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