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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2011 Instituto Nokia de Tecnologia
4 *
5 * Authors:
6 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
7 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
8 *
9 * Vendor commands implementation based on net/wireless/nl80211.c
10 * which is:
11 *
12 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
13 * Copyright 2013-2014 Intel Mobile Communications GmbH
14 */
15
16#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
17
18#include <net/genetlink.h>
19#include <linux/nfc.h>
20#include <linux/slab.h>
21
22#include "nfc.h"
23#include "llcp.h"
24
25static const struct genl_multicast_group nfc_genl_mcgrps[] = {
26 { .name = NFC_GENL_MCAST_EVENT_NAME, },
27};
28
29static struct genl_family nfc_genl_family;
30static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
31 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
32 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
33 .len = NFC_DEVICE_NAME_MAXSIZE },
34 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
35 [NFC_ATTR_TARGET_INDEX] = { .type = NLA_U32 },
36 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
37 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
38 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
39 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
40 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
41 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
42 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
43 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
44 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
45 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
46 .len = NFC_FIRMWARE_NAME_MAXSIZE },
47 [NFC_ATTR_SE_INDEX] = { .type = NLA_U32 },
48 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
49 [NFC_ATTR_VENDOR_ID] = { .type = NLA_U32 },
50 [NFC_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
51 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
52
53};
54
55static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
56 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
57 .len = U8_MAX - 4 },
58 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
59};
60
61static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
62 struct netlink_callback *cb, int flags)
63{
64 void *hdr;
65
66 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
67 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
68 if (!hdr)
69 return -EMSGSIZE;
70
71 genl_dump_check_consistent(cb, hdr);
72
73 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
74 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
75 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
76 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
77 goto nla_put_failure;
78 if (target->nfcid1_len > 0 &&
79 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
80 target->nfcid1))
81 goto nla_put_failure;
82 if (target->sensb_res_len > 0 &&
83 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
84 target->sensb_res))
85 goto nla_put_failure;
86 if (target->sensf_res_len > 0 &&
87 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
88 target->sensf_res))
89 goto nla_put_failure;
90
91 if (target->is_iso15693) {
92 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
93 target->iso15693_dsfid) ||
94 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
95 sizeof(target->iso15693_uid), target->iso15693_uid))
96 goto nla_put_failure;
97 }
98
99 if (target->ats_len > 0 &&
100 nla_put(msg, NFC_ATTR_TARGET_ATS, target->ats_len,
101 target->ats))
102 goto nla_put_failure;
103
104 genlmsg_end(msg, hdr);
105 return 0;
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 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
115 struct nfc_dev *dev;
116 u32 idx;
117
118 if (!info->info.attrs[NFC_ATTR_DEVICE_INDEX])
119 return ERR_PTR(-EINVAL);
120
121 idx = nla_get_u32(info->info.attrs[NFC_ATTR_DEVICE_INDEX]);
122
123 dev = nfc_get_device(idx);
124 if (!dev)
125 return ERR_PTR(-ENODEV);
126
127 return dev;
128}
129
130static int nfc_genl_dump_targets(struct sk_buff *skb,
131 struct netlink_callback *cb)
132{
133 int i = cb->args[0];
134 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
135 int rc;
136
137 if (!dev) {
138 dev = __get_device_from_cb(cb);
139 if (IS_ERR(dev))
140 return PTR_ERR(dev);
141
142 cb->args[1] = (long) dev;
143 }
144
145 device_lock(&dev->dev);
146
147 cb->seq = dev->targets_generation;
148
149 while (i < dev->n_targets) {
150 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
151 NLM_F_MULTI);
152 if (rc < 0)
153 break;
154
155 i++;
156 }
157
158 device_unlock(&dev->dev);
159
160 cb->args[0] = i;
161
162 return skb->len;
163}
164
165static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
166{
167 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
168
169 if (dev)
170 nfc_put_device(dev);
171
172 return 0;
173}
174
175int nfc_genl_targets_found(struct nfc_dev *dev)
176{
177 struct sk_buff *msg;
178 void *hdr;
179
180 dev->genl_data.poll_req_portid = 0;
181
182 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
183 if (!msg)
184 return -ENOMEM;
185
186 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
187 NFC_EVENT_TARGETS_FOUND);
188 if (!hdr)
189 goto free_msg;
190
191 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
192 goto nla_put_failure;
193
194 genlmsg_end(msg, hdr);
195
196 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
197
198nla_put_failure:
199free_msg:
200 nlmsg_free(msg);
201 return -EMSGSIZE;
202}
203
204int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
205{
206 struct sk_buff *msg;
207 void *hdr;
208
209 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
210 if (!msg)
211 return -ENOMEM;
212
213 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
214 NFC_EVENT_TARGET_LOST);
215 if (!hdr)
216 goto free_msg;
217
218 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
219 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
220 goto nla_put_failure;
221
222 genlmsg_end(msg, hdr);
223
224 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
225
226 return 0;
227
228nla_put_failure:
229free_msg:
230 nlmsg_free(msg);
231 return -EMSGSIZE;
232}
233
234int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
235{
236 struct sk_buff *msg;
237 void *hdr;
238
239 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
240 if (!msg)
241 return -ENOMEM;
242
243 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
244 NFC_EVENT_TM_ACTIVATED);
245 if (!hdr)
246 goto free_msg;
247
248 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
249 goto nla_put_failure;
250 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
251 goto nla_put_failure;
252
253 genlmsg_end(msg, hdr);
254
255 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
256
257 return 0;
258
259nla_put_failure:
260free_msg:
261 nlmsg_free(msg);
262 return -EMSGSIZE;
263}
264
265int nfc_genl_tm_deactivated(struct nfc_dev *dev)
266{
267 struct sk_buff *msg;
268 void *hdr;
269
270 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
271 if (!msg)
272 return -ENOMEM;
273
274 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
275 NFC_EVENT_TM_DEACTIVATED);
276 if (!hdr)
277 goto free_msg;
278
279 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
280 goto nla_put_failure;
281
282 genlmsg_end(msg, hdr);
283
284 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
285
286 return 0;
287
288nla_put_failure:
289free_msg:
290 nlmsg_free(msg);
291 return -EMSGSIZE;
292}
293
294static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
295{
296 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
297 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
298 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
299 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
300 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
301 return -1;
302 return 0;
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 (nfc_genl_setup_device_added(dev, msg))
320 goto nla_put_failure;
321
322 genlmsg_end(msg, hdr);
323
324 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
325
326 return 0;
327
328nla_put_failure:
329free_msg:
330 nlmsg_free(msg);
331 return -EMSGSIZE;
332}
333
334int nfc_genl_device_removed(struct nfc_dev *dev)
335{
336 struct sk_buff *msg;
337 void *hdr;
338
339 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
340 if (!msg)
341 return -ENOMEM;
342
343 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
344 NFC_EVENT_DEVICE_REMOVED);
345 if (!hdr)
346 goto free_msg;
347
348 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
349 goto nla_put_failure;
350
351 genlmsg_end(msg, hdr);
352
353 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
354
355 return 0;
356
357nla_put_failure:
358free_msg:
359 nlmsg_free(msg);
360 return -EMSGSIZE;
361}
362
363int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
364{
365 struct sk_buff *msg;
366 struct nlattr *sdp_attr, *uri_attr;
367 struct nfc_llcp_sdp_tlv *sdres;
368 struct hlist_node *n;
369 void *hdr;
370 int rc = -EMSGSIZE;
371 int i;
372
373 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
374 if (!msg)
375 return -ENOMEM;
376
377 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
378 NFC_EVENT_LLC_SDRES);
379 if (!hdr)
380 goto free_msg;
381
382 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
383 goto nla_put_failure;
384
385 sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP);
386 if (sdp_attr == NULL) {
387 rc = -ENOMEM;
388 goto nla_put_failure;
389 }
390
391 i = 1;
392 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
393 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
394
395 uri_attr = nla_nest_start_noflag(msg, i++);
396 if (uri_attr == NULL) {
397 rc = -ENOMEM;
398 goto nla_put_failure;
399 }
400
401 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
402 goto nla_put_failure;
403
404 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
405 goto nla_put_failure;
406
407 nla_nest_end(msg, uri_attr);
408
409 hlist_del(&sdres->node);
410
411 nfc_llcp_free_sdp_tlv(sdres);
412 }
413
414 nla_nest_end(msg, sdp_attr);
415
416 genlmsg_end(msg, hdr);
417
418 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
419
420nla_put_failure:
421free_msg:
422 nlmsg_free(msg);
423
424 nfc_llcp_free_sdp_tlv_list(sdres_list);
425
426 return rc;
427}
428
429int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
430{
431 struct sk_buff *msg;
432 void *hdr;
433
434 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
435 if (!msg)
436 return -ENOMEM;
437
438 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
439 NFC_EVENT_SE_ADDED);
440 if (!hdr)
441 goto free_msg;
442
443 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
444 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
445 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
446 goto nla_put_failure;
447
448 genlmsg_end(msg, hdr);
449
450 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
451
452 return 0;
453
454nla_put_failure:
455free_msg:
456 nlmsg_free(msg);
457 return -EMSGSIZE;
458}
459
460int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
461{
462 struct sk_buff *msg;
463 void *hdr;
464
465 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
466 if (!msg)
467 return -ENOMEM;
468
469 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
470 NFC_EVENT_SE_REMOVED);
471 if (!hdr)
472 goto free_msg;
473
474 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
475 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
476 goto nla_put_failure;
477
478 genlmsg_end(msg, hdr);
479
480 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
481
482 return 0;
483
484nla_put_failure:
485free_msg:
486 nlmsg_free(msg);
487 return -EMSGSIZE;
488}
489
490int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
491 struct nfc_evt_transaction *evt_transaction)
492{
493 struct nfc_se *se;
494 struct sk_buff *msg;
495 void *hdr;
496
497 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
498 if (!msg)
499 return -ENOMEM;
500
501 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
502 NFC_EVENT_SE_TRANSACTION);
503 if (!hdr)
504 goto free_msg;
505
506 se = nfc_find_se(dev, se_idx);
507 if (!se)
508 goto free_msg;
509
510 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
511 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
512 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
513 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
514 evt_transaction->aid) ||
515 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
516 evt_transaction->params))
517 goto nla_put_failure;
518
519 /* evt_transaction is no more used */
520 devm_kfree(&dev->dev, evt_transaction);
521
522 genlmsg_end(msg, hdr);
523
524 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
525
526 return 0;
527
528nla_put_failure:
529free_msg:
530 /* evt_transaction is no more used */
531 devm_kfree(&dev->dev, evt_transaction);
532 nlmsg_free(msg);
533 return -EMSGSIZE;
534}
535
536int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
537{
538 const struct nfc_se *se;
539 struct sk_buff *msg;
540 void *hdr;
541
542 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
543 if (!msg)
544 return -ENOMEM;
545
546 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
547 NFC_EVENT_SE_CONNECTIVITY);
548 if (!hdr)
549 goto free_msg;
550
551 se = nfc_find_se(dev, se_idx);
552 if (!se)
553 goto free_msg;
554
555 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
556 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
557 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
558 goto nla_put_failure;
559
560 genlmsg_end(msg, hdr);
561
562 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
563
564 return 0;
565
566nla_put_failure:
567free_msg:
568 nlmsg_free(msg);
569 return -EMSGSIZE;
570}
571
572static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
573 u32 portid, u32 seq,
574 struct netlink_callback *cb,
575 int flags)
576{
577 void *hdr;
578
579 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
580 NFC_CMD_GET_DEVICE);
581 if (!hdr)
582 return -EMSGSIZE;
583
584 if (cb)
585 genl_dump_check_consistent(cb, hdr);
586
587 if (nfc_genl_setup_device_added(dev, msg))
588 goto nla_put_failure;
589
590 genlmsg_end(msg, hdr);
591 return 0;
592
593nla_put_failure:
594 genlmsg_cancel(msg, hdr);
595 return -EMSGSIZE;
596}
597
598static int nfc_genl_dump_devices(struct sk_buff *skb,
599 struct netlink_callback *cb)
600{
601 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
602 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
603 bool first_call = false;
604
605 if (!iter) {
606 first_call = true;
607 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
608 if (!iter)
609 return -ENOMEM;
610 cb->args[0] = (long) iter;
611 }
612
613 mutex_lock(&nfc_devlist_mutex);
614
615 cb->seq = nfc_devlist_generation;
616
617 if (first_call) {
618 nfc_device_iter_init(iter);
619 dev = nfc_device_iter_next(iter);
620 }
621
622 while (dev) {
623 int rc;
624
625 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
626 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
627 if (rc < 0)
628 break;
629
630 dev = nfc_device_iter_next(iter);
631 }
632
633 mutex_unlock(&nfc_devlist_mutex);
634
635 cb->args[1] = (long) dev;
636
637 return skb->len;
638}
639
640static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
641{
642 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
643
644 if (iter) {
645 nfc_device_iter_exit(iter);
646 kfree(iter);
647 }
648
649 return 0;
650}
651
652int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
653 u8 comm_mode, u8 rf_mode)
654{
655 struct sk_buff *msg;
656 void *hdr;
657
658 pr_debug("DEP link is up\n");
659
660 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
661 if (!msg)
662 return -ENOMEM;
663
664 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
665 if (!hdr)
666 goto free_msg;
667
668 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
669 goto nla_put_failure;
670 if (rf_mode == NFC_RF_INITIATOR &&
671 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
672 goto nla_put_failure;
673 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
674 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
675 goto nla_put_failure;
676
677 genlmsg_end(msg, hdr);
678
679 dev->dep_link_up = true;
680
681 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
682
683 return 0;
684
685nla_put_failure:
686free_msg:
687 nlmsg_free(msg);
688 return -EMSGSIZE;
689}
690
691int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
692{
693 struct sk_buff *msg;
694 void *hdr;
695
696 pr_debug("DEP link is down\n");
697
698 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
699 if (!msg)
700 return -ENOMEM;
701
702 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
703 NFC_CMD_DEP_LINK_DOWN);
704 if (!hdr)
705 goto free_msg;
706
707 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
708 goto nla_put_failure;
709
710 genlmsg_end(msg, hdr);
711
712 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
713
714 return 0;
715
716nla_put_failure:
717free_msg:
718 nlmsg_free(msg);
719 return -EMSGSIZE;
720}
721
722static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
723{
724 struct sk_buff *msg;
725 struct nfc_dev *dev;
726 u32 idx;
727 int rc = -ENOBUFS;
728
729 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
730 return -EINVAL;
731
732 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
733
734 dev = nfc_get_device(idx);
735 if (!dev)
736 return -ENODEV;
737
738 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
739 if (!msg) {
740 rc = -ENOMEM;
741 goto out_putdev;
742 }
743
744 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
745 NULL, 0);
746 if (rc < 0)
747 goto out_free;
748
749 nfc_put_device(dev);
750
751 return genlmsg_reply(msg, info);
752
753out_free:
754 nlmsg_free(msg);
755out_putdev:
756 nfc_put_device(dev);
757 return rc;
758}
759
760static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
761{
762 struct nfc_dev *dev;
763 int rc;
764 u32 idx;
765
766 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
767 return -EINVAL;
768
769 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
770
771 dev = nfc_get_device(idx);
772 if (!dev)
773 return -ENODEV;
774
775 rc = nfc_dev_up(dev);
776
777 nfc_put_device(dev);
778 return rc;
779}
780
781static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
782{
783 struct nfc_dev *dev;
784 int rc;
785 u32 idx;
786
787 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
788 return -EINVAL;
789
790 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
791
792 dev = nfc_get_device(idx);
793 if (!dev)
794 return -ENODEV;
795
796 rc = nfc_dev_down(dev);
797
798 nfc_put_device(dev);
799 return rc;
800}
801
802static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
803{
804 struct nfc_dev *dev;
805 int rc;
806 u32 idx;
807 u32 im_protocols = 0, tm_protocols = 0;
808
809 pr_debug("Poll start\n");
810
811 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
812 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
813 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
814 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
815 return -EINVAL;
816
817 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
818
819 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
820 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
821
822 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
823 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
824 else if (info->attrs[NFC_ATTR_PROTOCOLS])
825 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
826
827 dev = nfc_get_device(idx);
828 if (!dev)
829 return -ENODEV;
830
831 mutex_lock(&dev->genl_data.genl_data_mutex);
832
833 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
834 if (!rc)
835 dev->genl_data.poll_req_portid = info->snd_portid;
836
837 mutex_unlock(&dev->genl_data.genl_data_mutex);
838
839 nfc_put_device(dev);
840 return rc;
841}
842
843static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
844{
845 struct nfc_dev *dev;
846 int rc;
847 u32 idx;
848
849 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
850 return -EINVAL;
851
852 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
853
854 dev = nfc_get_device(idx);
855 if (!dev)
856 return -ENODEV;
857
858 device_lock(&dev->dev);
859
860 if (!dev->polling) {
861 device_unlock(&dev->dev);
862 nfc_put_device(dev);
863 return -EINVAL;
864 }
865
866 device_unlock(&dev->dev);
867
868 mutex_lock(&dev->genl_data.genl_data_mutex);
869
870 if (dev->genl_data.poll_req_portid != info->snd_portid) {
871 rc = -EBUSY;
872 goto out;
873 }
874
875 rc = nfc_stop_poll(dev);
876 dev->genl_data.poll_req_portid = 0;
877
878out:
879 mutex_unlock(&dev->genl_data.genl_data_mutex);
880 nfc_put_device(dev);
881 return rc;
882}
883
884static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
885{
886 struct nfc_dev *dev;
887 u32 device_idx, target_idx, protocol;
888 int rc;
889
890 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
891 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
892 !info->attrs[NFC_ATTR_PROTOCOLS])
893 return -EINVAL;
894
895 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
896
897 dev = nfc_get_device(device_idx);
898 if (!dev)
899 return -ENODEV;
900
901 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
902 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
903
904 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
905 rc = nfc_activate_target(dev, target_idx, protocol);
906
907 nfc_put_device(dev);
908 return rc;
909}
910
911static int nfc_genl_deactivate_target(struct sk_buff *skb,
912 struct genl_info *info)
913{
914 struct nfc_dev *dev;
915 u32 device_idx, target_idx;
916 int rc;
917
918 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
919 !info->attrs[NFC_ATTR_TARGET_INDEX])
920 return -EINVAL;
921
922 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
923
924 dev = nfc_get_device(device_idx);
925 if (!dev)
926 return -ENODEV;
927
928 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
929
930 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
931
932 nfc_put_device(dev);
933 return rc;
934}
935
936static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
937{
938 struct nfc_dev *dev;
939 int rc, tgt_idx;
940 u32 idx;
941 u8 comm;
942
943 pr_debug("DEP link up\n");
944
945 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
946 !info->attrs[NFC_ATTR_COMM_MODE])
947 return -EINVAL;
948
949 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
950 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
951 tgt_idx = NFC_TARGET_IDX_ANY;
952 else
953 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
954
955 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
956
957 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
958 return -EINVAL;
959
960 dev = nfc_get_device(idx);
961 if (!dev)
962 return -ENODEV;
963
964 rc = nfc_dep_link_up(dev, tgt_idx, comm);
965
966 nfc_put_device(dev);
967
968 return rc;
969}
970
971static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
972{
973 struct nfc_dev *dev;
974 int rc;
975 u32 idx;
976
977 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
978 return -EINVAL;
979
980 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
981
982 dev = nfc_get_device(idx);
983 if (!dev)
984 return -ENODEV;
985
986 rc = nfc_dep_link_down(dev);
987
988 nfc_put_device(dev);
989 return rc;
990}
991
992static int nfc_genl_send_params(struct sk_buff *msg,
993 struct nfc_llcp_local *local,
994 u32 portid, u32 seq)
995{
996 void *hdr;
997
998 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
999 NFC_CMD_LLC_GET_PARAMS);
1000 if (!hdr)
1001 return -EMSGSIZE;
1002
1003 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1004 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1005 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1006 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1007 goto nla_put_failure;
1008
1009 genlmsg_end(msg, hdr);
1010 return 0;
1011
1012nla_put_failure:
1013 genlmsg_cancel(msg, hdr);
1014 return -EMSGSIZE;
1015}
1016
1017static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1018{
1019 struct nfc_dev *dev;
1020 struct nfc_llcp_local *local;
1021 int rc = 0;
1022 struct sk_buff *msg = NULL;
1023 u32 idx;
1024
1025 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1026 return -EINVAL;
1027
1028 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1029
1030 dev = nfc_get_device(idx);
1031 if (!dev)
1032 return -ENODEV;
1033
1034 device_lock(&dev->dev);
1035
1036 local = nfc_llcp_find_local(dev);
1037 if (!local) {
1038 rc = -ENODEV;
1039 goto exit;
1040 }
1041
1042 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1043 if (!msg) {
1044 rc = -ENOMEM;
1045 goto put_local;
1046 }
1047
1048 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1049
1050put_local:
1051 nfc_llcp_local_put(local);
1052
1053exit:
1054 device_unlock(&dev->dev);
1055
1056 nfc_put_device(dev);
1057
1058 if (rc < 0) {
1059 if (msg)
1060 nlmsg_free(msg);
1061
1062 return rc;
1063 }
1064
1065 return genlmsg_reply(msg, info);
1066}
1067
1068static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1069{
1070 struct nfc_dev *dev;
1071 struct nfc_llcp_local *local;
1072 u8 rw = 0;
1073 u16 miux = 0;
1074 u32 idx;
1075 int rc = 0;
1076
1077 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1078 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1079 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1080 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1081 return -EINVAL;
1082
1083 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1084 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1085
1086 if (rw > LLCP_MAX_RW)
1087 return -EINVAL;
1088 }
1089
1090 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1091 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1092
1093 if (miux > LLCP_MAX_MIUX)
1094 return -EINVAL;
1095 }
1096
1097 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1098
1099 dev = nfc_get_device(idx);
1100 if (!dev)
1101 return -ENODEV;
1102
1103 device_lock(&dev->dev);
1104
1105 local = nfc_llcp_find_local(dev);
1106 if (!local) {
1107 rc = -ENODEV;
1108 goto exit;
1109 }
1110
1111 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1112 if (dev->dep_link_up) {
1113 rc = -EINPROGRESS;
1114 goto put_local;
1115 }
1116
1117 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1118 }
1119
1120 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1121 local->rw = rw;
1122
1123 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1124 local->miux = cpu_to_be16(miux);
1125
1126put_local:
1127 nfc_llcp_local_put(local);
1128
1129exit:
1130 device_unlock(&dev->dev);
1131
1132 nfc_put_device(dev);
1133
1134 return rc;
1135}
1136
1137static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1138{
1139 struct nfc_dev *dev;
1140 struct nfc_llcp_local *local;
1141 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1142 u32 idx;
1143 u8 tid;
1144 char *uri;
1145 int rc = 0, rem;
1146 size_t uri_len, tlvs_len;
1147 struct hlist_head sdreq_list;
1148 struct nfc_llcp_sdp_tlv *sdreq;
1149
1150 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1151 !info->attrs[NFC_ATTR_LLC_SDP])
1152 return -EINVAL;
1153
1154 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1155
1156 dev = nfc_get_device(idx);
1157 if (!dev)
1158 return -ENODEV;
1159
1160 device_lock(&dev->dev);
1161
1162 if (dev->dep_link_up == false) {
1163 rc = -ENOLINK;
1164 goto exit;
1165 }
1166
1167 local = nfc_llcp_find_local(dev);
1168 if (!local) {
1169 rc = -ENODEV;
1170 goto exit;
1171 }
1172
1173 INIT_HLIST_HEAD(&sdreq_list);
1174
1175 tlvs_len = 0;
1176
1177 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1178 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1179 attr, nfc_sdp_genl_policy,
1180 info->extack);
1181
1182 if (rc != 0) {
1183 rc = -EINVAL;
1184 goto put_local;
1185 }
1186
1187 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1188 continue;
1189
1190 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1191 if (uri_len == 0)
1192 continue;
1193
1194 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1195 if (uri == NULL || *uri == 0)
1196 continue;
1197
1198 tid = local->sdreq_next_tid++;
1199
1200 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1201 if (sdreq == NULL) {
1202 rc = -ENOMEM;
1203 goto put_local;
1204 }
1205
1206 tlvs_len += sdreq->tlv_len;
1207
1208 hlist_add_head(&sdreq->node, &sdreq_list);
1209 }
1210
1211 if (hlist_empty(&sdreq_list)) {
1212 rc = -EINVAL;
1213 goto put_local;
1214 }
1215
1216 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1217
1218put_local:
1219 nfc_llcp_local_put(local);
1220
1221exit:
1222 device_unlock(&dev->dev);
1223
1224 nfc_put_device(dev);
1225
1226 return rc;
1227}
1228
1229static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1230{
1231 struct nfc_dev *dev;
1232 int rc;
1233 u32 idx;
1234 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1235
1236 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1237 return -EINVAL;
1238
1239 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1240
1241 dev = nfc_get_device(idx);
1242 if (!dev)
1243 return -ENODEV;
1244
1245 nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1246 sizeof(firmware_name));
1247
1248 rc = nfc_fw_download(dev, firmware_name);
1249
1250 nfc_put_device(dev);
1251 return rc;
1252}
1253
1254int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1255 u32 result)
1256{
1257 struct sk_buff *msg;
1258 void *hdr;
1259
1260 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1261 if (!msg)
1262 return -ENOMEM;
1263
1264 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1265 NFC_CMD_FW_DOWNLOAD);
1266 if (!hdr)
1267 goto free_msg;
1268
1269 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1270 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1271 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1272 goto nla_put_failure;
1273
1274 genlmsg_end(msg, hdr);
1275
1276 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
1277
1278 return 0;
1279
1280nla_put_failure:
1281free_msg:
1282 nlmsg_free(msg);
1283 return -EMSGSIZE;
1284}
1285
1286static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1287{
1288 struct nfc_dev *dev;
1289 int rc;
1290 u32 idx, se_idx;
1291
1292 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1293 !info->attrs[NFC_ATTR_SE_INDEX])
1294 return -EINVAL;
1295
1296 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1297 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1298
1299 dev = nfc_get_device(idx);
1300 if (!dev)
1301 return -ENODEV;
1302
1303 rc = nfc_enable_se(dev, se_idx);
1304
1305 nfc_put_device(dev);
1306 return rc;
1307}
1308
1309static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1310{
1311 struct nfc_dev *dev;
1312 int rc;
1313 u32 idx, se_idx;
1314
1315 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1316 !info->attrs[NFC_ATTR_SE_INDEX])
1317 return -EINVAL;
1318
1319 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1320 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1321
1322 dev = nfc_get_device(idx);
1323 if (!dev)
1324 return -ENODEV;
1325
1326 rc = nfc_disable_se(dev, se_idx);
1327
1328 nfc_put_device(dev);
1329 return rc;
1330}
1331
1332static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1333 u32 portid, u32 seq,
1334 struct netlink_callback *cb,
1335 int flags)
1336{
1337 void *hdr;
1338 struct nfc_se *se, *n;
1339
1340 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1341 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1342 NFC_CMD_GET_SE);
1343 if (!hdr)
1344 goto nla_put_failure;
1345
1346 if (cb)
1347 genl_dump_check_consistent(cb, hdr);
1348
1349 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1350 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1351 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1352 goto nla_put_failure;
1353
1354 genlmsg_end(msg, hdr);
1355 }
1356
1357 return 0;
1358
1359nla_put_failure:
1360 genlmsg_cancel(msg, hdr);
1361 return -EMSGSIZE;
1362}
1363
1364static int nfc_genl_dump_ses(struct sk_buff *skb,
1365 struct netlink_callback *cb)
1366{
1367 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1368 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1369 bool first_call = false;
1370
1371 if (!iter) {
1372 first_call = true;
1373 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1374 if (!iter)
1375 return -ENOMEM;
1376 cb->args[0] = (long) iter;
1377 }
1378
1379 mutex_lock(&nfc_devlist_mutex);
1380
1381 cb->seq = nfc_devlist_generation;
1382
1383 if (first_call) {
1384 nfc_device_iter_init(iter);
1385 dev = nfc_device_iter_next(iter);
1386 }
1387
1388 while (dev) {
1389 int rc;
1390
1391 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1392 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1393 if (rc < 0)
1394 break;
1395
1396 dev = nfc_device_iter_next(iter);
1397 }
1398
1399 mutex_unlock(&nfc_devlist_mutex);
1400
1401 cb->args[1] = (long) dev;
1402
1403 return skb->len;
1404}
1405
1406static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1407{
1408 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1409
1410 if (iter) {
1411 nfc_device_iter_exit(iter);
1412 kfree(iter);
1413 }
1414
1415 return 0;
1416}
1417
1418static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1419 u8 *apdu, size_t apdu_length,
1420 se_io_cb_t cb, void *cb_context)
1421{
1422 struct nfc_se *se;
1423 int rc;
1424
1425 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1426
1427 device_lock(&dev->dev);
1428
1429 if (!device_is_registered(&dev->dev)) {
1430 rc = -ENODEV;
1431 goto error;
1432 }
1433
1434 if (!dev->dev_up) {
1435 rc = -ENODEV;
1436 goto error;
1437 }
1438
1439 if (!dev->ops->se_io) {
1440 rc = -EOPNOTSUPP;
1441 goto error;
1442 }
1443
1444 se = nfc_find_se(dev, se_idx);
1445 if (!se) {
1446 rc = -EINVAL;
1447 goto error;
1448 }
1449
1450 if (se->state != NFC_SE_ENABLED) {
1451 rc = -ENODEV;
1452 goto error;
1453 }
1454
1455 rc = dev->ops->se_io(dev, se_idx, apdu,
1456 apdu_length, cb, cb_context);
1457
1458 device_unlock(&dev->dev);
1459 return rc;
1460
1461error:
1462 device_unlock(&dev->dev);
1463 kfree(cb_context);
1464 return rc;
1465}
1466
1467struct se_io_ctx {
1468 u32 dev_idx;
1469 u32 se_idx;
1470};
1471
1472static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1473{
1474 struct se_io_ctx *ctx = context;
1475 struct sk_buff *msg;
1476 void *hdr;
1477
1478 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1479 if (!msg) {
1480 kfree(ctx);
1481 return;
1482 }
1483
1484 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1485 NFC_CMD_SE_IO);
1486 if (!hdr)
1487 goto free_msg;
1488
1489 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1490 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1491 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1492 goto nla_put_failure;
1493
1494 genlmsg_end(msg, hdr);
1495
1496 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1497
1498 kfree(ctx);
1499
1500 return;
1501
1502nla_put_failure:
1503free_msg:
1504 nlmsg_free(msg);
1505 kfree(ctx);
1506
1507 return;
1508}
1509
1510static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1511{
1512 struct nfc_dev *dev;
1513 struct se_io_ctx *ctx;
1514 u32 dev_idx, se_idx;
1515 u8 *apdu;
1516 size_t apdu_len;
1517 int rc;
1518
1519 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1520 !info->attrs[NFC_ATTR_SE_INDEX] ||
1521 !info->attrs[NFC_ATTR_SE_APDU])
1522 return -EINVAL;
1523
1524 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1525 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1526
1527 dev = nfc_get_device(dev_idx);
1528 if (!dev)
1529 return -ENODEV;
1530
1531 if (!dev->ops || !dev->ops->se_io) {
1532 rc = -EOPNOTSUPP;
1533 goto put_dev;
1534 }
1535
1536 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1537 if (apdu_len == 0) {
1538 rc = -EINVAL;
1539 goto put_dev;
1540 }
1541
1542 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1543 if (!apdu) {
1544 rc = -EINVAL;
1545 goto put_dev;
1546 }
1547
1548 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1549 if (!ctx) {
1550 rc = -ENOMEM;
1551 goto put_dev;
1552 }
1553
1554 ctx->dev_idx = dev_idx;
1555 ctx->se_idx = se_idx;
1556
1557 rc = nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1558
1559put_dev:
1560 nfc_put_device(dev);
1561 return rc;
1562}
1563
1564static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1565 struct genl_info *info)
1566{
1567 struct nfc_dev *dev;
1568 const struct nfc_vendor_cmd *cmd;
1569 u32 dev_idx, vid, subcmd;
1570 u8 *data;
1571 size_t data_len;
1572 int i, err;
1573
1574 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1575 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1576 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1577 return -EINVAL;
1578
1579 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1580 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1581 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1582
1583 dev = nfc_get_device(dev_idx);
1584 if (!dev)
1585 return -ENODEV;
1586
1587 if (!dev->vendor_cmds || !dev->n_vendor_cmds) {
1588 err = -ENODEV;
1589 goto put_dev;
1590 }
1591
1592 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1593 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1594 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1595 if (data_len == 0) {
1596 err = -EINVAL;
1597 goto put_dev;
1598 }
1599 } else {
1600 data = NULL;
1601 data_len = 0;
1602 }
1603
1604 for (i = 0; i < dev->n_vendor_cmds; i++) {
1605 cmd = &dev->vendor_cmds[i];
1606
1607 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1608 continue;
1609
1610 dev->cur_cmd_info = info;
1611 err = cmd->doit(dev, data, data_len);
1612 dev->cur_cmd_info = NULL;
1613 goto put_dev;
1614 }
1615
1616 err = -EOPNOTSUPP;
1617
1618put_dev:
1619 nfc_put_device(dev);
1620 return err;
1621}
1622
1623/* message building helper */
1624static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1625 int flags, u8 cmd)
1626{
1627 /* since there is no private header just add the generic one */
1628 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1629}
1630
1631static struct sk_buff *
1632__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1633 u32 portid, u32 seq,
1634 enum nfc_attrs attr,
1635 u32 oui, u32 subcmd, gfp_t gfp)
1636{
1637 struct sk_buff *skb;
1638 void *hdr;
1639
1640 skb = nlmsg_new(approxlen + 100, gfp);
1641 if (!skb)
1642 return NULL;
1643
1644 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1645 if (!hdr) {
1646 kfree_skb(skb);
1647 return NULL;
1648 }
1649
1650 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1651 goto nla_put_failure;
1652 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1653 goto nla_put_failure;
1654 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1655 goto nla_put_failure;
1656
1657 ((void **)skb->cb)[0] = dev;
1658 ((void **)skb->cb)[1] = hdr;
1659
1660 return skb;
1661
1662nla_put_failure:
1663 kfree_skb(skb);
1664 return NULL;
1665}
1666
1667struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1668 enum nfc_attrs attr,
1669 u32 oui, u32 subcmd,
1670 int approxlen)
1671{
1672 if (WARN_ON(!dev->cur_cmd_info))
1673 return NULL;
1674
1675 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1676 dev->cur_cmd_info->snd_portid,
1677 dev->cur_cmd_info->snd_seq, attr,
1678 oui, subcmd, GFP_KERNEL);
1679}
1680EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1681
1682int nfc_vendor_cmd_reply(struct sk_buff *skb)
1683{
1684 struct nfc_dev *dev = ((void **)skb->cb)[0];
1685 void *hdr = ((void **)skb->cb)[1];
1686
1687 /* clear CB data for netlink core to own from now on */
1688 memset(skb->cb, 0, sizeof(skb->cb));
1689
1690 if (WARN_ON(!dev->cur_cmd_info)) {
1691 kfree_skb(skb);
1692 return -EINVAL;
1693 }
1694
1695 genlmsg_end(skb, hdr);
1696 return genlmsg_reply(skb, dev->cur_cmd_info);
1697}
1698EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1699
1700static const struct genl_ops nfc_genl_ops[] = {
1701 {
1702 .cmd = NFC_CMD_GET_DEVICE,
1703 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1704 .doit = nfc_genl_get_device,
1705 .dumpit = nfc_genl_dump_devices,
1706 .done = nfc_genl_dump_devices_done,
1707 },
1708 {
1709 .cmd = NFC_CMD_DEV_UP,
1710 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1711 .doit = nfc_genl_dev_up,
1712 .flags = GENL_ADMIN_PERM,
1713 },
1714 {
1715 .cmd = NFC_CMD_DEV_DOWN,
1716 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1717 .doit = nfc_genl_dev_down,
1718 .flags = GENL_ADMIN_PERM,
1719 },
1720 {
1721 .cmd = NFC_CMD_START_POLL,
1722 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1723 .doit = nfc_genl_start_poll,
1724 .flags = GENL_ADMIN_PERM,
1725 },
1726 {
1727 .cmd = NFC_CMD_STOP_POLL,
1728 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1729 .doit = nfc_genl_stop_poll,
1730 .flags = GENL_ADMIN_PERM,
1731 },
1732 {
1733 .cmd = NFC_CMD_DEP_LINK_UP,
1734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1735 .doit = nfc_genl_dep_link_up,
1736 .flags = GENL_ADMIN_PERM,
1737 },
1738 {
1739 .cmd = NFC_CMD_DEP_LINK_DOWN,
1740 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1741 .doit = nfc_genl_dep_link_down,
1742 .flags = GENL_ADMIN_PERM,
1743 },
1744 {
1745 .cmd = NFC_CMD_GET_TARGET,
1746 .validate = GENL_DONT_VALIDATE_STRICT |
1747 GENL_DONT_VALIDATE_DUMP_STRICT,
1748 .dumpit = nfc_genl_dump_targets,
1749 .done = nfc_genl_dump_targets_done,
1750 },
1751 {
1752 .cmd = NFC_CMD_LLC_GET_PARAMS,
1753 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1754 .doit = nfc_genl_llc_get_params,
1755 },
1756 {
1757 .cmd = NFC_CMD_LLC_SET_PARAMS,
1758 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1759 .doit = nfc_genl_llc_set_params,
1760 .flags = GENL_ADMIN_PERM,
1761 },
1762 {
1763 .cmd = NFC_CMD_LLC_SDREQ,
1764 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1765 .doit = nfc_genl_llc_sdreq,
1766 .flags = GENL_ADMIN_PERM,
1767 },
1768 {
1769 .cmd = NFC_CMD_FW_DOWNLOAD,
1770 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1771 .doit = nfc_genl_fw_download,
1772 .flags = GENL_ADMIN_PERM,
1773 },
1774 {
1775 .cmd = NFC_CMD_ENABLE_SE,
1776 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1777 .doit = nfc_genl_enable_se,
1778 .flags = GENL_ADMIN_PERM,
1779 },
1780 {
1781 .cmd = NFC_CMD_DISABLE_SE,
1782 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1783 .doit = nfc_genl_disable_se,
1784 .flags = GENL_ADMIN_PERM,
1785 },
1786 {
1787 .cmd = NFC_CMD_GET_SE,
1788 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1789 .dumpit = nfc_genl_dump_ses,
1790 .done = nfc_genl_dump_ses_done,
1791 },
1792 {
1793 .cmd = NFC_CMD_SE_IO,
1794 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1795 .doit = nfc_genl_se_io,
1796 .flags = GENL_ADMIN_PERM,
1797 },
1798 {
1799 .cmd = NFC_CMD_ACTIVATE_TARGET,
1800 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1801 .doit = nfc_genl_activate_target,
1802 .flags = GENL_ADMIN_PERM,
1803 },
1804 {
1805 .cmd = NFC_CMD_VENDOR,
1806 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1807 .doit = nfc_genl_vendor_cmd,
1808 .flags = GENL_ADMIN_PERM,
1809 },
1810 {
1811 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1812 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1813 .doit = nfc_genl_deactivate_target,
1814 .flags = GENL_ADMIN_PERM,
1815 },
1816};
1817
1818static struct genl_family nfc_genl_family __ro_after_init = {
1819 .hdrsize = 0,
1820 .name = NFC_GENL_NAME,
1821 .version = NFC_GENL_VERSION,
1822 .maxattr = NFC_ATTR_MAX,
1823 .policy = nfc_genl_policy,
1824 .module = THIS_MODULE,
1825 .ops = nfc_genl_ops,
1826 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1827 .resv_start_op = NFC_CMD_DEACTIVATE_TARGET + 1,
1828 .mcgrps = nfc_genl_mcgrps,
1829 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1830};
1831
1832
1833struct urelease_work {
1834 struct work_struct w;
1835 u32 portid;
1836};
1837
1838static void nfc_urelease_event_work(struct work_struct *work)
1839{
1840 struct urelease_work *w = container_of(work, struct urelease_work, w);
1841 struct class_dev_iter iter;
1842 struct nfc_dev *dev;
1843
1844 pr_debug("portid %d\n", w->portid);
1845
1846 mutex_lock(&nfc_devlist_mutex);
1847
1848 nfc_device_iter_init(&iter);
1849 dev = nfc_device_iter_next(&iter);
1850
1851 while (dev) {
1852 mutex_lock(&dev->genl_data.genl_data_mutex);
1853
1854 if (dev->genl_data.poll_req_portid == w->portid) {
1855 nfc_stop_poll(dev);
1856 dev->genl_data.poll_req_portid = 0;
1857 }
1858
1859 mutex_unlock(&dev->genl_data.genl_data_mutex);
1860
1861 dev = nfc_device_iter_next(&iter);
1862 }
1863
1864 nfc_device_iter_exit(&iter);
1865
1866 mutex_unlock(&nfc_devlist_mutex);
1867
1868 kfree(w);
1869}
1870
1871static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1872 unsigned long event, void *ptr)
1873{
1874 struct netlink_notify *n = ptr;
1875 struct urelease_work *w;
1876
1877 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1878 goto out;
1879
1880 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1881
1882 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1883 if (w) {
1884 INIT_WORK(&w->w, nfc_urelease_event_work);
1885 w->portid = n->portid;
1886 schedule_work(&w->w);
1887 }
1888
1889out:
1890 return NOTIFY_DONE;
1891}
1892
1893void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1894{
1895 genl_data->poll_req_portid = 0;
1896 mutex_init(&genl_data->genl_data_mutex);
1897}
1898
1899void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1900{
1901 mutex_destroy(&genl_data->genl_data_mutex);
1902}
1903
1904static struct notifier_block nl_notifier = {
1905 .notifier_call = nfc_genl_rcv_nl_event,
1906};
1907
1908/**
1909 * nfc_genl_init() - Initialize netlink interface
1910 *
1911 * This initialization function registers the nfc netlink family.
1912 */
1913int __init nfc_genl_init(void)
1914{
1915 int rc;
1916
1917 rc = genl_register_family(&nfc_genl_family);
1918 if (rc)
1919 return rc;
1920
1921 netlink_register_notifier(&nl_notifier);
1922
1923 return 0;
1924}
1925
1926/**
1927 * nfc_genl_exit() - Deinitialize netlink interface
1928 *
1929 * This exit function unregisters the nfc netlink family.
1930 */
1931void nfc_genl_exit(void)
1932{
1933 netlink_unregister_notifier(&nl_notifier);
1934 genl_unregister_family(&nfc_genl_family);
1935}
1/*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * Vendor commands implementation based on net/wireless/nl80211.c
9 * which is:
10 *
11 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
12 * Copyright 2013-2014 Intel Mobile Communications GmbH
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 */
27
28#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
29
30#include <net/genetlink.h>
31#include <linux/nfc.h>
32#include <linux/slab.h>
33
34#include "nfc.h"
35#include "llcp.h"
36
37static const struct genl_multicast_group nfc_genl_mcgrps[] = {
38 { .name = NFC_GENL_MCAST_EVENT_NAME, },
39};
40
41static struct genl_family nfc_genl_family = {
42 .id = GENL_ID_GENERATE,
43 .hdrsize = 0,
44 .name = NFC_GENL_NAME,
45 .version = NFC_GENL_VERSION,
46 .maxattr = NFC_ATTR_MAX,
47};
48
49static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
50 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
51 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
52 .len = NFC_DEVICE_NAME_MAXSIZE },
53 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
54 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
55 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
56 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
57 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
58 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
59 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
60 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
61 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
62 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
63 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
64 .len = NFC_FIRMWARE_NAME_MAXSIZE },
65 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
66 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
67
68};
69
70static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
71 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
72 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
73};
74
75static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
76 struct netlink_callback *cb, int flags)
77{
78 void *hdr;
79
80 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
81 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
82 if (!hdr)
83 return -EMSGSIZE;
84
85 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
86
87 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
88 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
89 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
90 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
91 goto nla_put_failure;
92 if (target->nfcid1_len > 0 &&
93 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
94 target->nfcid1))
95 goto nla_put_failure;
96 if (target->sensb_res_len > 0 &&
97 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
98 target->sensb_res))
99 goto nla_put_failure;
100 if (target->sensf_res_len > 0 &&
101 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
102 target->sensf_res))
103 goto nla_put_failure;
104
105 if (target->is_iso15693) {
106 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
107 target->iso15693_dsfid) ||
108 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
109 sizeof(target->iso15693_uid), target->iso15693_uid))
110 goto nla_put_failure;
111 }
112
113 genlmsg_end(msg, hdr);
114 return 0;
115
116nla_put_failure:
117 genlmsg_cancel(msg, hdr);
118 return -EMSGSIZE;
119}
120
121static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
122{
123 struct nfc_dev *dev;
124 int rc;
125 u32 idx;
126
127 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
128 nfc_genl_family.attrbuf,
129 nfc_genl_family.maxattr,
130 nfc_genl_policy);
131 if (rc < 0)
132 return ERR_PTR(rc);
133
134 if (!nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX])
135 return ERR_PTR(-EINVAL);
136
137 idx = nla_get_u32(nfc_genl_family.attrbuf[NFC_ATTR_DEVICE_INDEX]);
138
139 dev = nfc_get_device(idx);
140 if (!dev)
141 return ERR_PTR(-ENODEV);
142
143 return dev;
144}
145
146static int nfc_genl_dump_targets(struct sk_buff *skb,
147 struct netlink_callback *cb)
148{
149 int i = cb->args[0];
150 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
151 int rc;
152
153 if (!dev) {
154 dev = __get_device_from_cb(cb);
155 if (IS_ERR(dev))
156 return PTR_ERR(dev);
157
158 cb->args[1] = (long) dev;
159 }
160
161 device_lock(&dev->dev);
162
163 cb->seq = dev->targets_generation;
164
165 while (i < dev->n_targets) {
166 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
167 NLM_F_MULTI);
168 if (rc < 0)
169 break;
170
171 i++;
172 }
173
174 device_unlock(&dev->dev);
175
176 cb->args[0] = i;
177
178 return skb->len;
179}
180
181static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
182{
183 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
184
185 if (dev)
186 nfc_put_device(dev);
187
188 return 0;
189}
190
191int nfc_genl_targets_found(struct nfc_dev *dev)
192{
193 struct sk_buff *msg;
194 void *hdr;
195
196 dev->genl_data.poll_req_portid = 0;
197
198 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
199 if (!msg)
200 return -ENOMEM;
201
202 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
203 NFC_EVENT_TARGETS_FOUND);
204 if (!hdr)
205 goto free_msg;
206
207 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
208 goto nla_put_failure;
209
210 genlmsg_end(msg, hdr);
211
212 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
213
214nla_put_failure:
215 genlmsg_cancel(msg, hdr);
216free_msg:
217 nlmsg_free(msg);
218 return -EMSGSIZE;
219}
220
221int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
222{
223 struct sk_buff *msg;
224 void *hdr;
225
226 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
227 if (!msg)
228 return -ENOMEM;
229
230 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
231 NFC_EVENT_TARGET_LOST);
232 if (!hdr)
233 goto free_msg;
234
235 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
236 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
237 goto nla_put_failure;
238
239 genlmsg_end(msg, hdr);
240
241 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
242
243 return 0;
244
245nla_put_failure:
246 genlmsg_cancel(msg, hdr);
247free_msg:
248 nlmsg_free(msg);
249 return -EMSGSIZE;
250}
251
252int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
253{
254 struct sk_buff *msg;
255 void *hdr;
256
257 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
258 if (!msg)
259 return -ENOMEM;
260
261 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
262 NFC_EVENT_TM_ACTIVATED);
263 if (!hdr)
264 goto free_msg;
265
266 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
267 goto nla_put_failure;
268 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
269 goto nla_put_failure;
270
271 genlmsg_end(msg, hdr);
272
273 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
274
275 return 0;
276
277nla_put_failure:
278 genlmsg_cancel(msg, hdr);
279free_msg:
280 nlmsg_free(msg);
281 return -EMSGSIZE;
282}
283
284int nfc_genl_tm_deactivated(struct nfc_dev *dev)
285{
286 struct sk_buff *msg;
287 void *hdr;
288
289 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
290 if (!msg)
291 return -ENOMEM;
292
293 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
294 NFC_EVENT_TM_DEACTIVATED);
295 if (!hdr)
296 goto free_msg;
297
298 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
299 goto nla_put_failure;
300
301 genlmsg_end(msg, hdr);
302
303 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
304
305 return 0;
306
307nla_put_failure:
308 genlmsg_cancel(msg, hdr);
309free_msg:
310 nlmsg_free(msg);
311 return -EMSGSIZE;
312}
313
314int nfc_genl_device_added(struct nfc_dev *dev)
315{
316 struct sk_buff *msg;
317 void *hdr;
318
319 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
320 if (!msg)
321 return -ENOMEM;
322
323 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
324 NFC_EVENT_DEVICE_ADDED);
325 if (!hdr)
326 goto free_msg;
327
328 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
329 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
330 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
331 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
332 goto nla_put_failure;
333
334 genlmsg_end(msg, hdr);
335
336 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
337
338 return 0;
339
340nla_put_failure:
341 genlmsg_cancel(msg, hdr);
342free_msg:
343 nlmsg_free(msg);
344 return -EMSGSIZE;
345}
346
347int nfc_genl_device_removed(struct nfc_dev *dev)
348{
349 struct sk_buff *msg;
350 void *hdr;
351
352 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
353 if (!msg)
354 return -ENOMEM;
355
356 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
357 NFC_EVENT_DEVICE_REMOVED);
358 if (!hdr)
359 goto free_msg;
360
361 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
362 goto nla_put_failure;
363
364 genlmsg_end(msg, hdr);
365
366 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
367
368 return 0;
369
370nla_put_failure:
371 genlmsg_cancel(msg, hdr);
372free_msg:
373 nlmsg_free(msg);
374 return -EMSGSIZE;
375}
376
377int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
378{
379 struct sk_buff *msg;
380 struct nlattr *sdp_attr, *uri_attr;
381 struct nfc_llcp_sdp_tlv *sdres;
382 struct hlist_node *n;
383 void *hdr;
384 int rc = -EMSGSIZE;
385 int i;
386
387 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
388 if (!msg)
389 return -ENOMEM;
390
391 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
392 NFC_EVENT_LLC_SDRES);
393 if (!hdr)
394 goto free_msg;
395
396 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
397 goto nla_put_failure;
398
399 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
400 if (sdp_attr == NULL) {
401 rc = -ENOMEM;
402 goto nla_put_failure;
403 }
404
405 i = 1;
406 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
407 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
408
409 uri_attr = nla_nest_start(msg, i++);
410 if (uri_attr == NULL) {
411 rc = -ENOMEM;
412 goto nla_put_failure;
413 }
414
415 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
416 goto nla_put_failure;
417
418 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
419 goto nla_put_failure;
420
421 nla_nest_end(msg, uri_attr);
422
423 hlist_del(&sdres->node);
424
425 nfc_llcp_free_sdp_tlv(sdres);
426 }
427
428 nla_nest_end(msg, sdp_attr);
429
430 genlmsg_end(msg, hdr);
431
432 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
433
434nla_put_failure:
435 genlmsg_cancel(msg, hdr);
436
437free_msg:
438 nlmsg_free(msg);
439
440 nfc_llcp_free_sdp_tlv_list(sdres_list);
441
442 return rc;
443}
444
445int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
446{
447 struct sk_buff *msg;
448 void *hdr;
449
450 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
451 if (!msg)
452 return -ENOMEM;
453
454 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
455 NFC_EVENT_SE_ADDED);
456 if (!hdr)
457 goto free_msg;
458
459 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
460 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
461 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
462 goto nla_put_failure;
463
464 genlmsg_end(msg, hdr);
465
466 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
467
468 return 0;
469
470nla_put_failure:
471 genlmsg_cancel(msg, hdr);
472free_msg:
473 nlmsg_free(msg);
474 return -EMSGSIZE;
475}
476
477int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
478{
479 struct sk_buff *msg;
480 void *hdr;
481
482 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
483 if (!msg)
484 return -ENOMEM;
485
486 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
487 NFC_EVENT_SE_REMOVED);
488 if (!hdr)
489 goto free_msg;
490
491 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
492 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
493 goto nla_put_failure;
494
495 genlmsg_end(msg, hdr);
496
497 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
498
499 return 0;
500
501nla_put_failure:
502 genlmsg_cancel(msg, hdr);
503free_msg:
504 nlmsg_free(msg);
505 return -EMSGSIZE;
506}
507
508int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
509 struct nfc_evt_transaction *evt_transaction)
510{
511 struct nfc_se *se;
512 struct sk_buff *msg;
513 void *hdr;
514
515 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
516 if (!msg)
517 return -ENOMEM;
518
519 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
520 NFC_EVENT_SE_TRANSACTION);
521 if (!hdr)
522 goto free_msg;
523
524 se = nfc_find_se(dev, se_idx);
525 if (!se)
526 goto free_msg;
527
528 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
529 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
530 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
531 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
532 evt_transaction->aid) ||
533 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
534 evt_transaction->params))
535 goto nla_put_failure;
536
537 /* evt_transaction is no more used */
538 devm_kfree(&dev->dev, evt_transaction);
539
540 genlmsg_end(msg, hdr);
541
542 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
543
544 return 0;
545
546nla_put_failure:
547 genlmsg_cancel(msg, hdr);
548free_msg:
549 /* evt_transaction is no more used */
550 devm_kfree(&dev->dev, evt_transaction);
551 nlmsg_free(msg);
552 return -EMSGSIZE;
553}
554
555int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
556{
557 struct nfc_se *se;
558 struct sk_buff *msg;
559 void *hdr;
560
561 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
562 if (!msg)
563 return -ENOMEM;
564
565 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
566 NFC_EVENT_SE_CONNECTIVITY);
567 if (!hdr)
568 goto free_msg;
569
570 se = nfc_find_se(dev, se_idx);
571 if (!se)
572 goto free_msg;
573
574 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
575 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
576 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
577 goto nla_put_failure;
578
579 genlmsg_end(msg, hdr);
580
581 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
582
583 return 0;
584
585nla_put_failure:
586 genlmsg_cancel(msg, hdr);
587free_msg:
588 nlmsg_free(msg);
589 return -EMSGSIZE;
590}
591
592static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
593 u32 portid, u32 seq,
594 struct netlink_callback *cb,
595 int flags)
596{
597 void *hdr;
598
599 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
600 NFC_CMD_GET_DEVICE);
601 if (!hdr)
602 return -EMSGSIZE;
603
604 if (cb)
605 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
606
607 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
608 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
609 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
610 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
611 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
612 goto nla_put_failure;
613
614 genlmsg_end(msg, hdr);
615 return 0;
616
617nla_put_failure:
618 genlmsg_cancel(msg, hdr);
619 return -EMSGSIZE;
620}
621
622static int nfc_genl_dump_devices(struct sk_buff *skb,
623 struct netlink_callback *cb)
624{
625 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
626 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
627 bool first_call = false;
628
629 if (!iter) {
630 first_call = true;
631 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
632 if (!iter)
633 return -ENOMEM;
634 cb->args[0] = (long) iter;
635 }
636
637 mutex_lock(&nfc_devlist_mutex);
638
639 cb->seq = nfc_devlist_generation;
640
641 if (first_call) {
642 nfc_device_iter_init(iter);
643 dev = nfc_device_iter_next(iter);
644 }
645
646 while (dev) {
647 int rc;
648
649 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
650 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
651 if (rc < 0)
652 break;
653
654 dev = nfc_device_iter_next(iter);
655 }
656
657 mutex_unlock(&nfc_devlist_mutex);
658
659 cb->args[1] = (long) dev;
660
661 return skb->len;
662}
663
664static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
665{
666 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
667
668 nfc_device_iter_exit(iter);
669 kfree(iter);
670
671 return 0;
672}
673
674int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
675 u8 comm_mode, u8 rf_mode)
676{
677 struct sk_buff *msg;
678 void *hdr;
679
680 pr_debug("DEP link is up\n");
681
682 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
683 if (!msg)
684 return -ENOMEM;
685
686 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
687 if (!hdr)
688 goto free_msg;
689
690 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
691 goto nla_put_failure;
692 if (rf_mode == NFC_RF_INITIATOR &&
693 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
694 goto nla_put_failure;
695 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
696 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
697 goto nla_put_failure;
698
699 genlmsg_end(msg, hdr);
700
701 dev->dep_link_up = true;
702
703 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
704
705 return 0;
706
707nla_put_failure:
708 genlmsg_cancel(msg, hdr);
709free_msg:
710 nlmsg_free(msg);
711 return -EMSGSIZE;
712}
713
714int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
715{
716 struct sk_buff *msg;
717 void *hdr;
718
719 pr_debug("DEP link is down\n");
720
721 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
722 if (!msg)
723 return -ENOMEM;
724
725 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
726 NFC_CMD_DEP_LINK_DOWN);
727 if (!hdr)
728 goto free_msg;
729
730 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
731 goto nla_put_failure;
732
733 genlmsg_end(msg, hdr);
734
735 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
736
737 return 0;
738
739nla_put_failure:
740 genlmsg_cancel(msg, hdr);
741free_msg:
742 nlmsg_free(msg);
743 return -EMSGSIZE;
744}
745
746static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
747{
748 struct sk_buff *msg;
749 struct nfc_dev *dev;
750 u32 idx;
751 int rc = -ENOBUFS;
752
753 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
754 return -EINVAL;
755
756 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
757
758 dev = nfc_get_device(idx);
759 if (!dev)
760 return -ENODEV;
761
762 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
763 if (!msg) {
764 rc = -ENOMEM;
765 goto out_putdev;
766 }
767
768 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
769 NULL, 0);
770 if (rc < 0)
771 goto out_free;
772
773 nfc_put_device(dev);
774
775 return genlmsg_reply(msg, info);
776
777out_free:
778 nlmsg_free(msg);
779out_putdev:
780 nfc_put_device(dev);
781 return rc;
782}
783
784static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
785{
786 struct nfc_dev *dev;
787 int rc;
788 u32 idx;
789
790 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
791 return -EINVAL;
792
793 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
794
795 dev = nfc_get_device(idx);
796 if (!dev)
797 return -ENODEV;
798
799 rc = nfc_dev_up(dev);
800
801 nfc_put_device(dev);
802 return rc;
803}
804
805static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
806{
807 struct nfc_dev *dev;
808 int rc;
809 u32 idx;
810
811 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
812 return -EINVAL;
813
814 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
815
816 dev = nfc_get_device(idx);
817 if (!dev)
818 return -ENODEV;
819
820 rc = nfc_dev_down(dev);
821
822 nfc_put_device(dev);
823 return rc;
824}
825
826static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
827{
828 struct nfc_dev *dev;
829 int rc;
830 u32 idx;
831 u32 im_protocols = 0, tm_protocols = 0;
832
833 pr_debug("Poll start\n");
834
835 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
836 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
837 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
838 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
839 return -EINVAL;
840
841 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
842
843 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
844 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
845
846 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
847 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
848 else if (info->attrs[NFC_ATTR_PROTOCOLS])
849 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
850
851 dev = nfc_get_device(idx);
852 if (!dev)
853 return -ENODEV;
854
855 mutex_lock(&dev->genl_data.genl_data_mutex);
856
857 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
858 if (!rc)
859 dev->genl_data.poll_req_portid = info->snd_portid;
860
861 mutex_unlock(&dev->genl_data.genl_data_mutex);
862
863 nfc_put_device(dev);
864 return rc;
865}
866
867static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
868{
869 struct nfc_dev *dev;
870 int rc;
871 u32 idx;
872
873 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
874 return -EINVAL;
875
876 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
877
878 dev = nfc_get_device(idx);
879 if (!dev)
880 return -ENODEV;
881
882 device_lock(&dev->dev);
883
884 if (!dev->polling) {
885 device_unlock(&dev->dev);
886 return -EINVAL;
887 }
888
889 device_unlock(&dev->dev);
890
891 mutex_lock(&dev->genl_data.genl_data_mutex);
892
893 if (dev->genl_data.poll_req_portid != info->snd_portid) {
894 rc = -EBUSY;
895 goto out;
896 }
897
898 rc = nfc_stop_poll(dev);
899 dev->genl_data.poll_req_portid = 0;
900
901out:
902 mutex_unlock(&dev->genl_data.genl_data_mutex);
903 nfc_put_device(dev);
904 return rc;
905}
906
907static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
908{
909 struct nfc_dev *dev;
910 u32 device_idx, target_idx, protocol;
911 int rc;
912
913 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
914 return -EINVAL;
915
916 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
917
918 dev = nfc_get_device(device_idx);
919 if (!dev)
920 return -ENODEV;
921
922 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
923 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
924
925 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
926 rc = nfc_activate_target(dev, target_idx, protocol);
927
928 nfc_put_device(dev);
929 return 0;
930}
931
932static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
933{
934 struct nfc_dev *dev;
935 int rc, tgt_idx;
936 u32 idx;
937 u8 comm;
938
939 pr_debug("DEP link up\n");
940
941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
942 !info->attrs[NFC_ATTR_COMM_MODE])
943 return -EINVAL;
944
945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
946 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
947 tgt_idx = NFC_TARGET_IDX_ANY;
948 else
949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
950
951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
952
953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
954 return -EINVAL;
955
956 dev = nfc_get_device(idx);
957 if (!dev)
958 return -ENODEV;
959
960 rc = nfc_dep_link_up(dev, tgt_idx, comm);
961
962 nfc_put_device(dev);
963
964 return rc;
965}
966
967static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
968{
969 struct nfc_dev *dev;
970 int rc;
971 u32 idx;
972
973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
974 return -EINVAL;
975
976 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
977
978 dev = nfc_get_device(idx);
979 if (!dev)
980 return -ENODEV;
981
982 rc = nfc_dep_link_down(dev);
983
984 nfc_put_device(dev);
985 return rc;
986}
987
988static int nfc_genl_send_params(struct sk_buff *msg,
989 struct nfc_llcp_local *local,
990 u32 portid, u32 seq)
991{
992 void *hdr;
993
994 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
995 NFC_CMD_LLC_GET_PARAMS);
996 if (!hdr)
997 return -EMSGSIZE;
998
999 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1000 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1002 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1003 goto nla_put_failure;
1004
1005 genlmsg_end(msg, hdr);
1006 return 0;
1007
1008nla_put_failure:
1009
1010 genlmsg_cancel(msg, hdr);
1011 return -EMSGSIZE;
1012}
1013
1014static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1015{
1016 struct nfc_dev *dev;
1017 struct nfc_llcp_local *local;
1018 int rc = 0;
1019 struct sk_buff *msg = NULL;
1020 u32 idx;
1021
1022 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1023 return -EINVAL;
1024
1025 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1026
1027 dev = nfc_get_device(idx);
1028 if (!dev)
1029 return -ENODEV;
1030
1031 device_lock(&dev->dev);
1032
1033 local = nfc_llcp_find_local(dev);
1034 if (!local) {
1035 rc = -ENODEV;
1036 goto exit;
1037 }
1038
1039 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1040 if (!msg) {
1041 rc = -ENOMEM;
1042 goto exit;
1043 }
1044
1045 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1046
1047exit:
1048 device_unlock(&dev->dev);
1049
1050 nfc_put_device(dev);
1051
1052 if (rc < 0) {
1053 if (msg)
1054 nlmsg_free(msg);
1055
1056 return rc;
1057 }
1058
1059 return genlmsg_reply(msg, info);
1060}
1061
1062static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1063{
1064 struct nfc_dev *dev;
1065 struct nfc_llcp_local *local;
1066 u8 rw = 0;
1067 u16 miux = 0;
1068 u32 idx;
1069 int rc = 0;
1070
1071 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1072 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1073 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1074 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1075 return -EINVAL;
1076
1077 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1078 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1079
1080 if (rw > LLCP_MAX_RW)
1081 return -EINVAL;
1082 }
1083
1084 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1085 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1086
1087 if (miux > LLCP_MAX_MIUX)
1088 return -EINVAL;
1089 }
1090
1091 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1092
1093 dev = nfc_get_device(idx);
1094 if (!dev)
1095 return -ENODEV;
1096
1097 device_lock(&dev->dev);
1098
1099 local = nfc_llcp_find_local(dev);
1100 if (!local) {
1101 nfc_put_device(dev);
1102 rc = -ENODEV;
1103 goto exit;
1104 }
1105
1106 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1107 if (dev->dep_link_up) {
1108 rc = -EINPROGRESS;
1109 goto exit;
1110 }
1111
1112 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1113 }
1114
1115 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1116 local->rw = rw;
1117
1118 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1119 local->miux = cpu_to_be16(miux);
1120
1121exit:
1122 device_unlock(&dev->dev);
1123
1124 nfc_put_device(dev);
1125
1126 return rc;
1127}
1128
1129static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1130{
1131 struct nfc_dev *dev;
1132 struct nfc_llcp_local *local;
1133 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1134 u32 idx;
1135 u8 tid;
1136 char *uri;
1137 int rc = 0, rem;
1138 size_t uri_len, tlvs_len;
1139 struct hlist_head sdreq_list;
1140 struct nfc_llcp_sdp_tlv *sdreq;
1141
1142 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1143 !info->attrs[NFC_ATTR_LLC_SDP])
1144 return -EINVAL;
1145
1146 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1147
1148 dev = nfc_get_device(idx);
1149 if (!dev)
1150 return -ENODEV;
1151
1152 device_lock(&dev->dev);
1153
1154 if (dev->dep_link_up == false) {
1155 rc = -ENOLINK;
1156 goto exit;
1157 }
1158
1159 local = nfc_llcp_find_local(dev);
1160 if (!local) {
1161 nfc_put_device(dev);
1162 rc = -ENODEV;
1163 goto exit;
1164 }
1165
1166 INIT_HLIST_HEAD(&sdreq_list);
1167
1168 tlvs_len = 0;
1169
1170 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1171 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1172 nfc_sdp_genl_policy);
1173
1174 if (rc != 0) {
1175 rc = -EINVAL;
1176 goto exit;
1177 }
1178
1179 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1180 continue;
1181
1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri_len == 0)
1184 continue;
1185
1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1187 if (uri == NULL || *uri == 0)
1188 continue;
1189
1190 tid = local->sdreq_next_tid++;
1191
1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1193 if (sdreq == NULL) {
1194 rc = -ENOMEM;
1195 goto exit;
1196 }
1197
1198 tlvs_len += sdreq->tlv_len;
1199
1200 hlist_add_head(&sdreq->node, &sdreq_list);
1201 }
1202
1203 if (hlist_empty(&sdreq_list)) {
1204 rc = -EINVAL;
1205 goto exit;
1206 }
1207
1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1209exit:
1210 device_unlock(&dev->dev);
1211
1212 nfc_put_device(dev);
1213
1214 return rc;
1215}
1216
1217static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1218{
1219 struct nfc_dev *dev;
1220 int rc;
1221 u32 idx;
1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1223
1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1225 return -EINVAL;
1226
1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1228
1229 dev = nfc_get_device(idx);
1230 if (!dev)
1231 return -ENODEV;
1232
1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1234 sizeof(firmware_name));
1235
1236 rc = nfc_fw_download(dev, firmware_name);
1237
1238 nfc_put_device(dev);
1239 return rc;
1240}
1241
1242int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1243 u32 result)
1244{
1245 struct sk_buff *msg;
1246 void *hdr;
1247
1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1253 NFC_CMD_FW_DOWNLOAD);
1254 if (!hdr)
1255 goto free_msg;
1256
1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1260 goto nla_put_failure;
1261
1262 genlmsg_end(msg, hdr);
1263
1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1265
1266 return 0;
1267
1268nla_put_failure:
1269 genlmsg_cancel(msg, hdr);
1270free_msg:
1271 nlmsg_free(msg);
1272 return -EMSGSIZE;
1273}
1274
1275static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1276{
1277 struct nfc_dev *dev;
1278 int rc;
1279 u32 idx, se_idx;
1280
1281 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1282 !info->attrs[NFC_ATTR_SE_INDEX])
1283 return -EINVAL;
1284
1285 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1286 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1287
1288 dev = nfc_get_device(idx);
1289 if (!dev)
1290 return -ENODEV;
1291
1292 rc = nfc_enable_se(dev, se_idx);
1293
1294 nfc_put_device(dev);
1295 return rc;
1296}
1297
1298static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1299{
1300 struct nfc_dev *dev;
1301 int rc;
1302 u32 idx, se_idx;
1303
1304 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1305 !info->attrs[NFC_ATTR_SE_INDEX])
1306 return -EINVAL;
1307
1308 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1309 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1310
1311 dev = nfc_get_device(idx);
1312 if (!dev)
1313 return -ENODEV;
1314
1315 rc = nfc_disable_se(dev, se_idx);
1316
1317 nfc_put_device(dev);
1318 return rc;
1319}
1320
1321static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1322 u32 portid, u32 seq,
1323 struct netlink_callback *cb,
1324 int flags)
1325{
1326 void *hdr;
1327 struct nfc_se *se, *n;
1328
1329 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1330 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1331 NFC_CMD_GET_SE);
1332 if (!hdr)
1333 goto nla_put_failure;
1334
1335 if (cb)
1336 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1337
1338 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1339 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1340 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1341 goto nla_put_failure;
1342
1343 genlmsg_end(msg, hdr);
1344 }
1345
1346 return 0;
1347
1348nla_put_failure:
1349 genlmsg_cancel(msg, hdr);
1350 return -EMSGSIZE;
1351}
1352
1353static int nfc_genl_dump_ses(struct sk_buff *skb,
1354 struct netlink_callback *cb)
1355{
1356 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1357 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1358 bool first_call = false;
1359
1360 if (!iter) {
1361 first_call = true;
1362 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1363 if (!iter)
1364 return -ENOMEM;
1365 cb->args[0] = (long) iter;
1366 }
1367
1368 mutex_lock(&nfc_devlist_mutex);
1369
1370 cb->seq = nfc_devlist_generation;
1371
1372 if (first_call) {
1373 nfc_device_iter_init(iter);
1374 dev = nfc_device_iter_next(iter);
1375 }
1376
1377 while (dev) {
1378 int rc;
1379
1380 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1381 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1382 if (rc < 0)
1383 break;
1384
1385 dev = nfc_device_iter_next(iter);
1386 }
1387
1388 mutex_unlock(&nfc_devlist_mutex);
1389
1390 cb->args[1] = (long) dev;
1391
1392 return skb->len;
1393}
1394
1395static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1396{
1397 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1398
1399 nfc_device_iter_exit(iter);
1400 kfree(iter);
1401
1402 return 0;
1403}
1404
1405static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1406 u8 *apdu, size_t apdu_length,
1407 se_io_cb_t cb, void *cb_context)
1408{
1409 struct nfc_se *se;
1410 int rc;
1411
1412 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1413
1414 device_lock(&dev->dev);
1415
1416 if (!device_is_registered(&dev->dev)) {
1417 rc = -ENODEV;
1418 goto error;
1419 }
1420
1421 if (!dev->dev_up) {
1422 rc = -ENODEV;
1423 goto error;
1424 }
1425
1426 if (!dev->ops->se_io) {
1427 rc = -EOPNOTSUPP;
1428 goto error;
1429 }
1430
1431 se = nfc_find_se(dev, se_idx);
1432 if (!se) {
1433 rc = -EINVAL;
1434 goto error;
1435 }
1436
1437 if (se->state != NFC_SE_ENABLED) {
1438 rc = -ENODEV;
1439 goto error;
1440 }
1441
1442 rc = dev->ops->se_io(dev, se_idx, apdu,
1443 apdu_length, cb, cb_context);
1444
1445error:
1446 device_unlock(&dev->dev);
1447 return rc;
1448}
1449
1450struct se_io_ctx {
1451 u32 dev_idx;
1452 u32 se_idx;
1453};
1454
1455static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1456{
1457 struct se_io_ctx *ctx = context;
1458 struct sk_buff *msg;
1459 void *hdr;
1460
1461 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1462 if (!msg) {
1463 kfree(ctx);
1464 return;
1465 }
1466
1467 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1468 NFC_CMD_SE_IO);
1469 if (!hdr)
1470 goto free_msg;
1471
1472 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1473 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1474 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1475 goto nla_put_failure;
1476
1477 genlmsg_end(msg, hdr);
1478
1479 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1480
1481 kfree(ctx);
1482
1483 return;
1484
1485nla_put_failure:
1486 genlmsg_cancel(msg, hdr);
1487free_msg:
1488 nlmsg_free(msg);
1489 kfree(ctx);
1490
1491 return;
1492}
1493
1494static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1495{
1496 struct nfc_dev *dev;
1497 struct se_io_ctx *ctx;
1498 u32 dev_idx, se_idx;
1499 u8 *apdu;
1500 size_t apdu_len;
1501
1502 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1503 !info->attrs[NFC_ATTR_SE_INDEX] ||
1504 !info->attrs[NFC_ATTR_SE_APDU])
1505 return -EINVAL;
1506
1507 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1508 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1509
1510 dev = nfc_get_device(dev_idx);
1511 if (!dev)
1512 return -ENODEV;
1513
1514 if (!dev->ops || !dev->ops->se_io)
1515 return -ENOTSUPP;
1516
1517 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1518 if (apdu_len == 0)
1519 return -EINVAL;
1520
1521 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1522 if (!apdu)
1523 return -EINVAL;
1524
1525 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1526 if (!ctx)
1527 return -ENOMEM;
1528
1529 ctx->dev_idx = dev_idx;
1530 ctx->se_idx = se_idx;
1531
1532 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1533}
1534
1535static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1536 struct genl_info *info)
1537{
1538 struct nfc_dev *dev;
1539 struct nfc_vendor_cmd *cmd;
1540 u32 dev_idx, vid, subcmd;
1541 u8 *data;
1542 size_t data_len;
1543 int i, err;
1544
1545 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1546 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1547 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1548 return -EINVAL;
1549
1550 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1551 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1552 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1553
1554 dev = nfc_get_device(dev_idx);
1555 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1556 return -ENODEV;
1557
1558 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1559 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1560 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1561 if (data_len == 0)
1562 return -EINVAL;
1563 } else {
1564 data = NULL;
1565 data_len = 0;
1566 }
1567
1568 for (i = 0; i < dev->n_vendor_cmds; i++) {
1569 cmd = &dev->vendor_cmds[i];
1570
1571 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1572 continue;
1573
1574 dev->cur_cmd_info = info;
1575 err = cmd->doit(dev, data, data_len);
1576 dev->cur_cmd_info = NULL;
1577 return err;
1578 }
1579
1580 return -EOPNOTSUPP;
1581}
1582
1583/* message building helper */
1584static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1585 int flags, u8 cmd)
1586{
1587 /* since there is no private header just add the generic one */
1588 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1589}
1590
1591static struct sk_buff *
1592__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1593 u32 portid, u32 seq,
1594 enum nfc_attrs attr,
1595 u32 oui, u32 subcmd, gfp_t gfp)
1596{
1597 struct sk_buff *skb;
1598 void *hdr;
1599
1600 skb = nlmsg_new(approxlen + 100, gfp);
1601 if (!skb)
1602 return NULL;
1603
1604 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1605 if (!hdr) {
1606 kfree_skb(skb);
1607 return NULL;
1608 }
1609
1610 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1611 goto nla_put_failure;
1612 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1613 goto nla_put_failure;
1614 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1615 goto nla_put_failure;
1616
1617 ((void **)skb->cb)[0] = dev;
1618 ((void **)skb->cb)[1] = hdr;
1619
1620 return skb;
1621
1622nla_put_failure:
1623 kfree_skb(skb);
1624 return NULL;
1625}
1626
1627struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1628 enum nfc_attrs attr,
1629 u32 oui, u32 subcmd,
1630 int approxlen)
1631{
1632 if (WARN_ON(!dev->cur_cmd_info))
1633 return NULL;
1634
1635 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1636 dev->cur_cmd_info->snd_portid,
1637 dev->cur_cmd_info->snd_seq, attr,
1638 oui, subcmd, GFP_KERNEL);
1639}
1640EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1641
1642int nfc_vendor_cmd_reply(struct sk_buff *skb)
1643{
1644 struct nfc_dev *dev = ((void **)skb->cb)[0];
1645 void *hdr = ((void **)skb->cb)[1];
1646
1647 /* clear CB data for netlink core to own from now on */
1648 memset(skb->cb, 0, sizeof(skb->cb));
1649
1650 if (WARN_ON(!dev->cur_cmd_info)) {
1651 kfree_skb(skb);
1652 return -EINVAL;
1653 }
1654
1655 genlmsg_end(skb, hdr);
1656 return genlmsg_reply(skb, dev->cur_cmd_info);
1657}
1658EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1659
1660static const struct genl_ops nfc_genl_ops[] = {
1661 {
1662 .cmd = NFC_CMD_GET_DEVICE,
1663 .doit = nfc_genl_get_device,
1664 .dumpit = nfc_genl_dump_devices,
1665 .done = nfc_genl_dump_devices_done,
1666 .policy = nfc_genl_policy,
1667 },
1668 {
1669 .cmd = NFC_CMD_DEV_UP,
1670 .doit = nfc_genl_dev_up,
1671 .policy = nfc_genl_policy,
1672 },
1673 {
1674 .cmd = NFC_CMD_DEV_DOWN,
1675 .doit = nfc_genl_dev_down,
1676 .policy = nfc_genl_policy,
1677 },
1678 {
1679 .cmd = NFC_CMD_START_POLL,
1680 .doit = nfc_genl_start_poll,
1681 .policy = nfc_genl_policy,
1682 },
1683 {
1684 .cmd = NFC_CMD_STOP_POLL,
1685 .doit = nfc_genl_stop_poll,
1686 .policy = nfc_genl_policy,
1687 },
1688 {
1689 .cmd = NFC_CMD_DEP_LINK_UP,
1690 .doit = nfc_genl_dep_link_up,
1691 .policy = nfc_genl_policy,
1692 },
1693 {
1694 .cmd = NFC_CMD_DEP_LINK_DOWN,
1695 .doit = nfc_genl_dep_link_down,
1696 .policy = nfc_genl_policy,
1697 },
1698 {
1699 .cmd = NFC_CMD_GET_TARGET,
1700 .dumpit = nfc_genl_dump_targets,
1701 .done = nfc_genl_dump_targets_done,
1702 .policy = nfc_genl_policy,
1703 },
1704 {
1705 .cmd = NFC_CMD_LLC_GET_PARAMS,
1706 .doit = nfc_genl_llc_get_params,
1707 .policy = nfc_genl_policy,
1708 },
1709 {
1710 .cmd = NFC_CMD_LLC_SET_PARAMS,
1711 .doit = nfc_genl_llc_set_params,
1712 .policy = nfc_genl_policy,
1713 },
1714 {
1715 .cmd = NFC_CMD_LLC_SDREQ,
1716 .doit = nfc_genl_llc_sdreq,
1717 .policy = nfc_genl_policy,
1718 },
1719 {
1720 .cmd = NFC_CMD_FW_DOWNLOAD,
1721 .doit = nfc_genl_fw_download,
1722 .policy = nfc_genl_policy,
1723 },
1724 {
1725 .cmd = NFC_CMD_ENABLE_SE,
1726 .doit = nfc_genl_enable_se,
1727 .policy = nfc_genl_policy,
1728 },
1729 {
1730 .cmd = NFC_CMD_DISABLE_SE,
1731 .doit = nfc_genl_disable_se,
1732 .policy = nfc_genl_policy,
1733 },
1734 {
1735 .cmd = NFC_CMD_GET_SE,
1736 .dumpit = nfc_genl_dump_ses,
1737 .done = nfc_genl_dump_ses_done,
1738 .policy = nfc_genl_policy,
1739 },
1740 {
1741 .cmd = NFC_CMD_SE_IO,
1742 .doit = nfc_genl_se_io,
1743 .policy = nfc_genl_policy,
1744 },
1745 {
1746 .cmd = NFC_CMD_ACTIVATE_TARGET,
1747 .doit = nfc_genl_activate_target,
1748 .policy = nfc_genl_policy,
1749 },
1750 {
1751 .cmd = NFC_CMD_VENDOR,
1752 .doit = nfc_genl_vendor_cmd,
1753 .policy = nfc_genl_policy,
1754 },
1755};
1756
1757
1758struct urelease_work {
1759 struct work_struct w;
1760 u32 portid;
1761};
1762
1763static void nfc_urelease_event_work(struct work_struct *work)
1764{
1765 struct urelease_work *w = container_of(work, struct urelease_work, w);
1766 struct class_dev_iter iter;
1767 struct nfc_dev *dev;
1768
1769 pr_debug("portid %d\n", w->portid);
1770
1771 mutex_lock(&nfc_devlist_mutex);
1772
1773 nfc_device_iter_init(&iter);
1774 dev = nfc_device_iter_next(&iter);
1775
1776 while (dev) {
1777 mutex_lock(&dev->genl_data.genl_data_mutex);
1778
1779 if (dev->genl_data.poll_req_portid == w->portid) {
1780 nfc_stop_poll(dev);
1781 dev->genl_data.poll_req_portid = 0;
1782 }
1783
1784 mutex_unlock(&dev->genl_data.genl_data_mutex);
1785
1786 dev = nfc_device_iter_next(&iter);
1787 }
1788
1789 nfc_device_iter_exit(&iter);
1790
1791 mutex_unlock(&nfc_devlist_mutex);
1792
1793 kfree(w);
1794}
1795
1796static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1797 unsigned long event, void *ptr)
1798{
1799 struct netlink_notify *n = ptr;
1800 struct urelease_work *w;
1801
1802 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1803 goto out;
1804
1805 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1806
1807 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1808 if (w) {
1809 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1810 w->portid = n->portid;
1811 schedule_work((struct work_struct *) w);
1812 }
1813
1814out:
1815 return NOTIFY_DONE;
1816}
1817
1818void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1819{
1820 genl_data->poll_req_portid = 0;
1821 mutex_init(&genl_data->genl_data_mutex);
1822}
1823
1824void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1825{
1826 mutex_destroy(&genl_data->genl_data_mutex);
1827}
1828
1829static struct notifier_block nl_notifier = {
1830 .notifier_call = nfc_genl_rcv_nl_event,
1831};
1832
1833/**
1834 * nfc_genl_init() - Initialize netlink interface
1835 *
1836 * This initialization function registers the nfc netlink family.
1837 */
1838int __init nfc_genl_init(void)
1839{
1840 int rc;
1841
1842 rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1843 nfc_genl_ops,
1844 nfc_genl_mcgrps);
1845 if (rc)
1846 return rc;
1847
1848 netlink_register_notifier(&nl_notifier);
1849
1850 return 0;
1851}
1852
1853/**
1854 * nfc_genl_exit() - Deinitialize netlink interface
1855 *
1856 * This exit function unregisters the nfc netlink family.
1857 */
1858void nfc_genl_exit(void)
1859{
1860 netlink_unregister_notifier(&nl_notifier);
1861 genl_unregister_family(&nfc_genl_family);
1862}