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core_extern.c
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core_extern.c
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// 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;
bool fails;
struct test_core_extern__data data;
} test_cases[] = {
{ .name = "default search path", .data = { .bpf_syscall = true } },
{
.name = "custom values",
.cfg = "CONFIG_BPF_SYSCALL=n\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 = false,
.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" },
};
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++) {
struct test_case *t = &test_cases[i];
DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
.kconfig = t->cfg,
);
if (!test__start_subtest(t->name))
continue;
skel = test_core_extern__open_opts(&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 %llx, but got %llx\n",
j, (__u64)exp[j], (__u64)got[j]);
}
cleanup:
test_core_extern__destroy(skel);
skel = NULL;
}
}