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Merge tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / net / nfc / netlink.c
1 /*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * Vendor commands implementation based on net/wireless/nl80211.c
9 * which is:
10 *
11 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
12 * Copyright 2013-2014 Intel Mobile Communications GmbH
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 */
27
28 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
29
30 #include <net/genetlink.h>
31 #include <linux/nfc.h>
32 #include <linux/slab.h>
33
34 #include "nfc.h"
35 #include "llcp.h"
36
37 static const struct genl_multicast_group nfc_genl_mcgrps[] = {
38 { .name = NFC_GENL_MCAST_EVENT_NAME, },
39 };
40
41 static struct genl_family nfc_genl_family;
42 static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
43 [NFC_ATTR_DEVICE_INDEX] = { .type = NLA_U32 },
44 [NFC_ATTR_DEVICE_NAME] = { .type = NLA_STRING,
45 .len = NFC_DEVICE_NAME_MAXSIZE },
46 [NFC_ATTR_PROTOCOLS] = { .type = NLA_U32 },
47 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
48 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
49 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
50 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
51 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
52 [NFC_ATTR_LLC_PARAM_LTO] = { .type = NLA_U8 },
53 [NFC_ATTR_LLC_PARAM_RW] = { .type = NLA_U8 },
54 [NFC_ATTR_LLC_PARAM_MIUX] = { .type = NLA_U16 },
55 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
56 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
57 .len = NFC_FIRMWARE_NAME_MAXSIZE },
58 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
59 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
60
61 };
62
63 static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
64 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
65 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
66 };
67
68 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
69 struct netlink_callback *cb, int flags)
70 {
71 void *hdr;
72
73 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
74 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
75 if (!hdr)
76 return -EMSGSIZE;
77
78 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
79
80 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
81 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
82 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
83 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
84 goto nla_put_failure;
85 if (target->nfcid1_len > 0 &&
86 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
87 target->nfcid1))
88 goto nla_put_failure;
89 if (target->sensb_res_len > 0 &&
90 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
91 target->sensb_res))
92 goto nla_put_failure;
93 if (target->sensf_res_len > 0 &&
94 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
95 target->sensf_res))
96 goto nla_put_failure;
97
98 if (target->is_iso15693) {
99 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
100 target->iso15693_dsfid) ||
101 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
102 sizeof(target->iso15693_uid), target->iso15693_uid))
103 goto nla_put_failure;
104 }
105
106 genlmsg_end(msg, hdr);
107 return 0;
108
109 nla_put_failure:
110 genlmsg_cancel(msg, hdr);
111 return -EMSGSIZE;
112 }
113
114 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
115 {
116 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
117 struct nfc_dev *dev;
118 int rc;
119 u32 idx;
120
121 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
122 attrbuf, nfc_genl_family.maxattr, nfc_genl_policy,
123 NULL);
124 if (rc < 0)
125 return ERR_PTR(rc);
126
127 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
128 return ERR_PTR(-EINVAL);
129
130 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
131
132 dev = nfc_get_device(idx);
133 if (!dev)
134 return ERR_PTR(-ENODEV);
135
136 return dev;
137 }
138
139 static int nfc_genl_dump_targets(struct sk_buff *skb,
140 struct netlink_callback *cb)
141 {
142 int i = cb->args[0];
143 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
144 int rc;
145
146 if (!dev) {
147 dev = __get_device_from_cb(cb);
148 if (IS_ERR(dev))
149 return PTR_ERR(dev);
150
151 cb->args[1] = (long) dev;
152 }
153
154 device_lock(&dev->dev);
155
156 cb->seq = dev->targets_generation;
157
158 while (i < dev->n_targets) {
159 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
160 NLM_F_MULTI);
161 if (rc < 0)
162 break;
163
164 i++;
165 }
166
167 device_unlock(&dev->dev);
168
169 cb->args[0] = i;
170
171 return skb->len;
172 }
173
174 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
175 {
176 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
177
178 if (dev)
179 nfc_put_device(dev);
180
181 return 0;
182 }
183
184 int nfc_genl_targets_found(struct nfc_dev *dev)
185 {
186 struct sk_buff *msg;
187 void *hdr;
188
189 dev->genl_data.poll_req_portid = 0;
190
191 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
192 if (!msg)
193 return -ENOMEM;
194
195 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
196 NFC_EVENT_TARGETS_FOUND);
197 if (!hdr)
198 goto free_msg;
199
200 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
201 goto nla_put_failure;
202
203 genlmsg_end(msg, hdr);
204
205 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
206
207 nla_put_failure:
208 genlmsg_cancel(msg, hdr);
209 free_msg:
210 nlmsg_free(msg);
211 return -EMSGSIZE;
212 }
213
214 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
215 {
216 struct sk_buff *msg;
217 void *hdr;
218
219 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
220 if (!msg)
221 return -ENOMEM;
222
223 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
224 NFC_EVENT_TARGET_LOST);
225 if (!hdr)
226 goto free_msg;
227
228 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
229 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
230 goto nla_put_failure;
231
232 genlmsg_end(msg, hdr);
233
234 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
235
236 return 0;
237
238 nla_put_failure:
239 genlmsg_cancel(msg, hdr);
240 free_msg:
241 nlmsg_free(msg);
242 return -EMSGSIZE;
243 }
244
245 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
246 {
247 struct sk_buff *msg;
248 void *hdr;
249
250 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
251 if (!msg)
252 return -ENOMEM;
253
254 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
255 NFC_EVENT_TM_ACTIVATED);
256 if (!hdr)
257 goto free_msg;
258
259 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
260 goto nla_put_failure;
261 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
262 goto nla_put_failure;
263
264 genlmsg_end(msg, hdr);
265
266 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
267
268 return 0;
269
270 nla_put_failure:
271 genlmsg_cancel(msg, hdr);
272 free_msg:
273 nlmsg_free(msg);
274 return -EMSGSIZE;
275 }
276
277 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
278 {
279 struct sk_buff *msg;
280 void *hdr;
281
282 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
283 if (!msg)
284 return -ENOMEM;
285
286 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
287 NFC_EVENT_TM_DEACTIVATED);
288 if (!hdr)
289 goto free_msg;
290
291 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
292 goto nla_put_failure;
293
294 genlmsg_end(msg, hdr);
295
296 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
297
298 return 0;
299
300 nla_put_failure:
301 genlmsg_cancel(msg, hdr);
302 free_msg:
303 nlmsg_free(msg);
304 return -EMSGSIZE;
305 }
306
307 static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
308 {
309 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
310 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
311 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
312 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
313 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
314 return -1;
315 return 0;
316 }
317
318 int nfc_genl_device_added(struct nfc_dev *dev)
319 {
320 struct sk_buff *msg;
321 void *hdr;
322
323 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
324 if (!msg)
325 return -ENOMEM;
326
327 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
328 NFC_EVENT_DEVICE_ADDED);
329 if (!hdr)
330 goto free_msg;
331
332 if (nfc_genl_setup_device_added(dev, msg))
333 goto nla_put_failure;
334
335 genlmsg_end(msg, hdr);
336
337 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
338
339 return 0;
340
341 nla_put_failure:
342 genlmsg_cancel(msg, hdr);
343 free_msg:
344 nlmsg_free(msg);
345 return -EMSGSIZE;
346 }
347
348 int nfc_genl_device_removed(struct nfc_dev *dev)
349 {
350 struct sk_buff *msg;
351 void *hdr;
352
353 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
354 if (!msg)
355 return -ENOMEM;
356
357 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
358 NFC_EVENT_DEVICE_REMOVED);
359 if (!hdr)
360 goto free_msg;
361
362 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
363 goto nla_put_failure;
364
365 genlmsg_end(msg, hdr);
366
367 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
368
369 return 0;
370
371 nla_put_failure:
372 genlmsg_cancel(msg, hdr);
373 free_msg:
374 nlmsg_free(msg);
375 return -EMSGSIZE;
376 }
377
378 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
379 {
380 struct sk_buff *msg;
381 struct nlattr *sdp_attr, *uri_attr;
382 struct nfc_llcp_sdp_tlv *sdres;
383 struct hlist_node *n;
384 void *hdr;
385 int rc = -EMSGSIZE;
386 int i;
387
388 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
389 if (!msg)
390 return -ENOMEM;
391
392 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
393 NFC_EVENT_LLC_SDRES);
394 if (!hdr)
395 goto free_msg;
396
397 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
398 goto nla_put_failure;
399
400 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
401 if (sdp_attr == NULL) {
402 rc = -ENOMEM;
403 goto nla_put_failure;
404 }
405
406 i = 1;
407 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
408 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
409
410 uri_attr = nla_nest_start(msg, i++);
411 if (uri_attr == NULL) {
412 rc = -ENOMEM;
413 goto nla_put_failure;
414 }
415
416 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
417 goto nla_put_failure;
418
419 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
420 goto nla_put_failure;
421
422 nla_nest_end(msg, uri_attr);
423
424 hlist_del(&sdres->node);
425
426 nfc_llcp_free_sdp_tlv(sdres);
427 }
428
429 nla_nest_end(msg, sdp_attr);
430
431 genlmsg_end(msg, hdr);
432
433 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
434
435 nla_put_failure:
436 genlmsg_cancel(msg, hdr);
437
438 free_msg:
439 nlmsg_free(msg);
440
441 nfc_llcp_free_sdp_tlv_list(sdres_list);
442
443 return rc;
444 }
445
446 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
447 {
448 struct sk_buff *msg;
449 void *hdr;
450
451 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
452 if (!msg)
453 return -ENOMEM;
454
455 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
456 NFC_EVENT_SE_ADDED);
457 if (!hdr)
458 goto free_msg;
459
460 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
461 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
462 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
463 goto nla_put_failure;
464
465 genlmsg_end(msg, hdr);
466
467 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
468
469 return 0;
470
471 nla_put_failure:
472 genlmsg_cancel(msg, hdr);
473 free_msg:
474 nlmsg_free(msg);
475 return -EMSGSIZE;
476 }
477
478 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
479 {
480 struct sk_buff *msg;
481 void *hdr;
482
483 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
484 if (!msg)
485 return -ENOMEM;
486
487 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
488 NFC_EVENT_SE_REMOVED);
489 if (!hdr)
490 goto free_msg;
491
492 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
493 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
494 goto nla_put_failure;
495
496 genlmsg_end(msg, hdr);
497
498 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
499
500 return 0;
501
502 nla_put_failure:
503 genlmsg_cancel(msg, hdr);
504 free_msg:
505 nlmsg_free(msg);
506 return -EMSGSIZE;
507 }
508
509 int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
510 struct nfc_evt_transaction *evt_transaction)
511 {
512 struct nfc_se *se;
513 struct sk_buff *msg;
514 void *hdr;
515
516 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
517 if (!msg)
518 return -ENOMEM;
519
520 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
521 NFC_EVENT_SE_TRANSACTION);
522 if (!hdr)
523 goto free_msg;
524
525 se = nfc_find_se(dev, se_idx);
526 if (!se)
527 goto free_msg;
528
529 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
530 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
531 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
532 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
533 evt_transaction->aid) ||
534 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
535 evt_transaction->params))
536 goto nla_put_failure;
537
538 /* evt_transaction is no more used */
539 devm_kfree(&dev->dev, evt_transaction);
540
541 genlmsg_end(msg, hdr);
542
543 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
544
545 return 0;
546
547 nla_put_failure:
548 genlmsg_cancel(msg, hdr);
549 free_msg:
550 /* evt_transaction is no more used */
551 devm_kfree(&dev->dev, evt_transaction);
552 nlmsg_free(msg);
553 return -EMSGSIZE;
554 }
555
556 int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
557 {
558 struct nfc_se *se;
559 struct sk_buff *msg;
560 void *hdr;
561
562 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
563 if (!msg)
564 return -ENOMEM;
565
566 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
567 NFC_EVENT_SE_CONNECTIVITY);
568 if (!hdr)
569 goto free_msg;
570
571 se = nfc_find_se(dev, se_idx);
572 if (!se)
573 goto free_msg;
574
575 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
576 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
577 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
578 goto nla_put_failure;
579
580 genlmsg_end(msg, hdr);
581
582 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
583
584 return 0;
585
586 nla_put_failure:
587 genlmsg_cancel(msg, hdr);
588 free_msg:
589 nlmsg_free(msg);
590 return -EMSGSIZE;
591 }
592
593 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
594 u32 portid, u32 seq,
595 struct netlink_callback *cb,
596 int flags)
597 {
598 void *hdr;
599
600 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
601 NFC_CMD_GET_DEVICE);
602 if (!hdr)
603 return -EMSGSIZE;
604
605 if (cb)
606 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
607
608 if (nfc_genl_setup_device_added(dev, msg))
609 goto nla_put_failure;
610
611 genlmsg_end(msg, hdr);
612 return 0;
613
614 nla_put_failure:
615 genlmsg_cancel(msg, hdr);
616 return -EMSGSIZE;
617 }
618
619 static int nfc_genl_dump_devices(struct sk_buff *skb,
620 struct netlink_callback *cb)
621 {
622 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
623 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
624 bool first_call = false;
625
626 if (!iter) {
627 first_call = true;
628 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
629 if (!iter)
630 return -ENOMEM;
631 cb->args[0] = (long) iter;
632 }
633
634 mutex_lock(&nfc_devlist_mutex);
635
636 cb->seq = nfc_devlist_generation;
637
638 if (first_call) {
639 nfc_device_iter_init(iter);
640 dev = nfc_device_iter_next(iter);
641 }
642
643 while (dev) {
644 int rc;
645
646 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
647 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
648 if (rc < 0)
649 break;
650
651 dev = nfc_device_iter_next(iter);
652 }
653
654 mutex_unlock(&nfc_devlist_mutex);
655
656 cb->args[1] = (long) dev;
657
658 return skb->len;
659 }
660
661 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
662 {
663 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
664
665 nfc_device_iter_exit(iter);
666 kfree(iter);
667
668 return 0;
669 }
670
671 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
672 u8 comm_mode, u8 rf_mode)
673 {
674 struct sk_buff *msg;
675 void *hdr;
676
677 pr_debug("DEP link is up\n");
678
679 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
680 if (!msg)
681 return -ENOMEM;
682
683 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
684 if (!hdr)
685 goto free_msg;
686
687 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
688 goto nla_put_failure;
689 if (rf_mode == NFC_RF_INITIATOR &&
690 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
691 goto nla_put_failure;
692 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
693 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
694 goto nla_put_failure;
695
696 genlmsg_end(msg, hdr);
697
698 dev->dep_link_up = true;
699
700 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
701
702 return 0;
703
704 nla_put_failure:
705 genlmsg_cancel(msg, hdr);
706 free_msg:
707 nlmsg_free(msg);
708 return -EMSGSIZE;
709 }
710
711 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
712 {
713 struct sk_buff *msg;
714 void *hdr;
715
716 pr_debug("DEP link is down\n");
717
718 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
719 if (!msg)
720 return -ENOMEM;
721
722 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
723 NFC_CMD_DEP_LINK_DOWN);
724 if (!hdr)
725 goto free_msg;
726
727 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
728 goto nla_put_failure;
729
730 genlmsg_end(msg, hdr);
731
732 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
733
734 return 0;
735
736 nla_put_failure:
737 genlmsg_cancel(msg, hdr);
738 free_msg:
739 nlmsg_free(msg);
740 return -EMSGSIZE;
741 }
742
743 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
744 {
745 struct sk_buff *msg;
746 struct nfc_dev *dev;
747 u32 idx;
748 int rc = -ENOBUFS;
749
750 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
751 return -EINVAL;
752
753 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
754
755 dev = nfc_get_device(idx);
756 if (!dev)
757 return -ENODEV;
758
759 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
760 if (!msg) {
761 rc = -ENOMEM;
762 goto out_putdev;
763 }
764
765 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
766 NULL, 0);
767 if (rc < 0)
768 goto out_free;
769
770 nfc_put_device(dev);
771
772 return genlmsg_reply(msg, info);
773
774 out_free:
775 nlmsg_free(msg);
776 out_putdev:
777 nfc_put_device(dev);
778 return rc;
779 }
780
781 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
782 {
783 struct nfc_dev *dev;
784 int rc;
785 u32 idx;
786
787 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
788 return -EINVAL;
789
790 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
791
792 dev = nfc_get_device(idx);
793 if (!dev)
794 return -ENODEV;
795
796 rc = nfc_dev_up(dev);
797
798 nfc_put_device(dev);
799 return rc;
800 }
801
802 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
803 {
804 struct nfc_dev *dev;
805 int rc;
806 u32 idx;
807
808 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
809 return -EINVAL;
810
811 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
812
813 dev = nfc_get_device(idx);
814 if (!dev)
815 return -ENODEV;
816
817 rc = nfc_dev_down(dev);
818
819 nfc_put_device(dev);
820 return rc;
821 }
822
823 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
824 {
825 struct nfc_dev *dev;
826 int rc;
827 u32 idx;
828 u32 im_protocols = 0, tm_protocols = 0;
829
830 pr_debug("Poll start\n");
831
832 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
833 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
834 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
835 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
836 return -EINVAL;
837
838 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
839
840 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
841 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
842
843 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
844 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
845 else if (info->attrs[NFC_ATTR_PROTOCOLS])
846 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
847
848 dev = nfc_get_device(idx);
849 if (!dev)
850 return -ENODEV;
851
852 mutex_lock(&dev->genl_data.genl_data_mutex);
853
854 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
855 if (!rc)
856 dev->genl_data.poll_req_portid = info->snd_portid;
857
858 mutex_unlock(&dev->genl_data.genl_data_mutex);
859
860 nfc_put_device(dev);
861 return rc;
862 }
863
864 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
865 {
866 struct nfc_dev *dev;
867 int rc;
868 u32 idx;
869
870 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
871 return -EINVAL;
872
873 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
874
875 dev = nfc_get_device(idx);
876 if (!dev)
877 return -ENODEV;
878
879 device_lock(&dev->dev);
880
881 if (!dev->polling) {
882 device_unlock(&dev->dev);
883 return -EINVAL;
884 }
885
886 device_unlock(&dev->dev);
887
888 mutex_lock(&dev->genl_data.genl_data_mutex);
889
890 if (dev->genl_data.poll_req_portid != info->snd_portid) {
891 rc = -EBUSY;
892 goto out;
893 }
894
895 rc = nfc_stop_poll(dev);
896 dev->genl_data.poll_req_portid = 0;
897
898 out:
899 mutex_unlock(&dev->genl_data.genl_data_mutex);
900 nfc_put_device(dev);
901 return rc;
902 }
903
904 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
905 {
906 struct nfc_dev *dev;
907 u32 device_idx, target_idx, protocol;
908 int rc;
909
910 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
911 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
912 !info->attrs[NFC_ATTR_PROTOCOLS])
913 return -EINVAL;
914
915 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
916
917 dev = nfc_get_device(device_idx);
918 if (!dev)
919 return -ENODEV;
920
921 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
922 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
923
924 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
925 rc = nfc_activate_target(dev, target_idx, protocol);
926
927 nfc_put_device(dev);
928 return rc;
929 }
930
931 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
932 {
933 struct nfc_dev *dev;
934 int rc, tgt_idx;
935 u32 idx;
936 u8 comm;
937
938 pr_debug("DEP link up\n");
939
940 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
941 !info->attrs[NFC_ATTR_COMM_MODE])
942 return -EINVAL;
943
944 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
945 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
946 tgt_idx = NFC_TARGET_IDX_ANY;
947 else
948 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
949
950 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
951
952 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
953 return -EINVAL;
954
955 dev = nfc_get_device(idx);
956 if (!dev)
957 return -ENODEV;
958
959 rc = nfc_dep_link_up(dev, tgt_idx, comm);
960
961 nfc_put_device(dev);
962
963 return rc;
964 }
965
966 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
967 {
968 struct nfc_dev *dev;
969 int rc;
970 u32 idx;
971
972 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
973 return -EINVAL;
974
975 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
976
977 dev = nfc_get_device(idx);
978 if (!dev)
979 return -ENODEV;
980
981 rc = nfc_dep_link_down(dev);
982
983 nfc_put_device(dev);
984 return rc;
985 }
986
987 static int nfc_genl_send_params(struct sk_buff *msg,
988 struct nfc_llcp_local *local,
989 u32 portid, u32 seq)
990 {
991 void *hdr;
992
993 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
994 NFC_CMD_LLC_GET_PARAMS);
995 if (!hdr)
996 return -EMSGSIZE;
997
998 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
999 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1000 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1001 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1002 goto nla_put_failure;
1003
1004 genlmsg_end(msg, hdr);
1005 return 0;
1006
1007 nla_put_failure:
1008
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(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1171 nfc_sdp_genl_policy, info->extack);
1172
1173 if (rc != 0) {
1174 rc = -EINVAL;
1175 goto exit;
1176 }
1177
1178 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1179 continue;
1180
1181 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1182 if (uri_len == 0)
1183 continue;
1184
1185 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1186 if (uri == NULL || *uri == 0)
1187 continue;
1188
1189 tid = local->sdreq_next_tid++;
1190
1191 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1192 if (sdreq == NULL) {
1193 rc = -ENOMEM;
1194 goto exit;
1195 }
1196
1197 tlvs_len += sdreq->tlv_len;
1198
1199 hlist_add_head(&sdreq->node, &sdreq_list);
1200 }
1201
1202 if (hlist_empty(&sdreq_list)) {
1203 rc = -EINVAL;
1204 goto exit;
1205 }
1206
1207 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1208 exit:
1209 device_unlock(&dev->dev);
1210
1211 nfc_put_device(dev);
1212
1213 return rc;
1214 }
1215
1216 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1217 {
1218 struct nfc_dev *dev;
1219 int rc;
1220 u32 idx;
1221 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1222
1223 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1224 return -EINVAL;
1225
1226 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1227
1228 dev = nfc_get_device(idx);
1229 if (!dev)
1230 return -ENODEV;
1231
1232 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1233 sizeof(firmware_name));
1234
1235 rc = nfc_fw_download(dev, firmware_name);
1236
1237 nfc_put_device(dev);
1238 return rc;
1239 }
1240
1241 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1242 u32 result)
1243 {
1244 struct sk_buff *msg;
1245 void *hdr;
1246
1247 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1248 if (!msg)
1249 return -ENOMEM;
1250
1251 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1252 NFC_CMD_FW_DOWNLOAD);
1253 if (!hdr)
1254 goto free_msg;
1255
1256 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1257 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1258 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1259 goto nla_put_failure;
1260
1261 genlmsg_end(msg, hdr);
1262
1263 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1264
1265 return 0;
1266
1267 nla_put_failure:
1268 genlmsg_cancel(msg, hdr);
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, &nfc_genl_family);
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 genlmsg_cancel(msg, hdr);
1486 free_msg:
1487 nlmsg_free(msg);
1488 kfree(ctx);
1489
1490 return;
1491 }
1492
1493 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1494 {
1495 struct nfc_dev *dev;
1496 struct se_io_ctx *ctx;
1497 u32 dev_idx, se_idx;
1498 u8 *apdu;
1499 size_t apdu_len;
1500
1501 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1502 !info->attrs[NFC_ATTR_SE_INDEX] ||
1503 !info->attrs[NFC_ATTR_SE_APDU])
1504 return -EINVAL;
1505
1506 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1507 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1508
1509 dev = nfc_get_device(dev_idx);
1510 if (!dev)
1511 return -ENODEV;
1512
1513 if (!dev->ops || !dev->ops->se_io)
1514 return -ENOTSUPP;
1515
1516 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1517 if (apdu_len == 0)
1518 return -EINVAL;
1519
1520 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1521 if (!apdu)
1522 return -EINVAL;
1523
1524 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1525 if (!ctx)
1526 return -ENOMEM;
1527
1528 ctx->dev_idx = dev_idx;
1529 ctx->se_idx = se_idx;
1530
1531 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1532 }
1533
1534 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1535 struct genl_info *info)
1536 {
1537 struct nfc_dev *dev;
1538 struct nfc_vendor_cmd *cmd;
1539 u32 dev_idx, vid, subcmd;
1540 u8 *data;
1541 size_t data_len;
1542 int i, err;
1543
1544 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1545 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1546 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1547 return -EINVAL;
1548
1549 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1550 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1551 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1552
1553 dev = nfc_get_device(dev_idx);
1554 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1555 return -ENODEV;
1556
1557 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1558 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1559 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1560 if (data_len == 0)
1561 return -EINVAL;
1562 } else {
1563 data = NULL;
1564 data_len = 0;
1565 }
1566
1567 for (i = 0; i < dev->n_vendor_cmds; i++) {
1568 cmd = &dev->vendor_cmds[i];
1569
1570 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1571 continue;
1572
1573 dev->cur_cmd_info = info;
1574 err = cmd->doit(dev, data, data_len);
1575 dev->cur_cmd_info = NULL;
1576 return err;
1577 }
1578
1579 return -EOPNOTSUPP;
1580 }
1581
1582 /* message building helper */
1583 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1584 int flags, u8 cmd)
1585 {
1586 /* since there is no private header just add the generic one */
1587 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1588 }
1589
1590 static struct sk_buff *
1591 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1592 u32 portid, u32 seq,
1593 enum nfc_attrs attr,
1594 u32 oui, u32 subcmd, gfp_t gfp)
1595 {
1596 struct sk_buff *skb;
1597 void *hdr;
1598
1599 skb = nlmsg_new(approxlen + 100, gfp);
1600 if (!skb)
1601 return NULL;
1602
1603 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1604 if (!hdr) {
1605 kfree_skb(skb);
1606 return NULL;
1607 }
1608
1609 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1610 goto nla_put_failure;
1611 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1612 goto nla_put_failure;
1613 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1614 goto nla_put_failure;
1615
1616 ((void **)skb->cb)[0] = dev;
1617 ((void **)skb->cb)[1] = hdr;
1618
1619 return skb;
1620
1621 nla_put_failure:
1622 kfree_skb(skb);
1623 return NULL;
1624 }
1625
1626 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1627 enum nfc_attrs attr,
1628 u32 oui, u32 subcmd,
1629 int approxlen)
1630 {
1631 if (WARN_ON(!dev->cur_cmd_info))
1632 return NULL;
1633
1634 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1635 dev->cur_cmd_info->snd_portid,
1636 dev->cur_cmd_info->snd_seq, attr,
1637 oui, subcmd, GFP_KERNEL);
1638 }
1639 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1640
1641 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1642 {
1643 struct nfc_dev *dev = ((void **)skb->cb)[0];
1644 void *hdr = ((void **)skb->cb)[1];
1645
1646 /* clear CB data for netlink core to own from now on */
1647 memset(skb->cb, 0, sizeof(skb->cb));
1648
1649 if (WARN_ON(!dev->cur_cmd_info)) {
1650 kfree_skb(skb);
1651 return -EINVAL;
1652 }
1653
1654 genlmsg_end(skb, hdr);
1655 return genlmsg_reply(skb, dev->cur_cmd_info);
1656 }
1657 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1658
1659 static const struct genl_ops nfc_genl_ops[] = {
1660 {
1661 .cmd = NFC_CMD_GET_DEVICE,
1662 .doit = nfc_genl_get_device,
1663 .dumpit = nfc_genl_dump_devices,
1664 .done = nfc_genl_dump_devices_done,
1665 .policy = nfc_genl_policy,
1666 },
1667 {
1668 .cmd = NFC_CMD_DEV_UP,
1669 .doit = nfc_genl_dev_up,
1670 .policy = nfc_genl_policy,
1671 },
1672 {
1673 .cmd = NFC_CMD_DEV_DOWN,
1674 .doit = nfc_genl_dev_down,
1675 .policy = nfc_genl_policy,
1676 },
1677 {
1678 .cmd = NFC_CMD_START_POLL,
1679 .doit = nfc_genl_start_poll,
1680 .policy = nfc_genl_policy,
1681 },
1682 {
1683 .cmd = NFC_CMD_STOP_POLL,
1684 .doit = nfc_genl_stop_poll,
1685 .policy = nfc_genl_policy,
1686 },
1687 {
1688 .cmd = NFC_CMD_DEP_LINK_UP,
1689 .doit = nfc_genl_dep_link_up,
1690 .policy = nfc_genl_policy,
1691 },
1692 {
1693 .cmd = NFC_CMD_DEP_LINK_DOWN,
1694 .doit = nfc_genl_dep_link_down,
1695 .policy = nfc_genl_policy,
1696 },
1697 {
1698 .cmd = NFC_CMD_GET_TARGET,
1699 .dumpit = nfc_genl_dump_targets,
1700 .done = nfc_genl_dump_targets_done,
1701 .policy = nfc_genl_policy,
1702 },
1703 {
1704 .cmd = NFC_CMD_LLC_GET_PARAMS,
1705 .doit = nfc_genl_llc_get_params,
1706 .policy = nfc_genl_policy,
1707 },
1708 {
1709 .cmd = NFC_CMD_LLC_SET_PARAMS,
1710 .doit = nfc_genl_llc_set_params,
1711 .policy = nfc_genl_policy,
1712 },
1713 {
1714 .cmd = NFC_CMD_LLC_SDREQ,
1715 .doit = nfc_genl_llc_sdreq,
1716 .policy = nfc_genl_policy,
1717 },
1718 {
1719 .cmd = NFC_CMD_FW_DOWNLOAD,
1720 .doit = nfc_genl_fw_download,
1721 .policy = nfc_genl_policy,
1722 },
1723 {
1724 .cmd = NFC_CMD_ENABLE_SE,
1725 .doit = nfc_genl_enable_se,
1726 .policy = nfc_genl_policy,
1727 },
1728 {
1729 .cmd = NFC_CMD_DISABLE_SE,
1730 .doit = nfc_genl_disable_se,
1731 .policy = nfc_genl_policy,
1732 },
1733 {
1734 .cmd = NFC_CMD_GET_SE,
1735 .dumpit = nfc_genl_dump_ses,
1736 .done = nfc_genl_dump_ses_done,
1737 .policy = nfc_genl_policy,
1738 },
1739 {
1740 .cmd = NFC_CMD_SE_IO,
1741 .doit = nfc_genl_se_io,
1742 .policy = nfc_genl_policy,
1743 },
1744 {
1745 .cmd = NFC_CMD_ACTIVATE_TARGET,
1746 .doit = nfc_genl_activate_target,
1747 .policy = nfc_genl_policy,
1748 },
1749 {
1750 .cmd = NFC_CMD_VENDOR,
1751 .doit = nfc_genl_vendor_cmd,
1752 .policy = nfc_genl_policy,
1753 },
1754 };
1755
1756 static struct genl_family nfc_genl_family __ro_after_init = {
1757 .hdrsize = 0,
1758 .name = NFC_GENL_NAME,
1759 .version = NFC_GENL_VERSION,
1760 .maxattr = NFC_ATTR_MAX,
1761 .module = THIS_MODULE,
1762 .ops = nfc_genl_ops,
1763 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1764 .mcgrps = nfc_genl_mcgrps,
1765 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1766 };
1767
1768
1769 struct urelease_work {
1770 struct work_struct w;
1771 u32 portid;
1772 };
1773
1774 static void nfc_urelease_event_work(struct work_struct *work)
1775 {
1776 struct urelease_work *w = container_of(work, struct urelease_work, w);
1777 struct class_dev_iter iter;
1778 struct nfc_dev *dev;
1779
1780 pr_debug("portid %d\n", w->portid);
1781
1782 mutex_lock(&nfc_devlist_mutex);
1783
1784 nfc_device_iter_init(&iter);
1785 dev = nfc_device_iter_next(&iter);
1786
1787 while (dev) {
1788 mutex_lock(&dev->genl_data.genl_data_mutex);
1789
1790 if (dev->genl_data.poll_req_portid == w->portid) {
1791 nfc_stop_poll(dev);
1792 dev->genl_data.poll_req_portid = 0;
1793 }
1794
1795 mutex_unlock(&dev->genl_data.genl_data_mutex);
1796
1797 dev = nfc_device_iter_next(&iter);
1798 }
1799
1800 nfc_device_iter_exit(&iter);
1801
1802 mutex_unlock(&nfc_devlist_mutex);
1803
1804 kfree(w);
1805 }
1806
1807 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1808 unsigned long event, void *ptr)
1809 {
1810 struct netlink_notify *n = ptr;
1811 struct urelease_work *w;
1812
1813 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1814 goto out;
1815
1816 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1817
1818 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1819 if (w) {
1820 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1821 w->portid = n->portid;
1822 schedule_work((struct work_struct *) w);
1823 }
1824
1825 out:
1826 return NOTIFY_DONE;
1827 }
1828
1829 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1830 {
1831 genl_data->poll_req_portid = 0;
1832 mutex_init(&genl_data->genl_data_mutex);
1833 }
1834
1835 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1836 {
1837 mutex_destroy(&genl_data->genl_data_mutex);
1838 }
1839
1840 static struct notifier_block nl_notifier = {
1841 .notifier_call = nfc_genl_rcv_nl_event,
1842 };
1843
1844 /**
1845 * nfc_genl_init() - Initialize netlink interface
1846 *
1847 * This initialization function registers the nfc netlink family.
1848 */
1849 int __init nfc_genl_init(void)
1850 {
1851 int rc;
1852
1853 rc = genl_register_family(&nfc_genl_family);
1854 if (rc)
1855 return rc;
1856
1857 netlink_register_notifier(&nl_notifier);
1858
1859 return 0;
1860 }
1861
1862 /**
1863 * nfc_genl_exit() - Deinitialize netlink interface
1864 *
1865 * This exit function unregisters the nfc netlink family.
1866 */
1867 void nfc_genl_exit(void)
1868 {
1869 netlink_unregister_notifier(&nl_notifier);
1870 genl_unregister_family(&nfc_genl_family);
1871 }