1 // SPDX-License-Identifier: GPL-2.0 2 #include <test_progs.h> 3 #include "kprobe_multi.skel.h" 4 #include "trace_helpers.h" 5 6 static void kprobe_multi_test_run(struct kprobe_multi *skel, bool test_return) 7 { 8 LIBBPF_OPTS(bpf_test_run_opts, topts); 9 int err, prog_fd; 10 11 prog_fd = bpf_program__fd(skel->progs.trigger); 12 err = bpf_prog_test_run_opts(prog_fd, &topts); 13 ASSERT_OK(err, "test_run"); 14 ASSERT_EQ(topts.retval, 0, "test_run"); 15 16 ASSERT_EQ(skel->bss->kprobe_test1_result, 1, "kprobe_test1_result"); 17 ASSERT_EQ(skel->bss->kprobe_test2_result, 1, "kprobe_test2_result"); 18 ASSERT_EQ(skel->bss->kprobe_test3_result, 1, "kprobe_test3_result"); 19 ASSERT_EQ(skel->bss->kprobe_test4_result, 1, "kprobe_test4_result"); 20 ASSERT_EQ(skel->bss->kprobe_test5_result, 1, "kprobe_test5_result"); 21 ASSERT_EQ(skel->bss->kprobe_test6_result, 1, "kprobe_test6_result"); 22 ASSERT_EQ(skel->bss->kprobe_test7_result, 1, "kprobe_test7_result"); 23 ASSERT_EQ(skel->bss->kprobe_test8_result, 1, "kprobe_test8_result"); 24 25 if (test_return) { 26 ASSERT_EQ(skel->bss->kretprobe_test1_result, 1, "kretprobe_test1_result"); 27 ASSERT_EQ(skel->bss->kretprobe_test2_result, 1, "kretprobe_test2_result"); 28 ASSERT_EQ(skel->bss->kretprobe_test3_result, 1, "kretprobe_test3_result"); 29 ASSERT_EQ(skel->bss->kretprobe_test4_result, 1, "kretprobe_test4_result"); 30 ASSERT_EQ(skel->bss->kretprobe_test5_result, 1, "kretprobe_test5_result"); 31 ASSERT_EQ(skel->bss->kretprobe_test6_result, 1, "kretprobe_test6_result"); 32 ASSERT_EQ(skel->bss->kretprobe_test7_result, 1, "kretprobe_test7_result"); 33 ASSERT_EQ(skel->bss->kretprobe_test8_result, 1, "kretprobe_test8_result"); 34 } 35 } 36 37 static void test_skel_api(void) 38 { 39 struct kprobe_multi *skel = NULL; 40 int err; 41 42 skel = kprobe_multi__open_and_load(); 43 if (!ASSERT_OK_PTR(skel, "kprobe_multi__open_and_load")) 44 goto cleanup; 45 46 skel->bss->pid = getpid(); 47 err = kprobe_multi__attach(skel); 48 if (!ASSERT_OK(err, "kprobe_multi__attach")) 49 goto cleanup; 50 51 kprobe_multi_test_run(skel, true); 52 53 cleanup: 54 kprobe_multi__destroy(skel); 55 } 56 57 static void test_link_api(struct bpf_link_create_opts *opts) 58 { 59 int prog_fd, link1_fd = -1, link2_fd = -1; 60 struct kprobe_multi *skel = NULL; 61 62 skel = kprobe_multi__open_and_load(); 63 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 64 goto cleanup; 65 66 skel->bss->pid = getpid(); 67 prog_fd = bpf_program__fd(skel->progs.test_kprobe); 68 link1_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts); 69 if (!ASSERT_GE(link1_fd, 0, "link_fd")) 70 goto cleanup; 71 72 opts->kprobe_multi.flags = BPF_F_KPROBE_MULTI_RETURN; 73 prog_fd = bpf_program__fd(skel->progs.test_kretprobe); 74 link2_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_KPROBE_MULTI, opts); 75 if (!ASSERT_GE(link2_fd, 0, "link_fd")) 76 goto cleanup; 77 78 kprobe_multi_test_run(skel, true); 79 80 cleanup: 81 if (link1_fd != -1) 82 close(link1_fd); 83 if (link2_fd != -1) 84 close(link2_fd); 85 kprobe_multi__destroy(skel); 86 } 87 88 #define GET_ADDR(__sym, __addr) ({ \ 89 __addr = ksym_get_addr(__sym); \ 90 if (!ASSERT_NEQ(__addr, 0, "kallsyms load failed for " #__sym)) \ 91 return; \ 92 }) 93 94 static void test_link_api_addrs(void) 95 { 96 LIBBPF_OPTS(bpf_link_create_opts, opts); 97 unsigned long long addrs[8]; 98 99 GET_ADDR("bpf_fentry_test1", addrs[0]); 100 GET_ADDR("bpf_fentry_test2", addrs[1]); 101 GET_ADDR("bpf_fentry_test3", addrs[2]); 102 GET_ADDR("bpf_fentry_test4", addrs[3]); 103 GET_ADDR("bpf_fentry_test5", addrs[4]); 104 GET_ADDR("bpf_fentry_test6", addrs[5]); 105 GET_ADDR("bpf_fentry_test7", addrs[6]); 106 GET_ADDR("bpf_fentry_test8", addrs[7]); 107 108 opts.kprobe_multi.addrs = (const unsigned long*) addrs; 109 opts.kprobe_multi.cnt = ARRAY_SIZE(addrs); 110 test_link_api(&opts); 111 } 112 113 static void test_link_api_syms(void) 114 { 115 LIBBPF_OPTS(bpf_link_create_opts, opts); 116 const char *syms[8] = { 117 "bpf_fentry_test1", 118 "bpf_fentry_test2", 119 "bpf_fentry_test3", 120 "bpf_fentry_test4", 121 "bpf_fentry_test5", 122 "bpf_fentry_test6", 123 "bpf_fentry_test7", 124 "bpf_fentry_test8", 125 }; 126 127 opts.kprobe_multi.syms = syms; 128 opts.kprobe_multi.cnt = ARRAY_SIZE(syms); 129 test_link_api(&opts); 130 } 131 132 static void 133 test_attach_api(const char *pattern, struct bpf_kprobe_multi_opts *opts) 134 { 135 struct bpf_link *link1 = NULL, *link2 = NULL; 136 struct kprobe_multi *skel = NULL; 137 138 skel = kprobe_multi__open_and_load(); 139 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 140 goto cleanup; 141 142 skel->bss->pid = getpid(); 143 link1 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe, 144 pattern, opts); 145 if (!ASSERT_OK_PTR(link1, "bpf_program__attach_kprobe_multi_opts")) 146 goto cleanup; 147 148 if (opts) { 149 opts->retprobe = true; 150 link2 = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kretprobe, 151 pattern, opts); 152 if (!ASSERT_OK_PTR(link2, "bpf_program__attach_kprobe_multi_opts")) 153 goto cleanup; 154 } 155 156 kprobe_multi_test_run(skel, !!opts); 157 158 cleanup: 159 bpf_link__destroy(link2); 160 bpf_link__destroy(link1); 161 kprobe_multi__destroy(skel); 162 } 163 164 static void test_attach_api_pattern(void) 165 { 166 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 167 168 test_attach_api("bpf_fentry_test*", &opts); 169 test_attach_api("bpf_fentry_test?", NULL); 170 } 171 172 static void test_attach_api_addrs(void) 173 { 174 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 175 unsigned long long addrs[8]; 176 177 GET_ADDR("bpf_fentry_test1", addrs[0]); 178 GET_ADDR("bpf_fentry_test2", addrs[1]); 179 GET_ADDR("bpf_fentry_test3", addrs[2]); 180 GET_ADDR("bpf_fentry_test4", addrs[3]); 181 GET_ADDR("bpf_fentry_test5", addrs[4]); 182 GET_ADDR("bpf_fentry_test6", addrs[5]); 183 GET_ADDR("bpf_fentry_test7", addrs[6]); 184 GET_ADDR("bpf_fentry_test8", addrs[7]); 185 186 opts.addrs = (const unsigned long *) addrs; 187 opts.cnt = ARRAY_SIZE(addrs); 188 test_attach_api(NULL, &opts); 189 } 190 191 static void test_attach_api_syms(void) 192 { 193 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 194 const char *syms[8] = { 195 "bpf_fentry_test1", 196 "bpf_fentry_test2", 197 "bpf_fentry_test3", 198 "bpf_fentry_test4", 199 "bpf_fentry_test5", 200 "bpf_fentry_test6", 201 "bpf_fentry_test7", 202 "bpf_fentry_test8", 203 }; 204 205 opts.syms = syms; 206 opts.cnt = ARRAY_SIZE(syms); 207 test_attach_api(NULL, &opts); 208 } 209 210 static void test_attach_api_fails(void) 211 { 212 LIBBPF_OPTS(bpf_kprobe_multi_opts, opts); 213 struct kprobe_multi *skel = NULL; 214 struct bpf_link *link = NULL; 215 unsigned long long addrs[2]; 216 const char *syms[2] = { 217 "bpf_fentry_test1", 218 "bpf_fentry_test2", 219 }; 220 __u64 cookies[2]; 221 222 addrs[0] = ksym_get_addr("bpf_fentry_test1"); 223 addrs[1] = ksym_get_addr("bpf_fentry_test2"); 224 225 if (!ASSERT_FALSE(!addrs[0] || !addrs[1], "ksym_get_addr")) 226 goto cleanup; 227 228 skel = kprobe_multi__open_and_load(); 229 if (!ASSERT_OK_PTR(skel, "fentry_raw_skel_load")) 230 goto cleanup; 231 232 skel->bss->pid = getpid(); 233 234 /* fail_1 - pattern and opts NULL */ 235 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe, 236 NULL, NULL); 237 if (!ASSERT_ERR_PTR(link, "fail_1")) 238 goto cleanup; 239 240 if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_1_error")) 241 goto cleanup; 242 243 /* fail_2 - both addrs and syms set */ 244 opts.addrs = (const unsigned long *) addrs; 245 opts.syms = syms; 246 opts.cnt = ARRAY_SIZE(syms); 247 opts.cookies = NULL; 248 249 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe, 250 NULL, &opts); 251 if (!ASSERT_ERR_PTR(link, "fail_2")) 252 goto cleanup; 253 254 if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_2_error")) 255 goto cleanup; 256 257 /* fail_3 - pattern and addrs set */ 258 opts.addrs = (const unsigned long *) addrs; 259 opts.syms = NULL; 260 opts.cnt = ARRAY_SIZE(syms); 261 opts.cookies = NULL; 262 263 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe, 264 "ksys_*", &opts); 265 if (!ASSERT_ERR_PTR(link, "fail_3")) 266 goto cleanup; 267 268 if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_3_error")) 269 goto cleanup; 270 271 /* fail_4 - pattern and cnt set */ 272 opts.addrs = NULL; 273 opts.syms = NULL; 274 opts.cnt = ARRAY_SIZE(syms); 275 opts.cookies = NULL; 276 277 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe, 278 "ksys_*", &opts); 279 if (!ASSERT_ERR_PTR(link, "fail_4")) 280 goto cleanup; 281 282 if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_4_error")) 283 goto cleanup; 284 285 /* fail_5 - pattern and cookies */ 286 opts.addrs = NULL; 287 opts.syms = NULL; 288 opts.cnt = 0; 289 opts.cookies = cookies; 290 291 link = bpf_program__attach_kprobe_multi_opts(skel->progs.test_kprobe, 292 "ksys_*", &opts); 293 if (!ASSERT_ERR_PTR(link, "fail_5")) 294 goto cleanup; 295 296 if (!ASSERT_EQ(libbpf_get_error(link), -EINVAL, "fail_5_error")) 297 goto cleanup; 298 299 cleanup: 300 bpf_link__destroy(link); 301 kprobe_multi__destroy(skel); 302 } 303 304 void test_kprobe_multi_test(void) 305 { 306 if (!ASSERT_OK(load_kallsyms(), "load_kallsyms")) 307 return; 308 309 if (test__start_subtest("skel_api")) 310 test_skel_api(); 311 if (test__start_subtest("link_api_addrs")) 312 test_link_api_syms(); 313 if (test__start_subtest("link_api_syms")) 314 test_link_api_addrs(); 315 if (test__start_subtest("attach_api_pattern")) 316 test_attach_api_pattern(); 317 if (test__start_subtest("attach_api_addrs")) 318 test_attach_api_addrs(); 319 if (test__start_subtest("attach_api_syms")) 320 test_attach_api_syms(); 321 if (test__start_subtest("attach_api_fails")) 322 test_attach_api_fails(); 323 } 324