examples/tep_termination/main.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <arpa/inet.h>
  35 #include <getopt.h>
  36 #include <linux/if_ether.h>
  37 #include <linux/if_vlan.h>
  38 #include <linux/virtio_net.h>
  39 #include <linux/virtio_ring.h>
  40 #include <signal.h>
  41 #include <stdint.h>
  42 #include <sys/eventfd.h>
  43 #include <sys/param.h>
  44 #include <unistd.h>
  45
  46 #include <rte_atomic.h>
  47 #include <rte_cycles.h>
  48 #include <rte_ethdev.h>
  49 #include <rte_log.h>
  50 #include <rte_string_fns.h>
  51 #include <rte_malloc.h>
  52 #include <rte_virtio_net.h>
  53
  54 #include "main.h"
  55 #include "vxlan.h"
  56 #include "vxlan_setup.h"
  57
  58 /* the maximum number of external ports supported */
  59 #define MAX_SUP_PORTS 1
  60
  61 /**
  62  * Calculate the number of buffers needed per port
  63  */
  64 #define NUM_MBUFS_PER_PORT ((MAX_QUEUES * RTE_TEST_RX_DESC_DEFAULT) +\
  65                                 (nb_switching_cores * MAX_PKT_BURST) +\
  66                                 (nb_switching_cores * \
  67                                 RTE_TEST_TX_DESC_DEFAULT) +\
  68                                 (nb_switching_cores * MBUF_CACHE_SIZE))
  69
  70 #define MBUF_CACHE_SIZE 128
  71 #define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
  72
  73 #define MAX_PKT_BURST 32        /* Max burst size for RX/TX */
  74 #define BURST_TX_DRAIN_US 100   /* TX drain every ~100us */
  75
  76 /* Defines how long we wait between retries on RX */
  77 #define BURST_RX_WAIT_US 15
  78
  79 #define BURST_RX_RETRIES 4      /* Number of retries on RX. */
  80
  81 #define JUMBO_FRAME_MAX_SIZE    0x2600
  82
  83 /* State of virtio device. */
  84 #define DEVICE_MAC_LEARNING 0
  85 #define DEVICE_RX           1
  86 #define DEVICE_SAFE_REMOVE  2
  87
  88 /* Config_core_flag status definitions. */
  89 #define REQUEST_DEV_REMOVAL 1
  90 #define ACK_DEV_REMOVAL     0
  91
  92 /* Configurable number of RX/TX ring descriptors */
  93 #define RTE_TEST_RX_DESC_DEFAULT 1024
  94 #define RTE_TEST_TX_DESC_DEFAULT 512
  95
  96 /* Get first 4 bytes in mbuf headroom. */
  97 #define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \
  98                 + sizeof(struct rte_mbuf)))
  99
 100 #define INVALID_PORT_ID 0xFF
 101
 102 /* Size of buffers used for snprintfs. */
 103 #define MAX_PRINT_BUFF 6072
 104
 105 /* Maximum character device basename size. */
 106 #define MAX_BASENAME_SZ 20
 107
 108 /* Maximum long option length for option parsing. */
 109 #define MAX_LONG_OPT_SZ 64
 110
 111 /* Used to compare MAC addresses. */
 112 #define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
 113
 114 #define CMD_LINE_OPT_NB_DEVICES "nb-devices"
 115 #define CMD_LINE_OPT_UDP_PORT "udp-port"
 116 #define CMD_LINE_OPT_TX_CHECKSUM "tx-checksum"
 117 #define CMD_LINE_OPT_TSO_SEGSZ "tso-segsz"
 118 #define CMD_LINE_OPT_FILTER_TYPE "filter-type"
 119 #define CMD_LINE_OPT_ENCAP "encap"
 120 #define CMD_LINE_OPT_DECAP "decap"
 121 #define CMD_LINE_OPT_RX_RETRY "rx-retry"
 122 #define CMD_LINE_OPT_RX_RETRY_DELAY "rx-retry-delay"
 123 #define CMD_LINE_OPT_RX_RETRY_NUM "rx-retry-num"
 124 #define CMD_LINE_OPT_STATS "stats"
 125 #define CMD_LINE_OPT_DEV_BASENAME "dev-basename"
 126
 127 /* mask of enabled ports */
 128 static uint32_t enabled_port_mask;
 129
 130 /*Number of switching cores enabled*/
 131 static uint32_t nb_switching_cores;
 132
 133 /* number of devices/queues to support*/
 134 uint16_t nb_devices = 2;
 135
 136 /* max ring descriptor, ixgbe, i40e, e1000 all are 4096. */
 137 #define MAX_RING_DESC 4096
 138
 139 struct vpool {
 140         struct rte_mempool *pool;
 141         struct rte_ring *ring;
 142         uint32_t buf_size;
 143 } vpool_array[MAX_QUEUES+MAX_QUEUES];
 144
 145 /* UDP tunneling port */
 146 uint16_t udp_port = 4789;
 147
 148 /* enable/disable inner TX checksum */
 149 uint8_t tx_checksum = 0;
 150
 151 /* TCP segment size */
 152 uint16_t tso_segsz = 0;
 153
 154 /* enable/disable decapsulation */
 155 uint8_t rx_decap = 1;
 156
 157 /* enable/disable encapsulation */
 158 uint8_t tx_encap = 1;
 159
 160 /* RX filter type for tunneling packet */
 161 uint8_t filter_idx = 1;
 162
 163 /* overlay packet operation */
 164 struct ol_switch_ops overlay_options = {
 165         .port_configure = vxlan_port_init,
 166         .tunnel_setup = vxlan_link,
 167         .tunnel_destroy = vxlan_unlink,
 168         .tx_handle = vxlan_tx_pkts,
 169         .rx_handle = vxlan_rx_pkts,
 170         .param_handle = NULL,
 171 };
 172
 173 /* Enable stats. */
 174 uint32_t enable_stats = 0;
 175 /* Enable retries on RX. */
 176 static uint32_t enable_retry = 1;
 177 /* Specify timeout (in useconds) between retries on RX. */
 178 static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
 179 /* Specify the number of retries on RX. */
 180 static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
 181
 182 /* Character device basename. Can be set by user. */
 183 static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
 184
 185 static unsigned lcore_ids[RTE_MAX_LCORE];
 186 uint8_t ports[RTE_MAX_ETHPORTS];
 187
 188 static unsigned nb_ports; /**< The number of ports specified in command line */
 189
 190 /* ethernet addresses of ports */
 191 struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
 192
 193 /* heads for the main used and free linked lists for the data path. */
 194 static struct virtio_net_data_ll *ll_root_used;
 195 static struct virtio_net_data_ll *ll_root_free;
 196
 197 /**
 198  * Array of data core structures containing information on
 199  * individual core linked lists.
 200  */
 201 static struct lcore_info lcore_info[RTE_MAX_LCORE];
 202
 203 /* Used for queueing bursts of TX packets. */
 204 struct mbuf_table {
 205         unsigned len;
 206         unsigned txq_id;
 207         struct rte_mbuf *m_table[MAX_PKT_BURST];
 208 };
 209
 210 /* TX queue for each data core. */
 211 struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
 212
 213 struct device_statistics dev_statistics[MAX_DEVICES];
 214
 215 /**
 216  * Set character device basename.
 217  */
 218 static int
 219 us_vhost_parse_basename(const char *q_arg)
 220 {
 221         /* parse number string */
 222         if (strlen(q_arg) >= MAX_BASENAME_SZ)
 223                 return -1;
 224         else
 225                 snprintf((char *)&dev_basename, MAX_BASENAME_SZ, "%s", q_arg);
 226
 227         return 0;
 228 }
 229
 230 /**
 231  * Parse the portmask provided at run time.
 232  */
 233 static int
 234 parse_portmask(const char *portmask)
 235 {
 236         char *end = NULL;
 237         unsigned long pm;
 238
 239         /* parse hexadecimal string */
 240         pm = strtoul(portmask, &end, 16);
 241         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 242                 return -1;
 243
 244         if (pm == 0)
 245                 return -1;
 246
 247         return pm;
 248 }
 249
 250 /**
 251  * Parse num options at run time.
 252  */
 253 static int
 254 parse_num_opt(const char *q_arg, uint32_t max_valid_value)
 255 {
 256         char *end = NULL;
 257         unsigned long num;
 258
 259         /* parse unsigned int string */
 260         num = strtoul(q_arg, &end, 10);
 261         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 262                 return -1;
 263
 264         if (num > max_valid_value)
 265                 return -1;
 266
 267         return num;
 268 }
 269
 270 /**
 271  * Display usage
 272  */
 273 static void
 274 tep_termination_usage(const char *prgname)
 275 {
 276         RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
 277         "               --udp-port: UDP destination port for VXLAN packet\n"
 278         "               --nb-devices[1-64]: The number of virtIO device\n"
 279         "               --tx-checksum [0|1]: inner Tx checksum offload\n"
 280         "               --tso-segsz [0-N]: TCP segment size\n"
 281         "               --decap [0|1]: tunneling packet decapsulation\n"
 282         "               --encap [0|1]: tunneling packet encapsulation\n"
 283         "               --filter-type[1-3]: filter type for tunneling packet\n"
 284         "                   1: Inner MAC and tenent ID\n"
 285         "                   2: Inner MAC and VLAN, and tenent ID\n"
 286         "                   3: Outer MAC, Inner MAC and tenent ID\n"
 287         "               -p PORTMASK: Set mask for ports to be used by application\n"
 288         "               --rx-retry [0|1]: disable/enable(default) retries on rx."
 289         "                Enable retry if destintation queue is full\n"
 290         "               --rx-retry-delay [0-N]: timeout(in usecond) between retries on RX."
 291         "                This makes effect only if retries on rx enabled\n"
 292         "               --rx-retry-num [0-N]: the number of retries on rx."
 293         "                This makes effect only if retries on rx enabled\n"
 294         "               --stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
 295         "               --dev-basename: The basename to be used for the character device.\n",
 296                prgname);
 297 }
 298
 299 /**
 300  * Parse the arguments given in the command line of the application.
 301  */
 302 static int
 303 tep_termination_parse_args(int argc, char **argv)
 304 {
 305         int opt, ret;
 306         int option_index;
 307         unsigned i;
 308         const char *prgname = argv[0];
 309         static struct option long_option[] = {
 310                 {CMD_LINE_OPT_NB_DEVICES, required_argument, NULL, 0},
 311                 {CMD_LINE_OPT_UDP_PORT, required_argument, NULL, 0},
 312                 {CMD_LINE_OPT_TX_CHECKSUM, required_argument, NULL, 0},
 313                 {CMD_LINE_OPT_TSO_SEGSZ, required_argument, NULL, 0},
 314                 {CMD_LINE_OPT_DECAP, required_argument, NULL, 0},
 315                 {CMD_LINE_OPT_ENCAP, required_argument, NULL, 0},
 316                 {CMD_LINE_OPT_FILTER_TYPE, required_argument, NULL, 0},
 317                 {CMD_LINE_OPT_RX_RETRY, required_argument, NULL, 0},
 318                 {CMD_LINE_OPT_RX_RETRY_DELAY, required_argument, NULL, 0},
 319                 {CMD_LINE_OPT_RX_RETRY_NUM, required_argument, NULL, 0},
 320                 {CMD_LINE_OPT_STATS, required_argument, NULL, 0},
 321                 {CMD_LINE_OPT_DEV_BASENAME, required_argument, NULL, 0},
 322                 {NULL, 0, 0, 0},
 323         };
 324
 325         /* Parse command line */
 326         while ((opt = getopt_long(argc, argv, "p:",
 327                         long_option, &option_index)) != EOF) {
 328                 switch (opt) {
 329                 /* Portmask */
 330                 case 'p':
 331                         enabled_port_mask = parse_portmask(optarg);
 332                         if (enabled_port_mask == 0) {
 333                                 RTE_LOG(INFO, VHOST_CONFIG,
 334                                         "Invalid portmask\n");
 335                                 tep_termination_usage(prgname);
 336                                 return -1;
 337                         }
 338                         break;
 339                 case 0:
 340                         if (!strncmp(long_option[option_index].name,
 341                                 CMD_LINE_OPT_NB_DEVICES,
 342                                 sizeof(CMD_LINE_OPT_NB_DEVICES))) {
 343                                 ret = parse_num_opt(optarg, MAX_DEVICES);
 344                                 if (ret == -1) {
 345                                         RTE_LOG(INFO, VHOST_CONFIG,
 346                                         "Invalid argument for nb-devices [0-%d]\n",
 347                                         MAX_DEVICES);
 348                                         tep_termination_usage(prgname);
 349                                         return -1;
 350                                 } else
 351                                         nb_devices = ret;
 352                         }
 353
 354                         /* Enable/disable retries on RX. */
 355                         if (!strncmp(long_option[option_index].name,
 356                                 CMD_LINE_OPT_RX_RETRY,
 357                                 sizeof(CMD_LINE_OPT_RX_RETRY))) {
 358                                 ret = parse_num_opt(optarg, 1);
 359                                 if (ret == -1) {
 360                                         RTE_LOG(INFO, VHOST_CONFIG,
 361                                                 "Invalid argument for rx-retry [0|1]\n");
 362                                         tep_termination_usage(prgname);
 363                                         return -1;
 364                                 } else
 365                                         enable_retry = ret;
 366                         }
 367
 368                         if (!strncmp(long_option[option_index].name,
 369                                 CMD_LINE_OPT_TSO_SEGSZ,
 370                                 sizeof(CMD_LINE_OPT_TSO_SEGSZ))) {
 371                                 ret = parse_num_opt(optarg, INT16_MAX);
 372                                 if (ret == -1) {
 373                                         RTE_LOG(INFO, VHOST_CONFIG,
 374                                                 "Invalid argument for TCP segment size [0-N]\n");
 375                                         tep_termination_usage(prgname);
 376                                         return -1;
 377                                 } else
 378                                         tso_segsz = ret;
 379                         }
 380
 381                         if (!strncmp(long_option[option_index].name,
 382                                         CMD_LINE_OPT_UDP_PORT,
 383                                         sizeof(CMD_LINE_OPT_UDP_PORT))) {
 384                                 ret = parse_num_opt(optarg, INT16_MAX);
 385                                 if (ret == -1) {
 386                                         RTE_LOG(INFO, VHOST_CONFIG,
 387                                                 "Invalid argument for UDP port [0-N]\n");
 388                                         tep_termination_usage(prgname);
 389                                         return -1;
 390                                 } else
 391                                         udp_port = ret;
 392                         }
 393
 394                         /* Specify the retries delay time (in useconds) on RX.*/
 395                         if (!strncmp(long_option[option_index].name,
 396                                 CMD_LINE_OPT_RX_RETRY_DELAY,
 397                                 sizeof(CMD_LINE_OPT_RX_RETRY_DELAY))) {
 398                                 ret = parse_num_opt(optarg, INT32_MAX);
 399                                 if (ret == -1) {
 400                                         RTE_LOG(INFO, VHOST_CONFIG,
 401                                                 "Invalid argument for rx-retry-delay [0-N]\n");
 402                                         tep_termination_usage(prgname);
 403                                         return -1;
 404                                 } else
 405                                         burst_rx_delay_time = ret;
 406                         }
 407
 408                         /* Specify the retries number on RX. */
 409                         if (!strncmp(long_option[option_index].name,
 410                                 CMD_LINE_OPT_RX_RETRY_NUM,
 411                                 sizeof(CMD_LINE_OPT_RX_RETRY_NUM))) {
 412                                 ret = parse_num_opt(optarg, INT32_MAX);
 413                                 if (ret == -1) {
 414                                         RTE_LOG(INFO, VHOST_CONFIG,
 415                                                 "Invalid argument for rx-retry-num [0-N]\n");
 416                                         tep_termination_usage(prgname);
 417                                         return -1;
 418                                 } else
 419                                         burst_rx_retry_num = ret;
 420                         }
 421
 422                         if (!strncmp(long_option[option_index].name,
 423                                 CMD_LINE_OPT_TX_CHECKSUM,
 424                                 sizeof(CMD_LINE_OPT_TX_CHECKSUM))) {
 425                                 ret = parse_num_opt(optarg, 1);
 426                                 if (ret == -1) {
 427                                         RTE_LOG(INFO, VHOST_CONFIG,
 428                                                 "Invalid argument for tx-checksum [0|1]\n");
 429                                         tep_termination_usage(prgname);
 430                                         return -1;
 431                                 } else
 432                                         tx_checksum = ret;
 433                         }
 434
 435                         if (!strncmp(long_option[option_index].name,
 436                                         CMD_LINE_OPT_FILTER_TYPE,
 437                                         sizeof(CMD_LINE_OPT_FILTER_TYPE))) {
 438                                 ret = parse_num_opt(optarg, 3);
 439                                 if ((ret == -1) || (ret == 0)) {
 440                                         RTE_LOG(INFO, VHOST_CONFIG,
 441                                                 "Invalid argument for filter type [1-3]\n");
 442                                         tep_termination_usage(prgname);
 443                                         return -1;
 444                                 } else
 445                                         filter_idx = ret - 1;
 446                         }
 447
 448                         /* Enable/disable encapsulation on RX. */
 449                         if (!strncmp(long_option[option_index].name,
 450                                 CMD_LINE_OPT_DECAP,
 451                                 sizeof(CMD_LINE_OPT_DECAP))) {
 452                                 ret = parse_num_opt(optarg, 1);
 453                                 if (ret == -1) {
 454                                         RTE_LOG(INFO, VHOST_CONFIG,
 455                                                 "Invalid argument for decap [0|1]\n");
 456                                         tep_termination_usage(prgname);
 457                                         return -1;
 458                                 } else
 459                                         rx_decap = ret;
 460                         }
 461
 462                         /* Enable/disable encapsulation on TX. */
 463                         if (!strncmp(long_option[option_index].name,
 464                                 CMD_LINE_OPT_ENCAP,
 465                                 sizeof(CMD_LINE_OPT_ENCAP))) {
 466                                 ret = parse_num_opt(optarg, 1);
 467                                 if (ret == -1) {
 468                                         RTE_LOG(INFO, VHOST_CONFIG,
 469                                                 "Invalid argument for encap [0|1]\n");
 470                                         tep_termination_usage(prgname);
 471                                         return -1;
 472                                 } else
 473                                         tx_encap = ret;
 474                         }
 475
 476                         /* Enable/disable stats. */
 477                         if (!strncmp(long_option[option_index].name,
 478                                 CMD_LINE_OPT_STATS,
 479                                 sizeof(CMD_LINE_OPT_STATS))) {
 480                                 ret = parse_num_opt(optarg, INT32_MAX);
 481                                 if (ret == -1) {
 482                                         RTE_LOG(INFO, VHOST_CONFIG,
 483                                                         "Invalid argument for stats [0..N]\n");
 484                                         tep_termination_usage(prgname);
 485                                         return -1;
 486                                 } else
 487                                         enable_stats = ret;
 488                         }
 489
 490                         /* Set character device basename. */
 491                         if (!strncmp(long_option[option_index].name,
 492                                 CMD_LINE_OPT_DEV_BASENAME,
 493                                 sizeof(CMD_LINE_OPT_DEV_BASENAME))) {
 494                                 if (us_vhost_parse_basename(optarg) == -1) {
 495                                         RTE_LOG(INFO, VHOST_CONFIG,
 496                                                 "Invalid argument for character "
 497                                                 "device basename (Max %d characters)\n",
 498                                                 MAX_BASENAME_SZ);
 499                                         tep_termination_usage(prgname);
 500                                         return -1;
 501                                 }
 502                         }
 503
 504                         break;
 505
 506                         /* Invalid option - print options. */
 507                 default:
 508                         tep_termination_usage(prgname);
 509                         return -1;
 510                 }
 511         }
 512
 513         for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
 514                 if (enabled_port_mask & (1 << i))
 515                         ports[nb_ports++] = (uint8_t)i;
 516         }
 517
 518         if ((nb_ports ==  0) || (nb_ports > MAX_SUP_PORTS)) {
 519                 RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
 520                         "but only %u port can be enabled\n", nb_ports,
 521                         MAX_SUP_PORTS);
 522                 return -1;
 523         }
 524
 525         return 0;
 526 }
 527
 528 /**
 529  * Update the global var NB_PORTS and array PORTS
 530  * according to system ports number and return valid ports number
 531  */
 532 static unsigned
 533 check_ports_num(unsigned max_nb_ports)
 534 {
 535         unsigned valid_nb_ports = nb_ports;
 536         unsigned portid;
 537
 538         if (nb_ports > max_nb_ports) {
 539                 RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) "
 540                         " exceeds total system port number(%u)\n",
 541                         nb_ports, max_nb_ports);
 542                 nb_ports = max_nb_ports;
 543         }
 544
 545         for (portid = 0; portid < nb_ports; portid++) {
 546                 if (ports[portid] >= max_nb_ports) {
 547                         RTE_LOG(INFO, VHOST_PORT,
 548                                 "\nSpecified port ID(%u) exceeds max "
 549                                 " system port ID(%u)\n",
 550                                 ports[portid], (max_nb_ports - 1));
 551                         ports[portid] = INVALID_PORT_ID;
 552                         valid_nb_ports--;
 553                 }
 554         }
 555         return valid_nb_ports;
 556 }
 557
 558 /**
 559  * This function routes the TX packet to the correct interface. This may be a local device
 560  * or the physical port.
 561  */
 562 static inline void __attribute__((always_inline))
 563 virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m)
 564 {
 565         struct mbuf_table *tx_q;
 566         struct rte_mbuf **m_table;
 567         unsigned len, ret = 0;
 568         const uint16_t lcore_id = rte_lcore_id();
 569         struct virtio_net *dev = vdev->dev;
 570
 571         LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is external\n",
 572                 dev->device_fh);
 573
 574         /* Add packet to the port tx queue */
 575         tx_q = &lcore_tx_queue[lcore_id];
 576         len = tx_q->len;
 577
 578         tx_q->m_table[len] = m;
 579         len++;
 580         if (enable_stats) {
 581                 dev_statistics[dev->device_fh].tx_total++;
 582                 dev_statistics[dev->device_fh].tx++;
 583         }
 584
 585         if (unlikely(len == MAX_PKT_BURST)) {
 586                 m_table = (struct rte_mbuf **)tx_q->m_table;
 587                 ret = overlay_options.tx_handle(ports[0],
 588                         (uint16_t)tx_q->txq_id, m_table,
 589                         (uint16_t)tx_q->len);
 590
 591                 /* Free any buffers not handled by TX and update
 592                  * the port stats.
 593                  */
 594                 if (unlikely(ret < len)) {
 595                         do {
 596                                 rte_pktmbuf_free(m_table[ret]);
 597                         } while (++ret < len);
 598                 }
 599
 600                 len = 0;
 601         }
 602
 603         tx_q->len = len;
 604         return;
 605 }
 606
 607 /**
 608  * This function is called by each data core. It handles all
 609  * RX/TX registered with the core. For TX the specific lcore
 610  * linked list is used. For RX, MAC addresses are compared
 611  * with all devices in the main linked list.
 612  */
 613 static int
 614 switch_worker(__rte_unused void *arg)
 615 {
 616         struct rte_mempool *mbuf_pool = arg;
 617         struct virtio_net *dev = NULL;
 618         struct vhost_dev *vdev = NULL;
 619         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 620         struct virtio_net_data_ll *dev_ll;
 621         struct mbuf_table *tx_q;
 622         volatile struct lcore_ll_info *lcore_ll;
 623         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
 624                                         / US_PER_S * BURST_TX_DRAIN_US;
 625         uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
 626         unsigned i, ret = 0;
 627         const uint16_t lcore_id = rte_lcore_id();
 628         const uint16_t num_cores = (uint16_t)rte_lcore_count();
 629         uint16_t rx_count = 0;
 630         uint16_t tx_count;
 631         uint32_t retry = 0;
 632
 633         RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
 634         lcore_ll = lcore_info[lcore_id].lcore_ll;
 635         prev_tsc = 0;
 636
 637         tx_q = &lcore_tx_queue[lcore_id];
 638         for (i = 0; i < num_cores; i++) {
 639                 if (lcore_ids[i] == lcore_id) {
 640                         tx_q->txq_id = i;
 641                         break;
 642                 }
 643         }
 644
 645         while (1) {
 646                 cur_tsc = rte_rdtsc();
 647                 /*
 648                  * TX burst queue drain
 649                  */
 650                 diff_tsc = cur_tsc - prev_tsc;
 651                 if (unlikely(diff_tsc > drain_tsc)) {
 652
 653                         if (tx_q->len) {
 654                                 LOG_DEBUG(VHOST_DATA, "TX queue drained after "
 655                                         "timeout with burst size %u\n",
 656                                         tx_q->len);
 657                                 ret = overlay_options.tx_handle(ports[0],
 658                                         (uint16_t)tx_q->txq_id,
 659                                         (struct rte_mbuf **)tx_q->m_table,
 660                                         (uint16_t)tx_q->len);
 661                                 if (unlikely(ret < tx_q->len)) {
 662                                         do {
 663                                                 rte_pktmbuf_free(tx_q->m_table[ret]);
 664                                         } while (++ret < tx_q->len);
 665                                 }
 666
 667                                 tx_q->len = 0;
 668                         }
 669
 670                         prev_tsc = cur_tsc;
 671
 672                 }
 673
 674                 rte_prefetch0(lcore_ll->ll_root_used);
 675
 676                 /**
 677                  * Inform the configuration core that we have exited
 678                  * the linked list and that no devices are
 679                  * in use if requested.
 680                  */
 681                 if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
 682                         lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
 683
 684                 /*
 685                  * Process devices
 686                  */
 687                 dev_ll = lcore_ll->ll_root_used;
 688
 689                 while (dev_ll != NULL) {
 690                         vdev = dev_ll->vdev;
 691                         dev = vdev->dev;
 692
 693                         if (unlikely(vdev->remove)) {
 694                                 dev_ll = dev_ll->next;
 695                                 overlay_options.tunnel_destroy(vdev);
 696                                 vdev->ready = DEVICE_SAFE_REMOVE;
 697                                 continue;
 698                         }
 699                         if (likely(vdev->ready == DEVICE_RX)) {
 700                                 /* Handle guest RX */
 701                                 rx_count = rte_eth_rx_burst(ports[0],
 702                                         vdev->rx_q, pkts_burst, MAX_PKT_BURST);
 703
 704                                 if (rx_count) {
 705                                         /*
 706                                         * Retry is enabled and the queue is
 707                                         * full then we wait and retry to
 708                                         * avoid packet loss. Here MAX_PKT_BURST
 709                                         * must be less than virtio queue size
 710                                         */
 711                                         if (enable_retry && unlikely(rx_count >
 712                                                 rte_vring_available_entries(dev, VIRTIO_RXQ))) {
 713                                                 for (retry = 0; retry < burst_rx_retry_num;
 714                                                         retry++) {
 715                                                         rte_delay_us(burst_rx_delay_time);
 716                                                         if (rx_count <= rte_vring_available_entries(dev, VIRTIO_RXQ))
 717                                                                 break;
 718                                                 }
 719                                         }
 720
 721                                         ret_count = overlay_options.rx_handle(dev, pkts_burst, rx_count);
 722                                         if (enable_stats) {
 723                                                 rte_atomic64_add(
 724                                                 &dev_statistics[dev->device_fh].rx_total_atomic,
 725                                                 rx_count);
 726                                                 rte_atomic64_add(
 727                                                 &dev_statistics[dev->device_fh].rx_atomic, ret_count);
 728                                         }
 729                                         while (likely(rx_count)) {
 730                                                 rx_count--;
 731                                                 rte_pktmbuf_free(pkts_burst[rx_count]);
 732                                         }
 733
 734                                 }
 735                         }
 736
 737                         if (likely(!vdev->remove)) {
 738                                 /* Handle guest TX*/
 739                                 tx_count = rte_vhost_dequeue_burst(dev,
 740                                                 VIRTIO_TXQ, mbuf_pool,
 741                                                 pkts_burst, MAX_PKT_BURST);
 742                                 /* If this is the first received packet we need to learn the MAC */
 743                                 if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) {
 744                                         if (vdev->remove ||
 745                                                 (overlay_options.tunnel_setup(vdev, pkts_burst[0]) == -1)) {
 746                                                 while (tx_count)
 747                                                         rte_pktmbuf_free(pkts_burst[--tx_count]);
 748                                         }
 749                                 }
 750                                 while (tx_count)
 751                                         virtio_tx_route(vdev, pkts_burst[--tx_count]);
 752                         }
 753
 754                         /* move to the next device in the list */
 755                         dev_ll = dev_ll->next;
 756                 }
 757         }
 758
 759         return 0;
 760 }
 761
 762 /**
 763  * Add an entry to a used linked list. A free entry must first be found
 764  * in the free linked list using get_data_ll_free_entry();
 765  */
 766 static void
 767 add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
 768         struct virtio_net_data_ll *ll_dev)
 769 {
 770         struct virtio_net_data_ll *ll = *ll_root_addr;
 771
 772         /* Set next as NULL and use a compiler barrier to avoid reordering. */
 773         ll_dev->next = NULL;
 774         rte_compiler_barrier();
 775
 776         /* If ll == NULL then this is the first device. */
 777         if (ll) {
 778                 /* Increment to the tail of the linked list. */
 779                 while (ll->next != NULL)
 780                         ll = ll->next;
 781
 782                 ll->next = ll_dev;
 783         } else {
 784                 *ll_root_addr = ll_dev;
 785         }
 786 }
 787
 788 /**
 789  * Remove an entry from a used linked list. The entry must then be added to
 790  * the free linked list using put_data_ll_free_entry().
 791  */
 792 static void
 793 rm_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
 794         struct virtio_net_data_ll *ll_dev,
 795         struct virtio_net_data_ll *ll_dev_last)
 796 {
 797         struct virtio_net_data_ll *ll = *ll_root_addr;
 798
 799         if (unlikely((ll == NULL) || (ll_dev == NULL)))
 800                 return;
 801
 802         if (ll_dev == ll)
 803                 *ll_root_addr = ll_dev->next;
 804         else
 805                 if (likely(ll_dev_last != NULL))
 806                         ll_dev_last->next = ll_dev->next;
 807                 else
 808                         RTE_LOG(ERR, VHOST_CONFIG,
 809                                 "Remove entry form ll failed.\n");
 810 }
 811
 812 /**
 813  * Find and return an entry from the free linked list.
 814  */
 815 static struct virtio_net_data_ll *
 816 get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
 817 {
 818         struct virtio_net_data_ll *ll_free = *ll_root_addr;
 819         struct virtio_net_data_ll *ll_dev;
 820
 821         if (ll_free == NULL)
 822                 return NULL;
 823
 824         ll_dev = ll_free;
 825         *ll_root_addr = ll_free->next;
 826
 827         return ll_dev;
 828 }
 829
 830 /**
 831  * Place an entry back on to the free linked list.
 832  */
 833 static void
 834 put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr,
 835         struct virtio_net_data_ll *ll_dev)
 836 {
 837         struct virtio_net_data_ll *ll_free = *ll_root_addr;
 838
 839         if (ll_dev == NULL)
 840                 return;
 841
 842         ll_dev->next = ll_free;
 843         *ll_root_addr = ll_dev;
 844 }
 845
 846 /**
 847  * Creates a linked list of a given size.
 848  */
 849 static struct virtio_net_data_ll *
 850 alloc_data_ll(uint32_t size)
 851 {
 852         struct virtio_net_data_ll *ll_new;
 853         uint32_t i;
 854
 855         /* Malloc and then chain the linked list. */
 856         ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
 857         if (ll_new == NULL) {
 858                 RTE_LOG(ERR, VHOST_CONFIG,
 859                         "Failed to allocate memory for ll_new.\n");
 860                 return NULL;
 861         }
 862
 863         for (i = 0; i < size - 1; i++) {
 864                 ll_new[i].vdev = NULL;
 865                 ll_new[i].next = &ll_new[i+1];
 866         }
 867         ll_new[i].next = NULL;
 868
 869         return ll_new;
 870 }
 871
 872 /**
 873  * Create the main linked list along with each individual cores
 874  * linked list. A used and a free list are created to manage entries.
 875  */
 876 static int
 877 init_data_ll(void)
 878 {
 879         int lcore;
 880
 881         RTE_LCORE_FOREACH_SLAVE(lcore) {
 882                 lcore_info[lcore].lcore_ll =
 883                         malloc(sizeof(struct lcore_ll_info));
 884                 if (lcore_info[lcore].lcore_ll == NULL) {
 885                         RTE_LOG(ERR, VHOST_CONFIG,
 886                                 "Failed to allocate memory for lcore_ll.\n");
 887                         return -1;
 888                 }
 889
 890                 lcore_info[lcore].lcore_ll->device_num = 0;
 891                 lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
 892                 lcore_info[lcore].lcore_ll->ll_root_used = NULL;
 893                 if (nb_devices % nb_switching_cores)
 894                         lcore_info[lcore].lcore_ll->ll_root_free =
 895                                 alloc_data_ll((nb_devices / nb_switching_cores)
 896                                                 + 1);
 897                 else
 898                         lcore_info[lcore].lcore_ll->ll_root_free =
 899                                 alloc_data_ll(nb_devices / nb_switching_cores);
 900         }
 901
 902         /* Allocate devices up to a maximum of MAX_DEVICES. */
 903         ll_root_free = alloc_data_ll(MIN((nb_devices), MAX_DEVICES));
 904
 905         return 0;
 906 }
 907
 908 /**
 909  * Remove a device from the specific data core linked list and
 910  * from the main linked list. Synchonization occurs through the use
 911  * of the lcore dev_removal_flag. Device is made volatile here
 912  * to avoid re-ordering of dev->remove=1 which can cause an infinite
 913  * loop in the rte_pause loop.
 914  */
 915 static void
 916 destroy_device(volatile struct virtio_net *dev)
 917 {
 918         struct virtio_net_data_ll *ll_lcore_dev_cur;
 919         struct virtio_net_data_ll *ll_main_dev_cur;
 920         struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
 921         struct virtio_net_data_ll *ll_main_dev_last = NULL;
 922         struct vhost_dev *vdev;
 923         int lcore;
 924
 925         dev->flags &= ~VIRTIO_DEV_RUNNING;
 926
 927         vdev = (struct vhost_dev *)dev->priv;
 928
 929         /* set the remove flag. */
 930         vdev->remove = 1;
 931         while (vdev->ready != DEVICE_SAFE_REMOVE)
 932                 rte_pause();
 933
 934         /* Search for entry to be removed from lcore ll */
 935         ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
 936         while (ll_lcore_dev_cur != NULL) {
 937                 if (ll_lcore_dev_cur->vdev == vdev) {
 938                         break;
 939                 } else {
 940                         ll_lcore_dev_last = ll_lcore_dev_cur;
 941                         ll_lcore_dev_cur = ll_lcore_dev_cur->next;
 942                 }
 943         }
 944
 945         if (ll_lcore_dev_cur == NULL) {
 946                 RTE_LOG(ERR, VHOST_CONFIG,
 947                         "(%"PRIu64") Failed to find the dev to be destroy.\n",
 948                         dev->device_fh);
 949                 return;
 950         }
 951
 952         /* Search for entry to be removed from main ll */
 953         ll_main_dev_cur = ll_root_used;
 954         ll_main_dev_last = NULL;
 955         while (ll_main_dev_cur != NULL) {
 956                 if (ll_main_dev_cur->vdev == vdev) {
 957                         break;
 958                 } else {
 959                         ll_main_dev_last = ll_main_dev_cur;
 960                         ll_main_dev_cur = ll_main_dev_cur->next;
 961                 }
 962         }
 963
 964         /* Remove entries from the lcore and main ll. */
 965         rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
 966                         ll_lcore_dev_cur, ll_lcore_dev_last);
 967         rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
 968
 969         /* Set the dev_removal_flag on each lcore. */
 970         RTE_LCORE_FOREACH_SLAVE(lcore) {
 971                 lcore_info[lcore].lcore_ll->dev_removal_flag =
 972                         REQUEST_DEV_REMOVAL;
 973         }
 974
 975         /*
 976          * Once each core has set the dev_removal_flag to
 977          * ACK_DEV_REMOVAL we can be sure that they can no longer access
 978          * the device removed from the linked lists and that the devices
 979          * are no longer in use.
 980          */
 981         RTE_LCORE_FOREACH_SLAVE(lcore) {
 982                 while (lcore_info[lcore].lcore_ll->dev_removal_flag
 983                         != ACK_DEV_REMOVAL)
 984                         rte_pause();
 985         }
 986
 987         /* Add the entries back to the lcore and main free ll.*/
 988         put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
 989                                 ll_lcore_dev_cur);
 990         put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
 991
 992         /* Decrement number of device on the lcore. */
 993         lcore_info[vdev->coreid].lcore_ll->device_num--;
 994
 995         RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been removed "
 996                 "from data core\n", dev->device_fh);
 997
 998         rte_free(vdev);
 999
1000 }
1001
1002 /**
1003  * A new device is added to a data core. First the device is added
1004  * to the main linked list and the allocated to a specific data core.
1005  */
1006 static int
1007 new_device(struct virtio_net *dev)
1008 {
1009         struct virtio_net_data_ll *ll_dev;
1010         int lcore, core_add = 0;
1011         uint32_t device_num_min = nb_devices;
1012         struct vhost_dev *vdev;
1013
1014         vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
1015         if (vdev == NULL) {
1016                 RTE_LOG(INFO, VHOST_DATA,
1017                         "(%"PRIu64") Couldn't allocate memory for vhost dev\n",
1018                         dev->device_fh);
1019                 return -1;
1020         }
1021         vdev->dev = dev;
1022         dev->priv = vdev;
1023         /* Add device to main ll */
1024         ll_dev = get_data_ll_free_entry(&ll_root_free);
1025         if (ll_dev == NULL) {
1026                 RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in"
1027                         " linked list Device limit of %d devices per core"
1028                         " has been reached\n", dev->device_fh, nb_devices);
1029                 if (vdev->regions_hpa)
1030                         rte_free(vdev->regions_hpa);
1031                 rte_free(vdev);
1032                 return -1;
1033         }
1034         ll_dev->vdev = vdev;
1035         add_data_ll_entry(&ll_root_used, ll_dev);
1036         vdev->rx_q = dev->device_fh;
1037
1038         /* reset ready flag */
1039         vdev->ready = DEVICE_MAC_LEARNING;
1040         vdev->remove = 0;
1041
1042         /* Find a suitable lcore to add the device. */
1043         RTE_LCORE_FOREACH_SLAVE(lcore) {
1044                 if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
1045                         device_num_min = lcore_info[lcore].lcore_ll->device_num;
1046                         core_add = lcore;
1047                 }
1048         }
1049         /* Add device to lcore ll */
1050         ll_dev = get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
1051         if (ll_dev == NULL) {
1052                 RTE_LOG(INFO, VHOST_DATA,
1053                         "(%"PRIu64") Failed to add device to data core\n",
1054                         dev->device_fh);
1055                 vdev->ready = DEVICE_SAFE_REMOVE;
1056                 destroy_device(dev);
1057                 rte_free(vdev->regions_hpa);
1058                 rte_free(vdev);
1059                 return -1;
1060         }
1061         ll_dev->vdev = vdev;
1062         vdev->coreid = core_add;
1063
1064         add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
1065                         ll_dev);
1066
1067         /* Initialize device stats */
1068         memset(&dev_statistics[dev->device_fh], 0,
1069                 sizeof(struct device_statistics));
1070
1071         /* Disable notifications. */
1072         rte_vhost_enable_guest_notification(dev, VIRTIO_RXQ, 0);
1073         rte_vhost_enable_guest_notification(dev, VIRTIO_TXQ, 0);
1074         lcore_info[vdev->coreid].lcore_ll->device_num++;
1075         dev->flags |= VIRTIO_DEV_RUNNING;
1076
1077         RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data core %d\n",
1078                 dev->device_fh, vdev->coreid);
1079
1080         return 0;
1081 }
1082
1083 /**
1084  * These callback allow devices to be added to the data core when configuration
1085  * has been fully complete.
1086  */
1087 static const struct virtio_net_device_ops virtio_net_device_ops = {
1088         .new_device =  new_device,
1089         .destroy_device = destroy_device,
1090 };
1091
1092 /**
1093  * This is a thread will wake up after a period to print stats if the user has
1094  * enabled them.
1095  */
1096 static void
1097 print_stats(void)
1098 {
1099         struct virtio_net_data_ll *dev_ll;
1100         uint64_t tx_dropped, rx_dropped;
1101         uint64_t tx, tx_total, rx, rx_total, rx_ip_csum, rx_l4_csum;
1102         uint32_t device_fh;
1103         const char clr[] = { 27, '[', '2', 'J', '\0' };
1104         const char top_left[] = { 27, '[', '1', ';', '1', 'H', '\0' };
1105
1106         while (1) {
1107                 sleep(enable_stats);
1108
1109                 /* Clear screen and move to top left */
1110                 printf("%s%s", clr, top_left);
1111
1112                 printf("\nDevice statistics ================================");
1113
1114                 dev_ll = ll_root_used;
1115                 while (dev_ll != NULL) {
1116                         device_fh = (uint32_t)dev_ll->vdev->dev->device_fh;
1117                         tx_total = dev_statistics[device_fh].tx_total;
1118                         tx = dev_statistics[device_fh].tx;
1119                         tx_dropped = tx_total - tx;
1120
1121                         rx_total = rte_atomic64_read(
1122                                 &dev_statistics[device_fh].rx_total_atomic);
1123                         rx = rte_atomic64_read(
1124                                 &dev_statistics[device_fh].rx_atomic);
1125                         rx_dropped = rx_total - rx;
1126                         rx_ip_csum = rte_atomic64_read(
1127                                 &dev_statistics[device_fh].rx_bad_ip_csum);
1128                         rx_l4_csum = rte_atomic64_read(
1129                                 &dev_statistics[device_fh].rx_bad_l4_csum);
1130
1131                         printf("\nStatistics for device %"PRIu32" ----------"
1132                                         "\nTX total:            %"PRIu64""
1133                                         "\nTX dropped:          %"PRIu64""
1134                                         "\nTX successful:               %"PRIu64""
1135                                         "\nRX total:            %"PRIu64""
1136                                         "\nRX bad IP csum:      %"PRIu64""
1137                                         "\nRX bad L4 csum:      %"PRIu64""
1138                                         "\nRX dropped:          %"PRIu64""
1139                                         "\nRX successful:               %"PRIu64"",
1140                                         device_fh,
1141                                         tx_total,
1142                                         tx_dropped,
1143                                         tx,
1144                                         rx_total,
1145                                         rx_ip_csum,
1146                                         rx_l4_csum,
1147                                         rx_dropped,
1148                                         rx);
1149
1150                         dev_ll = dev_ll->next;
1151                 }
1152                 printf("\n================================================\n");
1153         }
1154 }
1155
1156 /**
1157  * Main function, does initialisation and calls the per-lcore functions. The CUSE
1158  * device is also registered here to handle the IOCTLs.
1159  */
1160 int
1161 main(int argc, char *argv[])
1162 {
1163         struct rte_mempool *mbuf_pool = NULL;
1164         unsigned lcore_id, core_id = 0;
1165         unsigned nb_ports, valid_nb_ports;
1166         int ret;
1167         uint8_t portid;
1168         uint16_t queue_id;
1169         static pthread_t tid;
1170         char thread_name[RTE_MAX_THREAD_NAME_LEN];
1171
1172         /* init EAL */
1173         ret = rte_eal_init(argc, argv);
1174         if (ret < 0)
1175                 rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
1176         argc -= ret;
1177         argv += ret;
1178
1179         /* parse app arguments */
1180         ret = tep_termination_parse_args(argc, argv);
1181         if (ret < 0)
1182                 rte_exit(EXIT_FAILURE, "Invalid argument\n");
1183
1184         for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
1185                 if (rte_lcore_is_enabled(lcore_id))
1186                         lcore_ids[core_id++] = lcore_id;
1187
1188         /* set the number of swithcing cores available */
1189         nb_switching_cores = rte_lcore_count()-1;
1190
1191         /* Get the number of physical ports. */
1192         nb_ports = rte_eth_dev_count();
1193         if (nb_ports > RTE_MAX_ETHPORTS)
1194                 nb_ports = RTE_MAX_ETHPORTS;
1195
1196         /*
1197          * Update the global var NB_PORTS and global array PORTS
1198          * and get value of var VALID_NB_PORTS according to system ports number
1199          */
1200         valid_nb_ports = check_ports_num(nb_ports);
1201
1202         if ((valid_nb_ports == 0) || (valid_nb_ports > MAX_SUP_PORTS)) {
1203                 rte_exit(EXIT_FAILURE, "Current enabled port number is %u,"
1204                         "but only %u port can be enabled\n", nb_ports,
1205                         MAX_SUP_PORTS);
1206         }
1207         /* Create the mbuf pool. */
1208         mbuf_pool = rte_mempool_create(
1209                         "MBUF_POOL",
1210                         NUM_MBUFS_PER_PORT
1211                         * valid_nb_ports,
1212                         MBUF_SIZE, MBUF_CACHE_SIZE,
1213                         sizeof(struct rte_pktmbuf_pool_private),
1214                         rte_pktmbuf_pool_init, NULL,
1215                         rte_pktmbuf_init, NULL,
1216                         rte_socket_id(), 0);
1217         if (mbuf_pool == NULL)
1218                 rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
1219
1220         for (queue_id = 0; queue_id < MAX_QUEUES + 1; queue_id++)
1221                 vpool_array[queue_id].pool = mbuf_pool;
1222
1223         /* Set log level. */
1224         rte_set_log_level(LOG_LEVEL);
1225
1226         /* initialize all ports */
1227         for (portid = 0; portid < nb_ports; portid++) {
1228                 /* skip ports that are not enabled */
1229                 if ((enabled_port_mask & (1 << portid)) == 0) {
1230                         RTE_LOG(INFO, VHOST_PORT,
1231                                 "Skipping disabled port %d\n", portid);
1232                         continue;
1233                 }
1234                 if (overlay_options.port_configure(portid, mbuf_pool) != 0)
1235                         rte_exit(EXIT_FAILURE,
1236                                 "Cannot initialize network ports\n");
1237         }
1238
1239         /* Initialise all linked lists. */
1240         if (init_data_ll() == -1)
1241                 rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
1242
1243         /* Initialize device stats */
1244         memset(&dev_statistics, 0, sizeof(dev_statistics));
1245
1246         /* Enable stats if the user option is set. */
1247         if (enable_stats) {
1248                 ret = pthread_create(&tid, NULL, (void *)print_stats, NULL);
1249                 if (ret != 0)
1250                         rte_exit(EXIT_FAILURE, "Cannot create print-stats thread\n");
1251                 snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN, "print-stats");
1252                 ret = rte_thread_setname(tid, thread_name);
1253                 if (ret != 0)
1254                         RTE_LOG(ERR, VHOST_CONFIG, "Cannot set print-stats name\n");
1255         }
1256
1257         /* Launch all data cores. */
1258         RTE_LCORE_FOREACH_SLAVE(lcore_id) {
1259                 rte_eal_remote_launch(switch_worker,
1260                         mbuf_pool, lcore_id);
1261         }
1262         rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_MRG_RXBUF);
1263
1264         /* Register CUSE device to handle IOCTLs. */
1265         ret = rte_vhost_driver_register((char *)&dev_basename);
1266         if (ret != 0)
1267                 rte_exit(EXIT_FAILURE, "CUSE device setup failure.\n");
1268
1269         rte_vhost_driver_callback_register(&virtio_net_device_ops);
1270
1271         /* Start CUSE session. */
1272         rte_vhost_driver_session_start();
1273
1274         return 0;
1275 }