1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * tcpdevmem netcat. Works similarly to netcat but does device memory TCP 4 * instead of regular TCP. Uses udmabuf to mock a dmabuf provider. 5 * 6 * Usage: 7 * 8 * On server: 9 * ncdevmem -s <server IP> [-c <client IP>] -f eth1 -l -p 5201 10 * 11 * On client: 12 * echo -n "hello\nworld" | \ 13 * ncdevmem -s <server IP> [-c <client IP>] -p 5201 -f eth1 14 * 15 * Note this is compatible with regular netcat. i.e. the sender or receiver can 16 * be replaced with regular netcat to test the RX or TX path in isolation. 17 * 18 * Test data validation (devmem TCP on RX only): 19 * 20 * On server: 21 * ncdevmem -s <server IP> [-c <client IP>] -f eth1 -l -p 5201 -v 7 22 * 23 * On client: 24 * yes $(echo -e \\x01\\x02\\x03\\x04\\x05\\x06) | \ 25 * head -c 1G | \ 26 * nc <server IP> 5201 -p 5201 27 * 28 * Test data validation (devmem TCP on RX and TX, validation happens on RX): 29 * 30 * On server: 31 * ncdevmem -s <server IP> [-c <client IP>] -l -p 5201 -v 8 -f eth1 32 * 33 * On client: 34 * yes $(echo -e \\x01\\x02\\x03\\x04\\x05\\x06\\x07) | \ 35 * head -c 1M | \ 36 * ncdevmem -s <server IP> [-c <client IP>] -p 5201 -f eth1 37 */ 38 #define _GNU_SOURCE 39 #define __EXPORTED_HEADERS__ 40 41 #include <linux/uio.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 #include <stdbool.h> 46 #include <string.h> 47 #include <errno.h> 48 #define __iovec_defined 49 #include <fcntl.h> 50 #include <malloc.h> 51 #include <error.h> 52 #include <poll.h> 53 54 #include <arpa/inet.h> 55 #include <sys/socket.h> 56 #include <sys/mman.h> 57 #include <sys/ioctl.h> 58 #include <sys/syscall.h> 59 #include <sys/time.h> 60 61 #include <linux/memfd.h> 62 #include <linux/dma-buf.h> 63 #include <linux/errqueue.h> 64 #include <linux/udmabuf.h> 65 #include <linux/types.h> 66 #include <linux/netlink.h> 67 #include <linux/genetlink.h> 68 #include <linux/netdev.h> 69 #include <linux/ethtool_netlink.h> 70 #include <time.h> 71 #include <net/if.h> 72 73 #include "netdev-user.h" 74 #include "ethtool-user.h" 75 #include <ynl.h> 76 77 #define PAGE_SHIFT 12 78 #define TEST_PREFIX "ncdevmem" 79 #define NUM_PAGES 16000 80 81 #ifndef MSG_SOCK_DEVMEM 82 #define MSG_SOCK_DEVMEM 0x2000000 83 #endif 84 85 #define MAX_IOV 1024 86 87 static size_t max_chunk; 88 static char *server_ip; 89 static char *client_ip; 90 static char *port; 91 static size_t do_validation; 92 static int start_queue = -1; 93 static int num_queues = -1; 94 static char *ifname; 95 static unsigned int ifindex; 96 static unsigned int dmabuf_id; 97 static uint32_t tx_dmabuf_id; 98 static int waittime_ms = 500; 99 100 struct memory_buffer { 101 int fd; 102 size_t size; 103 104 int devfd; 105 int memfd; 106 char *buf_mem; 107 }; 108 109 struct memory_provider { 110 struct memory_buffer *(*alloc)(size_t size); 111 void (*free)(struct memory_buffer *ctx); 112 void (*memcpy_to_device)(struct memory_buffer *dst, size_t off, 113 void *src, int n); 114 void (*memcpy_from_device)(void *dst, struct memory_buffer *src, 115 size_t off, int n); 116 }; 117 118 static struct memory_buffer *udmabuf_alloc(size_t size) 119 { 120 struct udmabuf_create create; 121 struct memory_buffer *ctx; 122 int ret; 123 124 ctx = malloc(sizeof(*ctx)); 125 if (!ctx) 126 error(1, ENOMEM, "malloc failed"); 127 128 ctx->size = size; 129 130 ctx->devfd = open("/dev/udmabuf", O_RDWR); 131 if (ctx->devfd < 0) 132 error(1, errno, 133 "%s: [skip,no-udmabuf: Unable to access DMA buffer device file]\n", 134 TEST_PREFIX); 135 136 ctx->memfd = memfd_create("udmabuf-test", MFD_ALLOW_SEALING); 137 if (ctx->memfd < 0) 138 error(1, errno, "%s: [skip,no-memfd]\n", TEST_PREFIX); 139 140 ret = fcntl(ctx->memfd, F_ADD_SEALS, F_SEAL_SHRINK); 141 if (ret < 0) 142 error(1, errno, "%s: [skip,fcntl-add-seals]\n", TEST_PREFIX); 143 144 ret = ftruncate(ctx->memfd, size); 145 if (ret == -1) 146 error(1, errno, "%s: [FAIL,memfd-truncate]\n", TEST_PREFIX); 147 148 memset(&create, 0, sizeof(create)); 149 150 create.memfd = ctx->memfd; 151 create.offset = 0; 152 create.size = size; 153 ctx->fd = ioctl(ctx->devfd, UDMABUF_CREATE, &create); 154 if (ctx->fd < 0) 155 error(1, errno, "%s: [FAIL, create udmabuf]\n", TEST_PREFIX); 156 157 ctx->buf_mem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, 158 ctx->fd, 0); 159 if (ctx->buf_mem == MAP_FAILED) 160 error(1, errno, "%s: [FAIL, map udmabuf]\n", TEST_PREFIX); 161 162 return ctx; 163 } 164 165 static void udmabuf_free(struct memory_buffer *ctx) 166 { 167 munmap(ctx->buf_mem, ctx->size); 168 close(ctx->fd); 169 close(ctx->memfd); 170 close(ctx->devfd); 171 free(ctx); 172 } 173 174 static void udmabuf_memcpy_to_device(struct memory_buffer *dst, size_t off, 175 void *src, int n) 176 { 177 struct dma_buf_sync sync = {}; 178 179 sync.flags = DMA_BUF_SYNC_START | DMA_BUF_SYNC_WRITE; 180 ioctl(dst->fd, DMA_BUF_IOCTL_SYNC, &sync); 181 182 memcpy(dst->buf_mem + off, src, n); 183 184 sync.flags = DMA_BUF_SYNC_END | DMA_BUF_SYNC_WRITE; 185 ioctl(dst->fd, DMA_BUF_IOCTL_SYNC, &sync); 186 } 187 188 static void udmabuf_memcpy_from_device(void *dst, struct memory_buffer *src, 189 size_t off, int n) 190 { 191 struct dma_buf_sync sync = {}; 192 193 sync.flags = DMA_BUF_SYNC_START; 194 ioctl(src->fd, DMA_BUF_IOCTL_SYNC, &sync); 195 196 memcpy(dst, src->buf_mem + off, n); 197 198 sync.flags = DMA_BUF_SYNC_END; 199 ioctl(src->fd, DMA_BUF_IOCTL_SYNC, &sync); 200 } 201 202 static struct memory_provider udmabuf_memory_provider = { 203 .alloc = udmabuf_alloc, 204 .free = udmabuf_free, 205 .memcpy_to_device = udmabuf_memcpy_to_device, 206 .memcpy_from_device = udmabuf_memcpy_from_device, 207 }; 208 209 static struct memory_provider *provider = &udmabuf_memory_provider; 210 211 static void print_nonzero_bytes(void *ptr, size_t size) 212 { 213 unsigned char *p = ptr; 214 unsigned int i; 215 216 for (i = 0; i < size; i++) 217 putchar(p[i]); 218 } 219 220 void validate_buffer(void *line, size_t size) 221 { 222 static unsigned char seed = 1; 223 unsigned char *ptr = line; 224 unsigned char expected; 225 static int errors; 226 size_t i; 227 228 for (i = 0; i < size; i++) { 229 expected = seed ? seed : '\n'; 230 if (ptr[i] != expected) { 231 fprintf(stderr, 232 "Failed validation: expected=%u, actual=%u, index=%lu\n", 233 expected, ptr[i], i); 234 errors++; 235 if (errors > 20) 236 error(1, 0, "validation failed."); 237 } 238 seed++; 239 if (seed == do_validation) 240 seed = 0; 241 } 242 243 fprintf(stdout, "Validated buffer\n"); 244 } 245 246 static int rxq_num(int ifindex) 247 { 248 struct ethtool_channels_get_req *req; 249 struct ethtool_channels_get_rsp *rsp; 250 struct ynl_error yerr; 251 struct ynl_sock *ys; 252 int num = -1; 253 254 ys = ynl_sock_create(&ynl_ethtool_family, &yerr); 255 if (!ys) { 256 fprintf(stderr, "YNL: %s\n", yerr.msg); 257 return -1; 258 } 259 260 req = ethtool_channels_get_req_alloc(); 261 ethtool_channels_get_req_set_header_dev_index(req, ifindex); 262 rsp = ethtool_channels_get(ys, req); 263 if (rsp) 264 num = rsp->rx_count + rsp->combined_count; 265 ethtool_channels_get_req_free(req); 266 ethtool_channels_get_rsp_free(rsp); 267 268 ynl_sock_destroy(ys); 269 270 return num; 271 } 272 273 #define run_command(cmd, ...) \ 274 ({ \ 275 char command[256]; \ 276 memset(command, 0, sizeof(command)); \ 277 snprintf(command, sizeof(command), cmd, ##__VA_ARGS__); \ 278 fprintf(stderr, "Running: %s\n", command); \ 279 system(command); \ 280 }) 281 282 static int reset_flow_steering(void) 283 { 284 /* Depending on the NIC, toggling ntuple off and on might not 285 * be allowed. Additionally, attempting to delete existing filters 286 * will fail if no filters are present. Therefore, do not enforce 287 * the exit status. 288 */ 289 290 run_command("sudo ethtool -K %s ntuple off >&2", ifname); 291 run_command("sudo ethtool -K %s ntuple on >&2", ifname); 292 run_command( 293 "sudo ethtool -n %s | grep 'Filter:' | awk '{print $2}' | xargs -n1 ethtool -N %s delete >&2", 294 ifname, ifname); 295 return 0; 296 } 297 298 static const char *tcp_data_split_str(int val) 299 { 300 switch (val) { 301 case 0: 302 return "off"; 303 case 1: 304 return "auto"; 305 case 2: 306 return "on"; 307 default: 308 return "?"; 309 } 310 } 311 312 static int configure_headersplit(bool on) 313 { 314 struct ethtool_rings_get_req *get_req; 315 struct ethtool_rings_get_rsp *get_rsp; 316 struct ethtool_rings_set_req *req; 317 struct ynl_error yerr; 318 struct ynl_sock *ys; 319 int ret; 320 321 ys = ynl_sock_create(&ynl_ethtool_family, &yerr); 322 if (!ys) { 323 fprintf(stderr, "YNL: %s\n", yerr.msg); 324 return -1; 325 } 326 327 req = ethtool_rings_set_req_alloc(); 328 ethtool_rings_set_req_set_header_dev_index(req, ifindex); 329 /* 0 - off, 1 - auto, 2 - on */ 330 ethtool_rings_set_req_set_tcp_data_split(req, on ? 2 : 0); 331 ret = ethtool_rings_set(ys, req); 332 if (ret < 0) 333 fprintf(stderr, "YNL failed: %s\n", ys->err.msg); 334 ethtool_rings_set_req_free(req); 335 336 if (ret == 0) { 337 get_req = ethtool_rings_get_req_alloc(); 338 ethtool_rings_get_req_set_header_dev_index(get_req, ifindex); 339 get_rsp = ethtool_rings_get(ys, get_req); 340 ethtool_rings_get_req_free(get_req); 341 if (get_rsp) 342 fprintf(stderr, "TCP header split: %s\n", 343 tcp_data_split_str(get_rsp->tcp_data_split)); 344 ethtool_rings_get_rsp_free(get_rsp); 345 } 346 347 ynl_sock_destroy(ys); 348 349 return ret; 350 } 351 352 static int configure_rss(void) 353 { 354 return run_command("sudo ethtool -X %s equal %d >&2", ifname, start_queue); 355 } 356 357 static int configure_channels(unsigned int rx, unsigned int tx) 358 { 359 return run_command("sudo ethtool -L %s rx %u tx %u", ifname, rx, tx); 360 } 361 362 static int configure_flow_steering(struct sockaddr_in6 *server_sin) 363 { 364 const char *type = "tcp6"; 365 const char *server_addr; 366 char buf[40]; 367 368 inet_ntop(AF_INET6, &server_sin->sin6_addr, buf, sizeof(buf)); 369 server_addr = buf; 370 371 if (IN6_IS_ADDR_V4MAPPED(&server_sin->sin6_addr)) { 372 type = "tcp4"; 373 server_addr = strrchr(server_addr, ':') + 1; 374 } 375 376 /* Try configure 5-tuple */ 377 if (run_command("sudo ethtool -N %s flow-type %s %s %s dst-ip %s %s %s dst-port %s queue %d >&2", 378 ifname, 379 type, 380 client_ip ? "src-ip" : "", 381 client_ip ?: "", 382 server_addr, 383 client_ip ? "src-port" : "", 384 client_ip ? port : "", 385 port, start_queue)) 386 /* If that fails, try configure 3-tuple */ 387 if (run_command("sudo ethtool -N %s flow-type %s dst-ip %s dst-port %s queue %d >&2", 388 ifname, 389 type, 390 server_addr, 391 port, start_queue)) 392 /* If that fails, return error */ 393 return -1; 394 395 return 0; 396 } 397 398 static int bind_rx_queue(unsigned int ifindex, unsigned int dmabuf_fd, 399 struct netdev_queue_id *queues, 400 unsigned int n_queue_index, struct ynl_sock **ys) 401 { 402 struct netdev_bind_rx_req *req = NULL; 403 struct netdev_bind_rx_rsp *rsp = NULL; 404 struct ynl_error yerr; 405 406 *ys = ynl_sock_create(&ynl_netdev_family, &yerr); 407 if (!*ys) { 408 fprintf(stderr, "YNL: %s\n", yerr.msg); 409 return -1; 410 } 411 412 req = netdev_bind_rx_req_alloc(); 413 netdev_bind_rx_req_set_ifindex(req, ifindex); 414 netdev_bind_rx_req_set_fd(req, dmabuf_fd); 415 __netdev_bind_rx_req_set_queues(req, queues, n_queue_index); 416 417 rsp = netdev_bind_rx(*ys, req); 418 if (!rsp) { 419 perror("netdev_bind_rx"); 420 goto err_close; 421 } 422 423 if (!rsp->_present.id) { 424 perror("id not present"); 425 goto err_close; 426 } 427 428 fprintf(stderr, "got dmabuf id=%d\n", rsp->id); 429 dmabuf_id = rsp->id; 430 431 netdev_bind_rx_req_free(req); 432 netdev_bind_rx_rsp_free(rsp); 433 434 return 0; 435 436 err_close: 437 fprintf(stderr, "YNL failed: %s\n", (*ys)->err.msg); 438 netdev_bind_rx_req_free(req); 439 ynl_sock_destroy(*ys); 440 return -1; 441 } 442 443 static int bind_tx_queue(unsigned int ifindex, unsigned int dmabuf_fd, 444 struct ynl_sock **ys) 445 { 446 struct netdev_bind_tx_req *req = NULL; 447 struct netdev_bind_tx_rsp *rsp = NULL; 448 struct ynl_error yerr; 449 450 *ys = ynl_sock_create(&ynl_netdev_family, &yerr); 451 if (!*ys) { 452 fprintf(stderr, "YNL: %s\n", yerr.msg); 453 return -1; 454 } 455 456 req = netdev_bind_tx_req_alloc(); 457 netdev_bind_tx_req_set_ifindex(req, ifindex); 458 netdev_bind_tx_req_set_fd(req, dmabuf_fd); 459 460 rsp = netdev_bind_tx(*ys, req); 461 if (!rsp) { 462 perror("netdev_bind_tx"); 463 goto err_close; 464 } 465 466 if (!rsp->_present.id) { 467 perror("id not present"); 468 goto err_close; 469 } 470 471 fprintf(stderr, "got tx dmabuf id=%d\n", rsp->id); 472 tx_dmabuf_id = rsp->id; 473 474 netdev_bind_tx_req_free(req); 475 netdev_bind_tx_rsp_free(rsp); 476 477 return 0; 478 479 err_close: 480 fprintf(stderr, "YNL failed: %s\n", (*ys)->err.msg); 481 netdev_bind_tx_req_free(req); 482 ynl_sock_destroy(*ys); 483 return -1; 484 } 485 486 static void enable_reuseaddr(int fd) 487 { 488 int opt = 1; 489 int ret; 490 491 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)); 492 if (ret) 493 error(1, errno, "%s: [FAIL, SO_REUSEPORT]\n", TEST_PREFIX); 494 495 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); 496 if (ret) 497 error(1, errno, "%s: [FAIL, SO_REUSEADDR]\n", TEST_PREFIX); 498 } 499 500 static int parse_address(const char *str, int port, struct sockaddr_in6 *sin6) 501 { 502 int ret; 503 504 sin6->sin6_family = AF_INET6; 505 sin6->sin6_port = htons(port); 506 507 ret = inet_pton(sin6->sin6_family, str, &sin6->sin6_addr); 508 if (ret != 1) { 509 /* fallback to plain IPv4 */ 510 ret = inet_pton(AF_INET, str, &sin6->sin6_addr.s6_addr32[3]); 511 if (ret != 1) 512 return -1; 513 514 /* add ::ffff prefix */ 515 sin6->sin6_addr.s6_addr32[0] = 0; 516 sin6->sin6_addr.s6_addr32[1] = 0; 517 sin6->sin6_addr.s6_addr16[4] = 0; 518 sin6->sin6_addr.s6_addr16[5] = 0xffff; 519 } 520 521 return 0; 522 } 523 524 static struct netdev_queue_id *create_queues(void) 525 { 526 struct netdev_queue_id *queues; 527 size_t i = 0; 528 529 queues = calloc(num_queues, sizeof(*queues)); 530 for (i = 0; i < num_queues; i++) { 531 queues[i]._present.type = 1; 532 queues[i]._present.id = 1; 533 queues[i].type = NETDEV_QUEUE_TYPE_RX; 534 queues[i].id = start_queue + i; 535 } 536 537 return queues; 538 } 539 540 static int do_server(struct memory_buffer *mem) 541 { 542 char ctrl_data[sizeof(int) * 20000]; 543 size_t non_page_aligned_frags = 0; 544 struct sockaddr_in6 client_addr; 545 struct sockaddr_in6 server_sin; 546 size_t page_aligned_frags = 0; 547 size_t total_received = 0; 548 socklen_t client_addr_len; 549 bool is_devmem = false; 550 char *tmp_mem = NULL; 551 struct ynl_sock *ys; 552 char iobuf[819200]; 553 char buffer[256]; 554 int socket_fd; 555 int client_fd; 556 int ret; 557 558 ret = parse_address(server_ip, atoi(port), &server_sin); 559 if (ret < 0) 560 error(1, 0, "parse server address"); 561 562 if (reset_flow_steering()) 563 error(1, 0, "Failed to reset flow steering\n"); 564 565 if (configure_headersplit(1)) 566 error(1, 0, "Failed to enable TCP header split\n"); 567 568 /* Configure RSS to divert all traffic from our devmem queues */ 569 if (configure_rss()) 570 error(1, 0, "Failed to configure rss\n"); 571 572 /* Flow steer our devmem flows to start_queue */ 573 if (configure_flow_steering(&server_sin)) 574 error(1, 0, "Failed to configure flow steering\n"); 575 576 sleep(1); 577 578 if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) 579 error(1, 0, "Failed to bind\n"); 580 581 tmp_mem = malloc(mem->size); 582 if (!tmp_mem) 583 error(1, ENOMEM, "malloc failed"); 584 585 socket_fd = socket(AF_INET6, SOCK_STREAM, 0); 586 if (socket_fd < 0) 587 error(1, errno, "%s: [FAIL, create socket]\n", TEST_PREFIX); 588 589 enable_reuseaddr(socket_fd); 590 591 fprintf(stderr, "binding to address %s:%d\n", server_ip, 592 ntohs(server_sin.sin6_port)); 593 594 ret = bind(socket_fd, &server_sin, sizeof(server_sin)); 595 if (ret) 596 error(1, errno, "%s: [FAIL, bind]\n", TEST_PREFIX); 597 598 ret = listen(socket_fd, 1); 599 if (ret) 600 error(1, errno, "%s: [FAIL, listen]\n", TEST_PREFIX); 601 602 client_addr_len = sizeof(client_addr); 603 604 inet_ntop(AF_INET6, &server_sin.sin6_addr, buffer, 605 sizeof(buffer)); 606 fprintf(stderr, "Waiting or connection on %s:%d\n", buffer, 607 ntohs(server_sin.sin6_port)); 608 client_fd = accept(socket_fd, &client_addr, &client_addr_len); 609 610 inet_ntop(AF_INET6, &client_addr.sin6_addr, buffer, 611 sizeof(buffer)); 612 fprintf(stderr, "Got connection from %s:%d\n", buffer, 613 ntohs(client_addr.sin6_port)); 614 615 while (1) { 616 struct iovec iov = { .iov_base = iobuf, 617 .iov_len = sizeof(iobuf) }; 618 struct dmabuf_cmsg *dmabuf_cmsg = NULL; 619 struct cmsghdr *cm = NULL; 620 struct msghdr msg = { 0 }; 621 struct dmabuf_token token; 622 ssize_t ret; 623 624 is_devmem = false; 625 626 msg.msg_iov = &iov; 627 msg.msg_iovlen = 1; 628 msg.msg_control = ctrl_data; 629 msg.msg_controllen = sizeof(ctrl_data); 630 ret = recvmsg(client_fd, &msg, MSG_SOCK_DEVMEM); 631 fprintf(stderr, "recvmsg ret=%ld\n", ret); 632 if (ret < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)) 633 continue; 634 if (ret < 0) { 635 perror("recvmsg"); 636 continue; 637 } 638 if (ret == 0) { 639 fprintf(stderr, "client exited\n"); 640 goto cleanup; 641 } 642 643 for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) { 644 if (cm->cmsg_level != SOL_SOCKET || 645 (cm->cmsg_type != SCM_DEVMEM_DMABUF && 646 cm->cmsg_type != SCM_DEVMEM_LINEAR)) { 647 fprintf(stderr, "skipping non-devmem cmsg\n"); 648 continue; 649 } 650 651 dmabuf_cmsg = (struct dmabuf_cmsg *)CMSG_DATA(cm); 652 is_devmem = true; 653 654 if (cm->cmsg_type == SCM_DEVMEM_LINEAR) { 655 /* TODO: process data copied from skb's linear 656 * buffer. 657 */ 658 fprintf(stderr, 659 "SCM_DEVMEM_LINEAR. dmabuf_cmsg->frag_size=%u\n", 660 dmabuf_cmsg->frag_size); 661 662 continue; 663 } 664 665 token.token_start = dmabuf_cmsg->frag_token; 666 token.token_count = 1; 667 668 total_received += dmabuf_cmsg->frag_size; 669 fprintf(stderr, 670 "received frag_page=%llu, in_page_offset=%llu, frag_offset=%llu, frag_size=%u, token=%u, total_received=%lu, dmabuf_id=%u\n", 671 dmabuf_cmsg->frag_offset >> PAGE_SHIFT, 672 dmabuf_cmsg->frag_offset % getpagesize(), 673 dmabuf_cmsg->frag_offset, 674 dmabuf_cmsg->frag_size, dmabuf_cmsg->frag_token, 675 total_received, dmabuf_cmsg->dmabuf_id); 676 677 if (dmabuf_cmsg->dmabuf_id != dmabuf_id) 678 error(1, 0, 679 "received on wrong dmabuf_id: flow steering error\n"); 680 681 if (dmabuf_cmsg->frag_size % getpagesize()) 682 non_page_aligned_frags++; 683 else 684 page_aligned_frags++; 685 686 provider->memcpy_from_device(tmp_mem, mem, 687 dmabuf_cmsg->frag_offset, 688 dmabuf_cmsg->frag_size); 689 690 if (do_validation) 691 validate_buffer(tmp_mem, 692 dmabuf_cmsg->frag_size); 693 else 694 print_nonzero_bytes(tmp_mem, 695 dmabuf_cmsg->frag_size); 696 697 ret = setsockopt(client_fd, SOL_SOCKET, 698 SO_DEVMEM_DONTNEED, &token, 699 sizeof(token)); 700 if (ret != 1) 701 error(1, 0, 702 "SO_DEVMEM_DONTNEED not enough tokens"); 703 } 704 if (!is_devmem) 705 error(1, 0, "flow steering error\n"); 706 707 fprintf(stderr, "total_received=%lu\n", total_received); 708 } 709 710 fprintf(stderr, "%s: ok\n", TEST_PREFIX); 711 712 fprintf(stderr, "page_aligned_frags=%lu, non_page_aligned_frags=%lu\n", 713 page_aligned_frags, non_page_aligned_frags); 714 715 cleanup: 716 717 free(tmp_mem); 718 close(client_fd); 719 close(socket_fd); 720 ynl_sock_destroy(ys); 721 722 return 0; 723 } 724 725 void run_devmem_tests(void) 726 { 727 struct memory_buffer *mem; 728 struct ynl_sock *ys; 729 730 mem = provider->alloc(getpagesize() * NUM_PAGES); 731 732 /* Configure RSS to divert all traffic from our devmem queues */ 733 if (configure_rss()) 734 error(1, 0, "rss error\n"); 735 736 if (configure_headersplit(1)) 737 error(1, 0, "Failed to configure header split\n"); 738 739 if (!bind_rx_queue(ifindex, mem->fd, 740 calloc(num_queues, sizeof(struct netdev_queue_id)), 741 num_queues, &ys)) 742 error(1, 0, "Binding empty queues array should have failed\n"); 743 744 if (configure_headersplit(0)) 745 error(1, 0, "Failed to configure header split\n"); 746 747 if (!bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) 748 error(1, 0, "Configure dmabuf with header split off should have failed\n"); 749 750 if (configure_headersplit(1)) 751 error(1, 0, "Failed to configure header split\n"); 752 753 if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) 754 error(1, 0, "Failed to bind\n"); 755 756 /* Deactivating a bound queue should not be legal */ 757 if (!configure_channels(num_queues, num_queues - 1)) 758 error(1, 0, "Deactivating a bound queue should be illegal.\n"); 759 760 /* Closing the netlink socket does an implicit unbind */ 761 ynl_sock_destroy(ys); 762 763 provider->free(mem); 764 } 765 766 static uint64_t gettimeofday_ms(void) 767 { 768 struct timeval tv; 769 770 gettimeofday(&tv, NULL); 771 return (tv.tv_sec * 1000ULL) + (tv.tv_usec / 1000ULL); 772 } 773 774 static int do_poll(int fd) 775 { 776 struct pollfd pfd; 777 int ret; 778 779 pfd.revents = 0; 780 pfd.fd = fd; 781 782 ret = poll(&pfd, 1, waittime_ms); 783 if (ret == -1) 784 error(1, errno, "poll"); 785 786 return ret && (pfd.revents & POLLERR); 787 } 788 789 static void wait_compl(int fd) 790 { 791 int64_t tstop = gettimeofday_ms() + waittime_ms; 792 char control[CMSG_SPACE(100)] = {}; 793 struct sock_extended_err *serr; 794 struct msghdr msg = {}; 795 struct cmsghdr *cm; 796 __u32 hi, lo; 797 int ret; 798 799 msg.msg_control = control; 800 msg.msg_controllen = sizeof(control); 801 802 while (gettimeofday_ms() < tstop) { 803 if (!do_poll(fd)) 804 continue; 805 806 ret = recvmsg(fd, &msg, MSG_ERRQUEUE); 807 if (ret < 0) { 808 if (errno == EAGAIN) 809 continue; 810 error(1, errno, "recvmsg(MSG_ERRQUEUE)"); 811 return; 812 } 813 if (msg.msg_flags & MSG_CTRUNC) 814 error(1, 0, "MSG_CTRUNC\n"); 815 816 for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) { 817 if (cm->cmsg_level != SOL_IP && 818 cm->cmsg_level != SOL_IPV6) 819 continue; 820 if (cm->cmsg_level == SOL_IP && 821 cm->cmsg_type != IP_RECVERR) 822 continue; 823 if (cm->cmsg_level == SOL_IPV6 && 824 cm->cmsg_type != IPV6_RECVERR) 825 continue; 826 827 serr = (void *)CMSG_DATA(cm); 828 if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY) 829 error(1, 0, "wrong origin %u", serr->ee_origin); 830 if (serr->ee_errno != 0) 831 error(1, 0, "wrong errno %d", serr->ee_errno); 832 833 hi = serr->ee_data; 834 lo = serr->ee_info; 835 836 fprintf(stderr, "tx complete [%d,%d]\n", lo, hi); 837 return; 838 } 839 } 840 841 error(1, 0, "did not receive tx completion"); 842 } 843 844 static int do_client(struct memory_buffer *mem) 845 { 846 char ctrl_data[CMSG_SPACE(sizeof(__u32))]; 847 struct sockaddr_in6 server_sin; 848 struct sockaddr_in6 client_sin; 849 struct ynl_sock *ys = NULL; 850 struct iovec iov[MAX_IOV]; 851 struct msghdr msg = {}; 852 ssize_t line_size = 0; 853 struct cmsghdr *cmsg; 854 char *line = NULL; 855 unsigned long mid; 856 size_t len = 0; 857 int socket_fd; 858 __u32 ddmabuf; 859 int opt = 1; 860 int ret; 861 862 ret = parse_address(server_ip, atoi(port), &server_sin); 863 if (ret < 0) 864 error(1, 0, "parse server address"); 865 866 socket_fd = socket(AF_INET6, SOCK_STREAM, 0); 867 if (socket_fd < 0) 868 error(1, socket_fd, "create socket"); 869 870 enable_reuseaddr(socket_fd); 871 872 ret = setsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE, ifname, 873 strlen(ifname) + 1); 874 if (ret) 875 error(1, errno, "bindtodevice"); 876 877 if (bind_tx_queue(ifindex, mem->fd, &ys)) 878 error(1, 0, "Failed to bind\n"); 879 880 if (client_ip) { 881 ret = parse_address(client_ip, atoi(port), &client_sin); 882 if (ret < 0) 883 error(1, 0, "parse client address"); 884 885 ret = bind(socket_fd, &client_sin, sizeof(client_sin)); 886 if (ret) 887 error(1, errno, "bind"); 888 } 889 890 ret = setsockopt(socket_fd, SOL_SOCKET, SO_ZEROCOPY, &opt, sizeof(opt)); 891 if (ret) 892 error(1, errno, "set sock opt"); 893 894 fprintf(stderr, "Connect to %s %d (via %s)\n", server_ip, 895 ntohs(server_sin.sin6_port), ifname); 896 897 ret = connect(socket_fd, &server_sin, sizeof(server_sin)); 898 if (ret) 899 error(1, errno, "connect"); 900 901 while (1) { 902 free(line); 903 line = NULL; 904 line_size = getline(&line, &len, stdin); 905 906 if (line_size < 0) 907 break; 908 909 if (max_chunk) { 910 msg.msg_iovlen = 911 (line_size + max_chunk - 1) / max_chunk; 912 if (msg.msg_iovlen > MAX_IOV) 913 error(1, 0, 914 "can't partition %zd bytes into maximum of %d chunks", 915 line_size, MAX_IOV); 916 917 for (int i = 0; i < msg.msg_iovlen; i++) { 918 iov[i].iov_base = (void *)(i * max_chunk); 919 iov[i].iov_len = max_chunk; 920 } 921 922 iov[msg.msg_iovlen - 1].iov_len = 923 line_size - (msg.msg_iovlen - 1) * max_chunk; 924 } else { 925 iov[0].iov_base = 0; 926 iov[0].iov_len = line_size; 927 msg.msg_iovlen = 1; 928 } 929 930 msg.msg_iov = iov; 931 provider->memcpy_to_device(mem, 0, line, line_size); 932 933 msg.msg_control = ctrl_data; 934 msg.msg_controllen = sizeof(ctrl_data); 935 936 cmsg = CMSG_FIRSTHDR(&msg); 937 cmsg->cmsg_level = SOL_SOCKET; 938 cmsg->cmsg_type = SCM_DEVMEM_DMABUF; 939 cmsg->cmsg_len = CMSG_LEN(sizeof(__u32)); 940 941 ddmabuf = tx_dmabuf_id; 942 943 *((__u32 *)CMSG_DATA(cmsg)) = ddmabuf; 944 945 ret = sendmsg(socket_fd, &msg, MSG_ZEROCOPY); 946 if (ret < 0) 947 error(1, errno, "Failed sendmsg"); 948 949 fprintf(stderr, "sendmsg_ret=%d\n", ret); 950 951 if (ret != line_size) 952 error(1, errno, "Did not send all bytes %d vs %zd", ret, 953 line_size); 954 955 wait_compl(socket_fd); 956 } 957 958 fprintf(stderr, "%s: tx ok\n", TEST_PREFIX); 959 960 free(line); 961 close(socket_fd); 962 963 if (ys) 964 ynl_sock_destroy(ys); 965 966 return 0; 967 } 968 969 int main(int argc, char *argv[]) 970 { 971 struct memory_buffer *mem; 972 int is_server = 0, opt; 973 int ret; 974 975 while ((opt = getopt(argc, argv, "ls:c:p:v:q:t:f:z:")) != -1) { 976 switch (opt) { 977 case 'l': 978 is_server = 1; 979 break; 980 case 's': 981 server_ip = optarg; 982 break; 983 case 'c': 984 client_ip = optarg; 985 break; 986 case 'p': 987 port = optarg; 988 break; 989 case 'v': 990 do_validation = atoll(optarg); 991 break; 992 case 'q': 993 num_queues = atoi(optarg); 994 break; 995 case 't': 996 start_queue = atoi(optarg); 997 break; 998 case 'f': 999 ifname = optarg; 1000 break; 1001 case 'z': 1002 max_chunk = atoi(optarg); 1003 break; 1004 case '?': 1005 fprintf(stderr, "unknown option: %c\n", optopt); 1006 break; 1007 } 1008 } 1009 1010 if (!ifname) 1011 error(1, 0, "Missing -f argument\n"); 1012 1013 ifindex = if_nametoindex(ifname); 1014 1015 fprintf(stderr, "using ifindex=%u\n", ifindex); 1016 1017 if (!server_ip && !client_ip) { 1018 if (start_queue < 0 && num_queues < 0) { 1019 num_queues = rxq_num(ifindex); 1020 if (num_queues < 0) 1021 error(1, 0, "couldn't detect number of queues\n"); 1022 if (num_queues < 2) 1023 error(1, 0, 1024 "number of device queues is too low\n"); 1025 /* make sure can bind to multiple queues */ 1026 start_queue = num_queues / 2; 1027 num_queues /= 2; 1028 } 1029 1030 if (start_queue < 0 || num_queues < 0) 1031 error(1, 0, "Both -t and -q are required\n"); 1032 1033 run_devmem_tests(); 1034 return 0; 1035 } 1036 1037 if (start_queue < 0 && num_queues < 0) { 1038 num_queues = rxq_num(ifindex); 1039 if (num_queues < 2) 1040 error(1, 0, "number of device queues is too low\n"); 1041 1042 num_queues = 1; 1043 start_queue = rxq_num(ifindex) - num_queues; 1044 1045 if (start_queue < 0) 1046 error(1, 0, "couldn't detect number of queues\n"); 1047 1048 fprintf(stderr, "using queues %d..%d\n", start_queue, start_queue + num_queues); 1049 } 1050 1051 for (; optind < argc; optind++) 1052 fprintf(stderr, "extra arguments: %s\n", argv[optind]); 1053 1054 if (start_queue < 0) 1055 error(1, 0, "Missing -t argument\n"); 1056 1057 if (num_queues < 0) 1058 error(1, 0, "Missing -q argument\n"); 1059 1060 if (!server_ip) 1061 error(1, 0, "Missing -s argument\n"); 1062 1063 if (!port) 1064 error(1, 0, "Missing -p argument\n"); 1065 1066 mem = provider->alloc(getpagesize() * NUM_PAGES); 1067 ret = is_server ? do_server(mem) : do_client(mem); 1068 provider->free(mem); 1069 1070 return ret; 1071 } 1072