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