1// SPDX-License-Identifier: GPL-2.0 2#include <test_progs.h> 3#include <network_helpers.h> 4#include <error.h> 5#include <linux/if.h> 6#include <linux/if_tun.h> 7#include <sys/uio.h> 8 9#include "bpf_flow.skel.h" 10 11#define FLOW_CONTINUE_SADDR 0x7f00007f /* 127.0.0.127 */ 12 13#ifndef IP_MF 14#define IP_MF 0x2000 15#endif 16 17#define CHECK_FLOW_KEYS(desc, got, expected) \ 18 _CHECK(memcmp(&got, &expected, sizeof(got)) != 0, \ 19 desc, \ 20 topts.duration, \ 21 "nhoff=%u/%u " \ 22 "thoff=%u/%u " \ 23 "addr_proto=0x%x/0x%x " \ 24 "is_frag=%u/%u " \ 25 "is_first_frag=%u/%u " \ 26 "is_encap=%u/%u " \ 27 "ip_proto=0x%x/0x%x " \ 28 "n_proto=0x%x/0x%x " \ 29 "flow_label=0x%x/0x%x " \ 30 "sport=%u/%u " \ 31 "dport=%u/%u\n", \ 32 got.nhoff, expected.nhoff, \ 33 got.thoff, expected.thoff, \ 34 got.addr_proto, expected.addr_proto, \ 35 got.is_frag, expected.is_frag, \ 36 got.is_first_frag, expected.is_first_frag, \ 37 got.is_encap, expected.is_encap, \ 38 got.ip_proto, expected.ip_proto, \ 39 got.n_proto, expected.n_proto, \ 40 got.flow_label, expected.flow_label, \ 41 got.sport, expected.sport, \ 42 got.dport, expected.dport) 43 44struct ipv4_pkt { 45 struct ethhdr eth; 46 struct iphdr iph; 47 struct tcphdr tcp; 48} __packed; 49 50struct ipip_pkt { 51 struct ethhdr eth; 52 struct iphdr iph; 53 struct iphdr iph_inner; 54 struct tcphdr tcp; 55} __packed; 56 57struct svlan_ipv4_pkt { 58 struct ethhdr eth; 59 __u16 vlan_tci; 60 __u16 vlan_proto; 61 struct iphdr iph; 62 struct tcphdr tcp; 63} __packed; 64 65struct ipv6_pkt { 66 struct ethhdr eth; 67 struct ipv6hdr iph; 68 struct tcphdr tcp; 69} __packed; 70 71struct ipv6_frag_pkt { 72 struct ethhdr eth; 73 struct ipv6hdr iph; 74 struct frag_hdr { 75 __u8 nexthdr; 76 __u8 reserved; 77 __be16 frag_off; 78 __be32 identification; 79 } ipf; 80 struct tcphdr tcp; 81} __packed; 82 83struct dvlan_ipv6_pkt { 84 struct ethhdr eth; 85 __u16 vlan_tci; 86 __u16 vlan_proto; 87 __u16 vlan_tci2; 88 __u16 vlan_proto2; 89 struct ipv6hdr iph; 90 struct tcphdr tcp; 91} __packed; 92 93struct test { 94 const char *name; 95 union { 96 struct ipv4_pkt ipv4; 97 struct svlan_ipv4_pkt svlan_ipv4; 98 struct ipip_pkt ipip; 99 struct ipv6_pkt ipv6; 100 struct ipv6_frag_pkt ipv6_frag; 101 struct dvlan_ipv6_pkt dvlan_ipv6; 102 } pkt; 103 struct bpf_flow_keys keys; 104 __u32 flags; 105 __u32 retval; 106}; 107 108#define VLAN_HLEN 4 109 110static __u32 duration; 111struct test tests[] = { 112 { 113 .name = "ipv4", 114 .pkt.ipv4 = { 115 .eth.h_proto = __bpf_constant_htons(ETH_P_IP), 116 .iph.ihl = 5, 117 .iph.protocol = IPPROTO_TCP, 118 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 119 .tcp.doff = 5, 120 .tcp.source = 80, 121 .tcp.dest = 8080, 122 }, 123 .keys = { 124 .nhoff = ETH_HLEN, 125 .thoff = ETH_HLEN + sizeof(struct iphdr), 126 .addr_proto = ETH_P_IP, 127 .ip_proto = IPPROTO_TCP, 128 .n_proto = __bpf_constant_htons(ETH_P_IP), 129 .sport = 80, 130 .dport = 8080, 131 }, 132 .retval = BPF_OK, 133 }, 134 { 135 .name = "ipv6", 136 .pkt.ipv6 = { 137 .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), 138 .iph.nexthdr = IPPROTO_TCP, 139 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 140 .tcp.doff = 5, 141 .tcp.source = 80, 142 .tcp.dest = 8080, 143 }, 144 .keys = { 145 .nhoff = ETH_HLEN, 146 .thoff = ETH_HLEN + sizeof(struct ipv6hdr), 147 .addr_proto = ETH_P_IPV6, 148 .ip_proto = IPPROTO_TCP, 149 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 150 .sport = 80, 151 .dport = 8080, 152 }, 153 .retval = BPF_OK, 154 }, 155 { 156 .name = "802.1q-ipv4", 157 .pkt.svlan_ipv4 = { 158 .eth.h_proto = __bpf_constant_htons(ETH_P_8021Q), 159 .vlan_proto = __bpf_constant_htons(ETH_P_IP), 160 .iph.ihl = 5, 161 .iph.protocol = IPPROTO_TCP, 162 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 163 .tcp.doff = 5, 164 .tcp.source = 80, 165 .tcp.dest = 8080, 166 }, 167 .keys = { 168 .nhoff = ETH_HLEN + VLAN_HLEN, 169 .thoff = ETH_HLEN + VLAN_HLEN + sizeof(struct iphdr), 170 .addr_proto = ETH_P_IP, 171 .ip_proto = IPPROTO_TCP, 172 .n_proto = __bpf_constant_htons(ETH_P_IP), 173 .sport = 80, 174 .dport = 8080, 175 }, 176 .retval = BPF_OK, 177 }, 178 { 179 .name = "802.1ad-ipv6", 180 .pkt.dvlan_ipv6 = { 181 .eth.h_proto = __bpf_constant_htons(ETH_P_8021AD), 182 .vlan_proto = __bpf_constant_htons(ETH_P_8021Q), 183 .vlan_proto2 = __bpf_constant_htons(ETH_P_IPV6), 184 .iph.nexthdr = IPPROTO_TCP, 185 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 186 .tcp.doff = 5, 187 .tcp.source = 80, 188 .tcp.dest = 8080, 189 }, 190 .keys = { 191 .nhoff = ETH_HLEN + VLAN_HLEN * 2, 192 .thoff = ETH_HLEN + VLAN_HLEN * 2 + 193 sizeof(struct ipv6hdr), 194 .addr_proto = ETH_P_IPV6, 195 .ip_proto = IPPROTO_TCP, 196 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 197 .sport = 80, 198 .dport = 8080, 199 }, 200 .retval = BPF_OK, 201 }, 202 { 203 .name = "ipv4-frag", 204 .pkt.ipv4 = { 205 .eth.h_proto = __bpf_constant_htons(ETH_P_IP), 206 .iph.ihl = 5, 207 .iph.protocol = IPPROTO_TCP, 208 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 209 .iph.frag_off = __bpf_constant_htons(IP_MF), 210 .tcp.doff = 5, 211 .tcp.source = 80, 212 .tcp.dest = 8080, 213 }, 214 .keys = { 215 .flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG, 216 .nhoff = ETH_HLEN, 217 .thoff = ETH_HLEN + sizeof(struct iphdr), 218 .addr_proto = ETH_P_IP, 219 .ip_proto = IPPROTO_TCP, 220 .n_proto = __bpf_constant_htons(ETH_P_IP), 221 .is_frag = true, 222 .is_first_frag = true, 223 .sport = 80, 224 .dport = 8080, 225 }, 226 .flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG, 227 .retval = BPF_OK, 228 }, 229 { 230 .name = "ipv4-no-frag", 231 .pkt.ipv4 = { 232 .eth.h_proto = __bpf_constant_htons(ETH_P_IP), 233 .iph.ihl = 5, 234 .iph.protocol = IPPROTO_TCP, 235 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 236 .iph.frag_off = __bpf_constant_htons(IP_MF), 237 .tcp.doff = 5, 238 .tcp.source = 80, 239 .tcp.dest = 8080, 240 }, 241 .keys = { 242 .nhoff = ETH_HLEN, 243 .thoff = ETH_HLEN + sizeof(struct iphdr), 244 .addr_proto = ETH_P_IP, 245 .ip_proto = IPPROTO_TCP, 246 .n_proto = __bpf_constant_htons(ETH_P_IP), 247 .is_frag = true, 248 .is_first_frag = true, 249 }, 250 .retval = BPF_OK, 251 }, 252 { 253 .name = "ipv6-frag", 254 .pkt.ipv6_frag = { 255 .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), 256 .iph.nexthdr = IPPROTO_FRAGMENT, 257 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 258 .ipf.nexthdr = IPPROTO_TCP, 259 .tcp.doff = 5, 260 .tcp.source = 80, 261 .tcp.dest = 8080, 262 }, 263 .keys = { 264 .flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG, 265 .nhoff = ETH_HLEN, 266 .thoff = ETH_HLEN + sizeof(struct ipv6hdr) + 267 sizeof(struct frag_hdr), 268 .addr_proto = ETH_P_IPV6, 269 .ip_proto = IPPROTO_TCP, 270 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 271 .is_frag = true, 272 .is_first_frag = true, 273 .sport = 80, 274 .dport = 8080, 275 }, 276 .flags = BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG, 277 .retval = BPF_OK, 278 }, 279 { 280 .name = "ipv6-no-frag", 281 .pkt.ipv6_frag = { 282 .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), 283 .iph.nexthdr = IPPROTO_FRAGMENT, 284 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 285 .ipf.nexthdr = IPPROTO_TCP, 286 .tcp.doff = 5, 287 .tcp.source = 80, 288 .tcp.dest = 8080, 289 }, 290 .keys = { 291 .nhoff = ETH_HLEN, 292 .thoff = ETH_HLEN + sizeof(struct ipv6hdr) + 293 sizeof(struct frag_hdr), 294 .addr_proto = ETH_P_IPV6, 295 .ip_proto = IPPROTO_TCP, 296 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 297 .is_frag = true, 298 .is_first_frag = true, 299 }, 300 .retval = BPF_OK, 301 }, 302 { 303 .name = "ipv6-flow-label", 304 .pkt.ipv6 = { 305 .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), 306 .iph.nexthdr = IPPROTO_TCP, 307 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 308 .iph.flow_lbl = { 0xb, 0xee, 0xef }, 309 .tcp.doff = 5, 310 .tcp.source = 80, 311 .tcp.dest = 8080, 312 }, 313 .keys = { 314 .nhoff = ETH_HLEN, 315 .thoff = ETH_HLEN + sizeof(struct ipv6hdr), 316 .addr_proto = ETH_P_IPV6, 317 .ip_proto = IPPROTO_TCP, 318 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 319 .sport = 80, 320 .dport = 8080, 321 .flow_label = __bpf_constant_htonl(0xbeeef), 322 }, 323 .retval = BPF_OK, 324 }, 325 { 326 .name = "ipv6-no-flow-label", 327 .pkt.ipv6 = { 328 .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), 329 .iph.nexthdr = IPPROTO_TCP, 330 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 331 .iph.flow_lbl = { 0xb, 0xee, 0xef }, 332 .tcp.doff = 5, 333 .tcp.source = 80, 334 .tcp.dest = 8080, 335 }, 336 .keys = { 337 .flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL, 338 .nhoff = ETH_HLEN, 339 .thoff = ETH_HLEN + sizeof(struct ipv6hdr), 340 .addr_proto = ETH_P_IPV6, 341 .ip_proto = IPPROTO_TCP, 342 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 343 .flow_label = __bpf_constant_htonl(0xbeeef), 344 }, 345 .flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL, 346 .retval = BPF_OK, 347 }, 348 { 349 .name = "ipv6-empty-flow-label", 350 .pkt.ipv6 = { 351 .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), 352 .iph.nexthdr = IPPROTO_TCP, 353 .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), 354 .iph.flow_lbl = { 0x00, 0x00, 0x00 }, 355 .tcp.doff = 5, 356 .tcp.source = 80, 357 .tcp.dest = 8080, 358 }, 359 .keys = { 360 .flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL, 361 .nhoff = ETH_HLEN, 362 .thoff = ETH_HLEN + sizeof(struct ipv6hdr), 363 .addr_proto = ETH_P_IPV6, 364 .ip_proto = IPPROTO_TCP, 365 .n_proto = __bpf_constant_htons(ETH_P_IPV6), 366 .sport = 80, 367 .dport = 8080, 368 }, 369 .flags = BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL, 370 .retval = BPF_OK, 371 }, 372 { 373 .name = "ipip-encap", 374 .pkt.ipip = { 375 .eth.h_proto = __bpf_constant_htons(ETH_P_IP), 376 .iph.ihl = 5, 377 .iph.protocol = IPPROTO_IPIP, 378 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 379 .iph_inner.ihl = 5, 380 .iph_inner.protocol = IPPROTO_TCP, 381 .iph_inner.tot_len = 382 __bpf_constant_htons(MAGIC_BYTES) - 383 sizeof(struct iphdr), 384 .tcp.doff = 5, 385 .tcp.source = 80, 386 .tcp.dest = 8080, 387 }, 388 .keys = { 389 .nhoff = ETH_HLEN, 390 .thoff = ETH_HLEN + sizeof(struct iphdr) + 391 sizeof(struct iphdr), 392 .addr_proto = ETH_P_IP, 393 .ip_proto = IPPROTO_TCP, 394 .n_proto = __bpf_constant_htons(ETH_P_IP), 395 .is_encap = true, 396 .sport = 80, 397 .dport = 8080, 398 }, 399 .retval = BPF_OK, 400 }, 401 { 402 .name = "ipip-no-encap", 403 .pkt.ipip = { 404 .eth.h_proto = __bpf_constant_htons(ETH_P_IP), 405 .iph.ihl = 5, 406 .iph.protocol = IPPROTO_IPIP, 407 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 408 .iph_inner.ihl = 5, 409 .iph_inner.protocol = IPPROTO_TCP, 410 .iph_inner.tot_len = 411 __bpf_constant_htons(MAGIC_BYTES) - 412 sizeof(struct iphdr), 413 .tcp.doff = 5, 414 .tcp.source = 80, 415 .tcp.dest = 8080, 416 }, 417 .keys = { 418 .flags = BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP, 419 .nhoff = ETH_HLEN, 420 .thoff = ETH_HLEN + sizeof(struct iphdr), 421 .addr_proto = ETH_P_IP, 422 .ip_proto = IPPROTO_IPIP, 423 .n_proto = __bpf_constant_htons(ETH_P_IP), 424 .is_encap = true, 425 }, 426 .flags = BPF_FLOW_DISSECTOR_F_STOP_AT_ENCAP, 427 .retval = BPF_OK, 428 }, 429 { 430 .name = "ipip-encap-dissector-continue", 431 .pkt.ipip = { 432 .eth.h_proto = __bpf_constant_htons(ETH_P_IP), 433 .iph.ihl = 5, 434 .iph.protocol = IPPROTO_IPIP, 435 .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), 436 .iph.saddr = __bpf_constant_htonl(FLOW_CONTINUE_SADDR), 437 .iph_inner.ihl = 5, 438 .iph_inner.protocol = IPPROTO_TCP, 439 .iph_inner.tot_len = 440 __bpf_constant_htons(MAGIC_BYTES) - 441 sizeof(struct iphdr), 442 .tcp.doff = 5, 443 .tcp.source = 99, 444 .tcp.dest = 9090, 445 }, 446 .retval = BPF_FLOW_DISSECTOR_CONTINUE, 447 }, 448}; 449 450static int create_tap(const char *ifname) 451{ 452 struct ifreq ifr = { 453 .ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS, 454 }; 455 int fd, ret; 456 457 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); 458 459 fd = open("/dev/net/tun", O_RDWR); 460 if (fd < 0) 461 return -1; 462 463 ret = ioctl(fd, TUNSETIFF, &ifr); 464 if (ret) 465 return -1; 466 467 return fd; 468} 469 470static int tx_tap(int fd, void *pkt, size_t len) 471{ 472 struct iovec iov[] = { 473 { 474 .iov_len = len, 475 .iov_base = pkt, 476 }, 477 }; 478 return writev(fd, iov, ARRAY_SIZE(iov)); 479} 480 481static int ifup(const char *ifname) 482{ 483 struct ifreq ifr = {}; 484 int sk, ret; 485 486 strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); 487 488 sk = socket(PF_INET, SOCK_DGRAM, 0); 489 if (sk < 0) 490 return -1; 491 492 ret = ioctl(sk, SIOCGIFFLAGS, &ifr); 493 if (ret) { 494 close(sk); 495 return -1; 496 } 497 498 ifr.ifr_flags |= IFF_UP; 499 ret = ioctl(sk, SIOCSIFFLAGS, &ifr); 500 if (ret) { 501 close(sk); 502 return -1; 503 } 504 505 close(sk); 506 return 0; 507} 508 509static int init_prog_array(struct bpf_object *obj, struct bpf_map *prog_array) 510{ 511 int i, err, map_fd, prog_fd; 512 struct bpf_program *prog; 513 char prog_name[32]; 514 515 map_fd = bpf_map__fd(prog_array); 516 if (map_fd < 0) 517 return -1; 518 519 for (i = 0; i < bpf_map__max_entries(prog_array); i++) { 520 snprintf(prog_name, sizeof(prog_name), "flow_dissector_%d", i); 521 522 prog = bpf_object__find_program_by_name(obj, prog_name); 523 if (!prog) 524 return -1; 525 526 prog_fd = bpf_program__fd(prog); 527 if (prog_fd < 0) 528 return -1; 529 530 err = bpf_map_update_elem(map_fd, &i, &prog_fd, BPF_ANY); 531 if (err) 532 return -1; 533 } 534 return 0; 535} 536 537static void run_tests_skb_less(int tap_fd, struct bpf_map *keys) 538{ 539 int i, err, keys_fd; 540 541 keys_fd = bpf_map__fd(keys); 542 if (CHECK(keys_fd < 0, "bpf_map__fd", "err %d\n", keys_fd)) 543 return; 544 545 for (i = 0; i < ARRAY_SIZE(tests); i++) { 546 /* Keep in sync with 'flags' from eth_get_headlen. */ 547 __u32 eth_get_headlen_flags = 548 BPF_FLOW_DISSECTOR_F_PARSE_1ST_FRAG; 549 LIBBPF_OPTS(bpf_test_run_opts, topts); 550 struct bpf_flow_keys flow_keys = {}; 551 __u32 key = (__u32)(tests[i].keys.sport) << 16 | 552 tests[i].keys.dport; 553 554 /* For skb-less case we can't pass input flags; run 555 * only the tests that have a matching set of flags. 556 */ 557 558 if (tests[i].flags != eth_get_headlen_flags) 559 continue; 560 561 err = tx_tap(tap_fd, &tests[i].pkt, sizeof(tests[i].pkt)); 562 CHECK(err < 0, "tx_tap", "err %d errno %d\n", err, errno); 563 564 /* check the stored flow_keys only if BPF_OK expected */ 565 if (tests[i].retval != BPF_OK) 566 continue; 567 568 err = bpf_map_lookup_elem(keys_fd, &key, &flow_keys); 569 ASSERT_OK(err, "bpf_map_lookup_elem"); 570 571 CHECK_FLOW_KEYS(tests[i].name, flow_keys, tests[i].keys); 572 573 err = bpf_map_delete_elem(keys_fd, &key); 574 ASSERT_OK(err, "bpf_map_delete_elem"); 575 } 576} 577 578static void test_skb_less_prog_attach(struct bpf_flow *skel, int tap_fd) 579{ 580 int err, prog_fd; 581 582 prog_fd = bpf_program__fd(skel->progs._dissect); 583 if (CHECK(prog_fd < 0, "bpf_program__fd", "err %d\n", prog_fd)) 584 return; 585 586 err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0); 587 if (CHECK(err, "bpf_prog_attach", "err %d errno %d\n", err, errno)) 588 return; 589 590 run_tests_skb_less(tap_fd, skel->maps.last_dissection); 591 592 err = bpf_prog_detach2(prog_fd, 0, BPF_FLOW_DISSECTOR); 593 CHECK(err, "bpf_prog_detach2", "err %d errno %d\n", err, errno); 594} 595 596static void test_skb_less_link_create(struct bpf_flow *skel, int tap_fd) 597{ 598 struct bpf_link *link; 599 int err, net_fd; 600 601 net_fd = open("/proc/self/ns/net", O_RDONLY); 602 if (CHECK(net_fd < 0, "open(/proc/self/ns/net)", "err %d\n", errno)) 603 return; 604 605 link = bpf_program__attach_netns(skel->progs._dissect, net_fd); 606 if (!ASSERT_OK_PTR(link, "attach_netns")) 607 goto out_close; 608 609 run_tests_skb_less(tap_fd, skel->maps.last_dissection); 610 611 err = bpf_link__destroy(link); 612 CHECK(err, "bpf_link__destroy", "err %d\n", err); 613out_close: 614 close(net_fd); 615} 616 617void test_flow_dissector(void) 618{ 619 int i, err, prog_fd, keys_fd = -1, tap_fd; 620 struct bpf_flow *skel; 621 622 skel = bpf_flow__open_and_load(); 623 if (CHECK(!skel, "skel", "failed to open/load skeleton\n")) 624 return; 625 626 prog_fd = bpf_program__fd(skel->progs._dissect); 627 if (CHECK(prog_fd < 0, "bpf_program__fd", "err %d\n", prog_fd)) 628 goto out_destroy_skel; 629 keys_fd = bpf_map__fd(skel->maps.last_dissection); 630 if (CHECK(keys_fd < 0, "bpf_map__fd", "err %d\n", keys_fd)) 631 goto out_destroy_skel; 632 err = init_prog_array(skel->obj, skel->maps.jmp_table); 633 if (CHECK(err, "init_prog_array", "err %d\n", err)) 634 goto out_destroy_skel; 635 636 for (i = 0; i < ARRAY_SIZE(tests); i++) { 637 struct bpf_flow_keys flow_keys; 638 LIBBPF_OPTS(bpf_test_run_opts, topts, 639 .data_in = &tests[i].pkt, 640 .data_size_in = sizeof(tests[i].pkt), 641 .data_out = &flow_keys, 642 ); 643 static struct bpf_flow_keys ctx = {}; 644 645 if (tests[i].flags) { 646 topts.ctx_in = &ctx; 647 topts.ctx_size_in = sizeof(ctx); 648 ctx.flags = tests[i].flags; 649 } 650 651 err = bpf_prog_test_run_opts(prog_fd, &topts); 652 ASSERT_OK(err, "test_run"); 653 ASSERT_EQ(topts.retval, tests[i].retval, "test_run retval"); 654 655 /* check the resulting flow_keys only if BPF_OK returned */ 656 if (topts.retval != BPF_OK) 657 continue; 658 ASSERT_EQ(topts.data_size_out, sizeof(flow_keys), 659 "test_run data_size_out"); 660 CHECK_FLOW_KEYS(tests[i].name, flow_keys, tests[i].keys); 661 } 662 663 /* Do the same tests but for skb-less flow dissector. 664 * We use a known path in the net/tun driver that calls 665 * eth_get_headlen and we manually export bpf_flow_keys 666 * via BPF map in this case. 667 */ 668 669 tap_fd = create_tap("tap0"); 670 CHECK(tap_fd < 0, "create_tap", "tap_fd %d errno %d\n", tap_fd, errno); 671 err = ifup("tap0"); 672 CHECK(err, "ifup", "err %d errno %d\n", err, errno); 673 674 /* Test direct prog attachment */ 675 test_skb_less_prog_attach(skel, tap_fd); 676 /* Test indirect prog attachment via link */ 677 test_skb_less_link_create(skel, tap_fd); 678 679 close(tap_fd); 680out_destroy_skel: 681 bpf_flow__destroy(skel); 682} 683