aboutsummaryrefslogtreecommitdiffstats
path: root/examples/vmdq_dcb/main.c
blob: 35ffffadcb2a09bfbe2e1e6fbc7a3a898df68a0a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 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.
 */

#include <stdint.h>
#include <sys/queue.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <inttypes.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_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_log.h>
#include <rte_mempool.h>
#include <rte_mbuf.h>
#include <rte_memcpy.h>

/* basic constants used in application */
#define MAX_QUEUES 1024
/*
 * 1024 queues require to meet the needs of a large number of vmdq_pools.
 * (RX/TX_queue_nb * RX/TX_ring_descriptors_nb) per port.
 */
#define NUM_MBUFS_PER_PORT (MAX_QUEUES * RTE_MAX(RTE_TEST_RX_DESC_DEFAULT, \
						RTE_TEST_TX_DESC_DEFAULT))
#define MBUF_CACHE_SIZE 64

#define MAX_PKT_BURST 32

/*
 * Configurable number of RX/TX ring descriptors
 */
#define RTE_TEST_RX_DESC_DEFAULT 128
#define RTE_TEST_TX_DESC_DEFAULT 512

#define INVALID_PORT_ID 0xFF

/* mask of enabled ports */
static uint32_t enabled_port_mask;
static uint8_t ports[RTE_MAX_ETHPORTS];
static unsigned num_ports;

/* number of pools (if user does not specify any, 32 by default */
static enum rte_eth_nb_pools num_pools = ETH_32_POOLS;
static enum rte_eth_nb_tcs   num_tcs   = ETH_4_TCS;
static uint16_t num_queues, num_vmdq_queues;
static uint16_t vmdq_pool_base, vmdq_queue_base;
static uint8_t rss_enable;

/* empty vmdq+dcb configuration structure. Filled in programatically */
static const struct rte_eth_conf vmdq_dcb_conf_default = {
	.rxmode = {
		.mq_mode        = ETH_MQ_RX_VMDQ_DCB,
		.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 */
	},
	.txmode = {
		.mq_mode = ETH_MQ_TX_VMDQ_DCB,
	},
	/*
	 * should be overridden separately in code with
	 * appropriate values
	 */
	.rx_adv_conf = {
		.vmdq_dcb_conf = {
			.nb_queue_pools = ETH_32_POOLS,
			.enable_default_pool = 0,
			.default_pool = 0,
			.nb_pool_maps = 0,
			.pool_map = {{0, 0},},
			.dcb_tc = {0},
		},
		.dcb_rx_conf = {
				.nb_tcs = ETH_4_TCS,
				/** Traffic class each UP mapped to. */
				.dcb_tc = {0},
		},
		.vmdq_rx_conf = {
			.nb_queue_pools = ETH_32_POOLS,
			.enable_default_pool = 0,
			.default_pool = 0,
			.nb_pool_maps = 0,
			.pool_map = {{0, 0},},
		},
	},
	.tx_adv_conf = {
		.vmdq_dcb_tx_conf = {
			.nb_queue_pools = ETH_32_POOLS,
			.dcb_tc = {0},
		},
	},
};

/* array used for printing out statistics */
volatile unsigned long rxPackets[MAX_QUEUES] = {0};

const uint16_t vlan_tags[] = {
	0,  1,  2,  3,  4,  5,  6,  7,
	8,  9, 10, 11,	12, 13, 14, 15,
	16, 17, 18, 19, 20, 21, 22, 23,
	24, 25, 26, 27, 28, 29, 30, 31
};

const uint16_t num_vlans = RTE_DIM(vlan_tags);
/* pool mac addr template, pool mac addr is like: 52 54 00 12 port# pool# */
static struct ether_addr pool_addr_template = {
	.addr_bytes = {0x52, 0x54, 0x00, 0x12, 0x00, 0x00}
};

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

/* Builds up the correct configuration for vmdq+dcb based on the vlan tags array
 * given above, and the number of traffic classes available for use. */
static inline int
get_eth_conf(struct rte_eth_conf *eth_conf)
{
	struct rte_eth_vmdq_dcb_conf conf;
	struct rte_eth_vmdq_rx_conf  vmdq_conf;
	struct rte_eth_dcb_rx_conf   dcb_conf;
	struct rte_eth_vmdq_dcb_tx_conf tx_conf;
	uint8_t i;

	conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
	vmdq_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
	tx_conf.nb_queue_pools = (enum rte_eth_nb_pools)num_pools;
	conf.nb_pool_maps = num_pools;
	vmdq_conf.nb_pool_maps = num_pools;
	conf.enable_default_pool = 0;
	vmdq_conf.enable_default_pool = 0;
	conf.default_pool = 0; /* set explicit value, even if not used */
	vmdq_conf.default_pool = 0;

	for (i = 0; i < conf.nb_pool_maps; i++) {
		conf.pool_map[i].vlan_id = vlan_tags[i];
		vmdq_conf.pool_map[i].vlan_id = vlan_tags[i];
		conf.pool_map[i].pools = 1UL << i;
		vmdq_conf.pool_map[i].pools = 1UL << i;
	}
	for (i = 0; i < ETH_DCB_NUM_USER_PRIORITIES; i++){
		conf.dcb_tc[i] = i % num_tcs;
		dcb_conf.dcb_tc[i] = i % num_tcs;
		tx_conf.dcb_tc[i] = i % num_tcs;
	}
	dcb_conf.nb_tcs = (enum rte_eth_nb_tcs)num_tcs;
	(void)(rte_memcpy(eth_conf, &vmdq_dcb_conf_default, sizeof(*eth_conf)));
	(void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_dcb_conf, &conf,
			  sizeof(conf)));
	(void)(rte_memcpy(&eth_conf->rx_adv_conf.dcb_rx_conf, &dcb_conf,
			  sizeof(dcb_conf)));
	(void)(rte_memcpy(&eth_conf->rx_adv_conf.vmdq_rx_conf, &vmdq_conf,
			  sizeof(vmdq_conf)));
	(void)(rte_memcpy(&eth_conf->tx_adv_conf.vmdq_dcb_tx_conf, &tx_conf,
			  sizeof(tx_conf)));
	if (rss_enable) {
		eth_conf->rxmode.mq_mode = ETH_MQ_RX_VMDQ_DCB_RSS;
		eth_conf->rx_adv_conf.rss_conf.rss_hf = ETH_RSS_IP |
							ETH_RSS_UDP |
							ETH_RSS_TCP |
							ETH_RSS_SCTP;
	}
	return 0;
}

/*
 * Initialises a given port using global settings and with the rx buffers
 * coming from the mbuf_pool passed as parameter
 */
static inline int
port_init(uint8_t port, struct rte_mempool *mbuf_pool)
{
	struct rte_eth_dev_info dev_info;
	struct rte_eth_conf port_conf = {0};
	const uint16_t rxRingSize = RTE_TEST_RX_DESC_DEFAULT;
	const uint16_t txRingSize = RTE_TEST_TX_DESC_DEFAULT;
	int retval;
	uint16_t q;
	uint16_t queues_per_pool;
	uint32_t max_nb_pools;

	/*
	 * The max pool number from dev_info will be used to validate the pool
	 * number specified in cmd line
	 */
	rte_eth_dev_info_get(port, &dev_info);
	max_nb_pools = (uint32_t)dev_info.max_vmdq_pools;
	/*
	 * We allow to process part of VMDQ pools specified by num_pools in
	 * command line.
	 */
	if (num_pools > max_nb_pools) {
		printf("num_pools %d >max_nb_pools %d\n",
			num_pools, max_nb_pools);
		return -1;
	}

	/*
	 * NIC queues are divided into pf queues and vmdq queues.
	 * There is assumption here all ports have the same configuration!
	*/
	vmdq_queue_base = dev_info.vmdq_queue_base;
	vmdq_pool_base  = dev_info.vmdq_pool_base;
	printf("vmdq queue base: %d pool base %d\n",
		vmdq_queue_base, vmdq_pool_base);
	if (vmdq_pool_base == 0) {
		num_vmdq_queues = dev_info.max_rx_queues;
		num_queues = dev_info.max_rx_queues;
		if (num_tcs != num_vmdq_queues / num_pools) {
			printf("nb_tcs %d is invalid considering with"
				" nb_pools %d, nb_tcs * nb_pools should = %d\n",
				num_tcs, num_pools, num_vmdq_queues);
			return -1;
		}
	} else {
		queues_per_pool = dev_info.vmdq_queue_num /
				  dev_info.max_vmdq_pools;
		if (num_tcs > queues_per_pool) {
			printf("num_tcs %d > num of queues per pool %d\n",
				num_tcs, queues_per_pool);
			return -1;
		}
		num_vmdq_queues = num_pools * queues_per_pool;
		num_queues = vmdq_queue_base + num_vmdq_queues;
		printf("Configured vmdq pool num: %u,"
			" each vmdq pool has %u queues\n",
			num_pools, queues_per_pool);
	}

	if (port >= rte_eth_dev_count())
		return -1;

	retval = get_eth_conf(&port_conf);
	if (retval < 0)
		return retval;

	/*
	 * Though in this example, all queues including pf queues are setup.
	 * This is because VMDQ queues doesn't always start from zero, and the
	 * PMD layer doesn't support selectively initialising part of rx/tx
	 * queues.
	 */
	retval = rte_eth_dev_configure(port, num_queues, num_queues, &port_conf);
	if (retval != 0)
		return retval;

	for (q = 0; q < num_queues; q++) {
		retval = rte_eth_rx_queue_setup(port, q, rxRingSize,
					rte_eth_dev_socket_id(port),
					NULL,
					mbuf_pool);
		if (retval < 0) {
			printf("initialize rx queue %d failed\n", q);
			return retval;
		}
	}

	for (q = 0; q < num_queues; q++) {
		retval = rte_eth_tx_queue_setup(port, q, txRingSize,
					rte_eth_dev_socket_id(port),
					NULL);
		if (retval < 0) {
			printf("initialize tx queue %d failed\n", q);
			return retval;
		}
	}

	retval  = rte_eth_dev_start(port);
	if (retval < 0) {
		printf("port %d start failed\n", port);
		return retval;
	}

	rte_eth_macaddr_get(port, &vmdq_ports_eth_addr[port]);
	printf("Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
			" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
			(unsigned)port,
			vmdq_ports_eth_addr[port].addr_bytes[0],
			vmdq_ports_eth_addr[port].addr_bytes[1],
			vmdq_ports_eth_addr[port].addr_bytes[2],
			vmdq_ports_eth_addr[port].addr_bytes[3],
			vmdq_ports_eth_addr[port].addr_bytes[4],
			vmdq_ports_eth_addr[port].addr_bytes[5]);

	/* Set mac for each pool.*/
	for (q = 0; q < num_pools; q++) {
		struct ether_addr mac;

		mac = pool_addr_template;
		mac.addr_bytes[4] = port;
		mac.addr_bytes[5] = q;
		printf("Port %u vmdq pool %u set mac %02x:%02x:%02x:%02x:%02x:%02x\n",
			port, q,
			mac.addr_bytes[0], mac.addr_bytes[1],
			mac.addr_bytes[2], mac.addr_bytes[3],
			mac.addr_bytes[4], mac.addr_bytes[5]);
		retval = rte_eth_dev_mac_addr_add(port, &mac,
				q + vmdq_pool_base);
		if (retval) {
			printf("mac addr add failed at pool %d\n", q);
			return retval;
		}
	}

	return 0;
}

/* Check num_pools parameter and set it if OK*/
static int
vmdq_parse_num_pools(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 != 16 && n != 32)
		return -1;
	if (n == 16)
		num_pools = ETH_16_POOLS;
	else
		num_pools = ETH_32_POOLS;

	return 0;
}

/* Check num_tcs parameter and set it if OK*/
static int
vmdq_parse_num_tcs(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 != 4 && n != 8)
		return -1;
	if (n == 4)
		num_tcs = ETH_4_TCS;
	else
		num_tcs = ETH_8_TCS;

	return 0;
}

static int
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;
}

/* Display usage */
static void
vmdq_usage(const char *prgname)
{
	printf("%s [EAL options] -- -p PORTMASK]\n"
	"  --nb-pools NP: number of pools (32 default, 16)\n"
	"  --nb-tcs NP: number of TCs (4 default, 8)\n"
	"  --enable-rss: enable RSS (disabled by default)\n",
	       prgname);
}

/*  Parse the argument (num_pools) given in the command line of the application */
static int
vmdq_parse_args(int argc, char **argv)
{
	int opt;
	int option_index;
	unsigned i;
	const char *prgname = argv[0];
	static struct option long_option[] = {
		{"nb-pools", required_argument, NULL, 0},
		{"nb-tcs", required_argument, NULL, 0},
		{"enable-rss", 0, NULL, 0},
		{NULL, 0, 0, 0}
	};

	/* Parse command line */
	while ((opt = getopt_long(argc, argv, "p:", long_option,
		&option_index)) != EOF) {
		switch (opt) {
		/* portmask */
		case 'p':
			enabled_port_mask = parse_portmask(optarg);
			if (enabled_port_mask == 0) {
				printf("invalid portmask\n");
				vmdq_usage(prgname);
				return -1;
			}
			break;
		case 0:
			if (!strcmp(long_option[option_index].name, "nb-pools")) {
				if (vmdq_parse_num_pools(optarg) == -1) {
					printf("invalid number of pools\n");
					return -1;
				}
			}

			if (!strcmp(long_option[option_index].name, "nb-tcs")) {
				if (vmdq_parse_num_tcs(optarg) == -1) {
					printf("invalid number of tcs\n");
					return -1;
				}
			}

			if (!strcmp(long_option[option_index].name, "enable-rss"))
				rss_enable = 1;
			break;

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

	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
		if (enabled_port_mask & (1 << i))
			ports[num_ports++] = (uint8_t)i;
	}

	if (num_ports < 2 || num_ports % 2) {
		printf("Current enabled port number is %u,"
			" but it should be even and at least 2\n", num_ports);
		return -1;
	}

	return 0;
}

static void
update_mac_address(struct rte_mbuf *m, unsigned dst_port)
{
	struct ether_hdr *eth;
	void *tmp;

	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(&vmdq_ports_eth_addr[dst_port], &eth->s_addr);
}

/* When we receive a HUP signal, print out our stats */
static void
sighup_handler(int signum)
{
	unsigned q = vmdq_queue_base;

	for (; q < num_queues; q++) {
		if (q % (num_vmdq_queues / num_pools) == 0)
			printf("\nPool %u: ", (q - vmdq_queue_base) /
					      (num_vmdq_queues / num_pools));
		printf("%lu ", rxPackets[q]);
	}
	printf("\nFinished handling signal %d\n", signum);
}

/*
 * Main thread that does the work, reading from INPUT_PORT
 * and writing to OUTPUT_PORT
 */
static int
lcore_main(void *arg)
{
	const uintptr_t core_num = (uintptr_t)arg;
	const unsigned num_cores = rte_lcore_count();
	uint16_t startQueue, endQueue;
	uint16_t q, i, p;
	const uint16_t quot = (uint16_t)(num_vmdq_queues / num_cores);
	const uint16_t remainder = (uint16_t)(num_vmdq_queues % num_cores);


	if (remainder) {
		if (core_num < remainder) {
			startQueue = (uint16_t)(core_num * (quot + 1));
			endQueue = (uint16_t)(startQueue + quot + 1);
		} else {
			startQueue = (uint16_t)(core_num * quot + remainder);
			endQueue = (uint16_t)(startQueue + quot);
		}
	} else {
		startQueue = (uint16_t)(core_num * quot);
		endQueue = (uint16_t)(startQueue + quot);
	}

	/* vmdq queue idx doesn't always start from zero.*/
	startQueue += vmdq_queue_base;
	endQueue   += vmdq_queue_base;
	printf("Core %u(lcore %u) reading queues %i-%i\n", (unsigned)core_num,
	       rte_lcore_id(), startQueue, endQueue - 1);

	if (startQueue == endQueue) {
		printf("lcore %u has nothing to do\n", (unsigned)core_num);
		return 0;
	}

	for (;;) {
		struct rte_mbuf *buf[MAX_PKT_BURST];
		const uint16_t buf_size = sizeof(buf) / sizeof(buf[0]);
		for (p = 0; p < num_ports; p++) {
			const uint8_t src = ports[p];
			const uint8_t dst = ports[p ^ 1]; /* 0 <-> 1, 2 <-> 3 etc */

			if ((src == INVALID_PORT_ID) || (dst == INVALID_PORT_ID))
				continue;

			for (q = startQueue; q < endQueue; q++) {
				const uint16_t rxCount = rte_eth_rx_burst(src,
					q, buf, buf_size);

				if (unlikely(rxCount == 0))
					continue;

				rxPackets[q] += rxCount;

				for (i = 0; i < rxCount; i++)
					update_mac_address(buf[i], dst);

				const uint16_t txCount = rte_eth_tx_burst(dst,
					q, buf, rxCount);
				if (txCount != rxCount) {
					for (i = txCount; i < rxCount; i++)
						rte_pktmbuf_free(buf[i]);
				}
			}
		}
	}
}

/*
 * Update the global var NUM_PORTS and array PORTS according to system ports number
 * and return valid ports number
 */
static unsigned check_ports_num(unsigned nb_ports)
{
	unsigned valid_num_ports = num_ports;
	unsigned portid;

	if (num_ports > nb_ports) {
		printf("\nSpecified port number(%u) exceeds total system port number(%u)\n",
			num_ports, nb_ports);
		num_ports = nb_ports;
	}

	for (portid = 0; portid < num_ports; portid++) {
		if (ports[portid] >= nb_ports) {
			printf("\nSpecified port ID(%u) exceeds max system port ID(%u)\n",
				ports[portid], (nb_ports - 1));
			ports[portid] = INVALID_PORT_ID;
			valid_num_ports--;
		}
	}
	return valid_num_ports;
}


/* Main function, does initialisation and calls the per-lcore functions */
int
main(int argc, char *argv[])
{
	unsigned cores;
	struct rte_mempool *mbuf_pool;
	unsigned lcore_id;
	uintptr_t i;
	int ret;
	unsigned nb_ports, valid_num_ports;
	uint8_t portid;

	signal(SIGHUP, sighup_handler);

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

	/* parse app arguments */
	ret = vmdq_parse_args(argc, argv);
	if (ret < 0)
		rte_exit(EXIT_FAILURE, "Invalid VMDQ argument\n");

	cores = rte_lcore_count();
	if ((cores & (cores - 1)) != 0 || cores > RTE_MAX_LCORE) {
		rte_exit(EXIT_FAILURE,"This program can only run on an even"
				" number of cores(1-%d)\n\n", RTE_MAX_LCORE);
	}

	nb_ports = rte_eth_dev_count();

	/*
	 * Update the global var NUM_PORTS and global array PORTS
	 * and get value of var VALID_NUM_PORTS according to system ports number
	 */
	valid_num_ports = check_ports_num(nb_ports);

	if (valid_num_ports < 2 || valid_num_ports % 2) {
		printf("Current valid ports number is %u\n", valid_num_ports);
		rte_exit(EXIT_FAILURE, "Error with valid ports number is not even or less than 2\n");
	}

	mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL",
		NUM_MBUFS_PER_PORT * nb_ports, MBUF_CACHE_SIZE,
		0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
	if (mbuf_pool == NULL)
		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");

	/* initialize all ports */
	for (portid = 0; portid < nb_ports; portid++) {
		/* skip ports that are not enabled */
		if ((enabled_port_mask & (1 << portid)) == 0) {
			printf("\nSkipping disabled port %d\n", portid);
			continue;
		}
		if (port_init(portid, mbuf_pool) != 0)
			rte_exit(EXIT_FAILURE, "Cannot initialize network ports\n");
	}

	/* call lcore_main() on every slave lcore */
	i = 0;
	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
		rte_eal_remote_launch(lcore_main, (void*)i++, lcore_id);
	}
	/* call on master too */
	(void) lcore_main((void*)i);

	return 0;
}