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Merge tag 'befs-v4.10-rc1' of git://github.com/luisbg/linux-befs
[mirror_ubuntu-zesty-kernel.git] / net / nfc / netlink.c
CommitLineData
4d12b8b1
LRV		 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 *
9e58095f
SO		 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 *
4d12b8b1
LRV		 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
98b32dec 25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
4d12b8b1
LRV		 26 */
27
52858b51 28#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
20c239c1 29
4d12b8b1
LRV		 30#include <net/genetlink.h>
31#include <linux/nfc.h>
32#include <linux/slab.h>
33
34#include "nfc.h"
30cc4587 35#include "llcp.h"
52feb444 36
2a94fe48
JB		 37static const struct genl_multicast_group nfc_genl_mcgrps[] = {
38 { .name = NFC_GENL_MCAST_EVENT_NAME, },
4d12b8b1
LRV		 39};
40
489111e5 41static struct genl_family nfc_genl_family;
4d12b8b1
LRV		 42static 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 },
1ed28f61
SO		 47 [NFC_ATTR_COMM_MODE] = { .type = NLA_U8 },
48 [NFC_ATTR_RF_MODE] = { .type = NLA_U8 },
c970a1ac 49 [NFC_ATTR_DEVICE_POWERED] = { .type = NLA_U8 },
fe7c5800
SO		 50 [NFC_ATTR_IM_PROTOCOLS] = { .type = NLA_U32 },
51 [NFC_ATTR_TM_PROTOCOLS] = { .type = NLA_U32 },
8af362d1
TE		 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 },
d9b8d8e1 55 [NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
9674da87
EL		 56 [NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
57 .len = NFC_FIRMWARE_NAME_MAXSIZE },
5ce3f32b 58 [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
29e76924
CR		 59 [NFC_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
60
d9b8d8e1
TE		 61};
62
63static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
64 [NFC_SDP_ATTR_URI] = { .type = NLA_STRING },
65 [NFC_SDP_ATTR_SAP] = { .type = NLA_U8 },
4d12b8b1
LRV		 66};
67
68static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
0a40acb2 69 struct netlink_callback *cb, int flags)
4d12b8b1
LRV		 70{
71 void *hdr;
72
15e47304 73 hdr = genlmsg_put(msg, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
0a40acb2 74 &nfc_genl_family, flags, NFC_CMD_GET_TARGET);
4d12b8b1
LRV		 75 if (!hdr)
76 return -EMSGSIZE;
77
78 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
79
1e6428d8
DM		 80 if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
81 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
82 nla_put_u16(msg, NFC_ATTR_TARGET_SENS_RES, target->sens_res) ||
83 nla_put_u8(msg, NFC_ATTR_TARGET_SEL_RES, target->sel_res))
84 goto nla_put_failure;
85 if (target->nfcid1_len > 0 &&
86 nla_put(msg, NFC_ATTR_TARGET_NFCID1, target->nfcid1_len,
87 target->nfcid1))
88 goto nla_put_failure;
89 if (target->sensb_res_len > 0 &&
90 nla_put(msg, NFC_ATTR_TARGET_SENSB_RES, target->sensb_res_len,
91 target->sensb_res))
92 goto nla_put_failure;
93 if (target->sensf_res_len > 0 &&
94 nla_put(msg, NFC_ATTR_TARGET_SENSF_RES, target->sensf_res_len,
95 target->sensf_res))
96 goto nla_put_failure;
4d12b8b1 97
f5f6872e
MG		 98 if (target->is_iso15693) {
99 if (nla_put_u8(msg, NFC_ATTR_TARGET_ISO15693_DSFID,
100 target->iso15693_dsfid) ||
101 nla_put(msg, NFC_ATTR_TARGET_ISO15693_UID,
102 sizeof(target->iso15693_uid), target->iso15693_uid))
103 goto nla_put_failure;
104 }
105
053c095a
JB		 106 genlmsg_end(msg, hdr);
107 return 0;
4d12b8b1
LRV		 108
109nla_put_failure:
110 genlmsg_cancel(msg, hdr);
111 return -EMSGSIZE;
112}
113
114static struct nfc_dev *__get_device_from_cb(struct netlink_callback *cb)
115{
c90c39da 116 struct nlattr **attrbuf = genl_family_attrbuf(&nfc_genl_family);
4d12b8b1
LRV		 117 struct nfc_dev *dev;
118 int rc;
119 u32 idx;
120
121 rc = nlmsg_parse(cb->nlh, GENL_HDRLEN + nfc_genl_family.hdrsize,
c90c39da 122 attrbuf, nfc_genl_family.maxattr, nfc_genl_policy);
4d12b8b1
LRV		 123 if (rc < 0)
124 return ERR_PTR(rc);
125
c90c39da 126 if (!attrbuf[NFC_ATTR_DEVICE_INDEX])
4d12b8b1
LRV		 127 return ERR_PTR(-EINVAL);
128
c90c39da 129 idx = nla_get_u32(attrbuf[NFC_ATTR_DEVICE_INDEX]);
4d12b8b1
LRV		 130
131 dev = nfc_get_device(idx);
132 if (!dev)
133 return ERR_PTR(-ENODEV);
134
135 return dev;
136}
137
138static int nfc_genl_dump_targets(struct sk_buff *skb,
0a40acb2 139 struct netlink_callback *cb)
4d12b8b1
LRV		 140{
141 int i = cb->args[0];
142 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
143 int rc;
144
4d12b8b1
LRV		 145 if (!dev) {
146 dev = __get_device_from_cb(cb);
147 if (IS_ERR(dev))
148 return PTR_ERR(dev);
149
150 cb->args[1] = (long) dev;
151 }
152
d4ccb132 153 device_lock(&dev->dev);
4d12b8b1
LRV		 154
155 cb->seq = dev->targets_generation;
156
157 while (i < dev->n_targets) {
158 rc = nfc_genl_send_target(skb, &dev->targets[i], cb,
0a40acb2 159 NLM_F_MULTI);
4d12b8b1
LRV		 160 if (rc < 0)
161 break;
162
163 i++;
164 }
165
d4ccb132 166 device_unlock(&dev->dev);
4d12b8b1
LRV		 167
168 cb->args[0] = i;
169
170 return skb->len;
171}
172
173static int nfc_genl_dump_targets_done(struct netlink_callback *cb)
174{
175 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
176
4d12b8b1
LRV		 177 if (dev)
178 nfc_put_device(dev);
179
180 return 0;
181}
182
183int nfc_genl_targets_found(struct nfc_dev *dev)
184{
185 struct sk_buff *msg;
186 void *hdr;
187
15e47304 188 dev->genl_data.poll_req_portid = 0;
4d12b8b1 189
58050fce 190 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4d12b8b1
LRV		 191 if (!msg)
192 return -ENOMEM;
193
194 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 195 NFC_EVENT_TARGETS_FOUND);
4d12b8b1
LRV		 196 if (!hdr)
197 goto free_msg;
198
1e6428d8
DM		 199 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
200 goto nla_put_failure;
4d12b8b1
LRV		 201
202 genlmsg_end(msg, hdr);
203
2a94fe48 204 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
4d12b8b1
LRV		 205
206nla_put_failure:
207 genlmsg_cancel(msg, hdr);
208free_msg:
209 nlmsg_free(msg);
210 return -EMSGSIZE;
211}
212
8112a5c9
SO		 213int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
214{
215 struct sk_buff *msg;
216 void *hdr;
217
58050fce 218 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8112a5c9
SO		 219 if (!msg)
220 return -ENOMEM;
221
222 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
223 NFC_EVENT_TARGET_LOST);
224 if (!hdr)
225 goto free_msg;
226
59ef43e6
JL		 227 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
228 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
229 goto nla_put_failure;
8112a5c9
SO		 230
231 genlmsg_end(msg, hdr);
232
2a94fe48 233 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
8112a5c9
SO		 234
235 return 0;
236
fc40a8c1
SO		 237nla_put_failure:
238 genlmsg_cancel(msg, hdr);
239free_msg:
240 nlmsg_free(msg);
241 return -EMSGSIZE;
242}
243
244int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
245{
246 struct sk_buff *msg;
247 void *hdr;
248
58050fce 249 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
fc40a8c1
SO		 250 if (!msg)
251 return -ENOMEM;
252
253 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
254 NFC_EVENT_TM_ACTIVATED);
255 if (!hdr)
256 goto free_msg;
257
258 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
259 goto nla_put_failure;
260 if (nla_put_u32(msg, NFC_ATTR_TM_PROTOCOLS, protocol))
261 goto nla_put_failure;
262
263 genlmsg_end(msg, hdr);
264
2a94fe48 265 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
fc40a8c1
SO		 266
267 return 0;
268
269nla_put_failure:
270 genlmsg_cancel(msg, hdr);
271free_msg:
272 nlmsg_free(msg);
273 return -EMSGSIZE;
274}
275
276int nfc_genl_tm_deactivated(struct nfc_dev *dev)
277{
278 struct sk_buff *msg;
279 void *hdr;
280
58050fce 281 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
fc40a8c1
SO		 282 if (!msg)
283 return -ENOMEM;
284
285 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
286 NFC_EVENT_TM_DEACTIVATED);
287 if (!hdr)
288 goto free_msg;
289
290 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
291 goto nla_put_failure;
292
293 genlmsg_end(msg, hdr);
294
2a94fe48 295 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
fc40a8c1
SO		 296
297 return 0;
298
8112a5c9
SO		 299nla_put_failure:
300 genlmsg_cancel(msg, hdr);
301free_msg:
302 nlmsg_free(msg);
303 return -EMSGSIZE;
304}
305
4d12b8b1
LRV		 306int nfc_genl_device_added(struct nfc_dev *dev)
307{
308 struct sk_buff *msg;
309 void *hdr;
310
58050fce 311 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4d12b8b1
LRV		 312 if (!msg)
313 return -ENOMEM;
314
315 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 316 NFC_EVENT_DEVICE_ADDED);
4d12b8b1
LRV		 317 if (!hdr)
318 goto free_msg;
319
1e6428d8
DM		 320 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
321 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
322 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
323 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up))
324 goto nla_put_failure;
4d12b8b1
LRV		 325
326 genlmsg_end(msg, hdr);
327
2a94fe48 328 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
4d12b8b1
LRV		 329
330 return 0;
331
332nla_put_failure:
333 genlmsg_cancel(msg, hdr);
334free_msg:
335 nlmsg_free(msg);
336 return -EMSGSIZE;
337}
338
339int nfc_genl_device_removed(struct nfc_dev *dev)
340{
341 struct sk_buff *msg;
342 void *hdr;
343
58050fce 344 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4d12b8b1
LRV		 345 if (!msg)
346 return -ENOMEM;
347
348 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 349 NFC_EVENT_DEVICE_REMOVED);
4d12b8b1
LRV		 350 if (!hdr)
351 goto free_msg;
352
1e6428d8
DM		 353 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
354 goto nla_put_failure;
4d12b8b1
LRV		 355
356 genlmsg_end(msg, hdr);
357
2a94fe48 358 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
4d12b8b1
LRV		 359
360 return 0;
361
362nla_put_failure:
363 genlmsg_cancel(msg, hdr);
364free_msg:
365 nlmsg_free(msg);
366 return -EMSGSIZE;
367}
368
d9b8d8e1
TE		 369int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
370{
371 struct sk_buff *msg;
372 struct nlattr *sdp_attr, *uri_attr;
373 struct nfc_llcp_sdp_tlv *sdres;
374 struct hlist_node *n;
375 void *hdr;
376 int rc = -EMSGSIZE;
377 int i;
378
379 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
380 if (!msg)
381 return -ENOMEM;
382
383 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
384 NFC_EVENT_LLC_SDRES);
385 if (!hdr)
386 goto free_msg;
387
388 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
389 goto nla_put_failure;
390
391 sdp_attr = nla_nest_start(msg, NFC_ATTR_LLC_SDP);
392 if (sdp_attr == NULL) {
393 rc = -ENOMEM;
394 goto nla_put_failure;
395 }
396
397 i = 1;
398 hlist_for_each_entry_safe(sdres, n, sdres_list, node) {
399 pr_debug("uri: %s, sap: %d\n", sdres->uri, sdres->sap);
400
401 uri_attr = nla_nest_start(msg, i++);
402 if (uri_attr == NULL) {
403 rc = -ENOMEM;
404 goto nla_put_failure;
405 }
406
407 if (nla_put_u8(msg, NFC_SDP_ATTR_SAP, sdres->sap))
408 goto nla_put_failure;
409
410 if (nla_put_string(msg, NFC_SDP_ATTR_URI, sdres->uri))
411 goto nla_put_failure;
412
413 nla_nest_end(msg, uri_attr);
414
415 hlist_del(&sdres->node);
416
417 nfc_llcp_free_sdp_tlv(sdres);
418 }
419
420 nla_nest_end(msg, sdp_attr);
421
422 genlmsg_end(msg, hdr);
423
2a94fe48 424 return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
d9b8d8e1
TE		 425
426nla_put_failure:
427 genlmsg_cancel(msg, hdr);
428
429free_msg:
430 nlmsg_free(msg);
431
432 nfc_llcp_free_sdp_tlv_list(sdres_list);
433
434 return rc;
435}
436
2757c372
SO		 437int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
438{
439 struct sk_buff *msg;
440 void *hdr;
441
442 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
443 if (!msg)
444 return -ENOMEM;
445
446 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
447 NFC_EVENT_SE_ADDED);
448 if (!hdr)
449 goto free_msg;
450
451 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
452 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
453 nla_put_u8(msg, NFC_ATTR_SE_TYPE, type))
454 goto nla_put_failure;
455
456 genlmsg_end(msg, hdr);
457
2a94fe48 458 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
2757c372
SO		 459
460 return 0;
461
462nla_put_failure:
463 genlmsg_cancel(msg, hdr);
464free_msg:
465 nlmsg_free(msg);
466 return -EMSGSIZE;
467}
468
469int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
470{
471 struct sk_buff *msg;
472 void *hdr;
473
474 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
475 if (!msg)
476 return -ENOMEM;
477
478 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
479 NFC_EVENT_SE_REMOVED);
480 if (!hdr)
481 goto free_msg;
482
483 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
484 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx))
485 goto nla_put_failure;
486
487 genlmsg_end(msg, hdr);
488
2a94fe48 489 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
2757c372
SO		 490
491 return 0;
492
493nla_put_failure:
494 genlmsg_cancel(msg, hdr);
495free_msg:
496 nlmsg_free(msg);
497 return -EMSGSIZE;
498}
499
447b27c4
CR		 500int nfc_genl_se_transaction(struct nfc_dev *dev, u8 se_idx,
501 struct nfc_evt_transaction *evt_transaction)
502{
503 struct nfc_se *se;
504 struct sk_buff *msg;
505 void *hdr;
506
507 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
508 if (!msg)
509 return -ENOMEM;
510
511 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
512 NFC_EVENT_SE_TRANSACTION);
513 if (!hdr)
514 goto free_msg;
515
516 se = nfc_find_se(dev, se_idx);
517 if (!se)
518 goto free_msg;
519
520 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
521 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
522 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type) ||
523 nla_put(msg, NFC_ATTR_SE_AID, evt_transaction->aid_len,
524 evt_transaction->aid) ||
525 nla_put(msg, NFC_ATTR_SE_PARAMS, evt_transaction->params_len,
526 evt_transaction->params))
527 goto nla_put_failure;
528
529 /* evt_transaction is no more used */
530 devm_kfree(&dev->dev, evt_transaction);
531
532 genlmsg_end(msg, hdr);
533
534 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
535
536 return 0;
537
538nla_put_failure:
539 genlmsg_cancel(msg, hdr);
540free_msg:
541 /* evt_transaction is no more used */
542 devm_kfree(&dev->dev, evt_transaction);
543 nlmsg_free(msg);
544 return -EMSGSIZE;
545}
546
9afec6d3
CR		 547int nfc_genl_se_connectivity(struct nfc_dev *dev, u8 se_idx)
548{
549 struct nfc_se *se;
550 struct sk_buff *msg;
551 void *hdr;
552
553 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
554 if (!msg)
555 return -ENOMEM;
556
557 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
558 NFC_EVENT_SE_CONNECTIVITY);
559 if (!hdr)
560 goto free_msg;
561
562 se = nfc_find_se(dev, se_idx);
563 if (!se)
564 goto free_msg;
565
566 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
567 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se_idx) ||
568 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
569 goto nla_put_failure;
570
571 genlmsg_end(msg, hdr);
572
573 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
574
575 return 0;
576
577nla_put_failure:
578 genlmsg_cancel(msg, hdr);
579free_msg:
580 nlmsg_free(msg);
581 return -EMSGSIZE;
582}
583
4d12b8b1 584static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
15e47304 585 u32 portid, u32 seq,
0a40acb2
SO		 586 struct netlink_callback *cb,
587 int flags)
4d12b8b1
LRV		 588{
589 void *hdr;
590
15e47304 591 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
0a40acb2 592 NFC_CMD_GET_DEVICE);
4d12b8b1
LRV		 593 if (!hdr)
594 return -EMSGSIZE;
595
596 if (cb)
597 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
598
1e6428d8
DM		 599 if (nla_put_string(msg, NFC_ATTR_DEVICE_NAME, nfc_device_name(dev)) ||
600 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
601 nla_put_u32(msg, NFC_ATTR_PROTOCOLS, dev->supported_protocols) ||
7ad39395
TE		 602 nla_put_u8(msg, NFC_ATTR_DEVICE_POWERED, dev->dev_up) ||
603 nla_put_u8(msg, NFC_ATTR_RF_MODE, dev->rf_mode))
1e6428d8 604 goto nla_put_failure;
4d12b8b1 605
053c095a
JB		 606 genlmsg_end(msg, hdr);
607 return 0;
4d12b8b1
LRV		 608
609nla_put_failure:
610 genlmsg_cancel(msg, hdr);
611 return -EMSGSIZE;
612}
613
614static int nfc_genl_dump_devices(struct sk_buff *skb,
0a40acb2 615 struct netlink_callback *cb)
4d12b8b1
LRV		 616{
617 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
618 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
619 bool first_call = false;
620
4d12b8b1
LRV		 621 if (!iter) {
622 first_call = true;
623 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
624 if (!iter)
625 return -ENOMEM;
626 cb->args[0] = (long) iter;
627 }
628
629 mutex_lock(&nfc_devlist_mutex);
630
631 cb->seq = nfc_devlist_generation;
632
633 if (first_call) {
634 nfc_device_iter_init(iter);
635 dev = nfc_device_iter_next(iter);
636 }
637
638 while (dev) {
639 int rc;
640
15e47304 641 rc = nfc_genl_send_device(skb, dev, NETLINK_CB(cb->skb).portid,
0a40acb2 642 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
4d12b8b1
LRV		 643 if (rc < 0)
644 break;
645
646 dev = nfc_device_iter_next(iter);
647 }
648
649 mutex_unlock(&nfc_devlist_mutex);
650
651 cb->args[1] = (long) dev;
652
653 return skb->len;
654}
655
656static int nfc_genl_dump_devices_done(struct netlink_callback *cb)
657{
658 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
659
4d12b8b1
LRV		 660 nfc_device_iter_exit(iter);
661 kfree(iter);
662
663 return 0;
664}
665
1ed28f61 666int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
0a40acb2 667 u8 comm_mode, u8 rf_mode)
1ed28f61
SO		 668{
669 struct sk_buff *msg;
670 void *hdr;
671
672 pr_debug("DEP link is up\n");
673
58050fce 674 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1ed28f61
SO		 675 if (!msg)
676 return -ENOMEM;
677
0a40acb2 678 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0, NFC_CMD_DEP_LINK_UP);
1ed28f61
SO		 679 if (!hdr)
680 goto free_msg;
681
1e6428d8
DM		 682 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
683 goto nla_put_failure;
684 if (rf_mode == NFC_RF_INITIATOR &&
685 nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target_idx))
686 goto nla_put_failure;
687 if (nla_put_u8(msg, NFC_ATTR_COMM_MODE, comm_mode) ||
688 nla_put_u8(msg, NFC_ATTR_RF_MODE, rf_mode))
689 goto nla_put_failure;
1ed28f61
SO		 690
691 genlmsg_end(msg, hdr);
692
693 dev->dep_link_up = true;
694
2a94fe48 695 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
1ed28f61
SO		 696
697 return 0;
698
699nla_put_failure:
700 genlmsg_cancel(msg, hdr);
701free_msg:
702 nlmsg_free(msg);
703 return -EMSGSIZE;
704}
705
706int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
707{
708 struct sk_buff *msg;
709 void *hdr;
710
711 pr_debug("DEP link is down\n");
712
58050fce 713 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1ed28f61
SO		 714 if (!msg)
715 return -ENOMEM;
716
717 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
0a40acb2 718 NFC_CMD_DEP_LINK_DOWN);
1ed28f61
SO		 719 if (!hdr)
720 goto free_msg;
721
1e6428d8
DM		 722 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
723 goto nla_put_failure;
1ed28f61
SO		 724
725 genlmsg_end(msg, hdr);
726
2a94fe48 727 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
1ed28f61
SO		 728
729 return 0;
730
731nla_put_failure:
732 genlmsg_cancel(msg, hdr);
733free_msg:
734 nlmsg_free(msg);
735 return -EMSGSIZE;
736}
737
4d12b8b1
LRV		 738static int nfc_genl_get_device(struct sk_buff *skb, struct genl_info *info)
739{
740 struct sk_buff *msg;
741 struct nfc_dev *dev;
742 u32 idx;
743 int rc = -ENOBUFS;
744
4d12b8b1
LRV		 745 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
746 return -EINVAL;
747
748 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
749
750 dev = nfc_get_device(idx);
751 if (!dev)
752 return -ENODEV;
753
58050fce 754 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4d12b8b1
LRV		 755 if (!msg) {
756 rc = -ENOMEM;
757 goto out_putdev;
758 }
759
15e47304 760 rc = nfc_genl_send_device(msg, dev, info->snd_portid, info->snd_seq,
0a40acb2 761 NULL, 0);
4d12b8b1
LRV		 762 if (rc < 0)
763 goto out_free;
764
765 nfc_put_device(dev);
766
767 return genlmsg_reply(msg, info);
768
769out_free:
770 nlmsg_free(msg);
771out_putdev:
772 nfc_put_device(dev);
773 return rc;
774}
775
8b3fe7b5
IE		 776static int nfc_genl_dev_up(struct sk_buff *skb, struct genl_info *info)
777{
778 struct nfc_dev *dev;
779 int rc;
780 u32 idx;
781
8b3fe7b5
IE		 782 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
783 return -EINVAL;
784
785 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
786
787 dev = nfc_get_device(idx);
788 if (!dev)
789 return -ENODEV;
790
791 rc = nfc_dev_up(dev);
792
793 nfc_put_device(dev);
794 return rc;
795}
796
797static int nfc_genl_dev_down(struct sk_buff *skb, struct genl_info *info)
798{
799 struct nfc_dev *dev;
800 int rc;
801 u32 idx;
802
8b3fe7b5
IE		 803 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
804 return -EINVAL;
805
806 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
807
808 dev = nfc_get_device(idx);
809 if (!dev)
810 return -ENODEV;
811
812 rc = nfc_dev_down(dev);
813
814 nfc_put_device(dev);
815 return rc;
816}
817
4d12b8b1
LRV		 818static int nfc_genl_start_poll(struct sk_buff *skb, struct genl_info *info)
819{
820 struct nfc_dev *dev;
821 int rc;
822 u32 idx;
fe7c5800 823 u32 im_protocols = 0, tm_protocols = 0;
4d12b8b1 824
1ed28f61
SO		 825 pr_debug("Poll start\n");
826
4d12b8b1 827 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
fe7c5800
SO		 828 ((!info->attrs[NFC_ATTR_IM_PROTOCOLS] &&
829 !info->attrs[NFC_ATTR_PROTOCOLS]) &&
0f450772 830 !info->attrs[NFC_ATTR_TM_PROTOCOLS]))
4d12b8b1
LRV		 831 return -EINVAL;
832
833 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
fe7c5800
SO		 834
835 if (info->attrs[NFC_ATTR_TM_PROTOCOLS])
836 tm_protocols = nla_get_u32(info->attrs[NFC_ATTR_TM_PROTOCOLS]);
fe7c5800
SO		 837
838 if (info->attrs[NFC_ATTR_IM_PROTOCOLS])
839 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_IM_PROTOCOLS]);
5e50ee3a
SO		 840 else if (info->attrs[NFC_ATTR_PROTOCOLS])
841 im_protocols = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
4d12b8b1
LRV		 842
843 dev = nfc_get_device(idx);
844 if (!dev)
845 return -ENODEV;
846
847 mutex_lock(&dev->genl_data.genl_data_mutex);
848
fe7c5800 849 rc = nfc_start_poll(dev, im_protocols, tm_protocols);
4d12b8b1 850 if (!rc)
15e47304 851 dev->genl_data.poll_req_portid = info->snd_portid;
4d12b8b1
LRV		 852
853 mutex_unlock(&dev->genl_data.genl_data_mutex);
854
855 nfc_put_device(dev);
856 return rc;
857}
858
859static int nfc_genl_stop_poll(struct sk_buff *skb, struct genl_info *info)
860{
861 struct nfc_dev *dev;
862 int rc;
863 u32 idx;
864
4d12b8b1
LRV		 865 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
866 return -EINVAL;
867
868 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
869
870 dev = nfc_get_device(idx);
871 if (!dev)
872 return -ENODEV;
873
a831b913
SO		 874 device_lock(&dev->dev);
875
876 if (!dev->polling) {
877 device_unlock(&dev->dev);
878 return -EINVAL;
879 }
880
881 device_unlock(&dev->dev);
882
4d12b8b1
LRV		 883 mutex_lock(&dev->genl_data.genl_data_mutex);
884
15e47304 885 if (dev->genl_data.poll_req_portid != info->snd_portid) {
4d12b8b1
LRV		 886 rc = -EBUSY;
887 goto out;
888 }
889
890 rc = nfc_stop_poll(dev);
15e47304 891 dev->genl_data.poll_req_portid = 0;
4d12b8b1
LRV		 892
893out:
894 mutex_unlock(&dev->genl_data.genl_data_mutex);
895 nfc_put_device(dev);
896 return rc;
897}
898
3682f49f
CR		 899static int nfc_genl_activate_target(struct sk_buff *skb, struct genl_info *info)
900{
901 struct nfc_dev *dev;
902 u32 device_idx, target_idx, protocol;
903 int rc;
904
905 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
906 return -EINVAL;
907
908 device_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
909
910 dev = nfc_get_device(device_idx);
911 if (!dev)
912 return -ENODEV;
913
914 target_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
915 protocol = nla_get_u32(info->attrs[NFC_ATTR_PROTOCOLS]);
916
96d4581f 917 nfc_deactivate_target(dev, target_idx, NFC_TARGET_MODE_SLEEP);
3682f49f
CR		 918 rc = nfc_activate_target(dev, target_idx, protocol);
919
920 nfc_put_device(dev);
921 return 0;
922}
923
1ed28f61
SO		 924static int nfc_genl_dep_link_up(struct sk_buff *skb, struct genl_info *info)
925{
926 struct nfc_dev *dev;
927 int rc, tgt_idx;
928 u32 idx;
47807d3d 929 u8 comm;
1ed28f61
SO		 930
931 pr_debug("DEP link up\n");
932
933 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
47807d3d 934 !info->attrs[NFC_ATTR_COMM_MODE])
1ed28f61
SO		 935 return -EINVAL;
936
937 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
938 if (!info->attrs[NFC_ATTR_TARGET_INDEX])
939 tgt_idx = NFC_TARGET_IDX_ANY;
940 else
941 tgt_idx = nla_get_u32(info->attrs[NFC_ATTR_TARGET_INDEX]);
942
943 comm = nla_get_u8(info->attrs[NFC_ATTR_COMM_MODE]);
1ed28f61
SO		 944
945 if (comm != NFC_COMM_ACTIVE && comm != NFC_COMM_PASSIVE)
946 return -EINVAL;
947
1ed28f61
SO		 948 dev = nfc_get_device(idx);
949 if (!dev)
950 return -ENODEV;
951
47807d3d 952 rc = nfc_dep_link_up(dev, tgt_idx, comm);
1ed28f61
SO		 953
954 nfc_put_device(dev);
955
956 return rc;
957}
958
959static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
960{
961 struct nfc_dev *dev;
962 int rc;
963 u32 idx;
964
965 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
966 return -EINVAL;
967
968 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
969
970 dev = nfc_get_device(idx);
971 if (!dev)
972 return -ENODEV;
973
974 rc = nfc_dep_link_down(dev);
975
976 nfc_put_device(dev);
977 return rc;
978}
979
52feb444
TE		 980static int nfc_genl_send_params(struct sk_buff *msg,
981 struct nfc_llcp_local *local,
982 u32 portid, u32 seq)
983{
984 void *hdr;
985
986 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, 0,
987 NFC_CMD_LLC_GET_PARAMS);
988 if (!hdr)
989 return -EMSGSIZE;
990
991 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, local->dev->idx) ||
992 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_LTO, local->lto) ||
993 nla_put_u8(msg, NFC_ATTR_LLC_PARAM_RW, local->rw) ||
994 nla_put_u16(msg, NFC_ATTR_LLC_PARAM_MIUX, be16_to_cpu(local->miux)))
995 goto nla_put_failure;
996
053c095a
JB		 997 genlmsg_end(msg, hdr);
998 return 0;
52feb444
TE		 999
1000nla_put_failure:
1001
1002 genlmsg_cancel(msg, hdr);
1003 return -EMSGSIZE;
1004}
1005
1006static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
1007{
1008 struct nfc_dev *dev;
1009 struct nfc_llcp_local *local;
1010 int rc = 0;
1011 struct sk_buff *msg = NULL;
1012 u32 idx;
1013
1014 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1015 return -EINVAL;
1016
1017 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1018
1019 dev = nfc_get_device(idx);
1020 if (!dev)
1021 return -ENODEV;
1022
1023 device_lock(&dev->dev);
1024
1025 local = nfc_llcp_find_local(dev);
1026 if (!local) {
1027 rc = -ENODEV;
1028 goto exit;
1029 }
1030
1031 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1032 if (!msg) {
1033 rc = -ENOMEM;
1034 goto exit;
1035 }
1036
1037 rc = nfc_genl_send_params(msg, local, info->snd_portid, info->snd_seq);
1038
1039exit:
1040 device_unlock(&dev->dev);
1041
1042 nfc_put_device(dev);
1043
1044 if (rc < 0) {
1045 if (msg)
1046 nlmsg_free(msg);
1047
1048 return rc;
1049 }
1050
1051 return genlmsg_reply(msg, info);
1052}
1053
1054static int nfc_genl_llc_set_params(struct sk_buff *skb, struct genl_info *info)
1055{
1056 struct nfc_dev *dev;
1057 struct nfc_llcp_local *local;
1058 u8 rw = 0;
1059 u16 miux = 0;
1060 u32 idx;
1061 int rc = 0;
1062
1063 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1064 (!info->attrs[NFC_ATTR_LLC_PARAM_LTO] &&
1065 !info->attrs[NFC_ATTR_LLC_PARAM_RW] &&
1066 !info->attrs[NFC_ATTR_LLC_PARAM_MIUX]))
1067 return -EINVAL;
1068
1069 if (info->attrs[NFC_ATTR_LLC_PARAM_RW]) {
1070 rw = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_RW]);
1071
1072 if (rw > LLCP_MAX_RW)
1073 return -EINVAL;
1074 }
1075
1076 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX]) {
1077 miux = nla_get_u16(info->attrs[NFC_ATTR_LLC_PARAM_MIUX]);
1078
1079 if (miux > LLCP_MAX_MIUX)
1080 return -EINVAL;
1081 }
1082
1083 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1084
1085 dev = nfc_get_device(idx);
1086 if (!dev)
1087 return -ENODEV;
1088
1089 device_lock(&dev->dev);
1090
1091 local = nfc_llcp_find_local(dev);
1092 if (!local) {
1093 nfc_put_device(dev);
1094 rc = -ENODEV;
1095 goto exit;
1096 }
1097
1098 if (info->attrs[NFC_ATTR_LLC_PARAM_LTO]) {
1099 if (dev->dep_link_up) {
1100 rc = -EINPROGRESS;
1101 goto exit;
1102 }
1103
1104 local->lto = nla_get_u8(info->attrs[NFC_ATTR_LLC_PARAM_LTO]);
1105 }
1106
1107 if (info->attrs[NFC_ATTR_LLC_PARAM_RW])
1108 local->rw = rw;
1109
1110 if (info->attrs[NFC_ATTR_LLC_PARAM_MIUX])
1111 local->miux = cpu_to_be16(miux);
1112
1113exit:
1114 device_unlock(&dev->dev);
1115
1116 nfc_put_device(dev);
1117
1118 return rc;
1119}
1120
d9b8d8e1
TE		 1121static int nfc_genl_llc_sdreq(struct sk_buff *skb, struct genl_info *info)
1122{
1123 struct nfc_dev *dev;
1124 struct nfc_llcp_local *local;
1125 struct nlattr *attr, *sdp_attrs[NFC_SDP_ATTR_MAX+1];
1126 u32 idx;
1127 u8 tid;
1128 char *uri;
1129 int rc = 0, rem;
1130 size_t uri_len, tlvs_len;
1131 struct hlist_head sdreq_list;
1132 struct nfc_llcp_sdp_tlv *sdreq;
1133
1134 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1135 !info->attrs[NFC_ATTR_LLC_SDP])
1136 return -EINVAL;
1137
1138 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1139
1140 dev = nfc_get_device(idx);
9abebb8a
JL		 1141 if (!dev)
1142 return -ENODEV;
d9b8d8e1
TE		 1143
1144 device_lock(&dev->dev);
1145
1146 if (dev->dep_link_up == false) {
1147 rc = -ENOLINK;
1148 goto exit;
1149 }
1150
1151 local = nfc_llcp_find_local(dev);
1152 if (!local) {
1153 nfc_put_device(dev);
1154 rc = -ENODEV;
1155 goto exit;
1156 }
1157
1158 INIT_HLIST_HEAD(&sdreq_list);
1159
1160 tlvs_len = 0;
1161
1162 nla_for_each_nested(attr, info->attrs[NFC_ATTR_LLC_SDP], rem) {
1163 rc = nla_parse_nested(sdp_attrs, NFC_SDP_ATTR_MAX, attr,
1164 nfc_sdp_genl_policy);
1165
1166 if (rc != 0) {
1167 rc = -EINVAL;
1168 goto exit;
1169 }
1170
1171 if (!sdp_attrs[NFC_SDP_ATTR_URI])
1172 continue;
1173
1174 uri_len = nla_len(sdp_attrs[NFC_SDP_ATTR_URI]);
1175 if (uri_len == 0)
1176 continue;
1177
1178 uri = nla_data(sdp_attrs[NFC_SDP_ATTR_URI]);
1179 if (uri == NULL || *uri == 0)
1180 continue;
1181
1182 tid = local->sdreq_next_tid++;
1183
1184 sdreq = nfc_llcp_build_sdreq_tlv(tid, uri, uri_len);
1185 if (sdreq == NULL) {
1186 rc = -ENOMEM;
1187 goto exit;
1188 }
1189
1190 tlvs_len += sdreq->tlv_len;
1191
1192 hlist_add_head(&sdreq->node, &sdreq_list);
1193 }
1194
1195 if (hlist_empty(&sdreq_list)) {
1196 rc = -EINVAL;
1197 goto exit;
1198 }
1199
1200 rc = nfc_llcp_send_snl_sdreq(local, &sdreq_list, tlvs_len);
1201exit:
1202 device_unlock(&dev->dev);
1203
1204 nfc_put_device(dev);
1205
1206 return rc;
1207}
1208
9ea7187c 1209static int nfc_genl_fw_download(struct sk_buff *skb, struct genl_info *info)
9674da87
EL		 1210{
1211 struct nfc_dev *dev;
1212 int rc;
1213 u32 idx;
1214 char firmware_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
1215
1216 if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
1217 return -EINVAL;
1218
1219 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1220
1221 dev = nfc_get_device(idx);
1222 if (!dev)
1223 return -ENODEV;
1224
1225 nla_strlcpy(firmware_name, info->attrs[NFC_ATTR_FIRMWARE_NAME],
1226 sizeof(firmware_name));
1227
9ea7187c 1228 rc = nfc_fw_download(dev, firmware_name);
9674da87
EL		 1229
1230 nfc_put_device(dev);
1231 return rc;
1232}
1233
352a5f5f
EL		 1234int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
1235 u32 result)
9674da87
EL		 1236{
1237 struct sk_buff *msg;
1238 void *hdr;
1239
1240 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1241 if (!msg)
1242 return -ENOMEM;
1243
1244 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
9ea7187c 1245 NFC_CMD_FW_DOWNLOAD);
9674da87
EL		 1246 if (!hdr)
1247 goto free_msg;
1248
1249 if (nla_put_string(msg, NFC_ATTR_FIRMWARE_NAME, firmware_name) ||
352a5f5f 1250 nla_put_u32(msg, NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS, result) ||
9674da87
EL		 1251 nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx))
1252 goto nla_put_failure;
1253
1254 genlmsg_end(msg, hdr);
1255
2a94fe48 1256 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
9674da87
EL		 1257
1258 return 0;
1259
1260nla_put_failure:
1261 genlmsg_cancel(msg, hdr);
1262free_msg:
1263 nlmsg_free(msg);
1264 return -EMSGSIZE;
1265}
1266
be085653
SO		 1267static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
1268{
1269 struct nfc_dev *dev;
1270 int rc;
1271 u32 idx, se_idx;
1272
1273 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1274 !info->attrs[NFC_ATTR_SE_INDEX])
1275 return -EINVAL;
1276
1277 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1278 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1279
1280 dev = nfc_get_device(idx);
1281 if (!dev)
1282 return -ENODEV;
1283
1284 rc = nfc_enable_se(dev, se_idx);
1285
1286 nfc_put_device(dev);
1287 return rc;
1288}
1289
1290static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
1291{
1292 struct nfc_dev *dev;
1293 int rc;
1294 u32 idx, se_idx;
1295
1296 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1297 !info->attrs[NFC_ATTR_SE_INDEX])
1298 return -EINVAL;
1299
1300 idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1301 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1302
1303 dev = nfc_get_device(idx);
1304 if (!dev)
1305 return -ENODEV;
1306
1307 rc = nfc_disable_se(dev, se_idx);
1308
1309 nfc_put_device(dev);
1310 return rc;
1311}
1312
ac22ac46
SO		 1313static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
1314 u32 portid, u32 seq,
1315 struct netlink_callback *cb,
1316 int flags)
1317{
1318 void *hdr;
1319 struct nfc_se *se, *n;
1320
1321 list_for_each_entry_safe(se, n, &dev->secure_elements, list) {
1322 hdr = genlmsg_put(msg, portid, seq, &nfc_genl_family, flags,
1323 NFC_CMD_GET_SE);
1324 if (!hdr)
1325 goto nla_put_failure;
1326
1327 if (cb)
1328 genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
1329
1330 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
1331 nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||
1332 nla_put_u8(msg, NFC_ATTR_SE_TYPE, se->type))
1333 goto nla_put_failure;
1334
053c095a 1335 genlmsg_end(msg, hdr);
ac22ac46
SO		 1336 }
1337
1338 return 0;
1339
1340nla_put_failure:
1341 genlmsg_cancel(msg, hdr);
1342 return -EMSGSIZE;
1343}
1344
1345static int nfc_genl_dump_ses(struct sk_buff *skb,
1346 struct netlink_callback *cb)
1347{
1348 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1349 struct nfc_dev *dev = (struct nfc_dev *) cb->args[1];
1350 bool first_call = false;
1351
1352 if (!iter) {
1353 first_call = true;
1354 iter = kmalloc(sizeof(struct class_dev_iter), GFP_KERNEL);
1355 if (!iter)
1356 return -ENOMEM;
1357 cb->args[0] = (long) iter;
1358 }
1359
1360 mutex_lock(&nfc_devlist_mutex);
1361
1362 cb->seq = nfc_devlist_generation;
1363
1364 if (first_call) {
1365 nfc_device_iter_init(iter);
1366 dev = nfc_device_iter_next(iter);
1367 }
1368
1369 while (dev) {
1370 int rc;
1371
1372 rc = nfc_genl_send_se(skb, dev, NETLINK_CB(cb->skb).portid,
1373 cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
1374 if (rc < 0)
1375 break;
1376
1377 dev = nfc_device_iter_next(iter);
1378 }
1379
1380 mutex_unlock(&nfc_devlist_mutex);
1381
1382 cb->args[1] = (long) dev;
1383
1384 return skb->len;
1385}
1386
1387static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
1388{
1389 struct class_dev_iter *iter = (struct class_dev_iter *) cb->args[0];
1390
1391 nfc_device_iter_exit(iter);
1392 kfree(iter);
1393
1394 return 0;
1395}
1396
cd96db6f
CR		 1397static int nfc_se_io(struct nfc_dev *dev, u32 se_idx,
1398 u8 *apdu, size_t apdu_length,
1399 se_io_cb_t cb, void *cb_context)
1400{
1401 struct nfc_se *se;
1402 int rc;
1403
1404 pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
1405
1406 device_lock(&dev->dev);
1407
1408 if (!device_is_registered(&dev->dev)) {
1409 rc = -ENODEV;
1410 goto error;
1411 }
1412
1413 if (!dev->dev_up) {
1414 rc = -ENODEV;
1415 goto error;
1416 }
1417
1418 if (!dev->ops->se_io) {
1419 rc = -EOPNOTSUPP;
1420 goto error;
1421 }
1422
1423 se = nfc_find_se(dev, se_idx);
1424 if (!se) {
1425 rc = -EINVAL;
1426 goto error;
1427 }
1428
1429 if (se->state != NFC_SE_ENABLED) {
1430 rc = -ENODEV;
1431 goto error;
1432 }
1433
1434 rc = dev->ops->se_io(dev, se_idx, apdu,
1435 apdu_length, cb, cb_context);
1436
1437error:
1438 device_unlock(&dev->dev);
1439 return rc;
1440}
1441
5ce3f32b
SO		 1442struct se_io_ctx {
1443 u32 dev_idx;
1444 u32 se_idx;
1445};
1446
ddc1a70b 1447static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
5ce3f32b
SO		 1448{
1449 struct se_io_ctx *ctx = context;
1450 struct sk_buff *msg;
1451 void *hdr;
1452
1453 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1454 if (!msg) {
1455 kfree(ctx);
1456 return;
1457 }
1458
1459 hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
1460 NFC_CMD_SE_IO);
1461 if (!hdr)
1462 goto free_msg;
1463
1464 if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
1465 nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
1466 nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
1467 goto nla_put_failure;
1468
1469 genlmsg_end(msg, hdr);
1470
2a94fe48 1471 genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
5ce3f32b
SO		 1472
1473 kfree(ctx);
1474
1475 return;
1476
1477nla_put_failure:
1478 genlmsg_cancel(msg, hdr);
1479free_msg:
1480 nlmsg_free(msg);
1481 kfree(ctx);
1482
1483 return;
1484}
1485
1486static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
1487{
1488 struct nfc_dev *dev;
1489 struct se_io_ctx *ctx;
1490 u32 dev_idx, se_idx;
1491 u8 *apdu;
1492 size_t apdu_len;
1493
1494 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1495 !info->attrs[NFC_ATTR_SE_INDEX] ||
1496 !info->attrs[NFC_ATTR_SE_APDU])
1497 return -EINVAL;
1498
1499 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1500 se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
1501
1502 dev = nfc_get_device(dev_idx);
1503 if (!dev)
1504 return -ENODEV;
1505
1506 if (!dev->ops || !dev->ops->se_io)
1507 return -ENOTSUPP;
1508
1509 apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
1510 if (apdu_len == 0)
1511 return -EINVAL;
1512
1513 apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
1514 if (!apdu)
1515 return -EINVAL;
1516
1517 ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
1518 if (!ctx)
1519 return -ENOMEM;
1520
1521 ctx->dev_idx = dev_idx;
1522 ctx->se_idx = se_idx;
1523
cd96db6f 1524 return nfc_se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
5ce3f32b
SO		 1525}
1526
9e58095f
SO		 1527static int nfc_genl_vendor_cmd(struct sk_buff *skb,
1528 struct genl_info *info)
1529{
1530 struct nfc_dev *dev;
1531 struct nfc_vendor_cmd *cmd;
1532 u32 dev_idx, vid, subcmd;
1533 u8 *data;
1534 size_t data_len;
29e76924 1535 int i, err;
9e58095f
SO		 1536
1537 if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
1538 !info->attrs[NFC_ATTR_VENDOR_ID] ||
1539 !info->attrs[NFC_ATTR_VENDOR_SUBCMD])
1540 return -EINVAL;
1541
1542 dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
1543 vid = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_ID]);
1544 subcmd = nla_get_u32(info->attrs[NFC_ATTR_VENDOR_SUBCMD]);
1545
1546 dev = nfc_get_device(dev_idx);
1547 if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
1548 return -ENODEV;
1549
fe202fe9
CR		 1550 if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
1551 data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
9e58095f
SO		 1552 data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
1553 if (data_len == 0)
1554 return -EINVAL;
1555 } else {
adca3c38 1556 data = NULL;
9e58095f
SO		 1557 data_len = 0;
1558 }
1559
1560 for (i = 0; i < dev->n_vendor_cmds; i++) {
1561 cmd = &dev->vendor_cmds[i];
1562
1563 if (cmd->vendor_id != vid || cmd->subcmd != subcmd)
1564 continue;
1565
29e76924
CR		 1566 dev->cur_cmd_info = info;
1567 err = cmd->doit(dev, data, data_len);
1568 dev->cur_cmd_info = NULL;
1569 return err;
9e58095f
SO		 1570 }
1571
1572 return -EOPNOTSUPP;
1573}
1574
29e76924
CR		 1575/* message building helper */
1576static inline void *nfc_hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
1577 int flags, u8 cmd)
1578{
1579 /* since there is no private header just add the generic one */
1580 return genlmsg_put(skb, portid, seq, &nfc_genl_family, flags, cmd);
1581}
1582
1583static struct sk_buff *
1584__nfc_alloc_vendor_cmd_skb(struct nfc_dev *dev, int approxlen,
1585 u32 portid, u32 seq,
1586 enum nfc_attrs attr,
1587 u32 oui, u32 subcmd, gfp_t gfp)
1588{
1589 struct sk_buff *skb;
1590 void *hdr;
1591
1592 skb = nlmsg_new(approxlen + 100, gfp);
1593 if (!skb)
1594 return NULL;
1595
1596 hdr = nfc_hdr_put(skb, portid, seq, 0, NFC_CMD_VENDOR);
1597 if (!hdr) {
1598 kfree_skb(skb);
1599 return NULL;
1600 }
1601
1602 if (nla_put_u32(skb, NFC_ATTR_DEVICE_INDEX, dev->idx))
1603 goto nla_put_failure;
1604 if (nla_put_u32(skb, NFC_ATTR_VENDOR_ID, oui))
1605 goto nla_put_failure;
1606 if (nla_put_u32(skb, NFC_ATTR_VENDOR_SUBCMD, subcmd))
1607 goto nla_put_failure;
1608
1609 ((void **)skb->cb)[0] = dev;
1610 ((void **)skb->cb)[1] = hdr;
1611
1612 return skb;
1613
1614nla_put_failure:
1615 kfree_skb(skb);
1616 return NULL;
1617}
1618
1619struct sk_buff *__nfc_alloc_vendor_cmd_reply_skb(struct nfc_dev *dev,
1620 enum nfc_attrs attr,
1621 u32 oui, u32 subcmd,
1622 int approxlen)
1623{
1624 if (WARN_ON(!dev->cur_cmd_info))
1625 return NULL;
1626
1627 return __nfc_alloc_vendor_cmd_skb(dev, approxlen,
1628 dev->cur_cmd_info->snd_portid,
1629 dev->cur_cmd_info->snd_seq, attr,
1630 oui, subcmd, GFP_KERNEL);
1631}
1632EXPORT_SYMBOL(__nfc_alloc_vendor_cmd_reply_skb);
1633
1634int nfc_vendor_cmd_reply(struct sk_buff *skb)
1635{
1636 struct nfc_dev *dev = ((void **)skb->cb)[0];
1637 void *hdr = ((void **)skb->cb)[1];
1638
1639 /* clear CB data for netlink core to own from now on */
1640 memset(skb->cb, 0, sizeof(skb->cb));
1641
1642 if (WARN_ON(!dev->cur_cmd_info)) {
1643 kfree_skb(skb);
1644 return -EINVAL;
1645 }
1646
1647 genlmsg_end(skb, hdr);
1648 return genlmsg_reply(skb, dev->cur_cmd_info);
1649}
1650EXPORT_SYMBOL(nfc_vendor_cmd_reply);
1651
4534de83 1652static const struct genl_ops nfc_genl_ops[] = {
4d12b8b1
LRV		 1653 {
1654 .cmd = NFC_CMD_GET_DEVICE,
1655 .doit = nfc_genl_get_device,
1656 .dumpit = nfc_genl_dump_devices,
1657 .done = nfc_genl_dump_devices_done,
1658 .policy = nfc_genl_policy,
8b3fe7b5
IE		 1659 },
1660 {
1661 .cmd = NFC_CMD_DEV_UP,
1662 .doit = nfc_genl_dev_up,
1663 .policy = nfc_genl_policy,
1664 },
1665 {
1666 .cmd = NFC_CMD_DEV_DOWN,
1667 .doit = nfc_genl_dev_down,
1668 .policy = nfc_genl_policy,
4d12b8b1
LRV		 1669 },
1670 {
1671 .cmd = NFC_CMD_START_POLL,
1672 .doit = nfc_genl_start_poll,
1673 .policy = nfc_genl_policy,
1674 },
1675 {
1676 .cmd = NFC_CMD_STOP_POLL,
1677 .doit = nfc_genl_stop_poll,
1678 .policy = nfc_genl_policy,
1679 },
1ed28f61
SO		 1680 {
1681 .cmd = NFC_CMD_DEP_LINK_UP,
1682 .doit = nfc_genl_dep_link_up,
1683 .policy = nfc_genl_policy,
1684 },
1685 {
1686 .cmd = NFC_CMD_DEP_LINK_DOWN,
1687 .doit = nfc_genl_dep_link_down,
1688 .policy = nfc_genl_policy,
1689 },
4d12b8b1
LRV		 1690 {
1691 .cmd = NFC_CMD_GET_TARGET,
1692 .dumpit = nfc_genl_dump_targets,
1693 .done = nfc_genl_dump_targets_done,
1694 .policy = nfc_genl_policy,
1695 },
52feb444
TE		 1696 {
1697 .cmd = NFC_CMD_LLC_GET_PARAMS,
1698 .doit = nfc_genl_llc_get_params,
1699 .policy = nfc_genl_policy,
1700 },
1701 {
1702 .cmd = NFC_CMD_LLC_SET_PARAMS,
1703 .doit = nfc_genl_llc_set_params,
1704 .policy = nfc_genl_policy,
1705 },
d9b8d8e1
TE		 1706 {
1707 .cmd = NFC_CMD_LLC_SDREQ,
1708 .doit = nfc_genl_llc_sdreq,
1709 .policy = nfc_genl_policy,
1710 },
9674da87 1711 {
9ea7187c
SO		 1712 .cmd = NFC_CMD_FW_DOWNLOAD,
1713 .doit = nfc_genl_fw_download,
9674da87
EL		 1714 .policy = nfc_genl_policy,
1715 },
be085653
SO		 1716 {
1717 .cmd = NFC_CMD_ENABLE_SE,
1718 .doit = nfc_genl_enable_se,
1719 .policy = nfc_genl_policy,
1720 },
1721 {
1722 .cmd = NFC_CMD_DISABLE_SE,
1723 .doit = nfc_genl_disable_se,
1724 .policy = nfc_genl_policy,
1725 },
ac22ac46
SO		 1726 {
1727 .cmd = NFC_CMD_GET_SE,
1728 .dumpit = nfc_genl_dump_ses,
1729 .done = nfc_genl_dump_ses_done,
1730 .policy = nfc_genl_policy,
1731 },
5ce3f32b
SO		 1732 {
1733 .cmd = NFC_CMD_SE_IO,
1734 .doit = nfc_genl_se_io,
1735 .policy = nfc_genl_policy,
1736 },
3682f49f
CR		 1737 {
1738 .cmd = NFC_CMD_ACTIVATE_TARGET,
1739 .doit = nfc_genl_activate_target,
1740 .policy = nfc_genl_policy,
1741 },
9e58095f
SO		 1742 {
1743 .cmd = NFC_CMD_VENDOR,
1744 .doit = nfc_genl_vendor_cmd,
1745 .policy = nfc_genl_policy,
1746 },
4d12b8b1
LRV		 1747};
1748
56989f6d 1749static struct genl_family nfc_genl_family __ro_after_init = {
489111e5
JB		 1750 .hdrsize = 0,
1751 .name = NFC_GENL_NAME,
1752 .version = NFC_GENL_VERSION,
1753 .maxattr = NFC_ATTR_MAX,
1754 .module = THIS_MODULE,
1755 .ops = nfc_genl_ops,
1756 .n_ops = ARRAY_SIZE(nfc_genl_ops),
1757 .mcgrps = nfc_genl_mcgrps,
1758 .n_mcgrps = ARRAY_SIZE(nfc_genl_mcgrps),
1759};
1760
3c0cc8aa
SJ		 1761
1762struct urelease_work {
1763 struct work_struct w;
65bc4f93 1764 u32 portid;
3c0cc8aa
SJ		 1765};
1766
1767static void nfc_urelease_event_work(struct work_struct *work)
4d12b8b1 1768{
3c0cc8aa 1769 struct urelease_work *w = container_of(work, struct urelease_work, w);
4d12b8b1
LRV		 1770 struct class_dev_iter iter;
1771 struct nfc_dev *dev;
1772
c487606f 1773 pr_debug("portid %d\n", w->portid);
4d12b8b1 1774
3c0cc8aa 1775 mutex_lock(&nfc_devlist_mutex);
4d12b8b1
LRV		 1776
1777 nfc_device_iter_init(&iter);
1778 dev = nfc_device_iter_next(&iter);
1779
1780 while (dev) {
3c0cc8aa
SJ		 1781 mutex_lock(&dev->genl_data.genl_data_mutex);
1782
c487606f 1783 if (dev->genl_data.poll_req_portid == w->portid) {
4d12b8b1 1784 nfc_stop_poll(dev);
15e47304 1785 dev->genl_data.poll_req_portid = 0;
4d12b8b1 1786 }
3c0cc8aa
SJ		 1787
1788 mutex_unlock(&dev->genl_data.genl_data_mutex);
1789
4d12b8b1
LRV		 1790 dev = nfc_device_iter_next(&iter);
1791 }
1792
1793 nfc_device_iter_exit(&iter);
1794
3c0cc8aa
SJ		 1795 mutex_unlock(&nfc_devlist_mutex);
1796
1797 kfree(w);
1798}
1799
1800static int nfc_genl_rcv_nl_event(struct notifier_block *this,
1801 unsigned long event, void *ptr)
1802{
1803 struct netlink_notify *n = ptr;
1804 struct urelease_work *w;
1805
1806 if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
1807 goto out;
1808
c487606f 1809 pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
3c0cc8aa
SJ		 1810
1811 w = kmalloc(sizeof(*w), GFP_ATOMIC);
1812 if (w) {
1813 INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
c487606f 1814 w->portid = n->portid;
3c0cc8aa
SJ		 1815 schedule_work((struct work_struct *) w);
1816 }
1817
4d12b8b1
LRV		 1818out:
1819 return NOTIFY_DONE;
1820}
1821
1822void nfc_genl_data_init(struct nfc_genl_data *genl_data)
1823{
15e47304 1824 genl_data->poll_req_portid = 0;
4d12b8b1
LRV		 1825 mutex_init(&genl_data->genl_data_mutex);
1826}
1827
1828void nfc_genl_data_exit(struct nfc_genl_data *genl_data)
1829{
1830 mutex_destroy(&genl_data->genl_data_mutex);
1831}
1832
1833static struct notifier_block nl_notifier = {
1834 .notifier_call = nfc_genl_rcv_nl_event,
1835};
1836
1837/**
1838 * nfc_genl_init() - Initialize netlink interface
1839 *
1840 * This initialization function registers the nfc netlink family.
1841 */
1842int __init nfc_genl_init(void)
1843{
1844 int rc;
1845
489111e5 1846 rc = genl_register_family(&nfc_genl_family);
4d12b8b1
LRV		 1847 if (rc)
1848 return rc;
1849
4d12b8b1
LRV		 1850 netlink_register_notifier(&nl_notifier);
1851
2a94fe48 1852 return 0;
4d12b8b1
LRV		 1853}
1854
1855/**
1856 * nfc_genl_exit() - Deinitialize netlink interface
1857 *
1858 * This exit function unregisters the nfc netlink family.
1859 */
1860void nfc_genl_exit(void)
1861{
1862 netlink_unregister_notifier(&nl_notifier);
1863 genl_unregister_family(&nfc_genl_family);
1864}
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