?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
x86/mm: Improve switch_mm() barrier comments
[linux-2.6/btrfs-unstable.git] / net / nfc / netlink.c
blobf58c1fba10268b9c1336d205ff294e906dd04791
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 static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
556 u32 portid, u32 seq,
557 struct netlink_callback *cb,
558 int flags)
559 {
560 void *hdr;
561
562 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
563 NFC_CMD_GET_DEVICE);
564 if (!hdr)
565 return -EMSGSIZE;
566
567 if (cb)
568 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
569
570 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
571 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
572 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
573 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
574 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
575 goto nla_put_failure;
576
577 genlmsg_end(msg, hdr);
578 return 0;
579
580 nla_put_failure:
581 genlmsg_cancel(msg, hdr);
582 return -EMSGSIZE;
583 }
584
585 static int nfc_genl_dump_devices(struct sk_buff *skb,
586 struct netlink_callback *cb)
587 {
588 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
589 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
590 bool first_call = false;
591
592 if (!iter) {
593 first_call = true;
594 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
595 if (!iter)
596 return -ENOMEM;
597 cb->args[0] = (long) iter;
598 }
599
600 mutex_lock(&nfc_devlist_mutex);
601
602 cb->seq = nfc_devlist_generation;
603
604 if (first_call) {
605 nfc_device_iter_init(iter);
606 dev = nfc_device_iter_next(iter);
607 }
608
609 while (dev) {
610 int rc;
611
612 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
613 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
614 if (rc < 0)
615 break;
616
617 dev = nfc_device_iter_next(iter);
618 }
619
620 mutex_unlock(&nfc_devlist_mutex);
621
622 cb->args[1] = (long) dev;
623
624 return skb->len;
625 }
626
627 static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
628 {
629 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
630
631 nfc_device_iter_exit(iter);
632 kfree(iter);
633
634 return 0;
635 }
636
637 int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
638 u8 comm_mode, u8 rf_mode)
639 {
640 struct sk_buff *msg;
641 void *hdr;
642
643 pr_debug("DEP link is up\n");
644
645 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
646 if (!msg)
647 return -ENOMEM;
648
649 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
650 if (!hdr)
651 goto free_msg;
652
653 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
654 goto nla_put_failure;
655 if (rf_mode == NFC_RF_INITIATOR &&
656 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
657 goto nla_put_failure;
658 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
659 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
660 goto nla_put_failure;
661
662 genlmsg_end(msg, hdr);
663
664 dev->dep_link_up = true;
665
666 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
667
668 return 0;
669
670 nla_put_failure:
671 genlmsg_cancel(msg, hdr);
672 free_msg:
673 nlmsg_free(msg);
674 return -EMSGSIZE;
675 }
676
677 int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
678 {
679 struct sk_buff *msg;
680 void *hdr;
681
682 pr_debug("DEP link is down\n");
683
684 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
685 if (!msg)
686 return -ENOMEM;
687
688 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
689 NFC_CMD_DEP_LINK_DOWN);
690 if (!hdr)
691 goto free_msg;
692
693 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
694 goto nla_put_failure;
695
696 genlmsg_end(msg, hdr);
697
698 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
699
700 return 0;
701
702 nla_put_failure:
703 genlmsg_cancel(msg, hdr);
704 free_msg:
705 nlmsg_free(msg);
706 return -EMSGSIZE;
707 }
708
709 static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
710 {
711 struct sk_buff *msg;
712 struct nfc_dev *dev;
713 u32 idx;
714 int rc = -ENOBUFS;
715
716 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
717 return -EINVAL;
718
719 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
720
721 dev = nfc_get_device(idx);
722 if (!dev)
723 return -ENODEV;
724
725 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
726 if (!msg) {
727 rc = -ENOMEM;
728 goto out_putdev;
729 }
730
731 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
732 NULL, 0);
733 if (rc < 0)
734 goto out_free;
735
736 nfc_put_device(dev);
737
738 return genlmsg_reply(msg, info);
739
740 out_free:
741 nlmsg_free(msg);
742 out_putdev:
743 nfc_put_device(dev);
744 return rc;
745 }
746
747 static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
748 {
749 struct nfc_dev *dev;
750 int rc;
751 u32 idx;
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 rc = nfc_dev_up(dev);
763
764 nfc_put_device(dev);
765 return rc;
766 }
767
768 static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
769 {
770 struct nfc_dev *dev;
771 int rc;
772 u32 idx;
773
774 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
775 return -EINVAL;
776
777 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
778
779 dev = nfc_get_device(idx);
780 if (!dev)
781 return -ENODEV;
782
783 rc = nfc_dev_down(dev);
784
785 nfc_put_device(dev);
786 return rc;
787 }
788
789 static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
790 {
791 struct nfc_dev *dev;
792 int rc;
793 u32 idx;
794 u32 im_protocols = 0, tm_protocols = 0;
795
796 pr_debug("Poll start\n");
797
798 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
799 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
800 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
801 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
802 return -EINVAL;
803
804 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
805
806 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
807 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
808
809 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
810 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
811 else if (info->attrs[NFC_ATTR_PROTOCOLS])
812 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
813
814 dev = nfc_get_device(idx);
815 if (!dev)
816 return -ENODEV;
817
818 mutex_lock(&dev->genl_data.genl_data_mutex);
819
820 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
821 if (!rc)
822 dev->genl_data.poll_req_portid = info->snd_portid;
823
824 mutex_unlock(&dev->genl_data.genl_data_mutex);
825
826 nfc_put_device(dev);
827 return rc;
828 }
829
830 static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
831 {
832 struct nfc_dev *dev;
833 int rc;
834 u32 idx;
835
836 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
837 return -EINVAL;
838
839 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
840
841 dev = nfc_get_device(idx);
842 if (!dev)
843 return -ENODEV;
844
845 device_lock(&dev->dev);
846
847 if (!dev->polling) {
848 device_unlock(&dev->dev);
849 return -EINVAL;
850 }
851
852 device_unlock(&dev->dev);
853
854 mutex_lock(&dev->genl_data.genl_data_mutex);
855
856 if (dev->genl_data.poll_req_portid != info->snd_portid) {
857 rc = -EBUSY;
858 goto out;
859 }
860
861 rc = nfc_stop_poll(dev);
862 dev->genl_data.poll_req_portid = 0;
863
864 out:
865 mutex_unlock(&dev->genl_data.genl_data_mutex);
866 nfc_put_device(dev);
867 return rc;
868 }
869
870 static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
871 {
872 struct nfc_dev *dev;
873 u32 device_idx, target_idx, protocol;
874 int rc;
875
876 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
877 return -EINVAL;
878
879 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
880
881 dev = nfc_get_device(device_idx);
882 if (!dev)
883 return -ENODEV;
884
885 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
886 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
887
888 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
889 rc = nfc_activate_target(dev, target_idx, protocol);
890
891 nfc_put_device(dev);
892 return 0;
893 }
894
895 static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
896 {
897 struct nfc_dev *dev;
898 int rc, tgt_idx;
899 u32 idx;
900 u8 comm;
901
902 pr_debug("DEP link up\n");
903
904 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
905 !info->attrs[NFC_ATTR_COMM_MODE])
906 return -EINVAL;
907
908 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
909 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
910 tgt_idx = NFC_TARGET_IDX_ANY;
911 else
912 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
913
914 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
915
916 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
917 return -EINVAL;
918
919 dev = nfc_get_device(idx);
920 if (!dev)
921 return -ENODEV;
922
923 rc = nfc_dep_link_up(dev, tgt_idx, comm);
924
925 nfc_put_device(dev);
926
927 return rc;
928 }
929
930 static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
931 {
932 struct nfc_dev *dev;
933 int rc;
934 u32 idx;
935
936 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
937 return -EINVAL;
938
939 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
940
941 dev = nfc_get_device(idx);
942 if (!dev)
943 return -ENODEV;
944
945 rc = nfc_dep_link_down(dev);
946
947 nfc_put_device(dev);
948 return rc;
949 }
950
951 static int nfc_genl_send_params(struct sk_buff *msg,
952 struct nfc_llcp_local *local,
953 u32 portid, u32 seq)
954 {
955 void *hdr;
956
957 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
958 NFC_CMD_LLC_GET_PARAMS);
959 if (!hdr)
960 return -EMSGSIZE;
961
962 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
963 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
964 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
965 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
966 goto nla_put_failure;
967
968 genlmsg_end(msg, hdr);
969 return 0;
970
971 nla_put_failure:
972
973 genlmsg_cancel(msg, hdr);
974 return -EMSGSIZE;
975 }
976
977 static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
978 {
979 struct nfc_dev *dev;
980 struct nfc_llcp_local *local;
981 int rc = 0;
982 struct sk_buff *msg = NULL;
983 u32 idx;
984
985 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
986 return -EINVAL;
987
988 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
989
990 dev = nfc_get_device(idx);
991 if (!dev)
992 return -ENODEV;
993
994 device_lock(&dev->dev);
995
996 local = nfc_llcp_find_local(dev);
997 if (!local) {
998 rc = -ENODEV;
999 goto exit;
1000 }
1001
1002 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1003 if (!msg) {
1004 rc = -ENOMEM;
1005 goto exit;
1006 }
1007
1008 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1009
1010 exit:
1011 device_unlock(&dev->dev);
1012
1013 nfc_put_device(dev);
1014
1015 if (rc < 0) {
1016 if (msg)
1017 nlmsg_free(msg);
1018
1019 return rc;
1020 }
1021
1022 return genlmsg_reply(msg, info);
1023 }
1024
1025 static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1026 {
1027 struct nfc_dev *dev;
1028 struct nfc_llcp_local *local;
1029 u8 rw = 0;
1030 u16 miux = 0;
1031 u32 idx;
1032 int rc = 0;
1033
1034 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1035 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1036 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1037 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1038 return -EINVAL;
1039
1040 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1041 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1042
1043 if (rw > LLCP_MAX_RW)
1044 return -EINVAL;
1045 }
1046
1047 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1048 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1049
1050 if (miux > LLCP_MAX_MIUX)
1051 return -EINVAL;
1052 }
1053
1054 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1055
1056 dev = nfc_get_device(idx);
1057 if (!dev)
1058 return -ENODEV;
1059
1060 device_lock(&dev->dev);
1061
1062 local = nfc_llcp_find_local(dev);
1063 if (!local) {
1064 nfc_put_device(dev);
1065 rc = -ENODEV;
1066 goto exit;
1067 }
1068
1069 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1070 if (dev->dep_link_up) {
1071 rc = -EINPROGRESS;
1072 goto exit;
1073 }
1074
1075 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1076 }
1077
1078 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1079 local->rw = rw;
1080
1081 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1082 local->miux = cpu_to_be16(miux);
1083
1084 exit:
1085 device_unlock(&dev->dev);
1086
1087 nfc_put_device(dev);
1088
1089 return rc;
1090 }
1091
1092 static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1093 {
1094 struct nfc_dev *dev;
1095 struct nfc_llcp_local *local;
1096 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1097 u32 idx;
1098 u8 tid;
1099 char *uri;
1100 int rc = 0, rem;
1101 size_t uri_len, tlvs_len;
1102 struct hlist_head sdreq_list;
1103 struct nfc_llcp_sdp_tlv *sdreq;
1104
1105 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1106 !info->attrs[NFC_ATTR_LLC_SDP])
1107 return -EINVAL;
1108
1109 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1110
1111 dev = nfc_get_device(idx);
1112 if (!dev)
1113 return -ENODEV;
1114
1115 device_lock(&dev->dev);
1116
1117 if (dev->dep_link_up == false) {
1118 rc = -ENOLINK;
1119 goto exit;
1120 }
1121
1122 local = nfc_llcp_find_local(dev);
1123 if (!local) {
1124 nfc_put_device(dev);
1125 rc = -ENODEV;
1126 goto exit;
1127 }
1128
1129 INIT_HLIST_HEAD(&sdreq_list);
1130
1131 tlvs_len = 0;
1132
1133 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1134 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1135 nfc_sdp_genl_policy);
1136
1137 if (rc != 0) {
1138 rc = -EINVAL;
1139 goto exit;
1140 }
1141
1142 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1143 continue;
1144
1145 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1146 if (uri_len == 0)
1147 continue;
1148
1149 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1150 if (uri == NULL || *uri == 0)
1151 continue;
1152
1153 tid = local->sdreq_next_tid++;
1154
1155 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1156 if (sdreq == NULL) {
1157 rc = -ENOMEM;
1158 goto exit;
1159 }
1160
1161 tlvs_len += sdreq->tlv_len;
1162
1163 hlist_add_head(&sdreq->node, &sdreq_list);
1164 }
1165
1166 if (hlist_empty(&sdreq_list)) {
1167 rc = -EINVAL;
1168 goto exit;
1169 }
1170
1171 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1172 exit:
1173 device_unlock(&dev->dev);
1174
1175 nfc_put_device(dev);
1176
1177 return rc;
1178 }
1179
1180 static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
1181 {
1182 struct nfc_dev *dev;
1183 int rc;
1184 u32 idx;
1185 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1186
1187 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1188 return -EINVAL;
1189
1190 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1191
1192 dev = nfc_get_device(idx);
1193 if (!dev)
1194 return -ENODEV;
1195
1196 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1197 sizeof(firmware_name));
1198
1199 rc = nfc_fw_download(dev, firmware_name);
1200
1201 nfc_put_device(dev);
1202 return rc;
1203 }
1204
1205 int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1206 u32 result)
1207 {
1208 struct sk_buff *msg;
1209 void *hdr;
1210
1211 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1212 if (!msg)
1213 return -ENOMEM;
1214
1215 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1216 NFC_CMD_FW_DOWNLOAD);
1217 if (!hdr)
1218 goto free_msg;
1219
1220 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
1221 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
1222 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1223 goto nla_put_failure;
1224
1225 genlmsg_end(msg, hdr);
1226
1227 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1228
1229 return 0;
1230
1231 nla_put_failure:
1232 genlmsg_cancel(msg, hdr);
1233 free_msg:
1234 nlmsg_free(msg);
1235 return -EMSGSIZE;
1236 }
1237
1238 static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1239 {
1240 struct nfc_dev *dev;
1241 int rc;
1242 u32 idx, se_idx;
1243
1244 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1245 !info->attrs[NFC_ATTR_SE_INDEX])
1246 return -EINVAL;
1247
1248 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1249 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1250
1251 dev = nfc_get_device(idx);
1252 if (!dev)
1253 return -ENODEV;
1254
1255 rc = nfc_enable_se(dev, se_idx);
1256
1257 nfc_put_device(dev);
1258 return rc;
1259 }
1260
1261 static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1262 {
1263 struct nfc_dev *dev;
1264 int rc;
1265 u32 idx, se_idx;
1266
1267 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1268 !info->attrs[NFC_ATTR_SE_INDEX])
1269 return -EINVAL;
1270
1271 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1272 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1273
1274 dev = nfc_get_device(idx);
1275 if (!dev)
1276 return -ENODEV;
1277
1278 rc = nfc_disable_se(dev, se_idx);
1279
1280 nfc_put_device(dev);
1281 return rc;
1282 }
1283
1284 static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1285 u32 portid, u32 seq,
1286 struct netlink_callback *cb,
1287 int flags)
1288 {
1289 void *hdr;
1290 struct nfc_se *se, *n;
1291
1292 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1293 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1294 NFC_CMD_GET_SE);
1295 if (!hdr)
1296 goto nla_put_failure;
1297
1298 if (cb)
1299 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1300
1301 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1302 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1303 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1304 goto nla_put_failure;
1305
1306 genlmsg_end(msg, hdr);
1307 }
1308
1309 return 0;
1310
1311 nla_put_failure:
1312 genlmsg_cancel(msg, hdr);
1313 return -EMSGSIZE;
1314 }
1315
1316 static int nfc_genl_dump_ses(struct sk_buff *skb,
1317 struct netlink_callback *cb)
1318 {
1319 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1320 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1321 bool first_call = false;
1322
1323 if (!iter) {
1324 first_call = true;
1325 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1326 if (!iter)
1327 return -ENOMEM;
1328 cb->args[0] = (long) iter;
1329 }
1330
1331 mutex_lock(&nfc_devlist_mutex);
1332
1333 cb->seq = nfc_devlist_generation;
1334
1335 if (first_call) {
1336 nfc_device_iter_init(iter);
1337 dev = nfc_device_iter_next(iter);
1338 }
1339
1340 while (dev) {
1341 int rc;
1342
1343 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1344 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1345 if (rc < 0)
1346 break;
1347
1348 dev = nfc_device_iter_next(iter);
1349 }
1350
1351 mutex_unlock(&nfc_devlist_mutex);
1352
1353 cb->args[1] = (long) dev;
1354
1355 return skb->len;
1356 }
1357
1358 static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1359 {
1360 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1361
1362 nfc_device_iter_exit(iter);
1363 kfree(iter);
1364
1365 return 0;
1366 }
1367
1368 static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1369 u8 *apdu, size_t apdu_length,
1370 se_io_cb_t cb, void *cb_context)
1371 {
1372 struct nfc_se *se;
1373 int rc;
1374
1375 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1376
1377 device_lock(&dev->dev);
1378
1379 if (!device_is_registered(&dev->dev)) {
1380 rc = -ENODEV;
1381 goto error;
1382 }
1383
1384 if (!dev->dev_up) {
1385 rc = -ENODEV;
1386 goto error;
1387 }
1388
1389 if (!dev->ops->se_io) {
1390 rc = -EOPNOTSUPP;
1391 goto error;
1392 }
1393
1394 se = nfc_find_se(dev, se_idx);
1395 if (!se) {
1396 rc = -EINVAL;
1397 goto error;
1398 }
1399
1400 if (se->state != NFC_SE_ENABLED) {
1401 rc = -ENODEV;
1402 goto error;
1403 }
1404
1405 rc = dev->ops->se_io(dev, se_idx, apdu,
1406 apdu_length, cb, cb_context);
1407
1408 error:
1409 device_unlock(&dev->dev);
1410 return rc;
1411 }
1412
1413 struct se_io_ctx {
1414 u32 dev_idx;
1415 u32 se_idx;
1416 };
1417
1418 static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
1419 {
1420 struct se_io_ctx *ctx = context;
1421 struct sk_buff *msg;
1422 void *hdr;
1423
1424 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1425 if (!msg) {
1426 kfree(ctx);
1427 return;
1428 }
1429
1430 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1431 NFC_CMD_SE_IO);
1432 if (!hdr)
1433 goto free_msg;
1434
1435 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1436 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1437 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1438 goto nla_put_failure;
1439
1440 genlmsg_end(msg, hdr);
1441
1442 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
1443
1444 kfree(ctx);
1445
1446 return;
1447
1448 nla_put_failure:
1449 genlmsg_cancel(msg, hdr);
1450 free_msg:
1451 nlmsg_free(msg);
1452 kfree(ctx);
1453
1454 return;
1455 }
1456
1457 static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1458 {
1459 struct nfc_dev *dev;
1460 struct se_io_ctx *ctx;
1461 u32 dev_idx, se_idx;
1462 u8 *apdu;
1463 size_t apdu_len;
1464
1465 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1466 !info->attrs[NFC_ATTR_SE_INDEX] ||
1467 !info->attrs[NFC_ATTR_SE_APDU])
1468 return -EINVAL;
1469
1470 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1471 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1472
1473 dev = nfc_get_device(dev_idx);
1474 if (!dev)
1475 return -ENODEV;
1476
1477 if (!dev->ops || !dev->ops->se_io)
1478 return -ENOTSUPP;
1479
1480 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1481 if (apdu_len == 0)
1482 return -EINVAL;
1483
1484 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1485 if (!apdu)
1486 return -EINVAL;
1487
1488 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1489 if (!ctx)
1490 return -ENOMEM;
1491
1492 ctx->dev_idx = dev_idx;
1493 ctx->se_idx = se_idx;
1494
1495 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
1496 }
1497
1498 static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1499 struct genl_info *info)
1500 {
1501 struct nfc_dev *dev;
1502 struct nfc_vendor_cmd *cmd;
1503 u32 dev_idx, vid, subcmd;
1504 u8 *data;
1505 size_t data_len;
1506 int i, err;
1507
1508 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1509 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1510 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1511 return -EINVAL;
1512
1513 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1514 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1515 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1516
1517 dev = nfc_get_device(dev_idx);
1518 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1519 return -ENODEV;
1520
1521 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1522 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
1523 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1524 if (data_len == 0)
1525 return -EINVAL;
1526 } else {
1527 data = NULL;
1528 data_len = 0;
1529 }
1530
1531 for (i = 0; i < dev->n_vendor_cmds; i++) {
1532 cmd = &dev->vendor_cmds[i];
1533
1534 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1535 continue;
1536
1537 dev->cur_cmd_info = info;
1538 err = cmd->doit(dev, data, data_len);
1539 dev->cur_cmd_info = NULL;
1540 return err;
1541 }
1542
1543 return -EOPNOTSUPP;
1544 }
1545
1546 /* message building helper */
1547 static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1548 int flags, u8 cmd)
1549 {
1550 /* since there is no private header just add the generic one */
1551 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1552 }
1553
1554 static struct sk_buff *
1555 __nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1556 u32 portid, u32 seq,
1557 enum nfc_attrs attr,
1558 u32 oui, u32 subcmd, gfp_t gfp)
1559 {
1560 struct sk_buff *skb;
1561 void *hdr;
1562
1563 skb = nlmsg_new(approxlen + 100, gfp);
1564 if (!skb)
1565 return NULL;
1566
1567 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1568 if (!hdr) {
1569 kfree_skb(skb);
1570 return NULL;
1571 }
1572
1573 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1574 goto nla_put_failure;
1575 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1576 goto nla_put_failure;
1577 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1578 goto nla_put_failure;
1579
1580 ((void **)skb->cb)[0] = dev;
1581 ((void **)skb->cb)[1] = hdr;
1582
1583 return skb;
1584
1585 nla_put_failure:
1586 kfree_skb(skb);
1587 return NULL;
1588 }
1589
1590 struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1591 enum nfc_attrs attr,
1592 u32 oui, u32 subcmd,
1593 int approxlen)
1594 {
1595 if (WARN_ON(!dev->cur_cmd_info))
1596 return NULL;
1597
1598 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1599 dev->cur_cmd_info->snd_portid,
1600 dev->cur_cmd_info->snd_seq, attr,
1601 oui, subcmd, GFP_KERNEL);
1602 }
1603 EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1604
1605 int nfc_vendor_cmd_reply(struct sk_buff *skb)
1606 {
1607 struct nfc_dev *dev = ((void **)skb->cb)[0];
1608 void *hdr = ((void **)skb->cb)[1];
1609
1610 /* clear CB data for netlink core to own from now on */
1611 memset(skb->cb, 0, sizeof(skb->cb));
1612
1613 if (WARN_ON(!dev->cur_cmd_info)) {
1614 kfree_skb(skb);
1615 return -EINVAL;
1616 }
1617
1618 genlmsg_end(skb, hdr);
1619 return genlmsg_reply(skb, dev->cur_cmd_info);
1620 }
1621 EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1622
1623 static const struct genl_ops nfc_genl_ops[] = {
1624 {
1625 .cmd = NFC_CMD_GET_DEVICE,
1626 .doit = nfc_genl_get_device,
1627 .dumpit = nfc_genl_dump_devices,
1628 .done = nfc_genl_dump_devices_done,
1629 .policy = nfc_genl_policy,
1630 },
1631 {
1632 .cmd = NFC_CMD_DEV_UP,
1633 .doit = nfc_genl_dev_up,
1634 .policy = nfc_genl_policy,
1635 },
1636 {
1637 .cmd = NFC_CMD_DEV_DOWN,
1638 .doit = nfc_genl_dev_down,
1639 .policy = nfc_genl_policy,
1640 },
1641 {
1642 .cmd = NFC_CMD_START_POLL,
1643 .doit = nfc_genl_start_poll,
1644 .policy = nfc_genl_policy,
1645 },
1646 {
1647 .cmd = NFC_CMD_STOP_POLL,
1648 .doit = nfc_genl_stop_poll,
1649 .policy = nfc_genl_policy,
1650 },
1651 {
1652 .cmd = NFC_CMD_DEP_LINK_UP,
1653 .doit = nfc_genl_dep_link_up,
1654 .policy = nfc_genl_policy,
1655 },
1656 {
1657 .cmd = NFC_CMD_DEP_LINK_DOWN,
1658 .doit = nfc_genl_dep_link_down,
1659 .policy = nfc_genl_policy,
1660 },
1661 {
1662 .cmd = NFC_CMD_GET_TARGET,
1663 .dumpit = nfc_genl_dump_targets,
1664 .done = nfc_genl_dump_targets_done,
1665 .policy = nfc_genl_policy,
1666 },
1667 {
1668 .cmd = NFC_CMD_LLC_GET_PARAMS,
1669 .doit = nfc_genl_llc_get_params,
1670 .policy = nfc_genl_policy,
1671 },
1672 {
1673 .cmd = NFC_CMD_LLC_SET_PARAMS,
1674 .doit = nfc_genl_llc_set_params,
1675 .policy = nfc_genl_policy,
1676 },
1677 {
1678 .cmd = NFC_CMD_LLC_SDREQ,
1679 .doit = nfc_genl_llc_sdreq,
1680 .policy = nfc_genl_policy,
1681 },
1682 {
1683 .cmd = NFC_CMD_FW_DOWNLOAD,
1684 .doit = nfc_genl_fw_download,
1685 .policy = nfc_genl_policy,
1686 },
1687 {
1688 .cmd = NFC_CMD_ENABLE_SE,
1689 .doit = nfc_genl_enable_se,
1690 .policy = nfc_genl_policy,
1691 },
1692 {
1693 .cmd = NFC_CMD_DISABLE_SE,
1694 .doit = nfc_genl_disable_se,
1695 .policy = nfc_genl_policy,
1696 },
1697 {
1698 .cmd = NFC_CMD_GET_SE,
1699 .dumpit = nfc_genl_dump_ses,
1700 .done = nfc_genl_dump_ses_done,
1701 .policy = nfc_genl_policy,
1702 },
1703 {
1704 .cmd = NFC_CMD_SE_IO,
1705 .doit = nfc_genl_se_io,
1706 .policy = nfc_genl_policy,
1707 },
1708 {
1709 .cmd = NFC_CMD_ACTIVATE_TARGET,
1710 .doit = nfc_genl_activate_target,
1711 .policy = nfc_genl_policy,
1712 },
1713 {
1714 .cmd = NFC_CMD_VENDOR,
1715 .doit = nfc_genl_vendor_cmd,
1716 .policy = nfc_genl_policy,
1717 },
1718 };
1719
1720
1721 struct urelease_work {
1722 struct work_struct w;
1723 u32 portid;
1724 };
1725
1726 static void nfc_urelease_event_work(struct work_struct *work)
1727 {
1728 struct urelease_work *w = container_of(work, struct urelease_work, w);
1729 struct class_dev_iter iter;
1730 struct nfc_dev *dev;
1731
1732 pr_debug("portid %d\n", w->portid);
1733
1734 mutex_lock(&nfc_devlist_mutex);
1735
1736 nfc_device_iter_init(&iter);
1737 dev = nfc_device_iter_next(&iter);
1738
1739 while (dev) {
1740 mutex_lock(&dev->genl_data.genl_data_mutex);
1741
1742 if (dev->genl_data.poll_req_portid == w->portid) {
1743 nfc_stop_poll(dev);
1744 dev->genl_data.poll_req_portid = 0;
1745 }
1746
1747 mutex_unlock(&dev->genl_data.genl_data_mutex);
1748
1749 dev = nfc_device_iter_next(&iter);
1750 }
1751
1752 nfc_device_iter_exit(&iter);
1753
1754 mutex_unlock(&nfc_devlist_mutex);
1755
1756 kfree(w);
1757 }
1758
1759 static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1760 unsigned long event, void *ptr)
1761 {
1762 struct netlink_notify *n = ptr;
1763 struct urelease_work *w;
1764
1765 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1766 goto out;
1767
1768 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
1769
1770 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1771 if (w) {
1772 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
1773 w->portid = n->portid;
1774 schedule_work((struct work_struct *) w);
1775 }
1776
1777 out:
1778 return NOTIFY_DONE;
1779 }
1780
1781 void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1782 {
1783 genl_data->poll_req_portid = 0;
1784 mutex_init(&genl_data->genl_data_mutex);
1785 }
1786
1787 void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1788 {
1789 mutex_destroy(&genl_data->genl_data_mutex);
1790 }
1791
1792 static struct notifier_block nl_notifier = {
1793 .notifier_call = nfc_genl_rcv_nl_event,
1794 };
1795
1796 /**
1797 * nfc_genl_init() - Initialize netlink interface
1798 *
1799 * This initialization function registers the nfc netlink family.
1800 */
1801 int __init nfc_genl_init(void)
1802 {
1803 int rc;
1804
1805 rc = genl_register_family_with_ops_groups(&nfc_genl_family,
1806 nfc_genl_ops,
1807 nfc_genl_mcgrps);
1808 if (rc)
1809 return rc;
1810
1811 netlink_register_notifier(&nl_notifier);
1812
1813 return 0;
1814 }
1815
1816 /**
1817 * nfc_genl_exit() - Deinitialize netlink interface
1818 *
1819 * This exit function unregisters the nfc netlink family.
1820 */
1821 void nfc_genl_exit(void)
1822 {
1823 netlink_unregister_notifier(&nl_notifier);
1824 genl_unregister_family(&nfc_genl_family);
1825 }
(deprecated) Btrfs devel tree