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