examples/multi_process/l2fwd_fork/main.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2016 Intel Corporation
 */
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <sched.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <setjmp.h>
#include <stdarg.h>
#include <ctype.h>
#include <errno.h>
#include <getopt.h>

#include <rte_common.h>
#include <rte_log.h>
#include <rte_memory.h>
#include <rte_memcpy.h>
#include <rte_eal.h>
#include <rte_launch.h>
#include <rte_atomic.h>
#include <rte_spinlock.h>
#include <rte_cycles.h>
#include <rte_prefetch.h>
#include <rte_lcore.h>
#include <rte_per_lcore.h>
#include <rte_branch_prediction.h>
#include <rte_interrupts.h>
#include <rte_random.h>
#include <rte_debug.h>
#include <rte_ether.h>
#include <rte_ethdev.h>
#include <rte_ring.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_malloc.h>

#include "flib.h"

#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
#define MBUF_NAME       "mbuf_pool_%d"
#define MBUF_DATA_SIZE  RTE_MBUF_DEFAULT_BUF_SIZE
#define NB_MBUF   8192
#define RING_MASTER_NAME        "l2fwd_ring_m2s_"
#define RING_SLAVE_NAME         "l2fwd_ring_s2m_"
#define MAX_NAME_LEN    32
/* RECREATE flag indicate needs initialize resource and launch slave_core again */
#define SLAVE_RECREATE_FLAG 0x1
/* RESTART flag indicate needs restart port and send START command again */
#define SLAVE_RESTART_FLAG 0x2
#define INVALID_MAPPING_ID      ((unsigned)LCORE_ID_ANY)
/* Maximum message buffer per slave */
#define NB_CORE_MSGBUF  32
enum l2fwd_cmd{
        CMD_START,
        CMD_STOP,
};

#define MAX_PKT_BURST 32
#define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */

/*
 * Configurable number of RX/TX ring descriptors
 */
#define RTE_TEST_RX_DESC_DEFAULT 1024
#define RTE_TEST_TX_DESC_DEFAULT 1024
static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT;
static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT;

/* ethernet addresses of ports */
static struct ether_addr l2fwd_ports_eth_addr[RTE_MAX_ETHPORTS];

/* mask of enabled ports */
static uint32_t l2fwd_enabled_port_mask = 0;

/* list of enabled ports */
static uint32_t l2fwd_dst_ports[RTE_MAX_ETHPORTS];

static unsigned int l2fwd_rx_queue_per_lcore = 1;

struct mbuf_table {
        unsigned len;
        struct rte_mbuf *m_table[MAX_PKT_BURST];
};

#define MAX_RX_QUEUE_PER_LCORE 16
#define MAX_TX_QUEUE_PER_PORT 16
struct lcore_queue_conf {
        unsigned n_rx_port;
        unsigned rx_port_list[MAX_RX_QUEUE_PER_LCORE];
} __rte_cache_aligned;
struct lcore_queue_conf lcore_queue_conf[RTE_MAX_LCORE];

struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];

struct lcore_resource_struct {
        int enabled;    /* Only set in case this lcore involved into packet forwarding */
        int flags;          /* Set only slave need to restart or recreate */
        unsigned lcore_id;  /*  lcore ID */
        unsigned pair_id;       /* dependency lcore ID on port */
        char ring_name[2][MAX_NAME_LEN];
        /* ring[0] for master send cmd, slave read */
        /* ring[1] for slave send ack, master read */
        struct rte_ring *ring[2];
        int port_num;                                   /* Total port numbers */
        /* Port id for that lcore to receive packets */
        uint16_t port[RTE_MAX_ETHPORTS];
}__attribute__((packed)) __rte_cache_aligned;

static struct lcore_resource_struct lcore_resource[RTE_MAX_LCORE];
static struct rte_mempool *message_pool;
static rte_spinlock_t res_lock = RTE_SPINLOCK_INITIALIZER;
/* use floating processes */
static int float_proc = 0;
/* Save original cpu affinity */
struct cpu_aff_arg{
        cpu_set_t set;
        size_t size;
}cpu_aff;

static const struct rte_eth_conf port_conf = {
        .rxmode = {
                .split_hdr_size = 0,
                .ignore_offload_bitfield = 1,
                .offloads = DEV_RX_OFFLOAD_CRC_STRIP,
        },
        .txmode = {
                .mq_mode = ETH_MQ_TX_NONE,
        },
};

static struct rte_mempool * l2fwd_pktmbuf_pool[RTE_MAX_ETHPORTS];

/* Per-port statistics struct */
struct l2fwd_port_statistics {
        uint64_t tx;
        uint64_t rx;
        uint64_t dropped;
} __rte_cache_aligned;
struct l2fwd_port_statistics *port_statistics;
unsigned *mapping_id;

/* A tsc-based timer responsible for triggering statistics printout */
#define TIMER_MILLISECOND 2000000ULL /* around 1ms at 2 Ghz */
#define MAX_TIMER_PERIOD 86400 /* 1 day max */
static int64_t timer_period = 10 * TIMER_MILLISECOND * 1000; /* default period is 10 seconds */

static int l2fwd_launch_one_lcore(void *dummy);

/* Print out statistics on packets dropped */
static void
print_stats(void)
{
        uint64_t total_packets_dropped, total_packets_tx, total_packets_rx;
        unsigned portid;

        total_packets_dropped = 0;
        total_packets_tx = 0;
        total_packets_rx = 0;

        const char clr[] = { 27, '[', '2', 'J', '\0' };
        const char topLeft[] = { 27, '[', '1', ';', '1', 'H','\0' };

                /* Clear screen and move to top left */
        printf("%s%s", clr, topLeft);

        printf("\nPort statistics ====================================");

        for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++) {
                /* skip disabled ports */
                if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
                        continue;
                printf("\nStatistics for port %u ------------------------------"
                           "\nPackets sent: %24"PRIu64
                           "\nPackets received: %20"PRIu64
                           "\nPackets dropped: %21"PRIu64,
                           portid,
                           port_statistics[portid].tx,
                           port_statistics[portid].rx,
                           port_statistics[portid].dropped);

                total_packets_dropped += port_statistics[portid].dropped;
                total_packets_tx += port_statistics[portid].tx;
                total_packets_rx += port_statistics[portid].rx;
        }
        printf("\nAggregate statistics ==============================="
                   "\nTotal packets sent: %18"PRIu64
                   "\nTotal packets received: %14"PRIu64
                   "\nTotal packets dropped: %15"PRIu64,
                   total_packets_tx,
                   total_packets_rx,
                   total_packets_dropped);
        printf("\n====================================================\n");
}

static int
clear_cpu_affinity(void)
{
        int s;

        s = sched_setaffinity(0, cpu_aff.size, &cpu_aff.set);
        if (s != 0) {
                printf("sched_setaffinity failed:%s\n", strerror(errno));
                return -1;
        }

        return 0;
}

static int
get_cpu_affinity(void)
{
        int s;

        cpu_aff.size = sizeof(cpu_set_t);
        CPU_ZERO(&cpu_aff.set);

        s = sched_getaffinity(0, cpu_aff.size, &cpu_aff.set);
        if (s != 0) {
                printf("sched_getaffinity failed:%s\n", strerror(errno));
                return -1;
        }

        return 0;
}

static struct rte_ring *
create_ring(const char *name, unsigned count,
                                        int socket_id,unsigned flags)
{
        struct rte_ring *ring;

        if (name == NULL)
                return NULL;

        /* If already create, just attached it */
        if (likely((ring = rte_ring_lookup(name)) != NULL))
                return ring;

        /* First call it, create one */
        return rte_ring_create(name, count, socket_id, flags);
}

/* Malloc with rte_malloc on structures that shared by master and slave */
static int
l2fwd_malloc_shared_struct(void)
{
        port_statistics = rte_zmalloc("port_stat",
                                                sizeof(struct l2fwd_port_statistics) * RTE_MAX_ETHPORTS,
                                                0);
        if (port_statistics == NULL)
                return -1;

        /* allocate  mapping_id array */
        if (float_proc) {
                int i;
                mapping_id = rte_malloc("mapping_id", sizeof(unsigned) * RTE_MAX_LCORE,
                                                                0);

                if (mapping_id == NULL)
                        return -1;

                for (i = 0 ;i < RTE_MAX_LCORE; i++)
                        mapping_id[i] = INVALID_MAPPING_ID;
        }
        return 0;
}

/* Create ring which used for communicate among master and slave */
static int
create_ms_ring(unsigned slaveid)
{
        unsigned flag = RING_F_SP_ENQ | RING_F_SC_DEQ;
        struct lcore_resource_struct *res = &lcore_resource[slaveid];
        unsigned socketid = rte_socket_id();

        /* Always assume create ring on master socket_id */
        /* Default only create a ring size 32 */
        snprintf(res->ring_name[0], MAX_NAME_LEN, "%s%u",
                        RING_MASTER_NAME, slaveid);
        if ((res->ring[0] = create_ring(res->ring_name[0], NB_CORE_MSGBUF,
                                socketid, flag)) == NULL) {
                printf("Create m2s ring %s failed\n", res->ring_name[0]);
                return -1;
        }

        snprintf(res->ring_name[1], MAX_NAME_LEN, "%s%u",
                        RING_SLAVE_NAME, slaveid);
        if ((res->ring[1] = create_ring(res->ring_name[1], NB_CORE_MSGBUF,
                socketid, flag)) == NULL) {
                printf("Create s2m ring %s failed\n", res->ring_name[1]);
                return -1;
        }

        return 0;
}

/* send command to pair in paired master and slave ring */
static inline int
sendcmd(unsigned slaveid, enum l2fwd_cmd cmd, int is_master)
{
        struct lcore_resource_struct *res = &lcore_resource[slaveid];
        void *msg;
        int fd = !is_master;

        /* Only check master, it must be enabled and running if it is slave */
        if (is_master && !res->enabled)
                return -1;

        if (res->ring[fd] == NULL)
                return -1;

        if (rte_mempool_get(message_pool, &msg) < 0) {
                printf("Error to get message buffer\n");
                return -1;
        }

        *(enum l2fwd_cmd *)msg = cmd;

        if (rte_ring_enqueue(res->ring[fd], msg) != 0) {
                printf("Enqueue error\n");
                rte_mempool_put(message_pool, msg);
                return -1;
        }

        return 0;
}

/* Get command from pair in paired master and slave ring */
static inline int
getcmd(unsigned slaveid, enum l2fwd_cmd *cmd, int is_master)
{
        struct lcore_resource_struct *res = &lcore_resource[slaveid];
        void *msg;
        int fd = !!is_master;
        int ret;
        /* Only check master, it must be enabled and running if it is slave */
        if (is_master && (!res->enabled))
                return -1;

        if (res->ring[fd] == NULL)
                return -1;

        ret = rte_ring_dequeue(res->ring[fd], &msg);

        if (ret == 0) {
                *cmd = *(enum l2fwd_cmd *)msg;
                rte_mempool_put(message_pool, msg);
        }
        return ret;
}

/* Master send command to slave and wait until ack received or error met */
static int
master_sendcmd_with_ack(unsigned slaveid, enum l2fwd_cmd cmd)
{
        enum l2fwd_cmd ack_cmd;
        int ret = -1;

        if (sendcmd(slaveid, cmd, 1) != 0)
                rte_exit(EXIT_FAILURE, "Failed to send message\n");

        /* Get ack */
        while (1) {
                ret = getcmd(slaveid, &ack_cmd, 1);
                if (ret == 0 && cmd == ack_cmd)
                        break;

                /* If slave not running yet, return an error */
                if (flib_query_slave_status(slaveid) != ST_RUN) {
                        ret = -ENOENT;
                        break;
                }
        }

        return ret;
}

/* restart all port that assigned to that slave lcore */
static int
reset_slave_all_ports(unsigned slaveid)
{
        struct lcore_resource_struct *slave = &lcore_resource[slaveid];
        int i, ret = 0;

        /* stop/start port */
        for (i = 0; i < slave->port_num; i++) {
                char buf_name[RTE_MEMPOOL_NAMESIZE];
                struct rte_mempool *pool;
                printf("Stop port :%d\n", slave->port[i]);
                rte_eth_dev_stop(slave->port[i]);
                snprintf(buf_name, RTE_MEMPOOL_NAMESIZE, MBUF_NAME, slave->port[i]);
                pool = rte_mempool_lookup(buf_name);
                if (pool)
                        printf("Port %d mempool free object is %u(%u)\n", slave->port[i],
                                rte_mempool_avail_count(pool),
                                (unsigned int)NB_MBUF);
                else
                        printf("Can't find mempool %s\n", buf_name);

                printf("Start port :%d\n", slave->port[i]);
                ret = rte_eth_dev_start(slave->port[i]);
                if (ret != 0)
                        break;
        }
        return ret;
}

static int
reset_shared_structures(unsigned slaveid)
{
        int ret;
        /* Only port are shared resource here */
        ret = reset_slave_all_ports(slaveid);

        return ret;
}

static int
init_slave_res(unsigned slaveid)
{
        struct lcore_resource_struct *slave = &lcore_resource[slaveid];
        enum l2fwd_cmd cmd;

        if (!slave->enabled) {
                printf("Something wrong with lcore=%u enabled=%d\n",slaveid,
                        slave->enabled);
                return -1;
        }

        /* Initialize ring */
        if (create_ms_ring(slaveid) != 0)
                rte_exit(EXIT_FAILURE, "failed to create ring for slave %u\n",
                                slaveid);

        /* drain un-read buffer if have */
        while (getcmd(slaveid, &cmd, 1) == 0);
        while (getcmd(slaveid, &cmd, 0) == 0);

        return 0;
}

static int
recreate_one_slave(unsigned slaveid)
{
        int ret = 0;
        /* Re-initialize resource for stalled slave */
        if ((ret = init_slave_res(slaveid)) != 0) {
                printf("Init slave=%u failed\n", slaveid);
                return ret;
        }

        if ((ret = flib_remote_launch(l2fwd_launch_one_lcore, NULL, slaveid))
                != 0)
                printf("Launch slave %u failed\n", slaveid);

        return ret;
}

static void
remapping_slave_resource(unsigned slaveid, unsigned map_id)
{

        /* remapping lcore_resource */
        memcpy(&lcore_resource[map_id], &lcore_resource[slaveid],
                        sizeof(struct lcore_resource_struct));

        /* remapping lcore_queue_conf */
        memcpy(&lcore_queue_conf[map_id], &lcore_queue_conf[slaveid],
                        sizeof(struct lcore_queue_conf));
}

static int
reset_pair(unsigned slaveid, unsigned pairid)
{
        int ret;
        if ((ret = reset_shared_structures(slaveid)) != 0)
                goto back;

        if((ret = reset_shared_structures(pairid)) != 0)
                goto back;

        if (float_proc) {
                unsigned map_id = mapping_id[slaveid];

                if (map_id != INVALID_MAPPING_ID) {
                        printf("%u return mapping id %u\n", slaveid, map_id);
                        flib_free_lcore_id(map_id);
                        mapping_id[slaveid] = INVALID_MAPPING_ID;
                }

                map_id = mapping_id[pairid];
                if (map_id != INVALID_MAPPING_ID) {
                        printf("%u return mapping id %u\n", pairid, map_id);
                        flib_free_lcore_id(map_id);
                        mapping_id[pairid] = INVALID_MAPPING_ID;
                }
        }

        if((ret = recreate_one_slave(slaveid)) != 0)
                goto back;

        ret = recreate_one_slave(pairid);

back:
        return ret;
}

static void
slave_exit_cb(unsigned slaveid, __attribute__((unused))int stat)
{
        struct lcore_resource_struct *slave = &lcore_resource[slaveid];

        printf("Get slave %u leave info\n", slaveid);
        if (!slave->enabled) {
                printf("Lcore=%u not registered for it's exit\n", slaveid);
                return;
        }
        rte_spinlock_lock(&res_lock);

        /* Change the state and wait master to start them */
        slave->flags = SLAVE_RECREATE_FLAG;

        rte_spinlock_unlock(&res_lock);
}

static void
l2fwd_simple_forward(struct rte_mbuf *m, unsigned portid)
{
        struct ether_hdr *eth;
        void *tmp;
        unsigned dst_port;
        int sent;
        struct rte_eth_dev_tx_buffer *buffer;

        dst_port = l2fwd_dst_ports[portid];
        eth = rte_pktmbuf_mtod(m, struct ether_hdr *);

        /* 02:00:00:00:00:xx */
        tmp = &eth->d_addr.addr_bytes[0];
        *((uint64_t *)tmp) = 0x000000000002 + ((uint64_t)dst_port << 40);

        /* src addr */
        ether_addr_copy(&l2fwd_ports_eth_addr[dst_port], &eth->s_addr);

        buffer = tx_buffer[dst_port];
        sent = rte_eth_tx_buffer(dst_port, 0, buffer, m);
        if (sent)
                port_statistics[dst_port].tx += sent;
}

/* main processing loop */
static void
l2fwd_main_loop(void)
{
        struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
        struct rte_mbuf *m;
        int sent;
        unsigned lcore_id;
        uint64_t prev_tsc, diff_tsc, cur_tsc;
        unsigned i, j, portid, nb_rx;
        struct lcore_queue_conf *qconf;
        const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1) / US_PER_S *
                        BURST_TX_DRAIN_US;
        struct rte_eth_dev_tx_buffer *buffer;

        prev_tsc = 0;

        lcore_id = rte_lcore_id();

        qconf = &lcore_queue_conf[lcore_id];

        if (qconf->n_rx_port == 0) {
                RTE_LOG(INFO, L2FWD, "lcore %u has nothing to do\n", lcore_id);
                return;
        }

        RTE_LOG(INFO, L2FWD, "entering main loop on lcore %u\n", lcore_id);

        for (i = 0; i < qconf->n_rx_port; i++) {
                portid = qconf->rx_port_list[i];
                RTE_LOG(INFO, L2FWD, " -- lcoreid=%u portid=%u\n", lcore_id,
                        portid);
        }

        while (1) {
                enum l2fwd_cmd cmd;
                cur_tsc = rte_rdtsc();

                if (unlikely(getcmd(lcore_id, &cmd, 0) == 0)) {
                        sendcmd(lcore_id, cmd, 0);

                        /* If get stop command, stop forwarding and exit */
                        if (cmd == CMD_STOP) {
                                return;
                        }
                }

                /*
                 * TX burst queue drain
                 */
                diff_tsc = cur_tsc - prev_tsc;
                if (unlikely(diff_tsc > drain_tsc)) {

                        for (i = 0; i < qconf->n_rx_port; i++) {

                                portid = l2fwd_dst_ports[qconf->rx_port_list[i]];
                                buffer = tx_buffer[portid];

                                sent = rte_eth_tx_buffer_flush(portid, 0, buffer);
                                if (sent)
                                        port_statistics[portid].tx += sent;

                        }

                        prev_tsc = cur_tsc;
                }

                /*
                 * Read packet from RX queues
                 */
                for (i = 0; i < qconf->n_rx_port; i++) {

                        portid = qconf->rx_port_list[i];
                        nb_rx = rte_eth_rx_burst((uint8_t) portid, 0,
                                                 pkts_burst, MAX_PKT_BURST);

                        port_statistics[portid].rx += nb_rx;

                        for (j = 0; j < nb_rx; j++) {
                                m = pkts_burst[j];
                                rte_prefetch0(rte_pktmbuf_mtod(m, void *));
                                l2fwd_simple_forward(m, portid);
                        }
                }
        }
}

static int
l2fwd_launch_one_lcore(__attribute__((unused)) void *dummy)
{
        unsigned lcore_id = rte_lcore_id();

        if (float_proc) {
                unsigned flcore_id;

                /* Change it to floating process, also change it's lcore_id */
                clear_cpu_affinity();
                RTE_PER_LCORE(_lcore_id) = 0;
                /* Get a lcore_id */
                if (flib_assign_lcore_id() < 0 ) {
                        printf("flib_assign_lcore_id failed\n");
                        return -1;
                }
                flcore_id = rte_lcore_id();
                /* Set mapping id, so master can return it after slave exited */
                mapping_id[lcore_id] = flcore_id;
                printf("Org lcore_id = %u, cur lcore_id = %u\n",
                                lcore_id, flcore_id);
                remapping_slave_resource(lcore_id, flcore_id);
        }

        l2fwd_main_loop();

        /* return lcore_id before return */
        if (float_proc) {
                flib_free_lcore_id(rte_lcore_id());
                mapping_id[lcore_id] = INVALID_MAPPING_ID;
        }
        return 0;
}

/* display usage */
static void
l2fwd_usage(const char *prgname)
{
        printf("%s [EAL options] -- -p PORTMASK -s COREMASK [-q NQ] -f\n"
               "  -p PORTMASK: hexadecimal bitmask of ports to configure\n"
               "  -q NQ: number of queue (=ports) per lcore (default is 1)\n"
               "  -f use floating process which won't bind to any core to run\n"
                   "  -T PERIOD: statistics will be refreshed each PERIOD seconds (0 to disable, 10 default, 86400 maximum)\n",
               prgname);
}

static int
l2fwd_parse_portmask(const char *portmask)
{
        char *end = NULL;
        unsigned long pm;

        /* parse hexadecimal string */
        pm = strtoul(portmask, &end, 16);
        if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
                return -1;

        if (pm == 0)
                return -1;

        return pm;
}

static unsigned int
l2fwd_parse_nqueue(const char *q_arg)
{
        char *end = NULL;
        unsigned long n;

        /* parse hexadecimal string */
        n = strtoul(q_arg, &end, 10);
        if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
                return 0;
        if (n == 0)
                return 0;
        if (n >= MAX_RX_QUEUE_PER_LCORE)
                return 0;

        return n;
}

static int
l2fwd_parse_timer_period(const char *q_arg)
{
        char *end = NULL;
        int n;

        /* parse number string */
        n = strtol(q_arg, &end, 10);
        if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
                return -1;
        if (n >= MAX_TIMER_PERIOD)
                return -1;

        return n;
}

/* Parse the argument given in the command line of the application */
static int
l2fwd_parse_args(int argc, char **argv)
{
        int opt, ret;
        char **argvopt;
        int option_index;
        char *prgname = argv[0];
        static struct option lgopts[] = {
                {NULL, 0, 0, 0}
        };
        int has_pmask = 0;

        argvopt = argv;

        while ((opt = getopt_long(argc, argvopt, "p:q:T:f",
                                  lgopts, &option_index)) != EOF) {

                switch (opt) {
                /* portmask */
                case 'p':
                        l2fwd_enabled_port_mask = l2fwd_parse_portmask(optarg);
                        if (l2fwd_enabled_port_mask == 0) {
                                printf("invalid portmask\n");
                                l2fwd_usage(prgname);
                                return -1;
                        }
                        has_pmask = 1;
                        break;

                /* nqueue */
                case 'q':
                        l2fwd_rx_queue_per_lcore = l2fwd_parse_nqueue(optarg);
                        if (l2fwd_rx_queue_per_lcore == 0) {
                                printf("invalid queue number\n");
                                l2fwd_usage(prgname);
                                return -1;
                        }
                        break;

                /* timer period */
                case 'T':
                        timer_period = l2fwd_parse_timer_period(optarg) * 1000 * TIMER_MILLISECOND;
                        if (timer_period < 0) {
                                printf("invalid timer period\n");
                                l2fwd_usage(prgname);
                                return -1;
                        }
                        break;

                /* use floating process */
                case 'f':
                        float_proc = 1;
                        break;

                /* long options */
                case 0:
                        l2fwd_usage(prgname);
                        return -1;

                default:
                        l2fwd_usage(prgname);
                        return -1;
                }
        }

        if (optind >= 0)
                argv[optind-1] = prgname;

        if (!has_pmask) {
                l2fwd_usage(prgname);
                return -1;
        }
        ret = optind-1;
        optind = 1; /* reset getopt lib */
        return ret;
}

/* Check the link status of all ports in up to 9s, and print them finally */
static void
check_all_ports_link_status(uint32_t port_mask)
{
#define CHECK_INTERVAL 100 /* 100ms */
#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
        uint16_t portid;
        uint8_t count, all_ports_up, print_flag = 0;
        struct rte_eth_link link;

        printf("\nChecking link status");
        fflush(stdout);
        for (count = 0; count <= MAX_CHECK_TIME; count++) {
                all_ports_up = 1;
                RTE_ETH_FOREACH_DEV(portid) {
                        if ((port_mask & (1 << portid)) == 0)
                                continue;
                        memset(&link, 0, sizeof(link));
                        rte_eth_link_get_nowait(portid, &link);
                        /* print link status if flag set */
                        if (print_flag == 1) {
                                if (link.link_status)
                                        printf(
                                        "Port%d Link Up- speed %u Mbps- %s\n",
                                        portid, link.link_speed,
                                (link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
                                        ("full-duplex") : ("half-duplex\n"));
                                else
                                        printf("Port %d Link Down\n", portid);
                                continue;
                        }
                        /* clear all_ports_up flag if any link down */
                        if (link.link_status == ETH_LINK_DOWN) {
                                all_ports_up = 0;
                                break;
                        }
                }
                /* after finally printing all link status, get out */
                if (print_flag == 1)
                        break;

                if (all_ports_up == 0) {
                        printf(".");
                        fflush(stdout);
                        rte_delay_ms(CHECK_INTERVAL);
                }

                /* set the print_flag if all ports up or timeout */
                if (all_ports_up == 1 || count == (MAX_CHECK_TIME - 1)) {
                        print_flag = 1;
                        printf("done\n");
                }
        }
}

int
main(int argc, char **argv)
{
        struct lcore_queue_conf *qconf;
        int ret;
        uint16_t nb_ports;
        uint16_t nb_ports_available = 0;
        uint16_t portid, last_port;
        unsigned rx_lcore_id;
        unsigned nb_ports_in_mask = 0;
        unsigned i;
        uint64_t prev_tsc, diff_tsc, cur_tsc, timer_tsc;

        /* Save cpu_affinity first, restore it in case it's floating process option */
        if (get_cpu_affinity() != 0)
                rte_exit(EXIT_FAILURE, "get_cpu_affinity error\n");

        /* Also tries to set cpu affinity to detect whether  it will fail in child process */
        if(clear_cpu_affinity() != 0)
                rte_exit(EXIT_FAILURE, "clear_cpu_affinity error\n");

        /* init EAL */
        ret = rte_eal_init(argc, argv);
        if (ret < 0)
                rte_exit(EXIT_FAILURE, "Invalid EAL arguments\n");
        argc -= ret;
        argv += ret;

        /* parse application arguments (after the EAL ones) */
        ret = l2fwd_parse_args(argc, argv);
        if (ret < 0)
                rte_exit(EXIT_FAILURE, "Invalid L2FWD arguments\n");

        /*flib init */
        if (flib_init() != 0)
                rte_exit(EXIT_FAILURE, "flib init error");

        if (l2fwd_malloc_shared_struct() != 0)
                rte_exit(EXIT_FAILURE, "malloc mem failed\n");

        /* Initialize lcore_resource structures */
        memset(lcore_resource, 0, sizeof(lcore_resource));
        for (i = 0; i < RTE_MAX_LCORE; i++)
                lcore_resource[i].lcore_id = i;

        nb_ports = rte_eth_dev_count_avail();
        if (nb_ports == 0)
                rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");

        /* create the mbuf pool */
        RTE_ETH_FOREACH_DEV(portid) {
                /* skip ports that are not enabled */
                if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
                        continue;
                char buf_name[RTE_MEMPOOL_NAMESIZE];
                snprintf(buf_name, RTE_MEMPOOL_NAMESIZE, MBUF_NAME, portid);
                l2fwd_pktmbuf_pool[portid] =
                        rte_pktmbuf_pool_create(buf_name, NB_MBUF, 32,
                                0, MBUF_DATA_SIZE, rte_socket_id());
                if (l2fwd_pktmbuf_pool[portid] == NULL)
                        rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");

                printf("Create mbuf %s\n", buf_name);
        }

        /* reset l2fwd_dst_ports */
        for (portid = 0; portid < RTE_MAX_ETHPORTS; portid++)
                l2fwd_dst_ports[portid] = 0;
        last_port = 0;

        /*
         * Each logical core is assigned a dedicated TX queue on each port.
         */
        RTE_ETH_FOREACH_DEV(portid) {
                /* skip ports that are not enabled */
                if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
                        continue;

                if (nb_ports_in_mask % 2) {
                        l2fwd_dst_ports[portid] = last_port;
                        l2fwd_dst_ports[last_port] = portid;
                }
                else
                        last_port = portid;

                nb_ports_in_mask++;
        }
        if (nb_ports_in_mask % 2) {
                printf("Notice: odd number of ports in portmask.\n");
                l2fwd_dst_ports[last_port] = last_port;
        }

        rx_lcore_id = 0;
        qconf = NULL;

        /* Initialize the port/queue configuration of each logical core */
        RTE_ETH_FOREACH_DEV(portid) {
                struct lcore_resource_struct *res;
                /* skip ports that are not enabled */
                if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
                        continue;

                /* get the lcore_id for this port */
                /* skip master lcore */
                while (rte_lcore_is_enabled(rx_lcore_id) == 0 ||
                           rte_get_master_lcore() == rx_lcore_id ||
                       lcore_queue_conf[rx_lcore_id].n_rx_port ==
                       l2fwd_rx_queue_per_lcore) {

                        rx_lcore_id++;
                        if (rx_lcore_id >= RTE_MAX_LCORE)
                                rte_exit(EXIT_FAILURE, "Not enough cores\n");
                }

                if (qconf != &lcore_queue_conf[rx_lcore_id])
                        /* Assigned a new logical core in the loop above. */
                        qconf = &lcore_queue_conf[rx_lcore_id];

                qconf->rx_port_list[qconf->n_rx_port] = portid;
                qconf->n_rx_port++;

                /* Save the port resource info into lcore_resource strucutres */
                res = &lcore_resource[rx_lcore_id];
                res->enabled = 1;
                res->port[res->port_num++] = portid;

                printf("Lcore %u: RX port %u\n", rx_lcore_id, (unsigned) portid);
        }

        /* Initialise each port */
        RTE_ETH_FOREACH_DEV(portid) {
                struct rte_eth_rxconf rxq_conf;
                struct rte_eth_txconf txq_conf;
                struct rte_eth_conf local_port_conf = port_conf;

                /* skip ports that are not enabled */
                if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
                        printf("Skipping disabled port %u\n", (unsigned) portid);
                        continue;
                }
                nb_ports_available++;
                /* init port */
                printf("Initializing port %u... ", (unsigned) portid);
                fflush(stdout);
                rte_eth_dev_info_get(portid, &dev_info);
                if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_MBUF_FAST_FREE)
                        local_port_conf.txmode.offloads |=
                                DEV_TX_OFFLOAD_MBUF_FAST_FREE;
                ret = rte_eth_dev_configure(portid, 1, 1, &local_port_conf);
                if (ret < 0)
                        rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
                                  ret, (unsigned) portid);

                ret = rte_eth_dev_adjust_nb_rx_tx_desc(portid, &nb_rxd,
                                                       &nb_txd);
                if (ret < 0)
                        rte_exit(EXIT_FAILURE,
                                 "rte_eth_dev_adjust_nb_rx_tx_desc: err=%d, port=%u\n",
                                 ret, (unsigned) portid);

                rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);

                /* init one RX queue */
                fflush(stdout);
                rxq_conf = dev_info.default_rxconf;
                rxq_conf.offloads = local_port_conf.rxmode.offloads;
                ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
                                             rte_eth_dev_socket_id(portid),
                                             &rxq_conf,
                                             l2fwd_pktmbuf_pool[portid]);
                if (ret < 0)
                        rte_exit(EXIT_FAILURE, "rte_eth_rx_queue_setup:err=%d, port=%u\n",
                                  ret, (unsigned) portid);

                /* init one TX queue on each port */
                fflush(stdout);
                txq_conf = dev_info.default_txconf;
                txq_conf.txq_flags = ETH_TXQ_FLAGS_IGNORE;
                txq_conf.tx_offloads = local_port_conf.txmode.offloads;
                ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
                                rte_eth_dev_socket_id(portid),
                                &txq_conf);
                if (ret < 0)
                        rte_exit(EXIT_FAILURE, "rte_eth_tx_queue_setup:err=%d, port=%u\n",
                                ret, (unsigned) portid);

                /* Initialize TX buffers */
                tx_buffer[portid] = rte_zmalloc_socket("tx_buffer",
                                RTE_ETH_TX_BUFFER_SIZE(MAX_PKT_BURST), 0,
                                rte_eth_dev_socket_id(portid));
                if (tx_buffer[portid] == NULL)
                        rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
                                        (unsigned) portid);

                rte_eth_tx_buffer_init(tx_buffer[portid], MAX_PKT_BURST);

                ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[portid],
                                rte_eth_tx_buffer_count_callback,
                                &port_statistics[portid].dropped);
                if (ret < 0)
                                rte_exit(EXIT_FAILURE, "Cannot set error callback for "
                                                "tx buffer on port %u\n", (unsigned) portid);

                /* Start device */
                ret = rte_eth_dev_start(portid);
                if (ret < 0)
                        rte_exit(EXIT_FAILURE, "rte_eth_dev_start:err=%d, port=%u\n",
                                  ret, (unsigned) portid);

                printf("done: \n");

                rte_eth_promiscuous_enable(portid);

                printf("Port %u, MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n\n",
                                (unsigned) portid,
                                l2fwd_ports_eth_addr[portid].addr_bytes[0],
                                l2fwd_ports_eth_addr[portid].addr_bytes[1],
                                l2fwd_ports_eth_addr[portid].addr_bytes[2],
                                l2fwd_ports_eth_addr[portid].addr_bytes[3],
                                l2fwd_ports_eth_addr[portid].addr_bytes[4],
                                l2fwd_ports_eth_addr[portid].addr_bytes[5]);

                /* initialize port stats */
                //memset(&port_statistics, 0, sizeof(port_statistics));
        }

        if (!nb_ports_available) {
                rte_exit(EXIT_FAILURE,
                        "All available ports are disabled. Please set portmask.\n");
        }

        check_all_ports_link_status(l2fwd_enabled_port_mask);

        /* Record pair lcore */
        RTE_ETH_FOREACH_DEV(portid) {
                uint32_t pair_port;
                unsigned lcore = 0, pair_lcore = 0;
                unsigned j, find_lcore, find_pair_lcore;
                /* skip ports that are not enabled */
                if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
                        continue;

                /* Find pair ports' lcores */
                find_lcore = find_pair_lcore = 0;
                pair_port = l2fwd_dst_ports[portid];
                for (i = 0; i < RTE_MAX_LCORE; i++) {
                        if (!rte_lcore_is_enabled(i))
                                continue;
                        for (j = 0; j < lcore_queue_conf[i].n_rx_port;j++) {
                                if (lcore_queue_conf[i].rx_port_list[j] == portid) {
                                        lcore = i;
                                        find_lcore = 1;
                                        break;
                                }
                                if (lcore_queue_conf[i].rx_port_list[j] == pair_port) {
                                        pair_lcore = i;
                                        find_pair_lcore = 1;
                                        break;
                                }
                        }
                        if (find_lcore && find_pair_lcore)
                                break;
                }
                if (!find_lcore || !find_pair_lcore)
                        rte_exit(EXIT_FAILURE, "Not find port=%d pair\n", portid);

                printf("lcore %u and %u paired\n", lcore, pair_lcore);
                lcore_resource[lcore].pair_id = pair_lcore;
                lcore_resource[pair_lcore].pair_id = lcore;
        }

        /* Create message buffer for all master and slave */
        message_pool = rte_mempool_create("ms_msg_pool",
                           NB_CORE_MSGBUF * RTE_MAX_LCORE,
                           sizeof(enum l2fwd_cmd), NB_CORE_MSGBUF / 2,
                           0, NULL, NULL, NULL, NULL, rte_socket_id(), 0);

        if (message_pool == NULL)
                rte_exit(EXIT_FAILURE, "Create msg mempool failed\n");

        /* Create ring for each master and slave pair, also register cb when slave leaves */
        for (i = 0; i < RTE_MAX_LCORE; i++) {
                if (lcore_resource[i].enabled) {
                        /* Create ring for master and slave communication */
                        ret = create_ms_ring(i);
                        if (ret != 0)
                                rte_exit(EXIT_FAILURE, "Create ring for lcore=%u failed",
                                i);

                        if (flib_register_slave_exit_notify(i,
                                slave_exit_cb) != 0)
                                rte_exit(EXIT_FAILURE,
                                                "Register master_trace_slave_exit failed");
                }
        }

        /* launch per-lcore init on every lcore except master */
        flib_mp_remote_launch(l2fwd_launch_one_lcore, NULL, SKIP_MASTER);

        /* print statistics 10 second */
        prev_tsc = cur_tsc = rte_rdtsc();
        timer_tsc = 0;
        while (1) {
                sleep(1);
                cur_tsc = rte_rdtsc();
                diff_tsc = cur_tsc - prev_tsc;
                /* if timer is enabled */
                if (timer_period > 0) {

                        /* advance the timer */
                        timer_tsc += diff_tsc;

                        /* if timer has reached its timeout */
                        if (unlikely(timer_tsc >= (uint64_t) timer_period)) {

                                print_stats();
                                /* reset the timer */
                                timer_tsc = 0;
                        }
                }

                prev_tsc = cur_tsc;

                /* Check any slave need restart or recreate */
                rte_spinlock_lock(&res_lock);
                for (i = 0; i < RTE_MAX_LCORE; i++) {
                        struct lcore_resource_struct *res  = &lcore_resource[i];
                        struct lcore_resource_struct *pair = &lcore_resource[res->pair_id];

                        /* If find slave exited, try to reset pair */
                        if (res->enabled && res->flags && pair->enabled) {
                                if (!pair->flags) {
                                        master_sendcmd_with_ack(pair->lcore_id, CMD_STOP);
                                        rte_spinlock_unlock(&res_lock);
                                        sleep(1);
                                        rte_spinlock_lock(&res_lock);
                                        if (pair->flags)
                                                continue;
                                }
                                if (reset_pair(res->lcore_id, pair->lcore_id) != 0)
                                        rte_exit(EXIT_FAILURE, "failed to reset slave");
                                res->flags  = 0;
                                pair->flags = 0;
                        }
                }
                rte_spinlock_unlock(&res_lock);
        }

}