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[mirror_ubuntu-jammy-kernel.git] / net / nfc / netlink.c
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
25 static const struct genl_multicast_group nfc_genl_mcgrps[] = {
26 { .name = NFC_GENL_MCAST_EVENT_NAME, },
27 };
28
29 static struct genl_family nfc_genl_family;
30 static 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_COMM_MODE] = { .type = NLA_U8 },
36 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
37 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
38 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
39 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
40 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
41 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
42 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
43 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
44 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
45 .len = NFC_FIRMWARE_NAME_MAXSIZE },
46 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
47 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
48
49 };
50
51 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
52 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING,
53 .len = U8_MAX - 4 },
54 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
55 };
56
57 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
58 struct netlink_callback *cb, int flags)
59 {
60 void *hdr;
61
62 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
63 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
64 if (!hdr)
65 return -EMSGSIZE;
66
67 genl_dump_check_consistent(cb, hdr);
68
69 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
70 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
71 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
72 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
73 goto nla_put_failure;
74 if (target->nfcid1_len > 0 &&
75 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
76 target->nfcid1))
77 goto nla_put_failure;
78 if (target->sensb_res_len > 0 &&
79 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
80 target->sensb_res))
81 goto nla_put_failure;
82 if (target->sensf_res_len > 0 &&
83 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
84 target->sensf_res))
85 goto nla_put_failure;
86
87 if (target->is_iso15693) {
88 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
89 target->iso15693_dsfid) ||
90 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
91 sizeof(target->iso15693_uid), target->iso15693_uid))
92 goto nla_put_failure;
93 }
94
95 genlmsg_end(msg, hdr);
96 return 0;
97
98 nla_put_failure:
99 genlmsg_cancel(msg, hdr);
100 return -EMSGSIZE;
101 }
102
103 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
104 {
105 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
106 struct nfc_dev *dev;
107 int rc;
108 u32 idx;
109
110 rc = nlmsg_parse_deprecated(cb->nlh,
111 GENL_HDRLEN + nfc_genl_family.hdrsize,
112 attrbuf, nfc_genl_family.maxattr,
113 nfc_genl_policy, NULL);
114 if (rc < 0)
115 return ERR_PTR(rc);
116
117 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
118 return ERR_PTR(-EINVAL);
119
120 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
121
122 dev = nfc_get_device(idx);
123 if (!dev)
124 return ERR_PTR(-ENODEV);
125
126 return dev;
127 }
128
129 static int nfc_genl_dump_targets(struct sk_buff *skb,
130 struct netlink_callback *cb)
131 {
132 int i = cb->args[0];
133 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
134 int rc;
135
136 if (!dev) {
137 dev = __get_device_from_cb(cb);
138 if (IS_ERR(dev))
139 return PTR_ERR(dev);
140
141 cb->args[1] = (long) dev;
142 }
143
144 device_lock(&dev->dev);
145
146 cb->seq = dev->targets_generation;
147
148 while (i < dev->n_targets) {
149 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
150 NLM_F_MULTI);
151 if (rc < 0)
152 break;
153
154 i++;
155 }
156
157 device_unlock(&dev->dev);
158
159 cb->args[0] = i;
160
161 return skb->len;
162 }
163
164 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
165 {
166 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
167
168 if (dev)
169 nfc_put_device(dev);
170
171 return 0;
172 }
173
174 int nfc_genl_targets_found(struct nfc_dev *dev)
175 {
176 struct sk_buff *msg;
177 void *hdr;
178
179 dev->genl_data.poll_req_portid = 0;
180
181 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
182 if (!msg)
183 return -ENOMEM;
184
185 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
186 NFC_EVENT_TARGETS_FOUND);
187 if (!hdr)
188 goto free_msg;
189
190 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
191 goto nla_put_failure;
192
193 genlmsg_end(msg, hdr);
194
195 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
196
197 nla_put_failure:
198 free_msg:
199 nlmsg_free(msg);
200 return -EMSGSIZE;
201 }
202
203 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
204 {
205 struct sk_buff *msg;
206 void *hdr;
207
208 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
209 if (!msg)
210 return -ENOMEM;
211
212 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
213 NFC_EVENT_TARGET_LOST);
214 if (!hdr)
215 goto free_msg;
216
217 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
218 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
219 goto nla_put_failure;
220
221 genlmsg_end(msg, hdr);
222
223 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
224
225 return 0;
226
227 nla_put_failure:
228 free_msg:
229 nlmsg_free(msg);
230 return -EMSGSIZE;
231 }
232
233 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
234 {
235 struct sk_buff *msg;
236 void *hdr;
237
238 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
239 if (!msg)
240 return -ENOMEM;
241
242 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
243 NFC_EVENT_TM_ACTIVATED);
244 if (!hdr)
245 goto free_msg;
246
247 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
248 goto nla_put_failure;
249 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
250 goto nla_put_failure;
251
252 genlmsg_end(msg, hdr);
253
254 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
255
256 return 0;
257
258 nla_put_failure:
259 free_msg:
260 nlmsg_free(msg);
261 return -EMSGSIZE;
262 }
263
264 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
265 {
266 struct sk_buff *msg;
267 void *hdr;
268
269 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
270 if (!msg)
271 return -ENOMEM;
272
273 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
274 NFC_EVENT_TM_DEACTIVATED);
275 if (!hdr)
276 goto free_msg;
277
278 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
279 goto nla_put_failure;
280
281 genlmsg_end(msg, hdr);
282
283 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
284
285 return 0;
286
287 nla_put_failure:
288 free_msg:
289 nlmsg_free(msg);
290 return -EMSGSIZE;
291 }
292
293 static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
294 {
295 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
296 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
297 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
298 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
299 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
300 return -1;
301 return 0;
302 }
303
304 int nfc_genl_device_added(struct nfc_dev *dev)
305 {
306 struct sk_buff *msg;
307 void *hdr;
308
309 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
310 if (!msg)
311 return -ENOMEM;
312
313 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
314 NFC_EVENT_DEVICE_ADDED);
315 if (!hdr)
316 goto free_msg;
317
318 if (nfc_genl_setup_device_added(dev, msg))
319 goto nla_put_failure;
320
321 genlmsg_end(msg, hdr);
322
323 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
324
325 return 0;
326
327 nla_put_failure:
328 free_msg:
329 nlmsg_free(msg);
330 return -EMSGSIZE;
331 }
332
333 int nfc_genl_device_removed(struct nfc_dev *dev)
334 {
335 struct sk_buff *msg;
336 void *hdr;
337
338 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
339 if (!msg)
340 return -ENOMEM;
341
342 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
343 NFC_EVENT_DEVICE_REMOVED);
344 if (!hdr)
345 goto free_msg;
346
347 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
348 goto nla_put_failure;
349
350 genlmsg_end(msg, hdr);
351
352 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
353
354 return 0;
355
356 nla_put_failure:
357 free_msg:
358 nlmsg_free(msg);
359 return -EMSGSIZE;
360 }
361
362 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
363 {
364 struct sk_buff *msg;
365 struct nlattr *sdp_attr, *uri_attr;
366 struct nfc_llcp_sdp_tlv *sdres;
367 struct hlist_node *n;
368 void *hdr;
369 int rc = -EMSGSIZE;
370 int i;
371
372 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
373 if (!msg)
374 return -ENOMEM;
375
376 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
377 NFC_EVENT_LLC_SDRES);
378 if (!hdr)
379 goto free_msg;
380
381 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
382 goto nla_put_failure;
383
384 sdp_attr = nla_nest_start_noflag(msg, NFC_ATTR_LLC_SDP);
385 if (sdp_attr == NULL) {
386 rc = -ENOMEM;
387 goto nla_put_failure;
388 }
389
390 i = 1;
391 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
392 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
393
394 uri_attr = nla_nest_start_noflag(msg, i++);
395 if (uri_attr == NULL) {
396 rc = -ENOMEM;
397 goto nla_put_failure;
398 }
399
400 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
401 goto nla_put_failure;
402
403 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
404 goto nla_put_failure;
405
406 nla_nest_end(msg, uri_attr);
407
408 hlist_del(&sdres->node);
409
410 nfc_llcp_free_sdp_tlv(sdres);
411 }
412
413 nla_nest_end(msg, sdp_attr);
414
415 genlmsg_end(msg, hdr);
416
417 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
418
419 nla_put_failure:
420 free_msg:
421 nlmsg_free(msg);
422
423 nfc_llcp_free_sdp_tlv_list(sdres_list);
424
425 return rc;
426 }
427
428 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
429 {
430 struct sk_buff *msg;
431 void *hdr;
432
433 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
434 if (!msg)
435 return -ENOMEM;
436
437 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
438 NFC_EVENT_SE_ADDED);
439 if (!hdr)
440 goto free_msg;
441
442 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
443 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
444 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
445 goto nla_put_failure;
446
447 genlmsg_end(msg, hdr);
448
449 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
450
451 return 0;
452
453 nla_put_failure:
454 free_msg:
455 nlmsg_free(msg);
456 return -EMSGSIZE;
457 }
458
459 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
460 {
461 struct sk_buff *msg;
462 void *hdr;
463
464 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
465 if (!msg)
466 return -ENOMEM;
467
468 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
469 NFC_EVENT_SE_REMOVED);
470 if (!hdr)
471 goto free_msg;
472
473 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
474 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
475 goto nla_put_failure;
476
477 genlmsg_end(msg, hdr);
478
479 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
480
481 return 0;
482
483 nla_put_failure:
484 free_msg:
485 nlmsg_free(msg);
486 return -EMSGSIZE;
487 }
488
489 int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
490 struct nfc_evt_transaction *evt_transaction)
491 {
492 struct nfc_se *se;
493 struct sk_buff *msg;
494 void *hdr;
495
496 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
497 if (!msg)
498 return -ENOMEM;
499
500 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
501 NFC_EVENT_SE_TRANSACTION);
502 if (!hdr)
503 goto free_msg;
504
505 se = nfc_find_se(dev, se_idx);
506 if (!se)
507 goto free_msg;
508
509 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
510 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
511 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
512 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
513 evt_transaction->aid) ||
514 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
515 evt_transaction->params))
516 goto nla_put_failure;
517
518 /* evt_transaction is no more used */
519 devm_kfree(&dev->dev, evt_transaction);
520
521 genlmsg_end(msg, hdr);
522
523 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
524
525 return 0;
526
527 nla_put_failure:
528 free_msg:
529 /* evt_transaction is no more used */
530 devm_kfree(&dev->dev, evt_transaction);
531 nlmsg_free(msg);
532 return -EMSGSIZE;
533 }
534
535 int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
536 {
537 struct nfc_se *se;
538 struct sk_buff *msg;
539 void *hdr;
540
541 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
542 if (!msg)
543 return -ENOMEM;
544
545 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
546 NFC_EVENT_SE_CONNECTIVITY);
547 if (!hdr)
548 goto free_msg;
549
550 se = nfc_find_se(dev, se_idx);
551 if (!se)
552 goto free_msg;
553
554 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
555 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
556 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
557 goto nla_put_failure;
558
559 genlmsg_end(msg, hdr);
560
561 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
562
563 return 0;
564
565 nla_put_failure:
566 free_msg:
567 nlmsg_free(msg);
568 return -EMSGSIZE;
569 }
570
571 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
572 u32 portid, u32 seq,
573 struct netlink_callback *cb,
574 int flags)
575 {
576 void *hdr;
577
578 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
579 NFC_CMD_GET_DEVICE);
580 if (!hdr)
581 return -EMSGSIZE;
582
583 if (cb)
584 genl_dump_check_consistent(cb, hdr);
585
586 if (nfc_genl_setup_device_added(dev, msg))
587 goto nla_put_failure;
588
589 genlmsg_end(msg, hdr);
590 return 0;
591
592 nla_put_failure:
593 genlmsg_cancel(msg, hdr);
594 return -EMSGSIZE;
595 }
596
597 static int nfc_genl_dump_devices(struct sk_buff *skb,
598 struct netlink_callback *cb)
599 {
600 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
601 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
602 bool first_call = false;
603
604 if (!iter) {
605 first_call = true;
606 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
607 if (!iter)
608 return -ENOMEM;
609 cb->args[0] = (long) iter;
610 }
611
612 mutex_lock(&nfc_devlist_mutex);
613
614 cb->seq = nfc_devlist_generation;
615
616 if (first_call) {
617 nfc_device_iter_init(iter);
618 dev = nfc_device_iter_next(iter);
619 }
620
621 while (dev) {
622 int rc;
623
624 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
625 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
626 if (rc < 0)
627 break;
628
629 dev = nfc_device_iter_next(iter);
630 }
631
632 mutex_unlock(&nfc_devlist_mutex);
633
634 cb->args[1] = (long) dev;
635
636 return skb->len;
637 }
638
639 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
640 {
641 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
642
643 nfc_device_iter_exit(iter);
644 kfree(iter);
645
646 return 0;
647 }
648
649 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
650 u8 comm_mode, u8 rf_mode)
651 {
652 struct sk_buff *msg;
653 void *hdr;
654
655 pr_debug("DEP link is up\n");
656
657 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
658 if (!msg)
659 return -ENOMEM;
660
661 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
662 if (!hdr)
663 goto free_msg;
664
665 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
666 goto nla_put_failure;
667 if (rf_mode == NFC_RF_INITIATOR &&
668 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
669 goto nla_put_failure;
670 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
671 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
672 goto nla_put_failure;
673
674 genlmsg_end(msg, hdr);
675
676 dev->dep_link_up = true;
677
678 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
679
680 return 0;
681
682 nla_put_failure:
683 free_msg:
684 nlmsg_free(msg);
685 return -EMSGSIZE;
686 }
687
688 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
689 {
690 struct sk_buff *msg;
691 void *hdr;
692
693 pr_debug("DEP link is down\n");
694
695 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
696 if (!msg)
697 return -ENOMEM;
698
699 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
700 NFC_CMD_DEP_LINK_DOWN);
701 if (!hdr)
702 goto free_msg;
703
704 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
705 goto nla_put_failure;
706
707 genlmsg_end(msg, hdr);
708
709 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
710
711 return 0;
712
713 nla_put_failure:
714 free_msg:
715 nlmsg_free(msg);
716 return -EMSGSIZE;
717 }
718
719 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
720 {
721 struct sk_buff *msg;
722 struct nfc_dev *dev;
723 u32 idx;
724 int rc = -ENOBUFS;
725
726 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
727 return -EINVAL;
728
729 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
730
731 dev = nfc_get_device(idx);
732 if (!dev)
733 return -ENODEV;
734
735 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
736 if (!msg) {
737 rc = -ENOMEM;
738 goto out_putdev;
739 }
740
741 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
742 NULL, 0);
743 if (rc < 0)
744 goto out_free;
745
746 nfc_put_device(dev);
747
748 return genlmsg_reply(msg, info);
749
750 out_free:
751 nlmsg_free(msg);
752 out_putdev:
753 nfc_put_device(dev);
754 return rc;
755 }
756
757 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
758 {
759 struct nfc_dev *dev;
760 int rc;
761 u32 idx;
762
763 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
764 return -EINVAL;
765
766 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
767
768 dev = nfc_get_device(idx);
769 if (!dev)
770 return -ENODEV;
771
772 rc = nfc_dev_up(dev);
773
774 nfc_put_device(dev);
775 return rc;
776 }
777
778 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
779 {
780 struct nfc_dev *dev;
781 int rc;
782 u32 idx;
783
784 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
785 return -EINVAL;
786
787 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
788
789 dev = nfc_get_device(idx);
790 if (!dev)
791 return -ENODEV;
792
793 rc = nfc_dev_down(dev);
794
795 nfc_put_device(dev);
796 return rc;
797 }
798
799 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
800 {
801 struct nfc_dev *dev;
802 int rc;
803 u32 idx;
804 u32 im_protocols = 0, tm_protocols = 0;
805
806 pr_debug("Poll start\n");
807
808 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
809 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
810 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
811 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
812 return -EINVAL;
813
814 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
815
816 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
817 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
818
819 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
820 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
821 else if (info->attrs[NFC_ATTR_PROTOCOLS])
822 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
823
824 dev = nfc_get_device(idx);
825 if (!dev)
826 return -ENODEV;
827
828 mutex_lock(&dev->genl_data.genl_data_mutex);
829
830 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
831 if (!rc)
832 dev->genl_data.poll_req_portid = info->snd_portid;
833
834 mutex_unlock(&dev->genl_data.genl_data_mutex);
835
836 nfc_put_device(dev);
837 return rc;
838 }
839
840 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
841 {
842 struct nfc_dev *dev;
843 int rc;
844 u32 idx;
845
846 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
847 return -EINVAL;
848
849 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
850
851 dev = nfc_get_device(idx);
852 if (!dev)
853 return -ENODEV;
854
855 device_lock(&dev->dev);
856
857 if (!dev->polling) {
858 device_unlock(&dev->dev);
859 return -EINVAL;
860 }
861
862 device_unlock(&dev->dev);
863
864 mutex_lock(&dev->genl_data.genl_data_mutex);
865
866 if (dev->genl_data.poll_req_portid != info->snd_portid) {
867 rc = -EBUSY;
868 goto out;
869 }
870
871 rc = nfc_stop_poll(dev);
872 dev->genl_data.poll_req_portid = 0;
873
874 out:
875 mutex_unlock(&dev->genl_data.genl_data_mutex);
876 nfc_put_device(dev);
877 return rc;
878 }
879
880 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
881 {
882 struct nfc_dev *dev;
883 u32 device_idx, target_idx, protocol;
884 int rc;
885
886 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
887 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
888 !info->attrs[NFC_ATTR_PROTOCOLS])
889 return -EINVAL;
890
891 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
892
893 dev = nfc_get_device(device_idx);
894 if (!dev)
895 return -ENODEV;
896
897 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
898 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
899
900 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
901 rc = nfc_activate_target(dev, target_idx, protocol);
902
903 nfc_put_device(dev);
904 return rc;
905 }
906
907 static int nfc_genl_deactivate_target(struct sk_buff *skb,
908 struct genl_info *info)
909 {
910 struct nfc_dev *dev;
911 u32 device_idx, target_idx;
912 int rc;
913
914 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
915 !info->attrs[NFC_ATTR_TARGET_INDEX])
916 return -EINVAL;
917
918 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
919
920 dev = nfc_get_device(device_idx);
921 if (!dev)
922 return -ENODEV;
923
924 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
925
926 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
927
928 nfc_put_device(dev);
929 return rc;
930 }
931
932 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
933 {
934 struct nfc_dev *dev;
935 int rc, tgt_idx;
936 u32 idx;
937 u8 comm;
938
939 pr_debug("DEP link up\n");
940
941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
942 !info->attrs[NFC_ATTR_COMM_MODE])
943 return -EINVAL;
944
945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
946 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
947 tgt_idx = NFC_TARGET_IDX_ANY;
948 else
949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
950
951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
952
953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
954 return -EINVAL;
955
956 dev = nfc_get_device(idx);
957 if (!dev)
958 return -ENODEV;
959
960 rc = nfc_dep_link_up(dev, tgt_idx, comm);
961
962 nfc_put_device(dev);
963
964 return rc;
965 }
966
967 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
968 {
969 struct nfc_dev *dev;
970 int rc;
971 u32 idx;
972
973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
974 return -EINVAL;
975
976 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
977
978 dev = nfc_get_device(idx);
979 if (!dev)
980 return -ENODEV;
981
982 rc = nfc_dep_link_down(dev);
983
984 nfc_put_device(dev);
985 return rc;
986 }
987
988 static int nfc_genl_send_params(struct sk_buff *msg,
989 struct nfc_llcp_local *local,
990 u32 portid, u32 seq)
991 {
992 void *hdr;
993
994 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
995 NFC_CMD_LLC_GET_PARAMS);
996 if (!hdr)
997 return -EMSGSIZE;
998
999 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1000 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1002 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1003 goto nla_put_failure;
1004
1005 genlmsg_end(msg, hdr);
1006 return 0;
1007
1008 nla_put_failure:
1009 genlmsg_cancel(msg, hdr);
1010 return -EMSGSIZE;
1011 }
1012
1013 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1014 {
1015 struct nfc_dev *dev;
1016 struct nfc_llcp_local *local;
1017 int rc = 0;
1018 struct sk_buff *msg = NULL;
1019 u32 idx;
1020
1021 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1022 return -EINVAL;
1023
1024 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1025
1026 dev = nfc_get_device(idx);
1027 if (!dev)
1028 return -ENODEV;
1029
1030 device_lock(&dev->dev);
1031
1032 local = nfc_llcp_find_local(dev);
1033 if (!local) {
1034 rc = -ENODEV;
1035 goto exit;
1036 }
1037
1038 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1039 if (!msg) {
1040 rc = -ENOMEM;
1041 goto exit;
1042 }
1043
1044 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1045
1046 exit:
1047 device_unlock(&dev->dev);
1048
1049 nfc_put_device(dev);
1050
1051 if (rc < 0) {
1052 if (msg)
1053 nlmsg_free(msg);
1054
1055 return rc;
1056 }
1057
1058 return genlmsg_reply(msg, info);
1059 }
1060
1061 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1062 {
1063 struct nfc_dev *dev;
1064 struct nfc_llcp_local *local;
1065 u8 rw = 0;
1066 u16 miux = 0;
1067 u32 idx;
1068 int rc = 0;
1069
1070 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1071 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1072 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1073 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1074 return -EINVAL;
1075
1076 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1077 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1078
1079 if (rw > LLCP_MAX_RW)
1080 return -EINVAL;
1081 }
1082
1083 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1084 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1085
1086 if (miux > LLCP_MAX_MIUX)
1087 return -EINVAL;
1088 }
1089
1090 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1091
1092 dev = nfc_get_device(idx);
1093 if (!dev)
1094 return -ENODEV;
1095
1096 device_lock(&dev->dev);
1097
1098 local = nfc_llcp_find_local(dev);
1099 if (!local) {
1100 nfc_put_device(dev);
1101 rc = -ENODEV;
1102 goto exit;
1103 }
1104
1105 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1106 if (dev->dep_link_up) {
1107 rc = -EINPROGRESS;
1108 goto exit;
1109 }
1110
1111 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1112 }
1113
1114 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1115 local->rw = rw;
1116
1117 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1118 local->miux = cpu_to_be16(miux);
1119
1120 exit:
1121 device_unlock(&dev->dev);
1122
1123 nfc_put_device(dev);
1124
1125 return rc;
1126 }
1127
1128 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1129 {
1130 struct nfc_dev *dev;
1131 struct nfc_llcp_local *local;
1132 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1133 u32 idx;
1134 u8 tid;
1135 char *uri;
1136 int rc = 0, rem;
1137 size_t uri_len, tlvs_len;
1138 struct hlist_head sdreq_list;
1139 struct nfc_llcp_sdp_tlv *sdreq;
1140
1141 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1142 !info->attrs[NFC_ATTR_LLC_SDP])
1143 return -EINVAL;
1144
1145 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1146
1147 dev = nfc_get_device(idx);
1148 if (!dev)
1149 return -ENODEV;
1150
1151 device_lock(&dev->dev);
1152
1153 if (dev->dep_link_up == false) {
1154 rc = -ENOLINK;
1155 goto exit;
1156 }
1157
1158 local = nfc_llcp_find_local(dev);
1159 if (!local) {
1160 nfc_put_device(dev);
1161 rc = -ENODEV;
1162 goto exit;
1163 }
1164
1165 INIT_HLIST_HEAD(&sdreq_list);
1166
1167 tlvs_len = 0;
1168
1169 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1170 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1171 attr, nfc_sdp_genl_policy,
1172 info->extack);
1173
1174 if (rc != 0) {
1175 rc = -EINVAL;
1176 goto exit;
1177 }
1178
1179 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1180 continue;
1181
1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri_len == 0)
1184 continue;
1185
1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1187 if (uri == NULL || *uri == 0)
1188 continue;
1189
1190 tid = local->sdreq_next_tid++;
1191
1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1193 if (sdreq == NULL) {
1194 rc = -ENOMEM;
1195 goto exit;
1196 }
1197
1198 tlvs_len += sdreq->tlv_len;
1199
1200 hlist_add_head(&sdreq->node, &sdreq_list);
1201 }
1202
1203 if (hlist_empty(&sdreq_list)) {
1204 rc = -EINVAL;
1205 goto exit;
1206 }
1207
1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1209 exit:
1210 device_unlock(&dev->dev);
1211
1212 nfc_put_device(dev);
1213
1214 return rc;
1215 }
1216
1217 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1218 {
1219 struct nfc_dev *dev;
1220 int rc;
1221 u32 idx;
1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1223
1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1225 return -EINVAL;
1226
1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1228
1229 dev = nfc_get_device(idx);
1230 if (!dev)
1231 return -ENODEV;
1232
1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1234 sizeof(firmware_name));
1235
1236 rc = nfc_fw_download(dev, firmware_name);
1237
1238 nfc_put_device(dev);
1239 return rc;
1240 }
1241
1242 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1243 u32 result)
1244 {
1245 struct sk_buff *msg;
1246 void *hdr;
1247
1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1253 NFC_CMD_FW_DOWNLOAD);
1254 if (!hdr)
1255 goto free_msg;
1256
1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1260 goto nla_put_failure;
1261
1262 genlmsg_end(msg, hdr);
1263
1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1265
1266 return 0;
1267
1268 nla_put_failure:
1269 free_msg:
1270 nlmsg_free(msg);
1271 return -EMSGSIZE;
1272 }
1273
1274 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1275 {
1276 struct nfc_dev *dev;
1277 int rc;
1278 u32 idx, se_idx;
1279
1280 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1281 !info->attrs[NFC_ATTR_SE_INDEX])
1282 return -EINVAL;
1283
1284 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1285 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1286
1287 dev = nfc_get_device(idx);
1288 if (!dev)
1289 return -ENODEV;
1290
1291 rc = nfc_enable_se(dev, se_idx);
1292
1293 nfc_put_device(dev);
1294 return rc;
1295 }
1296
1297 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1298 {
1299 struct nfc_dev *dev;
1300 int rc;
1301 u32 idx, se_idx;
1302
1303 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1304 !info->attrs[NFC_ATTR_SE_INDEX])
1305 return -EINVAL;
1306
1307 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1308 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1309
1310 dev = nfc_get_device(idx);
1311 if (!dev)
1312 return -ENODEV;
1313
1314 rc = nfc_disable_se(dev, se_idx);
1315
1316 nfc_put_device(dev);
1317 return rc;
1318 }
1319
1320 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1321 u32 portid, u32 seq,
1322 struct netlink_callback *cb,
1323 int flags)
1324 {
1325 void *hdr;
1326 struct nfc_se *se, *n;
1327
1328 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1329 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1330 NFC_CMD_GET_SE);
1331 if (!hdr)
1332 goto nla_put_failure;
1333
1334 if (cb)
1335 genl_dump_check_consistent(cb, hdr);
1336
1337 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1338 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1339 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1340 goto nla_put_failure;
1341
1342 genlmsg_end(msg, hdr);
1343 }
1344
1345 return 0;
1346
1347 nla_put_failure:
1348 genlmsg_cancel(msg, hdr);
1349 return -EMSGSIZE;
1350 }
1351
1352 static int nfc_genl_dump_ses(struct sk_buff *skb,
1353 struct netlink_callback *cb)
1354 {
1355 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1356 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1357 bool first_call = false;
1358
1359 if (!iter) {
1360 first_call = true;
1361 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1362 if (!iter)
1363 return -ENOMEM;
1364 cb->args[0] = (long) iter;
1365 }
1366
1367 mutex_lock(&nfc_devlist_mutex);
1368
1369 cb->seq = nfc_devlist_generation;
1370
1371 if (first_call) {
1372 nfc_device_iter_init(iter);
1373 dev = nfc_device_iter_next(iter);
1374 }
1375
1376 while (dev) {
1377 int rc;
1378
1379 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1380 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1381 if (rc < 0)
1382 break;
1383
1384 dev = nfc_device_iter_next(iter);
1385 }
1386
1387 mutex_unlock(&nfc_devlist_mutex);
1388
1389 cb->args[1] = (long) dev;
1390
1391 return skb->len;
1392 }
1393
1394 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1395 {
1396 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1397
1398 nfc_device_iter_exit(iter);
1399 kfree(iter);
1400
1401 return 0;
1402 }
1403
1404 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1405 u8 *apdu, size_t apdu_length,
1406 se_io_cb_t cb, void *cb_context)
1407 {
1408 struct nfc_se *se;
1409 int rc;
1410
1411 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1412
1413 device_lock(&dev->dev);
1414
1415 if (!device_is_registered(&dev->dev)) {
1416 rc = -ENODEV;
1417 goto error;
1418 }
1419
1420 if (!dev->dev_up) {
1421 rc = -ENODEV;
1422 goto error;
1423 }
1424
1425 if (!dev->ops->se_io) {
1426 rc = -EOPNOTSUPP;
1427 goto error;
1428 }
1429
1430 se = nfc_find_se(dev, se_idx);
1431 if (!se) {
1432 rc = -EINVAL;
1433 goto error;
1434 }
1435
1436 if (se->state != NFC_SE_ENABLED) {
1437 rc = -ENODEV;
1438 goto error;
1439 }
1440
1441 rc = dev->ops->se_io(dev, se_idx, apdu,
1442 apdu_length, cb, cb_context);
1443
1444 error:
1445 device_unlock(&dev->dev);
1446 return rc;
1447 }
1448
1449 struct se_io_ctx {
1450 u32 dev_idx;
1451 u32 se_idx;
1452 };
1453
1454 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1455 {
1456 struct se_io_ctx *ctx = context;
1457 struct sk_buff *msg;
1458 void *hdr;
1459
1460 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1461 if (!msg) {
1462 kfree(ctx);
1463 return;
1464 }
1465
1466 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1467 NFC_CMD_SE_IO);
1468 if (!hdr)
1469 goto free_msg;
1470
1471 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1472 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1473 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1474 goto nla_put_failure;
1475
1476 genlmsg_end(msg, hdr);
1477
1478 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1479
1480 kfree(ctx);
1481
1482 return;
1483
1484 nla_put_failure:
1485 free_msg:
1486 nlmsg_free(msg);
1487 kfree(ctx);
1488
1489 return;
1490 }
1491
1492 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1493 {
1494 struct nfc_dev *dev;
1495 struct se_io_ctx *ctx;
1496 u32 dev_idx, se_idx;
1497 u8 *apdu;
1498 size_t apdu_len;
1499
1500 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1501 !info->attrs[NFC_ATTR_SE_INDEX] ||
1502 !info->attrs[NFC_ATTR_SE_APDU])
1503 return -EINVAL;
1504
1505 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1506 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1507
1508 dev = nfc_get_device(dev_idx);
1509 if (!dev)
1510 return -ENODEV;
1511
1512 if (!dev->ops || !dev->ops->se_io)
1513 return -ENOTSUPP;
1514
1515 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1516 if (apdu_len == 0)
1517 return -EINVAL;
1518
1519 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1520 if (!apdu)
1521 return -EINVAL;
1522
1523 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1524 if (!ctx)
1525 return -ENOMEM;
1526
1527 ctx->dev_idx = dev_idx;
1528 ctx->se_idx = se_idx;
1529
1530 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1531 }
1532
1533 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1534 struct genl_info *info)
1535 {
1536 struct nfc_dev *dev;
1537 struct nfc_vendor_cmd *cmd;
1538 u32 dev_idx, vid, subcmd;
1539 u8 *data;
1540 size_t data_len;
1541 int i, err;
1542
1543 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1544 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1545 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1546 return -EINVAL;
1547
1548 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1549 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1550 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1551
1552 dev = nfc_get_device(dev_idx);
1553 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1554 return -ENODEV;
1555
1556 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1557 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1558 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1559 if (data_len == 0)
1560 return -EINVAL;
1561 } else {
1562 data = NULL;
1563 data_len = 0;
1564 }
1565
1566 for (i = 0; i < dev->n_vendor_cmds; i++) {
1567 cmd = &dev->vendor_cmds[i];
1568
1569 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1570 continue;
1571
1572 dev->cur_cmd_info = info;
1573 err = cmd->doit(dev, data, data_len);
1574 dev->cur_cmd_info = NULL;
1575 return err;
1576 }
1577
1578 return -EOPNOTSUPP;
1579 }
1580
1581 /* message building helper */
1582 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1583 int flags, u8 cmd)
1584 {
1585 /* since there is no private header just add the generic one */
1586 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1587 }
1588
1589 static struct sk_buff *
1590 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1591 u32 portid, u32 seq,
1592 enum nfc_attrs attr,
1593 u32 oui, u32 subcmd, gfp_t gfp)
1594 {
1595 struct sk_buff *skb;
1596 void *hdr;
1597
1598 skb = nlmsg_new(approxlen + 100, gfp);
1599 if (!skb)
1600 return NULL;
1601
1602 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1603 if (!hdr) {
1604 kfree_skb(skb);
1605 return NULL;
1606 }
1607
1608 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1609 goto nla_put_failure;
1610 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1611 goto nla_put_failure;
1612 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1613 goto nla_put_failure;
1614
1615 ((void **)skb->cb)[0] = dev;
1616 ((void **)skb->cb)[1] = hdr;
1617
1618 return skb;
1619
1620 nla_put_failure:
1621 kfree_skb(skb);
1622 return NULL;
1623 }
1624
1625 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1626 enum nfc_attrs attr,
1627 u32 oui, u32 subcmd,
1628 int approxlen)
1629 {
1630 if (WARN_ON(!dev->cur_cmd_info))
1631 return NULL;
1632
1633 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1634 dev->cur_cmd_info->snd_portid,
1635 dev->cur_cmd_info->snd_seq, attr,
1636 oui, subcmd, GFP_KERNEL);
1637 }
1638 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1639
1640 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1641 {
1642 struct nfc_dev *dev = ((void **)skb->cb)[0];
1643 void *hdr = ((void **)skb->cb)[1];
1644
1645 /* clear CB data for netlink core to own from now on */
1646 memset(skb->cb, 0, sizeof(skb->cb));
1647
1648 if (WARN_ON(!dev->cur_cmd_info)) {
1649 kfree_skb(skb);
1650 return -EINVAL;
1651 }
1652
1653 genlmsg_end(skb, hdr);
1654 return genlmsg_reply(skb, dev->cur_cmd_info);
1655 }
1656 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1657
1658 static const struct genl_ops nfc_genl_ops[] = {
1659 {
1660 .cmd = NFC_CMD_GET_DEVICE,
1661 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1662 .doit = nfc_genl_get_device,
1663 .dumpit = nfc_genl_dump_devices,
1664 .done = nfc_genl_dump_devices_done,
1665 },
1666 {
1667 .cmd = NFC_CMD_DEV_UP,
1668 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1669 .doit = nfc_genl_dev_up,
1670 },
1671 {
1672 .cmd = NFC_CMD_DEV_DOWN,
1673 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1674 .doit = nfc_genl_dev_down,
1675 },
1676 {
1677 .cmd = NFC_CMD_START_POLL,
1678 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1679 .doit = nfc_genl_start_poll,
1680 },
1681 {
1682 .cmd = NFC_CMD_STOP_POLL,
1683 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1684 .doit = nfc_genl_stop_poll,
1685 },
1686 {
1687 .cmd = NFC_CMD_DEP_LINK_UP,
1688 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1689 .doit = nfc_genl_dep_link_up,
1690 },
1691 {
1692 .cmd = NFC_CMD_DEP_LINK_DOWN,
1693 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1694 .doit = nfc_genl_dep_link_down,
1695 },
1696 {
1697 .cmd = NFC_CMD_GET_TARGET,
1698 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1699 .dumpit = nfc_genl_dump_targets,
1700 .done = nfc_genl_dump_targets_done,
1701 },
1702 {
1703 .cmd = NFC_CMD_LLC_GET_PARAMS,
1704 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1705 .doit = nfc_genl_llc_get_params,
1706 },
1707 {
1708 .cmd = NFC_CMD_LLC_SET_PARAMS,
1709 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1710 .doit = nfc_genl_llc_set_params,
1711 },
1712 {
1713 .cmd = NFC_CMD_LLC_SDREQ,
1714 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1715 .doit = nfc_genl_llc_sdreq,
1716 },
1717 {
1718 .cmd = NFC_CMD_FW_DOWNLOAD,
1719 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1720 .doit = nfc_genl_fw_download,
1721 },
1722 {
1723 .cmd = NFC_CMD_ENABLE_SE,
1724 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1725 .doit = nfc_genl_enable_se,
1726 },
1727 {
1728 .cmd = NFC_CMD_DISABLE_SE,
1729 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1730 .doit = nfc_genl_disable_se,
1731 },
1732 {
1733 .cmd = NFC_CMD_GET_SE,
1734 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1735 .dumpit = nfc_genl_dump_ses,
1736 .done = nfc_genl_dump_ses_done,
1737 },
1738 {
1739 .cmd = NFC_CMD_SE_IO,
1740 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1741 .doit = nfc_genl_se_io,
1742 },
1743 {
1744 .cmd = NFC_CMD_ACTIVATE_TARGET,
1745 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1746 .doit = nfc_genl_activate_target,
1747 },
1748 {
1749 .cmd = NFC_CMD_VENDOR,
1750 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1751 .doit = nfc_genl_vendor_cmd,
1752 },
1753 {
1754 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1755 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1756 .doit = nfc_genl_deactivate_target,
1757 },
1758 };
1759
1760 static struct genl_family nfc_genl_family __ro_after_init = {
1761 .hdrsize = 0,
1762 .name = NFC_GENL_NAME,
1763 .version = NFC_GENL_VERSION,
1764 .maxattr = NFC_ATTR_MAX,
1765 .policy = nfc_genl_policy,
1766 .module = THIS_MODULE,
1767 .ops = nfc_genl_ops,
1768 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1769 .mcgrps = nfc_genl_mcgrps,
1770 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1771 };
1772
1773
1774 struct urelease_work {
1775 struct work_struct w;
1776 u32 portid;
1777 };
1778
1779 static void nfc_urelease_event_work(struct work_struct *work)
1780 {
1781 struct urelease_work *w = container_of(work, struct urelease_work, w);
1782 struct class_dev_iter iter;
1783 struct nfc_dev *dev;
1784
1785 pr_debug("portid %d\n", w->portid);
1786
1787 mutex_lock(&nfc_devlist_mutex);
1788
1789 nfc_device_iter_init(&iter);
1790 dev = nfc_device_iter_next(&iter);
1791
1792 while (dev) {
1793 mutex_lock(&dev->genl_data.genl_data_mutex);
1794
1795 if (dev->genl_data.poll_req_portid == w->portid) {
1796 nfc_stop_poll(dev);
1797 dev->genl_data.poll_req_portid = 0;
1798 }
1799
1800 mutex_unlock(&dev->genl_data.genl_data_mutex);
1801
1802 dev = nfc_device_iter_next(&iter);
1803 }
1804
1805 nfc_device_iter_exit(&iter);
1806
1807 mutex_unlock(&nfc_devlist_mutex);
1808
1809 kfree(w);
1810 }
1811
1812 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1813 unsigned long event, void *ptr)
1814 {
1815 struct netlink_notify *n = ptr;
1816 struct urelease_work *w;
1817
1818 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1819 goto out;
1820
1821 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1822
1823 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1824 if (w) {
1825 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1826 w->portid = n->portid;
1827 schedule_work((struct work_struct *) w);
1828 }
1829
1830 out:
1831 return NOTIFY_DONE;
1832 }
1833
1834 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1835 {
1836 genl_data->poll_req_portid = 0;
1837 mutex_init(&genl_data->genl_data_mutex);
1838 }
1839
1840 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1841 {
1842 mutex_destroy(&genl_data->genl_data_mutex);
1843 }
1844
1845 static struct notifier_block nl_notifier = {
1846 .notifier_call = nfc_genl_rcv_nl_event,
1847 };
1848
1849 /**
1850 * nfc_genl_init() - Initialize netlink interface
1851 *
1852 * This initialization function registers the nfc netlink family.
1853 */
1854 int __init nfc_genl_init(void)
1855 {
1856 int rc;
1857
1858 rc = genl_register_family(&nfc_genl_family);
1859 if (rc)
1860 return rc;
1861
1862 netlink_register_notifier(&nl_notifier);
1863
1864 return 0;
1865 }
1866
1867 /**
1868 * nfc_genl_exit() - Deinitialize netlink interface
1869 *
1870 * This exit function unregisters the nfc netlink family.
1871 */
1872 void nfc_genl_exit(void)
1873 {
1874 netlink_unregister_notifier(&nl_notifier);
1875 genl_unregister_family(&nfc_genl_family);
1876 }
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