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