1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 4 #include <test_progs.h> 5 #include <sys/mman.h> 6 #include <sys/utsname.h> 7 #include <linux/version.h> 8 #include "test_core_extern.skel.h" 9 10 static uint32_t get_kernel_version(void) 11 { 12 uint32_t major, minor, patch; 13 struct utsname info; 14 15 uname(&info); 16 if (sscanf(info.release, "%u.%u.%u", &major, &minor, &patch) != 3) 17 return 0; 18 return KERNEL_VERSION(major, minor, patch); 19 } 20 21 #define CFG "CONFIG_BPF_SYSCALL=n\n" 22 23 static struct test_case { 24 const char *name; 25 const char *cfg; 26 bool fails; 27 struct test_core_extern__data data; 28 } test_cases[] = { 29 { .name = "default search path", .data = { .bpf_syscall = true } }, 30 { 31 .name = "custom values", 32 .cfg = "CONFIG_BPF_SYSCALL=n\n" 33 "CONFIG_TRISTATE=m\n" 34 "CONFIG_BOOL=y\n" 35 "CONFIG_CHAR=100\n" 36 "CONFIG_USHORT=30000\n" 37 "CONFIG_INT=123456\n" 38 "CONFIG_ULONG=0xDEADBEEFC0DE\n" 39 "CONFIG_STR=\"abracad\"\n" 40 "CONFIG_MISSING=0", 41 .data = { 42 .unkn_virt_val = 0, 43 .bpf_syscall = false, 44 .tristate_val = TRI_MODULE, 45 .bool_val = true, 46 .char_val = 100, 47 .ushort_val = 30000, 48 .int_val = 123456, 49 .ulong_val = 0xDEADBEEFC0DE, 50 .str_val = "abracad", 51 }, 52 }, 53 /* TRISTATE */ 54 { .name = "tristate (y)", .cfg = CFG"CONFIG_TRISTATE=y\n", 55 .data = { .tristate_val = TRI_YES } }, 56 { .name = "tristate (n)", .cfg = CFG"CONFIG_TRISTATE=n\n", 57 .data = { .tristate_val = TRI_NO } }, 58 { .name = "tristate (m)", .cfg = CFG"CONFIG_TRISTATE=m\n", 59 .data = { .tristate_val = TRI_MODULE } }, 60 { .name = "tristate (int)", .fails = 1, .cfg = CFG"CONFIG_TRISTATE=1" }, 61 { .name = "tristate (bad)", .fails = 1, .cfg = CFG"CONFIG_TRISTATE=M" }, 62 /* BOOL */ 63 { .name = "bool (y)", .cfg = CFG"CONFIG_BOOL=y\n", 64 .data = { .bool_val = true } }, 65 { .name = "bool (n)", .cfg = CFG"CONFIG_BOOL=n\n", 66 .data = { .bool_val = false } }, 67 { .name = "bool (tristate)", .fails = 1, .cfg = CFG"CONFIG_BOOL=m" }, 68 { .name = "bool (int)", .fails = 1, .cfg = CFG"CONFIG_BOOL=1" }, 69 /* CHAR */ 70 { .name = "char (tristate)", .cfg = CFG"CONFIG_CHAR=m\n", 71 .data = { .char_val = 'm' } }, 72 { .name = "char (bad)", .fails = 1, .cfg = CFG"CONFIG_CHAR=q\n" }, 73 { .name = "char (empty)", .fails = 1, .cfg = CFG"CONFIG_CHAR=\n" }, 74 { .name = "char (str)", .fails = 1, .cfg = CFG"CONFIG_CHAR=\"y\"\n" }, 75 /* STRING */ 76 { .name = "str (empty)", .cfg = CFG"CONFIG_STR=\"\"\n", 77 .data = { .str_val = "\0\0\0\0\0\0\0" } }, 78 { .name = "str (padded)", .cfg = CFG"CONFIG_STR=\"abra\"\n", 79 .data = { .str_val = "abra\0\0\0" } }, 80 { .name = "str (too long)", .cfg = CFG"CONFIG_STR=\"abracada\"\n", 81 .data = { .str_val = "abracad" } }, 82 { .name = "str (no value)", .fails = 1, .cfg = CFG"CONFIG_STR=\n" }, 83 { .name = "str (bad value)", .fails = 1, .cfg = CFG"CONFIG_STR=bla\n" }, 84 /* INTEGERS */ 85 { 86 .name = "integer forms", 87 .cfg = CFG 88 "CONFIG_CHAR=0xA\n" 89 "CONFIG_USHORT=0462\n" 90 "CONFIG_INT=-100\n" 91 "CONFIG_ULONG=+1000000000000", 92 .data = { 93 .char_val = 0xA, 94 .ushort_val = 0462, 95 .int_val = -100, 96 .ulong_val = 1000000000000, 97 }, 98 }, 99 { .name = "int (bad)", .fails = 1, .cfg = CFG"CONFIG_INT=abc" }, 100 { .name = "int (str)", .fails = 1, .cfg = CFG"CONFIG_INT=\"abc\"" }, 101 { .name = "int (empty)", .fails = 1, .cfg = CFG"CONFIG_INT=" }, 102 { .name = "int (mixed)", .fails = 1, .cfg = CFG"CONFIG_INT=123abc" }, 103 { .name = "int (max)", .cfg = CFG"CONFIG_INT=2147483647", 104 .data = { .int_val = 2147483647 } }, 105 { .name = "int (min)", .cfg = CFG"CONFIG_INT=-2147483648", 106 .data = { .int_val = -2147483648 } }, 107 { .name = "int (max+1)", .fails = 1, .cfg = CFG"CONFIG_INT=2147483648" }, 108 { .name = "int (min-1)", .fails = 1, .cfg = CFG"CONFIG_INT=-2147483649" }, 109 { .name = "ushort (max)", .cfg = CFG"CONFIG_USHORT=65535", 110 .data = { .ushort_val = 65535 } }, 111 { .name = "ushort (min)", .cfg = CFG"CONFIG_USHORT=0", 112 .data = { .ushort_val = 0 } }, 113 { .name = "ushort (max+1)", .fails = 1, .cfg = CFG"CONFIG_USHORT=65536" }, 114 { .name = "ushort (min-1)", .fails = 1, .cfg = CFG"CONFIG_USHORT=-1" }, 115 { .name = "u64 (max)", .cfg = CFG"CONFIG_ULONG=0xffffffffffffffff", 116 .data = { .ulong_val = 0xffffffffffffffff } }, 117 { .name = "u64 (min)", .cfg = CFG"CONFIG_ULONG=0", 118 .data = { .ulong_val = 0 } }, 119 { .name = "u64 (max+1)", .fails = 1, .cfg = CFG"CONFIG_ULONG=0x10000000000000000" }, 120 }; 121 122 void test_core_extern(void) 123 { 124 const uint32_t kern_ver = get_kernel_version(); 125 int err, i, j; 126 struct test_core_extern *skel = NULL; 127 uint64_t *got, *exp; 128 int n = sizeof(*skel->data) / sizeof(uint64_t); 129 130 for (i = 0; i < ARRAY_SIZE(test_cases); i++) { 131 struct test_case *t = &test_cases[i]; 132 DECLARE_LIBBPF_OPTS(bpf_object_open_opts, opts, 133 .kconfig = t->cfg, 134 ); 135 136 if (!test__start_subtest(t->name)) 137 continue; 138 139 skel = test_core_extern__open_opts(&opts); 140 if (!ASSERT_OK_PTR(skel, "skel_open")) 141 goto cleanup; 142 err = test_core_extern__load(skel); 143 if (t->fails) { 144 ASSERT_ERR(err, "skel_load_should_fail"); 145 goto cleanup; 146 } else if (!ASSERT_OK(err, "skel_load")) { 147 goto cleanup; 148 } 149 err = test_core_extern__attach(skel); 150 if (!ASSERT_OK(err, "attach_raw_tp")) 151 goto cleanup; 152 153 usleep(1); 154 155 t->data.kern_ver = kern_ver; 156 t->data.missing_val = 0xDEADC0DE; 157 got = (uint64_t *)skel->data; 158 exp = (uint64_t *)&t->data; 159 for (j = 0; j < n; j++) { 160 ASSERT_EQ(got[j], exp[j], "result"); 161 } 162 cleanup: 163 test_core_extern__destroy(skel); 164 skel = NULL; 165 } 166 } 167