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