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1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
25
26#include <net/genetlink.h>
27#include <linux/nfc.h>
28#include <linux/slab.h>
29
30#include "nfc.h"
31
32static struct genl_multicast_group nfc_genl_event_mcgrp = {
33 .name = NFC_GENL_MCAST_EVENT_NAME,
34};
35
36static struct genl_family nfc_genl_family = {
37 .id = GENL_ID_GENERATE,
38 .hdrsize = 0,
39 .name = NFC_GENL_NAME,
40 .version = NFC_GENL_VERSION,
41 .maxattr = NFC_ATTR_MAX,
42};
43
44static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
45 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
46 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
47 .len = NFC_DEVICE_NAME_MAXSIZE },
48 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
49 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
50 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
51 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
52};
53
54static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
55 struct netlink_callback *cb, int flags)
56{
57 void *hdr;
58
59 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
60 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
61 if (!hdr)
62 return -EMSGSIZE;
63
64 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
65
66 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
67 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
68 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
69 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
70 goto nla_put_failure;
71 if (target->nfcid1_len > 0 &&
72 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
73 target->nfcid1))
74 goto nla_put_failure;
75 if (target->sensb_res_len > 0 &&
76 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
77 target->sensb_res))
78 goto nla_put_failure;
79 if (target->sensf_res_len > 0 &&
80 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
81 target->sensf_res))
82 goto nla_put_failure;
83
84 return genlmsg_end(msg, hdr);
85
86nla_put_failure:
87 genlmsg_cancel(msg, hdr);
88 return -EMSGSIZE;
89}
90
91static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
92{
93 struct nfc_dev *dev;
94 int rc;
95 u32 idx;
96
97 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
98 nfc_genl_family.attrbuf,
99 nfc_genl_family.maxattr,
100 nfc_genl_policy);
101 if (rc < 0)
102 return ERR_PTR(rc);
103
104 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
105 return ERR_PTR(-EINVAL);
106
107 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
108
109 dev = nfc_get_device(idx);
110 if (!dev)
111 return ERR_PTR(-ENODEV);
112
113 return dev;
114}
115
116static int nfc_genl_dump_targets(struct sk_buff *skb,
117 struct netlink_callback *cb)
118{
119 int i = cb->args[0];
120 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
121 int rc;
122
123 if (!dev) {
124 dev = __get_device_from_cb(cb);
125 if (IS_ERR(dev))
126 return PTR_ERR(dev);
127
128 cb->args[1] = (long) dev;
129 }
130
131 device_lock(&dev->dev);
132
133 cb->seq = dev->targets_generation;
134
135 while (i < dev->n_targets) {
136 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
137 NLM_F_MULTI);
138 if (rc < 0)
139 break;
140
141 i++;
142 }
143
144 device_unlock(&dev->dev);
145
146 cb->args[0] = i;
147
148 return skb->len;
149}
150
151static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
152{
153 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
154
155 if (dev)
156 nfc_put_device(dev);
157
158 return 0;
159}
160
161int nfc_genl_targets_found(struct nfc_dev *dev)
162{
163 struct sk_buff *msg;
164 void *hdr;
165
166 dev->genl_data.poll_req_pid = 0;
167
168 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
169 if (!msg)
170 return -ENOMEM;
171
172 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
173 NFC_EVENT_TARGETS_FOUND);
174 if (!hdr)
175 goto free_msg;
176
177 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
178 goto nla_put_failure;
179
180 genlmsg_end(msg, hdr);
181
182 return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
183
184nla_put_failure:
185 genlmsg_cancel(msg, hdr);
186free_msg:
187 nlmsg_free(msg);
188 return -EMSGSIZE;
189}
190
191int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
192{
193 struct sk_buff *msg;
194 void *hdr;
195
196 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
197 if (!msg)
198 return -ENOMEM;
199
200 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
201 NFC_EVENT_TARGET_LOST);
202 if (!hdr)
203 goto free_msg;
204
205 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
206 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
207 goto nla_put_failure;
208
209 genlmsg_end(msg, hdr);
210
211 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
212
213 return 0;
214
215nla_put_failure:
216 genlmsg_cancel(msg, hdr);
217free_msg:
218 nlmsg_free(msg);
219 return -EMSGSIZE;
220}
221
222int nfc_genl_device_added(struct nfc_dev *dev)
223{
224 struct sk_buff *msg;
225 void *hdr;
226
227 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
228 if (!msg)
229 return -ENOMEM;
230
231 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
232 NFC_EVENT_DEVICE_ADDED);
233 if (!hdr)
234 goto free_msg;
235
236 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
237 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
238 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
239 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
240 goto nla_put_failure;
241
242 genlmsg_end(msg, hdr);
243
244 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
245
246 return 0;
247
248nla_put_failure:
249 genlmsg_cancel(msg, hdr);
250free_msg:
251 nlmsg_free(msg);
252 return -EMSGSIZE;
253}
254
255int nfc_genl_device_removed(struct nfc_dev *dev)
256{
257 struct sk_buff *msg;
258 void *hdr;
259
260 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
261 if (!msg)
262 return -ENOMEM;
263
264 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
265 NFC_EVENT_DEVICE_REMOVED);
266 if (!hdr)
267 goto free_msg;
268
269 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
270 goto nla_put_failure;
271
272 genlmsg_end(msg, hdr);
273
274 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
275
276 return 0;
277
278nla_put_failure:
279 genlmsg_cancel(msg, hdr);
280free_msg:
281 nlmsg_free(msg);
282 return -EMSGSIZE;
283}
284
285static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
286 u32 pid, u32 seq,
287 struct netlink_callback *cb,
288 int flags)
289{
290 void *hdr;
291
292 hdr = genlmsg_put(msg, pid, seq, &nfc_genl_family, flags,
293 NFC_CMD_GET_DEVICE);
294 if (!hdr)
295 return -EMSGSIZE;
296
297 if (cb)
298 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
299
300 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
301 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
302 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
303 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
304 goto nla_put_failure;
305
306 return genlmsg_end(msg, hdr);
307
308nla_put_failure:
309 genlmsg_cancel(msg, hdr);
310 return -EMSGSIZE;
311}
312
313static int nfc_genl_dump_devices(struct sk_buff *skb,
314 struct netlink_callback *cb)
315{
316 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
317 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
318 bool first_call = false;
319
320 if (!iter) {
321 first_call = true;
322 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
323 if (!iter)
324 return -ENOMEM;
325 cb->args[0] = (long) iter;
326 }
327
328 mutex_lock(&nfc_devlist_mutex);
329
330 cb->seq = nfc_devlist_generation;
331
332 if (first_call) {
333 nfc_device_iter_init(iter);
334 dev = nfc_device_iter_next(iter);
335 }
336
337 while (dev) {
338 int rc;
339
340 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).pid,
341 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
342 if (rc < 0)
343 break;
344
345 dev = nfc_device_iter_next(iter);
346 }
347
348 mutex_unlock(&nfc_devlist_mutex);
349
350 cb->args[1] = (long) dev;
351
352 return skb->len;
353}
354
355static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
356{
357 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
358
359 nfc_device_iter_exit(iter);
360 kfree(iter);
361
362 return 0;
363}
364
365int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
366 u8 comm_mode, u8 rf_mode)
367{
368 struct sk_buff *msg;
369 void *hdr;
370
371 pr_debug("DEP link is up\n");
372
373 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
374 if (!msg)
375 return -ENOMEM;
376
377 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
378 if (!hdr)
379 goto free_msg;
380
381 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
382 goto nla_put_failure;
383 if (rf_mode == NFC_RF_INITIATOR &&
384 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
385 goto nla_put_failure;
386 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
387 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
388 goto nla_put_failure;
389
390 genlmsg_end(msg, hdr);
391
392 dev->dep_link_up = true;
393
394 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
395
396 return 0;
397
398nla_put_failure:
399 genlmsg_cancel(msg, hdr);
400free_msg:
401 nlmsg_free(msg);
402 return -EMSGSIZE;
403}
404
405int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
406{
407 struct sk_buff *msg;
408 void *hdr;
409
410 pr_debug("DEP link is down\n");
411
412 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
413 if (!msg)
414 return -ENOMEM;
415
416 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
417 NFC_CMD_DEP_LINK_DOWN);
418 if (!hdr)
419 goto free_msg;
420
421 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
422 goto nla_put_failure;
423
424 genlmsg_end(msg, hdr);
425
426 genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
427
428 return 0;
429
430nla_put_failure:
431 genlmsg_cancel(msg, hdr);
432free_msg:
433 nlmsg_free(msg);
434 return -EMSGSIZE;
435}
436
437static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
438{
439 struct sk_buff *msg;
440 struct nfc_dev *dev;
441 u32 idx;
442 int rc = -ENOBUFS;
443
444 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
445 return -EINVAL;
446
447 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
448
449 dev = nfc_get_device(idx);
450 if (!dev)
451 return -ENODEV;
452
453 msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
454 if (!msg) {
455 rc = -ENOMEM;
456 goto out_putdev;
457 }
458
459 rc = nfc_genl_send_device(msg, dev, info->snd_pid, info->snd_seq,
460 NULL, 0);
461 if (rc < 0)
462 goto out_free;
463
464 nfc_put_device(dev);
465
466 return genlmsg_reply(msg, info);
467
468out_free:
469 nlmsg_free(msg);
470out_putdev:
471 nfc_put_device(dev);
472 return rc;
473}
474
475static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
476{
477 struct nfc_dev *dev;
478 int rc;
479 u32 idx;
480
481 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
482 return -EINVAL;
483
484 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
485
486 dev = nfc_get_device(idx);
487 if (!dev)
488 return -ENODEV;
489
490 rc = nfc_dev_up(dev);
491
492 nfc_put_device(dev);
493 return rc;
494}
495
496static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
497{
498 struct nfc_dev *dev;
499 int rc;
500 u32 idx;
501
502 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
503 return -EINVAL;
504
505 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
506
507 dev = nfc_get_device(idx);
508 if (!dev)
509 return -ENODEV;
510
511 rc = nfc_dev_down(dev);
512
513 nfc_put_device(dev);
514 return rc;
515}
516
517static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
518{
519 struct nfc_dev *dev;
520 int rc;
521 u32 idx;
522 u32 protocols;
523
524 pr_debug("Poll start\n");
525
526 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
527 !info->attrs[NFC_ATTR_PROTOCOLS])
528 return -EINVAL;
529
530 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
531 protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
532
533 dev = nfc_get_device(idx);
534 if (!dev)
535 return -ENODEV;
536
537 mutex_lock(&dev->genl_data.genl_data_mutex);
538
539 rc = nfc_start_poll(dev, protocols);
540 if (!rc)
541 dev->genl_data.poll_req_pid = info->snd_pid;
542
543 mutex_unlock(&dev->genl_data.genl_data_mutex);
544
545 nfc_put_device(dev);
546 return rc;
547}
548
549static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
550{
551 struct nfc_dev *dev;
552 int rc;
553 u32 idx;
554
555 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
556 return -EINVAL;
557
558 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
559
560 dev = nfc_get_device(idx);
561 if (!dev)
562 return -ENODEV;
563
564 mutex_lock(&dev->genl_data.genl_data_mutex);
565
566 if (dev->genl_data.poll_req_pid != info->snd_pid) {
567 rc = -EBUSY;
568 goto out;
569 }
570
571 rc = nfc_stop_poll(dev);
572 dev->genl_data.poll_req_pid = 0;
573
574out:
575 mutex_unlock(&dev->genl_data.genl_data_mutex);
576 nfc_put_device(dev);
577 return rc;
578}
579
580static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
581{
582 struct nfc_dev *dev;
583 int rc, tgt_idx;
584 u32 idx;
585 u8 comm;
586
587 pr_debug("DEP link up\n");
588
589 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
590 !info->attrs[NFC_ATTR_COMM_MODE])
591 return -EINVAL;
592
593 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
594 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
595 tgt_idx = NFC_TARGET_IDX_ANY;
596 else
597 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
598
599 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
600
601 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
602 return -EINVAL;
603
604 dev = nfc_get_device(idx);
605 if (!dev)
606 return -ENODEV;
607
608 rc = nfc_dep_link_up(dev, tgt_idx, comm);
609
610 nfc_put_device(dev);
611
612 return rc;
613}
614
615static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
616{
617 struct nfc_dev *dev;
618 int rc;
619 u32 idx;
620
621 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
622 return -EINVAL;
623
624 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
625
626 dev = nfc_get_device(idx);
627 if (!dev)
628 return -ENODEV;
629
630 rc = nfc_dep_link_down(dev);
631
632 nfc_put_device(dev);
633 return rc;
634}
635
636static struct genl_ops nfc_genl_ops[] = {
637 {
638 .cmd = NFC_CMD_GET_DEVICE,
639 .doit = nfc_genl_get_device,
640 .dumpit = nfc_genl_dump_devices,
641 .done = nfc_genl_dump_devices_done,
642 .policy = nfc_genl_policy,
643 },
644 {
645 .cmd = NFC_CMD_DEV_UP,
646 .doit = nfc_genl_dev_up,
647 .policy = nfc_genl_policy,
648 },
649 {
650 .cmd = NFC_CMD_DEV_DOWN,
651 .doit = nfc_genl_dev_down,
652 .policy = nfc_genl_policy,
653 },
654 {
655 .cmd = NFC_CMD_START_POLL,
656 .doit = nfc_genl_start_poll,
657 .policy = nfc_genl_policy,
658 },
659 {
660 .cmd = NFC_CMD_STOP_POLL,
661 .doit = nfc_genl_stop_poll,
662 .policy = nfc_genl_policy,
663 },
664 {
665 .cmd = NFC_CMD_DEP_LINK_UP,
666 .doit = nfc_genl_dep_link_up,
667 .policy = nfc_genl_policy,
668 },
669 {
670 .cmd = NFC_CMD_DEP_LINK_DOWN,
671 .doit = nfc_genl_dep_link_down,
672 .policy = nfc_genl_policy,
673 },
674 {
675 .cmd = NFC_CMD_GET_TARGET,
676 .dumpit = nfc_genl_dump_targets,
677 .done = nfc_genl_dump_targets_done,
678 .policy = nfc_genl_policy,
679 },
680};
681
682static int nfc_genl_rcv_nl_event(struct notifier_block *this,
683 unsigned long event, void *ptr)
684{
685 struct netlink_notify *n = ptr;
686 struct class_dev_iter iter;
687 struct nfc_dev *dev;
688
689 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
690 goto out;
691
692 pr_debug("NETLINK_URELEASE event from id %d\n", n->pid);
693
694 nfc_device_iter_init(&iter);
695 dev = nfc_device_iter_next(&iter);
696
697 while (dev) {
698 if (dev->genl_data.poll_req_pid == n->pid) {
699 nfc_stop_poll(dev);
700 dev->genl_data.poll_req_pid = 0;
701 }
702 dev = nfc_device_iter_next(&iter);
703 }
704
705 nfc_device_iter_exit(&iter);
706
707out:
708 return NOTIFY_DONE;
709}
710
711void nfc_genl_data_init(struct nfc_genl_data *genl_data)
712{
713 genl_data->poll_req_pid = 0;
714 mutex_init(&genl_data->genl_data_mutex);
715}
716
717void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
718{
719 mutex_destroy(&genl_data->genl_data_mutex);
720}
721
722static struct notifier_block nl_notifier = {
723 .notifier_call = nfc_genl_rcv_nl_event,
724};
725
726/**
727 * nfc_genl_init() - Initialize netlink interface
728 *
729 * This initialization function registers the nfc netlink family.
730 */
731int __init nfc_genl_init(void)
732{
733 int rc;
734
735 rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
736 ARRAY_SIZE(nfc_genl_ops));
737 if (rc)
738 return rc;
739
740 rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
741
742 netlink_register_notifier(&nl_notifier);
743
744 return rc;
745}
746
747/**
748 * nfc_genl_exit() - Deinitialize netlink interface
749 *
750 * This exit function unregisters the nfc netlink family.
751 */
752void nfc_genl_exit(void)
753{
754 netlink_unregister_notifier(&nl_notifier);
755 genl_unregister_family(&nfc_genl_family);
756}
1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 */
21
22#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
23
24#include <net/genetlink.h>
25#include <linux/nfc.h>
26#include <linux/slab.h>
27
28#include "nfc.h"
29#include "llcp.h"
30
31static const struct genl_multicast_group nfc_genl_mcgrps[] = {
32 { .name = NFC_GENL_MCAST_EVENT_NAME, },
33};
34
35static struct genl_family nfc_genl_family = {
36 .id = GENL_ID_GENERATE,
37 .hdrsize = 0,
38 .name = NFC_GENL_NAME,
39 .version = NFC_GENL_VERSION,
40 .maxattr = NFC_ATTR_MAX,
41};
42
43static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
44 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
45 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
46 .len = NFC_DEVICE_NAME_MAXSIZE },
47 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
48 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
49 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
50 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
51 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
52 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
53 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
54 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
55 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
56 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
57 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
58 .len = NFC_FIRMWARE_NAME_MAXSIZE },
59 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
60};
61
62static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
63 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
64 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
65};
66
67static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
68 struct netlink_callback *cb, int flags)
69{
70 void *hdr;
71
72 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
73 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
74 if (!hdr)
75 return -EMSGSIZE;
76
77 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
78
79 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
80 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
81 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
82 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
83 goto nla_put_failure;
84 if (target->nfcid1_len > 0 &&
85 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
86 target->nfcid1))
87 goto nla_put_failure;
88 if (target->sensb_res_len > 0 &&
89 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
90 target->sensb_res))
91 goto nla_put_failure;
92 if (target->sensf_res_len > 0 &&
93 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
94 target->sensf_res))
95 goto nla_put_failure;
96
97 if (target->is_iso15693) {
98 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
99 target->iso15693_dsfid) ||
100 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
101 sizeof(target->iso15693_uid), target->iso15693_uid))
102 goto nla_put_failure;
103 }
104
105 return genlmsg_end(msg, hdr);
106
107nla_put_failure:
108 genlmsg_cancel(msg, hdr);
109 return -EMSGSIZE;
110}
111
112static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
113{
114 struct nfc_dev *dev;
115 int rc;
116 u32 idx;
117
118 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
119 nfc_genl_family.attrbuf,
120 nfc_genl_family.maxattr,
121 nfc_genl_policy);
122 if (rc < 0)
123 return ERR_PTR(rc);
124
125 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
126 return ERR_PTR(-EINVAL);
127
128 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
129
130 dev = nfc_get_device(idx);
131 if (!dev)
132 return ERR_PTR(-ENODEV);
133
134 return dev;
135}
136
137static int nfc_genl_dump_targets(struct sk_buff *skb,
138 struct netlink_callback *cb)
139{
140 int i = cb->args[0];
141 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
142 int rc;
143
144 if (!dev) {
145 dev = __get_device_from_cb(cb);
146 if (IS_ERR(dev))
147 return PTR_ERR(dev);
148
149 cb->args[1] = (long) dev;
150 }
151
152 device_lock(&dev->dev);
153
154 cb->seq = dev->targets_generation;
155
156 while (i < dev->n_targets) {
157 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
158 NLM_F_MULTI);
159 if (rc < 0)
160 break;
161
162 i++;
163 }
164
165 device_unlock(&dev->dev);
166
167 cb->args[0] = i;
168
169 return skb->len;
170}
171
172static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
173{
174 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
175
176 if (dev)
177 nfc_put_device(dev);
178
179 return 0;
180}
181
182int nfc_genl_targets_found(struct nfc_dev *dev)
183{
184 struct sk_buff *msg;
185 void *hdr;
186
187 dev->genl_data.poll_req_portid = 0;
188
189 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
190 if (!msg)
191 return -ENOMEM;
192
193 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
194 NFC_EVENT_TARGETS_FOUND);
195 if (!hdr)
196 goto free_msg;
197
198 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
199 goto nla_put_failure;
200
201 genlmsg_end(msg, hdr);
202
203 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
204
205nla_put_failure:
206 genlmsg_cancel(msg, hdr);
207free_msg:
208 nlmsg_free(msg);
209 return -EMSGSIZE;
210}
211
212int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
213{
214 struct sk_buff *msg;
215 void *hdr;
216
217 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
218 if (!msg)
219 return -ENOMEM;
220
221 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
222 NFC_EVENT_TARGET_LOST);
223 if (!hdr)
224 goto free_msg;
225
226 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
227 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
228 goto nla_put_failure;
229
230 genlmsg_end(msg, hdr);
231
232 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
233
234 return 0;
235
236nla_put_failure:
237 genlmsg_cancel(msg, hdr);
238free_msg:
239 nlmsg_free(msg);
240 return -EMSGSIZE;
241}
242
243int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
244{
245 struct sk_buff *msg;
246 void *hdr;
247
248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
249 if (!msg)
250 return -ENOMEM;
251
252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
253 NFC_EVENT_TM_ACTIVATED);
254 if (!hdr)
255 goto free_msg;
256
257 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
258 goto nla_put_failure;
259 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
260 goto nla_put_failure;
261
262 genlmsg_end(msg, hdr);
263
264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
265
266 return 0;
267
268nla_put_failure:
269 genlmsg_cancel(msg, hdr);
270free_msg:
271 nlmsg_free(msg);
272 return -EMSGSIZE;
273}
274
275int nfc_genl_tm_deactivated(struct nfc_dev *dev)
276{
277 struct sk_buff *msg;
278 void *hdr;
279
280 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
281 if (!msg)
282 return -ENOMEM;
283
284 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
285 NFC_EVENT_TM_DEACTIVATED);
286 if (!hdr)
287 goto free_msg;
288
289 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
290 goto nla_put_failure;
291
292 genlmsg_end(msg, hdr);
293
294 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
295
296 return 0;
297
298nla_put_failure:
299 genlmsg_cancel(msg, hdr);
300free_msg:
301 nlmsg_free(msg);
302 return -EMSGSIZE;
303}
304
305int nfc_genl_device_added(struct nfc_dev *dev)
306{
307 struct sk_buff *msg;
308 void *hdr;
309
310 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
311 if (!msg)
312 return -ENOMEM;
313
314 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
315 NFC_EVENT_DEVICE_ADDED);
316 if (!hdr)
317 goto free_msg;
318
319 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
320 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
321 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
322 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
323 goto nla_put_failure;
324
325 genlmsg_end(msg, hdr);
326
327 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
328
329 return 0;
330
331nla_put_failure:
332 genlmsg_cancel(msg, hdr);
333free_msg:
334 nlmsg_free(msg);
335 return -EMSGSIZE;
336}
337
338int nfc_genl_device_removed(struct nfc_dev *dev)
339{
340 struct sk_buff *msg;
341 void *hdr;
342
343 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
344 if (!msg)
345 return -ENOMEM;
346
347 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
348 NFC_EVENT_DEVICE_REMOVED);
349 if (!hdr)
350 goto free_msg;
351
352 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
353 goto nla_put_failure;
354
355 genlmsg_end(msg, hdr);
356
357 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
358
359 return 0;
360
361nla_put_failure:
362 genlmsg_cancel(msg, hdr);
363free_msg:
364 nlmsg_free(msg);
365 return -EMSGSIZE;
366}
367
368int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
369{
370 struct sk_buff *msg;
371 struct nlattr *sdp_attr, *uri_attr;
372 struct nfc_llcp_sdp_tlv *sdres;
373 struct hlist_node *n;
374 void *hdr;
375 int rc = -EMSGSIZE;
376 int i;
377
378 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
379 if (!msg)
380 return -ENOMEM;
381
382 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
383 NFC_EVENT_LLC_SDRES);
384 if (!hdr)
385 goto free_msg;
386
387 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
388 goto nla_put_failure;
389
390 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
391 if (sdp_attr == NULL) {
392 rc = -ENOMEM;
393 goto nla_put_failure;
394 }
395
396 i = 1;
397 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
398 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
399
400 uri_attr = nla_nest_start(msg, i++);
401 if (uri_attr == NULL) {
402 rc = -ENOMEM;
403 goto nla_put_failure;
404 }
405
406 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
407 goto nla_put_failure;
408
409 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
410 goto nla_put_failure;
411
412 nla_nest_end(msg, uri_attr);
413
414 hlist_del(&sdres->node);
415
416 nfc_llcp_free_sdp_tlv(sdres);
417 }
418
419 nla_nest_end(msg, sdp_attr);
420
421 genlmsg_end(msg, hdr);
422
423 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
424
425nla_put_failure:
426 genlmsg_cancel(msg, hdr);
427
428free_msg:
429 nlmsg_free(msg);
430
431 nfc_llcp_free_sdp_tlv_list(sdres_list);
432
433 return rc;
434}
435
436int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
437{
438 struct sk_buff *msg;
439 void *hdr;
440
441 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
442 if (!msg)
443 return -ENOMEM;
444
445 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
446 NFC_EVENT_SE_ADDED);
447 if (!hdr)
448 goto free_msg;
449
450 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
451 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
452 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
453 goto nla_put_failure;
454
455 genlmsg_end(msg, hdr);
456
457 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
458
459 return 0;
460
461nla_put_failure:
462 genlmsg_cancel(msg, hdr);
463free_msg:
464 nlmsg_free(msg);
465 return -EMSGSIZE;
466}
467
468int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
469{
470 struct sk_buff *msg;
471 void *hdr;
472
473 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
474 if (!msg)
475 return -ENOMEM;
476
477 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
478 NFC_EVENT_SE_REMOVED);
479 if (!hdr)
480 goto free_msg;
481
482 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
483 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
484 goto nla_put_failure;
485
486 genlmsg_end(msg, hdr);
487
488 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
489
490 return 0;
491
492nla_put_failure:
493 genlmsg_cancel(msg, hdr);
494free_msg:
495 nlmsg_free(msg);
496 return -EMSGSIZE;
497}
498
499static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
500 u32 portid, u32 seq,
501 struct netlink_callback *cb,
502 int flags)
503{
504 void *hdr;
505
506 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
507 NFC_CMD_GET_DEVICE);
508 if (!hdr)
509 return -EMSGSIZE;
510
511 if (cb)
512 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
513
514 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
515 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
516 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
517 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
518 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
519 goto nla_put_failure;
520
521 return genlmsg_end(msg, hdr);
522
523nla_put_failure:
524 genlmsg_cancel(msg, hdr);
525 return -EMSGSIZE;
526}
527
528static int nfc_genl_dump_devices(struct sk_buff *skb,
529 struct netlink_callback *cb)
530{
531 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
532 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
533 bool first_call = false;
534
535 if (!iter) {
536 first_call = true;
537 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
538 if (!iter)
539 return -ENOMEM;
540 cb->args[0] = (long) iter;
541 }
542
543 mutex_lock(&nfc_devlist_mutex);
544
545 cb->seq = nfc_devlist_generation;
546
547 if (first_call) {
548 nfc_device_iter_init(iter);
549 dev = nfc_device_iter_next(iter);
550 }
551
552 while (dev) {
553 int rc;
554
555 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
556 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
557 if (rc < 0)
558 break;
559
560 dev = nfc_device_iter_next(iter);
561 }
562
563 mutex_unlock(&nfc_devlist_mutex);
564
565 cb->args[1] = (long) dev;
566
567 return skb->len;
568}
569
570static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
571{
572 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
573
574 nfc_device_iter_exit(iter);
575 kfree(iter);
576
577 return 0;
578}
579
580int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
581 u8 comm_mode, u8 rf_mode)
582{
583 struct sk_buff *msg;
584 void *hdr;
585
586 pr_debug("DEP link is up\n");
587
588 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
589 if (!msg)
590 return -ENOMEM;
591
592 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
593 if (!hdr)
594 goto free_msg;
595
596 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
597 goto nla_put_failure;
598 if (rf_mode == NFC_RF_INITIATOR &&
599 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
600 goto nla_put_failure;
601 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
602 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
603 goto nla_put_failure;
604
605 genlmsg_end(msg, hdr);
606
607 dev->dep_link_up = true;
608
609 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
610
611 return 0;
612
613nla_put_failure:
614 genlmsg_cancel(msg, hdr);
615free_msg:
616 nlmsg_free(msg);
617 return -EMSGSIZE;
618}
619
620int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
621{
622 struct sk_buff *msg;
623 void *hdr;
624
625 pr_debug("DEP link is down\n");
626
627 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
628 if (!msg)
629 return -ENOMEM;
630
631 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
632 NFC_CMD_DEP_LINK_DOWN);
633 if (!hdr)
634 goto free_msg;
635
636 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
637 goto nla_put_failure;
638
639 genlmsg_end(msg, hdr);
640
641 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
642
643 return 0;
644
645nla_put_failure:
646 genlmsg_cancel(msg, hdr);
647free_msg:
648 nlmsg_free(msg);
649 return -EMSGSIZE;
650}
651
652static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
653{
654 struct sk_buff *msg;
655 struct nfc_dev *dev;
656 u32 idx;
657 int rc = -ENOBUFS;
658
659 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
660 return -EINVAL;
661
662 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
663
664 dev = nfc_get_device(idx);
665 if (!dev)
666 return -ENODEV;
667
668 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
669 if (!msg) {
670 rc = -ENOMEM;
671 goto out_putdev;
672 }
673
674 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
675 NULL, 0);
676 if (rc < 0)
677 goto out_free;
678
679 nfc_put_device(dev);
680
681 return genlmsg_reply(msg, info);
682
683out_free:
684 nlmsg_free(msg);
685out_putdev:
686 nfc_put_device(dev);
687 return rc;
688}
689
690static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
691{
692 struct nfc_dev *dev;
693 int rc;
694 u32 idx;
695
696 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
697 return -EINVAL;
698
699 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
700
701 dev = nfc_get_device(idx);
702 if (!dev)
703 return -ENODEV;
704
705 rc = nfc_dev_up(dev);
706
707 nfc_put_device(dev);
708 return rc;
709}
710
711static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
712{
713 struct nfc_dev *dev;
714 int rc;
715 u32 idx;
716
717 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
718 return -EINVAL;
719
720 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
721
722 dev = nfc_get_device(idx);
723 if (!dev)
724 return -ENODEV;
725
726 rc = nfc_dev_down(dev);
727
728 nfc_put_device(dev);
729 return rc;
730}
731
732static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
733{
734 struct nfc_dev *dev;
735 int rc;
736 u32 idx;
737 u32 im_protocols = 0, tm_protocols = 0;
738
739 pr_debug("Poll start\n");
740
741 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
742 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
743 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
744 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
745 return -EINVAL;
746
747 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
748
749 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
750 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
751
752 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
753 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
754 else if (info->attrs[NFC_ATTR_PROTOCOLS])
755 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
756
757 dev = nfc_get_device(idx);
758 if (!dev)
759 return -ENODEV;
760
761 mutex_lock(&dev->genl_data.genl_data_mutex);
762
763 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
764 if (!rc)
765 dev->genl_data.poll_req_portid = info->snd_portid;
766
767 mutex_unlock(&dev->genl_data.genl_data_mutex);
768
769 nfc_put_device(dev);
770 return rc;
771}
772
773static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
774{
775 struct nfc_dev *dev;
776 int rc;
777 u32 idx;
778
779 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
780 return -EINVAL;
781
782 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
783
784 dev = nfc_get_device(idx);
785 if (!dev)
786 return -ENODEV;
787
788 device_lock(&dev->dev);
789
790 if (!dev->polling) {
791 device_unlock(&dev->dev);
792 return -EINVAL;
793 }
794
795 device_unlock(&dev->dev);
796
797 mutex_lock(&dev->genl_data.genl_data_mutex);
798
799 if (dev->genl_data.poll_req_portid != info->snd_portid) {
800 rc = -EBUSY;
801 goto out;
802 }
803
804 rc = nfc_stop_poll(dev);
805 dev->genl_data.poll_req_portid = 0;
806
807out:
808 mutex_unlock(&dev->genl_data.genl_data_mutex);
809 nfc_put_device(dev);
810 return rc;
811}
812
813static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
814{
815 struct nfc_dev *dev;
816 int rc, tgt_idx;
817 u32 idx;
818 u8 comm;
819
820 pr_debug("DEP link up\n");
821
822 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
823 !info->attrs[NFC_ATTR_COMM_MODE])
824 return -EINVAL;
825
826 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
827 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
828 tgt_idx = NFC_TARGET_IDX_ANY;
829 else
830 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
831
832 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
833
834 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
835 return -EINVAL;
836
837 dev = nfc_get_device(idx);
838 if (!dev)
839 return -ENODEV;
840
841 rc = nfc_dep_link_up(dev, tgt_idx, comm);
842
843 nfc_put_device(dev);
844
845 return rc;
846}
847
848static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
849{
850 struct nfc_dev *dev;
851 int rc;
852 u32 idx;
853
854 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
855 return -EINVAL;
856
857 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
858
859 dev = nfc_get_device(idx);
860 if (!dev)
861 return -ENODEV;
862
863 rc = nfc_dep_link_down(dev);
864
865 nfc_put_device(dev);
866 return rc;
867}
868
869static int nfc_genl_send_params(struct sk_buff *msg,
870 struct nfc_llcp_local *local,
871 u32 portid, u32 seq)
872{
873 void *hdr;
874
875 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
876 NFC_CMD_LLC_GET_PARAMS);
877 if (!hdr)
878 return -EMSGSIZE;
879
880 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
881 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
882 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
883 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
884 goto nla_put_failure;
885
886 return genlmsg_end(msg, hdr);
887
888nla_put_failure:
889
890 genlmsg_cancel(msg, hdr);
891 return -EMSGSIZE;
892}
893
894static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
895{
896 struct nfc_dev *dev;
897 struct nfc_llcp_local *local;
898 int rc = 0;
899 struct sk_buff *msg = NULL;
900 u32 idx;
901
902 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
903 return -EINVAL;
904
905 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
906
907 dev = nfc_get_device(idx);
908 if (!dev)
909 return -ENODEV;
910
911 device_lock(&dev->dev);
912
913 local = nfc_llcp_find_local(dev);
914 if (!local) {
915 rc = -ENODEV;
916 goto exit;
917 }
918
919 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
920 if (!msg) {
921 rc = -ENOMEM;
922 goto exit;
923 }
924
925 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
926
927exit:
928 device_unlock(&dev->dev);
929
930 nfc_put_device(dev);
931
932 if (rc < 0) {
933 if (msg)
934 nlmsg_free(msg);
935
936 return rc;
937 }
938
939 return genlmsg_reply(msg, info);
940}
941
942static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
943{
944 struct nfc_dev *dev;
945 struct nfc_llcp_local *local;
946 u8 rw = 0;
947 u16 miux = 0;
948 u32 idx;
949 int rc = 0;
950
951 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
952 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
953 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
954 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
955 return -EINVAL;
956
957 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
958 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
959
960 if (rw > LLCP_MAX_RW)
961 return -EINVAL;
962 }
963
964 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
965 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
966
967 if (miux > LLCP_MAX_MIUX)
968 return -EINVAL;
969 }
970
971 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
972
973 dev = nfc_get_device(idx);
974 if (!dev)
975 return -ENODEV;
976
977 device_lock(&dev->dev);
978
979 local = nfc_llcp_find_local(dev);
980 if (!local) {
981 nfc_put_device(dev);
982 rc = -ENODEV;
983 goto exit;
984 }
985
986 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
987 if (dev->dep_link_up) {
988 rc = -EINPROGRESS;
989 goto exit;
990 }
991
992 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
993 }
994
995 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
996 local->rw = rw;
997
998 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
999 local->miux = cpu_to_be16(miux);
1000
1001exit:
1002 device_unlock(&dev->dev);
1003
1004 nfc_put_device(dev);
1005
1006 return rc;
1007}
1008
1009static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1010{
1011 struct nfc_dev *dev;
1012 struct nfc_llcp_local *local;
1013 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1014 u32 idx;
1015 u8 tid;
1016 char *uri;
1017 int rc = 0, rem;
1018 size_t uri_len, tlvs_len;
1019 struct hlist_head sdreq_list;
1020 struct nfc_llcp_sdp_tlv *sdreq;
1021
1022 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1023 !info->attrs[NFC_ATTR_LLC_SDP])
1024 return -EINVAL;
1025
1026 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1027
1028 dev = nfc_get_device(idx);
1029 if (!dev) {
1030 rc = -ENODEV;
1031 goto exit;
1032 }
1033
1034 device_lock(&dev->dev);
1035
1036 if (dev->dep_link_up == false) {
1037 rc = -ENOLINK;
1038 goto exit;
1039 }
1040
1041 local = nfc_llcp_find_local(dev);
1042 if (!local) {
1043 nfc_put_device(dev);
1044 rc = -ENODEV;
1045 goto exit;
1046 }
1047
1048 INIT_HLIST_HEAD(&sdreq_list);
1049
1050 tlvs_len = 0;
1051
1052 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1053 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1054 nfc_sdp_genl_policy);
1055
1056 if (rc != 0) {
1057 rc = -EINVAL;
1058 goto exit;
1059 }
1060
1061 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1062 continue;
1063
1064 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1065 if (uri_len == 0)
1066 continue;
1067
1068 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1069 if (uri == NULL || *uri == 0)
1070 continue;
1071
1072 tid = local->sdreq_next_tid++;
1073
1074 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1075 if (sdreq == NULL) {
1076 rc = -ENOMEM;
1077 goto exit;
1078 }
1079
1080 tlvs_len += sdreq->tlv_len;
1081
1082 hlist_add_head(&sdreq->node, &sdreq_list);
1083 }
1084
1085 if (hlist_empty(&sdreq_list)) {
1086 rc = -EINVAL;
1087 goto exit;
1088 }
1089
1090 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1091exit:
1092 device_unlock(&dev->dev);
1093
1094 nfc_put_device(dev);
1095
1096 return rc;
1097}
1098
1099static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1100{
1101 struct nfc_dev *dev;
1102 int rc;
1103 u32 idx;
1104 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1105
1106 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1107 return -EINVAL;
1108
1109 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1110
1111 dev = nfc_get_device(idx);
1112 if (!dev)
1113 return -ENODEV;
1114
1115 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1116 sizeof(firmware_name));
1117
1118 rc = nfc_fw_download(dev, firmware_name);
1119
1120 nfc_put_device(dev);
1121 return rc;
1122}
1123
1124int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1125 u32 result)
1126{
1127 struct sk_buff *msg;
1128 void *hdr;
1129
1130 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1131 if (!msg)
1132 return -ENOMEM;
1133
1134 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1135 NFC_CMD_FW_DOWNLOAD);
1136 if (!hdr)
1137 goto free_msg;
1138
1139 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1140 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1141 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1142 goto nla_put_failure;
1143
1144 genlmsg_end(msg, hdr);
1145
1146 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1147
1148 return 0;
1149
1150nla_put_failure:
1151 genlmsg_cancel(msg, hdr);
1152free_msg:
1153 nlmsg_free(msg);
1154 return -EMSGSIZE;
1155}
1156
1157static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1158{
1159 struct nfc_dev *dev;
1160 int rc;
1161 u32 idx, se_idx;
1162
1163 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1164 !info->attrs[NFC_ATTR_SE_INDEX])
1165 return -EINVAL;
1166
1167 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1168 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1169
1170 dev = nfc_get_device(idx);
1171 if (!dev)
1172 return -ENODEV;
1173
1174 rc = nfc_enable_se(dev, se_idx);
1175
1176 nfc_put_device(dev);
1177 return rc;
1178}
1179
1180static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1181{
1182 struct nfc_dev *dev;
1183 int rc;
1184 u32 idx, se_idx;
1185
1186 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1187 !info->attrs[NFC_ATTR_SE_INDEX])
1188 return -EINVAL;
1189
1190 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1191 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1192
1193 dev = nfc_get_device(idx);
1194 if (!dev)
1195 return -ENODEV;
1196
1197 rc = nfc_disable_se(dev, se_idx);
1198
1199 nfc_put_device(dev);
1200 return rc;
1201}
1202
1203static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1204 u32 portid, u32 seq,
1205 struct netlink_callback *cb,
1206 int flags)
1207{
1208 void *hdr;
1209 struct nfc_se *se, *n;
1210
1211 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1212 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1213 NFC_CMD_GET_SE);
1214 if (!hdr)
1215 goto nla_put_failure;
1216
1217 if (cb)
1218 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1219
1220 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1221 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1222 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1223 goto nla_put_failure;
1224
1225 if (genlmsg_end(msg, hdr) < 0)
1226 goto nla_put_failure;
1227 }
1228
1229 return 0;
1230
1231nla_put_failure:
1232 genlmsg_cancel(msg, hdr);
1233 return -EMSGSIZE;
1234}
1235
1236static int nfc_genl_dump_ses(struct sk_buff *skb,
1237 struct netlink_callback *cb)
1238{
1239 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1240 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1241 bool first_call = false;
1242
1243 if (!iter) {
1244 first_call = true;
1245 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1246 if (!iter)
1247 return -ENOMEM;
1248 cb->args[0] = (long) iter;
1249 }
1250
1251 mutex_lock(&nfc_devlist_mutex);
1252
1253 cb->seq = nfc_devlist_generation;
1254
1255 if (first_call) {
1256 nfc_device_iter_init(iter);
1257 dev = nfc_device_iter_next(iter);
1258 }
1259
1260 while (dev) {
1261 int rc;
1262
1263 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1264 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1265 if (rc < 0)
1266 break;
1267
1268 dev = nfc_device_iter_next(iter);
1269 }
1270
1271 mutex_unlock(&nfc_devlist_mutex);
1272
1273 cb->args[1] = (long) dev;
1274
1275 return skb->len;
1276}
1277
1278static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1279{
1280 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1281
1282 nfc_device_iter_exit(iter);
1283 kfree(iter);
1284
1285 return 0;
1286}
1287
1288struct se_io_ctx {
1289 u32 dev_idx;
1290 u32 se_idx;
1291};
1292
1293static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1294{
1295 struct se_io_ctx *ctx = context;
1296 struct sk_buff *msg;
1297 void *hdr;
1298
1299 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1300 if (!msg) {
1301 kfree(ctx);
1302 return;
1303 }
1304
1305 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1306 NFC_CMD_SE_IO);
1307 if (!hdr)
1308 goto free_msg;
1309
1310 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1311 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1312 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1313 goto nla_put_failure;
1314
1315 genlmsg_end(msg, hdr);
1316
1317 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1318
1319 kfree(ctx);
1320
1321 return;
1322
1323nla_put_failure:
1324 genlmsg_cancel(msg, hdr);
1325free_msg:
1326 nlmsg_free(msg);
1327 kfree(ctx);
1328
1329 return;
1330}
1331
1332static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1333{
1334 struct nfc_dev *dev;
1335 struct se_io_ctx *ctx;
1336 u32 dev_idx, se_idx;
1337 u8 *apdu;
1338 size_t apdu_len;
1339
1340 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1341 !info->attrs[NFC_ATTR_SE_INDEX] ||
1342 !info->attrs[NFC_ATTR_SE_APDU])
1343 return -EINVAL;
1344
1345 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1346 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1347
1348 dev = nfc_get_device(dev_idx);
1349 if (!dev)
1350 return -ENODEV;
1351
1352 if (!dev->ops || !dev->ops->se_io)
1353 return -ENOTSUPP;
1354
1355 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1356 if (apdu_len == 0)
1357 return -EINVAL;
1358
1359 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1360 if (!apdu)
1361 return -EINVAL;
1362
1363 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1364 if (!ctx)
1365 return -ENOMEM;
1366
1367 ctx->dev_idx = dev_idx;
1368 ctx->se_idx = se_idx;
1369
1370 return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1371}
1372
1373static const struct genl_ops nfc_genl_ops[] = {
1374 {
1375 .cmd = NFC_CMD_GET_DEVICE,
1376 .doit = nfc_genl_get_device,
1377 .dumpit = nfc_genl_dump_devices,
1378 .done = nfc_genl_dump_devices_done,
1379 .policy = nfc_genl_policy,
1380 },
1381 {
1382 .cmd = NFC_CMD_DEV_UP,
1383 .doit = nfc_genl_dev_up,
1384 .policy = nfc_genl_policy,
1385 },
1386 {
1387 .cmd = NFC_CMD_DEV_DOWN,
1388 .doit = nfc_genl_dev_down,
1389 .policy = nfc_genl_policy,
1390 },
1391 {
1392 .cmd = NFC_CMD_START_POLL,
1393 .doit = nfc_genl_start_poll,
1394 .policy = nfc_genl_policy,
1395 },
1396 {
1397 .cmd = NFC_CMD_STOP_POLL,
1398 .doit = nfc_genl_stop_poll,
1399 .policy = nfc_genl_policy,
1400 },
1401 {
1402 .cmd = NFC_CMD_DEP_LINK_UP,
1403 .doit = nfc_genl_dep_link_up,
1404 .policy = nfc_genl_policy,
1405 },
1406 {
1407 .cmd = NFC_CMD_DEP_LINK_DOWN,
1408 .doit = nfc_genl_dep_link_down,
1409 .policy = nfc_genl_policy,
1410 },
1411 {
1412 .cmd = NFC_CMD_GET_TARGET,
1413 .dumpit = nfc_genl_dump_targets,
1414 .done = nfc_genl_dump_targets_done,
1415 .policy = nfc_genl_policy,
1416 },
1417 {
1418 .cmd = NFC_CMD_LLC_GET_PARAMS,
1419 .doit = nfc_genl_llc_get_params,
1420 .policy = nfc_genl_policy,
1421 },
1422 {
1423 .cmd = NFC_CMD_LLC_SET_PARAMS,
1424 .doit = nfc_genl_llc_set_params,
1425 .policy = nfc_genl_policy,
1426 },
1427 {
1428 .cmd = NFC_CMD_LLC_SDREQ,
1429 .doit = nfc_genl_llc_sdreq,
1430 .policy = nfc_genl_policy,
1431 },
1432 {
1433 .cmd = NFC_CMD_FW_DOWNLOAD,
1434 .doit = nfc_genl_fw_download,
1435 .policy = nfc_genl_policy,
1436 },
1437 {
1438 .cmd = NFC_CMD_ENABLE_SE,
1439 .doit = nfc_genl_enable_se,
1440 .policy = nfc_genl_policy,
1441 },
1442 {
1443 .cmd = NFC_CMD_DISABLE_SE,
1444 .doit = nfc_genl_disable_se,
1445 .policy = nfc_genl_policy,
1446 },
1447 {
1448 .cmd = NFC_CMD_GET_SE,
1449 .dumpit = nfc_genl_dump_ses,
1450 .done = nfc_genl_dump_ses_done,
1451 .policy = nfc_genl_policy,
1452 },
1453 {
1454 .cmd = NFC_CMD_SE_IO,
1455 .doit = nfc_genl_se_io,
1456 .policy = nfc_genl_policy,
1457 },
1458};
1459
1460
1461struct urelease_work {
1462 struct work_struct w;
1463 int portid;
1464};
1465
1466static void nfc_urelease_event_work(struct work_struct *work)
1467{
1468 struct urelease_work *w = container_of(work, struct urelease_work, w);
1469 struct class_dev_iter iter;
1470 struct nfc_dev *dev;
1471
1472 pr_debug("portid %d\n", w->portid);
1473
1474 mutex_lock(&nfc_devlist_mutex);
1475
1476 nfc_device_iter_init(&iter);
1477 dev = nfc_device_iter_next(&iter);
1478
1479 while (dev) {
1480 mutex_lock(&dev->genl_data.genl_data_mutex);
1481
1482 if (dev->genl_data.poll_req_portid == w->portid) {
1483 nfc_stop_poll(dev);
1484 dev->genl_data.poll_req_portid = 0;
1485 }
1486
1487 mutex_unlock(&dev->genl_data.genl_data_mutex);
1488
1489 dev = nfc_device_iter_next(&iter);
1490 }
1491
1492 nfc_device_iter_exit(&iter);
1493
1494 mutex_unlock(&nfc_devlist_mutex);
1495
1496 kfree(w);
1497}
1498
1499static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1500 unsigned long event, void *ptr)
1501{
1502 struct netlink_notify *n = ptr;
1503 struct urelease_work *w;
1504
1505 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1506 goto out;
1507
1508 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1509
1510 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1511 if (w) {
1512 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1513 w->portid = n->portid;
1514 schedule_work((struct work_struct *) w);
1515 }
1516
1517out:
1518 return NOTIFY_DONE;
1519}
1520
1521void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1522{
1523 genl_data->poll_req_portid = 0;
1524 mutex_init(&genl_data->genl_data_mutex);
1525}
1526
1527void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1528{
1529 mutex_destroy(&genl_data->genl_data_mutex);
1530}
1531
1532static struct notifier_block nl_notifier = {
1533 .notifier_call = nfc_genl_rcv_nl_event,
1534};
1535
1536/**
1537 * nfc_genl_init() - Initialize netlink interface
1538 *
1539 * This initialization function registers the nfc netlink family.
1540 */
1541int __init nfc_genl_init(void)
1542{
1543 int rc;
1544
1545 rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1546 nfc_genl_ops,
1547 nfc_genl_mcgrps);
1548 if (rc)
1549 return rc;
1550
1551 netlink_register_notifier(&nl_notifier);
1552
1553 return 0;
1554}
1555
1556/**
1557 * nfc_genl_exit() - Deinitialize netlink interface
1558 *
1559 * This exit function unregisters the nfc netlink family.
1560 */
1561void nfc_genl_exit(void)
1562{
1563 netlink_unregister_notifier(&nl_notifier);
1564 genl_unregister_family(&nfc_genl_family);
1565}