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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 <[email protected]>
7 * Aloisio Almeida Jr <[email protected]>
8 *
9 * Vendor commands implementation based on net/wireless/nl80211.c
10 * which is:
11 *
12 * Copyright 2006-2010 Johannes Berg <[email protected]>
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_obj(struct class_dev_iter);
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 free_list;
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 == 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 free_list;
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
1218free_list:
1219 nfc_llcp_free_sdp_tlv_list(&sdreq_list);
1220
1221put_local:
1222 nfc_llcp_local_put(local);
1223
1224exit:
1225 device_unlock(&dev->dev);
1226
1227 nfc_put_device(dev);
1228
1229 return rc;
1230}
1231
1232static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1233{
1234 struct nfc_dev *dev;
1235 int rc;
1236 u32 idx;
1237 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1238
1239 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] || !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1240 return -EINVAL;
1241
1242 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1243
1244 dev = nfc_get_device(idx);
1245 if (!dev)
1246 return -ENODEV;
1247
1248 nla_strscpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1249 sizeof(firmware_name));
1250
1251 rc = nfc_fw_download(dev, firmware_name);
1252
1253 nfc_put_device(dev);
1254 return rc;
1255}
1256
1257int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1258 u32 result)
1259{
1260 struct sk_buff *msg;
1261 void *hdr;
1262
1263 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1264 if (!msg)
1265 return -ENOMEM;
1266
1267 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1268 NFC_CMD_FW_DOWNLOAD);
1269 if (!hdr)
1270 goto free_msg;
1271
1272 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1273 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1274 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1275 goto nla_put_failure;
1276
1277 genlmsg_end(msg, hdr);
1278
1279 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
1280
1281 return 0;
1282
1283nla_put_failure:
1284free_msg:
1285 nlmsg_free(msg);
1286 return -EMSGSIZE;
1287}
1288
1289static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1290{
1291 struct nfc_dev *dev;
1292 int rc;
1293 u32 idx, se_idx;
1294
1295 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1296 !info->attrs[NFC_ATTR_SE_INDEX])
1297 return -EINVAL;
1298
1299 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1300 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1301
1302 dev = nfc_get_device(idx);
1303 if (!dev)
1304 return -ENODEV;
1305
1306 rc = nfc_enable_se(dev, se_idx);
1307
1308 nfc_put_device(dev);
1309 return rc;
1310}
1311
1312static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1313{
1314 struct nfc_dev *dev;
1315 int rc;
1316 u32 idx, se_idx;
1317
1318 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1319 !info->attrs[NFC_ATTR_SE_INDEX])
1320 return -EINVAL;
1321
1322 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1323 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1324
1325 dev = nfc_get_device(idx);
1326 if (!dev)
1327 return -ENODEV;
1328
1329 rc = nfc_disable_se(dev, se_idx);
1330
1331 nfc_put_device(dev);
1332 return rc;
1333}
1334
1335static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1336 u32 portid, u32 seq,
1337 struct netlink_callback *cb,
1338 int flags)
1339{
1340 void *hdr;
1341 struct nfc_se *se, *n;
1342
1343 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1344 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1345 NFC_CMD_GET_SE);
1346 if (!hdr)
1347 goto nla_put_failure;
1348
1349 if (cb)
1350 genl_dump_check_consistent(cb, hdr);
1351
1352 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1353 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1354 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1355 goto nla_put_failure;
1356
1357 genlmsg_end(msg, hdr);
1358 }
1359
1360 return 0;
1361
1362nla_put_failure:
1363 genlmsg_cancel(msg, hdr);
1364 return -EMSGSIZE;
1365}
1366
1367static int nfc_genl_dump_ses(struct sk_buff *skb,
1368 struct netlink_callback *cb)
1369{
1370 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1371 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1372 bool first_call = false;
1373
1374 if (!iter) {
1375 first_call = true;
1376 iter = kmalloc_obj(struct class_dev_iter);
1377 if (!iter)
1378 return -ENOMEM;
1379 cb->args[0] = (long) iter;
1380 }
1381
1382 mutex_lock(&nfc_devlist_mutex);
1383
1384 cb->seq = nfc_devlist_generation;
1385
1386 if (first_call) {
1387 nfc_device_iter_init(iter);
1388 dev = nfc_device_iter_next(iter);
1389 }
1390
1391 while (dev) {
1392 int rc;
1393
1394 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1395 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1396 if (rc < 0)
1397 break;
1398
1399 dev = nfc_device_iter_next(iter);
1400 }
1401
1402 mutex_unlock(&nfc_devlist_mutex);
1403
1404 cb->args[1] = (long) dev;
1405
1406 return skb->len;
1407}
1408
1409static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1410{
1411 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1412
1413 if (iter) {
1414 nfc_device_iter_exit(iter);
1415 kfree(iter);
1416 }
1417
1418 return 0;
1419}
1420
1421static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1422 u8 *apdu, size_t apdu_length,
1423 se_io_cb_t cb, void *cb_context)
1424{
1425 struct nfc_se *se;
1426 int rc;
1427
1428 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1429
1430 device_lock(&dev->dev);
1431
1432 if (!device_is_registered(&dev->dev)) {
1433 rc = -ENODEV;
1434 goto error;
1435 }
1436
1437 if (!dev->dev_up) {
1438 rc = -ENODEV;
1439 goto error;
1440 }
1441
1442 if (!dev->ops->se_io) {
1443 rc = -EOPNOTSUPP;
1444 goto error;
1445 }
1446
1447 se = nfc_find_se(dev, se_idx);
1448 if (!se) {
1449 rc = -EINVAL;
1450 goto error;
1451 }
1452
1453 if (se->state != NFC_SE_ENABLED) {
1454 rc = -ENODEV;
1455 goto error;
1456 }
1457
1458 rc = dev->ops->se_io(dev, se_idx, apdu,
1459 apdu_length, cb, cb_context);
1460
1461 device_unlock(&dev->dev);
1462 return rc;
1463
1464error:
1465 device_unlock(&dev->dev);
1466 kfree(cb_context);
1467 return rc;
1468}
1469
1470struct se_io_ctx {
1471 u32 dev_idx;
1472 u32 se_idx;
1473};
1474
1475static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1476{
1477 struct se_io_ctx *ctx = context;
1478 struct sk_buff *msg;
1479 void *hdr;
1480
1481 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1482 if (!msg) {
1483 kfree(ctx);
1484 return;
1485 }
1486
1487 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1488 NFC_CMD_SE_IO);
1489 if (!hdr)
1490 goto free_msg;
1491
1492 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1493 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1494 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1495 goto nla_put_failure;
1496
1497 genlmsg_end(msg, hdr);
1498
1499 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1500
1501 kfree(ctx);
1502
1503 return;
1504
1505nla_put_failure:
1506free_msg:
1507 nlmsg_free(msg);
1508 kfree(ctx);
1509
1510 return;
1511}
1512
1513static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1514{
1515 struct nfc_dev *dev;
1516 struct se_io_ctx *ctx;
1517 u32 dev_idx, se_idx;
1518 u8 *apdu;
1519 size_t apdu_len;
1520 int rc;
1521
1522 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1523 !info->attrs[NFC_ATTR_SE_INDEX] ||
1524 !info->attrs[NFC_ATTR_SE_APDU])
1525 return -EINVAL;
1526
1527 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1528 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1529
1530 dev = nfc_get_device(dev_idx);
1531 if (!dev)
1532 return -ENODEV;
1533
1534 if (!dev->ops || !dev->ops->se_io) {
1535 rc = -EOPNOTSUPP;
1536 goto put_dev;
1537 }
1538
1539 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1540 if (apdu_len == 0) {
1541 rc = -EINVAL;
1542 goto put_dev;
1543 }
1544
1545 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1546
1547 ctx = kzalloc_obj(struct se_io_ctx);
1548 if (!ctx) {
1549 rc = -ENOMEM;
1550 goto put_dev;
1551 }
1552
1553 ctx->dev_idx = dev_idx;
1554 ctx->se_idx = se_idx;
1555
1556 rc = nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1557
1558put_dev:
1559 nfc_put_device(dev);
1560 return rc;
1561}
1562
1563static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1564 struct genl_info *info)
1565{
1566 struct nfc_dev *dev;
1567 const struct nfc_vendor_cmd *cmd;
1568 u32 dev_idx, vid, subcmd;
1569 u8 *data;
1570 size_t data_len;
1571 int i, err;
1572
1573 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1574 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1575 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1576 return -EINVAL;
1577
1578 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1579 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1580 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1581
1582 dev = nfc_get_device(dev_idx);
1583 if (!dev)
1584 return -ENODEV;
1585
1586 if (!dev->vendor_cmds || !dev->n_vendor_cmds) {
1587 err = -ENODEV;
1588 goto put_dev;
1589 }
1590
1591 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1592 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1593 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1594 if (data_len == 0) {
1595 err = -EINVAL;
1596 goto put_dev;
1597 }
1598 } else {
1599 data = NULL;
1600 data_len = 0;
1601 }
1602
1603 for (i = 0; i < dev->n_vendor_cmds; i++) {
1604 cmd = &dev->vendor_cmds[i];
1605
1606 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1607 continue;
1608
1609 dev->cur_cmd_info = info;
1610 err = cmd->doit(dev, data, data_len);
1611 dev->cur_cmd_info = NULL;
1612 goto put_dev;
1613 }
1614
1615 err = -EOPNOTSUPP;
1616
1617put_dev:
1618 nfc_put_device(dev);
1619 return err;
1620}
1621
1622/* message building helper */
1623static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1624 int flags, u8 cmd)
1625{
1626 /* since there is no private header just add the generic one */
1627 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1628}
1629
1630static struct sk_buff *
1631__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1632 u32 portid, u32 seq,
1633 enum nfc_attrs attr,
1634 u32 oui, u32 subcmd, gfp_t gfp)
1635{
1636 struct sk_buff *skb;
1637 void *hdr;
1638
1639 skb = nlmsg_new(approxlen + 100, gfp);
1640 if (!skb)
1641 return NULL;
1642
1643 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1644 if (!hdr) {
1645 kfree_skb(skb);
1646 return NULL;
1647 }
1648
1649 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1650 goto nla_put_failure;
1651 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1652 goto nla_put_failure;
1653 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1654 goto nla_put_failure;
1655
1656 ((void **)skb->cb)[0] = dev;
1657 ((void **)skb->cb)[1] = hdr;
1658
1659 return skb;
1660
1661nla_put_failure:
1662 kfree_skb(skb);
1663 return NULL;
1664}
1665
1666struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1667 enum nfc_attrs attr,
1668 u32 oui, u32 subcmd,
1669 int approxlen)
1670{
1671 if (WARN_ON(!dev->cur_cmd_info))
1672 return NULL;
1673
1674 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1675 dev->cur_cmd_info->snd_portid,
1676 dev->cur_cmd_info->snd_seq, attr,
1677 oui, subcmd, GFP_KERNEL);
1678}
1679EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1680
1681int nfc_vendor_cmd_reply(struct sk_buff *skb)
1682{
1683 struct nfc_dev *dev = ((void **)skb->cb)[0];
1684 void *hdr = ((void **)skb->cb)[1];
1685
1686 /* clear CB data for netlink core to own from now on */
1687 memset(skb->cb, 0, sizeof(skb->cb));
1688
1689 if (WARN_ON(!dev->cur_cmd_info)) {
1690 kfree_skb(skb);
1691 return -EINVAL;
1692 }
1693
1694 genlmsg_end(skb, hdr);
1695 return genlmsg_reply(skb, dev->cur_cmd_info);
1696}
1697EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1698
1699static const struct genl_ops nfc_genl_ops[] = {
1700 {
1701 .cmd = NFC_CMD_GET_DEVICE,
1702 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1703 .doit = nfc_genl_get_device,
1704 .dumpit = nfc_genl_dump_devices,
1705 .done = nfc_genl_dump_devices_done,
1706 },
1707 {
1708 .cmd = NFC_CMD_DEV_UP,
1709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1710 .doit = nfc_genl_dev_up,
1711 .flags = GENL_ADMIN_PERM,
1712 },
1713 {
1714 .cmd = NFC_CMD_DEV_DOWN,
1715 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1716 .doit = nfc_genl_dev_down,
1717 .flags = GENL_ADMIN_PERM,
1718 },
1719 {
1720 .cmd = NFC_CMD_START_POLL,
1721 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1722 .doit = nfc_genl_start_poll,
1723 .flags = GENL_ADMIN_PERM,
1724 },
1725 {
1726 .cmd = NFC_CMD_STOP_POLL,
1727 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1728 .doit = nfc_genl_stop_poll,
1729 .flags = GENL_ADMIN_PERM,
1730 },
1731 {
1732 .cmd = NFC_CMD_DEP_LINK_UP,
1733 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1734 .doit = nfc_genl_dep_link_up,
1735 .flags = GENL_ADMIN_PERM,
1736 },
1737 {
1738 .cmd = NFC_CMD_DEP_LINK_DOWN,
1739 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1740 .doit = nfc_genl_dep_link_down,
1741 .flags = GENL_ADMIN_PERM,
1742 },
1743 {
1744 .cmd = NFC_CMD_GET_TARGET,
1745 .validate = GENL_DONT_VALIDATE_STRICT |
1746 GENL_DONT_VALIDATE_DUMP_STRICT,
1747 .dumpit = nfc_genl_dump_targets,
1748 .done = nfc_genl_dump_targets_done,
1749 },
1750 {
1751 .cmd = NFC_CMD_LLC_GET_PARAMS,
1752 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1753 .doit = nfc_genl_llc_get_params,
1754 },
1755 {
1756 .cmd = NFC_CMD_LLC_SET_PARAMS,
1757 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1758 .doit = nfc_genl_llc_set_params,
1759 .flags = GENL_ADMIN_PERM,
1760 },
1761 {
1762 .cmd = NFC_CMD_LLC_SDREQ,
1763 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1764 .doit = nfc_genl_llc_sdreq,
1765 .flags = GENL_ADMIN_PERM,
1766 },
1767 {
1768 .cmd = NFC_CMD_FW_DOWNLOAD,
1769 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1770 .doit = nfc_genl_fw_download,
1771 .flags = GENL_ADMIN_PERM,
1772 },
1773 {
1774 .cmd = NFC_CMD_ENABLE_SE,
1775 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1776 .doit = nfc_genl_enable_se,
1777 .flags = GENL_ADMIN_PERM,
1778 },
1779 {
1780 .cmd = NFC_CMD_DISABLE_SE,
1781 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1782 .doit = nfc_genl_disable_se,
1783 .flags = GENL_ADMIN_PERM,
1784 },
1785 {
1786 .cmd = NFC_CMD_GET_SE,
1787 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1788 .dumpit = nfc_genl_dump_ses,
1789 .done = nfc_genl_dump_ses_done,
1790 },
1791 {
1792 .cmd = NFC_CMD_SE_IO,
1793 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1794 .doit = nfc_genl_se_io,
1795 .flags = GENL_ADMIN_PERM,
1796 },
1797 {
1798 .cmd = NFC_CMD_ACTIVATE_TARGET,
1799 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1800 .doit = nfc_genl_activate_target,
1801 .flags = GENL_ADMIN_PERM,
1802 },
1803 {
1804 .cmd = NFC_CMD_VENDOR,
1805 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1806 .doit = nfc_genl_vendor_cmd,
1807 .flags = GENL_ADMIN_PERM,
1808 },
1809 {
1810 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1811 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1812 .doit = nfc_genl_deactivate_target,
1813 .flags = GENL_ADMIN_PERM,
1814 },
1815};
1816
1817static struct genl_family nfc_genl_family __ro_after_init = {
1818 .hdrsize = 0,
1819 .name = NFC_GENL_NAME,
1820 .version = NFC_GENL_VERSION,
1821 .maxattr = NFC_ATTR_MAX,
1822 .policy = nfc_genl_policy,
1823 .module = THIS_MODULE,
1824 .ops = nfc_genl_ops,
1825 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1826 .resv_start_op = NFC_CMD_DEACTIVATE_TARGET + 1,
1827 .mcgrps = nfc_genl_mcgrps,
1828 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1829};
1830
1831
1832struct urelease_work {
1833 struct work_struct w;
1834 u32 portid;
1835};
1836
1837static void nfc_urelease_event_work(struct work_struct *work)
1838{
1839 struct urelease_work *w = container_of(work, struct urelease_work, w);
1840 struct class_dev_iter iter;
1841 struct nfc_dev *dev;
1842
1843 pr_debug("portid %d\n", w->portid);
1844
1845 mutex_lock(&nfc_devlist_mutex);
1846
1847 nfc_device_iter_init(&iter);
1848 dev = nfc_device_iter_next(&iter);
1849
1850 while (dev) {
1851 mutex_lock(&dev->genl_data.genl_data_mutex);
1852
1853 if (dev->genl_data.poll_req_portid == w->portid) {
1854 nfc_stop_poll(dev);
1855 dev->genl_data.poll_req_portid = 0;
1856 }
1857
1858 mutex_unlock(&dev->genl_data.genl_data_mutex);
1859
1860 dev = nfc_device_iter_next(&iter);
1861 }
1862
1863 nfc_device_iter_exit(&iter);
1864
1865 mutex_unlock(&nfc_devlist_mutex);
1866
1867 kfree(w);
1868}
1869
1870static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1871 unsigned long event, void *ptr)
1872{
1873 struct netlink_notify *n = ptr;
1874 struct urelease_work *w;
1875
1876 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1877 goto out;
1878
1879 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1880
1881 w = kmalloc_obj(*w, GFP_ATOMIC);
1882 if (w) {
1883 INIT_WORK(&w->w, nfc_urelease_event_work);
1884 w->portid = n->portid;
1885 schedule_work(&w->w);
1886 }
1887
1888out:
1889 return NOTIFY_DONE;
1890}
1891
1892void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1893{
1894 genl_data->poll_req_portid = 0;
1895 mutex_init(&genl_data->genl_data_mutex);
1896}
1897
1898void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1899{
1900 mutex_destroy(&genl_data->genl_data_mutex);
1901}
1902
1903static struct notifier_block nl_notifier = {
1904 .notifier_call = nfc_genl_rcv_nl_event,
1905};
1906
1907/**
1908 * nfc_genl_init() - Initialize netlink interface
1909 *
1910 * This initialization function registers the nfc netlink family.
1911 */
1912int __init nfc_genl_init(void)
1913{
1914 int rc;
1915
1916 rc = genl_register_family(&nfc_genl_family);
1917 if (rc)
1918 return rc;
1919
1920 netlink_register_notifier(&nl_notifier);
1921
1922 return 0;
1923}
1924
1925/**
1926 * nfc_genl_exit() - Deinitialize netlink interface
1927 *
1928 * This exit function unregisters the nfc netlink family.
1929 */
1930void nfc_genl_exit(void)
1931{
1932 netlink_unregister_notifier(&nl_notifier);
1933 genl_unregister_family(&nfc_genl_family);
1934}