summaryrefslogtreecommitdiff
path: root/drivers/net/af_packet/rte_eth_af_packet.c
blob: 264cfc08faee9da764e6aa6d210847ae7c0b18f7 (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
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2014 John W. Linville <linville@tuxdriver.com>
 * Originally based upon librte_pmd_pcap code:
 * Copyright(c) 2010-2015 Intel Corporation.
 * Copyright(c) 2014 6WIND S.A.
 * All rights reserved.
 */

#include <rte_mbuf.h>
#include <rte_ethdev_driver.h>
#include <rte_ethdev_vdev.h>
#include <rte_malloc.h>
#include <rte_kvargs.h>
#include <rte_bus_vdev.h>

#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <poll.h>

#define ETH_AF_PACKET_IFACE_ARG		"iface"
#define ETH_AF_PACKET_NUM_Q_ARG		"qpairs"
#define ETH_AF_PACKET_BLOCKSIZE_ARG	"blocksz"
#define ETH_AF_PACKET_FRAMESIZE_ARG	"framesz"
#define ETH_AF_PACKET_FRAMECOUNT_ARG	"framecnt"
#define ETH_AF_PACKET_QDISC_BYPASS_ARG	"qdisc_bypass"

#define DFLT_BLOCK_SIZE		(1 << 12)
#define DFLT_FRAME_SIZE		(1 << 11)
#define DFLT_FRAME_COUNT	(1 << 9)

#define RTE_PMD_AF_PACKET_MAX_RINGS 16

struct pkt_rx_queue {
	int sockfd;

	struct iovec *rd;
	uint8_t *map;
	unsigned int framecount;
	unsigned int framenum;

	struct rte_mempool *mb_pool;
	uint16_t in_port;

	volatile unsigned long rx_pkts;
	volatile unsigned long err_pkts;
	volatile unsigned long rx_bytes;
};

struct pkt_tx_queue {
	int sockfd;
	unsigned int frame_data_size;

	struct iovec *rd;
	uint8_t *map;
	unsigned int framecount;
	unsigned int framenum;

	volatile unsigned long tx_pkts;
	volatile unsigned long err_pkts;
	volatile unsigned long tx_bytes;
};

struct pmd_internals {
	unsigned nb_queues;

	int if_index;
	char *if_name;
	struct ether_addr eth_addr;

	struct tpacket_req req;

	struct pkt_rx_queue rx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
	struct pkt_tx_queue tx_queue[RTE_PMD_AF_PACKET_MAX_RINGS];
};

static const char *valid_arguments[] = {
	ETH_AF_PACKET_IFACE_ARG,
	ETH_AF_PACKET_NUM_Q_ARG,
	ETH_AF_PACKET_BLOCKSIZE_ARG,
	ETH_AF_PACKET_FRAMESIZE_ARG,
	ETH_AF_PACKET_FRAMECOUNT_ARG,
	ETH_AF_PACKET_QDISC_BYPASS_ARG,
	NULL
};

static struct rte_eth_link pmd_link = {
	.link_speed = ETH_SPEED_NUM_10G,
	.link_duplex = ETH_LINK_FULL_DUPLEX,
	.link_status = ETH_LINK_DOWN,
	.link_autoneg = ETH_LINK_FIXED,
};

static int af_packet_logtype;

#define PMD_LOG(level, fmt, args...) \
	rte_log(RTE_LOG_ ## level, af_packet_logtype, \
		"%s(): " fmt "\n", __func__, ##args)

static uint16_t
eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
	unsigned i;
	struct tpacket2_hdr *ppd;
	struct rte_mbuf *mbuf;
	uint8_t *pbuf;
	struct pkt_rx_queue *pkt_q = queue;
	uint16_t num_rx = 0;
	unsigned long num_rx_bytes = 0;
	unsigned int framecount, framenum;

	if (unlikely(nb_pkts == 0))
		return 0;

	/*
	 * Reads the given number of packets from the AF_PACKET socket one by
	 * one and copies the packet data into a newly allocated mbuf.
	 */
	framecount = pkt_q->framecount;
	framenum = pkt_q->framenum;
	for (i = 0; i < nb_pkts; i++) {
		/* point at the next incoming frame */
		ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
		if ((ppd->tp_status & TP_STATUS_USER) == 0)
			break;

		/* allocate the next mbuf */
		mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
		if (unlikely(mbuf == NULL))
			break;

		/* packet will fit in the mbuf, go ahead and receive it */
		rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
		pbuf = (uint8_t *) ppd + ppd->tp_mac;
		memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));

		/* check for vlan info */
		if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
			mbuf->vlan_tci = ppd->tp_vlan_tci;
			mbuf->ol_flags |= (PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
		}

		/* release incoming frame and advance ring buffer */
		ppd->tp_status = TP_STATUS_KERNEL;
		if (++framenum >= framecount)
			framenum = 0;
		mbuf->port = pkt_q->in_port;

		/* account for the receive frame */
		bufs[i] = mbuf;
		num_rx++;
		num_rx_bytes += mbuf->pkt_len;
	}
	pkt_q->framenum = framenum;
	pkt_q->rx_pkts += num_rx;
	pkt_q->rx_bytes += num_rx_bytes;
	return num_rx;
}

/*
 * Callback to handle sending packets through a real NIC.
 */
static uint16_t
eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
{
	struct tpacket2_hdr *ppd;
	struct rte_mbuf *mbuf;
	uint8_t *pbuf;
	unsigned int framecount, framenum;
	struct pollfd pfd;
	struct pkt_tx_queue *pkt_q = queue;
	uint16_t num_tx = 0;
	unsigned long num_tx_bytes = 0;
	int i;

	if (unlikely(nb_pkts == 0))
		return 0;

	memset(&pfd, 0, sizeof(pfd));
	pfd.fd = pkt_q->sockfd;
	pfd.events = POLLOUT;
	pfd.revents = 0;

	framecount = pkt_q->framecount;
	framenum = pkt_q->framenum;
	ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
	for (i = 0; i < nb_pkts; i++) {
		mbuf = *bufs++;

		/* drop oversized packets */
		if (mbuf->pkt_len > pkt_q->frame_data_size) {
			rte_pktmbuf_free(mbuf);
			continue;
		}

		/* insert vlan info if necessary */
		if (mbuf->ol_flags & PKT_TX_VLAN_PKT) {
			if (rte_vlan_insert(&mbuf)) {
				rte_pktmbuf_free(mbuf);
				continue;
			}
		}

		/* point at the next incoming frame */
		if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
		    (poll(&pfd, 1, -1) < 0))
			break;

		/* copy the tx frame data */
		pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
			sizeof(struct sockaddr_ll);

		struct rte_mbuf *tmp_mbuf = mbuf;
		while (tmp_mbuf) {
			uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf);
			memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len);
			pbuf += data_len;
			tmp_mbuf = tmp_mbuf->next;
		}

		ppd->tp_len = mbuf->pkt_len;
		ppd->tp_snaplen = mbuf->pkt_len;

		/* release incoming frame and advance ring buffer */
		ppd->tp_status = TP_STATUS_SEND_REQUEST;
		if (++framenum >= framecount)
			framenum = 0;
		ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;

		num_tx++;
		num_tx_bytes += mbuf->pkt_len;
		rte_pktmbuf_free(mbuf);
	}

	/* kick-off transmits */
	if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1) {
		/* error sending -- no packets transmitted */
		num_tx = 0;
		num_tx_bytes = 0;
	}

	pkt_q->framenum = framenum;
	pkt_q->tx_pkts += num_tx;
	pkt_q->err_pkts += i - num_tx;
	pkt_q->tx_bytes += num_tx_bytes;
	return i;
}

static int
eth_dev_start(struct rte_eth_dev *dev)
{
	dev->data->dev_link.link_status = ETH_LINK_UP;
	return 0;
}

/*
 * This function gets called when the current port gets stopped.
 */
static void
eth_dev_stop(struct rte_eth_dev *dev)
{
	unsigned i;
	int sockfd;
	struct pmd_internals *internals = dev->data->dev_private;

	for (i = 0; i < internals->nb_queues; i++) {
		sockfd = internals->rx_queue[i].sockfd;
		if (sockfd != -1)
			close(sockfd);

		/* Prevent use after free in case tx fd == rx fd */
		if (sockfd != internals->tx_queue[i].sockfd) {
			sockfd = internals->tx_queue[i].sockfd;
			if (sockfd != -1)
				close(sockfd);
		}

		internals->rx_queue[i].sockfd = -1;
		internals->tx_queue[i].sockfd = -1;
	}

	dev->data->dev_link.link_status = ETH_LINK_DOWN;
}

static int
eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
{
	return 0;
}

static void
eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
{
	struct pmd_internals *internals = dev->data->dev_private;

	dev_info->if_index = internals->if_index;
	dev_info->max_mac_addrs = 1;
	dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
	dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
	dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
	dev_info->min_rx_bufsize = 0;
}

static int
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
{
	unsigned i, imax;
	unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
	unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
	const struct pmd_internals *internal = dev->data->dev_private;

	imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
	        internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
	for (i = 0; i < imax; i++) {
		igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
		igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
		rx_total += igb_stats->q_ipackets[i];
		rx_bytes_total += igb_stats->q_ibytes[i];
	}

	imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
	        internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
	for (i = 0; i < imax; i++) {
		igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
		igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts;
		igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
		tx_total += igb_stats->q_opackets[i];
		tx_err_total += igb_stats->q_errors[i];
		tx_bytes_total += igb_stats->q_obytes[i];
	}

	igb_stats->ipackets = rx_total;
	igb_stats->ibytes = rx_bytes_total;
	igb_stats->opackets = tx_total;
	igb_stats->oerrors = tx_err_total;
	igb_stats->obytes = tx_bytes_total;
	return 0;
}

static void
eth_stats_reset(struct rte_eth_dev *dev)
{
	unsigned i;
	struct pmd_internals *internal = dev->data->dev_private;

	for (i = 0; i < internal->nb_queues; i++) {
		internal->rx_queue[i].rx_pkts = 0;
		internal->rx_queue[i].rx_bytes = 0;
	}

	for (i = 0; i < internal->nb_queues; i++) {
		internal->tx_queue[i].tx_pkts = 0;
		internal->tx_queue[i].err_pkts = 0;
		internal->tx_queue[i].tx_bytes = 0;
	}
}

static void
eth_dev_close(struct rte_eth_dev *dev __rte_unused)
{
}

static void
eth_queue_release(void *q __rte_unused)
{
}

static int
eth_link_update(struct rte_eth_dev *dev __rte_unused,
                int wait_to_complete __rte_unused)
{
	return 0;
}

static int
eth_rx_queue_setup(struct rte_eth_dev *dev,
                   uint16_t rx_queue_id,
                   uint16_t nb_rx_desc __rte_unused,
                   unsigned int socket_id __rte_unused,
                   const struct rte_eth_rxconf *rx_conf __rte_unused,
                   struct rte_mempool *mb_pool)
{
	struct pmd_internals *internals = dev->data->dev_private;
	struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
	unsigned int buf_size, data_size;

	pkt_q->mb_pool = mb_pool;

	/* Now get the space available for data in the mbuf */
	buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
		RTE_PKTMBUF_HEADROOM;
	data_size = internals->req.tp_frame_size;
	data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);

	if (data_size > buf_size) {
		PMD_LOG(ERR,
			"%s: %d bytes will not fit in mbuf (%d bytes)",
			dev->device->name, data_size, buf_size);
		return -ENOMEM;
	}

	dev->data->rx_queues[rx_queue_id] = pkt_q;
	pkt_q->in_port = dev->data->port_id;

	return 0;
}

static int
eth_tx_queue_setup(struct rte_eth_dev *dev,
                   uint16_t tx_queue_id,
                   uint16_t nb_tx_desc __rte_unused,
                   unsigned int socket_id __rte_unused,
                   const struct rte_eth_txconf *tx_conf __rte_unused)
{

	struct pmd_internals *internals = dev->data->dev_private;

	dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
	return 0;
}

static int
eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
{
	struct pmd_internals *internals = dev->data->dev_private;
	struct ifreq ifr = { .ifr_mtu = mtu };
	int ret;
	int s;
	unsigned int data_size = internals->req.tp_frame_size -
				 TPACKET2_HDRLEN;

	if (mtu > data_size)
		return -EINVAL;

	s = socket(PF_INET, SOCK_DGRAM, 0);
	if (s < 0)
		return -EINVAL;

	snprintf(ifr.ifr_name, IFNAMSIZ, "%s", internals->if_name);
	ret = ioctl(s, SIOCSIFMTU, &ifr);
	close(s);

	if (ret < 0)
		return -EINVAL;

	return 0;
}

static void
eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
{
	struct ifreq ifr;
	int s;

	s = socket(PF_INET, SOCK_DGRAM, 0);
	if (s < 0)
		return;

	snprintf(ifr.ifr_name, IFNAMSIZ, "%s", if_name);
	if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
		goto out;
	ifr.ifr_flags &= mask;
	ifr.ifr_flags |= flags;
	if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0)
		goto out;
out:
	close(s);
}

static void
eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
{
	struct pmd_internals *internals = dev->data->dev_private;

	eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
}

static void
eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
{
	struct pmd_internals *internals = dev->data->dev_private;

	eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
}

static const struct eth_dev_ops ops = {
	.dev_start = eth_dev_start,
	.dev_stop = eth_dev_stop,
	.dev_close = eth_dev_close,
	.dev_configure = eth_dev_configure,
	.dev_infos_get = eth_dev_info,
	.mtu_set = eth_dev_mtu_set,
	.promiscuous_enable = eth_dev_promiscuous_enable,
	.promiscuous_disable = eth_dev_promiscuous_disable,
	.rx_queue_setup = eth_rx_queue_setup,
	.tx_queue_setup = eth_tx_queue_setup,
	.rx_queue_release = eth_queue_release,
	.tx_queue_release = eth_queue_release,
	.link_update = eth_link_update,
	.stats_get = eth_stats_get,
	.stats_reset = eth_stats_reset,
};

/*
 * Opens an AF_PACKET socket
 */
static int
open_packet_iface(const char *key __rte_unused,
                  const char *value __rte_unused,
                  void *extra_args)
{
	int *sockfd = extra_args;

	/* Open an AF_PACKET socket... */
	*sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
	if (*sockfd == -1) {
		PMD_LOG(ERR, "Could not open AF_PACKET socket");
		return -1;
	}

	return 0;
}

static struct rte_vdev_driver pmd_af_packet_drv;

static int
rte_pmd_init_internals(struct rte_vdev_device *dev,
                       const int sockfd,
                       const unsigned nb_queues,
                       unsigned int blocksize,
                       unsigned int blockcnt,
                       unsigned int framesize,
                       unsigned int framecnt,
		       unsigned int qdisc_bypass,
                       struct pmd_internals **internals,
                       struct rte_eth_dev **eth_dev,
                       struct rte_kvargs *kvlist)
{
	const char *name = rte_vdev_device_name(dev);
	const unsigned int numa_node = dev->device.numa_node;
	struct rte_eth_dev_data *data = NULL;
	struct rte_kvargs_pair *pair = NULL;
	struct ifreq ifr;
	size_t ifnamelen;
	unsigned k_idx;
	struct sockaddr_ll sockaddr;
	struct tpacket_req *req;
	struct pkt_rx_queue *rx_queue;
	struct pkt_tx_queue *tx_queue;
	int rc, tpver, discard;
	int qsockfd = -1;
	unsigned int i, q, rdsize;
#if defined(PACKET_FANOUT)
	int fanout_arg;
#endif

	for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
		pair = &kvlist->pairs[k_idx];
		if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
			break;
	}
	if (pair == NULL) {
		PMD_LOG(ERR,
			"%s: no interface specified for AF_PACKET ethdev",
		        name);
		return -1;
	}

	PMD_LOG(INFO,
		"%s: creating AF_PACKET-backed ethdev on numa socket %u",
		name, numa_node);

	*internals = rte_zmalloc_socket(name, sizeof(**internals),
	                                0, numa_node);
	if (*internals == NULL)
		return -1;

	for (q = 0; q < nb_queues; q++) {
		(*internals)->rx_queue[q].map = MAP_FAILED;
		(*internals)->tx_queue[q].map = MAP_FAILED;
	}

	req = &((*internals)->req);

	req->tp_block_size = blocksize;
	req->tp_block_nr = blockcnt;
	req->tp_frame_size = framesize;
	req->tp_frame_nr = framecnt;

	ifnamelen = strlen(pair->value);
	if (ifnamelen < sizeof(ifr.ifr_name)) {
		memcpy(ifr.ifr_name, pair->value, ifnamelen);
		ifr.ifr_name[ifnamelen] = '\0';
	} else {
		PMD_LOG(ERR,
			"%s: I/F name too long (%s)",
			name, pair->value);
		return -1;
	}
	if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
		PMD_LOG(ERR,
			"%s: ioctl failed (SIOCGIFINDEX)",
		        name);
		return -1;
	}
	(*internals)->if_name = strdup(pair->value);
	if ((*internals)->if_name == NULL)
		return -1;
	(*internals)->if_index = ifr.ifr_ifindex;

	if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
		PMD_LOG(ERR,
			"%s: ioctl failed (SIOCGIFHWADDR)",
		        name);
		return -1;
	}
	memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);

	memset(&sockaddr, 0, sizeof(sockaddr));
	sockaddr.sll_family = AF_PACKET;
	sockaddr.sll_protocol = htons(ETH_P_ALL);
	sockaddr.sll_ifindex = (*internals)->if_index;

#if defined(PACKET_FANOUT)
	fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
	fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
#if defined(PACKET_FANOUT_FLAG_ROLLOVER)
	fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
#endif
#endif

	for (q = 0; q < nb_queues; q++) {
		/* Open an AF_PACKET socket for this queue... */
		qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
		if (qsockfd == -1) {
			PMD_LOG(ERR,
				"%s: could not open AF_PACKET socket",
			        name);
			return -1;
		}

		tpver = TPACKET_V2;
		rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
				&tpver, sizeof(tpver));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not set PACKET_VERSION on AF_PACKET socket for %s",
				name, pair->value);
			goto error;
		}

		discard = 1;
		rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
				&discard, sizeof(discard));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not set PACKET_LOSS on AF_PACKET socket for %s",
				name, pair->value);
			goto error;
		}

#if defined(PACKET_QDISC_BYPASS)
		rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
				&qdisc_bypass, sizeof(qdisc_bypass));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not set PACKET_QDISC_BYPASS on AF_PACKET socket for %s",
				name, pair->value);
			goto error;
		}
#else
		RTE_SET_USED(qdisc_bypass);
#endif

		rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not set PACKET_RX_RING on AF_PACKET socket for %s",
				name, pair->value);
			goto error;
		}

		rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not set PACKET_TX_RING on AF_PACKET "
				"socket for %s", name, pair->value);
			goto error;
		}

		rx_queue = &((*internals)->rx_queue[q]);
		rx_queue->framecount = req->tp_frame_nr;

		rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
				    PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
				    qsockfd, 0);
		if (rx_queue->map == MAP_FAILED) {
			PMD_LOG(ERR,
				"%s: call to mmap failed on AF_PACKET socket for %s",
				name, pair->value);
			goto error;
		}

		/* rdsize is same for both Tx and Rx */
		rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));

		rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
		if (rx_queue->rd == NULL)
			goto error;
		for (i = 0; i < req->tp_frame_nr; ++i) {
			rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
			rx_queue->rd[i].iov_len = req->tp_frame_size;
		}
		rx_queue->sockfd = qsockfd;

		tx_queue = &((*internals)->tx_queue[q]);
		tx_queue->framecount = req->tp_frame_nr;
		tx_queue->frame_data_size = req->tp_frame_size;
		tx_queue->frame_data_size -= TPACKET2_HDRLEN -
			sizeof(struct sockaddr_ll);

		tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;

		tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
		if (tx_queue->rd == NULL)
			goto error;
		for (i = 0; i < req->tp_frame_nr; ++i) {
			tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
			tx_queue->rd[i].iov_len = req->tp_frame_size;
		}
		tx_queue->sockfd = qsockfd;

		rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not bind AF_PACKET socket to %s",
			        name, pair->value);
			goto error;
		}

#if defined(PACKET_FANOUT)
		rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
				&fanout_arg, sizeof(fanout_arg));
		if (rc == -1) {
			PMD_LOG(ERR,
				"%s: could not set PACKET_FANOUT on AF_PACKET socket "
				"for %s", name, pair->value);
			goto error;
		}
#endif
	}

	/* reserve an ethdev entry */
	*eth_dev = rte_eth_vdev_allocate(dev, 0);
	if (*eth_dev == NULL)
		goto error;

	/*
	 * now put it all together
	 * - store queue data in internals,
	 * - store numa_node in eth_dev
	 * - point eth_dev_data to internals
	 * - and point eth_dev structure to new eth_dev_data structure
	 */

	(*internals)->nb_queues = nb_queues;

	data = (*eth_dev)->data;
	data->dev_private = *internals;
	data->nb_rx_queues = (uint16_t)nb_queues;
	data->nb_tx_queues = (uint16_t)nb_queues;
	data->dev_link = pmd_link;
	data->mac_addrs = &(*internals)->eth_addr;

	(*eth_dev)->dev_ops = &ops;

	return 0;

error:
	if (qsockfd != -1)
		close(qsockfd);
	for (q = 0; q < nb_queues; q++) {
		munmap((*internals)->rx_queue[q].map,
		       2 * req->tp_block_size * req->tp_block_nr);

		rte_free((*internals)->rx_queue[q].rd);
		rte_free((*internals)->tx_queue[q].rd);
		if (((*internals)->rx_queue[q].sockfd != 0) &&
			((*internals)->rx_queue[q].sockfd != qsockfd))
			close((*internals)->rx_queue[q].sockfd);
	}
	free((*internals)->if_name);
	rte_free(*internals);
	return -1;
}

static int
rte_eth_from_packet(struct rte_vdev_device *dev,
                    int const *sockfd,
                    struct rte_kvargs *kvlist)
{
	const char *name = rte_vdev_device_name(dev);
	struct pmd_internals *internals = NULL;
	struct rte_eth_dev *eth_dev = NULL;
	struct rte_kvargs_pair *pair = NULL;
	unsigned k_idx;
	unsigned int blockcount;
	unsigned int blocksize = DFLT_BLOCK_SIZE;
	unsigned int framesize = DFLT_FRAME_SIZE;
	unsigned int framecount = DFLT_FRAME_COUNT;
	unsigned int qpairs = 1;
	unsigned int qdisc_bypass = 1;

	/* do some parameter checking */
	if (*sockfd < 0)
		return -1;

	/*
	 * Walk arguments for configurable settings
	 */
	for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
		pair = &kvlist->pairs[k_idx];
		if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
			qpairs = atoi(pair->value);
			if (qpairs < 1 ||
			    qpairs > RTE_PMD_AF_PACKET_MAX_RINGS) {
				PMD_LOG(ERR,
					"%s: invalid qpairs value",
				        name);
				return -1;
			}
			continue;
		}
		if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
			blocksize = atoi(pair->value);
			if (!blocksize) {
				PMD_LOG(ERR,
					"%s: invalid blocksize value",
				        name);
				return -1;
			}
			continue;
		}
		if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
			framesize = atoi(pair->value);
			if (!framesize) {
				PMD_LOG(ERR,
					"%s: invalid framesize value",
				        name);
				return -1;
			}
			continue;
		}
		if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
			framecount = atoi(pair->value);
			if (!framecount) {
				PMD_LOG(ERR,
					"%s: invalid framecount value",
				        name);
				return -1;
			}
			continue;
		}
		if (strstr(pair->key, ETH_AF_PACKET_QDISC_BYPASS_ARG) != NULL) {
			qdisc_bypass = atoi(pair->value);
			if (qdisc_bypass > 1) {
				PMD_LOG(ERR,
					"%s: invalid bypass value",
					name);
				return -1;
			}
			continue;
		}
	}

	if (framesize > blocksize) {
		PMD_LOG(ERR,
			"%s: AF_PACKET MMAP frame size exceeds block size!",
		        name);
		return -1;
	}

	blockcount = framecount / (blocksize / framesize);
	if (!blockcount) {
		PMD_LOG(ERR,
			"%s: invalid AF_PACKET MMAP parameters", name);
		return -1;
	}

	PMD_LOG(INFO, "%s: AF_PACKET MMAP parameters:", name);
	PMD_LOG(INFO, "%s:\tblock size %d", name, blocksize);
	PMD_LOG(INFO, "%s:\tblock count %d", name, blockcount);
	PMD_LOG(INFO, "%s:\tframe size %d", name, framesize);
	PMD_LOG(INFO, "%s:\tframe count %d", name, framecount);

	if (rte_pmd_init_internals(dev, *sockfd, qpairs,
				   blocksize, blockcount,
				   framesize, framecount,
				   qdisc_bypass,
				   &internals, &eth_dev,
				   kvlist) < 0)
		return -1;

	eth_dev->rx_pkt_burst = eth_af_packet_rx;
	eth_dev->tx_pkt_burst = eth_af_packet_tx;

	rte_eth_dev_probing_finish(eth_dev);
	return 0;
}

static int
rte_pmd_af_packet_probe(struct rte_vdev_device *dev)
{
	int ret = 0;
	struct rte_kvargs *kvlist;
	int sockfd = -1;
	struct rte_eth_dev *eth_dev;
	const char *name = rte_vdev_device_name(dev);

	PMD_LOG(INFO, "Initializing pmd_af_packet for %s", name);

	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
		eth_dev = rte_eth_dev_attach_secondary(name);
		if (!eth_dev) {
			PMD_LOG(ERR, "Failed to probe %s", name);
			return -1;
		}
		/* TODO: request info from primary to set up Rx and Tx */
		eth_dev->dev_ops = &ops;
		eth_dev->device = &dev->device;
		rte_eth_dev_probing_finish(eth_dev);
		return 0;
	}

	kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
	if (kvlist == NULL) {
		ret = -1;
		goto exit;
	}

	/*
	 * If iface argument is passed we open the NICs and use them for
	 * reading / writing
	 */
	if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {

		ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
		                         &open_packet_iface, &sockfd);
		if (ret < 0)
			goto exit;
	}

	if (dev->device.numa_node == SOCKET_ID_ANY)
		dev->device.numa_node = rte_socket_id();

	ret = rte_eth_from_packet(dev, &sockfd, kvlist);
	close(sockfd); /* no longer needed */

exit:
	rte_kvargs_free(kvlist);
	return ret;
}

static int
rte_pmd_af_packet_remove(struct rte_vdev_device *dev)
{
	struct rte_eth_dev *eth_dev = NULL;
	struct pmd_internals *internals;
	unsigned q;

	PMD_LOG(INFO, "Closing AF_PACKET ethdev on numa socket %u",
		rte_socket_id());

	if (dev == NULL)
		return -1;

	/* find the ethdev entry */
	eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
	if (eth_dev == NULL)
		return -1;

	/* mac_addrs must not be freed alone because part of dev_private */
	eth_dev->data->mac_addrs = NULL;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return rte_eth_dev_release_port(eth_dev);

	internals = eth_dev->data->dev_private;
	for (q = 0; q < internals->nb_queues; q++) {
		rte_free(internals->rx_queue[q].rd);
		rte_free(internals->tx_queue[q].rd);
	}
	free(internals->if_name);

	rte_eth_dev_release_port(eth_dev);

	return 0;
}

static struct rte_vdev_driver pmd_af_packet_drv = {
	.probe = rte_pmd_af_packet_probe,
	.remove = rte_pmd_af_packet_remove,
};

RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv);
RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet);
RTE_PMD_REGISTER_PARAM_STRING(net_af_packet,
	"iface=<string> "
	"qpairs=<int> "
	"blocksz=<int> "
	"framesz=<int> "
	"framecnt=<int> "
	"qdisc_bypass=<0|1>");

RTE_INIT(af_packet_init_log)
{
	af_packet_logtype = rte_log_register("pmd.net.packet");
	if (af_packet_logtype >= 0)
		rte_log_set_level(af_packet_logtype, RTE_LOG_NOTICE);
}