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43#include <linux/module.h>
44#include <linux/init.h>
45#include <linux/interrupt.h>
46#include <linux/hrtimer.h>
47#include <linux/list.h>
48#include <linux/proc_fs.h>
49#include <linux/seq_file.h>
50#include <linux/uio.h>
51#include <linux/net.h>
52#include <linux/netdevice.h>
53#include <linux/socket.h>
54#include <linux/if_arp.h>
55#include <linux/skbuff.h>
56#include <linux/can.h>
57#include <linux/can/core.h>
58#include <linux/can/skb.h>
59#include <linux/can/bcm.h>
60#include <linux/slab.h>
61#include <net/sock.h>
62#include <net/net_namespace.h>
63
64
65
66
67
68
69#define MAX_NFRAMES 256
70
71
72#define BCM_TIMER_SEC_MAX (400 * 24 * 60 * 60)
73
74
75#define RX_RECV 0x40
76#define RX_THR 0x80
77#define BCM_CAN_FLAGS_MASK 0x3F
78
79
80#define REGMASK(id) ((id & CAN_EFF_FLAG) ? \
81 (CAN_EFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG) : \
82 (CAN_SFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG))
83
84MODULE_DESCRIPTION("PF_CAN broadcast manager protocol");
85MODULE_LICENSE("Dual BSD/GPL");
86MODULE_AUTHOR("Oliver Hartkopp <oliver.hartkopp@volkswagen.de>");
87MODULE_ALIAS("can-proto-2");
88
89#define BCM_MIN_NAMELEN CAN_REQUIRED_SIZE(struct sockaddr_can, can_ifindex)
90
91
92
93
94
95
96static inline u64 get_u64(const struct canfd_frame *cp, int offset)
97{
98 return *(u64 *)(cp->data + offset);
99}
100
101struct bcm_op {
102 struct list_head list;
103 int ifindex;
104 canid_t can_id;
105 u32 flags;
106 unsigned long frames_abs, frames_filtered;
107 struct bcm_timeval ival1, ival2;
108 struct hrtimer timer, thrtimer;
109 ktime_t rx_stamp, kt_ival1, kt_ival2, kt_lastmsg;
110 int rx_ifindex;
111 int cfsiz;
112 u32 count;
113 u32 nframes;
114 u32 currframe;
115
116 void *frames;
117 void *last_frames;
118 struct canfd_frame sframe;
119 struct canfd_frame last_sframe;
120 struct sock *sk;
121 struct net_device *rx_reg_dev;
122};
123
124struct bcm_sock {
125 struct sock sk;
126 int bound;
127 int ifindex;
128 struct list_head notifier;
129 struct list_head rx_ops;
130 struct list_head tx_ops;
131 unsigned long dropped_usr_msgs;
132 struct proc_dir_entry *bcm_proc_read;
133 char procname [32];
134};
135
136static LIST_HEAD(bcm_notifier_list);
137static DEFINE_SPINLOCK(bcm_notifier_lock);
138static struct bcm_sock *bcm_busy_notifier;
139
140static inline struct bcm_sock *bcm_sk(const struct sock *sk)
141{
142 return (struct bcm_sock *)sk;
143}
144
145static inline ktime_t bcm_timeval_to_ktime(struct bcm_timeval tv)
146{
147 return ktime_set(tv.tv_sec, tv.tv_usec * NSEC_PER_USEC);
148}
149
150
151static bool bcm_is_invalid_tv(struct bcm_msg_head *msg_head)
152{
153 if ((msg_head->ival1.tv_sec < 0) ||
154 (msg_head->ival1.tv_sec > BCM_TIMER_SEC_MAX) ||
155 (msg_head->ival1.tv_usec < 0) ||
156 (msg_head->ival1.tv_usec >= USEC_PER_SEC) ||
157 (msg_head->ival2.tv_sec < 0) ||
158 (msg_head->ival2.tv_sec > BCM_TIMER_SEC_MAX) ||
159 (msg_head->ival2.tv_usec < 0) ||
160 (msg_head->ival2.tv_usec >= USEC_PER_SEC))
161 return true;
162
163 return false;
164}
165
166#define CFSIZ(flags) ((flags & CAN_FD_FRAME) ? CANFD_MTU : CAN_MTU)
167#define OPSIZ sizeof(struct bcm_op)
168#define MHSIZ sizeof(struct bcm_msg_head)
169
170
171
172
173#if IS_ENABLED(CONFIG_PROC_FS)
174static char *bcm_proc_getifname(struct net *net, char *result, int ifindex)
175{
176 struct net_device *dev;
177
178 if (!ifindex)
179 return "any";
180
181 rcu_read_lock();
182 dev = dev_get_by_index_rcu(net, ifindex);
183 if (dev)
184 strcpy(result, dev->name);
185 else
186 strcpy(result, "???");
187 rcu_read_unlock();
188
189 return result;
190}
191
192static int bcm_proc_show(struct seq_file *m, void *v)
193{
194 char ifname[IFNAMSIZ];
195 struct net *net = m->private;
196 struct sock *sk = (struct sock *)pde_data(m->file->f_inode);
197 struct bcm_sock *bo = bcm_sk(sk);
198 struct bcm_op *op;
199
200 seq_printf(m, ">>> socket %pK", sk->sk_socket);
201 seq_printf(m, " / sk %pK", sk);
202 seq_printf(m, " / bo %pK", bo);
203 seq_printf(m, " / dropped %lu", bo->dropped_usr_msgs);
204 seq_printf(m, " / bound %s", bcm_proc_getifname(net, ifname, bo->ifindex));
205 seq_printf(m, " <<<\n");
206
207 list_for_each_entry(op, &bo->rx_ops, list) {
208
209 unsigned long reduction;
210
211
212 if (!op->frames_abs)
213 continue;
214
215 seq_printf(m, "rx_op: %03X %-5s ", op->can_id,
216 bcm_proc_getifname(net, ifname, op->ifindex));
217
218 if (op->flags & CAN_FD_FRAME)
219 seq_printf(m, "(%u)", op->nframes);
220 else
221 seq_printf(m, "[%u]", op->nframes);
222
223 seq_printf(m, "%c ", (op->flags & RX_CHECK_DLC) ? 'd' : ' ');
224
225 if (op->kt_ival1)
226 seq_printf(m, "timeo=%lld ",
227 (long long)ktime_to_us(op->kt_ival1));
228
229 if (op->kt_ival2)
230 seq_printf(m, "thr=%lld ",
231 (long long)ktime_to_us(op->kt_ival2));
232
233 seq_printf(m, "# recv %ld (%ld) => reduction: ",
234 op->frames_filtered, op->frames_abs);
235
236 reduction = 100 - (op->frames_filtered * 100) / op->frames_abs;
237
238 seq_printf(m, "%s%ld%%\n",
239 (reduction == 100) ? "near " : "", reduction);
240 }
241
242 list_for_each_entry(op, &bo->tx_ops, list) {
243
244 seq_printf(m, "tx_op: %03X %s ", op->can_id,
245 bcm_proc_getifname(net, ifname, op->ifindex));
246
247 if (op->flags & CAN_FD_FRAME)
248 seq_printf(m, "(%u) ", op->nframes);
249 else
250 seq_printf(m, "[%u] ", op->nframes);
251
252 if (op->kt_ival1)
253 seq_printf(m, "t1=%lld ",
254 (long long)ktime_to_us(op->kt_ival1));
255
256 if (op->kt_ival2)
257 seq_printf(m, "t2=%lld ",
258 (long long)ktime_to_us(op->kt_ival2));
259
260 seq_printf(m, "# sent %ld\n", op->frames_abs);
261 }
262 seq_putc(m, '\n');
263 return 0;
264}
265#endif
266
267
268
269
270
271static void bcm_can_tx(struct bcm_op *op)
272{
273 struct sk_buff *skb;
274 struct net_device *dev;
275 struct canfd_frame *cf = op->frames + op->cfsiz * op->currframe;
276
277
278 if (!op->ifindex)
279 return;
280
281 dev = dev_get_by_index(sock_net(op->sk), op->ifindex);
282 if (!dev) {
283
284 return;
285 }
286
287 skb = alloc_skb(op->cfsiz + sizeof(struct can_skb_priv), gfp_any());
288 if (!skb)
289 goto out;
290
291 can_skb_reserve(skb);
292 can_skb_prv(skb)->ifindex = dev->ifindex;
293 can_skb_prv(skb)->skbcnt = 0;
294
295 skb_put_data(skb, cf, op->cfsiz);
296
297
298 skb->dev = dev;
299 can_skb_set_owner(skb, op->sk);
300 can_send(skb, 1);
301
302
303 op->currframe++;
304 op->frames_abs++;
305
306
307 if (op->currframe >= op->nframes)
308 op->currframe = 0;
309out:
310 dev_put(dev);
311}
312
313
314
315
316
317static void bcm_send_to_user(struct bcm_op *op, struct bcm_msg_head *head,
318 struct canfd_frame *frames, int has_timestamp)
319{
320 struct sk_buff *skb;
321 struct canfd_frame *firstframe;
322 struct sockaddr_can *addr;
323 struct sock *sk = op->sk;
324 unsigned int datalen = head->nframes * op->cfsiz;
325 int err;
326
327 skb = alloc_skb(sizeof(*head) + datalen, gfp_any());
328 if (!skb)
329 return;
330
331 skb_put_data(skb, head, sizeof(*head));
332
333 if (head->nframes) {
334
335 firstframe = (struct canfd_frame *)skb_tail_pointer(skb);
336
337 skb_put_data(skb, frames, datalen);
338
339
340
341
342
343
344
345 if (head->nframes == 1)
346 firstframe->flags &= BCM_CAN_FLAGS_MASK;
347 }
348
349 if (has_timestamp) {
350
351 skb->tstamp = op->rx_stamp;
352 }
353
354
355
356
357
358
359
360
361 sock_skb_cb_check_size(sizeof(struct sockaddr_can));
362 addr = (struct sockaddr_can *)skb->cb;
363 memset(addr, 0, sizeof(*addr));
364 addr->can_family = AF_CAN;
365 addr->can_ifindex = op->rx_ifindex;
366
367 err = sock_queue_rcv_skb(sk, skb);
368 if (err < 0) {
369 struct bcm_sock *bo = bcm_sk(sk);
370
371 kfree_skb(skb);
372
373 bo->dropped_usr_msgs++;
374 }
375}
376
377static bool bcm_tx_set_expiry(struct bcm_op *op, struct hrtimer *hrt)
378{
379 ktime_t ival;
380
381 if (op->kt_ival1 && op->count)
382 ival = op->kt_ival1;
383 else if (op->kt_ival2)
384 ival = op->kt_ival2;
385 else
386 return false;
387
388 hrtimer_set_expires(hrt, ktime_add(ktime_get(), ival));
389 return true;
390}
391
392static void bcm_tx_start_timer(struct bcm_op *op)
393{
394 if (bcm_tx_set_expiry(op, &op->timer))
395 hrtimer_start_expires(&op->timer, HRTIMER_MODE_ABS_SOFT);
396}
397
398
399static enum hrtimer_restart bcm_tx_timeout_handler(struct hrtimer *hrtimer)
400{
401 struct bcm_op *op = container_of(hrtimer, struct bcm_op, timer);
402 struct bcm_msg_head msg_head;
403
404 if (op->kt_ival1 && (op->count > 0)) {
405 op->count--;
406 if (!op->count && (op->flags & TX_COUNTEVT)) {
407
408
409 memset(&msg_head, 0, sizeof(msg_head));
410 msg_head.opcode = TX_EXPIRED;
411 msg_head.flags = op->flags;
412 msg_head.count = op->count;
413 msg_head.ival1 = op->ival1;
414 msg_head.ival2 = op->ival2;
415 msg_head.can_id = op->can_id;
416 msg_head.nframes = 0;
417
418 bcm_send_to_user(op, &msg_head, NULL, 0);
419 }
420 bcm_can_tx(op);
421
422 } else if (op->kt_ival2) {
423 bcm_can_tx(op);
424 }
425
426 return bcm_tx_set_expiry(op, &op->timer) ?
427 HRTIMER_RESTART : HRTIMER_NORESTART;
428}
429
430
431
432
433static void bcm_rx_changed(struct bcm_op *op, struct canfd_frame *data)
434{
435 struct bcm_msg_head head;
436
437
438 op->frames_filtered++;
439
440
441 if (op->frames_filtered > ULONG_MAX/100)
442 op->frames_filtered = op->frames_abs = 0;
443
444
445 data->flags &= (BCM_CAN_FLAGS_MASK|RX_RECV);
446
447 memset(&head, 0, sizeof(head));
448 head.opcode = RX_CHANGED;
449 head.flags = op->flags;
450 head.count = op->count;
451 head.ival1 = op->ival1;
452 head.ival2 = op->ival2;
453 head.can_id = op->can_id;
454 head.nframes = 1;
455
456 bcm_send_to_user(op, &head, data, 1);
457}
458
459
460
461
462
463
464static void bcm_rx_update_and_send(struct bcm_op *op,
465 struct canfd_frame *lastdata,
466 const struct canfd_frame *rxdata)
467{
468 memcpy(lastdata, rxdata, op->cfsiz);
469
470
471 lastdata->flags |= (RX_RECV|RX_THR);
472
473
474 if (!op->kt_ival2) {
475
476 bcm_rx_changed(op, lastdata);
477 return;
478 }
479
480
481 if (hrtimer_active(&op->thrtimer))
482 return;
483
484
485 if (!op->kt_lastmsg)
486 goto rx_changed_settime;
487
488
489 if (ktime_us_delta(ktime_get(), op->kt_lastmsg) <
490 ktime_to_us(op->kt_ival2)) {
491
492 hrtimer_start(&op->thrtimer,
493 ktime_add(op->kt_lastmsg, op->kt_ival2),
494 HRTIMER_MODE_ABS_SOFT);
495 return;
496 }
497
498
499rx_changed_settime:
500 bcm_rx_changed(op, lastdata);
501 op->kt_lastmsg = ktime_get();
502}
503
504
505
506
507
508static void bcm_rx_cmp_to_index(struct bcm_op *op, unsigned int index,
509 const struct canfd_frame *rxdata)
510{
511 struct canfd_frame *cf = op->frames + op->cfsiz * index;
512 struct canfd_frame *lcf = op->last_frames + op->cfsiz * index;
513 int i;
514
515
516
517
518
519
520 if (!(lcf->flags & RX_RECV)) {
521
522 bcm_rx_update_and_send(op, lcf, rxdata);
523 return;
524 }
525
526
527 for (i = 0; i < rxdata->len; i += 8) {
528 if ((get_u64(cf, i) & get_u64(rxdata, i)) !=
529 (get_u64(cf, i) & get_u64(lcf, i))) {
530 bcm_rx_update_and_send(op, lcf, rxdata);
531 return;
532 }
533 }
534
535 if (op->flags & RX_CHECK_DLC) {
536
537 if (rxdata->len != lcf->len) {
538 bcm_rx_update_and_send(op, lcf, rxdata);
539 return;
540 }
541 }
542}
543
544
545
546
547static void bcm_rx_starttimer(struct bcm_op *op)
548{
549 if (op->flags & RX_NO_AUTOTIMER)
550 return;
551
552 if (op->kt_ival1)
553 hrtimer_start(&op->timer, op->kt_ival1, HRTIMER_MODE_REL_SOFT);
554}
555
556
557static enum hrtimer_restart bcm_rx_timeout_handler(struct hrtimer *hrtimer)
558{
559 struct bcm_op *op = container_of(hrtimer, struct bcm_op, timer);
560 struct bcm_msg_head msg_head;
561
562
563 if ((op->flags & RX_ANNOUNCE_RESUME) && op->last_frames) {
564
565 memset(op->last_frames, 0, op->nframes * op->cfsiz);
566 }
567
568
569 memset(&msg_head, 0, sizeof(msg_head));
570 msg_head.opcode = RX_TIMEOUT;
571 msg_head.flags = op->flags;
572 msg_head.count = op->count;
573 msg_head.ival1 = op->ival1;
574 msg_head.ival2 = op->ival2;
575 msg_head.can_id = op->can_id;
576 msg_head.nframes = 0;
577
578 bcm_send_to_user(op, &msg_head, NULL, 0);
579
580 return HRTIMER_NORESTART;
581}
582
583
584
585
586static inline int bcm_rx_do_flush(struct bcm_op *op, unsigned int index)
587{
588 struct canfd_frame *lcf = op->last_frames + op->cfsiz * index;
589
590 if ((op->last_frames) && (lcf->flags & RX_THR)) {
591 bcm_rx_changed(op, lcf);
592 return 1;
593 }
594 return 0;
595}
596
597
598
599
600static int bcm_rx_thr_flush(struct bcm_op *op)
601{
602 int updated = 0;
603
604 if (op->nframes > 1) {
605 unsigned int i;
606
607
608 for (i = 1; i < op->nframes; i++)
609 updated += bcm_rx_do_flush(op, i);
610
611 } else {
612
613 updated += bcm_rx_do_flush(op, 0);
614 }
615
616 return updated;
617}
618
619
620
621
622
623static enum hrtimer_restart bcm_rx_thr_handler(struct hrtimer *hrtimer)
624{
625 struct bcm_op *op = container_of(hrtimer, struct bcm_op, thrtimer);
626
627 if (bcm_rx_thr_flush(op)) {
628 hrtimer_forward_now(hrtimer, op->kt_ival2);
629 return HRTIMER_RESTART;
630 } else {
631
632 op->kt_lastmsg = 0;
633 return HRTIMER_NORESTART;
634 }
635}
636
637
638
639
640static void bcm_rx_handler(struct sk_buff *skb, void *data)
641{
642 struct bcm_op *op = (struct bcm_op *)data;
643 const struct canfd_frame *rxframe = (struct canfd_frame *)skb->data;
644 unsigned int i;
645
646 if (op->can_id != rxframe->can_id)
647 return;
648
649
650 if (skb->len != op->cfsiz)
651 return;
652
653
654 hrtimer_cancel(&op->timer);
655
656
657 op->rx_stamp = skb->tstamp;
658
659 op->rx_ifindex = skb->dev->ifindex;
660
661 op->frames_abs++;
662
663 if (op->flags & RX_RTR_FRAME) {
664
665 bcm_can_tx(op);
666 return;
667 }
668
669 if (op->flags & RX_FILTER_ID) {
670
671 bcm_rx_update_and_send(op, op->last_frames, rxframe);
672 goto rx_starttimer;
673 }
674
675 if (op->nframes == 1) {
676
677 bcm_rx_cmp_to_index(op, 0, rxframe);
678 goto rx_starttimer;
679 }
680
681 if (op->nframes > 1) {
682
683
684
685
686
687
688
689
690 for (i = 1; i < op->nframes; i++) {
691 if ((get_u64(op->frames, 0) & get_u64(rxframe, 0)) ==
692 (get_u64(op->frames, 0) &
693 get_u64(op->frames + op->cfsiz * i, 0))) {
694 bcm_rx_cmp_to_index(op, i, rxframe);
695 break;
696 }
697 }
698 }
699
700rx_starttimer:
701 bcm_rx_starttimer(op);
702}
703
704
705
706
707static struct bcm_op *bcm_find_op(struct list_head *ops,
708 struct bcm_msg_head *mh, int ifindex)
709{
710 struct bcm_op *op;
711
712 list_for_each_entry(op, ops, list) {
713 if ((op->can_id == mh->can_id) && (op->ifindex == ifindex) &&
714 (op->flags & CAN_FD_FRAME) == (mh->flags & CAN_FD_FRAME))
715 return op;
716 }
717
718 return NULL;
719}
720
721static void bcm_remove_op(struct bcm_op *op)
722{
723 hrtimer_cancel(&op->timer);
724 hrtimer_cancel(&op->thrtimer);
725
726 if ((op->frames) && (op->frames != &op->sframe))
727 kfree(op->frames);
728
729 if ((op->last_frames) && (op->last_frames != &op->last_sframe))
730 kfree(op->last_frames);
731
732 kfree(op);
733}
734
735static void bcm_rx_unreg(struct net_device *dev, struct bcm_op *op)
736{
737 if (op->rx_reg_dev == dev) {
738 can_rx_unregister(dev_net(dev), dev, op->can_id,
739 REGMASK(op->can_id), bcm_rx_handler, op);
740
741
742 op->rx_reg_dev = NULL;
743 } else
744 printk(KERN_ERR "can-bcm: bcm_rx_unreg: registered device "
745 "mismatch %p %p\n", op->rx_reg_dev, dev);
746}
747
748
749
750
751static int bcm_delete_rx_op(struct list_head *ops, struct bcm_msg_head *mh,
752 int ifindex)
753{
754 struct bcm_op *op, *n;
755
756 list_for_each_entry_safe(op, n, ops, list) {
757 if ((op->can_id == mh->can_id) && (op->ifindex == ifindex) &&
758 (op->flags & CAN_FD_FRAME) == (mh->flags & CAN_FD_FRAME)) {
759
760
761
762
763
764
765 if (op->ifindex) {
766
767
768
769
770
771 if (op->rx_reg_dev) {
772 struct net_device *dev;
773
774 dev = dev_get_by_index(sock_net(op->sk),
775 op->ifindex);
776 if (dev) {
777 bcm_rx_unreg(dev, op);
778 dev_put(dev);
779 }
780 }
781 } else
782 can_rx_unregister(sock_net(op->sk), NULL,
783 op->can_id,
784 REGMASK(op->can_id),
785 bcm_rx_handler, op);
786
787 list_del(&op->list);
788 synchronize_rcu();
789 bcm_remove_op(op);
790 return 1;
791 }
792 }
793
794 return 0;
795}
796
797
798
799
800static int bcm_delete_tx_op(struct list_head *ops, struct bcm_msg_head *mh,
801 int ifindex)
802{
803 struct bcm_op *op, *n;
804
805 list_for_each_entry_safe(op, n, ops, list) {
806 if ((op->can_id == mh->can_id) && (op->ifindex == ifindex) &&
807 (op->flags & CAN_FD_FRAME) == (mh->flags & CAN_FD_FRAME)) {
808 list_del(&op->list);
809 bcm_remove_op(op);
810 return 1;
811 }
812 }
813
814 return 0;
815}
816
817
818
819
820static int bcm_read_op(struct list_head *ops, struct bcm_msg_head *msg_head,
821 int ifindex)
822{
823 struct bcm_op *op = bcm_find_op(ops, msg_head, ifindex);
824
825 if (!op)
826 return -EINVAL;
827
828
829 msg_head->flags = op->flags;
830 msg_head->count = op->count;
831 msg_head->ival1 = op->ival1;
832 msg_head->ival2 = op->ival2;
833 msg_head->nframes = op->nframes;
834
835 bcm_send_to_user(op, msg_head, op->frames, 0);
836
837 return MHSIZ;
838}
839
840
841
842
843static int bcm_tx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
844 int ifindex, struct sock *sk)
845{
846 struct bcm_sock *bo = bcm_sk(sk);
847 struct bcm_op *op;
848 struct canfd_frame *cf;
849 unsigned int i;
850 int err;
851
852
853 if (!ifindex)
854 return -ENODEV;
855
856
857 if (msg_head->nframes < 1 || msg_head->nframes > MAX_NFRAMES)
858 return -EINVAL;
859
860
861 if ((msg_head->flags & SETTIMER) && bcm_is_invalid_tv(msg_head))
862 return -EINVAL;
863
864
865 op = bcm_find_op(&bo->tx_ops, msg_head, ifindex);
866 if (op) {
867
868
869
870
871
872
873
874 if (msg_head->nframes > op->nframes)
875 return -E2BIG;
876
877
878 for (i = 0; i < msg_head->nframes; i++) {
879
880 cf = op->frames + op->cfsiz * i;
881 err = memcpy_from_msg((u8 *)cf, msg, op->cfsiz);
882
883 if (op->flags & CAN_FD_FRAME) {
884 if (cf->len > 64)
885 err = -EINVAL;
886 } else {
887 if (cf->len > 8)
888 err = -EINVAL;
889 }
890
891 if (err < 0)
892 return err;
893
894 if (msg_head->flags & TX_CP_CAN_ID) {
895
896 cf->can_id = msg_head->can_id;
897 }
898 }
899 op->flags = msg_head->flags;
900
901 } else {
902
903
904 op = kzalloc(OPSIZ, GFP_KERNEL);
905 if (!op)
906 return -ENOMEM;
907
908 op->can_id = msg_head->can_id;
909 op->cfsiz = CFSIZ(msg_head->flags);
910 op->flags = msg_head->flags;
911
912
913 if (msg_head->nframes > 1) {
914 op->frames = kmalloc_array(msg_head->nframes,
915 op->cfsiz,
916 GFP_KERNEL);
917 if (!op->frames) {
918 kfree(op);
919 return -ENOMEM;
920 }
921 } else
922 op->frames = &op->sframe;
923
924 for (i = 0; i < msg_head->nframes; i++) {
925
926 cf = op->frames + op->cfsiz * i;
927 err = memcpy_from_msg((u8 *)cf, msg, op->cfsiz);
928
929 if (op->flags & CAN_FD_FRAME) {
930 if (cf->len > 64)
931 err = -EINVAL;
932 } else {
933 if (cf->len > 8)
934 err = -EINVAL;
935 }
936
937 if (err < 0) {
938 if (op->frames != &op->sframe)
939 kfree(op->frames);
940 kfree(op);
941 return err;
942 }
943
944 if (msg_head->flags & TX_CP_CAN_ID) {
945
946 cf->can_id = msg_head->can_id;
947 }
948 }
949
950
951 op->last_frames = NULL;
952
953
954 op->sk = sk;
955 op->ifindex = ifindex;
956
957
958 hrtimer_init(&op->timer, CLOCK_MONOTONIC,
959 HRTIMER_MODE_REL_SOFT);
960 op->timer.function = bcm_tx_timeout_handler;
961
962
963 hrtimer_init(&op->thrtimer, CLOCK_MONOTONIC,
964 HRTIMER_MODE_REL_SOFT);
965
966
967 list_add(&op->list, &bo->tx_ops);
968
969 }
970
971 if (op->nframes != msg_head->nframes) {
972 op->nframes = msg_head->nframes;
973
974 op->currframe = 0;
975 }
976
977
978
979 if (op->flags & TX_RESET_MULTI_IDX) {
980
981 op->currframe = 0;
982 }
983
984 if (op->flags & SETTIMER) {
985
986 op->count = msg_head->count;
987 op->ival1 = msg_head->ival1;
988 op->ival2 = msg_head->ival2;
989 op->kt_ival1 = bcm_timeval_to_ktime(msg_head->ival1);
990 op->kt_ival2 = bcm_timeval_to_ktime(msg_head->ival2);
991
992
993 if (!op->kt_ival1 && !op->kt_ival2)
994 hrtimer_cancel(&op->timer);
995 }
996
997 if (op->flags & STARTTIMER) {
998 hrtimer_cancel(&op->timer);
999
1000 op->flags |= TX_ANNOUNCE;
1001 }
1002
1003 if (op->flags & TX_ANNOUNCE) {
1004 bcm_can_tx(op);
1005 if (op->count)
1006 op->count--;
1007 }
1008
1009 if (op->flags & STARTTIMER)
1010 bcm_tx_start_timer(op);
1011
1012 return msg_head->nframes * op->cfsiz + MHSIZ;
1013}
1014
1015
1016
1017
1018static int bcm_rx_setup(struct bcm_msg_head *msg_head, struct msghdr *msg,
1019 int ifindex, struct sock *sk)
1020{
1021 struct bcm_sock *bo = bcm_sk(sk);
1022 struct bcm_op *op;
1023 int do_rx_register;
1024 int err = 0;
1025
1026 if ((msg_head->flags & RX_FILTER_ID) || (!(msg_head->nframes))) {
1027
1028 msg_head->flags |= RX_FILTER_ID;
1029
1030 msg_head->nframes = 0;
1031 }
1032
1033
1034 if (msg_head->nframes > MAX_NFRAMES + 1)
1035 return -EINVAL;
1036
1037 if ((msg_head->flags & RX_RTR_FRAME) &&
1038 ((msg_head->nframes != 1) ||
1039 (!(msg_head->can_id & CAN_RTR_FLAG))))
1040 return -EINVAL;
1041
1042
1043 if ((msg_head->flags & SETTIMER) && bcm_is_invalid_tv(msg_head))
1044 return -EINVAL;
1045
1046
1047 op = bcm_find_op(&bo->rx_ops, msg_head, ifindex);
1048 if (op) {
1049
1050
1051
1052
1053
1054
1055
1056 if (msg_head->nframes > op->nframes)
1057 return -E2BIG;
1058
1059 if (msg_head->nframes) {
1060
1061 err = memcpy_from_msg(op->frames, msg,
1062 msg_head->nframes * op->cfsiz);
1063 if (err < 0)
1064 return err;
1065
1066
1067 memset(op->last_frames, 0, msg_head->nframes * op->cfsiz);
1068 }
1069
1070 op->nframes = msg_head->nframes;
1071 op->flags = msg_head->flags;
1072
1073
1074 do_rx_register = 0;
1075
1076 } else {
1077
1078 op = kzalloc(OPSIZ, GFP_KERNEL);
1079 if (!op)
1080 return -ENOMEM;
1081
1082 op->can_id = msg_head->can_id;
1083 op->nframes = msg_head->nframes;
1084 op->cfsiz = CFSIZ(msg_head->flags);
1085 op->flags = msg_head->flags;
1086
1087 if (msg_head->nframes > 1) {
1088
1089 op->frames = kmalloc_array(msg_head->nframes,
1090 op->cfsiz,
1091 GFP_KERNEL);
1092 if (!op->frames) {
1093 kfree(op);
1094 return -ENOMEM;
1095 }
1096
1097
1098 op->last_frames = kcalloc(msg_head->nframes,
1099 op->cfsiz,
1100 GFP_KERNEL);
1101 if (!op->last_frames) {
1102 kfree(op->frames);
1103 kfree(op);
1104 return -ENOMEM;
1105 }
1106
1107 } else {
1108 op->frames = &op->sframe;
1109 op->last_frames = &op->last_sframe;
1110 }
1111
1112 if (msg_head->nframes) {
1113 err = memcpy_from_msg(op->frames, msg,
1114 msg_head->nframes * op->cfsiz);
1115 if (err < 0) {
1116 if (op->frames != &op->sframe)
1117 kfree(op->frames);
1118 if (op->last_frames != &op->last_sframe)
1119 kfree(op->last_frames);
1120 kfree(op);
1121 return err;
1122 }
1123 }
1124
1125
1126 op->sk = sk;
1127 op->ifindex = ifindex;
1128
1129
1130 op->rx_ifindex = ifindex;
1131
1132
1133 hrtimer_init(&op->timer, CLOCK_MONOTONIC,
1134 HRTIMER_MODE_REL_SOFT);
1135 op->timer.function = bcm_rx_timeout_handler;
1136
1137 hrtimer_init(&op->thrtimer, CLOCK_MONOTONIC,
1138 HRTIMER_MODE_REL_SOFT);
1139 op->thrtimer.function = bcm_rx_thr_handler;
1140
1141
1142 list_add(&op->list, &bo->rx_ops);
1143
1144
1145 do_rx_register = 1;
1146
1147 }
1148
1149
1150
1151 if (op->flags & RX_RTR_FRAME) {
1152 struct canfd_frame *frame0 = op->frames;
1153
1154
1155 hrtimer_cancel(&op->thrtimer);
1156 hrtimer_cancel(&op->timer);
1157
1158
1159
1160
1161
1162
1163 if ((op->flags & TX_CP_CAN_ID) ||
1164 (frame0->can_id == op->can_id))
1165 frame0->can_id = op->can_id & ~CAN_RTR_FLAG;
1166
1167 } else {
1168 if (op->flags & SETTIMER) {
1169
1170
1171 op->ival1 = msg_head->ival1;
1172 op->ival2 = msg_head->ival2;
1173 op->kt_ival1 = bcm_timeval_to_ktime(msg_head->ival1);
1174 op->kt_ival2 = bcm_timeval_to_ktime(msg_head->ival2);
1175
1176
1177 if (!op->kt_ival1)
1178 hrtimer_cancel(&op->timer);
1179
1180
1181
1182
1183
1184 op->kt_lastmsg = 0;
1185 hrtimer_cancel(&op->thrtimer);
1186 bcm_rx_thr_flush(op);
1187 }
1188
1189 if ((op->flags & STARTTIMER) && op->kt_ival1)
1190 hrtimer_start(&op->timer, op->kt_ival1,
1191 HRTIMER_MODE_REL_SOFT);
1192 }
1193
1194
1195 if (do_rx_register) {
1196 if (ifindex) {
1197 struct net_device *dev;
1198
1199 dev = dev_get_by_index(sock_net(sk), ifindex);
1200 if (dev) {
1201 err = can_rx_register(sock_net(sk), dev,
1202 op->can_id,
1203 REGMASK(op->can_id),
1204 bcm_rx_handler, op,
1205 "bcm", sk);
1206
1207 op->rx_reg_dev = dev;
1208 dev_put(dev);
1209 }
1210
1211 } else
1212 err = can_rx_register(sock_net(sk), NULL, op->can_id,
1213 REGMASK(op->can_id),
1214 bcm_rx_handler, op, "bcm", sk);
1215 if (err) {
1216
1217 list_del(&op->list);
1218 bcm_remove_op(op);
1219 return err;
1220 }
1221 }
1222
1223 return msg_head->nframes * op->cfsiz + MHSIZ;
1224}
1225
1226
1227
1228
1229static int bcm_tx_send(struct msghdr *msg, int ifindex, struct sock *sk,
1230 int cfsiz)
1231{
1232 struct sk_buff *skb;
1233 struct net_device *dev;
1234 int err;
1235
1236
1237 if (!ifindex)
1238 return -ENODEV;
1239
1240 skb = alloc_skb(cfsiz + sizeof(struct can_skb_priv), GFP_KERNEL);
1241 if (!skb)
1242 return -ENOMEM;
1243
1244 can_skb_reserve(skb);
1245
1246 err = memcpy_from_msg(skb_put(skb, cfsiz), msg, cfsiz);
1247 if (err < 0) {
1248 kfree_skb(skb);
1249 return err;
1250 }
1251
1252 dev = dev_get_by_index(sock_net(sk), ifindex);
1253 if (!dev) {
1254 kfree_skb(skb);
1255 return -ENODEV;
1256 }
1257
1258 can_skb_prv(skb)->ifindex = dev->ifindex;
1259 can_skb_prv(skb)->skbcnt = 0;
1260 skb->dev = dev;
1261 can_skb_set_owner(skb, sk);
1262 err = can_send(skb, 1);
1263 dev_put(dev);
1264
1265 if (err)
1266 return err;
1267
1268 return cfsiz + MHSIZ;
1269}
1270
1271
1272
1273
1274static int bcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
1275{
1276 struct sock *sk = sock->sk;
1277 struct bcm_sock *bo = bcm_sk(sk);
1278 int ifindex = bo->ifindex;
1279 struct bcm_msg_head msg_head;
1280 int cfsiz;
1281 int ret;
1282
1283 if (!bo->bound)
1284 return -ENOTCONN;
1285
1286
1287 if (size < MHSIZ)
1288 return -EINVAL;
1289
1290
1291 ret = memcpy_from_msg((u8 *)&msg_head, msg, MHSIZ);
1292 if (ret < 0)
1293 return ret;
1294
1295 cfsiz = CFSIZ(msg_head.flags);
1296 if ((size - MHSIZ) % cfsiz)
1297 return -EINVAL;
1298
1299
1300
1301 if (!ifindex && msg->msg_name) {
1302
1303 DECLARE_SOCKADDR(struct sockaddr_can *, addr, msg->msg_name);
1304
1305 if (msg->msg_namelen < BCM_MIN_NAMELEN)
1306 return -EINVAL;
1307
1308 if (addr->can_family != AF_CAN)
1309 return -EINVAL;
1310
1311
1312 ifindex = addr->can_ifindex;
1313
1314 if (ifindex) {
1315 struct net_device *dev;
1316
1317 dev = dev_get_by_index(sock_net(sk), ifindex);
1318 if (!dev)
1319 return -ENODEV;
1320
1321 if (dev->type != ARPHRD_CAN) {
1322 dev_put(dev);
1323 return -ENODEV;
1324 }
1325
1326 dev_put(dev);
1327 }
1328 }
1329
1330 lock_sock(sk);
1331
1332 switch (msg_head.opcode) {
1333
1334 case TX_SETUP:
1335 ret = bcm_tx_setup(&msg_head, msg, ifindex, sk);
1336 break;
1337
1338 case RX_SETUP:
1339 ret = bcm_rx_setup(&msg_head, msg, ifindex, sk);
1340 break;
1341
1342 case TX_DELETE:
1343 if (bcm_delete_tx_op(&bo->tx_ops, &msg_head, ifindex))
1344 ret = MHSIZ;
1345 else
1346 ret = -EINVAL;
1347 break;
1348
1349 case RX_DELETE:
1350 if (bcm_delete_rx_op(&bo->rx_ops, &msg_head, ifindex))
1351 ret = MHSIZ;
1352 else
1353 ret = -EINVAL;
1354 break;
1355
1356 case TX_READ:
1357
1358 msg_head.opcode = TX_STATUS;
1359 ret = bcm_read_op(&bo->tx_ops, &msg_head, ifindex);
1360 break;
1361
1362 case RX_READ:
1363
1364 msg_head.opcode = RX_STATUS;
1365 ret = bcm_read_op(&bo->rx_ops, &msg_head, ifindex);
1366 break;
1367
1368 case TX_SEND:
1369
1370 if ((msg_head.nframes != 1) || (size != cfsiz + MHSIZ))
1371 ret = -EINVAL;
1372 else
1373 ret = bcm_tx_send(msg, ifindex, sk, cfsiz);
1374 break;
1375
1376 default:
1377 ret = -EINVAL;
1378 break;
1379 }
1380
1381 release_sock(sk);
1382
1383 return ret;
1384}
1385
1386
1387
1388
1389static void bcm_notify(struct bcm_sock *bo, unsigned long msg,
1390 struct net_device *dev)
1391{
1392 struct sock *sk = &bo->sk;
1393 struct bcm_op *op;
1394 int notify_enodev = 0;
1395
1396 if (!net_eq(dev_net(dev), sock_net(sk)))
1397 return;
1398
1399 switch (msg) {
1400
1401 case NETDEV_UNREGISTER:
1402 lock_sock(sk);
1403
1404
1405 list_for_each_entry(op, &bo->rx_ops, list)
1406 if (op->rx_reg_dev == dev)
1407 bcm_rx_unreg(dev, op);
1408
1409
1410 if (bo->bound && bo->ifindex == dev->ifindex) {
1411 bo->bound = 0;
1412 bo->ifindex = 0;
1413 notify_enodev = 1;
1414 }
1415
1416 release_sock(sk);
1417
1418 if (notify_enodev) {
1419 sk->sk_err = ENODEV;
1420 if (!sock_flag(sk, SOCK_DEAD))
1421 sk_error_report(sk);
1422 }
1423 break;
1424
1425 case NETDEV_DOWN:
1426 if (bo->bound && bo->ifindex == dev->ifindex) {
1427 sk->sk_err = ENETDOWN;
1428 if (!sock_flag(sk, SOCK_DEAD))
1429 sk_error_report(sk);
1430 }
1431 }
1432}
1433
1434static int bcm_notifier(struct notifier_block *nb, unsigned long msg,
1435 void *ptr)
1436{
1437 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1438
1439 if (dev->type != ARPHRD_CAN)
1440 return NOTIFY_DONE;
1441 if (msg != NETDEV_UNREGISTER && msg != NETDEV_DOWN)
1442 return NOTIFY_DONE;
1443 if (unlikely(bcm_busy_notifier))
1444 return NOTIFY_DONE;
1445
1446 spin_lock(&bcm_notifier_lock);
1447 list_for_each_entry(bcm_busy_notifier, &bcm_notifier_list, notifier) {
1448 spin_unlock(&bcm_notifier_lock);
1449 bcm_notify(bcm_busy_notifier, msg, dev);
1450 spin_lock(&bcm_notifier_lock);
1451 }
1452 bcm_busy_notifier = NULL;
1453 spin_unlock(&bcm_notifier_lock);
1454 return NOTIFY_DONE;
1455}
1456
1457
1458
1459
1460static int bcm_init(struct sock *sk)
1461{
1462 struct bcm_sock *bo = bcm_sk(sk);
1463
1464 bo->bound = 0;
1465 bo->ifindex = 0;
1466 bo->dropped_usr_msgs = 0;
1467 bo->bcm_proc_read = NULL;
1468
1469 INIT_LIST_HEAD(&bo->tx_ops);
1470 INIT_LIST_HEAD(&bo->rx_ops);
1471
1472
1473 spin_lock(&bcm_notifier_lock);
1474 list_add_tail(&bo->notifier, &bcm_notifier_list);
1475 spin_unlock(&bcm_notifier_lock);
1476
1477 return 0;
1478}
1479
1480
1481
1482
1483static int bcm_release(struct socket *sock)
1484{
1485 struct sock *sk = sock->sk;
1486 struct net *net;
1487 struct bcm_sock *bo;
1488 struct bcm_op *op, *next;
1489
1490 if (!sk)
1491 return 0;
1492
1493 net = sock_net(sk);
1494 bo = bcm_sk(sk);
1495
1496
1497
1498 spin_lock(&bcm_notifier_lock);
1499 while (bcm_busy_notifier == bo) {
1500 spin_unlock(&bcm_notifier_lock);
1501 schedule_timeout_uninterruptible(1);
1502 spin_lock(&bcm_notifier_lock);
1503 }
1504 list_del(&bo->notifier);
1505 spin_unlock(&bcm_notifier_lock);
1506
1507 lock_sock(sk);
1508
1509 list_for_each_entry_safe(op, next, &bo->tx_ops, list)
1510 bcm_remove_op(op);
1511
1512 list_for_each_entry_safe(op, next, &bo->rx_ops, list) {
1513
1514
1515
1516
1517 if (op->ifindex) {
1518
1519
1520
1521
1522
1523 if (op->rx_reg_dev) {
1524 struct net_device *dev;
1525
1526 dev = dev_get_by_index(net, op->ifindex);
1527 if (dev) {
1528 bcm_rx_unreg(dev, op);
1529 dev_put(dev);
1530 }
1531 }
1532 } else
1533 can_rx_unregister(net, NULL, op->can_id,
1534 REGMASK(op->can_id),
1535 bcm_rx_handler, op);
1536
1537 }
1538
1539 synchronize_rcu();
1540
1541 list_for_each_entry_safe(op, next, &bo->rx_ops, list)
1542 bcm_remove_op(op);
1543
1544#if IS_ENABLED(CONFIG_PROC_FS)
1545
1546 if (net->can.bcmproc_dir && bo->bcm_proc_read)
1547 remove_proc_entry(bo->procname, net->can.bcmproc_dir);
1548#endif
1549
1550
1551 if (bo->bound) {
1552 bo->bound = 0;
1553 bo->ifindex = 0;
1554 }
1555
1556 sock_orphan(sk);
1557 sock->sk = NULL;
1558
1559 release_sock(sk);
1560 sock_put(sk);
1561
1562 return 0;
1563}
1564
1565static int bcm_connect(struct socket *sock, struct sockaddr *uaddr, int len,
1566 int flags)
1567{
1568 struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
1569 struct sock *sk = sock->sk;
1570 struct bcm_sock *bo = bcm_sk(sk);
1571 struct net *net = sock_net(sk);
1572 int ret = 0;
1573
1574 if (len < BCM_MIN_NAMELEN)
1575 return -EINVAL;
1576
1577 lock_sock(sk);
1578
1579 if (bo->bound) {
1580 ret = -EISCONN;
1581 goto fail;
1582 }
1583
1584
1585 if (addr->can_ifindex) {
1586 struct net_device *dev;
1587
1588 dev = dev_get_by_index(net, addr->can_ifindex);
1589 if (!dev) {
1590 ret = -ENODEV;
1591 goto fail;
1592 }
1593 if (dev->type != ARPHRD_CAN) {
1594 dev_put(dev);
1595 ret = -ENODEV;
1596 goto fail;
1597 }
1598
1599 bo->ifindex = dev->ifindex;
1600 dev_put(dev);
1601
1602 } else {
1603
1604 bo->ifindex = 0;
1605 }
1606
1607#if IS_ENABLED(CONFIG_PROC_FS)
1608 if (net->can.bcmproc_dir) {
1609
1610 sprintf(bo->procname, "%lu", sock_i_ino(sk));
1611 bo->bcm_proc_read = proc_create_net_single(bo->procname, 0644,
1612 net->can.bcmproc_dir,
1613 bcm_proc_show, sk);
1614 if (!bo->bcm_proc_read) {
1615 ret = -ENOMEM;
1616 goto fail;
1617 }
1618 }
1619#endif
1620
1621 bo->bound = 1;
1622
1623fail:
1624 release_sock(sk);
1625
1626 return ret;
1627}
1628
1629static int bcm_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1630 int flags)
1631{
1632 struct sock *sk = sock->sk;
1633 struct sk_buff *skb;
1634 int error = 0;
1635 int noblock;
1636 int err;
1637
1638 noblock = flags & MSG_DONTWAIT;
1639 flags &= ~MSG_DONTWAIT;
1640 skb = skb_recv_datagram(sk, flags, noblock, &error);
1641 if (!skb)
1642 return error;
1643
1644 if (skb->len < size)
1645 size = skb->len;
1646
1647 err = memcpy_to_msg(msg, skb->data, size);
1648 if (err < 0) {
1649 skb_free_datagram(sk, skb);
1650 return err;
1651 }
1652
1653 sock_recv_ts_and_drops(msg, sk, skb);
1654
1655 if (msg->msg_name) {
1656 __sockaddr_check_size(BCM_MIN_NAMELEN);
1657 msg->msg_namelen = BCM_MIN_NAMELEN;
1658 memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
1659 }
1660
1661 skb_free_datagram(sk, skb);
1662
1663 return size;
1664}
1665
1666static int bcm_sock_no_ioctlcmd(struct socket *sock, unsigned int cmd,
1667 unsigned long arg)
1668{
1669
1670 return -ENOIOCTLCMD;
1671}
1672
1673static const struct proto_ops bcm_ops = {
1674 .family = PF_CAN,
1675 .release = bcm_release,
1676 .bind = sock_no_bind,
1677 .connect = bcm_connect,
1678 .socketpair = sock_no_socketpair,
1679 .accept = sock_no_accept,
1680 .getname = sock_no_getname,
1681 .poll = datagram_poll,
1682 .ioctl = bcm_sock_no_ioctlcmd,
1683 .gettstamp = sock_gettstamp,
1684 .listen = sock_no_listen,
1685 .shutdown = sock_no_shutdown,
1686 .sendmsg = bcm_sendmsg,
1687 .recvmsg = bcm_recvmsg,
1688 .mmap = sock_no_mmap,
1689 .sendpage = sock_no_sendpage,
1690};
1691
1692static struct proto bcm_proto __read_mostly = {
1693 .name = "CAN_BCM",
1694 .owner = THIS_MODULE,
1695 .obj_size = sizeof(struct bcm_sock),
1696 .init = bcm_init,
1697};
1698
1699static const struct can_proto bcm_can_proto = {
1700 .type = SOCK_DGRAM,
1701 .protocol = CAN_BCM,
1702 .ops = &bcm_ops,
1703 .prot = &bcm_proto,
1704};
1705
1706static int canbcm_pernet_init(struct net *net)
1707{
1708#if IS_ENABLED(CONFIG_PROC_FS)
1709
1710 net->can.bcmproc_dir = proc_net_mkdir(net, "can-bcm", net->proc_net);
1711#endif
1712
1713 return 0;
1714}
1715
1716static void canbcm_pernet_exit(struct net *net)
1717{
1718#if IS_ENABLED(CONFIG_PROC_FS)
1719
1720 if (net->can.bcmproc_dir)
1721 remove_proc_entry("can-bcm", net->proc_net);
1722#endif
1723}
1724
1725static struct pernet_operations canbcm_pernet_ops __read_mostly = {
1726 .init = canbcm_pernet_init,
1727 .exit = canbcm_pernet_exit,
1728};
1729
1730static struct notifier_block canbcm_notifier = {
1731 .notifier_call = bcm_notifier
1732};
1733
1734static int __init bcm_module_init(void)
1735{
1736 int err;
1737
1738 pr_info("can: broadcast manager protocol\n");
1739
1740 err = can_proto_register(&bcm_can_proto);
1741 if (err < 0) {
1742 printk(KERN_ERR "can: registration of bcm protocol failed\n");
1743 return err;
1744 }
1745
1746 register_pernet_subsys(&canbcm_pernet_ops);
1747 register_netdevice_notifier(&canbcm_notifier);
1748 return 0;
1749}
1750
1751static void __exit bcm_module_exit(void)
1752{
1753 can_proto_unregister(&bcm_can_proto);
1754 unregister_netdevice_notifier(&canbcm_notifier);
1755 unregister_pernet_subsys(&canbcm_pernet_ops);
1756}
1757
1758module_init(bcm_module_init);
1759module_exit(bcm_module_exit);
1760