CFG"CONFIG_STR=\"\"\n",
.data = { .str_val = "\0\0\0\0\0\0\0" } },
{ .name = "str (padded)", .cfg = CFG"CONFIG_STR=\"abra\"\n",
.data = { .str_val = "abra\0\0\0" } },
{ .name = "str (too long)", .cfg = CFG"CONFIG_STR=\"abracada\"\n",
.data = { .str_val = "abracad" } },
{ .name = "str (no value)", .fails = 1, .cfg = CFG"CONFIG_STR=\n" },
{ .name = "str (bad value)", .fails = 1, .cfg = CFG"CONFIG_STR=bla\n" },
/* INTEGERS */
{
.name = "integer forms",
.cfg = CFG
"CONFIG_CHAR=0xA\n"
"CONFIG_USHORT=0462\n"
"CONFIG_INT=-100\n"
"CONFIG_ULONG=+1000000000000",
.data = {
.char_val = 0xA,
.ushort_val = 0462,
.int_val = -100,
.ulong_val = 1000000000000,
},
},
{ .name = "int (bad)", .fails = 1, .cfg = CFG"CONFIG_INT=abc" },
{ .name = "int (str)", .fails = 1, .cfg = CFG"CONFIG_INT=\"abc\"" },
{ .name = "int (empty)", .fails = 1, .cfg = CFG"CONFIG_INT=" },
{ .name = "int (mixed)", .fails = 1, .cfg = CFG"CONFIG_INT=123abc" },
{ .name = "int (max)", .cfg = CFG"CONFIG_INT=2147483647",
.data = { .int_val = 2147483647 } },
{ .name = "int (min)", .cfg = CFG"CONFIG_INT=-2147483648",
.data = { .int_val = -2147483648 } },
{ .name = "int (max+1)", .fails = 1, .cfg = CFG"CONFIG_INT=2147483648" },
{ .name = "int (min-1)", .fails = 1, .cfg = CFG"CONFIG_INT=-2147483649" },
{ .name = "ushort (max)", .cfg = CFG"CONFIG_USHORT=65535",
.data = { .ushort_val = 65535 } },
{ .name = "ushort (min)", .cfg = CFG"CONFIG_USHORT=0",
.data = { .ushort_val = 0 } },
{ .name = "ushort (max+1)", .fails = 1, .cfg = CFG"CONFIG_USHORT=65536" },
{ .name = "ushort (min-1)", .fails = 1, .cfg = CFG"CONFIG_USHORT=-1" },
{ .name = "u64 (max)", .cfg = CFG"CONFIG_ULONG=0xffffffffffffffff",
.data = { .ulong_val = 0xffffffffffffffff } },
{ .name = "u64 (min)", .cfg = CFG"CONFIG_ULONG=0",
.data = { .ulong_val = 0 } },
{ .name = "u64 (max+1)", .fails = 1, .cfg = CFG"CONFIG_ULONG=0x10000000000000000" },
};
BPF_EMBED_OBJ(core_extern, "test_core_extern.o");
void test_core_extern(void)
{
const uint32_t kern_ver = get_kernel_version();
int err, duration = 0, i, j;
struct test_core_extern *skel = NULL;
uint64_t *got, *exp;
int n = sizeof(*skel->data) / sizeof(uint64_t);
for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
char tmp_cfg_path[] = "/tmp/test_core_extern_cfg.XXXXXX";
struct test_case *t = &test_cases[i];
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
.kconfig_path = t->cfg_path,
);
if (!test__start_subtest(t->name))
continue;
if (t->cfg) {
size_t n = strlen(t->cfg) + 1;
int fd = mkstemp(tmp_cfg_path);
int written;
if (CHECK(fd < 0, "mkstemp", "errno: %d\n", errno))
continue;
printf("using '%s' as config file\n", tmp_cfg_path);
written = write(fd, t->cfg, n);
close(fd);
if (CHECK_FAIL(written != n))
goto cleanup;
opts.kconfig_path = tmp_cfg_path;
}
skel = test_core_extern__open_opts(&core_extern_embed, &opts);
if (CHECK(!skel, "skel_open", "skeleton open failed\n"))
goto cleanup;
err = test_core_extern__load(skel);
if (t->fails) {
CHECK(!err, "skel_load",
"shouldn't succeed open/load of skeleton\n");
goto cleanup;
} else if (CHECK(err, "skel_load",
"failed to open/load skeleton\n")) {
goto cleanup;
}
err = test_core_extern__attach(skel);
if (CHECK(err, "attach_raw_tp", "failed attach: %d\n", err))
goto cleanup;
usleep(1);
t->data.kern_ver = kern_ver;
t->data.missing_val = 0xDEADC0DE;
got = (uint64_t *)skel->data;
exp = (uint64_t *)&t->data;
for (j = 0; j < n; j++) {
CHECK(got[j] != exp[j], "check_res",
"result #%d: expected %lx, but got %lx\n",
j, exp[j], got[j]);
}
cleanup:
if (t->cfg)
unlink(tmp_cfg_path);
test_core_extern__destroy(skel);
skel = NULL;
}
}
|
