?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
sctp: use transport pf_retrans in sctp_do_8_2_transport_strike
[linux-stable.git] / net / nfc / netlink.c
blob08ed6abe4aaedc2c2854902fd3caf60974b8b287
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 .len = U8_MAX - 4 },
66 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
67 };
68
69 static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
70 struct netlink_callback *cb, int flags)
71 {
72 void *hdr;
73
74 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
75 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
76 if (!hdr)
77 return -EMSGSIZE;
78
79 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
80
81 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
82 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
83 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
84 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
85 goto nla_put_failure;
86 if (target->nfcid1_len > 0 &&
87 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
88 target->nfcid1))
89 goto nla_put_failure;
90 if (target->sensb_res_len > 0 &&
91 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
92 target->sensb_res))
93 goto nla_put_failure;
94 if (target->sensf_res_len > 0 &&
95 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
96 target->sensf_res))
97 goto nla_put_failure;
98
99 if (target->is_iso15693) {
100 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
101 target->iso15693_dsfid) ||
102 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
103 sizeof(target->iso15693_uid), target->iso15693_uid))
104 goto nla_put_failure;
105 }
106
107 genlmsg_end(msg, hdr);
108 return 0;
109
110 nla_put_failure:
111 genlmsg_cancel(msg, hdr);
112 return -EMSGSIZE;
113 }
114
115 static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
116 {
117 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
118 struct nfc_dev *dev;
119 int rc;
120 u32 idx;
121
122 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
123 attrbuf, nfc_genl_family.maxattr, nfc_genl_policy,
124 NULL);
125 if (rc < 0)
126 return ERR_PTR(rc);
127
128 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
129 return ERR_PTR(-EINVAL);
130
131 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
132
133 dev = nfc_get_device(idx);
134 if (!dev)
135 return ERR_PTR(-ENODEV);
136
137 return dev;
138 }
139
140 static int nfc_genl_dump_targets(struct sk_buff *skb,
141 struct netlink_callback *cb)
142 {
143 int i = cb->args[0];
144 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
145 int rc;
146
147 if (!dev) {
148 dev = __get_device_from_cb(cb);
149 if (IS_ERR(dev))
150 return PTR_ERR(dev);
151
152 cb->args[1] = (long) dev;
153 }
154
155 device_lock(&dev->dev);
156
157 cb->seq = dev->targets_generation;
158
159 while (i < dev->n_targets) {
160 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
161 NLM_F_MULTI);
162 if (rc < 0)
163 break;
164
165 i++;
166 }
167
168 device_unlock(&dev->dev);
169
170 cb->args[0] = i;
171
172 return skb->len;
173 }
174
175 static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
176 {
177 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
178
179 if (dev)
180 nfc_put_device(dev);
181
182 return 0;
183 }
184
185 int nfc_genl_targets_found(struct nfc_dev *dev)
186 {
187 struct sk_buff *msg;
188 void *hdr;
189
190 dev->genl_data.poll_req_portid = 0;
191
192 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
193 if (!msg)
194 return -ENOMEM;
195
196 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
197 NFC_EVENT_TARGETS_FOUND);
198 if (!hdr)
199 goto free_msg;
200
201 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
202 goto nla_put_failure;
203
204 genlmsg_end(msg, hdr);
205
206 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
207
208 nla_put_failure:
209 genlmsg_cancel(msg, hdr);
210 free_msg:
211 nlmsg_free(msg);
212 return -EMSGSIZE;
213 }
214
215 int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
216 {
217 struct sk_buff *msg;
218 void *hdr;
219
220 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
221 if (!msg)
222 return -ENOMEM;
223
224 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
225 NFC_EVENT_TARGET_LOST);
226 if (!hdr)
227 goto free_msg;
228
229 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
230 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
231 goto nla_put_failure;
232
233 genlmsg_end(msg, hdr);
234
235 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
236
237 return 0;
238
239 nla_put_failure:
240 genlmsg_cancel(msg, hdr);
241 free_msg:
242 nlmsg_free(msg);
243 return -EMSGSIZE;
244 }
245
246 int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
247 {
248 struct sk_buff *msg;
249 void *hdr;
250
251 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
252 if (!msg)
253 return -ENOMEM;
254
255 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
256 NFC_EVENT_TM_ACTIVATED);
257 if (!hdr)
258 goto free_msg;
259
260 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
261 goto nla_put_failure;
262 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
263 goto nla_put_failure;
264
265 genlmsg_end(msg, hdr);
266
267 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
268
269 return 0;
270
271 nla_put_failure:
272 genlmsg_cancel(msg, hdr);
273 free_msg:
274 nlmsg_free(msg);
275 return -EMSGSIZE;
276 }
277
278 int nfc_genl_tm_deactivated(struct nfc_dev *dev)
279 {
280 struct sk_buff *msg;
281 void *hdr;
282
283 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
284 if (!msg)
285 return -ENOMEM;
286
287 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
288 NFC_EVENT_TM_DEACTIVATED);
289 if (!hdr)
290 goto free_msg;
291
292 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
293 goto nla_put_failure;
294
295 genlmsg_end(msg, hdr);
296
297 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
298
299 return 0;
300
301 nla_put_failure:
302 genlmsg_cancel(msg, hdr);
303 free_msg:
304 nlmsg_free(msg);
305 return -EMSGSIZE;
306 }
307
308 static int nfc_genl_setup_device_added(struct nfc_dev *dev, struct sk_buff *msg)
309 {
310 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
311 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
312 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
313 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
314 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
315 return -1;
316 return 0;
317 }
318
319 int nfc_genl_device_added(struct nfc_dev *dev)
320 {
321 struct sk_buff *msg;
322 void *hdr;
323
324 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
325 if (!msg)
326 return -ENOMEM;
327
328 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
329 NFC_EVENT_DEVICE_ADDED);
330 if (!hdr)
331 goto free_msg;
332
333 if (nfc_genl_setup_device_added(dev, msg))
334 goto nla_put_failure;
335
336 genlmsg_end(msg, hdr);
337
338 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
339
340 return 0;
341
342 nla_put_failure:
343 genlmsg_cancel(msg, hdr);
344 free_msg:
345 nlmsg_free(msg);
346 return -EMSGSIZE;
347 }
348
349 int nfc_genl_device_removed(struct nfc_dev *dev)
350 {
351 struct sk_buff *msg;
352 void *hdr;
353
354 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
355 if (!msg)
356 return -ENOMEM;
357
358 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
359 NFC_EVENT_DEVICE_REMOVED);
360 if (!hdr)
361 goto free_msg;
362
363 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
364 goto nla_put_failure;
365
366 genlmsg_end(msg, hdr);
367
368 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
369
370 return 0;
371
372 nla_put_failure:
373 genlmsg_cancel(msg, hdr);
374 free_msg:
375 nlmsg_free(msg);
376 return -EMSGSIZE;
377 }
378
379 int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
380 {
381 struct sk_buff *msg;
382 struct nlattr *sdp_attr, *uri_attr;
383 struct nfc_llcp_sdp_tlv *sdres;
384 struct hlist_node *n;
385 void *hdr;
386 int rc = -EMSGSIZE;
387 int i;
388
389 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
390 if (!msg)
391 return -ENOMEM;
392
393 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
394 NFC_EVENT_LLC_SDRES);
395 if (!hdr)
396 goto free_msg;
397
398 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
399 goto nla_put_failure;
400
401 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
402 if (sdp_attr == NULL) {
403 rc = -ENOMEM;
404 goto nla_put_failure;
405 }
406
407 i = 1;
408 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
409 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
410
411 uri_attr = nla_nest_start(msg, i++);
412 if (uri_attr == NULL) {
413 rc = -ENOMEM;
414 goto nla_put_failure;
415 }
416
417 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
418 goto nla_put_failure;
419
420 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
421 goto nla_put_failure;
422
423 nla_nest_end(msg, uri_attr);
424
425 hlist_del(&sdres->node);
426
427 nfc_llcp_free_sdp_tlv(sdres);
428 }
429
430 nla_nest_end(msg, sdp_attr);
431
432 genlmsg_end(msg, hdr);
433
434 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
435
436 nla_put_failure:
437 genlmsg_cancel(msg, hdr);
438
439 free_msg:
440 nlmsg_free(msg);
441
442 nfc_llcp_free_sdp_tlv_list(sdres_list);
443
444 return rc;
445 }
446
447 int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
448 {
449 struct sk_buff *msg;
450 void *hdr;
451
452 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
453 if (!msg)
454 return -ENOMEM;
455
456 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
457 NFC_EVENT_SE_ADDED);
458 if (!hdr)
459 goto free_msg;
460
461 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
462 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
463 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
464 goto nla_put_failure;
465
466 genlmsg_end(msg, hdr);
467
468 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
469
470 return 0;
471
472 nla_put_failure:
473 genlmsg_cancel(msg, hdr);
474 free_msg:
475 nlmsg_free(msg);
476 return -EMSGSIZE;
477 }
478
479 int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
480 {
481 struct sk_buff *msg;
482 void *hdr;
483
484 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
485 if (!msg)
486 return -ENOMEM;
487
488 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
489 NFC_EVENT_SE_REMOVED);
490 if (!hdr)
491 goto free_msg;
492
493 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
494 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
495 goto nla_put_failure;
496
497 genlmsg_end(msg, hdr);
498
499 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
500
501 return 0;
502
503 nla_put_failure:
504 genlmsg_cancel(msg, hdr);
505 free_msg:
506 nlmsg_free(msg);
507 return -EMSGSIZE;
508 }
509
510 int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
511 struct nfc_evt_transaction *evt_transaction)
512 {
513 struct nfc_se *se;
514 struct sk_buff *msg;
515 void *hdr;
516
517 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
518 if (!msg)
519 return -ENOMEM;
520
521 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
522 NFC_EVENT_SE_TRANSACTION);
523 if (!hdr)
524 goto free_msg;
525
526 se = nfc_find_se(dev, se_idx);
527 if (!se)
528 goto free_msg;
529
530 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
531 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
532 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
533 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
534 evt_transaction->aid) ||
535 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
536 evt_transaction->params))
537 goto nla_put_failure;
538
539 /* evt_transaction is no more used */
540 devm_kfree(&dev->dev, evt_transaction);
541
542 genlmsg_end(msg, hdr);
543
544 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
545
546 return 0;
547
548 nla_put_failure:
549 genlmsg_cancel(msg, hdr);
550 free_msg:
551 /* evt_transaction is no more used */
552 devm_kfree(&dev->dev, evt_transaction);
553 nlmsg_free(msg);
554 return -EMSGSIZE;
555 }
556
557 int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
558 {
559 struct nfc_se *se;
560 struct sk_buff *msg;
561 void *hdr;
562
563 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
564 if (!msg)
565 return -ENOMEM;
566
567 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
568 NFC_EVENT_SE_CONNECTIVITY);
569 if (!hdr)
570 goto free_msg;
571
572 se = nfc_find_se(dev, se_idx);
573 if (!se)
574 goto free_msg;
575
576 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
577 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
578 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
579 goto nla_put_failure;
580
581 genlmsg_end(msg, hdr);
582
583 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
584
585 return 0;
586
587 nla_put_failure:
588 genlmsg_cancel(msg, hdr);
589 free_msg:
590 nlmsg_free(msg);
591 return -EMSGSIZE;
592 }
593
594 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
595 u32 portid, u32 seq,
596 struct netlink_callback *cb,
597 int flags)
598 {
599 void *hdr;
600
601 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
602 NFC_CMD_GET_DEVICE);
603 if (!hdr)
604 return -EMSGSIZE;
605
606 if (cb)
607 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
608
609 if (nfc_genl_setup_device_added(dev, msg))
610 goto nla_put_failure;
611
612 genlmsg_end(msg, hdr);
613 return 0;
614
615 nla_put_failure:
616 genlmsg_cancel(msg, hdr);
617 return -EMSGSIZE;
618 }
619
620 static int nfc_genl_dump_devices(struct sk_buff *skb,
621 struct netlink_callback *cb)
622 {
623 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
624 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
625 bool first_call = false;
626
627 if (!iter) {
628 first_call = true;
629 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
630 if (!iter)
631 return -ENOMEM;
632 cb->args[0] = (long) iter;
633 }
634
635 mutex_lock(&nfc_devlist_mutex);
636
637 cb->seq = nfc_devlist_generation;
638
639 if (first_call) {
640 nfc_device_iter_init(iter);
641 dev = nfc_device_iter_next(iter);
642 }
643
644 while (dev) {
645 int rc;
646
647 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
648 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
649 if (rc < 0)
650 break;
651
652 dev = nfc_device_iter_next(iter);
653 }
654
655 mutex_unlock(&nfc_devlist_mutex);
656
657 cb->args[1] = (long) dev;
658
659 return skb->len;
660 }
661
662 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
663 {
664 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
665
666 nfc_device_iter_exit(iter);
667 kfree(iter);
668
669 return 0;
670 }
671
672 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
673 u8 comm_mode, u8 rf_mode)
674 {
675 struct sk_buff *msg;
676 void *hdr;
677
678 pr_debug("DEP link is up\n");
679
680 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
681 if (!msg)
682 return -ENOMEM;
683
684 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
685 if (!hdr)
686 goto free_msg;
687
688 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
689 goto nla_put_failure;
690 if (rf_mode == NFC_RF_INITIATOR &&
691 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
692 goto nla_put_failure;
693 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
694 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
695 goto nla_put_failure;
696
697 genlmsg_end(msg, hdr);
698
699 dev->dep_link_up = true;
700
701 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
702
703 return 0;
704
705 nla_put_failure:
706 genlmsg_cancel(msg, hdr);
707 free_msg:
708 nlmsg_free(msg);
709 return -EMSGSIZE;
710 }
711
712 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
713 {
714 struct sk_buff *msg;
715 void *hdr;
716
717 pr_debug("DEP link is down\n");
718
719 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
720 if (!msg)
721 return -ENOMEM;
722
723 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
724 NFC_CMD_DEP_LINK_DOWN);
725 if (!hdr)
726 goto free_msg;
727
728 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
729 goto nla_put_failure;
730
731 genlmsg_end(msg, hdr);
732
733 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
734
735 return 0;
736
737 nla_put_failure:
738 genlmsg_cancel(msg, hdr);
739 free_msg:
740 nlmsg_free(msg);
741 return -EMSGSIZE;
742 }
743
744 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
745 {
746 struct sk_buff *msg;
747 struct nfc_dev *dev;
748 u32 idx;
749 int rc = -ENOBUFS;
750
751 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
752 return -EINVAL;
753
754 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
755
756 dev = nfc_get_device(idx);
757 if (!dev)
758 return -ENODEV;
759
760 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
761 if (!msg) {
762 rc = -ENOMEM;
763 goto out_putdev;
764 }
765
766 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
767 NULL, 0);
768 if (rc < 0)
769 goto out_free;
770
771 nfc_put_device(dev);
772
773 return genlmsg_reply(msg, info);
774
775 out_free:
776 nlmsg_free(msg);
777 out_putdev:
778 nfc_put_device(dev);
779 return rc;
780 }
781
782 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
783 {
784 struct nfc_dev *dev;
785 int rc;
786 u32 idx;
787
788 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
789 return -EINVAL;
790
791 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
792
793 dev = nfc_get_device(idx);
794 if (!dev)
795 return -ENODEV;
796
797 rc = nfc_dev_up(dev);
798
799 nfc_put_device(dev);
800 return rc;
801 }
802
803 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
804 {
805 struct nfc_dev *dev;
806 int rc;
807 u32 idx;
808
809 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
810 return -EINVAL;
811
812 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
813
814 dev = nfc_get_device(idx);
815 if (!dev)
816 return -ENODEV;
817
818 rc = nfc_dev_down(dev);
819
820 nfc_put_device(dev);
821 return rc;
822 }
823
824 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
825 {
826 struct nfc_dev *dev;
827 int rc;
828 u32 idx;
829 u32 im_protocols = 0, tm_protocols = 0;
830
831 pr_debug("Poll start\n");
832
833 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
834 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
835 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
836 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
837 return -EINVAL;
838
839 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
840
841 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
842 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
843
844 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
845 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
846 else if (info->attrs[NFC_ATTR_PROTOCOLS])
847 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
848
849 dev = nfc_get_device(idx);
850 if (!dev)
851 return -ENODEV;
852
853 mutex_lock(&dev->genl_data.genl_data_mutex);
854
855 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
856 if (!rc)
857 dev->genl_data.poll_req_portid = info->snd_portid;
858
859 mutex_unlock(&dev->genl_data.genl_data_mutex);
860
861 nfc_put_device(dev);
862 return rc;
863 }
864
865 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
866 {
867 struct nfc_dev *dev;
868 int rc;
869 u32 idx;
870
871 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
872 return -EINVAL;
873
874 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
875
876 dev = nfc_get_device(idx);
877 if (!dev)
878 return -ENODEV;
879
880 device_lock(&dev->dev);
881
882 if (!dev->polling) {
883 device_unlock(&dev->dev);
884 return -EINVAL;
885 }
886
887 device_unlock(&dev->dev);
888
889 mutex_lock(&dev->genl_data.genl_data_mutex);
890
891 if (dev->genl_data.poll_req_portid != info->snd_portid) {
892 rc = -EBUSY;
893 goto out;
894 }
895
896 rc = nfc_stop_poll(dev);
897 dev->genl_data.poll_req_portid = 0;
898
899 out:
900 mutex_unlock(&dev->genl_data.genl_data_mutex);
901 nfc_put_device(dev);
902 return rc;
903 }
904
905 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
906 {
907 struct nfc_dev *dev;
908 u32 device_idx, target_idx, protocol;
909 int rc;
910
911 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
912 !info->attrs[NFC_ATTR_TARGET_INDEX] ||
913 !info->attrs[NFC_ATTR_PROTOCOLS])
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 rc;
930 }
931
932 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
933 {
934 struct nfc_dev *dev;
935 int rc, tgt_idx;
936 u32 idx;
937 u8 comm;
938
939 pr_debug("DEP link up\n");
940
941 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
942 !info->attrs[NFC_ATTR_COMM_MODE])
943 return -EINVAL;
944
945 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
946 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
947 tgt_idx = NFC_TARGET_IDX_ANY;
948 else
949 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
950
951 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
952
953 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
954 return -EINVAL;
955
956 dev = nfc_get_device(idx);
957 if (!dev)
958 return -ENODEV;
959
960 rc = nfc_dep_link_up(dev, tgt_idx, comm);
961
962 nfc_put_device(dev);
963
964 return rc;
965 }
966
967 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
968 {
969 struct nfc_dev *dev;
970 int rc;
971 u32 idx;
972
973 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
974 return -EINVAL;
975
976 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
977
978 dev = nfc_get_device(idx);
979 if (!dev)
980 return -ENODEV;
981
982 rc = nfc_dep_link_down(dev);
983
984 nfc_put_device(dev);
985 return rc;
986 }
987
988 static int nfc_genl_send_params(struct sk_buff *msg,
989 struct nfc_llcp_local *local,
990 u32 portid, u32 seq)
991 {
992 void *hdr;
993
994 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
995 NFC_CMD_LLC_GET_PARAMS);
996 if (!hdr)
997 return -EMSGSIZE;
998
999 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
1000 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
1001 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
1002 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
1003 goto nla_put_failure;
1004
1005 genlmsg_end(msg, hdr);
1006 return 0;
1007
1008 nla_put_failure:
1009
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, info->extack);
1173
1174 if (rc != 0) {
1175 rc = -EINVAL;
1176 goto exit;
1177 }
1178
1179 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1180 continue;
1181
1182 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1183 if (uri_len == 0)
1184 continue;
1185
1186 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1187 if (uri == NULL || *uri == 0)
1188 continue;
1189
1190 tid = local->sdreq_next_tid++;
1191
1192 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1193 if (sdreq == NULL) {
1194 rc = -ENOMEM;
1195 goto exit;
1196 }
1197
1198 tlvs_len += sdreq->tlv_len;
1199
1200 hlist_add_head(&sdreq->node, &sdreq_list);
1201 }
1202
1203 if (hlist_empty(&sdreq_list)) {
1204 rc = -EINVAL;
1205 goto exit;
1206 }
1207
1208 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1209 exit:
1210 device_unlock(&dev->dev);
1211
1212 nfc_put_device(dev);
1213
1214 return rc;
1215 }
1216
1217 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1218 {
1219 struct nfc_dev *dev;
1220 int rc;
1221 u32 idx;
1222 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1223
1224 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1225 return -EINVAL;
1226
1227 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1228
1229 dev = nfc_get_device(idx);
1230 if (!dev)
1231 return -ENODEV;
1232
1233 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1234 sizeof(firmware_name));
1235
1236 rc = nfc_fw_download(dev, firmware_name);
1237
1238 nfc_put_device(dev);
1239 return rc;
1240 }
1241
1242 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1243 u32 result)
1244 {
1245 struct sk_buff *msg;
1246 void *hdr;
1247
1248 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1249 if (!msg)
1250 return -ENOMEM;
1251
1252 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1253 NFC_CMD_FW_DOWNLOAD);
1254 if (!hdr)
1255 goto free_msg;
1256
1257 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1258 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1259 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1260 goto nla_put_failure;
1261
1262 genlmsg_end(msg, hdr);
1263
1264 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1265
1266 return 0;
1267
1268 nla_put_failure:
1269 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 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 .module = THIS_MODULE,
1763 .ops = nfc_genl_ops,
1764 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1765 .mcgrps = nfc_genl_mcgrps,
1766 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1767 };
1768
1769
1770 struct urelease_work {
1771 struct work_struct w;
1772 u32 portid;
1773 };
1774
1775 static void nfc_urelease_event_work(struct work_struct *work)
1776 {
1777 struct urelease_work *w = container_of(work, struct urelease_work, w);
1778 struct class_dev_iter iter;
1779 struct nfc_dev *dev;
1780
1781 pr_debug("portid %d\n", w->portid);
1782
1783 mutex_lock(&nfc_devlist_mutex);
1784
1785 nfc_device_iter_init(&iter);
1786 dev = nfc_device_iter_next(&iter);
1787
1788 while (dev) {
1789 mutex_lock(&dev->genl_data.genl_data_mutex);
1790
1791 if (dev->genl_data.poll_req_portid == w->portid) {
1792 nfc_stop_poll(dev);
1793 dev->genl_data.poll_req_portid = 0;
1794 }
1795
1796 mutex_unlock(&dev->genl_data.genl_data_mutex);
1797
1798 dev = nfc_device_iter_next(&iter);
1799 }
1800
1801 nfc_device_iter_exit(&iter);
1802
1803 mutex_unlock(&nfc_devlist_mutex);
1804
1805 kfree(w);
1806 }
1807
1808 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1809 unsigned long event, void *ptr)
1810 {
1811 struct netlink_notify *n = ptr;
1812 struct urelease_work *w;
1813
1814 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1815 goto out;
1816
1817 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1818
1819 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1820 if (w) {
1821 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1822 w->portid = n->portid;
1823 schedule_work((struct work_struct *) w);
1824 }
1825
1826 out:
1827 return NOTIFY_DONE;
1828 }
1829
1830 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1831 {
1832 genl_data->poll_req_portid = 0;
1833 mutex_init(&genl_data->genl_data_mutex);
1834 }
1835
1836 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1837 {
1838 mutex_destroy(&genl_data->genl_data_mutex);
1839 }
1840
1841 static struct notifier_block nl_notifier = {
1842 .notifier_call = nfc_genl_rcv_nl_event,
1843 };
1844
1845 /**
1846 * nfc_genl_init() - Initialize netlink interface
1847 *
1848 * This initialization function registers the nfc netlink family.
1849 */
1850 int __init nfc_genl_init(void)
1851 {
1852 int rc;
1853
1854 rc = genl_register_family(&nfc_genl_family);
1855 if (rc)
1856 return rc;
1857
1858 netlink_register_notifier(&nl_notifier);
1859
1860 return 0;
1861 }
1862
1863 /**
1864 * nfc_genl_exit() - Deinitialize netlink interface
1865 *
1866 * This exit function unregisters the nfc netlink family.
1867 */
1868 void nfc_genl_exit(void)
1869 {
1870 netlink_unregister_notifier(&nl_notifier);
1871 genl_unregister_family(&nfc_genl_family);
1872 }
Linux kernel stable tree