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