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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 .len = U8_MAX - 4 },
66 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
67};
68
69static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
70 struct netlink_callback *cb, int flags)
71{
72 void *hdr;
73
74 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
75 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
76 if (!hdr)
77 return -EMSGSIZE;
78
79 genl_dump_check_consistent(cb, hdr);
80
81 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
82 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
83 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
84 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
85 goto nla_put_failure;
86 if (target->nfcid1_len > 0 &&
87 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
88 target->nfcid1))
89 goto nla_put_failure;
90 if (target->sensb_res_len > 0 &&
91 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
92 target->sensb_res))
93 goto nla_put_failure;
94 if (target->sensf_res_len > 0 &&
95 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
96 target->sensf_res))
97 goto nla_put_failure;
98
99 if (target->is_iso15693) {
100 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
101 target->iso15693_dsfid) ||
102 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
103 sizeof(target->iso15693_uid), target->iso15693_uid))
104 goto nla_put_failure;
105 }
106
107 genlmsg_end(msg, hdr);
108 return 0;
109
110nla_put_failure:
111 genlmsg_cancel(msg, hdr);
112 return -EMSGSIZE;
113}
114
115static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
116{
117 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
118 struct nfc_dev *dev;
119 int rc;
120 u32 idx;
121
122 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
123 attrbuf, nfc_genl_family.maxattr, nfc_genl_policy,
124 NULL);
125 if (rc < 0)
126 return ERR_PTR(rc);
127
128 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
129 return ERR_PTR(-EINVAL);
130
131 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
132
133 dev = nfc_get_device(idx);
134 if (!dev)
135 return ERR_PTR(-ENODEV);
136
137 return dev;
138}
139
140static int nfc_genl_dump_targets(struct sk_buff *skb,
141 struct netlink_callback *cb)
142{
143 int i = cb->args[0];
144 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
145 int rc;
146
147 if (!dev) {
148 dev = __get_device_from_cb(cb);
149 if (IS_ERR(dev))
150 return PTR_ERR(dev);
151
152 cb->args[1] = (long) dev;
153 }
154
155 device_lock(&dev->dev);
156
157 cb->seq = dev->targets_generation;
158
159 while (i < dev->n_targets) {
160 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
161 NLM_F_MULTI);
162 if (rc < 0)
163 break;
164
165 i++;
166 }
167
168 device_unlock(&dev->dev);
169
170 cb->args[0] = i;
171
172 return skb->len;
173}
174
175static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
176{
177 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
178
179 if (dev)
180 nfc_put_device(dev);
181
182 return 0;
183}
184
185int nfc_genl_targets_found(struct nfc_dev *dev)
186{
187 struct sk_buff *msg;
188 void *hdr;
189
190 dev->genl_data.poll_req_portid = 0;
191
192 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
193 if (!msg)
194 return -ENOMEM;
195
196 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
197 NFC_EVENT_TARGETS_FOUND);
198 if (!hdr)
199 goto free_msg;
200
201 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
202 goto nla_put_failure;
203
204 genlmsg_end(msg, hdr);
205
206 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
207
208nla_put_failure:
209 genlmsg_cancel(msg, hdr);
210free_msg:
211 nlmsg_free(msg);
212 return -EMSGSIZE;
213}
214
215int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
216{
217 struct sk_buff *msg;
218 void *hdr;
219
220 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
221 if (!msg)
222 return -ENOMEM;
223
224 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
225 NFC_EVENT_TARGET_LOST);
226 if (!hdr)
227 goto free_msg;
228
229 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
230 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
231 goto nla_put_failure;
232
233 genlmsg_end(msg, hdr);
234
235 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
236
237 return 0;
238
239nla_put_failure:
240 genlmsg_cancel(msg, hdr);
241free_msg:
242 nlmsg_free(msg);
243 return -EMSGSIZE;
244}
245
246int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
247{
248 struct sk_buff *msg;
249 void *hdr;
250
251 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
252 if (!msg)
253 return -ENOMEM;
254
255 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
256 NFC_EVENT_TM_ACTIVATED);
257 if (!hdr)
258 goto free_msg;
259
260 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
261 goto nla_put_failure;
262 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
263 goto nla_put_failure;
264
265 genlmsg_end(msg, hdr);
266
267 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
268
269 return 0;
270
271nla_put_failure:
272 genlmsg_cancel(msg, hdr);
273free_msg:
274 nlmsg_free(msg);
275 return -EMSGSIZE;
276}
277
278int nfc_genl_tm_deactivated(struct nfc_dev *dev)
279{
280 struct sk_buff *msg;
281 void *hdr;
282
283 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
284 if (!msg)
285 return -ENOMEM;
286
287 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
288 NFC_EVENT_TM_DEACTIVATED);
289 if (!hdr)
290 goto free_msg;
291
292 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
293 goto nla_put_failure;
294
295 genlmsg_end(msg, hdr);
296
297 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
298
299 return 0;
300
301nla_put_failure:
302 genlmsg_cancel(msg, hdr);
303free_msg:
304 nlmsg_free(msg);
305 return -EMSGSIZE;
306}
307
308static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
309{
310 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
311 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
312 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
313 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
314 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
315 return -1;
316 return 0;
317}
318
319int nfc_genl_device_added(struct nfc_dev *dev)
320{
321 struct sk_buff *msg;
322 void *hdr;
323
324 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
325 if (!msg)
326 return -ENOMEM;
327
328 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
329 NFC_EVENT_DEVICE_ADDED);
330 if (!hdr)
331 goto free_msg;
332
333 if (nfc_genl_setup_device_added(dev, msg))
334 goto nla_put_failure;
335
336 genlmsg_end(msg, hdr);
337
338 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
339
340 return 0;
341
342nla_put_failure:
343 genlmsg_cancel(msg, hdr);
344free_msg:
345 nlmsg_free(msg);
346 return -EMSGSIZE;
347}
348
349int nfc_genl_device_removed(struct nfc_dev *dev)
350{
351 struct sk_buff *msg;
352 void *hdr;
353
354 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
355 if (!msg)
356 return -ENOMEM;
357
358 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
359 NFC_EVENT_DEVICE_REMOVED);
360 if (!hdr)
361 goto free_msg;
362
363 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
364 goto nla_put_failure;
365
366 genlmsg_end(msg, hdr);
367
368 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
369
370 return 0;
371
372nla_put_failure:
373 genlmsg_cancel(msg, hdr);
374free_msg:
375 nlmsg_free(msg);
376 return -EMSGSIZE;
377}
378
379int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
380{
381 struct sk_buff *msg;
382 struct nlattr *sdp_attr, *uri_attr;
383 struct nfc_llcp_sdp_tlv *sdres;
384 struct hlist_node *n;
385 void *hdr;
386 int rc = -EMSGSIZE;
387 int i;
388
389 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
390 if (!msg)
391 return -ENOMEM;
392
393 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
394 NFC_EVENT_LLC_SDRES);
395 if (!hdr)
396 goto free_msg;
397
398 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
399 goto nla_put_failure;
400
401 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
402 if (sdp_attr == NULL) {
403 rc = -ENOMEM;
404 goto nla_put_failure;
405 }
406
407 i = 1;
408 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
409 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
410
411 uri_attr = nla_nest_start(msg, i++);
412 if (uri_attr == NULL) {
413 rc = -ENOMEM;
414 goto nla_put_failure;
415 }
416
417 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
418 goto nla_put_failure;
419
420 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
421 goto nla_put_failure;
422
423 nla_nest_end(msg, uri_attr);
424
425 hlist_del(&sdres->node);
426
427 nfc_llcp_free_sdp_tlv(sdres);
428 }
429
430 nla_nest_end(msg, sdp_attr);
431
432 genlmsg_end(msg, hdr);
433
434 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
435
436nla_put_failure:
437 genlmsg_cancel(msg, hdr);
438
439free_msg:
440 nlmsg_free(msg);
441
442 nfc_llcp_free_sdp_tlv_list(sdres_list);
443
444 return rc;
445}
446
447int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
448{
449 struct sk_buff *msg;
450 void *hdr;
451
452 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
453 if (!msg)
454 return -ENOMEM;
455
456 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
457 NFC_EVENT_SE_ADDED);
458 if (!hdr)
459 goto free_msg;
460
461 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
462 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
463 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
464 goto nla_put_failure;
465
466 genlmsg_end(msg, hdr);
467
468 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
469
470 return 0;
471
472nla_put_failure:
473 genlmsg_cancel(msg, hdr);
474free_msg:
475 nlmsg_free(msg);
476 return -EMSGSIZE;
477}
478
479int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
480{
481 struct sk_buff *msg;
482 void *hdr;
483
484 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
485 if (!msg)
486 return -ENOMEM;
487
488 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
489 NFC_EVENT_SE_REMOVED);
490 if (!hdr)
491 goto free_msg;
492
493 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
494 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
495 goto nla_put_failure;
496
497 genlmsg_end(msg, hdr);
498
499 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
500
501 return 0;
502
503nla_put_failure:
504 genlmsg_cancel(msg, hdr);
505free_msg:
506 nlmsg_free(msg);
507 return -EMSGSIZE;
508}
509
510int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
511 struct nfc_evt_transaction *evt_transaction)
512{
513 struct nfc_se *se;
514 struct sk_buff *msg;
515 void *hdr;
516
517 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
518 if (!msg)
519 return -ENOMEM;
520
521 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
522 NFC_EVENT_SE_TRANSACTION);
523 if (!hdr)
524 goto free_msg;
525
526 se = nfc_find_se(dev, se_idx);
527 if (!se)
528 goto free_msg;
529
530 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
531 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
532 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
533 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
534 evt_transaction->aid) ||
535 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
536 evt_transaction->params))
537 goto nla_put_failure;
538
539 /* evt_transaction is no more used */
540 devm_kfree(&dev->dev, evt_transaction);
541
542 genlmsg_end(msg, hdr);
543
544 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
545
546 return 0;
547
548nla_put_failure:
549 genlmsg_cancel(msg, hdr);
550free_msg:
551 /* evt_transaction is no more used */
552 devm_kfree(&dev->dev, evt_transaction);
553 nlmsg_free(msg);
554 return -EMSGSIZE;
555}
556
557int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
558{
559 struct nfc_se *se;
560 struct sk_buff *msg;
561 void *hdr;
562
563 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
564 if (!msg)
565 return -ENOMEM;
566
567 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
568 NFC_EVENT_SE_CONNECTIVITY);
569 if (!hdr)
570 goto free_msg;
571
572 se = nfc_find_se(dev, se_idx);
573 if (!se)
574 goto free_msg;
575
576 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
577 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
578 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
579 goto nla_put_failure;
580
581 genlmsg_end(msg, hdr);
582
583 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
584
585 return 0;
586
587nla_put_failure:
588 genlmsg_cancel(msg, hdr);
589free_msg:
590 nlmsg_free(msg);
591 return -EMSGSIZE;
592}
593
594static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
595 u32 portid, u32 seq,
596 struct netlink_callback *cb,
597 int flags)
598{
599 void *hdr;
600
601 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
602 NFC_CMD_GET_DEVICE);
603 if (!hdr)
604 return -EMSGSIZE;
605
606 if (cb)
607 genl_dump_check_consistent(cb, hdr);
608
609 if (nfc_genl_setup_device_added(dev, msg))
610 goto nla_put_failure;
611
612 genlmsg_end(msg, hdr);
613 return 0;
614
615nla_put_failure:
616 genlmsg_cancel(msg, hdr);
617 return -EMSGSIZE;
618}
619
620static int nfc_genl_dump_devices(struct sk_buff *skb,
621 struct netlink_callback *cb)
622{
623 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
624 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
625 bool first_call = false;
626
627 if (!iter) {
628 first_call = true;
629 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
630 if (!iter)
631 return -ENOMEM;
632 cb->args[0] = (long) iter;
633 }
634
635 mutex_lock(&nfc_devlist_mutex);
636
637 cb->seq = nfc_devlist_generation;
638
639 if (first_call) {
640 nfc_device_iter_init(iter);
641 dev = nfc_device_iter_next(iter);
642 }
643
644 while (dev) {
645 int rc;
646
647 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
648 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
649 if (rc < 0)
650 break;
651
652 dev = nfc_device_iter_next(iter);
653 }
654
655 mutex_unlock(&nfc_devlist_mutex);
656
657 cb->args[1] = (long) dev;
658
659 return skb->len;
660}
661
662static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
663{
664 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
665
666 nfc_device_iter_exit(iter);
667 kfree(iter);
668
669 return 0;
670}
671
672int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
673 u8 comm_mode, u8 rf_mode)
674{
675 struct sk_buff *msg;
676 void *hdr;
677
678 pr_debug("DEP link is up\n");
679
680 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
681 if (!msg)
682 return -ENOMEM;
683
684 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
685 if (!hdr)
686 goto free_msg;
687
688 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
689 goto nla_put_failure;
690 if (rf_mode == NFC_RF_INITIATOR &&
691 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
692 goto nla_put_failure;
693 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
694 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
695 goto nla_put_failure;
696
697 genlmsg_end(msg, hdr);
698
699 dev->dep_link_up = true;
700
701 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
702
703 return 0;
704
705nla_put_failure:
706 genlmsg_cancel(msg, hdr);
707free_msg:
708 nlmsg_free(msg);
709 return -EMSGSIZE;
710}
711
712int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
713{
714 struct sk_buff *msg;
715 void *hdr;
716
717 pr_debug("DEP link is down\n");
718
719 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
720 if (!msg)
721 return -ENOMEM;
722
723 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
724 NFC_CMD_DEP_LINK_DOWN);
725 if (!hdr)
726 goto free_msg;
727
728 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
729 goto nla_put_failure;
730
731 genlmsg_end(msg, hdr);
732
733 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
734
735 return 0;
736
737nla_put_failure:
738 genlmsg_cancel(msg, hdr);
739free_msg:
740 nlmsg_free(msg);
741 return -EMSGSIZE;
742}
743
744static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
745{
746 struct sk_buff *msg;
747 struct nfc_dev *dev;
748 u32 idx;
749 int rc = -ENOBUFS;
750
751 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
752 return -EINVAL;
753
754 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
755
756 dev = nfc_get_device(idx);
757 if (!dev)
758 return -ENODEV;
759
760 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
761 if (!msg) {
762 rc = -ENOMEM;
763 goto out_putdev;
764 }
765
766 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
767 NULL, 0);
768 if (rc < 0)
769 goto out_free;
770
771 nfc_put_device(dev);
772
773 return genlmsg_reply(msg, info);
774
775out_free:
776 nlmsg_free(msg);
777out_putdev:
778 nfc_put_device(dev);
779 return rc;
780}
781
782static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
783{
784 struct nfc_dev *dev;
785 int rc;
786 u32 idx;
787
788 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
789 return -EINVAL;
790
791 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
792
793 dev = nfc_get_device(idx);
794 if (!dev)
795 return -ENODEV;
796
797 rc = nfc_dev_up(dev);
798
799 nfc_put_device(dev);
800 return rc;
801}
802
803static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
804{
805 struct nfc_dev *dev;
806 int rc;
807 u32 idx;
808
809 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
810 return -EINVAL;
811
812 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
813
814 dev = nfc_get_device(idx);
815 if (!dev)
816 return -ENODEV;
817
818 rc = nfc_dev_down(dev);
819
820 nfc_put_device(dev);
821 return rc;
822}
823
824static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
825{
826 struct nfc_dev *dev;
827 int rc;
828 u32 idx;
829 u32 im_protocols = 0, tm_protocols = 0;
830
831 pr_debug("Poll start\n");
832
833 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
834 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
835 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
836 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
837 return -EINVAL;
838
839 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
840
841 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
842 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
843
844 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
845 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
846 else if (info->attrs[NFC_ATTR_PROTOCOLS])
847 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
848
849 dev = nfc_get_device(idx);
850 if (!dev)
851 return -ENODEV;
852
853 mutex_lock(&dev->genl_data.genl_data_mutex);
854
855 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
856 if (!rc)
857 dev->genl_data.poll_req_portid = info->snd_portid;
858
859 mutex_unlock(&dev->genl_data.genl_data_mutex);
860
861 nfc_put_device(dev);
862 return rc;
863}
864
865static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
866{
867 struct nfc_dev *dev;
868 int rc;
869 u32 idx;
870
871 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
872 return -EINVAL;
873
874 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
875
876 dev = nfc_get_device(idx);
877 if (!dev)
878 return -ENODEV;
879
880 device_lock(&dev->dev);
881
882 if (!dev->polling) {
883 device_unlock(&dev->dev);
884 return -EINVAL;
885 }
886
887 device_unlock(&dev->dev);
888
889 mutex_lock(&dev->genl_data.genl_data_mutex);
890
891 if (dev->genl_data.poll_req_portid != info->snd_portid) {
892 rc = -EBUSY;
893 goto out;
894 }
895
896 rc = nfc_stop_poll(dev);
897 dev->genl_data.poll_req_portid = 0;
898
899out:
900 mutex_unlock(&dev->genl_data.genl_data_mutex);
901 nfc_put_device(dev);
902 return rc;
903}
904
905static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
906{
907 struct nfc_dev *dev;
908 u32 device_idx, target_idx, protocol;
909 int rc;
910
911 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
912 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
913 !info->attrs[NFC_ATTR_PROTOCOLS])
914 return -EINVAL;
915
916 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
917
918 dev = nfc_get_device(device_idx);
919 if (!dev)
920 return -ENODEV;
921
922 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
923 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
924
925 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
926 rc = nfc_activate_target(dev, target_idx, protocol);
927
928 nfc_put_device(dev);
929 return rc;
930}
931
932static int nfc_genl_deactivate_target(struct sk_buff *skb,
933 struct genl_info *info)
934{
935 struct nfc_dev *dev;
936 u32 device_idx, target_idx;
937 int rc;
938
939 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
940 return -EINVAL;
941
942 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
943
944 dev = nfc_get_device(device_idx);
945 if (!dev)
946 return -ENODEV;
947
948 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
949
950 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
951
952 nfc_put_device(dev);
953 return rc;
954}
955
956static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
957{
958 struct nfc_dev *dev;
959 int rc, tgt_idx;
960 u32 idx;
961 u8 comm;
962
963 pr_debug("DEP link up\n");
964
965 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
966 !info->attrs[NFC_ATTR_COMM_MODE])
967 return -EINVAL;
968
969 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
970 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
971 tgt_idx = NFC_TARGET_IDX_ANY;
972 else
973 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
974
975 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
976
977 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
978 return -EINVAL;
979
980 dev = nfc_get_device(idx);
981 if (!dev)
982 return -ENODEV;
983
984 rc = nfc_dep_link_up(dev, tgt_idx, comm);
985
986 nfc_put_device(dev);
987
988 return rc;
989}
990
991static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
992{
993 struct nfc_dev *dev;
994 int rc;
995 u32 idx;
996
997 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
998 return -EINVAL;
999
1000 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1001
1002 dev = nfc_get_device(idx);
1003 if (!dev)
1004 return -ENODEV;
1005
1006 rc = nfc_dep_link_down(dev);
1007
1008 nfc_put_device(dev);
1009 return rc;
1010}
1011
1012static int nfc_genl_send_params(struct sk_buff *msg,
1013 struct nfc_llcp_local *local,
1014 u32 portid, u32 seq)
1015{
1016 void *hdr;
1017
1018 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
1019 NFC_CMD_LLC_GET_PARAMS);
1020 if (!hdr)
1021 return -EMSGSIZE;
1022
1023 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1024 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1025 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1026 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1027 goto nla_put_failure;
1028
1029 genlmsg_end(msg, hdr);
1030 return 0;
1031
1032nla_put_failure:
1033
1034 genlmsg_cancel(msg, hdr);
1035 return -EMSGSIZE;
1036}
1037
1038static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1039{
1040 struct nfc_dev *dev;
1041 struct nfc_llcp_local *local;
1042 int rc = 0;
1043 struct sk_buff *msg = NULL;
1044 u32 idx;
1045
1046 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1047 return -EINVAL;
1048
1049 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1050
1051 dev = nfc_get_device(idx);
1052 if (!dev)
1053 return -ENODEV;
1054
1055 device_lock(&dev->dev);
1056
1057 local = nfc_llcp_find_local(dev);
1058 if (!local) {
1059 rc = -ENODEV;
1060 goto exit;
1061 }
1062
1063 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1064 if (!msg) {
1065 rc = -ENOMEM;
1066 goto exit;
1067 }
1068
1069 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1070
1071exit:
1072 device_unlock(&dev->dev);
1073
1074 nfc_put_device(dev);
1075
1076 if (rc < 0) {
1077 if (msg)
1078 nlmsg_free(msg);
1079
1080 return rc;
1081 }
1082
1083 return genlmsg_reply(msg, info);
1084}
1085
1086static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1087{
1088 struct nfc_dev *dev;
1089 struct nfc_llcp_local *local;
1090 u8 rw = 0;
1091 u16 miux = 0;
1092 u32 idx;
1093 int rc = 0;
1094
1095 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1096 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1097 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1098 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1099 return -EINVAL;
1100
1101 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1102 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1103
1104 if (rw > LLCP_MAX_RW)
1105 return -EINVAL;
1106 }
1107
1108 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1109 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1110
1111 if (miux > LLCP_MAX_MIUX)
1112 return -EINVAL;
1113 }
1114
1115 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1116
1117 dev = nfc_get_device(idx);
1118 if (!dev)
1119 return -ENODEV;
1120
1121 device_lock(&dev->dev);
1122
1123 local = nfc_llcp_find_local(dev);
1124 if (!local) {
1125 nfc_put_device(dev);
1126 rc = -ENODEV;
1127 goto exit;
1128 }
1129
1130 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1131 if (dev->dep_link_up) {
1132 rc = -EINPROGRESS;
1133 goto exit;
1134 }
1135
1136 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1137 }
1138
1139 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1140 local->rw = rw;
1141
1142 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1143 local->miux = cpu_to_be16(miux);
1144
1145exit:
1146 device_unlock(&dev->dev);
1147
1148 nfc_put_device(dev);
1149
1150 return rc;
1151}
1152
1153static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1154{
1155 struct nfc_dev *dev;
1156 struct nfc_llcp_local *local;
1157 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1158 u32 idx;
1159 u8 tid;
1160 char *uri;
1161 int rc = 0, rem;
1162 size_t uri_len, tlvs_len;
1163 struct hlist_head sdreq_list;
1164 struct nfc_llcp_sdp_tlv *sdreq;
1165
1166 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1167 !info->attrs[NFC_ATTR_LLC_SDP])
1168 return -EINVAL;
1169
1170 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1171
1172 dev = nfc_get_device(idx);
1173 if (!dev)
1174 return -ENODEV;
1175
1176 device_lock(&dev->dev);
1177
1178 if (dev->dep_link_up == false) {
1179 rc = -ENOLINK;
1180 goto exit;
1181 }
1182
1183 local = nfc_llcp_find_local(dev);
1184 if (!local) {
1185 nfc_put_device(dev);
1186 rc = -ENODEV;
1187 goto exit;
1188 }
1189
1190 INIT_HLIST_HEAD(&sdreq_list);
1191
1192 tlvs_len = 0;
1193
1194 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1195 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1196 nfc_sdp_genl_policy, info->extack);
1197
1198 if (rc != 0) {
1199 rc = -EINVAL;
1200 goto exit;
1201 }
1202
1203 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1204 continue;
1205
1206 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1207 if (uri_len == 0)
1208 continue;
1209
1210 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1211 if (uri == NULL || *uri == 0)
1212 continue;
1213
1214 tid = local->sdreq_next_tid++;
1215
1216 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1217 if (sdreq == NULL) {
1218 rc = -ENOMEM;
1219 goto exit;
1220 }
1221
1222 tlvs_len += sdreq->tlv_len;
1223
1224 hlist_add_head(&sdreq->node, &sdreq_list);
1225 }
1226
1227 if (hlist_empty(&sdreq_list)) {
1228 rc = -EINVAL;
1229 goto exit;
1230 }
1231
1232 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1233exit:
1234 device_unlock(&dev->dev);
1235
1236 nfc_put_device(dev);
1237
1238 return rc;
1239}
1240
1241static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1242{
1243 struct nfc_dev *dev;
1244 int rc;
1245 u32 idx;
1246 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1247
1248 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1249 return -EINVAL;
1250
1251 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1252
1253 dev = nfc_get_device(idx);
1254 if (!dev)
1255 return -ENODEV;
1256
1257 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1258 sizeof(firmware_name));
1259
1260 rc = nfc_fw_download(dev, firmware_name);
1261
1262 nfc_put_device(dev);
1263 return rc;
1264}
1265
1266int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1267 u32 result)
1268{
1269 struct sk_buff *msg;
1270 void *hdr;
1271
1272 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1273 if (!msg)
1274 return -ENOMEM;
1275
1276 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1277 NFC_CMD_FW_DOWNLOAD);
1278 if (!hdr)
1279 goto free_msg;
1280
1281 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1282 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1283 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1284 goto nla_put_failure;
1285
1286 genlmsg_end(msg, hdr);
1287
1288 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1289
1290 return 0;
1291
1292nla_put_failure:
1293 genlmsg_cancel(msg, hdr);
1294free_msg:
1295 nlmsg_free(msg);
1296 return -EMSGSIZE;
1297}
1298
1299static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1300{
1301 struct nfc_dev *dev;
1302 int rc;
1303 u32 idx, se_idx;
1304
1305 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1306 !info->attrs[NFC_ATTR_SE_INDEX])
1307 return -EINVAL;
1308
1309 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1310 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1311
1312 dev = nfc_get_device(idx);
1313 if (!dev)
1314 return -ENODEV;
1315
1316 rc = nfc_enable_se(dev, se_idx);
1317
1318 nfc_put_device(dev);
1319 return rc;
1320}
1321
1322static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1323{
1324 struct nfc_dev *dev;
1325 int rc;
1326 u32 idx, se_idx;
1327
1328 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1329 !info->attrs[NFC_ATTR_SE_INDEX])
1330 return -EINVAL;
1331
1332 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1333 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1334
1335 dev = nfc_get_device(idx);
1336 if (!dev)
1337 return -ENODEV;
1338
1339 rc = nfc_disable_se(dev, se_idx);
1340
1341 nfc_put_device(dev);
1342 return rc;
1343}
1344
1345static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1346 u32 portid, u32 seq,
1347 struct netlink_callback *cb,
1348 int flags)
1349{
1350 void *hdr;
1351 struct nfc_se *se, *n;
1352
1353 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1354 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1355 NFC_CMD_GET_SE);
1356 if (!hdr)
1357 goto nla_put_failure;
1358
1359 if (cb)
1360 genl_dump_check_consistent(cb, hdr);
1361
1362 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1363 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1364 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1365 goto nla_put_failure;
1366
1367 genlmsg_end(msg, hdr);
1368 }
1369
1370 return 0;
1371
1372nla_put_failure:
1373 genlmsg_cancel(msg, hdr);
1374 return -EMSGSIZE;
1375}
1376
1377static int nfc_genl_dump_ses(struct sk_buff *skb,
1378 struct netlink_callback *cb)
1379{
1380 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1381 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1382 bool first_call = false;
1383
1384 if (!iter) {
1385 first_call = true;
1386 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1387 if (!iter)
1388 return -ENOMEM;
1389 cb->args[0] = (long) iter;
1390 }
1391
1392 mutex_lock(&nfc_devlist_mutex);
1393
1394 cb->seq = nfc_devlist_generation;
1395
1396 if (first_call) {
1397 nfc_device_iter_init(iter);
1398 dev = nfc_device_iter_next(iter);
1399 }
1400
1401 while (dev) {
1402 int rc;
1403
1404 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1405 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1406 if (rc < 0)
1407 break;
1408
1409 dev = nfc_device_iter_next(iter);
1410 }
1411
1412 mutex_unlock(&nfc_devlist_mutex);
1413
1414 cb->args[1] = (long) dev;
1415
1416 return skb->len;
1417}
1418
1419static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1420{
1421 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1422
1423 nfc_device_iter_exit(iter);
1424 kfree(iter);
1425
1426 return 0;
1427}
1428
1429static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1430 u8 *apdu, size_t apdu_length,
1431 se_io_cb_t cb, void *cb_context)
1432{
1433 struct nfc_se *se;
1434 int rc;
1435
1436 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1437
1438 device_lock(&dev->dev);
1439
1440 if (!device_is_registered(&dev->dev)) {
1441 rc = -ENODEV;
1442 goto error;
1443 }
1444
1445 if (!dev->dev_up) {
1446 rc = -ENODEV;
1447 goto error;
1448 }
1449
1450 if (!dev->ops->se_io) {
1451 rc = -EOPNOTSUPP;
1452 goto error;
1453 }
1454
1455 se = nfc_find_se(dev, se_idx);
1456 if (!se) {
1457 rc = -EINVAL;
1458 goto error;
1459 }
1460
1461 if (se->state != NFC_SE_ENABLED) {
1462 rc = -ENODEV;
1463 goto error;
1464 }
1465
1466 rc = dev->ops->se_io(dev, se_idx, apdu,
1467 apdu_length, cb, cb_context);
1468
1469error:
1470 device_unlock(&dev->dev);
1471 return rc;
1472}
1473
1474struct se_io_ctx {
1475 u32 dev_idx;
1476 u32 se_idx;
1477};
1478
1479static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1480{
1481 struct se_io_ctx *ctx = context;
1482 struct sk_buff *msg;
1483 void *hdr;
1484
1485 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1486 if (!msg) {
1487 kfree(ctx);
1488 return;
1489 }
1490
1491 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1492 NFC_CMD_SE_IO);
1493 if (!hdr)
1494 goto free_msg;
1495
1496 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1497 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1498 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1499 goto nla_put_failure;
1500
1501 genlmsg_end(msg, hdr);
1502
1503 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1504
1505 kfree(ctx);
1506
1507 return;
1508
1509nla_put_failure:
1510 genlmsg_cancel(msg, hdr);
1511free_msg:
1512 nlmsg_free(msg);
1513 kfree(ctx);
1514
1515 return;
1516}
1517
1518static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1519{
1520 struct nfc_dev *dev;
1521 struct se_io_ctx *ctx;
1522 u32 dev_idx, se_idx;
1523 u8 *apdu;
1524 size_t apdu_len;
1525
1526 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1527 !info->attrs[NFC_ATTR_SE_INDEX] ||
1528 !info->attrs[NFC_ATTR_SE_APDU])
1529 return -EINVAL;
1530
1531 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1532 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1533
1534 dev = nfc_get_device(dev_idx);
1535 if (!dev)
1536 return -ENODEV;
1537
1538 if (!dev->ops || !dev->ops->se_io)
1539 return -ENOTSUPP;
1540
1541 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1542 if (apdu_len == 0)
1543 return -EINVAL;
1544
1545 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1546 if (!apdu)
1547 return -EINVAL;
1548
1549 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1550 if (!ctx)
1551 return -ENOMEM;
1552
1553 ctx->dev_idx = dev_idx;
1554 ctx->se_idx = se_idx;
1555
1556 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1557}
1558
1559static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1560 struct genl_info *info)
1561{
1562 struct nfc_dev *dev;
1563 struct nfc_vendor_cmd *cmd;
1564 u32 dev_idx, vid, subcmd;
1565 u8 *data;
1566 size_t data_len;
1567 int i, err;
1568
1569 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1570 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1571 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1572 return -EINVAL;
1573
1574 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1575 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1576 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1577
1578 dev = nfc_get_device(dev_idx);
1579 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1580 return -ENODEV;
1581
1582 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1583 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1584 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1585 if (data_len == 0)
1586 return -EINVAL;
1587 } else {
1588 data = NULL;
1589 data_len = 0;
1590 }
1591
1592 for (i = 0; i < dev->n_vendor_cmds; i++) {
1593 cmd = &dev->vendor_cmds[i];
1594
1595 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1596 continue;
1597
1598 dev->cur_cmd_info = info;
1599 err = cmd->doit(dev, data, data_len);
1600 dev->cur_cmd_info = NULL;
1601 return err;
1602 }
1603
1604 return -EOPNOTSUPP;
1605}
1606
1607/* message building helper */
1608static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1609 int flags, u8 cmd)
1610{
1611 /* since there is no private header just add the generic one */
1612 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1613}
1614
1615static struct sk_buff *
1616__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1617 u32 portid, u32 seq,
1618 enum nfc_attrs attr,
1619 u32 oui, u32 subcmd, gfp_t gfp)
1620{
1621 struct sk_buff *skb;
1622 void *hdr;
1623
1624 skb = nlmsg_new(approxlen + 100, gfp);
1625 if (!skb)
1626 return NULL;
1627
1628 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1629 if (!hdr) {
1630 kfree_skb(skb);
1631 return NULL;
1632 }
1633
1634 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1635 goto nla_put_failure;
1636 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1637 goto nla_put_failure;
1638 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1639 goto nla_put_failure;
1640
1641 ((void **)skb->cb)[0] = dev;
1642 ((void **)skb->cb)[1] = hdr;
1643
1644 return skb;
1645
1646nla_put_failure:
1647 kfree_skb(skb);
1648 return NULL;
1649}
1650
1651struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1652 enum nfc_attrs attr,
1653 u32 oui, u32 subcmd,
1654 int approxlen)
1655{
1656 if (WARN_ON(!dev->cur_cmd_info))
1657 return NULL;
1658
1659 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1660 dev->cur_cmd_info->snd_portid,
1661 dev->cur_cmd_info->snd_seq, attr,
1662 oui, subcmd, GFP_KERNEL);
1663}
1664EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1665
1666int nfc_vendor_cmd_reply(struct sk_buff *skb)
1667{
1668 struct nfc_dev *dev = ((void **)skb->cb)[0];
1669 void *hdr = ((void **)skb->cb)[1];
1670
1671 /* clear CB data for netlink core to own from now on */
1672 memset(skb->cb, 0, sizeof(skb->cb));
1673
1674 if (WARN_ON(!dev->cur_cmd_info)) {
1675 kfree_skb(skb);
1676 return -EINVAL;
1677 }
1678
1679 genlmsg_end(skb, hdr);
1680 return genlmsg_reply(skb, dev->cur_cmd_info);
1681}
1682EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1683
1684static const struct genl_ops nfc_genl_ops[] = {
1685 {
1686 .cmd = NFC_CMD_GET_DEVICE,
1687 .doit = nfc_genl_get_device,
1688 .dumpit = nfc_genl_dump_devices,
1689 .done = nfc_genl_dump_devices_done,
1690 .policy = nfc_genl_policy,
1691 },
1692 {
1693 .cmd = NFC_CMD_DEV_UP,
1694 .doit = nfc_genl_dev_up,
1695 .policy = nfc_genl_policy,
1696 },
1697 {
1698 .cmd = NFC_CMD_DEV_DOWN,
1699 .doit = nfc_genl_dev_down,
1700 .policy = nfc_genl_policy,
1701 },
1702 {
1703 .cmd = NFC_CMD_START_POLL,
1704 .doit = nfc_genl_start_poll,
1705 .policy = nfc_genl_policy,
1706 },
1707 {
1708 .cmd = NFC_CMD_STOP_POLL,
1709 .doit = nfc_genl_stop_poll,
1710 .policy = nfc_genl_policy,
1711 },
1712 {
1713 .cmd = NFC_CMD_DEP_LINK_UP,
1714 .doit = nfc_genl_dep_link_up,
1715 .policy = nfc_genl_policy,
1716 },
1717 {
1718 .cmd = NFC_CMD_DEP_LINK_DOWN,
1719 .doit = nfc_genl_dep_link_down,
1720 .policy = nfc_genl_policy,
1721 },
1722 {
1723 .cmd = NFC_CMD_GET_TARGET,
1724 .dumpit = nfc_genl_dump_targets,
1725 .done = nfc_genl_dump_targets_done,
1726 .policy = nfc_genl_policy,
1727 },
1728 {
1729 .cmd = NFC_CMD_LLC_GET_PARAMS,
1730 .doit = nfc_genl_llc_get_params,
1731 .policy = nfc_genl_policy,
1732 },
1733 {
1734 .cmd = NFC_CMD_LLC_SET_PARAMS,
1735 .doit = nfc_genl_llc_set_params,
1736 .policy = nfc_genl_policy,
1737 },
1738 {
1739 .cmd = NFC_CMD_LLC_SDREQ,
1740 .doit = nfc_genl_llc_sdreq,
1741 .policy = nfc_genl_policy,
1742 },
1743 {
1744 .cmd = NFC_CMD_FW_DOWNLOAD,
1745 .doit = nfc_genl_fw_download,
1746 .policy = nfc_genl_policy,
1747 },
1748 {
1749 .cmd = NFC_CMD_ENABLE_SE,
1750 .doit = nfc_genl_enable_se,
1751 .policy = nfc_genl_policy,
1752 },
1753 {
1754 .cmd = NFC_CMD_DISABLE_SE,
1755 .doit = nfc_genl_disable_se,
1756 .policy = nfc_genl_policy,
1757 },
1758 {
1759 .cmd = NFC_CMD_GET_SE,
1760 .dumpit = nfc_genl_dump_ses,
1761 .done = nfc_genl_dump_ses_done,
1762 .policy = nfc_genl_policy,
1763 },
1764 {
1765 .cmd = NFC_CMD_SE_IO,
1766 .doit = nfc_genl_se_io,
1767 .policy = nfc_genl_policy,
1768 },
1769 {
1770 .cmd = NFC_CMD_ACTIVATE_TARGET,
1771 .doit = nfc_genl_activate_target,
1772 .policy = nfc_genl_policy,
1773 },
1774 {
1775 .cmd = NFC_CMD_VENDOR,
1776 .doit = nfc_genl_vendor_cmd,
1777 .policy = nfc_genl_policy,
1778 },
1779 {
1780 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1781 .doit = nfc_genl_deactivate_target,
1782 .policy = nfc_genl_policy,
1783 },
1784};
1785
1786static struct genl_family nfc_genl_family __ro_after_init = {
1787 .hdrsize = 0,
1788 .name = NFC_GENL_NAME,
1789 .version = NFC_GENL_VERSION,
1790 .maxattr = NFC_ATTR_MAX,
1791 .module = THIS_MODULE,
1792 .ops = nfc_genl_ops,
1793 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1794 .mcgrps = nfc_genl_mcgrps,
1795 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1796};
1797
1798
1799struct urelease_work {
1800 struct work_struct w;
1801 u32 portid;
1802};
1803
1804static void nfc_urelease_event_work(struct work_struct *work)
1805{
1806 struct urelease_work *w = container_of(work, struct urelease_work, w);
1807 struct class_dev_iter iter;
1808 struct nfc_dev *dev;
1809
1810 pr_debug("portid %d\n", w->portid);
1811
1812 mutex_lock(&nfc_devlist_mutex);
1813
1814 nfc_device_iter_init(&iter);
1815 dev = nfc_device_iter_next(&iter);
1816
1817 while (dev) {
1818 mutex_lock(&dev->genl_data.genl_data_mutex);
1819
1820 if (dev->genl_data.poll_req_portid == w->portid) {
1821 nfc_stop_poll(dev);
1822 dev->genl_data.poll_req_portid = 0;
1823 }
1824
1825 mutex_unlock(&dev->genl_data.genl_data_mutex);
1826
1827 dev = nfc_device_iter_next(&iter);
1828 }
1829
1830 nfc_device_iter_exit(&iter);
1831
1832 mutex_unlock(&nfc_devlist_mutex);
1833
1834 kfree(w);
1835}
1836
1837static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1838 unsigned long event, void *ptr)
1839{
1840 struct netlink_notify *n = ptr;
1841 struct urelease_work *w;
1842
1843 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1844 goto out;
1845
1846 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1847
1848 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1849 if (w) {
1850 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1851 w->portid = n->portid;
1852 schedule_work((struct work_struct *) w);
1853 }
1854
1855out:
1856 return NOTIFY_DONE;
1857}
1858
1859void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1860{
1861 genl_data->poll_req_portid = 0;
1862 mutex_init(&genl_data->genl_data_mutex);
1863}
1864
1865void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1866{
1867 mutex_destroy(&genl_data->genl_data_mutex);
1868}
1869
1870static struct notifier_block nl_notifier = {
1871 .notifier_call = nfc_genl_rcv_nl_event,
1872};
1873
1874/**
1875 * nfc_genl_init() - Initialize netlink interface
1876 *
1877 * This initialization function registers the nfc netlink family.
1878 */
1879int __init nfc_genl_init(void)
1880{
1881 int rc;
1882
1883 rc = genl_register_family(&nfc_genl_family);
1884 if (rc)
1885 return rc;
1886
1887 netlink_register_notifier(&nl_notifier);
1888
1889 return 0;
1890}
1891
1892/**
1893 * nfc_genl_exit() - Deinitialize netlink interface
1894 *
1895 * This exit function unregisters the nfc netlink family.
1896 */
1897void nfc_genl_exit(void)
1898{
1899 netlink_unregister_notifier(&nl_notifier);
1900 genl_unregister_family(&nfc_genl_family);
1901}
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}