Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1288 insertions, 0 deletions

diff --git a/examples/multi_process/l2fwd_fork/main.c b/examples/multi_process/l2fwd_fork/main.c
new file mode 100644
index 00000000..2dc8b829
--- /dev/null
+++ b/examples/multi_process/l2fwd_fork/main.c
@@ -0,0 +1,1288 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#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_memzone.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.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_pci.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_SIZE	\
+(RTE_MBUF_DEFAULT_DATAROOM + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
+#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 128
+#define RTE_TEST_TX_DESC_DEFAULT 512
+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 */
+	uint8_t port[RTE_MAX_ETHPORTS]; /* Port id for that lcore to receive packets */
+}__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,
+		.header_split   = 0, /**< Header Split disabled */
+		.hw_ip_checksum = 0, /**< IP checksum offload disabled */
+		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
+		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
+		.hw_strip_crc   = 0, /**< CRC stripped by hardware */
+	},
+	.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;
+/**
+ * pointer to lcore ID mapping array, used to return lcore id in case slave
+ * process exited unexpectedly, use only floating process option applied
+ **/
+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;
+}
+
+/**
+ * This fnciton demonstrates the approach to create ring in first instance
+ * or re-attach an existed ring in later instance.
+ **/
+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_count(pool), (unsigned)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;
+}
+
+/**
+ * Call this function to re-create resource that needed for slave process that
+ * exited in last instance
+ **/
+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;
+}
+
+/**
+ * remapping resource belong to slave_id to new lcore that gets from flib_assign_lcore_id(),
+ * used only floating process option applied.
+ *
+ * @param slaveid
+ *   original lcore_id that apply for remapping
+ */
+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;
+
+			}
+		}
+
+		/*
+		 * 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 = 0; /* 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(uint8_t port_num, uint32_t port_mask)
+{
+#define CHECK_INTERVAL 100 /* 100ms */
+#define MAX_CHECK_TIME 90 /* 9s (90 * 100ms) in total */
+	uint8_t portid, 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;
+		for (portid = 0; portid < port_num; 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", (uint8_t)portid,
+						(unsigned)link.link_speed,
+				(link.link_duplex == ETH_LINK_FULL_DUPLEX) ?
+					("full-duplex") : ("half-duplex\n"));
+				else
+					printf("Port %d Link Down\n",
+						(uint8_t)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;
+	struct rte_eth_dev_info dev_info;
+	int ret;
+	uint8_t nb_ports;
+	uint8_t nb_ports_available;
+	uint8_t portid, last_port;
+	unsigned rx_lcore_id;
+	unsigned nb_ports_in_mask = 0;
+	unsigned i;
+	int flags = 0;
+	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");
+
+	/**
+	  * Allocated structures that slave lcore would change. For those that slaves are
+	  * read only, needn't use malloc to share and global or static variables is ok since
+	  * slave inherit all the knowledge that master initialized.
+	  **/
+	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();
+	if (nb_ports == 0)
+		rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+	if (nb_ports > RTE_MAX_ETHPORTS)
+		nb_ports = RTE_MAX_ETHPORTS;
+
+	/* create the mbuf pool */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0)
+			continue;
+		char buf_name[RTE_MEMPOOL_NAMESIZE];
+		flags = MEMPOOL_F_SP_PUT | MEMPOOL_F_SC_GET;
+		snprintf(buf_name, RTE_MEMPOOL_NAMESIZE, MBUF_NAME, portid);
+		l2fwd_pktmbuf_pool[portid] =
+			rte_mempool_create(buf_name, NB_MBUF,
+					   MBUF_SIZE, 32,
+					   sizeof(struct rte_pktmbuf_pool_private),
+					   rte_pktmbuf_pool_init, NULL,
+					   rte_pktmbuf_init, NULL,
+					   rte_socket_id(), flags);
+		if (l2fwd_pktmbuf_pool[portid] == NULL)
+			rte_exit(EXIT_FAILURE, "Cannot init 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.
+	 */
+	for (portid = 0; portid < nb_ports; 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++;
+
+		rte_eth_dev_info_get(portid, &dev_info);
+	}
+	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 */
+	for (portid = 0; portid < nb_ports; 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);
+	}
+
+	nb_ports_available = nb_ports;
+
+	/* Initialise each port */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((l2fwd_enabled_port_mask & (1 << portid)) == 0) {
+			printf("Skipping disabled port %u\n", (unsigned) portid);
+			nb_ports_available--;
+			continue;
+		}
+		/* init port */
+		printf("Initializing port %u... ", (unsigned) portid);
+		fflush(stdout);
+		ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
+		if (ret < 0)
+			rte_exit(EXIT_FAILURE, "Cannot configure device: err=%d, port=%u\n",
+				  ret, (unsigned) portid);
+
+		rte_eth_macaddr_get(portid,&l2fwd_ports_eth_addr[portid]);
+
+		/* init one RX queue */
+		fflush(stdout);
+		ret = rte_eth_rx_queue_setup(portid, 0, nb_rxd,
+					     rte_eth_dev_socket_id(portid),
+					     NULL,
+					     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);
+		ret = rte_eth_tx_queue_setup(portid, 0, nb_txd,
+				rte_eth_dev_socket_id(portid),
+				NULL);
+		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(nb_ports, l2fwd_enabled_port_mask);
+
+	/* Record pair lcore */
+	/**
+	 * Since l2fwd example would create pair between different neighbour port, that's
+	 * port 0 receive and forward to port 1, the same to port 1, these 2 ports will have
+	 * dependency. If one port stopped working (killed, for example), the port need to
+	 * be stopped/started again. During the time, another port need to wait until stop/start
+	 * procedure completed. So, record the pair relationship for those lcores working
+	 * on ports.
+	 **/
+	for (portid = 0; portid < nb_ports; 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,
+			   rte_pktmbuf_pool_init, NULL,
+			   rte_pktmbuf_init, 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++) {
+		/**
+		 * Only create ring and register slave_exit cb in case that core involved into
+		 * packet forwarding
+		 **/
+		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);
+	}
+
+}