1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2017 Intel Corporation 3 */ 4 5 #include <arpa/inet.h> 6 #include <getopt.h> 7 #include <linux/if_ether.h> 8 #include <linux/if_vlan.h> 9 #include <linux/virtio_net.h> 10 #include <linux/virtio_ring.h> 11 #include <signal.h> 12 #include <stdint.h> 13 #include <sys/eventfd.h> 14 #include <sys/param.h> 15 #include <unistd.h> 16 17 #include <rte_atomic.h> 18 #include <rte_cycles.h> 19 #include <rte_ethdev.h> 20 #include <rte_log.h> 21 #include <rte_string_fns.h> 22 #include <rte_malloc.h> 23 #include <rte_vhost.h> 24 #include <rte_ip.h> 25 #include <rte_tcp.h> 26 #include <rte_pause.h> 27 28 #include "main.h" 29 30 #ifndef MAX_QUEUES 31 #define MAX_QUEUES 128 32 #endif 33 34 /* the maximum number of external ports supported */ 35 #define MAX_SUP_PORTS 1 36 37 #define MBUF_CACHE_SIZE 128 38 #define MBUF_DATA_SIZE RTE_MBUF_DEFAULT_BUF_SIZE 39 40 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */ 41 42 #define BURST_RX_WAIT_US 15 /* Defines how long we wait between retries on RX */ 43 #define BURST_RX_RETRIES 4 /* Number of retries on RX. */ 44 45 #define JUMBO_FRAME_MAX_SIZE 0x2600 46 47 /* State of virtio device. */ 48 #define DEVICE_MAC_LEARNING 0 49 #define DEVICE_RX 1 50 #define DEVICE_SAFE_REMOVE 2 51 52 /* Configurable number of RX/TX ring descriptors */ 53 #define RTE_TEST_RX_DESC_DEFAULT 1024 54 #define RTE_TEST_TX_DESC_DEFAULT 512 55 56 #define INVALID_PORT_ID 0xFF 57 58 /* Max number of devices. Limited by vmdq. */ 59 #define MAX_DEVICES 64 60 61 /* Size of buffers used for snprintfs. */ 62 #define MAX_PRINT_BUFF 6072 63 64 /* Maximum long option length for option parsing. */ 65 #define MAX_LONG_OPT_SZ 64 66 67 /* mask of enabled ports */ 68 static uint32_t enabled_port_mask = 0; 69 70 /* Promiscuous mode */ 71 static uint32_t promiscuous; 72 73 /* number of devices/queues to support*/ 74 static uint32_t num_queues = 0; 75 static uint32_t num_devices; 76 77 static struct rte_mempool *mbuf_pool; 78 static int mergeable; 79 80 /* Enable VM2VM communications. If this is disabled then the MAC address compare is skipped. */ 81 typedef enum { 82 VM2VM_DISABLED = 0, 83 VM2VM_SOFTWARE = 1, 84 VM2VM_HARDWARE = 2, 85 VM2VM_LAST 86 } vm2vm_type; 87 static vm2vm_type vm2vm_mode = VM2VM_SOFTWARE; 88 89 /* Enable stats. */ 90 static uint32_t enable_stats = 0; 91 /* Enable retries on RX. */ 92 static uint32_t enable_retry = 1; 93 94 /* Disable TX checksum offload */ 95 static uint32_t enable_tx_csum; 96 97 /* Disable TSO offload */ 98 static uint32_t enable_tso; 99 100 static int client_mode; 101 static int dequeue_zero_copy; 102 103 static int builtin_net_driver; 104 105 /* Specify timeout (in useconds) between retries on RX. */ 106 static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US; 107 /* Specify the number of retries on RX. */ 108 static uint32_t burst_rx_retry_num = BURST_RX_RETRIES; 109 110 /* Socket file paths. Can be set by user */ 111 static char *socket_files; 112 static int nb_sockets; 113 114 /* empty vmdq configuration structure. Filled in programatically */ 115 static struct rte_eth_conf vmdq_conf_default = { 116 .rxmode = { 117 .mq_mode = ETH_MQ_RX_VMDQ_ONLY, 118 .split_hdr_size = 0, 119 /* 120 * VLAN strip is necessary for 1G NIC such as I350, 121 * this fixes bug of ipv4 forwarding in guest can't 122 * forward pakets from one virtio dev to another virtio dev. 123 */ 124 .offloads = (DEV_RX_OFFLOAD_CRC_STRIP | 125 DEV_RX_OFFLOAD_VLAN_STRIP), 126 }, 127 128 .txmode = { 129 .mq_mode = ETH_MQ_TX_NONE, 130 .offloads = (DEV_TX_OFFLOAD_IPV4_CKSUM | 131 DEV_TX_OFFLOAD_TCP_CKSUM | 132 DEV_TX_OFFLOAD_VLAN_INSERT | 133 DEV_TX_OFFLOAD_MULTI_SEGS | 134 DEV_TX_OFFLOAD_TCP_TSO), 135 }, 136 .rx_adv_conf = { 137 /* 138 * should be overridden separately in code with 139 * appropriate values 140 */ 141 .vmdq_rx_conf = { 142 .nb_queue_pools = ETH_8_POOLS, 143 .enable_default_pool = 0, 144 .default_pool = 0, 145 .nb_pool_maps = 0, 146 .pool_map = {{0, 0},}, 147 }, 148 }, 149 }; 150 151 152 static unsigned lcore_ids[RTE_MAX_LCORE]; 153 static uint16_t ports[RTE_MAX_ETHPORTS]; 154 static unsigned num_ports = 0; /**< The number of ports specified in command line */ 155 static uint16_t num_pf_queues, num_vmdq_queues; 156 static uint16_t vmdq_pool_base, vmdq_queue_base; 157 static uint16_t queues_per_pool; 158 159 const uint16_t vlan_tags[] = { 160 1000, 1001, 1002, 1003, 1004, 1005, 1006, 1007, 161 1008, 1009, 1010, 1011, 1012, 1013, 1014, 1015, 162 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1023, 163 1024, 1025, 1026, 1027, 1028, 1029, 1030, 1031, 164 1032, 1033, 1034, 1035, 1036, 1037, 1038, 1039, 165 1040, 1041, 1042, 1043, 1044, 1045, 1046, 1047, 166 1048, 1049, 1050, 1051, 1052, 1053, 1054, 1055, 167 1056, 1057, 1058, 1059, 1060, 1061, 1062, 1063, 168 }; 169 170 /* ethernet addresses of ports */ 171 static struct ether_addr vmdq_ports_eth_addr[RTE_MAX_ETHPORTS]; 172 173 static struct vhost_dev_tailq_list vhost_dev_list = 174 TAILQ_HEAD_INITIALIZER(vhost_dev_list); 175 176 static struct lcore_info lcore_info[RTE_MAX_LCORE]; 177 178 /* Used for queueing bursts of TX packets. */ 179 struct mbuf_table { 180 unsigned len; 181 unsigned txq_id; 182 struct rte_mbuf *m_table[MAX_PKT_BURST]; 183 }; 184 185 /* TX queue for each data core. */ 186 struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE]; 187 188 #define MBUF_TABLE_DRAIN_TSC ((rte_get_tsc_hz() + US_PER_S - 1) \ 189 / US_PER_S * BURST_TX_DRAIN_US) 190 #define VLAN_HLEN 4 191 192 /* 193 * Builds up the correct configuration for VMDQ VLAN pool map 194 * according to the pool & queue limits. 195 */ 196 static inline int 197 get_eth_conf(struct rte_eth_conf *eth_conf, uint32_t num_devices) 198 { 199 struct rte_eth_vmdq_rx_conf conf; 200 struct rte_eth_vmdq_rx_conf *def_conf = 201 &vmdq_conf_default.rx_adv_conf.vmdq_rx_conf; 202 unsigned i; 203 204 memset(&conf, 0, sizeof(conf)); 205 conf.nb_queue_pools = (enum rte_eth_nb_pools)num_devices; 206 conf.nb_pool_maps = num_devices; 207 conf.enable_loop_back = def_conf->enable_loop_back; 208 conf.rx_mode = def_conf->rx_mode; 209 210 for (i = 0; i < conf.nb_pool_maps; i++) { 211 conf.pool_map[i].vlan_id = vlan_tags[ i ]; 212 conf.pool_map[i].pools = (1UL << i); 213 } 214 215 (void)(rte_memcpy(eth_conf, &vmdq_conf_default, sizeof(*eth_conf))); 216 (void)(rte_memcpy(ð_conf->rx_adv_conf.vmdq_rx_conf, &conf, 217 sizeof(eth_conf->rx_adv_conf.vmdq_rx_conf))); 218 return 0; 219 } 220 221 /* 222 * Validate the device number according to the max pool number gotten form 223 * dev_info. If the device number is invalid, give the error message and 224 * return -1. Each device must have its own pool. 225 */ 226 static inline int 227 validate_num_devices(uint32_t max_nb_devices) 228 { 229 if (num_devices > max_nb_devices) { 230 RTE_LOG(ERR, VHOST_PORT, "invalid number of devices\n"); 231 return -1; 232 } 233 return 0; 234 } 235 236 /* 237 * Initialises a given port using global settings and with the rx buffers 238 * coming from the mbuf_pool passed as parameter 239 */ 240 static inline int 241 port_init(uint16_t port) 242 { 243 struct rte_eth_dev_info dev_info; 244 struct rte_eth_conf port_conf; 245 struct rte_eth_rxconf *rxconf; 246 struct rte_eth_txconf *txconf; 247 int16_t rx_rings, tx_rings; 248 uint16_t rx_ring_size, tx_ring_size; 249 int retval; 250 uint16_t q; 251 252 /* The max pool number from dev_info will be used to validate the pool number specified in cmd line */ 253 rte_eth_dev_info_get (port, &dev_info); 254 255 rxconf = &dev_info.default_rxconf; 256 txconf = &dev_info.default_txconf; 257 rxconf->rx_drop_en = 1; 258 259 /*configure the number of supported virtio devices based on VMDQ limits */ 260 num_devices = dev_info.max_vmdq_pools; 261 262 rx_ring_size = RTE_TEST_RX_DESC_DEFAULT; 263 tx_ring_size = RTE_TEST_TX_DESC_DEFAULT; 264 265 /* 266 * When dequeue zero copy is enabled, guest Tx used vring will be 267 * updated only when corresponding mbuf is freed. Thus, the nb_tx_desc 268 * (tx_ring_size here) must be small enough so that the driver will 269 * hit the free threshold easily and free mbufs timely. Otherwise, 270 * guest Tx vring would be starved. 271 */ 272 if (dequeue_zero_copy) 273 tx_ring_size = 64; 274 275 tx_rings = (uint16_t)rte_lcore_count(); 276 277 retval = validate_num_devices(MAX_DEVICES); 278 if (retval < 0) 279 return retval; 280 281 /* Get port configuration. */ 282 retval = get_eth_conf(&port_conf, num_devices); 283 if (retval < 0) 284 return retval; 285 /* NIC queues are divided into pf queues and vmdq queues. */ 286 num_pf_queues = dev_info.max_rx_queues - dev_info.vmdq_queue_num; 287 queues_per_pool = dev_info.vmdq_queue_num / dev_info.max_vmdq_pools; 288 num_vmdq_queues = num_devices * queues_per_pool; 289 num_queues = num_pf_queues + num_vmdq_queues; 290 vmdq_queue_base = dev_info.vmdq_queue_base; 291 vmdq_pool_base = dev_info.vmdq_pool_base; 292 printf("pf queue num: %u, configured vmdq pool num: %u, each vmdq pool has %u queues\n", 293 num_pf_queues, num_devices, queues_per_pool); 294 295 if (!rte_eth_dev_is_valid_port(port)) 296 return -1; 297 298 rx_rings = (uint16_t)dev_info.max_rx_queues; 299 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE) 300 port_conf.txmode.offloads |= 301 DEV_TX_OFFLOAD_MBUF_FAST_FREE; 302 /* Configure ethernet device. */ 303 retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf); 304 if (retval != 0) { 305 RTE_LOG(ERR, VHOST_PORT, "Failed to configure port %u: %s.\n", 306 port, strerror(-retval)); 307 return retval; 308 } 309 310 retval = rte_eth_dev_adjust_nb_rx_tx_desc(port, &rx_ring_size, 311 &tx_ring_size); 312 if (retval != 0) { 313 RTE_LOG(ERR, VHOST_PORT, "Failed to adjust number of descriptors " 314 "for port %u: %s.\n", port, strerror(-retval)); 315 return retval; 316 } 317 if (rx_ring_size > RTE_TEST_RX_DESC_DEFAULT) { 318 RTE_LOG(ERR, VHOST_PORT, "Mbuf pool has an insufficient size " 319 "for Rx queues on port %u.\n", port); 320 return -1; 321 } 322 323 /* Setup the queues. */ 324 rxconf->offloads = port_conf.rxmode.offloads; 325 for (q = 0; q < rx_rings; q ++) { 326 retval = rte_eth_rx_queue_setup(port, q, rx_ring_size, 327 rte_eth_dev_socket_id(port), 328 rxconf, 329 mbuf_pool); 330 if (retval < 0) { 331 RTE_LOG(ERR, VHOST_PORT, 332 "Failed to setup rx queue %u of port %u: %s.\n", 333 q, port, strerror(-retval)); 334 return retval; 335 } 336 } 337 txconf->offloads = port_conf.txmode.offloads; 338 for (q = 0; q < tx_rings; q ++) { 339 retval = rte_eth_tx_queue_setup(port, q, tx_ring_size, 340 rte_eth_dev_socket_id(port), 341 txconf); 342 if (retval < 0) { 343 RTE_LOG(ERR, VHOST_PORT, 344 "Failed to setup tx queue %u of port %u: %s.\n", 345 q, port, strerror(-retval)); 346 return retval; 347 } 348 } 349 350 /* Start the device. */ 351 retval = rte_eth_dev_start(port); 352 if (retval < 0) { 353 RTE_LOG(ERR, VHOST_PORT, "Failed to start port %u: %s\n", 354 port, strerror(-retval)); 355 return retval; 356 } 357 358 if (promiscuous) 359 rte_eth_promiscuous_enable(port); 360 361 rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]); 362 RTE_LOG(INFO, VHOST_PORT, "Max virtio devices supported: %u\n", num_devices); 363 RTE_LOG(INFO, VHOST_PORT, "Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8 364 " %02"PRIx8" %02"PRIx8" %02"PRIx8"\n", 365 port, 366 vmdq_ports_eth_addr[port].addr_bytes[0], 367 vmdq_ports_eth_addr[port].addr_bytes[1], 368 vmdq_ports_eth_addr[port].addr_bytes[2], 369 vmdq_ports_eth_addr[port].addr_bytes[3], 370 vmdq_ports_eth_addr[port].addr_bytes[4], 371 vmdq_ports_eth_addr[port].addr_bytes[5]); 372 373 return 0; 374 } 375 376 /* 377 * Set socket file path. 378 */ 379 static int 380 us_vhost_parse_socket_path(const char *q_arg) 381 { 382 /* parse number string */ 383 if (strnlen(q_arg, PATH_MAX) == PATH_MAX) 384 return -1; 385 386 socket_files = realloc(socket_files, PATH_MAX * (nb_sockets + 1)); 387 snprintf(socket_files + nb_sockets * PATH_MAX, PATH_MAX, "%s", q_arg); 388 nb_sockets++; 389 390 return 0; 391 } 392 393 /* 394 * Parse the portmask provided at run time. 395 */ 396 static int 397 parse_portmask(const char *portmask) 398 { 399 char *end = NULL; 400 unsigned long pm; 401 402 errno = 0; 403 404 /* parse hexadecimal string */ 405 pm = strtoul(portmask, &end, 16); 406 if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) 407 return -1; 408 409 if (pm == 0) 410 return -1; 411 412 return pm; 413 414 } 415 416 /* 417 * Parse num options at run time. 418 */ 419 static int 420 parse_num_opt(const char *q_arg, uint32_t max_valid_value) 421 { 422 char *end = NULL; 423 unsigned long num; 424 425 errno = 0; 426 427 /* parse unsigned int string */ 428 num = strtoul(q_arg, &end, 10); 429 if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0') || (errno != 0)) 430 return -1; 431 432 if (num > max_valid_value) 433 return -1; 434 435 return num; 436 437 } 438 439 /* 440 * Display usage 441 */ 442 static void 443 us_vhost_usage(const char *prgname) 444 { 445 RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n" 446 " --vm2vm [0|1|2]\n" 447 " --rx_retry [0|1] --mergeable [0|1] --stats [0-N]\n" 448 " --socket-file <path>\n" 449 " --nb-devices ND\n" 450 " -p PORTMASK: Set mask for ports to be used by application\n" 451 " --vm2vm [0|1|2]: disable/software(default)/hardware vm2vm comms\n" 452 " --rx-retry [0|1]: disable/enable(default) retries on rx. Enable retry if destintation queue is full\n" 453 " --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX. This makes effect only if retries on rx enabled\n" 454 " --rx-retry-num [0-N]: the number of retries on rx. This makes effect only if retries on rx enabled\n" 455 " --mergeable [0|1]: disable(default)/enable RX mergeable buffers\n" 456 " --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n" 457 " --socket-file: The path of the socket file.\n" 458 " --tx-csum [0|1] disable/enable TX checksum offload.\n" 459 " --tso [0|1] disable/enable TCP segment offload.\n" 460 " --client register a vhost-user socket as client mode.\n" 461 " --dequeue-zero-copy enables dequeue zero copy\n", 462 prgname); 463 } 464 465 /* 466 * Parse the arguments given in the command line of the application. 467 */ 468 static int 469 us_vhost_parse_args(int argc, char **argv) 470 { 471 int opt, ret; 472 int option_index; 473 unsigned i; 474 const char *prgname = argv[0]; 475 static struct option long_option[] = { 476 {"vm2vm", required_argument, NULL, 0}, 477 {"rx-retry", required_argument, NULL, 0}, 478 {"rx-retry-delay", required_argument, NULL, 0}, 479 {"rx-retry-num", required_argument, NULL, 0}, 480 {"mergeable", required_argument, NULL, 0}, 481 {"stats", required_argument, NULL, 0}, 482 {"socket-file", required_argument, NULL, 0}, 483 {"tx-csum", required_argument, NULL, 0}, 484 {"tso", required_argument, NULL, 0}, 485 {"client", no_argument, &client_mode, 1}, 486 {"dequeue-zero-copy", no_argument, &dequeue_zero_copy, 1}, 487 {"builtin-net-driver", no_argument, &builtin_net_driver, 1}, 488 {NULL, 0, 0, 0}, 489 }; 490 491 /* Parse command line */ 492 while ((opt = getopt_long(argc, argv, "p:P", 493 long_option, &option_index)) != EOF) { 494 switch (opt) { 495 /* Portmask */ 496 case 'p': 497 enabled_port_mask = parse_portmask(optarg); 498 if (enabled_port_mask == 0) { 499 RTE_LOG(INFO, VHOST_CONFIG, "Invalid portmask\n"); 500 us_vhost_usage(prgname); 501 return -1; 502 } 503 break; 504 505 case 'P': 506 promiscuous = 1; 507 vmdq_conf_default.rx_adv_conf.vmdq_rx_conf.rx_mode = 508 ETH_VMDQ_ACCEPT_BROADCAST | 509 ETH_VMDQ_ACCEPT_MULTICAST; 510 511 break; 512 513 case 0: 514 /* Enable/disable vm2vm comms. */ 515 if (!strncmp(long_option[option_index].name, "vm2vm", 516 MAX_LONG_OPT_SZ)) { 517 ret = parse_num_opt(optarg, (VM2VM_LAST - 1)); 518 if (ret == -1) { 519 RTE_LOG(INFO, VHOST_CONFIG, 520 "Invalid argument for " 521 "vm2vm [0|1|2]\n"); 522 us_vhost_usage(prgname); 523 return -1; 524 } else { 525 vm2vm_mode = (vm2vm_type)ret; 526 } 527 } 528 529 /* Enable/disable retries on RX. */ 530 if (!strncmp(long_option[option_index].name, "rx-retry", MAX_LONG_OPT_SZ)) { 531 ret = parse_num_opt(optarg, 1); 532 if (ret == -1) { 533 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for rx-retry [0|1]\n"); 534 us_vhost_usage(prgname); 535 return -1; 536 } else { 537 enable_retry = ret; 538 } 539 } 540 541 /* Enable/disable TX checksum offload. */ 542 if (!strncmp(long_option[option_index].name, "tx-csum", MAX_LONG_OPT_SZ)) { 543 ret = parse_num_opt(optarg, 1); 544 if (ret == -1) { 545 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for tx-csum [0|1]\n"); 546 us_vhost_usage(prgname); 547 return -1; 548 } else 549 enable_tx_csum = ret; 550 } 551 552 /* Enable/disable TSO offload. */ 553 if (!strncmp(long_option[option_index].name, "tso", MAX_LONG_OPT_SZ)) { 554 ret = parse_num_opt(optarg, 1); 555 if (ret == -1) { 556 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for tso [0|1]\n"); 557 us_vhost_usage(prgname); 558 return -1; 559 } else 560 enable_tso = ret; 561 } 562 563 /* Specify the retries delay time (in useconds) on RX. */ 564 if (!strncmp(long_option[option_index].name, "rx-retry-delay", MAX_LONG_OPT_SZ)) { 565 ret = parse_num_opt(optarg, INT32_MAX); 566 if (ret == -1) { 567 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for rx-retry-delay [0-N]\n"); 568 us_vhost_usage(prgname); 569 return -1; 570 } else { 571 burst_rx_delay_time = ret; 572 } 573 } 574 575 /* Specify the retries number on RX. */ 576 if (!strncmp(long_option[option_index].name, "rx-retry-num", MAX_LONG_OPT_SZ)) { 577 ret = parse_num_opt(optarg, INT32_MAX); 578 if (ret == -1) { 579 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for rx-retry-num [0-N]\n"); 580 us_vhost_usage(prgname); 581 return -1; 582 } else { 583 burst_rx_retry_num = ret; 584 } 585 } 586 587 /* Enable/disable RX mergeable buffers. */ 588 if (!strncmp(long_option[option_index].name, "mergeable", MAX_LONG_OPT_SZ)) { 589 ret = parse_num_opt(optarg, 1); 590 if (ret == -1) { 591 RTE_LOG(INFO, VHOST_CONFIG, "Invalid argument for mergeable [0|1]\n"); 592 us_vhost_usage(prgname); 593 return -1; 594 } else { 595 mergeable = !!ret; 596 if (ret) { 597 vmdq_conf_default.rxmode.offloads |= 598 DEV_RX_OFFLOAD_JUMBO_FRAME; 599 vmdq_conf_default.rxmode.max_rx_pkt_len 600 = JUMBO_FRAME_MAX_SIZE; 601 } 602 } 603 } 604 605 /* Enable/disable stats. */ 606 if (!strncmp(long_option[option_index].name, "stats", MAX_LONG_OPT_SZ)) { 607 ret = parse_num_opt(optarg, INT32_MAX); 608 if (ret == -1) { 609 RTE_LOG(INFO, VHOST_CONFIG, 610 "Invalid argument for stats [0..N]\n"); 611 us_vhost_usage(prgname); 612 return -1; 613 } else { 614 enable_stats = ret; 615 } 616 } 617 618 /* Set socket file path. */ 619 if (!strncmp(long_option[option_index].name, 620 "socket-file", MAX_LONG_OPT_SZ)) { 621 if (us_vhost_parse_socket_path(optarg) == -1) { 622 RTE_LOG(INFO, VHOST_CONFIG, 623 "Invalid argument for socket name (Max %d characters)\n", 624 PATH_MAX); 625 us_vhost_usage(prgname); 626 return -1; 627 } 628 } 629 630 break; 631 632 /* Invalid option - print options. */ 633 default: 634 us_vhost_usage(prgname); 635 return -1; 636 } 637 } 638 639 for (i = 0; i < RTE_MAX_ETHPORTS; i++) { 640 if (enabled_port_mask & (1 << i)) 641 ports[num_ports++] = i; 642 } 643 644 if ((num_ports == 0) || (num_ports > MAX_SUP_PORTS)) { 645 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u," 646 "but only %u port can be enabled\n",num_ports, MAX_SUP_PORTS); 647 return -1; 648 } 649 650 return 0; 651 } 652 653 /* 654 * Update the global var NUM_PORTS and array PORTS according to system ports number 655 * and return valid ports number 656 */ 657 static unsigned check_ports_num(unsigned nb_ports) 658 { 659 unsigned valid_num_ports = num_ports; 660 unsigned portid; 661 662 if (num_ports > nb_ports) { 663 RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) exceeds total system port number(%u)\n", 664 num_ports, nb_ports); 665 num_ports = nb_ports; 666 } 667 668 for (portid = 0; portid < num_ports; portid ++) { 669 if (!rte_eth_dev_is_valid_port(ports[portid])) { 670 RTE_LOG(INFO, VHOST_PORT, 671 "\nSpecified port ID(%u) is not valid\n", 672 ports[portid]); 673 ports[portid] = INVALID_PORT_ID; 674 valid_num_ports--; 675 } 676 } 677 return valid_num_ports; 678 } 679 680 static __rte_always_inline struct vhost_dev * 681 find_vhost_dev(struct ether_addr *mac) 682 { 683 struct vhost_dev *vdev; 684 685 TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) { 686 if (vdev->ready == DEVICE_RX && 687 is_same_ether_addr(mac, &vdev->mac_address)) 688 return vdev; 689 } 690 691 return NULL; 692 } 693 694 /* 695 * This function learns the MAC address of the device and registers this along with a 696 * vlan tag to a VMDQ. 697 */ 698 static int 699 link_vmdq(struct vhost_dev *vdev, struct rte_mbuf *m) 700 { 701 struct ether_hdr *pkt_hdr; 702 int i, ret; 703 704 /* Learn MAC address of guest device from packet */ 705 pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); 706 707 if (find_vhost_dev(&pkt_hdr->s_addr)) { 708 RTE_LOG(ERR, VHOST_DATA, 709 "(%d) device is using a registered MAC!\n", 710 vdev->vid); 711 return -1; 712 } 713 714 for (i = 0; i < ETHER_ADDR_LEN; i++) 715 vdev->mac_address.addr_bytes[i] = pkt_hdr->s_addr.addr_bytes[i]; 716 717 /* vlan_tag currently uses the device_id. */ 718 vdev->vlan_tag = vlan_tags[vdev->vid]; 719 720 /* Print out VMDQ registration info. */ 721 RTE_LOG(INFO, VHOST_DATA, 722 "(%d) mac %02x:%02x:%02x:%02x:%02x:%02x and vlan %d registered\n", 723 vdev->vid, 724 vdev->mac_address.addr_bytes[0], vdev->mac_address.addr_bytes[1], 725 vdev->mac_address.addr_bytes[2], vdev->mac_address.addr_bytes[3], 726 vdev->mac_address.addr_bytes[4], vdev->mac_address.addr_bytes[5], 727 vdev->vlan_tag); 728 729 /* Register the MAC address. */ 730 ret = rte_eth_dev_mac_addr_add(ports[0], &vdev->mac_address, 731 (uint32_t)vdev->vid + vmdq_pool_base); 732 if (ret) 733 RTE_LOG(ERR, VHOST_DATA, 734 "(%d) failed to add device MAC address to VMDQ\n", 735 vdev->vid); 736 737 rte_eth_dev_set_vlan_strip_on_queue(ports[0], vdev->vmdq_rx_q, 1); 738 739 /* Set device as ready for RX. */ 740 vdev->ready = DEVICE_RX; 741 742 return 0; 743 } 744 745 /* 746 * Removes MAC address and vlan tag from VMDQ. Ensures that nothing is adding buffers to the RX 747 * queue before disabling RX on the device. 748 */ 749 static inline void 750 unlink_vmdq(struct vhost_dev *vdev) 751 { 752 unsigned i = 0; 753 unsigned rx_count; 754 struct rte_mbuf *pkts_burst[MAX_PKT_BURST]; 755 756 if (vdev->ready == DEVICE_RX) { 757 /*clear MAC and VLAN settings*/ 758 rte_eth_dev_mac_addr_remove(ports[0], &vdev->mac_address); 759 for (i = 0; i < 6; i++) 760 vdev->mac_address.addr_bytes[i] = 0; 761 762 vdev->vlan_tag = 0; 763 764 /*Clear out the receive buffers*/ 765 rx_count = rte_eth_rx_burst(ports[0], 766 (uint16_t)vdev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST); 767 768 while (rx_count) { 769 for (i = 0; i < rx_count; i++) 770 rte_pktmbuf_free(pkts_burst[i]); 771 772 rx_count = rte_eth_rx_burst(ports[0], 773 (uint16_t)vdev->vmdq_rx_q, pkts_burst, MAX_PKT_BURST); 774 } 775 776 vdev->ready = DEVICE_MAC_LEARNING; 777 } 778 } 779 780 static __rte_always_inline void 781 virtio_xmit(struct vhost_dev *dst_vdev, struct vhost_dev *src_vdev, 782 struct rte_mbuf *m) 783 { 784 uint16_t ret; 785 786 if (builtin_net_driver) { 787 ret = vs_enqueue_pkts(dst_vdev, VIRTIO_RXQ, &m, 1); 788 } else { 789 ret = rte_vhost_enqueue_burst(dst_vdev->vid, VIRTIO_RXQ, &m, 1); 790 } 791 792 if (enable_stats) { 793 rte_atomic64_inc(&dst_vdev->stats.rx_total_atomic); 794 rte_atomic64_add(&dst_vdev->stats.rx_atomic, ret); 795 src_vdev->stats.tx_total++; 796 src_vdev->stats.tx += ret; 797 } 798 } 799 800 /* 801 * Check if the packet destination MAC address is for a local device. If so then put 802 * the packet on that devices RX queue. If not then return. 803 */ 804 static __rte_always_inline int 805 virtio_tx_local(struct vhost_dev *vdev, struct rte_mbuf *m) 806 { 807 struct ether_hdr *pkt_hdr; 808 struct vhost_dev *dst_vdev; 809 810 pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); 811 812 dst_vdev = find_vhost_dev(&pkt_hdr->d_addr); 813 if (!dst_vdev) 814 return -1; 815 816 if (vdev->vid == dst_vdev->vid) { 817 RTE_LOG_DP(DEBUG, VHOST_DATA, 818 "(%d) TX: src and dst MAC is same. Dropping packet.\n", 819 vdev->vid); 820 return 0; 821 } 822 823 RTE_LOG_DP(DEBUG, VHOST_DATA, 824 "(%d) TX: MAC address is local\n", dst_vdev->vid); 825 826 if (unlikely(dst_vdev->remove)) { 827 RTE_LOG_DP(DEBUG, VHOST_DATA, 828 "(%d) device is marked for removal\n", dst_vdev->vid); 829 return 0; 830 } 831 832 virtio_xmit(dst_vdev, vdev, m); 833 return 0; 834 } 835 836 /* 837 * Check if the destination MAC of a packet is one local VM, 838 * and get its vlan tag, and offset if it is. 839 */ 840 static __rte_always_inline int 841 find_local_dest(struct vhost_dev *vdev, struct rte_mbuf *m, 842 uint32_t *offset, uint16_t *vlan_tag) 843 { 844 struct vhost_dev *dst_vdev; 845 struct ether_hdr *pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); 846 847 dst_vdev = find_vhost_dev(&pkt_hdr->d_addr); 848 if (!dst_vdev) 849 return 0; 850 851 if (vdev->vid == dst_vdev->vid) { 852 RTE_LOG_DP(DEBUG, VHOST_DATA, 853 "(%d) TX: src and dst MAC is same. Dropping packet.\n", 854 vdev->vid); 855 return -1; 856 } 857 858 /* 859 * HW vlan strip will reduce the packet length 860 * by minus length of vlan tag, so need restore 861 * the packet length by plus it. 862 */ 863 *offset = VLAN_HLEN; 864 *vlan_tag = vlan_tags[vdev->vid]; 865 866 RTE_LOG_DP(DEBUG, VHOST_DATA, 867 "(%d) TX: pkt to local VM device id: (%d), vlan tag: %u.\n", 868 vdev->vid, dst_vdev->vid, *vlan_tag); 869 870 return 0; 871 } 872 873 static uint16_t 874 get_psd_sum(void *l3_hdr, uint64_t ol_flags) 875 { 876 if (ol_flags & PKT_TX_IPV4) 877 return rte_ipv4_phdr_cksum(l3_hdr, ol_flags); 878 else /* assume ethertype == ETHER_TYPE_IPv6 */ 879 return rte_ipv6_phdr_cksum(l3_hdr, ol_flags); 880 } 881 882 static void virtio_tx_offload(struct rte_mbuf *m) 883 { 884 void *l3_hdr; 885 struct ipv4_hdr *ipv4_hdr = NULL; 886 struct tcp_hdr *tcp_hdr = NULL; 887 struct ether_hdr *eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *); 888 889 l3_hdr = (char *)eth_hdr + m->l2_len; 890 891 if (m->ol_flags & PKT_TX_IPV4) { 892 ipv4_hdr = l3_hdr; 893 ipv4_hdr->hdr_checksum = 0; 894 m->ol_flags |= PKT_TX_IP_CKSUM; 895 } 896 897 tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + m->l3_len); 898 tcp_hdr->cksum = get_psd_sum(l3_hdr, m->ol_flags); 899 } 900 901 static inline void 902 free_pkts(struct rte_mbuf **pkts, uint16_t n) 903 { 904 while (n--) 905 rte_pktmbuf_free(pkts[n]); 906 } 907 908 static __rte_always_inline void 909 do_drain_mbuf_table(struct mbuf_table *tx_q) 910 { 911 uint16_t count; 912 913 count = rte_eth_tx_burst(ports[0], tx_q->txq_id, 914 tx_q->m_table, tx_q->len); 915 if (unlikely(count < tx_q->len)) 916 free_pkts(&tx_q->m_table[count], tx_q->len - count); 917 918 tx_q->len = 0; 919 } 920 921 /* 922 * This function routes the TX packet to the correct interface. This 923 * may be a local device or the physical port. 924 */ 925 static __rte_always_inline void 926 virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m, uint16_t vlan_tag) 927 { 928 struct mbuf_table *tx_q; 929 unsigned offset = 0; 930 const uint16_t lcore_id = rte_lcore_id(); 931 struct ether_hdr *nh; 932 933 934 nh = rte_pktmbuf_mtod(m, struct ether_hdr *); 935 if (unlikely(is_broadcast_ether_addr(&nh->d_addr))) { 936 struct vhost_dev *vdev2; 937 938 TAILQ_FOREACH(vdev2, &vhost_dev_list, global_vdev_entry) { 939 if (vdev2 != vdev) 940 virtio_xmit(vdev2, vdev, m); 941 } 942 goto queue2nic; 943 } 944 945 /*check if destination is local VM*/ 946 if ((vm2vm_mode == VM2VM_SOFTWARE) && (virtio_tx_local(vdev, m) == 0)) { 947 rte_pktmbuf_free(m); 948 return; 949 } 950 951 if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) { 952 if (unlikely(find_local_dest(vdev, m, &offset, 953 &vlan_tag) != 0)) { 954 rte_pktmbuf_free(m); 955 return; 956 } 957 } 958 959 RTE_LOG_DP(DEBUG, VHOST_DATA, 960 "(%d) TX: MAC address is external\n", vdev->vid); 961 962 queue2nic: 963 964 /*Add packet to the port tx queue*/ 965 tx_q = &lcore_tx_queue[lcore_id]; 966 967 nh = rte_pktmbuf_mtod(m, struct ether_hdr *); 968 if (unlikely(nh->ether_type == rte_cpu_to_be_16(ETHER_TYPE_VLAN))) { 969 /* Guest has inserted the vlan tag. */ 970 struct vlan_hdr *vh = (struct vlan_hdr *) (nh + 1); 971 uint16_t vlan_tag_be = rte_cpu_to_be_16(vlan_tag); 972 if ((vm2vm_mode == VM2VM_HARDWARE) && 973 (vh->vlan_tci != vlan_tag_be)) 974 vh->vlan_tci = vlan_tag_be; 975 } else { 976 m->ol_flags |= PKT_TX_VLAN_PKT; 977 978 /* 979 * Find the right seg to adjust the data len when offset is 980 * bigger than tail room size. 981 */ 982 if (unlikely(vm2vm_mode == VM2VM_HARDWARE)) { 983 if (likely(offset <= rte_pktmbuf_tailroom(m))) 984 m->data_len += offset; 985 else { 986 struct rte_mbuf *seg = m; 987 988 while ((seg->next != NULL) && 989 (offset > rte_pktmbuf_tailroom(seg))) 990 seg = seg->next; 991 992 seg->data_len += offset; 993 } 994 m->pkt_len += offset; 995 } 996 997 m->vlan_tci = vlan_tag; 998 } 999 1000 if (m->ol_flags & PKT_TX_TCP_SEG) 1001 virtio_tx_offload(m); 1002 1003 tx_q->m_table[tx_q->len++] = m; 1004 if (enable_stats) { 1005 vdev->stats.tx_total++; 1006 vdev->stats.tx++; 1007 } 1008 1009 if (unlikely(tx_q->len == MAX_PKT_BURST)) 1010 do_drain_mbuf_table(tx_q); 1011 } 1012 1013 1014 static __rte_always_inline void 1015 drain_mbuf_table(struct mbuf_table *tx_q) 1016 { 1017 static uint64_t prev_tsc; 1018 uint64_t cur_tsc; 1019 1020 if (tx_q->len == 0) 1021 return; 1022 1023 cur_tsc = rte_rdtsc(); 1024 if (unlikely(cur_tsc - prev_tsc > MBUF_TABLE_DRAIN_TSC)) { 1025 prev_tsc = cur_tsc; 1026 1027 RTE_LOG_DP(DEBUG, VHOST_DATA, 1028 "TX queue drained after timeout with burst size %u\n", 1029 tx_q->len); 1030 do_drain_mbuf_table(tx_q); 1031 } 1032 } 1033 1034 static __rte_always_inline void 1035 drain_eth_rx(struct vhost_dev *vdev) 1036 { 1037 uint16_t rx_count, enqueue_count; 1038 struct rte_mbuf *pkts[MAX_PKT_BURST]; 1039 1040 rx_count = rte_eth_rx_burst(ports[0], vdev->vmdq_rx_q, 1041 pkts, MAX_PKT_BURST); 1042 if (!rx_count) 1043 return; 1044 1045 /* 1046 * When "enable_retry" is set, here we wait and retry when there 1047 * is no enough free slots in the queue to hold @rx_count packets, 1048 * to diminish packet loss. 1049 */ 1050 if (enable_retry && 1051 unlikely(rx_count > rte_vhost_avail_entries(vdev->vid, 1052 VIRTIO_RXQ))) { 1053 uint32_t retry; 1054 1055 for (retry = 0; retry < burst_rx_retry_num; retry++) { 1056 rte_delay_us(burst_rx_delay_time); 1057 if (rx_count <= rte_vhost_avail_entries(vdev->vid, 1058 VIRTIO_RXQ)) 1059 break; 1060 } 1061 } 1062 1063 if (builtin_net_driver) { 1064 enqueue_count = vs_enqueue_pkts(vdev, VIRTIO_RXQ, 1065 pkts, rx_count); 1066 } else { 1067 enqueue_count = rte_vhost_enqueue_burst(vdev->vid, VIRTIO_RXQ, 1068 pkts, rx_count); 1069 } 1070 if (enable_stats) { 1071 rte_atomic64_add(&vdev->stats.rx_total_atomic, rx_count); 1072 rte_atomic64_add(&vdev->stats.rx_atomic, enqueue_count); 1073 } 1074 1075 free_pkts(pkts, rx_count); 1076 } 1077 1078 static __rte_always_inline void 1079 drain_virtio_tx(struct vhost_dev *vdev) 1080 { 1081 struct rte_mbuf *pkts[MAX_PKT_BURST]; 1082 uint16_t count; 1083 uint16_t i; 1084 1085 if (builtin_net_driver) { 1086 count = vs_dequeue_pkts(vdev, VIRTIO_TXQ, mbuf_pool, 1087 pkts, MAX_PKT_BURST); 1088 } else { 1089 count = rte_vhost_dequeue_burst(vdev->vid, VIRTIO_TXQ, 1090 mbuf_pool, pkts, MAX_PKT_BURST); 1091 } 1092 1093 /* setup VMDq for the first packet */ 1094 if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && count) { 1095 if (vdev->remove || link_vmdq(vdev, pkts[0]) == -1) 1096 free_pkts(pkts, count); 1097 } 1098 1099 for (i = 0; i < count; ++i) 1100 virtio_tx_route(vdev, pkts[i], vlan_tags[vdev->vid]); 1101 } 1102 1103 /* 1104 * Main function of vhost-switch. It basically does: 1105 * 1106 * for each vhost device { 1107 * - drain_eth_rx() 1108 * 1109 * Which drains the host eth Rx queue linked to the vhost device, 1110 * and deliver all of them to guest virito Rx ring associated with 1111 * this vhost device. 1112 * 1113 * - drain_virtio_tx() 1114 * 1115 * Which drains the guest virtio Tx queue and deliver all of them 1116 * to the target, which could be another vhost device, or the 1117 * physical eth dev. The route is done in function "virtio_tx_route". 1118 * } 1119 */ 1120 static int 1121 switch_worker(void *arg __rte_unused) 1122 { 1123 unsigned i; 1124 unsigned lcore_id = rte_lcore_id(); 1125 struct vhost_dev *vdev; 1126 struct mbuf_table *tx_q; 1127 1128 RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id); 1129 1130 tx_q = &lcore_tx_queue[lcore_id]; 1131 for (i = 0; i < rte_lcore_count(); i++) { 1132 if (lcore_ids[i] == lcore_id) { 1133 tx_q->txq_id = i; 1134 break; 1135 } 1136 } 1137 1138 while(1) { 1139 drain_mbuf_table(tx_q); 1140 1141 /* 1142 * Inform the configuration core that we have exited the 1143 * linked list and that no devices are in use if requested. 1144 */ 1145 if (lcore_info[lcore_id].dev_removal_flag == REQUEST_DEV_REMOVAL) 1146 lcore_info[lcore_id].dev_removal_flag = ACK_DEV_REMOVAL; 1147 1148 /* 1149 * Process vhost devices 1150 */ 1151 TAILQ_FOREACH(vdev, &lcore_info[lcore_id].vdev_list, 1152 lcore_vdev_entry) { 1153 if (unlikely(vdev->remove)) { 1154 unlink_vmdq(vdev); 1155 vdev->ready = DEVICE_SAFE_REMOVE; 1156 continue; 1157 } 1158 1159 if (likely(vdev->ready == DEVICE_RX)) 1160 drain_eth_rx(vdev); 1161 1162 if (likely(!vdev->remove)) 1163 drain_virtio_tx(vdev); 1164 } 1165 } 1166 1167 return 0; 1168 } 1169 1170 /* 1171 * Remove a device from the specific data core linked list and from the 1172 * main linked list. Synchonization occurs through the use of the 1173 * lcore dev_removal_flag. Device is made volatile here to avoid re-ordering 1174 * of dev->remove=1 which can cause an infinite loop in the rte_pause loop. 1175 */ 1176 static void 1177 destroy_device(int vid) 1178 { 1179 struct vhost_dev *vdev = NULL; 1180 int lcore; 1181 1182 TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) { 1183 if (vdev->vid == vid) 1184 break; 1185 } 1186 if (!vdev) 1187 return; 1188 /*set the remove flag. */ 1189 vdev->remove = 1; 1190 while(vdev->ready != DEVICE_SAFE_REMOVE) { 1191 rte_pause(); 1192 } 1193 1194 if (builtin_net_driver) 1195 vs_vhost_net_remove(vdev); 1196 1197 TAILQ_REMOVE(&lcore_info[vdev->coreid].vdev_list, vdev, 1198 lcore_vdev_entry); 1199 TAILQ_REMOVE(&vhost_dev_list, vdev, global_vdev_entry); 1200 1201 1202 /* Set the dev_removal_flag on each lcore. */ 1203 RTE_LCORE_FOREACH_SLAVE(lcore) 1204 lcore_info[lcore].dev_removal_flag = REQUEST_DEV_REMOVAL; 1205 1206 /* 1207 * Once each core has set the dev_removal_flag to ACK_DEV_REMOVAL 1208 * we can be sure that they can no longer access the device removed 1209 * from the linked lists and that the devices are no longer in use. 1210 */ 1211 RTE_LCORE_FOREACH_SLAVE(lcore) { 1212 while (lcore_info[lcore].dev_removal_flag != ACK_DEV_REMOVAL) 1213 rte_pause(); 1214 } 1215 1216 lcore_info[vdev->coreid].device_num--; 1217 1218 RTE_LOG(INFO, VHOST_DATA, 1219 "(%d) device has been removed from data core\n", 1220 vdev->vid); 1221 1222 rte_free(vdev); 1223 } 1224 1225 /* 1226 * A new device is added to a data core. First the device is added to the main linked list 1227 * and the allocated to a specific data core. 1228 */ 1229 static int 1230 new_device(int vid) 1231 { 1232 int lcore, core_add = 0; 1233 uint32_t device_num_min = num_devices; 1234 struct vhost_dev *vdev; 1235 1236 vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE); 1237 if (vdev == NULL) { 1238 RTE_LOG(INFO, VHOST_DATA, 1239 "(%d) couldn't allocate memory for vhost dev\n", 1240 vid); 1241 return -1; 1242 } 1243 vdev->vid = vid; 1244 1245 if (builtin_net_driver) 1246 vs_vhost_net_setup(vdev); 1247 1248 TAILQ_INSERT_TAIL(&vhost_dev_list, vdev, global_vdev_entry); 1249 vdev->vmdq_rx_q = vid * queues_per_pool + vmdq_queue_base; 1250 1251 /*reset ready flag*/ 1252 vdev->ready = DEVICE_MAC_LEARNING; 1253 vdev->remove = 0; 1254 1255 /* Find a suitable lcore to add the device. */ 1256 RTE_LCORE_FOREACH_SLAVE(lcore) { 1257 if (lcore_info[lcore].device_num < device_num_min) { 1258 device_num_min = lcore_info[lcore].device_num; 1259 core_add = lcore; 1260 } 1261 } 1262 vdev->coreid = core_add; 1263 1264 TAILQ_INSERT_TAIL(&lcore_info[vdev->coreid].vdev_list, vdev, 1265 lcore_vdev_entry); 1266 lcore_info[vdev->coreid].device_num++; 1267 1268 /* Disable notifications. */ 1269 rte_vhost_enable_guest_notification(vid, VIRTIO_RXQ, 0); 1270 rte_vhost_enable_guest_notification(vid, VIRTIO_TXQ, 0); 1271 1272 RTE_LOG(INFO, VHOST_DATA, 1273 "(%d) device has been added to data core %d\n", 1274 vid, vdev->coreid); 1275 1276 return 0; 1277 } 1278 1279 /* 1280 * These callback allow devices to be added to the data core when configuration 1281 * has been fully complete. 1282 */ 1283 static const struct vhost_device_ops virtio_net_device_ops = 1284 { 1285 .new_device = new_device, 1286 .destroy_device = destroy_device, 1287 }; 1288 1289 /* 1290 * This is a thread will wake up after a period to print stats if the user has 1291 * enabled them. 1292 */ 1293 static void * 1294 print_stats(__rte_unused void *arg) 1295 { 1296 struct vhost_dev *vdev; 1297 uint64_t tx_dropped, rx_dropped; 1298 uint64_t tx, tx_total, rx, rx_total; 1299 const char clr[] = { 27, '[', '2', 'J', '\0' }; 1300 const char top_left[] = { 27, '[', '1', ';', '1', 'H','\0' }; 1301 1302 while(1) { 1303 sleep(enable_stats); 1304 1305 /* Clear screen and move to top left */ 1306 printf("%s%s\n", clr, top_left); 1307 printf("Device statistics =================================\n"); 1308 1309 TAILQ_FOREACH(vdev, &vhost_dev_list, global_vdev_entry) { 1310 tx_total = vdev->stats.tx_total; 1311 tx = vdev->stats.tx; 1312 tx_dropped = tx_total - tx; 1313 1314 rx_total = rte_atomic64_read(&vdev->stats.rx_total_atomic); 1315 rx = rte_atomic64_read(&vdev->stats.rx_atomic); 1316 rx_dropped = rx_total - rx; 1317 1318 printf("Statistics for device %d\n" 1319 "-----------------------\n" 1320 "TX total: %" PRIu64 "\n" 1321 "TX dropped: %" PRIu64 "\n" 1322 "TX successful: %" PRIu64 "\n" 1323 "RX total: %" PRIu64 "\n" 1324 "RX dropped: %" PRIu64 "\n" 1325 "RX successful: %" PRIu64 "\n", 1326 vdev->vid, 1327 tx_total, tx_dropped, tx, 1328 rx_total, rx_dropped, rx); 1329 } 1330 1331 printf("===================================================\n"); 1332 } 1333 1334 return NULL; 1335 } 1336 1337 static void 1338 unregister_drivers(int socket_num) 1339 { 1340 int i, ret; 1341 1342 for (i = 0; i < socket_num; i++) { 1343 ret = rte_vhost_driver_unregister(socket_files + i * PATH_MAX); 1344 if (ret != 0) 1345 RTE_LOG(ERR, VHOST_CONFIG, 1346 "Fail to unregister vhost driver for %s.\n", 1347 socket_files + i * PATH_MAX); 1348 } 1349 } 1350 1351 /* When we receive a INT signal, unregister vhost driver */ 1352 static void 1353 sigint_handler(__rte_unused int signum) 1354 { 1355 /* Unregister vhost driver. */ 1356 unregister_drivers(nb_sockets); 1357 1358 exit(0); 1359 } 1360 1361 /* 1362 * While creating an mbuf pool, one key thing is to figure out how 1363 * many mbuf entries is enough for our use. FYI, here are some 1364 * guidelines: 1365 * 1366 * - Each rx queue would reserve @nr_rx_desc mbufs at queue setup stage 1367 * 1368 * - For each switch core (A CPU core does the packet switch), we need 1369 * also make some reservation for receiving the packets from virtio 1370 * Tx queue. How many is enough depends on the usage. It's normally 1371 * a simple calculation like following: 1372 * 1373 * MAX_PKT_BURST * max packet size / mbuf size 1374 * 1375 * So, we definitely need allocate more mbufs when TSO is enabled. 1376 * 1377 * - Similarly, for each switching core, we should serve @nr_rx_desc 1378 * mbufs for receiving the packets from physical NIC device. 1379 * 1380 * - We also need make sure, for each switch core, we have allocated 1381 * enough mbufs to fill up the mbuf cache. 1382 */ 1383 static void 1384 create_mbuf_pool(uint16_t nr_port, uint32_t nr_switch_core, uint32_t mbuf_size, 1385 uint32_t nr_queues, uint32_t nr_rx_desc, uint32_t nr_mbuf_cache) 1386 { 1387 uint32_t nr_mbufs; 1388 uint32_t nr_mbufs_per_core; 1389 uint32_t mtu = 1500; 1390 1391 if (mergeable) 1392 mtu = 9000; 1393 if (enable_tso) 1394 mtu = 64 * 1024; 1395 1396 nr_mbufs_per_core = (mtu + mbuf_size) * MAX_PKT_BURST / 1397 (mbuf_size - RTE_PKTMBUF_HEADROOM); 1398 nr_mbufs_per_core += nr_rx_desc; 1399 nr_mbufs_per_core = RTE_MAX(nr_mbufs_per_core, nr_mbuf_cache); 1400 1401 nr_mbufs = nr_queues * nr_rx_desc; 1402 nr_mbufs += nr_mbufs_per_core * nr_switch_core; 1403 nr_mbufs *= nr_port; 1404 1405 mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", nr_mbufs, 1406 nr_mbuf_cache, 0, mbuf_size, 1407 rte_socket_id()); 1408 if (mbuf_pool == NULL) 1409 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n"); 1410 } 1411 1412 /* 1413 * Main function, does initialisation and calls the per-lcore functions. 1414 */ 1415 int 1416 main(int argc, char *argv[]) 1417 { 1418 unsigned lcore_id, core_id = 0; 1419 unsigned nb_ports, valid_num_ports; 1420 int ret, i; 1421 uint16_t portid; 1422 static pthread_t tid; 1423 uint64_t flags = 0; 1424 1425 signal(SIGINT, sigint_handler); 1426 1427 /* init EAL */ 1428 ret = rte_eal_init(argc, argv); 1429 if (ret < 0) 1430 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n"); 1431 argc -= ret; 1432 argv += ret; 1433 1434 /* parse app arguments */ 1435 ret = us_vhost_parse_args(argc, argv); 1436 if (ret < 0) 1437 rte_exit(EXIT_FAILURE, "Invalid argument\n"); 1438 1439 for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) { 1440 TAILQ_INIT(&lcore_info[lcore_id].vdev_list); 1441 1442 if (rte_lcore_is_enabled(lcore_id)) 1443 lcore_ids[core_id++] = lcore_id; 1444 } 1445 1446 if (rte_lcore_count() > RTE_MAX_LCORE) 1447 rte_exit(EXIT_FAILURE,"Not enough cores\n"); 1448 1449 /* Get the number of physical ports. */ 1450 nb_ports = rte_eth_dev_count_avail(); 1451 1452 /* 1453 * Update the global var NUM_PORTS and global array PORTS 1454 * and get value of var VALID_NUM_PORTS according to system ports number 1455 */ 1456 valid_num_ports = check_ports_num(nb_ports); 1457 1458 if ((valid_num_ports == 0) || (valid_num_ports > MAX_SUP_PORTS)) { 1459 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u," 1460 "but only %u port can be enabled\n",num_ports, MAX_SUP_PORTS); 1461 return -1; 1462 } 1463 1464 /* 1465 * FIXME: here we are trying to allocate mbufs big enough for 1466 * @MAX_QUEUES, but the truth is we're never going to use that 1467 * many queues here. We probably should only do allocation for 1468 * those queues we are going to use. 1469 */ 1470 create_mbuf_pool(valid_num_ports, rte_lcore_count() - 1, MBUF_DATA_SIZE, 1471 MAX_QUEUES, RTE_TEST_RX_DESC_DEFAULT, MBUF_CACHE_SIZE); 1472 1473 if (vm2vm_mode == VM2VM_HARDWARE) { 1474 /* Enable VT loop back to let L2 switch to do it. */ 1475 vmdq_conf_default.rx_adv_conf.vmdq_rx_conf.enable_loop_back = 1; 1476 RTE_LOG(DEBUG, VHOST_CONFIG, 1477 "Enable loop back for L2 switch in vmdq.\n"); 1478 } 1479 1480 /* initialize all ports */ 1481 RTE_ETH_FOREACH_DEV(portid) { 1482 /* skip ports that are not enabled */ 1483 if ((enabled_port_mask & (1 << portid)) == 0) { 1484 RTE_LOG(INFO, VHOST_PORT, 1485 "Skipping disabled port %d\n", portid); 1486 continue; 1487 } 1488 if (port_init(portid) != 0) 1489 rte_exit(EXIT_FAILURE, 1490 "Cannot initialize network ports\n"); 1491 } 1492 1493 /* Enable stats if the user option is set. */ 1494 if (enable_stats) { 1495 ret = rte_ctrl_thread_create(&tid, "print-stats", NULL, 1496 print_stats, NULL); 1497 if (ret < 0) 1498 rte_exit(EXIT_FAILURE, 1499 "Cannot create print-stats thread\n"); 1500 } 1501 1502 /* Launch all data cores. */ 1503 RTE_LCORE_FOREACH_SLAVE(lcore_id) 1504 rte_eal_remote_launch(switch_worker, NULL, lcore_id); 1505 1506 if (client_mode) 1507 flags |= RTE_VHOST_USER_CLIENT; 1508 1509 if (dequeue_zero_copy) 1510 flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY; 1511 1512 /* Register vhost user driver to handle vhost messages. */ 1513 for (i = 0; i < nb_sockets; i++) { 1514 char *file = socket_files + i * PATH_MAX; 1515 ret = rte_vhost_driver_register(file, flags); 1516 if (ret != 0) { 1517 unregister_drivers(i); 1518 rte_exit(EXIT_FAILURE, 1519 "vhost driver register failure.\n"); 1520 } 1521 1522 if (builtin_net_driver) 1523 rte_vhost_driver_set_features(file, VIRTIO_NET_FEATURES); 1524 1525 if (mergeable == 0) { 1526 rte_vhost_driver_disable_features(file, 1527 1ULL << VIRTIO_NET_F_MRG_RXBUF); 1528 } 1529 1530 if (enable_tx_csum == 0) { 1531 rte_vhost_driver_disable_features(file, 1532 1ULL << VIRTIO_NET_F_CSUM); 1533 } 1534 1535 if (enable_tso == 0) { 1536 rte_vhost_driver_disable_features(file, 1537 1ULL << VIRTIO_NET_F_HOST_TSO4); 1538 rte_vhost_driver_disable_features(file, 1539 1ULL << VIRTIO_NET_F_HOST_TSO6); 1540 rte_vhost_driver_disable_features(file, 1541 1ULL << VIRTIO_NET_F_GUEST_TSO4); 1542 rte_vhost_driver_disable_features(file, 1543 1ULL << VIRTIO_NET_F_GUEST_TSO6); 1544 } 1545 1546 if (promiscuous) { 1547 rte_vhost_driver_enable_features(file, 1548 1ULL << VIRTIO_NET_F_CTRL_RX); 1549 } 1550 1551 ret = rte_vhost_driver_callback_register(file, 1552 &virtio_net_device_ops); 1553 if (ret != 0) { 1554 rte_exit(EXIT_FAILURE, 1555 "failed to register vhost driver callbacks.\n"); 1556 } 1557 1558 if (rte_vhost_driver_start(file) < 0) { 1559 rte_exit(EXIT_FAILURE, 1560 "failed to start vhost driver.\n"); 1561 } 1562 } 1563 1564 RTE_LCORE_FOREACH_SLAVE(lcore_id) 1565 rte_eal_wait_lcore(lcore_id); 1566 1567 return 0; 1568 1569 } 1570