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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 | // SPDX-License-Identifier: GPL-2.0 #include <test_progs.h> #include <linux/pkt_cls.h> #include "test_tc_bpf.skel.h" #define LO_IFINDEX 1 #define TEST_DECLARE_OPTS(__fd) \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_h, .handle = 1); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_p, .priority = 1); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_f, .prog_fd = __fd); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hp, .handle = 1, .priority = 1); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hf, .handle = 1, .prog_fd = __fd); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_pf, .priority = 1, .prog_fd = __fd); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpf, .handle = 1, .priority = 1, .prog_fd = __fd); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpi, .handle = 1, .priority = 1, .prog_id = 42); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpr, .handle = 1, .priority = 1, \ .flags = BPF_TC_F_REPLACE); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_hpfi, .handle = 1, .priority = 1, .prog_fd = __fd, \ .prog_id = 42); \ DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts_prio_max, .handle = 1, .priority = UINT16_MAX + 1); static int test_tc_bpf_basic(const struct bpf_tc_hook *hook, int fd) { DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts, .handle = 1, .priority = 1, .prog_fd = fd); struct bpf_prog_info info = {}; __u32 info_len = sizeof(info); int ret; ret = bpf_prog_get_info_by_fd(fd, &info, &info_len); if (!ASSERT_OK(ret, "bpf_prog_get_info_by_fd")) return ret; ret = bpf_tc_attach(hook, &opts); if (!ASSERT_OK(ret, "bpf_tc_attach")) return ret; if (!ASSERT_EQ(opts.handle, 1, "handle set") || !ASSERT_EQ(opts.priority, 1, "priority set") || !ASSERT_EQ(opts.prog_id, info.id, "prog_id set")) goto end; opts.prog_id = 0; opts.flags = BPF_TC_F_REPLACE; ret = bpf_tc_attach(hook, &opts); if (!ASSERT_OK(ret, "bpf_tc_attach replace mode")) goto end; opts.flags = opts.prog_fd = opts.prog_id = 0; ret = bpf_tc_query(hook, &opts); if (!ASSERT_OK(ret, "bpf_tc_query")) goto end; if (!ASSERT_EQ(opts.handle, 1, "handle set") || !ASSERT_EQ(opts.priority, 1, "priority set") || !ASSERT_EQ(opts.prog_id, info.id, "prog_id set")) goto end; end: opts.flags = opts.prog_fd = opts.prog_id = 0; ret = bpf_tc_detach(hook, &opts); ASSERT_OK(ret, "bpf_tc_detach"); return ret; } static int test_tc_bpf_api(struct bpf_tc_hook *hook, int fd) { DECLARE_LIBBPF_OPTS(bpf_tc_opts, attach_opts, .handle = 1, .priority = 1, .prog_fd = fd); DECLARE_LIBBPF_OPTS(bpf_tc_hook, inv_hook, .attach_point = BPF_TC_INGRESS); DECLARE_LIBBPF_OPTS(bpf_tc_opts, opts, .handle = 1, .priority = 1); int ret; ret = bpf_tc_hook_create(NULL); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook = NULL")) return -EINVAL; /* hook ifindex = 0 */ ret = bpf_tc_hook_create(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook ifindex == 0")) return -EINVAL; ret = bpf_tc_hook_destroy(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook ifindex == 0")) return -EINVAL; ret = bpf_tc_attach(&inv_hook, &attach_opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook ifindex == 0")) return -EINVAL; attach_opts.prog_id = 0; ret = bpf_tc_detach(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook ifindex == 0")) return -EINVAL; ret = bpf_tc_query(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook ifindex == 0")) return -EINVAL; /* hook ifindex < 0 */ inv_hook.ifindex = -1; ret = bpf_tc_hook_create(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook ifindex < 0")) return -EINVAL; ret = bpf_tc_hook_destroy(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook ifindex < 0")) return -EINVAL; ret = bpf_tc_attach(&inv_hook, &attach_opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook ifindex < 0")) return -EINVAL; attach_opts.prog_id = 0; ret = bpf_tc_detach(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook ifindex < 0")) return -EINVAL; ret = bpf_tc_query(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook ifindex < 0")) return -EINVAL; inv_hook.ifindex = LO_IFINDEX; /* hook.attach_point invalid */ inv_hook.attach_point = 0xabcd; ret = bpf_tc_hook_create(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook.attach_point")) return -EINVAL; ret = bpf_tc_hook_destroy(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook.attach_point")) return -EINVAL; ret = bpf_tc_attach(&inv_hook, &attach_opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook.attach_point")) return -EINVAL; ret = bpf_tc_detach(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook.attach_point")) return -EINVAL; ret = bpf_tc_query(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook.attach_point")) return -EINVAL; inv_hook.attach_point = BPF_TC_INGRESS; /* hook.attach_point valid, but parent invalid */ inv_hook.parent = TC_H_MAKE(1UL << 16, 10); ret = bpf_tc_hook_create(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_create invalid hook parent")) return -EINVAL; ret = bpf_tc_hook_destroy(&inv_hook); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_hook_destroy invalid hook parent")) return -EINVAL; ret = bpf_tc_attach(&inv_hook, &attach_opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook parent")) return -EINVAL; ret = bpf_tc_detach(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook parent")) return -EINVAL; ret = bpf_tc_query(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook parent")) return -EINVAL; inv_hook.attach_point = BPF_TC_CUSTOM; inv_hook.parent = 0; /* These return EOPNOTSUPP instead of EINVAL as parent is checked after * attach_point of the hook. */ ret = bpf_tc_hook_create(&inv_hook); if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_create invalid hook parent")) return -EINVAL; ret = bpf_tc_hook_destroy(&inv_hook); if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_destroy invalid hook parent")) return -EINVAL; ret = bpf_tc_attach(&inv_hook, &attach_opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook parent")) return -EINVAL; ret = bpf_tc_detach(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook parent")) return -EINVAL; ret = bpf_tc_query(&inv_hook, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook parent")) return -EINVAL; inv_hook.attach_point = BPF_TC_INGRESS; /* detach */ { TEST_DECLARE_OPTS(fd); ret = bpf_tc_detach(NULL, &opts_hp); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid hook = NULL")) return -EINVAL; ret = bpf_tc_detach(hook, NULL); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid opts = NULL")) return -EINVAL; ret = bpf_tc_detach(hook, &opts_hpr); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid flags set")) return -EINVAL; ret = bpf_tc_detach(hook, &opts_hpf); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid prog_fd set")) return -EINVAL; ret = bpf_tc_detach(hook, &opts_hpi); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid prog_id set")) return -EINVAL; ret = bpf_tc_detach(hook, &opts_p); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid handle unset")) return -EINVAL; ret = bpf_tc_detach(hook, &opts_h); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid priority unset")) return -EINVAL; ret = bpf_tc_detach(hook, &opts_prio_max); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_detach invalid priority > UINT16_MAX")) return -EINVAL; } /* query */ { TEST_DECLARE_OPTS(fd); ret = bpf_tc_query(NULL, &opts); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid hook = NULL")) return -EINVAL; ret = bpf_tc_query(hook, NULL); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid opts = NULL")) return -EINVAL; ret = bpf_tc_query(hook, &opts_hpr); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid flags set")) return -EINVAL; ret = bpf_tc_query(hook, &opts_hpf); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid prog_fd set")) return -EINVAL; ret = bpf_tc_query(hook, &opts_hpi); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid prog_id set")) return -EINVAL; ret = bpf_tc_query(hook, &opts_p); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid handle unset")) return -EINVAL; ret = bpf_tc_query(hook, &opts_h); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid priority unset")) return -EINVAL; ret = bpf_tc_query(hook, &opts_prio_max); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query invalid priority > UINT16_MAX")) return -EINVAL; /* when chain is not present, kernel returns -EINVAL */ ret = bpf_tc_query(hook, &opts_hp); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_query valid handle, priority set")) return -EINVAL; } /* attach */ { TEST_DECLARE_OPTS(fd); ret = bpf_tc_attach(NULL, &opts_hp); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid hook = NULL")) return -EINVAL; ret = bpf_tc_attach(hook, NULL); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid opts = NULL")) return -EINVAL; opts_hp.flags = 42; ret = bpf_tc_attach(hook, &opts_hp); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid flags")) return -EINVAL; ret = bpf_tc_attach(hook, NULL); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid prog_fd unset")) return -EINVAL; ret = bpf_tc_attach(hook, &opts_hpi); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid prog_id set")) return -EINVAL; ret = bpf_tc_attach(hook, &opts_pf); if (!ASSERT_OK(ret, "bpf_tc_attach valid handle unset")) return -EINVAL; opts_pf.prog_fd = opts_pf.prog_id = 0; ASSERT_OK(bpf_tc_detach(hook, &opts_pf), "bpf_tc_detach"); ret = bpf_tc_attach(hook, &opts_hf); if (!ASSERT_OK(ret, "bpf_tc_attach valid priority unset")) return -EINVAL; opts_hf.prog_fd = opts_hf.prog_id = 0; ASSERT_OK(bpf_tc_detach(hook, &opts_hf), "bpf_tc_detach"); ret = bpf_tc_attach(hook, &opts_prio_max); if (!ASSERT_EQ(ret, -EINVAL, "bpf_tc_attach invalid priority > UINT16_MAX")) return -EINVAL; ret = bpf_tc_attach(hook, &opts_f); if (!ASSERT_OK(ret, "bpf_tc_attach valid both handle and priority unset")) return -EINVAL; opts_f.prog_fd = opts_f.prog_id = 0; ASSERT_OK(bpf_tc_detach(hook, &opts_f), "bpf_tc_detach"); } return 0; } void test_tc_bpf(void) { DECLARE_LIBBPF_OPTS(bpf_tc_hook, hook, .ifindex = LO_IFINDEX, .attach_point = BPF_TC_INGRESS); struct test_tc_bpf *skel = NULL; bool hook_created = false; int cls_fd, ret; skel = test_tc_bpf__open_and_load(); if (!ASSERT_OK_PTR(skel, "test_tc_bpf__open_and_load")) return; cls_fd = bpf_program__fd(skel->progs.cls); ret = bpf_tc_hook_create(&hook); if (ret == 0) hook_created = true; ret = ret == -EEXIST ? 0 : ret; if (!ASSERT_OK(ret, "bpf_tc_hook_create(BPF_TC_INGRESS)")) goto end; hook.attach_point = BPF_TC_CUSTOM; hook.parent = TC_H_MAKE(TC_H_CLSACT, TC_H_MIN_INGRESS); ret = bpf_tc_hook_create(&hook); if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_create invalid hook.attach_point")) goto end; ret = test_tc_bpf_basic(&hook, cls_fd); if (!ASSERT_OK(ret, "test_tc_internal ingress")) goto end; ret = bpf_tc_hook_destroy(&hook); if (!ASSERT_EQ(ret, -EOPNOTSUPP, "bpf_tc_hook_destroy invalid hook.attach_point")) goto end; hook.attach_point = BPF_TC_INGRESS; hook.parent = 0; bpf_tc_hook_destroy(&hook); ret = test_tc_bpf_basic(&hook, cls_fd); if (!ASSERT_OK(ret, "test_tc_internal ingress")) goto end; bpf_tc_hook_destroy(&hook); hook.attach_point = BPF_TC_EGRESS; ret = test_tc_bpf_basic(&hook, cls_fd); if (!ASSERT_OK(ret, "test_tc_internal egress")) goto end; bpf_tc_hook_destroy(&hook); ret = test_tc_bpf_api(&hook, cls_fd); if (!ASSERT_OK(ret, "test_tc_bpf_api")) goto end; bpf_tc_hook_destroy(&hook); end: if (hook_created) { hook.attach_point = BPF_TC_INGRESS | BPF_TC_EGRESS; bpf_tc_hook_destroy(&hook); } test_tc_bpf__destroy(skel); } |