examples/multi_process/l2fwd_fork/main.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2016 Intel Corporation
   3  */
   4 #define _GNU_SOURCE
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <unistd.h>
   8 #include <string.h>
   9 #include <stdint.h>
  10 #include <sched.h>
  11 #include <inttypes.h>
  12 #include <sys/types.h>
  13 #include <sys/queue.h>
  14 #include <netinet/in.h>
  15 #include <setjmp.h>
  16 #include <stdarg.h>
  17 #include <ctype.h>
  18 #include <errno.h>
  19 #include <getopt.h>
  20
  21 #include <rte_common.h>
  22 #include <rte_log.h>
  23 #include <rte_memory.h>
  24 #include <rte_memcpy.h>
  25 #include <rte_eal.h>
  26 #include <rte_launch.h>
  27 #include <rte_atomic.h>
  28 #include <rte_spinlock.h>
  29 #include <rte_cycles.h>
  30 #include <rte_prefetch.h>
  31 #include <rte_lcore.h>
  32 #include <rte_per_lcore.h>
  33 #include <rte_branch_prediction.h>
  34 #include <rte_interrupts.h>
  35 #include <rte_random.h>
  36 #include <rte_debug.h>
  37 #include <rte_ether.h>
  38 #include <rte_ethdev.h>
  39 #include <rte_ring.h>
  40 #include <rte_mempool.h>
  41 #include <rte_mbuf.h>
  42 #include <rte_malloc.h>
  43
  44 #include "flib.h"
  45
  46 #define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
  47 #define MBUF_NAME       "mbuf_pool_%d"
  48 #define MBUF_DATA_SIZE  RTE_MBUF_DEFAULT_BUF_SIZE
  49 #define NB_MBUF   8192
  50 #define RING_MASTER_NAME        "l2fwd_ring_m2s_"
  51 #define RING_SLAVE_NAME         "l2fwd_ring_s2m_"
  52 #define MAX_NAME_LEN    32
  53 /* RECREATE flag indicate needs initialize resource and launch slave_core again */
  54 #define SLAVE_RECREATE_FLAG 0x1
  55 /* RESTART flag indicate needs restart port and send START command again */
  56 #define SLAVE_RESTART_FLAG 0x2
  57 #define INVALID_MAPPING_ID      ((unsigned)LCORE_ID_ANY)
  58 /* Maximum message buffer per slave */
  59 #define NB_CORE_MSGBUF  32
  60 enum l2fwd_cmd{
  61         CMD_START,
  62         CMD_STOP,
  63 };
  64
  65 #define MAX_PKT_BURST 32
  66 #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
  67
  68 /*
  69  * Configurable number of RX/TX ring descriptors
  70  */
  71 #define RTE_TEST_RX_DESC_DEFAULT 1024
  72 #define RTE_TEST_TX_DESC_DEFAULT 1024
  73 static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
  74 static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;
  75
  76 /* ethernet addresses of ports */
  77 static struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];
  78
  79 /* mask of enabled ports */
  80 static uint32_t l2fwd_enabled_port_mask = 0;
  81
  82 /* list of enabled ports */
  83 static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];
  84
  85 static unsigned int l2fwd_rx_queue_per_lcore = 1;
  86
  87 struct mbuf_table {
  88         unsigned len;
  89         struct rte_mbuf *m_table[MAX_PKT_BURST];
  90 };
  91
  92 #define MAX_RX_QUEUE_PER_LCORE 16
  93 #define MAX_TX_QUEUE_PER_PORT 16
  94 struct lcore_queue_conf {
  95         unsigned n_rx_port;
  96         unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
  97 } __rte_cache_aligned;
  98 struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];
  99
 100 struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
 101
 102 struct lcore_resource_struct {
 103         int enabled;    /* Only set in case this lcore involved into packet forwarding */
 104         int flags;          /* Set only slave need to restart or recreate */
 105         unsigned lcore_id;  /*  lcore ID */
 106         unsigned pair_id;       /* dependency lcore ID on port */
 107         char ring_name[2][MAX_NAME_LEN];
 108         /* ring[0] for master send cmd, slave read */
 109         /* ring[1] for slave send ack, master read */
 110         struct rte_ring *ring[2];
 111         int port_num;                                   /* Total port numbers */
 112         /* Port id for that lcore to receive packets */
 113         uint16_t port[RTE_MAX_ETHPORTS];
 114 }__attribute__((packed)) __rte_cache_aligned;
 115
 116 static struct lcore_resource_struct lcore_resource[RTE_MAX_LCORE];
 117 static struct rte_mempool *message_pool;
 118 static rte_spinlock_t res_lock = RTE_SPINLOCK_INITIALIZER;
 119 /* use floating processes */
 120 static int float_proc = 0;
 121 /* Save original cpu affinity */
 122 struct cpu_aff_arg{
 123         cpu_set_t set;
 124         size_t size;
 125 }cpu_aff;
 126
 127 static const struct rte_eth_conf port_conf = {
 128         .rxmode = {
 129                 .split_hdr_size = 0,
 130                 .ignore_offload_bitfield = 1,
 131                 .offloads = DEV_RX_OFFLOAD_CRC_STRIP,
 132         },
 133         .txmode = {
 134                 .mq_mode = ETH_MQ_TX_NONE,
 135         },
 136 };
 137
 138 static struct rte_mempool * l2fwd_pktmbuf_pool[RTE_MAX_ETHPORTS];
 139
 140 /* Per-port statistics struct */
 141 struct l2fwd_port_statistics {
 142         uint64_t tx;
 143         uint64_t rx;
 144         uint64_t dropped;
 145 } __rte_cache_aligned;
 146 struct l2fwd_port_statistics *port_statistics;
 147 /**
 148  * pointer to lcore ID mapping array, used to return lcore id in case slave
 149  * process exited unexpectedly, use only floating process option applied
 150  **/
 151 unsigned *mapping_id;
 152
 153 /* A tsc-based timer responsible for triggering statistics printout */
 154 #define TIMER_MILLISECOND 2000000ULL /* around 1ms at 2 Ghz */
 155 #define MAX_TIMER_PERIOD 86400 /* 1 day max */
 156 static int64_t timer_period = 10 * TIMER_MILLISECOND * 1000; /* default period is 10 seconds */
 157
 158 static int l2fwd_launch_one_lcore(void *dummy);
 159
 160 /* Print out statistics on packets dropped */
 161 static void
 162 print_stats(void)
 163 {
 164         uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
 165         unsigned portid;
 166
 167         total_packets_dropped = 0;
 168         total_packets_tx = 0;
 169         total_packets_rx = 0;
 170
 171         const char clr[] = { 27, '[', '2', 'J', '\0' };
 172         const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };
 173
 174                 /* Clear screen and move to top left */
 175         printf("%s%s", clr, topLeft);
 176
 177         printf("\nPort statistics ====================================");
 178
 179         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
 180                 /* skip disabled ports */
 181                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
 182                         continue;
 183                 printf("\nStatistics for port %u ------------------------------"
 184                            "\nPackets sent: %24"PRIu64
 185                            "\nPackets received: %20"PRIu64
 186                            "\nPackets dropped: %21"PRIu64,
 187                            portid,
 188                            port_statistics[portid].tx,
 189                            port_statistics[portid].rx,
 190                            port_statistics[portid].dropped);
 191
 192                 total_packets_dropped += port_statistics[portid].dropped;
 193                 total_packets_tx += port_statistics[portid].tx;
 194                 total_packets_rx += port_statistics[portid].rx;
 195         }
 196         printf("\nAggregate statistics ==============================="
 197                    "\nTotal packets sent: %18"PRIu64
 198                    "\nTotal packets received: %14"PRIu64
 199                    "\nTotal packets dropped: %15"PRIu64,
 200                    total_packets_tx,
 201                    total_packets_rx,
 202                    total_packets_dropped);
 203         printf("\n====================================================\n");
 204 }
 205
 206 static int
 207 clear_cpu_affinity(void)
 208 {
 209         int s;
 210
 211         s = sched_setaffinity(0, cpu_aff.size, &cpu_aff.set);
 212         if (s != 0) {
 213                 printf("sched_setaffinity failed:%s\n", strerror(errno));
 214                 return -1;
 215         }
 216
 217         return 0;
 218 }
 219
 220 static int
 221 get_cpu_affinity(void)
 222 {
 223         int s;
 224
 225         cpu_aff.size = sizeof(cpu_set_t);
 226         CPU_ZERO(&cpu_aff.set);
 227
 228         s = sched_getaffinity(0, cpu_aff.size, &cpu_aff.set);
 229         if (s != 0) {
 230                 printf("sched_getaffinity failed:%s\n", strerror(errno));
 231                 return -1;
 232         }
 233
 234         return 0;
 235 }
 236
 237 /**
 238  * This fnciton demonstrates the approach to create ring in first instance
 239  * or re-attach an existed ring in later instance.
 240  **/
 241 static struct rte_ring *
 242 create_ring(const char *name, unsigned count,
 243                                         int socket_id,unsigned flags)
 244 {
 245         struct rte_ring *ring;
 246
 247         if (name == NULL)
 248                 return NULL;
 249
 250         /* If already create, just attached it */
 251         if (likely((ring = rte_ring_lookup(name)) != NULL))
 252                 return ring;
 253
 254         /* First call it, create one */
 255         return rte_ring_create(name, count, socket_id, flags);
 256 }
 257
 258 /* Malloc with rte_malloc on structures that shared by master and slave */
 259 static int
 260 l2fwd_malloc_shared_struct(void)
 261 {
 262         port_statistics = rte_zmalloc("port_stat",
 263                                                 sizeof(struct l2fwd_port_statistics) * RTE_MAX_ETHPORTS,
 264                                                 0);
 265         if (port_statistics == NULL)
 266                 return -1;
 267
 268         /* allocate  mapping_id array */
 269         if (float_proc) {
 270                 int i;
 271                 mapping_id = rte_malloc("mapping_id", sizeof(unsigned) * RTE_MAX_LCORE,
 272                                                                 0);
 273
 274                 if (mapping_id == NULL)
 275                         return -1;
 276
 277                 for (i = 0 ;i < RTE_MAX_LCORE; i++)
 278                         mapping_id[i] = INVALID_MAPPING_ID;
 279         }
 280         return 0;
 281 }
 282
 283 /* Create ring which used for communicate among master and slave */
 284 static int
 285 create_ms_ring(unsigned slaveid)
 286 {
 287         unsigned flag = RING_F_SP_ENQ | RING_F_SC_DEQ;
 288         struct lcore_resource_struct *res = &lcore_resource[slaveid];
 289         unsigned socketid = rte_socket_id();
 290
 291         /* Always assume create ring on master socket_id */
 292         /* Default only create a ring size 32 */
 293         snprintf(res->ring_name[0], MAX_NAME_LEN, "%s%u",
 294                         RING_MASTER_NAME, slaveid);
 295         if ((res->ring[0] = create_ring(res->ring_name[0], NB_CORE_MSGBUF,
 296                                 socketid, flag)) == NULL) {
 297                 printf("Create m2s ring %s failed\n", res->ring_name[0]);
 298                 return -1;
 299         }
 300
 301         snprintf(res->ring_name[1], MAX_NAME_LEN, "%s%u",
 302                         RING_SLAVE_NAME, slaveid);
 303         if ((res->ring[1] = create_ring(res->ring_name[1], NB_CORE_MSGBUF,
 304                 socketid, flag)) == NULL) {
 305                 printf("Create s2m ring %s failed\n", res->ring_name[1]);
 306                 return -1;
 307         }
 308
 309         return 0;
 310 }
 311
 312 /* send command to pair in paired master and slave ring */
 313 static inline int
 314 sendcmd(unsigned slaveid, enum l2fwd_cmd cmd, int is_master)
 315 {
 316         struct lcore_resource_struct *res = &lcore_resource[slaveid];
 317         void *msg;
 318         int fd = !is_master;
 319
 320         /* Only check master, it must be enabled and running if it is slave */
 321         if (is_master && !res->enabled)
 322                 return -1;
 323
 324         if (res->ring[fd] == NULL)
 325                 return -1;
 326
 327         if (rte_mempool_get(message_pool, &msg) < 0) {
 328                 printf("Error to get message buffer\n");
 329                 return -1;
 330         }
 331
 332         *(enum l2fwd_cmd *)msg = cmd;
 333
 334         if (rte_ring_enqueue(res->ring[fd], msg) != 0) {
 335                 printf("Enqueue error\n");
 336                 rte_mempool_put(message_pool, msg);
 337                 return -1;
 338         }
 339
 340         return 0;
 341 }
 342
 343 /* Get command from pair in paired master and slave ring */
 344 static inline int
 345 getcmd(unsigned slaveid, enum l2fwd_cmd *cmd, int is_master)
 346 {
 347         struct lcore_resource_struct *res = &lcore_resource[slaveid];
 348         void *msg;
 349         int fd = !!is_master;
 350         int ret;
 351         /* Only check master, it must be enabled and running if it is slave */
 352         if (is_master && (!res->enabled))
 353                 return -1;
 354
 355         if (res->ring[fd] == NULL)
 356                 return -1;
 357
 358         ret = rte_ring_dequeue(res->ring[fd], &msg);
 359
 360         if (ret == 0) {
 361                 *cmd = *(enum l2fwd_cmd *)msg;
 362                 rte_mempool_put(message_pool, msg);
 363         }
 364         return ret;
 365 }
 366
 367 /* Master send command to slave and wait until ack received or error met */
 368 static int
 369 master_sendcmd_with_ack(unsigned slaveid, enum l2fwd_cmd cmd)
 370 {
 371         enum l2fwd_cmd ack_cmd;
 372         int ret = -1;
 373
 374         if (sendcmd(slaveid, cmd, 1) != 0)
 375                 rte_exit(EXIT_FAILURE, "Failed to send message\n");
 376
 377         /* Get ack */
 378         while (1) {
 379                 ret = getcmd(slaveid, &ack_cmd, 1);
 380                 if (ret == 0 && cmd == ack_cmd)
 381                         break;
 382
 383                 /* If slave not running yet, return an error */
 384                 if (flib_query_slave_status(slaveid) != ST_RUN) {
 385                         ret = -ENOENT;
 386                         break;
 387                 }
 388         }
 389
 390         return ret;
 391 }
 392
 393 /* restart all port that assigned to that slave lcore */
 394 static int
 395 reset_slave_all_ports(unsigned slaveid)
 396 {
 397         struct lcore_resource_struct *slave = &lcore_resource[slaveid];
 398         int i, ret = 0;
 399
 400         /* stop/start port */
 401         for (i = 0; i < slave->port_num; i++) {
 402                 char buf_name[RTE_MEMPOOL_NAMESIZE];
 403                 struct rte_mempool *pool;
 404                 printf("Stop port :%d\n", slave->port[i]);
 405                 rte_eth_dev_stop(slave->port[i]);
 406                 snprintf(buf_name, RTE_MEMPOOL_NAMESIZE, MBUF_NAME, slave->port[i]);
 407                 pool = rte_mempool_lookup(buf_name);
 408                 if (pool)
 409                         printf("Port %d mempool free object is %u(%u)\n", slave->port[i],
 410                                 rte_mempool_avail_count(pool),
 411                                 (unsigned int)NB_MBUF);
 412                 else
 413                         printf("Can't find mempool %s\n", buf_name);
 414
 415                 printf("Start port :%d\n", slave->port[i]);
 416                 ret = rte_eth_dev_start(slave->port[i]);
 417                 if (ret != 0)
 418                         break;
 419         }
 420         return ret;
 421 }
 422
 423 static int
 424 reset_shared_structures(unsigned slaveid)
 425 {
 426         int ret;
 427         /* Only port are shared resource here */
 428         ret = reset_slave_all_ports(slaveid);
 429
 430         return ret;
 431 }
 432
 433 /**
 434  * Call this function to re-create resource that needed for slave process that
 435  * exited in last instance
 436  **/
 437 static int
 438 init_slave_res(unsigned slaveid)
 439 {
 440         struct lcore_resource_struct *slave = &lcore_resource[slaveid];
 441         enum l2fwd_cmd cmd;
 442
 443         if (!slave->enabled) {
 444                 printf("Something wrong with lcore=%u enabled=%d\n",slaveid,
 445                         slave->enabled);
 446                 return -1;
 447         }
 448
 449         /* Initialize ring */
 450         if (create_ms_ring(slaveid) != 0)
 451                 rte_exit(EXIT_FAILURE, "failed to create ring for slave %u\n",
 452                                 slaveid);
 453
 454         /* drain un-read buffer if have */
 455         while (getcmd(slaveid, &cmd, 1) == 0);
 456         while (getcmd(slaveid, &cmd, 0) == 0);
 457
 458         return 0;
 459 }
 460
 461 static int
 462 recreate_one_slave(unsigned slaveid)
 463 {
 464         int ret = 0;
 465         /* Re-initialize resource for stalled slave */
 466         if ((ret = init_slave_res(slaveid)) != 0) {
 467                 printf("Init slave=%u failed\n", slaveid);
 468                 return ret;
 469         }
 470
 471         if ((ret = flib_remote_launch(l2fwd_launch_one_lcore, NULL, slaveid))
 472                 != 0)
 473                 printf("Launch slave %u failed\n", slaveid);
 474
 475         return ret;
 476 }
 477
 478 /**
 479  * remapping resource belong to slave_id to new lcore that gets from flib_assign_lcore_id(),
 480  * used only floating process option applied.
 481  *
 482  * @param slaveid
 483  *   original lcore_id that apply for remapping
 484  */
 485 static void
 486 remapping_slave_resource(unsigned slaveid, unsigned map_id)
 487 {
 488
 489         /* remapping lcore_resource */
 490         memcpy(&lcore_resource[map_id], &lcore_resource[slaveid],
 491                         sizeof(struct lcore_resource_struct));
 492
 493         /* remapping lcore_queue_conf */
 494         memcpy(&lcore_queue_conf[map_id], &lcore_queue_conf[slaveid],
 495                         sizeof(struct lcore_queue_conf));
 496 }
 497
 498 static int
 499 reset_pair(unsigned slaveid, unsigned pairid)
 500 {
 501         int ret;
 502         if ((ret = reset_shared_structures(slaveid)) != 0)
 503                 goto back;
 504
 505         if((ret = reset_shared_structures(pairid)) != 0)
 506                 goto back;
 507
 508         if (float_proc) {
 509                 unsigned map_id = mapping_id[slaveid];
 510
 511                 if (map_id != INVALID_MAPPING_ID) {
 512                         printf("%u return mapping id %u\n", slaveid, map_id);
 513                         flib_free_lcore_id(map_id);
 514                         mapping_id[slaveid] = INVALID_MAPPING_ID;
 515                 }
 516
 517                 map_id = mapping_id[pairid];
 518                 if (map_id != INVALID_MAPPING_ID) {
 519                         printf("%u return mapping id %u\n", pairid, map_id);
 520                         flib_free_lcore_id(map_id);
 521                         mapping_id[pairid] = INVALID_MAPPING_ID;
 522                 }
 523         }
 524
 525         if((ret = recreate_one_slave(slaveid)) != 0)
 526                 goto back;
 527
 528         ret = recreate_one_slave(pairid);
 529
 530 back:
 531         return ret;
 532 }
 533
 534 static void
 535 slave_exit_cb(unsigned slaveid, __attribute__((unused))int stat)
 536 {
 537         struct lcore_resource_struct *slave = &lcore_resource[slaveid];
 538
 539         printf("Get slave %u leave info\n", slaveid);
 540         if (!slave->enabled) {
 541                 printf("Lcore=%u not registered for it's exit\n", slaveid);
 542                 return;
 543         }
 544         rte_spinlock_lock(&res_lock);
 545
 546         /* Change the state and wait master to start them */
 547         slave->flags = SLAVE_RECREATE_FLAG;
 548
 549         rte_spinlock_unlock(&res_lock);
 550 }
 551
 552 static void
 553 l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
 554 {
 555         struct ether_hdr *eth;
 556         void *tmp;
 557         unsigned dst_port;
 558         int sent;
 559         struct rte_eth_dev_tx_buffer *buffer;
 560
 561         dst_port = l2fwd_dst_ports[portid];
 562         eth = rte_pktmbuf_mtod(m, struct ether_hdr *);
 563
 564         /* 02:00:00:00:00:xx */
 565         tmp = &eth->d_addr.addr_bytes[0];
 566         *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);
 567
 568         /* src addr */
 569         ether_addr_copy(&l2fwd_ports_eth_addr[dst_port], &eth->s_addr);
 570
 571         buffer = tx_buffer[dst_port];
 572         sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
 573         if (sent)
 574                 port_statistics[dst_port].tx += sent;
 575 }
 576
 577 /* main processing loop */
 578 static void
 579 l2fwd_main_loop(void)
 580 {
 581         struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
 582         struct rte_mbuf *m;
 583         int sent;
 584         unsigned lcore_id;
 585         uint64_t prev_tsc, diff_tsc, cur_tsc;
 586         unsigned i, j, portid, nb_rx;
 587         struct lcore_queue_conf *qconf;
 588         const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S *
 589                         BURST_TX_DRAIN_US;
 590         struct rte_eth_dev_tx_buffer *buffer;
 591
 592         prev_tsc = 0;
 593
 594         lcore_id = rte_lcore_id();
 595
 596         qconf = &lcore_queue_conf[lcore_id];
 597
 598         if (qconf->n_rx_port == 0) {
 599                 RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
 600                 return;
 601         }
 602
 603         RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);
 604
 605         for (i = 0; i < qconf->n_rx_port; i++) {
 606                 portid = qconf->rx_port_list[i];
 607                 RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
 608                         portid);
 609         }
 610
 611         while (1) {
 612                 enum l2fwd_cmd cmd;
 613                 cur_tsc = rte_rdtsc();
 614
 615                 if (unlikely(getcmd(lcore_id, &cmd, 0) == 0)) {
 616                         sendcmd(lcore_id, cmd, 0);
 617
 618                         /* If get stop command, stop forwarding and exit */
 619                         if (cmd == CMD_STOP) {
 620                                 return;
 621                         }
 622                 }
 623
 624                 /*
 625                  * TX burst queue drain
 626                  */
 627                 diff_tsc = cur_tsc - prev_tsc;
 628                 if (unlikely(diff_tsc > drain_tsc)) {
 629
 630                         for (i = 0; i < qconf->n_rx_port; i++) {
 631
 632                                 portid = l2fwd_dst_ports[qconf->rx_port_list[i]];
 633                                 buffer = tx_buffer[portid];
 634
 635                                 sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
 636                                 if (sent)
 637                                         port_statistics[portid].tx += sent;
 638
 639                         }
 640
 641                         prev_tsc = cur_tsc;
 642                 }
 643
 644                 /*
 645                  * Read packet from RX queues
 646                  */
 647                 for (i = 0; i < qconf->n_rx_port; i++) {
 648
 649                         portid = qconf->rx_port_list[i];
 650                         nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
 651                                                  pkts_burst, MAX_PKT_BURST);
 652
 653                         port_statistics[portid].rx += nb_rx;
 654
 655                         for (j = 0; j < nb_rx; j++) {
 656                                 m = pkts_burst[j];
 657                                 rte_prefetch0(rte_pktmbuf_mtod(m, void *));
 658                                 l2fwd_simple_forward(m, portid);
 659                         }
 660                 }
 661         }
 662 }
 663
 664 static int
 665 l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
 666 {
 667         unsigned lcore_id = rte_lcore_id();
 668
 669         if (float_proc) {
 670                 unsigned flcore_id;
 671
 672                 /* Change it to floating process, also change it's lcore_id */
 673                 clear_cpu_affinity();
 674                 RTE_PER_LCORE(_lcore_id) = 0;
 675                 /* Get a lcore_id */
 676                 if (flib_assign_lcore_id() < 0 ) {
 677                         printf("flib_assign_lcore_id failed\n");
 678                         return -1;
 679                 }
 680                 flcore_id = rte_lcore_id();
 681                 /* Set mapping id, so master can return it after slave exited */
 682                 mapping_id[lcore_id] = flcore_id;
 683                 printf("Org lcore_id = %u, cur lcore_id = %u\n",
 684                                 lcore_id, flcore_id);
 685                 remapping_slave_resource(lcore_id, flcore_id);
 686         }
 687
 688         l2fwd_main_loop();
 689
 690         /* return lcore_id before return */
 691         if (float_proc) {
 692                 flib_free_lcore_id(rte_lcore_id());
 693                 mapping_id[lcore_id] = INVALID_MAPPING_ID;
 694         }
 695         return 0;
 696 }
 697
 698 /* display usage */
 699 static void
 700 l2fwd_usage(const char *prgname)
 701 {
 702         printf("%s [EAL options] -- -p PORTMASK -s COREMASK [-q NQ] -f\n"
 703                "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
 704                "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
 705                "  -f use floating process which won't bind to any core to run\n"
 706                    "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n",
 707                prgname);
 708 }
 709
 710 static int
 711 l2fwd_parse_portmask(const char *portmask)
 712 {
 713         char *end = NULL;
 714         unsigned long pm;
 715
 716         /* parse hexadecimal string */
 717         pm = strtoul(portmask, &end, 16);
 718         if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
 719                 return -1;
 720
 721         if (pm == 0)
 722                 return -1;
 723
 724         return pm;
 725 }
 726
 727 static unsigned int
 728 l2fwd_parse_nqueue(const char *q_arg)
 729 {
 730         char *end = NULL;
 731         unsigned long n;
 732
 733         /* parse hexadecimal string */
 734         n = strtoul(q_arg, &end, 10);
 735         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 736                 return 0;
 737         if (n == 0)
 738                 return 0;
 739         if (n >= MAX_RX_QUEUE_PER_LCORE)
 740                 return 0;
 741
 742         return n;
 743 }
 744
 745 static int
 746 l2fwd_parse_timer_period(const char *q_arg)
 747 {
 748         char *end = NULL;
 749         int n;
 750
 751         /* parse number string */
 752         n = strtol(q_arg, &end, 10);
 753         if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
 754                 return -1;
 755         if (n >= MAX_TIMER_PERIOD)
 756                 return -1;
 757
 758         return n;
 759 }
 760
 761 /* Parse the argument given in the command line of the application */
 762 static int
 763 l2fwd_parse_args(int argc, char **argv)
 764 {
 765         int opt, ret;
 766         char **argvopt;
 767         int option_index;
 768         char *prgname = argv[0];
 769         static struct option lgopts[] = {
 770                 {NULL, 0, 0, 0}
 771         };
 772         int has_pmask = 0;
 773
 774         argvopt = argv;
 775
 776         while ((opt = getopt_long(argc, argvopt, "p:q:T:f",
 777                                   lgopts, &option_index)) != EOF) {
 778
 779                 switch (opt) {
 780                 /* portmask */
 781                 case 'p':
 782                         l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
 783                         if (l2fwd_enabled_port_mask == 0) {
 784                                 printf("invalid portmask\n");
 785                                 l2fwd_usage(prgname);
 786                                 return -1;
 787                         }
 788                         has_pmask = 1;
 789                         break;
 790
 791                 /* nqueue */
 792                 case 'q':
 793                         l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
 794                         if (l2fwd_rx_queue_per_lcore == 0) {
 795                                 printf("invalid queue number\n");
 796                                 l2fwd_usage(prgname);
 797                                 return -1;
 798                         }
 799                         break;
 800
 801                 /* timer period */
 802                 case 'T':
 803                         timer_period = l2fwd_parse_timer_period(optarg) * 1000 * TIMER_MILLISECOND;
 804                         if (timer_period < 0) {
 805                                 printf("invalid timer period\n");
 806                                 l2fwd_usage(prgname);
 807                                 return -1;
 808                         }
 809                         break;
 810
 811                 /* use floating process */
 812                 case 'f':
 813                         float_proc = 1;
 814                         break;
 815
 816                 /* long options */
 817                 case 0:
 818                         l2fwd_usage(prgname);
 819                         return -1;
 820
 821                 default:
 822                         l2fwd_usage(prgname);
 823                         return -1;
 824                 }
 825         }
 826
 827         if (optind >= 0)
 828                 argv[optind-1] = prgname;
 829
 830         if (!has_pmask) {
 831                 l2fwd_usage(prgname);
 832                 return -1;
 833         }
 834         ret = optind-1;
 835         optind = 1; /* reset getopt lib */
 836         return ret;
 837 }
 838
 839 /* Check the link status of all ports in up to 9s, and print them finally */
 840 static void
 841 check_all_ports_link_status(uint16_t port_num, uint32_t port_mask)
 842 {
 843 #define CHECK_INTERVAL 100 /* 100ms */
 844 #define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
 845         uint16_t portid;
 846         uint8_t count, all_ports_up, print_flag = 0;
 847         struct rte_eth_link link;
 848
 849         printf("\nChecking link status");
 850         fflush(stdout);
 851         for (count = 0; count <= MAX_CHECK_TIME; count++) {
 852                 all_ports_up = 1;
 853                 for (portid = 0; portid < port_num; portid++) {
 854                         if ((port_mask & (1 << portid)) == 0)
 855                                 continue;
 856                         memset(&link, 0, sizeof(link));
 857                         rte_eth_link_get_nowait(portid, &link);
 858                         /* print link status if flag set */
 859                         if (print_flag == 1) {
 860                                 if (link.link_status)
 861                                         printf(
 862                                         "Port%d Link Up- speed %u Mbps- %s\n",
 863                                         portid, link.link_speed,
 864                                 (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
 865                                         ("full-duplex") : ("half-duplex\n"));
 866                                 else
 867                                         printf("Port %d Link Down\n", portid);
 868                                 continue;
 869                         }
 870                         /* clear all_ports_up flag if any link down */
 871                         if (link.link_status == ETH_LINK_DOWN) {
 872                                 all_ports_up = 0;
 873                                 break;
 874                         }
 875                 }
 876                 /* after finally printing all link status, get out */
 877                 if (print_flag == 1)
 878                         break;
 879
 880                 if (all_ports_up == 0) {
 881                         printf(".");
 882                         fflush(stdout);
 883                         rte_delay_ms(CHECK_INTERVAL);
 884                 }
 885
 886                 /* set the print_flag if all ports up or timeout */
 887                 if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
 888                         print_flag = 1;
 889                         printf("done\n");
 890                 }
 891         }
 892 }
 893
 894 int
 895 main(int argc, char **argv)
 896 {
 897         struct lcore_queue_conf *qconf;
 898         int ret;
 899         uint16_t nb_ports;
 900         uint16_t nb_ports_available;
 901         uint16_t portid, last_port;
 902         unsigned rx_lcore_id;
 903         unsigned nb_ports_in_mask = 0;
 904         unsigned i;
 905         uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;
 906
 907         /* Save cpu_affinity first, restore it in case it's floating process option */
 908         if (get_cpu_affinity() != 0)
 909                 rte_exit(EXIT_FAILURE, "get_cpu_affinity error\n");
 910
 911         /* Also tries to set cpu affinity to detect whether  it will fail in child process */
 912         if(clear_cpu_affinity() != 0)
 913                 rte_exit(EXIT_FAILURE, "clear_cpu_affinity error\n");
 914
 915         /* init EAL */
 916         ret = rte_eal_init(argc, argv);
 917         if (ret < 0)
 918                 rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
 919         argc -= ret;
 920         argv += ret;
 921
 922         /* parse application arguments (after the EAL ones) */
 923         ret = l2fwd_parse_args(argc, argv);
 924         if (ret < 0)
 925                 rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");
 926
 927         /*flib init */
 928         if (flib_init() != 0)
 929                 rte_exit(EXIT_FAILURE, "flib init error");
 930
 931         /**
 932           * Allocated structures that slave lcore would change. For those that slaves are
 933           * read only, needn't use malloc to share and global or static variables is ok since
 934           * slave inherit all the knowledge that master initialized.
 935           **/
 936         if (l2fwd_malloc_shared_struct() != 0)
 937                 rte_exit(EXIT_FAILURE, "malloc mem failed\n");
 938
 939         /* Initialize lcore_resource structures */
 940         memset(lcore_resource, 0, sizeof(lcore_resource));
 941         for (i = 0; i < RTE_MAX_LCORE; i++)
 942                 lcore_resource[i].lcore_id = i;
 943
 944         nb_ports = rte_eth_dev_count();
 945         if (nb_ports == 0)
 946                 rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
 947
 948         /* create the mbuf pool */
 949         for (portid = 0; portid < nb_ports; portid++) {
 950                 /* skip ports that are not enabled */
 951                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
 952                         continue;
 953                 char buf_name[RTE_MEMPOOL_NAMESIZE];
 954                 snprintf(buf_name, RTE_MEMPOOL_NAMESIZE, MBUF_NAME, portid);
 955                 l2fwd_pktmbuf_pool[portid] =
 956                         rte_pktmbuf_pool_create(buf_name, NB_MBUF, 32,
 957                                 0, MBUF_DATA_SIZE, rte_socket_id());
 958                 if (l2fwd_pktmbuf_pool[portid] == NULL)
 959                         rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
 960
 961                 printf("Create mbuf %s\n", buf_name);
 962         }
 963
 964         /* reset l2fwd_dst_ports */
 965         for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
 966                 l2fwd_dst_ports[portid] = 0;
 967         last_port = 0;
 968
 969         /*
 970          * Each logical core is assigned a dedicated TX queue on each port.
 971          */
 972         for (portid = 0; portid < nb_ports; portid++) {
 973                 /* skip ports that are not enabled */
 974                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
 975                         continue;
 976
 977                 if (nb_ports_in_mask % 2) {
 978                         l2fwd_dst_ports[portid] = last_port;
 979                         l2fwd_dst_ports[last_port] = portid;
 980                 }
 981                 else
 982                         last_port = portid;
 983
 984                 nb_ports_in_mask++;
 985         }
 986         if (nb_ports_in_mask % 2) {
 987                 printf("Notice: odd number of ports in portmask.\n");
 988                 l2fwd_dst_ports[last_port] = last_port;
 989         }
 990
 991         rx_lcore_id = 0;
 992         qconf = NULL;
 993
 994         /* Initialize the port/queue configuration of each logical core */
 995         for (portid = 0; portid < nb_ports; portid++) {
 996                 struct lcore_resource_struct *res;
 997                 /* skip ports that are not enabled */
 998                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
 999                         continue;
1000
1001                 /* get the lcore_id for this port */
1002                 /* skip master lcore */
1003                 while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
1004                            rte_get_master_lcore() == rx_lcore_id ||
1005                        lcore_queue_conf[rx_lcore_id].n_rx_port ==
1006                        l2fwd_rx_queue_per_lcore) {
1007
1008                         rx_lcore_id++;
1009                         if (rx_lcore_id >= RTE_MAX_LCORE)
1010                                 rte_exit(EXIT_FAILURE, "Not enough cores\n");
1011                 }
1012
1013                 if (qconf != &lcore_queue_conf[rx_lcore_id])
1014                         /* Assigned a new logical core in the loop above. */
1015                         qconf = &lcore_queue_conf[rx_lcore_id];
1016
1017                 qconf->rx_port_list[qconf->n_rx_port] = portid;
1018                 qconf->n_rx_port++;
1019
1020                 /* Save the port resource info into lcore_resource strucutres */
1021                 res = &lcore_resource[rx_lcore_id];
1022                 res->enabled = 1;
1023                 res->port[res->port_num++] = portid;
1024
1025                 printf("Lcore %u: RX port %u\n", rx_lcore_id, (unsigned) portid);
1026         }
1027
1028         nb_ports_available = nb_ports;
1029
1030         /* Initialise each port */
1031         for (portid = 0; portid < nb_ports; portid++) {
1032                 struct rte_eth_rxconf rxq_conf;
1033                 struct rte_eth_txconf txq_conf;
1034                 struct rte_eth_conf local_port_conf = port_conf;
1035
1036                 /* skip ports that are not enabled */
1037                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
1038                         printf("Skipping disabled port %u\n", (unsigned) portid);
1039                         nb_ports_available--;
1040                         continue;
1041                 }
1042                 /* init port */
1043                 printf("Initializing port %u... ", (unsigned) portid);
1044                 fflush(stdout);
1045                 rte_eth_dev_info_get(portid, &dev_info);
1046                 if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
1047                         local_port_conf.txmode.offloads |=
1048                                 DEV_TX_OFFLOAD_MBUF_FAST_FREE;
1049                 ret = rte_eth_dev_configure(portid, 1, 1, &local_port_conf);
1050                 if (ret < 0)
1051                         rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
1052                                   ret, (unsigned) portid);
1053
1054                 ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd,
1055                                                        &nb_txd);
1056                 if (ret < 0)
1057                         rte_exit(EXIT_FAILURE,
1058                                  "rte_eth_dev_adjust_nb_rx_tx_desc: err=%d, port=%u\n",
1059                                  ret, (unsigned) portid);
1060
1061                 rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);
1062
1063                 /* init one RX queue */
1064                 fflush(stdout);
1065                 rxq_conf = dev_info.default_rxconf;
1066                 rxq_conf.offloads = local_port_conf.rxmode.offloads;
1067                 ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
1068                                              rte_eth_dev_socket_id(portid),
1069                                              &rxq_conf,
1070                                              l2fwd_pktmbuf_pool[portid]);
1071                 if (ret < 0)
1072                         rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
1073                                   ret, (unsigned) portid);
1074
1075                 /* init one TX queue on each port */
1076                 fflush(stdout);
1077                 txq_conf = dev_info.default_txconf;
1078                 txq_conf.txq_flags = ETH_TXQ_FLAGS_IGNORE;
1079                 txq_conf.tx_offloads = local_port_conf.txmode.offloads;
1080                 ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
1081                                 rte_eth_dev_socket_id(portid),
1082                                 &txq_conf);
1083                 if (ret < 0)
1084                         rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
1085                                 ret, (unsigned) portid);
1086
1087                 /* Initialize TX buffers */
1088                 tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
1089                                 RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
1090                                 rte_eth_dev_socket_id(portid));
1091                 if (tx_buffer[portid] == NULL)
1092                         rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
1093                                         (unsigned) portid);
1094
1095                 rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);
1096
1097                 ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
1098                                 rte_eth_tx_buffer_count_callback,
1099                                 &port_statistics[portid].dropped);
1100                 if (ret < 0)
1101                                 rte_exit(EXIT_FAILURE, "Cannot set error callback for "
1102                                                 "tx buffer on port %u\n", (unsigned) portid);
1103
1104                 /* Start device */
1105                 ret = rte_eth_dev_start(portid);
1106                 if (ret < 0)
1107                         rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
1108                                   ret, (unsigned) portid);
1109
1110                 printf("done: \n");
1111
1112                 rte_eth_promiscuous_enable(portid);
1113
1114                 printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
1115                                 (unsigned) portid,
1116                                 l2fwd_ports_eth_addr[portid].addr_bytes[0],
1117                                 l2fwd_ports_eth_addr[portid].addr_bytes[1],
1118                                 l2fwd_ports_eth_addr[portid].addr_bytes[2],
1119                                 l2fwd_ports_eth_addr[portid].addr_bytes[3],
1120                                 l2fwd_ports_eth_addr[portid].addr_bytes[4],
1121                                 l2fwd_ports_eth_addr[portid].addr_bytes[5]);
1122
1123                 /* initialize port stats */
1124                 //memset(&port_statistics, 0, sizeof(port_statistics));
1125         }
1126
1127         if (!nb_ports_available) {
1128                 rte_exit(EXIT_FAILURE,
1129                         "All available ports are disabled. Please set portmask.\n");
1130         }
1131
1132         check_all_ports_link_status(nb_ports, l2fwd_enabled_port_mask);
1133
1134         /* Record pair lcore */
1135         /**
1136          * Since l2fwd example would create pair between different neighbour port, that's
1137          * port 0 receive and forward to port 1, the same to port 1, these 2 ports will have
1138          * dependency. If one port stopped working (killed, for example), the port need to
1139          * be stopped/started again. During the time, another port need to wait until stop/start
1140          * procedure completed. So, record the pair relationship for those lcores working
1141          * on ports.
1142          **/
1143         for (portid = 0; portid < nb_ports; portid++) {
1144                 uint32_t pair_port;
1145                 unsigned lcore = 0, pair_lcore = 0;
1146                 unsigned j, find_lcore, find_pair_lcore;
1147                 /* skip ports that are not enabled */
1148                 if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
1149                         continue;
1150
1151                 /* Find pair ports' lcores */
1152                 find_lcore = find_pair_lcore = 0;
1153                 pair_port = l2fwd_dst_ports[portid];
1154                 for (i = 0; i < RTE_MAX_LCORE; i++) {
1155                         if (!rte_lcore_is_enabled(i))
1156                                 continue;
1157                         for (j = 0; j < lcore_queue_conf[i].n_rx_port;j++) {
1158                                 if (lcore_queue_conf[i].rx_port_list[j] == portid) {
1159                                         lcore = i;
1160                                         find_lcore = 1;
1161                                         break;
1162                                 }
1163                                 if (lcore_queue_conf[i].rx_port_list[j] == pair_port) {
1164                                         pair_lcore = i;
1165                                         find_pair_lcore = 1;
1166                                         break;
1167                                 }
1168                         }
1169                         if (find_lcore && find_pair_lcore)
1170                                 break;
1171                 }
1172                 if (!find_lcore || !find_pair_lcore)
1173                         rte_exit(EXIT_FAILURE, "Not find port=%d pair\n", portid);
1174
1175                 printf("lcore %u and %u paired\n", lcore, pair_lcore);
1176                 lcore_resource[lcore].pair_id = pair_lcore;
1177                 lcore_resource[pair_lcore].pair_id = lcore;
1178         }
1179
1180         /* Create message buffer for all master and slave */
1181         message_pool = rte_mempool_create("ms_msg_pool",
1182                            NB_CORE_MSGBUF * RTE_MAX_LCORE,
1183                            sizeof(enum l2fwd_cmd), NB_CORE_MSGBUF / 2,
1184                            0, NULL, NULL, NULL, NULL, rte_socket_id(), 0);
1185
1186         if (message_pool == NULL)
1187                 rte_exit(EXIT_FAILURE, "Create msg mempool failed\n");
1188
1189         /* Create ring for each master and slave pair, also register cb when slave leaves */
1190         for (i = 0; i < RTE_MAX_LCORE; i++) {
1191                 /**
1192                  * Only create ring and register slave_exit cb in case that core involved into
1193                  * packet forwarding
1194                  **/
1195                 if (lcore_resource[i].enabled) {
1196                         /* Create ring for master and slave communication */
1197                         ret = create_ms_ring(i);
1198                         if (ret != 0)
1199                                 rte_exit(EXIT_FAILURE, "Create ring for lcore=%u failed",
1200                                 i);
1201
1202                         if (flib_register_slave_exit_notify(i,
1203                                 slave_exit_cb) != 0)
1204                                 rte_exit(EXIT_FAILURE,
1205                                                 "Register master_trace_slave_exit failed");
1206                 }
1207         }
1208
1209         /* launch per-lcore init on every lcore except master */
1210         flib_mp_remote_launch(l2fwd_launch_one_lcore, NULL, SKIP_MASTER);
1211
1212         /* print statistics 10 second */
1213         prev_tsc = cur_tsc = rte_rdtsc();
1214         timer_tsc = 0;
1215         while (1) {
1216                 sleep(1);
1217                 cur_tsc = rte_rdtsc();
1218                 diff_tsc = cur_tsc - prev_tsc;
1219                 /* if timer is enabled */
1220                 if (timer_period > 0) {
1221
1222                         /* advance the timer */
1223                         timer_tsc += diff_tsc;
1224
1225                         /* if timer has reached its timeout */
1226                         if (unlikely(timer_tsc >= (uint64_t) timer_period)) {
1227
1228                                 print_stats();
1229                                 /* reset the timer */
1230                                 timer_tsc = 0;
1231                         }
1232                 }
1233
1234                 prev_tsc = cur_tsc;
1235
1236                 /* Check any slave need restart or recreate */
1237                 rte_spinlock_lock(&res_lock);
1238                 for (i = 0; i < RTE_MAX_LCORE; i++) {
1239                         struct lcore_resource_struct *res  = &lcore_resource[i];
1240                         struct lcore_resource_struct *pair = &lcore_resource[res->pair_id];
1241
1242                         /* If find slave exited, try to reset pair */
1243                         if (res->enabled && res->flags && pair->enabled) {
1244                                 if (!pair->flags) {
1245                                         master_sendcmd_with_ack(pair->lcore_id, CMD_STOP);
1246                                         rte_spinlock_unlock(&res_lock);
1247                                         sleep(1);
1248                                         rte_spinlock_lock(&res_lock);
1249                                         if (pair->flags)
1250                                                 continue;
1251                                 }
1252                                 if (reset_pair(res->lcore_id, pair->lcore_id) != 0)
1253                                         rte_exit(EXIT_FAILURE, "failed to reset slave");
1254                                 res->flags  = 0;
1255                                 pair->flags = 0;
1256                         }
1257                 }
1258                 rte_spinlock_unlock(&res_lock);
1259         }
1260
1261 }