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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 * 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}