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 /* State of virtio device. */
  56 #define DEVICE_MAC_LEARNING 0
  57 #define DEVICE_RX           1
  58 #define DEVICE_SAFE_REMOVE  2
  59
  60 /* Config_core_flag status definitions. */
  61 #define REQUEST_DEV_REMOVAL 1
  62 #define ACK_DEV_REMOVAL     0
  63
  64 /* Configurable number of RX/TX ring descriptors */
  65 #define RTE_TEST_RX_DESC_DEFAULT 1024
  66 #define RTE_TEST_TX_DESC_DEFAULT 512
  67
  68 /* Get first 4 bytes in mbuf headroom. */
  69 #define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \
  70                 + sizeof(struct rte_mbuf)))
  71
  72 #define INVALID_PORT_ID 0xFFFF
  73
  74 /* Size of buffers used for snprintfs. */
  75 #define MAX_PRINT_BUFF 6072
  76
  77 /* Maximum character device basename size. */
  78 #define MAX_BASENAME_SZ 20
  79
  80 /* Maximum long option length for option parsing. */
  81 #define MAX_LONG_OPT_SZ 64
  82
  83 /* Used to compare MAC addresses. */
  84 #define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
  85
  86 #define CMD_LINE_OPT_NB_DEVICES "nb-devices"
  87 #define CMD_LINE_OPT_UDP_PORT "udp-port"
  88 #define CMD_LINE_OPT_TX_CHECKSUM "tx-checksum"
  89 #define CMD_LINE_OPT_TSO_SEGSZ "tso-segsz"
  90 #define CMD_LINE_OPT_FILTER_TYPE "filter-type"
  91 #define CMD_LINE_OPT_ENCAP "encap"
  92 #define CMD_LINE_OPT_DECAP "decap"
  93 #define CMD_LINE_OPT_RX_RETRY "rx-retry"
  94 #define CMD_LINE_OPT_RX_RETRY_DELAY "rx-retry-delay"
  95 #define CMD_LINE_OPT_RX_RETRY_NUM "rx-retry-num"
  96 #define CMD_LINE_OPT_STATS "stats"
  97 #define CMD_LINE_OPT_DEV_BASENAME "dev-basename"
  98
  99 /* mask of enabled ports */
 100 static uint32_t enabled_port_mask;
 101
 102 /*Number of switching cores enabled*/
 103 static uint32_t nb_switching_cores;
 104
 105 /* number of devices/queues to support*/
 106 uint16_t nb_devices = 2;
 107
 108 /* max ring descriptor, ixgbe, i40e, e1000 all are 4096. */
 109 #define MAX_RING_DESC 4096
 110
 111 struct vpool {
 112         struct rte_mempool *pool;
 113         struct rte_ring *ring;
 114         uint32_t buf_size;
 115 } vpool_array[MAX_QUEUES+MAX_QUEUES];
 116
 117 /* UDP tunneling port */
 118 uint16_t udp_port = 4789;
 119
 120 /* enable/disable inner TX checksum */
 121 uint8_t tx_checksum = 0;
 122
 123 /* TCP segment size */
 124 uint16_t tso_segsz = 0;
 125
 126 /* enable/disable decapsulation */
 127 uint8_t rx_decap = 1;
 128
 129 /* enable/disable encapsulation */
 130 uint8_t tx_encap = 1;
 131
 132 /* RX filter type for tunneling packet */
 133 uint8_t filter_idx = 1;
 134
 135 /* overlay packet operation */
 136 struct ol_switch_ops overlay_options = {
 137         .port_configure = vxlan_port_init,
 138         .tunnel_setup = vxlan_link,
 139         .tunnel_destroy = vxlan_unlink,
 140         .tx_handle = vxlan_tx_pkts,
 141         .rx_handle = vxlan_rx_pkts,
 142         .param_handle = NULL,
 143 };
 144
 145 /* Enable stats. */
 146 uint32_t enable_stats = 0;
 147 /* Enable retries on RX. */
 148 static uint32_t enable_retry = 1;
 149 /* Specify timeout (in useconds) between retries on RX. */
 150 static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
 151 /* Specify the number of retries on RX. */
 152 static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
 153
 154 /* Character device basename. Can be set by user. */
 155 static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
 156
 157 static unsigned lcore_ids[RTE_MAX_LCORE];
 158 uint16_t ports[RTE_MAX_ETHPORTS];
 159
 160 static unsigned nb_ports; /**< The number of ports specified in command line */
 161
 162 /* ethernet addresses of ports */
 163 struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
 164
 165 /* heads for the main used and free linked lists for the data path. */
 166 static struct virtio_net_data_ll *ll_root_used;
 167 static struct virtio_net_data_ll *ll_root_free;
 168
 169 /**
 170  * Array of data core structures containing information on
 171  * individual core linked lists.
 172  */
 173 static struct lcore_info lcore_info[RTE_MAX_LCORE];
 174
 175 /* Used for queueing bursts of TX packets. */
 176 struct mbuf_table {
 177         unsigned len;
 178         unsigned txq_id;
 179         struct rte_mbuf *m_table[MAX_PKT_BURST];
 180 };
 181
 182 /* TX queue for each data core. */
 183 struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
 184
 185 struct device_statistics dev_statistics[MAX_DEVICES];
 186
 187 /**
 188  * Set character device basename.
 189  */
 190 static int
 191 us_vhost_parse_basename(const char *q_arg)
 192 {
 193         /* parse number string */
 194         if (strlen(q_arg) >= MAX_BASENAME_SZ)
 195                 return -1;
 196         else
 197                 snprintf((char *)&dev_basename, MAX_BASENAME_SZ, "%s", q_arg);
 198
 199         return 0;
 200 }
 201
 202 /**
 203  * Parse the portmask provided at run time.
 204  */
 205 static int
 206 parse_portmask(const char *portmask)
 207 {
 208         char *end = NULL;
 209         unsigned long pm;
 210
 211         /* parse hexadecimal string */
 212         pm = strtoul(portmask, &end, 16);
 213         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 214                 return -1;
 215
 216         if (pm == 0)
 217                 return -1;
 218
 219         return pm;
 220 }
 221
 222 /**
 223  * Parse num options at run time.
 224  */
 225 static int
 226 parse_num_opt(const char *q_arg, uint32_t max_valid_value)
 227 {
 228         char *end = NULL;
 229         unsigned long num;
 230
 231         /* parse unsigned int string */
 232         num = strtoul(q_arg, &end, 10);
 233         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 234                 return -1;
 235
 236         if (num > max_valid_value)
 237                 return -1;
 238
 239         return num;
 240 }
 241
 242 /**
 243  * Display usage
 244  */
 245 static void
 246 tep_termination_usage(const char *prgname)
 247 {
 248         RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
 249         "               --udp-port: UDP destination port for VXLAN packet\n"
 250         "               --nb-devices[1-64]: The number of virtIO device\n"
 251         "               --tx-checksum [0|1]: inner Tx checksum offload\n"
 252         "               --tso-segsz [0-N]: TCP segment size\n"
 253         "               --decap [0|1]: tunneling packet decapsulation\n"
 254         "               --encap [0|1]: tunneling packet encapsulation\n"
 255         "               --filter-type[1-3]: filter type for tunneling packet\n"
 256         "                   1: Inner MAC and tenent ID\n"
 257         "                   2: Inner MAC and VLAN, and tenent ID\n"
 258         "                   3: Outer MAC, Inner MAC and tenent ID\n"
 259         "               -p PORTMASK: Set mask for ports to be used by application\n"
 260         "               --rx-retry [0|1]: disable/enable(default) retries on rx."
 261         "                Enable retry if destintation queue is full\n"
 262         "               --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX."
 263         "                This makes effect only if retries on rx enabled\n"
 264         "               --rx-retry-num [0-N]: the number of retries on rx."
 265         "                This makes effect only if retries on rx enabled\n"
 266         "               --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
 267         "               --dev-basename: The basename to be used for the character device.\n",
 268                prgname);
 269 }
 270
 271 /**
 272  * Parse the arguments given in the command line of the application.
 273  */
 274 static int
 275 tep_termination_parse_args(int argc, char **argv)
 276 {
 277         int opt, ret;
 278         int option_index;
 279         unsigned i;
 280         const char *prgname = argv[0];
 281         static struct option long_option[] = {
 282                 {CMD_LINE_OPT_NB_DEVICES, required_argument, NULL, 0},
 283                 {CMD_LINE_OPT_UDP_PORT, required_argument, NULL, 0},
 284                 {CMD_LINE_OPT_TX_CHECKSUM, required_argument, NULL, 0},
 285                 {CMD_LINE_OPT_TSO_SEGSZ, required_argument, NULL, 0},
 286                 {CMD_LINE_OPT_DECAP, required_argument, NULL, 0},
 287                 {CMD_LINE_OPT_ENCAP, required_argument, NULL, 0},
 288                 {CMD_LINE_OPT_FILTER_TYPE, required_argument, NULL, 0},
 289                 {CMD_LINE_OPT_RX_RETRY, required_argument, NULL, 0},
 290                 {CMD_LINE_OPT_RX_RETRY_DELAY, required_argument, NULL, 0},
 291                 {CMD_LINE_OPT_RX_RETRY_NUM, required_argument, NULL, 0},
 292                 {CMD_LINE_OPT_STATS, required_argument, NULL, 0},
 293                 {CMD_LINE_OPT_DEV_BASENAME, required_argument, NULL, 0},
 294                 {NULL, 0, 0, 0},
 295         };
 296
 297         /* Parse command line */
 298         while ((opt = getopt_long(argc, argv, "p:",
 299                         long_option, &option_index)) != EOF) {
 300                 switch (opt) {
 301                 /* Portmask */
 302                 case 'p':
 303                         enabled_port_mask = parse_portmask(optarg);
 304                         if (enabled_port_mask == 0) {
 305                                 RTE_LOG(INFO, VHOST_CONFIG,
 306                                         "Invalid portmask\n");
 307                                 tep_termination_usage(prgname);
 308                                 return -1;
 309                         }
 310                         break;
 311                 case 0:
 312                         if (!strncmp(long_option[option_index].name,
 313                                 CMD_LINE_OPT_NB_DEVICES,
 314                                 sizeof(CMD_LINE_OPT_NB_DEVICES))) {
 315                                 ret = parse_num_opt(optarg, MAX_DEVICES);
 316                                 if (ret == -1) {
 317                                         RTE_LOG(INFO, VHOST_CONFIG,
 318                                         "Invalid argument for nb-devices [0-%d]\n",
 319                                         MAX_DEVICES);
 320                                         tep_termination_usage(prgname);
 321                                         return -1;
 322                                 } else
 323                                         nb_devices = ret;
 324                         }
 325
 326                         /* Enable/disable retries on RX. */
 327                         if (!strncmp(long_option[option_index].name,
 328                                 CMD_LINE_OPT_RX_RETRY,
 329                                 sizeof(CMD_LINE_OPT_RX_RETRY))) {
 330                                 ret = parse_num_opt(optarg, 1);
 331                                 if (ret == -1) {
 332                                         RTE_LOG(INFO, VHOST_CONFIG,
 333                                                 "Invalid argument for rx-retry [0|1]\n");
 334                                         tep_termination_usage(prgname);
 335                                         return -1;
 336                                 } else
 337                                         enable_retry = ret;
 338                         }
 339
 340                         if (!strncmp(long_option[option_index].name,
 341                                 CMD_LINE_OPT_TSO_SEGSZ,
 342                                 sizeof(CMD_LINE_OPT_TSO_SEGSZ))) {
 343                                 ret = parse_num_opt(optarg, INT16_MAX);
 344                                 if (ret == -1) {
 345                                         RTE_LOG(INFO, VHOST_CONFIG,
 346                                                 "Invalid argument for TCP segment size [0-N]\n");
 347                                         tep_termination_usage(prgname);
 348                                         return -1;
 349                                 } else
 350                                         tso_segsz = ret;
 351                         }
 352
 353                         if (!strncmp(long_option[option_index].name,
 354                                         CMD_LINE_OPT_UDP_PORT,
 355                                         sizeof(CMD_LINE_OPT_UDP_PORT))) {
 356                                 ret = parse_num_opt(optarg, INT16_MAX);
 357                                 if (ret == -1) {
 358                                         RTE_LOG(INFO, VHOST_CONFIG,
 359                                                 "Invalid argument for UDP port [0-N]\n");
 360                                         tep_termination_usage(prgname);
 361                                         return -1;
 362                                 } else
 363                                         udp_port = ret;
 364                         }
 365
 366                         /* Specify the retries delay time (in useconds) on RX.*/
 367                         if (!strncmp(long_option[option_index].name,
 368                                 CMD_LINE_OPT_RX_RETRY_DELAY,
 369                                 sizeof(CMD_LINE_OPT_RX_RETRY_DELAY))) {
 370                                 ret = parse_num_opt(optarg, INT32_MAX);
 371                                 if (ret == -1) {
 372                                         RTE_LOG(INFO, VHOST_CONFIG,
 373                                                 "Invalid argument for rx-retry-delay [0-N]\n");
 374                                         tep_termination_usage(prgname);
 375                                         return -1;
 376                                 } else
 377                                         burst_rx_delay_time = ret;
 378                         }
 379
 380                         /* Specify the retries number on RX. */
 381                         if (!strncmp(long_option[option_index].name,
 382                                 CMD_LINE_OPT_RX_RETRY_NUM,
 383                                 sizeof(CMD_LINE_OPT_RX_RETRY_NUM))) {
 384                                 ret = parse_num_opt(optarg, INT32_MAX);
 385                                 if (ret == -1) {
 386                                         RTE_LOG(INFO, VHOST_CONFIG,
 387                                                 "Invalid argument for rx-retry-num [0-N]\n");
 388                                         tep_termination_usage(prgname);
 389                                         return -1;
 390                                 } else
 391                                         burst_rx_retry_num = ret;
 392                         }
 393
 394                         if (!strncmp(long_option[option_index].name,
 395                                 CMD_LINE_OPT_TX_CHECKSUM,
 396                                 sizeof(CMD_LINE_OPT_TX_CHECKSUM))) {
 397                                 ret = parse_num_opt(optarg, 1);
 398                                 if (ret == -1) {
 399                                         RTE_LOG(INFO, VHOST_CONFIG,
 400                                                 "Invalid argument for tx-checksum [0|1]\n");
 401                                         tep_termination_usage(prgname);
 402                                         return -1;
 403                                 } else
 404                                         tx_checksum = ret;
 405                         }
 406
 407                         if (!strncmp(long_option[option_index].name,
 408                                         CMD_LINE_OPT_FILTER_TYPE,
 409                                         sizeof(CMD_LINE_OPT_FILTER_TYPE))) {
 410                                 ret = parse_num_opt(optarg, 3);
 411                                 if ((ret == -1) || (ret == 0)) {
 412                                         RTE_LOG(INFO, VHOST_CONFIG,
 413                                                 "Invalid argument for filter type [1-3]\n");
 414                                         tep_termination_usage(prgname);
 415                                         return -1;
 416                                 } else
 417                                         filter_idx = ret - 1;
 418                         }
 419
 420                         /* Enable/disable encapsulation on RX. */
 421                         if (!strncmp(long_option[option_index].name,
 422                                 CMD_LINE_OPT_DECAP,
 423                                 sizeof(CMD_LINE_OPT_DECAP))) {
 424                                 ret = parse_num_opt(optarg, 1);
 425                                 if (ret == -1) {
 426                                         RTE_LOG(INFO, VHOST_CONFIG,
 427                                                 "Invalid argument for decap [0|1]\n");
 428                                         tep_termination_usage(prgname);
 429                                         return -1;
 430                                 } else
 431                                         rx_decap = ret;
 432                         }
 433
 434                         /* Enable/disable encapsulation on TX. */
 435                         if (!strncmp(long_option[option_index].name,
 436                                 CMD_LINE_OPT_ENCAP,
 437                                 sizeof(CMD_LINE_OPT_ENCAP))) {
 438                                 ret = parse_num_opt(optarg, 1);
 439                                 if (ret == -1) {
 440                                         RTE_LOG(INFO, VHOST_CONFIG,
 441                                                 "Invalid argument for encap [0|1]\n");
 442                                         tep_termination_usage(prgname);
 443                                         return -1;
 444                                 } else
 445                                         tx_encap = ret;
 446                         }
 447
 448                         /* Enable/disable stats. */
 449                         if (!strncmp(long_option[option_index].name,
 450                                 CMD_LINE_OPT_STATS,
 451                                 sizeof(CMD_LINE_OPT_STATS))) {
 452                                 ret = parse_num_opt(optarg, INT32_MAX);
 453                                 if (ret == -1) {
 454                                         RTE_LOG(INFO, VHOST_CONFIG,
 455                                                         "Invalid argument for stats [0..N]\n");
 456                                         tep_termination_usage(prgname);
 457                                         return -1;
 458                                 } else
 459                                         enable_stats = ret;
 460                         }
 461
 462                         /* Set character device basename. */
 463                         if (!strncmp(long_option[option_index].name,
 464                                 CMD_LINE_OPT_DEV_BASENAME,
 465                                 sizeof(CMD_LINE_OPT_DEV_BASENAME))) {
 466                                 if (us_vhost_parse_basename(optarg) == -1) {
 467                                         RTE_LOG(INFO, VHOST_CONFIG,
 468                                                 "Invalid argument for character "
 469                                                 "device basename (Max %d characters)\n",
 470                                                 MAX_BASENAME_SZ);
 471                                         tep_termination_usage(prgname);
 472                                         return -1;
 473                                 }
 474                         }
 475
 476                         break;
 477
 478                         /* Invalid option - print options. */
 479                 default:
 480                         tep_termination_usage(prgname);
 481                         return -1;
 482                 }
 483         }
 484
 485         for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
 486                 if (enabled_port_mask & (1 << i))
 487                         ports[nb_ports++] = (uint8_t)i;
 488         }
 489
 490         if ((nb_ports ==  0) || (nb_ports > MAX_SUP_PORTS)) {
 491                 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
 492                         "but only %u port can be enabled\n", nb_ports,
 493                         MAX_SUP_PORTS);
 494                 return -1;
 495         }
 496
 497         return 0;
 498 }
 499
 500 /**
 501  * Update the global var NB_PORTS and array PORTS
 502  * according to system ports number and return valid ports number
 503  */
 504 static unsigned
 505 check_ports_num(unsigned max_nb_ports)
 506 {
 507         unsigned valid_nb_ports = nb_ports;
 508         unsigned portid;
 509
 510         if (nb_ports > max_nb_ports) {
 511                 RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) "
 512                         " exceeds total system port number(%u)\n",
 513                         nb_ports, max_nb_ports);
 514                 nb_ports = max_nb_ports;
 515         }
 516
 517         for (portid = 0; portid < nb_ports; portid++) {
 518                 if (!rte_eth_dev_is_valid_port(ports[portid])) {
 519                         RTE_LOG(INFO, VHOST_PORT,
 520                                 "\nSpecified port ID(%u) is not valid\n",
 521                                 ports[portid]);
 522                         ports[portid] = INVALID_PORT_ID;
 523                         valid_nb_ports--;
 524                 }
 525         }
 526         return valid_nb_ports;
 527 }
 528
 529 /**
 530  * This function routes the TX packet to the correct interface. This may be a local device
 531  * or the physical port.
 532  */
 533 static __rte_always_inline void
 534 virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m)
 535 {
 536         struct mbuf_table *tx_q;
 537         struct rte_mbuf **m_table;
 538         unsigned len, ret = 0;
 539         const uint16_t lcore_id = rte_lcore_id();
 540
 541         RTE_LOG_DP(DEBUG, VHOST_DATA, "(%d) TX: MAC address is external\n",
 542                 vdev->vid);
 543
 544         /* Add packet to the port tx queue */
 545         tx_q = &lcore_tx_queue[lcore_id];
 546         len = tx_q->len;
 547
 548         tx_q->m_table[len] = m;
 549         len++;
 550         if (enable_stats) {
 551                 dev_statistics[vdev->vid].tx_total++;
 552                 dev_statistics[vdev->vid].tx++;
 553         }
 554
 555         if (unlikely(len == MAX_PKT_BURST)) {
 556                 m_table = (struct rte_mbuf **)tx_q->m_table;
 557                 ret = overlay_options.tx_handle(ports[0],
 558                         (uint16_t)tx_q->txq_id, m_table,
 559                         (uint16_t)tx_q->len);
 560
 561                 /* Free any buffers not handled by TX and update
 562                  * the port stats.
 563                  */
 564                 if (unlikely(ret < len)) {
 565                         do {
 566                                 rte_pktmbuf_free(m_table[ret]);
 567                         } while (++ret < len);
 568                 }
 569
 570                 len = 0;
 571         }
 572
 573         tx_q->len = len;
 574         return;
 575 }
 576
 577 /**
 578  * This function is called by each data core. It handles all
 579  * RX/TX registered with the core. For TX the specific lcore
 580  * linked list is used. For RX, MAC addresses are compared
 581  * with all devices in the main linked list.
 582  */
 583 static int
 584 switch_worker(__rte_unused void *arg)
 585 {
 586         struct rte_mempool *mbuf_pool = arg;
 587         struct vhost_dev *vdev = NULL;
 588         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 589         struct virtio_net_data_ll *dev_ll;
 590         struct mbuf_table *tx_q;
 591         volatile struct lcore_ll_info *lcore_ll;
 592         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
 593                                         / US_PER_S * BURST_TX_DRAIN_US;
 594         uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
 595         unsigned i, ret = 0;
 596         const uint16_t lcore_id = rte_lcore_id();
 597         const uint16_t num_cores = (uint16_t)rte_lcore_count();
 598         uint16_t rx_count = 0;
 599         uint16_t tx_count;
 600         uint32_t retry = 0;
 601
 602         RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
 603         lcore_ll = lcore_info[lcore_id].lcore_ll;
 604         prev_tsc = 0;
 605
 606         tx_q = &lcore_tx_queue[lcore_id];
 607         for (i = 0; i < num_cores; i++) {
 608                 if (lcore_ids[i] == lcore_id) {
 609                         tx_q->txq_id = i;
 610                         break;
 611                 }
 612         }
 613
 614         while (1) {
 615                 cur_tsc = rte_rdtsc();
 616                 /*
 617                  * TX burst queue drain
 618                  */
 619                 diff_tsc = cur_tsc - prev_tsc;
 620                 if (unlikely(diff_tsc > drain_tsc)) {
 621
 622                         if (tx_q->len) {
 623                                 RTE_LOG_DP(DEBUG, VHOST_DATA, "TX queue drained after "
 624                                         "timeout with burst size %u\n",
 625                                         tx_q->len);
 626                                 ret = overlay_options.tx_handle(ports[0],
 627                                         (uint16_t)tx_q->txq_id,
 628                                         (struct rte_mbuf **)tx_q->m_table,
 629                                         (uint16_t)tx_q->len);
 630                                 if (unlikely(ret < tx_q->len)) {
 631                                         do {
 632                                                 rte_pktmbuf_free(tx_q->m_table[ret]);
 633                                         } while (++ret < tx_q->len);
 634                                 }
 635
 636                                 tx_q->len = 0;
 637                         }
 638
 639                         prev_tsc = cur_tsc;
 640
 641                 }
 642
 643                 rte_prefetch0(lcore_ll->ll_root_used);
 644
 645                 /**
 646                  * Inform the configuration core that we have exited
 647                  * the linked list and that no devices are
 648                  * in use if requested.
 649                  */
 650                 if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
 651                         lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
 652
 653                 /*
 654                  * Process devices
 655                  */
 656                 dev_ll = lcore_ll->ll_root_used;
 657
 658                 while (dev_ll != NULL) {
 659                         vdev = dev_ll->vdev;
 660
 661                         if (unlikely(vdev->remove)) {
 662                                 dev_ll = dev_ll->next;
 663                                 overlay_options.tunnel_destroy(vdev);
 664                                 vdev->ready = DEVICE_SAFE_REMOVE;
 665                                 continue;
 666                         }
 667                         if (likely(vdev->ready == DEVICE_RX)) {
 668                                 /* Handle guest RX */
 669                                 rx_count = rte_eth_rx_burst(ports[0],
 670                                         vdev->rx_q, pkts_burst, MAX_PKT_BURST);
 671
 672                                 if (rx_count) {
 673                                         /*
 674                                         * Retry is enabled and the queue is
 675                                         * full then we wait and retry to
 676                                         * avoid packet loss. Here MAX_PKT_BURST
 677                                         * must be less than virtio queue size
 678                                         */
 679                                         if (enable_retry && unlikely(rx_count >
 680                                                 rte_vhost_avail_entries(vdev->vid, VIRTIO_RXQ))) {
 681                                                 for (retry = 0; retry < burst_rx_retry_num;
 682                                                         retry++) {
 683                                                         rte_delay_us(burst_rx_delay_time);
 684                                                         if (rx_count <= rte_vhost_avail_entries(vdev->vid, VIRTIO_RXQ))
 685                                                                 break;
 686                                                 }
 687                                         }
 688
 689                                         ret_count = overlay_options.rx_handle(vdev->vid, pkts_burst, rx_count);
 690                                         if (enable_stats) {
 691                                                 rte_atomic64_add(
 692                                                 &dev_statistics[vdev->vid].rx_total_atomic,
 693                                                 rx_count);
 694                                                 rte_atomic64_add(
 695                                                 &dev_statistics[vdev->vid].rx_atomic, ret_count);
 696                                         }
 697                                         while (likely(rx_count)) {
 698                                                 rx_count--;
 699                                                 rte_pktmbuf_free(pkts_burst[rx_count]);
 700                                         }
 701
 702                                 }
 703                         }
 704
 705                         if (likely(!vdev->remove)) {
 706                                 /* Handle guest TX*/
 707                                 tx_count = rte_vhost_dequeue_burst(vdev->vid,
 708                                                 VIRTIO_TXQ, mbuf_pool,
 709                                                 pkts_burst, MAX_PKT_BURST);
 710                                 /* If this is the first received packet we need to learn the MAC */
 711                                 if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) {
 712                                         if (vdev->remove ||
 713                                                 (overlay_options.tunnel_setup(vdev, pkts_burst[0]) == -1)) {
 714                                                 while (tx_count)
 715                                                         rte_pktmbuf_free(pkts_burst[--tx_count]);
 716                                         }
 717                                 }
 718                                 while (tx_count)
 719                                         virtio_tx_route(vdev, pkts_burst[--tx_count]);
 720                         }
 721
 722                         /* move to the next device in the list */
 723                         dev_ll = dev_ll->next;
 724                 }
 725         }
 726
 727         return 0;
 728 }
 729
 730 /**
 731  * Add an entry to a used linked list. A free entry must first be found
 732  * in the free linked list using get_data_ll_free_entry();
 733  */
 734 static void
 735 add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
 736         struct virtio_net_data_ll *ll_dev)
 737 {
 738         struct virtio_net_data_ll *ll = *ll_root_addr;
 739
 740         /* Set next as NULL and use a compiler barrier to avoid reordering. */
 741         ll_dev->next = NULL;
 742         rte_compiler_barrier();
 743
 744         /* If ll == NULL then this is the first device. */
 745         if (ll) {
 746                 /* Increment to the tail of the linked list. */
 747                 while (ll->next != NULL)
 748                         ll = ll->next;
 749
 750                 ll->next = ll_dev;
 751         } else {
 752                 *ll_root_addr = ll_dev;
 753         }
 754 }
 755
 756 /**
 757  * Remove an entry from a used linked list. The entry must then be added to
 758  * the free linked list using put_data_ll_free_entry().
 759  */
 760 static void
 761 rm_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
 762         struct virtio_net_data_ll *ll_dev,
 763         struct virtio_net_data_ll *ll_dev_last)
 764 {
 765         struct virtio_net_data_ll *ll = *ll_root_addr;
 766
 767         if (unlikely((ll == NULL) || (ll_dev == NULL)))
 768                 return;
 769
 770         if (ll_dev == ll)
 771                 *ll_root_addr = ll_dev->next;
 772         else
 773                 if (likely(ll_dev_last != NULL))
 774                         ll_dev_last->next = ll_dev->next;
 775                 else
 776                         RTE_LOG(ERR, VHOST_CONFIG,
 777                                 "Remove entry form ll failed.\n");
 778 }
 779
 780 /**
 781  * Find and return an entry from the free linked list.
 782  */
 783 static struct virtio_net_data_ll *
 784 get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
 785 {
 786         struct virtio_net_data_ll *ll_free = *ll_root_addr;
 787         struct virtio_net_data_ll *ll_dev;
 788
 789         if (ll_free == NULL)
 790                 return NULL;
 791
 792         ll_dev = ll_free;
 793         *ll_root_addr = ll_free->next;
 794
 795         return ll_dev;
 796 }
 797
 798 /**
 799  * Place an entry back on to the free linked list.
 800  */
 801 static void
 802 put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr,
 803         struct virtio_net_data_ll *ll_dev)
 804 {
 805         struct virtio_net_data_ll *ll_free = *ll_root_addr;
 806
 807         if (ll_dev == NULL)
 808                 return;
 809
 810         ll_dev->next = ll_free;
 811         *ll_root_addr = ll_dev;
 812 }
 813
 814 /**
 815  * Creates a linked list of a given size.
 816  */
 817 static struct virtio_net_data_ll *
 818 alloc_data_ll(uint32_t size)
 819 {
 820         struct virtio_net_data_ll *ll_new;
 821         uint32_t i;
 822
 823         /* Malloc and then chain the linked list. */
 824         ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
 825         if (ll_new == NULL) {
 826                 RTE_LOG(ERR, VHOST_CONFIG,
 827                         "Failed to allocate memory for ll_new.\n");
 828                 return NULL;
 829         }
 830
 831         for (i = 0; i < size - 1; i++) {
 832                 ll_new[i].vdev = NULL;
 833                 ll_new[i].next = &ll_new[i+1];
 834         }
 835         ll_new[i].next = NULL;
 836
 837         return ll_new;
 838 }
 839
 840 /**
 841  * Create the main linked list along with each individual cores
 842  * linked list. A used and a free list are created to manage entries.
 843  */
 844 static int
 845 init_data_ll(void)
 846 {
 847         int lcore;
 848
 849         RTE_LCORE_FOREACH_SLAVE(lcore) {
 850                 lcore_info[lcore].lcore_ll =
 851                         malloc(sizeof(struct lcore_ll_info));
 852                 if (lcore_info[lcore].lcore_ll == NULL) {
 853                         RTE_LOG(ERR, VHOST_CONFIG,
 854                                 "Failed to allocate memory for lcore_ll.\n");
 855                         return -1;
 856                 }
 857
 858                 lcore_info[lcore].lcore_ll->device_num = 0;
 859                 lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
 860                 lcore_info[lcore].lcore_ll->ll_root_used = NULL;
 861                 if (nb_devices % nb_switching_cores)
 862                         lcore_info[lcore].lcore_ll->ll_root_free =
 863                                 alloc_data_ll((nb_devices / nb_switching_cores)
 864                                                 + 1);
 865                 else
 866                         lcore_info[lcore].lcore_ll->ll_root_free =
 867                                 alloc_data_ll(nb_devices / nb_switching_cores);
 868         }
 869
 870         /* Allocate devices up to a maximum of MAX_DEVICES. */
 871         ll_root_free = alloc_data_ll(MIN((nb_devices), MAX_DEVICES));
 872
 873         return 0;
 874 }
 875
 876 /**
 877  * Remove a device from the specific data core linked list and
 878  * from the main linked list. Synchonization occurs through the use
 879  * of the lcore dev_removal_flag.
 880  */
 881 static void
 882 destroy_device(int vid)
 883 {
 884         struct virtio_net_data_ll *ll_lcore_dev_cur;
 885         struct virtio_net_data_ll *ll_main_dev_cur;
 886         struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
 887         struct virtio_net_data_ll *ll_main_dev_last = NULL;
 888         struct vhost_dev *vdev = NULL;
 889         int lcore;
 890
 891         ll_main_dev_cur = ll_root_used;
 892         while (ll_main_dev_cur != NULL) {
 893                 if (ll_main_dev_cur->vdev->vid == vid) {
 894                         vdev = ll_main_dev_cur->vdev;
 895                         break;
 896                 }
 897         }
 898         if (!vdev)
 899                 return;
 900
 901         /* set the remove flag. */
 902         vdev->remove = 1;
 903         while (vdev->ready != DEVICE_SAFE_REMOVE)
 904                 rte_pause();
 905
 906         /* Search for entry to be removed from lcore ll */
 907         ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
 908         while (ll_lcore_dev_cur != NULL) {
 909                 if (ll_lcore_dev_cur->vdev == vdev) {
 910                         break;
 911                 } else {
 912                         ll_lcore_dev_last = ll_lcore_dev_cur;
 913                         ll_lcore_dev_cur = ll_lcore_dev_cur->next;
 914                 }
 915         }
 916
 917         if (ll_lcore_dev_cur == NULL) {
 918                 RTE_LOG(ERR, VHOST_CONFIG,
 919                         "(%d) Failed to find the dev to be destroy.\n", vid);
 920                 return;
 921         }
 922
 923         /* Search for entry to be removed from main ll */
 924         ll_main_dev_cur = ll_root_used;
 925         ll_main_dev_last = NULL;
 926         while (ll_main_dev_cur != NULL) {
 927                 if (ll_main_dev_cur->vdev == vdev) {
 928                         break;
 929                 } else {
 930                         ll_main_dev_last = ll_main_dev_cur;
 931                         ll_main_dev_cur = ll_main_dev_cur->next;
 932                 }
 933         }
 934
 935         /* Remove entries from the lcore and main ll. */
 936         rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
 937                         ll_lcore_dev_cur, ll_lcore_dev_last);
 938         rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
 939
 940         /* Set the dev_removal_flag on each lcore. */
 941         RTE_LCORE_FOREACH_SLAVE(lcore) {
 942                 lcore_info[lcore].lcore_ll->dev_removal_flag =
 943                         REQUEST_DEV_REMOVAL;
 944         }
 945
 946         /*
 947          * Once each core has set the dev_removal_flag to
 948          * ACK_DEV_REMOVAL we can be sure that they can no longer access
 949          * the device removed from the linked lists and that the devices
 950          * are no longer in use.
 951          */
 952         RTE_LCORE_FOREACH_SLAVE(lcore) {
 953                 while (lcore_info[lcore].lcore_ll->dev_removal_flag
 954                         != ACK_DEV_REMOVAL)
 955                         rte_pause();
 956         }
 957
 958         /* Add the entries back to the lcore and main free ll.*/
 959         put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
 960                                 ll_lcore_dev_cur);
 961         put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
 962
 963         /* Decrement number of device on the lcore. */
 964         lcore_info[vdev->coreid].lcore_ll->device_num--;
 965
 966         RTE_LOG(INFO, VHOST_DATA, "(%d) Device has been removed "
 967                 "from data core\n", vid);
 968
 969         rte_free(vdev);
 970
 971 }
 972
 973 /**
 974  * A new device is added to a data core. First the device is added
 975  * to the main linked list and the allocated to a specific data core.
 976  */
 977 static int
 978 new_device(int vid)
 979 {
 980         struct virtio_net_data_ll *ll_dev;
 981         int lcore, core_add = 0;
 982         uint32_t device_num_min = nb_devices;
 983         struct vhost_dev *vdev;
 984
 985         vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
 986         if (vdev == NULL) {
 987                 RTE_LOG(INFO, VHOST_DATA,
 988                         "(%d) Couldn't allocate memory for vhost dev\n", vid);
 989                 return -1;
 990         }
 991         vdev->vid = vid;
 992         /* Add device to main ll */
 993         ll_dev = get_data_ll_free_entry(&ll_root_free);
 994         if (ll_dev == NULL) {
 995                 RTE_LOG(INFO, VHOST_DATA, "(%d) No free entry found in"
 996                         " linked list Device limit of %d devices per core"
 997                         " has been reached\n", vid, nb_devices);
 998                 if (vdev->regions_hpa)
 999                         rte_free(vdev->regions_hpa);
1000                 rte_free(vdev);
1001                 return -1;
1002         }
1003         ll_dev->vdev = vdev;
1004         add_data_ll_entry(&ll_root_used, ll_dev);
1005         vdev->rx_q = vid;
1006
1007         /* reset ready flag */
1008         vdev->ready = DEVICE_MAC_LEARNING;
1009         vdev->remove = 0;
1010
1011         /* Find a suitable lcore to add the device. */
1012         RTE_LCORE_FOREACH_SLAVE(lcore) {
1013                 if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
1014                         device_num_min = lcore_info[lcore].lcore_ll->device_num;
1015                         core_add = lcore;
1016                 }
1017         }
1018         /* Add device to lcore ll */
1019         ll_dev = get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
1020         if (ll_dev == NULL) {
1021                 RTE_LOG(INFO, VHOST_DATA,
1022                         "(%d) Failed to add device to data core\n",
1023                         vid);
1024                 vdev->ready = DEVICE_SAFE_REMOVE;
1025                 destroy_device(vid);
1026                 rte_free(vdev->regions_hpa);
1027                 rte_free(vdev);
1028                 return -1;
1029         }
1030         ll_dev->vdev = vdev;
1031         vdev->coreid = core_add;
1032
1033         add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
1034                         ll_dev);
1035
1036         /* Initialize device stats */
1037         memset(&dev_statistics[vid], 0,
1038                 sizeof(struct device_statistics));
1039
1040         /* Disable notifications. */
1041         rte_vhost_enable_guest_notification(vid, VIRTIO_RXQ, 0);
1042         rte_vhost_enable_guest_notification(vid, VIRTIO_TXQ, 0);
1043         lcore_info[vdev->coreid].lcore_ll->device_num++;
1044
1045         RTE_LOG(INFO, VHOST_DATA, "(%d) Device has been added to data core %d\n",
1046                 vid, vdev->coreid);
1047
1048         return 0;
1049 }
1050
1051 /**
1052  * These callback allow devices to be added to the data core when configuration
1053  * has been fully complete.
1054  */
1055 static const struct vhost_device_ops virtio_net_device_ops = {
1056         .new_device =  new_device,
1057         .destroy_device = destroy_device,
1058 };
1059
1060 /**
1061  * This is a thread will wake up after a period to print stats if the user has
1062  * enabled them.
1063  */
1064 static void *
1065 print_stats(__rte_unused void *arg)
1066 {
1067         struct virtio_net_data_ll *dev_ll;
1068         uint64_t tx_dropped, rx_dropped;
1069         uint64_t tx, tx_total, rx, rx_total, rx_ip_csum, rx_l4_csum;
1070         int vid;
1071         const char clr[] = { 27, '[', '2', 'J', '\0' };
1072         const char top_left[] = { 27, '[', '1', ';', '1', 'H', '\0' };
1073
1074         while (1) {
1075                 sleep(enable_stats);
1076
1077                 /* Clear screen and move to top left */
1078                 printf("%s%s", clr, top_left);
1079
1080                 printf("\nDevice statistics ================================");
1081
1082                 dev_ll = ll_root_used;
1083                 while (dev_ll != NULL) {
1084                         vid = dev_ll->vdev->vid;
1085                         tx_total = dev_statistics[vid].tx_total;
1086                         tx = dev_statistics[vid].tx;
1087                         tx_dropped = tx_total - tx;
1088
1089                         rx_total = rte_atomic64_read(
1090                                 &dev_statistics[vid].rx_total_atomic);
1091                         rx = rte_atomic64_read(
1092                                 &dev_statistics[vid].rx_atomic);
1093                         rx_dropped = rx_total - rx;
1094                         rx_ip_csum = rte_atomic64_read(
1095                                 &dev_statistics[vid].rx_bad_ip_csum);
1096                         rx_l4_csum = rte_atomic64_read(
1097                                 &dev_statistics[vid].rx_bad_l4_csum);
1098
1099                         printf("\nStatistics for device %d ----------"
1100                                         "\nTX total:            %"PRIu64""
1101                                         "\nTX dropped:          %"PRIu64""
1102                                         "\nTX successful:               %"PRIu64""
1103                                         "\nRX total:            %"PRIu64""
1104                                         "\nRX bad IP csum:      %"PRIu64""
1105                                         "\nRX bad L4 csum:      %"PRIu64""
1106                                         "\nRX dropped:          %"PRIu64""
1107                                         "\nRX successful:               %"PRIu64"",
1108                                         vid,
1109                                         tx_total,
1110                                         tx_dropped,
1111                                         tx,
1112                                         rx_total,
1113                                         rx_ip_csum,
1114                                         rx_l4_csum,
1115                                         rx_dropped,
1116                                         rx);
1117
1118                         dev_ll = dev_ll->next;
1119                 }
1120                 printf("\n================================================\n");
1121         }
1122
1123         return NULL;
1124 }
1125
1126 /**
1127  * Main function, does initialisation and calls the per-lcore functions.
1128  */
1129 int
1130 main(int argc, char *argv[])
1131 {
1132         struct rte_mempool *mbuf_pool = NULL;
1133         unsigned lcore_id, core_id = 0;
1134         unsigned nb_ports, valid_nb_ports;
1135         int ret;
1136         uint16_t portid;
1137         uint16_t queue_id;
1138         static pthread_t tid;
1139
1140         /* init EAL */
1141         ret = rte_eal_init(argc, argv);
1142         if (ret < 0)
1143                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
1144         argc -= ret;
1145         argv += ret;
1146
1147         /* parse app arguments */
1148         ret = tep_termination_parse_args(argc, argv);
1149         if (ret < 0)
1150                 rte_exit(EXIT_FAILURE, "Invalid argument\n");
1151
1152         for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
1153                 if (rte_lcore_is_enabled(lcore_id))
1154                         lcore_ids[core_id++] = lcore_id;
1155
1156         /* set the number of swithcing cores available */
1157         nb_switching_cores = rte_lcore_count()-1;
1158
1159         /* Get the number of physical ports. */
1160         nb_ports = rte_eth_dev_count_avail();
1161
1162         /*
1163          * Update the global var NB_PORTS and global array PORTS
1164          * and get value of var VALID_NB_PORTS according to system ports number
1165          */
1166         valid_nb_ports = check_ports_num(nb_ports);
1167
1168         if ((valid_nb_ports == 0) || (valid_nb_ports > MAX_SUP_PORTS)) {
1169                 rte_exit(EXIT_FAILURE, "Current enabled port number is %u,"
1170                         "but only %u port can be enabled\n", nb_ports,
1171                         MAX_SUP_PORTS);
1172         }
1173         /* Create the mbuf pool. */
1174         mbuf_pool = rte_pktmbuf_pool_create(
1175                         "MBUF_POOL",
1176                         NUM_MBUFS_PER_PORT * valid_nb_ports,
1177                         MBUF_CACHE_SIZE,
1178                         0,
1179                         MBUF_DATA_SIZE,
1180                         rte_socket_id());
1181         if (mbuf_pool == NULL)
1182                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
1183
1184         for (queue_id = 0; queue_id < MAX_QUEUES + 1; queue_id++)
1185                 vpool_array[queue_id].pool = mbuf_pool;
1186
1187         /* initialize all ports */
1188         RTE_ETH_FOREACH_DEV(portid) {
1189                 /* skip ports that are not enabled */
1190                 if ((enabled_port_mask & (1 << portid)) == 0) {
1191                         RTE_LOG(INFO, VHOST_PORT,
1192                                 "Skipping disabled port %d\n", portid);
1193                         continue;
1194                 }
1195                 if (overlay_options.port_configure(portid, mbuf_pool) != 0)
1196                         rte_exit(EXIT_FAILURE,
1197                                 "Cannot initialize network ports\n");
1198         }
1199
1200         /* Initialise all linked lists. */
1201         if (init_data_ll() == -1)
1202                 rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
1203
1204         /* Initialize device stats */
1205         memset(&dev_statistics, 0, sizeof(dev_statistics));
1206
1207         /* Enable stats if the user option is set. */
1208         if (enable_stats) {
1209                 ret = rte_ctrl_thread_create(&tid, "print-stats", NULL,
1210                                         print_stats, NULL);
1211                 if (ret < 0)
1212                         rte_exit(EXIT_FAILURE, "Cannot create print-stats thread\n");
1213         }
1214
1215         /* Launch all data cores. */
1216         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
1217                 rte_eal_remote_launch(switch_worker,
1218                         mbuf_pool, lcore_id);
1219         }
1220
1221         ret = rte_vhost_driver_register((char *)&dev_basename, 0);
1222         if (ret != 0)
1223                 rte_exit(EXIT_FAILURE, "failed to register vhost driver.\n");
1224
1225         rte_vhost_driver_disable_features(dev_basename,
1226                 1ULL << VIRTIO_NET_F_MRG_RXBUF);
1227
1228         ret = rte_vhost_driver_callback_register(dev_basename,
1229                 &virtio_net_device_ops);
1230         if (ret != 0) {
1231                 rte_exit(EXIT_FAILURE,
1232                         "failed to register vhost driver callbacks.\n");
1233         }
1234
1235         if (rte_vhost_driver_start(dev_basename) < 0) {
1236                 rte_exit(EXIT_FAILURE,
1237                         "failed to start vhost driver.\n");
1238         }
1239
1240         RTE_LCORE_FOREACH_SLAVE(lcore_id)
1241                 rte_eal_wait_lcore(lcore_id);
1242
1243         return 0;
1244 }