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