forked from grate-driver/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
mpssd.c
1826 lines (1659 loc) · 44 KB
/
mpssd.c
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
/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2013 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Intel MIC User Space Tools.
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <fcntl.h>
#include <getopt.h>
#include <assert.h>
#include <unistd.h>
#include <stdbool.h>
#include <signal.h>
#include <poll.h>
#include <features.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <linux/virtio_ring.h>
#include <linux/virtio_net.h>
#include <linux/virtio_console.h>
#include <linux/virtio_blk.h>
#include <linux/version.h>
#include "mpssd.h"
#include <linux/mic_ioctl.h>
#include <linux/mic_common.h>
#include <tools/endian.h>
static void *init_mic(void *arg);
static FILE *logfp;
static struct mic_info mic_list;
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define min_t(type, x, y) ({ \
type __min1 = (x); \
type __min2 = (y); \
__min1 < __min2 ? __min1 : __min2; })
/* align addr on a size boundary - adjust address up/down if needed */
#define _ALIGN_DOWN(addr, size) ((addr)&(~((size)-1)))
#define _ALIGN_UP(addr, size) _ALIGN_DOWN(addr + size - 1, size)
/* align addr on a size boundary - adjust address up if needed */
#define _ALIGN(addr, size) _ALIGN_UP(addr, size)
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
#define READ_ONCE(x) (*(volatile typeof(x) *)&(x))
#define GSO_ENABLED 1
#define MAX_GSO_SIZE (64 * 1024)
#define ETH_H_LEN 14
#define MAX_NET_PKT_SIZE (_ALIGN_UP(MAX_GSO_SIZE + ETH_H_LEN, 64))
#define MIC_DEVICE_PAGE_END 0x1000
#ifndef VIRTIO_NET_HDR_F_DATA_VALID
#define VIRTIO_NET_HDR_F_DATA_VALID 2 /* Csum is valid */
#endif
static struct {
struct mic_device_desc dd;
struct mic_vqconfig vqconfig[2];
__u32 host_features, guest_acknowledgements;
struct virtio_console_config cons_config;
} virtcons_dev_page = {
.dd = {
.type = VIRTIO_ID_CONSOLE,
.num_vq = ARRAY_SIZE(virtcons_dev_page.vqconfig),
.feature_len = sizeof(virtcons_dev_page.host_features),
.config_len = sizeof(virtcons_dev_page.cons_config),
},
.vqconfig[0] = {
.num = htole16(MIC_VRING_ENTRIES),
},
.vqconfig[1] = {
.num = htole16(MIC_VRING_ENTRIES),
},
};
static struct {
struct mic_device_desc dd;
struct mic_vqconfig vqconfig[2];
__u32 host_features, guest_acknowledgements;
struct virtio_net_config net_config;
} virtnet_dev_page = {
.dd = {
.type = VIRTIO_ID_NET,
.num_vq = ARRAY_SIZE(virtnet_dev_page.vqconfig),
.feature_len = sizeof(virtnet_dev_page.host_features),
.config_len = sizeof(virtnet_dev_page.net_config),
},
.vqconfig[0] = {
.num = htole16(MIC_VRING_ENTRIES),
},
.vqconfig[1] = {
.num = htole16(MIC_VRING_ENTRIES),
},
#if GSO_ENABLED
.host_features = htole32(
1 << VIRTIO_NET_F_CSUM |
1 << VIRTIO_NET_F_GSO |
1 << VIRTIO_NET_F_GUEST_TSO4 |
1 << VIRTIO_NET_F_GUEST_TSO6 |
1 << VIRTIO_NET_F_GUEST_ECN),
#else
.host_features = 0,
#endif
};
static const char *mic_config_dir = "/etc/mpss";
static const char *virtblk_backend = "VIRTBLK_BACKEND";
static struct {
struct mic_device_desc dd;
struct mic_vqconfig vqconfig[1];
__u32 host_features, guest_acknowledgements;
struct virtio_blk_config blk_config;
} virtblk_dev_page = {
.dd = {
.type = VIRTIO_ID_BLOCK,
.num_vq = ARRAY_SIZE(virtblk_dev_page.vqconfig),
.feature_len = sizeof(virtblk_dev_page.host_features),
.config_len = sizeof(virtblk_dev_page.blk_config),
},
.vqconfig[0] = {
.num = htole16(MIC_VRING_ENTRIES),
},
.host_features =
htole32(1<<VIRTIO_BLK_F_SEG_MAX),
.blk_config = {
.seg_max = htole32(MIC_VRING_ENTRIES - 2),
.capacity = htole64(0),
}
};
static char *myname;
static int
tap_configure(struct mic_info *mic, char *dev)
{
pid_t pid;
char *ifargv[7];
char ipaddr[IFNAMSIZ];
int ret = 0;
pid = fork();
if (pid == 0) {
ifargv[0] = "ip";
ifargv[1] = "link";
ifargv[2] = "set";
ifargv[3] = dev;
ifargv[4] = "up";
ifargv[5] = NULL;
mpsslog("Configuring %s\n", dev);
ret = execvp("ip", ifargv);
if (ret < 0) {
mpsslog("%s execvp failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
}
if (pid < 0) {
mpsslog("%s fork failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
ret = waitpid(pid, NULL, 0);
if (ret < 0) {
mpsslog("%s waitpid failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
snprintf(ipaddr, IFNAMSIZ, "172.31.%d.254/24", mic->id + 1);
pid = fork();
if (pid == 0) {
ifargv[0] = "ip";
ifargv[1] = "addr";
ifargv[2] = "add";
ifargv[3] = ipaddr;
ifargv[4] = "dev";
ifargv[5] = dev;
ifargv[6] = NULL;
mpsslog("Configuring %s ipaddr %s\n", dev, ipaddr);
ret = execvp("ip", ifargv);
if (ret < 0) {
mpsslog("%s execvp failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
}
if (pid < 0) {
mpsslog("%s fork failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
ret = waitpid(pid, NULL, 0);
if (ret < 0) {
mpsslog("%s waitpid failed errno %s\n",
mic->name, strerror(errno));
return ret;
}
mpsslog("MIC name %s %s %d DONE!\n",
mic->name, __func__, __LINE__);
return 0;
}
static int tun_alloc(struct mic_info *mic, char *dev)
{
struct ifreq ifr;
int fd, err;
#if GSO_ENABLED
unsigned offload;
#endif
fd = open("/dev/net/tun", O_RDWR);
if (fd < 0) {
mpsslog("Could not open /dev/net/tun %s\n", strerror(errno));
goto done;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR;
if (*dev)
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
err = ioctl(fd, TUNSETIFF, (void *)&ifr);
if (err < 0) {
mpsslog("%s %s %d TUNSETIFF failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
close(fd);
return err;
}
#if GSO_ENABLED
offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6 | TUN_F_TSO_ECN;
err = ioctl(fd, TUNSETOFFLOAD, offload);
if (err < 0) {
mpsslog("%s %s %d TUNSETOFFLOAD failed %s\n",
mic->name, __func__, __LINE__, strerror(errno));
close(fd);
return err;
}
#endif
strcpy(dev, ifr.ifr_name);
mpsslog("Created TAP %s\n", dev);
done:
return fd;
}
#define NET_FD_VIRTIO_NET 0
#define NET_FD_TUN 1
#define MAX_NET_FD 2
static void set_dp(struct mic_info *mic, int type, void *dp)
{
switch (type) {
case VIRTIO_ID_CONSOLE:
mic->mic_console.console_dp = dp;
return;
case VIRTIO_ID_NET:
mic->mic_net.net_dp = dp;
return;
case VIRTIO_ID_BLOCK:
mic->mic_virtblk.block_dp = dp;
return;
}
mpsslog("%s %s %d not found\n", mic->name, __func__, type);
assert(0);
}
static void *get_dp(struct mic_info *mic, int type)
{
switch (type) {
case VIRTIO_ID_CONSOLE:
return mic->mic_console.console_dp;
case VIRTIO_ID_NET:
return mic->mic_net.net_dp;
case VIRTIO_ID_BLOCK:
return mic->mic_virtblk.block_dp;
}
mpsslog("%s %s %d not found\n", mic->name, __func__, type);
assert(0);
return NULL;
}
static struct mic_device_desc *get_device_desc(struct mic_info *mic, int type)
{
struct mic_device_desc *d;
int i;
void *dp = get_dp(mic, type);
for (i = sizeof(struct mic_bootparam); i < PAGE_SIZE;
i += mic_total_desc_size(d)) {
d = dp + i;
/* End of list */
if (d->type == 0)
break;
if (d->type == -1)
continue;
mpsslog("%s %s d-> type %d d %p\n",
mic->name, __func__, d->type, d);
if (d->type == (__u8)type)
return d;
}
mpsslog("%s %s %d not found\n", mic->name, __func__, type);
return NULL;
}
/* See comments in vhost.c for explanation of next_desc() */
static unsigned next_desc(struct vring_desc *desc)
{
unsigned int next;
if (!(le16toh(desc->flags) & VRING_DESC_F_NEXT))
return -1U;
next = le16toh(desc->next);
return next;
}
/* Sum up all the IOVEC length */
static ssize_t
sum_iovec_len(struct mic_copy_desc *copy)
{
ssize_t sum = 0;
unsigned int i;
for (i = 0; i < copy->iovcnt; i++)
sum += copy->iov[i].iov_len;
return sum;
}
static inline void verify_out_len(struct mic_info *mic,
struct mic_copy_desc *copy)
{
if (copy->out_len != sum_iovec_len(copy)) {
mpsslog("%s %s %d BUG copy->out_len 0x%x len 0x%zx\n",
mic->name, __func__, __LINE__,
copy->out_len, sum_iovec_len(copy));
assert(copy->out_len == sum_iovec_len(copy));
}
}
/* Display an iovec */
static void
disp_iovec(struct mic_info *mic, struct mic_copy_desc *copy,
const char *s, int line)
{
unsigned int i;
for (i = 0; i < copy->iovcnt; i++)
mpsslog("%s %s %d copy->iov[%d] addr %p len 0x%zx\n",
mic->name, s, line, i,
copy->iov[i].iov_base, copy->iov[i].iov_len);
}
static inline __u16 read_avail_idx(struct mic_vring *vr)
{
return READ_ONCE(vr->info->avail_idx);
}
static inline void txrx_prepare(int type, bool tx, struct mic_vring *vr,
struct mic_copy_desc *copy, ssize_t len)
{
copy->vr_idx = tx ? 0 : 1;
copy->update_used = true;
if (type == VIRTIO_ID_NET)
copy->iov[1].iov_len = len - sizeof(struct virtio_net_hdr);
else
copy->iov[0].iov_len = len;
}
/* Central API which triggers the copies */
static int
mic_virtio_copy(struct mic_info *mic, int fd,
struct mic_vring *vr, struct mic_copy_desc *copy)
{
int ret;
ret = ioctl(fd, MIC_VIRTIO_COPY_DESC, copy);
if (ret) {
mpsslog("%s %s %d errno %s ret %d\n",
mic->name, __func__, __LINE__,
strerror(errno), ret);
}
return ret;
}
static inline unsigned _vring_size(unsigned int num, unsigned long align)
{
return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (3 + num)
+ align - 1) & ~(align - 1))
+ sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num;
}
/*
* This initialization routine requires at least one
* vring i.e. vr0. vr1 is optional.
*/
static void *
init_vr(struct mic_info *mic, int fd, int type,
struct mic_vring *vr0, struct mic_vring *vr1, int num_vq)
{
int vr_size;
char *va;
vr_size = PAGE_ALIGN(_vring_size(MIC_VRING_ENTRIES,
MIC_VIRTIO_RING_ALIGN) +
sizeof(struct _mic_vring_info));
va = mmap(NULL, MIC_DEVICE_PAGE_END + vr_size * num_vq,
PROT_READ, MAP_SHARED, fd, 0);
if (MAP_FAILED == va) {
mpsslog("%s %s %d mmap failed errno %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
goto done;
}
set_dp(mic, type, va);
vr0->va = (struct mic_vring *)&va[MIC_DEVICE_PAGE_END];
vr0->info = vr0->va +
_vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN);
vring_init(&vr0->vr,
MIC_VRING_ENTRIES, vr0->va, MIC_VIRTIO_RING_ALIGN);
mpsslog("%s %s vr0 %p vr0->info %p vr_size 0x%x vring 0x%x ",
__func__, mic->name, vr0->va, vr0->info, vr_size,
_vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
mpsslog("magic 0x%x expected 0x%x\n",
le32toh(vr0->info->magic), MIC_MAGIC + type);
assert(le32toh(vr0->info->magic) == MIC_MAGIC + type);
if (vr1) {
vr1->va = (struct mic_vring *)
&va[MIC_DEVICE_PAGE_END + vr_size];
vr1->info = vr1->va + _vring_size(MIC_VRING_ENTRIES,
MIC_VIRTIO_RING_ALIGN);
vring_init(&vr1->vr,
MIC_VRING_ENTRIES, vr1->va, MIC_VIRTIO_RING_ALIGN);
mpsslog("%s %s vr1 %p vr1->info %p vr_size 0x%x vring 0x%x ",
__func__, mic->name, vr1->va, vr1->info, vr_size,
_vring_size(MIC_VRING_ENTRIES, MIC_VIRTIO_RING_ALIGN));
mpsslog("magic 0x%x expected 0x%x\n",
le32toh(vr1->info->magic), MIC_MAGIC + type + 1);
assert(le32toh(vr1->info->magic) == MIC_MAGIC + type + 1);
}
done:
return va;
}
static int
wait_for_card_driver(struct mic_info *mic, int fd, int type)
{
struct pollfd pollfd;
int err;
struct mic_device_desc *desc = get_device_desc(mic, type);
__u8 prev_status;
if (!desc)
return -ENODEV;
prev_status = desc->status;
pollfd.fd = fd;
mpsslog("%s %s Waiting .... desc-> type %d status 0x%x\n",
mic->name, __func__, type, desc->status);
while (1) {
pollfd.events = POLLIN;
pollfd.revents = 0;
err = poll(&pollfd, 1, -1);
if (err < 0) {
mpsslog("%s %s poll failed %s\n",
mic->name, __func__, strerror(errno));
continue;
}
if (pollfd.revents) {
if (desc->status != prev_status) {
mpsslog("%s %s Waiting... desc-> type %d "
"status 0x%x\n",
mic->name, __func__, type,
desc->status);
prev_status = desc->status;
}
if (desc->status & VIRTIO_CONFIG_S_DRIVER_OK) {
mpsslog("%s %s poll.revents %d\n",
mic->name, __func__, pollfd.revents);
mpsslog("%s %s desc-> type %d status 0x%x\n",
mic->name, __func__, type,
desc->status);
break;
}
}
}
return 0;
}
/* Spin till we have some descriptors */
static void
spin_for_descriptors(struct mic_info *mic, struct mic_vring *vr)
{
__u16 avail_idx = read_avail_idx(vr);
while (avail_idx == le16toh(READ_ONCE(vr->vr.avail->idx))) {
#ifdef DEBUG
mpsslog("%s %s waiting for desc avail %d info_avail %d\n",
mic->name, __func__,
le16toh(vr->vr.avail->idx), vr->info->avail_idx);
#endif
sched_yield();
}
}
static void *
virtio_net(void *arg)
{
static __u8 vnet_hdr[2][sizeof(struct virtio_net_hdr)];
static __u8 vnet_buf[2][MAX_NET_PKT_SIZE] __attribute__ ((aligned(64)));
struct iovec vnet_iov[2][2] = {
{ { .iov_base = vnet_hdr[0], .iov_len = sizeof(vnet_hdr[0]) },
{ .iov_base = vnet_buf[0], .iov_len = sizeof(vnet_buf[0]) } },
{ { .iov_base = vnet_hdr[1], .iov_len = sizeof(vnet_hdr[1]) },
{ .iov_base = vnet_buf[1], .iov_len = sizeof(vnet_buf[1]) } },
};
struct iovec *iov0 = vnet_iov[0], *iov1 = vnet_iov[1];
struct mic_info *mic = (struct mic_info *)arg;
char if_name[IFNAMSIZ];
struct pollfd net_poll[MAX_NET_FD];
struct mic_vring tx_vr, rx_vr;
struct mic_copy_desc copy;
struct mic_device_desc *desc;
int err;
snprintf(if_name, IFNAMSIZ, "mic%d", mic->id);
mic->mic_net.tap_fd = tun_alloc(mic, if_name);
if (mic->mic_net.tap_fd < 0)
goto done;
if (tap_configure(mic, if_name))
goto done;
mpsslog("MIC name %s id %d\n", mic->name, mic->id);
net_poll[NET_FD_VIRTIO_NET].fd = mic->mic_net.virtio_net_fd;
net_poll[NET_FD_VIRTIO_NET].events = POLLIN;
net_poll[NET_FD_TUN].fd = mic->mic_net.tap_fd;
net_poll[NET_FD_TUN].events = POLLIN;
if (MAP_FAILED == init_vr(mic, mic->mic_net.virtio_net_fd,
VIRTIO_ID_NET, &tx_vr, &rx_vr,
virtnet_dev_page.dd.num_vq)) {
mpsslog("%s init_vr failed %s\n",
mic->name, strerror(errno));
goto done;
}
copy.iovcnt = 2;
desc = get_device_desc(mic, VIRTIO_ID_NET);
while (1) {
ssize_t len;
net_poll[NET_FD_VIRTIO_NET].revents = 0;
net_poll[NET_FD_TUN].revents = 0;
/* Start polling for data from tap and virtio net */
err = poll(net_poll, 2, -1);
if (err < 0) {
mpsslog("%s poll failed %s\n",
__func__, strerror(errno));
continue;
}
if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
err = wait_for_card_driver(mic,
mic->mic_net.virtio_net_fd,
VIRTIO_ID_NET);
if (err) {
mpsslog("%s %s %d Exiting...\n",
mic->name, __func__, __LINE__);
break;
}
}
/*
* Check if there is data to be read from TUN and write to
* virtio net fd if there is.
*/
if (net_poll[NET_FD_TUN].revents & POLLIN) {
copy.iov = iov0;
len = readv(net_poll[NET_FD_TUN].fd,
copy.iov, copy.iovcnt);
if (len > 0) {
struct virtio_net_hdr *hdr
= (struct virtio_net_hdr *)vnet_hdr[0];
/* Disable checksums on the card since we are on
a reliable PCIe link */
hdr->flags |= VIRTIO_NET_HDR_F_DATA_VALID;
#ifdef DEBUG
mpsslog("%s %s %d hdr->flags 0x%x ", mic->name,
__func__, __LINE__, hdr->flags);
mpsslog("copy.out_len %d hdr->gso_type 0x%x\n",
copy.out_len, hdr->gso_type);
#endif
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d read from tap 0x%lx\n",
mic->name, __func__, __LINE__,
len);
#endif
spin_for_descriptors(mic, &tx_vr);
txrx_prepare(VIRTIO_ID_NET, 1, &tx_vr, ©,
len);
err = mic_virtio_copy(mic,
mic->mic_net.virtio_net_fd, &tx_vr,
©);
if (err < 0) {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
}
if (!err)
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d wrote to net 0x%lx\n",
mic->name, __func__, __LINE__,
sum_iovec_len(©));
#endif
/* Reinitialize IOV for next run */
iov0[1].iov_len = MAX_NET_PKT_SIZE;
} else if (len < 0) {
disp_iovec(mic, ©, __func__, __LINE__);
mpsslog("%s %s %d read failed %s ", mic->name,
__func__, __LINE__, strerror(errno));
mpsslog("cnt %d sum %zd\n",
copy.iovcnt, sum_iovec_len(©));
}
}
/*
* Check if there is data to be read from virtio net and
* write to TUN if there is.
*/
if (net_poll[NET_FD_VIRTIO_NET].revents & POLLIN) {
while (rx_vr.info->avail_idx !=
le16toh(rx_vr.vr.avail->idx)) {
copy.iov = iov1;
txrx_prepare(VIRTIO_ID_NET, 0, &rx_vr, ©,
MAX_NET_PKT_SIZE
+ sizeof(struct virtio_net_hdr));
err = mic_virtio_copy(mic,
mic->mic_net.virtio_net_fd, &rx_vr,
©);
if (!err) {
#ifdef DEBUG
struct virtio_net_hdr *hdr
= (struct virtio_net_hdr *)
vnet_hdr[1];
mpsslog("%s %s %d hdr->flags 0x%x, ",
mic->name, __func__, __LINE__,
hdr->flags);
mpsslog("out_len %d gso_type 0x%x\n",
copy.out_len,
hdr->gso_type);
#endif
/* Set the correct output iov_len */
iov1[1].iov_len = copy.out_len -
sizeof(struct virtio_net_hdr);
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__, __LINE__);
mpsslog("read from net 0x%lx\n",
sum_iovec_len(copy));
#endif
len = writev(net_poll[NET_FD_TUN].fd,
copy.iov, copy.iovcnt);
if (len != sum_iovec_len(©)) {
mpsslog("Tun write failed %s ",
strerror(errno));
mpsslog("len 0x%zx ", len);
mpsslog("read_len 0x%zx\n",
sum_iovec_len(©));
} else {
#ifdef DEBUG
disp_iovec(mic, ©, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__,
__LINE__);
mpsslog("wrote to tap 0x%lx\n",
len);
#endif
}
} else {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
break;
}
}
}
if (net_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
}
done:
pthread_exit(NULL);
}
/* virtio_console */
#define VIRTIO_CONSOLE_FD 0
#define MONITOR_FD (VIRTIO_CONSOLE_FD + 1)
#define MAX_CONSOLE_FD (MONITOR_FD + 1) /* must be the last one + 1 */
#define MAX_BUFFER_SIZE PAGE_SIZE
static void *
virtio_console(void *arg)
{
static __u8 vcons_buf[2][PAGE_SIZE];
struct iovec vcons_iov[2] = {
{ .iov_base = vcons_buf[0], .iov_len = sizeof(vcons_buf[0]) },
{ .iov_base = vcons_buf[1], .iov_len = sizeof(vcons_buf[1]) },
};
struct iovec *iov0 = &vcons_iov[0], *iov1 = &vcons_iov[1];
struct mic_info *mic = (struct mic_info *)arg;
int err;
struct pollfd console_poll[MAX_CONSOLE_FD];
int pty_fd;
char *pts_name;
ssize_t len;
struct mic_vring tx_vr, rx_vr;
struct mic_copy_desc copy;
struct mic_device_desc *desc;
pty_fd = posix_openpt(O_RDWR);
if (pty_fd < 0) {
mpsslog("can't open a pseudoterminal master device: %s\n",
strerror(errno));
goto _return;
}
pts_name = ptsname(pty_fd);
if (pts_name == NULL) {
mpsslog("can't get pts name\n");
goto _close_pty;
}
printf("%s console message goes to %s\n", mic->name, pts_name);
mpsslog("%s console message goes to %s\n", mic->name, pts_name);
err = grantpt(pty_fd);
if (err < 0) {
mpsslog("can't grant access: %s %s\n",
pts_name, strerror(errno));
goto _close_pty;
}
err = unlockpt(pty_fd);
if (err < 0) {
mpsslog("can't unlock a pseudoterminal: %s %s\n",
pts_name, strerror(errno));
goto _close_pty;
}
console_poll[MONITOR_FD].fd = pty_fd;
console_poll[MONITOR_FD].events = POLLIN;
console_poll[VIRTIO_CONSOLE_FD].fd = mic->mic_console.virtio_console_fd;
console_poll[VIRTIO_CONSOLE_FD].events = POLLIN;
if (MAP_FAILED == init_vr(mic, mic->mic_console.virtio_console_fd,
VIRTIO_ID_CONSOLE, &tx_vr, &rx_vr,
virtcons_dev_page.dd.num_vq)) {
mpsslog("%s init_vr failed %s\n",
mic->name, strerror(errno));
goto _close_pty;
}
copy.iovcnt = 1;
desc = get_device_desc(mic, VIRTIO_ID_CONSOLE);
for (;;) {
console_poll[MONITOR_FD].revents = 0;
console_poll[VIRTIO_CONSOLE_FD].revents = 0;
err = poll(console_poll, MAX_CONSOLE_FD, -1);
if (err < 0) {
mpsslog("%s %d: poll failed: %s\n", __func__, __LINE__,
strerror(errno));
continue;
}
if (!(desc->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
err = wait_for_card_driver(mic,
mic->mic_console.virtio_console_fd,
VIRTIO_ID_CONSOLE);
if (err) {
mpsslog("%s %s %d Exiting...\n",
mic->name, __func__, __LINE__);
break;
}
}
if (console_poll[MONITOR_FD].revents & POLLIN) {
copy.iov = iov0;
len = readv(pty_fd, copy.iov, copy.iovcnt);
if (len > 0) {
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d read from tap 0x%lx\n",
mic->name, __func__, __LINE__,
len);
#endif
spin_for_descriptors(mic, &tx_vr);
txrx_prepare(VIRTIO_ID_CONSOLE, 1, &tx_vr,
©, len);
err = mic_virtio_copy(mic,
mic->mic_console.virtio_console_fd,
&tx_vr, ©);
if (err < 0) {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
}
if (!err)
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__, __LINE__);
mpsslog("%s %s %d wrote to net 0x%lx\n",
mic->name, __func__, __LINE__,
sum_iovec_len(copy));
#endif
/* Reinitialize IOV for next run */
iov0->iov_len = PAGE_SIZE;
} else if (len < 0) {
disp_iovec(mic, ©, __func__, __LINE__);
mpsslog("%s %s %d read failed %s ",
mic->name, __func__, __LINE__,
strerror(errno));
mpsslog("cnt %d sum %zd\n",
copy.iovcnt, sum_iovec_len(©));
}
}
if (console_poll[VIRTIO_CONSOLE_FD].revents & POLLIN) {
while (rx_vr.info->avail_idx !=
le16toh(rx_vr.vr.avail->idx)) {
copy.iov = iov1;
txrx_prepare(VIRTIO_ID_CONSOLE, 0, &rx_vr,
©, PAGE_SIZE);
err = mic_virtio_copy(mic,
mic->mic_console.virtio_console_fd,
&rx_vr, ©);
if (!err) {
/* Set the correct output iov_len */
iov1->iov_len = copy.out_len;
verify_out_len(mic, ©);
#ifdef DEBUG
disp_iovec(mic, copy, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__, __LINE__);
mpsslog("read from net 0x%lx\n",
sum_iovec_len(copy));
#endif
len = writev(pty_fd,
copy.iov, copy.iovcnt);
if (len != sum_iovec_len(©)) {
mpsslog("Tun write failed %s ",
strerror(errno));
mpsslog("len 0x%zx ", len);
mpsslog("read_len 0x%zx\n",
sum_iovec_len(©));
} else {
#ifdef DEBUG
disp_iovec(mic, copy, __func__,
__LINE__);
mpsslog("%s %s %d ",
mic->name, __func__,
__LINE__);
mpsslog("wrote to tap 0x%lx\n",
len);
#endif
}
} else {
mpsslog("%s %s %d mic_virtio_copy %s\n",
mic->name, __func__, __LINE__,
strerror(errno));
break;
}
}
}
if (console_poll[NET_FD_VIRTIO_NET].revents & POLLERR)
mpsslog("%s: %s: POLLERR\n", __func__, mic->name);
}
_close_pty:
close(pty_fd);
_return:
pthread_exit(NULL);
}
static void
add_virtio_device(struct mic_info *mic, struct mic_device_desc *dd)
{
char path[PATH_MAX];
int fd, err;
snprintf(path, PATH_MAX, "/dev/vop_virtio%d", mic->id);
fd = open(path, O_RDWR);
if (fd < 0) {
mpsslog("Could not open %s %s\n", path, strerror(errno));
return;
}
err = ioctl(fd, MIC_VIRTIO_ADD_DEVICE, dd);
if (err < 0) {
mpsslog("Could not add %d %s\n", dd->type, strerror(errno));
close(fd);
return;
}
switch (dd->type) {
case VIRTIO_ID_NET:
mic->mic_net.virtio_net_fd = fd;
mpsslog("Added VIRTIO_ID_NET for %s\n", mic->name);
break;
case VIRTIO_ID_CONSOLE:
mic->mic_console.virtio_console_fd = fd;
mpsslog("Added VIRTIO_ID_CONSOLE for %s\n", mic->name);
break;
case VIRTIO_ID_BLOCK:
mic->mic_virtblk.virtio_block_fd = fd;
mpsslog("Added VIRTIO_ID_BLOCK for %s\n", mic->name);
break;
}
}
static bool
set_backend_file(struct mic_info *mic)
{
FILE *config;
char buff[PATH_MAX], *line, *evv, *p;
snprintf(buff, PATH_MAX, "%s/mpssd%03d.conf", mic_config_dir, mic->id);
config = fopen(buff, "r");
if (config == NULL)
return false;
do { /* look for "virtblk_backend=XXXX" */
line = fgets(buff, PATH_MAX, config);
if (line == NULL)
break;
if (*line == '#')
continue;
p = strchr(line, '\n');
if (p)
*p = '\0';
} while (strncmp(line, virtblk_backend, strlen(virtblk_backend)) != 0);
fclose(config);
if (line == NULL)
return false;
evv = strchr(line, '=');
if (evv == NULL)
return false;
mic->mic_virtblk.backend_file = malloc(strlen(evv) + 1);
if (mic->mic_virtblk.backend_file == NULL) {
mpsslog("%s %d can't allocate memory\n", mic->name, mic->id);
return false;
}
strcpy(mic->mic_virtblk.backend_file, evv + 1);
return true;
}
#define SECTOR_SIZE 512
static bool
set_backend_size(struct mic_info *mic)
{
mic->mic_virtblk.backend_size = lseek(mic->mic_virtblk.backend, 0,
SEEK_END);
if (mic->mic_virtblk.backend_size < 0) {
mpsslog("%s: can't seek: %s\n",