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Linux 5.7.7
[linux/fpc-iii.git] / net / nfc / netlink.c
blobe894254c17d430f7055a7a333e454af6d942a913
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_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
55 static 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
61 static 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
102 nla_put_failure:
103 genlmsg_cancel(msg, hdr);
104 return -EMSGSIZE;
105 }
106
107 static 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
125 static 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
160 static 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
170 int 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
193 nla_put_failure:
194 free_msg:
195 nlmsg_free(msg);
196 return -EMSGSIZE;
197 }
198
199 int 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
223 nla_put_failure:
224 free_msg:
225 nlmsg_free(msg);
226 return -EMSGSIZE;
227 }
228
229 int 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
254 nla_put_failure:
255 free_msg:
256 nlmsg_free(msg);
257 return -EMSGSIZE;
258 }
259
260 int 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
283 nla_put_failure:
284 free_msg:
285 nlmsg_free(msg);
286 return -EMSGSIZE;
287 }
288
289 static 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
300 int 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
323 nla_put_failure:
324 free_msg:
325 nlmsg_free(msg);
326 return -EMSGSIZE;
327 }
328
329 int 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
352 nla_put_failure:
353 free_msg:
354 nlmsg_free(msg);
355 return -EMSGSIZE;
356 }
357
358 int 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
415 nla_put_failure:
416 free_msg:
417 nlmsg_free(msg);
418
419 nfc_llcp_free_sdp_tlv_list(sdres_list);
420
421 return rc;
422 }
423
424 int 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
449 nla_put_failure:
450 free_msg:
451 nlmsg_free(msg);
452 return -EMSGSIZE;
453 }
454
455 int 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
479 nla_put_failure:
480 free_msg:
481 nlmsg_free(msg);
482 return -EMSGSIZE;
483 }
484
485 int 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
523 nla_put_failure:
524 free_msg:
525 /* evt_transaction is no more used */
526 devm_kfree(&dev->dev, evt_transaction);
527 nlmsg_free(msg);
528 return -EMSGSIZE;
529 }
530
531 int 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
561 nla_put_failure:
562 free_msg:
563 nlmsg_free(msg);
564 return -EMSGSIZE;
565 }
566
567 static 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
588 nla_put_failure:
589 genlmsg_cancel(msg, hdr);
590 return -EMSGSIZE;
591 }
592
593 static 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
635 static 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
645 int 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
678 nla_put_failure:
679 free_msg:
680 nlmsg_free(msg);
681 return -EMSGSIZE;
682 }
683
684 int 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
709 nla_put_failure:
710 free_msg:
711 nlmsg_free(msg);
712 return -EMSGSIZE;
713 }
714
715 static 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
746 out_free:
747 nlmsg_free(msg);
748 out_putdev:
749 nfc_put_device(dev);
750 return rc;
751 }
752
753 static 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
774 static 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
795 static 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
836 static 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 return -EINVAL;
856 }
857
858 device_unlock(&dev->dev);
859
860 mutex_lock(&dev->genl_data.genl_data_mutex);
861
862 if (dev->genl_data.poll_req_portid != info->snd_portid) {
863 rc = -EBUSY;
864 goto out;
865 }
866
867 rc = nfc_stop_poll(dev);
868 dev->genl_data.poll_req_portid = 0;
869
870 out:
871 mutex_unlock(&dev->genl_data.genl_data_mutex);
872 nfc_put_device(dev);
873 return rc;
874 }
875
876 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
877 {
878 struct nfc_dev *dev;
879 u32 device_idx, target_idx, protocol;
880 int rc;
881
882 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
883 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
884 !info->attrs[NFC_ATTR_PROTOCOLS])
885 return -EINVAL;
886
887 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
888
889 dev = nfc_get_device(device_idx);
890 if (!dev)
891 return -ENODEV;
892
893 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
894 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
895
896 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
897 rc = nfc_activate_target(dev, target_idx, protocol);
898
899 nfc_put_device(dev);
900 return rc;
901 }
902
903 static int nfc_genl_deactivate_target(struct sk_buff *skb,
904 struct genl_info *info)
905 {
906 struct nfc_dev *dev;
907 u32 device_idx, target_idx;
908 int rc;
909
910 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
911 !info->attrs[NFC_ATTR_TARGET_INDEX])
912 return -EINVAL;
913
914 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
915
916 dev = nfc_get_device(device_idx);
917 if (!dev)
918 return -ENODEV;
919
920 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
921
922 rc = nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
923
924 nfc_put_device(dev);
925 return rc;
926 }
927
928 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
929 {
930 struct nfc_dev *dev;
931 int rc, tgt_idx;
932 u32 idx;
933 u8 comm;
934
935 pr_debug("DEP link up\n");
936
937 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
938 !info->attrs[NFC_ATTR_COMM_MODE])
939 return -EINVAL;
940
941 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
942 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
943 tgt_idx = NFC_TARGET_IDX_ANY;
944 else
945 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
946
947 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
948
949 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
950 return -EINVAL;
951
952 dev = nfc_get_device(idx);
953 if (!dev)
954 return -ENODEV;
955
956 rc = nfc_dep_link_up(dev, tgt_idx, comm);
957
958 nfc_put_device(dev);
959
960 return rc;
961 }
962
963 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
964 {
965 struct nfc_dev *dev;
966 int rc;
967 u32 idx;
968
969 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
970 !info->attrs[NFC_ATTR_TARGET_INDEX])
971 return -EINVAL;
972
973 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
974
975 dev = nfc_get_device(idx);
976 if (!dev)
977 return -ENODEV;
978
979 rc = nfc_dep_link_down(dev);
980
981 nfc_put_device(dev);
982 return rc;
983 }
984
985 static int nfc_genl_send_params(struct sk_buff *msg,
986 struct nfc_llcp_local *local,
987 u32 portid, u32 seq)
988 {
989 void *hdr;
990
991 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
992 NFC_CMD_LLC_GET_PARAMS);
993 if (!hdr)
994 return -EMSGSIZE;
995
996 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
997 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
998 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
999 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1000 goto nla_put_failure;
1001
1002 genlmsg_end(msg, hdr);
1003 return 0;
1004
1005 nla_put_failure:
1006 genlmsg_cancel(msg, hdr);
1007 return -EMSGSIZE;
1008 }
1009
1010 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1011 {
1012 struct nfc_dev *dev;
1013 struct nfc_llcp_local *local;
1014 int rc = 0;
1015 struct sk_buff *msg = NULL;
1016 u32 idx;
1017
1018 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1019 !info->attrs[NFC_ATTR_FIRMWARE_NAME])
1020 return -EINVAL;
1021
1022 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1023
1024 dev = nfc_get_device(idx);
1025 if (!dev)
1026 return -ENODEV;
1027
1028 device_lock(&dev->dev);
1029
1030 local = nfc_llcp_find_local(dev);
1031 if (!local) {
1032 rc = -ENODEV;
1033 goto exit;
1034 }
1035
1036 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1037 if (!msg) {
1038 rc = -ENOMEM;
1039 goto exit;
1040 }
1041
1042 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1043
1044 exit:
1045 device_unlock(&dev->dev);
1046
1047 nfc_put_device(dev);
1048
1049 if (rc < 0) {
1050 if (msg)
1051 nlmsg_free(msg);
1052
1053 return rc;
1054 }
1055
1056 return genlmsg_reply(msg, info);
1057 }
1058
1059 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1060 {
1061 struct nfc_dev *dev;
1062 struct nfc_llcp_local *local;
1063 u8 rw = 0;
1064 u16 miux = 0;
1065 u32 idx;
1066 int rc = 0;
1067
1068 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1069 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1070 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1071 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1072 return -EINVAL;
1073
1074 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1075 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1076
1077 if (rw > LLCP_MAX_RW)
1078 return -EINVAL;
1079 }
1080
1081 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1082 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1083
1084 if (miux > LLCP_MAX_MIUX)
1085 return -EINVAL;
1086 }
1087
1088 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1089
1090 dev = nfc_get_device(idx);
1091 if (!dev)
1092 return -ENODEV;
1093
1094 device_lock(&dev->dev);
1095
1096 local = nfc_llcp_find_local(dev);
1097 if (!local) {
1098 rc = -ENODEV;
1099 goto exit;
1100 }
1101
1102 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1103 if (dev->dep_link_up) {
1104 rc = -EINPROGRESS;
1105 goto exit;
1106 }
1107
1108 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1109 }
1110
1111 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1112 local->rw = rw;
1113
1114 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1115 local->miux = cpu_to_be16(miux);
1116
1117 exit:
1118 device_unlock(&dev->dev);
1119
1120 nfc_put_device(dev);
1121
1122 return rc;
1123 }
1124
1125 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1126 {
1127 struct nfc_dev *dev;
1128 struct nfc_llcp_local *local;
1129 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1130 u32 idx;
1131 u8 tid;
1132 char *uri;
1133 int rc = 0, rem;
1134 size_t uri_len, tlvs_len;
1135 struct hlist_head sdreq_list;
1136 struct nfc_llcp_sdp_tlv *sdreq;
1137
1138 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1139 !info->attrs[NFC_ATTR_LLC_SDP])
1140 return -EINVAL;
1141
1142 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1143
1144 dev = nfc_get_device(idx);
1145 if (!dev)
1146 return -ENODEV;
1147
1148 device_lock(&dev->dev);
1149
1150 if (dev->dep_link_up == false) {
1151 rc = -ENOLINK;
1152 goto exit;
1153 }
1154
1155 local = nfc_llcp_find_local(dev);
1156 if (!local) {
1157 rc = -ENODEV;
1158 goto exit;
1159 }
1160
1161 INIT_HLIST_HEAD(&sdreq_list);
1162
1163 tlvs_len = 0;
1164
1165 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1166 rc = nla_parse_nested_deprecated(sdp_attrs, NFC_SDP_ATTR_MAX,
1167 attr, nfc_sdp_genl_policy,
1168 info->extack);
1169
1170 if (rc != 0) {
1171 rc = -EINVAL;
1172 goto exit;
1173 }
1174
1175 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1176 continue;
1177
1178 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1179 if (uri_len == 0)
1180 continue;
1181
1182 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri == NULL || *uri == 0)
1184 continue;
1185
1186 tid = local->sdreq_next_tid++;
1187
1188 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1189 if (sdreq == NULL) {
1190 rc = -ENOMEM;
1191 goto exit;
1192 }
1193
1194 tlvs_len += sdreq->tlv_len;
1195
1196 hlist_add_head(&sdreq->node, &sdreq_list);
1197 }
1198
1199 if (hlist_empty(&sdreq_list)) {
1200 rc = -EINVAL;
1201 goto exit;
1202 }
1203
1204 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1205 exit:
1206 device_unlock(&dev->dev);
1207
1208 nfc_put_device(dev);
1209
1210 return rc;
1211 }
1212
1213 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1214 {
1215 struct nfc_dev *dev;
1216 int rc;
1217 u32 idx;
1218 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1219
1220 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1221 return -EINVAL;
1222
1223 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1224
1225 dev = nfc_get_device(idx);
1226 if (!dev)
1227 return -ENODEV;
1228
1229 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1230 sizeof(firmware_name));
1231
1232 rc = nfc_fw_download(dev, firmware_name);
1233
1234 nfc_put_device(dev);
1235 return rc;
1236 }
1237
1238 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1239 u32 result)
1240 {
1241 struct sk_buff *msg;
1242 void *hdr;
1243
1244 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1245 if (!msg)
1246 return -ENOMEM;
1247
1248 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1249 NFC_CMD_FW_DOWNLOAD);
1250 if (!hdr)
1251 goto free_msg;
1252
1253 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1254 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1255 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1256 goto nla_put_failure;
1257
1258 genlmsg_end(msg, hdr);
1259
1260 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1261
1262 return 0;
1263
1264 nla_put_failure:
1265 free_msg:
1266 nlmsg_free(msg);
1267 return -EMSGSIZE;
1268 }
1269
1270 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1271 {
1272 struct nfc_dev *dev;
1273 int rc;
1274 u32 idx, se_idx;
1275
1276 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1277 !info->attrs[NFC_ATTR_SE_INDEX])
1278 return -EINVAL;
1279
1280 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1281 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1282
1283 dev = nfc_get_device(idx);
1284 if (!dev)
1285 return -ENODEV;
1286
1287 rc = nfc_enable_se(dev, se_idx);
1288
1289 nfc_put_device(dev);
1290 return rc;
1291 }
1292
1293 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1294 {
1295 struct nfc_dev *dev;
1296 int rc;
1297 u32 idx, se_idx;
1298
1299 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1300 !info->attrs[NFC_ATTR_SE_INDEX])
1301 return -EINVAL;
1302
1303 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1304 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1305
1306 dev = nfc_get_device(idx);
1307 if (!dev)
1308 return -ENODEV;
1309
1310 rc = nfc_disable_se(dev, se_idx);
1311
1312 nfc_put_device(dev);
1313 return rc;
1314 }
1315
1316 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1317 u32 portid, u32 seq,
1318 struct netlink_callback *cb,
1319 int flags)
1320 {
1321 void *hdr;
1322 struct nfc_se *se, *n;
1323
1324 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1325 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1326 NFC_CMD_GET_SE);
1327 if (!hdr)
1328 goto nla_put_failure;
1329
1330 if (cb)
1331 genl_dump_check_consistent(cb, hdr);
1332
1333 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1334 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1335 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1336 goto nla_put_failure;
1337
1338 genlmsg_end(msg, hdr);
1339 }
1340
1341 return 0;
1342
1343 nla_put_failure:
1344 genlmsg_cancel(msg, hdr);
1345 return -EMSGSIZE;
1346 }
1347
1348 static int nfc_genl_dump_ses(struct sk_buff *skb,
1349 struct netlink_callback *cb)
1350 {
1351 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1352 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1353 bool first_call = false;
1354
1355 if (!iter) {
1356 first_call = true;
1357 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1358 if (!iter)
1359 return -ENOMEM;
1360 cb->args[0] = (long) iter;
1361 }
1362
1363 mutex_lock(&nfc_devlist_mutex);
1364
1365 cb->seq = nfc_devlist_generation;
1366
1367 if (first_call) {
1368 nfc_device_iter_init(iter);
1369 dev = nfc_device_iter_next(iter);
1370 }
1371
1372 while (dev) {
1373 int rc;
1374
1375 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1376 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1377 if (rc < 0)
1378 break;
1379
1380 dev = nfc_device_iter_next(iter);
1381 }
1382
1383 mutex_unlock(&nfc_devlist_mutex);
1384
1385 cb->args[1] = (long) dev;
1386
1387 return skb->len;
1388 }
1389
1390 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1391 {
1392 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1393
1394 nfc_device_iter_exit(iter);
1395 kfree(iter);
1396
1397 return 0;
1398 }
1399
1400 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1401 u8 *apdu, size_t apdu_length,
1402 se_io_cb_t cb, void *cb_context)
1403 {
1404 struct nfc_se *se;
1405 int rc;
1406
1407 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1408
1409 device_lock(&dev->dev);
1410
1411 if (!device_is_registered(&dev->dev)) {
1412 rc = -ENODEV;
1413 goto error;
1414 }
1415
1416 if (!dev->dev_up) {
1417 rc = -ENODEV;
1418 goto error;
1419 }
1420
1421 if (!dev->ops->se_io) {
1422 rc = -EOPNOTSUPP;
1423 goto error;
1424 }
1425
1426 se = nfc_find_se(dev, se_idx);
1427 if (!se) {
1428 rc = -EINVAL;
1429 goto error;
1430 }
1431
1432 if (se->state != NFC_SE_ENABLED) {
1433 rc = -ENODEV;
1434 goto error;
1435 }
1436
1437 rc = dev->ops->se_io(dev, se_idx, apdu,
1438 apdu_length, cb, cb_context);
1439
1440 error:
1441 device_unlock(&dev->dev);
1442 return rc;
1443 }
1444
1445 struct se_io_ctx {
1446 u32 dev_idx;
1447 u32 se_idx;
1448 };
1449
1450 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1451 {
1452 struct se_io_ctx *ctx = context;
1453 struct sk_buff *msg;
1454 void *hdr;
1455
1456 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1457 if (!msg) {
1458 kfree(ctx);
1459 return;
1460 }
1461
1462 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1463 NFC_CMD_SE_IO);
1464 if (!hdr)
1465 goto free_msg;
1466
1467 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1468 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1469 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1470 goto nla_put_failure;
1471
1472 genlmsg_end(msg, hdr);
1473
1474 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1475
1476 kfree(ctx);
1477
1478 return;
1479
1480 nla_put_failure:
1481 free_msg:
1482 nlmsg_free(msg);
1483 kfree(ctx);
1484
1485 return;
1486 }
1487
1488 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1489 {
1490 struct nfc_dev *dev;
1491 struct se_io_ctx *ctx;
1492 u32 dev_idx, se_idx;
1493 u8 *apdu;
1494 size_t apdu_len;
1495
1496 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1497 !info->attrs[NFC_ATTR_SE_INDEX] ||
1498 !info->attrs[NFC_ATTR_SE_APDU])
1499 return -EINVAL;
1500
1501 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1502 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1503
1504 dev = nfc_get_device(dev_idx);
1505 if (!dev)
1506 return -ENODEV;
1507
1508 if (!dev->ops || !dev->ops->se_io)
1509 return -ENOTSUPP;
1510
1511 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1512 if (apdu_len == 0)
1513 return -EINVAL;
1514
1515 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1516 if (!apdu)
1517 return -EINVAL;
1518
1519 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1520 if (!ctx)
1521 return -ENOMEM;
1522
1523 ctx->dev_idx = dev_idx;
1524 ctx->se_idx = se_idx;
1525
1526 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1527 }
1528
1529 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1530 struct genl_info *info)
1531 {
1532 struct nfc_dev *dev;
1533 struct nfc_vendor_cmd *cmd;
1534 u32 dev_idx, vid, subcmd;
1535 u8 *data;
1536 size_t data_len;
1537 int i, err;
1538
1539 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1540 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1541 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1542 return -EINVAL;
1543
1544 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1545 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1546 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1547
1548 dev = nfc_get_device(dev_idx);
1549 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1550 return -ENODEV;
1551
1552 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1553 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1554 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1555 if (data_len == 0)
1556 return -EINVAL;
1557 } else {
1558 data = NULL;
1559 data_len = 0;
1560 }
1561
1562 for (i = 0; i < dev->n_vendor_cmds; i++) {
1563 cmd = &dev->vendor_cmds[i];
1564
1565 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1566 continue;
1567
1568 dev->cur_cmd_info = info;
1569 err = cmd->doit(dev, data, data_len);
1570 dev->cur_cmd_info = NULL;
1571 return err;
1572 }
1573
1574 return -EOPNOTSUPP;
1575 }
1576
1577 /* message building helper */
1578 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1579 int flags, u8 cmd)
1580 {
1581 /* since there is no private header just add the generic one */
1582 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1583 }
1584
1585 static struct sk_buff *
1586 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1587 u32 portid, u32 seq,
1588 enum nfc_attrs attr,
1589 u32 oui, u32 subcmd, gfp_t gfp)
1590 {
1591 struct sk_buff *skb;
1592 void *hdr;
1593
1594 skb = nlmsg_new(approxlen + 100, gfp);
1595 if (!skb)
1596 return NULL;
1597
1598 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1599 if (!hdr) {
1600 kfree_skb(skb);
1601 return NULL;
1602 }
1603
1604 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1605 goto nla_put_failure;
1606 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1607 goto nla_put_failure;
1608 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1609 goto nla_put_failure;
1610
1611 ((void **)skb->cb)[0] = dev;
1612 ((void **)skb->cb)[1] = hdr;
1613
1614 return skb;
1615
1616 nla_put_failure:
1617 kfree_skb(skb);
1618 return NULL;
1619 }
1620
1621 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1622 enum nfc_attrs attr,
1623 u32 oui, u32 subcmd,
1624 int approxlen)
1625 {
1626 if (WARN_ON(!dev->cur_cmd_info))
1627 return NULL;
1628
1629 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1630 dev->cur_cmd_info->snd_portid,
1631 dev->cur_cmd_info->snd_seq, attr,
1632 oui, subcmd, GFP_KERNEL);
1633 }
1634 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1635
1636 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1637 {
1638 struct nfc_dev *dev = ((void **)skb->cb)[0];
1639 void *hdr = ((void **)skb->cb)[1];
1640
1641 /* clear CB data for netlink core to own from now on */
1642 memset(skb->cb, 0, sizeof(skb->cb));
1643
1644 if (WARN_ON(!dev->cur_cmd_info)) {
1645 kfree_skb(skb);
1646 return -EINVAL;
1647 }
1648
1649 genlmsg_end(skb, hdr);
1650 return genlmsg_reply(skb, dev->cur_cmd_info);
1651 }
1652 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1653
1654 static const struct genl_ops nfc_genl_ops[] = {
1655 {
1656 .cmd = NFC_CMD_GET_DEVICE,
1657 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1658 .doit = nfc_genl_get_device,
1659 .dumpit = nfc_genl_dump_devices,
1660 .done = nfc_genl_dump_devices_done,
1661 },
1662 {
1663 .cmd = NFC_CMD_DEV_UP,
1664 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1665 .doit = nfc_genl_dev_up,
1666 },
1667 {
1668 .cmd = NFC_CMD_DEV_DOWN,
1669 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1670 .doit = nfc_genl_dev_down,
1671 },
1672 {
1673 .cmd = NFC_CMD_START_POLL,
1674 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1675 .doit = nfc_genl_start_poll,
1676 },
1677 {
1678 .cmd = NFC_CMD_STOP_POLL,
1679 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1680 .doit = nfc_genl_stop_poll,
1681 },
1682 {
1683 .cmd = NFC_CMD_DEP_LINK_UP,
1684 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1685 .doit = nfc_genl_dep_link_up,
1686 },
1687 {
1688 .cmd = NFC_CMD_DEP_LINK_DOWN,
1689 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1690 .doit = nfc_genl_dep_link_down,
1691 },
1692 {
1693 .cmd = NFC_CMD_GET_TARGET,
1694 .validate = GENL_DONT_VALIDATE_STRICT |
1695 GENL_DONT_VALIDATE_DUMP_STRICT,
1696 .dumpit = nfc_genl_dump_targets,
1697 .done = nfc_genl_dump_targets_done,
1698 },
1699 {
1700 .cmd = NFC_CMD_LLC_GET_PARAMS,
1701 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1702 .doit = nfc_genl_llc_get_params,
1703 },
1704 {
1705 .cmd = NFC_CMD_LLC_SET_PARAMS,
1706 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1707 .doit = nfc_genl_llc_set_params,
1708 },
1709 {
1710 .cmd = NFC_CMD_LLC_SDREQ,
1711 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1712 .doit = nfc_genl_llc_sdreq,
1713 },
1714 {
1715 .cmd = NFC_CMD_FW_DOWNLOAD,
1716 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1717 .doit = nfc_genl_fw_download,
1718 },
1719 {
1720 .cmd = NFC_CMD_ENABLE_SE,
1721 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1722 .doit = nfc_genl_enable_se,
1723 },
1724 {
1725 .cmd = NFC_CMD_DISABLE_SE,
1726 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1727 .doit = nfc_genl_disable_se,
1728 },
1729 {
1730 .cmd = NFC_CMD_GET_SE,
1731 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1732 .dumpit = nfc_genl_dump_ses,
1733 .done = nfc_genl_dump_ses_done,
1734 },
1735 {
1736 .cmd = NFC_CMD_SE_IO,
1737 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1738 .doit = nfc_genl_se_io,
1739 },
1740 {
1741 .cmd = NFC_CMD_ACTIVATE_TARGET,
1742 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1743 .doit = nfc_genl_activate_target,
1744 },
1745 {
1746 .cmd = NFC_CMD_VENDOR,
1747 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1748 .doit = nfc_genl_vendor_cmd,
1749 },
1750 {
1751 .cmd = NFC_CMD_DEACTIVATE_TARGET,
1752 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1753 .doit = nfc_genl_deactivate_target,
1754 },
1755 };
1756
1757 static struct genl_family nfc_genl_family __ro_after_init = {
1758 .hdrsize = 0,
1759 .name = NFC_GENL_NAME,
1760 .version = NFC_GENL_VERSION,
1761 .maxattr = NFC_ATTR_MAX,
1762 .policy = nfc_genl_policy,
1763 .module = THIS_MODULE,
1764 .ops = nfc_genl_ops,
1765 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1766 .mcgrps = nfc_genl_mcgrps,
1767 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1768 };
1769
1770
1771 struct urelease_work {
1772 struct work_struct w;
1773 u32 portid;
1774 };
1775
1776 static void nfc_urelease_event_work(struct work_struct *work)
1777 {
1778 struct urelease_work *w = container_of(work, struct urelease_work, w);
1779 struct class_dev_iter iter;
1780 struct nfc_dev *dev;
1781
1782 pr_debug("portid %d\n", w->portid);
1783
1784 mutex_lock(&nfc_devlist_mutex);
1785
1786 nfc_device_iter_init(&iter);
1787 dev = nfc_device_iter_next(&iter);
1788
1789 while (dev) {
1790 mutex_lock(&dev->genl_data.genl_data_mutex);
1791
1792 if (dev->genl_data.poll_req_portid == w->portid) {
1793 nfc_stop_poll(dev);
1794 dev->genl_data.poll_req_portid = 0;
1795 }
1796
1797 mutex_unlock(&dev->genl_data.genl_data_mutex);
1798
1799 dev = nfc_device_iter_next(&iter);
1800 }
1801
1802 nfc_device_iter_exit(&iter);
1803
1804 mutex_unlock(&nfc_devlist_mutex);
1805
1806 kfree(w);
1807 }
1808
1809 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1810 unsigned long event, void *ptr)
1811 {
1812 struct netlink_notify *n = ptr;
1813 struct urelease_work *w;
1814
1815 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1816 goto out;
1817
1818 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1819
1820 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1821 if (w) {
1822 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1823 w->portid = n->portid;
1824 schedule_work((struct work_struct *) w);
1825 }
1826
1827 out:
1828 return NOTIFY_DONE;
1829 }
1830
1831 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1832 {
1833 genl_data->poll_req_portid = 0;
1834 mutex_init(&genl_data->genl_data_mutex);
1835 }
1836
1837 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1838 {
1839 mutex_destroy(&genl_data->genl_data_mutex);
1840 }
1841
1842 static struct notifier_block nl_notifier = {
1843 .notifier_call = nfc_genl_rcv_nl_event,
1844 };
1845
1846 /**
1847 * nfc_genl_init() - Initialize netlink interface
1848 *
1849 * This initialization function registers the nfc netlink family.
1850 */
1851 int __init nfc_genl_init(void)
1852 {
1853 int rc;
1854
1855 rc = genl_register_family(&nfc_genl_family);
1856 if (rc)
1857 return rc;
1858
1859 netlink_register_notifier(&nl_notifier);
1860
1861 return 0;
1862 }
1863
1864 /**
1865 * nfc_genl_exit() - Deinitialize netlink interface
1866 *
1867 * This exit function unregisters the nfc netlink family.
1868 */
1869 void nfc_genl_exit(void)
1870 {
1871 netlink_unregister_notifier(&nl_notifier);
1872 genl_unregister_family(&nfc_genl_family);
1873 }
Linux with added FPC-III support