examples/tep_termination/main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2015 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_pause.h>
  25
  26 #include "main.h"
  27 #include "vxlan.h"
  28 #include "vxlan_setup.h"
  29
  30 /* the maximum number of external ports supported */
  31 #define MAX_SUP_PORTS 1
  32
  33 /**
  34  * Calculate the number of buffers needed per port
  35  */
  36 #define NUM_MBUFS_PER_PORT ((MAX_QUEUES * RTE_TEST_RX_DESC_DEFAULT) +\
  37                                 (nb_switching_cores * MAX_PKT_BURST) +\
  38                                 (nb_switching_cores * \
  39                                 RTE_TEST_TX_DESC_DEFAULT) +\
  40                                 (nb_switching_cores * MBUF_CACHE_SIZE))
  41
  42 #define MBUF_CACHE_SIZE 128
  43 #define MBUF_DATA_SIZE RTE_MBUF_DEFAULT_BUF_SIZE
  44
  45 #define MAX_PKT_BURST 32        /* Max burst size for RX/TX */
  46 #define BURST_TX_DRAIN_US 100   /* TX drain every ~100us */
  47
  48 /* Defines how long we wait between retries on RX */
  49 #define BURST_RX_WAIT_US 15
  50
  51 #define BURST_RX_RETRIES 4      /* Number of retries on RX. */
  52
  53 #define JUMBO_FRAME_MAX_SIZE    0x2600
  54
  55 /* Config_core_flag status definitions. */
  56 #define REQUEST_DEV_REMOVAL 1
  57 #define ACK_DEV_REMOVAL     0
  58
  59 /* Configurable number of RX/TX ring descriptors */
  60 #define RTE_TEST_RX_DESC_DEFAULT 1024
  61 #define RTE_TEST_TX_DESC_DEFAULT 512
  62
  63 /* Get first 4 bytes in mbuf headroom. */
  64 #define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \
  65                 + sizeof(struct rte_mbuf)))
  66
  67 #define INVALID_PORT_ID 0xFFFF
  68
  69 /* Maximum character device basename size. */
  70 #define MAX_BASENAME_SZ 20
  71
  72 /* Maximum long option length for option parsing. */
  73 #define MAX_LONG_OPT_SZ 64
  74
  75 /* Used to compare MAC addresses. */
  76 #define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
  77
  78 #define CMD_LINE_OPT_NB_DEVICES "nb-devices"
  79 #define CMD_LINE_OPT_UDP_PORT "udp-port"
  80 #define CMD_LINE_OPT_TX_CHECKSUM "tx-checksum"
  81 #define CMD_LINE_OPT_TSO_SEGSZ "tso-segsz"
  82 #define CMD_LINE_OPT_FILTER_TYPE "filter-type"
  83 #define CMD_LINE_OPT_ENCAP "encap"
  84 #define CMD_LINE_OPT_DECAP "decap"
  85 #define CMD_LINE_OPT_RX_RETRY "rx-retry"
  86 #define CMD_LINE_OPT_RX_RETRY_DELAY "rx-retry-delay"
  87 #define CMD_LINE_OPT_RX_RETRY_NUM "rx-retry-num"
  88 #define CMD_LINE_OPT_STATS "stats"
  89 #define CMD_LINE_OPT_DEV_BASENAME "dev-basename"
  90
  91 /* mask of enabled ports */
  92 static uint32_t enabled_port_mask;
  93
  94 /*Number of switching cores enabled*/
  95 static uint32_t nb_switching_cores;
  96
  97 /* number of devices/queues to support*/
  98 uint16_t nb_devices = 2;
  99
 100 /* max ring descriptor, ixgbe, i40e, e1000 all are 4096. */
 101 #define MAX_RING_DESC 4096
 102
 103 struct vpool {
 104         struct rte_mempool *pool;
 105         struct rte_ring *ring;
 106         uint32_t buf_size;
 107 } vpool_array[MAX_QUEUES+MAX_QUEUES];
 108
 109 /* UDP tunneling port */
 110 uint16_t udp_port = 4789;
 111
 112 /* enable/disable inner TX checksum */
 113 uint8_t tx_checksum = 0;
 114
 115 /* TCP segment size */
 116 uint16_t tso_segsz = 0;
 117
 118 /* enable/disable decapsulation */
 119 uint8_t rx_decap = 1;
 120
 121 /* enable/disable encapsulation */
 122 uint8_t tx_encap = 1;
 123
 124 /* RX filter type for tunneling packet */
 125 uint8_t filter_idx = 1;
 126
 127 /* overlay packet operation */
 128 struct ol_switch_ops overlay_options = {
 129         .port_configure = vxlan_port_init,
 130         .tunnel_setup = vxlan_link,
 131         .tunnel_destroy = vxlan_unlink,
 132         .tx_handle = vxlan_tx_pkts,
 133         .rx_handle = vxlan_rx_pkts,
 134         .param_handle = NULL,
 135 };
 136
 137 /* Enable stats. */
 138 uint32_t enable_stats = 0;
 139 /* Enable retries on RX. */
 140 static uint32_t enable_retry = 1;
 141 /* Specify timeout (in useconds) between retries on RX. */
 142 static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
 143 /* Specify the number of retries on RX. */
 144 static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
 145
 146 /* Character device basename. Can be set by user. */
 147 static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
 148
 149 static unsigned lcore_ids[RTE_MAX_LCORE];
 150 uint16_t ports[RTE_MAX_ETHPORTS];
 151
 152 static unsigned nb_ports; /**< The number of ports specified in command line */
 153
 154 /* ethernet addresses of ports */
 155 struct rte_ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
 156
 157 /* heads for the main used and free linked lists for the data path. */
 158 static struct virtio_net_data_ll *ll_root_used;
 159 static struct virtio_net_data_ll *ll_root_free;
 160
 161 /**
 162  * Array of data core structures containing information on
 163  * individual core linked lists.
 164  */
 165 static struct lcore_info lcore_info[RTE_MAX_LCORE];
 166
 167 /* Used for queueing bursts of TX packets. */
 168 struct mbuf_table {
 169         unsigned len;
 170         unsigned txq_id;
 171         struct rte_mbuf *m_table[MAX_PKT_BURST];
 172 };
 173
 174 /* TX queue for each data core. */
 175 struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
 176
 177 struct device_statistics dev_statistics[MAX_DEVICES];
 178
 179 /**
 180  * Set character device basename.
 181  */
 182 static int
 183 us_vhost_parse_basename(const char *q_arg)
 184 {
 185         /* parse number string */
 186         if (strlen(q_arg) >= MAX_BASENAME_SZ)
 187                 return -1;
 188         else
 189                 strlcpy((char *)&dev_basename, q_arg, MAX_BASENAME_SZ);
 190
 191         return 0;
 192 }
 193
 194 /**
 195  * Parse the portmask provided at run time.
 196  */
 197 static int
 198 parse_portmask(const char *portmask)
 199 {
 200         char *end = NULL;
 201         unsigned long pm;
 202
 203         /* parse hexadecimal string */
 204         pm = strtoul(portmask, &end, 16);
 205         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 206                 return 0;
 207
 208         return pm;
 209 }
 210
 211 /**
 212  * Parse num options at run time.
 213  */
 214 static int
 215 parse_num_opt(const char *q_arg, uint32_t max_valid_value)
 216 {
 217         char *end = NULL;
 218         unsigned long num;
 219
 220         /* parse unsigned int string */
 221         num = strtoul(q_arg, &end, 10);
 222         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 223                 return -1;
 224
 225         if (num > max_valid_value)
 226                 return -1;
 227
 228         return num;
 229 }
 230
 231 /**
 232  * Display usage
 233  */
 234 static void
 235 tep_termination_usage(const char *prgname)
 236 {
 237         RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
 238         "               --udp-port: UDP destination port for VXLAN packet\n"
 239         "               --nb-devices[1-64]: The number of virtIO device\n"
 240         "               --tx-checksum [0|1]: inner Tx checksum offload\n"
 241         "               --tso-segsz [0-N]: TCP segment size\n"
 242         "               --decap [0|1]: tunneling packet decapsulation\n"
 243         "               --encap [0|1]: tunneling packet encapsulation\n"
 244         "               --filter-type[1-3]: filter type for tunneling packet\n"
 245         "                   1: Inner MAC and tenent ID\n"
 246         "                   2: Inner MAC and VLAN, and tenent ID\n"
 247         "                   3: Outer MAC, Inner MAC and tenent ID\n"
 248         "               -p PORTMASK: Set mask for ports to be used by application\n"
 249         "               --rx-retry [0|1]: disable/enable(default) retries on rx."
 250         "                Enable retry if destintation queue is full\n"
 251         "               --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX."
 252         "                This makes effect only if retries on rx enabled\n"
 253         "               --rx-retry-num [0-N]: the number of retries on rx."
 254         "                This makes effect only if retries on rx enabled\n"
 255         "               --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
 256         "               --dev-basename: The basename to be used for the character device.\n",
 257                prgname);
 258 }
 259
 260 /**
 261  * Parse the arguments given in the command line of the application.
 262  */
 263 static int
 264 tep_termination_parse_args(int argc, char **argv)
 265 {
 266         int opt, ret;
 267         int option_index;
 268         unsigned i;
 269         const char *prgname = argv[0];
 270         static struct option long_option[] = {
 271                 {CMD_LINE_OPT_NB_DEVICES, required_argument, NULL, 0},
 272                 {CMD_LINE_OPT_UDP_PORT, required_argument, NULL, 0},
 273                 {CMD_LINE_OPT_TX_CHECKSUM, required_argument, NULL, 0},
 274                 {CMD_LINE_OPT_TSO_SEGSZ, required_argument, NULL, 0},
 275                 {CMD_LINE_OPT_DECAP, required_argument, NULL, 0},
 276                 {CMD_LINE_OPT_ENCAP, required_argument, NULL, 0},
 277                 {CMD_LINE_OPT_FILTER_TYPE, required_argument, NULL, 0},
 278                 {CMD_LINE_OPT_RX_RETRY, required_argument, NULL, 0},
 279                 {CMD_LINE_OPT_RX_RETRY_DELAY, required_argument, NULL, 0},
 280                 {CMD_LINE_OPT_RX_RETRY_NUM, required_argument, NULL, 0},
 281                 {CMD_LINE_OPT_STATS, required_argument, NULL, 0},
 282                 {CMD_LINE_OPT_DEV_BASENAME, required_argument, NULL, 0},
 283                 {NULL, 0, 0, 0},
 284         };
 285
 286         /* Parse command line */
 287         while ((opt = getopt_long(argc, argv, "p:",
 288                         long_option, &option_index)) != EOF) {
 289                 switch (opt) {
 290                 /* Portmask */
 291                 case 'p':
 292                         enabled_port_mask = parse_portmask(optarg);
 293                         if (enabled_port_mask == 0) {
 294                                 RTE_LOG(INFO, VHOST_CONFIG,
 295                                         "Invalid portmask\n");
 296                                 tep_termination_usage(prgname);
 297                                 return -1;
 298                         }
 299                         break;
 300                 case 0:
 301                         if (!strncmp(long_option[option_index].name,
 302                                 CMD_LINE_OPT_NB_DEVICES,
 303                                 sizeof(CMD_LINE_OPT_NB_DEVICES))) {
 304                                 ret = parse_num_opt(optarg, MAX_DEVICES);
 305                                 if (ret == -1) {
 306                                         RTE_LOG(INFO, VHOST_CONFIG,
 307                                         "Invalid argument for nb-devices [0-%d]\n",
 308                                         MAX_DEVICES);
 309                                         tep_termination_usage(prgname);
 310                                         return -1;
 311                                 } else
 312                                         nb_devices = ret;
 313                         }
 314
 315                         /* Enable/disable retries on RX. */
 316                         if (!strncmp(long_option[option_index].name,
 317                                 CMD_LINE_OPT_RX_RETRY,
 318                                 sizeof(CMD_LINE_OPT_RX_RETRY))) {
 319                                 ret = parse_num_opt(optarg, 1);
 320                                 if (ret == -1) {
 321                                         RTE_LOG(INFO, VHOST_CONFIG,
 322                                                 "Invalid argument for rx-retry [0|1]\n");
 323                                         tep_termination_usage(prgname);
 324                                         return -1;
 325                                 } else
 326                                         enable_retry = ret;
 327                         }
 328
 329                         if (!strncmp(long_option[option_index].name,
 330                                 CMD_LINE_OPT_TSO_SEGSZ,
 331                                 sizeof(CMD_LINE_OPT_TSO_SEGSZ))) {
 332                                 ret = parse_num_opt(optarg, INT16_MAX);
 333                                 if (ret == -1) {
 334                                         RTE_LOG(INFO, VHOST_CONFIG,
 335                                                 "Invalid argument for TCP segment size [0-N]\n");
 336                                         tep_termination_usage(prgname);
 337                                         return -1;
 338                                 } else
 339                                         tso_segsz = ret;
 340                         }
 341
 342                         if (!strncmp(long_option[option_index].name,
 343                                         CMD_LINE_OPT_UDP_PORT,
 344                                         sizeof(CMD_LINE_OPT_UDP_PORT))) {
 345                                 ret = parse_num_opt(optarg, INT16_MAX);
 346                                 if (ret == -1) {
 347                                         RTE_LOG(INFO, VHOST_CONFIG,
 348                                                 "Invalid argument for UDP port [0-N]\n");
 349                                         tep_termination_usage(prgname);
 350                                         return -1;
 351                                 } else
 352                                         udp_port = ret;
 353                         }
 354
 355                         /* Specify the retries delay time (in useconds) on RX.*/
 356                         if (!strncmp(long_option[option_index].name,
 357                                 CMD_LINE_OPT_RX_RETRY_DELAY,
 358                                 sizeof(CMD_LINE_OPT_RX_RETRY_DELAY))) {
 359                                 ret = parse_num_opt(optarg, INT32_MAX);
 360                                 if (ret == -1) {
 361                                         RTE_LOG(INFO, VHOST_CONFIG,
 362                                                 "Invalid argument for rx-retry-delay [0-N]\n");
 363                                         tep_termination_usage(prgname);
 364                                         return -1;
 365                                 } else
 366                                         burst_rx_delay_time = ret;
 367                         }
 368
 369                         /* Specify the retries number on RX. */
 370                         if (!strncmp(long_option[option_index].name,
 371                                 CMD_LINE_OPT_RX_RETRY_NUM,
 372                                 sizeof(CMD_LINE_OPT_RX_RETRY_NUM))) {
 373                                 ret = parse_num_opt(optarg, INT32_MAX);
 374                                 if (ret == -1) {
 375                                         RTE_LOG(INFO, VHOST_CONFIG,
 376                                                 "Invalid argument for rx-retry-num [0-N]\n");
 377                                         tep_termination_usage(prgname);
 378                                         return -1;
 379                                 } else
 380                                         burst_rx_retry_num = ret;
 381                         }
 382
 383                         if (!strncmp(long_option[option_index].name,
 384                                 CMD_LINE_OPT_TX_CHECKSUM,
 385                                 sizeof(CMD_LINE_OPT_TX_CHECKSUM))) {
 386                                 ret = parse_num_opt(optarg, 1);
 387                                 if (ret == -1) {
 388                                         RTE_LOG(INFO, VHOST_CONFIG,
 389                                                 "Invalid argument for tx-checksum [0|1]\n");
 390                                         tep_termination_usage(prgname);
 391                                         return -1;
 392                                 } else
 393                                         tx_checksum = ret;
 394                         }
 395
 396                         if (!strncmp(long_option[option_index].name,
 397                                         CMD_LINE_OPT_FILTER_TYPE,
 398                                         sizeof(CMD_LINE_OPT_FILTER_TYPE))) {
 399                                 ret = parse_num_opt(optarg, 3);
 400                                 if ((ret == -1) || (ret == 0)) {
 401                                         RTE_LOG(INFO, VHOST_CONFIG,
 402                                                 "Invalid argument for filter type [1-3]\n");
 403                                         tep_termination_usage(prgname);
 404                                         return -1;
 405                                 } else
 406                                         filter_idx = ret - 1;
 407                         }
 408
 409                         /* Enable/disable encapsulation on RX. */
 410                         if (!strncmp(long_option[option_index].name,
 411                                 CMD_LINE_OPT_DECAP,
 412                                 sizeof(CMD_LINE_OPT_DECAP))) {
 413                                 ret = parse_num_opt(optarg, 1);
 414                                 if (ret == -1) {
 415                                         RTE_LOG(INFO, VHOST_CONFIG,
 416                                                 "Invalid argument for decap [0|1]\n");
 417                                         tep_termination_usage(prgname);
 418                                         return -1;
 419                                 } else
 420                                         rx_decap = ret;
 421                         }
 422
 423                         /* Enable/disable encapsulation on TX. */
 424                         if (!strncmp(long_option[option_index].name,
 425                                 CMD_LINE_OPT_ENCAP,
 426                                 sizeof(CMD_LINE_OPT_ENCAP))) {
 427                                 ret = parse_num_opt(optarg, 1);
 428                                 if (ret == -1) {
 429                                         RTE_LOG(INFO, VHOST_CONFIG,
 430                                                 "Invalid argument for encap [0|1]\n");
 431                                         tep_termination_usage(prgname);
 432                                         return -1;
 433                                 } else
 434                                         tx_encap = ret;
 435                         }
 436
 437                         /* Enable/disable stats. */
 438                         if (!strncmp(long_option[option_index].name,
 439                                 CMD_LINE_OPT_STATS,
 440                                 sizeof(CMD_LINE_OPT_STATS))) {
 441                                 ret = parse_num_opt(optarg, INT32_MAX);
 442                                 if (ret == -1) {
 443                                         RTE_LOG(INFO, VHOST_CONFIG,
 444                                                         "Invalid argument for stats [0..N]\n");
 445                                         tep_termination_usage(prgname);
 446                                         return -1;
 447                                 } else
 448                                         enable_stats = ret;
 449                         }
 450
 451                         /* Set character device basename. */
 452                         if (!strncmp(long_option[option_index].name,
 453                                 CMD_LINE_OPT_DEV_BASENAME,
 454                                 sizeof(CMD_LINE_OPT_DEV_BASENAME))) {
 455                                 if (us_vhost_parse_basename(optarg) == -1) {
 456                                         RTE_LOG(INFO, VHOST_CONFIG,
 457                                                 "Invalid argument for character "
 458                                                 "device basename (Max %d characters)\n",
 459                                                 MAX_BASENAME_SZ);
 460                                         tep_termination_usage(prgname);
 461                                         return -1;
 462                                 }
 463                         }
 464
 465                         break;
 466
 467                         /* Invalid option - print options. */
 468                 default:
 469                         tep_termination_usage(prgname);
 470                         return -1;
 471                 }
 472         }
 473
 474         for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
 475                 if (enabled_port_mask & (1 << i))
 476                         ports[nb_ports++] = (uint8_t)i;
 477         }
 478
 479         if ((nb_ports ==  0) || (nb_ports > MAX_SUP_PORTS)) {
 480                 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
 481                         "but only %u port can be enabled\n", nb_ports,
 482                         MAX_SUP_PORTS);
 483                 return -1;
 484         }
 485
 486         return 0;
 487 }
 488
 489 /**
 490  * Update the global var NB_PORTS and array PORTS
 491  * according to system ports number and return valid ports number
 492  */
 493 static unsigned
 494 check_ports_num(unsigned max_nb_ports)
 495 {
 496         unsigned valid_nb_ports = nb_ports;
 497         unsigned portid;
 498
 499         if (nb_ports > max_nb_ports) {
 500                 RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) "
 501                         " exceeds total system port number(%u)\n",
 502                         nb_ports, max_nb_ports);
 503                 nb_ports = max_nb_ports;
 504         }
 505
 506         for (portid = 0; portid < nb_ports; portid++) {
 507                 if (!rte_eth_dev_is_valid_port(ports[portid])) {
 508                         RTE_LOG(INFO, VHOST_PORT,
 509                                 "\nSpecified port ID(%u) is not valid\n",
 510                                 ports[portid]);
 511                         ports[portid] = INVALID_PORT_ID;
 512                         valid_nb_ports--;
 513                 }
 514         }
 515         return valid_nb_ports;
 516 }
 517
 518 /**
 519  * This function routes the TX packet to the correct interface. This may be a local device
 520  * or the physical port.
 521  */
 522 static __rte_always_inline void
 523 virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m)
 524 {
 525         struct mbuf_table *tx_q;
 526         struct rte_mbuf **m_table;
 527         unsigned len, ret = 0;
 528         const uint16_t lcore_id = rte_lcore_id();
 529
 530         RTE_LOG_DP(DEBUG, VHOST_DATA, "(%d) TX: MAC address is external\n",
 531                 vdev->vid);
 532
 533         /* Add packet to the port tx queue */
 534         tx_q = &lcore_tx_queue[lcore_id];
 535         len = tx_q->len;
 536
 537         tx_q->m_table[len] = m;
 538         len++;
 539         if (enable_stats) {
 540                 dev_statistics[vdev->vid].tx_total++;
 541                 dev_statistics[vdev->vid].tx++;
 542         }
 543
 544         if (unlikely(len == MAX_PKT_BURST)) {
 545                 m_table = (struct rte_mbuf **)tx_q->m_table;
 546                 ret = overlay_options.tx_handle(ports[0],
 547                         (uint16_t)tx_q->txq_id, m_table,
 548                         (uint16_t)tx_q->len);
 549
 550                 /* Free any buffers not handled by TX and update
 551                  * the port stats.
 552                  */
 553                 if (unlikely(ret < len)) {
 554                         do {
 555                                 rte_pktmbuf_free(m_table[ret]);
 556                         } while (++ret < len);
 557                 }
 558
 559                 len = 0;
 560         }
 561
 562         tx_q->len = len;
 563         return;
 564 }
 565
 566 /**
 567  * This function is called by each data core. It handles all
 568  * RX/TX registered with the core. For TX the specific lcore
 569  * linked list is used. For RX, MAC addresses are compared
 570  * with all devices in the main linked list.
 571  */
 572 static int
 573 switch_worker(__rte_unused void *arg)
 574 {
 575         struct rte_mempool *mbuf_pool = arg;
 576         struct vhost_dev *vdev = NULL;
 577         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 578         struct virtio_net_data_ll *dev_ll;
 579         struct mbuf_table *tx_q;
 580         volatile struct lcore_ll_info *lcore_ll;
 581         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
 582                                         / US_PER_S * BURST_TX_DRAIN_US;
 583         uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
 584         unsigned i, ret = 0;
 585         const uint16_t lcore_id = rte_lcore_id();
 586         const uint16_t num_cores = (uint16_t)rte_lcore_count();
 587         uint16_t rx_count = 0;
 588         uint16_t tx_count;
 589         uint32_t retry = 0;
 590
 591         RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
 592         lcore_ll = lcore_info[lcore_id].lcore_ll;
 593         prev_tsc = 0;
 594
 595         tx_q = &lcore_tx_queue[lcore_id];
 596         for (i = 0; i < num_cores; i++) {
 597                 if (lcore_ids[i] == lcore_id) {
 598                         tx_q->txq_id = i;
 599                         break;
 600                 }
 601         }
 602
 603         while (1) {
 604                 cur_tsc = rte_rdtsc();
 605                 /*
 606                  * TX burst queue drain
 607                  */
 608                 diff_tsc = cur_tsc - prev_tsc;
 609                 if (unlikely(diff_tsc > drain_tsc)) {
 610
 611                         if (tx_q->len) {
 612                                 RTE_LOG_DP(DEBUG, VHOST_DATA, "TX queue drained after "
 613                                         "timeout with burst size %u\n",
 614                                         tx_q->len);
 615                                 ret = overlay_options.tx_handle(ports[0],
 616                                         (uint16_t)tx_q->txq_id,
 617                                         (struct rte_mbuf **)tx_q->m_table,
 618                                         (uint16_t)tx_q->len);
 619                                 if (unlikely(ret < tx_q->len)) {
 620                                         do {
 621                                                 rte_pktmbuf_free(tx_q->m_table[ret]);
 622                                         } while (++ret < tx_q->len);
 623                                 }
 624
 625                                 tx_q->len = 0;
 626                         }
 627
 628                         prev_tsc = cur_tsc;
 629
 630                 }
 631
 632                 rte_prefetch0(lcore_ll->ll_root_used);
 633
 634                 /**
 635                  * Inform the configuration core that we have exited
 636                  * the linked list and that no devices are
 637                  * in use if requested.
 638                  */
 639                 if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
 640                         lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
 641
 642                 /*
 643                  * Process devices
 644                  */
 645                 dev_ll = lcore_ll->ll_root_used;
 646
 647                 while (dev_ll != NULL) {
 648                         vdev = dev_ll->vdev;
 649
 650                         if (unlikely(vdev->remove)) {
 651                                 dev_ll = dev_ll->next;
 652                                 overlay_options.tunnel_destroy(vdev);
 653                                 vdev->ready = DEVICE_SAFE_REMOVE;
 654                                 continue;
 655                         }
 656                         if (likely(vdev->ready == DEVICE_RX)) {
 657                                 /* Handle guest RX */
 658                                 rx_count = rte_eth_rx_burst(ports[0],
 659                                         vdev->rx_q, pkts_burst, MAX_PKT_BURST);
 660
 661                                 if (rx_count) {
 662                                         /*
 663                                         * Retry is enabled and the queue is
 664                                         * full then we wait and retry to
 665                                         * avoid packet loss. Here MAX_PKT_BURST
 666                                         * must be less than virtio queue size
 667                                         */
 668                                         if (enable_retry && unlikely(rx_count >
 669                                                 rte_vhost_avail_entries(vdev->vid, VIRTIO_RXQ))) {
 670                                                 for (retry = 0; retry < burst_rx_retry_num;
 671                                                         retry++) {
 672                                                         rte_delay_us(burst_rx_delay_time);
 673                                                         if (rx_count <= rte_vhost_avail_entries(vdev->vid, VIRTIO_RXQ))
 674                                                                 break;
 675                                                 }
 676                                         }
 677
 678                                         ret_count = overlay_options.rx_handle(vdev->vid, pkts_burst, rx_count);
 679                                         if (enable_stats) {
 680                                                 rte_atomic64_add(
 681                                                 &dev_statistics[vdev->vid].rx_total_atomic,
 682                                                 rx_count);
 683                                                 rte_atomic64_add(
 684                                                 &dev_statistics[vdev->vid].rx_atomic, ret_count);
 685                                         }
 686                                         while (likely(rx_count)) {
 687                                                 rx_count--;
 688                                                 rte_pktmbuf_free(pkts_burst[rx_count]);
 689                                         }
 690
 691                                 }
 692                         }
 693
 694                         if (likely(!vdev->remove)) {
 695                                 /* Handle guest TX*/
 696                                 tx_count = rte_vhost_dequeue_burst(vdev->vid,
 697                                                 VIRTIO_TXQ, mbuf_pool,
 698                                                 pkts_burst, MAX_PKT_BURST);
 699                                 /* If this is the first received packet we need to learn the MAC */
 700                                 if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) {
 701                                         if (vdev->remove ||
 702                                                 (overlay_options.tunnel_setup(vdev, pkts_burst[0]) == -1)) {
 703                                                 while (tx_count)
 704                                                         rte_pktmbuf_free(pkts_burst[--tx_count]);
 705                                         }
 706                                 }
 707                                 while (tx_count)
 708                                         virtio_tx_route(vdev, pkts_burst[--tx_count]);
 709                         }
 710
 711                         /* move to the next device in the list */
 712                         dev_ll = dev_ll->next;
 713                 }
 714         }
 715
 716         return 0;
 717 }
 718
 719 /**
 720  * Add an entry to a used linked list. A free entry must first be found
 721  * in the free linked list using get_data_ll_free_entry();
 722  */
 723 static void
 724 add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
 725         struct virtio_net_data_ll *ll_dev)
 726 {
 727         struct virtio_net_data_ll *ll = *ll_root_addr;
 728
 729         /* Set next as NULL and use a compiler barrier to avoid reordering. */
 730         ll_dev->next = NULL;
 731         rte_compiler_barrier();
 732
 733         /* If ll == NULL then this is the first device. */
 734         if (ll) {
 735                 /* Increment to the tail of the linked list. */
 736                 while (ll->next != NULL)
 737                         ll = ll->next;
 738
 739                 ll->next = ll_dev;
 740         } else {
 741                 *ll_root_addr = ll_dev;
 742         }
 743 }
 744
 745 /**
 746  * Remove an entry from a used linked list. The entry must then be added to
 747  * the free linked list using put_data_ll_free_entry().
 748  */
 749 static void
 750 rm_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
 751         struct virtio_net_data_ll *ll_dev,
 752         struct virtio_net_data_ll *ll_dev_last)
 753 {
 754         struct virtio_net_data_ll *ll = *ll_root_addr;
 755
 756         if (unlikely((ll == NULL) || (ll_dev == NULL)))
 757                 return;
 758
 759         if (ll_dev == ll)
 760                 *ll_root_addr = ll_dev->next;
 761         else
 762                 if (likely(ll_dev_last != NULL))
 763                         ll_dev_last->next = ll_dev->next;
 764                 else
 765                         RTE_LOG(ERR, VHOST_CONFIG,
 766                                 "Remove entry form ll failed.\n");
 767 }
 768
 769 /**
 770  * Find and return an entry from the free linked list.
 771  */
 772 static struct virtio_net_data_ll *
 773 get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
 774 {
 775         struct virtio_net_data_ll *ll_free = *ll_root_addr;
 776         struct virtio_net_data_ll *ll_dev;
 777
 778         if (ll_free == NULL)
 779                 return NULL;
 780
 781         ll_dev = ll_free;
 782         *ll_root_addr = ll_free->next;
 783
 784         return ll_dev;
 785 }
 786
 787 /**
 788  * Place an entry back on to the free linked list.
 789  */
 790 static void
 791 put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr,
 792         struct virtio_net_data_ll *ll_dev)
 793 {
 794         struct virtio_net_data_ll *ll_free = *ll_root_addr;
 795
 796         if (ll_dev == NULL)
 797                 return;
 798
 799         ll_dev->next = ll_free;
 800         *ll_root_addr = ll_dev;
 801 }
 802
 803 /**
 804  * Creates a linked list of a given size.
 805  */
 806 static struct virtio_net_data_ll *
 807 alloc_data_ll(uint32_t size)
 808 {
 809         struct virtio_net_data_ll *ll_new;
 810         uint32_t i;
 811
 812         /* Malloc and then chain the linked list. */
 813         ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
 814         if (ll_new == NULL) {
 815                 RTE_LOG(ERR, VHOST_CONFIG,
 816                         "Failed to allocate memory for ll_new.\n");
 817                 return NULL;
 818         }
 819
 820         for (i = 0; i < size - 1; i++) {
 821                 ll_new[i].vdev = NULL;
 822                 ll_new[i].next = &ll_new[i+1];
 823         }
 824         ll_new[i].next = NULL;
 825
 826         return ll_new;
 827 }
 828
 829 /**
 830  * Create the main linked list along with each individual cores
 831  * linked list. A used and a free list are created to manage entries.
 832  */
 833 static int
 834 init_data_ll(void)
 835 {
 836         int lcore;
 837
 838         RTE_LCORE_FOREACH_SLAVE(lcore) {
 839                 lcore_info[lcore].lcore_ll =
 840                         malloc(sizeof(struct lcore_ll_info));
 841                 if (lcore_info[lcore].lcore_ll == NULL) {
 842                         RTE_LOG(ERR, VHOST_CONFIG,
 843                                 "Failed to allocate memory for lcore_ll.\n");
 844                         return -1;
 845                 }
 846
 847                 lcore_info[lcore].lcore_ll->device_num = 0;
 848                 lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
 849                 lcore_info[lcore].lcore_ll->ll_root_used = NULL;
 850                 if (nb_devices % nb_switching_cores)
 851                         lcore_info[lcore].lcore_ll->ll_root_free =
 852                                 alloc_data_ll((nb_devices / nb_switching_cores)
 853                                                 + 1);
 854                 else
 855                         lcore_info[lcore].lcore_ll->ll_root_free =
 856                                 alloc_data_ll(nb_devices / nb_switching_cores);
 857         }
 858
 859         /* Allocate devices up to a maximum of MAX_DEVICES. */
 860         ll_root_free = alloc_data_ll(MIN((nb_devices), MAX_DEVICES));
 861
 862         return 0;
 863 }
 864
 865 /**
 866  * Remove a device from the specific data core linked list and
 867  * from the main linked list. Synchonization occurs through the use
 868  * of the lcore dev_removal_flag.
 869  */
 870 static void
 871 destroy_device(int vid)
 872 {
 873         struct virtio_net_data_ll *ll_lcore_dev_cur;
 874         struct virtio_net_data_ll *ll_main_dev_cur;
 875         struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
 876         struct virtio_net_data_ll *ll_main_dev_last = NULL;
 877         struct vhost_dev *vdev = NULL;
 878         int lcore;
 879
 880         ll_main_dev_cur = ll_root_used;
 881         while (ll_main_dev_cur != NULL) {
 882                 if (ll_main_dev_cur->vdev->vid == vid) {
 883                         vdev = ll_main_dev_cur->vdev;
 884                         break;
 885                 }
 886         }
 887         if (!vdev)
 888                 return;
 889
 890         /* set the remove flag. */
 891         vdev->remove = 1;
 892         while (vdev->ready != DEVICE_SAFE_REMOVE)
 893                 rte_pause();
 894
 895         /* Search for entry to be removed from lcore ll */
 896         ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
 897         while (ll_lcore_dev_cur != NULL) {
 898                 if (ll_lcore_dev_cur->vdev == vdev) {
 899                         break;
 900                 } else {
 901                         ll_lcore_dev_last = ll_lcore_dev_cur;
 902                         ll_lcore_dev_cur = ll_lcore_dev_cur->next;
 903                 }
 904         }
 905
 906         if (ll_lcore_dev_cur == NULL) {
 907                 RTE_LOG(ERR, VHOST_CONFIG,
 908                         "(%d) Failed to find the dev to be destroy.\n", vid);
 909                 return;
 910         }
 911
 912         /* Search for entry to be removed from main ll */
 913         ll_main_dev_cur = ll_root_used;
 914         ll_main_dev_last = NULL;
 915         while (ll_main_dev_cur != NULL) {
 916                 if (ll_main_dev_cur->vdev == vdev) {
 917                         break;
 918                 } else {
 919                         ll_main_dev_last = ll_main_dev_cur;
 920                         ll_main_dev_cur = ll_main_dev_cur->next;
 921                 }
 922         }
 923
 924         /* Remove entries from the lcore and main ll. */
 925         rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
 926                         ll_lcore_dev_cur, ll_lcore_dev_last);
 927         rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
 928
 929         /* Set the dev_removal_flag on each lcore. */
 930         RTE_LCORE_FOREACH_SLAVE(lcore) {
 931                 lcore_info[lcore].lcore_ll->dev_removal_flag =
 932                         REQUEST_DEV_REMOVAL;
 933         }
 934
 935         /*
 936          * Once each core has set the dev_removal_flag to
 937          * ACK_DEV_REMOVAL we can be sure that they can no longer access
 938          * the device removed from the linked lists and that the devices
 939          * are no longer in use.
 940          */
 941         RTE_LCORE_FOREACH_SLAVE(lcore) {
 942                 while (lcore_info[lcore].lcore_ll->dev_removal_flag
 943                         != ACK_DEV_REMOVAL)
 944                         rte_pause();
 945         }
 946
 947         /* Add the entries back to the lcore and main free ll.*/
 948         put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
 949                                 ll_lcore_dev_cur);
 950         put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
 951
 952         /* Decrement number of device on the lcore. */
 953         lcore_info[vdev->coreid].lcore_ll->device_num--;
 954
 955         RTE_LOG(INFO, VHOST_DATA, "(%d) Device has been removed "
 956                 "from data core\n", vid);
 957
 958         rte_free(vdev);
 959
 960 }
 961
 962 /**
 963  * A new device is added to a data core. First the device is added
 964  * to the main linked list and the allocated to a specific data core.
 965  */
 966 static int
 967 new_device(int vid)
 968 {
 969         struct virtio_net_data_ll *ll_dev;
 970         int lcore, core_add = 0;
 971         uint32_t device_num_min = nb_devices;
 972         struct vhost_dev *vdev;
 973
 974         vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
 975         if (vdev == NULL) {
 976                 RTE_LOG(INFO, VHOST_DATA,
 977                         "(%d) Couldn't allocate memory for vhost dev\n", vid);
 978                 return -1;
 979         }
 980         vdev->vid = vid;
 981         /* Add device to main ll */
 982         ll_dev = get_data_ll_free_entry(&ll_root_free);
 983         if (ll_dev == NULL) {
 984                 RTE_LOG(INFO, VHOST_DATA, "(%d) No free entry found in"
 985                         " linked list Device limit of %d devices per core"
 986                         " has been reached\n", vid, nb_devices);
 987                 if (vdev->regions_hpa)
 988                         rte_free(vdev->regions_hpa);
 989                 rte_free(vdev);
 990                 return -1;
 991         }
 992         ll_dev->vdev = vdev;
 993         add_data_ll_entry(&ll_root_used, ll_dev);
 994         vdev->rx_q = vid;
 995
 996         /* reset ready flag */
 997         vdev->ready = DEVICE_MAC_LEARNING;
 998         vdev->remove = 0;
 999
1000         /* Find a suitable lcore to add the device. */
1001         RTE_LCORE_FOREACH_SLAVE(lcore) {
1002                 if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
1003                         device_num_min = lcore_info[lcore].lcore_ll->device_num;
1004                         core_add = lcore;
1005                 }
1006         }
1007         /* Add device to lcore ll */
1008         ll_dev = get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
1009         if (ll_dev == NULL) {
1010                 RTE_LOG(INFO, VHOST_DATA,
1011                         "(%d) Failed to add device to data core\n",
1012                         vid);
1013                 vdev->ready = DEVICE_SAFE_REMOVE;
1014                 destroy_device(vid);
1015                 rte_free(vdev->regions_hpa);
1016                 rte_free(vdev);
1017                 return -1;
1018         }
1019         ll_dev->vdev = vdev;
1020         vdev->coreid = core_add;
1021
1022         add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
1023                         ll_dev);
1024
1025         /* Initialize device stats */
1026         memset(&dev_statistics[vid], 0,
1027                 sizeof(struct device_statistics));
1028
1029         /* Disable notifications. */
1030         rte_vhost_enable_guest_notification(vid, VIRTIO_RXQ, 0);
1031         rte_vhost_enable_guest_notification(vid, VIRTIO_TXQ, 0);
1032         lcore_info[vdev->coreid].lcore_ll->device_num++;
1033
1034         RTE_LOG(INFO, VHOST_DATA, "(%d) Device has been added to data core %d\n",
1035                 vid, vdev->coreid);
1036
1037         return 0;
1038 }
1039
1040 /**
1041  * These callback allow devices to be added to the data core when configuration
1042  * has been fully complete.
1043  */
1044 static const struct vhost_device_ops virtio_net_device_ops = {
1045         .new_device =  new_device,
1046         .destroy_device = destroy_device,
1047 };
1048
1049 /**
1050  * This is a thread will wake up after a period to print stats if the user has
1051  * enabled them.
1052  */
1053 static void *
1054 print_stats(__rte_unused void *arg)
1055 {
1056         struct virtio_net_data_ll *dev_ll;
1057         uint64_t tx_dropped, rx_dropped;
1058         uint64_t tx, tx_total, rx, rx_total, rx_ip_csum, rx_l4_csum;
1059         int vid;
1060         const char clr[] = { 27, '[', '2', 'J', '\0' };
1061         const char top_left[] = { 27, '[', '1', ';', '1', 'H', '\0' };
1062
1063         while (1) {
1064                 sleep(enable_stats);
1065
1066                 /* Clear screen and move to top left */
1067                 printf("%s%s", clr, top_left);
1068
1069                 printf("\nDevice statistics ================================");
1070
1071                 dev_ll = ll_root_used;
1072                 while (dev_ll != NULL) {
1073                         vid = dev_ll->vdev->vid;
1074                         tx_total = dev_statistics[vid].tx_total;
1075                         tx = dev_statistics[vid].tx;
1076                         tx_dropped = tx_total - tx;
1077
1078                         rx_total = rte_atomic64_read(
1079                                 &dev_statistics[vid].rx_total_atomic);
1080                         rx = rte_atomic64_read(
1081                                 &dev_statistics[vid].rx_atomic);
1082                         rx_dropped = rx_total - rx;
1083                         rx_ip_csum = rte_atomic64_read(
1084                                 &dev_statistics[vid].rx_bad_ip_csum);
1085                         rx_l4_csum = rte_atomic64_read(
1086                                 &dev_statistics[vid].rx_bad_l4_csum);
1087
1088                         printf("\nStatistics for device %d ----------"
1089                                         "\nTX total:            %"PRIu64""
1090                                         "\nTX dropped:          %"PRIu64""
1091                                         "\nTX successful:               %"PRIu64""
1092                                         "\nRX total:            %"PRIu64""
1093                                         "\nRX bad IP csum:      %"PRIu64""
1094                                         "\nRX bad L4 csum:      %"PRIu64""
1095                                         "\nRX dropped:          %"PRIu64""
1096                                         "\nRX successful:               %"PRIu64"",
1097                                         vid,
1098                                         tx_total,
1099                                         tx_dropped,
1100                                         tx,
1101                                         rx_total,
1102                                         rx_ip_csum,
1103                                         rx_l4_csum,
1104                                         rx_dropped,
1105                                         rx);
1106
1107                         dev_ll = dev_ll->next;
1108                 }
1109                 printf("\n================================================\n");
1110
1111                 fflush(stdout);
1112         }
1113
1114         return NULL;
1115 }
1116
1117 /**
1118  * Main function, does initialisation and calls the per-lcore functions.
1119  */
1120 int
1121 main(int argc, char *argv[])
1122 {
1123         struct rte_mempool *mbuf_pool = NULL;
1124         unsigned lcore_id, core_id = 0;
1125         unsigned nb_ports, valid_nb_ports;
1126         int ret;
1127         uint16_t portid;
1128         uint16_t queue_id;
1129         static pthread_t tid;
1130
1131         /* init EAL */
1132         ret = rte_eal_init(argc, argv);
1133         if (ret < 0)
1134                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
1135         argc -= ret;
1136         argv += ret;
1137
1138         /* parse app arguments */
1139         ret = tep_termination_parse_args(argc, argv);
1140         if (ret < 0)
1141                 rte_exit(EXIT_FAILURE, "Invalid argument\n");
1142
1143         for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
1144                 if (rte_lcore_is_enabled(lcore_id))
1145                         lcore_ids[core_id++] = lcore_id;
1146
1147         /* set the number of swithcing cores available */
1148         nb_switching_cores = rte_lcore_count()-1;
1149
1150         /* Get the number of physical ports. */
1151         nb_ports = rte_eth_dev_count_avail();
1152
1153         /*
1154          * Update the global var NB_PORTS and global array PORTS
1155          * and get value of var VALID_NB_PORTS according to system ports number
1156          */
1157         valid_nb_ports = check_ports_num(nb_ports);
1158
1159         if ((valid_nb_ports == 0) || (valid_nb_ports > MAX_SUP_PORTS)) {
1160                 rte_exit(EXIT_FAILURE, "Current enabled port number is %u,"
1161                         "but only %u port can be enabled\n", nb_ports,
1162                         MAX_SUP_PORTS);
1163         }
1164         /* Create the mbuf pool. */
1165         mbuf_pool = rte_pktmbuf_pool_create(
1166                         "MBUF_POOL",
1167                         NUM_MBUFS_PER_PORT * valid_nb_ports,
1168                         MBUF_CACHE_SIZE,
1169                         0,
1170                         MBUF_DATA_SIZE,
1171                         rte_socket_id());
1172         if (mbuf_pool == NULL)
1173                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
1174
1175         for (queue_id = 0; queue_id < MAX_QUEUES + 1; queue_id++)
1176                 vpool_array[queue_id].pool = mbuf_pool;
1177
1178         /* initialize all ports */
1179         RTE_ETH_FOREACH_DEV(portid) {
1180                 /* skip ports that are not enabled */
1181                 if ((enabled_port_mask & (1 << portid)) == 0) {
1182                         RTE_LOG(INFO, VHOST_PORT,
1183                                 "Skipping disabled port %d\n", portid);
1184                         continue;
1185                 }
1186                 if (overlay_options.port_configure(portid, mbuf_pool) != 0)
1187                         rte_exit(EXIT_FAILURE,
1188                                 "Cannot initialize network ports\n");
1189         }
1190
1191         /* Initialise all linked lists. */
1192         if (init_data_ll() == -1)
1193                 rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
1194
1195         /* Initialize device stats */
1196         memset(&dev_statistics, 0, sizeof(dev_statistics));
1197
1198         /* Enable stats if the user option is set. */
1199         if (enable_stats) {
1200                 ret = rte_ctrl_thread_create(&tid, "print-stats", NULL,
1201                                         print_stats, NULL);
1202                 if (ret < 0)
1203                         rte_exit(EXIT_FAILURE, "Cannot create print-stats thread\n");
1204         }
1205
1206         /* Launch all data cores. */
1207         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
1208                 rte_eal_remote_launch(switch_worker,
1209                         mbuf_pool, lcore_id);
1210         }
1211
1212         ret = rte_vhost_driver_register((char *)&dev_basename, 0);
1213         if (ret != 0)
1214                 rte_exit(EXIT_FAILURE, "failed to register vhost driver.\n");
1215
1216         rte_vhost_driver_disable_features(dev_basename,
1217                 1ULL << VIRTIO_NET_F_MRG_RXBUF);
1218
1219         ret = rte_vhost_driver_callback_register(dev_basename,
1220                 &virtio_net_device_ops);
1221         if (ret != 0) {
1222                 rte_exit(EXIT_FAILURE,
1223                         "failed to register vhost driver callbacks.\n");
1224         }
1225
1226         if (rte_vhost_driver_start(dev_basename) < 0) {
1227                 rte_exit(EXIT_FAILURE,
1228                         "failed to start vhost driver.\n");
1229         }
1230
1231         RTE_LCORE_FOREACH_SLAVE(lcore_id)
1232                 rte_eal_wait_lcore(lcore_id);
1233
1234         return 0;
1235 }