1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2020 Intel Corporation. */ 3 4 /* 5 * Some functions in this program are taken from 6 * Linux kernel samples/bpf/xdpsock* and modified 7 * for use. 8 * 9 * See test_xsk.sh for detailed information on test topology 10 * and prerequisite network setup. 11 * 12 * This test program contains two threads, each thread is single socket with 13 * a unique UMEM. It validates in-order packet delivery and packet content 14 * by sending packets to each other. 15 * 16 * Tests Information: 17 * ------------------ 18 * These selftests test AF_XDP SKB and Native/DRV modes using veth 19 * Virtual Ethernet interfaces. 20 * 21 * For each mode, the following tests are run: 22 * a. nopoll - soft-irq processing in run-to-completion mode 23 * b. poll - using poll() syscall 24 * c. Socket Teardown 25 * Create a Tx and a Rx socket, Tx from one socket, Rx on another. Destroy 26 * both sockets, then repeat multiple times. Only nopoll mode is used 27 * d. Bi-directional sockets 28 * Configure sockets as bi-directional tx/rx sockets, sets up fill and 29 * completion rings on each socket, tx/rx in both directions. Only nopoll 30 * mode is used 31 * e. Statistics 32 * Trigger some error conditions and ensure that the appropriate statistics 33 * are incremented. Within this test, the following statistics are tested: 34 * i. rx dropped 35 * Increase the UMEM frame headroom to a value which results in 36 * insufficient space in the rx buffer for both the packet and the headroom. 37 * ii. tx invalid 38 * Set the 'len' field of tx descriptors to an invalid value (umem frame 39 * size + 1). 40 * iii. rx ring full 41 * Reduce the size of the RX ring to a fraction of the fill ring size. 42 * iv. fill queue empty 43 * Do not populate the fill queue and then try to receive pkts. 44 * f. bpf_link resource persistence 45 * Configure sockets at indexes 0 and 1, run a traffic on queue ids 0, 46 * then remove xsk sockets from queue 0 on both veth interfaces and 47 * finally run a traffic on queues ids 1 48 * g. unaligned mode 49 * h. tests for invalid and corner case Tx descriptors so that the correct ones 50 * are discarded and let through, respectively. 51 * i. 2K frame size tests 52 * 53 * Total tests: 12 54 * 55 * Flow: 56 * ----- 57 * - Single process spawns two threads: Tx and Rx 58 * - Each of these two threads attach to a veth interface 59 * - Each thread creates one AF_XDP socket connected to a unique umem for each 60 * veth interface 61 * - Tx thread Transmits a number of packets from veth<xxxx> to veth<yyyy> 62 * - Rx thread verifies if all packets were received and delivered in-order, 63 * and have the right content 64 * 65 * Enable/disable packet dump mode: 66 * -------------------------- 67 * To enable L2 - L4 headers and payload dump of each packet on STDOUT, add 68 * parameter -D to params array in test_xsk.sh, i.e. params=("-S" "-D") 69 */ 70 71 #define _GNU_SOURCE 72 #include <fcntl.h> 73 #include <errno.h> 74 #include <getopt.h> 75 #include <asm/barrier.h> 76 #include <linux/if_link.h> 77 #include <linux/if_ether.h> 78 #include <linux/ip.h> 79 #include <linux/udp.h> 80 #include <arpa/inet.h> 81 #include <net/if.h> 82 #include <locale.h> 83 #include <poll.h> 84 #include <pthread.h> 85 #include <signal.h> 86 #include <stdbool.h> 87 #include <stdio.h> 88 #include <stdlib.h> 89 #include <string.h> 90 #include <stddef.h> 91 #include <sys/mman.h> 92 #include <sys/socket.h> 93 #include <sys/time.h> 94 #include <sys/types.h> 95 #include <sys/queue.h> 96 #include <time.h> 97 #include <unistd.h> 98 #include <stdatomic.h> 99 #include "xsk.h" 100 #include "xskxceiver.h" 101 #include <bpf/bpf.h> 102 #include <linux/filter.h> 103 #include "../kselftest.h" 104 105 static const char *MAC1 = "\x00\x0A\x56\x9E\xEE\x62"; 106 static const char *MAC2 = "\x00\x0A\x56\x9E\xEE\x61"; 107 static const char *IP1 = "192.168.100.162"; 108 static const char *IP2 = "192.168.100.161"; 109 static const u16 UDP_PORT1 = 2020; 110 static const u16 UDP_PORT2 = 2121; 111 112 static void __exit_with_error(int error, const char *file, const char *func, int line) 113 { 114 ksft_test_result_fail("[%s:%s:%i]: ERROR: %d/\"%s\"\n", file, func, line, error, 115 strerror(error)); 116 ksft_exit_xfail(); 117 } 118 119 #define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__) 120 #define busy_poll_string(test) (test)->ifobj_tx->busy_poll ? "BUSY-POLL " : "" 121 static char *mode_string(struct test_spec *test) 122 { 123 switch (test->mode) { 124 case TEST_MODE_SKB: 125 return "SKB"; 126 case TEST_MODE_DRV: 127 return "DRV"; 128 case TEST_MODE_ZC: 129 return "ZC"; 130 default: 131 return "BOGUS"; 132 } 133 } 134 135 static void report_failure(struct test_spec *test) 136 { 137 if (test->fail) 138 return; 139 140 ksft_test_result_fail("FAIL: %s %s%s\n", mode_string(test), busy_poll_string(test), 141 test->name); 142 test->fail = true; 143 } 144 145 static void memset32_htonl(void *dest, u32 val, u32 size) 146 { 147 u32 *ptr = (u32 *)dest; 148 int i; 149 150 val = htonl(val); 151 152 for (i = 0; i < (size & (~0x3)); i += 4) 153 ptr[i >> 2] = val; 154 } 155 156 /* 157 * Fold a partial checksum 158 * This function code has been taken from 159 * Linux kernel include/asm-generic/checksum.h 160 */ 161 static __u16 csum_fold(__u32 csum) 162 { 163 u32 sum = (__force u32)csum; 164 165 sum = (sum & 0xffff) + (sum >> 16); 166 sum = (sum & 0xffff) + (sum >> 16); 167 return (__force __u16)~sum; 168 } 169 170 /* 171 * This function code has been taken from 172 * Linux kernel lib/checksum.c 173 */ 174 static u32 from64to32(u64 x) 175 { 176 /* add up 32-bit and 32-bit for 32+c bit */ 177 x = (x & 0xffffffff) + (x >> 32); 178 /* add up carry.. */ 179 x = (x & 0xffffffff) + (x >> 32); 180 return (u32)x; 181 } 182 183 /* 184 * This function code has been taken from 185 * Linux kernel lib/checksum.c 186 */ 187 static __u32 csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __u32 sum) 188 { 189 unsigned long long s = (__force u32)sum; 190 191 s += (__force u32)saddr; 192 s += (__force u32)daddr; 193 #ifdef __BIG_ENDIAN__ 194 s += proto + len; 195 #else 196 s += (proto + len) << 8; 197 #endif 198 return (__force __u32)from64to32(s); 199 } 200 201 /* 202 * This function has been taken from 203 * Linux kernel include/asm-generic/checksum.h 204 */ 205 static __u16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len, __u8 proto, __u32 sum) 206 { 207 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); 208 } 209 210 static u16 udp_csum(u32 saddr, u32 daddr, u32 len, u8 proto, u16 *udp_pkt) 211 { 212 u32 csum = 0; 213 u32 cnt = 0; 214 215 /* udp hdr and data */ 216 for (; cnt < len; cnt += 2) 217 csum += udp_pkt[cnt >> 1]; 218 219 return csum_tcpudp_magic(saddr, daddr, len, proto, csum); 220 } 221 222 static void gen_eth_hdr(struct ifobject *ifobject, struct ethhdr *eth_hdr) 223 { 224 memcpy(eth_hdr->h_dest, ifobject->dst_mac, ETH_ALEN); 225 memcpy(eth_hdr->h_source, ifobject->src_mac, ETH_ALEN); 226 eth_hdr->h_proto = htons(ETH_P_IP); 227 } 228 229 static void gen_ip_hdr(struct ifobject *ifobject, struct iphdr *ip_hdr) 230 { 231 ip_hdr->version = IP_PKT_VER; 232 ip_hdr->ihl = 0x5; 233 ip_hdr->tos = IP_PKT_TOS; 234 ip_hdr->tot_len = htons(IP_PKT_SIZE); 235 ip_hdr->id = 0; 236 ip_hdr->frag_off = 0; 237 ip_hdr->ttl = IPDEFTTL; 238 ip_hdr->protocol = IPPROTO_UDP; 239 ip_hdr->saddr = ifobject->src_ip; 240 ip_hdr->daddr = ifobject->dst_ip; 241 ip_hdr->check = 0; 242 } 243 244 static void gen_udp_hdr(u32 payload, void *pkt, struct ifobject *ifobject, 245 struct udphdr *udp_hdr) 246 { 247 udp_hdr->source = htons(ifobject->src_port); 248 udp_hdr->dest = htons(ifobject->dst_port); 249 udp_hdr->len = htons(UDP_PKT_SIZE); 250 memset32_htonl(pkt + PKT_HDR_SIZE, payload, UDP_PKT_DATA_SIZE); 251 } 252 253 static bool is_umem_valid(struct ifobject *ifobj) 254 { 255 return !!ifobj->umem->umem; 256 } 257 258 static void gen_udp_csum(struct udphdr *udp_hdr, struct iphdr *ip_hdr) 259 { 260 udp_hdr->check = 0; 261 udp_hdr->check = 262 udp_csum(ip_hdr->saddr, ip_hdr->daddr, UDP_PKT_SIZE, IPPROTO_UDP, (u16 *)udp_hdr); 263 } 264 265 static u32 mode_to_xdp_flags(enum test_mode mode) 266 { 267 return (mode == TEST_MODE_SKB) ? XDP_FLAGS_SKB_MODE : XDP_FLAGS_DRV_MODE; 268 } 269 270 static int xsk_configure_umem(struct xsk_umem_info *umem, void *buffer, u64 size) 271 { 272 struct xsk_umem_config cfg = { 273 .fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS, 274 .comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS, 275 .frame_size = umem->frame_size, 276 .frame_headroom = umem->frame_headroom, 277 .flags = XSK_UMEM__DEFAULT_FLAGS 278 }; 279 int ret; 280 281 if (umem->unaligned_mode) 282 cfg.flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG; 283 284 ret = xsk_umem__create(&umem->umem, buffer, size, 285 &umem->fq, &umem->cq, &cfg); 286 if (ret) 287 return ret; 288 289 umem->buffer = buffer; 290 return 0; 291 } 292 293 static void enable_busy_poll(struct xsk_socket_info *xsk) 294 { 295 int sock_opt; 296 297 sock_opt = 1; 298 if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_PREFER_BUSY_POLL, 299 (void *)&sock_opt, sizeof(sock_opt)) < 0) 300 exit_with_error(errno); 301 302 sock_opt = 20; 303 if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL, 304 (void *)&sock_opt, sizeof(sock_opt)) < 0) 305 exit_with_error(errno); 306 307 sock_opt = BATCH_SIZE; 308 if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL_BUDGET, 309 (void *)&sock_opt, sizeof(sock_opt)) < 0) 310 exit_with_error(errno); 311 } 312 313 static int __xsk_configure_socket(struct xsk_socket_info *xsk, struct xsk_umem_info *umem, 314 struct ifobject *ifobject, bool shared) 315 { 316 struct xsk_socket_config cfg = {}; 317 struct xsk_ring_cons *rxr; 318 struct xsk_ring_prod *txr; 319 320 xsk->umem = umem; 321 cfg.rx_size = xsk->rxqsize; 322 cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS; 323 cfg.bind_flags = ifobject->bind_flags; 324 if (shared) 325 cfg.bind_flags |= XDP_SHARED_UMEM; 326 327 txr = ifobject->tx_on ? &xsk->tx : NULL; 328 rxr = ifobject->rx_on ? &xsk->rx : NULL; 329 return xsk_socket__create(&xsk->xsk, ifobject->ifindex, 0, umem->umem, rxr, txr, &cfg); 330 } 331 332 static bool ifobj_zc_avail(struct ifobject *ifobject) 333 { 334 size_t umem_sz = DEFAULT_UMEM_BUFFERS * XSK_UMEM__DEFAULT_FRAME_SIZE; 335 int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE; 336 struct xsk_socket_info *xsk; 337 struct xsk_umem_info *umem; 338 bool zc_avail = false; 339 void *bufs; 340 int ret; 341 342 bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0); 343 if (bufs == MAP_FAILED) 344 exit_with_error(errno); 345 346 umem = calloc(1, sizeof(struct xsk_umem_info)); 347 if (!umem) { 348 munmap(bufs, umem_sz); 349 exit_with_error(ENOMEM); 350 } 351 umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE; 352 ret = xsk_configure_umem(umem, bufs, umem_sz); 353 if (ret) 354 exit_with_error(-ret); 355 356 xsk = calloc(1, sizeof(struct xsk_socket_info)); 357 if (!xsk) 358 goto out; 359 ifobject->xdp_flags = XDP_FLAGS_DRV_MODE; 360 ifobject->bind_flags = XDP_USE_NEED_WAKEUP | XDP_ZEROCOPY; 361 ifobject->rx_on = true; 362 xsk->rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS; 363 ret = __xsk_configure_socket(xsk, umem, ifobject, false); 364 if (!ret) 365 zc_avail = true; 366 367 xsk_socket__delete(xsk->xsk); 368 free(xsk); 369 out: 370 munmap(umem->buffer, umem_sz); 371 xsk_umem__delete(umem->umem); 372 free(umem); 373 return zc_avail; 374 } 375 376 static struct option long_options[] = { 377 {"interface", required_argument, 0, 'i'}, 378 {"busy-poll", no_argument, 0, 'b'}, 379 {"dump-pkts", no_argument, 0, 'D'}, 380 {"verbose", no_argument, 0, 'v'}, 381 {0, 0, 0, 0} 382 }; 383 384 static void usage(const char *prog) 385 { 386 const char *str = 387 " Usage: %s [OPTIONS]\n" 388 " Options:\n" 389 " -i, --interface Use interface\n" 390 " -D, --dump-pkts Dump packets L2 - L5\n" 391 " -v, --verbose Verbose output\n" 392 " -b, --busy-poll Enable busy poll\n"; 393 394 ksft_print_msg(str, prog); 395 } 396 397 static bool validate_interface(struct ifobject *ifobj) 398 { 399 if (!strcmp(ifobj->ifname, "")) 400 return false; 401 return true; 402 } 403 404 static void parse_command_line(struct ifobject *ifobj_tx, struct ifobject *ifobj_rx, int argc, 405 char **argv) 406 { 407 struct ifobject *ifobj; 408 u32 interface_nb = 0; 409 int option_index, c; 410 411 opterr = 0; 412 413 for (;;) { 414 c = getopt_long(argc, argv, "i:Dvb", long_options, &option_index); 415 if (c == -1) 416 break; 417 418 switch (c) { 419 case 'i': 420 if (interface_nb == 0) 421 ifobj = ifobj_tx; 422 else if (interface_nb == 1) 423 ifobj = ifobj_rx; 424 else 425 break; 426 427 memcpy(ifobj->ifname, optarg, 428 min_t(size_t, MAX_INTERFACE_NAME_CHARS, strlen(optarg))); 429 430 ifobj->ifindex = if_nametoindex(ifobj->ifname); 431 if (!ifobj->ifindex) 432 exit_with_error(errno); 433 434 interface_nb++; 435 break; 436 case 'D': 437 opt_pkt_dump = true; 438 break; 439 case 'v': 440 opt_verbose = true; 441 break; 442 case 'b': 443 ifobj_tx->busy_poll = true; 444 ifobj_rx->busy_poll = true; 445 break; 446 default: 447 usage(basename(argv[0])); 448 ksft_exit_xfail(); 449 } 450 } 451 } 452 453 static void __test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx, 454 struct ifobject *ifobj_rx) 455 { 456 u32 i, j; 457 458 for (i = 0; i < MAX_INTERFACES; i++) { 459 struct ifobject *ifobj = i ? ifobj_rx : ifobj_tx; 460 461 ifobj->xsk = &ifobj->xsk_arr[0]; 462 ifobj->use_poll = false; 463 ifobj->use_fill_ring = true; 464 ifobj->release_rx = true; 465 ifobj->validation_func = NULL; 466 467 if (i == 0) { 468 ifobj->rx_on = false; 469 ifobj->tx_on = true; 470 ifobj->pkt_stream = test->tx_pkt_stream_default; 471 } else { 472 ifobj->rx_on = true; 473 ifobj->tx_on = false; 474 ifobj->pkt_stream = test->rx_pkt_stream_default; 475 } 476 477 memset(ifobj->umem, 0, sizeof(*ifobj->umem)); 478 ifobj->umem->num_frames = DEFAULT_UMEM_BUFFERS; 479 ifobj->umem->frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE; 480 if (ifobj->shared_umem && ifobj->rx_on) 481 ifobj->umem->base_addr = DEFAULT_UMEM_BUFFERS * 482 XSK_UMEM__DEFAULT_FRAME_SIZE; 483 484 for (j = 0; j < MAX_SOCKETS; j++) { 485 memset(&ifobj->xsk_arr[j], 0, sizeof(ifobj->xsk_arr[j])); 486 ifobj->xsk_arr[j].rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS; 487 } 488 } 489 490 test->ifobj_tx = ifobj_tx; 491 test->ifobj_rx = ifobj_rx; 492 test->current_step = 0; 493 test->total_steps = 1; 494 test->nb_sockets = 1; 495 test->fail = false; 496 } 497 498 static void test_spec_init(struct test_spec *test, struct ifobject *ifobj_tx, 499 struct ifobject *ifobj_rx, enum test_mode mode) 500 { 501 struct pkt_stream *tx_pkt_stream; 502 struct pkt_stream *rx_pkt_stream; 503 u32 i; 504 505 tx_pkt_stream = test->tx_pkt_stream_default; 506 rx_pkt_stream = test->rx_pkt_stream_default; 507 memset(test, 0, sizeof(*test)); 508 test->tx_pkt_stream_default = tx_pkt_stream; 509 test->rx_pkt_stream_default = rx_pkt_stream; 510 511 for (i = 0; i < MAX_INTERFACES; i++) { 512 struct ifobject *ifobj = i ? ifobj_rx : ifobj_tx; 513 514 ifobj->bind_flags = XDP_USE_NEED_WAKEUP; 515 if (mode == TEST_MODE_ZC) 516 ifobj->bind_flags |= XDP_ZEROCOPY; 517 else 518 ifobj->bind_flags |= XDP_COPY; 519 } 520 521 test->mode = mode; 522 __test_spec_init(test, ifobj_tx, ifobj_rx); 523 } 524 525 static void test_spec_reset(struct test_spec *test) 526 { 527 __test_spec_init(test, test->ifobj_tx, test->ifobj_rx); 528 } 529 530 static void test_spec_set_name(struct test_spec *test, const char *name) 531 { 532 strncpy(test->name, name, MAX_TEST_NAME_SIZE); 533 } 534 535 static void pkt_stream_reset(struct pkt_stream *pkt_stream) 536 { 537 if (pkt_stream) 538 pkt_stream->rx_pkt_nb = 0; 539 } 540 541 static struct pkt *pkt_stream_get_pkt(struct pkt_stream *pkt_stream, u32 pkt_nb) 542 { 543 if (pkt_nb >= pkt_stream->nb_pkts) 544 return NULL; 545 546 return &pkt_stream->pkts[pkt_nb]; 547 } 548 549 static struct pkt *pkt_stream_get_next_rx_pkt(struct pkt_stream *pkt_stream, u32 *pkts_sent) 550 { 551 while (pkt_stream->rx_pkt_nb < pkt_stream->nb_pkts) { 552 (*pkts_sent)++; 553 if (pkt_stream->pkts[pkt_stream->rx_pkt_nb].valid) 554 return &pkt_stream->pkts[pkt_stream->rx_pkt_nb++]; 555 pkt_stream->rx_pkt_nb++; 556 } 557 return NULL; 558 } 559 560 static void pkt_stream_delete(struct pkt_stream *pkt_stream) 561 { 562 free(pkt_stream->pkts); 563 free(pkt_stream); 564 } 565 566 static void pkt_stream_restore_default(struct test_spec *test) 567 { 568 struct pkt_stream *tx_pkt_stream = test->ifobj_tx->pkt_stream; 569 struct pkt_stream *rx_pkt_stream = test->ifobj_rx->pkt_stream; 570 571 if (tx_pkt_stream != test->tx_pkt_stream_default) { 572 pkt_stream_delete(test->ifobj_tx->pkt_stream); 573 test->ifobj_tx->pkt_stream = test->tx_pkt_stream_default; 574 } 575 576 if (rx_pkt_stream != test->rx_pkt_stream_default) { 577 pkt_stream_delete(test->ifobj_rx->pkt_stream); 578 test->ifobj_rx->pkt_stream = test->rx_pkt_stream_default; 579 } 580 } 581 582 static struct pkt_stream *__pkt_stream_alloc(u32 nb_pkts) 583 { 584 struct pkt_stream *pkt_stream; 585 586 pkt_stream = calloc(1, sizeof(*pkt_stream)); 587 if (!pkt_stream) 588 return NULL; 589 590 pkt_stream->pkts = calloc(nb_pkts, sizeof(*pkt_stream->pkts)); 591 if (!pkt_stream->pkts) { 592 free(pkt_stream); 593 return NULL; 594 } 595 596 pkt_stream->nb_pkts = nb_pkts; 597 return pkt_stream; 598 } 599 600 static void pkt_set(struct xsk_umem_info *umem, struct pkt *pkt, u64 addr, u32 len) 601 { 602 pkt->addr = addr + umem->base_addr; 603 pkt->len = len; 604 if (len > umem->frame_size - XDP_PACKET_HEADROOM - MIN_PKT_SIZE * 2 - umem->frame_headroom) 605 pkt->valid = false; 606 else 607 pkt->valid = true; 608 } 609 610 static struct pkt_stream *pkt_stream_generate(struct xsk_umem_info *umem, u32 nb_pkts, u32 pkt_len) 611 { 612 struct pkt_stream *pkt_stream; 613 u32 i; 614 615 pkt_stream = __pkt_stream_alloc(nb_pkts); 616 if (!pkt_stream) 617 exit_with_error(ENOMEM); 618 619 pkt_stream->nb_pkts = nb_pkts; 620 for (i = 0; i < nb_pkts; i++) { 621 pkt_set(umem, &pkt_stream->pkts[i], (i % umem->num_frames) * umem->frame_size, 622 pkt_len); 623 pkt_stream->pkts[i].payload = i; 624 } 625 626 return pkt_stream; 627 } 628 629 static struct pkt_stream *pkt_stream_clone(struct xsk_umem_info *umem, 630 struct pkt_stream *pkt_stream) 631 { 632 return pkt_stream_generate(umem, pkt_stream->nb_pkts, pkt_stream->pkts[0].len); 633 } 634 635 static void pkt_stream_replace(struct test_spec *test, u32 nb_pkts, u32 pkt_len) 636 { 637 struct pkt_stream *pkt_stream; 638 639 pkt_stream = pkt_stream_generate(test->ifobj_tx->umem, nb_pkts, pkt_len); 640 test->ifobj_tx->pkt_stream = pkt_stream; 641 pkt_stream = pkt_stream_generate(test->ifobj_rx->umem, nb_pkts, pkt_len); 642 test->ifobj_rx->pkt_stream = pkt_stream; 643 } 644 645 static void __pkt_stream_replace_half(struct ifobject *ifobj, u32 pkt_len, 646 int offset) 647 { 648 struct xsk_umem_info *umem = ifobj->umem; 649 struct pkt_stream *pkt_stream; 650 u32 i; 651 652 pkt_stream = pkt_stream_clone(umem, ifobj->pkt_stream); 653 for (i = 1; i < ifobj->pkt_stream->nb_pkts; i += 2) 654 pkt_set(umem, &pkt_stream->pkts[i], 655 (i % umem->num_frames) * umem->frame_size + offset, pkt_len); 656 657 ifobj->pkt_stream = pkt_stream; 658 } 659 660 static void pkt_stream_replace_half(struct test_spec *test, u32 pkt_len, int offset) 661 { 662 __pkt_stream_replace_half(test->ifobj_tx, pkt_len, offset); 663 __pkt_stream_replace_half(test->ifobj_rx, pkt_len, offset); 664 } 665 666 static void pkt_stream_receive_half(struct test_spec *test) 667 { 668 struct xsk_umem_info *umem = test->ifobj_rx->umem; 669 struct pkt_stream *pkt_stream = test->ifobj_tx->pkt_stream; 670 u32 i; 671 672 test->ifobj_rx->pkt_stream = pkt_stream_generate(umem, pkt_stream->nb_pkts, 673 pkt_stream->pkts[0].len); 674 pkt_stream = test->ifobj_rx->pkt_stream; 675 for (i = 1; i < pkt_stream->nb_pkts; i += 2) 676 pkt_stream->pkts[i].valid = false; 677 } 678 679 static struct pkt *pkt_generate(struct ifobject *ifobject, u32 pkt_nb) 680 { 681 struct pkt *pkt = pkt_stream_get_pkt(ifobject->pkt_stream, pkt_nb); 682 struct udphdr *udp_hdr; 683 struct ethhdr *eth_hdr; 684 struct iphdr *ip_hdr; 685 void *data; 686 687 if (!pkt) 688 return NULL; 689 if (!pkt->valid || pkt->len < MIN_PKT_SIZE) 690 return pkt; 691 692 data = xsk_umem__get_data(ifobject->umem->buffer, pkt->addr); 693 udp_hdr = (struct udphdr *)(data + sizeof(struct ethhdr) + sizeof(struct iphdr)); 694 ip_hdr = (struct iphdr *)(data + sizeof(struct ethhdr)); 695 eth_hdr = (struct ethhdr *)data; 696 697 gen_udp_hdr(pkt_nb, data, ifobject, udp_hdr); 698 gen_ip_hdr(ifobject, ip_hdr); 699 gen_udp_csum(udp_hdr, ip_hdr); 700 gen_eth_hdr(ifobject, eth_hdr); 701 702 return pkt; 703 } 704 705 static void __pkt_stream_generate_custom(struct ifobject *ifobj, 706 struct pkt *pkts, u32 nb_pkts) 707 { 708 struct pkt_stream *pkt_stream; 709 u32 i; 710 711 pkt_stream = __pkt_stream_alloc(nb_pkts); 712 if (!pkt_stream) 713 exit_with_error(ENOMEM); 714 715 for (i = 0; i < nb_pkts; i++) { 716 pkt_stream->pkts[i].addr = pkts[i].addr + ifobj->umem->base_addr; 717 pkt_stream->pkts[i].len = pkts[i].len; 718 pkt_stream->pkts[i].payload = i; 719 pkt_stream->pkts[i].valid = pkts[i].valid; 720 } 721 722 ifobj->pkt_stream = pkt_stream; 723 } 724 725 static void pkt_stream_generate_custom(struct test_spec *test, struct pkt *pkts, u32 nb_pkts) 726 { 727 __pkt_stream_generate_custom(test->ifobj_tx, pkts, nb_pkts); 728 __pkt_stream_generate_custom(test->ifobj_rx, pkts, nb_pkts); 729 } 730 731 static void pkt_dump(void *pkt, u32 len) 732 { 733 char s[INET_ADDRSTRLEN]; 734 struct ethhdr *ethhdr; 735 struct udphdr *udphdr; 736 struct iphdr *iphdr; 737 u32 payload, i; 738 739 ethhdr = pkt; 740 iphdr = pkt + sizeof(*ethhdr); 741 udphdr = pkt + sizeof(*ethhdr) + sizeof(*iphdr); 742 743 /*extract L2 frame */ 744 fprintf(stdout, "DEBUG>> L2: dst mac: "); 745 for (i = 0; i < ETH_ALEN; i++) 746 fprintf(stdout, "%02X", ethhdr->h_dest[i]); 747 748 fprintf(stdout, "\nDEBUG>> L2: src mac: "); 749 for (i = 0; i < ETH_ALEN; i++) 750 fprintf(stdout, "%02X", ethhdr->h_source[i]); 751 752 /*extract L3 frame */ 753 fprintf(stdout, "\nDEBUG>> L3: ip_hdr->ihl: %02X\n", iphdr->ihl); 754 fprintf(stdout, "DEBUG>> L3: ip_hdr->saddr: %s\n", 755 inet_ntop(AF_INET, &iphdr->saddr, s, sizeof(s))); 756 fprintf(stdout, "DEBUG>> L3: ip_hdr->daddr: %s\n", 757 inet_ntop(AF_INET, &iphdr->daddr, s, sizeof(s))); 758 /*extract L4 frame */ 759 fprintf(stdout, "DEBUG>> L4: udp_hdr->src: %d\n", ntohs(udphdr->source)); 760 fprintf(stdout, "DEBUG>> L4: udp_hdr->dst: %d\n", ntohs(udphdr->dest)); 761 /*extract L5 frame */ 762 payload = ntohl(*((u32 *)(pkt + PKT_HDR_SIZE))); 763 764 fprintf(stdout, "DEBUG>> L5: payload: %d\n", payload); 765 fprintf(stdout, "---------------------------------------\n"); 766 } 767 768 static bool is_offset_correct(struct xsk_umem_info *umem, struct pkt_stream *pkt_stream, u64 addr, 769 u64 pkt_stream_addr) 770 { 771 u32 headroom = umem->unaligned_mode ? 0 : umem->frame_headroom; 772 u32 offset = addr % umem->frame_size, expected_offset = 0; 773 774 if (!pkt_stream->use_addr_for_fill) 775 pkt_stream_addr = 0; 776 777 expected_offset += (pkt_stream_addr + headroom + XDP_PACKET_HEADROOM) % umem->frame_size; 778 779 if (offset == expected_offset) 780 return true; 781 782 ksft_print_msg("[%s] expected [%u], got [%u]\n", __func__, expected_offset, offset); 783 return false; 784 } 785 786 static bool is_pkt_valid(struct pkt *pkt, void *buffer, u64 addr, u32 len) 787 { 788 void *data = xsk_umem__get_data(buffer, addr); 789 struct iphdr *iphdr = (struct iphdr *)(data + sizeof(struct ethhdr)); 790 791 if (!pkt) { 792 ksft_print_msg("[%s] too many packets received\n", __func__); 793 return false; 794 } 795 796 if (len < MIN_PKT_SIZE || pkt->len < MIN_PKT_SIZE) { 797 /* Do not try to verify packets that are smaller than minimum size. */ 798 return true; 799 } 800 801 if (pkt->len != len) { 802 ksft_print_msg("[%s] expected length [%d], got length [%d]\n", 803 __func__, pkt->len, len); 804 return false; 805 } 806 807 if (iphdr->version == IP_PKT_VER && iphdr->tos == IP_PKT_TOS) { 808 u32 seqnum = ntohl(*((u32 *)(data + PKT_HDR_SIZE))); 809 810 if (opt_pkt_dump) 811 pkt_dump(data, PKT_SIZE); 812 813 if (pkt->payload != seqnum) { 814 ksft_print_msg("[%s] expected seqnum [%d], got seqnum [%d]\n", 815 __func__, pkt->payload, seqnum); 816 return false; 817 } 818 } else { 819 ksft_print_msg("Invalid frame received: "); 820 ksft_print_msg("[IP_PKT_VER: %02X], [IP_PKT_TOS: %02X]\n", iphdr->version, 821 iphdr->tos); 822 return false; 823 } 824 825 return true; 826 } 827 828 static void kick_tx(struct xsk_socket_info *xsk) 829 { 830 int ret; 831 832 ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0); 833 if (ret >= 0) 834 return; 835 if (errno == ENOBUFS || errno == EAGAIN || errno == EBUSY || errno == ENETDOWN) { 836 usleep(100); 837 return; 838 } 839 exit_with_error(errno); 840 } 841 842 static void kick_rx(struct xsk_socket_info *xsk) 843 { 844 int ret; 845 846 ret = recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL); 847 if (ret < 0) 848 exit_with_error(errno); 849 } 850 851 static int complete_pkts(struct xsk_socket_info *xsk, int batch_size) 852 { 853 unsigned int rcvd; 854 u32 idx; 855 856 if (xsk_ring_prod__needs_wakeup(&xsk->tx)) 857 kick_tx(xsk); 858 859 rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx); 860 if (rcvd) { 861 if (rcvd > xsk->outstanding_tx) { 862 u64 addr = *xsk_ring_cons__comp_addr(&xsk->umem->cq, idx + rcvd - 1); 863 864 ksft_print_msg("[%s] Too many packets completed\n", __func__); 865 ksft_print_msg("Last completion address: %llx\n", addr); 866 return TEST_FAILURE; 867 } 868 869 xsk_ring_cons__release(&xsk->umem->cq, rcvd); 870 xsk->outstanding_tx -= rcvd; 871 } 872 873 return TEST_PASS; 874 } 875 876 static int receive_pkts(struct test_spec *test, struct pollfd *fds) 877 { 878 struct timeval tv_end, tv_now, tv_timeout = {THREAD_TMOUT, 0}; 879 struct pkt_stream *pkt_stream = test->ifobj_rx->pkt_stream; 880 u32 idx_rx = 0, idx_fq = 0, rcvd, i, pkts_sent = 0; 881 struct xsk_socket_info *xsk = test->ifobj_rx->xsk; 882 struct ifobject *ifobj = test->ifobj_rx; 883 struct xsk_umem_info *umem = xsk->umem; 884 struct pkt *pkt; 885 int ret; 886 887 ret = gettimeofday(&tv_now, NULL); 888 if (ret) 889 exit_with_error(errno); 890 timeradd(&tv_now, &tv_timeout, &tv_end); 891 892 pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent); 893 while (pkt) { 894 ret = gettimeofday(&tv_now, NULL); 895 if (ret) 896 exit_with_error(errno); 897 if (timercmp(&tv_now, &tv_end, >)) { 898 ksft_print_msg("ERROR: [%s] Receive loop timed out\n", __func__); 899 return TEST_FAILURE; 900 } 901 902 kick_rx(xsk); 903 if (ifobj->use_poll) { 904 ret = poll(fds, 1, POLL_TMOUT); 905 if (ret < 0) 906 exit_with_error(errno); 907 908 if (!ret) { 909 if (!is_umem_valid(test->ifobj_tx)) 910 return TEST_PASS; 911 912 ksft_print_msg("ERROR: [%s] Poll timed out\n", __func__); 913 return TEST_FAILURE; 914 915 } 916 917 if (!(fds->revents & POLLIN)) 918 continue; 919 } 920 921 rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx); 922 if (!rcvd) 923 continue; 924 925 if (ifobj->use_fill_ring) { 926 ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq); 927 while (ret != rcvd) { 928 if (ret < 0) 929 exit_with_error(-ret); 930 if (xsk_ring_prod__needs_wakeup(&umem->fq)) { 931 ret = poll(fds, 1, POLL_TMOUT); 932 if (ret < 0) 933 exit_with_error(errno); 934 } 935 ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq); 936 } 937 } 938 939 for (i = 0; i < rcvd; i++) { 940 const struct xdp_desc *desc = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++); 941 u64 addr = desc->addr, orig; 942 943 orig = xsk_umem__extract_addr(addr); 944 addr = xsk_umem__add_offset_to_addr(addr); 945 946 if (!is_pkt_valid(pkt, umem->buffer, addr, desc->len) || 947 !is_offset_correct(umem, pkt_stream, addr, pkt->addr)) 948 return TEST_FAILURE; 949 950 if (ifobj->use_fill_ring) 951 *xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) = orig; 952 pkt = pkt_stream_get_next_rx_pkt(pkt_stream, &pkts_sent); 953 } 954 955 if (ifobj->use_fill_ring) 956 xsk_ring_prod__submit(&umem->fq, rcvd); 957 if (ifobj->release_rx) 958 xsk_ring_cons__release(&xsk->rx, rcvd); 959 960 pthread_mutex_lock(&pacing_mutex); 961 pkts_in_flight -= pkts_sent; 962 if (pkts_in_flight < umem->num_frames) 963 pthread_cond_signal(&pacing_cond); 964 pthread_mutex_unlock(&pacing_mutex); 965 pkts_sent = 0; 966 } 967 968 return TEST_PASS; 969 } 970 971 static int __send_pkts(struct ifobject *ifobject, u32 *pkt_nb, struct pollfd *fds, 972 bool timeout) 973 { 974 struct xsk_socket_info *xsk = ifobject->xsk; 975 bool use_poll = ifobject->use_poll; 976 u32 i, idx = 0, valid_pkts = 0; 977 int ret; 978 979 while (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) < BATCH_SIZE) { 980 if (use_poll) { 981 ret = poll(fds, 1, POLL_TMOUT); 982 if (timeout) { 983 if (ret < 0) { 984 ksft_print_msg("ERROR: [%s] Poll error %d\n", 985 __func__, errno); 986 return TEST_FAILURE; 987 } 988 if (ret == 0) 989 return TEST_PASS; 990 break; 991 } 992 if (ret <= 0) { 993 ksft_print_msg("ERROR: [%s] Poll error %d\n", 994 __func__, errno); 995 return TEST_FAILURE; 996 } 997 } 998 999 complete_pkts(xsk, BATCH_SIZE); 1000 } 1001 1002 for (i = 0; i < BATCH_SIZE; i++) { 1003 struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx, idx + i); 1004 struct pkt *pkt = pkt_generate(ifobject, *pkt_nb); 1005 1006 if (!pkt) 1007 break; 1008 1009 tx_desc->addr = pkt->addr; 1010 tx_desc->len = pkt->len; 1011 (*pkt_nb)++; 1012 if (pkt->valid) 1013 valid_pkts++; 1014 } 1015 1016 pthread_mutex_lock(&pacing_mutex); 1017 pkts_in_flight += valid_pkts; 1018 /* pkts_in_flight might be negative if many invalid packets are sent */ 1019 if (pkts_in_flight >= (int)(ifobject->umem->num_frames - BATCH_SIZE)) { 1020 kick_tx(xsk); 1021 pthread_cond_wait(&pacing_cond, &pacing_mutex); 1022 } 1023 pthread_mutex_unlock(&pacing_mutex); 1024 1025 xsk_ring_prod__submit(&xsk->tx, i); 1026 xsk->outstanding_tx += valid_pkts; 1027 1028 if (use_poll) { 1029 ret = poll(fds, 1, POLL_TMOUT); 1030 if (ret <= 0) { 1031 if (ret == 0 && timeout) 1032 return TEST_PASS; 1033 1034 ksft_print_msg("ERROR: [%s] Poll error %d\n", __func__, ret); 1035 return TEST_FAILURE; 1036 } 1037 } 1038 1039 if (!timeout) { 1040 if (complete_pkts(xsk, i)) 1041 return TEST_FAILURE; 1042 1043 usleep(10); 1044 return TEST_PASS; 1045 } 1046 1047 return TEST_CONTINUE; 1048 } 1049 1050 static void wait_for_tx_completion(struct xsk_socket_info *xsk) 1051 { 1052 while (xsk->outstanding_tx) 1053 complete_pkts(xsk, BATCH_SIZE); 1054 } 1055 1056 static int send_pkts(struct test_spec *test, struct ifobject *ifobject) 1057 { 1058 bool timeout = !is_umem_valid(test->ifobj_rx); 1059 struct pollfd fds = { }; 1060 u32 pkt_cnt = 0, ret; 1061 1062 fds.fd = xsk_socket__fd(ifobject->xsk->xsk); 1063 fds.events = POLLOUT; 1064 1065 while (pkt_cnt < ifobject->pkt_stream->nb_pkts) { 1066 ret = __send_pkts(ifobject, &pkt_cnt, &fds, timeout); 1067 if ((ret || test->fail) && !timeout) 1068 return TEST_FAILURE; 1069 else if (ret == TEST_PASS && timeout) 1070 return ret; 1071 } 1072 1073 wait_for_tx_completion(ifobject->xsk); 1074 return TEST_PASS; 1075 } 1076 1077 static int get_xsk_stats(struct xsk_socket *xsk, struct xdp_statistics *stats) 1078 { 1079 int fd = xsk_socket__fd(xsk), err; 1080 socklen_t optlen, expected_len; 1081 1082 optlen = sizeof(*stats); 1083 err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, stats, &optlen); 1084 if (err) { 1085 ksft_print_msg("[%s] getsockopt(XDP_STATISTICS) error %u %s\n", 1086 __func__, -err, strerror(-err)); 1087 return TEST_FAILURE; 1088 } 1089 1090 expected_len = sizeof(struct xdp_statistics); 1091 if (optlen != expected_len) { 1092 ksft_print_msg("[%s] getsockopt optlen error. Expected: %u got: %u\n", 1093 __func__, expected_len, optlen); 1094 return TEST_FAILURE; 1095 } 1096 1097 return TEST_PASS; 1098 } 1099 1100 static int validate_rx_dropped(struct ifobject *ifobject) 1101 { 1102 struct xsk_socket *xsk = ifobject->xsk->xsk; 1103 struct xdp_statistics stats; 1104 int err; 1105 1106 kick_rx(ifobject->xsk); 1107 1108 err = get_xsk_stats(xsk, &stats); 1109 if (err) 1110 return TEST_FAILURE; 1111 1112 if (stats.rx_dropped == ifobject->pkt_stream->nb_pkts / 2) 1113 return TEST_PASS; 1114 1115 return TEST_FAILURE; 1116 } 1117 1118 static int validate_rx_full(struct ifobject *ifobject) 1119 { 1120 struct xsk_socket *xsk = ifobject->xsk->xsk; 1121 struct xdp_statistics stats; 1122 int err; 1123 1124 usleep(1000); 1125 kick_rx(ifobject->xsk); 1126 1127 err = get_xsk_stats(xsk, &stats); 1128 if (err) 1129 return TEST_FAILURE; 1130 1131 if (stats.rx_ring_full) 1132 return TEST_PASS; 1133 1134 return TEST_FAILURE; 1135 } 1136 1137 static int validate_fill_empty(struct ifobject *ifobject) 1138 { 1139 struct xsk_socket *xsk = ifobject->xsk->xsk; 1140 struct xdp_statistics stats; 1141 int err; 1142 1143 usleep(1000); 1144 kick_rx(ifobject->xsk); 1145 1146 err = get_xsk_stats(xsk, &stats); 1147 if (err) 1148 return TEST_FAILURE; 1149 1150 if (stats.rx_fill_ring_empty_descs) 1151 return TEST_PASS; 1152 1153 return TEST_FAILURE; 1154 } 1155 1156 static int validate_tx_invalid_descs(struct ifobject *ifobject) 1157 { 1158 struct xsk_socket *xsk = ifobject->xsk->xsk; 1159 int fd = xsk_socket__fd(xsk); 1160 struct xdp_statistics stats; 1161 socklen_t optlen; 1162 int err; 1163 1164 optlen = sizeof(stats); 1165 err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen); 1166 if (err) { 1167 ksft_print_msg("[%s] getsockopt(XDP_STATISTICS) error %u %s\n", 1168 __func__, -err, strerror(-err)); 1169 return TEST_FAILURE; 1170 } 1171 1172 if (stats.tx_invalid_descs != ifobject->pkt_stream->nb_pkts / 2) { 1173 ksft_print_msg("[%s] tx_invalid_descs incorrect. Got [%u] expected [%u]\n", 1174 __func__, stats.tx_invalid_descs, ifobject->pkt_stream->nb_pkts); 1175 return TEST_FAILURE; 1176 } 1177 1178 return TEST_PASS; 1179 } 1180 1181 static void xsk_configure_socket(struct test_spec *test, struct ifobject *ifobject, 1182 struct xsk_umem_info *umem, bool tx) 1183 { 1184 int i, ret; 1185 1186 for (i = 0; i < test->nb_sockets; i++) { 1187 bool shared = (ifobject->shared_umem && tx) ? true : !!i; 1188 u32 ctr = 0; 1189 1190 while (ctr++ < SOCK_RECONF_CTR) { 1191 ret = __xsk_configure_socket(&ifobject->xsk_arr[i], umem, 1192 ifobject, shared); 1193 if (!ret) 1194 break; 1195 1196 /* Retry if it fails as xsk_socket__create() is asynchronous */ 1197 if (ctr >= SOCK_RECONF_CTR) 1198 exit_with_error(-ret); 1199 usleep(USLEEP_MAX); 1200 } 1201 if (ifobject->busy_poll) 1202 enable_busy_poll(&ifobject->xsk_arr[i]); 1203 } 1204 } 1205 1206 static void thread_common_ops_tx(struct test_spec *test, struct ifobject *ifobject) 1207 { 1208 xsk_configure_socket(test, ifobject, test->ifobj_rx->umem, true); 1209 ifobject->xsk = &ifobject->xsk_arr[0]; 1210 ifobject->xsk_map_fd = test->ifobj_rx->xsk_map_fd; 1211 memcpy(ifobject->umem, test->ifobj_rx->umem, sizeof(struct xsk_umem_info)); 1212 } 1213 1214 static void xsk_populate_fill_ring(struct xsk_umem_info *umem, struct pkt_stream *pkt_stream) 1215 { 1216 u32 idx = 0, i, buffers_to_fill; 1217 int ret; 1218 1219 if (umem->num_frames < XSK_RING_PROD__DEFAULT_NUM_DESCS) 1220 buffers_to_fill = umem->num_frames; 1221 else 1222 buffers_to_fill = XSK_RING_PROD__DEFAULT_NUM_DESCS; 1223 1224 ret = xsk_ring_prod__reserve(&umem->fq, buffers_to_fill, &idx); 1225 if (ret != buffers_to_fill) 1226 exit_with_error(ENOSPC); 1227 for (i = 0; i < buffers_to_fill; i++) { 1228 u64 addr; 1229 1230 if (pkt_stream->use_addr_for_fill) { 1231 struct pkt *pkt = pkt_stream_get_pkt(pkt_stream, i); 1232 1233 if (!pkt) 1234 break; 1235 addr = pkt->addr; 1236 } else { 1237 addr = i * umem->frame_size; 1238 } 1239 1240 *xsk_ring_prod__fill_addr(&umem->fq, idx++) = addr; 1241 } 1242 xsk_ring_prod__submit(&umem->fq, i); 1243 } 1244 1245 static void thread_common_ops(struct test_spec *test, struct ifobject *ifobject) 1246 { 1247 u64 umem_sz = ifobject->umem->num_frames * ifobject->umem->frame_size; 1248 int mmap_flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE; 1249 LIBBPF_OPTS(bpf_xdp_query_opts, opts); 1250 u32 queue_id = 0; 1251 int ret, fd; 1252 void *bufs; 1253 1254 if (ifobject->umem->unaligned_mode) 1255 mmap_flags |= MAP_HUGETLB; 1256 1257 if (ifobject->shared_umem) 1258 umem_sz *= 2; 1259 1260 bufs = mmap(NULL, umem_sz, PROT_READ | PROT_WRITE, mmap_flags, -1, 0); 1261 if (bufs == MAP_FAILED) 1262 exit_with_error(errno); 1263 1264 ret = xsk_configure_umem(ifobject->umem, bufs, umem_sz); 1265 if (ret) 1266 exit_with_error(-ret); 1267 1268 xsk_populate_fill_ring(ifobject->umem, ifobject->pkt_stream); 1269 1270 xsk_configure_socket(test, ifobject, ifobject->umem, false); 1271 1272 ifobject->xsk = &ifobject->xsk_arr[0]; 1273 1274 if (!ifobject->rx_on) 1275 return; 1276 1277 fd = xsk_socket__fd(ifobject->xsk->xsk); 1278 ret = bpf_map_update_elem(ifobject->xsk_map_fd, &queue_id, &fd, 0); 1279 if (ret) 1280 exit_with_error(errno); 1281 } 1282 1283 static void *worker_testapp_validate_tx(void *arg) 1284 { 1285 struct test_spec *test = (struct test_spec *)arg; 1286 struct ifobject *ifobject = test->ifobj_tx; 1287 int err; 1288 1289 if (test->current_step == 1) { 1290 if (!ifobject->shared_umem) 1291 thread_common_ops(test, ifobject); 1292 else 1293 thread_common_ops_tx(test, ifobject); 1294 } 1295 1296 print_verbose("Sending %d packets on interface %s\n", ifobject->pkt_stream->nb_pkts, 1297 ifobject->ifname); 1298 err = send_pkts(test, ifobject); 1299 1300 if (!err && ifobject->validation_func) 1301 err = ifobject->validation_func(ifobject); 1302 if (err) 1303 report_failure(test); 1304 1305 pthread_exit(NULL); 1306 } 1307 1308 static void *worker_testapp_validate_rx(void *arg) 1309 { 1310 struct test_spec *test = (struct test_spec *)arg; 1311 struct ifobject *ifobject = test->ifobj_rx; 1312 int id = 0, err, fd = xsk_socket__fd(ifobject->xsk->xsk); 1313 struct pollfd fds = { }; 1314 u32 queue_id = 0; 1315 1316 if (test->current_step == 1) { 1317 thread_common_ops(test, ifobject); 1318 } else { 1319 bpf_map_delete_elem(ifobject->xsk_map_fd, &id); 1320 err = bpf_map_update_elem(ifobject->xsk_map_fd, &queue_id, &fd, 0); 1321 if (err) { 1322 printf("Error: Failed to update xskmap, error %s\n", strerror(err)); 1323 exit_with_error(err); 1324 } 1325 } 1326 1327 fds.fd = xsk_socket__fd(ifobject->xsk->xsk); 1328 fds.events = POLLIN; 1329 1330 pthread_barrier_wait(&barr); 1331 1332 err = receive_pkts(test, &fds); 1333 1334 if (!err && ifobject->validation_func) 1335 err = ifobject->validation_func(ifobject); 1336 if (err) { 1337 report_failure(test); 1338 pthread_mutex_lock(&pacing_mutex); 1339 pthread_cond_signal(&pacing_cond); 1340 pthread_mutex_unlock(&pacing_mutex); 1341 } 1342 1343 pthread_exit(NULL); 1344 } 1345 1346 static void testapp_clean_xsk_umem(struct ifobject *ifobj) 1347 { 1348 u64 umem_sz = ifobj->umem->num_frames * ifobj->umem->frame_size; 1349 1350 if (ifobj->shared_umem) 1351 umem_sz *= 2; 1352 1353 xsk_umem__delete(ifobj->umem->umem); 1354 munmap(ifobj->umem->buffer, umem_sz); 1355 } 1356 1357 static void handler(int signum) 1358 { 1359 pthread_exit(NULL); 1360 } 1361 1362 static int testapp_validate_traffic_single_thread(struct test_spec *test, struct ifobject *ifobj, 1363 enum test_type type) 1364 { 1365 bool old_shared_umem = ifobj->shared_umem; 1366 pthread_t t0; 1367 1368 if (pthread_barrier_init(&barr, NULL, 2)) 1369 exit_with_error(errno); 1370 1371 test->current_step++; 1372 if (type == TEST_TYPE_POLL_RXQ_TMOUT) 1373 pkt_stream_reset(ifobj->pkt_stream); 1374 pkts_in_flight = 0; 1375 1376 test->ifobj_rx->shared_umem = false; 1377 test->ifobj_tx->shared_umem = false; 1378 1379 signal(SIGUSR1, handler); 1380 /* Spawn thread */ 1381 pthread_create(&t0, NULL, ifobj->func_ptr, test); 1382 1383 if (type != TEST_TYPE_POLL_TXQ_TMOUT) 1384 pthread_barrier_wait(&barr); 1385 1386 if (pthread_barrier_destroy(&barr)) 1387 exit_with_error(errno); 1388 1389 pthread_kill(t0, SIGUSR1); 1390 pthread_join(t0, NULL); 1391 1392 if (test->total_steps == test->current_step || test->fail) { 1393 u32 queue_id = 0; 1394 1395 xsk_socket__delete(ifobj->xsk->xsk); 1396 bpf_map_delete_elem(ifobj->xsk_map_fd, &queue_id); 1397 testapp_clean_xsk_umem(ifobj); 1398 } 1399 1400 test->ifobj_rx->shared_umem = old_shared_umem; 1401 test->ifobj_tx->shared_umem = old_shared_umem; 1402 1403 return !!test->fail; 1404 } 1405 1406 static int testapp_validate_traffic(struct test_spec *test) 1407 { 1408 struct ifobject *ifobj_tx = test->ifobj_tx; 1409 struct ifobject *ifobj_rx = test->ifobj_rx; 1410 pthread_t t0, t1; 1411 1412 if (pthread_barrier_init(&barr, NULL, 2)) 1413 exit_with_error(errno); 1414 1415 test->current_step++; 1416 pkt_stream_reset(ifobj_rx->pkt_stream); 1417 pkts_in_flight = 0; 1418 1419 /*Spawn RX thread */ 1420 pthread_create(&t0, NULL, ifobj_rx->func_ptr, test); 1421 1422 pthread_barrier_wait(&barr); 1423 if (pthread_barrier_destroy(&barr)) 1424 exit_with_error(errno); 1425 1426 /*Spawn TX thread */ 1427 pthread_create(&t1, NULL, ifobj_tx->func_ptr, test); 1428 1429 pthread_join(t1, NULL); 1430 pthread_join(t0, NULL); 1431 1432 if (test->total_steps == test->current_step || test->fail) { 1433 xsk_socket__delete(ifobj_tx->xsk->xsk); 1434 xsk_socket__delete(ifobj_rx->xsk->xsk); 1435 testapp_clean_xsk_umem(ifobj_rx); 1436 if (!ifobj_tx->shared_umem) 1437 testapp_clean_xsk_umem(ifobj_tx); 1438 } 1439 1440 return !!test->fail; 1441 } 1442 1443 static void testapp_teardown(struct test_spec *test) 1444 { 1445 int i; 1446 1447 test_spec_set_name(test, "TEARDOWN"); 1448 for (i = 0; i < MAX_TEARDOWN_ITER; i++) { 1449 if (testapp_validate_traffic(test)) 1450 return; 1451 test_spec_reset(test); 1452 } 1453 } 1454 1455 static void swap_directions(struct ifobject **ifobj1, struct ifobject **ifobj2) 1456 { 1457 thread_func_t tmp_func_ptr = (*ifobj1)->func_ptr; 1458 struct ifobject *tmp_ifobj = (*ifobj1); 1459 1460 (*ifobj1)->func_ptr = (*ifobj2)->func_ptr; 1461 (*ifobj2)->func_ptr = tmp_func_ptr; 1462 1463 *ifobj1 = *ifobj2; 1464 *ifobj2 = tmp_ifobj; 1465 } 1466 1467 static void testapp_bidi(struct test_spec *test) 1468 { 1469 test_spec_set_name(test, "BIDIRECTIONAL"); 1470 test->ifobj_tx->rx_on = true; 1471 test->ifobj_rx->tx_on = true; 1472 test->total_steps = 2; 1473 if (testapp_validate_traffic(test)) 1474 return; 1475 1476 print_verbose("Switching Tx/Rx vectors\n"); 1477 swap_directions(&test->ifobj_rx, &test->ifobj_tx); 1478 testapp_validate_traffic(test); 1479 1480 swap_directions(&test->ifobj_rx, &test->ifobj_tx); 1481 } 1482 1483 static void swap_xsk_resources(struct ifobject *ifobj_tx, struct ifobject *ifobj_rx) 1484 { 1485 int ret, queue_id = 0, fd = xsk_socket__fd(ifobj_rx->xsk->xsk); 1486 1487 xsk_socket__delete(ifobj_tx->xsk->xsk); 1488 xsk_socket__delete(ifobj_rx->xsk->xsk); 1489 ifobj_tx->xsk = &ifobj_tx->xsk_arr[1]; 1490 ifobj_rx->xsk = &ifobj_rx->xsk_arr[1]; 1491 1492 ret = bpf_map_update_elem(ifobj_rx->xsk_map_fd, &queue_id, &fd, 0); 1493 if (ret) 1494 exit_with_error(errno); 1495 } 1496 1497 static void testapp_bpf_res(struct test_spec *test) 1498 { 1499 test_spec_set_name(test, "BPF_RES"); 1500 test->total_steps = 2; 1501 test->nb_sockets = 2; 1502 if (testapp_validate_traffic(test)) 1503 return; 1504 1505 swap_xsk_resources(test->ifobj_tx, test->ifobj_rx); 1506 testapp_validate_traffic(test); 1507 } 1508 1509 static void testapp_headroom(struct test_spec *test) 1510 { 1511 test_spec_set_name(test, "UMEM_HEADROOM"); 1512 test->ifobj_rx->umem->frame_headroom = UMEM_HEADROOM_TEST_SIZE; 1513 testapp_validate_traffic(test); 1514 } 1515 1516 static void testapp_stats_rx_dropped(struct test_spec *test) 1517 { 1518 test_spec_set_name(test, "STAT_RX_DROPPED"); 1519 pkt_stream_replace_half(test, MIN_PKT_SIZE * 4, 0); 1520 test->ifobj_rx->umem->frame_headroom = test->ifobj_rx->umem->frame_size - 1521 XDP_PACKET_HEADROOM - MIN_PKT_SIZE * 3; 1522 pkt_stream_receive_half(test); 1523 test->ifobj_rx->validation_func = validate_rx_dropped; 1524 testapp_validate_traffic(test); 1525 } 1526 1527 static void testapp_stats_tx_invalid_descs(struct test_spec *test) 1528 { 1529 test_spec_set_name(test, "STAT_TX_INVALID"); 1530 pkt_stream_replace_half(test, XSK_UMEM__INVALID_FRAME_SIZE, 0); 1531 test->ifobj_tx->validation_func = validate_tx_invalid_descs; 1532 testapp_validate_traffic(test); 1533 1534 pkt_stream_restore_default(test); 1535 } 1536 1537 static void testapp_stats_rx_full(struct test_spec *test) 1538 { 1539 test_spec_set_name(test, "STAT_RX_FULL"); 1540 pkt_stream_replace(test, DEFAULT_UMEM_BUFFERS + DEFAULT_UMEM_BUFFERS / 2, PKT_SIZE); 1541 test->ifobj_rx->pkt_stream = pkt_stream_generate(test->ifobj_rx->umem, 1542 DEFAULT_UMEM_BUFFERS, PKT_SIZE); 1543 if (!test->ifobj_rx->pkt_stream) 1544 exit_with_error(ENOMEM); 1545 1546 test->ifobj_rx->xsk->rxqsize = DEFAULT_UMEM_BUFFERS; 1547 test->ifobj_rx->release_rx = false; 1548 test->ifobj_rx->validation_func = validate_rx_full; 1549 testapp_validate_traffic(test); 1550 1551 pkt_stream_restore_default(test); 1552 } 1553 1554 static void testapp_stats_fill_empty(struct test_spec *test) 1555 { 1556 test_spec_set_name(test, "STAT_RX_FILL_EMPTY"); 1557 pkt_stream_replace(test, DEFAULT_UMEM_BUFFERS + DEFAULT_UMEM_BUFFERS / 2, PKT_SIZE); 1558 test->ifobj_rx->pkt_stream = pkt_stream_generate(test->ifobj_rx->umem, 1559 DEFAULT_UMEM_BUFFERS, PKT_SIZE); 1560 if (!test->ifobj_rx->pkt_stream) 1561 exit_with_error(ENOMEM); 1562 1563 test->ifobj_rx->use_fill_ring = false; 1564 test->ifobj_rx->validation_func = validate_fill_empty; 1565 testapp_validate_traffic(test); 1566 1567 pkt_stream_restore_default(test); 1568 } 1569 1570 /* Simple test */ 1571 static bool hugepages_present(struct ifobject *ifobject) 1572 { 1573 const size_t mmap_sz = 2 * ifobject->umem->num_frames * ifobject->umem->frame_size; 1574 void *bufs; 1575 1576 bufs = mmap(NULL, mmap_sz, PROT_READ | PROT_WRITE, 1577 MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0); 1578 if (bufs == MAP_FAILED) 1579 return false; 1580 1581 munmap(bufs, mmap_sz); 1582 return true; 1583 } 1584 1585 static bool testapp_unaligned(struct test_spec *test) 1586 { 1587 if (!hugepages_present(test->ifobj_tx)) { 1588 ksft_test_result_skip("No 2M huge pages present.\n"); 1589 return false; 1590 } 1591 1592 test_spec_set_name(test, "UNALIGNED_MODE"); 1593 test->ifobj_tx->umem->unaligned_mode = true; 1594 test->ifobj_rx->umem->unaligned_mode = true; 1595 /* Let half of the packets straddle a buffer boundrary */ 1596 pkt_stream_replace_half(test, PKT_SIZE, -PKT_SIZE / 2); 1597 test->ifobj_rx->pkt_stream->use_addr_for_fill = true; 1598 testapp_validate_traffic(test); 1599 1600 pkt_stream_restore_default(test); 1601 return true; 1602 } 1603 1604 static void testapp_single_pkt(struct test_spec *test) 1605 { 1606 struct pkt pkts[] = {{0x1000, PKT_SIZE, 0, true}}; 1607 1608 pkt_stream_generate_custom(test, pkts, ARRAY_SIZE(pkts)); 1609 testapp_validate_traffic(test); 1610 pkt_stream_restore_default(test); 1611 } 1612 1613 static void testapp_invalid_desc(struct test_spec *test) 1614 { 1615 struct pkt pkts[] = { 1616 /* Zero packet address allowed */ 1617 {0, PKT_SIZE, 0, true}, 1618 /* Allowed packet */ 1619 {0x1000, PKT_SIZE, 0, true}, 1620 /* Straddling the start of umem */ 1621 {-2, PKT_SIZE, 0, false}, 1622 /* Packet too large */ 1623 {0x2000, XSK_UMEM__INVALID_FRAME_SIZE, 0, false}, 1624 /* After umem ends */ 1625 {UMEM_SIZE, PKT_SIZE, 0, false}, 1626 /* Straddle the end of umem */ 1627 {UMEM_SIZE - PKT_SIZE / 2, PKT_SIZE, 0, false}, 1628 /* Straddle a page boundrary */ 1629 {0x3000 - PKT_SIZE / 2, PKT_SIZE, 0, false}, 1630 /* Straddle a 2K boundrary */ 1631 {0x3800 - PKT_SIZE / 2, PKT_SIZE, 0, true}, 1632 /* Valid packet for synch so that something is received */ 1633 {0x4000, PKT_SIZE, 0, true}}; 1634 1635 if (test->ifobj_tx->umem->unaligned_mode) { 1636 /* Crossing a page boundrary allowed */ 1637 pkts[6].valid = true; 1638 } 1639 if (test->ifobj_tx->umem->frame_size == XSK_UMEM__DEFAULT_FRAME_SIZE / 2) { 1640 /* Crossing a 2K frame size boundrary not allowed */ 1641 pkts[7].valid = false; 1642 } 1643 1644 if (test->ifobj_tx->shared_umem) { 1645 pkts[4].addr += UMEM_SIZE; 1646 pkts[5].addr += UMEM_SIZE; 1647 } 1648 1649 pkt_stream_generate_custom(test, pkts, ARRAY_SIZE(pkts)); 1650 testapp_validate_traffic(test); 1651 pkt_stream_restore_default(test); 1652 } 1653 1654 static void init_iface(struct ifobject *ifobj, const char *dst_mac, const char *src_mac, 1655 const char *dst_ip, const char *src_ip, const u16 dst_port, 1656 const u16 src_port, thread_func_t func_ptr, bool load_xdp) 1657 { 1658 int xsk_map_fd, prog_fd, err; 1659 struct in_addr ip; 1660 1661 memcpy(ifobj->dst_mac, dst_mac, ETH_ALEN); 1662 memcpy(ifobj->src_mac, src_mac, ETH_ALEN); 1663 1664 inet_aton(dst_ip, &ip); 1665 ifobj->dst_ip = ip.s_addr; 1666 1667 inet_aton(src_ip, &ip); 1668 ifobj->src_ip = ip.s_addr; 1669 1670 ifobj->dst_port = dst_port; 1671 ifobj->src_port = src_port; 1672 1673 ifobj->func_ptr = func_ptr; 1674 1675 if (!load_xdp) 1676 return; 1677 1678 err = xsk_load_xdp_program(&xsk_map_fd, &prog_fd); 1679 if (err) { 1680 printf("Error loading XDP program\n"); 1681 exit_with_error(err); 1682 } 1683 1684 ifobj->xsk_map_fd = xsk_map_fd; 1685 ifobj->prog_fd = prog_fd; 1686 ifobj->xdp_flags = mode_to_xdp_flags(TEST_MODE_SKB); 1687 ifobj->link_fd = xsk_attach_xdp_program(ifobj->ifindex, prog_fd, ifobj->xdp_flags); 1688 if (ifobj->link_fd < 0) { 1689 printf("Error attaching XDP program\n"); 1690 exit_with_error(ifobj->link_fd); 1691 } 1692 } 1693 1694 static void run_pkt_test(struct test_spec *test, enum test_mode mode, enum test_type type) 1695 { 1696 switch (type) { 1697 case TEST_TYPE_STATS_RX_DROPPED: 1698 if (mode == TEST_MODE_ZC) { 1699 ksft_test_result_skip("Can not run RX_DROPPED test for ZC mode\n"); 1700 return; 1701 } 1702 testapp_stats_rx_dropped(test); 1703 break; 1704 case TEST_TYPE_STATS_TX_INVALID_DESCS: 1705 testapp_stats_tx_invalid_descs(test); 1706 break; 1707 case TEST_TYPE_STATS_RX_FULL: 1708 testapp_stats_rx_full(test); 1709 break; 1710 case TEST_TYPE_STATS_FILL_EMPTY: 1711 testapp_stats_fill_empty(test); 1712 break; 1713 case TEST_TYPE_TEARDOWN: 1714 testapp_teardown(test); 1715 break; 1716 case TEST_TYPE_BIDI: 1717 testapp_bidi(test); 1718 break; 1719 case TEST_TYPE_BPF_RES: 1720 testapp_bpf_res(test); 1721 break; 1722 case TEST_TYPE_RUN_TO_COMPLETION: 1723 test_spec_set_name(test, "RUN_TO_COMPLETION"); 1724 testapp_validate_traffic(test); 1725 break; 1726 case TEST_TYPE_RUN_TO_COMPLETION_SINGLE_PKT: 1727 test_spec_set_name(test, "RUN_TO_COMPLETION_SINGLE_PKT"); 1728 testapp_single_pkt(test); 1729 break; 1730 case TEST_TYPE_RUN_TO_COMPLETION_2K_FRAME: 1731 test_spec_set_name(test, "RUN_TO_COMPLETION_2K_FRAME_SIZE"); 1732 test->ifobj_tx->umem->frame_size = 2048; 1733 test->ifobj_rx->umem->frame_size = 2048; 1734 pkt_stream_replace(test, DEFAULT_PKT_CNT, PKT_SIZE); 1735 testapp_validate_traffic(test); 1736 1737 pkt_stream_restore_default(test); 1738 break; 1739 case TEST_TYPE_RX_POLL: 1740 test->ifobj_rx->use_poll = true; 1741 test_spec_set_name(test, "POLL_RX"); 1742 testapp_validate_traffic(test); 1743 break; 1744 case TEST_TYPE_TX_POLL: 1745 test->ifobj_tx->use_poll = true; 1746 test_spec_set_name(test, "POLL_TX"); 1747 testapp_validate_traffic(test); 1748 break; 1749 case TEST_TYPE_POLL_TXQ_TMOUT: 1750 test_spec_set_name(test, "POLL_TXQ_FULL"); 1751 test->ifobj_tx->use_poll = true; 1752 /* create invalid frame by set umem frame_size and pkt length equal to 2048 */ 1753 test->ifobj_tx->umem->frame_size = 2048; 1754 pkt_stream_replace(test, 2 * DEFAULT_PKT_CNT, 2048); 1755 testapp_validate_traffic_single_thread(test, test->ifobj_tx, type); 1756 pkt_stream_restore_default(test); 1757 break; 1758 case TEST_TYPE_POLL_RXQ_TMOUT: 1759 test_spec_set_name(test, "POLL_RXQ_EMPTY"); 1760 test->ifobj_rx->use_poll = true; 1761 testapp_validate_traffic_single_thread(test, test->ifobj_rx, type); 1762 break; 1763 case TEST_TYPE_ALIGNED_INV_DESC: 1764 test_spec_set_name(test, "ALIGNED_INV_DESC"); 1765 testapp_invalid_desc(test); 1766 break; 1767 case TEST_TYPE_ALIGNED_INV_DESC_2K_FRAME: 1768 test_spec_set_name(test, "ALIGNED_INV_DESC_2K_FRAME_SIZE"); 1769 test->ifobj_tx->umem->frame_size = 2048; 1770 test->ifobj_rx->umem->frame_size = 2048; 1771 testapp_invalid_desc(test); 1772 break; 1773 case TEST_TYPE_UNALIGNED_INV_DESC: 1774 if (!hugepages_present(test->ifobj_tx)) { 1775 ksft_test_result_skip("No 2M huge pages present.\n"); 1776 return; 1777 } 1778 test_spec_set_name(test, "UNALIGNED_INV_DESC"); 1779 test->ifobj_tx->umem->unaligned_mode = true; 1780 test->ifobj_rx->umem->unaligned_mode = true; 1781 testapp_invalid_desc(test); 1782 break; 1783 case TEST_TYPE_UNALIGNED: 1784 if (!testapp_unaligned(test)) 1785 return; 1786 break; 1787 case TEST_TYPE_HEADROOM: 1788 testapp_headroom(test); 1789 break; 1790 default: 1791 break; 1792 } 1793 1794 if (!test->fail) 1795 ksft_test_result_pass("PASS: %s %s%s\n", mode_string(test), busy_poll_string(test), 1796 test->name); 1797 } 1798 1799 static struct ifobject *ifobject_create(void) 1800 { 1801 struct ifobject *ifobj; 1802 1803 ifobj = calloc(1, sizeof(struct ifobject)); 1804 if (!ifobj) 1805 return NULL; 1806 1807 ifobj->xsk_arr = calloc(MAX_SOCKETS, sizeof(*ifobj->xsk_arr)); 1808 if (!ifobj->xsk_arr) 1809 goto out_xsk_arr; 1810 1811 ifobj->umem = calloc(1, sizeof(*ifobj->umem)); 1812 if (!ifobj->umem) 1813 goto out_umem; 1814 1815 return ifobj; 1816 1817 out_umem: 1818 free(ifobj->xsk_arr); 1819 out_xsk_arr: 1820 free(ifobj); 1821 return NULL; 1822 } 1823 1824 static void ifobject_delete(struct ifobject *ifobj) 1825 { 1826 close(ifobj->prog_fd); 1827 close(ifobj->xsk_map_fd); 1828 1829 free(ifobj->umem); 1830 free(ifobj->xsk_arr); 1831 free(ifobj); 1832 } 1833 1834 static bool is_xdp_supported(int ifindex) 1835 { 1836 int flags = XDP_FLAGS_DRV_MODE; 1837 1838 LIBBPF_OPTS(bpf_link_create_opts, opts, .flags = flags); 1839 struct bpf_insn insns[2] = { 1840 BPF_MOV64_IMM(BPF_REG_0, XDP_PASS), 1841 BPF_EXIT_INSN() 1842 }; 1843 int prog_fd, insn_cnt = ARRAY_SIZE(insns); 1844 int err; 1845 1846 prog_fd = bpf_prog_load(BPF_PROG_TYPE_XDP, NULL, "GPL", insns, insn_cnt, NULL); 1847 if (prog_fd < 0) 1848 return false; 1849 1850 err = bpf_xdp_attach(ifindex, prog_fd, flags, NULL); 1851 if (err) { 1852 close(prog_fd); 1853 return false; 1854 } 1855 1856 bpf_xdp_detach(ifindex, flags, NULL); 1857 close(prog_fd); 1858 1859 return true; 1860 } 1861 1862 static void change_to_drv_mode(struct ifobject *ifobj) 1863 { 1864 LIBBPF_OPTS(bpf_xdp_query_opts, opts); 1865 int ret; 1866 1867 close(ifobj->link_fd); 1868 ifobj->link_fd = xsk_attach_xdp_program(ifobj->ifindex, ifobj->prog_fd, 1869 XDP_FLAGS_DRV_MODE); 1870 if (ifobj->link_fd < 0) { 1871 ksft_print_msg("Error attaching XDP program\n"); 1872 exit_with_error(-ifobj->link_fd); 1873 } 1874 1875 ret = bpf_xdp_query(ifobj->ifindex, XDP_FLAGS_DRV_MODE, &opts); 1876 if (ret) 1877 exit_with_error(errno); 1878 1879 if (opts.attach_mode != XDP_ATTACHED_DRV) { 1880 ksft_print_msg("ERROR: XDP prog not in DRV mode\n"); 1881 exit_with_error(EINVAL); 1882 } 1883 } 1884 1885 int main(int argc, char **argv) 1886 { 1887 struct pkt_stream *rx_pkt_stream_default; 1888 struct pkt_stream *tx_pkt_stream_default; 1889 struct ifobject *ifobj_tx, *ifobj_rx; 1890 int modes = TEST_MODE_SKB + 1; 1891 u32 i, j, failed_tests = 0; 1892 struct test_spec test; 1893 bool shared_netdev; 1894 1895 /* Use libbpf 1.0 API mode */ 1896 libbpf_set_strict_mode(LIBBPF_STRICT_ALL); 1897 1898 ifobj_tx = ifobject_create(); 1899 if (!ifobj_tx) 1900 exit_with_error(ENOMEM); 1901 ifobj_rx = ifobject_create(); 1902 if (!ifobj_rx) 1903 exit_with_error(ENOMEM); 1904 1905 setlocale(LC_ALL, ""); 1906 1907 parse_command_line(ifobj_tx, ifobj_rx, argc, argv); 1908 1909 shared_netdev = (ifobj_tx->ifindex == ifobj_rx->ifindex); 1910 ifobj_tx->shared_umem = shared_netdev; 1911 ifobj_rx->shared_umem = shared_netdev; 1912 1913 if (!validate_interface(ifobj_tx) || !validate_interface(ifobj_rx)) { 1914 usage(basename(argv[0])); 1915 ksft_exit_xfail(); 1916 } 1917 1918 if (is_xdp_supported(ifobj_tx->ifindex)) { 1919 modes++; 1920 if (ifobj_zc_avail(ifobj_tx)) 1921 modes++; 1922 } 1923 1924 init_iface(ifobj_rx, MAC1, MAC2, IP1, IP2, UDP_PORT1, UDP_PORT2, 1925 worker_testapp_validate_rx, true); 1926 init_iface(ifobj_tx, MAC2, MAC1, IP2, IP1, UDP_PORT2, UDP_PORT1, 1927 worker_testapp_validate_tx, !shared_netdev); 1928 1929 test_spec_init(&test, ifobj_tx, ifobj_rx, 0); 1930 tx_pkt_stream_default = pkt_stream_generate(ifobj_tx->umem, DEFAULT_PKT_CNT, PKT_SIZE); 1931 rx_pkt_stream_default = pkt_stream_generate(ifobj_rx->umem, DEFAULT_PKT_CNT, PKT_SIZE); 1932 if (!tx_pkt_stream_default || !rx_pkt_stream_default) 1933 exit_with_error(ENOMEM); 1934 test.tx_pkt_stream_default = tx_pkt_stream_default; 1935 test.rx_pkt_stream_default = rx_pkt_stream_default; 1936 1937 ksft_set_plan(modes * TEST_TYPE_MAX); 1938 1939 for (i = 0; i < modes; i++) { 1940 if (i == TEST_MODE_DRV) { 1941 change_to_drv_mode(ifobj_rx); 1942 if (!shared_netdev) 1943 change_to_drv_mode(ifobj_tx); 1944 } 1945 1946 for (j = 0; j < TEST_TYPE_MAX; j++) { 1947 test_spec_init(&test, ifobj_tx, ifobj_rx, i); 1948 run_pkt_test(&test, i, j); 1949 usleep(USLEEP_MAX); 1950 1951 if (test.fail) 1952 failed_tests++; 1953 } 1954 } 1955 1956 pkt_stream_delete(tx_pkt_stream_default); 1957 pkt_stream_delete(rx_pkt_stream_default); 1958 ifobject_delete(ifobj_tx); 1959 ifobject_delete(ifobj_rx); 1960 1961 if (failed_tests) 1962 ksft_exit_fail(); 1963 else 1964 ksft_exit_pass(); 1965 } 1966