// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2019 Facebook */
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#include <test_progs.h>
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#include <sys/mman.h>
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#include <sys/utsname.h>
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#include <linux/version.h>
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#include "test_core_extern.skel.h"
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static uint32_t get_kernel_version(void)
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{
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uint32_t major, minor, patch;
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struct utsname info;
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uname(&info);
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if (sscanf(info.release, "%u.%u.%u", &major, &minor, &patch) != 3)
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return 0;
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return KERNEL_VERSION(major, minor, patch);
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}
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#define CFG "CONFIG_BPF_SYSCALL=n\n"
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static struct test_case {
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const char *name;
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const char *cfg;
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bool fails;
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struct test_core_extern__data data;
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} test_cases[] = {
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{ .name = "default search path", .data = { .bpf_syscall = true } },
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{
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.name = "custom values",
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.cfg = "CONFIG_BPF_SYSCALL=n\n"
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"CONFIG_TRISTATE=m\n"
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"CONFIG_BOOL=y\n"
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"CONFIG_CHAR=100\n"
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"CONFIG_USHORT=30000\n"
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"CONFIG_INT=123456\n"
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"CONFIG_ULONG=0xDEADBEEFC0DE\n"
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"CONFIG_STR=\"abracad\"\n"
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"CONFIG_MISSING=0",
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.data = {
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.bpf_syscall = false,
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.tristate_val = TRI_MODULE,
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.bool_val = true,
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.char_val = 100,
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.ushort_val = 30000,
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.int_val = 123456,
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.ulong_val = 0xDEADBEEFC0DE,
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.str_val = "abracad",
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},
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},
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/* TRISTATE */
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{ .name = "tristate (y)", .cfg = CFG"CONFIG_TRISTATE=y\n",
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.data = { .tristate_val = TRI_YES } },
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{ .name = "tristate (n)", .cfg = CFG"CONFIG_TRISTATE=n\n",
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.data = { .tristate_val = TRI_NO } },
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{ .name = "tristate (m)", .cfg = CFG"CONFIG_TRISTATE=m\n",
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.data = { .tristate_val = TRI_MODULE } },
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{ .name = "tristate (int)", .fails = 1, .cfg = CFG"CONFIG_TRISTATE=1" },
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{ .name = "tristate (bad)", .fails = 1, .cfg = CFG"CONFIG_TRISTATE=M" },
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/* BOOL */
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{ .name = "bool (y)", .cfg = CFG"CONFIG_BOOL=y\n",
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.data = { .bool_val = true } },
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{ .name = "bool (n)", .cfg = CFG"CONFIG_BOOL=n\n",
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.data = { .bool_val = false } },
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{ .name = "bool (tristate)", .fails = 1, .cfg = CFG"CONFIG_BOOL=m" },
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{ .name = "bool (int)", .fails = 1, .cfg = CFG"CONFIG_BOOL=1" },
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/* CHAR */
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{ .name = "char (tristate)", .cfg = CFG"CONFIG_CHAR=m\n",
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.data = { .char_val = 'm' } },
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{ .name = "char (bad)", .fails = 1, .cfg = CFG"CONFIG_CHAR=q\n" },
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{ .name = "char (empty)", .fails = 1, .cfg = CFG"CONFIG_CHAR=\n" },
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{ .name = "char (str)", .fails = 1, .cfg = CFG"CONFIG_CHAR=\"y\"\n" },
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/* STRING */
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{ .name = "str (empty)", .cfg = CFG"CONFIG_STR=\"\"\n",
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.data = { .str_val = "\0\0\0\0\0\0\0" } },
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{ .name = "str (padded)", .cfg = CFG"CONFIG_STR=\"abra\"\n",
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.data = { .str_val = "abra\0\0\0" } },
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{ .name = "str (too long)", .cfg = CFG"CONFIG_STR=\"abracada\"\n",
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.data = { .str_val = "abracad" } },
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{ .name = "str (no value)", .fails = 1, .cfg = CFG"CONFIG_STR=\n" },
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{ .name = "str (bad value)", .fails = 1, .cfg = CFG"CONFIG_STR=bla\n" },
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/* INTEGERS */
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{
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.name = "integer forms",
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.cfg = CFG
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"CONFIG_CHAR=0xA\n"
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"CONFIG_USHORT=0462\n"
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"CONFIG_INT=-100\n"
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"CONFIG_ULONG=+1000000000000",
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.data = {
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.char_val = 0xA,
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.ushort_val = 0462,
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.int_val = -100,
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.ulong_val = 1000000000000,
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},
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},
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{ .name = "int (bad)", .fails = 1, .cfg = CFG"CONFIG_INT=abc" },
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{ .name = "int (str)", .fails = 1, .cfg = CFG"CONFIG_INT=\"abc\"" },
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{ .name = "int (empty)", .fails = 1, .cfg = CFG"CONFIG_INT=" },
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{ .name = "int (mixed)", .fails = 1, .cfg = CFG"CONFIG_INT=123abc" },
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{ .name = "int (max)", .cfg = CFG"CONFIG_INT=2147483647",
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.data = { .int_val = 2147483647 } },
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{ .name = "int (min)", .cfg = CFG"CONFIG_INT=-2147483648",
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.data = { .int_val = -2147483648 } },
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{ .name = "int (max+1)", .fails = 1, .cfg = CFG"CONFIG_INT=2147483648" },
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{ .name = "int (min-1)", .fails = 1, .cfg = CFG"CONFIG_INT=-2147483649" },
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{ .name = "ushort (max)", .cfg = CFG"CONFIG_USHORT=65535",
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.data = { .ushort_val = 65535 } },
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{ .name = "ushort (min)", .cfg = CFG"CONFIG_USHORT=0",
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.data = { .ushort_val = 0 } },
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{ .name = "ushort (max+1)", .fails = 1, .cfg = CFG"CONFIG_USHORT=65536" },
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{ .name = "ushort (min-1)", .fails = 1, .cfg = CFG"CONFIG_USHORT=-1" },
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{ .name = "u64 (max)", .cfg = CFG"CONFIG_ULONG=0xffffffffffffffff",
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.data = { .ulong_val = 0xffffffffffffffff } },
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{ .name = "u64 (min)", .cfg = CFG"CONFIG_ULONG=0",
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.data = { .ulong_val = 0 } },
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{ .name = "u64 (max+1)", .fails = 1, .cfg = CFG"CONFIG_ULONG=0x10000000000000000" },
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};
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void test_core_extern(void)
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{
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const uint32_t kern_ver = get_kernel_version();
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int err, duration = 0, i, j;
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struct test_core_extern *skel = NULL;
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uint64_t *got, *exp;
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int n = sizeof(*skel->data) / sizeof(uint64_t);
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for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
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struct test_case *t = &test_cases[i];
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DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts,
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.kconfig = t->cfg,
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);
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if (!test__start_subtest(t->name))
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continue;
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skel = test_core_extern__open_opts(&opts);
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if (CHECK(!skel, "skel_open", "skeleton open failed\n"))
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goto cleanup;
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err = test_core_extern__load(skel);
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if (t->fails) {
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CHECK(!err, "skel_load",
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"shouldn't succeed open/load of skeleton\n");
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goto cleanup;
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} else if (CHECK(err, "skel_load",
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"failed to open/load skeleton\n")) {
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goto cleanup;
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}
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err = test_core_extern__attach(skel);
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if (CHECK(err, "attach_raw_tp", "failed attach: %d\n", err))
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goto cleanup;
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usleep(1);
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t->data.kern_ver = kern_ver;
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t->data.missing_val = 0xDEADC0DE;
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got = (uint64_t *)skel->data;
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exp = (uint64_t *)&t->data;
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for (j = 0; j < n; j++) {
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CHECK(got[j] != exp[j], "check_res",
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"result #%d: expected %llx, but got %llx\n",
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j, (__u64)exp[j], (__u64)got[j]);
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}
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cleanup:
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test_core_extern__destroy(skel);
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skel = NULL;
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}
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}
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