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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 * Vendor commands implementation based on net/wireless/nl80211.c
9 * which is:
10 *
11 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
12 * Copyright 2013-2014 Intel Mobile Communications GmbH
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 */
27
28#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
29
30#include <net/genetlink.h>
31#include <linux/nfc.h>
32#include <linux/slab.h>
33
34#include "nfc.h"
35#include "llcp.h"
36
37static const struct genl_multicast_group nfc_genl_mcgrps[] = {
38 { .name = NFC_GENL_MCAST_EVENT_NAME, },
39};
40
41static struct genl_family nfc_genl_family = {
42 .id = GENL_ID_GENERATE,
43 .hdrsize = 0,
44 .name = NFC_GENL_NAME,
45 .version = NFC_GENL_VERSION,
46 .maxattr = NFC_ATTR_MAX,
47};
48
49static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
50 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
51 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
52 .len = NFC_DEVICE_NAME_MAXSIZE },
53 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
54 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
55 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
56 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
57 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
58 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
59 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
60 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
61 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
62 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
63 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
64 .len = NFC_FIRMWARE_NAME_MAXSIZE },
65 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
66 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
67
68};
69
70static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
71 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
72 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
73};
74
75static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
76 struct netlink_callback *cb, int flags)
77{
78 void *hdr;
79
80 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
81 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
82 if (!hdr)
83 return -EMSGSIZE;
84
85 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
86
87 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
88 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
89 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
90 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
91 goto nla_put_failure;
92 if (target->nfcid1_len > 0 &&
93 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
94 target->nfcid1))
95 goto nla_put_failure;
96 if (target->sensb_res_len > 0 &&
97 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
98 target->sensb_res))
99 goto nla_put_failure;
100 if (target->sensf_res_len > 0 &&
101 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
102 target->sensf_res))
103 goto nla_put_failure;
104
105 if (target->is_iso15693) {
106 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
107 target->iso15693_dsfid) ||
108 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
109 sizeof(target->iso15693_uid), target->iso15693_uid))
110 goto nla_put_failure;
111 }
112
113 genlmsg_end(msg, hdr);
114 return 0;
115
116nla_put_failure:
117 genlmsg_cancel(msg, hdr);
118 return -EMSGSIZE;
119}
120
121static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
122{
123 struct nfc_dev *dev;
124 int rc;
125 u32 idx;
126
127 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
128 nfc_genl_family.attrbuf,
129 nfc_genl_family.maxattr,
130 nfc_genl_policy);
131 if (rc < 0)
132 return ERR_PTR(rc);
133
134 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
135 return ERR_PTR(-EINVAL);
136
137 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
138
139 dev = nfc_get_device(idx);
140 if (!dev)
141 return ERR_PTR(-ENODEV);
142
143 return dev;
144}
145
146static int nfc_genl_dump_targets(struct sk_buff *skb,
147 struct netlink_callback *cb)
148{
149 int i = cb->args[0];
150 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
151 int rc;
152
153 if (!dev) {
154 dev = __get_device_from_cb(cb);
155 if (IS_ERR(dev))
156 return PTR_ERR(dev);
157
158 cb->args[1] = (long) dev;
159 }
160
161 device_lock(&dev->dev);
162
163 cb->seq = dev->targets_generation;
164
165 while (i < dev->n_targets) {
166 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
167 NLM_F_MULTI);
168 if (rc < 0)
169 break;
170
171 i++;
172 }
173
174 device_unlock(&dev->dev);
175
176 cb->args[0] = i;
177
178 return skb->len;
179}
180
181static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
182{
183 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
184
185 if (dev)
186 nfc_put_device(dev);
187
188 return 0;
189}
190
191int nfc_genl_targets_found(struct nfc_dev *dev)
192{
193 struct sk_buff *msg;
194 void *hdr;
195
196 dev->genl_data.poll_req_portid = 0;
197
198 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
199 if (!msg)
200 return -ENOMEM;
201
202 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
203 NFC_EVENT_TARGETS_FOUND);
204 if (!hdr)
205 goto free_msg;
206
207 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
208 goto nla_put_failure;
209
210 genlmsg_end(msg, hdr);
211
212 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
213
214nla_put_failure:
215 genlmsg_cancel(msg, hdr);
216free_msg:
217 nlmsg_free(msg);
218 return -EMSGSIZE;
219}
220
221int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
222{
223 struct sk_buff *msg;
224 void *hdr;
225
226 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
227 if (!msg)
228 return -ENOMEM;
229
230 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
231 NFC_EVENT_TARGET_LOST);
232 if (!hdr)
233 goto free_msg;
234
235 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
236 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
237 goto nla_put_failure;
238
239 genlmsg_end(msg, hdr);
240
241 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
242
243 return 0;
244
245nla_put_failure:
246 genlmsg_cancel(msg, hdr);
247free_msg:
248 nlmsg_free(msg);
249 return -EMSGSIZE;
250}
251
252int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
253{
254 struct sk_buff *msg;
255 void *hdr;
256
257 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
258 if (!msg)
259 return -ENOMEM;
260
261 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
262 NFC_EVENT_TM_ACTIVATED);
263 if (!hdr)
264 goto free_msg;
265
266 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
267 goto nla_put_failure;
268 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
269 goto nla_put_failure;
270
271 genlmsg_end(msg, hdr);
272
273 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
274
275 return 0;
276
277nla_put_failure:
278 genlmsg_cancel(msg, hdr);
279free_msg:
280 nlmsg_free(msg);
281 return -EMSGSIZE;
282}
283
284int nfc_genl_tm_deactivated(struct nfc_dev *dev)
285{
286 struct sk_buff *msg;
287 void *hdr;
288
289 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
290 if (!msg)
291 return -ENOMEM;
292
293 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
294 NFC_EVENT_TM_DEACTIVATED);
295 if (!hdr)
296 goto free_msg;
297
298 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
299 goto nla_put_failure;
300
301 genlmsg_end(msg, hdr);
302
303 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
304
305 return 0;
306
307nla_put_failure:
308 genlmsg_cancel(msg, hdr);
309free_msg:
310 nlmsg_free(msg);
311 return -EMSGSIZE;
312}
313
314int nfc_genl_device_added(struct nfc_dev *dev)
315{
316 struct sk_buff *msg;
317 void *hdr;
318
319 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
320 if (!msg)
321 return -ENOMEM;
322
323 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
324 NFC_EVENT_DEVICE_ADDED);
325 if (!hdr)
326 goto free_msg;
327
328 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
329 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
330 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
331 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
332 goto nla_put_failure;
333
334 genlmsg_end(msg, hdr);
335
336 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
337
338 return 0;
339
340nla_put_failure:
341 genlmsg_cancel(msg, hdr);
342free_msg:
343 nlmsg_free(msg);
344 return -EMSGSIZE;
345}
346
347int nfc_genl_device_removed(struct nfc_dev *dev)
348{
349 struct sk_buff *msg;
350 void *hdr;
351
352 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
353 if (!msg)
354 return -ENOMEM;
355
356 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
357 NFC_EVENT_DEVICE_REMOVED);
358 if (!hdr)
359 goto free_msg;
360
361 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
362 goto nla_put_failure;
363
364 genlmsg_end(msg, hdr);
365
366 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
367
368 return 0;
369
370nla_put_failure:
371 genlmsg_cancel(msg, hdr);
372free_msg:
373 nlmsg_free(msg);
374 return -EMSGSIZE;
375}
376
377int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
378{
379 struct sk_buff *msg;
380 struct nlattr *sdp_attr, *uri_attr;
381 struct nfc_llcp_sdp_tlv *sdres;
382 struct hlist_node *n;
383 void *hdr;
384 int rc = -EMSGSIZE;
385 int i;
386
387 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
388 if (!msg)
389 return -ENOMEM;
390
391 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
392 NFC_EVENT_LLC_SDRES);
393 if (!hdr)
394 goto free_msg;
395
396 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
397 goto nla_put_failure;
398
399 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
400 if (sdp_attr == NULL) {
401 rc = -ENOMEM;
402 goto nla_put_failure;
403 }
404
405 i = 1;
406 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
407 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
408
409 uri_attr = nla_nest_start(msg, i++);
410 if (uri_attr == NULL) {
411 rc = -ENOMEM;
412 goto nla_put_failure;
413 }
414
415 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
416 goto nla_put_failure;
417
418 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
419 goto nla_put_failure;
420
421 nla_nest_end(msg, uri_attr);
422
423 hlist_del(&sdres->node);
424
425 nfc_llcp_free_sdp_tlv(sdres);
426 }
427
428 nla_nest_end(msg, sdp_attr);
429
430 genlmsg_end(msg, hdr);
431
432 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
433
434nla_put_failure:
435 genlmsg_cancel(msg, hdr);
436
437free_msg:
438 nlmsg_free(msg);
439
440 nfc_llcp_free_sdp_tlv_list(sdres_list);
441
442 return rc;
443}
444
445int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
446{
447 struct sk_buff *msg;
448 void *hdr;
449
450 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
451 if (!msg)
452 return -ENOMEM;
453
454 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
455 NFC_EVENT_SE_ADDED);
456 if (!hdr)
457 goto free_msg;
458
459 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
460 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
461 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
462 goto nla_put_failure;
463
464 genlmsg_end(msg, hdr);
465
466 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
467
468 return 0;
469
470nla_put_failure:
471 genlmsg_cancel(msg, hdr);
472free_msg:
473 nlmsg_free(msg);
474 return -EMSGSIZE;
475}
476
477int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
478{
479 struct sk_buff *msg;
480 void *hdr;
481
482 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
483 if (!msg)
484 return -ENOMEM;
485
486 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
487 NFC_EVENT_SE_REMOVED);
488 if (!hdr)
489 goto free_msg;
490
491 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
492 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
493 goto nla_put_failure;
494
495 genlmsg_end(msg, hdr);
496
497 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
498
499 return 0;
500
501nla_put_failure:
502 genlmsg_cancel(msg, hdr);
503free_msg:
504 nlmsg_free(msg);
505 return -EMSGSIZE;
506}
507
508int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
509 struct nfc_evt_transaction *evt_transaction)
510{
511 struct nfc_se *se;
512 struct sk_buff *msg;
513 void *hdr;
514
515 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
516 if (!msg)
517 return -ENOMEM;
518
519 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
520 NFC_EVENT_SE_TRANSACTION);
521 if (!hdr)
522 goto free_msg;
523
524 se = nfc_find_se(dev, se_idx);
525 if (!se)
526 goto free_msg;
527
528 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
529 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
530 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
531 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
532 evt_transaction->aid) ||
533 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
534 evt_transaction->params))
535 goto nla_put_failure;
536
537 /* evt_transaction is no more used */
538 devm_kfree(&dev->dev, evt_transaction);
539
540 genlmsg_end(msg, hdr);
541
542 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
543
544 return 0;
545
546nla_put_failure:
547 genlmsg_cancel(msg, hdr);
548free_msg:
549 /* evt_transaction is no more used */
550 devm_kfree(&dev->dev, evt_transaction);
551 nlmsg_free(msg);
552 return -EMSGSIZE;
553}
554
555int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
556{
557 struct nfc_se *se;
558 struct sk_buff *msg;
559 void *hdr;
560
561 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
562 if (!msg)
563 return -ENOMEM;
564
565 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
566 NFC_EVENT_SE_CONNECTIVITY);
567 if (!hdr)
568 goto free_msg;
569
570 se = nfc_find_se(dev, se_idx);
571 if (!se)
572 goto free_msg;
573
574 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
575 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
576 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
577 goto nla_put_failure;
578
579 genlmsg_end(msg, hdr);
580
581 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
582
583 return 0;
584
585nla_put_failure:
586 genlmsg_cancel(msg, hdr);
587free_msg:
588 nlmsg_free(msg);
589 return -EMSGSIZE;
590}
591
592static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
593 u32 portid, u32 seq,
594 struct netlink_callback *cb,
595 int flags)
596{
597 void *hdr;
598
599 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
600 NFC_CMD_GET_DEVICE);
601 if (!hdr)
602 return -EMSGSIZE;
603
604 if (cb)
605 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
606
607 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
608 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
609 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
610 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
611 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
612 goto nla_put_failure;
613
614 genlmsg_end(msg, hdr);
615 return 0;
616
617nla_put_failure:
618 genlmsg_cancel(msg, hdr);
619 return -EMSGSIZE;
620}
621
622static int nfc_genl_dump_devices(struct sk_buff *skb,
623 struct netlink_callback *cb)
624{
625 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
626 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
627 bool first_call = false;
628
629 if (!iter) {
630 first_call = true;
631 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
632 if (!iter)
633 return -ENOMEM;
634 cb->args[0] = (long) iter;
635 }
636
637 mutex_lock(&nfc_devlist_mutex);
638
639 cb->seq = nfc_devlist_generation;
640
641 if (first_call) {
642 nfc_device_iter_init(iter);
643 dev = nfc_device_iter_next(iter);
644 }
645
646 while (dev) {
647 int rc;
648
649 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
650 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
651 if (rc < 0)
652 break;
653
654 dev = nfc_device_iter_next(iter);
655 }
656
657 mutex_unlock(&nfc_devlist_mutex);
658
659 cb->args[1] = (long) dev;
660
661 return skb->len;
662}
663
664static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
665{
666 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
667
668 nfc_device_iter_exit(iter);
669 kfree(iter);
670
671 return 0;
672}
673
674int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
675 u8 comm_mode, u8 rf_mode)
676{
677 struct sk_buff *msg;
678 void *hdr;
679
680 pr_debug("DEP link is up\n");
681
682 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
683 if (!msg)
684 return -ENOMEM;
685
686 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
687 if (!hdr)
688 goto free_msg;
689
690 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
691 goto nla_put_failure;
692 if (rf_mode == NFC_RF_INITIATOR &&
693 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
694 goto nla_put_failure;
695 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
696 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
697 goto nla_put_failure;
698
699 genlmsg_end(msg, hdr);
700
701 dev->dep_link_up = true;
702
703 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
704
705 return 0;
706
707nla_put_failure:
708 genlmsg_cancel(msg, hdr);
709free_msg:
710 nlmsg_free(msg);
711 return -EMSGSIZE;
712}
713
714int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
715{
716 struct sk_buff *msg;
717 void *hdr;
718
719 pr_debug("DEP link is down\n");
720
721 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
722 if (!msg)
723 return -ENOMEM;
724
725 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
726 NFC_CMD_DEP_LINK_DOWN);
727 if (!hdr)
728 goto free_msg;
729
730 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
731 goto nla_put_failure;
732
733 genlmsg_end(msg, hdr);
734
735 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
736
737 return 0;
738
739nla_put_failure:
740 genlmsg_cancel(msg, hdr);
741free_msg:
742 nlmsg_free(msg);
743 return -EMSGSIZE;
744}
745
746static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
747{
748 struct sk_buff *msg;
749 struct nfc_dev *dev;
750 u32 idx;
751 int rc = -ENOBUFS;
752
753 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
754 return -EINVAL;
755
756 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
757
758 dev = nfc_get_device(idx);
759 if (!dev)
760 return -ENODEV;
761
762 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
763 if (!msg) {
764 rc = -ENOMEM;
765 goto out_putdev;
766 }
767
768 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
769 NULL, 0);
770 if (rc < 0)
771 goto out_free;
772
773 nfc_put_device(dev);
774
775 return genlmsg_reply(msg, info);
776
777out_free:
778 nlmsg_free(msg);
779out_putdev:
780 nfc_put_device(dev);
781 return rc;
782}
783
784static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
785{
786 struct nfc_dev *dev;
787 int rc;
788 u32 idx;
789
790 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
791 return -EINVAL;
792
793 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
794
795 dev = nfc_get_device(idx);
796 if (!dev)
797 return -ENODEV;
798
799 rc = nfc_dev_up(dev);
800
801 nfc_put_device(dev);
802 return rc;
803}
804
805static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
806{
807 struct nfc_dev *dev;
808 int rc;
809 u32 idx;
810
811 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
812 return -EINVAL;
813
814 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
815
816 dev = nfc_get_device(idx);
817 if (!dev)
818 return -ENODEV;
819
820 rc = nfc_dev_down(dev);
821
822 nfc_put_device(dev);
823 return rc;
824}
825
826static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
827{
828 struct nfc_dev *dev;
829 int rc;
830 u32 idx;
831 u32 im_protocols = 0, tm_protocols = 0;
832
833 pr_debug("Poll start\n");
834
835 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
836 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
837 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
838 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
839 return -EINVAL;
840
841 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
842
843 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
844 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
845
846 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
847 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
848 else if (info->attrs[NFC_ATTR_PROTOCOLS])
849 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
850
851 dev = nfc_get_device(idx);
852 if (!dev)
853 return -ENODEV;
854
855 mutex_lock(&dev->genl_data.genl_data_mutex);
856
857 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
858 if (!rc)
859 dev->genl_data.poll_req_portid = info->snd_portid;
860
861 mutex_unlock(&dev->genl_data.genl_data_mutex);
862
863 nfc_put_device(dev);
864 return rc;
865}
866
867static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
868{
869 struct nfc_dev *dev;
870 int rc;
871 u32 idx;
872
873 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
874 return -EINVAL;
875
876 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
877
878 dev = nfc_get_device(idx);
879 if (!dev)
880 return -ENODEV;
881
882 device_lock(&dev->dev);
883
884 if (!dev->polling) {
885 device_unlock(&dev->dev);
886 return -EINVAL;
887 }
888
889 device_unlock(&dev->dev);
890
891 mutex_lock(&dev->genl_data.genl_data_mutex);
892
893 if (dev->genl_data.poll_req_portid != info->snd_portid) {
894 rc = -EBUSY;
895 goto out;
896 }
897
898 rc = nfc_stop_poll(dev);
899 dev->genl_data.poll_req_portid = 0;
900
901out:
902 mutex_unlock(&dev->genl_data.genl_data_mutex);
903 nfc_put_device(dev);
904 return rc;
905}
906
907static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
908{
909 struct nfc_dev *dev;
910 u32 device_idx, target_idx, protocol;
911 int rc;
912
913 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
914 return -EINVAL;
915
916 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
917
918 dev = nfc_get_device(device_idx);
919 if (!dev)
920 return -ENODEV;
921
922 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
923 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
924
925 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
926 rc = nfc_activate_target(dev, target_idx, protocol);
927
928 nfc_put_device(dev);
929 return 0;
930}
931
932static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
933{
934 struct nfc_dev *dev;
935 int rc, tgt_idx;
936 u32 idx;
937 u8 comm;
938
939 pr_debug("DEP link up\n");
940
941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
942 !info->attrs[NFC_ATTR_COMM_MODE])
943 return -EINVAL;
944
945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
946 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
947 tgt_idx = NFC_TARGET_IDX_ANY;
948 else
949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
950
951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
952
953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
954 return -EINVAL;
955
956 dev = nfc_get_device(idx);
957 if (!dev)
958 return -ENODEV;
959
960 rc = nfc_dep_link_up(dev, tgt_idx, comm);
961
962 nfc_put_device(dev);
963
964 return rc;
965}
966
967static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
968{
969 struct nfc_dev *dev;
970 int rc;
971 u32 idx;
972
973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
974 return -EINVAL;
975
976 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
977
978 dev = nfc_get_device(idx);
979 if (!dev)
980 return -ENODEV;
981
982 rc = nfc_dep_link_down(dev);
983
984 nfc_put_device(dev);
985 return rc;
986}
987
988static int nfc_genl_send_params(struct sk_buff *msg,
989 struct nfc_llcp_local *local,
990 u32 portid, u32 seq)
991{
992 void *hdr;
993
994 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
995 NFC_CMD_LLC_GET_PARAMS);
996 if (!hdr)
997 return -EMSGSIZE;
998
999 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1000 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1002 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1003 goto nla_put_failure;
1004
1005 genlmsg_end(msg, hdr);
1006 return 0;
1007
1008nla_put_failure:
1009
1010 genlmsg_cancel(msg, hdr);
1011 return -EMSGSIZE;
1012}
1013
1014static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1015{
1016 struct nfc_dev *dev;
1017 struct nfc_llcp_local *local;
1018 int rc = 0;
1019 struct sk_buff *msg = NULL;
1020 u32 idx;
1021
1022 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1023 return -EINVAL;
1024
1025 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1026
1027 dev = nfc_get_device(idx);
1028 if (!dev)
1029 return -ENODEV;
1030
1031 device_lock(&dev->dev);
1032
1033 local = nfc_llcp_find_local(dev);
1034 if (!local) {
1035 rc = -ENODEV;
1036 goto exit;
1037 }
1038
1039 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1040 if (!msg) {
1041 rc = -ENOMEM;
1042 goto exit;
1043 }
1044
1045 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1046
1047exit:
1048 device_unlock(&dev->dev);
1049
1050 nfc_put_device(dev);
1051
1052 if (rc < 0) {
1053 if (msg)
1054 nlmsg_free(msg);
1055
1056 return rc;
1057 }
1058
1059 return genlmsg_reply(msg, info);
1060}
1061
1062static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1063{
1064 struct nfc_dev *dev;
1065 struct nfc_llcp_local *local;
1066 u8 rw = 0;
1067 u16 miux = 0;
1068 u32 idx;
1069 int rc = 0;
1070
1071 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1072 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1073 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1074 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1075 return -EINVAL;
1076
1077 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1078 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1079
1080 if (rw > LLCP_MAX_RW)
1081 return -EINVAL;
1082 }
1083
1084 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1085 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1086
1087 if (miux > LLCP_MAX_MIUX)
1088 return -EINVAL;
1089 }
1090
1091 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1092
1093 dev = nfc_get_device(idx);
1094 if (!dev)
1095 return -ENODEV;
1096
1097 device_lock(&dev->dev);
1098
1099 local = nfc_llcp_find_local(dev);
1100 if (!local) {
1101 nfc_put_device(dev);
1102 rc = -ENODEV;
1103 goto exit;
1104 }
1105
1106 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1107 if (dev->dep_link_up) {
1108 rc = -EINPROGRESS;
1109 goto exit;
1110 }
1111
1112 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1113 }
1114
1115 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1116 local->rw = rw;
1117
1118 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1119 local->miux = cpu_to_be16(miux);
1120
1121exit:
1122 device_unlock(&dev->dev);
1123
1124 nfc_put_device(dev);
1125
1126 return rc;
1127}
1128
1129static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1130{
1131 struct nfc_dev *dev;
1132 struct nfc_llcp_local *local;
1133 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1134 u32 idx;
1135 u8 tid;
1136 char *uri;
1137 int rc = 0, rem;
1138 size_t uri_len, tlvs_len;
1139 struct hlist_head sdreq_list;
1140 struct nfc_llcp_sdp_tlv *sdreq;
1141
1142 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1143 !info->attrs[NFC_ATTR_LLC_SDP])
1144 return -EINVAL;
1145
1146 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1147
1148 dev = nfc_get_device(idx);
1149 if (!dev)
1150 return -ENODEV;
1151
1152 device_lock(&dev->dev);
1153
1154 if (dev->dep_link_up == false) {
1155 rc = -ENOLINK;
1156 goto exit;
1157 }
1158
1159 local = nfc_llcp_find_local(dev);
1160 if (!local) {
1161 nfc_put_device(dev);
1162 rc = -ENODEV;
1163 goto exit;
1164 }
1165
1166 INIT_HLIST_HEAD(&sdreq_list);
1167
1168 tlvs_len = 0;
1169
1170 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1171 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1172 nfc_sdp_genl_policy);
1173
1174 if (rc != 0) {
1175 rc = -EINVAL;
1176 goto exit;
1177 }
1178
1179 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1180 continue;
1181
1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri_len == 0)
1184 continue;
1185
1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1187 if (uri == NULL || *uri == 0)
1188 continue;
1189
1190 tid = local->sdreq_next_tid++;
1191
1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1193 if (sdreq == NULL) {
1194 rc = -ENOMEM;
1195 goto exit;
1196 }
1197
1198 tlvs_len += sdreq->tlv_len;
1199
1200 hlist_add_head(&sdreq->node, &sdreq_list);
1201 }
1202
1203 if (hlist_empty(&sdreq_list)) {
1204 rc = -EINVAL;
1205 goto exit;
1206 }
1207
1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1209exit:
1210 device_unlock(&dev->dev);
1211
1212 nfc_put_device(dev);
1213
1214 return rc;
1215}
1216
1217static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1218{
1219 struct nfc_dev *dev;
1220 int rc;
1221 u32 idx;
1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1223
1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1225 return -EINVAL;
1226
1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1228
1229 dev = nfc_get_device(idx);
1230 if (!dev)
1231 return -ENODEV;
1232
1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1234 sizeof(firmware_name));
1235
1236 rc = nfc_fw_download(dev, firmware_name);
1237
1238 nfc_put_device(dev);
1239 return rc;
1240}
1241
1242int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1243 u32 result)
1244{
1245 struct sk_buff *msg;
1246 void *hdr;
1247
1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1253 NFC_CMD_FW_DOWNLOAD);
1254 if (!hdr)
1255 goto free_msg;
1256
1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1260 goto nla_put_failure;
1261
1262 genlmsg_end(msg, hdr);
1263
1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1265
1266 return 0;
1267
1268nla_put_failure:
1269 genlmsg_cancel(msg, hdr);
1270free_msg:
1271 nlmsg_free(msg);
1272 return -EMSGSIZE;
1273}
1274
1275static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1276{
1277 struct nfc_dev *dev;
1278 int rc;
1279 u32 idx, se_idx;
1280
1281 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1282 !info->attrs[NFC_ATTR_SE_INDEX])
1283 return -EINVAL;
1284
1285 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1286 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1287
1288 dev = nfc_get_device(idx);
1289 if (!dev)
1290 return -ENODEV;
1291
1292 rc = nfc_enable_se(dev, se_idx);
1293
1294 nfc_put_device(dev);
1295 return rc;
1296}
1297
1298static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1299{
1300 struct nfc_dev *dev;
1301 int rc;
1302 u32 idx, se_idx;
1303
1304 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1305 !info->attrs[NFC_ATTR_SE_INDEX])
1306 return -EINVAL;
1307
1308 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1309 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1310
1311 dev = nfc_get_device(idx);
1312 if (!dev)
1313 return -ENODEV;
1314
1315 rc = nfc_disable_se(dev, se_idx);
1316
1317 nfc_put_device(dev);
1318 return rc;
1319}
1320
1321static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1322 u32 portid, u32 seq,
1323 struct netlink_callback *cb,
1324 int flags)
1325{
1326 void *hdr;
1327 struct nfc_se *se, *n;
1328
1329 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1330 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1331 NFC_CMD_GET_SE);
1332 if (!hdr)
1333 goto nla_put_failure;
1334
1335 if (cb)
1336 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1337
1338 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1339 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1340 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1341 goto nla_put_failure;
1342
1343 genlmsg_end(msg, hdr);
1344 }
1345
1346 return 0;
1347
1348nla_put_failure:
1349 genlmsg_cancel(msg, hdr);
1350 return -EMSGSIZE;
1351}
1352
1353static int nfc_genl_dump_ses(struct sk_buff *skb,
1354 struct netlink_callback *cb)
1355{
1356 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1357 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1358 bool first_call = false;
1359
1360 if (!iter) {
1361 first_call = true;
1362 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1363 if (!iter)
1364 return -ENOMEM;
1365 cb->args[0] = (long) iter;
1366 }
1367
1368 mutex_lock(&nfc_devlist_mutex);
1369
1370 cb->seq = nfc_devlist_generation;
1371
1372 if (first_call) {
1373 nfc_device_iter_init(iter);
1374 dev = nfc_device_iter_next(iter);
1375 }
1376
1377 while (dev) {
1378 int rc;
1379
1380 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1381 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1382 if (rc < 0)
1383 break;
1384
1385 dev = nfc_device_iter_next(iter);
1386 }
1387
1388 mutex_unlock(&nfc_devlist_mutex);
1389
1390 cb->args[1] = (long) dev;
1391
1392 return skb->len;
1393}
1394
1395static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1396{
1397 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1398
1399 nfc_device_iter_exit(iter);
1400 kfree(iter);
1401
1402 return 0;
1403}
1404
1405static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1406 u8 *apdu, size_t apdu_length,
1407 se_io_cb_t cb, void *cb_context)
1408{
1409 struct nfc_se *se;
1410 int rc;
1411
1412 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1413
1414 device_lock(&dev->dev);
1415
1416 if (!device_is_registered(&dev->dev)) {
1417 rc = -ENODEV;
1418 goto error;
1419 }
1420
1421 if (!dev->dev_up) {
1422 rc = -ENODEV;
1423 goto error;
1424 }
1425
1426 if (!dev->ops->se_io) {
1427 rc = -EOPNOTSUPP;
1428 goto error;
1429 }
1430
1431 se = nfc_find_se(dev, se_idx);
1432 if (!se) {
1433 rc = -EINVAL;
1434 goto error;
1435 }
1436
1437 if (se->state != NFC_SE_ENABLED) {
1438 rc = -ENODEV;
1439 goto error;
1440 }
1441
1442 rc = dev->ops->se_io(dev, se_idx, apdu,
1443 apdu_length, cb, cb_context);
1444
1445error:
1446 device_unlock(&dev->dev);
1447 return rc;
1448}
1449
1450struct se_io_ctx {
1451 u32 dev_idx;
1452 u32 se_idx;
1453};
1454
1455static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1456{
1457 struct se_io_ctx *ctx = context;
1458 struct sk_buff *msg;
1459 void *hdr;
1460
1461 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1462 if (!msg) {
1463 kfree(ctx);
1464 return;
1465 }
1466
1467 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1468 NFC_CMD_SE_IO);
1469 if (!hdr)
1470 goto free_msg;
1471
1472 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1473 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1474 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1475 goto nla_put_failure;
1476
1477 genlmsg_end(msg, hdr);
1478
1479 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1480
1481 kfree(ctx);
1482
1483 return;
1484
1485nla_put_failure:
1486 genlmsg_cancel(msg, hdr);
1487free_msg:
1488 nlmsg_free(msg);
1489 kfree(ctx);
1490
1491 return;
1492}
1493
1494static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1495{
1496 struct nfc_dev *dev;
1497 struct se_io_ctx *ctx;
1498 u32 dev_idx, se_idx;
1499 u8 *apdu;
1500 size_t apdu_len;
1501
1502 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1503 !info->attrs[NFC_ATTR_SE_INDEX] ||
1504 !info->attrs[NFC_ATTR_SE_APDU])
1505 return -EINVAL;
1506
1507 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1508 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1509
1510 dev = nfc_get_device(dev_idx);
1511 if (!dev)
1512 return -ENODEV;
1513
1514 if (!dev->ops || !dev->ops->se_io)
1515 return -ENOTSUPP;
1516
1517 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1518 if (apdu_len == 0)
1519 return -EINVAL;
1520
1521 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1522 if (!apdu)
1523 return -EINVAL;
1524
1525 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1526 if (!ctx)
1527 return -ENOMEM;
1528
1529 ctx->dev_idx = dev_idx;
1530 ctx->se_idx = se_idx;
1531
1532 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1533}
1534
1535static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1536 struct genl_info *info)
1537{
1538 struct nfc_dev *dev;
1539 struct nfc_vendor_cmd *cmd;
1540 u32 dev_idx, vid, subcmd;
1541 u8 *data;
1542 size_t data_len;
1543 int i, err;
1544
1545 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1546 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1547 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1548 return -EINVAL;
1549
1550 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1551 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1552 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1553
1554 dev = nfc_get_device(dev_idx);
1555 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1556 return -ENODEV;
1557
1558 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1559 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1560 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1561 if (data_len == 0)
1562 return -EINVAL;
1563 } else {
1564 data = NULL;
1565 data_len = 0;
1566 }
1567
1568 for (i = 0; i < dev->n_vendor_cmds; i++) {
1569 cmd = &dev->vendor_cmds[i];
1570
1571 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1572 continue;
1573
1574 dev->cur_cmd_info = info;
1575 err = cmd->doit(dev, data, data_len);
1576 dev->cur_cmd_info = NULL;
1577 return err;
1578 }
1579
1580 return -EOPNOTSUPP;
1581}
1582
1583/* message building helper */
1584static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1585 int flags, u8 cmd)
1586{
1587 /* since there is no private header just add the generic one */
1588 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1589}
1590
1591static struct sk_buff *
1592__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1593 u32 portid, u32 seq,
1594 enum nfc_attrs attr,
1595 u32 oui, u32 subcmd, gfp_t gfp)
1596{
1597 struct sk_buff *skb;
1598 void *hdr;
1599
1600 skb = nlmsg_new(approxlen + 100, gfp);
1601 if (!skb)
1602 return NULL;
1603
1604 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1605 if (!hdr) {
1606 kfree_skb(skb);
1607 return NULL;
1608 }
1609
1610 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1611 goto nla_put_failure;
1612 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1613 goto nla_put_failure;
1614 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1615 goto nla_put_failure;
1616
1617 ((void **)skb->cb)[0] = dev;
1618 ((void **)skb->cb)[1] = hdr;
1619
1620 return skb;
1621
1622nla_put_failure:
1623 kfree_skb(skb);
1624 return NULL;
1625}
1626
1627struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1628 enum nfc_attrs attr,
1629 u32 oui, u32 subcmd,
1630 int approxlen)
1631{
1632 if (WARN_ON(!dev->cur_cmd_info))
1633 return NULL;
1634
1635 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1636 dev->cur_cmd_info->snd_portid,
1637 dev->cur_cmd_info->snd_seq, attr,
1638 oui, subcmd, GFP_KERNEL);
1639}
1640EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1641
1642int nfc_vendor_cmd_reply(struct sk_buff *skb)
1643{
1644 struct nfc_dev *dev = ((void **)skb->cb)[0];
1645 void *hdr = ((void **)skb->cb)[1];
1646
1647 /* clear CB data for netlink core to own from now on */
1648 memset(skb->cb, 0, sizeof(skb->cb));
1649
1650 if (WARN_ON(!dev->cur_cmd_info)) {
1651 kfree_skb(skb);
1652 return -EINVAL;
1653 }
1654
1655 genlmsg_end(skb, hdr);
1656 return genlmsg_reply(skb, dev->cur_cmd_info);
1657}
1658EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1659
1660static const struct genl_ops nfc_genl_ops[] = {
1661 {
1662 .cmd = NFC_CMD_GET_DEVICE,
1663 .doit = nfc_genl_get_device,
1664 .dumpit = nfc_genl_dump_devices,
1665 .done = nfc_genl_dump_devices_done,
1666 .policy = nfc_genl_policy,
1667 },
1668 {
1669 .cmd = NFC_CMD_DEV_UP,
1670 .doit = nfc_genl_dev_up,
1671 .policy = nfc_genl_policy,
1672 },
1673 {
1674 .cmd = NFC_CMD_DEV_DOWN,
1675 .doit = nfc_genl_dev_down,
1676 .policy = nfc_genl_policy,
1677 },
1678 {
1679 .cmd = NFC_CMD_START_POLL,
1680 .doit = nfc_genl_start_poll,
1681 .policy = nfc_genl_policy,
1682 },
1683 {
1684 .cmd = NFC_CMD_STOP_POLL,
1685 .doit = nfc_genl_stop_poll,
1686 .policy = nfc_genl_policy,
1687 },
1688 {
1689 .cmd = NFC_CMD_DEP_LINK_UP,
1690 .doit = nfc_genl_dep_link_up,
1691 .policy = nfc_genl_policy,
1692 },
1693 {
1694 .cmd = NFC_CMD_DEP_LINK_DOWN,
1695 .doit = nfc_genl_dep_link_down,
1696 .policy = nfc_genl_policy,
1697 },
1698 {
1699 .cmd = NFC_CMD_GET_TARGET,
1700 .dumpit = nfc_genl_dump_targets,
1701 .done = nfc_genl_dump_targets_done,
1702 .policy = nfc_genl_policy,
1703 },
1704 {
1705 .cmd = NFC_CMD_LLC_GET_PARAMS,
1706 .doit = nfc_genl_llc_get_params,
1707 .policy = nfc_genl_policy,
1708 },
1709 {
1710 .cmd = NFC_CMD_LLC_SET_PARAMS,
1711 .doit = nfc_genl_llc_set_params,
1712 .policy = nfc_genl_policy,
1713 },
1714 {
1715 .cmd = NFC_CMD_LLC_SDREQ,
1716 .doit = nfc_genl_llc_sdreq,
1717 .policy = nfc_genl_policy,
1718 },
1719 {
1720 .cmd = NFC_CMD_FW_DOWNLOAD,
1721 .doit = nfc_genl_fw_download,
1722 .policy = nfc_genl_policy,
1723 },
1724 {
1725 .cmd = NFC_CMD_ENABLE_SE,
1726 .doit = nfc_genl_enable_se,
1727 .policy = nfc_genl_policy,
1728 },
1729 {
1730 .cmd = NFC_CMD_DISABLE_SE,
1731 .doit = nfc_genl_disable_se,
1732 .policy = nfc_genl_policy,
1733 },
1734 {
1735 .cmd = NFC_CMD_GET_SE,
1736 .dumpit = nfc_genl_dump_ses,
1737 .done = nfc_genl_dump_ses_done,
1738 .policy = nfc_genl_policy,
1739 },
1740 {
1741 .cmd = NFC_CMD_SE_IO,
1742 .doit = nfc_genl_se_io,
1743 .policy = nfc_genl_policy,
1744 },
1745 {
1746 .cmd = NFC_CMD_ACTIVATE_TARGET,
1747 .doit = nfc_genl_activate_target,
1748 .policy = nfc_genl_policy,
1749 },
1750 {
1751 .cmd = NFC_CMD_VENDOR,
1752 .doit = nfc_genl_vendor_cmd,
1753 .policy = nfc_genl_policy,
1754 },
1755};
1756
1757
1758struct urelease_work {
1759 struct work_struct w;
1760 u32 portid;
1761};
1762
1763static void nfc_urelease_event_work(struct work_struct *work)
1764{
1765 struct urelease_work *w = container_of(work, struct urelease_work, w);
1766 struct class_dev_iter iter;
1767 struct nfc_dev *dev;
1768
1769 pr_debug("portid %d\n", w->portid);
1770
1771 mutex_lock(&nfc_devlist_mutex);
1772
1773 nfc_device_iter_init(&iter);
1774 dev = nfc_device_iter_next(&iter);
1775
1776 while (dev) {
1777 mutex_lock(&dev->genl_data.genl_data_mutex);
1778
1779 if (dev->genl_data.poll_req_portid == w->portid) {
1780 nfc_stop_poll(dev);
1781 dev->genl_data.poll_req_portid = 0;
1782 }
1783
1784 mutex_unlock(&dev->genl_data.genl_data_mutex);
1785
1786 dev = nfc_device_iter_next(&iter);
1787 }
1788
1789 nfc_device_iter_exit(&iter);
1790
1791 mutex_unlock(&nfc_devlist_mutex);
1792
1793 kfree(w);
1794}
1795
1796static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1797 unsigned long event, void *ptr)
1798{
1799 struct netlink_notify *n = ptr;
1800 struct urelease_work *w;
1801
1802 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1803 goto out;
1804
1805 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1806
1807 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1808 if (w) {
1809 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1810 w->portid = n->portid;
1811 schedule_work((struct work_struct *) w);
1812 }
1813
1814out:
1815 return NOTIFY_DONE;
1816}
1817
1818void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1819{
1820 genl_data->poll_req_portid = 0;
1821 mutex_init(&genl_data->genl_data_mutex);
1822}
1823
1824void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1825{
1826 mutex_destroy(&genl_data->genl_data_mutex);
1827}
1828
1829static struct notifier_block nl_notifier = {
1830 .notifier_call = nfc_genl_rcv_nl_event,
1831};
1832
1833/**
1834 * nfc_genl_init() - Initialize netlink interface
1835 *
1836 * This initialization function registers the nfc netlink family.
1837 */
1838int __init nfc_genl_init(void)
1839{
1840 int rc;
1841
1842 rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1843 nfc_genl_ops,
1844 nfc_genl_mcgrps);
1845 if (rc)
1846 return rc;
1847
1848 netlink_register_notifier(&nl_notifier);
1849
1850 return 0;
1851}
1852
1853/**
1854 * nfc_genl_exit() - Deinitialize netlink interface
1855 *
1856 * This exit function unregisters the nfc netlink family.
1857 */
1858void nfc_genl_exit(void)
1859{
1860 netlink_unregister_notifier(&nl_notifier);
1861 genl_unregister_family(&nfc_genl_family);
1862}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2011 Instituto Nokia de Tecnologia
4 *
5 * Authors:
6 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
7 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
8 *
9 * Vendor commands implementation based on net/wireless/nl80211.c
10 * which is:
11 *
12 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
13 * Copyright 2013-2014 Intel Mobile Communications GmbH
14 */
15
16#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
17
18#include <net/genetlink.h>
19#include <linux/nfc.h>
20#include <linux/slab.h>
21
22#include "nfc.h"
23#include "llcp.h"
24
25static const struct genl_multicast_group nfc_genl_mcgrps[] = {
26 { .name = NFC_GENL_MCAST_EVENT_NAME, },
27};
28
29static struct genl_family nfc_genl_family;
30static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
31 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
32 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
33 .len = NFC_DEVICE_NAME_MAXSIZE },
34 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
35 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
36 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
37 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
38 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
39 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
40 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
41 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
42 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
43 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
44 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
45 .len = NFC_FIRMWARE_NAME_MAXSIZE },
46 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
47 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
48
49};
50
51static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
52 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
53 .len = U8_MAX - 4 },
54 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
55};
56
57static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
58 struct netlink_callback *cb, int flags)
59{
60 void *hdr;
61
62 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
63 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
64 if (!hdr)
65 return -EMSGSIZE;
66
67 genl_dump_check_consistent(cb, hdr);
68
69 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
70 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
71 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
72 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
73 goto nla_put_failure;
74 if (target->nfcid1_len > 0 &&
75 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
76 target->nfcid1))
77 goto nla_put_failure;
78 if (target->sensb_res_len > 0 &&
79 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
80 target->sensb_res))
81 goto nla_put_failure;
82 if (target->sensf_res_len > 0 &&
83 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
84 target->sensf_res))
85 goto nla_put_failure;
86
87 if (target->is_iso15693) {
88 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
89 target->iso15693_dsfid) ||
90 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
91 sizeof(target->iso15693_uid), target->iso15693_uid))
92 goto nla_put_failure;
93 }
94
95 genlmsg_end(msg, hdr);
96 return 0;
97
98nla_put_failure:
99 genlmsg_cancel(msg, hdr);
100 return -EMSGSIZE;
101}
102
103static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
104{
105 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
106 struct nfc_dev *dev;
107 int rc;
108 u32 idx;
109
110 rc = nlmsg_parse_deprecated(cb->nlh,
111 GENL_HDRLEN + nfc_genl_family.hdrsize,
112 attrbuf, nfc_genl_family.maxattr,
113 nfc_genl_policy, NULL);
114 if (rc < 0)
115 return ERR_PTR(rc);
116
117 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
118 return ERR_PTR(-EINVAL);
119
120 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
121
122 dev = nfc_get_device(idx);
123 if (!dev)
124 return ERR_PTR(-ENODEV);
125
126 return dev;
127}
128
129static int nfc_genl_dump_targets(struct sk_buff *skb,
130 struct netlink_callback *cb)
131{
132 int i = cb->args[0];
133 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
134 int rc;
135
136 if (!dev) {
137 dev = __get_device_from_cb(cb);
138 if (IS_ERR(dev))
139 return PTR_ERR(dev);
140
141 cb->args[1] = (long) dev;
142 }
143
144 device_lock(&dev->dev);
145
146 cb->seq = dev->targets_generation;
147
148 while (i < dev->n_targets) {
149 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
150 NLM_F_MULTI);
151 if (rc < 0)
152 break;
153
154 i++;
155 }
156
157 device_unlock(&dev->dev);
158
159 cb->args[0] = i;
160
161 return skb->len;
162}
163
164static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
165{
166 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
167
168 if (dev)
169 nfc_put_device(dev);
170
171 return 0;
172}
173
174int nfc_genl_targets_found(struct nfc_dev *dev)
175{
176 struct sk_buff *msg;
177 void *hdr;
178
179 dev->genl_data.poll_req_portid = 0;
180
181 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
182 if (!msg)
183 return -ENOMEM;
184
185 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
186 NFC_EVENT_TARGETS_FOUND);
187 if (!hdr)
188 goto free_msg;
189
190 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
191 goto nla_put_failure;
192
193 genlmsg_end(msg, hdr);
194
195 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
196
197nla_put_failure:
198free_msg:
199 nlmsg_free(msg);
200 return -EMSGSIZE;
201}
202
203int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
204{
205 struct sk_buff *msg;
206 void *hdr;
207
208 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
209 if (!msg)
210 return -ENOMEM;
211
212 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
213 NFC_EVENT_TARGET_LOST);
214 if (!hdr)
215 goto free_msg;
216
217 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
218 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
219 goto nla_put_failure;
220
221 genlmsg_end(msg, hdr);
222
223 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
224
225 return 0;
226
227nla_put_failure:
228free_msg:
229 nlmsg_free(msg);
230 return -EMSGSIZE;
231}
232
233int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
234{
235 struct sk_buff *msg;
236 void *hdr;
237
238 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
239 if (!msg)
240 return -ENOMEM;
241
242 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
243 NFC_EVENT_TM_ACTIVATED);
244 if (!hdr)
245 goto free_msg;
246
247 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
248 goto nla_put_failure;
249 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
250 goto nla_put_failure;
251
252 genlmsg_end(msg, hdr);
253
254 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
255
256 return 0;
257
258nla_put_failure:
259free_msg:
260 nlmsg_free(msg);
261 return -EMSGSIZE;
262}
263
264int nfc_genl_tm_deactivated(struct nfc_dev *dev)
265{
266 struct sk_buff *msg;
267 void *hdr;
268
269 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
270 if (!msg)
271 return -ENOMEM;
272
273 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
274 NFC_EVENT_TM_DEACTIVATED);
275 if (!hdr)
276 goto free_msg;
277
278 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
279 goto nla_put_failure;
280
281 genlmsg_end(msg, hdr);
282
283 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
284
285 return 0;
286
287nla_put_failure:
288free_msg:
289 nlmsg_free(msg);
290 return -EMSGSIZE;
291}
292
293static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
294{
295 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
296 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
297 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
298 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
299 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
300 return -1;
301 return 0;
302}
303
304int nfc_genl_device_added(struct nfc_dev *dev)
305{
306 struct sk_buff *msg;
307 void *hdr;
308
309 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
310 if (!msg)
311 return -ENOMEM;
312
313 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
314 NFC_EVENT_DEVICE_ADDED);
315 if (!hdr)
316 goto free_msg;
317
318 if (nfc_genl_setup_device_added(dev, msg))
319 goto nla_put_failure;
320
321 genlmsg_end(msg, hdr);
322
323 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
324
325 return 0;
326
327nla_put_failure:
328free_msg:
329 nlmsg_free(msg);
330 return -EMSGSIZE;
331}
332
333int nfc_genl_device_removed(struct nfc_dev *dev)
334{
335 struct sk_buff *msg;
336 void *hdr;
337
338 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
339 if (!msg)
340 return -ENOMEM;
341
342 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
343 NFC_EVENT_DEVICE_REMOVED);
344 if (!hdr)
345 goto free_msg;
346
347 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
348 goto nla_put_failure;
349
350 genlmsg_end(msg, hdr);
351
352 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
353
354 return 0;
355
356nla_put_failure:
357free_msg:
358 nlmsg_free(msg);
359 return -EMSGSIZE;
360}
361
362int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
363{
364 struct sk_buff *msg;
365 struct nlattr *sdp_attr, *uri_attr;
366 struct nfc_llcp_sdp_tlv *sdres;
367 struct hlist_node *n;
368 void *hdr;
369 int rc = -EMSGSIZE;
370 int i;
371
372 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
373 if (!msg)
374 return -ENOMEM;
375
376 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
377 NFC_EVENT_LLC_SDRES);
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
384 sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP);
385 if (sdp_attr == NULL) {
386 rc = -ENOMEM;
387 goto nla_put_failure;
388 }
389
390 i = 1;
391 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
392 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
393
394 uri_attr = nla_nest_start_noflag(msg, i++);
395 if (uri_attr == NULL) {
396 rc = -ENOMEM;
397 goto nla_put_failure;
398 }
399
400 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
401 goto nla_put_failure;
402
403 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
404 goto nla_put_failure;
405
406 nla_nest_end(msg, uri_attr);
407
408 hlist_del(&sdres->node);
409
410 nfc_llcp_free_sdp_tlv(sdres);
411 }
412
413 nla_nest_end(msg, sdp_attr);
414
415 genlmsg_end(msg, hdr);
416
417 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
418
419nla_put_failure:
420free_msg:
421 nlmsg_free(msg);
422
423 nfc_llcp_free_sdp_tlv_list(sdres_list);
424
425 return rc;
426}
427
428int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
429{
430 struct sk_buff *msg;
431 void *hdr;
432
433 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
434 if (!msg)
435 return -ENOMEM;
436
437 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
438 NFC_EVENT_SE_ADDED);
439 if (!hdr)
440 goto free_msg;
441
442 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
443 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
444 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
445 goto nla_put_failure;
446
447 genlmsg_end(msg, hdr);
448
449 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
450
451 return 0;
452
453nla_put_failure:
454free_msg:
455 nlmsg_free(msg);
456 return -EMSGSIZE;
457}
458
459int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
460{
461 struct sk_buff *msg;
462 void *hdr;
463
464 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
465 if (!msg)
466 return -ENOMEM;
467
468 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
469 NFC_EVENT_SE_REMOVED);
470 if (!hdr)
471 goto free_msg;
472
473 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
474 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
475 goto nla_put_failure;
476
477 genlmsg_end(msg, hdr);
478
479 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
480
481 return 0;
482
483nla_put_failure:
484free_msg:
485 nlmsg_free(msg);
486 return -EMSGSIZE;
487}
488
489int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
490 struct nfc_evt_transaction *evt_transaction)
491{
492 struct nfc_se *se;
493 struct sk_buff *msg;
494 void *hdr;
495
496 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
497 if (!msg)
498 return -ENOMEM;
499
500 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
501 NFC_EVENT_SE_TRANSACTION);
502 if (!hdr)
503 goto free_msg;
504
505 se = nfc_find_se(dev, se_idx);
506 if (!se)
507 goto free_msg;
508
509 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
510 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
511 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
512 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
513 evt_transaction->aid) ||
514 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
515 evt_transaction->params))
516 goto nla_put_failure;
517
518 /* evt_transaction is no more used */
519 devm_kfree(&dev->dev, evt_transaction);
520
521 genlmsg_end(msg, hdr);
522
523 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
524
525 return 0;
526
527nla_put_failure:
528free_msg:
529 /* evt_transaction is no more used */
530 devm_kfree(&dev->dev, evt_transaction);
531 nlmsg_free(msg);
532 return -EMSGSIZE;
533}
534
535int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
536{
537 struct nfc_se *se;
538 struct sk_buff *msg;
539 void *hdr;
540
541 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
542 if (!msg)
543 return -ENOMEM;
544
545 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
546 NFC_EVENT_SE_CONNECTIVITY);
547 if (!hdr)
548 goto free_msg;
549
550 se = nfc_find_se(dev, se_idx);
551 if (!se)
552 goto free_msg;
553
554 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
555 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
556 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
557 goto nla_put_failure;
558
559 genlmsg_end(msg, hdr);
560
561 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
562
563 return 0;
564
565nla_put_failure:
566free_msg:
567 nlmsg_free(msg);
568 return -EMSGSIZE;
569}
570
571static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
572 u32 portid, u32 seq,
573 struct netlink_callback *cb,
574 int flags)
575{
576 void *hdr;
577
578 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
579 NFC_CMD_GET_DEVICE);
580 if (!hdr)
581 return -EMSGSIZE;
582
583 if (cb)
584 genl_dump_check_consistent(cb, hdr);
585
586 if (nfc_genl_setup_device_added(dev, msg))
587 goto nla_put_failure;
588
589 genlmsg_end(msg, hdr);
590 return 0;
591
592nla_put_failure:
593 genlmsg_cancel(msg, hdr);
594 return -EMSGSIZE;
595}
596
597static int nfc_genl_dump_devices(struct sk_buff *skb,
598 struct netlink_callback *cb)
599{
600 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
601 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
602 bool first_call = false;
603
604 if (!iter) {
605 first_call = true;
606 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
607 if (!iter)
608 return -ENOMEM;
609 cb->args[0] = (long) iter;
610 }
611
612 mutex_lock(&nfc_devlist_mutex);
613
614 cb->seq = nfc_devlist_generation;
615
616 if (first_call) {
617 nfc_device_iter_init(iter);
618 dev = nfc_device_iter_next(iter);
619 }
620
621 while (dev) {
622 int rc;
623
624 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
625 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
626 if (rc < 0)
627 break;
628
629 dev = nfc_device_iter_next(iter);
630 }
631
632 mutex_unlock(&nfc_devlist_mutex);
633
634 cb->args[1] = (long) dev;
635
636 return skb->len;
637}
638
639static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
640{
641 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
642
643 nfc_device_iter_exit(iter);
644 kfree(iter);
645
646 return 0;
647}
648
649int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
650 u8 comm_mode, u8 rf_mode)
651{
652 struct sk_buff *msg;
653 void *hdr;
654
655 pr_debug("DEP link is up\n");
656
657 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
658 if (!msg)
659 return -ENOMEM;
660
661 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
662 if (!hdr)
663 goto free_msg;
664
665 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
666 goto nla_put_failure;
667 if (rf_mode == NFC_RF_INITIATOR &&
668 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
669 goto nla_put_failure;
670 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
671 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
672 goto nla_put_failure;
673
674 genlmsg_end(msg, hdr);
675
676 dev->dep_link_up = true;
677
678 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
679
680 return 0;
681
682nla_put_failure:
683free_msg:
684 nlmsg_free(msg);
685 return -EMSGSIZE;
686}
687
688int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
689{
690 struct sk_buff *msg;
691 void *hdr;
692
693 pr_debug("DEP link is down\n");
694
695 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
696 if (!msg)
697 return -ENOMEM;
698
699 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
700 NFC_CMD_DEP_LINK_DOWN);
701 if (!hdr)
702 goto free_msg;
703
704 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
705 goto nla_put_failure;
706
707 genlmsg_end(msg, hdr);
708
709 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
710
711 return 0;
712
713nla_put_failure:
714free_msg:
715 nlmsg_free(msg);
716 return -EMSGSIZE;
717}
718
719static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
720{
721 struct sk_buff *msg;
722 struct nfc_dev *dev;
723 u32 idx;
724 int rc = -ENOBUFS;
725
726 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
727 return -EINVAL;
728
729 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
730
731 dev = nfc_get_device(idx);
732 if (!dev)
733 return -ENODEV;
734
735 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
736 if (!msg) {
737 rc = -ENOMEM;
738 goto out_putdev;
739 }
740
741 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
742 NULL, 0);
743 if (rc < 0)
744 goto out_free;
745
746 nfc_put_device(dev);
747
748 return genlmsg_reply(msg, info);
749
750out_free:
751 nlmsg_free(msg);
752out_putdev:
753 nfc_put_device(dev);
754 return rc;
755}
756
757static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
758{
759 struct nfc_dev *dev;
760 int rc;
761 u32 idx;
762
763 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
764 return -EINVAL;
765
766 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
767
768 dev = nfc_get_device(idx);
769 if (!dev)
770 return -ENODEV;
771
772 rc = nfc_dev_up(dev);
773
774 nfc_put_device(dev);
775 return rc;
776}
777
778static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
779{
780 struct nfc_dev *dev;
781 int rc;
782 u32 idx;
783
784 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
785 return -EINVAL;
786
787 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
788
789 dev = nfc_get_device(idx);
790 if (!dev)
791 return -ENODEV;
792
793 rc = nfc_dev_down(dev);
794
795 nfc_put_device(dev);
796 return rc;
797}
798
799static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
800{
801 struct nfc_dev *dev;
802 int rc;
803 u32 idx;
804 u32 im_protocols = 0, tm_protocols = 0;
805
806 pr_debug("Poll start\n");
807
808 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
809 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
810 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
811 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
812 return -EINVAL;
813
814 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
815
816 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
817 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
818
819 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
820 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
821 else if (info->attrs[NFC_ATTR_PROTOCOLS])
822 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
823
824 dev = nfc_get_device(idx);
825 if (!dev)
826 return -ENODEV;
827
828 mutex_lock(&dev->genl_data.genl_data_mutex);
829
830 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
831 if (!rc)
832 dev->genl_data.poll_req_portid = info->snd_portid;
833
834 mutex_unlock(&dev->genl_data.genl_data_mutex);
835
836 nfc_put_device(dev);
837 return rc;
838}
839
840static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
841{
842 struct nfc_dev *dev;
843 int rc;
844 u32 idx;
845
846 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
847 return -EINVAL;
848
849 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
850
851 dev = nfc_get_device(idx);
852 if (!dev)
853 return -ENODEV;
854
855 device_lock(&dev->dev);
856
857 if (!dev->polling) {
858 device_unlock(&dev->dev);
859 return -EINVAL;
860 }
861
862 device_unlock(&dev->dev);
863
864 mutex_lock(&dev->genl_data.genl_data_mutex);
865
866 if (dev->genl_data.poll_req_portid != info->snd_portid) {
867 rc = -EBUSY;
868 goto out;
869 }
870
871 rc = nfc_stop_poll(dev);
872 dev->genl_data.poll_req_portid = 0;
873
874out:
875 mutex_unlock(&dev->genl_data.genl_data_mutex);
876 nfc_put_device(dev);
877 return rc;
878}
879
880static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
881{
882 struct nfc_dev *dev;
883 u32 device_idx, target_idx, protocol;
884 int rc;
885
886 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
887 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
888 !info->attrs[NFC_ATTR_PROTOCOLS])
889 return -EINVAL;
890
891 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
892
893 dev = nfc_get_device(device_idx);
894 if (!dev)
895 return -ENODEV;
896
897 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
898 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
899
900 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
901 rc = nfc_activate_target(dev, target_idx, protocol);
902
903 nfc_put_device(dev);
904 return rc;
905}
906
907static int nfc_genl_deactivate_target(struct sk_buff *skb,
908 struct genl_info *info)
909{
910 struct nfc_dev *dev;
911 u32 device_idx, target_idx;
912 int rc;
913
914 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
915 !info->attrs[NFC_ATTR_TARGET_INDEX])
916 return -EINVAL;
917
918 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
919
920 dev = nfc_get_device(device_idx);
921 if (!dev)
922 return -ENODEV;
923
924 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
925
926 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
927
928 nfc_put_device(dev);
929 return rc;
930}
931
932static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
933{
934 struct nfc_dev *dev;
935 int rc, tgt_idx;
936 u32 idx;
937 u8 comm;
938
939 pr_debug("DEP link up\n");
940
941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
942 !info->attrs[NFC_ATTR_COMM_MODE])
943 return -EINVAL;
944
945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
946 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
947 tgt_idx = NFC_TARGET_IDX_ANY;
948 else
949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
950
951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
952
953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
954 return -EINVAL;
955
956 dev = nfc_get_device(idx);
957 if (!dev)
958 return -ENODEV;
959
960 rc = nfc_dep_link_up(dev, tgt_idx, comm);
961
962 nfc_put_device(dev);
963
964 return rc;
965}
966
967static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
968{
969 struct nfc_dev *dev;
970 int rc;
971 u32 idx;
972
973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
974 !info->attrs[NFC_ATTR_TARGET_INDEX])
975 return -EINVAL;
976
977 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
978
979 dev = nfc_get_device(idx);
980 if (!dev)
981 return -ENODEV;
982
983 rc = nfc_dep_link_down(dev);
984
985 nfc_put_device(dev);
986 return rc;
987}
988
989static int nfc_genl_send_params(struct sk_buff *msg,
990 struct nfc_llcp_local *local,
991 u32 portid, u32 seq)
992{
993 void *hdr;
994
995 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
996 NFC_CMD_LLC_GET_PARAMS);
997 if (!hdr)
998 return -EMSGSIZE;
999
1000 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1002 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1003 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1004 goto nla_put_failure;
1005
1006 genlmsg_end(msg, hdr);
1007 return 0;
1008
1009nla_put_failure:
1010 genlmsg_cancel(msg, hdr);
1011 return -EMSGSIZE;
1012}
1013
1014static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1015{
1016 struct nfc_dev *dev;
1017 struct nfc_llcp_local *local;
1018 int rc = 0;
1019 struct sk_buff *msg = NULL;
1020 u32 idx;
1021
1022 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1023 !info->attrs[NFC_ATTR_FIRMWARE_NAME])
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 return -ENODEV;
1031
1032 device_lock(&dev->dev);
1033
1034 local = nfc_llcp_find_local(dev);
1035 if (!local) {
1036 rc = -ENODEV;
1037 goto exit;
1038 }
1039
1040 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1041 if (!msg) {
1042 rc = -ENOMEM;
1043 goto exit;
1044 }
1045
1046 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1047
1048exit:
1049 device_unlock(&dev->dev);
1050
1051 nfc_put_device(dev);
1052
1053 if (rc < 0) {
1054 if (msg)
1055 nlmsg_free(msg);
1056
1057 return rc;
1058 }
1059
1060 return genlmsg_reply(msg, info);
1061}
1062
1063static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1064{
1065 struct nfc_dev *dev;
1066 struct nfc_llcp_local *local;
1067 u8 rw = 0;
1068 u16 miux = 0;
1069 u32 idx;
1070 int rc = 0;
1071
1072 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1073 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1074 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1075 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1076 return -EINVAL;
1077
1078 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1079 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1080
1081 if (rw > LLCP_MAX_RW)
1082 return -EINVAL;
1083 }
1084
1085 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1086 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1087
1088 if (miux > LLCP_MAX_MIUX)
1089 return -EINVAL;
1090 }
1091
1092 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1093
1094 dev = nfc_get_device(idx);
1095 if (!dev)
1096 return -ENODEV;
1097
1098 device_lock(&dev->dev);
1099
1100 local = nfc_llcp_find_local(dev);
1101 if (!local) {
1102 rc = -ENODEV;
1103 goto exit;
1104 }
1105
1106 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1107 if (dev->dep_link_up) {
1108 rc = -EINPROGRESS;
1109 goto exit;
1110 }
1111
1112 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1113 }
1114
1115 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1116 local->rw = rw;
1117
1118 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1119 local->miux = cpu_to_be16(miux);
1120
1121exit:
1122 device_unlock(&dev->dev);
1123
1124 nfc_put_device(dev);
1125
1126 return rc;
1127}
1128
1129static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1130{
1131 struct nfc_dev *dev;
1132 struct nfc_llcp_local *local;
1133 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1134 u32 idx;
1135 u8 tid;
1136 char *uri;
1137 int rc = 0, rem;
1138 size_t uri_len, tlvs_len;
1139 struct hlist_head sdreq_list;
1140 struct nfc_llcp_sdp_tlv *sdreq;
1141
1142 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1143 !info->attrs[NFC_ATTR_LLC_SDP])
1144 return -EINVAL;
1145
1146 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1147
1148 dev = nfc_get_device(idx);
1149 if (!dev)
1150 return -ENODEV;
1151
1152 device_lock(&dev->dev);
1153
1154 if (dev->dep_link_up == false) {
1155 rc = -ENOLINK;
1156 goto exit;
1157 }
1158
1159 local = nfc_llcp_find_local(dev);
1160 if (!local) {
1161 rc = -ENODEV;
1162 goto exit;
1163 }
1164
1165 INIT_HLIST_HEAD(&sdreq_list);
1166
1167 tlvs_len = 0;
1168
1169 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1170 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1171 attr, nfc_sdp_genl_policy,
1172 info->extack);
1173
1174 if (rc != 0) {
1175 rc = -EINVAL;
1176 goto exit;
1177 }
1178
1179 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1180 continue;
1181
1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri_len == 0)
1184 continue;
1185
1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1187 if (uri == NULL || *uri == 0)
1188 continue;
1189
1190 tid = local->sdreq_next_tid++;
1191
1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1193 if (sdreq == NULL) {
1194 rc = -ENOMEM;
1195 goto exit;
1196 }
1197
1198 tlvs_len += sdreq->tlv_len;
1199
1200 hlist_add_head(&sdreq->node, &sdreq_list);
1201 }
1202
1203 if (hlist_empty(&sdreq_list)) {
1204 rc = -EINVAL;
1205 goto exit;
1206 }
1207
1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1209exit:
1210 device_unlock(&dev->dev);
1211
1212 nfc_put_device(dev);
1213
1214 return rc;
1215}
1216
1217static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1218{
1219 struct nfc_dev *dev;
1220 int rc;
1221 u32 idx;
1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1223
1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1225 return -EINVAL;
1226
1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1228
1229 dev = nfc_get_device(idx);
1230 if (!dev)
1231 return -ENODEV;
1232
1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1234 sizeof(firmware_name));
1235
1236 rc = nfc_fw_download(dev, firmware_name);
1237
1238 nfc_put_device(dev);
1239 return rc;
1240}
1241
1242int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1243 u32 result)
1244{
1245 struct sk_buff *msg;
1246 void *hdr;
1247
1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1253 NFC_CMD_FW_DOWNLOAD);
1254 if (!hdr)
1255 goto free_msg;
1256
1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1260 goto nla_put_failure;
1261
1262 genlmsg_end(msg, hdr);
1263
1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1265
1266 return 0;
1267
1268nla_put_failure:
1269free_msg:
1270 nlmsg_free(msg);
1271 return -EMSGSIZE;
1272}
1273
1274static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1275{
1276 struct nfc_dev *dev;
1277 int rc;
1278 u32 idx, se_idx;
1279
1280 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1281 !info->attrs[NFC_ATTR_SE_INDEX])
1282 return -EINVAL;
1283
1284 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1285 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1286
1287 dev = nfc_get_device(idx);
1288 if (!dev)
1289 return -ENODEV;
1290
1291 rc = nfc_enable_se(dev, se_idx);
1292
1293 nfc_put_device(dev);
1294 return rc;
1295}
1296
1297static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1298{
1299 struct nfc_dev *dev;
1300 int rc;
1301 u32 idx, se_idx;
1302
1303 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1304 !info->attrs[NFC_ATTR_SE_INDEX])
1305 return -EINVAL;
1306
1307 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1308 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1309
1310 dev = nfc_get_device(idx);
1311 if (!dev)
1312 return -ENODEV;
1313
1314 rc = nfc_disable_se(dev, se_idx);
1315
1316 nfc_put_device(dev);
1317 return rc;
1318}
1319
1320static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1321 u32 portid, u32 seq,
1322 struct netlink_callback *cb,
1323 int flags)
1324{
1325 void *hdr;
1326 struct nfc_se *se, *n;
1327
1328 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1329 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1330 NFC_CMD_GET_SE);
1331 if (!hdr)
1332 goto nla_put_failure;
1333
1334 if (cb)
1335 genl_dump_check_consistent(cb, hdr);
1336
1337 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1338 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1339 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1340 goto nla_put_failure;
1341
1342 genlmsg_end(msg, hdr);
1343 }
1344
1345 return 0;
1346
1347nla_put_failure:
1348 genlmsg_cancel(msg, hdr);
1349 return -EMSGSIZE;
1350}
1351
1352static int nfc_genl_dump_ses(struct sk_buff *skb,
1353 struct netlink_callback *cb)
1354{
1355 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1356 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1357 bool first_call = false;
1358
1359 if (!iter) {
1360 first_call = true;
1361 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1362 if (!iter)
1363 return -ENOMEM;
1364 cb->args[0] = (long) iter;
1365 }
1366
1367 mutex_lock(&nfc_devlist_mutex);
1368
1369 cb->seq = nfc_devlist_generation;
1370
1371 if (first_call) {
1372 nfc_device_iter_init(iter);
1373 dev = nfc_device_iter_next(iter);
1374 }
1375
1376 while (dev) {
1377 int rc;
1378
1379 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1380 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1381 if (rc < 0)
1382 break;
1383
1384 dev = nfc_device_iter_next(iter);
1385 }
1386
1387 mutex_unlock(&nfc_devlist_mutex);
1388
1389 cb->args[1] = (long) dev;
1390
1391 return skb->len;
1392}
1393
1394static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1395{
1396 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1397
1398 nfc_device_iter_exit(iter);
1399 kfree(iter);
1400
1401 return 0;
1402}
1403
1404static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1405 u8 *apdu, size_t apdu_length,
1406 se_io_cb_t cb, void *cb_context)
1407{
1408 struct nfc_se *se;
1409 int rc;
1410
1411 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1412
1413 device_lock(&dev->dev);
1414
1415 if (!device_is_registered(&dev->dev)) {
1416 rc = -ENODEV;
1417 goto error;
1418 }
1419
1420 if (!dev->dev_up) {
1421 rc = -ENODEV;
1422 goto error;
1423 }
1424
1425 if (!dev->ops->se_io) {
1426 rc = -EOPNOTSUPP;
1427 goto error;
1428 }
1429
1430 se = nfc_find_se(dev, se_idx);
1431 if (!se) {
1432 rc = -EINVAL;
1433 goto error;
1434 }
1435
1436 if (se->state != NFC_SE_ENABLED) {
1437 rc = -ENODEV;
1438 goto error;
1439 }
1440
1441 rc = dev->ops->se_io(dev, se_idx, apdu,
1442 apdu_length, cb, cb_context);
1443
1444error:
1445 device_unlock(&dev->dev);
1446 return rc;
1447}
1448
1449struct se_io_ctx {
1450 u32 dev_idx;
1451 u32 se_idx;
1452};
1453
1454static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1455{
1456 struct se_io_ctx *ctx = context;
1457 struct sk_buff *msg;
1458 void *hdr;
1459
1460 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1461 if (!msg) {
1462 kfree(ctx);
1463 return;
1464 }
1465
1466 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1467 NFC_CMD_SE_IO);
1468 if (!hdr)
1469 goto free_msg;
1470
1471 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1472 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1473 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1474 goto nla_put_failure;
1475
1476 genlmsg_end(msg, hdr);
1477
1478 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1479
1480 kfree(ctx);
1481
1482 return;
1483
1484nla_put_failure:
1485free_msg:
1486 nlmsg_free(msg);
1487 kfree(ctx);
1488
1489 return;
1490}
1491
1492static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1493{
1494 struct nfc_dev *dev;
1495 struct se_io_ctx *ctx;
1496 u32 dev_idx, se_idx;
1497 u8 *apdu;
1498 size_t apdu_len;
1499
1500 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1501 !info->attrs[NFC_ATTR_SE_INDEX] ||
1502 !info->attrs[NFC_ATTR_SE_APDU])
1503 return -EINVAL;
1504
1505 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1506 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1507
1508 dev = nfc_get_device(dev_idx);
1509 if (!dev)
1510 return -ENODEV;
1511
1512 if (!dev->ops || !dev->ops->se_io)
1513 return -ENOTSUPP;
1514
1515 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1516 if (apdu_len == 0)
1517 return -EINVAL;
1518
1519 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1520 if (!apdu)
1521 return -EINVAL;
1522
1523 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1524 if (!ctx)
1525 return -ENOMEM;
1526
1527 ctx->dev_idx = dev_idx;
1528 ctx->se_idx = se_idx;
1529
1530 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1531}
1532
1533static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1534 struct genl_info *info)
1535{
1536 struct nfc_dev *dev;
1537 struct nfc_vendor_cmd *cmd;
1538 u32 dev_idx, vid, subcmd;
1539 u8 *data;
1540 size_t data_len;
1541 int i, err;
1542
1543 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1544 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1545 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1546 return -EINVAL;
1547
1548 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1549 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1550 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1551
1552 dev = nfc_get_device(dev_idx);
1553 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1554 return -ENODEV;
1555
1556 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1557 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1558 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1559 if (data_len == 0)
1560 return -EINVAL;
1561 } else {
1562 data = NULL;
1563 data_len = 0;
1564 }
1565
1566 for (i = 0; i < dev->n_vendor_cmds; i++) {
1567 cmd = &dev->vendor_cmds[i];
1568
1569 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1570 continue;
1571
1572 dev->cur_cmd_info = info;
1573 err = cmd->doit(dev, data, data_len);
1574 dev->cur_cmd_info = NULL;
1575 return err;
1576 }
1577
1578 return -EOPNOTSUPP;
1579}
1580
1581/* message building helper */
1582static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1583 int flags, u8 cmd)
1584{
1585 /* since there is no private header just add the generic one */
1586 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1587}
1588
1589static struct sk_buff *
1590__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1591 u32 portid, u32 seq,
1592 enum nfc_attrs attr,
1593 u32 oui, u32 subcmd, gfp_t gfp)
1594{
1595 struct sk_buff *skb;
1596 void *hdr;
1597
1598 skb = nlmsg_new(approxlen + 100, gfp);
1599 if (!skb)
1600 return NULL;
1601
1602 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1603 if (!hdr) {
1604 kfree_skb(skb);
1605 return NULL;
1606 }
1607
1608 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1609 goto nla_put_failure;
1610 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1611 goto nla_put_failure;
1612 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1613 goto nla_put_failure;
1614
1615 ((void **)skb->cb)[0] = dev;
1616 ((void **)skb->cb)[1] = hdr;
1617
1618 return skb;
1619
1620nla_put_failure:
1621 kfree_skb(skb);
1622 return NULL;
1623}
1624
1625struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1626 enum nfc_attrs attr,
1627 u32 oui, u32 subcmd,
1628 int approxlen)
1629{
1630 if (WARN_ON(!dev->cur_cmd_info))
1631 return NULL;
1632
1633 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1634 dev->cur_cmd_info->snd_portid,
1635 dev->cur_cmd_info->snd_seq, attr,
1636 oui, subcmd, GFP_KERNEL);
1637}
1638EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1639
1640int nfc_vendor_cmd_reply(struct sk_buff *skb)
1641{
1642 struct nfc_dev *dev = ((void **)skb->cb)[0];
1643 void *hdr = ((void **)skb->cb)[1];
1644
1645 /* clear CB data for netlink core to own from now on */
1646 memset(skb->cb, 0, sizeof(skb->cb));
1647
1648 if (WARN_ON(!dev->cur_cmd_info)) {
1649 kfree_skb(skb);
1650 return -EINVAL;
1651 }
1652
1653 genlmsg_end(skb, hdr);
1654 return genlmsg_reply(skb, dev->cur_cmd_info);
1655}
1656EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1657
1658static const struct genl_ops nfc_genl_ops[] = {
1659 {
1660 .cmd = NFC_CMD_GET_DEVICE,
1661 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1662 .doit = nfc_genl_get_device,
1663 .dumpit = nfc_genl_dump_devices,
1664 .done = nfc_genl_dump_devices_done,
1665 },
1666 {
1667 .cmd = NFC_CMD_DEV_UP,
1668 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1669 .doit = nfc_genl_dev_up,
1670 },
1671 {
1672 .cmd = NFC_CMD_DEV_DOWN,
1673 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1674 .doit = nfc_genl_dev_down,
1675 },
1676 {
1677 .cmd = NFC_CMD_START_POLL,
1678 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1679 .doit = nfc_genl_start_poll,
1680 },
1681 {
1682 .cmd = NFC_CMD_STOP_POLL,
1683 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1684 .doit = nfc_genl_stop_poll,
1685 },
1686 {
1687 .cmd = NFC_CMD_DEP_LINK_UP,
1688 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1689 .doit = nfc_genl_dep_link_up,
1690 },
1691 {
1692 .cmd = NFC_CMD_DEP_LINK_DOWN,
1693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1694 .doit = nfc_genl_dep_link_down,
1695 },
1696 {
1697 .cmd = NFC_CMD_GET_TARGET,
1698 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1699 .dumpit = nfc_genl_dump_targets,
1700 .done = nfc_genl_dump_targets_done,
1701 },
1702 {
1703 .cmd = NFC_CMD_LLC_GET_PARAMS,
1704 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1705 .doit = nfc_genl_llc_get_params,
1706 },
1707 {
1708 .cmd = NFC_CMD_LLC_SET_PARAMS,
1709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1710 .doit = nfc_genl_llc_set_params,
1711 },
1712 {
1713 .cmd = NFC_CMD_LLC_SDREQ,
1714 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1715 .doit = nfc_genl_llc_sdreq,
1716 },
1717 {
1718 .cmd = NFC_CMD_FW_DOWNLOAD,
1719 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1720 .doit = nfc_genl_fw_download,
1721 },
1722 {
1723 .cmd = NFC_CMD_ENABLE_SE,
1724 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1725 .doit = nfc_genl_enable_se,
1726 },
1727 {
1728 .cmd = NFC_CMD_DISABLE_SE,
1729 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1730 .doit = nfc_genl_disable_se,
1731 },
1732 {
1733 .cmd = NFC_CMD_GET_SE,
1734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1735 .dumpit = nfc_genl_dump_ses,
1736 .done = nfc_genl_dump_ses_done,
1737 },
1738 {
1739 .cmd = NFC_CMD_SE_IO,
1740 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1741 .doit = nfc_genl_se_io,
1742 },
1743 {
1744 .cmd = NFC_CMD_ACTIVATE_TARGET,
1745 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1746 .doit = nfc_genl_activate_target,
1747 },
1748 {
1749 .cmd = NFC_CMD_VENDOR,
1750 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1751 .doit = nfc_genl_vendor_cmd,
1752 },
1753 {
1754 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1755 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1756 .doit = nfc_genl_deactivate_target,
1757 },
1758};
1759
1760static struct genl_family nfc_genl_family __ro_after_init = {
1761 .hdrsize = 0,
1762 .name = NFC_GENL_NAME,
1763 .version = NFC_GENL_VERSION,
1764 .maxattr = NFC_ATTR_MAX,
1765 .policy = nfc_genl_policy,
1766 .module = THIS_MODULE,
1767 .ops = nfc_genl_ops,
1768 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1769 .mcgrps = nfc_genl_mcgrps,
1770 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1771};
1772
1773
1774struct urelease_work {
1775 struct work_struct w;
1776 u32 portid;
1777};
1778
1779static void nfc_urelease_event_work(struct work_struct *work)
1780{
1781 struct urelease_work *w = container_of(work, struct urelease_work, w);
1782 struct class_dev_iter iter;
1783 struct nfc_dev *dev;
1784
1785 pr_debug("portid %d\n", w->portid);
1786
1787 mutex_lock(&nfc_devlist_mutex);
1788
1789 nfc_device_iter_init(&iter);
1790 dev = nfc_device_iter_next(&iter);
1791
1792 while (dev) {
1793 mutex_lock(&dev->genl_data.genl_data_mutex);
1794
1795 if (dev->genl_data.poll_req_portid == w->portid) {
1796 nfc_stop_poll(dev);
1797 dev->genl_data.poll_req_portid = 0;
1798 }
1799
1800 mutex_unlock(&dev->genl_data.genl_data_mutex);
1801
1802 dev = nfc_device_iter_next(&iter);
1803 }
1804
1805 nfc_device_iter_exit(&iter);
1806
1807 mutex_unlock(&nfc_devlist_mutex);
1808
1809 kfree(w);
1810}
1811
1812static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1813 unsigned long event, void *ptr)
1814{
1815 struct netlink_notify *n = ptr;
1816 struct urelease_work *w;
1817
1818 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1819 goto out;
1820
1821 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1822
1823 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1824 if (w) {
1825 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1826 w->portid = n->portid;
1827 schedule_work((struct work_struct *) w);
1828 }
1829
1830out:
1831 return NOTIFY_DONE;
1832}
1833
1834void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1835{
1836 genl_data->poll_req_portid = 0;
1837 mutex_init(&genl_data->genl_data_mutex);
1838}
1839
1840void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1841{
1842 mutex_destroy(&genl_data->genl_data_mutex);
1843}
1844
1845static struct notifier_block nl_notifier = {
1846 .notifier_call = nfc_genl_rcv_nl_event,
1847};
1848
1849/**
1850 * nfc_genl_init() - Initialize netlink interface
1851 *
1852 * This initialization function registers the nfc netlink family.
1853 */
1854int __init nfc_genl_init(void)
1855{
1856 int rc;
1857
1858 rc = genl_register_family(&nfc_genl_family);
1859 if (rc)
1860 return rc;
1861
1862 netlink_register_notifier(&nl_notifier);
1863
1864 return 0;
1865}
1866
1867/**
1868 * nfc_genl_exit() - Deinitialize netlink interface
1869 *
1870 * This exit function unregisters the nfc netlink family.
1871 */
1872void nfc_genl_exit(void)
1873{
1874 netlink_unregister_notifier(&nl_notifier);
1875 genl_unregister_family(&nfc_genl_family);
1876}